CN113441006A - Efficient anti-blocking rotary SCR system and working method thereof - Google Patents
Efficient anti-blocking rotary SCR system and working method thereof Download PDFInfo
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- CN113441006A CN113441006A CN202110817209.7A CN202110817209A CN113441006A CN 113441006 A CN113441006 A CN 113441006A CN 202110817209 A CN202110817209 A CN 202110817209A CN 113441006 A CN113441006 A CN 113441006A
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims abstract description 49
- 230000003197 catalytic effect Effects 0.000 claims abstract description 38
- 239000004071 soot Substances 0.000 claims abstract description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000003546 flue gas Substances 0.000 claims abstract description 27
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 21
- 230000008021 deposition Effects 0.000 claims abstract description 10
- 239000000428 dust Substances 0.000 claims abstract description 8
- 206010022000 influenza Diseases 0.000 claims description 36
- 238000006555 catalytic reaction Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 15
- 230000000903 blocking effect Effects 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 abstract description 2
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 238000007664 blowing Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 231100000481 chemical toxicant Toxicity 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
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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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention discloses a high-efficiency anti-blocking rotary SCR system and a working method thereof, belonging to the field of industrial waste gas treatment. The system comprises a rotary flue, a rotary catalytic device, a soot blower, a rectifying grid, a reducing agent pipeline, an air preheater, a soot deposition hopper and a denitration flue; the denitration flue I and the denitration flue II are arranged in parallel, the inlet flue of the denitration flue I and the inlet flue of the denitration flue II are located on one side of the left area of the rotary catalytic device, the inlet flue of the rotary flue is located on the other side of the left area of the rotary catalytic device, the outlet flue of the denitration flue I and the outlet flue of the denitration flue II are located on one side of the right area of the rotary catalytic device, and the outlet flue of the rotary flue is located on the other side of the right area of the rotary catalytic device. When the system operates, the flue gas can pass through the catalyst twice, the utilization efficiency of the catalyst is greatly improved, and the flue gas flows in opposite directions when passing through the catalyst, so that dust adsorbed on the catalyst is effectively washed away.
Description
Technical Field
The invention relates to a high-efficiency anti-blocking rotary SCR system and a working method thereof, belonging to the field of industrial waste gas treatment.
Background
At present, fossil energy is used as main energy in China, nitrogen oxides with serious pollution characteristics are inevitably generated in the process of using the fossil energy, and in order to reduce the generation of the pollutants, a Selective Catalytic Reduction (SCR) denitration technology is generated. SCR has denitration efficiency height, maintains advantages such as simple relatively, operation safety. However, when the equipment runs, the dust content in the flue gas is too large, and the soot blower is difficult to clean dust of the catalyst in time and efficiently to cause blockage, so that the denitration efficiency is greatly reduced; in addition, such equipment generally requires the use of three to four layers of catalyst in large quantities. The catalyst is used as an expensive and toxic chemical product, and a large amount of the catalyst is used, so that resources are wasted and the environment is polluted.
Disclosure of Invention
Based on the situation and the current situation, the invention provides the efficient anti-blocking rotary SCR system and the working method thereof through deep research aiming at the system flow and the characteristics of all parameters, has the characteristics of high catalyst use efficiency and good anti-blocking characteristic, and can generate obvious environmental protection and economic benefits.
The technical scheme adopted by the invention for solving the problems is as follows: a high-efficiency anti-blocking rotary SCR system is characterized by comprising a rotary flue, a rotary catalytic device, a first soot blower, a second soot blower, a first rectifying grid, a second rectifying grid, a reducing agent pipeline, an air preheater, a soot deposition hopper, a first denitration flue and a second denitration flue; denitration flue I and denitration flue II are arranged side by side, the entry flue of denitration flue I and denitration flue II is located the one side of rotatory catalytic unit's left region, the entry flue of gyration flue is located the opposite side of rotatory catalytic unit's left region, the export flue of denitration flue I and denitration flue II is located the one side of rotatory catalytic unit's right region, the export flue of gyration flue is located the opposite side of rotatory catalytic unit's right region.
