CN219072573U - Purifying device for chlorine-containing waste gas - Google Patents
Purifying device for chlorine-containing waste gas Download PDFInfo
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- CN219072573U CN219072573U CN202223579770.5U CN202223579770U CN219072573U CN 219072573 U CN219072573 U CN 219072573U CN 202223579770 U CN202223579770 U CN 202223579770U CN 219072573 U CN219072573 U CN 219072573U
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Abstract
The utility model discloses a chlorine-containing waste gas purifying device, which belongs to the technical field of waste gas treatment and comprises a plurality of first air pipes, a precooling system, an alkaline washing tower, a reduction tower, a dry chemical adsorption tower, a fan and an exhaust barrel; the precooling system, the alkaline washing tower, the reduction tower, the dry chemical adsorption tower, the fan and the exhaust drum are connected through a first air pipe in sequence; the alkaline washing tower is used for neutralizing the precooled waste gas; the reduction tower is used for removing chlorine in the waste gas; the dry chemical adsorption tower is used for filtering mist and removing chlorine secondarily; the method comprises the steps of pre-cooling chlorine-containing waste gas through a pre-cooling system to enable the flue gas to be in a humidity saturated state; the cooled flue gas enters an alkaline tower to undergo a neutralization reaction for chemical absorption; the absorbed flue gas enters a reduction tower after defogging, and undergoes a reduction reaction to be subjected to chemical absorption; and the absorbed flue gas enters a chemical adsorption tower after demisting, and dust-containing substances and mist are filtered and subjected to chemical adsorption.
Description
Technical Field
The utility model relates to a chlorine-containing waste gas purifying device, and belongs to the technical field of waste gas treatment.
Background
The inorganic chlorine-containing waste gas mainly comprises hydrogen chloride (HCl) and chlorine (Cl 2), and is mainly derived from a production process taking chlorine and hydrogen chloride as raw materials; incineration of chlorine-containing materials produces: including industries such as petroleum, chemical industry, medicine, pesticide, electronics, semiconductors, optical fibers, chlorine-containing hazardous waste incineration, chlorine-containing household garbage incineration and the like. The application range of the chlorine-containing waste gas is wide, but the chlorine-containing waste gas has strong pungent smell, corrosiveness, especially chlorine, extremely toxicity and asphyxia and has great harm to human bodies and surrounding environments, so that effective treatment equipment is necessary.
The treatment processes of single-cycle absorption, filtration, active carbon adsorption, alkaline absorption and active carbon adsorption are mostly adopted at present, and the treatment of chlorine-containing waste gas with high temperature, high humidity and high content is difficult to be satisfied by a single-cycle absorption system and filtration and active carbon adsorption; and alkaline absorption and activated carbon absorption, because the waste gas is in a humidity saturated state after cyclic absorption, the waste gas directly enters an activated carbon tower for absorption, the relative humidity in the waste gas is higher, the absorption performance of the activated carbon can be seriously affected, and if the temperature in the activated carbon tower is lower than the ambient temperature, a large amount of water is condensed, especially in winter, the phenomenon can be more obvious, the service life of the activated carbon tower is affected, and on the other hand, the high-concentration chlorine-containing waste gas adopts an absorption method, so that the consumption of the activated carbon is larger, the secondary pollution is generated, the system operation cost is high, the treatment cost of the dangerous waste is also increased, and the economical efficiency is low.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art, provides a chlorine-containing waste gas purifying device, and solves the problems that the circulating absorption is single and the service life of an activated carbon tower is suddenly reduced due to unreasonable treatment process in the current treatment of the chlorine-containing waste gas.
In order to achieve the above purpose/solve the above technical problems, the present utility model is realized by adopting the following technical scheme: a chlorine-containing waste gas purifying device comprises a plurality of first air pipes, a precooling system, an alkaline washing tower, a reduction tower, a dry chemical adsorption tower, a fan and an exhaust barrel; the precooling system, the alkaline washing tower, the reduction tower, the dry chemical adsorption tower, the fan and the exhaust drum are connected through a first air pipe in sequence;
the precooling system is provided with an exhaust gas inlet and is used for precooling and cooling the exhaust gas;
the alkaline washing tower is used for neutralizing the precooled waste gas;
the reduction tower is used for removing chlorine in the waste gas;
the dry chemical adsorption tower is used for filtering mist and removing chlorine secondarily.
Optionally, the pre-cooling system comprises a nozzle and a spraying system, and the nozzle is connected with the spraying system.
Optionally, the alkaline washing tower comprises a first circulating water tank, a first packing layer, a first demisting layer and a first internal pipeline communicated with the first demisting layer, wherein the first circulating water tank, the first packing layer, the first demisting layer and the first internal pipeline are arranged from bottom to top; a liquid outlet of the first circulating water tank is provided with a first circulating water pump, a water outlet of the first circulating water pump is provided with a first circulating pipeline, one end of the first circulating pipeline is connected with a first sewage draining pipeline, and the other end of the first circulating pipeline is connected with a first nozzle; the first circulating pipeline is communicated with the spraying system, and the first internal pipeline is connected with the reduction tower through a first air pipe.
Optionally, a first overflow port, a first water supplementing port and a first alkali liquor adding port are arranged on the first circulating water tank; the first overflow port is connected with a first overflow pipeline; the first alkali liquor dosing port is connected with an alkali liquor dosing pipeline, and the first water supplementing port is connected with a first water supplementing pipeline.
Optionally, the reduction tower comprises a second circulating water tank, a second packing layer, a second demisting layer and a second internal pipeline communicated with the second demisting layer, which are arranged from bottom to top; a liquid outlet of the second circulating water tank is provided with a second circulating water pump, and a water outlet of the second circulating water pump is provided with a second circulating pipeline; one end of the second circulating pipeline is connected with a second sewage draining pipeline, and the other end of the second circulating pipeline is connected with a second nozzle; the second internal pipeline is connected with the dry chemical adsorption tower through the first air pipe.
Optionally, a second overflow port, a second water supplementing port, a second alkaline solution dosing port and a reducing agent dosing port are arranged on the second circulating water tank; the second overflow port is connected with a second overflow pipeline; the second alkali liquor dosing port is connected with an alkali liquor dosing pipeline; the reducing agent adding port is connected with a reducing agent adding pipeline; the second water supplementing port is connected with a second water supplementing pipeline.
Optionally, the bottoms of the first packing layer, the first demisting layer, the second packing layer and the second demisting layer are respectively provided with a thick and thin grid support and a press ring for placing packing.
Optionally, a heater is arranged on a first air pipe connected with the reduction tower and the dry chemical adsorption tower, a first valve is arranged on the first air pipe at one side of an air inlet of the heater, a second air pipe is arranged at the left side of the first valve, and a second valve is arranged on the second air pipe; one end of the second air pipe is connected with a first air pipe connected with the reduction tower and the dry chemical adsorption tower, and the other end of the second air pipe is connected with a first air pipe connected with the dry chemical adsorption tower and the fan.
Optionally, the dry chemical adsorption tower comprises a filter layer and an adsorption layer which are arranged from bottom to top; the filter layer is one of a primary filter, a medium-grade filter and a high-grade filter; the adsorption layer is filled with dry chemical adsorbent.
Compared with the prior art, the utility model has the beneficial effects that:
1. before the chlorine-containing waste gas is treated, the chlorine-containing waste gas is firstly introduced into a pre-cooling system, and the pre-cooling system is used for pre-cooling the chlorine-containing waste gas, so that the flue gas is in a humidity saturation state; the cooled flue gas enters an alkaline tower to undergo a neutralization reaction for chemical absorption; the absorbed flue gas enters a reduction tower after defogging, and undergoes a reduction reaction to be subjected to chemical absorption; the absorbed flue gas enters the chemical adsorption tower after demisting to filter dust-containing substances and mist and is subjected to chemical adsorption, and finally, the treated waste gas is discharged at high altitude through a fan and an exhaust drum, so that the problems that the circulating absorption is single during the current chlorine-containing waste gas treatment and the service life of the activated carbon tower is suddenly reduced due to unreasonable treatment process are solved.
2. According to the utility model, the heater is arranged to preheat the waste gas to the corresponding temperature, ensures that the waste gas enters the dry chemical adsorption tower after the humidity is lower than 90%, and improves the absorption performance of the dry chemical adsorption tower by properly improving the outlet temperature of the reduction tower to reduce the humidity of the waste gas.
3. By arranging the second air pipe, the concentration of the waste gas at the outlet of the reduction tower can be monitored by staff through the corresponding monitoring instrument, and if the concentration reaches the standard, the waste gas at the outlet of the reduction tower can directly skip the treatment of the dry chemical adsorption tower, so that the continuous operation and the economical efficiency of the operation of the waste gas treatment equipment are ensured.
Drawings
FIG. 1 is a schematic diagram of a purifying apparatus for chlorine-containing exhaust gas according to an embodiment of the present utility model.
In the figure: 1. a first air duct; 2. a precooling system; 201. a nozzle; 202. a spraying system; 3. an alkaline washing tower; 301. a first circulation tank; 302. a first filler layer; 303. a first mist-removing layer; 304. a first internal conduit; 305. a first circulating water pump; 306. a first circulation line; 307. a first sewage line; 308. a first spout; 309. a first overflow line; 310. an alkali liquor dosing pipeline; 311. a first water supplementing pipeline; 4. a reduction tower; 401. a second circulation tank; 402. a second filler layer; 403. a second mist-removing layer; 404. a second internal conduit; 405. a second circulating water pump; 406. a second circulation line; 407. a second sewage line; 408. a second spout; 409. a second overflow line; 410. a reducing agent dosing pipeline; 411. a second water supplementing pipeline; 5. a dry chemisorption tower; 501. a filter layer; 502. an adsorption layer; 6. a blower; 7. an exhaust pipe; 8. a heater; 9. a first valve; 10. a second air duct; 11. and a second valve.
Detailed Description
The utility model is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.
In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.
Examples
As shown in fig. 1, a chlorine-containing waste gas purifying device comprises a plurality of first air pipes 1, a precooling system 2, an alkaline washing tower 3, a reduction tower 4, a dry chemical adsorption tower 5, a fan 6 and an exhaust drum 7; the precooling system 2, the alkaline washing tower 3, the reduction tower 4, the dry chemical adsorption tower 5, the fan 6 and the exhaust funnel 7 are connected in sequence through the first air pipe 1; the precooling system 2 is provided with an exhaust gas inlet for precooling and cooling the exhaust gas;
the precooling system 2 comprises a nozzle 201 and a spraying system 202, the nozzle 201 is connected with the spraying system 202, the precooling system 2 is used for carrying out cooling treatment on chlorine-containing waste gas in advance, and can be used for carrying out excessive spraying circulating liquid on the high-temperature (200 ℃) chlorine-containing waste gas, so that the temperature can be effectively reduced to below 80 ℃, and the flue gas is in a humidity saturated state at the moment;
the alkaline washing tower 3 comprises a first circulating water tank 301, a first packing layer 302, a first demisting layer 303 and a first internal pipeline 304 communicated with the first demisting layer 303, which are arranged from bottom to top; a first circulating water pump 305 is arranged at the liquid outlet of the first circulating water tank 301, a first circulating pipeline 306 is arranged at the water outlet of the first circulating water pump 305, one end of the first circulating pipeline 306 is connected with a first sewage discharging pipeline 307, and the other end is connected with a first nozzle 308; the first circulating pipeline 306 is communicated with the spraying system 202, and the first internal pipeline 304 is connected with the reduction tower 4 through the first air pipe 1; the first circulating water tank 301 is provided with a first overflow port, a first water supplementing port and a first alkali liquor adding port; the first overflow port is connected with a first overflow pipeline 309; the first alkali liquor dosing port is connected with an alkali liquor dosing pipeline 310, and the first water supplementing port is connected with a first water supplementing pipeline 311; the flue gas entering the alkaline washing tower 3 is in countercurrent contact with the circulating alkali liquor sprayed by the first nozzle 308 in the packing layer, so that HCl and Cl2 in the flue gas are fully neutralized and absorbed; because the alkaline washing tower 3 and the precooling system 2 share the first circulating water pump 305 and the first circulating water tank 301, the equipment is more compact, occupies a small area and is convenient to install and disassemble;
the reduction tower 4 is arranged behind the alkaline washing tower 3 because the Cl2 is less water-soluble than HCl, and the reduction tower 4 comprises a second circulating water tank 401, a second packing layer 402, a second demisting layer 403 and a second internal pipeline 404 communicated with the second demisting layer 403 which are arranged from bottom to top; a second circulating water pump 405 is arranged at the liquid outlet of the second circulating water tank 401, and a second circulating pipeline 406 is arranged at the water outlet of the second circulating water pump 405; one end of the second circulating pipeline 406 is connected with a second sewage pipeline 407, the other end of the second circulating pipeline is connected with a second nozzle 408, and the second nozzle 408 is used for spraying circulating liquid medicine and reducing Cl2 in the waste gas into harmless salt substances again and remaining in a liquid phase so as to achieve the aim of reducing emission; the second internal pipeline 404 is connected with the dry chemical adsorption tower 5 through the first air pipe 1; the second circulating water tank 401 is provided with a second overflow port, a second water supplementing port, a second alkaline solution dosing port and a reducing agent dosing port; the second overflow port is connected with a second overflow pipeline 409; the second alkali liquor adding port is connected with an alkali liquor adding pipeline 310; a reducing agent adding pipeline 410 is connected to the reducing agent adding port; the second water supplementing port is connected with a second water supplementing pipeline 411; the alkali liquor can be sodium hydroxide, sodium carbonate, sodium bicarbonate and the like, the mass concentration is 10-30%, the reducing agent can be sodium sulfite, sodium sulfide and the like, and the mass concentration is 10-30%; the overflow pipeline, the water supplementing pipeline and the dosing pipeline are provided with related electric valves and control instruments, including but not limited to a pH controller, a conductivity controller, an ORP controller and a liquid level controller; the bottoms of the first packing layer 302, the first mist removing layer 303, the second packing layer 402 and the second mist removing layer 403 are respectively provided with a thick and thin grid support and a press ring for placing packing, and the packing forms in the first packing layer 302 and the second packing layer 402 can be random packing or structured packing;
a heater 8 is arranged on the first air pipe 1 connected with the dry chemical adsorption tower 5 of the reduction tower 4, a first valve 9 is arranged on the first air pipe 1 at one side of an air inlet of the heater 8, a second air pipe 10 is arranged at the left side of the first valve 9, and a second valve 11 is arranged on the second air pipe 10; one end of the second air pipe 10 is connected with the first air pipe 1 connected with the reduction tower 4 and the dry type chemical adsorption tower 5, and the other end of the second air pipe is connected with the first air pipe 1 connected with the dry type chemical adsorption tower 5 and the fan 6; the heat source of the heater 8 can be one of electric heating, steam heating, natural gas heating and hot water heating, so that the outlet temperature of the reduction tower 4 is properly increased to reduce the relative humidity of the waste gas to below 90%, and the absorption performance of the dry chemical absorption tower 5 is improved; through setting up second tuber pipe 10, the concentration of staff accessible corresponding monitoring instrument monitoring reduction tower 4 exit waste gas can make the waste gas of reduction tower 4 exit directly skip the processing of dry-type chemisorption tower 5 if concentration reaches standard, ensures the economy of waste gas treatment facility continuous operation and operation.
The dry chemical adsorption tower 5 comprises a filter layer 501 and an adsorption layer 502 which are arranged from bottom to top; the filter layer 501 is one of primary, intermediate and high-level filters, and specifically, primary, intermediate and high-level filters are respectively provided with primary, intermediate and high-efficiency filter materials; the primary, medium and high-efficiency filtering material is a multi-layer net-shaped filtering material woven by non-woven fabric fibers; the primary filter is mainly used for filtering dust particles with the particle diameter of more than 5 mu m; the medium-grade filter belongs to F series filters in the air filter, is generally a bag filter, comprises F5, F6, F7, F8 and F9 grades, is widely applicable to the filtration of an air conditioning system, and is mainly used for filtering dust particles with the particle size of more than 1-5 um; the high-grade filter is used for capturing particle dust below 0.5um and various suspended matters; the adsorption layer 502 is filled with a dry chemical adsorbent, can effectively adsorb chlorine-containing waste gas (mainly Cl2 and HCl), and has a small dosage.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present utility model, and such modifications and variations should also be regarded as being within the scope of the utility model.
Claims (9)
1. The chlorine-containing waste gas purifying device is characterized by comprising a plurality of first air pipes, a precooling system, an alkaline washing tower, a reduction tower, a dry chemical adsorption tower, a fan and an exhaust barrel; the precooling system, the alkaline washing tower, the reduction tower, the dry chemical adsorption tower, the fan and the exhaust drum are connected through a first air pipe in sequence;
the precooling system is provided with an exhaust gas inlet and is used for precooling and cooling the exhaust gas;
the alkaline washing tower is used for neutralizing the precooled waste gas;
the reduction tower is used for removing chlorine in the waste gas;
the dry chemical adsorption tower is used for filtering mist and removing chlorine secondarily.
2. The chlorine-containing waste gas purifying apparatus as recited in claim 1, wherein the pre-cooling system includes a nozzle and a spray system, the nozzle being connected to the spray system.
3. The chlorine-containing waste gas purifying device according to claim 2, wherein the alkaline washing tower comprises a first circulating water tank, a first packing layer, a first demisting layer and a first internal pipeline communicated with the first demisting layer, which are arranged from bottom to top; a liquid outlet of the first circulating water tank is provided with a first circulating water pump, a water outlet of the first circulating water pump is provided with a first circulating pipeline, one end of the first circulating pipeline is connected with a first sewage draining pipeline, and the other end of the first circulating pipeline is connected with a first nozzle; the first circulating pipeline is communicated with the spraying system, and the first internal pipeline is connected with the reduction tower through a first air pipe.
4. The chlorine-containing waste gas purifying device according to claim 3, wherein the first circulating water tank is provided with a first overflow port, a first water supplementing port and a first alkali liquor adding port; the first overflow port is connected with a first overflow pipeline; the first alkali liquor dosing port is connected with an alkali liquor dosing pipeline, and the first water supplementing port is connected with a first water supplementing pipeline.
5. The chlorine-containing waste gas purifying device as recited in claim 4, wherein the reduction tower comprises a second circulating water tank, a second packing layer, a second demisting layer and a second internal pipeline communicated with the second demisting layer, which are arranged from bottom to top; a liquid outlet of the second circulating water tank is provided with a second circulating water pump, and a water outlet of the second circulating water pump is provided with a second circulating pipeline; one end of the second circulating pipeline is connected with a second sewage draining pipeline, and the other end of the second circulating pipeline is connected with a second nozzle; the second internal pipeline is connected with the dry chemical adsorption tower through the first air pipe.
6. The chlorine-containing waste gas purifying device according to claim 5, wherein the second circulating water tank is provided with a second overflow port, a second water supplementing port, a second alkaline solution dosing port and a reducing agent dosing port; the second overflow port is connected with a second overflow pipeline; the second alkali liquor dosing port is connected with an alkali liquor dosing pipeline; the reducing agent adding port is connected with a reducing agent adding pipeline; the second water supplementing port is connected with a second water supplementing pipeline.
7. The chlorine-containing waste gas purifying device according to claim 5, wherein the bottoms of the first packing layer, the first demisting layer, the second packing layer and the second demisting layer are respectively provided with a thick and thin grid support and a press ring for placing packing.
8. The chlorine-containing waste gas purifying device according to claim 5, wherein a heater is arranged on a first air pipe connected with the reduction tower and the dry chemical adsorption tower, a first valve is arranged on the first air pipe at one side of an air inlet of the heater, a second air pipe is arranged at the left side of the first valve, and a second valve is arranged on the second air pipe; one end of the second air pipe is connected with a first air pipe connected with the reduction tower and the dry chemical adsorption tower, and the other end of the second air pipe is connected with a first air pipe connected with the dry chemical adsorption tower and the fan.
9. The chlorine-containing exhaust gas purifying apparatus according to claim 1, wherein the dry chemisorption tower comprises a filter layer and an adsorption layer arranged from bottom to top; the filter layer is one of a primary filter, a medium-grade filter and a high-grade filter; the adsorption layer is filled with dry chemical adsorbent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223579770.5U CN219072573U (en) | 2022-12-30 | 2022-12-30 | Purifying device for chlorine-containing waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223579770.5U CN219072573U (en) | 2022-12-30 | 2022-12-30 | Purifying device for chlorine-containing waste gas |
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| Publication Number | Publication Date |
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| CN219072573U true CN219072573U (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223579770.5U Active CN219072573U (en) | 2022-12-30 | 2022-12-30 | Purifying device for chlorine-containing waste gas |
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| CN (1) | CN219072573U (en) |
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- 2022-12-30 CN CN202223579770.5U patent/CN219072573U/en active Active
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