CN114210188A - Tail gas treatment device and method for copper recovery production line - Google Patents
Tail gas treatment device and method for copper recovery production line Download PDFInfo
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- CN114210188A CN114210188A CN202111649286.2A CN202111649286A CN114210188A CN 114210188 A CN114210188 A CN 114210188A CN 202111649286 A CN202111649286 A CN 202111649286A CN 114210188 A CN114210188 A CN 114210188A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/76—Gas phase processes, e.g. by using aerosols
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/68—Halogens or halogen compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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Abstract
The invention relates to the technical field of tail gas treatment devices, and discloses a tail gas treatment device for a copper recovery production line, which comprises an ammonia high-efficiency stripping reaction tank and a gas storage tank, wherein the ammonia high-efficiency stripping reaction tank is connected with an ammonia high-efficiency stripping reactor through a magnetic circulating pump, and the output end of the ammonia high-efficiency stripping reaction tank is connected with the gas storage tank through a compression pump. The aim of controlling the product is achieved by controlling the molar ratio of ammonia to chlorine, the raw material cost of recycling the production line is saved, the cost of treating tail gas is saved, and the pain point of ammonia nitrogen treatment is also solved. The treatment method has stable, simple and efficient operation mode and high economic, environmental-friendly and added value.
Description
Technical Field
The invention relates to the technical field of tail gas treatment devices, in particular to a tail gas treatment device and a tail gas treatment method for a copper recovery production line.
Background
A large amount of chlorine is generated in the electrolytic copper recovery process of the PCB, the utilization rate of the chlorine at present is not up to 100 percent, and part of the unreused chlorine can be discharged in a qualified way by tail gas treatment. The chlorine gas is absorbed and prepared into industrial bleaching water or other chemical products in production and application, a large amount of chemical raw materials and electric power are consumed in the tail gas treatment process, the rise of the chemical raw materials from epidemic situations increases the tail gas treatment cost and the loss, and part of the chlorine gas still needs to be absorbed and treated by an acid waste gas tower and then can reach the emission standard. The efficient and safe utilization of the chlorine has important economic benefits and environmental protection significance, and meets the requirement of zero emission of carbon.
The tail gas treatment of ammonia adds sulphuric acid absorption ammonia through the waste gas tower, and waste gas tower waste water ammonia nitrogen is high, and the processing degree of difficulty is big, has environmental protection pressure, and the ammonium sulfate contains impurity such as greasy dirt, heavy metal can not directly cause the waste of resource again as industrial chemicals or fertilizer retrieval and utilization. At present, the problem is not solved in a simple, efficient, economic and environment-friendly mode in the industry, and therefore a copper recovery production line tail gas treatment device and a treatment method thereof are provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a device and a method for treating tail gas of a copper recovery production line, and solves the problems.
(II) technical scheme
In order to achieve the above purpose, the invention provides the following technical scheme: the utility model provides a line tail gas processing apparatus is produced in copper recovery, blows and takes off reaction tank and gas holder including the ammonia high efficiency, the ammonia high efficiency blows and takes off the reaction tank and connects the ammonia high efficiency through magnetic circulating pump and blows off the reactor, and the output that the ammonia high efficiency blows off the reaction tank passes through the compressor pump and connects the gas holder, positive manometer is openly equipped with to the gas holder, the safety blow-off valve is equipped with at the gas holder top, gas holder exit linkage normal close ammonia nitrogen concentration controlling means one, normal close ammonia nitrogen concentration controlling means one connect have positive manometer, the output of gas holder is connected pipeline formula reactor, pipeline reactor tail gas intercommunication tail gas dissolves absorbing device, and tail gas dissolves absorbing device's one end and is connected with the waste gas tower, is provided with the spray circulating pump on the waste gas tower.
