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The structure of the steam ejector and how it works

2021-09-06


Steam ejector is a vacuum acquisition equipment, is the use of jet technology in the field of heat transfer, the current steam ejector is widely used in engineering, its structure is relatively simple, in the operation process is very reliable, low cost, can reasonably match the different pressure levels of steam, shrink some low-grade steam, and then improve the utilization efficiency of steam, is an important equipment for energy saving, is currently widely used in the chemical, pharmaceutical food industry, Next, I will talk to you about the structure and working principle of the steam ejector to help you better understand this equipment.
       
Steam ejector is a contact chamber, water spray, mixing chamber, diffuse chamber and other parts of the steam ejector, it is with the help of high-pressure steam through the water spray to produce high-speed airflow, at the outlet of the nozzle can produce a low-pressure area, in this area to inhale low-pressure steam, and high-pressure steam after expansion, while the low-pressure vapor compression with the pressure of high-pressure steam to improve the grade of low-pressure steam, and then at the same time through the mixing type to mix evenly mixed steam belt, The pressure of its part is restored through the diffuser chamber, so as to meet certain requirements for the user to use.
      
According to the different steam high pressure parameters, different structural designs can be carried out, so as to obtain different pressure levels of steam, which is used to meet the needs of different customers, sunset. Low-pressure steam can release cool boiling steam and condensate the steam generated by water, which can make full use of heat energy and achieve the purpose of saving energy consumption, and the energy saving rate of steam ejector can reach about 35%, so it has certain practicality in use.
       
In the steam ejector, the performance evaluation can be divided into two parts, namely the emission coefficient and the heating coefficient, where the emission coefficient in the emission coefficient is μ equal to the mass ratio of the induced steam to the induced steam, which indicates the ability of high-pressure steam to induce low-pressure steam. That is: μ=qm,1/qm,h, in the formula: qm,1 low-pressure steam mass flow, kg/h; qm, h high-pressure steam mass flow, kg/h.
       
The heating coefficient is driven by the energy difference before and after the depressurization of high-grade working steam, and the ratio of the heat supplied to the heat user and the working steam heat consumed by the jet pump is called the heating coefficient, expressed in COP. The larger the COP, the higher the efficiency of the jet pump. After reading the above content, I think the readers here have a certain understanding of the structure and working principle and even performance evaluation of the steam ejector, if you are interested in it, you can check more information on the Internet.

 

 

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