CN206008457U - Before and after a kind of joint removing SCR denitration device in flue gas SO3 and flue dust device - Google Patents
Before and after a kind of joint removing SCR denitration device in flue gas SO3 and flue dust device Download PDFInfo
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- CN206008457U CN206008457U CN201620932568.1U CN201620932568U CN206008457U CN 206008457 U CN206008457 U CN 206008457U CN 201620932568 U CN201620932568 U CN 201620932568U CN 206008457 U CN206008457 U CN 206008457U
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Abstract
The utility model is related to before and after a kind of joint removing SCR denitration device SO in flue gas3And the device of flue dust, economizer and its ash bucket, absorbent storage, first order absorption agent spraying system, absorbent induction system, some cyclone dust collectors, ammonia-spraying grid, SCR denitration reactor, two grades of sorbent injection systems, the economizer and its ash bucket, first order absorption agent spraying system, some cyclone dust collectors, SCR denitration reactor, two grades of sorbent injection systems pass sequentially through flue and are attached, equipped with trona as absorbent in the absorbent storage, sorbent injection system is arranged in economizer hopper exhanst gas outlet and SCR denitration reactor exit, cyclone dust collectors are arranged on the flue of SCR denitration reactor inlet.Needed for the utility model, general consumption raw material is rich in mineral resources, cheap, cyclone dust collectors technology maturation, equipment reliability, less to the change of unit existing equipment, operates without the need for special messenger, and equipment and operation expense are low.
Description
Technical field
The utility model is related to before and after a kind of joint removing SCR denitration device SO in flue gas3And the device of flue dust, belong to ring
Protect apparatus field.
Background technology
On 2 29th, 2016, State Statistics Bureau issued《National economy and social development statistical communique in 2015》.Publication number
According to display, 2015, national raw coal output completed 37.5 hundred million tons, and export of coal amount completes 5,330,000 tons, and export amount of money is 3,100,000,000
Unit；Coal import volume completes 204,060,000 tons.And over nearly 6 years, coal production maintains more than 3,400,000,000 tons all the time, coal is used as me
The supply pattern of state's main energy sources will not change within following some time.But producing during coal burning substantial amounts of has
Evil material, particularly in thermal power generation industry, contains substantial amounts of SO in the flue gas after coal burning3And flue dust.
SO3Main harm substantially have following some：1 and denitrification reducing agent generate ammonium hydrogen sulfate cause catalyst inactivate, compel
Make the out of stock devices of unit running on the lower load SCR out of service；2nd, in ammonium hydrogen sulfate absorption flue gas, dust obstruction and corrosion air are pre-
Hot device heat exchange element；3rd, low-temperature zone forms H2SO4Corrosion relevant device；4th, smoke evacuation " Lan Yu " phenomenon, increase smoke evacuation opacity
Deng.
When SCR denitration reactor is flowed through, soot dust granule can produce abrasion to high cloud of dust gas to denitrating catalyst, and appropriateness is worn and torn
Be conducive to the renewal of catalyst surface active layer；Excessive wear can make the too fast loss of catalyst surface active principle, reduce and urge
The life-span of agent；Heavy wear can make catalyst local thinning, cause the fracture of catalyst, or even obstruction catalyst channels or damage
Evil catalyst upstream device.
In sum, the SO in flue gas3And flue dust be restrict unit and environmental protection equipment economy, Effec-tive Function important because
Element, especially puts into operation on SCR denitration device full load and the service life impact of denitrating catalyst is huge, causes environmental protection pressure to increase
Greatly, operating cost increases.
Research work proposed SO in numerous removing flue gases3Or the method for flue dust, SO is removed before traditional denitration3Method
There are some shortcoming and defect, its key constraints has：
(1) SO is not taken before SCR denitration device3Control technology, causes unit middle-low load working condition SCR denitration device to exit
Operation.
(2) alkaline absorbent, the SO not reacted completely are sprayed before SCR denitration device3Absorbent may reduce catalyst
Chemism even inactivate catalyst.
(3) SO in flue gas is removed before SCR denitration device3Technology, is limited in that and cannot remove because of SCR denitration oxygen
The SO3 for changing and producing causes obstruction and the corrosion of air preheater, increases operation and maintenance cost.
(4) flue gas of high dustiness during catalyst is flowed through causes to wear and tear to catalyst, and impact equipment is normally transported
Row, increase operating cost.
(5) limited by conditions such as scene and absorbing liquid concentration, absorbing liquid using trona lysate as the method for absorbent
Supply pipe is easily blocked, and system complex.
