CN206008467U - A kind of selective catalytic reduction low-temperature denitration tower - Google Patents
A kind of selective catalytic reduction low-temperature denitration tower Download PDFInfo
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- CN206008467U CN206008467U CN201620866223.0U CN201620866223U CN206008467U CN 206008467 U CN206008467 U CN 206008467U CN 201620866223 U CN201620866223 U CN 201620866223U CN 206008467 U CN206008467 U CN 206008467U
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- conversion zone
- tower
- distribution plate
- air distribution
- temperature denitration
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
This utility model is related to environmental protection waste gas treatment equipment, specifically a kind of selective catalytic reduction low-temperature denitration tower, there is pylon, at least two-layer conversion zone is installed on pylon, be provided with above top layer conversion zone into petticoat pipe and smoke-intake pipe, petticoat pipe and pipe are housed out in the lower section of bottom conversion zone, and soot blower are equipped with the tower pot sidewall of each conversion zone, it is furnished with blast pipe, it is characterized in that：The cellular low-temperature denitration catalyst of integral extruding type is placed with the tower tank of each conversion zone, air distribution plate A is installed at the top of top layer conversion zone tower tank, air distribution plate B is installed in the bottom of all conversion zone tower tanks for not including bottom conversion zone；This utility model preferably solves the problems, such as that low-temperature denitration is difficult, energy-saving, is widely used in the Industrial Boilers such as coal-fired power plant, chemical industry, iron and steel glass, the process of kiln tail gas.
Description
Technical field
This utility model is related to environmental protection waste gas treatment equipment, specifically a kind of selective catalytic reduction low-temperature denitration tower.
Background technology
Based on the hazardness of oxides of nitrogen gas, the control discharge to nitrogen oxides masonry in industrial waste gas, is national warp
Ji sustainable development and the objective requirement of environmental conservation.Also, the development of denitration industry has obtained national relevant policies regulation
Support energetically, the pollutant emission standard of various industries is further received sternly, for reaching increasingly to the emission limit of nitrogen oxides
Strict discharge standard, is particularly the minimum discharge standard of some key areas, it is necessary to which waste gas is effectively treated.
Although in the Processing tecchnics to nitrogen oxides harmful gass, method is a lot, SCR
（Selective Catalytic Reduction, SCR）After method is become with its high efficiency, economy and technology maturation
Process the first-selected method of denitration, at present coal fired plant, chemical industry, iron and steel, etc. industry, obtain universal promotion and application.SCR device
The high-temperature high dust section being typically located between boiler economizer and air preheater, operating temperature are interval at 350-420 DEG C, here
Temperature range is operated, and can avoid substantially SO in flue gas2Catalyst is poisoned.Flue gas through SCR device process after, nitrogen oxidation
Thing concentration can be reduced to less than 300mg/m3Or lower≤200mg/m3Below.
Although the denitration technology the most advanced that SCR denitration technology is current international and national generally to be adopted.But, in steel
In many kilns such as ferrum, chemical industry, glass, exhaust gas temperature is all relatively low（200-300℃）, and in tail gas, contain certain density SO2
And vapor, during low-temperature denitration, SO2And H2O is broadly divided in terms of two to the poisoning effect of catalyst：It is SO first2、
H2O and NH3Ammonium sulfate and ammonium hydrogen sulfate etc., the SO in flue gas is generated in the presence of catalyst2Meeting quilt in the presence of catalyst
It is oxidized to SO3, this reaction is totally unfavorable for SCR denitration reaction, because SO3Can be with the H in flue gas2O and
NH3Reaction, generates (NH4)2SO4(NH4)HSO4（Reaction equation is as follows）：
SO2+ O2→SO3
SO3+ NH3+ H2O →(NH4)HSO4
The active sites in the duct and covering catalyst surface of these ammonium sulfate salts meeting blocking catalysts, affect reactant to exist
Diffusion and absorption in catalyst, so that catalyst activity reduces.On the other hand, SO2Directly act on active center, make work
Property central metal atom sulphation and lose catalysis activity.Here it is the limitation of SCR method denitrations.
The country does not also have low temperature SCR denitration technology and the product of maturation at present.And many kiln exhaust gas temperatures of China are 250
DEG C or so or following, this causes the application in these areas of existing SCR denitration technology to face bigger challenge.Therefore one is studied
The device for planting adaptation low-temperature denitration has become one of current very urgent problem.
Content of the invention
The purpose of this utility model seeks to solve the problems, such as that low-temperature denitration is difficult, there is provided a kind of selective catalytic reduction
Low-temperature denitration tower.
Concrete scheme of the present utility model is：A kind of selective catalytic reduction low-temperature denitration tower, with pylon, on pylon
At least two-layer conversion zone is installed, is provided with above top layer conversion zone into petticoat pipe and smoke-intake pipe, in the lower section of bottom conversion zone
Petticoat pipe and pipe are housed out, soot blower are equipped with the tower pot sidewall of each conversion zone, are furnished with blast pipe, it is characterized in that：
The cellular low-temperature denitration catalyst of integral extruding type is placed with the tower tank of each conversion zone, on the top of top layer conversion zone tower tank
Portion is provided with air distribution plate A, is provided with air distribution plate B, air distribution plate A in the bottom of all conversion zone tower tanks for not including bottom conversion zone
Guide functions are played with B, and slows down flue gas wind speed, reduce the direct injection to catalyst, extend the response time, improve reaction effect
Really.
In this utility model, air distribution plate A is triangular structure, flue gas is imported in the first conversion zone from the left and right sides is oblique.
In this utility model, air distribution plate B is made up of the two groups of oblique deflectors in left and right, and two groups of left and right deflector is in outer " eight "
Or interior " eight " shape arrangement.
Air distribution plate B in this utility model in two neighboring conversion zone, its two groups of oblique deflector in left and right for outer " eight " with
Interior " eight " staggered designs, i.e. in outer " eight " structure, then the air distribution plate in the second conversion zone is in interior for air distribution plate B in the first conversion zone
" eight " structure, vice versa.
The integral extruding type honeycomb that produced by Dalian Chemiclophysics Inst., Chinese Academy of Sciences of prioritizing selection in this utility model
Shape low-temperature denitration catalyst, and by setting up air distribution plate, slow down flue gas wind speed, increased by the effective area of catalyst, subtracted
The little direct injection to catalyst, increases service life and the response time of catalyst, so that low-temperature denitration problem is had
Effect is solved.
This utility model design is ingenious, adapts to process less than 250 DEG C of low-temperature flue gas, and the tail gas after process is fully achieved
Discharging standards.
Description of the drawings
Fig. 1 is general structure schematic diagram of the present utility model；
Fig. 2 is the A-A views of Fig. 1；
Fig. 3 is the B-B views of Fig. 1.
In figure：1- smoke-intake pipes, 2- enter petticoat pipe, 3- pylons, 4- air distribution plate A, the first conversion zones of 5-, 6- catalyst, 7- second
Conversion zone, 8- blast pipes, the 3rd conversion zones of 9-, 10- go out petticoat pipe, 11- pipes, 12- soot blowers, 13- air distribution plate B.
Specific embodiment
Referring to Fig. 1,2,3, this utility model has pylon 3, is provided with three-layer reaction layer 5,7,9 on pylon 3, anti-first
Answer the top of layer 5 to be provided with into petticoat pipe 2 and smoke-intake pipe 1, petticoat pipe 10 and pipe 11 are housed out in the lower section of the 3rd conversion zone 9, its
It is characterized in that：It (is big by the Chinese Academy of Sciences to be placed with the cellular low-temperature denitration catalyst 6 of integral extruding type in the tower tank of each conversion zone
The invention production of fluidization physics Institute), air distribution plate A4 is installed at the top of the tower tank of the first conversion zone 5, first, second
The bottom of the tower tank of conversion zone 5 and 7 is mounted on air distribution plate B13, and air distribution plate A4 and B13 play guide functions, and make flue gas wind speed
Slow down, reduce the direct injection to catalyst 6, extend the response time, improve reaction effect；And the tower tank in each conversion zone
Soot blower 12 being equipped with the wall of side, being furnished with blast pipe 8, the blast pipe 8 is to introduce from pipe 11 and going out petticoat pipe 10 and each
Each soot blower 12 is also turned on after coiling heating in layer conversion zone（Can also be and introduce from smoke-intake pipe 1 and entering petticoat pipe 2 and each layer
Each soot blower 12 is also turned on after coiling heating in conversion zone）, blast pipe of the present utility model can with external install additional thermal source dress
Put, i.e., compared with technology.
