Organic silicon sewage pool waste gas treatment system

Abstract

An organic silicon sewage pool waste gas treatment system comprises a gas-collecting hood, an outlet pipe of the gas-collecting hood is connected with an inlet pipe of a washing tower, a liquid storage tank at the bottom of the washing tower is communicated with an inlet of a circulating pump, an output end of the circulating pump is connected with the middle of the washing tower, and the top end of the washing tower is communicated with an outlet pipe. The bottom of the degradation pool is connected with a spraying pump and a transfer pump, the output end of the transfer pump is connected with an inlet in the top of the sewage pre-sedimentation tank, the bottom of the sewage pre-sedimentation tank is provided with a sewage pump, the top of the degradation pool is provided with an exhaust pipe communicated with an induced draft fan, and the output end of the induced draft fan is communicated with an exhaust funnel. The equipment is simple in structure, reliable in quality and low in operation cost, and can completely convert waste gas into harmless standard gas to be discharged.

Description

Technical Field

[0001] The utility model belongs to the field of organosilicon waste gas treatment, and relates to a treatment system for treating the waste gas of an organosilicon sewage tank by using a washing and biodegradation method. Background Art

[0002] At present, there are many organosilicon production enterprises, and the production capacity increases year by year. At the same time, a large amount of sewage is produced during the organosilicon production process. Its components are complex. During the sewage treatment process, a large amount of harmful waste gas is generated in the sewage tank, including inorganic and organic waste gases. If these waste gases are directly discharged into the atmosphere without collection and treatment, it will seriously pollute the environment. Currently, common waste gas treatment methods include absorption method, adsorption method, combustion method, masking method, oxidation method, and ion method, etc. Among them, the oxidation method, ion method, and masking method have unstable operations, are difficult to operate and control, have a large amount of equipment maintenance, and often exceed the standards. Generally, they are used as temporary emergency measures and cannot operate stably for a long time. The combustion method has incomplete treatment and a large residual odor, and requires further subsequent treatment. In addition, the adsorption method has good effects and high efficiency, but there are problems of desorption and regeneration, the process is relatively complex, and the operating cost is relatively high. It is generally suitable for special occasions with low concentration and relatively strict treatment requirements and is used as a deep treatment measure. Practice has proved that although the above several methods have certain effects in treating the waste gas of the organosilicon sewage tank, there are still deficiencies and need to be improved. Summary of the Invention

[0003] The present invention solves the problems of a large amount of sewage produced during the organosilicon production process, and a large amount of harmful waste gas generated in the sewage tank during the sewage treatment process, and solves the problem of the long-term stable operation of the organosilicon sewage tank waste gas treatment system.

[0004] To solve the above problems, the present application is achieved through the following technical solutions:

[0005] An organosilicon sewage tank waste gas treatment system includes a gas collection hood. The outlet pipe of the gas collection hood is connected to the inlet pipe of the washing tower. The bottom liquid storage tank of the washing tower is communicated with the inlet of the circulation pump. The output end of the circulation pump is connected to the middle part of the washing tower. The top end of the washing tower is communicated with an outlet pipe, and the other end of the outlet pipe is communicated with the air inlet of the degradation tank. The bottom of the degradation tank is connected with a spray pump and a transfer pump. The output end of the transfer pump is connected to the inlet at the top of the sewage pre-sedimentation tank. A sewage discharge pump is installed at the bottom of the sewage pre-sedimentation tank. A suction pipe is installed at the top of the degradation tank and is communicated with an induced draft fan, and the output end of the induced draft fan is communicated with an exhaust stack.

[0006] The output end of the circulation pump is communicated with a spray device. The spray device is provided with a plurality of non-clogging nozzles, and a packing absorption device is arranged below the spray device.

[0007] The control system of the washing tower is equipped with a first liquid level sensor and a first pH sensor.

[0008] The bottom of the washing tower is provided with a sewage discharge port, and a demisting wire mesh is arranged at the top of the washing tower.

[0009] The bottom of the degradation tank is a biological water tank, in which a mixed solution of bacterial liquid and nutrient solution is contained. A second liquid level sensor and a second pH sensor are installed at the bottom of the biological water tank. The bottom of the biological water tank is connected to a second water tank, and a temperature control device is also installed at the bottom of the degradation tank.

[0010] The output end of the spray pump is connected to a plurality of spiral nozzles at the top of the biodegradation tank.

[0011] The exhaust stack is connected with a monitoring device and communicates with the atmosphere.

[0012] The output end of the spray pump communicates with the spiral nozzles at the top of the degradation tank. A filter layer is installed below the spiral nozzles, and a filter bed is installed below the filter layer. An anti-flushing device is installed inside the filter layer, and the pipes of the anti-flushing device are arranged inside the filter layer and the filter bed.

[0013] The inlet main pipe of the gas collection hood is connected to a number of air extraction branch pipes, and each air extraction branch pipe communicates with the organosilicon sewage tank.

[0014] The bottom of the scrubbing tower also communicates with the first water tank and the medicine tank.

[0015] Preferably, the material of the gas collection hood is fiberglass reinforced plastic.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] 1. This application mainly utilizes the biochemical action of microorganisms to decompose pollutants and convert them into harmless substances. Microorganisms use organic matter as the substrate for their growth and reproduction, and through different conversion pathways, macromolecular organic matter is finally oxidized and decomposed into simple inorganic substances such as water and carbon dioxide through dissimilation. At the same time, through assimilation and using the energy generated during the dissimilation process, the organisms of the microorganisms grow and reproduce, creating favorable conditions for further exerting their treatment ability for organic matter.

[0018] 2. The equipment has a simple structure, reliable quality, low operating cost, and can completely convert waste gas into harmless and up-to-standard gas for emission. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the connection relationship between the scrubbing tower and the circulation pump;

[0021] Figure 3 is a schematic structural diagram of the connection relationship between the degradation tank and the spray pump;

[0022] In the attached drawings: gas collecting hood 1, scrubbing tower 2, inlet pipe 201, packing absorption device 202, spraying device 203, non-clogging nozzle 2031, first liquid level sensor 204, first pH sensor 205, sewage outlet 206, liquid storage tank 207, demisting wire mesh 208, outlet pipe 209, circulation pump 3, degradation tank 4, air inlet 401, biological water tank 402, air extraction pipe 403, spiral nozzle 404, second liquid level sensor 405, second pH sensor 406, filter media layer 407, backwashing device 4071, filter bed 408, temperature control device 409, spraying pump 5, transfer pump 6, sewage pre-sedimentation tank 7, sewage pump 8, induced draft fan 9, exhaust stack 10, first water tank 11, chemical tank 12, second water tank 13, monitoring device 14. Detailed implementation manners

[0023] In this application, the packing absorption device 202, spraying device 203, first liquid level sensor 204, first pH sensor 205, circulation pump 3, second liquid level sensor 405, second pH sensor 406, filter media layer 407, backwashing device 4071, temperature control device 409, spraying pump 5, transfer pump 6, sewage pump 8, induced draft fan 9, monitoring device 14, as well as the inlet valve of the chemical tank for supplementing water and sodium hydroxide are powered by an external power supply. The control module components and execution module components required for the sensors in this system can be purchased and configured through the existing market, and the specific control methods and structural connection relationships will not be further elaborated.

[0024] Embodiment 1

[0025] Please refer to Figures 1 to 3 , the connection methods of each device of this new type are as follows. An exhaust gas treatment system for an organosilicon sewage tank includes a gas collecting hood 1. The outlet pipe of the gas collecting hood 1 is connected to the inlet pipe 201 of the scrubbing tower 2. The liquid storage tank 207 at the bottom of the scrubbing tower 2 is connected to the inlet of the circulation pump 3. The output end of the circulation pump 3 is connected to the middle part of the scrubbing tower 2. The top end of the scrubbing tower 2 is connected to the outlet pipe 209. The other end of the outlet pipe 209 is connected to the air inlet 401 of the degradation tank 4. The bottom of the degradation tank 4 is connected with a spraying pump 5 and a transfer pump 6. One output end of the transfer pump 6 is connected to the inlet at the top of the sewage pre-sedimentation tank 7. The bottom of the sewage pre-sedimentation tank 7 is equipped with a sewage pump 8. The top of the degradation tank 4 is equipped with an air extraction pipe 403 connected to the induced draft fan 9. The output end of the induced draft fan 9 is connected to the exhaust stack 10.

[0026] The output end of the circulation pump 3 is connected to the spraying device 203. The spraying device 203 is provided with a plurality of non-clogging nozzles 2031. The packing absorption device 202 is arranged below the spraying device 203. The control system of the scrubbing tower 2 is equipped with a first liquid level sensor 204 and a first pH sensor 205. The bottom of the scrubbing tower 2 is provided with a sewage outlet 206. The top of the scrubbing tower 2 is provided with a demisting wire mesh 208.

[0027] At the bottom of the degradation tank 4, there is a biological water tank 402. Inside the biological water tank 402, there is a mixed solution of bacterial liquid and nutrient solution. At the bottom of the biological water tank 402, there are a second liquid level sensor 405 and a second pH sensor 406. The bottom of the biological water tank 402 is connected to the second water tank 13. The degradation tank 4 also has a temperature control device 409 at its bottom.

[0028] The output end of the spray pump 5 is connected to a plurality of spiral nozzles 404 at the top of the biodegradation tank 4. The exhaust stack 10 is connected to a monitoring device 14 and is in communication with the atmosphere.

[0029] The output end of the spray pump 5 is connected to the spiral nozzle 404 at the top of the degradation tank 4. Below the spiral nozzle 404, there is a filter layer 407. Below the filter layer 407, there is a filter bed 408. Inside the filter layer 407, there is a backwashing device 4071, and the pipes of the backwashing device 4071 are arranged inside the filter layer 407 and the filter bed 408.

[0030] The inlet main pipe of the gas collection hood 1 is connected to a number of air extraction branch pipes, and each air extraction branch pipe is connected to the silicone sewage tank. The bottom of the washing tower 2 is also connected to the first water tank 11 and the medicine tank 12. Preferably, the material of the gas collection hood 1 is fiberglass reinforced plastic.

[0031] Example 2

[0032] Please refer to Figures 1 to 3 , the operation process of the silicone sewage tank waste gas treatment system includes the following steps:

[0033] Collect the waste gas generated by the silicone sewage tank through the fiberglass reinforced plastic gas collection hood 1. After collection, the waste gas is collected by the air extraction branch pipes into the main pipe and pumped to the washing tower 2.

[0034] The bottom of the washing tower 2 is a liquid storage tank 207. Inside the liquid storage tank 207, there is sodium hydroxide solution, and a circulating pump 3 is provided. The circulating pump 3 pumps the sodium hydroxide solution into the spraying device 203 and evenly sprays it onto the packing layer of the packing absorption device 202 through the non-clogging nozzles 2031. The packing is made of polyhedral hollow ball PP material. The hydrogen sulfide gas in the waste gas is absorbed by the alkali solution, and part of the ammonia gas is dissolved.

[0035] The scrubbing tower 2 is a vertical packed tower. The gas enters the scrubbing tower 2 through the lower inlet pipe 201. Under the power of the induced draft fan 9, it fills the intake section space and then evenly rises to the packing absorption device 202 in the first packing absorption section. On the surface of the packing, the pollutants in the gas phase are absorbed by the liquid phase. The pollutants flow into the liquid storage tank 207 of the scrubbing tower 2 along with the absorption liquid. The gas that is not fully absorbed continues to rise and enters the packing absorption device 202 in the second spray section. In the spray device 203 of the spray section, the absorption liquid is sprayed out at a high speed from the nozzles 2031 of the evenly distributed non-clogging nozzles to form droplets, which are fully mixed and contacted with the gas for continuous absorption. The uppermost part of the tower body of the scrubbing tower 2 is the demisting wire mesh 208, which intercepts the droplets entrained in the gas to prevent the lye from being carried into the degradation tank 4 through the outlet pipe 209. The degradation tank 4 is a biological degradation tank.

[0036] The control system of the scrubbing tower 2 is equipped with a first liquid level sensor 204. When the liquid level in the liquid storage tank 207 is lower than the lower limit of the set value, the inlet valve in the first water tank 11 automatically opens for water replenishment. When the liquid level reaches the upper limit of the set value, the inlet valve in the first water tank 11 automatically closes. This setting can prevent the system from working without liquid. At the same time, it is equipped with a first pH sensor 205. The maximum or minimum pH value can be set through the control system to monitor the pH of the circulating scrubbing liquid in real time. After the circulating scrubbing liquid reacts with the waste gas, the pH of the circulating scrubbing liquid will decrease or increase. After reaching the set value, the medicine tank 12 in the dosing system is connected to supplement the medicine liquid to the circulating scrubbing liquid to adjust the pH within the optimal range, so as to ensure that the circulating scrubbing liquid is always in an effective working state. After the system works for a period of time, a certain amount of sludge will be generated at the bottom of the scrubbing tower 2 and discharged through the sewage outlet 206.

[0037] The gas treated by the scrubbing tower 2 is discharged from the top of the tower body and enters the degradation tank 4, where the degradation tank 4 further removes the residual VOCs (volatile organic compounds) harmful gas in the waste gas.

[0038] The bottom of the degradation tank 4 is equipped with a biological water tank 402. The biological water tank 402 is filled with a mixed liquid of bacterial liquid and nutrient solution, and is equipped with a spray pump 5. The spray pump 5 pumps the mixed liquid into the spray system and evenly sprays it onto the filter material layer 407 through the spiral nozzles 404. The organic matter in the waste gas serves as a nutrient substance, and the microorganisms in the packing layer on the filter bed 408 absorb, metabolize, and utilize the organic matter in the waste gas. The treatment process is as follows:

[0039] When the organic gas containing malodorous substances passes upward from the bottom of the degradation tank 4 through the filter bed 408 and the filter layer 407, the malodorous substances are transferred from the gas phase to the water-microorganism mixed phase and decomposed by the metabolic action of the microorganisms attached to the filter material. This method mainly utilizes the biochemical action of microorganisms to decompose pollutants and convert them into harmless substances. Microorganisms use organic matter as the substrate for their growth and reproduction, and through different transformation pathways, macromolecular organic matter is finally oxidized and decomposed into simple inorganic substances such as water and carbon dioxide through dissimilation. At the same time, through assimilation and using the energy generated during the dissimilation process, the organisms of the microorganisms grow and reproduce, creating favorable conditions for further exerting their treatment ability for organic matter.

[0040] The treatment process of the degradation tank 4 includes the following three stages:

[0041] The first stage: The odor contacts with water and dissolves in water;

[0042] The second stage: The malodorous components in the aqueous solution are absorbed and adsorbed by microorganisms, and the malodorous components are transferred from the water into the microorganisms;

[0043] The third stage: The malodorous components entering the microbial cells are decomposed and utilized by the microorganisms as nutrients, so that the pollutants can be removed.

[0044] The degradation tank 4 is equipped with a second liquid level sensor 405. When the liquid level in the tank is lower than the set lower limit value, the inlet valve of the second water tank 13 automatically opens for water replenishment. When the liquid level reaches the set upper limit value, the inlet valve in the second water tank 13 automatically closes. This setting can prevent the system from working without liquid. It is equipped with a spray system, including a spiral nozzle 404 and a pipeline system; it is equipped with a pH sensor to monitor the pH value of the spray liquid in real time to ensure it is neutral; the degradation tank 4 is equipped with a temperature control device 409 heated by steam, which automatically raises the temperature when it is lower than 5°C to ensure the suitable growth temperature of the microorganisms; the filter layer 407 is equipped with a backwashing device 4071, and the pipeline of the backwashing device 4071 is arranged inside the filter material layer 407 and the filter bed 408. The pipeline of the backwashing device 4071 is provided with multiple holes to flush the sludge on the packing to increase air permeability. The transfer pump 6, the sewage pre-sedimentation tank 7, and the sewage discharge pump 8 are used to flush and discharge sewage regularly to prevent the filter material layer 407 and the filter bed 408 from being blocked. The spiral nozzle 404 is a stainless steel non-blocking spiral nozzle.

[0045] The gas treated by the degradation tank 4 is pumped to the exhaust stack 10 by the induced draft fan 9. The exhaust stack 10 is equipped with a standard sampling port and a monitoring device 14. The monitoring device 14 is an on-line monitoring device.

[0046] After the organic silicon sewage tank waste gas is treated qualified through the above steps, it is discharged up to the standard. In the scrubbing tower 2 of this application, the tower body is provided with two layers of packing absorption devices 202 and two layers of spraying devices 203, and multiple layers of packing absorption devices 202 and multiple layers of spraying devices 203 can also be provided according to needs.

Claims

1. An organic silicon sewage tank waste gas treatment system, including a gas collection hood (1), characterized in that, The outlet pipe of the air collecting hood (1) is connected to the inlet pipe (201) of the scrubbing tower (2). The bottom liquid storage tank (207) of the scrubbing tower (2) is communicated with the inlet of the circulation pump (3). The output end of the circulation pump (3) is connected to the middle part of the scrubbing tower (2). The top end of the scrubbing tower (2) is communicated with the outlet pipe (209). The other end of the outlet pipe (209) is communicated with the air inlet (401) of the degradation tank (4). The bottom of the degradation tank (4) is connected with a spray pump (5) and a transfer pump (6). The output end of the transfer pump (6) is connected to the inlet at the top of the sewage pre-sedimentation tank (7). The bottom of the sewage pre-sedimentation tank (7) is equipped with a sewage discharge pump (8). The top of the degradation tank (4) is equipped with an air extraction pipe (403) communicated with an induced draft fan (9). The output end of the induced draft fan (9) is communicated with the exhaust stack (10).

2. The silicone sewage tank waste gas treatment system according to claim 1, characterized in that, The output end of the circulation pump (3) is communicated with a spray device (203). The spray device (203) is provided with a plurality of non-clogging nozzles (2031). A packing absorption device (202) is arranged below the spray device (203).

3. An organosilicon sewage tank waste gas treatment system according to claim 1, characterized in that, The control system of the scrubbing tower (2) is equipped with a first liquid level sensor (204) and a first pH sensor (205).

4. An organosilicon sewage tank waste gas treatment system according to claim 1, characterized in that, The bottom of the scrubbing tower (2) is provided with a sewage discharge port (206). A demisting wire mesh (208) is arranged at the top of the scrubbing tower (2).

5. The organic silicon sewage tank waste gas treatment system according to claim 1, characterized in that, The bottom of the degradation tank (4) is a biological water tank (402). The bottom of the biological water tank (402) is equipped with a second liquid level sensor (405) and a second pH sensor (406). The bottom of the biological water tank (402) is communicated with a second water tank (13). The bottom of the degradation tank (4) is also equipped with a temperature control device (409).

6. The silicone sewage tank waste gas treatment system according to claim 1, characterized in that The output end of the spray pump (5) is connected to a plurality of spiral nozzles (404) at the top of the biological degradation tank (4).

7. An organosilicon sewage tank waste gas treatment system according to claim 1, characterized in that, The exhaust stack (10) is connected with a monitoring device (14). The exhaust stack (10) is communicated with the atmosphere.

8. An organosilicon sewage tank waste gas treatment system according to claim 1, characterized in that, The output end of the spray pump (5) is communicated with the spiral nozzles (404) at the top of the degradation tank (4). A filter material layer (407) is arranged below the spiral nozzles (404). A filter bed (408) is arranged below the filter material layer (407). An anti-flushing device (4071) is arranged inside the filter material layer (407). The pipeline of the anti-flushing device (4071) is arranged inside the filter material layer (407) and the filter bed (408).

9. An organosilicon sewage tank waste gas treatment system according to claim 1, characterized in that, The inlet main pipe of the air collecting hood (1) is connected with a number of air extraction branch pipes. Each air extraction branch pipe is communicated with a silicone sewage tank.

10. The organic silicon sewage tank waste gas treatment system according to claim 1, characterized in that, The bottom of the scrubbing tower (2) is also communicated with a first water tank (11) and a medicine tank (12).

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