CN220090973U - Acid waste gas recycling system - Google Patents
Acid waste gas recycling system Download PDFInfo
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- CN220090973U CN220090973U CN202321113566.6U CN202321113566U CN220090973U CN 220090973 U CN220090973 U CN 220090973U CN 202321113566 U CN202321113566 U CN 202321113566U CN 220090973 U CN220090973 U CN 220090973U
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- pipeline
- spray tower
- waste gas
- alkali spray
- acid
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- 239000002253 acid Substances 0.000 title claims abstract description 75
- 239000002912 waste gas Substances 0.000 title claims abstract description 52
- 238000004064 recycling Methods 0.000 title claims abstract description 26
- 239000007788 liquid Substances 0.000 claims abstract description 77
- 239000003513 alkali Substances 0.000 claims abstract description 72
- 239000007921 spray Substances 0.000 claims abstract description 68
- 239000007789 gas Substances 0.000 claims abstract description 64
- 238000011084 recovery Methods 0.000 claims abstract description 19
- 239000002699 waste material Substances 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
- 238000001035 drying Methods 0.000 claims description 26
- 239000000428 dust Substances 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 18
- 238000003860 storage Methods 0.000 claims description 16
- 239000003814 drug Substances 0.000 claims description 15
- 239000006096 absorbing agent Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 description 26
- 238000000034 method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000006386 neutralization reaction Methods 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 241000282414 Homo sapiens Species 0.000 description 2
- 239000012670 alkaline solution Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model relates to an acid waste gas recycling system, which relates to the field of waste gas treatment and comprises a first alkali spray tower and a recycling pool, wherein an acid gas inlet pipe is arranged at an air inlet of the first alkali spray tower, a fan is arranged on the acid gas inlet pipe, and a secondary treatment unit is arranged at an air outlet of the first alkali spray tower; the liquid outlet at the bottom of the first alkali spray tower is communicated with the recovery tank through a pipeline, and a waste liquid circulating unit is arranged between the recovery tank and the liquid inlet at the top of the first alkali spray tower. The utility model carries out multistage treatment on the waste gas, achieves the emission standard and has good purifying effect.
Description
Technical Field
The utility model relates to the field of waste gas treatment, in particular to an acid waste gas recycling system.
Background
Along with the shortage of energy, resource shortage and serious environmental pollution, environmental protection has become a global problem and is concerned by all people in the whole society. A large amount of acid waste gas is generated in the industrial production process, and the direct discharge not only wastes resources and pollutes the environment, but also threatens the health of human beings. In order to protect the environment and the survival of human beings from being influenced, and to reasonably recycle resources, the method has economic benefit and social benefit while generating environmental protection benefit, and is essential to recycle the acid waste liquid.
At present, the means for purifying the acid waste gas at home and abroad mainly comprise an adsorption method and a chemical method, wherein the adsorption method utilizes the characteristics of unbalanced and unsaturated molecular attraction or chemical bond force of adsorbents such as activated carbon and the like to capture gaseous molecules, so that gas pollutants are concentrated and adsorbed on the surface of the activated carbon, and therefore waste gas purification is realized. The chemical method is to utilize the acid-base neutralization principle to realize the purification of waste gas, such as an alkali spray tower treatment process, and utilize a fan and a nozzle which are operated at high speed to fully atomize the absorption liquid, so as to enlarge the contact area between the absorption liquid and the acid waste gas, achieve the aim of purification, and enable the waste gas to be directly discharged after being purified and reaching the discharge standard.
Because the alkali spray tower has high purification efficiency, economy and feasibility, mature technology and good stability, the alkali spray tower is generally selected for purifying acid gas at present. However, as the discharge amount of the acid waste gas in the production process is continuously changed and the spraying amount of the alkaline solution is constant, when the discharge amount of the acid waste gas is smaller, the alkaline solution is wasted, and meanwhile, the electric energy is wasted; when the exhaust emission is large, the acid gas cannot be effectively neutralized, the emission standard cannot be met, and the air pollution is caused, so that the exhaust treatment effect is not ideal.
Disclosure of Invention
The utility model aims to provide an acid waste gas recycling system so as to solve the problem of unstable acid waste gas treatment.
In order to solve the technical problems, the utility model adopts the following technical scheme:
an acid waste gas recycling system comprises a first alkali spray tower and a recycling pool, wherein an acid gas inlet pipe is arranged at an air inlet of the first alkali spray tower, a fan is arranged on the acid gas inlet pipe, and a secondary treatment unit is arranged at an air outlet of the first alkali spray tower; the liquid outlet at the bottom of the first alkali spray tower is communicated with the recovery tank through a pipeline, and a waste liquid circulating unit is arranged between the recovery tank and the liquid inlet at the top of the first alkali spray tower.
Optionally, the secondary treatment unit comprises an acid gas concentration detection device, and an exhaust gas secondary treatment device and a drying dust removal device which are arranged in series, wherein the exhaust gas secondary treatment device is used for recycling unqualified exhaust gas again, and the drying dust removal device is used for drying and removing dust from qualified exhaust gas; the exhaust port of the first alkali spray tower is provided with an exhaust gas discharge pipeline, an induced draft fan is arranged on the exhaust gas discharge pipeline, the acid gas concentration detection device is arranged on the exhaust gas discharge pipeline, the exhaust gas discharge pipeline is communicated with the exhaust gas secondary treatment device through a first pipeline, the exhaust gas discharge pipeline is communicated with the drying and dust removing device through a second pipeline, and valves are arranged on the first pipeline and the second pipeline.
Optionally, the waste liquid circulation unit includes treatment tank and dosing system, and the inlet of treatment tank and first alkali spray column passes through the feed liquor pipeline intercommunication, is equipped with control valve and liquid pump on the feed liquor pipeline, and control valve and acid gas concentration detection device electric connection.
Optionally, the liquid pump is an alkali-resistant pump.
Optionally, the dosing system includes PH detector, medicine storage tank and flow valve, and PH detector installs in handling the pond, through advancing the medicine pipeline intercommunication between medicine storage tank and the handling pond, and flow valve establishes on advancing the medicine pipeline, control valve and PH detector electric connection.
Optionally, the waste gas secondary treatment device comprises a second alkali spray tower, a liquid inlet of the second alkali spray tower is communicated with a liquid inlet pipeline, and a connecting pipeline is arranged between a liquid outlet of the second alkali spray tower and the recovery tank; the air inlet of the second alkali spray tower is communicated with the first pipeline, and the air outlet of the second alkali spray tower is communicated with the air inlet of the drying and dust removing device.
Optionally, a storage tank is arranged between the treatment tank and the second alkali spray tower, and the liquid inlet pipeline is communicated with the storage tank.
Optionally, the drying dust-removing device comprises an activated carbon absorber, an exhaust port of the second alkali spray tower is communicated with an air inlet of the activated carbon absorber through an air inlet pipeline, and an induced draft fan is arranged on the air inlet pipeline.
Optionally, the drying and dedusting device further comprises a filter, and the filter is arranged on the air inlet pipeline.
Compared with the prior art, the acid waste gas recycling system provided by the utility model has the following beneficial technical effects:
1. the acid waste gas enters the first alkali spray tower from the acid gas inlet pipe through the induced draft fan to carry out neutralization reaction with the absorption liquid, after being discharged, the acid waste gas which does not reach the discharge standard is detected by the acid gas concentration detection device to be discharged after passing through the waste gas secondary treatment device and the drying dust removal device, and the acid waste gas which reaches the discharge standard is directly discharged after passing through the drying dust removal device;
2. the absorption liquid is concentrated in the recovery tank for treatment after passing through the first alkali spray tower, and then is pumped into the first alkali spray tower and the second alkali spray tower for recycling, and the dosing system has the effects of automatically checking the acid-base property of the absorption liquid and automatically adding liquid medicine according to the concentration of the neutralization liquid, so that the absorption liquid is kept in a certain alkaline state, and the phenomena of uneven treatment effect, missed treatment and the like caused by deviation of the neutralization liquid of waste gas are reduced.
Drawings
FIG. 1 is a schematic flow chart of an embodiment of the utility model.