Utility model content
For problem above, SO in flue gas before and after a kind of joint removing SCR denitration device of the utility model offer3And flue dust
Device, including economizer and its ash bucket, absorbent storage, first order absorption agent spraying system, absorbent induction system, whirlwind
Deduster gas approach, some cyclone dust collectors, cyclone entrance flue, ammonia-spraying grid, SCR denitration reactor, two grades
Sorbent injection system, the economizer and its ash bucket, first order absorption agent spraying system, some cyclone dust collectors, SCR denitration are anti-
Answer device, two grades of sorbent injection systems to pass sequentially through flue and be attached, trona conduct is housed in the absorbent storage
Absorbent, the sorbent injection system are arranged in economizer hopper exhanst gas outlet and SCR denitration reactor exit, the rotation
Wind deduster is arranged in sorbent injection system and inhales with, on the flue of SCR denitration reactor inlet, being easy to remove in flue gas
Receive agent and part flue dust.By the use of trona resource rich in mineral resources as SO3Absorbent, can avoid unreacted SO3Absorbent
Cause denitrating catalyst poisoning and deactivation, it is to avoid SO3The ammonium hydrogen sulfate for generating is reacted with denitrification reducing agent, causes denitrating catalyst to lose
Living；Avoid because of SO3And the ammonium hydrogen sulfate for generating denitrification apparatus forced outage when causing performing low-load running of machine set；Avoid big particle diameter cigarette
Excessive wear of the dirt to denitrating catalyst；Avoid the SO produced because SCR denitration is aoxidized3Cause the stifled of air preheater
Plug and corrosion, it is ensured that the equipment economy such as denitrating catalyst and air preheater, Effec-tive Function.In addition, the utility model is also
There are following characteristics：One is mainly to have carried out the transformation of flue on the basis of existing equipment, it is ensured that SO3Have with absorbent enough
In the reaction time, enhance SO3Assimilation effect, while improvement cost can also be reduced；Two is that ammonia-spraying grid is arranged in whirlwind and removes
Dirt device exhaust pass position, ensure that amino reductive is sufficiently mixed with flue gas, it is to avoid cause the because flue cross section changes
The phenomenon that reductant concentration deviation is larger in one layer of catalyst inlet flue gas occurs；Three is that two-stage injection absorbent fully can take off
Except burning and catalyst aoxidize the SO for producing3, it is to avoid the impact to denitrification apparatus and air preheater.In economizer hopper
Smoke outlet applied compression air sprays into absorbent in flue, used as trona and the coal combustion process in flue gas of absorbent
The SO of generation3Reaction, generates stable solid product with the downward downstream of flue gas.As the natural of absorbent in the utility model
The physical characteristic of alkali is determined by flying dust characteristic on the premise of chemism is ensured, in should ensure which with flue gas in concrete operations
The larger flue dust of particle diameter is together captured by cyclone dust collectors.The absorbent holder be arranged in sorbent injection system with layer or
Close height, can so reduce transmission range, it is to avoid line clogging in transmitting procedure.
Preferably can be with arrangement deflector at the inlet flue duct of cyclone dust collectors and/or at exhaust pass.
By arranging deflector, the flue gas flow field of entrance cyclone dust collectors and air preheater can be made uniform.
Preferably can be with arrangement deflector at the inlet flue duct of cyclone dust collectors and/or at exhaust pass.
By arranging deflector, the flue gas flow field of entrance cyclone dust collectors and air preheater can be made uniform.
Wind speed controllable register door is preferably there also is provided at the gas approach of cyclone dust collectors, in order to ensure that whirlwind is removed
Dirt device inlet flue gas flow field meets the design requirement that equipment full load puts into operation.
Preferably, wear strip is set in the sorbent injection system.In practical operation, sorbent injection system is adjusted
System makes which spray with flue gas downstream, is provided with the wear strip for having flow-disturbing effect concurrently in windward side, and flue gas is formed after wear strip
Turbulent flow is conducive to flue gas to be sufficiently mixed with absorbent, can further improve SO3Absorption efficiency.
Further, cyclone dust collectors quantity is 2 to 4, according to unit size and field condition, a SCR denitration reaction
Device exhaust pass arranges 2-4 cyclone dust collectors, it is ensured that by SO3Absorbent and most of flue dust removing, and increase resistance
Plus in the reasonable scope.
Further, SO in flue gas before and after joint removing SCR denitration device3And the device of flue dust can also be included for general
The flue dust of removing is delivered to the storehouse pump and pneumatic ash conveying pipe in grey storehouse in factory, and the storehouse pump and pneumatic ash conveying pipe are connected to whirlwind
On deduster, can be delivered in factory grey storehouse, be easy to unite after cooling process being carried out to the high temperature ash that cyclone dust collectors are removed in time
One is processed.
