CN105797582A - Differential ammonia spraying reactor for SCR denitration and ammonia spraying method - Google Patents

Differential ammonia spraying reactor for SCR denitration and ammonia spraying method Download PDF

Info

Publication number
CN105797582A
CN105797582A CN201610284211.1A CN201610284211A CN105797582A CN 105797582 A CN105797582 A CN 105797582A CN 201610284211 A CN201610284211 A CN 201610284211A CN 105797582 A CN105797582 A CN 105797582A
Authority
CN
China
Prior art keywords
ammonia
reactor
reactor body
flue
spray ammonia
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CN201610284211.1A
Other languages
Chinese (zh)
Other versions
CN105797582B (en
Inventor
赵宇明
李春雨
谷小兵
申镇
王长清
李穹
马务
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Datang Environment Industry Group Co Ltd
Original Assignee
Datang Environment Industry Group Co Ltd
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.)
Filing date
Publication date
Application filed by Datang Environment Industry Group Co Ltd filed Critical Datang Environment Industry Group Co Ltd
Priority to CN201610284211.1A priority Critical patent/CN105797582B/en
Publication of CN105797582A publication Critical patent/CN105797582A/en
Application granted granted Critical
Publication of CN105797582B publication Critical patent/CN105797582B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B01D53/88—Handling or mounting catalysts
    • 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
    • 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
    • B01D53/76—Gas phase processes, e.g. by using aerosols
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B01D2255/902—Multilayered catalyst
    • B01D2255/9025—Three layers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (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)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention discloses a differential ammonia spraying reactor for SCR denitration. A third curve channel is arranged above the left side of a reactor body; a transition flue is connected above the right side of the reactor body; a second curve channel is arranged at the connection position of the reactor body and the transition flue; the transition flue comprises a vertical flue and a horizontal flue; a first curve channel is arranged at the joint; an ash falling position is arranged at the first curve channel; a smoke inlet is arranged at an inlet of the horizontal flue; an ammonia spraying grid is arranged inside the horizontal flue; a smoke outlet is arranged under the reactor body; a plurality of catalyst plates are arranged in the reactor body; arc-shaped flow guide plates are arranged in the three curve channels; the ammonia spraying grid comprises a plurality of spraying pipes which are longitudinally arrayed in a single layer; a plurality of nozzles are arranged on each of the spraying pipes. The invention also provides an ammonia spraying method. The nozzles are divided into an edge area and a center area and adopt different jet velocities. The ammonia spraying speed in the center area is lower than the ammonia spraying speed in the edge area. The differential ammonia spraying reactor for SCR denitration has the beneficial effects that the mixing degree of the smoke and the reducing agent (ammonia gas) can be effectively improved and the ammonia escape is prevented.

