CN108786443B - Low-temperature cyclic regeneration denitration catalytic device - Google Patents
Low-temperature cyclic regeneration denitration catalytic device Download PDFInfo
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- CN108786443B CN108786443B CN201810603921.5A CN201810603921A CN108786443B CN 108786443 B CN108786443 B CN 108786443B CN 201810603921 A CN201810603921 A CN 201810603921A CN 108786443 B CN108786443 B CN 108786443B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8628—Processes characterised by a specific catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
- B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Abstract
The invention belongs to the technical field of waste flue gas denitration of industrial boilers, and particularly relates to a low-temperature cyclic regeneration denitration catalytic device which comprises a reaction cavity, a collecting tank, a guide pipe, a circulating pump, a catalytic reaction device, a rotating device, a grinding device and a conveying device; the reaction cavity is provided with a first air inlet, an exhaust port, a first ash outlet and a second air inlet; the air inlet is positioned on the outer wall of the left side of the reaction cavity; the exhaust port is positioned on the outer wall of the right side of the reaction cavity; the first ash falling port is positioned at the bottom of the reaction chamber; the air inlet two is positioned above the air inlet one; the collecting tank is positioned on the left side of the reaction cavity; the guide pipe is positioned on the left side of the collecting tank and is respectively communicated with the reaction cavity and the collecting tank; the circulating pump is positioned in the conduit; the catalytic reaction device is positioned in the reaction cavity; the rotating device is positioned in the reaction cavity and is positioned below the catalytic reaction device; the grinding device is positioned in the reaction cavity and below the rotating device; the conveying device is positioned in the reaction cavity and below the adjusting wheel.
Description
Technical Field
The invention belongs to the technical field of denitration of waste flue gas of industrial boilers, and particularly relates to a low-temperature cyclic regeneration denitration catalytic device.
Background
Along with the development of industry, the coal consumption in China is increasing day by day, and the coal yield in China is more than 35 hundred million tons and accounts for half of the whole world from 2011. While coal resources are consumed, a large amount of SO2 and NOx which are harmful to human bodies are generated, and environmental pollution caused by SO2 and NOx, such as greenhouse effect, acid rain, ozone layer damage and the like, is a problem which is of consistent social concern at present. The research of various technologies for treating air pollution has become the most urgent mission of environmental protection workers in various countries. The treatment of boiler flue gas is from the requirement of 1998 for dust removal, and the process from desulfurization and denitration to PM2.5 is increasingly strict, especially the flue gas denitration is just started at present. At present, the mainstream process for desulfurization and denitration of waste flue gas of industrial boilers (kilns) in various countries is a method for removing nitric oxide in flue gas by using a Selective Catalytic Reduction (SCR) technology. The selective reduction method is to reduce NOx into N2 and water which have no pollution influence on the atmosphere by using the reduction function of ammonia (NH3) on NOx under the condition of 320-400 ℃, and the selective means that ammonia only selects NOx to carry out reduction reaction. The process is firstly developed successfully in Japan in the end of the 70 th 20 th century, and after the 80 th and 90 th years, Europe and America are successively put into industrial application and become the mainstream process for flue gas denitration of large industrial boilers worldwide.
The SCR system comprises an ammonia supply system, an ammonia/air injection system, a catalytic reaction system, a control system and the like, wherein the catalytic reaction system is the core of the SCR process, a nozzle with NH3 and a blowing device of fly ash are arranged, flue gas enters an SCR reactor loaded with a catalyst along a flue, and NOx is reduced into N2 on the surface of the catalyst by NH 3. Although the SCR technology is the mainstream technology of current denitration, the technology needs to modify a boiler, needs a high-temperature environment, and needs to treat hazardous waste after poisoning and scrapping of a high-temperature denitration catalyst, and some solutions are provided in related technical fields in China for the purpose of identifying the above problems, for example, a low-temperature cyclic regeneration denitration catalytic device disclosed in a chinese patent with application number 201510017591.8 comprises a catalytic tower, wherein a smoke inlet is formed in one side of a tower body of the catalytic tower, a smoke outlet is formed in the other side of the tower body of the catalytic tower, and the low-temperature cyclic regeneration denitration catalytic device further comprises a catalyst regeneration device and a conveying device; a catalyst reaction device, a poisoned catalyst discharging device and a regenerated catalyst feeding device are arranged in the catalytic tower; the catalyst regeneration device comprises a poisoned catalyst feeding device, a regeneration treatment device and a regenerated catalyst discharging device, and the regenerated catalyst feeding device is communicated with the regenerated catalyst discharging device through the conveying device. The device has solved above-mentioned problem to a certain extent, but the dust that the device produced adsorbs easily on the separation sieve, and the device is not good to the grinding effect of poisoning catalyst, can not effectual detach the reaction layer on poisoning catalyst surface, and waste gas probably produces the deposit when getting into the device simultaneously, can not get into the reaction in the catalytic tower completely.
