CN210021735U - A dust centralized processing system for carbon-based catalytic process flue gas desulfurization denitrification facility - Google Patents
A dust centralized processing system for carbon-based catalytic process flue gas desulfurization denitrification facility Download PDFInfo
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- CN210021735U CN210021735U CN201920526429.2U CN201920526429U CN210021735U CN 210021735 U CN210021735 U CN 210021735U CN 201920526429 U CN201920526429 U CN 201920526429U CN 210021735 U CN210021735 U CN 210021735U
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 41
- 230000023556 desulfurization Effects 0.000 title claims abstract description 41
- 239000003546 flue gas Substances 0.000 title claims abstract description 32
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000012545 processing Methods 0.000 title claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims description 65
- 229910052799 carbon Inorganic materials 0.000 title claims description 64
- 230000003197 catalytic effect Effects 0.000 title description 11
- 239000000843 powder Substances 0.000 claims abstract description 69
- 239000003054 catalyst Substances 0.000 claims abstract description 62
- 238000007599 discharging Methods 0.000 claims abstract description 40
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- 238000009423 ventilation Methods 0.000 claims abstract description 20
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- 239000003610 charcoal Substances 0.000 claims abstract description 10
- 238000005815 base catalysis Methods 0.000 claims abstract 3
- 239000000463 material Substances 0.000 claims description 39
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Abstract
The utility model discloses a dust centralized processing system for charcoal base catalysis method flue gas desulfurization denitrification facility, including environment dust pelletizing system, dust collecting system and dust outer discharge system. The environment dust removal system comprises a dust removal pipeline, a first ventilation opening, a first manual valve, a first air draft point, a second manual valve, a first bag-type dust remover, a centrifugal fan and a first dust discharge valve. The dust collecting system comprises a dust collecting pipeline, a second ventilation opening, a screening bin, a gravity dust collector, a second bag-type dust collector, a Roots blower, a second ash discharging valve and a third ash discharging valve. The dust discharge system sequentially comprises a powder bin, a fourth ash discharge valve, a telescopic chute and a tank car hermetically butted with the telescopic chute. The utility model provides a dust centralized processing system and method can effectively collect the tiny granule dust that charcoal base catalyst produced at SOx/NOx control device circulation process, guarantees adsorption tower gas permeability and adsorption efficiency, simple structure, take up an area of less, resources are saved.
Description
Technical Field
The utility model belongs to the environmental engineering field relates to flue gas desulfurization denitrification facility's dust centralized processing system, concretely relates to a dust centralized processing system for carbon-based catalysis method flue gas desulfurization denitrification facility.
Background
The flue gas combined desulfurization and flue gas pollutant removal control technology using the carbon-based catalyst as the adsorbent and the catalyst can realize the integration of desulfurization, denitration, demercuration, heavy metal removal and dust removal and eliminate white smoke. The technology does not consume water basically, saves a large amount of water resources, and the desulfurization byproduct is high-concentration SO2The method is convenient for resource utilization, belongs to a deep purification technology, is a new generation flue gas pollutant control technology with obvious advantages, and has great application prospect in a plurality of fields such as electric power, steel, smelting, waste incineration and the like.
The technical principle of the flue gas desulfurization and denitrification by the carbon-based catalytic method is as follows: SO in the flue gas under the adsorption and catalysis of the carbon-based catalyst2And O2And H2O reacts to generate H2SO4，H2SO4Adsorbing on the micropores and the surface of the carbon-based catalyst, and simultaneously utilizing the catalytic performance of the carbon-based catalyst, NO in the flue gasxCarrying out catalytic reduction reaction with diluted ammonia gas to generate N2The desulfurization and denitration of the flue gas are realized, and the carbon-based catalyst after the adsorption and catalytic reaction is regenerated and recycled.
As shown in fig. 1, in the desulfurization and denitrification process by the carbon-based catalytic method, a booster fan sends raw flue gas into a desulfurization and denitrification tower, and the raw flue gas is discharged from a chimney after being purified. Injecting diluted ammonia gas, usingIn the denitration reaction of the flue gas purification process, NO in the flue gas is removedxConversion to N2. The carbon-based catalyst which is discharged from the desulfurization and denitrification tower and is saturated in adsorption and the fresh carbon-based catalyst which is supplemented in the storage bin enter the regeneration tower through the first conveyor and are discharged after regeneration. The vibrating screen screens out the carbon-based catalyst powder, and qualified carbon-based catalyst particles enter the desulfurization and denitrification tower through the second conveyor to complete a material circulation.