Description

The differentiation spray ammonia reactor of a kind of SCR denitration and spray ammonia method
Technical field
The present invention relates to the out of stock technical field of SCR, the differentiation in particular to a kind of SCR denitration sprays ammonia reactor and spray ammonia method.
Background technology
The performance indications of SCR (SCR) system mainly include out of stock efficiency and NH3Escapement ratio.There is the insufficient phenomenon causing the escaping of ammonia of reaction in the SCR flue gas denitration reactor of majority power plant of China, the ammonia-spraying grid ammonia spraying amount mainly due to SCR flue gas denitration reactor porch is not enough, it is difficult to ensure the Homogeneous phase mixing of flue gas and ammonia.Meanwhile, the catalyst plate lazy weight of SCR denitration device, it is impossible to make the nitrogen oxides in flue gas and ammonia fully react, it is impossible to reach the denitration efficiency of requirement.Therefore, the uniformity improving the distribution of Catalytic Layer inlet flue gas and ammonia density distribution is to improve the key of SCR system performance.
Summary of the invention
For solving the problems referred to above, it is an object of the invention to provide the differentiation of a kind of SCR denitration spray ammonia reactor and spray ammonia method, be effectively improved the ammonia nitrogen mixing ratio in first floor catalyst inlet interface, promote system denitration performance, reduce the escaping of ammonia, effectively suppress ABS to generate.
The invention provides the differentiation of a kind of SCR denitration spray ammonia reactor, including reactor body, the left side of described reactor body is arranged over the 3rd bend, the right side of described reactor body is connected above transition flue duct, the junction of described reactor body and described transition flue duct is the second bend, described transition flue duct includes vertical gas pass and horizontal flue, the junction of described vertical gas pass and described horizontal flue is the first bend, described first corner is provided with ash place, the porch of described horizontal flue is smoke inlet, it is provided with ammonia-spraying grid in described horizontal flue, described reactor body be connected with exhanst gas outlet, multiple catalyst plates it is provided with in described reactor body, described first bend, it is equipped with arc deflector in described second bend and described 3rd bend；
Wherein, described ammonia-spraying grid includes the many jet pipes that monolayer is arranged, many described jet pipe longitudinal arrangements, and every described jet pipe arranges multiple nozzle.
Further improving as the present invention, described jet pipe has 20, and arranges 15, nozzle on every jet pipe, and nozzle adds up to 300.
Further improve as the present invention, in described reactor body, be provided with three catalyst plates.
Further improving as the present invention, described catalyst plates is board-like catalyst.
Present invention also offers a kind of spray ammonia method of SCR denitration reactor utilized described in claim 1, the nozzle of described ammonia-spraying grid is divided into two regions, all nozzles enclose as marginal area I near the outermost one of described horizontal flue wall, region II centered by remaining region, the nozzle in described marginal area I and the nozzle in described central area II are respectively adopted different jet velocities.
Further improve as the present invention, adjust the valve opening of all nozzles, improve the jet velocity of described marginal area I, and reduce the jet velocity of described central area II.
Further improve as the present invention, make the jet velocity of the described marginal area I jet velocity more than described central area II.
Further improving as the present invention, the spray ammonia speed of described marginal area I is 15.2m/s, and the spray ammonia speed of described central area II is 13.7m/s.
The invention have the benefit that
When ammonia-spraying grid top nozzle quantity is fixing, nozzle being divided into marginal area and Liang Ge region, central area, and is respectively adopted different jet velocities, the spray ammonia speed of central area is lower than marginal area, the degree of mixing of flue gas and reducing agent ammonia can be effectively improved, it is to avoid the escaping of ammonia.
Accompanying drawing explanation
Fig. 1 is the structural representation of the differentiation spray ammonia reactor of a kind of SCR denitration described in the embodiment of the present invention；
Fig. 2 is the plane graph of catalyst plates in Fig. 1；
Fig. 3 is the plane graph of ammonia-spraying grid in Fig. 1.
In figure,
1, reactor body；2, smoke inlet；3, exhanst gas outlet；4, ammonia-spraying grid；5, transition flue duct；6, fall ash place；7, catalyst plates；8, vertical gas pass；9, horizontal flue；10, the first bend；11, the second bend；12, the 3rd bend.
Detailed description of the invention
Below by specific embodiment and in conjunction with accompanying drawing, the present invention is described in further detail.
nullEmbodiment 1，As shown in Figure 1，A kind of differentiation spray ammonia reactor of the SCR denitration of the embodiment of the present invention，Including reactor body 1，The left side of reactor body 1 is arranged over the 3rd bend 12，The right side of reactor body 1 is connected above transition flue duct 5，The junction of reactor body 1 and transition flue duct 5 is the second bend 11，Transition flue duct 5 includes vertical gas pass 8 and horizontal flue 9，The junction of vertical gas pass 8 and horizontal flue 9 is the first bend 10，First bend 10 place is provided with ash place 6，The porch of horizontal flue 9 is smoke inlet 2，Ammonia-spraying grid 4 it is provided with in horizontal flue 9，Reactor body 1 be connected with exhanst gas outlet 3，Multiple catalyst plates 7 it is provided with in reactor body 1，First bend 10、It is equipped with arc deflector in second bend 11 and the 3rd bend 12；Ammonia-spraying grid 4 includes the many jet pipes that monolayer is arranged, many jet pipe longitudinal arrangements, and every jet pipe arranges multiple nozzle.
Further, jet pipe has 20, and arranges 15, nozzle on every jet pipe, and nozzle adds up to 300.Three catalyst plates 7 it are provided with in reactor body 1.As in figure 2 it is shown, catalyst plates 7 is board-like catalyst.
Embodiment 2, as it is shown on figure 3, present invention also offers a kind of spray ammonia method utilizing above-mentioned differentiation spray ammonia reactor.20 jet pipe longitudinal arrangements, and every jet pipe arranges 15, nozzle, nozzle adds up to 300.When nozzle quantity is fixing, all nozzles of ammonia-spraying grid 4 are divided into two regions, all nozzles enclose as marginal area I near the outermost one of horizontal flue 9 wall, region II centered by remaining region, the nozzle in marginal area I and the nozzle in the II of central area are respectively adopted different jet velocities.
Further, owing to the nozzle number in the II of central area is more than the nozzle number in marginal area I, if adopting same spray ammonia speed, it will cause the NH of marginal area I3Concentration lower than central area II, accordingly, it would be desirable to adjust the valve opening of all nozzles, improve the jet velocity of marginal area I, and reduce the jet velocity of central area II.
Further, in order to ensure the degree of mixing of flue gas and reducing agent ammonia, it is ensured that the jet velocity of the marginal area I jet velocity more than central area II.
Time specifically used, initially set up simulation method and the model of reducing agent ammonia and flue gas flow field and mixed effect in SCR reactor flue；Then, flue straight tube place and corner to model carry out gridding division, and ammonia-spraying grid carries out non-grid division the setting of boundary condition；Finally, the sunykatuib analysis ammonia-spraying grid top nozzle jet velocity impact on reducing agent ammonia on reactor inlet flue Yu flue gas concentration field.Through repeatedly analog approach to spray ammonia speed adjustment, it has been found that along with marginal area I and central area II spray ammonia speed difference increase, marginal area I and the NH in the II of central area3Concentration difference first reduce and increase afterwards.The best spray ammonia speed finally choosing I district is 15.2m/s, and the best spray ammonia speed in IIth district is 13.7m/s.Through flow field simulation, it has been found that the concentration being adjusted rear ammonia entrance catalyst inlet place obtains good improvement, and concentration standard deviation is 4.16%, meets reactor inlet ammonia concentration Spreading requirements in practical engineering application.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.

