CN112403231A - A modular integrated system for desulfurization, denitration, and VOC dust removal - Google Patents
A modular integrated system for desulfurization, denitration, and VOC dust removal Download PDFInfo
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- CN112403231A CN112403231A CN202011324982.1A CN202011324982A CN112403231A CN 112403231 A CN112403231 A CN 112403231A CN 202011324982 A CN202011324982 A CN 202011324982A CN 112403231 A CN112403231 A CN 112403231A
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- B01D53/34—Chemical or biological purification of waste gases
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- B01D53/86—Catalytic processes
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Abstract
本发明公开了一种模块化脱硫脱硝脱VOC除尘一体系统，包括：尘气室，所述尘气室的顶部开设有至少一个进风口，尘气室的底部开设有至少一个出灰口；风管道，进风管道的出风端与所述尘气室的进风口连通；设置于所述进风管道内的脱硫催化剂喷射装置；多个负载有脱硝催化剂的过滤件，多个所述过滤件设置于所述尘气室内部，且相邻的两个过滤件之间具有间隙；至少一个净气室，净气室设置于所述尘气室的一侧，所述尘气室内的气流流经所述过滤件后进入所述净气室；出风管道，所述出风管道的进风端与所述净气室的出风口连通。该模块化脱硫脱硝脱VOC除尘一体系统的结构设计可以有效地减少扬尘和实现脱硫脱硝除尘的协同处理，整体投资低，占地面积小。
The invention discloses a modular integrated system for desulfurization, denitration, and VOC dust removal, comprising: a dust chamber, at least one air inlet is opened at the top of the dust chamber, and at least one ash outlet is opened at the bottom of the dust chamber; The air outlet end of the air inlet duct is communicated with the air inlet of the dust chamber; the desulfurization catalyst injection device is arranged in the air inlet duct; a plurality of filter elements loaded with denitration catalyst, a plurality of the filter elements It is arranged inside the dust and gas chamber, and there is a gap between two adjacent filter elements; at least one clean gas chamber is arranged on one side of the dust and gas chamber, and the airflow in the dust and gas chamber flows. After passing through the filter element, it enters the clean air chamber; an air outlet pipe, the air inlet end of the air outlet pipe is communicated with the air outlet of the clean air chamber. The structural design of the modular desulfurization, denitrification, and VOC dust removal integrated system can effectively reduce dust and achieve synergistic treatment of desulfurization, denitration and dust removal, with low overall investment and small footprint.
Description
Technical Field
The invention relates to the technical field of flue gas dust removal, in particular to a modular desulfurization, denitrification, VOC removal and dust removal integrated system.
Background
With the high attention on the environmental protection work in the world, the environmental protection, energy conservation and emission reduction are the key work at present and for a long time in the future, and China has already listed the energy-saving and environment-friendly industry as the first of the strategic emerging industries. At present, environmental protection and pollution control of industrial enterprises are important. The main pollutant that industrial enterprise produced includes dust, sulphide, nitrogen oxide, VOC etc. and at present all accomplishes through single facility system to the treatment of above-mentioned pollutant, collects and controls the dust emission through the dust remover, realizes the discharge to reach standard of sulphide through desulphurization unit, realizes nitrogen oxide's emission control through the denitration facility, through VOC purifier desorption VOC.
At present, the problem of this single facility is: firstly, each facility system is independently arranged and operated, the whole investment of the equipment is very large, and the capital tension is caused to the use units; secondly, the various treatment facilities are arranged in series, so that the floor area is wide, and the waste of land resources is large; thirdly, the operation and maintenance cost of the whole set of equipment is high, and the investment of manpower, material resources and financial resources is very large. Therefore, systematic and efficient multi-pollutant cooperative treatment technology and equipment are urgently needed at present.