The carbon-based catalytic flue gas purification technology adopts coal active coke, and the particle size of the fresh active coke which is filled or supplemented for the first time isThe activated coke was in a relatively stable particle size composition after ten cycles of the initial charge cycle, with a particle size distribution as shown in table 1. In the material circulation process, fine particle dust is generated due to abrasion and falling, and the vibrating screen screens out dust with the particle size smaller than 1.2mm so as to ensure good air permeability and adsorption efficiency of the adsorption tower. The screened dust has carbon as main component and may be recovered as fuel.
TABLE 1
In the material circulation process, a large amount of dust exists in the carbon-based catalyst, dust is raised at a material dropping point and a material discharging point of the conveyor, a centralized dust removal system needs to be arranged in the desulfurization and denitrification process by the carbon-based catalytic method, and micro negative pressure is formed in the conveyor to prevent the dust from escaping and polluting the environment. In the process that the carbon-based catalyst is loaded into a storage bin and the active coke powder collected in a centralized manner is discharged, dust exists and dust removal treatment is also needed.
If the heat released by the low-temperature oxidation of the carbon-based catalyst cannot be released in time, the temperature of the carbon-based catalyst can be increased, so that the oxidation is accelerated, more heat is released, the fine powder carbon-based catalyst can be spontaneously combusted at first, and then the particles of the carbon-based catalyst are ignited to cause violent combustion. Therefore, the storage of carbon-based catalyst particles or powder should meet the process requirements and also take measures to prevent spontaneous combustion at normal temperature.
Disclosure of Invention
An object of the utility model is to overcome prior art not enough, provide a simple structure, take up an area of less, resources are saved's dust centralized processing system and method to and the tiny granule dust of effective collection charcoal base catalyst production in SOx/NOx control device circulation process guarantees adsorption tower gas permeability and adsorption efficiency.
The utility model discloses above-mentioned purpose is realized through following technical scheme:
a dust centralized processing system for a carbon-based catalytic flue gas desulfurization and denitrification device comprises a booster fan, a desulfurization and denitrification tower, a carbon-based catalyst storage bin, a regeneration tower, a first conveyor, a vibrating screen and a second conveyor, wherein the desulfurization and denitrification tower is used for purifying raw flue gas fed by the booster fan;
the environment dust removal system comprises a dust removal pipeline, a first ventilation opening and a first manual valve which are arranged at the tail end of the dust removal pipeline, a first air extraction point which is positioned between a first conveyor and a regeneration tower, a second air extraction point which is positioned between a second conveyor and a desulfurization and denitrification tower, a first bag-type dust remover which is sequentially connected with the initial end of the dust removal pipeline, a centrifugal fan which is used for purifying dust-containing gas by the first bag-type dust remover and then discharging the purified dust-containing gas into the outside, and a first dust discharge valve which is arranged below the first bag-type dust remover and is used for discharging collected dust into a dust discharge system, wherein the initial end of the dust removal pipeline is provided with the second manual valve, and the first air extraction point and the second air extraction point are respectively connected with the dust removal pipeline through branch pipes;
the dust collecting system comprises a dust collecting pipeline, a second vent hole arranged at the tail end of the dust collecting pipeline, a screening bin positioned below the vibrating screen, a gravity dust collector, a second bag-type dust collector, a Roots blower and a second dust discharging valve and a third dust discharging valve, wherein the gravity dust collector is sequentially connected with the initial end of the dust collecting pipeline and used for removing larger carbon-based catalyst particles in dust-containing gas, the Roots blower is used for purifying the dust-containing gas by the second bag-type dust collector and then discharging the purified dust-containing gas into the outside, and the second dust discharging valve and the third dust discharging valve are respectively arranged below the gravity dust collector and the second bag-type dust collector; the powder collecting system adopts negative pressure transmission generated by the Roots blower, and compared with a positive pressure pneumatic transmission system of compressed air, the powder collecting system has the advantages of simple structure, less equipment and instruments and reduced investment;
the dust discharge system sequentially comprises a powder bin, a telescopic chute and a tank truck hermetically butted with the telescopic chute, the powder bin is connected with the telescopic chute through a pipeline, a fourth ash discharge valve is arranged on the pipeline, the powder bin is positioned below the first ash discharge valve, the second ash discharge valve and the third ash discharge valve, collected dust can directly fall into the powder bin, conveying equipment is omitted, the system is simplified, the structure is compact, occupied space can be saved, and investment can be reduced.
