CN108744876B - Activated carbon method flue gas purification device and purification process thereof - Google Patents
Activated carbon method flue gas purification device and purification process thereof Download PDFInfo
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- CN108744876B CN108744876B CN201810570609.0A CN201810570609A CN108744876B CN 108744876 B CN108744876 B CN 108744876B CN 201810570609 A CN201810570609 A CN 201810570609A CN 108744876 B CN108744876 B CN 108744876B
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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
- B01D53/02—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 by adsorption, e.g. preparative gas chromatography
- B01D53/04—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 by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40084—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by exchanging used adsorbents with fresh adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40086—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by using a purge gas
Abstract
The invention relates to the technical field of flue gas purification equipment, and particularly discloses an activated carbon flue gas purification device and a purification process thereof, wherein the activated carbon flue gas purification device comprises: the adsorption tower is provided with a flue gas inlet and a flue gas outlet; the activated carbon layer is arranged inside the adsorption tower; the discharger is arranged corresponding to the activated carbon layer one by one; the temperature sensing device is used for testing the temperature of the activated carbon layer; a resolution tower; the nitrogen tank is respectively connected with the adsorption tower and the desorption tower through pipelines; the first activated carbon conveying device is used for conveying the activated carbon unloaded by the unloader to the second feeding hole; and the second activated carbon conveying device is used for conveying the activated carbon flowing out of the desorption tower to the first feeding hole. After the activated carbon layer exceeded the settlement temperature, through the activated carbon rapid cycle activated carbon in the activated carbon layer of tripper with the overtemperature between analytical tower and adsorption tower to the activated carbon cooling in the analytical tower realizes the temperature regulation and control of activated carbon, guarantees safety in production, avoids the occurence of failure.
Description
Technical Field
The invention belongs to the technical field of flue gas purification equipment, and particularly relates to an activated carbon flue gas purification device and a purification process thereof.
Background
With the attention on air pollution, various industrial flue gas purification treatment technologies are rapidly developed. The existing purification treatment method for desulfurization can be mainly divided into a wet method and a dry method. Wet desulphurization is already mature and applied to industries such as steel, coking and the like, but the post-treatment problem caused by waste water and waste residue generated in the wet desulphurization process is difficult to solve. Dry desulfurization is increasingly used because it produces less waste. Denitration is mainly concentrated into an SCR catalytic method and an activated carbon method. The SCR catalyst comprises three types of high temperature, medium temperature and low temperature, and proper catalysts need to be selected according to different production processes and different flue gas characteristics. The activated carbon method for purifying the flue gas is a purification technology with strong adaptability to the flue gas, and the process is mature in the steel industry at present, and can be used for simultaneously removing SO in the flue gas2And NOxIt also has the advantages of no water consumption, no secondary pollution, effective removal of pollutants such as dust, heavy metals (such as mercury) and the like in the flue gas,Can regenerate and recycle sulfur resources and the like, and can be well applied to the fields of coke ovens, cement, glass, waste incineration and the like.
With the lapse of time, the technological route of desulfurization and denitrification by activated carbon method is mature, and the process system equipment is gradually optimized. The temperature of the operation of the flue gas purification process by the activated carbon method is controlled to be about 120 ℃, the service life of the activated carbon is influenced by overhigh temperature, and a tower body can be burnt seriously to cause production accidents. Temperature control and over-temperature handling of the process is therefore very important. However, in the prior art, designers do not take systematic consideration for measures for coping with high temperature danger that may occur during actual application, which leads to increased production risk of enterprises during actual application.
The invention discloses a flue gas desulfurization and denitration process combining ammonia desulfurization and activated carbon denitration, wherein the ammonia desulfurization is a mature wet desulfurization process, the activated carbon denitration is a dry denitration process, and activated carbon is recycled in the process, namely, the activated carbon is adsorbed and saturated and then is desorbed by a regeneration tower, so that the functions of desulfurization, denitration, dust removal, mercury removal and volatile organic compounds are realized simultaneously. However, the operational reliability of the adsorption column is not considered, and the safety of the process is not considered.
