Novel device for improving working efficiency of steam jet pump

Abstract

The utility model relates to a novel device for improving the working efficiency of a steam-jet pump, and belongs to the field of chemical machinery. In the vacuum salt manufacturing industry, an existing steam-jet pump is influenced by water drops carried by gas entering an atmosphere mixing condenser, and the problems of low efficiency, equipment corrosion, unstable final-effect vacuum degree and the like exist. According to the device, a novel gas-water separation device is arranged between an inlet of a steam-jet pump and an atmosphere mixing condenser and comprises a shell, a tangential inlet pipeline, an outlet pipeline, a sewer pipeline, an upper-end multi-waveform water collecting device and the like. Water-drop-containing gas is tangentially introduced into the shell through the inlet pipeline to rotate, water drops are thrown to the wall surface under centrifugal force to be collected and fall down, residual water drops are collected for multiple times by the multi-waveform water collecting device, and finally the water drops are discharged into the water seal tank to realize gas-liquid separation. The device effectively reduces the content of water drops in gas, improves the efficiency of the steam jet pump, reduces corrosion of chloride ions to equipment, improves the extraction efficiency of non-condensable gas, improves the final-effect vacuum degree and the productivity, and meanwhile brings remarkable economic benefits including saving of spare part cost, saving of labor cost and yield increasing benefits.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of chemical machinery, in particular to a novel device for improving the working efficiency of a steam jet pump. BACKGROUND

[0002] In the vacuum salt making industry, the final effect vacuum degree is a key process parameter, which is directly related to the brine evaporation amount and the wet salt yield. To ensure a high vacuum degree, a large flow of circulating cooling water needs to be mixed with the secondary steam of the final effect, and a steam jet pump needs to extract non-condensable gases (such as air, hydrogen sulfide, etc.) from the brine.

[0003] The steam jet pump usually adopts a two-stage steam injection design, having a steam ejector, a spray type condenser, and a bend pipe, etc. Under standard working conditions, the medium pressure steam consumption, the total amount of extracted air, etc. have corresponding indicators, and the final effect vacuum degree needs to reach -93 KPa.

[0004] However, in actual operation, the gas entering the steam jet pump from the atmospheric mixed condenser often carries a large amount of water droplets, which reduces the working efficiency, affects the maintenance of the vacuum degree, and because of the high content of chloride ions in the brine, the concentration of chloride ions in the water droplets is also high, which aggravates the corrosion, shortens the service life of the nozzle, and reduces the overall efficiency of the equipment. CONTENT OF THE UTILITY MODEL

[0005] The technical problem to be solved by the present application is to solve the problems of reduced efficiency, equipment corrosion, and unstable final effect vacuum degree of the steam jet pump caused by water droplets in the inlet gas.

[0006] To solve the above technical problems, the present application provides a novel device for improving the working efficiency of a steam jet pump, which is installed between the steam jet pump inlet and the atmospheric mixed condenser, and comprises a shell, an inlet pipe, an outlet pipe, a lower water pipe, an upper water collecting device, and an equipment support. The inlet pipe is tangent to the shell, and the water droplet-containing gas is introduced into the shell in a tangential direction, the water droplets are thrown to the wall surface under the centrifugal force, and the heavier water droplets are collected and fall. The remaining water droplets in the gas pass through the upper multi-wave water collecting device, which has multiple sine waves on the basis of the arc, and the water droplets are collected multiple times to eliminate the kinetic energy of the water droplets. Finally, the water droplets are collected in the water seal tank to achieve the purpose of gas-liquid separation.

[0007] The present application has the following advantages:

[0008] 1. Reducing the chloride ions in the brine carried by the secondary steam of the final effect, reducing equipment failures and corrosion, enhancing stability and durability, and reducing maintenance costs.

[0009] 2. Improving the non-condensable gas extraction efficiency of the steam jet pump, improving the final effect vacuum degree, and improving the production capacity.

[0010] 3. Economic benefits are obvious, such as spare parts cost saving (nozzle replacement cycle extension), labor cost saving (maintenance frequency reduction), yield increase (salt yield increase). BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a size diagram of the gas-liquid separation device, and the labels are: ① connecting inlet pipeline (DN300), ② connecting outlet pipeline (DN300), ③ connecting downcomer (DN150), and ④ multi-waveform water collecting device.