Furthermore, seven dust removing points a-g are arranged on the dust removing pipeline between the first manual valve and the second manual valve, speed measuring ports and manual valves are arranged on the dust removing branch pipes of the dust removing points, the configuration structure of the dust removing points is simple, the air quantity of each point can be effectively balanced, and the selection of the fan is more scientific and reasonable. The dust removal point a is connected to a first air draft point, a micro-negative pressure working condition that a first conveyor enters a chute of a regeneration tower is created, and smooth feeding of the carbon-based catalyst is achieved; the dust removing point b is connected to a blanking point of the second conveyor to create a micro-negative pressure working condition in the box body, and raised dust generated in blanking is controlled in the closed box body to prevent dust from escaping and polluting the environment; the dust removing point c is connected into a storage bin and enters a blanking point of the first conveyor to create a micro-negative pressure working condition in the box body, and raised dust generated during blanking is controlled in the closed box body to prevent dust from escaping and polluting the environment; the dust removing point d is connected with a discharging point for loading the carbon-based catalyst into a storage bin, a local micro-negative pressure working condition is created, and raised dust generated during discharging is controlled in a sealing cover, so that dust is prevented from escaping and polluting the environment; the dust removing point e is connected to a blanking point which enters the first conveyor from the denitration and desulfurization tower, a micro-negative pressure working condition in the box body is created, and raised dust generated during blanking is controlled in the closed box body, so that dust is prevented from escaping and polluting the environment; the dust removal point f is connected to a second air draft point, and a micro-negative pressure working condition that a second conveyor enters a chute of the desulfurization and denitrification tower is created, so that smooth feeding of the carbon-based catalyst is realized; the dust removal point g is connected to a pipeline between the fourth dust discharge valve and the telescopic chute, a local micro-negative pressure working condition is created, and raised dust generated during discharging is controlled in the telescopic chute, so that dust is prevented from escaping and polluting the environment.
Further, the flow velocity of each dust removing point is 18-22 m/s.
Preferably, the flow velocity at each dust removal point is 20 m/s.
Further, dust discharge points A-C are arranged on a dust collecting pipeline between the second ventilation opening and the gravity dust collector, wherein the discharge point A is connected with the screening bin, and carbon-based catalyst powder in the screening bin is conveyed to the powder bin by using the negative pressure of the system; the outer discharge point B is connected with a second conveyor, and the carbon-based catalyst particles and powder falling from the second conveyor are conveyed to a powder bin by using the negative pressure of the system; and the outer discharging point C is connected with the first conveyor, and the carbon-based catalyst particles and powder falling from the first conveyor are conveyed to the powder bin by using the negative pressure of the system.
Furthermore, among the dust collection system, be provided with a plurality of branches that are arranged in collecting the charcoal base catalyst granule that scatters in flue gas desulfurization denitrification facility external environment, the initial end of branch is gone into the dust and is collected the pipeline, and the initial end is equipped with the manual valve of third, and the end setting of branch is in flue gas desulfurization denitrification facility's outside. The branch is convenient for collecting the carbon-based catalyst scattered in the environment, and the labor intensity is reduced.
Furthermore, the lower part of the powder bin is in a cone shape, and the inner side wall of the cone is provided with a plurality of anti-blocking devices for introducing external gas to purge the side wall to prevent the powder bin from being blocked. Compressed air can be blown into the powder bin periodically or as required, so that the powder bin is loosened and agglomerated, and smooth blanking is realized.
Further, the compressed air flow rate is 0.6-1.2Nm3Min and pressure of 0.2-0.3 MPa.
Preferably, the first and second electrodes are formed of a metal,compressed air flow rate of 0.9Nm3/min。
Furthermore, the anti-blocking device is uniformly arranged in four rows from the middle point along the inclined height direction of the cone part, the distance is 1/8 with inclined height, and each row is uniformly distributed with 4 pieces along the circumferential direction.