The invention patent CN202638235U discloses a blanking device for controlling active carbon to uniformly descend at a certain speed, wherein an inverted splayed or conical fluid director is arranged at a neck-type outlet, so that the flow velocity of the active carbon with higher flow velocity in the middle is reduced to be consistent with that of the active carbon at the edge, the uniform absorption of the active carbon is ensured, the local active carbon is prevented from over-temperature ignition, however, the operation reliability of an adsorption tower is not considered, and the safety measures of the process are less considered.
Numerous designs do not specify a treatment method when the temperature of the activated carbon inside the tower body of the adsorption tower is too high, and the design is not considered in the whole design of the tower body.
Therefore, there is a need for an activated carbon flue gas purification device and a purification process thereof to solve the above problems.
Disclosure of Invention
The invention aims to: provides an activated carbon method flue gas purification device and a purification process thereof, which aim to solve the potential safety hazard caused by overhigh temperature of activated carbon in the tower body of an adsorption tower.
On one hand, the invention provides an activated carbon method flue gas purification device, which comprises an adsorption tower, wherein a flue gas inlet, a flue gas outlet, a first feeding hole and a first discharging hole are formed in the adsorption tower; the activated carbon purification part comprises a plurality of activated carbon layers which are arranged in the adsorption tower side by side, the upper end and the lower end of each activated carbon layer are respectively connected with the first feed port and the first discharge port, and flue gas enters the adsorption tower from the flue gas inlet and is discharged from the flue gas outlet after passing through the activated carbon layers; the discharger is arranged in one-to-one correspondence with the activated carbon layer, is positioned below the adsorption tower and is connected with the activated carbon layer, and is used for discharging the activated carbon in the activated carbon layer; the temperature sensing device is connected with the controller, and at least one temperature sensing device is arranged corresponding to each activated carbon layer; the desorption tower is provided with a second feeding hole and a second discharging hole; the nitrogen tank is respectively connected with the adsorption tower and the desorption tower through pipelines; the first activated carbon conveying device is used for conveying the activated carbon unloaded by the unloader to the second feeding hole; and the second activated carbon conveying device is used for conveying the activated carbon flowing out of the desorption tower to the first feeding hole.
Preferably, the flue gas purification device by an activated carbon method further comprises a first activated carbon bin and a second activated carbon bin, wherein the first activated carbon bin is arranged above the adsorption tower, and the outlet end of the first activated carbon bin is connected with the first feed inlet; the second activated carbon bin is positioned above the desorption tower, and the outlet end of the second activated carbon bin is connected with the second feed inlet; the first activated carbon conveying device is used for conveying the activated carbon unloaded by the unloader to the second activated carbon bin, and the second activated carbon conveying device is used for conveying the activated carbon flowing out of the desorption tower to the first feeding hole.
Preferably, the flue gas purification device by the activated carbon method further comprises a chute and a second control valve for controlling the opening degree of the outlet end of the first activated carbon bin; the chute is installed the adsorption tower top, the one end of chute bottom with first feed inlet is connected, second active carbon conveyor be used for with the active carbon that the analytic tower flowed out carries extremely first active carbon storehouse or the chute.
Preferably, the active carbon purification part divides the cavity inside the adsorption tower into a first chamber and a second chamber which are not communicated with each other; the flue gas inlet with first cavity intercommunication, the exhanst gas outlet with second cavity intercommunication, perhaps, the flue gas inlet with the exhanst gas outlet all with first cavity intercommunication, the flue gas inlet is located the below of exhanst gas outlet, and the flue gas inlet with be equipped with the baffle between the exhanst gas outlet, the baffle level sets up and will two spaces that do not communicate each other are separated into to first cavity.
