2019年9月30日星期一

water ring vacuum pump vacuum dewatering

water ring vacuum pump vacuum dewatering

Vacuum dewatering is a commonly used process in paper industry. Vacuum dewatering with water ring vacuum pump produced by our company is a typical case of vacuum dewatering. The specific process of vacuum dewatering is described in detail below.

The general process flow of papermaking is as follows:

Raw materials - slicing - Cooking - washing - Screening - bleaching - beating - vacuum dehydration (using water ring vacuum pump) - pressing dehydration - drying - shaping - out of the factory.

The pulp after beating contains a large amount of water. The water in pulp must be removed before it can be made into finished products. Vacuum dewatering is the first stage of pulp dewatering.


The vacuum dewatering process involves spraying pulp into a copper mesh with fine grids woven from copper wire. There is a vacuum box under the copper mesh belt at a certain distance. Under the vacuum box, a vacuum pipe is put into the vacuum pipe, and then the intake pipe of the water ring pump is connected.

Because of the vacuum caused by the water ring pump, the water in the pulp on the copper mesh can be sucked into the pipeline to achieve the purpose of dehydration.

发帖者 时间： 没有评论:

Vacuum pump in food freeze-drying

Vacuum pump in food freeze-drying

Vacuum pumps should ensure that water vapor and dry air are removed within a certain period of time to maintain the vacuum required for food moisture sublimation and desorption in the drying box. Therefore, the main performance indicators of the vacuum system should be: A. vapor extraction capacity; B. drying box vacuum limit is low enough; C. effective pumping speed at the outlet of drying box meets the requirements.


At present, in food freeze-drying, the water vapor can be directly pumped out, and the performance index B and C can be met. The only vacuum pumps used in food freeze-drying are steam jet pumps. Other vacuum pumps, such as water ring pumps and water jet pumps, can not meet the requirements of the above performance index B and c, or do not have the ability to extract water vapor (oil-sealed mechanical pumps). Vacuum pumps without performance index B and C can not be used in food freeze-drying system at present. Vacuum pumps without performance index a are widely used with cold traps. Therefore, there are two kinds of vacuum systems in food freeze dryer, one is the steam ejector pump vacuum system without cold trap, the other is the oil-sealed mechanical vacuum pump system with cold trap.

发帖者 时间： 没有评论:
标签： , ,

Oil-free scroll vacuum pump

Oil-free scroll vacuum pump

Oil-free scroll vacuum pump has the characteristics of oil-free, clean, low vibration and noise, low energy consumption, so it has broad prospects for development and market potential. However, due to the complicated design and manufacturing technology of scroll pump, mass production is not yet achieved at home, and can not meet the growing market demand. It can only rely on imported products with high price and inconvenient after-sales service. In addition, many factors such as market development and user's awareness have affected the formation of a virtuous cycle of scroll pumps in China.


Even so, the actual annual demand for scroll pumps in China is still more than thousands. It can be considered that with the emergence of high-precision CNC machine tools and processing centers, the development of scroll technology has brought opportunities and breakthroughs in key manufacturing technologies. At the same time, our country now has experienced professionals in design, research and development, testing, analysis and use, who are dedicated to the technical development of pumps meticulously and professionally. I believe that in the near future, the price is moderate, the performance is reliable and the batch is batched. Domestic oil-free scroll vacuum pump will become the mainstream product suitable for China's market requirements. Therefore, increasing investment, R&D and mass production of scroll vacuum pumps suitable for domestic demand has become one of the important tasks of the whole vacuum acquisition industry in China.

发帖者 时间： 没有评论:
标签： , ,

2019年9月29日星期日

Liquid Ring Vacuum Pump Antisepsis Technology

Liquid Ring Vacuum Pump Antisepsis Technology

The new improved anticorrosive technology scheme synthesizes the advantages of several existing corrosion-resistant liquid ring vacuum pumps. According to the different requirements of corrosion resistance and cavitation degree of the overflow parts, different technological measures are adopted on the matrix made of cast iron, cast steel or carbon steel, so as to greatly improve its acid resistance, alkali resistance, cavitation resistance and other properties, and prolong its service life. Long. Under the condition of vacuum 3kPa and water and steam scouring, the lining of overflow parts can work reliably in the prescribed maintenance cycle. Maintenance period is 0.5-2 years according to different working conditions such as corrosion medium, temperature and pump speed. Compared with stainless steel, under the same working conditions and service life, the anticorrosion cost can be effectively reduced by 1-5 times.

Because the base of the vacuum pump parts will not be destroyed, when the corrosion-resistant liner aging failure, it can be easily, economically and effectively repeated maintenance.

It can be applied to all water-ring vacuum pumps with flat-plate distributor structure, with low cost, long service life and relatively simple manufacturing process. It is suitable for pumping corrosive gases without solid substances in chemical, metallurgical, environmental protection, paper-making, pharmaceutical and other industries.

发帖者 时间： 没有评论:
标签： , ,

Reasons for Overload of Vacuum Pump

Reasons for Overload of Vacuum Pump

Combining with the installation form and working principle of vacuum pump, the causes of overload and low efficiency of vacuum pump are analyzed.

Influences of basic installation on equipment body.

The quality of equipment foundation installation has a great influence on the quality of equipment operation. The improper placement of cushion iron can easily cause the suspension of foot bolts in all parts of the equipment. In the process of alignment and fastening, the suspension of cushion iron will cause the deformation of cross head slideway in crankcase, and the obstruction of cross head during reciprocating operation in the slideway will increase the load.


The structure design of W5 reciprocating vacuum pump is that the cylinder block is at one end of the body, and the weight of the cylinder block is heavier after adding piston and intake and exhaust valves. If the lower support or upper hanger of the cylinder block is not taken into account in the basic design, the cylinder block will be in suspension state. The self-weight of the cylinder block will cause the deformation of the crankcase slideway and the concentricity of the cylinder block and slideway is poor Thus, the cross head is blocked in reciprocating operation in the slideway and the piston is blocked in reciprocating operation in the cylinder, resulting in increased load.

According to the above analysis, it is found that the cylinder end of the vacuum pump is slightly lower than that of the crankcase end, the cylinder end pad iron is less, and the cross head slideway is deformed after the anchor bolt is fastened, which causes the cross head to be blocked in the slideway and the piston to and fro in the cylinder and causes the load to increase, which is one of the causes of motor overheating.

发帖者 时间： 没有评论:
标签： , ,

Waste oil treatment of vacuum system

Magnesium smelting by silicothermic method is a process of MgO CaO being reduced by Si under high temperature and high vacuum. In vacuum engineering, H-spool pump is used as the front pump of the main pump, and oil pump is used as the spool pump, usually KK-1_ vacuum pump oil. In the reduction process, dust, water or steam from pellets will enter the pump chamber, emulsifying the vacuum pump oil. The emulsified pump oil will destroy the seal of the pump and make the vacuum degree of the system less than the rated vacuum degree. That is to say, the effect of H-spool pump depends on the quality of the vacuum pump oil.


In the process of pumping, it mainly depends on the high viscosity of vacuum pump oil, which is not easy to compress. It plays the role of sealing, lubrication and cooling in the pump. However, when dust, water (or steam) in pellets are absorbed into the vacuum pump chamber, the vacuum pump oil is rapidly emulsified, dirty and deteriorated, which makes the vacuum pump unable to exert its effect. The vacuum degree of the system immediately decreases, which affects the rate of reduction reaction and the quality and output of magnesium. In order not to affect the quality and output of crude magnesium during reduction, oil must be replaced and the polluted waste oil (press) The actual consumption of magnesium vacuum pump oil is 50kg). If it is not treated and reused, the production cost of magnesium will be affected.

发帖者 时间： 没有评论:
标签： , ,

2019年9月27日星期五

Industrial liquid ring vacuum pump

Industrial liquid ring vacuum pump

In fact, the liquid ring vacuum pump (water ring pump) is a kind of coarse vacuum pump. In this respect, we should pay attention to the fact that the limit vacuum it can obtain is actually 2000-4000Pa. In terms of its series atmospheric ejector, to a large extent, it can actually reach 270-670 Pa. Moreover, the water ring vacuum pump, to a certain extent, will be called a compressor.

Furthermore, we should pay attention to the liquid ring vacuum pump, which will be used as a self-suction pump at the beginning, in fact, it will gradually be used in petroleum, chemical industry, as well as in many industrial sectors such as machinery, mining and light industry, medicine and food.

In many process of industrial production, vacuum filtration, vacuum water diversion and vacuum feeding are common, followed by vacuum evaporation, vacuum concentration, vacuum moisture return and vacuum degassing. In fact, liquid ring vacuum pump itself is The steel frame has been widely used.

Next, we should pay attention to the rapid development of vacuum application technology, liquid ring vacuum pump in the rough vacuum access, has been paid attention to. Because the gas compression in the liquid ring vacuum pump is isothermal to a large extent. In this regard, we should pay attention to the fact that it can extract flammable or explosive gases to a certain extent. In addition, it can also extract dusty or water-bearing gases.

Later, in fact, the liquid ring vacuum pump body will be directly equipped with a suitable amount of water as its working fluid. Moreover, as far as the impeller is concerned, that is to say, when it rotates clockwise in the direction indicated by the impeller, the water will be thrown around directly by the impeller, because the centrifugal force on the liquid ring vacuum pump will form a closed structure.

发帖者 时间： 没有评论:
标签： , ,

Miniature vacuum pump

Miniature vacuum pump

Miniature vacuum pump is widely used in many industries because of its own advantages. The volume of the equipment is very small in the process of using. There is no oil in the process of using the miniature vacuum pump, so it is very environmentally friendly in the process of using.

Nowadays, the specifications of miniature vacuum pump are very many. In the process of selecting, the manufacturer first needs to clarify the use of the equipment. If the equipment does not need manual water before pumping, the pump can pump the low water more effectively, otherwise it will be unable to pump and damaged. This happened.

The advantage of the miniature vacuum pump is that when the equipment is not in contact with water, it directly pumps the vacuum. After the vacuum is formed in the equipment, it needs to press the water up by air pressure, and then start pumping. In the process of using, it may be pumped directly because there is no water in the pump. After forming a vacuum, the water is pressurized by air pressure, and then pumped.

The resistance of the miniature vacuum pump appears in the process of pumping, and then reduces the scope of selection according to its judgment conditions. But in the process of using the amount, we need to consider the exhaust end of the equipment in time, so as to better select the optional range.

In the practical application of micro vacuum pump, the exhaust status of the equipment is different. One is that the exhaust is relatively smooth and directly to its atmosphere. The other is that the exhaust resistance is relatively large, such as the exhaust pipeline has valves, large damp sensors and other components.

发帖者 时间： 没有评论:
标签： , ,

Vacuum Pump for Vacuum Negative Pressure Adsorption

It is widely used for vacuum adsorption of thin and smooth metal products, glass, paper, density boards, wood boards, plexiglass, PVC boards, etc. It can also be used in vacuum casting of gold and silver jewelry, impregnation with temperature, wood grain transfer printing of aluminium alloy and other industries.

Combined with the comprehensive parameters of water ring vacuum pump and the actual situation of NC engraving, the vacuum pump of engraving machine is based on the requirement of woodworking NC engraving adsorption. A vacuum negative pressure device specially designed for woodworking adsorption, glass adsorption and metal adsorption needs vacuum adsorption, vacuum traction, vacuum lifting and vacuum intermittent feeding.


The vacuum pump of engraving machine consists of main negative pressure power source water ring vacuum pump, vacuum check valve, muffler, solenoid valve, air switch, filter, circulating water tank, pipeline and valve.

发帖者 时间： 没有评论:
标签： , ,

2019年9月26日星期四

Wiring mode of vacuum unit

The newly purchased vacuum unit only leads out the cables before use, and needs to connect the cables by itself when installed. However, when connecting the cables, we must pay attention to the correct method, otherwise it will have a great impact on the use of the vacuum unit. Next, we will explain the connection mode of the vacuum unit.

In connection with vacuum unit, we should pay attention to the need to use polyester insulating tape to wrap half of the first circle, wrap 8-12 layers, wrap them up, then use plastic tape to wrap two layers for strength; about the vacuum unit in connection, it should be in its cable copper core stripped out about 30-35 mm long, with abrasive cloth Wipe the copper wire clean and shine properly. Also strip the copper wire of three-core cable from 30 to 35 mm and wipe it with sand cloth.

The wiring of the vacuum unit will insert the three-core cable into the stripped copper wire part of the external cable, then tie it tightly with a thin copper wire according to the graphic pattern, cut off the remaining part, press it flat with scissors to prevent the tie-up; when wiring the vacuum pump, the three wire heads should be soldered firmly with solder respectively, requiring the surface of the solder head to be smooth. Slip, no burr and false welding. If there is no soldering or non-smooth, vacuum pump should be re-welded until the requirements are met.

The grounding wire of the vacuum unit must also be wrapped according to the requirements of submersible cable wiring technology; after the connection of the vacuum unit, the insulation resistance of the unit should be continuously shaken to observe its changes while it goes down the well in order to prevent the cable insulation skin from being broken on the wall of the well. If the insulation level drops sharply below 0.5 Mega ohm, the unit must be lifted up. Detection of causes.

The wiring of vacuum unit must be wrapped with plastic tape to cover three wires and two layers. The first layer exceeds 50 mm at the end of each conductor insulation layer, and the second layer exceeds 50 mm at the end of the first layer. After wrapping, a basin of cold water should be taken to immerse the wrapped wire head safely in water. After 12 hours, insulation should be measured by 500V megohm meter. It should not be less than 50 megaoh, otherwise it should be re-dressed until it meets the requirements.

发帖者 时间： 没有评论:
标签： , ,

Vacuum system and high vacuum system

There are many kinds of vacuum application equipment, but no matter what kind of vacuum application equipment, there is a suction system to exclude the gas in the vacuum container, so as to obtain the required vacuum conditions in the vacuum container. For example, a container for vacuum treatment is connected with a vacuum pump by pipes and valves. When the vacuum pump evacuates the container, there must be a vacuum measuring device on the container, which constitutes a simple vacuum pumping system.

Simple vacuum system can only obtain the vacuum degree in the low vacuum range in the pumped container. When it is necessary to obtain the vacuum degree in the high vacuum range, a high vacuum pump is usually connected in series in the vacuum system. When a high vacuum pump is connected in series, valves are usually added to the inlet and outlet of the high vacuum pump, so that the high vacuum pump can keep the vacuum alone. If the series high vacuum pump is an oil diffusion pump, in order to prevent a large amount of oil vapor from flowing back into the pumped container, a trap - water cooling baffle is usually added at the entrance of the oil diffusion pump. According to the requirements, dust collector, vacuum relay gauge head, vacuum soft connection pipeline, vacuum pump inlet vent valve and so on can also be added to the pipeline, thus constituting a relatively perfect high vacuum system.
发帖者 时间： 没有评论:
标签： , ,

Water Ring Vacuum Pump Daily Management

The service life of the water ring vacuum pump is not only related to the quality of the pump itself, but also to its daily management. Therefore, regular management and maintenance of the water ring vacuum pump is indispensable. So, what are the daily management of water ring vacuum pump?

1. Clean and change oil regularly: Kerosene or straight-run gasoline should be used to clean the water ring vacuum pump. After washing, all parts should be wiped, dried or dried with a blower. When changing oil, 100 or 1 clean vacuum pump oil should be selected. If replaced by other oil, the vacuum degree of the pump will be seriously affected.

2. Before starting the pump, check whether the rotation direction of the motor is correct, whether the lubrication system is reliable, and whether the amount of oil is appropriate.

3. In daily operation, we should ensure that the oil temperature does not exceed 75 C, and that there is not too much noise and vibration, otherwise we should stop the machine for maintenance.

4. The connection pipeline between pump and user system should be short and thick, and the elbows should be minimized. If there are elbows, all joints should be sealed strictly to ensure no leakage.

5. When stopping the pump, the valve connected to the vacuum system should be closed first, and the exhaust valve should be opened to avoid pumping oil being sucked back into the vacuum system, and then the power supply of the motor should be cut off.

发帖者 时间： 没有评论:
标签： ,

2019年9月24日星期二

Oil Return Treatment of Liquid Ring Vacuum Pump

In the daily operation of liquid ring vacuum pump, may encounter the phenomenon of oil return. If not handled in time, it will affect the operation or damage the function of the equipment. Here are some ways to deal with this problem. We can also make up for the check valve of the liquid ring vacuum pump is not closed properly. After shutdown, the oil level will drop quickly, and then again. Open and stop, investigate changes or disassemble to see.


The oil seals in the two pump caps of the liquid ring vacuum pump can be interchanged because of improper installation or abrasion. The flat surface of the pump cap or body can be repaired. The exhaust valve discs of the liquid ring vacuum pump are damaged and should be interchanged.

The liquid ring vacuum pump is now widely used in food, petroleum, chemical industry, pharmaceutical, metallurgical industry and electronic fields. It can also be used to pump various gases and corrosive gases without solid particles. In daily operation, regular operation of liquid ring vacuum pump is also very important.


发帖者 时间： 没有评论:
标签： , ,

Precautions for selection of Roots vacuum pump unit

Understand the composition of the extracted gas, the gas contains no condensable vapor, particle dust, corrosion and so on. When choosing a vacuum pump, it is necessary to know the gas composition and select the appropriate pump for the pumped gas. If the gas contains vapor, particles, and corrosive gases, it should be considered to install auxiliary equipment such as condenser, dust collector in the intake pipeline of the pump.

The working pressure of Roots vacuum unit should meet the requirement of vacuum equipment's limit vacuum and working pressure. Such as: a vacuum drying process requires 10 mmHg (absolute pressure) working pressure, the limit pressure of the selected vacuum pump should be at least 2 mmHg, preferably less than 1 mmHg. Usually the limit pressure of the pump is half to one order of magnitude higher than the working pressure of the vacuum equipment.

Correctly select the working point of Roots vacuum unit. The normal working range of Roots vacuum unit is from maximum suction pressure to limit pressure *5.

发帖者 时间： 没有评论:
标签： , ,

Water Ring Vacuum Pump Starting Mode

After long-term shutdown, the water-ring vacuum pump must rotate the coupling by hand for ten days before starting, so as to confirm whether the water-ring vacuum pump shuts off the cut-off valve on the intake manifold of the pump, and what is the proper way to start it?

Turn off the cut-off valve on the intake manifold of vacuum pump; If the exhaust pipe of the gas-water separator is equipped with the cut-off valve, it should also be turned off; The cut-off valve of the water supply pipeline that opens the omni-directional gas-water separator power supply pipeline leaks water to the height-width ratio of the overflow water pipe to the separation equipment; When the water of the gas-water separator reaches the level of the overflow water pipe gauge requiring the height-width ratio Start the motor when facing.


Open the shut-off valve on the exhaust pipe of the separating equipment, adjust the water flow from the separating equipment to underwater concrete by ball valve, so as to minimize the rated power consumption of the motor within the required technical range, and adjust the shut-off valve for feeding water to the separating equipment, so as to minimize the water flow consumption and ensure the technical standards stipulated by the pump.

Adjust the flow of water to the packing box, so as to ensure the sealing of the packing box by using at least the water flow consumption. When a mechanical pump is in extreme operation, it produces burst sound because of the physical effect in the pump, but the power consumption of the output does not increase as a result. When the burst sound occurs with the increase of the output power consumption, the parking inspection should be given when the pump works abnormally.

发帖者 时间： 没有评论:
标签： , ,

2019年9月23日星期一

Dry Screw Vacuum Pump Selection

Dry Screw Vacuum Pump Selection

Dry screw vacuum pump is a kind of mechanical equipment used for conveying or pressurizing fluid. There are many kinds of dry screw vacuum pump, such as centrifugal pump, pipeline pump, sewage pump, screw pump and so on. Today we are going to talk about the relevant knowledge of screw pump.

Dry screw vacuum pump has the characteristics of variable transmission, strong self-priming ability and reversibility. It is used to transport water, wet sludge and flocculant liquid in sewage treatment plant. When choosing screw pump, we should abide by the principles of economy, rationality and reliability. If the selection of screw pump is not thoughtful, it will cause a lot of trouble in the future use, management and maintenance. Therefore, when choosing dry screw vacuum pump, we should choose not only to ensure the smooth operation of production, but also to reduce the cost of repair.

发帖者 时间： 没有评论:
标签： , ,

Stainless steel centrifugal pump

Stainless steel centrifugal pump

Stainless steel centrifugal pump is a centrifugal pump with compact structure, small volume, light weight, low noise, remarkable energy saving effect and convenient maintenance. It adopts standard vertical motor and fast loading mechanical seal, which is very convenient to replace. Stainless steel is the overflow part of stainless steel centrifugal pump.


The material is composed of organic acids, organic compounds, alkali, salt solution and so on. It can be transported between - 20 C and 100 C. It has good corrosion resistance.