Further, the lateral wall in powder storehouse is equipped with four and keeps off the material level, and every grade material level is equipped with material level switch and alarm device, is the first material level switch of HH, H second material level switch, L third material level switch, LL fourth material level switch respectively. When the material level reaches H, an alarm is given out to prompt that carbon-based catalyst powder needs to be transported outside; when the material level reaches HH, stopping feeding the materials into the bin, interlocking the first ash discharge valve, the second ash discharge valve and the third ash discharge valve to stop, and connecting the environmental dust removal system and the dust collection system in parallel to stop; when the material level reaches L, giving an alarm to prompt that the carbon-based catalyst powder is stopped being discharged; and when the material level reaches LL, the fourth ash discharge valve and the telescopic chute are interlocked to stop, and carbon-based catalyst dust cannot be discharged outside.
Further, the lower cone of the powder bin is provided with a thermometer. The device is used for detecting the temperature of the carbon-based catalyst powder, alarming when the temperature reaches 100 ℃, and introducing nitrogen protective gas from a vent hole in the middle of the anti-blocking device to prevent ignition.
Furthermore, the top of the powder bin is provided with a first ash port connected with a second ash discharge valve, a second ash port connected with a third ash discharge valve, a third ash port connected with the first ash discharge valve and a communicating pipe. The communicating pipe is communicated with the outside to ensure smooth feeding.
Further, the top in powder storehouse still is provided with first manhole door, and the lateral wall is equipped with second manhole door, can get into and carry out inspection and maintenance operation in the powder storehouse.
Furthermore, filter screens are respectively arranged at the inlets of the first ventilation opening and the second ventilation opening. The first ventilation opening and the second ventilation opening are communicated with the outside to balance the pressure in the pipe, and the filter screen can prevent impurities from entering the system to block the pipeline.
Before the environmental dust removal system operates, a first manual valve is opened to a preset opening degree, the opening degree is adjusted to a proper opening degree during operation, a second manual valve is in a normally open state and is closed when the whole system stops for a long time, and dust in a dust removal pipeline is discharged into a powder bin through a first bag-type dust remover; the dust collection system adopts negative pressure transmission generated by a Roots blower, and dust in the dust collection pipeline is discharged into the powder bin through the gravity dust collector and the second bag-type dust collector; the dust discharging system discharges dust collected by the powder bin through the fourth dust discharging valve, the telescopic chute extends from the original contraction state and is in butt joint with the tank truck, and closed discharging is achieved. The environment dust removal system and the dust collection system are relatively closed systems, and collected carbon-based catalyst particles or powder cannot be polluted, can be directly and effectively utilized, and does not need to remove impurities.
Has the advantages that:
the utility model provides a dust centralized processing system and method can effectively collect the tiny granule dust that charcoal base catalyst produced at SOx/NOx control device circulation process, guarantees adsorption tower gas permeability and adsorption efficiency, simple structure, take up an area of less, resources are saved.
Drawings
FIG. 1 is a structural diagram of a desulfurization and denitrification device adopting a carbon-based catalytic method;
FIG. 2 is a structural diagram of a dust centralized processing system of the present invention;
FIG. 3 is a view showing the structure of a powder hopper;
FIG. 4 is an arrangement diagram of the anti-blocking device and an enlarged view of the part I;
wherein 101 is a first ventilation opening, 102 is a first manual valve, 103 is a first air exhaust point, 104 is a second air exhaust point, 105 is a second manual valve, 106 is a centrifugal fan, 107 is a first bag-type dust collector, 108 is a first ash discharging valve, 201 is a screening bin, 202 is a second ventilation opening, 203 is a third manual valve, 204 is a roots fan, 205 is a second bag-type dust collector, 206 is a gravity dust collector, 207 is a second ash discharging valve, 208 is a third ash discharging valve, 301 is a powder bin, 302 is a fourth ash discharging valve, 303 is a telescopic chute, 304 is a tank truck, 401 is a first ash inlet, 402 is a second ash inlet, 403 is a first manhole door, 404 is a communicating pipe, 405 is a third ash inlet, 406 is a device, 407 is a device with anti-blocking function, 401 is a tank truckA material level switch, 408 is a second material level switch, 409 is a second manhole door, 410 is a third material level switch, 411 is a fourth material level switch, 412 is a thermometer, 5 is a booster fan, 6 is raw flue gas, 7 is a desulfurization and denitrification tower, 8 is a storage bin for a carbon-based catalyst, 9 is a regeneration tower, 10 is a first conveyor, 11 is a vibrating screen, 12 is a second conveyor, 13 is a chimney, 14 is NH315 is a carbon-based catalyst, and 16 is a powder.