Preferably, the activated carbon purification portion further comprises a plurality of partition plates arranged side by side, each layer of the partition plates are arranged on two sides of the activated carbon layer, a plurality of through holes are formed in each partition plate, and the aperture of each through hole is smaller than the outer diameter of the activated carbon.
Preferably, the activated carbon method flue gas purification device further comprises a vibrating screen, the vibrating screen is located between the desorption tower and the second activated carbon conveying device, and the vibrating screen is connected with the second discharge hole.
Preferably, the activated carbon method flue gas purification device further comprises an alarm device.
Preferably, the nitrogen tank is respectively connected with the top and the bottom of the desorption tower through pipelines.
On the other hand, the invention also provides a purification process of the activated carbon method flue gas purification device in any one of the above schemes, which comprises the following steps: and judging whether the temperature detected by the temperature sensing device exceeds a first set temperature, if so, circulating the activated carbon in the activated carbon layer corresponding to the temperature sensing device in the adsorption tower and the analysis tower, and cooling the activated carbon through the analysis tower when the activated carbon circulates to the analysis tower.
Preferably, the process of circulating the activated carbon in the adsorption column and the desorption column comprises: controlling a nitrogen tank to fill nitrogen into the analysis tower; unloading the activated carbon in the activated carbon layer through the unloader, and conveying the unloaded activated carbon to a second feed port through a first activated carbon conveying device; and conveying the activated carbon flowing out of the desorption tower to a first feeding hole through a second activated carbon conveying device.
The invention has the beneficial effects that: the real-time temperature of each activated carbon layer is detected through the temperature sensing devices, after the temperature detected by one or more temperature sensing devices exceeds a first set temperature, the activated carbon in the activated carbon layer exceeding the first set temperature is rapidly circulated between the adsorption tower and the analysis tower, and the activated carbon is cooled through the analysis tower. The circulation process comprises the steps that nitrogen is filled into the adsorption tower through a nitrogen tank, oxygen in the adsorption tower is blown away, the temperature of the activated carbon is reduced preliminarily, the protection effect is achieved, on the other hand, the vibration frequency of an unloader corresponding to the activated carbon layer with the temperature exceeding the first set temperature is improved, the activated carbon in the activated carbon layer is unloaded into the first activated carbon conveying device quickly, then the activated carbon is conveyed into the analysis tower quickly through the first activated carbon conveying device, the temperature of the activated carbon is reduced under the blowing effect of the nitrogen through the nitrogen filled into the analysis tower, and the cooled activated carbon is conveyed into the adsorption tower through the second activated carbon conveying device and is supplemented into the corresponding activated carbon layer.
Drawings
FIG. 1 is a first schematic structural diagram of a flue gas purification apparatus using an activated carbon method according to an embodiment of the present invention;
FIG. 2 is an enlarged view of the flue gas purification apparatus A by activated carbon method shown in FIG. 1;
fig. 3 is a schematic structural diagram of a flue gas purification device by an activated carbon method in the embodiment of the invention.
In the figure:
1. an adsorption tower; 101. a flue gas inlet; 102. a flue gas outlet; 103. a first cavity; 104. a second cavity;
2. an activated carbon purification section; 201. an activated carbon layer; 202. a partition plate;
3. a discharger;
4. a first activated carbon bin;
5. a chute;
6. second control valve
7. A resolution tower;
8. a nitrogen tank;
9. a first activated carbon delivery device;
10. a second activated carbon delivery device;
11. a second activated carbon bin;
12. vibrating screen;
13. a baffle plate;
14. and a third control valve.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 to 3, the present embodiment provides an activated carbon method flue gas purification apparatus, which includes an adsorption tower 1, an activated carbon purification unit 2, a discharger 3, a temperature sensing device (not shown in the drawings), a first activated carbon bin 4, a chute 5, an analytical tower 7, a nitrogen tank 8, a first activated carbon conveying device 9, a second activated carbon conveying device 10, a second activated carbon bin 11, and a vibrating screen 12.
