CN108607358A - A kind of full load denitrification apparatus having urea smoke gas pyrolysis function - Google Patents
A kind of full load denitrification apparatus having urea smoke gas pyrolysis function Download PDFInfo
- Publication number
- CN108607358A CN108607358A CN201810429575.3A CN201810429575A CN108607358A CN 108607358 A CN108607358 A CN 108607358A CN 201810429575 A CN201810429575 A CN 201810429575A CN 108607358 A CN108607358 A CN 108607358A
- Authority
- CN
- China
- Prior art keywords
- urea
- flue
- bypass flue
- bypass
- full load
- 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.)
- Pending
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
- B01D53/8621—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
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2067—Urea
-
- 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
Abstract
A kind of full load denitrification apparatus having urea smoke gas pyrolysis function of the present invention is related to boiler technology field.Using " urea smoke gas pyrolysis ", " full load denitration " key technology, by boiler back end ductwork reversal chamber, bypass flue, bypass flue adjusting door, expansion joint, shutoff door, urea solution metering distributor, urea liquid spray gun, ammonia current equalizer is constituted, flue collector adjusts the equipment such as door, in back-end ductwork reversal chamber, a gas bypass is taken above low temperature superheater, a kind of structure of arrangement ammonia-gas spraying device and similar boiler mid-board, can carry out the denitration of boiler full load and urea smoke gas pyrolysis in bypass flue.Required electric energy or other fuel energies when instead of urea pyrolysis.Equipment, simple and ingenious structure, the effect stabilities such as urea pyrolysis stove, dilution wind-powered electricity generation heater or combustion oil/gas duct insert heater, ammonia-spraying grid in the existing known technology of device substitution are reliable.
Description
Technical field
A kind of full load denitrification apparatus having urea smoke gas pyrolysis function of the present invention, is related to boiler technology field；Tool
Body is related to flue gas SCR denitration technology field.
Background technology
Currently, the country widely used SCR in thermal power plant（Selective catalytic reduction）Control the discharge of NOx.Different
The suitable reaction temperature of catalyst is different, and the input gas temperature of denitrification apparatus changes with boiler load and changed.Work as pot
When stove load drops to unit load 50%~60%, SCR reactor inlet flue-gas temperatures are relatively low, and one side catalyst activity can compare
It is low, still further aspect, the SO in reducing agent ammonia and flue gas3Reaction generates hydrogen sulfate ammonia and can deposit on a catalyst, further drops
The activity of low catalyst, or even the irreversible activity of catalyst is caused to reduce.So the existing known technology of denitrating flue gas with it is existing
Shape there is many insufficient, defects and drawback be obvious.
The SCR denitration technology for utilizing urea as reducing agent, needing to inject urea solution into must after pyrolysis oven is pyrolyzed
To ammonia, it to be used for denitration.Existing known technology is generally obtained using electric heater or fuel oil/gas and hot air stove required for urea pyrolysis
Heat and temperature environment.The technology there are energy consumptions it is larger, operating cost is high, less efficient the problems such as.
Professional knowledge based on inventor and working experience and the unremitting pursuit to cause, conscientiously investigate, analyze,
Solution is summarized, on the basis of the existing known technology of research and present situation, and spy takes " full load denitration " and " urea smoke gas pyrolysis " crucial skill
Art has been succeeded in developing " a kind of full load denitrification apparatus having urea smoke gas pyrolysis function ".The present invention utilizes computer simulation
Flow field condition establishes sampling sites mathematical model of flow field.Then according to simulation result of calculation, optimize flue shape.Stove is opened in guarantee
When the inadequate situation of SCR inlet smoke temperature, high-temperature flue gas at boiler back end ductwork reversal chamber can be led to SCR inlet flue, lead to
It crosses bypass flue and improves SCR inlet smoke temperature.Condition is provided for the SCR system that smoothly puts into operation.
On bypass flue be arranged urea liquid spray gun, meet spray ammonia require when, ammonia spraying amount with boiler load change and from
It is dynamic to adjust.Urea liquid is directly pyrolyzed in bypass flue by the high-temperature flue gas introduced from reversal chamber, becomes ammonia and water, dioxy
Change carbon.Gas after urea liquid spray gun is ammonia flue gas mixed gas, and mixed gas is equal by ammonia in bypass flue
After flowing device, realizes and be sent into SCR inlet flue after concentration field is stablized.