The utility model compared with prior art, with advantages below and effect：The utility model systematization removing SCR takes off
SO before and after nitre device in flue gas3And most of flue dust, required general consumption raw material is rich in mineral resources, cheap, cyclone dust removal
Device technology maturation, equipment reliability, less to the change of unit existing equipment, operate without the need for special messenger, possess production domesticization condition completely, if
Standby and operation expense is low.
The utility model realized by carrying out simply transforming to denitrification apparatus gas approach, and economizer and its ash bucket go out
Flue gas and SO at mouthful3Absorbent is sufficiently mixed, and removes the SO in flue gas3, then enter in cyclone dust collector removing flue gas
Flue dust and SO3Absorbent granules, SO in flue gas before and after realization joint removing SCR denitration device3And flue dust, it is to avoid unreacted SO3
Absorbent causes denitrating catalyst poisoning and deactivation, it is to avoid SO3The ammonium hydrogen sulfate for generating is reacted with denitrification reducing agent, causes denitration to be urged
Agent is inactivated；Avoid because of SO3And the ammonium hydrogen sulfate for generating denitrification apparatus forced outage when causing performing low-load running of machine set；Avoid because
The SO that SCR denitration is aoxidized and produced3Cause the blocking and corrosion of air preheater, it is to avoid flue dust is to denitrating catalyst
Excessive wear is so as to ensureing the equipment economy such as denitrating catalyst and air preheater, Effec-tive Function.
Description of the drawings
In order to be illustrated more clearly that the utility model, embodiment will be described below needed for accompanying drawing to be used make simple
Introduce on ground.It should be evident that drawings in the following description be only embodiment of the present utility model description, for this area general
For logical technical staff, without having to pay creative labor, can with according to technical scheme carry out simple deformation or
Person's title changes, or takes customary means, it is also possible to realize goal of the invention.
Fig. 1 is SO in flue gas before and after joint removing SCR denitration device in the utility model embodiment3And the device of flue dust
Structural representation.
Label declaration：1- economizers and its ash bucket, 2- absorbent storages, 3- first order absorption agent spraying systems, 4- absorb
Agent induction system, 5- cyclone dust collectors gas approach, 6- cyclone dust collectors, 7- storehouses pump and pneumatic ash conveying pipe, 8- cyclone dust removals
Device exhaust pass, 9- ammonia-spraying grids, 10- Benitration reactors, bis- grades of sorbent injection systems of 11-.
Specific embodiment
The utility model is described in further detail with reference to embodiment, following examples are to the utility model
Explanation and the utility model is not limited to following examples.
As shown in figure 1, SO in flue gas before and after joint removing SCR denitration device in the present embodiment3And the device of flue dust includes
Economizer and its ash bucket 1, absorbent storage 2, first order absorption agent spraying system 3, absorbent induction system 4, cyclone dust collectors
Gas approach 5, cyclone dust collectors 6, storehouse pump and pneumatic ash conveying pipe 7, cyclone entrance flue 8, ammonia-spraying grid 9, denitration
10, two grades of sorbent injection systems 11 of reactor.
Sorbent injection system 3 is arranged in 1 exit position of economizer hopper flue gas, SO is sprayed into3Absorbent trona, absorbs
Agent spraying system windward side wear strip has spoiler function concurrently and ensures that absorbent can be sufficiently mixed with flue gas, periodically to injection system
In system, each jet pipe carries out impulse blowing.
According to SO in flue gas3Concentration and trona in active ingredient content and the parameter determination such as operating condition of boiler
Absorbent supply, wherein absorbent active ingredient and SO in flue gas3The ratio of molar concentration be about 3:1, it is ensured that by flue gas
Most SO3Removing.
SO in flue gas3Cyclone dust collectors are entered with absorbent after fully reacting, and the flue dust of cyclone dust collectors removing passes through bottom
The storehouse pump in portion and air-transport system cooling, and grey storehouse is transported in factory.
Cyclone dust collectors inlet flue duct arranges deflector and baffle door, and control enters the flue gas flow field of cyclone dust collectors and meets
Design requirement, realizes that the full load of equipment puts into operation；Cyclone entrance flue arranges deflector.Removing SO3And most of cigarette
The flue gas of dirt enters SCR denitration reactor.
Under the catalytic action of SCR denitration, part SO in flue gas2It is oxidized to SO3, this part SO3With flue gas stream
The absorbent hybrid reaction provided with two grades of sorbent injection systems after going out SCR denitration reactor, by newly-generated SO3Removing,
Avoid causing the obstruction of air preheater and corrosion because of SO3.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its part, named title
Etc. can be with difference.The equivalent or simple change done by all constructions according to described in the utility model inventional idea, feature and principle,
It is included in the protection domain of the utility model patent.The utility model person of ordinary skill in the field can be to described
Specific embodiment make various modification supplement or using similar mode replacement, without departing from of the present utility model
Structure surmounts scope defined in the claims, all should belong to protection domain of the present utility model.