The adsorption tower 1 is provided with a flue gas inlet 101, a flue gas outlet 102, a first feed inlet and a first discharge outlet which are communicated with the inner cavity of the adsorption tower, the flue gas inlet 101 is provided with a first valve, and the first valve can control the opening degree of the flue gas inlet 101. In this embodiment, the body of the adsorption tower 1 is cubic. The length of the tower body is 2m-9m, such as 2m, 4m, 6m, 8m or 9 m; a width of 3m to 6m, such as 3m, 4m, 5m, or 6m, etc.; the height is 8m to 40m, for example, 8m, 14m, 20m, 28m or 36m, etc., and the shape of the adsorption tower 1 and the specific size of the adsorption tower 1 are not limited in this embodiment, and the shape and the specific size of the adsorption tower 1 may be adjusted accordingly according to actual needs.
Activated carbon purification portion 2 sets up inside adsorption tower 1, and activated carbon purification portion 2 includes the activated carbon layer 201 that the multilayer set up side by side and the baffle 202 that the multilayer set up side by side, forms activated carbon layer 201 through filling activated carbon between adjacent two-layer baffle 202. The separator 202 is provided with a plurality of through holes, and the aperture of the through holes is based on that the activated carbon cannot pass through the through holes, for example, the diameter of the activated carbon is 5mm, and the aperture of the through holes is 4 mm.
In this embodiment, the activated carbon purification part 2 divides the cavity inside the adsorption tower 1 into a first cavity 103 and a second cavity 104 which are not communicated with each other, as shown in fig. 1, the flue gas inlet 101 is located below the flue gas outlet 102, the flue gas inlet 101 is communicated with the first cavity 103, and the flue gas outlet 102 is communicated with the second cavity 104. The flue gas enters the first cavity 103 from the flue gas inlet 101, enters the second cavity 104 after passing through the activated carbon purification part 2, is finally discharged from the flue gas outlet 102, and is purified by the activated carbon layer 201 in the activated carbon purification part 2. Certainly, the flue gas inlet 101 and the flue gas outlet 102 can also be arranged on the same side of the adsorption tower 1, as shown in fig. 3, the flue gas inlet 101 and the flue gas outlet 102 are both communicated with the first cavity 103, the flue gas inlet 101 is close to the bottom of the adsorption tower 1, the flue gas outlet 102 is close to the top of the adsorption tower 1, meanwhile, a horizontally arranged baffle 13 is installed between the flue gas inlet 101 and the flue gas outlet 102, the first cavity 103 is divided into an upper space and a lower space which are not communicated with each other by the baffle 13, flue gas enters the space at the lower part of the first cavity 103 from the flue gas inlet 101, enters the second cavity 104 through the activated carbon purification part 2, then enters the space at the upper part of the first cavity 103 through the activated carbon purification part 2, and finally is discharged from the flue gas outlet 102. Of course, the flue gas inlet 101 and the flue gas outlet 102 may both communicate with the second cavity 104.
In this embodiment, the total thickness of the activated carbon layers 201 in the activated carbon purification section 2 is 1.5m to 2 m. According to different thicknesses, different layering modes can be designed, the actual smoke characteristics and the actual working conditions are combined, and the thickness of each activated carbon layer 201 is 14-35 cm, specifically, 14cm, 20cm, 25cm, 30cm, 35cm and the like. For example, in the case where the total thickness of the activated carbon layer 201 is 2m, the activated carbon layer 201 may be divided into 6 layers, 7 layers, 8 layers, 9 layers, or 10 layers. When the activated carbon layer 201 is divided into 10 layers, the thickness of each layer is 20 cm; when the activated carbon is divided into 9 layers, the thickness of each layer is 14cm, 20cm, 25cm and 25cm in sequence along the flow direction of the flue gas at the flue gas inlet 101; when the activated carbon is divided into 8 layers, the thickness of each layer is 25 cm; when the activated carbon is divided into 7 layers, the thickness of each layer is 14cm, 25cm and 35cm along the flowing direction of the flue gas at the flue gas inlet 101; when the activated carbon layer 201 is divided into 6 layers, the thicknesses of the layers are 25cm, 35cm and 35cm in sequence along the flow direction of the smoke at the smoke inlet 101. For another example, in the case where the activated carbon layer 201 has a thickness of 1.5m, the activated carbon layer 201 may be divided into 5 layers, 6 layers, or 7 layers. When the activated carbon is divided into 7 layers, the thickness of each layer is 20cm, 20cm and 30cm in sequence along the flow direction of the flue gas at the flue gas inlet 101; when the activated carbon was divided into 6 layers in total, the thickness of each layer was 25 cm. When the activated carbon is divided into 5 layers, the thickness of each layer is 14cm, 30cm, 35cm and 35cm along the flowing direction of the smoke at the smoke inlet 101.