The technology disclosure satisfy that the denitration under boiler operatiopn full load is run.It can realize that the flue gas of urea is directly warm again simultaneously
Solution avoids and is pyrolyzed urea using high-order heat source as electric energy, fuel oil, natural gas, due to the subregion generation using bypass flue
The external pyrolysis oven needed for urea pyrolysis has been replaced, the manufacturing cost of urea pyrolysis device is made to reduce, system configuration simplifies.The present invention
Succeed in developing, the existing known technology of effective solution and insufficient, defect and drawback existing for present situation.
Invention content
The present invention takes " urea smoke gas pyrolysis ", " full load denitration " key technology, and door, shutdown are adjusted by bypass flue
Door, urea liquid spray gun, urea solution metering distributor, bypass flue, bypass flue ammonia current equalizer, flue collector are adjusted
Door, bypass flue ammonia current equalizer, bypass flue demarcation strip are constituted, and bypass flue, bypass flue adjust door, urea liquid
Metered dispensing unit, urea liquid spray gun, bypass flue ammonia current equalizer are fixedly connected, and expansion is provided on bypass flue
It section, urea solution metering distributor, urea liquid spray gun and is fixedly connected with walling of flue, shutoff door is arranged in bypass flue
Rear end.
The purpose reached through the invention is：1., the present invention take " urea smoke gas pyrolysis ", " urea smoke gas pyrolysis " crucial
Technology provides a kind of " full load denitrification apparatus having urea smoke gas pyrolysis function " new equipment.It realizes straight using flue gas
Connect pyrolysis urea, avoid using as electric energy, fuel oil, natural gas high-order heat source pyrolysis urea 2., the present invention take " full load
Denitration " key technology targetedly arranges gas bypass flue, connects and draw back-end ductwork reversal chamber high-temperature flue gas to SCR inlet
Flue improves SCR inlet smoke temperature, meets unit denitration requirement.3., rear end increases bypass flue and separates in bypass flue of the present invention
Plate, shutoff door, gas residence time meets when urea pyrolysis can be effectively ensured《The thermal power plants DLT 5480-2013 flue gas is de-
Nitre designing technique regulation》It is required that ensureing stability and the safety of denitrating system operation.4., the present invention it is scientific and reasonable for structure
And it is simple it is ingenious, so that urea pyrolysis stove and bypass flue function is combined into one.Easy to use and effect stability is reliable, easy to make
With use, and cost of manufacture and operation cost are low.5., the present invention can effectively substitute spray ammonia lattice in existing known technology
Grid, the blocking of the ammonia-spraying grid effectively avoided or scale problems.6., the invention avoids existing known technologies using electric energy or
The high-orders energy sources for heating such as fuel oil, natural gas dilutes wind and carries out urea pyrolysis, reduces urea pyrolysis horsepower requirements, solves existing
Known technology and insufficient, defect and drawback existing for present situation.7., the present invention succeed in developing, be effectively increased to the industry
Technical merit, can wide popularization and application.
To achieve the above object, technical solution provided by the invention is：
A kind of full load denitrification apparatus having urea smoke gas pyrolysis function adjusts door, shutoff door, urea liquid by bypass flue
Spray gun, urea solution metering distributor, bypass flue, bypass flue ammonia current equalizer, flue collector adjust door, expansion joint,
Bypass flue demarcation strip is constituted.
A kind of full load denitrification apparatus having urea smoke gas pyrolysis function, bypass flue adjust door, shutdown
Door, urea liquid spray gun, urea solution metering distributor, bypass flue, bypass flue ammonia current equalizer, flue collector are adjusted
Door, expansion joint, bypass flue demarcation strip are fixedly connected, and expansion joint, urea solution metering distribution dress are provided on bypass flue
Set, urea liquid spray gun and be fixedly connected with walling of flue, rear end is arranged in bypass flue in shutoff door, using bypass flue wall with
Bypass flue separation baffles are fixed.
A kind of full load denitrification apparatus having urea smoke gas pyrolysis function is from back-end ductwork reversal chamber, low temperature mistake
High-temperature flue gas is drawn above hot device, the bypass flue is rectangular flue.
A kind of full load denitrification apparatus having urea smoke gas pyrolysis function is designed in flue collector horizontal flue and is led
Flue adjusts door.
The present invention operation principle and the course of work be：As shown in Figure of description, operation principle of the invention and work
Process is simple and clear, and the present invention has given full play to " full load denitration ", the effect of " urea smoke gas pyrolysis " key technology, from tail portion
High-temperature flue gas is drawn above flue reversal chamber, low temperature superheater, and urea liquid spray gun is set in bypass flue and control urea is molten
The urea of liquid dosage dissolves metered dispensing unit.Opening stove and low load stage needs to promote SCR inlet cigarette using bypass flue
Wen Shi turns down flue collector and adjusts door, and bypass flue adjusts door standard-sized sheet, and shutoff door standard-sized sheet, boiler smoke is via whole bypass flues
Runner enters SCR inlet；When SCR inlet smoke temperature reaches SCR normal operating temperatures, shutoff door is closed, gradually opens big main cigarette
Road adjusts door, and bypass flue adjusts door and gradually turns down, and ensures to dilute air quantity in bypass flue required for urea pyrolysis, is entire pot
Furnace system provides the necessary reducing agent of denitration.
The urea liquid spray gun being arranged on bypass flue, ammonia spraying amount are automatically adjusted as boiler load changes.By urine
Gas after plain solution spray gun is ammonia flue gas mixed gas, and mixed gas passes through flue ammonia current equalizer in bypass flue
After mixing, SCR inlet is entered by flue collector.Its is extremely easy to use.Design is scientific and reasonable, simple in structure by the present invention
It is ingenious, be easy to low manufacture cost, using effect is reliable and stable, service life is long, solves existing known technology and present situation and exists
Deficiency, defect and drawback, be effectively increased to the technical merit of the industry.
As a result of technical solution provided by the present invention；Due to this invention takes " urea smoke gas pyrolysis ", " bearing entirely
Lotus denitration " key technology；Described in operation principle and the course of work due to the present invention；Door, shutoff door, urine are adjusted by bypass flue
Plain solution spray gun, urea solution metering distributor, bypass flue, bypass flue ammonia current equalizer, flue collector adjust door, side
Road flue demarcation strip, expansion joint are constituted, and bypass flue, bypass flue adjusting door, urea solution metering distributor, urea are molten
Liquid spray gun, bypass flue ammonia current equalizer, bypass flue demarcation strip are fixedly connected, be provided on bypass flue expansion joint,
It urea solution metering distributor, urea liquid spray gun and is fixedly connected with walling of flue, after shutoff door is arranged in bypass flue
End.
So that the present invention with existing known technology compared with present situation, the advantageous effect of acquisition is：
1, this invention takes " urea smoke gas pyrolysis ", " urea smoke gas pyrolysis " key technology, to provide, " one kind having urine
The full load denitrification apparatus of plain smoke gas pyrolysis function " new equipment, urea pyrolysis stove, dilution wind in substituted existing known technology
Electric heater or combustion oil/gas duct insert heater, ammonia-spraying grid.
2, the present invention takes " full load denitration ", " urea smoke gas pyrolysis " key technology, targetedly in bypass flue
Urea liquid spray gun, the bypass flue in full load denitration technology and urea pyrolysis technology are arranged on the basis of full load denitration technology
In pyrolysis oven be combined into one, simplify system, reduce system cost.
3, the present invention uses computer modeling technique, and flow field model is first established according to flue situation, by calculating and on side
Ammonia current equalizer is arranged in road flue, can effectively improve the ammonia uniformity of bypass flue.
4, scientific and reasonable for structure and simple ingenious, easy to use and effect stability of the invention is reliable, easy to make and make
With and cost of manufacture and operation cost it is low.
5, the present invention solves insufficient, defect and drawback existing for existing known technology and present situation.
6, of the invention to succeed in developing, it has effectively been increased to the technical merit of the industry, it can wide popularization and application.
Description of the drawings
Figure of description is the schematic diagram of the specific embodiment of the invention.
Label in figure：1, back-end ductwork reversal chamber, 2, low temperature superheater, 3, bypass flue import, 4, bypass flue tune
Section door, 5, expansion joint, 6, shutoff door, 7, urea liquid spray gun, 8, urea solution metering distributor, 9, bypass flue, 10,
Bypass flue ammonia current equalizer, 11, bypass flue demarcation strip, 12, flue collector adjust door.
Specific implementation mode
With reference to the accompanying drawings of the specification, the present invention is described in detail.As shown in Figure of description：
A kind of full load denitrification apparatus having urea smoke gas pyrolysis function, by 1, back-end ductwork reversal chamber, 2, low temperature superheater,
3, bypass flue import, 4, bypass flue adjust door, 5, expansion joint, 6, shutoff door, 7, urea liquid spray gun, 8, urea liquid
Metered dispensing unit, 9, bypass flue, 10, bypass flue ammonia current equalizer, 11, bypass flue demarcation strip, 12, flue collector tune
Section door forms.
A kind of full load denitrification apparatus having urea smoke gas pyrolysis function, bypass flue, bypass flue tune
Section door, urea solution metering distributor, urea liquid spray gun, bypass flue ammonia current equalizer are fixedly connected, and bypass cigarette
It is provided with expansion joint, urea solution metering distributor, urea liquid spray gun on road and is fixedly connected with walling of flue, shutoff door is set
The rear end in bypass flue is set, is fixed using bypass flue wall and bypass flue demarcation strip.