[0012] Figure 2 is a left view of the gas-liquid separation device.

[0013] Figure 3 is a top view of the gas-liquid separation device.

[0014] Figure 4 is a process flow diagram of installing the gas-liquid separation device, and the labels are: ① non-condensable gas discharged by each effect heat exchange device, ② secondary steam of the last effect, ③ gas-liquid separation device, ④ 1.3 MPa steam, ⑤ circulating cooling water, and ⑥ water seal tank. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings Figures 1-4 Further detailed description of the present application, a new device for improving the working efficiency of the steam jet pump, a new type of gas-water separation device is installed between the steam jet pump inlet and the atmospheric mixed condenser, including inlet pipeline 1, outlet pipeline 2, downcomer 3, multi-waveform water collecting device 4, one end of the inlet pipeline 1 is connected to the atmospheric mixed condenser, the other end is connected to the inside of the device, one end of the outlet pipeline 2 is connected to the inside of the device, the other end is connected to the steam jet pump, one end of the downcomer 3 is used to discharge the collected water droplets, the other end is connected to the external water seal tank, and the multi-waveform water collecting device 4 is installed on the top of the device.

[0016] First, the size of the site space needs to be measured to ensure that the gas-liquid separation device can be accurately installed. Subsequently, according to the mass ratio of water droplets in the non-condensable gas pipeline (DN300) is about 10%, and the space conditions of the site, the cylinder with a diameter of 700mm is selected as the main body of the gas-liquid separation device, in order to effectively remove the water droplets, the gas flow direction needs to be changed and the gas flow rate needs to be slowed down, and at the same time, the multi-waveform water collecting device needs to be stored, therefore, the length of the selected cylinder is about 1100mm, and at the same time, DN150 pipeline is selected as the downcomer to meet the demand of downcomer flow.

[0017] In terms of main material, 316L stainless steel pipe with diameter of 700 mm and thickness of 12 mm is selected. In addition, lathe and plate rolling machine are required to process 9 mm thick stainless steel plate to make the lower cone and top cover of the gas-liquid separation device. Meanwhile, 1 mm thick stainless steel plate is processed into sine wave sheet, and the length is adjusted according to the installation size in the cylinder. If there is error, the sine wave sheet can be cut and polished. The specific size is shown in Table 1. Figure 1 After the combination of the sine wave sheet, the sine wave sheet is fixed by spot welding with the cylinder wall, and the upper and lower parts are fixed by spot welding with flat steel. After the argon arc welding assembly of each part is completed, pressure test is carried out to ensure the sealing property of the device.

[0018] Subsequently, channel steel support is installed to fix the gas-liquid separation device, and inlet pipe (DN300), outlet pipe (DN300) and sewer pipe (DN150) are installed. All pipes are made of stainless steel. After the installation is completed, surface external corrosion treatment is carried out on the device. Finally, the gas-liquid separation device is put into use, and the use effect is closely observed to ensure that the device operates normally and achieves the expected effect.

[0019] The above only describes some embodiments of the present application. It should be noted that those skilled in the art can make some improvements and refinements without departing from the principles of the present application. These improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A novel device for improving the working efficiency of a steam jet pump, characterized in that, A novel gas-water separation device is included, installed between the inlet of a steam jet pump and an atmospheric mixing condenser. The device comprises a shell, an inlet pipe, an outlet pipe, a drain pipe, an upper water collection device, and a support frame. One end of the inlet pipe is connected to the interior of the device and tangential to the shell, while the other end is connected to the atmospheric mixing condenser. One end of the outlet pipe is connected to the interior of the device, while the other end is connected to the steam jet pump. One end of the drain pipe is used to discharge collected water droplets, while the other end is connected to an external water seal tank. The upper water collection device is located on the upper part of the shell and is used to collect residual water droplets in the gas multiple times. The upper water collection device is a multi-waveform water collection device, incorporating multiple sine waves on an arc-shaped base to separate water droplets from the gas.

2. The novel device for improving the working efficiency of a steam jet pump according to claim 1, characterized in that, The housing is made of 316L stainless steel.

3. The novel device for improving the working efficiency of a steam jet pump according to claim 1, characterized in that, The drainage pipe is a DN150 pipe.

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