The temperature sensing device is connected with a controller (not shown in the drawings), at least one temperature sensing device is arranged corresponding to each activated carbon layer 201, and the temperature sensing device is used for detecting the actual temperature of the activated carbon layer 201. For example, one temperature sensing device may be provided at intervals of 2m in the vertical direction.
The discharger 3 is arranged corresponding to the activated carbon layer 201 one by one, the discharger 3 is positioned below the adsorption tower 1, specifically, the discharger 3 is positioned at the position of the first discharge port, and the discharger 3 is used for discharging the activated carbon in the corresponding activated carbon layer 201; the speed of unloading the activated carbon by the unloader 3 can be controlled by controlling the working frequency of the unloader 3, and the working frequency of the unloader 3 is in direct proportion to the speed of unloading the activated carbon.
The first activated carbon bin 4 is arranged above the adsorption tower 1, the outlet end of the first activated carbon bin is connected with the first feed inlet, and the outlet end of the first activated carbon bin 4 is further provided with a second control valve 6 for controlling the opening degree of the outlet end.
The chute 5 is also arranged above the adsorption tower 1, and one end of the bottom of the chute 5 is connected with the first feed inlet.
The top of the desorption tower 7 is provided with a second feeding hole, the bottom of the desorption tower is provided with a second discharging hole, a second activated carbon bin 11 is arranged above the desorption tower 7, the outlet end of the second activated carbon bin 11 is connected with the second feeding hole, and the outlet end of the second activated carbon bin 11 is also provided with a third control valve 14 for controlling the opening degree of the second activated carbon bin. The vibrating screen 12 is arranged below the desorption tower 7 and is positioned under the second discharge hole, and the active carbon flowing out of the desorption tower 7 can enter the vibrating screen 12 and is separated out of unqualified active carbon slag through the vibrating screen 12.
And the nitrogen tank 8 is respectively connected with the top and the bottom of the analysis tower 7 through pipelines and is also respectively connected with the top and the bottom of the adsorption tower 1 through pipelines, and it can be understood that one end of each pipeline connected with the nitrogen tank 8 is provided with a control valve connected with a controller, and the circulation of gas can be controlled or closed through the control valve.
The first activated carbon conveying device 9 and the second activated carbon conveying device 10 are both used for conveying activated carbon between the adsorption tower 1 and the desorption tower 7, in the embodiment, the first activated carbon conveying device 9 and the second activated carbon conveying device 10 are both chain bucket machines, and activated carbon can be circulated between the adsorption tower 1 and the desorption tower 7 through the first activated carbon conveying device 9 and the second activated carbon conveying device 10. The tripper 3 unloads the active carbon in the active carbon layer 201 that corresponds, can be received by first active carbon conveyor 9, and transport second active carbon storehouse 11 by first active carbon conveyor 9, the active carbon flows into desorption tower 7 through second active carbon storehouse 11, the purge gas that lets in through nitrogen tank 8 in desorption tower 7 cools off, the active carbon after the cooling flows into shale shaker 12 in, correspondingly, second active carbon conveyor 10 can receive the active carbon that shale shaker 12 flows out, and transport first active carbon storehouse 4 or chute 5 with it, the active carbon in first active carbon storehouse 4 or the chute 5 enters into the active carbon layer 201 that needs to supply through first feed inlet.