In view of the above, the low-temperature cyclic regeneration denitration catalyst device provided by the invention can effectively solve the problems, and meanwhile, the production efficiency can be greatly improved and the production rhythm can be accelerated.
Disclosure of Invention
In order to make up for the defects of the prior art, the low-temperature cyclic regeneration denitration catalytic device provided by the invention has the advantages that the waste gas entering the reaction cavity is conveyed to the catalytic reaction device through the rotating device, the flowing speed of the waste gas is increased, and the catalytic denitration of the waste gas is accelerated. The invention can effectively remove the reaction layer on the surface of the poisoned catalyst through the regulating wheel and the grinding wheel of the grinding device; the invention can discharge the dust in the reaction chamber out of the reaction device through the matching of the conveyor belt, the belt wheel and the transmission block in the conveyor device, thereby avoiding the residue.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a low-temperature cyclic regeneration denitration catalytic device which comprises a reaction cavity, a collecting tank, a guide pipe, a circulating pump, a catalytic reaction device, a rotating device, a grinding device and a conveying device, wherein the reaction cavity is provided with a reaction inlet and a reaction outlet; the reaction cavity is provided with a first air inlet, an exhaust port, a first ash outlet and a second air inlet; the first air inlet is positioned on the left side of the reaction cavity and used for introducing waste gas to be treated into the reaction cavity; the exhaust port is positioned on the right side of the reaction cavity and used for exhausting gas reaching the treatment standard; the first ash outlet is positioned at the bottom of the reaction cavity and used for discharging dust in the reaction cavity out of the reaction cavity; the second air inlet is positioned above the first air inlet and is used for introducing ammonia gas into the reaction cavity; the collecting tank is positioned on the left side of the reaction cavity and communicated with the reaction cavity, and the collecting tank is used for collecting regenerated catalyst; the guide pipe is positioned on the left side of the collecting tank, the guide pipe is respectively communicated with the reaction cavity and the collecting tank, and the guide pipe is used for conveying the regenerated catalyst in the collecting tank to the reaction cavity; the circulating pump is positioned in the conduit; the catalytic reaction device is positioned in the reaction cavity and above the second air inlet and is of a net structure, and the catalytic reaction device is used for providing a reaction environment for reactants; the rotating device is positioned on the right side in the reaction cavity and positioned below the catalytic reaction device, and the rotating device is used for conveying the waste gas to be treated to the catalytic reaction device; the grinding device is positioned in the reaction cavity and below the rotating device, and the grinding device is used for removing a reaction layer on the surface of the reacted catalyst to obtain a regenerated catalyst; the conveying device is located in the reaction cavity and below the regulating wheel, the conveying device horizontally penetrates through the reaction cavity, the left side of the conveying device is in contact with the collecting tank, and the conveying device is used for conveying the regenerated catalyst to the collecting tank.
Preferably, the rotating device comprises a rotary disc, a support rod, a shifting plate, a first motor, a positioning disc, a balancing weight, a filter screen and a blocking plate; the rotary table is a cylinder, a circular cavity is arranged in the rotary table, a circular groove is formed in the outer circumferential surface of the rotary table, and a plurality of holes communicated with the circular cavity are formed in the groove; the positioning disc is an irregular cavity with the left side being semicircular and the right side being semi-elliptical, a slide way is circumferentially arranged on the outer wall of the positioning disc, a balancing weight is arranged in the bottom of the positioning disc, and the weight of the balancing weight is greater than that of the positioning disc; the number of the shifting plates is the same as that of the holes in the circular cavity, and the shifting plates are circumferentially hinged in the grooves; the filter screen is arranged on one side of the shifting plate, a through hole is formed in the shifting plate, and the filter screen is used for filtering particle impurities in the waste gas; the barrier plate is arranged on the filter screen and used for keeping the particle impurities on the filter screen; the number of the supporting rods corresponds to that of the shifting plates, one end of each supporting rod penetrates through a hole in the circular cavity to be connected with the filter screen, the other end of each supporting rod is installed on a slideway on the outer wall of the positioning plate, the supporting rods can circumferentially slide around the slideways and are used for driving the filter screen to move, and vibration of the filter screen is achieved; the first motor is fixed on the reaction cavity and used for driving the rotary table to rotate. When the device works, the motor drives the rotary disc to rotate, the positioning disc is kept still in the circular cavity due to the existence of the balancing weight, the shifting plate and the supporting rod rotate synchronously along with the rotary disc, the filter screen pushes waste gas to move upwards in the rotating process, and the waste gas is discharged from the through hole of the shifting plate after passing through the filter screen, so that particle impurities in the waste gas are left on the filter screen; in the process, one end of the supporting rod, which is positioned on the positioning disc while rotating, slides along the slide way on the positioning disc, and the length of the supporting rod is unchanged, the positioning disc is irregular in shape, and when the supporting rod enters a right semi-elliptical area, the filtering net shakes, particle impurities between the filtering net and the blocking plate are shaken off and fall into the first ash outlet under the action of gravity, so that the collection of the particle impurities is realized, and meanwhile, the rotating disc rotates to guide the waste gas to be treated upwards to enter the catalytic reaction device.
Preferably, the collecting tank is also provided with a filter screen and a second ash outlet; the filter screen is positioned in the collection tank, the filter screen is positioned below the guide pipe, through holes are formed in the filter screen, and the through holes in the filter screen can only pass through dust but cannot pass through the regenerated catalyst; the second ash outlet is located at the bottom of the collecting tank and used for discharging dust in the collecting tank. During operation, dust entering the collecting tank is filtered through the filter screen, and the filtered dust is discharged through the second dust outlet.
Preferably, the grinding device comprises a grinding wheel, an adjusting wheel, a belt and a motor II; the number of the grinding wheels is a plurality, the grinding wheels are positioned in the reaction cavity and are used for grinding the poisoned catalyst; the device comprises a reaction cavity, a plurality of regulating wheels, a plurality of grinding wheels, a plurality of reaction rollers and a plurality of reaction rollers, wherein the regulating wheels and the grinding wheels are horizontally distributed in a staggered manner, the regulating wheels are fixed in the reaction cavity, and the regulating wheels are used for regulating the gap between the grinding wheels and the regulating wheels; the number of the belts is a plurality, the belts are positioned outside the reaction cavity and are used for connecting the grinding wheel; the second motor is fixed on the reaction cavity, an output shaft of the second motor is connected with the grinding wheel, and the second motor is used for driving the grinding wheel to rotate. When the device works, the motor II drives the grinding wheel to rotate together with the belt, the grinding wheel grinds the poisoned catalyst falling between the adjusting wheel and the grinding wheel to remove a reaction layer on the surface of the poisoned catalyst, the adjusting wheel adjusts the distance between the grinding wheel and the adjusting wheel, and the regenerated catalyst obtained after grinding falls onto the conveying device through a gap between the adjusting wheel and the grinding wheel.
Preferably, the conveying device comprises a conveying belt, a belt wheel and a motor III; the conveying belt is positioned in the reaction cavity and used for conveying regenerated catalysts, through holes are further formed in the conveying belt, the number of the through holes is multiple, the upper end of the cross section of each through hole is rectangular, the lower end of the cross section of each through hole is trapezoidal, and the through holes are used for discharging dust; the reaction cavity is also hinged with a square plate, the square plate is positioned above the conveyor belt, the lower end of the square plate is contacted with the conveyor belt, the square plate is used for separating the reaction cavity from the collecting tank, and the square plate is convenient for the regenerated catalyst to enter the collecting tank; the number of the belt pulleys is two, the belt pulleys are positioned in the reaction cavity, rectangular grooves are further formed in the belt pulleys, the number of the rectangular grooves is multiple, and the rectangular grooves are circumferentially distributed on the belt pulleys; the rectangular groove is also provided with a transmission block, the transmission block is connected with the rectangular groove through a spring, the number and distribution of the transmission block are the same as those of the rectangular groove, and the transmission block is used for discharging residual dust in the through hole; and the third motor is fixed on the reaction cavity and is used for driving the belt wheel to rotate. When the device works, the motor III rotates, the regenerated catalyst falling on the conveying device enters the collecting tank through the square plate between the reaction cavity and the collecting tank under the action of the belt, and dust falling on the conveying device falls into the bottom of the reaction cavity through the through hole in the belt and is discharged from the first dust outlet; when the belt wheel rotates, the transmission block enters the through hole, and the residual dust in the through hole is discharged out of the through hole under the action of the transmission block.
The invention has the following beneficial effects:
1. according to the invention, the rotating device is arranged, so that particle impurities in the waste gas entering the reaction cavity are filtered and collected, meanwhile, the waste gas is accelerated to enter the catalytic reaction device, the waste gas is filtered, the waste gas is prevented from being deposited, the reaction speed is accelerated, the reaction is more thorough, and the production efficiency is improved.
2. According to the invention, the grinding device is arranged, and the adjusting wheel and the grinding wheel are arranged, so that the adjusting wheel can adjust the distance between the grinding wheel and the adjusting wheel, and a reaction layer on the surface of the poisoned catalyst can be effectively removed.
3. According to the invention, the conveying device is arranged, and the conveying belt, the belt pulley and the transmission block of the conveying device are matched with each other, so that the regenerated catalyst can be conveyed into the collection tank, meanwhile, dust in the reaction chamber and the collection tank is conveyed to the first ash outlet and the second ash outlet, and is discharged through the first ash outlet and the second ash outlet.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a front view of the present invention;
FIG. 2 is a schematic view of the structure of the rotating apparatus of FIG. 1;
FIG. 3 is a schematic view of the arrangement of the strut of the present invention installed in a slider;
FIG. 4 is a schematic view of the structure of the transfer device of the present invention;
FIG. 5 is a schematic view of the grinding wheel and belt of the present invention;
in the figure: reaction chamber 1, holding vessel 2, pipe 3, circulating pump 4, catalytic reaction unit 5, rotary device 6, grinder 7, conveyer 8, air inlet 11, gas vent 12, first ash hole 13, square plate 14, air inlet two 15, filter screen 21, second ash hole 22, carousel 61, branch 62, dial board 63, positioning disk 64, balancing weight 65, slide 66, filter screen 67, baffle plate 68, emery wheel 71, regulating wheel 72, belt 73, conveyer belt 81, band pulley 82, drive block 83.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1 to 5, the low-temperature cyclic regeneration denitration catalyst device of the present invention includes a reaction chamber 1, a collection tank 2, a conduit 3, a circulation pump 4, a catalytic reaction device 5, a rotating device 6, a grinding device 7, and a conveying device 8; the reaction chamber 1 is provided with a first air inlet 11, an exhaust port 12, a first ash outlet 13 and a second air inlet 15; the first air inlet 11 is positioned on the outer wall of the left side of the reaction cavity 1, and the first air inlet 11 is used for introducing waste gas to be treated; the exhaust port 12 is positioned on the outer wall of the right side of the reaction cavity 1, and the exhaust port 12 is used for exhausting gas which reaches the standard after treatment; the first ash outlet 13 is positioned at the bottom of the reaction chamber 1, and the first ash outlet 13 is used for discharging dust in the reaction chamber 1 out of the reaction chamber 1; the second air inlet 15 is positioned above the first air inlet 11, and the second air inlet 15 is used for introducing ammonia gas into the reaction cavity; the collecting tank 2 is positioned on the left side of the reaction cavity 1, the collecting tank 2 is communicated with the reaction cavity 1, and the collecting tank 2 is used for collecting regenerated catalysts; the guide pipe 3 is positioned on the left side of the collecting tank 2, the guide pipe 3 is respectively communicated with the reaction cavity 1 and the collecting tank 2, and the guide pipe 3 is used for conveying the regenerated catalyst in the collecting tank 2 into the reaction cavity 1; the circulation pump 4 is located in the conduit 3; the catalytic reaction device 5 is positioned in the reaction cavity 1, the catalytic reaction device 5 is positioned above the second air inlet 15, the catalytic reaction device 5 is of a net structure, and the catalytic reaction device 5 is used for providing a reaction environment for reactants; the rotating device 6 is positioned in the reaction cavity 1, the rotating device 6 is positioned below the catalytic reaction device 5, and the rotating device 6 is used for conveying the waste gas to be treated to the catalytic reaction device 5; the grinding device 7 is positioned in the reaction chamber 1, the grinding device 7 is positioned below the rotating device 6, and the grinding device 7 is used for removing reactants on the surface of the reacted catalyst to obtain a regenerated catalyst; the conveying device 8 is located in the reaction chamber 1, the conveying device 8 is located below the adjusting wheel 72, the conveying device 8 horizontally penetrates through the reaction chamber 1, the left side of the conveying device 8 is in contact with the collecting tank 2, and the conveying device 8 is used for conveying the regenerated catalyst to the collecting tank 2.
As an embodiment of the present invention, the rotating device 6 includes a rotating disc 61, a supporting rod 62, a shifting plate 63, a first motor, a positioning disc 64, a balancing weight 65, a filter screen 67 and a blocking plate 68; the turntable 61 is a cylinder, a circular cavity is arranged inside the turntable 61, a circular groove is formed in the outer circumferential surface of the turntable 61, and a plurality of holes communicated with the circular cavity are formed in the groove; a positioning rod and a positioning disc 64 are further arranged in the circular cavity, the positioning disc 64 is installed in the circular cavity through the positioning rod, the positioning disc 64 is an irregular cavity with the left side being semicircular and the right side being semi-elliptical, a slide way 66 is circumferentially arranged on the outer wall of the positioning disc 64, a balancing weight 65 is arranged in the bottom of the positioning disc 64, and the weight of the balancing weight 65 is larger than that of the positioning disc 64; the number of the shifting plates 63 is the same as that of the holes in the circular cavity, and the shifting plates 63 are circumferentially hinged in the grooves; the filter screen 67 is arranged on one side of the shifting plate 63, a through hole is formed in the shifting plate 63, and the filter screen 67 is used for filtering particle impurities in the waste gas; the blocking plate 68 is installed on the filter screen 67, and the blocking plate 68 is used for keeping the particle impurities on the filter screen 67; the number of the supporting rods 62 corresponds to that of the shifting plates 63, one end of each supporting rod 62 penetrates through a hole in the circular cavity to be connected with the filter screen 67, the other end of each supporting rod 62 is installed on a slide way 66 on the outer wall of the positioning plate 64, the supporting rods 62 can circumferentially slide around the slide ways 66, and the supporting rods 62 are used for driving the filter screen 67 to move so as to realize vibration of the filter screen 67; the first motor is fixed on the reaction chamber 1 and used for driving the rotating disc 61 to rotate. When the device works, the motor drives the rotary table 61 to rotate, the positioning disc 64 is kept stationary in the circular cavity due to the existence of the balancing weight 65, the shifting plate 63, the filter screen 67 and the supporting rod 62 synchronously rotate along with the rotary table 61, the filter screen 67 pushes waste gas to move upwards in the rotating process, and the waste gas is discharged from the through hole of the shifting plate 63 after passing through the filter screen 67, so that particle impurities in the waste gas are left on the filter screen 67; in the process, one end of the supporting rod 62, which is positioned on the positioning disc 64 while rotating, slides along the slide way 66 on the positioning disc 64, and as the length of the supporting rod 62 is unchanged and the shape of the positioning disc 64 is irregular, when the supporting rod 62 enters the right semi-elliptical area, the filtering net 67 is shaken, particulate impurities between the filtering net 67 and the blocking plate 68 are shaken off and fall into the first ash outlet 13 under the action of gravity, so that the collection of the particulate impurities is realized, and meanwhile, the rotation of the rotating disc 61 guides the exhaust gas to be treated upwards to enter the catalytic reaction device 5.
As an embodiment of the present invention, the collecting tank 2 is further provided with a filter screen 21 and a second ash outlet 22; the filter screen 21 is positioned in the collecting tank 2, the filter screen 21 is positioned below the guide pipe 3, through holes are formed in the filter screen 21, and the through holes in the filter screen 21 can only pass through dust but cannot pass through regenerated catalyst; the second ash outlet 22 is located at the bottom of the collecting tank 2, and the second ash outlet 22 is used for discharging the dust in the collecting tank 2. In operation, dust entering the collecting tank 2 is filtered by the filter screen 21, and the filtered dust is discharged through the second dust outlet 22.
