WO2019128727A1 - Appareil de dénitration et de dénitration intégré à haute température - Google Patents

Appareil de dénitration et de dénitration intégré à haute température Download PDF

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Publication number
WO2019128727A1
WO2019128727A1 PCT/CN2018/120890 CN2018120890W WO2019128727A1 WO 2019128727 A1 WO2019128727 A1 WO 2019128727A1 CN 2018120890 W CN2018120890 W CN 2018120890W WO 2019128727 A1 WO2019128727 A1 WO 2019128727A1
Authority
WO
WIPO (PCT)
Prior art keywords
dust removal
denitration
integrated device
flue
temperature denitration
Prior art date
Application number
PCT/CN2018/120890
Other languages
English (en)
Chinese (zh)
Inventor
聂华
吴其荣
喻江涛
刘宇
吉庆
范振兴
黎方潜
周川
王进
周川雄
Original Assignee
国家电投集团远达环保工程有限公司重庆科技分公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 国家电投集团远达环保工程有限公司重庆科技分公司 filed Critical 国家电投集团远达环保工程有限公司重庆科技分公司
Publication of WO2019128727A1 publication Critical patent/WO2019128727A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/18—Cleaning-out devices
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—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
    • 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
    • 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
    • B01D53/90—Injecting reactants

Definitions

  • the invention relates to the field of flue gas purification, and more particularly to an integrated equipment for high temperature denitration and dust removal.
  • the present invention provides an integrated equipment for high temperature denitration and dust removal.
  • the present invention adopts the following technical solutions:
  • a body comprising at least one body unit, the body unit being a V-shaped plate-like structure, the body being disposed in a flue or a reactor to denitrate and dedust the flue gas flowing through;
  • a ash hopper is disposed outside the flue or reactor and below the body to collect dust removed by the body.
  • the body is composed of a plurality of body units side by side, and the body unit includes:
  • a bending member comprising two solid rectangular plates closely connected to each other at corresponding edges, the bent portion having a substantially V-shaped cross section;
  • the bending member is made of FRP, carbon steel or stainless steel.
  • the composite member has a porous structure, and the compression loss coefficient of the bending member is greater than the pressure loss coefficient of the composite member.
  • the composite member includes:
  • a second ply having a porous structure and made of a ceramic material or other wear resistant material, the second ply being attached to the first ply.
  • the first ply is formed of a catalyst material having denitration.
  • the second layer is made of one or more of corundum, mullite, cordierite, aluminum silicate fiber, and silicon carbide.
  • the high-temperature denitration and dust removal integrated device further includes: a reverse purge system disposed on a side of the flue or reactor facing the first ply.
  • an angle between two rectangular plates of each of the bending members is 15° or more and less than 180°.
  • the body is formed in one or more layers in the flow direction of the flue gas of the flue.
  • the number of said bodies per layer is set according to the size of the flue or reactor, and generally includes four or more said unit units which are connected to each other and juxtaposed.
  • the ash hopper is formed in a tapered shape.
  • the V-shaped plate-shaped body is disposed in the flue or the reactor to remove the dust in the flue or the reactor, and the dust is collected under the body.
  • the ash bucket reduces the running cost by optimizing and improving the existing device.
  • the high-temperature off-load and dust-removing integrated device has small pressure loss and small influence on the flow of the flue gas, and can effectively remove nitrogen in the fly ash and the flue gas at high temperature. Oxide, which can reduce the wear and clogging of the fly ash in the SCR system on the catalyst and subsequent equipment, and improve the overall denitration and dust removal efficiency of the SCR denitration system.
  • FIG. 1 is a schematic structural view of an integrated equipment for high-temperature denitration and dust removal according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a body of an integrated equipment for high-temperature denitration and dust removal according to an embodiment of the present invention.
  • the high-temperature denitration and dust removal integrated device 100 according to an embodiment of the present invention will be specifically described below with reference to the accompanying drawings.
  • a high temperature denitration and dust removal integrated apparatus 100 includes a body 10 and a hopper 20.
  • the body 10 includes at least one body unit, the body unit is a V-shaped plate-like structure, and the body 10 is disposed in a flue or a reactor to denitrify and remove dust flowing through the flue gas, and the ash hopper 20 is disposed in the flue. Or outside the reactor and below the body 10 to collect the dust removed by the body 10.
  • the high-temperature denitration and dust removal integrated device 100 is mainly composed of a body 10 and a hopper 20, wherein the body 10 includes at least one body unit, the body unit is a V-shaped plate, and the body 10 is disposed in a passage through which the smoke flows.
  • the body 10 can be arranged in the flue or the reactor, the flow velocity of the flue gas in the passage is ⁇ 15 m/s, and the ash bucket 20 is provided below the body 10 and outside the flue or the reactor, and the hopper 20 is used. The dust removed from the body 10 is collected.
  • the high-temperature denitration and dust removal integrated apparatus 100 removes the dust in the flue or the reactor by disposing the V-shaped plate-shaped body 10 in the flue or the reactor, and is in the body 10
  • the ash bucket 20 for collecting dust is provided below, and the operation cost is reduced by optimizing and improving the existing device.
  • the high-temperature off-load dust-removing integrated device 100 has small pressure loss, has little influence on the flow of the flue gas, and can effectively take off at a high temperature. In addition to fly ash, improve the efficiency of the SCR system.
  • the body 10 is composed of a plurality of body units 11 side by side, and the body unit 11 includes a bending member 12 and two composite members 13.
  • the bending member 12 includes two solid rectangular plates that are closely connected to each other at the corresponding edges, and the cross-section of the bending member 12 is substantially V-shaped, that is, an angle is formed between the two rectangular plates.
  • This structure is very simple.
  • Each of the composite members 13 is formed substantially as a perforated rectangular plate, and each composite member 13 is in a plane in which a corresponding rectangular plate of the bent member 12 is located from an edge opposite to the edge to be tightly joined, away from the edge of the tight connection. extend.
  • each composite member 13 and a corresponding one of the rectangular members 12 are substantially coplanar.
  • the composite member 13 is used for denitration and dust removal of the flue gas, and the number of the unit units 11 is set to be related to the width of the flue or the reactor.
  • the bending member 12 is made of FRP, carbon steel or stainless steel, and the bending member may be a flat layer made of these materials.
  • the composite member 13 is of a porous structure, and the pressure loss coefficient of the bending member 12 is greater than the pressure loss coefficient of the composite member 13.
  • the composite member 13 is a composite structure and includes a first ply 14 and a second ply 15.
  • the first ply 14 has a porous channel structure and is made of a catalyst for performing a denitration reaction.
  • the porous channel structure is a porous structure having a plurality of channels.
  • the second ply 15 has a porous structure and is made of a ceramic material, and the second ply 15 is attached to the first ply 14 .
  • the second ply 15 is made of one or more of corundum, mullite, cordierite, aluminum silicate fiber, and silicon carbide.
  • the first ply 14 is formed of a Vi 2 O 5 —TiO 2 /WO 3 material and subjected to denitration reaction with nitrogen oxides in the flue gas to achieve a denitration function.
  • the porous ceramic structure of the second layer 15 is used for removing fly ash in the flue gas, thereby achieving the purpose of simultaneous denitration and dust removal of high temperature flue gas, reducing clogging and wear of the catalyst and subsequent equipment in the SCR system, and improving The overall denitration efficiency of the SCR system.
  • the high-temperature denitration and dust removal integrated device 100 further includes a reverse purge system, the reverse purge system is disposed in the flue or reactor and faces the first layer 14 side, and the back purge system can be steam or sonic purge
  • the system, backflush system is determined based on the ash content of the flue or reactor and its structure.
  • the angle between the two rectangular plates of each bend member 12 is greater than 15° and less than 180°.
  • one or more of the bodies 10 may be arranged in the direction of flow of the flue gas in the flue, depending on the process requirements.
  • each of the layers 10 generally includes four body units 11 interconnected and juxtaposed, the number of which is determined by the width of the flue or reactor.
  • the ash bucket 20 is formed in a tapered shape.
  • the high-temperature denitration and dust removal integrated device 100 removes dust in a flue or reactor by disposing the body 10 having a V-shaped plate-shaped body unit in a flue or a reactor.
  • a dust hopper 20 for collecting dust is disposed under the body 10, and the operating cost is reduced by optimizing and improving the existing device.
  • the high-temperature off-load and dust-removing integrated device 100 has small pressure loss, small influence on the flow of the flue gas, and can be at a high temperature. Effectively remove nitrogen oxides from fly ash and flue gas, which can reduce the wear and blockage of fly ash in the SCR system on the catalyst and subsequent equipment, and improve the overall denitration efficiency of the SCR denitration system.