An alarm device (not shown in the figures) is connected with the controller, and when the temperature sensing device detects that the temperature in the activated carbon layer 201 exceeds a first set temperature, the alarm device gives an alarm to remind an operator.
The embodiment also provides a purification process of the activated carbon flue gas purification device, which comprises the following steps:
judging whether the temperature detected by the temperature sensing device exceeds a first set temperature, if so, circulating the activated carbon in the activated carbon layer 201 corresponding to the temperature sensing device in the adsorption tower 1 and the analysis tower 7, and when the activated carbon circulates to the analysis tower 7, cooling the activated carbon through the analysis tower 7.
Specifically, the method comprises the following steps:
s10: the temperature sensing means detects the real-time temperature T1 of the activated carbon layer 201 and sends it to the controller.
S20: the controller judges the real-time temperature T1 and a first set temperature T2 prestored therein, wherein the first set temperature T2 is the upper limit of the normal use temperature of the activated carbon.
S30: if T1 is not more than T2, all the activated carbon in the activated carbon layer 201 is circulated between the adsorption tower 1 and the desorption tower 7, and the activated carbon is desorbed and cooled by the desorption tower 7.
1) And controlling a nitrogen tank 8 to fill nitrogen into the desorption tower 7.
2) All of the dischargers 3 are operated at a low frequency, and the activated carbon in all of the activated carbon layers 201 is discharged by the dischargers 3 to the first activated carbon conveying device 9 at a first speed.
3) And the first activated carbon conveying device 9 conveys the activated carbon to the second activated carbon bin 11.
4) And the activated carbon in the second activated carbon bin 11 flows into the desorption tower 7, is purged by nitrogen in the desorption tower 7, is cooled, and then flows into the vibrating screen 12.
5) And the vibrating screen 12 screens off unqualified activated carbon slag, and qualified activated carbon flows into the second activated carbon conveying device 10.
6) And the second activated carbon conveying device 10 conveys the activated carbon to the first activated carbon bin 4.
7) The activated carbon in the first activated carbon bin 4 is supplemented into the activated carbon layer 201 needing to be supplemented through the first feeding hole.
S40: step S10 is repeated.
S50: if T1 is greater than T2, the controller gives an alarm through the alarm device.
S60: and closing the first control valve and stopping filling the flue gas into the adsorption tower 1.
S70: the nitrogen tank 8 is made to fill nitrogen into the adsorption tower 1, and oxygen in the adsorption tower 1 is discharged through the filled nitrogen, so that the activated carbon is protected, and the activated carbon exceeding the first set temperature T2 can be primarily cooled.
S80: the activated carbon is circulated between the adsorption tower 1 and the desorption tower 7, and the temperature of the activated carbon is lowered by the desorption tower 7.
1) And controlling a nitrogen tank 8 to fill nitrogen into the desorption tower 7.
2) And increasing the working frequency of the discharger 3 corresponding to the activated carbon layer 201 exceeding the first set temperature T2, stopping the other dischargers 3, and discharging the activated carbon in the activated carbon layer 201 exceeding the first set temperature T2 to the first activated carbon conveying device 9 at a second speed by the discharger 3, wherein the second speed is far greater than the first speed.
3) And the first activated carbon conveying device 9 conveys the activated carbon to the second activated carbon bin 11.
4) And the activated carbon flows into the desorption tower 7 through the second activated carbon bin 11, and the activated carbon is blown by nitrogen in the desorption tower 7, is cooled and then flows into the vibrating screen 12.
5) And the vibrating screen 12 screens off unqualified activated carbon slag, and qualified activated carbon flows into the second activated carbon conveying device 10.
6) The second activated carbon delivery device 10 delivers activated carbon to the chute 5 and closes the second control valve 6.
7) The activated carbon is supplemented into the activated carbon layer 201 needing to be supplemented through the chute 5 and the first feeding hole. Can realize the quick travel to the active carbon of high temperature through chute 5 to avoided mixing with the active carbon in first active carbon storehouse 4, and then realized circulating fast between adsorption tower 1 and desorption tower 7 to the active carbon of high temperature part.
S90: the temperature sensing device detects the real-time temperature T1 of the activated carbon layer 201 and sends the real-time temperature T1 to the controller, the controller judges the real-time temperature T1 and the second preset temperature T3 of the activated carbon layer 201, if the T1 is not less than T3, the step S80 is repeated, if the T1 is less than T3, the nitrogen tank 8 stops filling nitrogen into the adsorption tower 1, meanwhile, the first control valve is opened, and the step S10 is repeated.
The first preset temperature T1 is greater than the second preset temperature T3, and when T1 < T3, the temperature of the activated carbon is reduced to a safe range.
According to the activated carbon method flue gas purification device and the purification process thereof provided by the embodiment, when the temperature inside the activated carbon in the activated carbon layer 201 is too high and an alarm is given, the first control valve of the flue gas inlet 101 is closed, and meanwhile, the vibration frequency of the discharger 3 at the bottom of the activated carbon layer 201 corresponding to the alarm point is increased, so that the activated carbon can be unloaded quickly. And opening a valve on a pipeline leading to the adsorption tower 1 from the nitrogen tank 8, and introducing nitrogen into the adsorption tower 1 to carry out primary cooling on the activated carbon. The second activated carbon conveying device 10 directly conveys the activated carbon to the chute 5, and the second control valve 6 is closed, so that the activated carbon directly and rapidly moves through the chute 5, and finally the activated carbon rapidly circulates in the adsorption tower 1 and the desorption tower 7. The flue gas purification device by the activated carbon method and the purification process thereof can effectively reduce the temperature of the activated carbon with too high temperature, protect the adsorption tower 1 and improve the process stability and safety.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (6)
1. A purification process of an activated carbon method flue gas purification device comprises an adsorption tower (1) which is provided with a flue gas inlet (101), a flue gas outlet (102), a first feed inlet and a first discharge outlet; the activated carbon purification part (2) comprises a plurality of activated carbon layers (201) which are arranged in the adsorption tower (1) side by side, the upper end and the lower end of each activated carbon layer (201) are respectively connected with the first feed port and the first discharge port, and flue gas enters the adsorption tower (1) from the flue gas inlet (101) and is discharged from the flue gas outlet (102) after passing through the activated carbon layers (201); the discharger (3) and the activated carbon layer (201) are arranged in a one-to-one correspondence mode, the discharger (3) is located below the adsorption tower (1) and connected with the activated carbon layer (201), and the discharger (3) is used for discharging activated carbon in the activated carbon layer (201); the temperature sensing device is connected with the controller, and at least one temperature sensing device is arranged corresponding to each activated carbon layer (201); the analysis tower (7) is provided with a second feeding hole and a second discharging hole; the nitrogen tank (8) is respectively connected with the adsorption tower (1) and the desorption tower (7) through pipelines, the nitrogen tank (8) is used for inputting nitrogen into the desorption tower (7) so as to cool the activated carbon in the desorption tower (7), and the nitrogen tank (8) is used for inputting nitrogen into the adsorption tower (1) so as to cool the activated carbon in the adsorption tower (1); the first activated carbon conveying device (9) is used for conveying the activated carbon unloaded by the unloader (3) to the second feeding hole; the second activated carbon conveying device (10) is used for conveying the activated carbon flowing out of the desorption tower (7) to the first feeding hole; an alarm device; the device comprises a first activated carbon bin (4) and a second activated carbon bin (11), wherein the first activated carbon bin (4) is arranged above the adsorption tower (1), and the outlet end of the first activated carbon bin is connected with the first feed inlet; the second activated carbon bin (11) is positioned above the desorption tower (7), and the outlet end of the second activated carbon bin is connected with the second