Detailed Description
The following detailed description will specifically describe the essential contents of the present invention with reference to the accompanying drawings, but not limit the scope of the present invention.
Fig. 2 and 3 show a centralized dust processing system for a flue gas desulfurization and denitration device by a carbon-based catalytic method, wherein the flue gas desulfurization and denitration device by a carbon-based catalytic method comprises a booster fan 5, a desulfurization and denitration tower 7 for purifying raw flue gas 6 fed by the booster fan 5, a storage bin 8 for a carbon-based catalyst, a regeneration tower 9, a first conveyor 10 for feeding fresh adsorbent in the storage bin 8 and carbon-based catalyst discharged from the desulfurization and denitration tower 7 and saturated in adsorption into the regeneration tower 9, a vibrating screen 11 for screening adsorbent regenerated from the regeneration tower 9, and a second conveyor 12 (as shown in fig. 1) for feeding qualified catalyst screened by the vibrating screen 11 into the desulfurization and denitration tower, and the centralized dust processing system comprises an environmental dust removal system, a dust collection system and a dust discharge system.
The environment dust removing system comprises a dust removing pipeline, a first ventilation opening 101 and a first manual valve 102 which are arranged at the tail end of the dust removing pipeline, a first air draft point 103 which is arranged between a first conveyor 10 and a regeneration tower 9, a second air draft point 104 which is arranged between a second conveyor 12 and a desulfurization and denitrification tower 7, a first bag-type dust remover 107 which is sequentially connected with the initial end of the dust removing pipeline, a centrifugal fan 106 which is used for purifying dust-containing gas by the first bag-type dust remover 107 and then exhausting the purified dust into the outside, and a first dust discharging valve 108 which is arranged below the first bag-type dust remover 107 and used for discharging collected dust into a dust discharging system, wherein the second manual valve 105 is arranged at the initial end of the dust removing pipeline, and the first air draft point 103 and the second air draft point 104 are respectively connected with the dust removing pipeline through branch pipes. The first ventilation opening 101 is communicated with the outside to balance the pressure in the pipe, and a filter screen is arranged at the inlet to prevent impurities from entering the system to block the pipeline.
Seven dust removing points a-g are arranged on the dust removing pipeline between the first manual valve 102 and the second manual valve 105, and a speed measuring port and a manual valve are arranged on the dust removing branch pipe of each dust removing point (as shown in table 2 and figure 2). The dust removing point configuration structure is simple, the air quantity of each point can be effectively balanced, and the fan is more scientific and reasonable in selection. The dust removal point a is connected to a first air draft point 103, a micro negative pressure working condition that a first conveyor 10 enters a chute of a regeneration tower 9 is created, and smooth feeding of the carbon-based catalyst is achieved; the dust removing point b is connected to a blanking point of the second conveyor 12 to create a micro-negative pressure working condition in the box body, and raised dust generated in blanking is controlled in the closed box body to prevent dust from escaping and polluting the environment; the dust removing point c is connected into the storage bin 8 and enters a blanking point of the first conveyor 10, a micro-negative pressure working condition in the box body is created, and raised dust generated in blanking is controlled in the closed box body, so that dust is prevented from escaping and polluting the environment; the dust removing point d is connected with a discharging point of a carbon-based catalyst 15 which is loaded into the storage bin 8, a local micro-negative pressure working condition is created, and raised dust generated during discharging is controlled in the sealing cover, so that dust is prevented from escaping and polluting the environment; the dust removing point e is connected to a blanking point which enters the first conveyor 10 from the denitration and desulfurization tower 7, a micro-negative pressure working condition in the box body is created, and raised dust generated during blanking is controlled in the closed box body, so that the dust is prevented from escaping and polluting the environment; the dust removal point f is connected to a second air draft point 104, and a micro negative pressure working condition that the second conveyor 12 enters a chute of the desulfurization and denitrification tower 7 is created, so that smooth feeding of the carbon-based catalyst is realized; the dust removal point g is connected to a pipeline between the fourth dust discharge valve 302 and the telescopic chute 303, a local micro-negative pressure working condition is created, and raised dust generated during discharging is controlled in the telescopic chute 303, so that the dust is prevented from escaping and polluting the environment.