As an embodiment of the present invention, the grinding device 7 includes a grinding wheel 71, an adjusting wheel 72, a belt 73 and a second motor; the grinding wheels 71 are a plurality of in number, the grinding wheels 71 are positioned in the reaction cavity 1, and the grinding wheels 71 are used for grinding poisoned catalysts; the number of the adjusting wheels 72 is a plurality, the adjusting wheels 72 and the grinding wheels 71 are horizontally distributed in a staggered manner, the adjusting wheels 72 are fixed in the reaction chamber 1, and the adjusting wheels 72 are used for adjusting gaps between the grinding wheels 71 and the adjusting wheels 72; the number of the belts 73 is a plurality, the belts 73 are positioned outside the reaction chamber 1, and the belts 73 are used for connecting the grinding wheel 71; the second motor is fixed on the reaction chamber 1, an output shaft of the second motor is connected with the grinding wheel 71, and the second motor is used for driving the grinding wheel 71 to rotate. When the device works, the motor drives the grinding wheel 71 and the belt 73 to rotate together, the grinding wheel 71 grinds poisoned catalyst falling between the adjusting wheel 72 and the grinding wheel 71 to remove a reaction layer on the surface of the poisoned catalyst, the adjusting wheel 72 adjusts the distance between the grinding wheel 71 and the adjusting wheel 72, and regenerated catalyst obtained after grinding falls onto the conveying device 8 through a gap between the adjusting wheel 72 and the grinding wheel 71.
As an embodiment of the present invention, the conveying device 8 includes a conveying belt 81, a pulley 82, and a motor three; the conveyor belt 81 is positioned in the reaction chamber 1, the conveyor belt 81 is used for conveying regenerated catalysts, a plurality of through holes are formed in the conveyor belt 81, the upper end of the cross section of each through hole is rectangular, the lower end of the cross section of each through hole is trapezoidal, and the through holes are used for discharging dust; the reaction chamber 1 is also hinged with a square plate 14, the square plate 14 is positioned above the conveyor belt 81, the lower end of the square plate 14 is in contact with the conveyor belt 81, the square plate 14 is used for separating the reaction chamber 1 from the collecting tank 2, and meanwhile, the square plate 14 is convenient for regenerated catalyst to enter the collecting tank 2; the number of the belt wheels 82 is two, the belt wheels 82 are positioned in the reaction chamber 1, rectangular grooves are further formed in the belt wheels 82, the number of the rectangular grooves is multiple, and the rectangular grooves are circumferentially distributed in the belt wheels 82; the rectangular groove is also provided with a transmission block 83, the transmission block 83 is connected with the rectangular groove through a spring, the number and distribution of the transmission blocks 83 are the same as those of the rectangular groove, and the transmission blocks 83 are used for discharging residual dust in the through holes; the third motor is fixed on the reaction chamber 1 and is used for driving the belt wheel 82 to rotate. When the device works, the motor III rotates, the regenerated catalyst falling on the conveying device 8 enters the collecting tank 2 through the square plate 14 between the reaction chamber 1 and the collecting tank 2 under the action of the belt 73, and dust falling on the conveying device 8 falls into the bottom of the reaction chamber 1 through the through holes in the belt 73 and is discharged from the first dust outlet 13; when the belt pulley 82 rotates, the transmission block 83 enters the through hole, and dust remaining in the through hole is discharged out of the through hole under the action of the transmission block 83.
The specific working process is as follows:
when the device works, waste gas to be treated is introduced into the reaction cavity 1 from the first air inlet 11, ammonia gas is introduced into the reaction cavity 1 from the second air inlet, the motor drives the rotary table 61 to rotate, the positioning disc 64 is kept immobile in the circular cavity due to the existence of the balancing weight 65, the shifting plate 63, the filter screen 67 and the supporting rod 62 synchronously rotate along with the rotary table 61, the filter screen 67 pushes the waste gas to move upwards in the rotating process, and the waste gas is discharged from the through holes of the shifting plate 63 after passing through the filter screen 67, so that particle impurities in the waste gas are left on the filter screen 67; in the process, one end of the supporting rod 62, which is positioned on the positioning disc 64, slides along the slide way 66 on the positioning disc 64 while rotating, because the length of the supporting rod 62 is unchanged, and the shape of the positioning disc 64 is irregular, when the supporting rod 62 enters a right semi-elliptical area, the filter screen 67 shakes, particulate impurities between the filter screen 67 and the blocking plate 68 are shaken off and fall into the first ash outlet 13 under the action of gravity, so that the collection of the particulate impurities is realized, and meanwhile, the rotation of the rotary disc 61 guides the exhaust gas to be treated upwards to enter the catalytic reaction device 5; poisoned catalyst generated in the reaction process falls between the regulating wheel 72 and the grinding wheel 71, and is ground by the grinding wheel 71 to generate regenerated catalyst, the regenerated catalyst enters the collecting tank 2 through the conveying belt 81, part of dust generated in the reaction process falls into the bottom of the reaction chamber 1 through a through hole in the belt 73 and is discharged out of the reaction chamber 1 through the first dust outlet 13, the other part of dust enters the collecting tank 2 and is discharged out of the collecting tank 2 through the second dust outlet 22 at the bottom of the collecting tank 2; the dust remained in the through hole of the belt 73 is discharged out of the through hole into the reaction chamber 1 or the collection tank 2 under the action of the transmission block 83; the regenerated catalyst entering the collecting tank 2 enters the reaction chamber 1 again through the conduit 3 to react with the waste gas under the action of the circulating pump 4, and after the reaction is finished, the gas which is treated to reach the discharge standard is discharged through the exhaust port 12.