Preferably, the bottom of the pipeline type reactor is provided with a mesh type chlorine distributor for dispersing chlorine, the inner wall of the pipeline type reactor is provided with an ammonia distributor above the mesh type chlorine distributor, the ammonia distributor is provided with a venturi disperser for dispersing ammonia, the surface of the pipeline type reactor is provided with a temperature sensor, the bottom input end of the pipeline type reactor is connected with a normally closed ammonia nitrogen concentration control device II, an ammonia high-efficiency stripping reaction tank is connected with the ammonia high-efficiency stripping reactor through a magnetic circulating pump under alkaline conditions to strip ammonia nitrogen to obtain mixed gas of ammonia and air, a mixed gas outlet is connected with an air compression pump, the outlet of the compression pump is connected with an air storage tank, the mesh type chlorine distributor is mixed and reacted by the chlorine dispersed by the normally closed ammonia nitrogen concentration control device II and the ammonia dispersed by the normally closed ammonia nitrogen concentration control device I according to a certain proportion, and nitrogen and hydrochloric acid gas are formed, reaction product hydrochloric acid is absorbed for recycling of a production line, nitrogen which is not reflected passes through a waste gas tower communicated with a tail gas dissolving and absorbing device, and redundant tail gas is absorbed by a spraying circulating pump of the waste gas tower and then can be discharged to the standard.
Preferably, the venturi deconcentrator is annular evenly distributed, becomes three to five degrees contained angles with the ring channel horizontal direction, upwards is the positive direction, and the material is acid and alkali-resistance PVC or PP material.
Preferably, valves are arranged at the bottoms of the pipeline reactor and the gas storage tank.
Preferably, the venturi disperser is a polytetrafluoroethylene material.
Preferably, the pipe reactor material is transparent and visible.
A treatment method of a tail gas treatment device of a copper recovery production line comprises the following steps:
the first step is as follows: firstly, carrying out stripping treatment on wastewater containing ammonia nitrogen in an ammonia gas high-efficiency stripping reaction tank under the alkaline condition that the pH value is more than ten to obtain air, ammonia gas and mixed gas;
the second step is that: then blowing off the mixed gas to enter a gas storage tank through a compression pump, and setting the gas storage tank to close the compression pump under certain pressure;
the third step: a first normally closed ammonia nitrogen concentration control device communicated with the outlet of the gas storage tank controls the concentration and flow of ammonia gas at the outlet, and a positive pressure meter displays the real-time pressure condition;
the fourth step: the mixed gas enters a pipeline type reactor, and the inner wall of the pipeline type reactor disperses ammonia gas through a Venturi disperser which is distributed annularly;
the fifth step: high-concentration chlorine gas generated by the copper anode box recovered by electrolysis enters the pipeline type reactor from the bottom through the mesh type chlorine gas distributor to react with ammonia gas, excessive mixed gas enters the tail gas dissolving and absorbing device to be absorbed and recycled, and a small amount of unabsorbed tail gas enters the waste gas tower to be treated and can be directly discharged after reaching the standard.
Preferably, the pressure of the gas storage tank is controlled to be 0.3-1.0 MPa;
preferably, the concentration of the ammonia gas at the outlet is controlled by the normally closed ammonia nitrogen concentration control device I and the normally closed ammonia nitrogen concentration control device II to be 0.01-15 g/m 3;
preferably, the concentration of the ammonia gas and the chlorine gas in the pipeline type reactor is controlled to be 2: 3-20 in molar ratio.
Preferably, the pressure of the gas storage tank is controlled to be 0.6-0.8 MPa.
Preferably, the normally closed ammonia nitrogen concentration control device I and the normally closed ammonia nitrogen concentration control device II control the concentration of the ammonia gas at the outlet to be 3-10 g/m 3.
Preferably, the concentration of the ammonia gas and the chlorine gas in the pipeline type reactor is controlled to be in a molar ratio of 2: 5-10.
Preferably, the concentration of ammonia and chlorine in the pipeline reactor is controlled in a molar ratio of 2: 15.
(III) advantageous effects
Compared with the prior art, the invention provides a copper recovery production line tail gas treatment device and a treatment method thereof, and the device has the following beneficial effects:
1. the invention relates to a tail gas treatment device and a tail gas treatment method for a copper recovery production line, which utilize the principle that excessive chlorine reacts with a small amount of ammonia to generate nitrogen and hydrochloric acid, remove ammonia in blow-off mixed gas, consume part of the chlorine generated by electrolysis, dissolve and absorb the reacted hydrochloric acid and the residual unreacted gas to be recycled to the production line, treat a small amount of tail gas which cannot be completely absorbed by a waste gas tower to reach the standard and directly discharge the tail gas, achieve the aim of controlling products by controlling the molar ratio of the ammonia to the chlorine, save the cost of recycled raw materials of the production line, treat the cost of the tail gas and solve the pain point of ammonia nitrogen treatment. The treatment method has stable, simple and efficient operation mode and high economic, environmental-friendly and added value.
