Imported steam jet vacuum pump

Imported steam jetformulavacuum pumpIt is a device that uses water vapor as a pumping medium to obtain vacuum. Steam of a certain pressure is sprayed through a Laval nozzle at supersonic speed Get out. Convert pressure energy into velocity energy. At the nozzle outlet, low pressure is formed due to the injection effect of high-speed steam flow. The working steam and the extracted airflow are mixed in the mixing chamber and undergo energy exchange. The mixed airflow is decelerated and pressurized in the diffuser tube. Due to different vacuum requirements from users. Each steam jet vacuum pump can be connected in series with a single stage or multiple stages. The more levels there are, the higher the vacuum degree(The lower the residual pressure)

working principleDriven by the energy difference before and after steam pressure reduction, high-pressure steam generates high-speed airflow when passing through the nozzle, creating a low-pressure area at the nozzle outlet. Low pressure steam is drawn into the equipment in this area, and high-pressure steam compresses low-pressure steam while expanding. The grade of low-pressure steam is improved by the excess pressure of high-pressure steam, and then mixed well in the mixing chamber. The mixed steam is then restored to partial pressure loss through the expansion chamber, and supplied to thermal users after reaching the required steam pressure. According to the parameters of high and low pressure steam, different structural designs can be made for the equipment to obtain steam of various pressure levels, meeting the requirements of different heat users. The low-pressure steam sucked in through the steam jet heat pump can be either discharged waste steam or flash steam generated by condensed water, fully utilizing the low enthalpy heat energy and achieving the goal of energy conservation. The energy-saving rate of steam jet heat pump can reach35%Left and right, with good practicality.

Working principle of the unit:

1.The first stage steam jet vacuum pump is connected to the production equipment to extract its gas, steam or gas and compress it inside the pump10 mmHg左右

2.The secondary steam jet vacuum pump continues to compress the working medium mentioned above70 mmHgThen the discharged gas is directed to the tube condenser for condensation. The condensed liquid enters the lower three-stage water ring pump for suction, and is compressed before being released into the atmosphere

Imported steam jetformulavacuum pumpoperationOperation

Starting sequence Starting sequence

1Close all globe valves and gate valvesClose all stop valves and gate valves

2Steam pipeline discharge, drainage, continuous release of exhaust gas, supply of saturated steam, slightly open the discharge valve

3Turn on the water ring pump, open the water valve for the supply pump, and open the shut-off valve in the vacuum manifold until it reaches approximately93、9Millibars

4Start the secondary steam jet vacuum pump, and the input steam pressure before the nozzle should not be lower than3、5Ba, the height cannot be higher than5Ba

5Start the first stage steam jet vacuum pump, and the steam pressure in front of the nozzle should not be lower than3、5Ba

6After all jet pumps are started, adjust the water inlet valve of the condenser to ensure that the temperature of discharged water does not exceed36℃

Shutdown sequence Shutdown sequence

1Close the vacuum main valve

2Close the steam valve of the first stage jet pump

3Close the steam valve and steam main valve of the secondary jet pump

4Release the air and stop the water ring pump, and close all water supply valves