feed inlet; the first activated carbon conveying device (9) is used for conveying the activated carbon unloaded by the unloader (3) to the second activated carbon bin (11), and the second activated carbon conveying device (10) is used for conveying the activated carbon flowing out of the desorption tower (7) to the first feeding hole; the device comprises a chute (5) and a second control valve (6) used for controlling the opening degree of an outlet end of the first activated carbon bin (4), wherein the chute (5) is installed above the adsorption tower (1), one end of the bottom of the chute (5) is connected with the first feed inlet, and a second activated carbon conveying device (10) is used for conveying activated carbon flowing out of the desorption tower (7) to the first activated carbon bin (4) or the chute (5);
the method is characterized in that the purification process of the flue gas purification device by the activated carbon method comprises the following steps:
judging whether the temperature detected by the temperature sensing device exceeds a first set temperature, if so, circulating the activated carbon in the activated carbon layer (201) corresponding to the temperature sensing device in the adsorption tower (1) and the desorption tower (7), and when the activated carbon circulates to the desorption tower (7), cooling the activated carbon through the desorption tower (7);
when the internal temperature of the activated carbon in the activated carbon layer (201) is too high and an alarm is given, closing the first control valve of the flue gas inlet (101), and simultaneously opening the vibration frequency of the discharger 3 at the bottom of the activated carbon layer (201) corresponding to the alarm point, so that the activated carbon can be quickly unloaded; opening a valve on a pipeline leading from the nitrogen tank (8) to the adsorption tower (1), and introducing nitrogen into the adsorption tower (1) to carry out primary cooling on the activated carbon; the second activated carbon conveying device (10) directly conveys the activated carbon to the chute (5), and the second control valve (6) is closed, so that the activated carbon directly and rapidly moves through the chute (5), and finally the activated carbon rapidly circulates in the adsorption tower (1) and the desorption tower (7).
2. The purification process of flue gas purification device by activated carbon method according to claim 1, wherein the process of circulating activated carbon in the adsorption tower (1) and the desorption tower (7) comprises:
controlling a nitrogen tank (8) to fill nitrogen into the desorption tower (7);
unloading the activated carbon in the activated carbon layer (201) through the unloader (3), and conveying the unloaded activated carbon to a second feeding hole through a first activated carbon conveying device (9);
and conveying the activated carbon flowing out of the desorption tower (7) to a first feeding hole through a second activated carbon conveying device (10).
3. The purification process of the flue gas purification device by the activated carbon method according to claim 1, wherein the activated carbon purification part (2) divides the cavity inside the adsorption tower (1) into a first chamber and a second chamber which are not communicated with each other;
the flue gas inlet (101) is in communication with the first chamber and the flue gas outlet (102) is in communication with the second chamber, or,
flue gas inlet (101) with flue gas outlet (102) all with first cavity intercommunication, flue gas inlet (101) are located the below of flue gas outlet (102), and flue gas inlet (101) with be equipped with baffle (13) between flue gas outlet (102), baffle (13) level sets up and will two spaces that do not communicate each other are separated into to first cavity.
4. The purification process of the activated carbon-based flue gas purification device according to claim 1, wherein the activated carbon purification part (2) further comprises a plurality of side-by-side partition plates (202), a layer of the partition plate (202) is arranged on each side of the activated carbon layer (201), a plurality of through holes are arranged on the partition plate (202), and the aperture of the through holes is smaller than the outer diameter of the activated carbon.
5. The purification process of the activated carbon method flue gas purification device according to claim 1, further comprising a vibrating screen (12), wherein the vibrating screen (12) is located between the desorption tower (7) and the second activated carbon conveying device (10), and the vibrating screen (12) is connected with the second discharge port.
6. The purification process of the flue gas purification device by the activated carbon method according to claim 1, wherein the nitrogen tank (8) is respectively connected with the top and the bottom of the desorption tower (7) through pipelines.
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