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. The utility model provides a low temperature circulation regeneration denitration catalytic unit which characterized in that: comprises a reaction cavity (1), a collecting tank (2), a conduit (3), a circulating pump (4), a catalytic reaction device (5), a rotating device (6), a grinding device (7) and a conveying device (8); the reaction chamber (1) is provided with a first air inlet (11), an exhaust port (12), a first ash outlet (13) and a second air inlet (15); the first air inlet (11) is positioned on the left side of the reaction cavity (1), and the first air inlet (11) is used for introducing waste gas to be treated into the reaction cavity (1); the exhaust port (12) is positioned on the right side of the reaction cavity (1), and the exhaust port (12) is used for exhausting gas up to the standard; the first ash outlet (13) is positioned at the bottom of the reaction chamber (1), and the first ash outlet (13) is used for discharging dust in the reaction chamber (1) out of the reaction chamber (1); the second air inlet (15) is positioned above the first air inlet (11), and the second air inlet (15) is used for introducing ammonia gas into the reaction cavity; the collecting tank (2) is positioned on the left side of the reaction cavity (1), the collecting tank (2) is communicated with the reaction cavity (1), and the collecting tank (2) is used for collecting regenerated catalysts; the guide pipe (3) is positioned on the left side of the collecting tank (2), the guide pipe (3) is respectively communicated with the reaction cavity (1) and the collecting tank (2), and the guide pipe (3) is used for conveying the regenerated catalyst in the collecting tank (2) into the reaction cavity (1); the circulating pump (4) is positioned in the conduit (3); the catalytic reaction device (5) is positioned in the reaction cavity (1), the catalytic reaction device (5) is positioned above the second air inlet (15), the catalytic reaction device (5) is of a net-shaped structure, and the catalytic reaction device (5) is used for providing a reaction environment for reactants; the rotating device (6) is positioned on the right side in the reaction cavity (1), the rotating device (6) is positioned below the catalytic reaction device (5), and the rotating device (6) is used for filtering particulate impurities in the exhaust gas and conveying the exhaust gas to be treated to the catalytic reaction device (5); the grinding device (7) is positioned in the reaction cavity (1), the grinding device (7) is positioned below the rotating device (6), and the grinding device (7) is used for removing a reaction layer on the surface of the reacted catalyst to obtain a regenerated catalyst; conveyer (8) are located reaction chamber (1), and conveyer (8) are located regulating wheel (72) below, and conveyer (8) level runs through reaction chamber (1), and conveyer (8) left side contacts with holding vessel (2), and conveyer (8) are arranged in carrying regenerated catalyst to holding vessel (2).
2. The low-temperature cyclic regeneration denitration catalyst device as set forth in claim 1, wherein: the rotating device (6) comprises a rotary disc (61), a support rod (62), a shifting plate (63), a motor I, a positioning disc (64), a balancing weight (65), a filter screen (67) and a blocking plate (68); the rotary table (61) is a cylinder, a circular cavity is arranged inside the rotary table (61), a circular groove is formed in the outer circumferential surface of the rotary table (61), and a plurality of holes communicated with the circular cavity are formed in the groove; a positioning rod and a positioning disc (64) are further arranged in the circular cavity, the positioning disc (64) is installed in the circular cavity through the positioning rod, the positioning disc (64) is an irregular cavity with the left side being semicircular and the right side being semi-elliptical, a slide way (66) is circumferentially arranged on the outer wall of the positioning disc (64), a balancing weight (65) is arranged in the bottom of the positioning disc (64), and the weight of the balancing weight (65) is larger than that of the positioning disc (64); the number of the shifting plates (63) is the same as that of the holes in the circular cavity, and the shifting plates (63) are circumferentially hinged in the grooves; the filter screen (67) is installed on one side of the shifting plate (63), through holes are formed in the shifting plate (63), and the filter screen (67) is used for filtering particle impurities in the waste gas; the blocking plate (68) is arranged on the filter screen (67), and the blocking plate (68) is used for keeping the particle impurities on the filter screen (67); the number of the supporting rods (62) corresponds to that of the shifting plates (63), one end of each supporting rod (62) penetrates through a hole in the circular cavity to be connected with the filter screen (67), the other end of each supporting rod (62) is installed on a slide way (66) on the outer wall of the positioning disc (64), the supporting rods (62) can slide circumferentially around the slide ways (66), and the supporting rods (62) are used for driving the filter screen (67) to move so as to realize vibration of the filter screen (67); the first motor is fixed on the reaction cavity (1) and used for driving the rotating disc (61) to rotate.
3. The low-temperature cyclic regeneration denitration catalyst device as set forth in claim 1, wherein: a filter screen (21) and a second ash outlet (22) are also arranged on the collecting tank (2); the filter screen (21) is positioned in the collecting tank (2), the filter screen (21) is positioned below the guide pipe (3), through holes are formed in the filter screen (21), and the through holes in the filter screen (21) can only pass through dust but cannot pass through regenerated catalysts; the second ash outlet (22) is positioned at the bottom of the collecting tank (2), and the second ash outlet (22) is used for discharging dust in the collecting tank (2).
4. The low-temperature cyclic regeneration denitration catalyst device as set forth in claim 1, wherein: the grinding device (7) comprises a grinding wheel (71), an adjusting wheel (72), a belt (73) and a motor II; the grinding wheels (71) are a plurality of in number, the grinding wheels (71) are positioned in the reaction cavity (1), and the grinding wheels (71) are used for grinding poisoned catalysts; the number of the adjusting wheels (72) is multiple, the adjusting wheels (72) and the grinding wheels (71) are horizontally distributed in a staggered manner, the adjusting wheels (72) are fixed in the reaction cavity (1), and the adjusting wheels (72) are used for adjusting gaps between the grinding wheels (71) and the adjusting wheels (72); the number of the belts (73) is a plurality, the belts (73) are positioned outside the reaction cavity (1), and the belts (73) are used for connecting the grinding wheel (71); the second motor is fixed on the reaction cavity (1), an output shaft of the second motor is connected with the grinding wheel (71), and the second motor is used for driving the grinding wheel (71) to rotate.
5. The low-temperature cyclic regeneration denitration catalyst device as set forth in claim 1, wherein: the conveying device (8) comprises a conveying belt (81), a belt wheel (82) and a motor III; the conveyor belt (81) is positioned in the reaction cavity (1), the conveyor belt (81) is used for conveying regenerated catalysts, through holes are further formed in the conveyor belt (81), the number of the through holes is multiple, the upper end of the cross section of each through hole is rectangular, the lower end of each through hole is trapezoidal, and the through holes are used for discharging dust; the reaction chamber (1) is further hinged with a square plate (14), the square plate (14) is located above the conveyor belt (81), the lower end of the square plate (14) is in contact with the conveyor belt (81), the square plate (14) is used for separating the reaction chamber (1) from the collecting tank (2), and meanwhile the square plate (14) is convenient for regenerated catalyst to enter the collecting tank (2); the number of the belt wheels (82) is two, the belt wheels (82) are positioned in the reaction cavity (1), rectangular grooves are further formed in the belt wheels (82), the number of the rectangular grooves is multiple, and the rectangular grooves are circumferentially distributed in the belt wheels (82); the rectangular groove is also provided with a transmission block (83), the transmission block (83) is connected with the rectangular groove through a spring, the number and distribution of the transmission blocks (83) are the same as those of the rectangular groove, and the transmission block (83) is used for discharging residual dust in the through hole; the third motor is fixed on the reaction cavity (1) and is used for driving the belt wheel (82) to rotate.
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| CN109513311B (en) * | 2019-01-16 | 2022-03-04 | 上海环境保护有限公司 | Waste gas treatment method for realizing high-efficiency energy-saving dynamic fluidized bed graded adsorption |
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| CN206881513U (en) * | 2017-05-19 | 2018-01-16 | 大唐环境产业集团股份有限公司 | Low-temperature smoke air SCR denitrification apparatus |
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