A kind of full load denitrification apparatus having urea smoke gas pyrolysis function is from back-end ductwork reversal chamber, low temperature mistake
Bypass flue gas is drawn above hot device, the bypass flue is rectangular flue.
A kind of full load denitrification apparatus having urea smoke gas pyrolysis function is designed in flue collector horizontal flue and is led
Flue adjusts door.
A kind of full load denitrification apparatus urea liquid spray gun having urea smoke gas pyrolysis function is arranged in bypass
In flue.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the present invention in any form；All one's own professions
The those of ordinary skill of industry, can be shown in by specification attached drawing and described above and swimmingly implement the present invention；But it is not departing from
Technical solution of the present invention and the equivalent variations for making differentiation are the equivalent embodiment of the present invention, still fall within protection of the present invention
Technical solution.
Claims (4)
1. a kind of full load denitrification apparatus having urea smoke gas pyrolysis function, it is characterised in that：Door is adjusted by bypass flue
（4）, shutoff door（6）, urea liquid spray gun（7）, urea solution metering distributor（8）, bypass flue（9）, bypass flue ammonia
Gas current equalizer（10）, flue collector adjust door（12）, bypass flue demarcation strip（11）It constitutes；
A kind of full load denitrification apparatus having urea smoke gas pyrolysis function flies bypass flue ammonia current equalizer
（10）, bypass flue（9）, bypass flue adjust door（4）, urea solution metering distributor（8）, urea liquid spray gun（7）, it is main
Flue adjusts door（12）It is fixedly connected, bypass flue（9）On be provided with expansion joint（5）, urea solution metering distributor
（8）, urea liquid spray gun（7）And it is fixedly connected with walling of flue, shutoff door（6）Rear end is set in bypass flue, flue is utilized
Wall and bypass flue demarcation strip（11）It is fixed.
2. a kind of full load denitrification apparatus having urea smoke gas pyrolysis function according to claim 1, it is characterised in that：
Bypass flue described in a kind of full load denitrification apparatus having urea smoke gas pyrolysis function（9）Middle rear end setting bypass cigarette
Road demarcation strip（11）, shutoff door（6）, change flue circulation area and obtain suitable flue gas flow rate, realize and utilize urea liquid meter
Measure distributor（8）, urea liquid spray gun（7）Direct-injection urea realizes urea smoke gas pyrolysis in flue.
3. a kind of full load denitrification apparatus having urea smoke gas pyrolysis function according to claim 1, it is characterised in that：
Described device is in bypass flue（9）Bypass flue ammonia current equalizer is arranged in middle rear end（10）.
4. a kind of full load denitrification apparatus having urea smoke gas pyrolysis function according to claim 1, it is characterised in that：
The shutoff door（6）Rear end is set in bypass flue, with bypass flue demarcation strip（11）By bypass flue（9）Middle rear end is divided into
Two parts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810429575.3A CN108607358A (en) | 2018-05-08 | 2018-05-08 | A kind of full load denitrification apparatus having urea smoke gas pyrolysis function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810429575.3A CN108607358A (en) | 2018-05-08 | 2018-05-08 | A kind of full load denitrification apparatus having urea smoke gas pyrolysis function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108607358A true CN108607358A (en) | 2018-10-02 |
Family
ID=63662500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810429575.3A Pending CN108607358A (en) | 2018-05-08 | 2018-05-08 | A kind of full load denitrification apparatus having urea smoke gas pyrolysis function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108607358A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109173722A (en) * | 2018-10-19 | 2019-01-11 | 中科锐能（北京）科技有限公司 | A kind of SCR system sectional precisely sprays ammonia method |
| CN109289520A (en) * | 2018-10-16 | 2019-02-01 | 中国华电科工集团有限公司 | A kind of low energy consumption distribution out of stock system and the method that is pyrolyzed urea liquid |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204710105U (en) * | 2015-02-04 | 2015-10-21 | 刘炎军 | A kind of full load equipment for denitrifying flue gas of Industrial Boiler |
| CN205133164U (en) * | 2015-10-28 | 2016-04-06 | 沈阳洛卡环保工程有限公司 | System for utilize boiler bypass to carry out urea pyrolysis system ammonia |
