CN105351918A - Lean oxygen combustion process for improving capture efficiency of carbon dioxide - Google Patents
Lean oxygen combustion process for improving capture efficiency of carbon dioxide Download PDFInfo
- Publication number
- CN105351918A CN105351918A CN201510755284.XA CN201510755284A CN105351918A CN 105351918 A CN105351918 A CN 105351918A CN 201510755284 A CN201510755284 A CN 201510755284A CN 105351918 A CN105351918 A CN 105351918A
- Authority
- CN
- China
- Prior art keywords
- combustion
- oxygen
- carbon dioxide
- capture efficiency
- burning
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/002—Supplying water
- F23L7/005—Evaporated water; Steam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2201/00—Staged combustion
- F23C2201/30—Staged fuel supply
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a lean oxygen combustion process for improving capture efficiency of carbon dioxide. The process includes the following steps that S1, high-temperature smoke generated by boiler combustion is subjected to waste heat recovery, and heat generated by recovery is used for heating medium water to generate water vapor at the temperature of 210 DEG C-230 DEG C; S2, part of the water vapor and primary air are fed into a hearth of a boiler, pulverized coal is combusted in a first combustion flame region, and the pulverized coal is fed into a second flame region through rotational flow, wherein one part of the water vapor and secondary air are mixed and fed into the second flame region for pulverized coal combustion, and the pulverized coal is subjected to lean oxygen combustion in the second combustion flame region; and S3, after dust is separated out of the generated smoke through a cyclone separator, waste heat recovery is conducted, after being purified, the smoke is treated to be in a liquid state through a compression system, and CO2 in the smoke is separated and recovered. It is avoided that NOx and SO2 in the smoke are continuously enriched along with increase of the number of cycles, and meanwhile the capture efficiency of CO2 is improved.
Description
Technical field
The present invention relates to boiler environmental technology field, particularly a kind of combustion with meagre oxygen technique improving carbon dioxide capture efficiency.
Background technology
The pollutant of fuel combustion discharge is the major part of atmosphere pollution, and smoke components is CO mainly
2, a small amount of water vapour, a small amount of O
2, N
2and pollutant NO
xand SO
2.Along with the quick growth of energy demand and the sharply increase of fuel use amount, cause greenhouse gases CO
2continue to increase in natural cumulant, control fuel combustion process CO
2discharge, for reply greenhouse effects and global warming there is important effect.Particularly for China, in view of the feature of its energy resource structure based on coal, CO
2emission level sharply increases and has occupy the present situation of No. 1 in the world, develops efficient coal-fired CO
2emission-reduction technology, controls the coal-fired CO of China
2emission level, has great social effect and economic worth.
Fuel combustion techniques is divided into oxygen-enriched combustion technology and combustion with meagre oxygen technology, and combustion with meagre oxygen technology can suppress NO
xgeneration, and have certain energy-saving effect, the energy-saving principle of combustion with meagre oxygen is: recycle high-temperature flue gas, and high-temperature flue gas can maintain the high-temperature in burner hearth, thus the fuel quantity that needs are fed and air capacity are just reduced.
But, find after deliberation, directly utilize high-temperature flue gas to carry out circulation and still have a large amount of problem to exist: S1, circulation due to a large amount of flue gas, cause NO in flue gas
xand SO
2content can the continuous enrichment along with the increase of cycle-index, flue gas recirculation repeatedly simultaneously can increase air leakage phenomena, and makes N in flue gas
2content increases; CO in S2, reduction combustion with meagre oxygen flue gas
2concentration, and then increase the difficulty of subsequent compression purifying, reduce CO
2capture rate, be unfavorable for CO
2further exploitation; S3, a large amount of flue gas recirculations can cause boiler easily the phenomenons such as fouling to occur, and increase the weight of the burden of boiler attendance.
Summary of the invention
The invention provides a kind of combustion with meagre oxygen technique improving carbon dioxide capture efficiency, at effective control NO
xgeneration while, can CO be improved
2capturing efficiency.
For achieving the above object, technical scheme of the present invention is:
Improve a combustion with meagre oxygen technique for carbon dioxide capture efficiency, comprise the following steps:
S1, waste heat recovery is carried out to the high-temperature flue gas that boiler combustion produces, reclaim the heat that generates by the water vapour of medium water heating generation 210 ~ 230 DEG C;
S2, wherein a part of steam and First air are sent into the burner hearth of boiler, the volume ratio of steam and First air is 1 ~ 2:60, makes coal dust in the burning of burning first flame district and with eddy flow, coal dust is sent into the second flame district; Wherein a part of steam mixes with Secondary Air, and send into the second flame district of coal dust firing, the volume ratio of steam and Secondary Air is 1 ~ 2:40, makes coal dust form combustion with meagre oxygen in burning second flame district, at suppression NO
xwhile generating, improve the seizure effect of carbon dioxide in flue gas;
The flue gas of S3, generation is isolated after dust through cyclone separator, carries out waste heat recovery, after gas cleaning, by compressibility, gas treatment is become Liquid segregation recovery CO wherein
2, remaining gas is discharged from chimney.
Further, described First air oxygen-supplying amount is 75 ~ 79% of fuel combustion oxygen demand; Described Secondary Air oxygen-supplying amount is 21 ~ 25% of fuel combustion oxygen demand.
Preferred, described First air oxygen-supplying amount is 78% of fuel combustion oxygen demand; Described Secondary Air oxygen-supplying amount is 22% of fuel combustion oxygen demand.
Further, described boiler furnace is in burning-out zone part and is provided with reducing agent spray gun, and reducing agent is sprayed into burning-out zone and reduces NO by reducing agent spray gun
xdischarge.
Further, described reducing agent is ammoniacal liquor or urea liquid.
The present invention has the following advantages:
(1) the heat heating medium water of high-temperature flue gas is utilized, by mixing of steam and First air and Secondary Air, regulate temperature and the boiler heat exchange state of burner hearth Flame, compared with traditional combustion with meagre oxygen mode, do not recycle the use of circulating flue gas, avoid NO in flue gas
xand SO
2content can the continuous enrichment along with the increase of cycle-index, improve CO simultaneously
2capture rate;
(2) strict control First air and Secondary Air send oxygen amount, effectively suppress thermal NO
xformed;
(3) avoid the repeatedly circulation of flue gas, alleviate the burden of boiler, there is the advantage of energy-conserving and environment-protective;
(4) CO in flue gas is conducive to
2recycling, cost-saving, achieve the development of recycling economy.
Accompanying drawing explanation
Fig. 1 is process flow diagram of the present invention.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, but protection scope of the present invention and range of application are not limited to following examples:
Embodiment 1
Improve a combustion with meagre oxygen technique for carbon dioxide capture efficiency, shown in composition graphs 1, comprise the following steps:
S1, waste heat recovery is carried out to the high-temperature flue gas that boiler combustion produces, reclaim the heat that generates by the water vapour of medium water heating generation 210 ~ 220 DEG C;
S2, wherein a part of steam and First air are sent into the burner hearth of boiler, the volume ratio of steam and First air is 1:30, makes coal dust in the burning of burning first flame district and with eddy flow, coal dust is sent into the second flame district; Wherein a part of steam mixes with Secondary Air, and send into the second flame district of coal dust firing, the volume ratio of steam and Secondary Air is 1:20, makes coal dust form combustion with meagre oxygen in burning second flame district, at suppression NO
xwhile generating, improve the seizure effect of carbon dioxide in flue gas;
The flue gas of S3, generation is isolated after dust through cyclone separator, carries out waste heat recovery, after gas cleaning, by compressibility, gas treatment is become Liquid segregation recovery CO wherein
2, remaining gas is discharged from chimney.
Wherein, First air oxygen-supplying amount is 79% of fuel combustion oxygen demand; Described Secondary Air oxygen-supplying amount is 21% of fuel combustion oxygen demand.
For reducing NO further
xdischarge, be in burning-out zone part at boiler furnace and be provided with reducing agent spray gun, reducing agent is sprayed into burning-out zone by reducing agent spray gun, and the reducing agent that spray gun sprays into is ammoniacal liquor or urea liquid.
Wherein, medium water is that water is put into heater, and the heat utilizing high-temperature flue gas to reclaim heats.
CO after above-mentioned steps purified treatment
2concentration be 91 ~ 92%.
Embodiment 2
Improve a combustion with meagre oxygen technique for carbon dioxide capture efficiency, shown in composition graphs 1, comprise the following steps:
S1, waste heat recovery is carried out to the high-temperature flue gas that boiler combustion produces, reclaim the heat that generates by the water vapour of medium water heating generation 225 ~ 230 DEG C;
S2, wherein a part of steam and First air are sent into the burner hearth of boiler, the volume ratio of steam and First air is 1:60, makes coal dust in the burning of burning first flame district and with eddy flow, coal dust is sent into the second flame district; Wherein a part of steam mixes with Secondary Air, and send into the second flame district of coal dust firing, the volume ratio of steam and Secondary Air is 1:40, makes coal dust form combustion with meagre oxygen in burning second flame district, at suppression NO
xwhile generating, improve the seizure effect of carbon dioxide in flue gas;
The flue gas of S3, generation is isolated after dust through cyclone separator, carries out waste heat recovery, after gas cleaning, by compressibility, gas treatment is become Liquid segregation recovery CO wherein
2, remaining gas is discharged from chimney.
Wherein, First air oxygen-supplying amount is 78% of fuel combustion oxygen demand; Described Secondary Air oxygen-supplying amount is 22% of fuel combustion oxygen demand.
For reducing NO further
xdischarge, be in burning-out zone part at boiler furnace and be provided with reducing agent spray gun, reducing agent is sprayed into burning-out zone by reducing agent spray gun, and the reducing agent that spray gun sprays into is ammoniacal liquor or urea liquid.
Wherein, medium water is that water is put into heater, and the heat utilizing high-temperature flue gas to reclaim heats.
CO after above-mentioned steps purified treatment
2concentration be 92 ~ 92.5%.
Embodiment 3
Improve a combustion with meagre oxygen technique for carbon dioxide capture efficiency, shown in composition graphs 1, comprise the following steps:
S1, waste heat recovery is carried out to the high-temperature flue gas that boiler combustion produces, reclaim the heat that generates by the water vapour of medium water heating generation 220 ~ 225 DEG C;
S2, wherein a part of steam and First air are sent into the burner hearth of boiler, the volume ratio of steam and First air is 1:40, makes coal dust in the burning of burning first flame district and with eddy flow, coal dust is sent into the second flame district; Wherein a part of steam mixes with Secondary Air, and send into the second flame district of coal dust firing, the volume ratio of steam and Secondary Air is 1.5:40, makes coal dust form combustion with meagre oxygen in burning second flame district, at suppression NO
xwhile generating, improve the seizure effect of carbon dioxide in flue gas;
The flue gas of S3, generation is isolated after dust through cyclone separator, carries out waste heat recovery, after gas cleaning, by separator pressure recovery CO wherein
2, remaining gas is discharged from chimney.
Wherein, First air oxygen-supplying amount is 75% of fuel combustion oxygen demand; Described Secondary Air oxygen-supplying amount is 25% of fuel combustion oxygen demand.
For reducing NO further
xdischarge, be in burning-out zone part at boiler furnace and be provided with reducing agent spray gun, reducing agent is sprayed into burning-out zone by reducing agent spray gun, and the reducing agent that spray gun sprays into is ammoniacal liquor or urea liquid.
Wherein, medium water is that water is put into heater, and the heat utilizing high-temperature flue gas to reclaim heats.
CO after above-mentioned steps purified treatment
2concentration be 90.0 ~ 90.5%.
Above content is in conjunction with concrete preferred embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention; make some equivalent alternative or obvious modification without departing from the inventive concept of the premise; and performance or purposes identical, all should be considered as belonging to the scope of patent protection that the present invention is determined by submitted to claims.
Claims (5)
1. improve a combustion with meagre oxygen technique for carbon dioxide capture efficiency, it is characterized in that comprising the following steps:
S1, waste heat recovery is carried out to the high-temperature flue gas that boiler combustion produces, reclaim the heat that generates by the water vapour of medium water heating generation 210 ~ 230 DEG C;
S2, wherein a part of steam and First air are sent into the burner hearth of boiler, the volume ratio of steam and First air is 1 ~ 2:60, makes coal dust in the burning of burning first flame district and with eddy flow, coal dust is sent into the second flame district; Wherein a part of steam mixes with Secondary Air, and send into the second flame district of coal dust firing, the volume ratio of steam and Secondary Air is 1 ~ 2:40, makes coal dust form combustion with meagre oxygen in burning second flame district, at suppression NO
xwhile generating, improve the seizure effect of carbon dioxide in flue gas;
The flue gas of S3, generation is isolated after dust through cyclone separator, carries out waste heat recovery, after gas cleaning, by compressibility, gas treatment is become Liquid segregation recovery CO wherein
2, remaining gas is discharged from chimney.
2. a kind of combustion with meagre oxygen technique improving carbon dioxide capture efficiency according to claim 1, is characterized in that:
Described First air oxygen-supplying amount is 75 ~ 79% of fuel combustion oxygen demand; Described Secondary Air oxygen-supplying amount is 21 ~ 25% of fuel combustion oxygen demand.
3. a kind of combustion with meagre oxygen technique improving carbon dioxide capture efficiency according to claim 2, is characterized in that:
Described First air oxygen-supplying amount is 78% of fuel combustion oxygen demand; Described Secondary Air oxygen-supplying amount is 22% of fuel combustion oxygen demand.
4. a kind of combustion with meagre oxygen technique improving carbon dioxide capture efficiency according to claim 1, is characterized in that:
Described boiler furnace is in burning-out zone part and is provided with reducing agent spray gun, and reducing agent is sprayed into burning-out zone and reduces NO by reducing agent spray gun
xdischarge.
5. a kind of combustion with meagre oxygen technique improving carbon dioxide capture efficiency according to claim 4, is characterized in that:
Described reducing agent is ammoniacal liquor or urea liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510755284.XA CN105351918A (en) | 2015-11-09 | 2015-11-09 | Lean oxygen combustion process for improving capture efficiency of carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510755284.XA CN105351918A (en) | 2015-11-09 | 2015-11-09 | Lean oxygen combustion process for improving capture efficiency of carbon dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105351918A true CN105351918A (en) | 2016-02-24 |
Family
ID=55327939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510755284.XA Pending CN105351918A (en) | 2015-11-09 | 2015-11-09 | Lean oxygen combustion process for improving capture efficiency of carbon dioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105351918A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111256152A (en) * | 2018-12-03 | 2020-06-09 | 光大绿色环保管理（深圳）有限公司 | Combustion device and method based on steam secondary air |
| CN113932216A (en) * | 2021-10-20 | 2022-01-14 | 北京航天迈未科技有限公司 | Carbon neutralization system based on pulverized coal boiler transformation and use method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865451A (en) * | 2010-05-24 | 2010-10-20 | 叶力平 | Biomass high-temperature flue gas gasification combination coal burning boiler and low-pollution combustion method thereof |
| CN103062787A (en) * | 2012-12-15 | 2013-04-24 | 华中科技大学 | Method and device for burning pulverized coal with self-heating oxygen generation function |
| CN103062745A (en) * | 2012-12-17 | 2013-04-24 | 华中科技大学 | Water vapor circularly adjusting type oxygen-enriched combustion method for pulverized coal boiler |
| CN103411209A (en) * | 2013-08-15 | 2013-11-27 | 陕西胜慧源信息科技有限公司 | Device and method for high-efficiency energy-saving combustion of low-heat value coal |
| WO2015019375A1 (en) * | 2013-08-09 | 2015-02-12 | Unicenergy S.R.L | Process for real time combustible gas production |
| US20150176487A1 (en) * | 2013-12-23 | 2015-06-25 | King Fahd University Of Petroleum And Minerals | Carbon-free low-nox liquid fuel oxygen transport rector for industrial water tube boilers |
-
2015
- 2015-11-09 CN CN201510755284.XA patent/CN105351918A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101865451A (en) * | 2010-05-24 | 2010-10-20 | 叶力平 | Biomass high-temperature flue gas gasification combination coal burning boiler and low-pollution combustion method thereof |
| CN103062787A (en) * | 2012-12-15 | 2013-04-24 | 华中科技大学 | Method and device for burning pulverized coal with self-heating oxygen generation function |
| CN103062745A (en) * | 2012-12-17 | 2013-04-24 | 华中科技大学 | Water vapor circularly adjusting type oxygen-enriched combustion method for pulverized coal boiler |
| WO2015019375A1 (en) * | 2013-08-09 | 2015-02-12 | Unicenergy S.R.L | Process for real time combustible gas production |
| CN103411209A (en) * | 2013-08-15 | 2013-11-27 | 陕西胜慧源信息科技有限公司 | Device and method for high-efficiency energy-saving combustion of low-heat value coal |
| US20150176487A1 (en) * | 2013-12-23 | 2015-06-25 | King Fahd University Of Petroleum And Minerals | Carbon-free low-nox liquid fuel oxygen transport rector for industrial water tube boilers |
Non-Patent Citations (1)
| Title |
|---|
| 吴占松等: "《煤炭清洁有效利用技术》", 31 July 2007, 化学工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111256152A (en) * | 2018-12-03 | 2020-06-09 | 光大绿色环保管理（深圳）有限公司 | Combustion device and method based on steam secondary air |
| CN113932216A (en) * | 2021-10-20 | 2022-01-14 | 北京航天迈未科技有限公司 | Carbon neutralization system based on pulverized coal boiler transformation and use method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103062745B (en) | Water vapor circularly adjusting type oxygen-enriched combustion method for pulverized coal boiler | |
| CN103234198B (en) | Microfine coal oxygen-enriched burning process and system | |
| CN105444582B (en) | A kind of combined and staged kiln exit gas processing unit and the process of burning of cement kiln bypass | |
| CN1959208A (en) | Boiler system of circulating fluid bed burning in oxygen enrichment | |
| CN204400906U (en) | Pulverized coal pyrolysis pollutant disposal system and boiler combustion system | |
| CN203810391U (en) | Novel ultra-low emission power generation system by burning low-calorific value fuel | |
| CN101839474A (en) | Method for re-circulating combustion of flue gas of pulverized coal fired boiler | |
| CN104864392A (en) | Total-oxygen coal powder MILD combustion method and device used by same | |
| CN105257350B (en) | A kind of low calorific value coal steam-hot-air association circulating power generation system | |
| CN109721259B (en) | Lime kiln hot air circulation system | |
| CN101907294A (en) | Low-NOx combustion method of cyclone furnace and liquid slag waste heat recycling system of cyclone furnace | |
| CN207122904U (en) | A kind of waste incinerator of low nitrogen burning | |
| CN206768039U (en) | A kind of biomass gasifying furnace of cogeneration of heat and power | |
| CN105222123A (en) | A kind of high-temperature oxygen-enriched formula overheat steam injection boiler | |
| CN200975664Y (en) | Oxygen-enriched combustion circulating fluid bed boiler system | |
| CN105371295A (en) | Method for utilizing water vapor for improving efficiency of capturing carbon dioxide in flue gas | |
| CN103900076B (en) | A kind of minimum discharge electricity generation system using low calorie fuels | |
| CN107559875B (en) | A kind of combustion gas method that gas furnace discharged nitrous oxides are effectively reduced | |
| CN105351918A (en) | Lean oxygen combustion process for improving capture efficiency of carbon dioxide | |
| CN105344200A (en) | Technology for raising capture efficiency of carbon dioxide in flue gas by utilization of water vapor | |
| CN105509038A (en) | Bubbling fluidized bed type O2/H20 pressurized oxygen-enriched combustion system | |
| CN202074532U (en) | High concentration salt bearing organic waste liquid incinerator | |
| WO2023226473A1 (en) | Cooperative utilization system for coal gangue power generation and co2 mineralization and working method | |
| CN101413674A (en) | Oxygen-enriched air mixed blowing combustion adjuvant boiler energy-saving method and employed equipment thereof | |
| CN102221198B (en) | Low NOx combustion method for cyclone furnace and liquid state slagging and afterheat recycling system for cyclone furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liang Jiefeng Inventor after: Yang Yun Inventor after: Li Jianhua Inventor before: Jiang Dong Inventor before: Huang Tian Inventor before: Liang Junzuo Inventor before: Liang Chenghan |
|
| COR | Change of bibliographic data | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160912 Address after: Starlake 530022 Nanning Road, the Guangxi Zhuang Autonomous Region No. 39 building 7 1 unit 3 floor No. 5 Applicant after: GUANGXI KUONENGBA ENERGY TECHNOLOGY DEVELOPMENT CO., LTD. Address before: Dong Ge road Nanning 530000 the Guangxi Zhuang Autonomous Region 24-8 building B unit B0606 real Kaifeng Applicant before: Guangxi Guisheng New Energy Science & Technology Co., Ltd. |
|
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160224 |
|
| RJ01 | Rejection of invention patent application after publication |