CN111773920A - Be applied to integrated dust removal catalytic unit of low temperature denitration - Google Patents
Be applied to integrated dust removal catalytic unit of low temperature denitration Download PDFInfo
- Publication number
- CN111773920A CN111773920A CN202010543483.5A CN202010543483A CN111773920A CN 111773920 A CN111773920 A CN 111773920A CN 202010543483 A CN202010543483 A CN 202010543483A CN 111773920 A CN111773920 A CN 111773920A
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- Prior art keywords
- dust removal
- temperature denitration
- catalyst
- grid
- low
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- 239000000428 dust Substances 0.000 title claims abstract description 44
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 13
- 239000003054 catalyst Substances 0.000 claims abstract description 32
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 238000001914 filtration Methods 0.000 abstract description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 15
- 239000003546 flue gas Substances 0.000 description 15
- 238000000034 method Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
-
- 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
- B01D53/8631—Processes characterised by a specific device
-
- 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
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention provides an integrated dust removal catalytic unit applied to low-temperature denitration, which comprises a dust removal filter bag, wherein a grid and a catalyst microporous tube are sequentially arranged in the dust removal filter bag from outside to inside along the radial direction, a cover plate is arranged at the top end of the dust removal filter bag, an air outlet hole is formed in the middle of the cover plate, a compressed air interface is further formed in the cover plate around the air outlet hole, and the compressed air interface is positioned between an inner layer and an outer layer of the grid. The invention can complete two steps of dust removal and filtration and catalytic denitration at one time, thereby saving the space of an engineering site and improving the efficiency of dust removal and denitration.
Description
Technical Field
The invention relates to the technical field of low-temperature denitration, in particular to an integrated dust removal catalytic device applied to low-temperature denitration.
Background
The ash-containing NOx-containing hot flue gas produced in the boiler is usually subjected to low temperature denitration. At present, the conventional mode is to remove dust from flue gas by a dust remover and then enter a denitration catalyst device to remove dust and denitrate hot flue gas.
However, the dust remover and the catalytic device are respectively arranged to occupy large areas, and the performance of the catalyst is affected by too high or too low temperature due to the high requirement of the low-temperature denitration process on the reaction temperature. After the flue gas passes through the dust remover, the temperature of the flue gas is reduced by about 20-30 ℃ due to the influence of air leakage of a system and heat dissipation of equipment. In order to meet the performance requirement of the catalyst, the conventional method is to increase the inlet temperature of the dust remover or perform secondary heating temperature rise on the flue gas at the outlet of the dust remover, wherein the inlet temperature of the dust remover reduces the waste heat utilization interval of the flue gas in front of the dust remover, and the requirement on the material of a filter bag is higher due to the increase of the inlet flue gas temperature, so that the equipment cost is increased; the latter needs to increase system equipment for secondary heating of flue gas, consumes a large amount of energy, and increases the complexity of the system and the overall investment cost.
Therefore, there is an urgent need in the art for a technical solution that can simplify the system, save the space, and effectively realize efficient dust removal and denitration under the condition of reducing the temperature loss of flue gas.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an integrated dust removal catalytic device applied to low-temperature denitration.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the integrated dust removal catalytic device applied to low-temperature denitration comprises a dust removal filter bag, a grid and a catalyst microporous tube are sequentially arranged in the dust removal filter bag from outside to inside along the radial direction, a cover plate is arranged at the top end of the dust removal filter bag, an air outlet hole is formed in the middle of the cover plate, a compressed air interface is further formed in the cover plate around the air outlet hole, and the compressed air interface is located between an inner layer and an outer layer of the grid.
The dust removal filter bag is in a hollow cylindrical shape.
The grating is in a hollow cylinder shape.
The grating is a double-layer metal grating.
The length of the catalyst microporous tube is 0.5-15 m.
The catalyst in the catalyst microporous tube comprises TiO2、V2O5、WO3And MoO3。
Compared with the prior art, the invention has the beneficial effects that: the catalyst microporous pipe is sleeved in the filter bag and is supported and molded by the grid, and then air is led out through the connector on the cover plate, so that two steps of dust removal and filtration and catalytic denitration can be finished at one time, the space of an engineering site is saved, the dust removal and denitration efficiency is improved, and the heat loss of flue gas is effectively reduced; the catalyst microporous tube is protected by the grating, so that the device can adopt a longer microporous tube, and the catalytic efficiency is further improved; the dust-removing filter bag and the catalyst microporous tube are shaped through the grating and the cover plate, so that the whole device can be conveniently used in a modularized way, and the device is easy to process and carry.
Drawings
Fig. 1 is a schematic structural view of the present invention.
FIG. 2 is a schematic diagram of an expanded structure of the present invention.
Fig. 3 is a partial enlarged view of the upper right corner of the present invention in an operating state.
Reference numerals: 1-a dust removal filter bag, 2-a grid, 3-a catalyst microporous tube, 4-a cover plate and 5-a compressed air interface.
Detailed Description
The invention is further illustrated by the following specific embodiments.
The integrated dust removal catalytic device applied to low-temperature denitration, as shown in fig. 1-3, comprises a dust removal filter bag 1, a grating 2 and a catalyst microporous tube 3 are sequentially arranged in the dust removal filter bag 1 from outside to inside along the radial direction, a cover plate 4 is arranged at the top end of the dust removal filter bag 1, an air outlet 6 is arranged in the middle of the cover plate 4, a compressed air connector 5 is further arranged on the cover plate 4 around the air outlet 6, and the compressed air connector 5 is positioned between the inner layer and the outer layer of the grating 2. In this embodiment, the dust-removing filter bag 1 and the grating 2 are both hollow cylinders, and the grating 2 is a double-layer metal grating. The length of the catalyst microporous tube 3 is 0.5 to 15m, 10m in this example. The catalyst in the catalyst microporous tube 3 comprises TiO2、V2O5、WO3And MoO3. The inner layer of the double-layer metal grid can support and protect the catalyst microporous tube 3, and the outer layer can support the dust-removing filter bag 1, so that the whole device is formed into a cylindrical sleeve shape. The cover plate 4 is in a ring shape, the cross section of the framework of the grating 2 is also in a ring shape, and the cover plate 4 is tightly buckled on the dust-removing filter bag 1, the grating 2 and the catalyst micro-filterAbove the skeleton formed by the perforated pipe 3. The outer diameter of the cover plate 4 is slightly larger than the outer diameter of the grating 2, so that the dust removal filter bag 1 can be just buckled, the inner diameter of the cover plate 4 is slightly smaller than the inner diameter of the grating 2, so that the catalyst microporous tube 3 can be just buckled, and after the cover plate 4 is buckled, the whole device is cylindrical, is convenient to disassemble and can be integrally modularly used.
As shown in figure 2, hot flue gas containing nitrogen oxides and dust enters the inner space of the dust removal filter bag 1 from the periphery of the device, and the flue gas in the process is filtered and then denitrated under the catalytic action of the catalyst microporous tube 3. The position of the compressed air connection 5 is located between the inner and outer layers of the grate 2, i.e. the position of the compressed air connection 5 in the radial direction is located within the extent of the grate 2. The external compressed air enters the space of the grating 2 between the dust-removing filter bag 1 and the catalyst microporous tube 3 through the compressed air interface 5, the dust-removing filter bag 1 is blown and molded, and is mixed with the filtered and catalyzed clean flue gas, and enters the catalyst microporous tube 3 through the micropores on the catalyst microporous tube 3, the clean hot flue gas flows upwards, and is finally discharged through the air outlet 6 in the middle of the cover plate 4 and conveyed to the gas-using equipment.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the present invention.
The above description is only for the preferred embodiment of the present invention, but the present invention is not limited to the above specific embodiments, and those skilled in the art can make several variations and modifications without departing from the inventive concept, which falls into the protection scope of the present invention.
Claims (6)
1. The utility model provides an integrated dust removal catalytic unit for low temperature denitration, includes dust bag (1), characterized by, along radially outside-in grid (2) and catalyst micropore pipe (3) have set gradually in dust bag (1), dust bag (1) top is provided with apron (4), exhaust vent (6) have been seted up to the centre of apron (4), apron (4) go up around compressed air interface (5) have still been seted up in exhaust vent (6), the position of compressed air interface (5) is located between the inlayer and the skin of grid (2).
2. The integrated dust removal catalyst device applied to low-temperature denitration according to claim 1, wherein the dust removal filter bag (1) is hollow cylindrical.
3. The integrated dust removal catalyst device applied to low-temperature denitration of claim 1, wherein the grid (2) is hollow cylindrical.
4. The integrated dust removal catalyst device applied to low-temperature denitration of claim 1, wherein the grid (2) is a double-layer metal grid.
5. The integrated dust removal catalyst device applied to low-temperature denitration according to claim 1, wherein the length of the catalyst microporous tube (3) is 0.5-15 m.
6. The integrated dust-removing catalyst device for low-temperature denitration according to claim 1, wherein the catalyst in the catalyst microporous tube (3) comprises TiO2、V2O5、WO3And MoO3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010543483.5A CN111773920A (en) | 2020-06-15 | 2020-06-15 | Be applied to integrated dust removal catalytic unit of low temperature denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010543483.5A CN111773920A (en) | 2020-06-15 | 2020-06-15 | Be applied to integrated dust removal catalytic unit of low temperature denitration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111773920A true CN111773920A (en) | 2020-10-16 |
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|---|---|---|---|
| CN202010543483.5A Pending CN111773920A (en) | 2020-06-15 | 2020-06-15 | Be applied to integrated dust removal catalytic unit of low temperature denitration |
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| CN (1) | CN111773920A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06233916A (en) * | 1993-02-12 | 1994-08-23 | Mitsubishi Heavy Ind Ltd | Regeneration of denitration bag filter |
| JP2012130853A (en) * | 2010-12-21 | 2012-07-12 | Mitsubishi Heavy Ind Ltd | Bag filter, and exhaust gas treatment apparatus |
| CN204051275U (en) * | 2014-08-30 | 2014-12-31 | 安徽省利特环保技术有限公司 | A kind of desulphurization denitration filter bag |
| CN204051288U (en) * | 2014-08-30 | 2014-12-31 | 安徽省利特环保技术有限公司 | A kind of waste incineration desulfurization filter cylinder |
| CN204411943U (en) * | 2015-01-13 | 2015-06-24 | 安徽省元琛环保科技有限公司 | The functional filter bag of a kind of double-deck denitration dust collecting integral |
| CN205095653U (en) * | 2015-11-09 | 2016-03-23 | 湖南城市学院 | Organic waste gas handles photocatalysis subassembly with dustproof function |
| CN107511072A (en) * | 2017-10-24 | 2017-12-26 | 安徽中韩净化设备有限公司 | A kind of flue gas ash removal denitrification apparatus |
| CN208115510U (en) * | 2018-03-15 | 2018-11-20 | 天津博仕化工科技有限公司 | A kind of split type catalysis dust-extraction unit of denitration Tuo bioxin |
| CN109833683A (en) * | 2018-10-31 | 2019-06-04 | (株)永友绿色技术 | Utilize the filter collector filter of catalyst |
| CN208990418U (en) * | 2018-04-18 | 2019-06-18 | 中国矿业大学(北京) | A kind of compound filter bag and low temperature de-dusting de-nitration integrated |
| CN110124508A (en) * | 2018-02-02 | 2019-08-16 | 天津博仕化工科技有限公司 | A kind of de- dioxin dedusting Trinity catalysis filter bag of denitration |
| CN212819155U (en) * | 2020-06-15 | 2021-03-30 | 中材节能股份有限公司 | Be applied to integrated dust removal catalytic unit of low temperature denitration |
-
2020
- 2020-06-15 CN CN202010543483.5A patent/CN111773920A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06233916A (en) * | 1993-02-12 | 1994-08-23 | Mitsubishi Heavy Ind Ltd | Regeneration of denitration bag filter |
| JP2012130853A (en) * | 2010-12-21 | 2012-07-12 | Mitsubishi Heavy Ind Ltd | Bag filter, and exhaust gas treatment apparatus |
| CN204051275U (en) * | 2014-08-30 | 2014-12-31 | 安徽省利特环保技术有限公司 | A kind of desulphurization denitration filter bag |
| CN204051288U (en) * | 2014-08-30 | 2014-12-31 | 安徽省利特环保技术有限公司 | A kind of waste incineration desulfurization filter cylinder |
| CN204411943U (en) * | 2015-01-13 | 2015-06-24 | 安徽省元琛环保科技有限公司 | The functional filter bag of a kind of double-deck denitration dust collecting integral |
| CN205095653U (en) * | 2015-11-09 | 2016-03-23 | 湖南城市学院 | Organic waste gas handles photocatalysis subassembly with dustproof function |
| CN107511072A (en) * | 2017-10-24 | 2017-12-26 | 安徽中韩净化设备有限公司 | A kind of flue gas ash removal denitrification apparatus |
| CN110124508A (en) * | 2018-02-02 | 2019-08-16 | 天津博仕化工科技有限公司 | A kind of de- dioxin dedusting Trinity catalysis filter bag of denitration |
| CN208115510U (en) * | 2018-03-15 | 2018-11-20 | 天津博仕化工科技有限公司 | A kind of split type catalysis dust-extraction unit of denitration Tuo bioxin |
| CN208990418U (en) * | 2018-04-18 | 2019-06-18 | 中国矿业大学(北京) | A kind of compound filter bag and low temperature de-dusting de-nitration integrated |
| CN109833683A (en) * | 2018-10-31 | 2019-06-04 | (株)永友绿色技术 | Utilize the filter collector filter of catalyst |
| CN212819155U (en) * | 2020-06-15 | 2021-03-30 | 中材节能股份有限公司 | Be applied to integrated dust removal catalytic unit of low temperature denitration |
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