Drawings
FIG. 1 is a schematic view of the present invention.
In the figure: 1. an ammonia gas high-efficiency stripping reaction tank; 101. an ammonia gas high-efficiency stripping reactor; 102. a magnetic force circulating pump; 2. a gas storage tank; 201. a positive pressure gauge; 202. a valve; 203. an air compression pump; 204. a safety vent valve; 3. a pipeline reactor; 301. an ammonia gas distributor; 3011. a venturi disperser; 302. a mesh-type chlorine distributor; 303. a first normally closed ammonia nitrogen concentration control device; 304. a temperature sensor; 305. a second normally closed ammonia nitrogen concentration control device; 4. a tail gas dissolving and absorbing device; 5. an off-gas column; 501. and (4) a spraying circulating pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a tail gas treatment device for a copper recovery production line comprises an ammonia gas high-efficiency stripping reaction tank 1 and a gas storage tank 2, the ammonia high-efficiency stripping reaction tank 1 is connected with an ammonia high-efficiency stripping reactor 101 through a magnetic circulating pump 102, the output end of the ammonia high-efficiency stripping reaction tank 1 is connected with a gas storage tank 2 through an air compression pump 203, a positive pressure gauge 201 is arranged on the front surface of the gas storage tank 2, a safety discharge valve 204 is arranged at the top of the gas storage tank 2, the outlet of the gas storage tank 2 is connected with a first normally closed ammonia nitrogen concentration control device 303, the first normally closed ammonia nitrogen concentration control device 303 is connected with a positive pressure gauge 201, the output end of the gas storage tank 2 is connected with the pipeline type reactor 3, the tail gas of the pipeline type reactor 3 is communicated with the tail gas dissolving and absorbing device 4, one end of the tail gas dissolving and absorbing device 4 is connected with the waste gas tower 5, and the waste gas tower 5 is provided with the spraying circulating pump 501.
Further, 3 bottoms of pipeline formula reactor are equipped with netted chlorine distributor 302 that is used for dispersing chlorine, and 3 inner walls of pipeline formula reactor are provided with ammonia distributor 301 corresponding netted chlorine distributor 302 top, ammonia distributor 301 is equipped with venturi deconcentrator 3011 that is used for dispersing the ammonia, and temperature sensor 304 is equipped with on the surface of pipeline formula reactor 3, and the bottom input of pipeline formula reactor 3 is connected with normally closed ammonia nitrogen concentration controlling means two 305, and ammonia high efficiency blows off reaction tank 1 and connects ammonia high efficiency through magnetic force circulating pump 102 under alkaline condition and blow off reactor 101 and blow off the ammonia nitrogen and handle, obtains the gaseous mixture of ammonia and air, and the gaseous mixture exit linkage air compressor pump 203, air compressor pump 203 export is connected with gas holder 2, netted chlorine distributor 302 is through the chlorine of normally closed ammonia nitrogen concentration controlling means two dispersed and venturi deconcentrator 3011 through the normally closed ammonia nitrogen concentration controlling means one 303 dispersed ammonia according to press The nitrogen and the hydrochloric acid are mixed and reacted in a certain proportion to form nitrogen and hydrochloric acid gas, the reaction product hydrochloric acid is absorbed for recycling of a production line, the nitrogen which is not reflected passes through a waste gas tower 5 communicated with a tail gas dissolving and absorbing device 4, and the nitrogen can reach the standard and be discharged after absorbing redundant tail gas through a spraying circulating pump 501 of the waste gas tower 5.
Further, venturi deconcentrator 3011 is annular evenly distributed, becomes three to five degrees contained angles with the ring channel horizontal direction, upwards is the positive direction, and the material is acid and alkali-resistance PVC or PP material.
Further, valves 202 are arranged at the bottoms of the pipeline reactor 3 and the gas storage tank 2.
Further, the venturi disperser 3011 is a teflon material.
Further, the material of the pipeline reactor 3 is transparent and visible.
The working principle is as follows: the high-efficient air stripping reaction tank 1 of ammonia is connected the high-efficient air stripping reactor 101 of ammonia and is blown off the processing to the ammonia nitrogen through magnetic circulating pump 102 under alkaline condition, obtains the mist of ammonia and air, and mist exit linkage air compressor pump 203, air compressor pump 203 export is connected with gas holder 2, netted chlorine distributor 302 is through the chlorine of two 305 dispersions of normal close ammonia nitrogen concentration controlling means and venturi deconcentrator 3011 through the ammonia of one 303 dispersion of normal close ammonia nitrogen concentration controlling means according to certain proportion mixing reaction, forms nitrogen gas and hydrochloric acid gas, and absorption reaction product hydrochloric acid is used for producing the line retrieval and utilization, and the nitrogen gas that is not reflected dissolves the waste gas tower 5 of absorbing device 4 intercommunication through tail gas, can reach the mark after the unnecessary tail gas of spray circulating pump 501 absorption through waste gas tower 5 and discharge.
The first embodiment is as follows: a treatment method of a tail gas treatment device of a copper recovery production line comprises the following steps:
the first step is as follows: firstly, carrying out stripping treatment on wastewater containing ammonia nitrogen in an ammonia gas high-efficiency stripping reaction tank 1 under an alkaline condition that the pH value is more than ten to obtain air, ammonia gas and mixed gas;
the second step is that: then blowing off the mixed gas to enter the gas storage tank 2 through the compression pump, and setting the gas storage tank 2 to close the compression pump under certain pressure;
the third step: a first normally closed ammonia nitrogen concentration control device 303 communicated with the outlet of the gas storage tank 2 controls the concentration and flow of the ammonia gas at the outlet, and a positive pressure meter 201 displays the real-time pressure condition;
the fourth step: the mixed gas enters a pipeline type reactor 3, and ammonia gas is dispersed on the inner wall of the pipeline type reactor 3 through a Venturi disperser 3011 distributed annularly;
the fifth step: high-concentration chlorine generated by the copper anode box recovered by electrolysis enters the pipeline type reactor 3 from the bottom through the mesh type chlorine distributor 302 to react with ammonia, excessive mixed gas enters the tail gas dissolving and absorbing device 4 to be absorbed and recycled, and a small amount of unabsorbed tail gas enters the waste gas tower 5 to be treated and directly discharged after reaching the standard.
Further, the pressure of the gas storage tank 2 is controlled to be 0.3-1.0 MPa;
further, the normally closed ammonia nitrogen concentration control device I303 and the normally closed ammonia nitrogen concentration control device II 305 control the concentration of the ammonia gas at the outlet to be 0.01-15 g/m 3;
further, the concentration of ammonia and chlorine in the pipeline reactor 3 is controlled to be 2: 3-20 in molar ratio.
The technical principle of the scheme is as follows: the chemical equation of the reaction of ammonia and chlorine is verified through experiments, and when excessive ammonia exists, the chemical equation of the reaction is
In the presence of a small amount of ammonia, the chemical equation of the reaction is
In the second embodiment, on the basis of the first embodiment:
a treatment method of a tail gas treatment device of a copper recovery production line comprises the following steps:
the first step is as follows: firstly, carrying out stripping treatment on wastewater containing ammonia nitrogen in an ammonia gas high-efficiency stripping reaction tank 1 under an alkaline condition that the pH value is more than ten to obtain air, ammonia gas and mixed gas;
the second step is that: then blowing off the mixed gas to enter the gas storage tank 2 through the compression pump, and setting the gas storage tank 2 to close the compression pump under certain pressure;
the third step: a first normally closed ammonia nitrogen concentration control device 303 communicated with the outlet of the gas storage tank 2 controls the concentration and flow of the ammonia gas at the outlet, and a positive pressure meter 201 displays the real-time pressure condition;
the fourth step: the mixed gas enters a pipeline type reactor 3, and ammonia gas is dispersed on the inner wall of the pipeline type reactor 3 through a Venturi disperser 3011 distributed annularly;
the fifth step: high-concentration chlorine generated by the copper anode box recovered by electrolysis enters the pipeline type reactor 3 from the bottom through the mesh type chlorine distributor 302 to react with ammonia, excessive mixed gas enters the tail gas dissolving and absorbing device 4 to be absorbed and recycled, and a small amount of unabsorbed tail gas enters the waste gas tower 5 to be treated and directly discharged after reaching the standard.
And the pressure of the gas storage tank 2 is controlled to be 0.6-0.8 MPa.
The first normally closed ammonia nitrogen concentration control device 303 and the second normally closed ammonia nitrogen concentration control device 305 control the concentration of the ammonia gas at the outlet to be 3-10 g/m 3.
The concentration of ammonia and chlorine in the pipeline type reactor 3 is controlled to be 2: 5-10 in molar ratio.
In the third embodiment, on the basis of the first embodiment:
a treatment method of a tail gas treatment device of a copper recovery production line comprises the following steps:
the first step is as follows: firstly, carrying out stripping treatment on wastewater containing ammonia nitrogen in an ammonia gas high-efficiency stripping reaction tank 1 under an alkaline condition that the pH value is more than ten to obtain air, ammonia gas and mixed gas;
the second step is that: then blowing off the mixed gas to enter the gas storage tank 2 through the compression pump, and setting the gas storage tank 2 to close the compression pump under certain pressure;
the third step: a first normally closed ammonia nitrogen concentration control device 303 communicated with the outlet of the gas storage tank 2 controls the concentration and flow of the ammonia gas at the outlet, and a positive pressure meter 201 displays the real-time pressure condition;
the fourth step: the mixed gas enters a pipeline type reactor 3, and ammonia gas is dispersed on the inner wall of the pipeline type reactor 3 through a Venturi disperser 3011 distributed annularly;
the fifth step: high-concentration chlorine generated by the copper anode box recovered by electrolysis enters the pipeline type reactor 3 from the bottom through the mesh type chlorine distributor 302 to react with ammonia, excessive mixed gas enters the tail gas dissolving and absorbing device 4 to be absorbed and recycled, and a small amount of unabsorbed tail gas enters the waste gas tower 5 to be treated and directly discharged after reaching the standard.
The concentration of ammonia gas and chlorine gas in the pipeline type reactor 3 is controlled to be 2:15 in molar ratio.
The following are the different ammonia concentrations in the three examples in this scheme: the difference between the surface temperature of the pipeline reactor and the ammonia nitrogen concentration in the tail gas brought by the ammonia gas concentration.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
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| CN202111649286.2A CN114210188A (en) | 2021-12-30 | 2021-12-30 | Tail gas treatment device and method for copper recovery production line |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07204669A (en) * | 1994-01-19 | 1995-08-08 | Ebara Kogyo Senjo Kk | Treatment of waste liquid containing ammonia |
| CN102060406A (en) * | 2010-11-19 | 2011-05-18 | 南京工业大学 | An integrated process for closed-circuit treatment of ammonia-nitrogen wastewater with high-efficiency stripping and tail gas ammonia resource utilization |
| CN111346486A (en) * | 2020-03-17 | 2020-06-30 | 浙江大学 | A kind of oxygen iodine chemical laser tail gas treatment method and system |
| CN216703904U (en) * | 2021-12-30 | 2022-06-10 | 广东臻鼎环境科技有限公司 | Copper is retrieved and is produced line tail gas processing apparatus |
-
2021
- 2021-12-30 CN CN202111649286.2A patent/CN114210188A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07204669A (en) * | 1994-01-19 | 1995-08-08 | Ebara Kogyo Senjo Kk | Treatment of waste liquid containing ammonia |
| CN102060406A (en) * | 2010-11-19 | 2011-05-18 | 南京工业大学 | An integrated process for closed-circuit treatment of ammonia-nitrogen wastewater with high-efficiency stripping and tail gas ammonia resource utilization |
| CN111346486A (en) * | 2020-03-17 | 2020-06-30 | 浙江大学 | A kind of oxygen iodine chemical laser tail gas treatment method and system |
| CN216703904U (en) * | 2021-12-30 | 2022-06-10 | 广东臻鼎环境科技有限公司 | Copper is retrieved and is produced line tail gas processing apparatus |
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