Furthermore, the inlet flues of the first denitration flue and the second denitration flue correspond to the inlet flues of the rotary flues, and the outlet flues of the first denitration flue and the second denitration flue correspond to the outlet flues of the rotary flues.
Further, the rotary catalytic device comprises a rotary shaft, a catalyst grid, a catalyst, a vertical sealing sheet, a horizontal sealing sheet and a circumferential sealing sheet; the vertical direction, the horizontal direction, the circumference of sealing piece to sealing piece, circumference respectively to rotating catalysis device seals, the rotation axis is located rotating catalysis device's middle part, catalyst grid circumference distributes on rotating catalysis device, the catalyst that is used for denitration catalytic reaction is equipped with in the catalyst grid, the catalyst is single-layer or multilayer.
Furthermore, a flue which is correspondingly communicated with the denitration flue I and the denitration flue II is arranged in the rotary flue.
Furthermore, the first soot blower and the second soot blower are telescopic soot blowers, and are provided with soot blowing openings and soot blocking cover plates which are made of metal materials; the first soot blower is installed in an inlet flue of the first denitration flue and an inlet flue of the second denitration flue, and the second soot blower is installed in an outlet flue of the rotary flue.
Furthermore, the first rectification grid is arranged in the inlet flues of the first denitration flue and the second denitration flue, and the first rectification grid is positioned below the first ash blower; the second rectifying grating is arranged in an outlet flue of the rotary flue, and the second rectifying grating is positioned above the second soot blower.
Furthermore, a nozzle and a protective cover plate are arranged on the reducing agent pipeline, and the nozzle is made of metal and has a round table-shaped structure; the reducing agent pipeline is installed in inlet flues of the first denitration flue and the second denitration flue, and is located below the first rectification grid.
Further, the air preheater is connected with outlet flues of the first denitration flue and the second denitration flue; the ash deposition hopper is arranged at the bottommost part of the inlet flues of the first denitration flue and the second denitration flue, a first ash remover, a second ash remover and a third ash remover are arranged above the ash deposition hopper, and the first ash remover, the second ash remover and the third ash remover are all in an ellipsoid structure and are uniformly distributed in the denitration flues; the included angle between the first ash falling device and the horizontal direction is 90 ℃, the included angle between the second ash falling device and the horizontal direction is 70 ℃, and the included angle between the third ash falling device and the horizontal direction is 50 ℃.
The working method comprises the following steps: flue gas flows into the first denitration flue, and when passing through the inlet flue of the first denitration flue, the flue gas is mixed with a reducing agent sprayed out of the reducing agent pipeline, then the flue gas is rectified by the first rectifying grating, and then the flue gas enters the rotary catalytic device; the rotary catalytic device drives the catalyst to be in a horizontal rotary motion state; the flue gas is subjected to denitration catalytic reaction when passing through the catalyst, then flows into the rotary flue, and then flows into the rotary catalytic device for denitration catalytic reaction after being rectified by the second rectifying grating; finally, the flue gas enters an outlet flue of the first denitration flue to complete denitration catalytic reaction; in the process, the flue gas is subjected to denitration catalytic reaction twice through the catalyst, so that the utilization rate of the catalyst is improved; the flue gas direction is opposite when passing through the catalyst twice, and dust particles in the catalyst can be effectively washed and removed.
Compared with the prior art, the invention has the following advantages and effects: when the flue gas passes through the catalyst, the flue gas can pass through the catalyst twice, so that the utilization efficiency of the catalyst is greatly improved, and the flue gas flows in opposite directions when passing through the catalyst, so that dust adsorbed on the catalyst is effectively washed away; in addition, the system provided by the invention has reasonable sealing device, reducing agent spraying and mixing system, rectifying device and soot blowing system, and effectively ensures the high-efficiency and stable operation of the system.