Reference numerals: 1. a first alkali spray tower; 110. an acid gas inlet pipe; 120. an exhaust gas discharge pipe; 2. a recovery pool; 3. an induced draft fan; 4. an acid gas concentration detection device; 5. a second alkali spray tower; 51. a connecting pipe; 52. an air intake duct; 6. a drying and dust removing device; 61. an activated carbon adsorber; 62. a filter; 7. a first pipe; 8. a second pipe; 9. a valve; 10. a treatment pool; 101. a liquid inlet pipe; 102. a control valve; 103. a liquid pump; 11. a dosing system; 111. a PH detector; 112. a drug storage tank; 113. a flow valve; 14. a medicine inlet pipeline; 15. and a storage tank.
Detailed Description
The present utility model will be described in further detail with reference to fig. 1.
The embodiment of the utility model discloses an acid waste gas recycling system, which comprises a first alkali spray tower 1 and a recycling pool 2, and is characterized in that the system is shown in fig. 1. The top of the first alkali spray tower 1 is provided with an air outlet and a liquid inlet, the bottom of the first alkali spray tower is provided with an air inlet and a liquid outlet, and acid waste gas is recycled in a countercurrent mode. An acid gas inlet pipe 110 is arranged at the air inlet of the first alkali spray tower 1, an induced draft fan 3 is arranged on the acid gas inlet pipe 110, and a secondary treatment unit is arranged at the air outlet of the first alkali spray tower 1; the bottom liquid outlet of the first alkali spray tower 1 is communicated with the recovery tank 2 through a pipeline, a valve 9 and a water pump are arranged on the pipeline, and a waste liquid circulation unit is arranged between the recovery tank 2 and the top liquid inlet of the first alkali spray tower 1. The acid gas enters the first alkali spray tower 1 through the induced draft fan 3 and then reacts with the absorption liquid, and the absorption liquid after the reaction enters the recovery tank 2 through a pipeline for recovery treatment.
The secondary treatment unit comprises an acid gas concentration detection device 4, and an exhaust gas secondary treatment device and a drying dust removal device 6 which are arranged in series, wherein the exhaust gas secondary treatment device is used for recycling unqualified exhaust gas again, and the drying dust removal device 6 is used for drying and dust removal of qualified exhaust gas. The acid gas concentration detection means 4 may be selected according to the components in the acid gas in the actual treatment process. After the acid gas reacted with the absorption liquid is detected by the acid gas concentration detection device 4, the acid waste gas reaching the emission standard enters the drying and dust removing device 6 to treat a small amount of water mist and water vapor and then is directly discharged. The acid waste gas which does not reach the emission standard sequentially passes through the waste gas secondary treatment device and the drying dust removal device 6 and is discharged, so that the acid waste gas treatment effect is improved, and the environmental pollution is reduced.
The exhaust port of the first alkali spray tower 1 is provided with an exhaust gas discharge pipeline 120, the acid gas concentration detection device 4 is arranged on the exhaust gas discharge pipeline 120, the exhaust gas secondary treatment device comprises a second alkali spray tower 5, the exhaust gas discharge pipeline 120 is communicated with the second alkali spray tower 5 through a first pipeline 7, the exhaust gas discharge pipeline 120 is communicated with a drying and dust removing device 6 through a second pipeline 8, valves 9 and induced draft fans 3 are arranged on the first pipeline 7 and the second pipeline 8, the valves 9 are selected from the existing automatic control valves, the controller is electrically connected with the acid gas concentration detection device 4, whether the acid gas reaches the discharge standard is judged through the acid gas concentration detection device 4, information is fed back to the valves 9 on the first pipeline 7 and the second pipeline 8, and the valves 9 on the second pipeline 8 are controlled to switch.
The liquid inlet of the second alkali spray tower 5 is provided with a liquid inlet pipeline 101 communicated with the waste liquid circulation unit, and a connecting pipeline 51 communicated with the waste liquid circulation unit is arranged between the liquid outlets of the second alkali spray tower 5. The waste liquid circulation unit comprises a treatment tank 10 and a dosing system 11, the treatment tank 10 is communicated with a liquid inlet of the first alkali spray tower 1 through a liquid inlet pipeline 101, and used absorption liquid is recovered to have absorption capacity after passing through the dosing system 11 in the recovery tank 2, and enters the first alkali spray tower 1 and the second alkali spray tower 5 through the liquid inlet pipeline 101 for recycling. The liquid inlet pipeline 101 is provided with a control valve 102 and a liquid pump 103, the liquid pump 103 is an alkali-resistant pump, and the control valve 102 is electrically connected with the acid gas concentration detection device 4. The switch of the control valve 102 on the liquid inlet pipe is changed through the information feedback of the acid gas concentration detection device 4, so that the liquid inlet amount of the absorption liquid is controlled, and the waste of the absorption liquid is reduced on the premise of ensuring the acid gas treatment effect.
The dosing system 11 includes PH detector 111, medicine storage tank 112 and flow valve 113, and PH detector 111 installs in handling pond 10, and through advancing medicine pipeline 14 intercommunication between medicine storage tank 112 and the handling pond 10, flow valve 113 establishes on advancing medicine pipeline 14, and flow valve 113 and PH detector 111 electric connection, through PH detector 111 information feedback adjustment dosage for the absorption liquid keeps in the alkaline state of settlement, guarantees acid waste gas treatment effect. In order to facilitate controlling the absorption liquid to enter the first alkali spray tower 1 and the second alkali spray tower 5, a storage tank 15 is arranged between the treatment tank 10 and the second alkali spray tower 5, the absorption liquid after the adjustment is stored in the storage tank 15, a liquid inlet pipeline 101 is communicated with the storage tank 15, and an alkali-resistant pump and a control valve 102 are arranged on the drying dust collector 6.
The drying and dust removing device 6 comprises a filter 62 and an activated carbon adsorber 61 which are arranged in series, an exhaust port of the second alkali spray tower 5 is communicated with an air inlet of the filter 62 through an air inlet pipeline 52, and an induced draft fan 3 is arranged on the air inlet pipeline 52. The acid waste gas after alkali spray washing contains a small amount of water mist and water vapor, if the acid waste gas directly enters the activated carbon adsorber 61 to block the gaps of the activated carbon, the adsorption efficiency is reduced or even fails, in order to ensure the adsorption effect of the activated carbon, the acid waste gas firstly enters the filter 62 through the induced draft fan 3 to remove dust and viscous substances, and then enters the activated carbon adsorber 61 to remove absorption liquid components and other impurities possibly carried.
The implementation principle of the acid waste gas recycling system provided by the embodiment of the utility model is as follows: the acid gas enters the first alkali spray tower 1 through the induced draft fan 3 and then reacts with the absorption liquid, the absorption liquid after reaction enters the recovery tank 2 through a pipeline, the acid gas after reaction with the absorption liquid is detected by the acid gas concentration detection device 4, and the acid waste gas reaching the emission standard enters the drying and dust removal device 6 and is directly discharged after being treated by the filter 62 and the activated carbon adsorber 61 in sequence. The acid exhaust gas which does not reach the emission standard is discharged after being treated by the second alkali spray tower 5, the filter 62 and the activated carbon adsorber 61 in sequence. After the absorption liquid at the bottom outlet of the first alkali spray tower 1 enters the recovery tank 2, the absorption liquid is pumped to the PH detector 111 in the treatment tank 10 for detection, the absorption liquid is stored in the storage tank 15 after the absorption capacity is recovered by controlling the dosage of the absorption liquid, and then the absorption liquid is pumped to the first alkali spray tower 1 and the second alkali spray tower 5 through the liquid pump 103 for recovery treatment of acid waste gas.
The above embodiments are only preferred embodiments of the present utility model, and should not be construed as limiting the present utility model, and the scope of the present utility model should be defined by the claims, including the equivalents of the technical features in the claims. I.e., equivalent replacement modifications within the scope of this utility model are also within the scope of the utility model.