Stainless steel centrifugal pump uses a new type of mechanical seal device, which can be used in a wide range of areas. For example, chemical industries such as chemistry, electricity, paper, food, pharmaceuticals, synthetic fibers and so on.

发帖者 时间： 没有评论:
标签： , ,

Stainless steel screw pump

Stainless steel screw pump

Stainless steel screw pump is a new type of pump based on the principle of rotating meshing volume. The main working parts of stainless steel screw pump are eccentric screw (rotor) and fixed bushing (stator), because the special geometric starting point of these two parts forms a separate sealing chamber, the medium flows uniformly along the axis, the internal flow is small, the volume remains unchanged, the pressure of stainless steel screw pump is stable, and there will be no eddy current and stirring. The output pressure of each stage of stainless steel screw pump is 0.6 MPa, the lift is 60m (clear water), and the self-priming height is generally greater than 3m.

Because the stator is made of many kinds of elastic materials, this kind of pump has the characteristics that the general pump can not be competent for the transportation of high viscosity fluid and the transportation of medium containing rigid suspended particles or fibers, and its flow rate is proportional to the rotational speed. Transmission can be driven directly by coupling or by high-speed motor, triangular belt, gearbox and other devices. Stainless steel screw pump has the advantages of fewer parts, compact structure, small volume, simple maintenance, easily damaged parts of rotor and stator, simple structure, easy installation and disassembly.

Vacuum Pump In Oil Filter
发帖者 时间： 没有评论:
标签： , ,

2019年9月20日星期五

Vacuum pump system knowledge

Vacuum pump system knowledge

What should we pay attention to when using the vacuum pump system? Today we will introduce this knowledge to you, hoping that through our introduction we can better help you understand.

Before the vacuum pump system is put into operation, it is necessary to carefully check whether the fasteners in various parts are loosened or not, and if loosening occurs, the tightening must be corrected. Before starting, the water tank must be filled with water, open the inlet valve of the pump, and then run the anti-corrosion pump. It is strictly prohibited that the pump is dehydrated, idle and reversed to prevent damage to the seal, impeller and other parts of the pump body. Before the vacuum unit stops, it opens the vent valve or reduces the vacuum to less than 0.092 MPa before stopping. In order to prevent backdraft damage to check valve caused by excessive vacuum. If the check valve fails, please open the check valve cover and remove debris.

When using steam-water series jet vacuum unit, the steam valve should be opened before starting. When stopping, the steam valve should be turned off before stopping, so as to prevent damage to the water jet vacuum pump caused by excessive temperature. When installing steam pipeline in vacuum unit, the pipeline must be kept level to prevent water accumulation in the pipeline, otherwise the vacuum effect will be affected. The circulating water in the water tank should be replaced or supplemented frequently, and the lower water temperature should be kept as far as possible, because excessive water temperature will affect the exhaust volume and vacuum degree.


发帖者 时间： 没有评论:
标签： , ,

Effect of Scale on Water Ring Vacuum Pump

Scale has a certain impact on water ring vacuum pump, because the working fluid (water) usually contains calcium, magnesium and other carbonates. When the water ring vacuum pump is running normally, the solubility of carbonate in water decreases with the increase of heating temperature. After long-term operation of the pump, the substance gradually crystallized and precipitated, and attached to the disc, impeller, pump body and other components.

After long-term operation of water ring vacuum pump, the scale in the pump is serious, which often leads to the reduction of the clearance between impeller and disk. During the operation of water ring vacuum pump, abnormal noise, excessive starting current, obvious decrease of suction and vacuum degree occur, which results in the decrease of vacuum pump efficiency.


For water ring pumps, there are many factors affecting their actual operation efficiency. Therefore, in the daily operation and maintenance process, it is necessary to establish perfect vacuum pump design, modification and selection, as well as operation and maintenance measures from the aspects of temperature and saturation of inhalation medium, type and temperature of working fluid, exhaust pressure, liquid level and flow rate of working fluid, in order to ensure the best work of vacuum system in hospital all the time. Working under conditions. At the same time, the mechanical efficiency of the vacuum system can be effectively improved in the actual operation process.

2SK Liquid Ring Vacuum Pump
发帖者 时间： 没有评论:
标签： , ,
订阅： 博文 (Atom)