Drawings
FIG. 1 is a schematic view of the overall structure of the apparatus of the present invention;
FIG. 2 is a schematic view of plane A-A of FIG. 1;
FIG. 3 is a schematic view of plane C-C of FIG. 1;
FIG. 4 is a schematic view of the D-D surface of FIG. 1;
FIG. 5 is a schematic view of plane E-E of FIG. 1;
FIG. 6 is a schematic view of the plane F-F in FIG. 1;
FIG. 7 is a schematic view of plane B-B of FIG. 1;
FIG. 8 is a schematic diagram of a reductant line configuration of the present invention;
FIG. 9 is a schematic diagram of a sootblower configuration of the present invention.
In the figure: the device comprises a rotary flue 1, a rotary catalytic device 2, a first ash blower 31, a second ash blower 32, a first rectifying grid 41, a second rectifying grid 42, a reducing agent pipeline 5, an air preheater 6, an ash accumulation hopper 7, a first denitration flue 8, a second denitration flue 9, a rotary shaft 20, a catalyst grid 21, a catalyst 22, a soot blowing opening 332, an ash blocking cover plate 331, a nozzle 51, a protective cover plate 52, a first ash falling device 71, a second ash falling device 72 and a third ash falling device 73.
Detailed Description
The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.
Examples are given.
Referring to fig. 1 to 9, in the present embodiment, an efficient anti-blocking rotary SCR system includes a rotary flue 1, a rotary catalytic device 2, a first ash blower 31, a second ash blower 32, a first rectification grid 41, a second rectification grid 42, a reducing agent pipeline 5, an air preheater 6, an ash deposition bucket 7, a first denitration flue 8, and a second denitration flue 9; the denitration flue I8 and the denitration flue II 9 are arranged in parallel, the inlet flues of the denitration flue I8 and the denitration flue II 9 are positioned on one side of the left area of the rotary catalytic device 2, the inlet flue of the rotary flue 1 is positioned on the other side of the left area of the rotary catalytic device 2, the outlet flues of the denitration flue I8 and the denitration flue II 9 are positioned on one side of the right area of the rotary catalytic device 2, and the outlet flue of the rotary flue 1 is positioned on the other side of the right area of the rotary catalytic device 2.
The inlet flues of the first denitration flue 8 and the second denitration flue 9 correspond to the inlet flues of the rotary flue 1, and the outlet flues of the first denitration flue 8 and the second denitration flue 9 correspond to the outlet flues of the rotary flue 1.
The rotary catalytic device 2 comprises a rotary shaft 20, a catalyst grid 21, a catalyst 22, a vertical sealing sheet, a horizontal sealing sheet and a circumferential sealing sheet; the vertical sealing piece, the horizontal sealing piece and the circumferential sealing piece respectively seal the vertical direction, the horizontal direction and the circumferential direction of the rotary catalytic device 2, the rotary shaft 20 is positioned in the middle of the rotary catalytic device 2, the catalyst grids 21 are circumferentially distributed on the rotary catalytic device 2, the catalyst 22 for denitration catalytic reaction is arranged in the catalyst grids 21, and the catalyst 22 is single-layer or multi-layer.
And flues which are respectively communicated with the denitration flue I8 and the denitration flue II 9 are arranged in the rotary flue 1.
The first ash blower 31 and the second ash blower 32 are telescopic ash blowers, the first ash blower 31 and the second ash blower 32 are provided with a nozzle 332 and an ash blocking cover plate 331, and the nozzle 332 and the ash blocking cover plate 331 are both made of metal materials; the first soot blower 31 is installed in the inlet flues of the first denitration flue 8 and the second denitration flue 9, and the second soot blower 32 is installed in the outlet flue of the rotary flue 1.
The first rectifying grating 41 is arranged in the inlet flues of the first denitration flue 8 and the second denitration flue 9, and the first rectifying grating 41 is positioned below the first ash blower 31; a second straightening grate 42 is mounted in the outlet flue of the rotary flue 1, and the second straightening grate 42 is located above the second sootblowers 32.
The reducing agent pipeline 5 is provided with a nozzle 51 and a protective cover plate 52, and the nozzle 51 is made of metal and has a circular truncated cone-shaped structure; the reducing agent pipeline 5 is installed in the inlet flues of the denitration flue I8 and the denitration flue II 9, and the reducing agent pipeline 5 is positioned below the first rectifying grid 41.
The air preheater 6 is connected with outlet flues of the denitration flue I8 and the denitration flue II 9; the ash deposition hopper 7 is arranged at the bottommost part of the inlet flues of the denitration flue I8 and the denitration flue II 9, a first ash remover 71, a second ash remover 72 and a third ash remover 73 are arranged above the ash deposition hopper 7, and the first ash remover 71, the second ash remover 72 and the third ash remover 73 are all in an ellipsoid structure and are uniformly distributed in the denitration flues; the included angle between the first ash falling device 71 and the horizontal direction is 90 ℃, the included angle between the second ash falling device 72 and the horizontal direction is 70 ℃, and the included angle between the third ash falling device 73 and the horizontal direction is 50 ℃.
The working method comprises the following steps: flue gas flows into the denitration flue I8, and when the flue gas passes through the inlet flue of the denitration flue I8, the flue gas is mixed with the reducing agent sprayed by the reducing agent pipeline 5, then the flue gas is rectified by the first rectifying grating 41, and then the flue gas enters the rotary catalytic device 2; the rotary catalytic device 2 drives the catalyst 22 to be in a horizontal rotary motion state; the flue gas is subjected to denitration catalytic reaction when passing through the catalyst 22, then flows into the rotary flue 1, and then flows into the rotary catalytic device 2 after being rectified by the second rectifying grating 42 to be subjected to denitration catalytic reaction; finally, the flue gas enters an outlet flue of the denitration flue I8 to complete denitration catalytic reaction; in the process, the flue gas passes through the catalyst 22 twice for denitration catalytic reaction, so that the utilization rate of the catalyst is improved; the flue gas passes through the catalyst 22 twice in opposite directions, so that dust particles in the catalyst can be effectively washed and removed.
Those not described in detail in this specification are well within the skill of the art.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (8)
1. A high-efficiency anti-blocking rotary SCR system is characterized by comprising a rotary flue (1), a rotary catalytic device (2), a first soot blower (31), a second soot blower (32), a first rectifying grid (41), a second rectifying grid (42), a reducing agent pipeline (5), an air preheater (6), an ash deposition hopper (7), a denitration flue I (8) and a denitration flue II (9); the denitration flue I (8) and the denitration flue II (9) are arranged in parallel, the inlet flues of the denitration flue I (8) and the denitration flue II (9) are positioned on one side of the left area of the rotary catalytic device (2), the inlet flue of the rotary flue (1) is positioned on the other side of the left area of the rotary catalytic device (2), the outlet flues of the denitration flue I (8) and the denitration flue II (9) are positioned on one side of the right area of the rotary catalytic device (2), and the outlet flue of the rotary flue (1) is positioned on the other side of the right area of the rotary catalytic device (2); the first soot blower (31) is installed in the inlet flues of the denitration flue I (8) and the denitration flue II (9), and the second soot blower (32) is installed in the outlet flue of the rotary flue (1); the first rectifying grating (41) is arranged in inlet flues of the first denitration flue (8) and the second denitration flue (9), and the first rectifying grating (41) is positioned below the first ash blower (31); the second rectifying grating (42) is arranged in an outlet flue of the rotary flue (1), and the second rectifying grating (42) is positioned above the second soot blower (32); the reducing agent pipeline (5) is arranged in inlet flues of the denitration flue I (8) and the denitration flue II (9), and the reducing agent pipeline (5) is positioned below the first rectifying grid (41); the air preheater (6) is connected with outlet flues of the denitration flue I (8) and the denitration flue II (9); the ash deposition hopper (7) is arranged at the bottom of inlet flues of the denitration flue I (8) and the denitration flue II (9), and a first ash remover (71), a second ash remover (72) and a third ash remover (73) are arranged above the ash deposition hopper (7).
