Vacuum pump vacuum material drying

Vacuum pump vacuum material drying

In the process of material drying, in order to improve efficiency and reduce the temperature of liquid (or water) volatilization, vacuum auxiliary system is usually needed. However, what should be paid attention to in the design and use of vacuum material drying system?

In the vacuum material drying system, it should be noted that when the moisture content of the dried material is not large, a condenser of sufficient size must be installed in front of the water ring vacuum pump, so that the condensable gas can be converted into liquid, and the gas temperature entering the water ring vacuum pump is low.

In the vacuum material drying system, it should be noted that when the evaporated liquid of the dried material is large, the integrated condensing device must be used together with the water ring vacuum pump to ensure the high efficiency, stability and durability of the vacuum material drying system.

industrial vacuum pumps,vacuum furnaces

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Rotary Piston Vacuum Pump

vacuum system pressure parameters

vacuum system pressure parameters

Pressure parameter can be seen everywhere in vacuum system, which refers to the vertical force of gas on the surface of solid or liquid, and it is synonymous with pressure in vacuum system.

The most common pressure parameter is naturally the ultimate pressure. Limit pressure is one of the main parameters of vacuum pump performance in vacuum system. It is generally understood that in the process of vacuum system pumping, after a long time of pumping, when the pumping speed of vacuum pump or vacuum unit is 0 or the pressure parameter of vacuum chamber is maintained at a certain value all the time, that is the limit pressure of vacuum pump or vacuum unit.

Secondly, work pressure. Working pressure is the pressure parameter which is necessary to ensure the process implementation and product quality in the production process of an enterprise. In the process of vacuum equipment selection, in order to meet the process requirements, the limit pressure of the equipment will be lower than the working pressure by an order of magnitude.

Foundation pressure. In some process fields or technical personnel's mouth, the basic pressure is also called background pressure, which refers to the pressure of the vacuum chamber at the beginning of the production process. For example, for magnetron sputtering applications, it may be necessary to pump the local pressure to 10-4Pa, while the working pressure during sputtering may be about 1pA.

Residual pressure. In some cases, the residual pressure is actually the same as the ultimate pressure, which refers to the total pressure of the residual gas in the vacuum chamber after a period of pumping operation of the vacuum pump or vacuum unit. If the vacuum system has no pumping speed at this time, the residual pressure is the limit pressure of vacuum pump or vacuum unit.

Dry Vacuum Pump Distillation Process

Water Ring Pump

Water Ring Vacuum Pump

Relationship between vacuum degree and pressure of water ring vacuum pump

Relationship between vacuum degree and pressure of water ring vacuum pump

In the selection and use of vacuum pump, we usually use the limit pressure or vacuum degree, pumping speed, flow and other parameters to determine the performance of vacuum pump. Then there will be a problem, many customers will struggle with the relationship between vacuum and pressure.

In the simplest words, the higher the vacuum, the lower the pressure. In detail, we will start with the meaning of vacuum and pressure.

Vacuum degree refers to the thinness of gas. We usually use "high vacuum degree" and "low vacuum degree" to express it. That is to say, the thinner the gas is, the higher the vacuum degree is. On the contrary, the lower the vacuum degree is. In terms of expression, pressure has always been used. The pressure in vacuum system is synonymous with pressure, which refers to the vertical force of gas on the surface of solid or liquid per unit area. Therefore, it can be generally understood that the more gases, the greater the natural force on the surface of the object, the greater the pressure; on the contrary, the less gases, the smaller the force, the smaller the pressure.

Together, the higher the vacuum, the thinner the gas, that is to say, the less the natural pressure on the object; the lower the vacuum, the more the gas, the greater the pressure.

So when we select the type of vacuum pump, we can see that the lower the limit pressure is, the higher the vacuum degree of the representative vacuum pump is, the more thorough the corresponding pumping performance is, and the lower the pressure can be achieved in practical application.

Water Ring Vacuum Pump Impeller Damage Causes

Water Ring Pump Operation

Vacuum Pump Vacuum Cooling

water ring vacuum pump system working process

water ring vacuum pump system working process

The sealed water pump is to provide enough sealed cooling water for the vacuum pump. Under normal conditions, the water volume is 200 L / min, and the temperature is 10 ~ 30 ℃. The circulation process is: sealed water pump → sealed water cooler → vacuum pump → gas water separator → sealed water pump. The water storage capacity of the gas water separator and the whole system is 2 m3. The water replenishment and consumption of the unit in normal operation are less.

In the suction system of the vacuum unit, the air extractor has two air suction ports. When the vacuum pump is just started, the air in the vacuum system of the condenser enters the vacuum pump through the bypass of the air extractor, and then enters the steam water separator together with the working water. When the negative pressure at the inlet of the vacuum pump reaches 13.3kpa, the air extractor is actually started and put into operation, and the bypass valve of the air extractor is automatically closed. Under normal conditions, when the air extractor operates for 30min, the negative pressure in the vacuum system of the condenser can reach the required vacuum value.