Claims (7)
1. SO in flue gas before and after a kind of joint removing SCR denitration device3And the device of flue dust, including economizer and its ash bucket, absorption
Agent storage, first order absorption agent spraying system, absorbent induction system, cyclone dust collectors gas approach, some cyclone dust collectors,
Cyclone entrance flue, ammonia-spraying grid, SCR denitration reactor, the economizer and its ash bucket, first order absorption agent injection system
System, some cyclone dust collectors, Benitration reactor, pass sequentially through flue and are attached, equipped with absorption in the absorbent storage
Agent, the sorbent injection system are arranged in economizer hopper exhanst gas outlet and SCR denitration reactor exit, and the whirlwind is removed
Dirt device be arranged in sorbent injection system with the flue of SCR denitration reactor inlet, the absorbent holder arrangement
In sorbent injection system with layer or close height, the ammonia-spraying grid is arranged on cyclone entrance flue, its feature
It is：Also include that two grades of sorbent injection systems, two grades of sorbent injection systems are installed near SCR denitration reactor
In exhaust pass.
2. SO in flue gas before and after joint removing SCR denitration device as claimed in claim 13And the device of flue dust, its feature exists
In：Deflector is disposed with the flue of the cyclone dust collectors import and/or outlet.
3. SO in flue gas before and after joint removing SCR denitration device as claimed in claim 1 or 23And the device of flue dust, its feature
It is：Wind speed controllable register door is also arranged at the gas approach of the cyclone dust collectors.
4. SO in flue gas before and after joint removing SCR denitration device as claimed in claim 33And the device of flue dust, its feature exists
In：The sorbent injection system is provided with wear strip.
5. SO in flue gas before and after joint removing SCR denitration device as claimed in claim 33And the device of flue dust, its feature exists
In：Described cyclone dust collectors quantity is 2 to 4.
6. SO in flue gas before and after joint removing SCR denitration device as claimed in claim 33And the device of flue dust, its feature exists
In：Also include for the flue dust of removing to be delivered in factory the storehouse pump and pneumatic ash conveying pipe, the storehouse pump and pneumatic transporting in grey storehouse
Grey pipeline is connected to cyclone dust collectors bottom.
7. SO in flue gas before and after joint removing SCR denitration device as claimed in claim 33And the device of flue dust, its feature exists
In：The absorbent active ingredient and SO in flue gas3Molar concentration ratio be 3:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620932568.1U CN206008457U (en) | 2016-08-23 | 2016-08-23 | Before and after a kind of joint removing SCR denitration device in flue gas SO3 and flue dust device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620932568.1U CN206008457U (en) | 2016-08-23 | 2016-08-23 | Before and after a kind of joint removing SCR denitration device in flue gas SO3 and flue dust device |
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| CN206008457U true CN206008457U (en) | 2017-03-15 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106110873A (en) * | 2016-08-23 | 2016-11-16 | 华电电力科学研究院 | Combine before and after removing SCR denitration device SO in flue gas3and the device of flue dust |
| CN107281824A (en) * | 2017-08-01 | 2017-10-24 | 陕西未来能源化工有限公司 | A kind of scroll casing type dust arrester being used for before SCR denitration and dust removal method |
| CN110779035A (en) * | 2019-11-01 | 2020-02-11 | 宁波伊布科技有限公司 | Flue gas cyclone dust removal and cooling tower integrated treatment equipment and process thereof |
| CN112221332A (en) * | 2020-08-14 | 2021-01-15 | 华电电力科学研究院有限公司 | Device and method for preventing blockage corrosion problem of low-temperature economizer |
-
2016
- 2016-08-23 CN CN201620932568.1U patent/CN206008457U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106110873A (en) * | 2016-08-23 | 2016-11-16 | 华电电力科学研究院 | Combine before and after removing SCR denitration device SO in flue gas3and the device of flue dust |
| CN107281824A (en) * | 2017-08-01 | 2017-10-24 | 陕西未来能源化工有限公司 | A kind of scroll casing type dust arrester being used for before SCR denitration and dust removal method |
| CN110779035A (en) * | 2019-11-01 | 2020-02-11 | 宁波伊布科技有限公司 | Flue gas cyclone dust removal and cooling tower integrated treatment equipment and process thereof |
| CN112221332A (en) * | 2020-08-14 | 2021-01-15 | 华电电力科学研究院有限公司 | Device and method for preventing blockage corrosion problem of low-temperature economizer |
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