Claims (9)
1. An acid waste gas recycling system, which is characterized in that: the device comprises a first alkali spray tower (1) and a recovery tank (2), wherein an acid gas inlet pipe (110) is arranged at an air inlet of the first alkali spray tower (1), an induced draft fan (3) is arranged on the acid gas inlet pipe (110), and a secondary treatment unit is arranged at an air outlet of the first alkali spray tower (1); the liquid outlet at the bottom of the first alkali spray tower (1) is communicated with the recovery tank (2) through a pipeline, and a waste liquid circulation unit is arranged between the recovery tank (2) and the liquid inlet at the top of the first alkali spray tower (1).
2. An acid waste gas recycling system according to claim 1, characterized in that: the secondary treatment unit comprises an acid gas concentration detection device (4), and a waste gas secondary treatment device and a drying dust removal device (6) which are arranged in series, wherein the waste gas secondary treatment device is used for recycling unqualified waste gas again, and the drying dust removal device (6) is used for drying and removing dust from qualified waste gas; the exhaust port of the first alkali spray tower (1) is provided with an exhaust gas discharge pipeline (120), an induced draft fan (3) is arranged on the exhaust gas discharge pipeline (120), the acid gas concentration detection device (4) is arranged on the exhaust gas discharge pipeline (120), the exhaust gas discharge pipeline (120) is communicated with an exhaust gas secondary treatment device through a first pipeline (7), the exhaust gas discharge pipeline (120) is communicated with a drying dust removal device (6) through a second pipeline (8), and valves (9) are arranged on the first pipeline (7) and the second pipeline (8).
3. An acid waste gas recycling system according to claim 2, characterized in that: the waste liquid circulation unit comprises a treatment tank (10) and a dosing system (11), wherein the treatment tank (10) is communicated with a liquid inlet of the first alkali spray tower (1) through a liquid inlet pipeline (101), a control valve (102) and a liquid pump (103) are arranged on the liquid inlet pipeline (101), and the control valve (102) is electrically connected with the acid gas concentration detection device (4).
4. An acid waste gas recycling system according to claim 3, characterized in that: the liquid pump (103) is an alkali-resistant pump.
5. An acid waste gas recycling system according to claim 3, characterized in that: the dosing system (11) comprises a PH detector (111), a medicine storage tank (112) and a flow valve (113), wherein the PH detector (111) is arranged in the treatment tank (10), the medicine storage tank (112) is communicated with the treatment tank (10) through a medicine inlet pipeline (14), the flow valve (113) is arranged on the medicine inlet pipeline (14), and the control valve (102) is electrically connected with the PH detector (111).
6. An acid waste gas recycling system according to claim 3, characterized in that: the waste gas secondary treatment device comprises a second alkali spray tower (5), a liquid inlet of the second alkali spray tower (5) is communicated with a liquid inlet pipeline (101), and a connecting pipeline (51) is arranged between a liquid outlet of the second alkali spray tower (5) and the recovery tank (2); an air inlet of the second alkali spray tower (5) is communicated with the first pipeline (7), and an air outlet of the second alkali spray tower (5) is communicated with an air inlet of the drying and dust removing device (6).
7. An acid waste gas recycling system according to claim 6, characterized in that: a storage tank (15) is arranged between the treatment tank (10) and the second alkali spray tower (5), and a liquid inlet pipeline (101) is communicated with the storage tank (15).
8. An acid waste gas recycling system according to claim 6, characterized in that: the drying dust removing device (6) comprises an activated carbon absorber (61), an exhaust port of the second alkali spray tower (5) is communicated with an air inlet of the activated carbon absorber (61) through an air inlet pipeline (52), and an induced draft fan (3) is arranged on the air inlet pipeline (52).
9. The acid waste gas recycling system according to claim 8, wherein: the drying and dedusting device (6) also comprises a filter (62), and the filter (62) is arranged on the air inlet pipeline (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321113566.6U CN220090973U (en) | 2023-05-10 | 2023-05-10 | Acid waste gas recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321113566.6U CN220090973U (en) | 2023-05-10 | 2023-05-10 | Acid waste gas recycling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220090973U true CN220090973U (en) | 2023-11-28 |
Family
ID=88848022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321113566.6U Active CN220090973U (en) | 2023-05-10 | 2023-05-10 | Acid waste gas recycling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220090973U (en) |
-
2023
- 2023-05-10 CN CN202321113566.6U patent/CN220090973U/en active Active
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