CN212440745U - Flue gas denitration system of tin smelting furnace - Google Patents
Flue gas denitration system of tin smelting furnace Download PDFInfo
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- CN212440745U CN212440745U CN202021110553.XU CN202021110553U CN212440745U CN 212440745 U CN212440745 U CN 212440745U CN 202021110553 U CN202021110553 U CN 202021110553U CN 212440745 U CN212440745 U CN 212440745U
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- smelting furnace
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- flue
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Abstract
The utility model provides a tin smelting furnace flue gas denitration system, includes ammonia water and joins in marriage dense device (1), ammonia liquid storage device (3), stretches into ammonia liquid transport distribution pipeline (12) in tin smelting furnace flue (10) through a plurality of ammonia liquid transport branch road (13), stretches into compressed air distribution pipeline (11) in tin smelting furnace flue (10) through a plurality of compressed air branch road (14), connects ammonia liquid transport branch road and compressed airAn atomizing spray gun (7) of the branch. The utility model discloses can accomplish NO in the tin smelting flue gas in the reaction zone of reasonable setting in the tin smelting furnace flueXFully reacts with atomized ammonia liquid, efficiently denitrates, and reduces escape of ammonia.
Description
Technical Field
The utility model relates to a tin smelting flue gas administers technical field, concretely relates to smelt the device that the flue gas carries out denitration treatment to tin.
Background
The flue gas generated in the production process of the tin smelting furnace (fuming furnace and top-blown furnace) contains a large amount of smoke dust and various harmful gases, and the flue gas has high temperature, high corrosivity, complex components and NOXUnstable concentration of NO in the process of flue gas treatmentXThe treatment is not practical and effective, and the harmful gas in the flue gas is not effectively treated. With the enactment of new environmental protection laws, regulations and standards, such as environmental protection law, air pollution prevention law, matching management method, emission standard of industrial pollutants of tin, antimony and mercury (GB30770-2014), and the like, smoke dust, SO2The allowable emission standard of pollutants such as NOx is lower and lower, and higher requirements are put on the pollution treatment technology and the environmental management level of enterprises, wherein the emission standard of NOx is 300mg/m3Reduced to 200mg/m3. Therefore, it is necessary to develop a treatment device for NOx in tin smelting flue gas and strictly control NOx emission.
Disclosure of Invention
The utility model aims at solving the problem that prior art exists, provide a denitration system of flue gas is smelted to tin that the investment is low, simple high-efficient, the process is easy to control, the denitration is effectual.
The purpose of the utility model is realized through the following technical scheme:
a flue gas denitration system of a tin smelting furnace comprises an ammonia water concentration distribution device, an ammonia liquid storage device connected with the ammonia water concentration distribution device through a pipeline, an ammonia liquid conveying and distributing pipeline with one end connected with the ammonia liquid storage device and the other end extending into a flue of the tin smelting furnace through a plurality of ammonia liquid conveying branches, a compressed air distributing pipeline extending into the flue of the tin smelting furnace through a plurality of compressed air branches, and an atomizing spray gun connected with the ammonia liquid conveying branches and the compressed air branches; a first conveying pump is arranged on a pipeline connecting the ammonia water concentration distribution device and the ammonia liquid storage device, and a second conveying pump is arranged on the ammonia liquid conveying and distribution pipeline; the ammonia liquid conveying and distributing pipelines are arranged along the two sides and the top surface of the tin smelting furnace flue, and the ammonia liquid conveying and distributing pipelines are connected with ammonia liquid conveying branches which extend into the flue from the two sides and the top surface of the tin smelting furnace flue respectively; the compressed air distribution pipeline is also arranged along the two sides and the top surface of the tin smelting furnace flue, and compressed air branches extending into the flue from the two sides and the top surface of the tin smelting furnace flue are connected to the compressed air distribution pipeline; an ammonia liquid conveying branch is matched with a compressed air branch and is connected with an atomizing spray gun together, and atomized ammonia liquid is sprayed into a flue to carry out flue gas denitration; the ammonia liquid conveying and distributing pipeline is provided with an ammonia liquid control valve, and the compressed air distributing pipeline is provided with a compressed air control valve; an ammonia water regulating valve, an ammonia water flowmeter and an ammonia water pressure gauge are arranged on each ammonia liquid conveying branch, and a compressed air regulating valve, a compressed air flowmeter and a compressed air pressure gauge are arranged on each compressed air branch; a flue gas online monitoring device and an ammonia online monitoring device are arranged in a flue of the tin smelting furnace; the ammonia liquid control valve, the compressed air control valve, the ammonia water regulating valve, the compressed air regulating valve, the ammonia water flowmeter, the compressed air flowmeter, the ammonia water pressure gauge, the compressed air pressure gauge, the flue gas online monitoring device and the ammonia gas online monitoring device are all connected with the automatic control system of the tin smelting furnace.
Further, the branch road is carried to the ammonia liquid and the compressed air branch road is provided with 8 respectively, constitutes 8 and carries the combination of branch road and compressed air branch road to the ammonia liquid, connects 8 atomizing spray guns respectively, and the front end interval sets up 2 atomizing spray guns in the tin smelting stove flue, and the top interval sets up 2 atomizing spray guns, and the rear end interval sets up 4 atomizing spray guns.
The utility model discloses a rationally set up and ammonia liquid spraying system along tin smelting furnace flue, make the ammonia liquid contact perpendicularly with the flue gas on the cross section of tin smelting furnace flue, catch NOx in the flue gas and react with it rapidly in the atomizing twinkling of an eye of ammonia liquid, high efficiency reaches desorption NOx's purpose.
Compared with the prior art, the utility model has the main advantages that:
1. based on the characteristics of large smoke and dust amount, high flowing speed, high temperature, easy volatilization of ammonia water, low cost, good safety and the like of the tin smelting furnace, ammonia liquor is adopted as a reducing agent, and an atomization spraying method is adopted, so that the smoke and the reducing agent are fully reacted, and the denitration efficiency is improved;
2. according to the temperature zone change characteristics of the tin smelting furnace flue gas in the flue, a reaction zone of ammonia liquid and the flue gas is reasonably arranged, so that the denitration is more thorough;
3. according to NO in the flue gas of the tin smelting furnaceXDifferent working conditions such as unstable concentration and the like are doubly connected with the tin smelting flue gas on-line monitoring device and the ammonia escape on-line monitoring device, and the ammonia liquid injection amount is bidirectionally regulated and controlled by the automatic control system of the tin smelting furnace, so that the atomized ammonia liquid amount injected by the atomizing spray gun and NO generated in the flue gas of the tin smelting furnaceXThe reaction is thorough, the escape rate of ammonia is low, and excessive ammonia liquor can not be sprayed out, so that the operation and the heat efficiency of the tin smelting furnace are influenced.
4. The utility model discloses the system investment is low, easily installs and control, and the practicality is strong.
Drawings
Fig. 1 is the utility model discloses a denitration system schematic diagram.
In the figure: 1-ammonia water concentration distribution device, 2-first delivery pump, 3-ammonia water storage device, 4-second delivery pump, 5-compressed air regulating valve, 6-ammonia water regulating valve, 7-atomization spray gun, 8-ammonia water control valve, 9-compressed air control valve, 10-tin smelting furnace flue, 11-compressed air distribution pipeline, 12-ammonia liquid delivery distribution pipeline, 13-ammonia liquid delivery branch, 14-compressed air branch, 15-flue gas online monitoring device, 16-ammonia gas online monitoring device, 17-ammonia liquid flow meter, 18-compressed air flow meter, 19-ammonia water pressure meter, 20-compressed air pressure meter, 21-ammonia water pipe and 22-desalted water pipe.
Detailed Description
The contents of the present invention will be further explained with reference to the drawings attached to the specification.
As shown in figure 1, a tin smelting furnace flue gas denitration system, join in marriage concentrated device 1 including the aqueous ammonia, join in marriage ammonia liquid storage device 3 that concentrated device is connected through pipeline and aqueous ammonia, ammonia liquid storage device is connected to one end, the other end carries the ammonia liquid that branch road 13 stretches into in tin smelting furnace flue 10 through a plurality of ammonia liquids and carries distribution pipeline 12, stretch into compressed air distribution pipeline 11 in tin smelting furnace flue 10 through a plurality of compressed air branch roads 14, connect the atomizing spray gun 7 of ammonia liquid transport branch road and compressed air branch road. A first delivery pump 2 is arranged on a pipeline connecting the ammonia water concentration distribution device and the ammonia liquid storage device, and a second delivery pump 4 is arranged on the ammonia liquid delivery distribution pipeline. The ammonia liquid conveying and distributing pipeline 12 is arranged along the two sides and the top surface of the tin smelting furnace flue 10, and ammonia liquid conveying branch pipelines 13 which respectively extend into the flue from the two sides and the top surface of the tin smelting furnace flue are connected on the ammonia liquid conveying and distributing pipeline. The compressed air distribution pipeline 11 is also arranged along the two sides and the top surface of the tin smelting furnace flue, and a compressed air branch 14 extending into the flue from the two sides and the top surface of the tin smelting furnace flue is connected to the compressed air distribution pipeline; an ammonia liquor conveying branch 13 is paired with a compressed air branch 14 and is connected with an atomizing spray gun 7 together, and atomized ammonia liquor is sprayed into a flue to carry out flue gas denitration. The atomizing spray gun 7 is horizontally arranged in the flue, so that the atomized ammonia liquid is sprayed along the cross section of the flue. A horizontally disposed atomizing lance is seen in cross-section in fig. 1. An ammonia liquid control valve 8 is provided in the ammonia liquid delivery and distribution line 12, and a compressed air control valve 9 is provided in the compressed air distribution line 11. An ammonia water regulating valve 6, an ammonia water flowmeter 17 and an ammonia water pressure gauge 19 are arranged on each ammonia liquid conveying branch, and a compressed air regulating valve 5, a compressed air flowmeter 18 and a compressed air pressure gauge 20 are arranged on each compressed air branch. The rear end in the flue 10 of the tin smelting furnace is provided with an on-line flue gas monitoring device 15 and an on-line ammonia gas monitoring device 16. And the ammonia liquid control valve 8, the compressed air control valve 9, the ammonia water regulating valve 6, the compressed air control valve 5, the ammonia water flowmeter 17, the compressed air flowmeter 18, the ammonia water pressure gauge 19, the compressed air pressure gauge 20, the flue gas online monitoring device 15 and the ammonia gas online monitoring device 16 are all connected with the automatic control system of the tin smelting furnace.
In this embodiment, the branch road 13 is carried to the ammonia liquid and the compressed air branch road 14 is provided with 8 respectively, constitutes 8 and carries the combination of branch road and compressed air branch road to the ammonia liquid, connects 8 atomizing spray guns 7 respectively, and the front end interval sets up 2 atomizing spray guns in tin smelting furnace flue 10, and the top interval sets up 2 atomizing spray guns, and the rear end interval sets up 4 atomizing spray guns.
Tin smelting furnace flue gas denitration system's out-of-stock method as follows: the ammonia water concentrate is fed into the ammonia water concentration device 1 through the ammonia water pipe 21, the self-produced desalted water is fed into the ammonia water concentration device through the desalted water pipe 22, and the ammonia water concentrate and the desalted water are mixed in the ammonia water concentration device 1 to prepare the ammonia water solution (ammonia solution) with the required concentration. The prepared ammonia liquid is sent to an ammonia liquid storage device 3 by a first delivery pump 2 for storage and standby. When the ammonia liquid is required to be used, the ammonia liquid is conveyed and distributed to the ammonia liquid conveying branch 13 through the ammonia liquid conveying and distributing pipeline 12 by using the second conveying pump 4; meanwhile, compressed air from the plant area air compression station is distributed to a compressed air branch 14 through a compressed air distribution pipeline 11; the ammonia liquid in the ammonia liquid conveying branch and the compressed air in the compressed air branch enter the atomizing spray gun 7 to be mixed at the same time, and ammonia liquid spray is formed and sprayed into the flue 10 of the tin smelting furnace. The atomizing spray gun 7 is available on the market directly.
The on-line monitoring device 15 of the flue gas will monitor the information of the flue gas and convey to the automatic control system of the smelting furnace of tin, the on-line monitoring device 16 of ammonia will detect the ammonia escape information and convey to the automatic control system of the smelting furnace of tin at the same time, the smelting furnace automatic control system of tin controls the flowrate of ammonia water that the smelting furnace of tin needs through the ammonia liquid control valve 8 that sets up on the ammonia liquid delivery distribution pipeline 12, through ammonia water flowmeter 17 on every ammonia liquid delivery branch road, ammonia water pressure gauge 19 and 6 regulation control single atomization spray gun of ammonia water flowrate, through compressed air control valve 9, the compressed air flowmeter 18 on every compressed air branch road, compressed air pressure gauge 20 and compressed air control valve 5 regulate the compressed air quantity that single atomization spray gun atomizes ammonia liquid and needs, the atomization spray gun sprays the atomized ammonia liquid into the high-temperature area of the smelting furnace flue of tin, in tin smeltingThe cross section of the flue of the smelting furnace is vertically contacted with the flue gas, NOx in the flue gas is captured and reacted at the moment of ammonia water atomization, NOx is removed, and the sprayed atomized ammonia liquid and NO generated in the flue gas of the tin smelting furnace are regulated and controlled by an automatic control system of the tin smelting furnaceXThe reaction is thorough, and excessive ammonia liquid can not be sprayed out.
The utility model discloses a control device among the deNOx systems is like ammonia control valve 8, compressed air control valve 9, ammonia water governing valve 6, compressed air governing valve 5, ammonia water flowmeter 17, compressed air flowmeter 18, ammonia water manometer 19, compressed air manometer 20 etc. all the automatic control system of direct access tin smelting furnace, need not establish control system in addition, borrow the flue gas on-line monitoring device 15 and the ammonia on-line monitoring device 16 of tin smelting furnace control system self-band and control again, realized the utility model discloses deNOx systems and tin smelting flue gas on-line monitoring device and ammonia on-line monitoring device's dual connectivity realizes two-way regulation control for spout the NO that produces in the volume ability of ammonia liquid and the tin smelting furnace flue gas in the flue, realize two-way regulation controlXComplete reaction, and no influence on the operation and thermal efficiency of the tin smelting furnace due to excessive sprayed ammonia liquid. Tin smelting furnace control system with the utility model discloses the access of the controlling means among the deNOx systems is the technical means that ordinary technical staff in this field is familiar with.
Claims (2)
1. A flue gas denitration system of a tin smelting furnace is characterized by comprising an ammonia water concentration distribution device (1), an ammonia liquid storage device (3) connected with the ammonia water concentration distribution device through a pipeline, an ammonia liquid conveying and distributing pipeline (12) with one end connected with the ammonia liquid storage device and the other end extending into a tin smelting furnace flue (10) through a plurality of ammonia liquid conveying branches (13), a compressed air distributing pipeline (11) extending into the tin smelting furnace flue (10) through a plurality of compressed air branches (14), and an atomizing spray gun (7) connected with the ammonia liquid conveying branches and the compressed air branches; a first delivery pump (2) is arranged on a pipeline connecting the ammonia water concentration distribution device and the ammonia liquid storage device, and a second delivery pump (4) is arranged on the ammonia liquid delivery distribution pipeline; the ammonia liquid conveying and distributing pipeline (12) is arranged along the two sides and the top surface of the tin smelting furnace flue (10), and ammonia liquid conveying branch circuits (13) extending into the flue from the two sides and the top surface of the tin smelting furnace flue are connected to the ammonia liquid conveying and distributing pipeline; the compressed air distribution pipeline (11) is also arranged along the two sides and the top surface of the tin smelting furnace flue, and compressed air branches (14) which respectively extend into the flue from the two sides and the top surface of the tin smelting furnace flue are connected to the compressed air distribution pipeline; an ammonia liquid conveying branch (13) is matched with a compressed air branch (14) and is connected with an atomizing spray gun (7) together, and atomized ammonia liquid is sprayed into a flue to carry out flue gas denitration; an ammonia liquid control valve (8) is arranged on the ammonia liquid conveying and distributing pipeline (12), and a compressed air control valve (9) is arranged on the compressed air distributing pipeline (11); an ammonia water regulating valve (6), an ammonia water flowmeter (17) and an ammonia water pressure gauge (19) are arranged on each ammonia liquid conveying branch, and a compressed air regulating valve (5), a compressed air flowmeter (18) and a compressed air pressure gauge (20) are arranged on each compressed air branch; a flue gas online monitoring device (15) and an ammonia gas online monitoring device (16) are arranged in the tin smelting furnace flue (10); the ammonia control valve (8), the compressed air control valve (9), the ammonia regulating valve (6), the compressed air regulating valve (5), the ammonia flowmeter (17), the compressed air flowmeter (18), the ammonia pressure gauge (19), the compressed air pressure gauge (20), the flue gas online monitoring device (15) and the ammonia gas online monitoring device (16) are all connected with an automatic control system of the tin smelting furnace.
2. The flue gas denitration system of a tin smelting furnace according to claim 1, characterized in that, the ammonia liquor delivery branch (13) and the compressed air branch (14) are respectively provided with 8, constitute 8 to the combination of ammonia liquor delivery branch and compressed air branch, connect 8 atomizing spray guns (7) respectively, the front end interval sets up 2 atomizing spray guns in tin smelting furnace flue (10), the top interval sets up 2 atomizing spray guns, the rear end interval sets up 4 atomizing spray guns.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021110553.XU CN212440745U (en) | 2020-06-16 | 2020-06-16 | Flue gas denitration system of tin smelting furnace |
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| CN202021110553.XU CN212440745U (en) | 2020-06-16 | 2020-06-16 | Flue gas denitration system of tin smelting furnace |
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| CN212440745U true CN212440745U (en) | 2021-02-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111603921A (en) * | 2020-06-16 | 2020-09-01 | 云南锡业股份有限公司锡业分公司 | Flue gas denitration system and denitration method for tin smelting furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111603921A (en) * | 2020-06-16 | 2020-09-01 | 云南锡业股份有限公司锡业分公司 | Flue gas denitration system and denitration method for tin smelting furnace |
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