2. The efficient blockage-preventing rotary-type SCR system as recited in claim 1, wherein inlet flues of the denitration flue I (8) and the denitration flue II (9) correspond to inlet flues of the rotary flue (1), and outlet flues of the denitration flue I (8) and the denitration flue II (9) correspond to outlet flues of the rotary flue (1).
3. A high efficiency anti-clogging rotary-type SCR system as defined in claim 1, wherein the rotary catalyst device (2) comprises a rotary shaft (20), a catalyst grid (21), a catalyst (22), a vertical sealing fin, a horizontal sealing fin and a circumferential sealing fin; the vertical to gasket, level to gasket, circumference to the gasket seal up to vertical, level to, the circumference of rotation catalytic unit (2) respectively, rotation axis (20) are located the middle part of rotatory catalytic unit (2), catalyst grid (21) circumference distributes on rotatory catalytic unit (2), catalyst (22) that are used for denitration catalytic reaction are equipped with in catalyst grid (21), catalyst (22) are individual layer or multilayer.
4. The efficient blockage-preventing rotary SCR system as recited in claim 1, wherein the rotary flue (1) is internally provided with flues correspondingly communicated with the denitration flue I (8) and the denitration flue II (9), respectively.
5. The high-efficiency blockage-preventing rotary type SCR system according to claim 1, wherein the first soot blower (31) and the second soot blower (32) are telescopic soot blowers, each of the first soot blower (31) and the second soot blower (32) is provided with a nozzle (332) and a dust blocking cover plate (331), and each of the nozzles (332) and the dust blocking cover plates (331) is made of metal.
6. A high-efficiency anti-blocking rotary-type SCR system as recited in claim 1, wherein the reducing agent pipe (5) is provided with a nozzle (51) and a protective cover plate (52), and the nozzle (51) is made of metal and has a truncated cone-shaped structure.
7. The high efficiency anti-clogging rotary-type SCR system of claim 1, wherein said first ash-drop device (71), second ash-drop device (72) and third ash-drop device (73) are all ellipsoid structures; the included angle between the first ash falling device (71) and the horizontal direction is 90 ℃, the included angle between the second ash falling device (72) and the horizontal direction is 70 ℃, and the included angle between the third ash falling device (73) and the horizontal direction is 50 ℃.
8. A method of operating a high efficiency anti-clogging rotary-type SCR system according to any one of claims 1-7, characterized by the process of: flue gas flows into the denitration flue I (8), and when passing through the inlet flue of the denitration flue I (8), the flue gas is mixed with a reducing agent sprayed by the reducing agent pipeline (5), then is rectified by the first rectifying grating (41), and then enters the rotary catalytic device (2); the rotary catalytic device (2) drives the catalyst (22) to be in a horizontal rotary motion state; the flue gas is subjected to denitration catalytic reaction when passing through the catalyst (22), then flows into the rotary flue (1), is rectified by the second rectifying grating (42), and then flows into the rotary catalytic device (2) to be subjected to denitration catalytic reaction; and finally, enabling the flue gas to enter an outlet flue of the denitration flue I (8) to complete denitration catalytic reaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110817209.7A CN113441006A (en) | 2021-07-20 | 2021-07-20 | Efficient anti-blocking rotary SCR system and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110817209.7A CN113441006A (en) | 2021-07-20 | 2021-07-20 | Efficient anti-blocking rotary SCR system and working method thereof |
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| CN113441006A true CN113441006A (en) | 2021-09-28 |
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2021
- 2021-07-20 CN CN202110817209.7A patent/CN113441006A/en active Pending
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Application publication date: 20210928 |