Detailed analysis of eruption pump

The ejecting pump uses the principle of converting static pressure energy and kinetic energy into each other when the fluid is moving. It can be used not only for gas but also for liquid. In chemical production, eruption pump is often used for vacuum pumping, so it is also known as eruption vacuum pump. 

The working fluid of eruption pump can be steam or liquid. It is a steam eruption pump. The working steam is ejected from the nozzle at a high speed under high pressure. In the process of eruption, the static pressure energy of the steam is changed into kinetic energy, and the gas is sucked in under low pressure. After mixing with the steam, the aspirated gas enters into huansanfang, the velocity decreases gradually, and the pressure tension increases, and it is discharged from the pressure outlet after one fan.

The structure of the eruption pump is simple and tight, and there is no active part. However, the power is very low, and the steam consumption is large, so it is generally used as a vacuum pump, not as a pleasure delivery device. Because the transported fluid is mixed with the working fluid, its application scale is restricted.

If several jet pumps are used together, a higher vacuum can be obtained. It is a three-stage steam eruption pump. The working steam and mountain gas are absorbed into the inlet of the first stage eruption pump. The steam is condensed by the condenser, and the gas enters the second stage of the eruption pump. Then, it passes through the condenser, the third stage eruption pump and the condenser, and is finally discharged by the eruption pump. The auxiliary eruption pump is connected with the primary eruption pump in parallel to increase the starting speed. When the system reaches the specified vacuum degree, the auxiliary eruption pump can be blocked from the line. The condensate and cooling water in each condenser flow into the tank.

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Install the mechanical pump body

Install the static ring part of the mechanical seal onto the mechanical seal flange, install the positioning screw, put the O-ring into the groove of the mechanical seal flange, and then connect it to the pump body with bolts. When installing the static ring part of the mechanical seal, wet it with water and press it into the mechanical seal flange evenly by hand. Pay attention not to use too much force! After installation, check whether the mechanical seal flange and pump body are installed tightly.

Connect and fasten the pump body to the bracket with bolts. Pay attention not to damage the static ring part of the mechanical seal. It is very important to completely clean it. It is necessary to prevent the damage to the lubrication surface and elastic seal of the mechanical seal. The external surface of the elastic seal should be lubricated without damage.

When installing the moving ring part of the mechanical seal, the sleeve can be used to press it to the appropriate position on the shaft (the tension spring is compressed by about 4mm), and then the set screw is tightened. The lubricating oil is evenly applied on the shaft, and the impeller is pressed onto the shaft. The front end face of the impeller and the pump body should be kept with a clearance of 0.30 ± 0.05mm. If the gap is too small, it may form a mechanical fault: if the gap is too large, it will cause a decrease in the pumping rate of the vacuum pump.

Put in the adjusting washer, fasten the impeller pressing plate to the impeller with screws, place the motor end of the bracket down on the ground, and place the prepared diaphragm on the pump body to ensure that the small hole with the diameter of 4.3mm close to the diaphragm pump body is accurately combined with the positioning pin. Put the O-ring on the diaphragm without distortion, and then push it to the bottom of the diaphragm to make the O-ring touch the pump body.

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Gas drainage by vacuum pump / compressor

Gas accident is the most important thing in the coal mine industry in recent years. Therefore, the equipment safety of the coal mine industry can not be ignored. Since the 1950s, China began to carry out CBM drainage, and the amount of gas drainage increased continuously, which basically achieved the goal of coal mine safety and controlled the occurrence of gas accidents. There are several basic forms of gas drainage by imported vacuum pump / compressor 

According to the relationship between coal mining and drainage: pre pumping before mining, that is, the drainage of coalbed methane from the undeveloped coal seam. Because the mining area is wide and the pipeline is long, it usually has dozens of kilometers. The working environment is bad, so the imported vacuum pump / compressor is required to have large air volume, high vacuum degree and reliable operation. At present, the imported vacuum pump / compressor is designed and manufactured with international advanced technology, and the gas volume can reach 500 ~ 70000m3 / h, which can fully meet the needs of coal mining industry. This pumping method has gradually become the mainstream. This method not only becomes the guarantee of safe production, but also becomes a new clean energy, which has strategic significance for China, a big coal country. Pumping while excavating and mining while pumping, that is, CBM drainage in the process of coal seam mining. After mining drainage, namely abandoned mine, mining roadway CBM drainage.