| CN205392185U (en) * | 2016-02-19 | 2016-07-27 | 北京西山新干线除尘脱硫设备有限公司 | Gas boiler catalytic denitrification system |
| CN205825086U (en) * | 2016-05-21 | 2016-12-21 | 大唐三门峡发电有限责任公司 | Improve the system of coal steam-electric plant smoke denitration inlet flue gas temperature |
| CN106582234A (en) * | 2016-10-20 | 2017-04-26 | 北京巴布科克·威尔科克斯有限公司 | Boiler wide-load urea direct injection pyrolysis flue gas denitrification system |
| CN208406624U (en) * | 2018-05-08 | 2019-01-22 | 湖南大唐节能科技有限公司 | A kind of full load denitrification apparatus having urea smoke gas pyrolysis function |
-
2018
- 2018-05-08 CN CN201810429575.3A patent/CN108607358A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204710105U (en) * | 2015-02-04 | 2015-10-21 | 刘炎军 | A kind of full load equipment for denitrifying flue gas of Industrial Boiler |
| CN205133164U (en) * | 2015-10-28 | 2016-04-06 | 沈阳洛卡环保工程有限公司 | System for utilize boiler bypass to carry out urea pyrolysis system ammonia |
| CN205392185U (en) * | 2016-02-19 | 2016-07-27 | 北京西山新干线除尘脱硫设备有限公司 | Gas boiler catalytic denitrification system |
| CN205825086U (en) * | 2016-05-21 | 2016-12-21 | 大唐三门峡发电有限责任公司 | Improve the system of coal steam-electric plant smoke denitration inlet flue gas temperature |
| CN106582234A (en) * | 2016-10-20 | 2017-04-26 | 北京巴布科克·威尔科克斯有限公司 | Boiler wide-load urea direct injection pyrolysis flue gas denitrification system |
| CN208406624U (en) * | 2018-05-08 | 2019-01-22 | 湖南大唐节能科技有限公司 | A kind of full load denitrification apparatus having urea smoke gas pyrolysis function |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109289520A (en) * | 2018-10-16 | 2019-02-01 | 中国华电科工集团有限公司 | A kind of low energy consumption distribution out of stock system and the method that is pyrolyzed urea liquid |
| CN109173722A (en) * | 2018-10-19 | 2019-01-11 | 中科锐能（北京）科技有限公司 | A kind of SCR system sectional precisely sprays ammonia method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205392185U (en) | Gas boiler catalytic denitrification system | |
| CN205500799U (en) | Urea pyrolysis device | |
| CN105498532A (en) | Automatic control SCR flue gas denitrification urea pyrolysis system | |
| CN204044136U (en) | A kind of experimental provision evaluated for SCR denitrating flue gas honeybee shape catalyst activity | |
| CN205216566U (en) | SNCR (Selective non catalytic reduction) denitration device | |
| CN108607358A (en) | A kind of full load denitrification apparatus having urea smoke gas pyrolysis function | |
| CN108816020A (en) | A kind of full load combined denitration optimal control method | |
| CN106582234A (en) | Boiler wide-load urea direct injection pyrolysis flue gas denitrification system | |
| CN204369580U (en) | A kind of urea pyrolysis ammonia system | |
| CN208406624U (en) | A kind of full load denitrification apparatus having urea smoke gas pyrolysis function | |
| CN206424766U (en) | A kind of wide load urea direct-injection pyrolysis smoke denitrating system of boiler | |
| CN108105794A (en) | A kind of SCR denitration system inlet flue gas temperature adaptive regulation method | |
| CN207081021U (en) | A kind of outer denitrating technique system of chain furnace high/low temperature flue gas holding furnace | |
| CN112588108A (en) | Flue gas denitration system and method under full-load working condition of boiler | |
| CN106955592A (en) | The urea pyrolysis ammonia structures and methods of SCR denitration system sulfur dioxide/sulphur trioxide conversion rate can be reduced | |
| CN204806439U (en) | Urea pyrolysis high temperature air heat exchanger in denitration flow | |
| CN206676232U (en) | A kind of zero-emission urea pyrolysis system for setting up high-temperature flue gas heat exchanger | |
| CN210057905U (en) | Denitration system of waste heat boiler of gas turbine | |
| CN107449876A (en) | A kind of reducing agent distributes regulating system | |
| CN209378805U (en) | A kind of distributed denitrating system of low energy consumption | |
| CN206199039U (en) | A kind of denitration ammonia gas for pretreatment system | |
| CN206868015U (en) | SCR denitration system SO can be reduced2/SO3The urea pyrolysis ammonia structure of conversion ratio | |
| CN109999661A (en) | A kind of gas-turbine waste heat boiler denitrating system and its course of work | |
| CN106166455A (en) | A kind of denitration ammonia gas for pretreatment system | |
| CN206199013U (en) | A kind of flue gas denitrification system ammonia gas for pretreatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |