Cooling and dewatering device for hydrogen treatment

Abstract

The utility model discloses a cooling and dewatering device for hydrogen treatment, which comprises a hydrogen washing tower, a hydrogen compressor, a hydrogen cooler A, a hydrogen water mist catcher A, a hydrogen cooler B and a hydrogen water mist catcher B. The hydrogen washing tower comprises a packing layer and a baffle plate, and hydrogen and water are in sufficient reverse contact. The tube pass of the hydrogen cooler A and the tube pass of the hydrogen cooler B are 7-degree water and 0-degree water respectively, a self-cleaning filter is used for filtering impurities in the 7-degree water at the water inlet of the hydrogen cooler A of the system, the equipment cleaning frequency is reduced, drainage time is controlled by drainage timers at the lower parts of the hydrogen water mist catcher A and the hydrogen water mist catcher B, the stability of the hydrogen system is controlled, and the service life of the hydrogen system is prolonged. The device reduces the water content of hydrogen, reduces the frequency of shutdown maintenance of the system, improves the safety coefficient of production, and reduces the labor intensity of operators.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and in particular relates to a hydrogen treatment cooling and water removal device. Background Art

[0002] In the production process of the chlor-alkali industry, the wet hydrogen at 80-85℃ from the electrolysis section enters the lower part of the hydrogen washing tower and is countercurrently contacted with the cooling water sprayed from the upper part of the tower for washing and cooling to ≤45℃. The hydrogen coming out of the top of the tower enters the hydrogen compressor for pressurization, enters the cooler for cooling to 10-25℃, and is dehydrated by the hydrogen water mist separator before being transported to the synthetic hydrochloric acid process. In the hydrogen cooler, it is indirectly in contact with the cooling medium. The cooled hydrogen enters the water mist collector to capture the water mist and is then sent to the synthetic hydrochloric acid process. The dehydration process is realized in the hydrogen cooler and the hydrogen water mist collector. Since the existing 7℃ water temperature is unstable, it can reach up to 18℃ in summer, resulting in the temperature of the cooled hydrogen exceeding 25℃. According to the dew point (water content) of hydrogen (0℃=4.265g / m 3 , 10℃=9.395g / m 3 , 20℃=17.22g / m 3 ); It can be seen that in summer when the water temperature is 7℃, the hydrogen temperature is 25℃, and the water content of hydrogen will be as high as 27g / m 3 The water content of hydrogen at 10°C is 9.395 g / m 3 The excessive water content in hydrogen leads to serious scaling of the lamp holder of the hydrochloric acid synthesis furnace, which requires frequent cleaning and the hydrogen mist collector is not effective. Summary of the invention

[0003] The utility model overcomes the shortcomings of the prior art and provides a hydrogen treatment cooling and water removal device, which reduces the water content of hydrogen, thereby reducing the frequency of scaling and cleaning of the lamp cap of the downstream hydrochloric acid synthesis furnace.

[0004] The utility model provides the following technical scheme: a hydrogen treatment cooling and water removal device, comprising a hydrogen scrubbing tower, a hydrogen compressor, a hydrogen cooler A, a hydrogen water mist collector A, a hydrogen cooler B, and a hydrogen water mist collector B connected in sequence, wherein a packing layer and a baffle are arranged inside the hydrogen scrubbing tower, the bottoms of the hydrogen water mist collector A and the hydrogen water mist collector B are connected to a cooling water tank through a drain pipe, the upper part of the hydrogen cooler A is provided with a water inlet A, the lower part of the hydrogen cooler A is provided with a water outlet A, the upper part of the hydrogen cooler B is provided with a water inlet B, the lower part of the hydrogen cooler B is provided with a water outlet B, and the water inlet A of the hydrogen cooler A is provided with a self-cleaning filter.

[0005] Furthermore, the packing layer is above the baffle.

[0006] Furthermore, the hydrogen scrubbing tower is provided with a liquid inlet pipe, an air inlet pipe and a liquid discharge pipe. A spray head is provided above the packing layer, and the liquid inlet pipe is connected with the spray head. The air inlet pipe passes through the side wall of the hydrogen scrubbing tower and extends into the interior, and is arranged below the baffle. The liquid discharge pipe is arranged at the lower part of the hydrogen scrubbing tower.

[0007] Furthermore, a drain valve A and a drain valve B are respectively provided on the drain pipe.

[0008] Furthermore, a drainage timer A is provided at the bottom of the hydrogen water mist collector A, and a drainage timer B is provided at the bottom of the hydrogen water mist collector B.

[0009] Furthermore, the hydrogen water mist collector A is provided with a liquid level meter A, and the hydrogen water mist collector B is provided with a liquid level meter B.

[0010] Furthermore, the cooling water tank is provided with a nitrogen pipe, a vent pipe and a pressure gauge, and the vent pipe is provided with a breathing valve.

[0011] Furthermore, a drainage level gauge is provided at the lower portion of the cooling water tank.

[0012] Furthermore, the drain valve A is electrically connected to the drain timer A, and the drain valve B is electrically connected to the drain timer B.

[0013] Furthermore, the water discharged from the drain pipe is recycled after being cooled.

[0014] Beneficial effects of the utility model:

[0015] 1. The hydrogen cooler A of the utility model uses 7° water cooling, and the hydrogen cooler B uses 0° water, so that the temperature of hydrogen is stably controlled at 10-12°C, the water content of hydrogen is reduced to the greatest extent, and the water content brought into the hydrochloric acid synthesis furnace by hydrogen is reduced. In addition, the hydrogen washing tower uses fillers and baffle-type hydrogen washing towers to make water and hydrogen fully contact, and the alkali and salt entrained in the hydrogen are taken away by water, thereby reducing the scaling frequency of the synthesis furnace lamp holder, reducing the number of times the synthesis furnace is stopped to clean the lamp holder, and improving the safe operation cycle of the system.

[0016] 2. The utility model uses a drainage timer to set the drainage time to remind the operator to close the drainage valve, thereby improving the safety factor and stabilizing the pressure of the hydrogen system.

[0017] 3. The utility model uses a 7° water self-cleaning filter, and the cooling water is filtered through the 7° water self-cleaning filter, which reduces the cleaning and maintenance frequency of the equipment and saves production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the utility model;

[0019] In: 1. Hydrogen scrubber; 2. Hydrogen compressor; 3. Hydrogen cooler A; 4. Hydrogen mist collector A; 5. Hydrogen cooler B; 6. Hydrogen mist collector B; 7. Cooling water tank; 8. Liquid inlet pipe; 9. Sprinkler head; 10. Air inlet pipe; 11. Liquid discharge pipe; 12. Packing layer; 13. Baffle; 14. Water inlet A; 15. Water outlet A; 16. Water inlet B; 17. Water outlet B; 18. Liquid level gauge A; 19. Liquid level gauge B; 20. Drain timer A; 21. Drain timer B; 22. Drain valve A; 23. Drain valve B; 24. Vent pipe; 25. Nitrogen pipe; 26. Drain pipe; 27. Breathing valve; 28. Pressure gauge; 29. ​​Drain level gauge; 30. Self-cleaning filter; a. Hydrogen. Implementation

[0020] like Figure 1 As shown, a hydrogen treatment cooling and water removal device comprises a hydrogen scrubber 1, a hydrogen compressor 2, a hydrogen cooler A3, a hydrogen mist collector A4, a hydrogen cooler B5, and a hydrogen mist collector B6 which are connected in sequence. A packing layer 12 and a baffle 13 are arranged inside the hydrogen scrubber, and the packing layer 12 is above the baffle 13. The hydrogen scrubber 1 is provided with a liquid inlet pipe 8, an air inlet pipe 10, and a liquid discharge pipe 11. The water discharged from the liquid discharge pipe 11 is recycled after cooling treatment. A spray head 9 is arranged above the packing layer 12, and the liquid inlet pipe 8 is connected to the spray head 9; the air inlet pipe 10 passes through the side wall of the hydrogen scrubber 1 and extends into the interior, and is arranged below the baffle 13; the liquid discharge pipe 11 is arranged at the lower part of the hydrogen scrubber 1; the bottoms of the hydrogen mist collector A4 and the hydrogen mist collector 6B are connected to the cooling water tank 7 through a drain pipe 26, and the cooling water tank 7 is provided with a nitrogen pipe 25, a vent pipe 24 and A pressure gauge 28, a breathing valve 27 is provided in the vent pipe 24, a drainage level gauge 29 is provided at the lower part of the cooling water tank 7, a drainage timer A20 is provided at the lower part of the hydrogen water mist collector A4, a drainage timer B21 is provided at the lower part of the hydrogen water mist collector B6, a liquid level gauge A18 is provided in the hydrogen water mist collector A4, and a liquid level gauge B19 is provided in the hydrogen water mist collector B6. A drainage valve A22 and a drainage valve B23 are respectively provided on the drainage pipe 26, the drainage valve A22 is electrically connected to the drainage timer A20, and the drainage valve B23 is electrically connected to the drainage timer B21. A water inlet A14 is provided at the upper part of the hydrogen cooler A3, a water outlet A15 is provided at the lower part of the hydrogen cooler A3, a water inlet B16 is provided at the upper part of the hydrogen cooler B5, a water outlet B17 is provided at the lower part of the hydrogen cooler B5, and a self-cleaning filter 30 is provided at the water inlet A14 of the hydrogen cooler A3.

[0021] Working process:

[0022] When using this embodiment, the high-temperature wet hydrogen from the electrochlorine electrolysis enters the hydrogen scrubber 1 through the air inlet pipe 10, and the liquid inlet pipe 8 sprays the washing water into the hydrogen scrubber through the spray head 9. The hydrogen a contacts the washing water in reverse to reduce the temperature and remove the salt and alkali entrained in the hydrogen. The washed water is collected in the lower part of the hydrogen scrubber 1. The washing water is discharged by the liquid discharge pipe 11 and then cooled to ≤40°C and continued to be washed with a small amount of pure water in the hydrogen scrubber 1. The hydrogen coming out of the top of the hydrogen scrubber 1 enters the hydrogen compressor 2 for compression and first enters the hydrogen cooler A3. The hydrogen cooler A is a shell-and-tube heat exchanger. The hydrogen introduced into the shell side is heat exchanged with the 7° water introduced into the tube side. The heat-exchanged hydrogen passes through the hydrogen mist collector A4 to remove the water entrained in the hydrogen. The hydrogen then enters the hydrogen cooler B5. The hydrogen introduced into the shell side is compressed by the hydrogen compressor 2 and then enters the hydrogen cooler A3. The hydrogen cooler A is a shell-and-tube heat exchanger. The hydrogen introduced into the shell side is heat exchanged with the 7° water introduced into the tube side. The hydrogen after heat exchange ... After heat exchange with the 0° water introduced into the pipe, the hydrogen after heat exchange passes through the hydrogen mist collector B6 to remove the water entrained in the hydrogen. The operator opens the drain valve A22 and the drain valve B23 according to the liquid level gauges A17 and B18 of the hydrogen mist collector A4 and the hydrogen mist collector B6, and the drain timer A20 and the drain timer B21 start timing. After the set time, the drain valve A22 and the drain valve B23 are automatically closed, and the cooling water enters the cooling water tank 7 through the drain pipe 26. Nitrogen is introduced into the upper part of the cooling water tank 7 through the nitrogen pipe 25 to prevent accumulation, the vent pipe 24 discharges nitrogen, and the breathing valve 27 prevents air from entering the cooling water tank 7. The new use method better solves the problems of hydrogen containing water, unstable system pressure caused by drainage, and frequent shutdown to clean the synthesis furnace lamp holder, while improving the safety factor of the entire system.

Claims

1. A hydrogen treatment cooling and water removal device, characterized in that: The invention comprises a hydrogen scrubber, a hydrogen compressor, a hydrogen cooler A, a hydrogen mist collector A, a hydrogen cooler B and a hydrogen mist collector B which are connected in sequence. A packing layer and a baffle are arranged inside the hydrogen scrubber. The bottoms of the hydrogen mist collector A and the hydrogen mist collector B are connected to a cooling water tank through a drain pipe. A water inlet A is arranged at the top of the hydrogen cooler A and a water outlet A is arranged at the bottom of the hydrogen cooler A. A water inlet B is arranged at the top of the hydrogen cooler B and a water outlet B is arranged at the bottom of the hydrogen cooler B. A self-cleaning filter is arranged at the water inlet A of the hydrogen cooler A.

2. A hydrogen treatment cooling and water removal device as claimed in claim 1, characterized in that: The packing layer is above the baffles.

3. A hydrogen treatment cooling and water removal device as claimed in claim 1 or 2, characterized in that: The hydrogen scrubbing tower is provided with a liquid inlet pipe, an air inlet pipe and a liquid discharge pipe. A spray head is provided above the packing layer, and the liquid inlet pipe is connected with the spray head. The air inlet pipe passes through the side wall of the hydrogen scrubbing tower and extends into the interior, and is arranged below the baffle. The liquid discharge pipe is arranged at the lower part of the hydrogen scrubbing tower.

4. A hydrogen treatment cooling and water removal device as claimed in claim 1, characterized in that: The drain pipe is provided with a drain valve A and a drain valve B respectively.

5. A hydrogen treatment cooling and water removal device as claimed in claim 1, characterized in that: A drainage timer A is provided at the lower portion of the hydrogen water mist collector A, and a drainage timer B is provided at the lower portion of the hydrogen water mist collector B.

6. A hydrogen treatment cooling and water removal device as claimed in claim 1, characterized in that: The hydrogen water mist collector A is provided with a liquid level meter A, and the hydrogen water mist collector B is provided with a liquid level meter B.

7. A hydrogen treatment cooling and water removal device as claimed in claim 1, characterized in that: The cooling water tank is provided with a nitrogen pipe, a vent pipe and a pressure gauge, and the vent pipe is provided with a breathing valve.

8. A hydrogen treatment cooling and water removal device as claimed in claim 1, characterized in that: A drainage level gauge is provided at the lower part of the cooling water tank.

9. A hydrogen treatment cooling and water removal device as claimed in claim 4, characterized in that: The drain valve A is electrically connected to the drain timer A, and the drain valve B is electrically connected to the drain timer B.

10. A hydrogen treatment cooling and water removal device as claimed in claim 3, characterized in that: The water discharged from the drain pipe is recycled after being cooled.

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