Claims (8)

  1. null1. the differentiation spray ammonia reactor of a SCR denitration，It is characterized in that，Including reactor body (1)，The left side of described reactor body (1) is arranged over the 3rd bend (12)，The right side of described reactor body (1) is connected above transition flue duct (5)，The junction of described reactor body (1) and described transition flue duct (5) is the second bend (11)，Described transition flue duct (5) includes vertical gas pass (8) and horizontal flue (9)，The junction of described vertical gas pass (8) and described horizontal flue (9) is the first bend (10)，Described first bend (10) place is provided with ash place (6)，The porch of described horizontal flue (9) is smoke inlet (2)，Ammonia-spraying grid (4) it is provided with in described horizontal flue (9)，Described reactor body (1) be connected with exhanst gas outlet (3)，Multiple catalyst plates (7) it is provided with in described reactor body (1)，Described first bend (10)、It is equipped with arc deflector in described second bend (11) and described 3rd bend (12)；
    Wherein, described ammonia-spraying grid (4) includes the many jet pipes that monolayer is arranged, many described jet pipe longitudinal arrangements, and every described jet pipe arranges multiple nozzle.
  2. 2. differentiation according to claim 1 spray ammonia reactor, it is characterised in that described jet pipe has 20, and arranges 15, nozzle on every jet pipe, and nozzle adds up to 300.
  3. 3. differentiation according to claim 1 spray ammonia reactor, it is characterised in that be provided with three catalyst plates (7) in described reactor body (1).
  4. 4. differentiation according to claim 1 spray ammonia reactor, it is characterised in that described catalyst plates (7) is board-like catalyst.
  5. 5. the spray ammonia method of the differentiation spray ammonia reactor that a kind utilizes described in claim 1, it is characterized in that, the nozzle of described ammonia-spraying grid (4) is divided into two regions, all nozzles enclose as marginal area I near the outermost one of described horizontal flue (9) wall, region II centered by remaining region, the nozzle in described marginal area I and the nozzle in described central area II are respectively adopted different jet velocities.
  6. 6. spray ammonia method according to claim 5, it is characterised in that adjust the valve opening of all nozzles, improves the jet velocity of described marginal area I, and reduces the jet velocity of described central area II.
  7. 7. spray ammonia method according to claim 6, it is characterised in that make the jet velocity of the described marginal area I jet velocity more than described central area II.
  8. 8. spray ammonia method according to claim 7, it is characterised in that the spray ammonia speed of described marginal area I is 15.2m/s, the spray ammonia speed of described central area II is 13.7m/s.
CN201610284211.1A 2016-04-29 2016-04-29 A kind of the differentiation spray ammonia reactor and spray ammonia method of SCR denitration Active CN105797582B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610284211.1A CN105797582B (en) 2016-04-29 2016-04-29 A kind of the differentiation spray ammonia reactor and spray ammonia method of SCR denitration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610284211.1A CN105797582B (en) 2016-04-29 2016-04-29 A kind of the differentiation spray ammonia reactor and spray ammonia method of SCR denitration