The technology of gas drainage is to set up a gas pumping station on the ground and connect with the drainage borehole through the underground gas drainage pipeline system. When the pump is running, it will cause negative pressure, and the gas will be pumped out into the gas tank or directly supplied to the user. If the amount of gas extracted is small or unstable, it can be directly discharged into the atmosphere.

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Cleaning method of dust in vacuum negative pressure station

Vacuum negative pressure station is mainly used in chemical, petrochemical, light industry, pharmaceutical, papermaking, metallurgy and other occupations. Because of the particularity of the working environment, vacuum negative pressure station is easy to scale, which makes many companies helpless. 

In addition to preventing scaling of vacuum negative pressure station, cleaning is required for vacuum negative pressure station with severe circumstances. Detailed operation methods are as follows:

1. In case of severe scaling, it is necessary to dismantle and remove the scale. The key point is to remove the scale on the impeller and distribution plate (or distributor). Pay attention to adjust the axial clearance when assembling from the beginning.

2. If you don't want to dismantle the vacuum negative pressure station, you can use oxalic acid solution or hydrochloric acid to soak in the pump, and then wash the pump body with clean water after soaking. Pay attention to the concentration and soaking time when using hydrochloric acid to avoid damaging the pump body.

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Screw rotor of oil-free screw vacuum pump

Experts and scholars in domestic vacuum industry have long recognized that oil-free screw vacuum pump is a dry-type vacuum pump with broad application prospects and huge market potential. Compared with the traditional oil seal pumps such as rotary vane pump and slide valve pump, the oil-free screw vacuum pump has the characteristics of no oil pollution, strong ability to remove water vapor and solid dust particles; compared with liquid seal pump such as water ring pump, screw pump has the characteristics of high vacuum degree, low energy consumption and no waste liquid when extracting soluble steam; compared with claw pump and multi-stage pump, oil-free screw vacuum pump has the advantages of high vacuum, low energy consumption and no waste liquid when extracting soluble steam Compared with other dry vacuum pumps, such as Ci pump and scroll pump, screw pump has the characteristics of wide pumping speed range, simple and compact structure, non friction of pumping cavity components and long service life. 

Screw rotor is the most important pumping part in screw vacuum pump, which directly determines the working performance and service life of the pump. Its manufacturing cost accounts for nearly half of the total cost of the whole screw pump. The design and manufacture of screw rotor is one of the key technologies in the production of screw pump, and it is also a common technical problem faced by domestic enterprises in the process of developing and developing screw vacuum pump.

Because the design theory of screw rotor of screw vacuum pump is not mature enough, and there are some factors of technical confidentiality, the public information about the design of screw vacuum pump rotor is very rare. Most of the researchers and technicians engaged in the research and development of screw vacuum pump in different units in China carry out research work from the most basic principle, and find and solve a number of technical problems encountered in the development work, which restricts the speed and level of domestic screw vacuum pump development and production.

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High temperature magnetic pump

Magnetic high temperature pump series small high temperature and high pressure pump 350 ℃, mold temperature machine pump, heat transfer oil pump, hot water pump {100 ℃ - 180 ℃}, low temperature pump - 100 ℃, solar energy pump, is a real substitute for imported high temperature pump series, with reliable quality and favorable price. It can be equipped with explosion-proof motor and special pump for heat transfer oil. It belongs to high-temperature magnetic pump, with no shaft seal, no leakage and long service life. Roller heating heat transfer oil pump, oil heater special pump, film mold temperature machine heat transfer oil special pump, transport corrosive or other special performance liquid, practical in petroleum, chemical, rubber, plastic, pharmaceutical and other fields. General liquid water temperature 0 ℃ ~ 180 ℃, high temperature heat transfer oil - 100 ℃ - + 350 ℃ 

Small power high temperature and high pressure leak free pump 350 ℃, mold temperature machine pump, heat transfer oil pump, hot water pump {100 ℃ - 180 ℃}, low temperature pump - 100 ℃, solar energy pump, is a real substitute for imported high temperature pump series, with reliable quality and favorable price. It can be equipped with explosion-proof motor and special pump for heat transfer oil. It belongs to high-temperature magnetic pump, with no shaft seal, no leakage and long service life. Special pump for heating heat conducting oil, special pump for oil heater, special pump for heat conducting oil for film mould temperature machine. They are used for transporting corrosive or other special properties of liquid. They are applicable to petroleum, chemical, rubber, plastic, pharmaceutical and other fields.

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Magnetic drive pump

Based on the centrifugal pump, magnetic drive pump is a new type of centrifugal chemical process pump, which uses magnetic coupling to realize the non-contact transmission of torque, no shaft seal, full seal, no leakage, corrosion resistance and pollution-free. 

Magnetic drive pump (hereinafter referred to as magnetic pump) is usually composed of electric motor, strong coupling device and centrifugal pump. Its main feature is that the magnetic coupling device is used to transfer power. When the motor drives the external magnetic rotor of the magnetic coupling device to rotate, the magnetic line of force passes through the gap and isolation sleeve, acting on the inner magnetic rotor, so that the pump rotor and the motor rotate synchronously, and the torque is transmitted without mechanical contact Because the liquid is enclosed in a static isolation sleeve, there is no dynamic seal, so there is no leakage.

The magnetic drive pump is designed with advanced technology, which follows the high efficiency and reliability of the original centrifugal pump hydraulically. It cancels the traditional mechanical seal device and changes the rigid connection between the motor and the pump into a non-contact flexible connection, which fundamentally eliminates the shaft seal leakage.

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Measurement of temperature rise and outlet pressure of Roots vacuum pump

The temperature rise of Roots vacuum pump refers to the difference between the maximum temperature and the room temperature measured at all parts of the pump surface under the condition of stable operation of the limit vacuum or rated vacuum (referring to the direct exhaust atmosphere roots vacuum pump). The type of thermometer used for measuring temperature rise is not limited, but it should have a measurement accuracy of ± 1 ℃. When marking the temperature rise, the room temperature at that time and the cooling conditions of the pump, including the cooling method, shall be indicated. If it is water cooling, the temperature of inlet and outlet water shall be indicated. 

The outlet pressure of Roots vacuum pump refers to the pressure measured near the exhaust port corresponding to a certain inlet pressure value under the condition of stable operation of Roots vacuum pump. The test of outlet pressure can be carried out simultaneously with the measurement of pumping rate, starting from the appropriate value close to the limit vacuum until the allowable inlet pressure of the pump is about. The outlet pressure is measured corresponding to each inlet pressure value.

The measurement position of the outlet pressure is specified in the ministry standard. The distance between the pressure measuring tube and the pump outlet flange shall not be greater than the pump outlet diameter, and the opening plane of the pressure measuring pipe shall be parallel to the air flow direction. The insertion depth is 1 / 4 D, but not more than 50 mm.

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Working substance of vacuum system

The working fluids of mechanical vacuum pump and steam flow vacuum pump are water, mercury and oil used in water ring pump, mechanical pump, molecular pump, jet pump and diffusion pump. The steam jet pump and diffusion pump rely on the working liquid vapor for jet or diffusion pumping. 

Therefore, at the working temperature of the pump boiler, it is expected that the working fluid has sufficient vapor pressure. At normal temperature, oil vapor may diffuse the whole evacuated vessel and become the limiting factor of limiting vacuum. Therefore, it is hoped that the working fluid has low saturated vapor pressure at normal temperature. In addition to certain requirements for its vapor pressure characteristics, good thermal stability, oxidation resistance and moderate fluidity at room temperature are also required by Yan gas jet pump and diffusion pump. Vacuum pump oil can be roughly divided into five categories: petroleum hydrocarbon, cool, silicone oil, halogenated carbon hydride and ether.

Getters are generally divided into evapotranspiration type and non evapotranspiration type. Evapotranspiration type is sometimes also called diffusion type or flash burning type, such as calcium, magnesium, silver, barium, etc., among which barium is the most commonly used. Non evapotranspiration type is sometimes called coating type or volume type, such as Cuo, Qin, mu, etc., in which CuO is the main component of commonly used getters. In recent years, the evaporable nitrogen doped getters, non digestible chromium aluminum and chromium graphite getters have excellent gettering properties.

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sputtering ion pump type selection

When the inert gases such as argon, krypton and xenon are eliminated by the two-stage sputtering ion pump, the argon pressure will rise and then decrease suddenly in the vacuum system, and the pressure change range is 10-2 PA. This phenomenon is called argon instability. The instability of argon in two-stage ion pump after exhausting for hundreds of hours at 10-3pa or thousands of hours at 10-4Pa is given. In order to overcome this phenomenon, several improved structures of various improved sputtered ion pumps have been developed 

The structure of bipolar pump is simple, the magnetic gap of magnet is small, but the starting pressure is low. If it is not started under high pressure and there is no special requirement for inert gas pumping speed, it is better to choose this kind of pump.

If high starting pressure is required, tripole structure or other auxiliary methods can be used. The process of triode structure is complex. If it is tripotential, the power supply is also complex. The magnetic gap of the magnet is also large.

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Electromagnetic vacuum belt charging valve

The electromagnetic vacuum belt charging valve is installed on the vacuum pump to prevent the pump oil from returning, thus avoiding the pump oil from polluting the vacuum chamber. The valve can be sealed in positive direction, but not in reverse. 

When the solenoid valve is closed or suddenly cut off, the pilot valve inflates the upper cylinder chamber, and automatically closes the vacuum system according to the atmospheric pressure difference, and then fills the pump chamber with atmosphere. When the valve is powered on, the pilot valve cuts off the atmosphere and connects the upper cylinder to make the vacuum pump pump pump pump air to the upper cylinder. The piston is pushed by the spring force to open the valve plate. The vacuum pump normally vacuumizes the vacuum system. When there is no pressure difference on both sides of the valve plate, the valve can not be used, and the valve plate is in swimming state. It should be noted that the installation height of the valve should be more than 1000mm higher than the suction port of the vacuum pump, so as to avoid direct impact on the valve core channel due to the return oil of the pump.

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Usage of centrifugal pump

The basic structure of centrifugal pump is composed of six parts: impeller, pump body, pump shaft, bearing, sealing ring and stuffing box. 

1. Impeller is the core part of centrifugal pump. It has high speed and high output. The blades on the impeller play an important role. The impeller should pass the static balance test before assembly. The inner and outer surface of impeller is required to be smooth to reduce the friction loss of water flow.

2. Pump body also known as pump shell, it is the main body of the pump. It plays a supporting and fixing role and is connected with the bracket for installing the bearing.

3. The function of the pump shaft is to connect the motor with the coupling, and transmit the torque of the motor to the impeller, so it is the main part of transferring mechanical energy.

4. The sliding bearing uses transparent oil as lubricant. Add oil to the oil level line. Too much oil will seep along the pump shaft, too little bearing will overheat and burn out, causing accidents! In the process of pump operation, the temperature of bearing is the highest at 85 degrees, and generally it is about 60 degrees.

5. Sealing ring is also called leakage reducing ring.

6. Stuffing box is mainly composed of packing, water sealing ring, packing barrel, packing gland and water sealing pipe. The function of the stuffing box is mainly to close the gap between the pump shell and the pump shaft, so as not to let the water flow in the pump to the outside, and also to prevent the outside air from entering the pump. Always keep the vacuum in the water pump! When the pump shaft and packing friction heat, rely on the water seal tube to hold water to the water seal ring to cool the packing! Keep the pump running normally. Therefore, in the process of circulating inspection of pump operation, the inspection of stuffing box should be paid special attention to! The packing should be replaced after 600 hours of operation.

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Difference between self priming pump and booster pump

The main difference between self-priming pump and booster pump is that the self-priming pump has self-priming ability, while the booster pump does not have self-priming capacity. The self-priming pump installed on the pool can suck the low-level liquid into the self-priming pump body, and then transport to other places. If the liquid level is higher than the self-priming pump, the self-priming pump can not be used, and the booster pump can meet the requirements. If the liquid level is higher than the pump, select the self-priming pump Suction pump will lead to the phenomenon of motor over current at the moment of starting the self-priming pump, or the phenomenon of mechanical seal leakage occurs, so do not choose the self-priming pump if the liquid is higher than the pump or the inlet of the self-priming pump has pressure. 

The booster pump is mainly installed on the pipeline, which is used for the place where the pressure of the pipe network is low and the water can not be delivered to the user by its own pressure, or some equipment needs higher pressure, so a booster pump is specially added to boost the pressure. The booster pump does not have the self-priming function, and the liquid must flow into the pump body, so that the booster pump can work Booster pump or all centrifugal pump series are booster pump products. If you want to use a booster pump when the liquid is lower than the pump, you can choose to install a bottom valve at the bottom of the suction port to fill the booster pump and the inlet pipe with water, and the water can be pumped up. However, this effect is not ideal. After the pump is stopped for a long time, the liquid in the inlet pipe will return to the pool and the next start-up needs to be filled with water. The operation is more complicated, so the liquid is lower than the pump, so we still need to build It is suggested that the effect of self-priming pump is better.

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Combined rotary vane vacuum pump

The assembly method of the combined vacuum pump is slightly different from that of the integral type. For example, the small five piece rotary vane pump is composed of the high and low end cover plates, the high and low pump cavity plates and the middle diaphragm plates to form the whole pump body. The assembly sequence is as follows. 

First of all, clamp the bottom of the middle diaphragm assembly piece upward on the long vice (100 caliber, 220mm long), pay attention not to use too much force to crush the sealing surface of each part. When clamping, two pieces of block iron less than the thickness of the pump unit (about 10 mm thick) should be padded. Because the high and low rotor shafts of this kind of pump work synchronously through the cross joint at the shaft end, the high vacuum pump cavity group on the pump wheel side should be installed first. The specific method is to install the rotating plate and spring into the high rotor groove, pinch the rotating plate into the pump cavity, and then, together with the assembly and rotor, insert the shaft end with convex head into the shaft seal hole on the end cover plate Insert the high-end two sets of pieces into the rotor shaft and fix them on the middle clapboard with bolts. While tightening the bolts, rotate the installed pump roller. When the bolts are not too tight, tap the end cover with a small hammer to make the rotor and pump chamber natural diagonal square (at right angle).

Then tighten the bolts with force, but it should be noted that there should be no blockage when turning the pump wheel, and then install another low vacuum end; the cross groove of the low rotor shaft end should be tightly connected with the convex head of the high rotor extending through the middle diaphragm. After installing the low end cover with the same method, tighten it, and then tap the end cover with a hammer, and finally tighten the bolt. At this time, it takes a lot of effort to rotate the pump wheel After a few cycles of rotation, one hand should rotate, but there should be no local wheel load blocking. Then, the two end covers should be disassembled again, and the rotor should be taken out by grasping the rotating blade by hand. Carefully observe whether there are uniform line scratches on the rotor. If there are, it indicates that the assembly is appropriate.

If there is a black line at one end of the rotor, it is necessary to further check whether there is taper at both ends of the rotor or pump cavity. If both ends are the same size, it means that the angle between the rotor and the pump cavity is not correct, and the rotor is installed askew. According to the position of the black line on the rotor, the correction effect can be corrected. After the installation, tap the end cover gently, and then turn the belt pulley with both hands to see whether there are local wheels If there is no trace of light scribing after the rotor is removed, it means that the rotor is not close to the pump cavity at all. At this time, the assembly pieces at both ends of the middle diaphragm should be raised by one or two wires (only by reaming the four corner fastening bolt holes), so that the pump cavity and the rotor are close. If no other problems are found, apply insect glue solution to the sealing joint to assist sealing, and finally install Oil test and pumping test.


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vacuum pump

Working principle and application of diaphragm pump

Diaphragm pump is divided into pneumatic diaphragm pump and electric diaphragm pump. The whole working process of diaphragm pump refers to a process of suction and discharge. Driven by power, the piston is driven to and fro by the transmission mechanism (the stroke of the piston is changed by the regulating mechanism), and the diaphragm is pushed back and forth by hydraulic oil. When the piston moves backward, the diaphragm gradually concave, the volume of the pump chamber increases gradually, and the pressure decreases gradually. When the pressure is lower than the inlet pipe pressure, the inlet valve opens and the medium flows into the pump chamber. When the piston reaches the internal dead center, the medium fills the pump cavity and the inlet valve closes.

The suction process is completed and the extrusion process begins. When the piston moves forward, the diaphragm gradually bulges up, the volume of the pump chamber gradually decreases, the pressure increases gradually, the outlet valve opens, and the medium is gradually discharged from the pump chamber. When the piston reaches the external dead center, the outlet valve is closed due to gravity and spring force, and the discharge process is finished, and the pump starts a new suction process. In this way, the liquid is continuously inhaled and discharged to complete the purpose of conveying medium.

Since the pneumatic diaphragm pump has the above characteristics, the diaphragm pump has gradually invaded the market of other pumps in the world since its birth, and has been absolutely dominant. In other industries, such as environmental protection, wastewater treatment, construction, sewage discharge and refinement, it is expanding its market share, and has an irreplaceable position of other pumps.

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Application advantages of horizontal multistage centrifugal pump

What do you know about horizontal multistage centrifugal pump? As the name implies, it lies on the ground, is a multi-stage centrifugal pump, this pump is made of stainless steel, so it is also one of the stainless steel centrifugal pumps, with very high efficiency, and the multi-stage performance makes its use range is very wide, not only safe, but also very stable. No matter you can't understand it, it doesn't matter. Next you will have a chance to contact it comprehensively, hoping to help you.

The horizontal multi-stage centrifugal pump is different from the single-stage centrifugal pump. When it works, the noise is very small. Therefore, this kind of pump is common in the roof of high-rise buildings in cities. The volume of the whole pump is very large, and the multi-stage diversion is used for water supply and drainage of factories and mines, long-distance water delivery, domestic water supply and so on.

Because of the powerful function of horizontal multi-stage centrifugal pump, it is necessary to pay special attention to the installation, because a little carelessness will lead to work errors and bring great losses. In this regard, if you are doing homework, please pay attention to the following aspects. First, because the weight of the whole pump is very large, so do not repeat the superposition when splicing the pipeline, resulting in the pump bearing too much pressure to avoid damage to the centrifugal pump. Second, when installing, we must tighten all parts, and often check the key points. The centrifugal pump will produce large vibration during operation, which will have a greater impact on all parts. Once it is not solid, it is likely to crack and other damage. Third, it is necessary to ensure that there is no hard material in the pump flow channel before operation, because accidents are easy to occur under rapid movement.

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Submersible sewage pump with cutting in sewage treatment project

The submersible sewage pump with cutting can be used in harsh environment. It is suitable for pharmaceutical, papermaking, chemical industry, coal processing industry and urban sewage discharge system to transport liquid containing solid particles and long fibers, as well as dirty, sticky and slippery sewage and sewage. It can also be used for pumping clean water and corrosive media. It will not be clogged in operation, and the operation is extremely reliable.

In different links of sewage treatment project, the auxiliary of submersible sewage pump with cutting is needed to promote the sewage flow. Therefore, in view of different treatment environment, the performance indicators such as pump flow and allowable maximum solid diameter are fully considered, and then the cutting submersible sewage pump with appropriate flow and sewage discharge capacity is selected to maximize its performance in the most economical way The process of sewage treatment.

The application of submersible sewage pump with cutting in sewage treatment is mainly used in the areas with more granular and fibrous solids, such as inlet pump house, sludge collection pump room, sludge collecting well, digestion tank, purification tank, clarifier, dust and sand tank, which plays a key role in water flow transportation of sewage treatment plant.

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How to select the type of pneumatic diaphragm pump

First of all, the plate filter press is driven by the flow of the pump. The flow is one of the important data for selecting the pump. The selection of the pump should be based on the processing capacity and processing period of the equipment. Secondly, according to the volume of the filter chamber of the plate and frame filter press, the moisture content of the sludge after dewatering, and the sludge concentration before entering the plate and frame, the amount of sludge required for each dewatering operation of the plate and frame is converted. Then, determine a reasonable mud feeding time, such as 2-3 hours. Calculate the flow rate.

Third, pneumatic diaphragm pump material: if it is common biological sludge, ordinary cast iron or aluminum alloy material is selected, which is more economical. Other special sludge, according to the specific sludge composition, choose pneumatic diaphragm pump material, such as engineering plastic, stainless steel 304 or 316L, fully lined fluoroplastic diaphragm pump.

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Screw vacuum pump in metal smelting

As we all know, in the metallurgical industry, high vacuum smelting is widely used for production or processing, especially in some high-end fields, the requirements of impurity content, oxygen, nitrogen and even hydrogen content of products are extremely strict, so high standards and requirements of vacuum system are required.

For example, vacuum distillation (the more advanced vacuum unit composed of dry screw vacuum pump and roots vacuum pump): in the distillation tank with vacuum degree higher than 1.3 PA, the reduction product is heated at 900-950 ° for a long time, and magnesium and magnesium chloride can volatilize and condense on the condenser.

This is mainly because of the following points:

1: It can greatly reduce the boiling point of the reduced product and make it easier to volatilize.

2: It can greatly increase the volatilization rate. The volatilization rates of different substances vary greatly under different vacuum degrees.

3: Prevent the production of Ti-Fe alloy or other compounds from affecting the product quality.

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Skill of vacuum pump oil filtration and replacement

After the dust, impurities and contaminated oil sink into the bottom of the main oil tank, they flow into the auxiliary oil tank through the oil return pipe. After separation and precipitation, the emulsified oil, water, dust and impurities sink into the bottom of the auxiliary oil tank and are discharged regularly by the discharge valve. The relatively clean oil is filtered by the filter in the upper part of the auxiliary oil tank, and then enters the oil separation chamber through the oil inlet pipe, and then supplies to the end cover and pump chamber.

During the use of vacuum pump oil, due to oxidation, emulsification and various impurities mixed into the outside, some of the oil is deteriorated. When the metamorphic components and impurities reach a certain degree, the color of the oil changes, the viscosity and acid value increase, and insoluble resin like substances are precipitated, which results in the increase of vapor pressure and deterioration of performance of vacuum pump oil. At this time, the pump oil can no longer be used, and a new pump oil must be replaced.

In order to prevent the dust and particulate matter in vacuum pump oil from entering the pump cavity along with the pump oil, continuous filtering device should be set up during the operation of the pump for some technological processes. After the dust, impurities and contaminated oil sink into the bottom of the main oil tank, they flow into the auxiliary oil tank through the oil return pipe. After separation and precipitation, the emulsified oil, water, dust and impurities sink into the bottom of the auxiliary oil tank and are discharged regularly by the discharge valve. The relatively clean oil is filtered by the filter in the upper part of the auxiliary oil tank, and then enters the oil separation chamber through the oil inlet pipe, and then supplies to the end cover and pump chamber.

The filter element in the filter blocks the mechanical pollutants when the oil passes by and purifies the vacuum pump oil. The pressure gauge is often connected to the filter to show whether the filter is blocked. When the pressure increases, the oil cannot flow normally. The filter element should be cleaned or replaced.

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