In the present embodiment, preferred air distribution plate A4 is triangular structure, makes flue gas import the first reaction from the left and right sides is oblique
In layer 5, eddy flow or disturbed flow type structure can also be adopted certainly.
In the present embodiment, preferred air distribution plate B13 is made up of the two groups of oblique deflectors in left and right, and two groups of left and right deflector is to be in
" eight " or interior " eight " shape are arranged outward.
Air distribution plate B13 in the present embodiment in preferably two neighboring conversion zone, its two groups of oblique deflector in left and right is outer
" eight " are in outer " eight " structure with the air distribution plate B13 in interior " eight " staggered designs, i.e. the first conversion zone 5, then in the second conversion zone 7
Air distribution plate is in interior " eight " structure, and vice versa；Air distribution plate B13 can also adopt the turbulence structure of other forms.
This utility model can be devised by two-layer conversion zone according to said structure principle according to treatment quantity and requirement
Or the organization plan of more conversion zones.
Claims (4)
1. a kind of selective catalytic reduction low-temperature denitration tower, with pylon, is provided with least two-layer conversion zone on pylon, on top
It is provided with into petticoat pipe and smoke-intake pipe above layer conversion zone, petticoat pipe and pipe is housed out in the lower section of bottom conversion zone, and
Soot blower is equipped with the tower pot sidewall of each conversion zone, is furnished with blast pipe, be it is characterized in that：Put in the tower tank of each conversion zone
The cellular low-temperature denitration catalyst of integral extruding type is equipped with, air distribution plate A is installed at the top of top layer conversion zone tower tank, is not being wrapped
The bottom for including all conversion zone tower tanks of bottom conversion zone is provided with air distribution plate B, and air distribution plate A and B play guide functions, and make flue gas
Wind speed slows down, and reduces the direct injection to catalyst, extends the response time, improves reaction effect.
2. a kind of selective catalytic reduction low-temperature denitration tower according to claim 1, is characterized in that：The air distribution plate A
For triangular structure, flue gas is made to import in the first conversion zone from the left and right sides is oblique.
3., according to a kind of selective catalytic reduction low-temperature denitration tower of claim 1 or 2, it is characterized in that：The air distribution plate B by
The oblique deflector composition in two groups of left and right, two groups of left and right deflector is in outer " eight " or interior " eight " shape arrangement.
4. a kind of selective catalytic reduction low-temperature denitration tower according to claim 3, is characterized in that：Two neighboring reaction
Air distribution plate B on layer, its oblique deflector in two groups of left and right are outer " eight " and interior " eight " staggered designs, i.e. cloth in the first conversion zone
Aerofoil B is in interior " eight " structure in outer " eight " structure, the then air distribution plate in the second conversion zone, and vice versa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620866223.0U CN206008467U (en) | 2016-08-11 | 2016-08-11 | A kind of selective catalytic reduction low-temperature denitration tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620866223.0U CN206008467U (en) | 2016-08-11 | 2016-08-11 | A kind of selective catalytic reduction low-temperature denitration tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206008467U true CN206008467U (en) | 2017-03-15 |
Family
ID=58247505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620866223.0U Active CN206008467U (en) | 2016-08-11 | 2016-08-11 | A kind of selective catalytic reduction low-temperature denitration tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206008467U (en) |
-
2016
- 2016-08-11 CN CN201620866223.0U patent/CN206008467U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |