Sewage pool gas recovery device in hydrogen peroxide production

Abstract

The utility model discloses a sewage pool gas recovery device in hydrogen peroxide production, which is applied to the field of hydrogen peroxide production and comprises a sewage pool, the sewage pool is hermetically arranged, a feed port is arranged on the sewage pool, a first pipeline is arranged on the sewage pool, a gas inlet valve is arranged on the first pipeline, and a gas outlet valve is arranged on the gas inlet valve. An adsorber is arranged at the other end of the first pipeline, the first pipeline is located at the lower end of the adsorber, a GAC adsorbent bed layer is arranged in the adsorber, an outlet valve is arranged at the upper end of the adsorber, a steam ball valve is arranged at the upper end of the adsorber, and a second pipeline is arranged at the lower end of the adsorber. A desorption butterfly valve is arranged on the second pipeline, a tube nest condenser is arranged at the other end of the second pipeline, and by utilizing the porous structure of the GAC adsorbent bed layer, when organic tail gas passes through the adsorbent bed layer, organic matter waste gas in the organic tail gas is adsorbed and intercepted by an adsorbent, so that the waste gas is purified and discharged.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen peroxide production, and particularly relates to a gas recovery device for a sewage pool in hydrogen peroxide production. Background Art

[0002] In the reaction of the oxidation tower in hydrogen peroxide production, the oxygen in the air is partially reacted, and the remaining small amount of oxygen and the nitrogen that cannot participate are discharged from the top of the oxidation tower in large quantities. This part of the gas is called oxidation tail gas. The oxidation tail gas is treated by the oxidation tail gas condenser, expander and tail gas unit and then discharged into the atmosphere. In the treatment process, a large amount of aromatic solvents will be condensed or desorbed.

[0003] The Chinese utility model patent currently announced as: CN215084998U discloses an oxidation residual liquid recovery device for hydrogen peroxide production, which includes an oxidation residual liquid storage tank, an oil-water separator, an oxidation residual liquid recovery tank, a cooler, a resin tower, a filter, and a mixing storage tank that are sequentially connected through pipelines; the above-mentioned arrangement realizes the recovery of hydrogen peroxide in the oxidation residual liquid, avoids directly discharging the residual liquid to sewage treatment, protects the environment, saves resources, and reduces the production cost of hydrogen peroxide. At the same time, by improving the structure of the oil-water separator, the separation of the oil-water mixture in the oxidation residual liquid is accelerated through the action of the centrifugal separation chamber, the efficiency of subsequent recovery of the oxidation residual liquid is improved, and the cost is saved.

[0004] This patent can accelerate the separation of the oil-water mixture in the oxidation residue through the action of the centrifugal separation chamber, improve the efficiency of the subsequent recovery of the oxidation residue, and save costs. However, the device has high aromatic consumption and a strong aromatic odor on site. Utility Model Content

[0005] The utility model aims to provide a gas recovery device for a sewage pool in hydrogen peroxide production, which solves the problems of high aromatic hydrocarbon consumption and strong on-site aromatic hydrocarbon odor in a gas recovery device for a sewage pool in hydrogen peroxide production.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: a gas recovery device for a sewage pool in hydrogen peroxide production, comprising a sewage pool, a sealing arrangement on the sewage pool, a feed port on the sewage pool, a first pipeline on the sewage pool, an air inlet valve on the first pipeline, an adsorber on the other end of the first pipeline, the first pipeline is located at the lower end of the adsorber, a GAC ​​adsorbent bed is arranged inside the adsorber, an outlet valve is arranged at the upper end of the adsorber, a steam ball valve is arranged at the upper end of the adsorber, a second pipeline is arranged at the lower end of the adsorber, a desorption butterfly valve is arranged on the second pipeline, a shell and tube condenser is arranged at the other end of the second pipeline, a third pipeline is arranged on the shell and tube condenser, a gas-liquid separator is arranged at the other end of the third pipeline, a fourth pipeline is arranged on the gas-liquid separator, a spiral plate heat exchanger is arranged at the other end of the fourth pipeline, a fifth pipeline is arranged on the spiral plate heat exchanger, and a stratification tank is arranged at the other end of the fifth pipeline.

[0007] The above technical scheme is adopted, by setting a sewage pool, a feed inlet, a first pipeline, an air inlet valve, an adsorber, a GAC ​​adsorbent bed, an outlet valve, a steam ball valve, a second pipeline, a desorption butterfly valve, a tube condenser, a third pipeline, a gas-liquid separator, a fourth pipeline, a spiral plate heat exchanger, a fifth pipeline and a stratification tank. When in use, the sewage generated in the hydrogen peroxide production process is first discharged into the sewage pool through the feed inlet, and then the air inlet valve is opened to allow the waste gas in the sewage to enter the adsorber through the first pipeline, and the organic waste gas is adsorbed and intercepted by the GAC adsorbent bed in the adsorber, so that the waste gas is purified and discharged, and the tail gas passes through the GAC adsorbent. During the adsorption process of the adsorber, heavy aromatic hydrocarbons are adsorbed by the GAC adsorbent bed, and the gas after adsorption and purification passes through the GAC adsorbent bed and is discharged into the atmosphere. After the adsorber adsorption reaches saturation, desorption is required. When desorption is required, the adsorber air inlet valve and outlet valve are closed, and the desorption butterfly valve and steam ball valve are opened. The steam purges the GAC adsorbent bed from top to bottom in the adsorber, and the purged mixed steam is discharged from the bottom of the adsorber, condensed when passing through the tube condenser, and then separated by the gas-liquid separator and cooled by the spiral plate heat exchanger. The condensed mixed liquid flows into the stratification tank, and the adsorption by the GAC adsorbent bed can reduce the odor of aromatic hydrocarbons on site.

[0008] The utility model is further configured as follows: a sixth pipeline is arranged on the stratification tank, the other end of the sixth pipeline is connected to the first pipeline, and a vortex air pump is arranged on the sixth pipeline.

[0009] By adopting the above technical solution, a sixth pipeline and a vortex air pump are provided, and a small amount of non-condensable gas is pumped into the first pipeline through the sixth pipeline and the vortex air pump to enter the adsorber for re-adsorption.

[0010] The utility model is further configured as follows: an observation window is arranged on the stratification groove, the observation window is made of glass, a liquid level is arranged on the observation window, a liquid outlet pipe is arranged on the stratification groove, and a liquid outlet valve is arranged on the liquid outlet pipe.

[0011] By adopting the above technical solution, an observation window, a liquid level, a liquid outlet pipe and a liquid outlet valve are set. When in use, the observation window can observe the liquid in the stratification tank. When the upper limit of the liquid level is reached, the liquid outlet valve is opened to discharge the liquid through the liquid outlet pipe.

[0012] The utility model is further configured as follows: a drying fan and a drying condenser are arranged on the adsorber.

[0013] By adopting the above technical solution, by setting up a drying fan and a drying condenser, the temperature inside the adsorber is still high and full of water vapor. Such high temperature and humidity are extremely unfavorable for adsorption. The dry air is blown through the drying fan and the drying condenser to dry and cool the GAC adsorbent bed so that effective adsorption can be carried out in the next cycle.

[0014] The utility model is further configured as follows: an intake pre-processor is arranged on the first pipeline.

[0015] By adopting the above technical solution and providing an intake pre-processor, the exhaust gas can be pre-processed by the intake pre-processor when it is adsorbed.

[0016] The utility model is further configured as follows: a grounding plate is provided on the lower surface of the adsorber.

[0017] By adopting the above technical solution and providing a grounding plate, the grounding plate can increase the grounding area of ​​the adsorber during use, thereby improving the stability of the adsorber.

[0018] The utility model is further configured as follows: a support column is arranged on the gas-liquid separator, and an anti-slip pad is arranged on the lower surface of the support column.

[0019] By adopting the above technical solution, by setting a support column and an anti-skid pad, when in use, the support column can support and fix the gas-liquid separator, and then the anti-skid pad can increase the friction between the support column and the ground, further improving the stability of the gas-liquid separator.

[0020] In summary, the utility model has the following beneficial effects:

[0021] By setting a sewage pool, a feed inlet, a first pipeline, an air inlet valve, an adsorber, a GAC ​​adsorbent bed, an outlet valve, a steam ball valve, a second pipeline, a desorption butterfly valve, a tube condenser, a third pipeline, a gas-liquid separator, a fourth pipeline, a spiral plate heat exchanger, a fifth pipeline and a stratification tank, when in use, firstly, the sewage generated in the hydrogen peroxide production process is discharged into the sewage pool through the feed inlet, and then the air inlet valve is opened to allow the waste gas in the sewage to enter the adsorber through the first pipeline, and the organic waste gas is adsorbed and intercepted by the GAC adsorbent bed in the adsorber, so that the waste gas is purified and discharged, and the tail gas passes through the GAC adsorbent bed. During the process, heavy aromatic hydrocarbons are adsorbed by the GAC adsorbent bed, and the gas after adsorption and purification passes through the GAC adsorbent bed and is discharged into the atmosphere. After the adsorber adsorption reaches saturation, desorption is required. When desorption is required, the adsorber air inlet valve and outlet valve are closed, and the desorption butterfly valve and steam ball valve are opened. The steam purges the GAC adsorbent bed from top to bottom in the adsorber, and the purged mixed steam is discharged from the bottom of the adsorber, condensed when passing through the tube condenser, and then separated by the gas-liquid separator and cooled by the spiral plate heat exchanger. The condensed mixed liquid flows into the stratification tank and is adsorbed by the GAC adsorbent bed to reduce the aromatic odor on site.

[0022] By setting up a drying fan and a drying condenser, the temperature inside the adsorber is still high and full of water vapor. Such high temperature and humidity are extremely unfavorable for adsorption. The dry air is blown through the drying fan and the drying condenser to dry and cool the GAC adsorbent bed so that effective adsorption can be carried out in the next cycle.

[0023] Based on the above improvements, the overall technical effect achieved by the device is that it can utilize the porous structure of the GAC adsorbent bed. When the organic tail gas passes through the adsorbent bed, the organic waste gas therein is adsorbed and retained by the adsorbent, thereby purifying the waste gas for discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0025] Figure 2 It is a structural schematic diagram of the adsorber of the utility model;

[0026] Figure 3 The utility model Figure 2 Stereoscopic cross-section at AA in the middle;

[0027] Figure 4 It is a structural schematic diagram of the observation window, liquid level and stratification tank of the utility model.

[0028] In the figure, 1, sewage pool; 2, feed inlet; 3, first pipeline; 4, air inlet valve; 5, adsorber; 6, GAC adsorbent bed; 7, outlet valve; 8, steam ball valve; 9, second pipeline; 10, desorption butterfly valve; 11, shell and tube condenser; 12, third pipeline; 13, gas-liquid separator; 14, fourth pipeline; 15, spiral plate heat exchanger; 16, fifth pipeline; 17, stratification tank; 18, sixth pipeline; 19, vortex air pump; 20, observation window; 21, liquid level; 22, liquid outlet pipe; 23, liquid outlet valve; 24, drying fan; 25, drying condenser; 26, air intake pre-processor; 27, grounding plate; 28, support column; 29, anti-slip mat. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] Example:

[0031] See also Figure 1-Figure 4 The utility model provides a technical solution: a gas recovery device for a sewage pool in hydrogen peroxide production, comprising a sewage pool 1, a sealing arrangement on the sewage pool 1, a feed port 2 on the sewage pool 1, a first pipeline 3 on the sewage pool 1, an air inlet valve 4 on the first pipeline 3, an adsorber 5 on the other end of the first pipeline 3, the first pipeline 3 is located at the lower end of the adsorber 5, a GAC ​​adsorbent bed 6 is arranged inside the adsorber 5, an outlet valve 7 is arranged on the upper end of the adsorber 5, and a steam ball valve is arranged on the upper end of the adsorber 5. 8. A second pipeline 9 is provided at the lower end of the adsorber 5, a desorption butterfly valve 10 is provided on the second pipeline 9, a shell and tube condenser 11 is provided at the other end of the second pipeline 9, a third pipeline 12 is provided on the shell and tube condenser 11, a gas-liquid separator 13 is provided at the other end of the third pipeline 12, a fourth pipeline 14 is provided on the gas-liquid separator 13, a spiral plate heat exchanger 15 is provided at the other end of the fourth pipeline 14, a fifth pipeline 16 is provided on the spiral plate heat exchanger 15, and a stratification tank 17 is provided at the other end of the fifth pipeline 16.

[0032] By setting a sewage pool 1, a feed port 2, a first pipeline 3, an air inlet valve 4, an adsorber 5, a GAC ​​adsorbent bed 6, an outlet valve 7, a steam ball valve 8, a second pipeline 9, a desorption butterfly valve 10, a tube condenser 11, a third pipeline 12, a gas-liquid separator 13, a fourth pipeline 14, a spiral plate heat exchanger 15, a fifth pipeline 16 and a stratification tank 17, when in use, firstly, the sewage generated in the hydrogen peroxide production process is discharged into the sewage pool 1 through the feed port 2, and then the air inlet valve 4 is opened to allow the waste gas in the sewage to enter the adsorber 5 through the first pipeline 3, and the organic waste gas is adsorbed and intercepted by the GAC adsorbent bed 6 in the adsorber 5, so that the waste gas is purified and discharged, and the tail gas passes through the GAC adsorbent. During the adsorption of the adsorber 5, the heavy aromatic hydrocarbons are adsorbed by the GAC adsorbent bed 6, and the gas after adsorption and purification passes through the GAC adsorbent bed 6 and is discharged into the atmosphere. After the adsorber 5 reaches saturation, desorption is required. When desorption is required, the gas inlet valve 4 and the outlet valve 7 of the adsorber 5 are closed, and the desorption butterfly valve 10 and the steam ball valve 8 are opened. The steam purges the GAC adsorbent bed 6 from top to bottom in the adsorber 5, and the purged mixed steam is discharged from the lower part of the adsorber 5, condensed when passing through the tube condenser 11, and then separated by the gas-liquid separator 13 and cooled by the spiral plate heat exchanger 15. The condensed mixed liquid flows into the stratification tank 17, and the adsorption energy of the GAC adsorbent bed 6 can reduce the odor of aromatic hydrocarbons on site.

[0033] refer to Figure 1 A sixth pipeline 18 is arranged on the stratification tank 17, and the other end of the sixth pipeline 18 is connected to the first pipeline 3. A vortex air pump 19 is arranged on the sixth pipeline 18. By arranging the sixth pipeline 18 and the vortex air pump 19, a small amount of non-condensable gas is pumped into the first pipeline 3 through the sixth pipeline 18 and the vortex air pump 19 and enters the adsorber 5 for adsorption again.

[0034] refer to Figure 4 An observation window 20 is provided on the stratification tank 17, and the observation window 20 is made of glass. A liquid level 21 is provided on the observation window 20. A liquid outlet pipe 22 is provided on the stratification tank 17, and a liquid outlet valve 23 is provided on the liquid outlet pipe 22. By setting the observation window 20, the liquid level 21, the liquid outlet pipe 22 and the liquid outlet valve 23, when in use, the observation window 20 can observe the liquid in the stratification tank 17. When the upper limit of the liquid level 21 is reached, the liquid outlet valve 23 is opened to discharge the liquid through the liquid outlet pipe 22.

[0035] refer to Figure 3 The adsorber 5 is provided with a drying fan 24 and a drying condenser 25. By providing the drying fan 24 and the drying condenser 25, the temperature inside the adsorber 5 is still relatively high and is full of water vapor. Such high temperature and humidity are extremely unfavorable for adsorption. The drying wind dries and cools the GAC adsorbent bed 6 through the drying fan 24 and the drying condenser 25, so as to enable effective adsorption in the next cycle.

[0036] refer to Figure 1 An intake pre-processor 26 is provided on the first pipeline 3. By providing the intake pre-processor 26, when the exhaust gas is adsorbed, it can be pre-processed by the intake pre-processor 26.

[0037] refer to Figure 3 A grounding plate 27 is provided on the lower surface of the adsorber 5. By providing the grounding plate 27, when in use, the grounding plate 27 can increase the grounding area of ​​the adsorber 5 and improve the stability of the adsorber 5.

[0038] refer to Figure 1 A support column 28 is provided on the gas-liquid separator 13, and an anti-slip pad 29 is provided on the lower surface of the support column 28. By providing the support column 28 and the anti-slip pad 29, when in use, the support column 28 can support and fix the gas-liquid separator 13, and then the anti-slip pad 29 can increase the friction between the support column 28 and the ground, thereby further improving the stability of the gas-liquid separator 13.

[0039] Brief description of the usage process:

[0040] When in use, first, the sewage generated in the hydrogen peroxide production process is discharged into the sewage pool 1 through the feed port 2, and then the air inlet valve 4 is opened to allow the waste gas in the sewage to enter the adsorber 5 through the first pipeline 3, and the organic waste gas is adsorbed and intercepted by the GAC adsorbent bed 6 in the adsorber 5, so that the waste gas is purified and discharged. In the process of the tail gas passing through the GAC adsorbent bed 6, the heavy aromatic hydrocarbons and the like in the tail gas are adsorbed by the GAC adsorbent bed 6, and the gas after adsorption and purification passes through the GAC adsorbent bed 6 and is discharged into the atmosphere;

[0041] Then, after the adsorber 5 reaches saturation, desorption is required. When desorption is required, the gas inlet valve 4 and the outlet valve 7 of the adsorber 5 are closed, the desorption butterfly valve 10 and the steam ball valve 8 are opened, and the steam is purged from the top to the bottom of the GAC adsorbent bed 6 in the adsorber 5. The purged mixed steam is discharged from the bottom of the adsorber 5, condensed when passing through the tube condenser 11, and then separated by the gas-liquid separator 13 and cooled by the spiral plate heat exchanger 15. The condensed mixed liquid flows into the stratification tank 17, and the adsorption energy of the GAC adsorbent bed 6 can reduce the on-site aromatic odor;

[0042] Then, a small amount of non-condensable gas is pumped into the first pipeline 3 through the sixth pipeline 18 and the vortex air pump 19 to enter the adsorber 5 for further adsorption;

[0043] Then the observation window 20 can observe the liquid in the stratification tank 17. When the upper limit of the liquid level 21 is reached, the liquid outlet valve 23 is opened to discharge the liquid through the liquid outlet pipe 22;

[0044] Finally, the temperature in the adsorber 5 is still high and full of water vapor. Such high temperature and humidity are not conducive to adsorption, so the dry air is blown through the dry fan 24 and the dry condenser 25 to dry and cool the GAC adsorbent bed 6 so that effective adsorption can be carried out in the next cycle.

[0045] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A gas recovery device for a sewage pool in hydrogen peroxide production, comprising a sewage pool (1), characterized in that: The sewage pool (1) is sealed, a feed port (2) is provided on the sewage pool (1), a first pipeline (3) is provided on the sewage pool (1), an air inlet valve (4) is provided on the first pipeline (3), an adsorber (5) is provided at the other end of the first pipeline (3), the first pipeline (3) is located at the lower end of the adsorber (5), a GAC ​​adsorbent bed (6) is provided inside the adsorber (5), an outlet valve (7) is provided at the upper end of the adsorber (5), a steam ball valve (8) is provided at the upper end of the adsorber (5), and a second pipeline (9) is provided at the lower end of the adsorber (5). (9), a desorption butterfly valve (10) is provided on the second pipeline (9), a shell and tube condenser (11) is provided at the other end of the second pipeline (9), a third pipeline (12) is provided on the shell and tube condenser (11), a gas-liquid separator (13) is provided at the other end of the third pipeline (12), a fourth pipeline (14) is provided on the gas-liquid separator (13), a spiral plate heat exchanger (15) is provided at the other end of the fourth pipeline (14), a fifth pipeline (16) is provided on the spiral plate heat exchanger (15), and a stratification tank (17) is provided at the other end of the fifth pipeline (16).

2. A gas recovery device for a sewage pool in hydrogen peroxide production according to claim 1, characterized in that: The stratification tank (17) is provided with a sixth pipeline (18), the other end of the sixth pipeline (18) is connected to the first pipeline (3), and the sixth pipeline (18) is provided with a vortex air pump (19).

3. A gas recovery device for a sewage pool in hydrogen peroxide production according to claim 1, characterized in that: The stratification tank (17) is provided with an observation window (20), the observation window (20) is made of glass, a liquid level (21) is provided on the observation window (20), the stratification tank (17) is provided with a liquid outlet pipe (22), and a liquid outlet valve (23) is provided on the liquid outlet pipe (22).

4. The gas recovery device for sewage pool in hydrogen peroxide production according to claim 1, characterized in that: The adsorber (5) is provided with a drying fan (24) and a drying condenser (25).

5. The gas recovery device for sewage pool in hydrogen peroxide production according to claim 1, characterized in that: An intake air pre-processor (26) is provided on the first pipeline (3).

6. The gas recovery device for sewage pool in hydrogen peroxide production according to claim 1, characterized in that: The lower surface of the adsorber (5) is provided with a grounding plate (27).

7. The gas recovery device for sewage pool in hydrogen peroxide production according to claim 1, characterized in that: A support column (28) is provided on the gas-liquid separator (13), and an anti-slip pad (29) is provided on the lower surface of the support column (28).

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