Publications (2)

Publication Number Publication Date
CN105797582A true CN105797582A (en) 2016-07-27
CN105797582B CN105797582B (en) 2018-07-24

Family

ID=56458077

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610284211.1A Active CN105797582B (en) 2016-04-29 2016-04-29 A kind of the differentiation spray ammonia reactor and spray ammonia method of SCR denitration

Country Status (1)

Country Link
CN (1) CN105797582B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106984191A (en) * 2017-03-29 2017-07-28 华电电力科学研究院 A kind of efficient hybrid system of reducing agent ammonia and its method of work for SCR denitrating flue gas
CN113491933A (en) * 2021-09-10 2021-10-12 鑫领域智能科技(邳州)有限公司 Hot-galvanize pickling is handled with high-efficient acid mist treatment tower
CN113617206A (en) * 2020-05-07 2021-11-09 江苏海默环保科技有限公司 Control method of spray gun, control system of spray gun and incineration system
CN114669145A (en) * 2021-12-31 2022-06-28 云南龙镁环境科技有限公司 Combined device for high-temperature flue gas denitration and use method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201643983U (en) * 2010-02-26 2010-11-24 中国大唐集团科技工程有限公司 Gas injection grill and flue gas denitration device
WO2012170421A1 (en) * 2011-06-05 2012-12-13 Johnson Matthey Public Limited Company Platinum group metal (pgm) catalyst for treating exhaust gas
US20130000743A1 (en) * 2011-06-29 2013-01-03 Ti Group Automotive Systems, L.L.C. Scr fluid distribution and circulation system
KR20130018609A (en) * 2011-08-08 2013-02-25 티아이 그룹 오토모티브 시스템즈 엘엘씨 Fluid distribution system with filtration
CN103927420A (en) * 2014-04-22 2014-07-16 东南大学 Method for optimizing gas-solid two-phase flow field and ammonia spraying of selective catalytic reduction denitration device
CN205586827U (en) * 2016-04-29 2016-09-21 大唐环境产业集团股份有限公司 Ammonia reactor is spouted to differentiation of SCR denitration