TABLE 2
Before the environmental dust removal system operates, the opening degree of the first manual valve 102 is preset to be 50%, and during operation, the first manual valve is adjusted according to the testing flow rate of each dust removal point and is finally fixed at a proper opening degree. When the system is operated and debugged, the wind speed is detected at the speed measuring port of each dedusting point, the opening of the manual valve of each dedusting point is adjusted until the preset value is reached and the opening is kept unchanged, and the flow speed of each dedusting point is 18-22 m/s. The second manual valve 105 is a main valve of the dust removal pipeline, is in a normally open state, and is closed when the whole system is shut down for a long time.
The dust collecting system comprises a dust collecting pipeline, a second ventilation opening 202 arranged at the tail end of the dust collecting pipeline, a screening bin 201 positioned below the vibrating screen 11, a gravity dust collector 206 which is sequentially connected with the initial end of the dust collecting pipeline and used for removing larger carbon-based catalyst particles in dust-containing gas, a second bag-type dust collector 205, a Roots blower 204 which is used for purifying the dust-containing gas through the second bag-type dust collector 205 and then discharging the purified gas into the outside, and a second dust discharging valve 207 and a third dust discharging valve 208 which are respectively arranged below the gravity dust collector 206 and the second bag-type dust collector 205, wherein the screening bin 201 is connected with the dust collecting pipeline through branch pipes. The powder collection system adopts the negative pressure transmission produced by the Roots blower 204, and compared with a positive pressure pneumatic transmission system of compressed air, the powder collection system has the advantages of simple structure, less equipment and instruments and reduced investment. The second ventilation port 202 is communicated with the outside to balance the pressure in the pipe, and a filter screen is arranged at the inlet to prevent impurities from entering the system to block the pipeline.
Dust discharge points A-C are arranged on a dust collecting pipeline between the second ventilation opening 202 and the gravity dust collector 206, wherein the discharge point A is connected with the screening bin 201, and carbon-based catalyst powder in the screening bin 201 is conveyed to the powder bin 301 by using system negative pressure; the external discharge point B is connected with the second conveyor 12, and the carbon-based catalyst particles and powder falling from the second conveyor 12 are conveyed to the powder bin 301 by using the negative pressure of the system; the discharging point C is connected to the first conveyor 10, and the carbon-based catalyst particles and powder dropped from the first conveyor 10 are conveyed to the powder bin 301 by using the negative pressure of the system.
In the dust collection system, a plurality of branches for collecting carbon-based catalyst particles scattered in the external environment of the flue gas desulfurization and denitration device are arranged, the initial ends of the branches are connected into a dust collection pipeline, the initial ends of the branches are provided with third manual valves 203 and are in a normally closed state and are opened when needed, and the tail ends of the branches are arranged outside the flue gas desulfurization and denitration device, which is indicated by 3 positions of D1, D2 and D3 in fig. 2. The branch is convenient for collecting the carbon-based catalyst scattered in the environment, and the labor intensity is reduced.
The dust discharge system comprises a powder bin 301, a telescopic chute 303 and a tank truck 304 hermetically butted with the telescopic chute 303, wherein the powder bin 301 is connected with the telescopic chute 303 through a pipeline, a fourth ash discharge valve 302 is arranged on the pipeline, the powder bin 301 is positioned below the first ash discharge valve 108, the second ash discharge valve 207 and the third ash discharge valve 208, collected dust can directly fall into the powder bin 301, conveying equipment is omitted, the system is simplified, the structure is compact, occupied space can be saved, and investment is reduced.
The lower part of the powder bin 301 is in a cone shape, the inner side wall of the cone is provided with a plurality of anti-blocking devices 406 for introducing external gas to purge the side wall to prevent the powder bin 301 from being blocked, as shown in fig. 4, four rows of 1/8 with the intervals of oblique height are uniformly arranged from the middle point along the oblique height direction of the cone part, and 4 rows are uniformly distributed along the circumferential direction. The middle of the anti-blocking device 406 is provided with a vent hole (as shown in an enlarged view of part I in fig. 4), so that compressed air can be blown into the powder bin 301 periodically or as required to loosen and agglomerate, and smooth blanking is realized. Compressed air flow rate of 0.6-1.2Nm3Min and pressure of 0.2-0.3 MPa.
Four material level retaining positions are arranged on the side wall of the powder bin 301, and each material level retaining position is provided with a material level switch and an alarm device which are respectively an HH first material level switch 407, an H second material level switch 408, an L third material level switch 410 and an LL fourth material level switch 411. When the material level reaches the H second material level switch 408, an alarm is given out to prompt that carbon-based catalyst powder needs to be transported outside; when the material level reaches an HH first material level switch 407, feeding into the powder bin 301 is stopped, the first ash discharge valve 108, the second ash discharge valve 207 and the third ash discharge valve 208 are interlocked, and the dust removal system and the dust collection system are connected in parallel and shut down; when the material level reaches the L third material level switch 410, giving an alarm to prompt that the carbon-based catalyst powder is stopped being discharged; when the material level reaches LL fourth material level switch 411, the interlocking fourth ash discharge valve 302 and the telescopic chute 303 stop and carbon-based catalyst dust cannot be discharged outside.
The lower cone of the powder bin 301 is provided with a thermometer 412 for detecting the temperature of the carbon-based catalyst powder, alarming when the temperature reaches 100 ℃, and introducing nitrogen protection gas from a vent hole in the middle of the anti-blocking device 406 to prevent ignition. The top of the powder bin 301 is provided with a first ash port 401 connected with the second ash discharge valve 207, a second ash port 402 connected with the third ash discharge valve 208, a third ash port 405 connected with the first ash discharge valve 108, and a communicating pipe 404. The connection pipe 404 is connected to the outside to ensure smooth feeding. The top of the powder bin 301 is also provided with a first manhole door 403, and the side wall of the powder bin is provided with a second manhole door 409, so that the powder bin 301 can be accessed for inspection and maintenance.
By adopting the dust centralized treatment method of any system, before the environmental dust removal system operates, the first manual valve 102 is opened to a preset opening degree, and is adjusted to a proper opening degree during operation, the second manual valve 105 is in a normally open state and is closed when the whole system is stopped for a long time, and dust in the dust removal pipeline is discharged into the powder bin 301 through the first bag-type dust remover 107; the dust collection system adopts negative pressure transmission generated by a Roots blower 204 to discharge dust in the dust collection pipeline into a powder bin 301 through a gravity dust collector 206 and a second bag-type dust collector 205; the dust discharging system discharges the dust collected by the powder bin 301 through the fourth dust discharging valve 302, and the telescopic chute 303 extends from an original contraction state and is in butt joint with the tank truck 304 to realize closed discharging. The environment dust removal system and the dust collection system are relatively closed systems, collected carbon-based catalyst particles or dust cannot be polluted, and the collected carbon-based catalyst particles or dust can be directly and effectively utilized without removing impurities.
The utility model provides a dust centralized processing system and method can effectively collect the tiny granule dust that charcoal base catalyst produced at SOx/NOx control device circulation process, guarantees adsorption tower gas permeability and adsorption efficiency, simple structure, take up an area of less, resources are saved.
