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 Dam power generation limited liability company units of 300MW each unit is equipped with 2 sets of mechanical vacuum pumps, of which 1 run, 1 spare. Vacuum pumps for vacuum unit startup, normal operation is not used out of the condenser of the gas condensation. The pump motor is equipped with 160kW, speed 590r/min, rated current 330A, voltage 380V, B-class insulation, when the normal operation current 220 ~ 230A. Every summer, electrical temperature gauge will be forced to install temporary cooling fan, but with little success. Motor is running will cause long-term high-temperature insulation aging and shorten their useful life. Vacuum motor on the reasons for the high temperature is as follows.
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   Reasonable choice of high-pressure pump high-pressure pump is generally the working pressure 14MPa, and generally choose to 25MPa high-pressure pump. Meet the needs of the flow as long as you choose. High-pressure pump factory, matching motor power is rated according to their design pressure and flow, and pressure is far lower than the rated pump pressure, so that the work flow, the pressure on the power than the rated output power is much smaller, if Choose a motor power to meet its needs when the output power compatible with the motor, you can reduce the total power drying system, reducing operating costs. Heilongjiang is a dairy products factory in accordance with security to do so. RPYP03-500-type drying unit, the traditional high-pressure pump model GJB1-25 type, matching motor power 7.5kw, and dairy products factory in accordance with an optional high-pressure pump with the model will be replaced by matching the electrical power is 5.5kw, this year 10,000 won for saving electricity, running has been good. Reasonable structure of the traditional group bags Spray powder, talcum powder into a whirlwind, two powder bags. If the choice is a powder Tornado, Tornado II is, and the use of two sets of fan, a fan of the wind than the larger, lower pressure, the secondary fan smaller than the wind, and high wind pressure, the two Taiwan ranked the total machine power and the traditional one the same fan power. With the traditional choice of a fan of comparison, the Cyclone II powder size becomes relatively small, both stainless steel materials savings, reduced investment, and convenient layout. Rational use of energy used for ventilation preheating of the inlet, and then the steam heating of the heated air of the condensed water into the air preheater to make full use of waste heat, so as to achieve the purpose of saving energy and reducing consumption.

  The use of steam jet pump jet pump steam spit in the shape of the text body and it does not drive, a simpler structure, the application more. With heat pump, compared with non-heat pump can be equal to increase efficiency. The use of partitions condenser and water ring vacuum pump with heat pump, condenser pipe snake, water ring vacuum pump condenser preheater material doubles as a full use of steam at the end of the second heat efficiency and reduce the consumption of cooling water. This structure forms of multi-effect falling film evaporator at the end of the second steam condensation effect for the same temperature of water (only have a phase transition), and then discharged from the condenser. Condensed water has a high temperature, but it is soft water, you can make good use of. Water ring vacuum pump to the evaporator of the non-condensable gas and a small amount of vapor pumped back into the atmosphere. And maintain the effect evaporation has a certain vacuum. With the use of hydraulic jet as compared to the cooling water consumption, electricity consumption is low. Bright Dairy Group, in two models of the rich RNJM02-2400 type double-effect falling film evaporator as an example, the evaporation capacity of 2400kg / h, matching the water ring vacuum pump motor power 5.5kw, cooling water consumption 9t / h, water temperature l0 ℃, water temperature 38 ℃, and the capacity of the hydraulic ejector with double-effect falling film evaporator as compared to lower power 13.5kw, an hour to save 13 tons of cooling water. Water prices by 1.00 / t, drainage price 0.80 yuan / tons, electricity and water, one can reduce the operating costs 143,391 yuan, 3 years to recover all the investment in equipment. The use of out-tube condensers andwater ring vacuum pump structure mixed condenser, cold water tower, water ring vacuum pump with heat pumps, material preheater, mixed condenser, cold water tower and water ring vacuum pump of the triple-effect falling film evaporator, by cooling water pump to the cooling water towers, the cooling water temperature 8 ℃, in the majority of the calculation of evaporator generally take 6 ℃. The pressure of cooling water pumps do not ask for much, as long as the cooling tower circulating water can be sent to the cold water, the course of their work only the cooling water circulating through the use of cold water tower, almost no additional low-temperature water, water-saving effect of special significant, especially in the greater significance of water scarcity areas. Multi-effect evaporator supporting the choice of pump is single-face mechanical seal pumps, I have been selected valve plant in Jiangsu Jingjiang fluoroplastics alloy pumps, successfully applied to food industry companies Jilin Songyuan pharmaceutical production of vitamin C, then The main purpose of Vitamin C in order to solve the corrosion resistance of the pump to the special requirements, and later successfully applied to RNJM03-5000-type three-way falling-film evaporator, and Dan Long Group and Bright Dairy companies Hailaer applications, the effect has been好. However, this alloy fluoroplastics only mechanical seal pumps water to remove Office, and supporting the electrical power and little change in the past, the selected pump. Subsequently selected the company Wuxi Pump ICB Jan 9 series single-end stainless steel plate stamping mechanical seal pumps, the same used in RNJM02-2400 type double-effect falling film evaporator, the feed pump models ICB50-25-200 type, flow 6.3m3 / h, Head 32m, motor power 2.2kw, the rest of the two materials and a condensate pump pumps are selected ICB32-25-125-type pumps, flow 3.2t / h, Head 20m, motor power 0.55kw, so that RN-JM02-2400 type double-effect falling film evaporator of the total power generating units that only support a lower pump power 6.75kw, an annual 300 days, 16 hours each day (two-shift system of work), the 32,400 yuan a year to save electricity. Jan 9天锡chosen ICB Series pumps, use of in Harbin油脂厂well. In spray drying systems use only the exhaust fan into the machine instead of Daqing in Heilongjiang dairy plant has four sets of Centrifugal Spray Dryer Group, is designed and used for many years, production of Daqing national quality brand milk powder. RGLP-500 in dry-type units as an example, according to the traditional design model into the fan 4-72-12No8C type, air flow 20100m3 / h, wind pressure 2445Pa, motor power 30kw, annual electricity savings of 144,000 yuan.