The air leakage measurement system is set in the vacuum pump set, which can measure the air leakage into the vacuum system at any time safely and conveniently. The method is to change the status of the movable air converter of the ejector at the inlet of the driving air from the air flow direction to the direction of the separator, that is, the air in the separator is used as the driving air source of the ejector, and the air exhaust valve on the upper part of the tight air-water separator is closed, so that the true air system of the whole unit forms a closed system, at this time, all the leakage air flow measuring devices are opened The inlet valve can easily get the air leakage of the vacuum system. In this process, the vacuum pump group has been in normal operation, and the vacuum system of the whole unit is not affected. When the air leakage of air leakage measuring device is 5kg / h, the corresponding vacuum tightness is 26.66pa, and when the air leakage is 25kg / h, the corresponding vacuum tightness is 133.3pa. Therefore, as long as the air leakage is less than 25kg / h in each test, it can be considered that the vacuum system tightness test of condenser is qualified.

In addition, the ejector heater is also set in the system. When the temperature of the vacuum pump area is lower than 10 ℃, in order to ensure the stable operation of the system, the heater must be put into operation.

Liquid Ring Vacuum compressor
Rotary Piston Vacuum Pump
Dry Type Vacuum Pump

water ring vacuum pump in paper mill characteristics

water ring vacuum pump in paper mill characteristics

Water ring vacuum pump uses water as medium to complete energy conversion. Water is both working fluid and sealing fluid. In the working process of water ring pump, work produces heat, which will make the working water temperature rise, and part of water and gas will be discharged together.

Therefore, it is necessary to continuously supply water to the pump to cool and supplement the water consumed in the pump, maintain the formation of normal working water ring, and meet the working requirements of the pump. Since it is necessary to make up water continuously, it should also be allowed to bring some water from the pumped gas. In fact, the water ring vacuum pump is also widely used to pump water containing gas.

Therefore, when the water ring vacuum pump works, in addition to the water from the pump water supply pipe, it is possible to enter some water from the suction port. If the vacuum pump adopts the independent water supply pipeline outside the shaft seal, it is possible to flow a small amount of water from the shaft seal. The water ring vacuum pump is generally used in paper mills. Water enters the pump from the water supply pipe, air inlet and shaft seal. Water from different ways into the pump can not be used as make-up water to meet the needs of the pump. Water entering the pump due to abnormal operation will have a negative impact on the performance of the pump.

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Water Ring Vacuum Pump manufacturers

Best Water Ring Vacuum Pump

Water ring vacuum pump unit

Water ring vacuum pump unit

Water ring vacuum pump unit can be understood as water ring vacuum pump closed cycle system, water ring vacuum pump negative pressure station, roots water ring vacuum unit. This kind of product is called water ring vacuum pump unit in the minds of the majority of users. The following is a brief introduction of the composition and function of each water ring vacuum pump unit:

Water ring vacuum pump closed cycle system: the water ring vacuum pump closed cycle system is generally composed of water ring vacuum pump, steam water separator, heat exchanger, one-way valve, water supply solenoid valve, ball valve, pipeline, electric contact vacuum gauge, control cabinet, frame, etc. its main function is to make the working fluid in the water ring vacuum pump recycled, generally in the chemical industry and water resources comparison The water ring vacuum pump unit can be used by the deficient enterprises, so as to greatly reduce the sustainable utilization of water resources or chemical working fluid, thus reducing the cost of enterprises.

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Classification of stainless steel vacuum pumps

Classification of stainless steel vacuum pumps

Stainless steel vacuum pump is widely used, and the vacuum pump on the market is also various, and its classification is different in different application environments. Let's briefly understand its main classification.

2BV water ring vacuum pump is suitable for continuous operation to form a vacuum and to remove dry and wet gases, mainly non flammable, non corrosive atmosphere and atmosphere / steam mixture. According to the requirements of customers, we can provide vacuum pumps suitable for flammable, explosive and toxic media.

In this case, users should take corresponding safety measures. The working fluid is usually water. 2BV vacuum pump is suitable for the occasions with more stringent requirements on corrosion prevention and sanitation. 2BV vacuum pump is used in the range of coarse vacuum; the limit vacuum is determined by the saturated vapor pressure of working fluid.

2SK series two-stage water ring vacuum pump is characterized by high vacuum degree and large pumping speed in high vacuum area; compact structure and convenient maintenance; wide application range, it can pump various gases containing water vapor, inflammable, explosive, small amount of dust and small amount of liquid; main water is used as working medium, with low maintenance cost; it can work in a relatively harsh environment.

It is suitable for working conditions with suction pressure lower than -0.08mpa. 2sk-p1 series is suitable for working conditions with suction pressure lower than - 0.096mpa. When equipped with air pump, the limit vacuum degree can reach - 750mmhg. The working vacuum range is -0.03-0.08mpa.

Water Ring Vacuum Pump manufacturers

Roots vacuum pump

Liquid Ring Vacuum compressor