Abstract

Un appareil de dénitration et de dénitration intégré à haute température (100), comprenant : un corps (10), qui comprend au moins une unité de corps (11), l'unité de corps (11) étant une structure de type plaque en forme de V, et le corps (10) étant disposé dans un conduit de combustion ou un réacteur pour effectuer une dénitration et une élimination de poussière sur les gaz de combustion s'écoulant à travers; et une trémie à cendres (20), qui est disposée à l'extérieur du conduit de combustion ou du réacteur et au-dessous du corps (10) pour collecter la poussière retirée par le corps (10).
PCT/CN2018/120890 2017-12-25 2018-12-13 Appareil de dénitration et de dénitration intégré à haute température WO2019128727A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201711422428.5A CN109954323B (zh) 2017-12-25 2017-12-25 一种高温脱硝除尘一体化装备
CN201711422428.5 2017-12-25

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WO2019128727A1 true WO2019128727A1 (fr) 2019-07-04

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Cited By (2)

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CN112742231A (zh) * 2019-10-29 2021-05-04 中国石油化工股份有限公司 喷氨静态混合器及除尘方法
CN113908678A (zh) * 2021-12-15 2022-01-11 山东东源新材料科技有限公司 一种水泥窖烟气脱硝装置及其使用方法

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CN114113498B (zh) * 2022-01-25 2022-04-22 光大环保技术装备（常州）有限公司 Scr脱硝系统用流体流速反向扰动净化测试系统及方法

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CN102125797A (zh) * 2011-02-23 2011-07-20 张继兴 一种高效除尘、脱硫、脱氮一体化装置
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Publication number Priority date Publication date Assignee Title
CN112742231A (zh) * 2019-10-29 2021-05-04 中国石油化工股份有限公司 喷氨静态混合器及除尘方法
CN112742231B (zh) * 2019-10-29 2023-04-18 中国石油化工股份有限公司 喷氨静态混合器及除尘方法
CN113908678A (zh) * 2021-12-15 2022-01-11 山东东源新材料科技有限公司 一种水泥窖烟气脱硝装置及其使用方法
CN113908678B (zh) * 2021-12-15 2022-02-25 山东东源新材料科技有限公司 一种水泥窖烟气脱硝装置及其使用方法

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