CN206778179U - Coal-fired plant flue gas denitrating system - Google Patents
Coal-fired plant flue gas denitrating system Download PDFInfo
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- CN206778179U CN206778179U CN201720296506.0U CN201720296506U CN206778179U CN 206778179 U CN206778179 U CN 206778179U CN 201720296506 U CN201720296506 U CN 201720296506U CN 206778179 U CN206778179 U CN 206778179U
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- China
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- flue gas
- urea
- dosing chamber
- spray gun
- urea liquid
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Abstract
It the utility model is related to a kind of coal-fired plant flue gas denitrating system, including burner hearth and urea liquid stocking system, it is characterised in that：Urea liquid stocking system includes urea Chu Rong storehouses, elevator, electronic scale, conveying worm, dosing chamber and urea liquid storage tank, agitating device is provided with the top of the dosing chamber, the connecting pipeline of dosing chamber and the urea liquid storage tank is provided with feeding engine, the outlet of urea liquid storage tank is connected with solution pump, in the middle part of the burner hearth multiple spray guns are provided with ellipsoid planar and ellipsoid planar side wall, the inlet ductwork of the spray gun is connected with the outlet of solution pump, all spray gun layered arrangements, the spout of each layer of spray gun is close to each other and spout central line is located at same level, the inlet ductwork of the spray gun is separately connected by connecting tube with steam or air-source.Its is reasonable in design, using reliable, solves the problems, such as that existing flue gas denitrification system denitration efficiency is low, significantly improves denitrating flue gas efficiency.
Description
Technical field
It the utility model is related to a kind of coal-fired plant flue gas denitrating system.
Background technology
Mainly include SCR, SNCR and SNC into the ripe coal-fired plant flue gas denitration technology of commercial Application at present
R+SCR GC-MSs.
Wherein, SNCR denitration technology is that the urea liquid containing NHx bases is sprayed into fire box temperature as 850 DEG C ~ 1100 DEG C
Region, reducing agent rapid thermal decomposition is into NH3With other accessory substances, subsequent NH3With the NO in flue gasxCarry out SNCR reactions and generate
N2.This method, can be by being transformed to realize boiler using burner hearth as reactor.
Within the scope of 850 ~ 1100 DEG C of this narrow temperature of burner hearth, under without catalyst action, carbamide reducing agent is optional
Reduce to selecting property the NO in flue gasx, substantially not with O in flue gas2Effect, key reaction are as follows：
NH3For reducing agent NH3+4NO+O2 → 4N2+6H2O
Urea is reducing agent（NH2）2CO → 2NH2+CO
NH2+NO → N2+ H2O
2CO+2NO → N2+ 2CO2
The NO of SNCR techniquesxDenitration efficiency depends primarily on reaction temperature, NH3With NOxStoichiometric proportion, mixability,
Reaction time etc..But the denitration efficiency of the urea liquid in the course of the work, containing NHx bases is relatively low, unsatisfactory.
The content of the invention
The purpose of this utility model is to provide for a kind of reasonable in design, service-strong coal-fired plant flue gas denitration
System, solve the problems, such as that existing flue gas denitrification system denitration efficiency is low, significantly improve denitrating flue gas efficiency.
The technical solution of the utility model is：
A kind of coal-fired plant flue gas denitrating system, including burner hearth and urea liquid stocking system, it is characterised in that：The urine
Plain solution storage system include urea Chu Rong storehouses, be connected with urea Chu Rong storehouses dog-house elevator, located at urea Chu Rong storehouses
The electronic scale of bottom, the conveying worm being connected with electronic scale bottom, the dosing chamber below conveying worm discharging opening,
The urea liquid storage tank being connected with dosing chamber, the dosing chamber top are provided with agitating device, dosing chamber and the urea liquid storage
The connecting pipeline of tank is provided with feeding engine, and the outlet of the urea liquid storage tank is connected with solution pump, is in ellipse in the middle part of the burner hearth
Dome shape and ellipsoid planar side wall is provided with multiple spray guns, the inlet ductwork of the spray gun is connected with the outlet of solution pump, owns
Spray gun layered arrangement, the spout of each layer of spray gun is close to each other and spout central line is located at same level, the spray gun
Inlet ductwork be separately connected by connecting tube with steam or air-source, between the steam or air-source and dosing chamber be provided with conveying
Pipeline, the dosing chamber top are additionally provided with the pipeline being connected with water supply, and the outlet of the water supply is additionally provided with dilution water
Pump, the export pipeline of the dilution water pump are separately connected with the inlet ductwork of spray gun.
Above-mentioned coal-fired plant flue gas denitrating system, the upper furnace are cylindrical in shape, and top sidewall is provided with outlet flue, goes out
The lower section of mouth is provided with flue gas flow-stopping plate.
Above-mentioned coal-fired plant flue gas denitrating system, in addition to the electri forklift to elevator transferring raw material.
Above-mentioned coal-fired plant flue gas denitrating system, the long axis of the ellipsoid planar side wall of the burner hearth are put down with horizontal plane
OK.
The beneficial effects of the utility model are：
1st, due to being in the increase of ellipsoid planar, the then injection of urea liquid and action space in the middle part of burner hearth, denitration effect is enhanced
Fruit；
2nd, because the spout of each layer of spray gun is close to each other and spout central line is located at same level, then spray gun pair
Penetrate and broken up Solutions Center, be more conducive to fully contact with flue gas, enhance denitration effect, significantly improve denitration efficiency, save
About urea raw material.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure：1. electri forklift, 2. elevators, 3. electronic scales, 4. urea Chu Rong storehouses, 5. water supply, 6. steam or sky
Source of the gas, 7. dilution water pumps, 8. urea liquid storage tanks, 9. burner hearths, 10. flue gas flow-stopping plates, 11. ellipsoid planar side walls, 12. spray guns,
13. solution pump, 14. feeding engines, 15. dosing chambers, 16. agitating devices, 17. conveying worms.
Embodiment
As shown in figure 1, the coal-fired plant flue gas denitrating system, including burner hearth 9 and urea liquid stocking system, the urea
Solution storage system include urea Chu Rong storehouses 4, be connected with the dog-house of urea Chu Rong storehouses 4 elevator 2, located at urea Chu Rong storehouses
The electronic scale 3 of 4 bottoms, the conveying worm 17 being connected with the bottom of electronic scale 3, below the discharging opening of conveying worm 17
Dosing chamber 15, the urea liquid storage tank 8 being connected with dosing chamber 15, the top of dosing chamber 15 is provided with agitating device 16, described to match somebody with somebody
The connecting pipeline of material pond 15 and urea liquid storage tank 8 is provided with feeding engine 14, and the outlet of the urea liquid storage tank 8 is connected with molten
Liquid pump 13, the middle part of burner hearth 9 are provided with multiple spray guns 12 in ellipsoid planar and ellipsoid planar side wall 11, and the spray gun 12 enters
Mouth pipeline is connected with the outlet of solution pump 13, all layered arrangements of spray gun 12, and the spout of each layer of spray gun 12 is close to each other simultaneously
And spout central line is located at same level, the inlet ductwork of the spray gun 12 separately passes through connecting tube and steam or the phase of air-source 6
Even, transfer pipeline is provided between the steam or air-source 6 and dosing chamber 15, the top of dosing chamber 15 is additionally provided with and running water
The connected pipeline in source 5, the outlet of the water supply 5 are additionally provided with dilution water pump 7, the export pipeline of the dilution water pump 7 separately with
The inlet ductwork of spray gun 12 is connected.The top of burner hearth 9 is cylindrical in shape, and top sidewall is provided with outlet flue, the lower section of outlet flue
Provided with flue gas flow-stopping plate 10.The long axis and plane-parallel of the ellipsoid planar side wall 11 of the burner hearth 9.In the present embodiment, take off
Nitre system also includes the electri forklift 1 to the transferring raw material of elevator 2.
Claims (4)
1. a kind of coal-fired plant flue gas denitrating system, including burner hearth and urea liquid stocking system, it is characterised in that：The urea
Solution storage system holds orlop including urea Chu Rong storehouses, the elevator being connected with urea Chu Rong storehouses dog-house, located at urea storage
The electronic scale in portion, the conveying worm being connected with electronic scale bottom, the dosing chamber below conveying worm discharging opening, with
The connected urea liquid storage tank of dosing chamber, the dosing chamber top are provided with agitating device, dosing chamber and the urea liquid storage tank
Connecting pipeline be provided with feeding engine, the outlet of the urea liquid storage tank is connected with solution pump, is in ellipsoid in the middle part of the burner hearth
Planar and ellipsoid planar side wall is provided with multiple spray guns, the inlet ductwork of the spray gun is connected with the outlet of solution pump, all sprays
Rifle layered arrangement, the spout of each layer of spray gun is close to each other and spout central line is located at same level, the spray gun
Inlet ductwork is separately connected by connecting tube with steam or air-source, and delivery pipe is provided between the steam or air-source and dosing chamber
Road, the dosing chamber top are additionally provided with the pipeline being connected with water supply, and the outlet of the water supply is additionally provided with dilution water pump,
The export pipeline of the dilution water pump is separately connected with the inlet ductwork of spray gun.
2. coal-fired plant flue gas denitrating system according to claim 1, it is characterised in that：The upper furnace is cylindrical in shape,
And top sidewall is provided with outlet flue, the lower section of outlet flue is provided with flue gas flow-stopping plate.
3. coal-fired plant flue gas denitrating system according to claim 1, it is characterised in that：Also include conveying original to elevator
The electri forklift of material.
4. coal-fired plant flue gas denitrating system according to claim 1, it is characterised in that：The ellipsoid planar side of the burner hearth
The long axis and plane-parallel of wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720296506.0U CN206778179U (en) | 2017-03-24 | 2017-03-24 | Coal-fired plant flue gas denitrating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720296506.0U CN206778179U (en) | 2017-03-24 | 2017-03-24 | Coal-fired plant flue gas denitrating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206778179U true CN206778179U (en) | 2017-12-22 |
Family
ID=60706471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720296506.0U Active CN206778179U (en) | 2017-03-24 | 2017-03-24 | Coal-fired plant flue gas denitrating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206778179U (en) |
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2017
- 2017-03-24 CN CN201720296506.0U patent/CN206778179U/en active Active
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