Reasonable structure of the traditional group bags Spray powder, talcum powder into a whirlwind, two powder bags. If the choice is a powder Tornado, Tornado II is, and the use of two sets of fan, a fan of the wind than the larger, lower pressure, the secondary fan smaller than the wind, and high wind pressure, the two Taiwan ranked the total machine power and the traditional one the same fan power. With the traditional choice of a fan of comparison, the Cyclone II powder size becomes relatively small, both stainless steel materials savings, reduced investment, and convenient layout.
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   Reasonable choice of high-pressure pump high-pressure pump is generally the working pressure 14MPa, and generally choose to 25MPa high-pressure pump. Meet the needs of the flow as long as you choose. High-pressure pump factory, matching motor power is rated according to their design pressure and flow, and pressure is far lower than the rated pump pressure, so that the work flow, the pressure on the power than the rated output power is much smaller, if Choose a motor power to meet its needs when the output power compatible with the motor, you can reduce the total power drying system, reducing operating costs. Heilongjiang is a dairy products factory in accordance with security to do so. RPYP03-500-type drying unit, the traditional high-pressure pump model GJB1-25 type, matching motor power 7.5kw, and dairy products factory in accordance with an optional high-pressure pump with the model will be replaced by matching the electrical power is 5.5kw, this year 10,000 won for saving electricity, running has been good.

  Feed pump models ICB50-25-200 type, flow 6.3m3 / h, Head 32m, motor power 2.2kw, the rest of the two materials and a condensate pump pumps are selected ICB32-25-125-type pumps, flow 3.2t / h , head 20m, motor power 0.55kw, so that RN-JM02-2400-type double-effect falling film evaporator of the total power generating units that only support a lower pump power 6.75kw, an annual 300 days, 16 hours each day (two working classes), the 32,400 yuan a year to save electricity. Jan 9 chosen ICB Series pumps, use of in Harbinwell.
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The use of out-tube condensers and water ring vacuum pump structure mixed condenser, cold water tower, water ring vacuum pump with heat pumps, material preheater, mixed condenser, cold water tower and water ring vacuum pump of the triple-effect falling film evaporator, by cooling water pump to the cooling water towers, the cooling water temperature 8 ℃, in the majority of the calculation of evaporator generally take 6 ℃. The pressure of cooling water pumps do not ask for much, as long as the cooling tower circulating water can be sent to the cold water, the course of their work only the cooling water circulating through the use of cold water tower, almost no additional low-temperature water, water-saving effect of special significant, especially in the greater significance of water scarcity areas.
...

   The use of partitions condenser and water ring vacuum pump with heat pump, condenser pipe snake, water ring vacuum pump condenser preheater material doubles as a full use of steam at the end of the second heat efficiency and reduce the consumption of cooling water. This structure forms of multi-effect falling film evaporator at the end of the second steam condensation effect for the same temperature of water (only have a phase transition), and then discharged from the condenser. Condensed water has a high temperature, but it is soft water, you can make good use of. Water ring vacuum pump to the evaporator of the non-condensable gas and a small amount of vapor pumped back into the atmosphere. And maintain the effect evaporation has a certain vacuum. With the use of hydraulic jet as compared to the cooling water consumption, electricity consumption is low. Bright Dairy Group, in two models of the rich RNJM02-2400 type double-effect falling film evaporator as an example, the evaporation capacity of 2400kg / h, matching the water ring vacuum pump motor power 5.5kw, cooling water consumption 9t / h, water temperature l0 ℃, water temperature 38 ℃, and the capacity of the hydraulic ejector with double-effect falling film evaporator as compared to lower power 13.5kw, an hour to save 13 tons of cooling water. Water prices by 1.00 / t, drainage price 0.80 yuan / tons, electricity and water, one can reduce the operating costs 143,391 yuan, 3 years to recover all the investment in equipment.

 Heat pump in the falling film evaporator used in the application of heat pump hot compression machine compression device for centrifugal and positive displacement compressors. Larger temperature difference between compression, generally around 11 ℃, which limits the use of mechanical compression heat pump efficiency generally does not exceed a maximum of three-way, the higher the boiling point of the solution increases when evaporation is limited, and the structure of complex, high cost , high maintenance costs, power consumption, and therefore the application of mechanical compression heat pump rarely.
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Production in the dairy industry, a reasonable selection of advanced machinery and equipment, to ensure product quality, reduce operation and maintenance costs and increase the competitiveness of dairy products and economic efficiency, and promote the development of dairy industry and the technological advances of great significance. In liquid milk, the selection process for aseptic filling equipment and is particularly prominent, but there are also a selection of equipment to reduce operating costs.
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