Claims (8)
1. The utility model provides a dust centralized processing system for charcoal base catalysis method flue gas desulfurization denitrification facility, wherein charcoal base catalysis method flue gas desulfurization denitrification facility includes booster fan, a SOx/NOx control tower for carrying out the purification with the former flue gas that booster fan sent into, the storehouse is stored to charcoal base catalyst, the regeneration tower, a first conveyer that is used for sending into the regeneration tower with the fresh adsorbent of storing the storehouse and the charcoal base catalyst that adsorbs saturation from SOx/NOx control tower exhaust, a shale shaker that is used for carrying out the screening with the adsorbent that comes out from regeneration tower, a second conveyer that is used for sending into SOx/NOx control tower through the qualified catalyst of shale shaker screening, its characterized in that: the dust centralized processing system comprises an environmental dust removal system, a dust collection system and a dust discharge system;
the environment dust removal system comprises a dust removal pipeline, a first ventilation opening and a first manual valve which are arranged at the tail end of the dust removal pipeline, a first air extraction point which is positioned between a first conveyor and a regeneration tower, a second air extraction point which is positioned between a second conveyor and a desulfurization and denitrification tower, a first bag-type dust remover which is sequentially connected with the initial end of the dust removal pipeline, a centrifugal fan which is used for purifying dust-containing gas by the first bag-type dust remover and then discharging the purified dust-containing gas into the outside, and a first dust discharge valve which is arranged below the first bag-type dust remover and is used for discharging collected dust into a dust discharge system, wherein the initial end of the dust removal pipeline is provided with the second manual valve, and the first air extraction point and the second air extraction point are respectively connected with the dust removal pipeline through branch pipes;
the dust collecting system comprises a dust collecting pipeline, a second ventilation opening arranged at the tail end of the dust collecting pipeline, a screening bin positioned below the vibrating screen, a gravity dust collector, a second bag-type dust collector, a Roots blower and a second dust discharging valve, wherein the gravity dust collector is sequentially connected with the initial end of the dust collecting pipeline and used for removing large-particle carbon-based catalysts in dust-containing gas, the Roots blower is used for discharging the dust-containing gas into the outside after the dust-containing gas is purified by the second bag-type dust collector, the second dust discharging valve and the third dust discharging valve are respectively arranged below the gravity dust collector and the second bag-type dust collector, and the screening bin is connected with the dust collecting pipeline through a branch;
the dust discharge system sequentially comprises a powder bin, a telescopic chute and a tank truck hermetically butted with the telescopic chute, wherein the powder bin is connected with the telescopic chute through a pipeline, a fourth ash discharge valve is arranged on the pipeline, and the powder bin is positioned below the first ash discharge valve, the second ash discharge valve and the third ash discharge valve.
2. The system of claim 1, wherein: seven dust removal points a-g are arranged on a dust removal pipeline between the first manual valve and the second manual valve, a speed measurement port and a manual valve are arranged on a dust removal branch pipe of each dust removal point, the dust removal point a is connected to the first air extraction point, the dust removal point b is connected to a blanking point of the second conveyor, the dust removal point c is connected to a blanking point of the first conveyor, the dust removal point d is connected to a discharge point of the carbon-based catalyst loading storage bin, the dust removal point e is connected to a blanking point of the first conveyor by the denitration desulfurization tower, the dust removal point f is connected to the second air extraction point, and the dust removal point g is connected to a pipeline between the fourth dust discharge valve and the telescopic chute.
3. The system of claim 1, wherein: and dust discharge points A-C are arranged on the dust collecting pipeline between the second ventilation opening and the gravity dust collector, wherein the dust discharge point A is connected with the screening bin, the dust discharge point B is connected with the second conveyor, and the dust discharge point C is connected with the first conveyor.
4. The system of claim 1, wherein: in the dust collecting system, a plurality of branches used for collecting carbon-based catalyst particles scattered in the external environment of the flue gas desulfurization and denitration device are arranged, the initial ends of the branches are connected with a dust collecting pipeline, the initial ends of the branches are provided with third manual valves, and the tail ends of the branches are arranged outside the flue gas desulfurization and denitration device.
5. The system of claim 1, wherein: the lower part of the powder bin is in a cone shape, and the inner side wall of the cone is provided with a plurality of anti-blocking devices for introducing external gas to purge the side wall to prevent the powder bin from being blocked.
6. The system of claim 5, wherein: the anti-blocking devices are uniformly arranged at different heights of the inner side wall of the cone in the circumferential direction.
7. The system of claim 1, wherein: the lateral wall of the powder bin is provided with four material blocking positions, and each material blocking position is provided with a material level switch and an alarm device.
8. The system of claim 1, wherein: and filter screens are respectively arranged at the inlets of the first ventilation opening and the second ventilation opening.
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| CN109939564A (en) * | 2019-04-18 | 2019-06-28 | 国电环境保护研究院有限公司 | A kind of dust centralized processing system and method for charcoal base catalysis method flue gas desulfurization and denitrification device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109939564A (en) * | 2019-04-18 | 2019-06-28 | 国电环境保护研究院有限公司 | A kind of dust centralized processing system and method for charcoal base catalysis method flue gas desulfurization and denitrification device |
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