Disclosure of Invention
In view of the above, the present invention provides a modular integrated system for desulfurization, denitrification, VOC removal and dust removal, which has a structural design capable of effectively reducing dust emission and realizing the cooperative treatment of desulfurization, denitrification and dust removal.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides an integrative system of VOC dust removal is taken off in modularization SOx/NOx control, includes:
the top of the dust chamber is provided with at least one air inlet, and the bottom of the dust chamber is provided with at least one dust outlet;
the air outlet end of the air inlet pipeline is communicated with the air inlet of the dust air chamber;
the desulfurization catalyst injection device is arranged in the air inlet pipeline;
a plurality of filtering pieces loaded with denitration catalysts are arranged in the dust gas chamber, gaps are formed between every two adjacent filtering pieces, and the denitration catalysts are arranged in the filtering pieces and/or on the surfaces of the filtering pieces;
the air purifying chamber is arranged on one side of the dust gas chamber, and airflow in the dust gas chamber enters the air purifying chamber after flowing through the filter element;
and the air inlet end of the air outlet pipeline is communicated with the air outlet of the air purifying chamber.
Preferably, in the above-mentioned integrative system of modularization SOx/NOx control VOC removal dust removal, still include the pre-charge device, the pre-charge device sets up in a plurality of the upstream of filtering piece.
Preferably, in the above-mentioned integrative system of modularization SOx/NOx control VOC dust removal, still include set up in a plurality of guide plates in the dirt gas chamber, the guide plate sets up for the lateral wall slope of dirt gas chamber.
Preferably, the modular system for integrating desulfurization, denitrification, VOC removal and dust removal further comprises a flow guide device arranged in the air inlet pipeline, wherein the flow guide device is positioned at the upstream of the desulfurization catalyst injection device and guides the air flow to spirally descend.
Preferably, in the above-mentioned integrative system of VOC dust removal of modularization SOx/NOx control, filter is the filter bag, be provided with denitration catalyst module in the filter bag.
Preferably, in the above modular system for integrating desulfurization, denitrification, VOC removal and dust removal, the air inlet duct comprises an air inlet pipe and an air inlet box connected with the air outlet end of the air inlet pipe, which are connected in sequence; the air outlet pipeline comprises an air outlet pipe and an air outlet box, wherein the air outlet pipe and the air outlet box are sequentially connected;
the air inlet box and the air outlet box are both horn-shaped, the ventilation section of the air inlet box is gradually increased along the direction close to the dust air chamber, and the ventilation section of the air outlet box is gradually increased along the direction close to the air purifying chamber.
Preferably, in the above-mentioned modular system integrating desulfurization, denitrification, VOC removal and dust removal, the number of the air purification chambers is two, and the two air purification chambers are respectively arranged on two opposite sides of the dust chamber.
Preferably, the modular integrated system for desulfurization, denitrification, VOC removal and dust removal further comprises a VOC catalyst module, wherein the VOC catalyst module is arranged in the clean air chamber.
Preferably, the modular system integrating desulfurization, denitrification, VOC removal and dust removal further comprises an ash hopper communicated with an ash outlet of the dust chamber and an ash conveying device connected with the bottom of the ash hopper.
Preferably, in the above-mentioned modular system integrating desulfurization, denitrification, VOC removal and dust removal, the dust chamber and the air purification chamber are integrated in the same box, and the dust chamber and the air purification chamber are separated by a partition plate.
When the modularized desulfurization, denitrification, VOC removal and dust removal integrated system is applied, dust-carrying air flows through the air inlet pipeline and the air inlet at the top of the dust air chamber and enters the dust air chamber, the desulfurization catalyst injection device in the air inlet pipeline atomizes and sprays the desulfurizer, the desulfurizer can be specifically atomized into fog drops with the diameter of 0.05-0.8mm, and the flue gas enters the desulfurizer atomization absorption area in the air inlet pipeline and then contacts and reacts with the desulfurizer to complete the removal of sulfides in the flue gas. Gas in the dust gas chamber enters a plurality of filtering pieces to be filtered, and the denitration catalyst loaded on the filtering pieces reacts with nitrogen oxides in the flue gas to remove the nitrogen oxides in the flue gas. The air current after a plurality of filter piece denitration filters gets into in the air purification room, and the gas in the air purification room can be discharged through the air-out pipeline finally.