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201643983U (en) * 2010-02-26 2010-11-24 中国大唐集团科技工程有限公司 Gas injection grill and flue gas denitration device
WO2012170421A1 (en) * 2011-06-05 2012-12-13 Johnson Matthey Public Limited Company Platinum group metal (pgm) catalyst for treating exhaust gas
US20130000743A1 (en) * 2011-06-29 2013-01-03 Ti Group Automotive Systems, L.L.C. Scr fluid distribution and circulation system
KR20130018609A (en) * 2011-08-08 2013-02-25 티아이 그룹 오토모티브 시스템즈 엘엘씨 Fluid distribution system with filtration
CN103927420A (en) * 2014-04-22 2014-07-16 东南大学 Method for optimizing gas-solid two-phase flow field and ammonia spraying of selective catalytic reduction denitration device
CN205586827U (en) * 2016-04-29 2016-09-21 大唐环境产业集团股份有限公司 Ammonia reactor is spouted to differentiation of SCR denitration

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106984191A (en) * 2017-03-29 2017-07-28 华电电力科学研究院 A kind of efficient hybrid system of reducing agent ammonia and its method of work for SCR denitrating flue gas
CN113617206A (en) * 2020-05-07 2021-11-09 江苏海默环保科技有限公司 Control method of spray gun, control system of spray gun and incineration system
CN113617206B (en) * 2020-05-07 2023-08-22 江苏海默环保科技有限公司 Control method of spray gun, control system of spray gun and incineration system
CN113491933A (en) * 2021-09-10 2021-10-12 鑫领域智能科技(邳州)有限公司 Hot-galvanize pickling is handled with high-efficient acid mist treatment tower
CN114669145A (en) * 2021-12-31 2022-06-28 云南龙镁环境科技有限公司 Combined device for high-temperature flue gas denitration and use method thereof

Also Published As

Publication number Publication date
CN105797582B (en) 2018-07-24

Similar Documents

Publication Publication Date Title
CN105797582A (en) Differential ammonia spraying reactor for SCR denitration and ammonia spraying method
CN202146712U (en) Smoke catalytic reduction denitration device capable of mixing uniformly, equalizing and guiding flow
CN103657411B (en) Rotational flow mixing device for SCR flue gas denitrification system
CN102389727B (en) SCR (Selective Catalytic Reduction) denitration four-corner tangent circle type ammonia-fume gas uniformly-mixing device
CN201394414Y (en) Injection ammonia-spray mixing mechanism of SCR reaction device
CN102814119A (en) Silicon controlled rectifier (SCR) denitration device of waste gas pre-dedusting ammonia spraying disk in power plant
CN201454414U (en) Ammonia injection grille device for flue gas denitration adopting SCR method
CN208244456U (en) A kind of guiding device
CN207980871U (en) Rectangular nozzle formula ammonia-spraying grid suitable for flue gas SCR denitration technique ammonia spraying system
CN203577639U (en) Swirl mixing device for SCR (selective catalytic reduction) flue gas denitrification system
CN107008144B (en) Device for realizing SCR flue gas denitration multistage ammonia spraying and flue gas denitration method
CN208512282U (en) A kind of device for removing sulfur trioxide and NOx in flue gas with integrated spraying system
CN205586827U (en) Ammonia reactor is spouted to differentiation of SCR denitration
CN203725030U (en) SCR (Selective Catalytic Reduction) denitration system and ammonia spraying device thereof
CN101879401B (en) Reducing agent injection mechanism suitable for SCR reactor
CN202762312U (en) Waste gas pre-dedusting ammonia spraying disc semiconductor control rectifier (SCR) denitration device of power plant
CN109821379B (en) Ammonia spraying device for improving ammonia distribution uniformity
CN101905120A (en) Ammonia spray nozzle mixer for SCR denitrating device
CN210356706U (en) Differential rectification system of flue gas suitable for SCR deNOx systems
CN205627635U (en) A ammonia reactor is spouted to two rooms two -stage for SCR denitration
CN204602015U (en) A kind of device utilizing orifice plate and vortex board Homogeneous phase mixing flue gas and ammonia
CN106731827A (en) A kind of AIG upstreams flue gas is on a large scale from mixing arrangement
CN206587601U (en) A kind of AIG upstreams flue gas is a wide range of from mixing arrangement
CN102580528B (en) Blast cap type ammonia injection and mixing device for selective catalytic reduction denitration
CN208642322U (en) A kind of integration spraying system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant