CN214020054U - High-temperature acid gas purification treatment device - Google Patents
High-temperature acid gas purification treatment device Download PDFInfo
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- CN214020054U CN214020054U CN202022145627.XU CN202022145627U CN214020054U CN 214020054 U CN214020054 U CN 214020054U CN 202022145627 U CN202022145627 U CN 202022145627U CN 214020054 U CN214020054 U CN 214020054U
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Abstract
The utility model discloses a high temperature acid gas purification unit, including the acid gas heat exchanger, first electromagnetism trip valve, second electromagnetism trip valve, first acid mist absorption tower, second acid mist absorption tower, the high temperature flue gas input of acid gas heat exchanger links to each other with industrial combustion or reaction equipment's exhaust pipe, the low temperature flue gas output of acid gas heat exchanger links to each other with the inlet end of first electromagnetism trip valve and second electromagnetism trip valve simultaneously, the end of giving vent to anger of first electromagnetism trip valve and second electromagnetism trip valve links to each other with the bottom air inlet of first acid mist absorption tower and second acid mist absorption tower respectively, the top gas outlet of first acid mist absorption tower and second acid mist absorption tower links to each other with the chimney of discharging fume simultaneously. The device has the advantages of simple structure, convenient operation, good effect and low cost, not only can purify various high-temperature acid gases at one time in the treatment process, but also can reach the discharge standard specified by the state by only using a small amount of water, and meets the requirement of direct exhaust treatment of waste gas in enterprises.
Description
Technical Field
The utility model relates to an exhaust emission environmental protection treatment equipment specifically indicates a high temperature acid gas purification unit.
Background
With the rapid development of national economy, various large-scale combustion equipment or chemical reaction equipment which are important foundations of national large-scale industrial construction are increasingly applied, the pollution degree of the smoke emitted by the equipment to the atmospheric environment is increasingly serious, the implementation of energy-saving and environment-friendly measures becomes an urgent priority, and numerous production enterprises with smoke, waste gas and tail gas emission face the environment-friendly upgrade of emission facilities. Among them, the discharge temperature of high-temperature acid gas is mostly in the range of 150 to 250 ℃, and the high-temperature acid gas is the most difficult to treat because of high temperature and strong corrosivity.
At present, most of the treatment modes of the high-temperature acid gas are spray absorption treatment in a water washing tower, but a large amount of acid wastewater is brought, and secondary pollution is caused to the environment. Moreover, in most cases, many pickling processes are carried out by mixing a plurality of acids, such as pickling, deplating, chemical polishing, surface passivation in the electroplating industry, etching in the electronic industry, and the like, and a plurality of acid gases are generated in the processes, and all pickling components are difficult to eradicate by only using the traditional water spray absorption. Meanwhile, the acid mist is low in treatment efficiency and large in water consumption due to the fact that only water is used for washing and absorbing, so that the treatment cost is increased, and the acid mist is difficult to reach the national emission standard once.
Disclosure of Invention
The utility model aims at providing a simple structure, convenient operation, respond well, low cost's high temperature acid gas purification unit, it not only can once only purify various high temperature acid gas in the processing procedure, only needs a small amount of water just can reach the emission standard of national regulation moreover, satisfies the direct vent of enterprise and handles the demand of waste gas.
In order to realize the above purpose, the utility model discloses a high temperature acid gas purification unit is applicable to and adsorbs the separation to the acid mist of discharge temperature in the industrial flue gas of 150 ~ 250 ℃ within range, and the device includes acid gas heat exchanger, first electromagnetism trip valve, second electromagnetism trip valve, first acid mist absorption tower, second acid mist absorption tower and the chimney of discharging fume, and its special character lies in:
the high-temperature flue gas input end of the acid gas heat exchanger is connected with a smoke exhaust pipeline of industrial combustion or reaction equipment, the low-temperature flue gas output end of the acid gas heat exchanger is simultaneously connected with the gas inlet ends of a first electromagnetic cut-off valve and a second electromagnetic cut-off valve, and the gas outlet ends of the first electromagnetic cut-off valve and the second electromagnetic cut-off valve are respectively connected with the gas inlet at the bottom of a first acid mist absorption tower and the gas inlet at the bottom of a second acid mist absorption tower;
the first acid mist absorption tower is characterized in that a first alkaline adsorbent layer is filled in the inner cavity of the first acid mist absorption tower, a second alkaline adsorbent layer is filled in the inner cavity of the second acid mist absorption tower, and the top air outlets of the first acid mist absorption tower and the second acid mist absorption tower are connected with a chimney.
The working principle of the utility model is as follows: firstly, high-temperature acid gas with the temperature of 150-250 ℃ from a smoke exhaust pipeline enters an acid gas heat exchanger, and is subjected to heat exchange by cooling water to be cooled to below 50 ℃ so as to meet the requirement of alkaline adsorption temperature; then, the low-temperature acid gas flows out of the acid gas heat exchanger, passes through the first electromagnetic cut-off valve or the second electromagnetic cut-off valve, enters the first acid mist absorption tower or the second acid mist absorption tower, and is adsorbed and purified by the first basic adsorbent layer or the second basic adsorbent layer; and finally, the clean gas from which the acid mist is removed flows out of the first acid mist absorption tower or the second acid mist absorption tower and is discharged to the atmosphere through a chimney. The first electromagnetic cut-off valve and the second electromagnetic cut-off valve are opened and closed alternately, so that the first acid mist absorption tower and the second acid mist absorption tower work alternately, and the continuous operation of the purification treatment device is ensured.
As a preferred scheme, a first spraying net is arranged at the top of the inner cavity of the first acid mist absorption tower and is connected with an external spraying water pipe through a first electromagnetic control valve; and a second spraying net is arranged at the top of the inner cavity of the second acid mist absorption tower and is also connected with an external spraying water pipe through a second electromagnetic control valve. Therefore, the adsorbent layer in the inner cavity of the absorption tower can be stabilized at the optimal adsorption temperature by spraying cooling water, and the absorption effect on acid mist is enhanced.
Furthermore, a first temperature sensor for detecting the temperature of an inner cavity of the first acid mist absorption tower is arranged on the first acid mist absorption tower, the signal output end of the first temperature sensor is connected with the input end of a first temperature indication controller, and the output end of the first temperature indication controller is connected with the control end of a first electromagnetic control valve; and a second temperature sensor for detecting the temperature of an inner cavity of the second acid mist absorption tower is arranged on the second acid mist absorption tower, the signal output end of the second temperature sensor is connected with the input end of a second temperature indication controller, and the output end of the second temperature indication controller is connected with the control end of a second electromagnetic control valve. Therefore, the temperature of the inner cavity of the absorption tower can be sensed in real time through the temperature sensor, so that the electromagnetic control valve is opened in time through the temperature indicating controller, and cooling water is sprayed to the inner cavity of the absorption tower.
Further, the first temperature sensors are provided in three, which are respectively disposed at the upper part, the middle part and the lower part of the first acid mist absorption tower; the second temperature sensors are arranged in three numbers and are respectively arranged at the upper part, the middle part and the lower part of the second acid mist absorption tower. Therefore, the temperature of different levels of the inner cavity of the absorption tower can be taken into consideration, so that the time and the dosage of spraying cooling water to the inner cavity of the absorption tower can be accurately controlled.
As a preferred scheme, the top gas outlets of the first acid mist absorption tower and the second acid mist absorption tower are simultaneously connected with the input end of a gas detection control instrument, and the output end of the gas detection control instrument is connected with a smoke-discharging chimney; and the signal output end of the gas detection controller is simultaneously connected with the control ends of the first electromagnetic cut-off valve and the second electromagnetic cut-off valve. Therefore, the component conditions of the discharged gas can be monitored in real time through the gas detection controller, and the switching of the first electromagnetic cut-off valve and the second electromagnetic cut-off valve can be controlled in time, so that the two absorption towers automatically and alternately work, and the continuous purification treatment of the acid gas is ensured.
Further, a first bypass standby valve is arranged between the air inlet end and the air outlet end of the first electromagnetic cut-off valve; and a second bypass standby valve is arranged between the air inlet end and the air outlet end of the second electromagnetic cut-off valve. Therefore, when any one electromagnetic cut-off valve fails, the corresponding bypass standby valve can be opened, and the stable operation of the whole device is ensured.
Furthermore, a first sewage draining valve is arranged at the air inlet end of the first electromagnetic cut-off valve; and a second blowoff valve is arranged at the air inlet end of the second electromagnetic cut-off valve. Therefore, when the pipeline is blocked, the corresponding blow-down valve can be opened to remove the dirt in time, and the pipeline is ensured to be smooth.
And furthermore, the acid gas heat exchanger is a high-temperature-resistant and corrosion-resistant steel shell-and-tube heat exchanger, and high-temperature flue gas from a smoke exhaust pipeline exchanges heat with cooling water in a shell pass through the tube pass. The steel shell-and-tube heat exchanger can effectively resist the corrosion of high-temperature pickling gas and prolong the service life of the device.
The utility model has the advantages of following several aspects:
firstly, the acid gas heat exchanger is adopted to cool the high-temperature acid gas to the temperature suitable for the absorption and purification of the alkaline adsorbent layer, the alkaline adsorbent layer is very convenient to use and operate, the adsorption and purification process can be automatically completed as long as the acid gas flows through the alkaline adsorbent layer, clean air is separated out, and the environmental pollution is reduced; especially, under the condition that a plurality of acid mist exist simultaneously, the acid mist spray absorption device can carry out one-time absorption, and the purification effect is far superior to that of the traditional spray water absorption device.
And secondly, the first acid mist absorption tower and the second acid mist absorption tower are controlled to work alternately through the first electromagnetic cut-off valve and the second electromagnetic cut-off valve, so that high-temperature acid gas can be continuously and stably treated, wherein the alkaline adsorbent layer has no special requirement on environmental conditions, and the cold north and the humid south can be applied without being managed by a specially-assigned person, so that the purification efficiency can be greatly improved.
Thirdly, the adsorption rate of the alkaline adsorbent layer can be designed according to the requirements of users, namely the purification efficiency of the alkaline adsorbent layer can be designed at will on the basis of meeting national and local environmental protection regulations. The alkaline adsorbent layer is neutral after saturated adsorption, is nontoxic and noncorrosive, and can be used as harmless garbage for road repair or pit filling.
Fourthly, first acid mist absorption tower and second acid mist absorption tower need not a large amount of spray water at the during operation, only need regularly change alkaline adsorbent layer, have effectively avoided traditional spraying absorbing device to produce the secondary pollution that a large amount of waste water lead to, have also effectively reduced the running cost.
Fifthly, the device has the advantages of simple structure, convenience in operation and high safety, can meet the requirement of direct exhaust treatment of the enterprise, and has good economical efficiency and wide application prospect.
Drawings
Fig. 1 is a schematic structural diagram of a high-temperature acid gas purification treatment device.
The components in the figures are numbered as follows: an acid gas heat exchanger 1 (wherein, a high-temperature flue gas input end 1a, a low-temperature flue gas output end 1b, a cooling water input end 1c and a cooling water output end 1 d); a first electromagnetic cut-off valve 2, a first bypass standby valve 2a and a first sewage draining valve 2 b; a second electromagnetic cut-off valve 3, a second bypass standby valve 3a and a second blowdown valve 3 b; a first acid mist absorption tower 4 (wherein: a first alkaline adsorbent layer 4a, a first spray net 4b, a first electromagnetic control valve 4c, a first temperature sensor 4d, a first temperature indication controller 4 e); a second acid mist absorption tower 5 (wherein: a second alkaline adsorbent layer 5a, a second spray net 5b, a second electromagnetic control valve 5c, a second temperature sensor 5d, a second temperature indication controller 5 e); a gas detection controller 6; a chimney 7; and an external spray header 8.
Detailed Description
The present invention is described in further detail below with reference to the following figures and specific examples, which should not be construed as limiting the invention.
As shown in fig. 1, the high-temperature acid gas purification treatment device described in this embodiment mainly includes an acid gas heat exchanger 1, a first electromagnetic cut-off valve 2, a second electromagnetic cut-off valve 3, a first acid mist absorption tower 4, a second acid mist absorption tower 5, a gas detection controller 6, a chimney 7, an external spray water pipe 8, and the like.
The acid gas heat exchanger 1 is a high-temperature-resistant corrosion-resistant steel shell-and-tube heat exchanger, a high-temperature flue gas input end 1a and a low-temperature flue gas output end 1b are respectively arranged on pipe boxes at two ends of the heat exchanger, a cooling water input end 1c and a cooling water output end 1d are respectively arranged on two sides of a shell of the heat exchanger, and the high-temperature flue gas exchanges heat with cooling water in a shell pass through the pipe pass. Specifically, an external cooling water source enters from a cooling water input end 1c and flows out from a cooling water output end 1 d; the high-temperature flue gas input end 1a is connected with a flue gas exhaust pipeline of industrial combustion or reaction equipment, the low-temperature flue gas output end 1b is simultaneously connected with the gas inlet ends of a first electromagnetic cut-off valve 2 and a second electromagnetic cut-off valve 3, and the gas outlet ends of the first electromagnetic cut-off valve 2 and the second electromagnetic cut-off valve 3 are respectively connected with the gas inlet at the bottom of a first acid mist absorption tower 4 and a second acid mist absorption tower 5; the first electromagnetic cut-off valve 2 and the second electromagnetic cut-off valve 3 are set in an open-close linkage state, so that the first acid mist absorption tower 4 and the second acid mist absorption tower 5 are also in a standby state when working one after the other, thus ensuring the continuous operation of the whole purification treatment device.
A first bypass standby valve 2a is arranged between the air inlet end and the air outlet end of the first electromagnetic shut-off valve 2, and a second bypass standby valve 3a is arranged between the air inlet end and the air outlet end of the second electromagnetic shut-off valve 3. When any one electromagnetic cut-off valve is in fault, the corresponding bypass standby valve can be opened, and the stable operation of the whole device is ensured. A first blow-off valve 2b is arranged at the air inlet end of the first electromagnetic shut-off valve 2, and a second blow-off valve 3b is arranged at the air inlet end of the second electromagnetic shut-off valve 3. When any one pipeline is blocked, the corresponding blow-down valve can be opened to remove dirt in time, so that the pipeline is ensured to be smooth.
A first alkaline adsorbent layer 4a is filled in the inner cavity of the first acid mist absorption tower 4, the adsorption material of the first alkaline adsorbent layer 4a can adopt calcium carbonate, the calcium carbonate is a weakly alkaline solid inorganic substance, is non-toxic and non-corrosive, and is neutral after being adsorbed and saturated; a first spraying net 4b is arranged at the top of the inner cavity of the first acid mist absorption tower 4, and the first spraying net 4b is connected with an external spraying water pipe 8 through a first electromagnetic control valve 4 c; the first acid mist absorption tower 4 is also provided with three first temperature sensors 4d for detecting the temperature of the inner cavity of the first acid mist absorption tower 4, and the three first temperature sensors 4d are respectively arranged at the upper part, the middle part and the lower part of the first acid mist absorption tower 4; the signal output ends of the three first temperature sensors 4d are all connected with the input end of a first temperature indication controller 4e, and the output end of the first temperature indication controller 4e is connected with the control end of a first electromagnetic control valve 4 c; when the first temperature indicating controller 4e detects that the temperature at any position exceeds a set value, the first electromagnetic control valve 4c can be instructed to be opened, and the first acid mist absorption tower 4 is sprayed and cooled through the first spraying net 4 b.
A second alkaline adsorbent layer 5a is filled in the inner cavity of the second acid mist absorption tower 5, and calcium carbonate can be adopted as the adsorbing material of the second alkaline adsorbent layer 5 a; a second spraying net 5b is arranged at the top of the inner cavity of the second acid mist absorption tower 5, and the second spraying net 5b is also connected with an external spraying water pipe 8 through a second electromagnetic control valve 5 c; the second acid mist absorption tower 5 is also provided with three second temperature sensors 5d for detecting the temperature of the inner cavity of the second acid mist absorption tower, and the three second temperature sensors 5d are respectively arranged at the upper part, the middle part and the lower part of the second acid mist absorption tower 5; the signal output ends of the three second temperature sensors 5d are all connected with the input end of a second temperature indication controller 5e, and the output end of the second temperature indication controller 5e is connected with the control end of a second electromagnetic control valve 5 c; when the second temperature indicating controller 5e detects that the temperature at any position exceeds a set value, the second electromagnetic control valve 5c can be instructed to be opened, and the second acid mist absorption tower 5 is sprayed and cooled through the second spraying net 5 b.
The top gas outlets of the first acid mist absorption tower 4 and the second acid mist absorption tower 5 are simultaneously connected with the input end of a gas detection controller 6, and the output end of the gas detection controller 6 is connected with a smoke exhaust chimney 7; and the signal output end of the gas detection controller 6 is simultaneously connected with the control ends of the first electromagnetic cut-off valve 2 and the second electromagnetic cut-off valve 3. When the gas detection controller 6 detects that the concentration of the acid mist in the gas subjected to adsorption treatment still exceeds a set value, the alkaline adsorbent layer in the corresponding absorption tower is in a saturated state, and at the moment, the first electromagnetic cut-off valve 2 and the second electromagnetic cut-off valve 3 are automatically controlled to be switched to be opened and closed, so that the first acid mist absorption tower 4 and the second acid mist absorption tower 5 are switched to be in a working state, and meanwhile, the alkaline adsorbent layer in the absorption tower which stops working can be replaced.
The utility model discloses when operation: high-temperature acid gas with the temperature of about 200 ℃ from a smoke exhaust pipeline enters the acid gas heat exchanger 1 from the high-temperature smoke input end 1a, and is cooled to below 50 ℃ through heat exchange by cooling water so as to meet the requirement of alkaline adsorption temperature. Then, the low-temperature acid gas flows out of the acid gas heat exchanger 1 from the low-temperature flue gas output end 1b, passes through the first electromagnetic cut-off valve 2 or the second electromagnetic cut-off valve 3, and enters the first acid mist absorption tower 4 or the second acid mist absorption tower 5 from the bottom. Then, the acid gas passes through the first basic adsorbent layer 4a or the second basic adsorbent layer 5a from bottom to top, and the acid mist therein is adsorbed and separated. And finally, the clean gas without acid mist flows out from the top of the first acid mist absorption tower 4 or the second acid mist absorption tower 5 and enters a gas detection controller 6, and the qualified gas is discharged to the atmosphere through a smoke exhaust chimney 7. The first temperature indication controller 4e or the second temperature indication controller 5e can respectively control the opening of the first electromagnetic control valve 4c or the second electromagnetic control valve 5c according to the detection result, so that the first acid mist absorption tower 4 or the second acid mist absorption tower 5 is sprayed and cooled through the first spraying net 4b or the second spraying net 5b to ensure the adsorption effect. The gas detection controller 6 can control the first electromagnetic cut-off valve 2 and the second electromagnetic cut-off valve 3 to be opened and closed alternately according to the detection result, so that the first acid mist absorption tower 4 and the second acid mist absorption tower 5 work alternately, and the continuous operation of the purification treatment device is ensured.
To sum up, with the aid of the above technical scheme of the utility model, not only can once only purify various types of high temperature acid gas, only need a small amount of water in addition just can reach the emission standard of national regulation, satisfy the direct vent of enterprise and handle the demand of waste gas. And simultaneously, the utility model has the advantages of being simple in structure and convenient in operation, respond well, low cost, concrete extensive application prospect.
The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements and the like made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. The utility model provides a high temperature acid gas purification unit, includes acid gas heat exchanger (1), first electromagnetism trip valve (2), second electromagnetism trip valve (3), first acid mist absorption tower (4), second acid mist absorption tower (5) and chimney (7) of discharging fume, its characterized in that:
the high-temperature flue gas input end (1a) of the acid gas heat exchanger (1) is connected with a smoke exhaust pipeline of industrial combustion or reaction equipment, the low-temperature flue gas output end (1b) of the acid gas heat exchanger (1) is simultaneously connected with the gas inlet ends of a first electromagnetic cut-off valve (2) and a second electromagnetic cut-off valve (3), and the gas outlet ends of the first electromagnetic cut-off valve (2) and the second electromagnetic cut-off valve (3) are respectively connected with the gas inlet ends at the bottoms of a first acid mist absorption tower (4) and a second acid mist absorption tower (5);
the flue gas purification device is characterized in that a first alkaline adsorbent layer (4a) is filled in the inner cavity of the first acid mist absorption tower (4), a second alkaline adsorbent layer (5a) is filled in the inner cavity of the second acid mist absorption tower (5), and the top gas outlets of the first acid mist absorption tower (4) and the second acid mist absorption tower (5) are simultaneously connected with a smoke exhaust chimney (7).
2. A high temperature acid gas purification treatment apparatus according to claim 1, wherein: a first spraying net (4b) is arranged at the top of the inner cavity of the first acid mist absorption tower (4), and the first spraying net (4b) is connected with an external spraying water pipe (8) through a first electromagnetic control valve (4 c); and a second spraying net (5b) is arranged at the top of the inner cavity of the second acid mist absorption tower (5), and the second spraying net (5b) is also connected with an external spraying water pipe (8) through a second electromagnetic control valve (5 c).
3. A high temperature acid gas purification treatment apparatus according to claim 2, wherein: a first temperature sensor (4d) for detecting the temperature of an inner cavity of the first acid mist absorption tower (4) is arranged on the first acid mist absorption tower, the signal output end of the first temperature sensor (4d) is connected with the input end of a first temperature indication controller (4e), and the output end of the first temperature indication controller (4e) is connected with the control end of a first electromagnetic control valve (4 c); and a second temperature sensor (5d) for detecting the temperature of the inner cavity of the second acid mist absorption tower (5) is arranged on the second acid mist absorption tower, the signal output end of the second temperature sensor (5d) is connected with the input end of a second temperature indication controller (5e), and the output end of the second temperature indication controller (5e) is connected with the control end of a second electromagnetic control valve (5 c).
4. A high temperature acid gas purification treatment apparatus according to claim 3, wherein: the three first temperature sensors (4d) are respectively arranged at the upper part, the middle part and the lower part of the first acid mist absorption tower (4); the number of the second temperature sensors (5d) is three, and the three second temperature sensors are respectively arranged at the upper part, the middle part and the lower part of the second acid mist absorption tower (5).
5. A high-temperature acid gas purification treatment apparatus according to any one of claims 1 to 4, characterized in that: the top gas outlets of the first acid mist absorption tower (4) and the second acid mist absorption tower (5) are simultaneously connected with the input end of a gas detection controller (6), and the output end of the gas detection controller (6) is connected with a smoke exhaust chimney (7); and the signal output end of the gas detection controller (6) is simultaneously connected with the control ends of the first electromagnetic cut-off valve (2) and the second electromagnetic cut-off valve (3).
6. A high-temperature acid gas purification treatment apparatus according to any one of claims 1 to 4, characterized in that: a first bypass standby valve (2a) is arranged between the air inlet end and the air outlet end of the first electromagnetic cut-off valve (2); and a second bypass standby valve (3a) is arranged between the air inlet end and the air outlet end of the second electromagnetic cut-off valve (3).
7. A high-temperature acid gas purification treatment apparatus according to any one of claims 1 to 4, characterized in that: a first blowdown valve (2b) is arranged at the air inlet end of the first electromagnetic cutoff valve (2); and a second blow-down valve (3b) is arranged at the air inlet end of the second electromagnetic cut-off valve (3).
8. A high-temperature acid gas purification treatment apparatus according to any one of claims 1 to 4, characterized in that: the acid gas heat exchanger (1) is a high-temperature-resistant corrosion-resistant steel shell-and-tube heat exchanger, and high-temperature flue gas from a smoke exhaust pipeline exchanges heat with cooling water in a shell pass through the tube pass.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022145627.XU CN214020054U (en) | 2020-09-25 | 2020-09-25 | High-temperature acid gas purification treatment device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022145627.XU CN214020054U (en) | 2020-09-25 | 2020-09-25 | High-temperature acid gas purification treatment device |
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| CN214020054U true CN214020054U (en) | 2021-08-24 |
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| CN202022145627.XU Active CN214020054U (en) | 2020-09-25 | 2020-09-25 | High-temperature acid gas purification treatment device |
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