Preferably, the above-mentioned modular system integrating desulfurization, denitrification, VOC removal and dust removal may further include a VOC (volatile organic substance) catalyst module, and the VOC catalyst module 19 is disposed in the clean air chamber. The VOC catalyst module 19 is used to remove VOCs from flue gas. A VOC catalyst module 19 is provided in each clean air chamber. A sponge-like VOC catalyst module 19 may be employed. The specific surface area of the sponge-shaped VOC catalyst module 19 is more than 10 times that of the honeycomb-shaped VOC catalyst module 19, so that the occupied space can be reduced, and the VOC catalytic efficiency is improved.
In the filtering process, the dust-carrying airflow enters the dust air chamber through the air inlet at the top of the dust air chamber, so that the air inlet airflow direction is consistent with the falling direction of the dust, the dust can fall to the dust outlet at the bottom of the dust air chamber, the dust can be more favorably settled, and the raised dust is effectively reduced. In addition, the flue gas contacts reaction with the desulfurizer in the air inlet pipeline, realizes the desorption of sulfides, reacts with the denitration catalyst loaded on the filtering piece in the dust gas chamber, realizes denitration, finally realizes the synergistic treatment of dust removal, desulfurization and denitration, has low overall investment and small occupied area, and simultaneously greatly improves the working efficiency of flue gas treatment.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a modular desulfurization, denitrification, VOC removal and dust removal integrated system provided by an embodiment of the invention;
FIG. 2 is a main view of a single-layer modularized desulfurization, denitrification, VOC removal and dust removal integrated system provided by an embodiment of the invention;
fig. 3 is a schematic view of a three-layer modular desulfurization, denitrification, VOC removal and dust removal integrated system provided by an embodiment of the invention.
In fig. 1-3:
1-modularization SOx/NOx control takes off VOC dust removal integrated system, 2-air-supply line, 3-air inlet case, 4-precharge device, 5-guide plate, 6-dirt air chamber, 7-filter piece, 8-metal framework, 9-rapping device, 10-left air-purifying chamber, 11-left bellows, 12-left air-out pipe, 13-right air-purifying chamber, 14-right bellows, 15-right air-out pipeline, 16-ash bucket, 17-ash conveying device, 18-steel column, 19-VOC catalyst module, 20-individual layer modularization SOx/NOx control takes off VOC dust removal integrated system, 30-SOx/NOx control injection apparatus, 31-guiding device.
Detailed Description
The invention aims to provide a modular desulfurization, denitrification, VOC removal and dust removal integrated system, which has the structural design that the dust can be effectively reduced and the synergistic treatment of desulfurization, denitrification and dust removal can be realized.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left" and "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the positions or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus are not to be construed as limitations of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring to fig. 1-3, the system for removing dust, such as desulfurization, denitrification, VOC, comprises a dust chamber 6, an air inlet duct, a desulfurization catalyst injection device 30, a plurality of filter elements 7, at least one air purifying chamber, and an air outlet duct.
Wherein, the top of the dust and air chamber 6 is provided with at least one air inlet. I.e. the top of the dust and air chamber 6 may be open to form an air inlet, the ventilation cross-section of which covers the entire top of the dust and air chamber 6. Or, the top of the dust and air chamber 6 may be provided with a plurality of air inlets. The dust-carrying air flow enters the dust chamber 6 through an air inlet at the top of the dust chamber 6. At least one dust outlet is arranged at the bottom of the dust air chamber 6, and dust is discharged through the dust outlet at the bottom of the dust air chamber 6.
The air outlet end of the air inlet pipeline is communicated with the air inlet of the dust air chamber 6, and dust-carrying air in the air inlet pipeline flows into the dust air chamber 6 through the air outlet end of the air inlet pipeline.
The desulfurization catalyst injection device 30 is disposed in the air intake duct, and the desulfurization catalyst injection device 30 is used for atomizing and spraying the desulfurization catalyst.
The plurality of filter members 7 are disposed inside the dust chamber 6 with a gap between adjacent two filter members 7. That is, a plurality of filter members 7 are fixed in the dust chamber 6, and at least one end of each filter member 7 is connected to a side wall of the dust chamber 6. The filter member 7 is loaded with a denitration catalyst, and specifically, the inside and/or the surface of the filter member 7 is provided with the denitration catalyst.
Preferably, the dust chamber 6 has a square shape, and the plurality of filter members 7 are arranged in parallel with each other in the longitudinal direction. The axial direction of the filter member 7 may be arranged horizontally or the angle between the axial direction of the filter member 7 and the horizontal plane may be an acute angle, which is not limited herein.
The number of the air purifying chambers is one or more. The air purifying chamber is arranged at one side of the dust chamber 6, and the airflow in the dust chamber 6 enters the air purifying chamber after flowing through the filter element 7.
The air inlet end of the air outlet pipeline is communicated with the air outlet of the air purifying chamber, and the air entering the air purifying chamber after being filtered can be discharged through the air outlet pipeline.
When the modularized desulfurization, denitrification, VOC removal and dust removal integrated system is applied, dust-carrying air flows into the dust air chamber 6 through the air inlet pipeline and the air inlets at the top of the dust air chamber 6, the desulfurization catalyst injection device 30 in the air inlet pipeline atomizes and sprays the desulfurizer, the desulfurizer can be specifically atomized into fog drops with the diameter of 0.05-0.8mm, and the flue gas enters the desulfurizer atomization absorption area in the air inlet pipeline and then contacts and reacts with the desulfurizer to complete the removal of sulfides in the flue gas. The gas in the dust gas chamber 6 enters a plurality of filtering pieces 7 for filtering, and the denitration catalyst loaded on the filtering pieces 7 reacts with the nitrogen oxides in the flue gas to complete the removal of the nitrogen oxides in the flue gas. The air current after 7 denitration filters of a plurality of filter pieces gets into in the air purification room, and the gas in the air purification room can be discharged through the air-out pipeline finally. In the above-mentioned filtering process, the air intake at the top of the dust air chamber 6 of the dust air current of the belt gets into the dust air chamber 6, so the air intake air current direction is unanimous with the whereabouts direction of dust, and the dust can descend to the dust outlet of 6 bottoms of dust air chamber, is favorable to subsiding of dust more, has effectively reduced the raise dust. In addition, the flue gas contacts reaction with the desulfurizer in the air inlet pipeline, realizes the desorption of sulfides, reacts with the denitration catalyst loaded on the filtering piece 7 in the dust gas chamber 6, realizes denitration, finally realizes the synergistic treatment of dust removal, desulfurization and denitration, has low overall investment and small occupied area, and simultaneously greatly improves the working efficiency of flue gas treatment.
The dust chamber 6, the air purifying chamber and the devices inside the air purifying chamber form a modular desulfurization, denitrification, VOC removal and dust removal integrated system 1 together.
In a specific embodiment, the above-mentioned modular integrated system for desulfurization, denitrification, VOC removal and dust removal may further include a pre-charging device 4, and the pre-charging device 4 is disposed upstream of the filter member 7. Namely, the pre-charging device 4 is positioned at the upstream of the plurality of filter elements 7, and the dust-carrying airflow entering the dust air chamber 6 through the air inlet at the top of the dust air chamber 6 firstly passes through the pre-charging device 4 and then passes through the filter elements 7. Specifically, the pre-charging device 4 may be disposed in the dust chamber 6, and the pre-charging device 4 is disposed between the air inlet of the dust chamber 6 and the filter member 7. The dust air chamber 6 is provided with the pre-charging device 4 at the lower side of the air inlet, so that dust can be charged, fine dust after charging can be condensed into larger particles, one part of the fine dust directly falls off from the dust outlet along with air flow, and the other part of the fine dust forms a dust layer with a loose structure on the surface of the filtering piece 7, meanwhile, the dust is charged, so that the dust concentration at the inlet of the dust air chamber 6 can be greatly improved. Test data shows that the modularized desulfurization, denitrification, VOC removal and dust removal integrated system provided with the pre-charging device 4 can improve the filtering efficiency by one order of magnitude, obviously reduces the filtering resistance, is favorable for improving the filtering speed and prolongs the service life of the filtering piece 7.
The pre-charging device 4 is fixed in the dust chamber 6 and can be relatively fixed with the dust chamber 6 in a bolt connection mode, a clamping connection mode and the like.
In another specific embodiment, the above-mentioned modular integrated system for desulfurization, denitrification, VOC removal and dust removal further comprises a plurality of guide plates 5 disposed in the dust chamber 6, and the plurality of guide plates 5 are disposed obliquely with respect to the side wall of the dust chamber 6. Namely, the guide plate 5 and the side wall and the bottom wall of the dust and air chamber 6 are provided with included angles. A plurality of guide plates 5 are fixed in a dust air chamber 6, and a gap for air flow to pass is formed between every two adjacent guide plates 5. So set up, the band dust flue gas gets into dirt air chamber 6 under guide of guide plate 5, and the band dust flue gas changes through 5 back flow direction of guide plate, so not only can overcome the dust and directly erode and filter 7 and the easy wearing and tearing and filter the shortcoming of piece 7, can also make the inside air current distribution in dirt air chamber 6 more even, has avoided the existence at air inlet dead angle.
The deflector 5 is fixed inside the dust chamber 6, and specifically, the deflector 5 may be bolted, clamped or welded inside the dust chamber 6, which is not limited herein.
Preferably, the plurality of guide plates 5 may be arranged along a continuous bending line, or an included angle between the guide plate 5 and the side wall of the dust and air chamber 6 is not limited, and the shape, the inclination angle and the position of the plurality of guide plates 5 may be set according to actual conditions.
Further, a flow guide device 31 is arranged in the air inlet pipeline, the flow guide device 31 is positioned at the upstream of the desulfurization catalyst injection device 30, and the flow guide device 31 guides the air flow to spirally descend. The airflow channel in the guiding device 31 is spiral, so that the intake airflow spirally descends along the guiding device 31. Preferably, the desulfurization catalyst is a sodium hydroxide solution.
A plurality of shower nozzles of desulfurization catalyst injection apparatus 30 evenly set up along inlet air channel's circumference to make the comprehensive contact desulfurization catalyst of flue gas, desulfurization efficiency is higher. The axis of the flow guide device 31 is overlapped with the axis of the air inlet pipeline, so that the air inlet diffusion is facilitated.
In another embodiment, the filter member may be a filter bag. Of course, the filter element may also be a filter cartridge, and is not limited herein.
Further, be provided with denitration catalyst module in filtering, denitration catalyst module sets up inside filtering promptly. The flue gas is filtered inside from filtering a piece surface entering and filtering, gets into to filter the inside denitration catalyst module of piece and the interior nitrogen oxide reaction realization denitration of flue gas.
When filtering the piece for the filter bag, denitration catalyst module sets up in the filter bag is inside.
Of course, the denitration catalyst may be disposed on the filter material of the filter member, and is not limited thereto.
What need to explain here is, be provided with the through-hole with the air-purifying chamber intercommunication on the lateral wall of dirt air chamber 6, filter the air outlet of piece and the through-hole intercommunication on the 6 lateral walls of dirt air chamber, and filter the air outlet and the 6 lateral wall sealing connection of dirt air chamber of piece to when guaranteeing normal process, the inside of the interior gas admission of dirt air chamber 6 filters the piece, filter the inside gas flow of piece to in the air-purifying chamber.
Preferably, the air inlet pipeline comprises an air inlet pipe 2 and an air inlet box 3 connected with the air outlet end of the air inlet pipe 2 which are connected in sequence, and dust-carrying air flows enter the dust air chamber 6 after passing through the air inlet pipe 2 and the air inlet box 3 in sequence. The inlet box 3 may be horn-shaped, and the ventilation section of the inlet box 3 is gradually increased in a direction approaching the dust chamber 6. Namely, the ventilation section of the air outlet end of the air inlet box 3 is larger than that of the air inlet end. So set up, can further guarantee to get into the air current in the dirt air chamber 6 more even. The deflector 31 and the desulfurization catalyst injection means 30 are provided in the air inlet duct 2.
The air outlet pipeline comprises an air outlet pipe and an air outlet box, the air outlet pipe is connected with the air inlet end of the air outlet pipe in sequence, and air flow is discharged after passing through the air outlet box and the air outlet pipe in sequence. The air outlet box can be in a horn shape, and the ventilation section of the air outlet box is gradually increased along the direction close to the air purifying chamber. So set up, can further guarantee that the air-out air current is more even.
Preferably, the number of the air purifying chambers is two, and the two air purifying chambers are respectively arranged on two opposite sides of the dust chamber 6. The two air purifying chambers are respectively a left air purifying chamber 10 and a right air purifying chamber 13. The left air purifying chamber 10 and the right air purifying chamber 13 are both communicated with the air outlet of the filter element 7 in the dust air chamber 6. The number of the air outlet pipelines is also two and is respectively a left air outlet pipe 12 and a right air outlet pipe 15, and the number of the air outlet boxes is also two and is respectively a left air outlet box 11 and a right air outlet box 14. The left air outlet box 11 and the left air outlet pipe 12 are communicated with the inside of the left air purifying chamber 10, and the right air outlet box 14 and the right air outlet pipe 15 are communicated with the inside of the right air purifying chamber 13.
The left air outlet box 11 may be connected to a top wall of the left air-purifying chamber 10, and the right air outlet box 14 may be connected to a top wall of the right air-purifying chamber 13, which is not limited herein.
Preferably, the above-mentioned modular system integrating desulfurization, denitrification, VOC removal and dust removal may further include a VOC (volatile organic substance) catalyst module, and the VOC catalyst module 19 is disposed in the clean air chamber. The VOC catalyst module 19 is used to remove VOCs from flue gas. A VOC catalyst module 19 is provided in each clean air chamber. A sponge-like VOC catalyst module 19 may be employed. The specific surface area of the sponge-shaped VOC catalyst module 19 is more than 10 times that of the honeycomb-shaped VOC catalyst module 19, so that the occupied space can be reduced, and the VOC catalytic efficiency is improved.
Further, above-mentioned integrative system of VOC dust removal is taken off in modularization SOx/NOx control still includes the metal crate 8 that sets up in dirt air chamber 6 and sets up rapping device 9 on metal crate 8, and rapping device 9 can drive metal crate 8 and filter 7 vibrations. At least one filter element 7 is arranged in the metal frame 8 and is fixedly connected with the metal frame. The filter element 7 located in the metal frame 8 is fixedly connected to the metal frame 8. The metal frame 8 is integral with the filter element 7 inside it. One side of the metal frame 8 may be fixedly connected with the inner wall of the dust and air chamber 6. When the rapping device 9 is started, the dust on the surface of the filtering piece 7 falls off after being vibrated, so that the ash removal and the regeneration are realized.
Specifically, the number of the metal frames 8 is two, and the two metal frames 8 are respectively a left metal frame and a right metal frame, the left metal frame and the right metal frame are respectively and fixedly connected with the left side wall and the right side wall of the dust and air chamber 6, the air outlet of the filtering member 7 in the left metal frame is communicated with the left air purifying chamber 10, and the air outlet of the filtering member 7 in the right metal frame is communicated with the right air purifying chamber 13. The left end of the filter element 7 in the left metal frame is connected with the left side wall of the dust and air chamber 6, and the right end of the filter element 7 in the left metal frame is closed or covered by the filter material. The right end of the filtering piece 7 in the right metal frame is connected with the right side wall of the dust air chamber 6, and the left end of the filtering piece 7 in the right metal frame is closed or covered by the filtering material.
In the present embodiment, the denitration catalyst module may be sponge-shaped. The superficial area of spongy denitration catalyst module is more than 10 times of the superficial area of honeycomb denitration catalyst, can reduce the space and occupy, improves nitrogen oxide's catalytic efficiency. The denitration catalyst module can adopt a low-temperature denitration catalyst, the temperature range of the low-temperature denitration catalyst is 140-220 ℃, and the denitration function can be immediately performed at 140 ℃.
In order to collect the dust collected to the dust outlet in time, the modular desulfurization, denitrification, VOC removal and dust removal integrated system further comprises an ash hopper 16 communicated with the dust outlet of the dust gas chamber 6 and an ash conveying device 17 connected with the bottom of the ash hopper 16. The top opening of the ash hopper 16 is connected with the ash outlet, so that the dust falls into the ash outlet and then enters the ash hopper 16, and finally is transferred through the ash conveying device 17.
In the above embodiments, the ash conveying device 17 may be a screw rod device, a pneumatic device, etc., and is not limited herein.
In a preferred embodiment, the dust chamber 6 and the air purifying chamber are integrated in the same box, and the dust chamber 6 and the air purifying chamber are separated by a partition plate. So, filter piece 7, precharge device 4, guide plate 5 and rapping device and all can be integrated in the box, the modularization preparation processing of being more convenient for, all spare parts are basically finished at mill's processing, transport the on-the-spot equipment and can make this modularization SOx/NOx control and take off VOC integrative system that removes dust, reduce construction cycle more than 2/3 than ordinary dust remover. The underside of the tank may be provided with steel posts 18 to support the tank.
Can use according to operating mode condition and filtration area individual layer modularization SOx/NOx control VOC dust removal integrated system 20 during specific application, also can a plurality of modularization SOx/NOx control VOC dust removal integrated system stack connection group use together, save occupation of land space, improve production efficiency. The schematic diagram of the three modularized desulfurization, denitrification, VOC removal and dust removal integrated systems in a superposed connection mode is shown in FIG. 3.
As a more specific example, the modularized desulfurization, denitrification, VOC-removal and dust-removal system comprises a dust chamber 6, an air inlet pipe, an air inlet box 3, a flow guide device 31, a desulfurization catalyst injection device 30, a pre-charging device 4, a flow guide plate 5, a plurality of filter pieces 7, a VOC catalyst module 19, a left air purifying chamber 10, a left metal frame, a left air outlet box 11, a left air outlet pipe 12, a left rapping device, a right air purifying chamber, a right metal frame, a right rapping device, a right air outlet box 14, a right air outlet pipe 15, a denitration catalyst module, an ash hopper 16 and an ash conveying device 17. Wherein, the pre-charging device 4 and the guide plate 5 are positioned in the dust air chamber 6, and the pre-charging device 4 is positioned above the guide plate 5. The left metal frame and the right metal frame are distributed in the dust air chamber 6 in a left-right mode, a plurality of filtering pieces 7 are arranged in the left metal frame and the right metal frame, and the air outlets of the filtering pieces 7 in the left air purifying chamber 10 and the left metal frame are communicated. The right air purifying chamber 13 is communicated with the air outlet of the filtering piece 7 in the right metal frame. The VOC catalyst modules 19 are disposed in both the left air-purifying chamber 10 and the right air-purifying chamber 13.
When the modular integrated system for desulfurization, denitrification, VOC removal and dust removal in the above embodiment is used for flue gas treatment, dust-carrying airflow sequentially enters the dust air chamber 6 through the air inlet pipeline and the air inlet box 3, flue gas spirally descends through the backflow device in the air inlet pipeline, the desulfurization catalyst injection device 30 in the air inlet pipeline atomizes and sprays a desulfurizer, and the flue gas reacts with the sprayed desulfurizer to realize desulfurization. The flue gas passes through the pre-charging device 4 and the guide plate 5 in the dust chamber 6 in sequence, part of fine dust is condensed into large-particle dust under the action of the pre-charging device 4, the direction of the air flow is changed after passing through the guide plate 5, and part of the large-particle dust falls into the dust hopper 16 under the action of inertia. Part of the air flow entering the dust air chamber 6 enters the left air purifying chamber 10 after being filtered by the filter element 7 in the left metal frame, and the other part of the air flow enters the right air purifying chamber 13 after being filtered by the filter element 7 in the right metal frame. Inside dusty air current gets into through filtering 7 surfaces promptly, the dust is held back on the surface, and the denitration is realized with the denitration catalyst reaction of load on filtering 7 to the flue gas, and clean gas gets into the air-purifying chamber of both sides respectively through filtering 7 air outlets of piece. The gas in the clean air chambers at two sides reacts with the VOC catalyst module 19 to remove VOC, in particular VOC and O in the flue gas2React to generate CO2And H2And O, realizing effective removal of VOC in the high-temperature flue gas. Therefore, the modularized integrated system for desulfurization, denitrification, VOC removal and dust removal adopts the mode of upper air inlet and side air outlet, and dusty airflow is from the upper part of the dust air chamber 6The part enters a dust air chamber 6, and is discharged through air purifying chambers at the left side and the right side of the dust air chamber 6 and an air outlet system after being filtered and purified by a filter element 7. The trend of the air inlet flow is consistent with the falling direction of the dust, so that the dust can be rapidly settled downwards.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides an integrative system of VOC dust removal is taken off in modularization SOx/NOx control which characterized in that includes:
the dust collection device comprises a dust chamber (6), wherein the top of the dust chamber (6) is provided with at least one air inlet, and the bottom of the dust chamber (6) is provided with at least one dust outlet;
the air outlet end of the air inlet pipeline is communicated with the air inlet of the dust air chamber (6);
a desulfurization catalyst injection device (30) arranged in the air inlet pipeline;
a plurality of filtering pieces (7) loaded with denitration catalysts, wherein the plurality of filtering pieces (7) are arranged inside the dust chamber (6), a gap is formed between every two adjacent filtering pieces (7), and the inside and/or the surface of each filtering piece is/are provided with the denitration catalysts;
at least one air purifying chamber arranged at one side of the dust chamber (6), wherein the airflow in the dust chamber (6) enters the air purifying chamber after flowing through the filter element (7);
and the air inlet end of the air outlet pipeline is communicated with the air outlet of the air purifying chamber.
2. The integrated system for desulfurization, denitrification, VOC removal and dust removal of claim 1, further comprising a pre-charging device (4), wherein said pre-charging device (4) is disposed upstream of said plurality of filter elements (7).
3. The integrated system for desulfurization, denitrification, VOC removal and dust removal of claim 1, further comprising a plurality of baffles (5) disposed in said dust chamber (6), wherein said baffles (5) are disposed obliquely with respect to the side walls of said dust chamber (6).
4. The integrated system of modular desulfurization, denitrification, VOC removal and dust removal as set forth in claim 1, further comprising a flow guide device (31) disposed in said air inlet duct, wherein said flow guide device (31) is located upstream of said desulfurization catalyst injection device (30), and said flow guide device (31) guides the air flow to spirally descend.
5. The integrated modular SOx/NOx/VOC removal/dust control system of claim 1, wherein the filter is a filter bag, and the denitration catalyst module is disposed in the filter bag.
6. The modular integrated system for desulfurization, denitrification, VOC removal and dust removal as claimed in claim 1, wherein the air inlet pipeline comprises an air inlet pipe (2) and an air inlet box (3) connected with the air outlet end of the air inlet pipe (2) which are connected in sequence; the air outlet pipeline comprises an air outlet pipe and an air outlet box, wherein the air outlet pipe and the air outlet box are sequentially connected;
the air inlet box (3) and the air outlet box are horn-shaped, the ventilation section of the air inlet box (3) is close to the direction of the dust air chamber (6) and gradually increases, and the ventilation section of the air outlet box is close to the direction of the air purifying chamber and gradually increases.
7. The modular desulfurization, denitrification, VOC removal and dust removal integrated system as claimed in claim 1, wherein the number of said air-purifying chambers is two, and said two air-purifying chambers are respectively disposed on two opposite sides of said dust chamber (6).
8. The integrated system of claim 1, further comprising a VOC catalyst module (19), wherein the VOC catalyst module (19) is disposed in the clean air chamber.
9. The integrated system for desulfurization, denitrification, VOC removal and dust removal as claimed in claim 1, further comprising an ash hopper (16) communicated with the ash outlet of said dust chamber (6) and an ash conveying device (17) connected to the bottom of said ash hopper (16).
10. The integrated system for desulfurization, denitrification, VOC removal and dust removal of any one of claims 1-9, wherein the dust chamber (6) and the air purifying chamber are integrated in the same box, and the dust chamber (6) and the air purifying chamber are separated by a partition.
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| CN202011324982.1A CN112403231B (en) | 2020-11-23 | 2020-11-23 | A modular integrated system for desulfurization, denitrification, VOC removal, and dust removal. |
| PCT/CN2020/138901 WO2022105008A1 (en) | 2020-11-23 | 2020-12-24 | Modular desulfurization, denitration, voc removal, and dust removal integrated system |
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