CN106838861A - A kind of burning of coal technique and its combustion furnace - Google Patents
A kind of burning of coal technique and its combustion furnace Download PDFInfo
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- CN106838861A CN106838861A CN201510871929.6A CN201510871929A CN106838861A CN 106838861 A CN106838861 A CN 106838861A CN 201510871929 A CN201510871929 A CN 201510871929A CN 106838861 A CN106838861 A CN 106838861A
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Abstract
A kind of burning of coal technique and its combustion furnace, equipment of the invention is reacted with bunker coal using pure oxygen, using the ignition temperature in burner hearth tiny structure control burner hearth, it is to avoid energy loss that flue gas recirculation is caused and more serious to the abrasion of furnace wall because circulating；Compared to current CFBB, IGCC and oxygen-enriched burning process, equipment investment is small, and floor space is small, and simple structure, ignition temperature is high, the advantages of environment and smaller carbon emission.
Description
Technical field
The present invention relates to a kind of burning of coal technique and its combustion furnace.
Background technology
Present boiler main will use CFBB, and cycle efficieny is low；IGCC needs first to gasify after generation fuel gas is purified and enters internal combustion engine, and equipment is complicated, and investment is high.Because oxygen ability manufacturing cost is higher, at present using oxygen-enriched combusting, oxygen-enriched combusting is with than usual air（Oxygen-containing 21%）Oxygen concentration oxygen-enriched air high is burnt, and for control furnace flame temperature and maintains suitable heat-transfer character, it is necessary to partial fume is recycled, and NOX is produced while so not only increasing circulator and burning.
The innovation of current oxygenerating technology, the drop bottom of oxygen cost processed.Equipment of the invention is reacted with bunker coal using pure oxygen, using the ignition temperature in burner hearth tiny structure control burner hearth, it is to avoid energy loss that flue gas recirculation is caused and more serious to the abrasion of furnace wall because circulating；Compared to current CFBB, IGCC and oxygen-enriched burning process, equipment investment is small, and floor space is small, and simple structure, ignition temperature are high, the advantages of environment and smaller carbon emission.
The content of the invention
The present invention is exactly to solve to provide a kind of burning of coal technique and its combustion furnace, reacted with bunker coal using pure oxygen, using the ignition temperature in burner hearth tiny structure control burner hearth, it is to avoid energy loss that flue gas recirculation is caused and because circulating the technical problem more serious to the abrasion of furnace wall.
In order to solve the above technical problems, the technical solution of a kind of burning of coal technique of the invention and its combustion furnace is：
Burning of coal technique of the present invention, comprises the following steps：
The first step, coal is layered in carbon residue combustion chamber；Boiler feedwater enters feedwater preheater, and the heat exchange pipeline of water-cooling wall makes pipeline keep water-filling state, the emptying of steam evacuation valve；Returning charge valve closing；
Second step：Lead to plant air from oxygen jet, open air-introduced machine and ensure pressure-fired in burner hearth.
3rd step：With going into operation, stove middle portion temperature is promoted to 750 DEG C by coal gas, and furnace bottom temperature is promoted to 650 ~ 850 DEG C；Enter coal from raw coal conduit, the coal gas that goes into operation is closed after most coals in stove are ignite, the temperature of combustion furnace is controlled at 800 ~ 900 DEG C by adding and subtracting coal, ensure stove in accumulation of heat and culture the bed of material after, steam is sprayed into through oxygen jet, the gas in replacement combustion room treats that furnace bottom temperature is down to 800 or so, lentamente send pure oxygen, it is ensured that the oxygen content in combustion chamber；Fire box temperature is maintained 900 ~ 950 DEG C and while regulating and guiding blower fan by regulation furnace coal weight, it is ensured that burner hearth tiny structure, furnace roof is adjusted according to vapor (steam) temperature；Water in pipeline is delivered to boiler feedwater distributor and is sent to flying dust collection and heat recovery room and combustion chamber water-cooling wall after being preheated through feedwater preheater and lime-ash carbon residue combustion chamber, after combustion chamber, the steam that flying dust is collected and heat recovery room water-cooling wall is produced enter superheat section and steam collects buffer reheating, high temperature and high pressure steam is produced for users to use；
4th step：Continuously enter coal to drying machine, tail gas is entered into drying machine by the extraction of air-introduced machine and coal is dried, and dedusting is carried out to dried tail gas, washing, desulfurization；
5th step：The dried coal of drying machine is sent to raw material cabin, controls to add the amount of the feed coal of combustion furnace by raw material cabin；
6th step：Ash material collector has certain flying dust to gather materials, and adjusts returning charge amount, it is ensured that returning charge amount is balanced with flying dust yield；
7th step：After there is certain piling height carbon residue combustion chamber, ash-slag disposal system is opened, slowly discharge certain lime-ash, it is ensured that lime-ash is balanced.
3rd step ensures oxygen content in combustion chamber between 85% to 100%.
3rd step ensures that the oxygen content in combustion chamber is 95%.
For a kind of a kind of combustion furnace of burning process, including lagging casing and coal feeding pipe road, three bins are provided with the lagging casing, lime-ash carbon residue combustion chamber respectively positioned at bottom, the combustion chamber communicated on lime-ash carbon residue combustion chamber and with lime-ash carbon residue combustion chamber and flying dust are collected and heat recovery room；Communicated by ash material collector between the lime-ash carbon residue combustion chamber and flying dust collection and heat recovery room；The lime-ash carbon residue combustion chamber outside is provided with the boiler feedwater preheating heat exchanger for being provided with water inlet；The lime-ash carbon residue bottom of combustion chamber is provided with ignition system and oxygen feeding tube road；The combustion chamber outside is with one layer of water-cooling wall；The water-cooling wall is provided with intercommunicating pore makes combustion chamber be communicated with flying dust collection and heat recovery room；Water-cooling wall downside is connected with boiler feedwater distributor；The boiler feedwater distributor is connected with boiler feedwater preheating heat exchanger；One vapor collection buffer is arranged on combustion chamber upper end and is connected with water-cooling wall；The coal feeding pipe road is communicated with combustion chamber, and its coal feed point is located at lagging casing outside；The flying dust is collected and heat recovery room is provided with the combustion tail gas pipeline communicated with itself；The combustion tail gas pipeline other end is located at lagging casing outside and is connected with air-introduced machine.
What the present invention can reach has the technical effect that：The present invention is reacted with bunker coal using pure oxygen, using the ignition temperature in burner hearth tiny structure control burner hearth, it is to avoid energy loss that flue gas recirculation is caused and more serious to the abrasion of furnace wall because circulating；Compared to CFBB and IGCC, equipment investment is small, and floor space is small, and simple structure, ignition temperature are high, the advantages of environment and smaller carbon emission.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description：
Fig. 1 is a kind of structural representation of combustion furnace of the invention；
Fig. 2 is the top view that Fig. 1 is not drawn into exhaust pipe and coal feeding pipe road；
Fig. 3 is the A-A profiles of Fig. 1；
Fig. 4 is a kind of process chart of burning of coal technique of the invention.
Specific embodiment
Make further details of elaboration to the present invention below in conjunction with the accompanying drawings.
Refering to Fig. 1 to Fig. 4.
A kind of burning of coal technique of implementation method one, comprises the following steps：
The first step, coal is layered in carbon residue combustion chamber；Boiler feedwater enters feedwater preheater, and the heat exchange pipeline of water-cooling wall makes pipeline keep water-filling state, the emptying of steam evacuation valve；Returning charge valve closing；
Second step：Lead to plant air from oxygen jet, open air-introduced machine and ensure pressure-fired in burner hearth.
3rd step：With going into operation, stove middle portion temperature is promoted to 750 DEG C by coal gas, and furnace bottom temperature is promoted to 650 ~ 850 DEG C；Enter coal from raw coal conduit, the coal gas that goes into operation is closed after most coals in stove are ignite, the temperature of combustion furnace is controlled at 800 ~ 900 DEG C by adding and subtracting coal, ensure stove in accumulation of heat and culture the bed of material after, steam is sprayed into through oxygen jet, the gas in replacement combustion room treats that furnace bottom temperature is down to 800 or so, lentamente send pure oxygen, it is ensured that the oxygen content in combustion chamber；Fire box temperature is maintained 900 ~ 950 DEG C and while regulating and guiding blower fan by regulation furnace coal weight, it is ensured that burner hearth tiny structure, furnace roof is adjusted according to vapor (steam) temperature；Water in pipeline is delivered to boiler feedwater distributor and is sent to flying dust collection and heat recovery room and combustion chamber water-cooling wall after being preheated through feedwater preheater and lime-ash carbon residue combustion chamber, after combustion chamber, the steam that flying dust is collected and heat recovery room water-cooling wall is produced enter superheat section and steam collects buffer reheating, high temperature and high pressure steam is produced for users to use；
4th step：Continuously enter coal to drying machine, tail gas is entered into drying machine by the extraction of air-introduced machine and coal is dried, and dedusting is carried out to dried tail gas, washing, desulfurization；
5th step：The dried coal of drying machine is sent to raw material cabin, controls to add the amount of the feed coal of combustion furnace by raw material cabin；
6th step：Ash material collector has certain flying dust to gather materials, and adjusts returning charge amount, it is ensured that returning charge amount is balanced with flying dust yield；
7th step：After there is certain piling height carbon residue combustion chamber, ash-slag disposal system is opened, slowly discharge certain lime-ash, it is ensured that lime-ash is balanced.
Implementation method two, based on implementation method one, preferably, the 3rd step ensures oxygen content in combustion chamber between 85% to 100%.
Implementation method three, based on implementation method two, preferably, the 3rd step ensures that the oxygen content in combustion chamber is 95%.
Implementation method four, for a kind of a kind of combustion furnace of the burning process described in implementation method one, including lagging casing 13 and coal feeding pipe road 7, three bins are provided with the lagging casing 13, lime-ash carbon residue combustion chamber 3 respectively positioned at bottom, the combustion chamber 6 communicated on lime-ash carbon residue combustion chamber 3 and with lime-ash carbon residue combustion chamber 3 and flying dust are collected and heat recovery room 4；Communicated by ash material collector 22 between the lime-ash carbon residue combustion chamber 3 and flying dust collection and heat recovery room 4；The outside of the lime-ash carbon residue combustion chamber 3 is provided with the boiler feedwater preheating heat exchanger 2 for being provided with water inlet；The bottom of lime-ash carbon residue combustion chamber 3 is provided with ignition system 17 and oxygen feeding tube road 1；The outside of the combustion chamber 6 is with one layer of water-cooling wall 8；The water-cooling wall 8 is provided with intercommunicating pore 9 makes combustion chamber 6 be communicated with flying dust collection and heat recovery room 4；The downside of water-cooling wall 8 is connected with boiler feedwater distributor 15；The boiler feedwater distributor 15 is connected with boiler feedwater preheating heat exchanger 2；One vapor collection buffer 10 is arranged on the upper end of combustion chamber 3 and is connected with water-cooling wall 8；The coal feeding pipe road 7 is communicated with combustion chamber 6, and its coal feed point is located at the outside of lagging casing 13；The flying dust is collected and heat recovery room 4 is provided with the combustion tail gas pipeline 5 communicated with itself；The other end of combustion tail gas pipeline 5 is located at the outside of lagging casing 13 and is connected with air-introduced machine 14.
Implementation method five, based on implementation method four, preferably, the boiler feedwater preheating heat exchanger 2 is a pipeline for being spirally wound on lime-ash carbon residue combustion chamber 3；The pipeline is connected with boiler feedwater preheating heat exchanger 2.
Implementation method six, based on implementation method four, preferably, the water-cooling wall 8 is made up of vertical tube 11 and dividing plate 12；The vertical tube 11 is connected with boiler feedwater preheating heat exchanger 2；Dividing plate 12 is provided with intercommunicating pore 9.
Flying dust is collected and heat recovery room 4 acts on：Collected and heat recovery ceiling portion in flying dust, 900 ~ 500 DEG C higher top temperature than combustion chamber of flue-gas temperature are slightly lower（But superheated steam is heated enough）, the temperature of flue gas body is gradually reduced from top to bottom, and because flue gas is more long in the region residence time, the boiler heat exchange effect with outer barrel is preferable, and weight particle flying dust is surveyed in dropping to revert system in this regional gravity and along gas direction；The different guarantee gases of ability according to burning symmetrically open offgas outlet in the indoor Uniform Flow in the surrounding of equipment, about 200 DEG C ~ 300 DEG C or so of outlet temperature, and ensure that outlet has certain angle obliquely, if so in revert system is flowed to after the flying dust of exhaust pipe can also collect.
Ash material collector 22：The flying dust of collection is being stored in tapered ash material collector, primarily serves sealing because of revert system and the UNICOM of combustion chamber, it is to avoid because UNICOM causes gas short circuit, cause the accident, and play a part of to collect flying dust.The region is counted greatly as pouring material builds up absolutely
Revert system 16 can also be added in the present invention：Control returning charge amount, allows the unburned carbon residue of flying dust to be burnt away into lime-ash carbon residue combustion chamber 3, while reclaiming the heat energy of flying dust.
Drying system：Contain substantial amounts of latent heat in tail gas, direct contact heat transfer is carried out with the bunker coal that adverse current is come in this region, the basic outer water for removing bunker coal.
The effect of raw material cabin：The effect of raw material cabin two, one is that a number of feed coal of storage is used for combustion furnace, while playing contacting for sealed combustion chamber and drying system；
The Main Function of boiler feedwater distributor 15：Balance boiler causes the vapor (steam) temperature for producing different because of temperature difference, it is ensured that the place of water-cooling wall high-temperature produces saturated vapor and superheated steam, and the part of low temperature is played preheating and produces saturated vapor, sufficiently absorbs all heat energy of the equipment.
Coal feeding pipe road 7：The fuel of predominantly continuous supply combustion furnace, the pipeline external uses water-cooling wall 8, the temperature of coal can be made to reach 300 DEG C or so with pre-heating fuel coal, be conducive to raw material burning of coal, also ensure that raw material will not be because collecting and the heat recovery room 4 and temperature of combustion chamber 6 is too high makes coal line clogging caused by the destructive distillation of coal feeding pipe road 7, while the material in coal feeding pipe road 7 can be reduced by flying dust simultaneously.
Steam collects buffer 10：Play collect combustion furnace in absorb heat water-cooling wall 8 produce high steam and play cushioning effect, while the collection buffer 10 constitute combustion furnace top, fully absorb combustion furnace heat reach overheat and stationary temperature effect.
Claims (6)
1. a kind of burning of coal technique, it is characterised in that comprise the following steps：
The first step, coal is layered in carbon residue combustion chamber；Boiler feedwater enters feedwater preheater, and the heat exchange pipeline of water-cooling wall makes pipeline keep water-filling state, the emptying of steam evacuation valve；Returning charge valve closing；
Second step：Lead to plant air from oxygen jet, open air-introduced machine and ensure pressure-fired in burner hearth；
3rd step：With going into operation, stove middle portion temperature is promoted to 750 DEG C by coal gas, and furnace bottom temperature is promoted to 650 ~ 850 DEG C；Enter coal from raw coal conduit, the coal gas that goes into operation is closed after most coals in stove are ignite, the temperature of combustion furnace is controlled at 800 ~ 900 DEG C by adding and subtracting coal, ensure stove in accumulation of heat and culture the bed of material after, steam is sprayed into through oxygen jet, the gas in replacement combustion room treats that furnace bottom temperature is down to 800 or so, lentamente send pure oxygen, it is ensured that the oxygen content in combustion chamber；Fire box temperature is maintained 900 ~ 950 DEG C and while regulating and guiding blower fan by regulation furnace coal weight, it is ensured that burner hearth tiny structure, furnace roof is adjusted according to vapor (steam) temperature；Water in pipeline is delivered to boiler feedwater distributor and is sent to flying dust collection and heat recovery room and combustion chamber water-cooling wall after being preheated through feedwater preheater and lime-ash carbon residue combustion chamber, after combustion chamber, the steam that flying dust is collected and heat recovery room water-cooling wall is produced enter superheat section and steam collects buffer reheating, high temperature and high pressure steam is produced for users to use；
4th step：Continuously enter coal to drying machine, tail gas is entered into drying machine by the extraction of air-introduced machine and coal is dried, and dedusting is carried out to dried tail gas, washing, desulfurization；
5th step：The dried coal of drying machine is sent to raw material cabin, controls to add the amount of the feed coal of combustion furnace by raw material cabin；
6th step：Ash material collector has certain flying dust to gather materials, and adjusts returning charge amount, it is ensured that returning charge amount is balanced with flying dust yield；
7th step：After there is certain piling height carbon residue combustion chamber, ash-slag disposal system is opened, slowly discharge certain lime-ash, it is ensured that lime-ash is balanced.
2. a kind of burning process according to claim 1, it is characterised in that：3rd step ensures oxygen content in combustion chamber between 85% to 100%.
3. a kind of burning process according to claim 2, it is characterised in that：3rd step ensures that the oxygen content in combustion chamber is 95%.
4. a kind of a kind of combustion furnace of the burning process being used for described in claim 1, including lagging casing（13）And coal feeding pipe road（7）, it is characterised in that：The lagging casing（13）Three bins are inside provided with, respectively positioned at the lime-ash carbon residue combustion chamber of bottom（3）, positioned at lime-ash carbon residue combustion chamber（3）It is upper and with lime-ash carbon residue combustion chamber（3）The combustion chamber for communicating（6）And flying dust is collected and heat recovery room（4）；The lime-ash carbon residue combustion chamber（3）Collected with flying dust and heat recovery room（4）Between pass through ash material collector（22）Communicate；The lime-ash carbon residue combustion chamber（3）Outside is provided with the boiler feedwater preheating heat exchanger for being provided with water inlet（2）；The lime-ash carbon residue combustion chamber（3）Bottom is provided with ignition system（17）And oxygen feeding tube road（1）；The combustion chamber（6）Outside is with one layer of water-cooling wall（8）；The water-cooling wall（8）It is provided with intercommunicating pore（9）Make combustion chamber（6）Collected with flying dust and heat recovery room（4）Communicate；Water-cooling wall（8）Downside is connected with boiler feedwater distributor（15）；The boiler feedwater distributor（15）With boiler feedwater preheating heat exchanger（2）Connection；One vapor collection buffer（10）Installed in combustion chamber（3）Upper end and and water-cooling wall（8）Connection；The coal feeding pipe road（7）With combustion chamber（6）Communicate, its coal feed point is located at lagging casing（13）Outside；The flying dust is collected and heat recovery room（4）It is provided with the combustion tail gas pipeline (5) communicated with itself；The combustion tail gas pipeline（5）The other end is located at lagging casing（13）Outside and and air-introduced machine（14）Connection.
5. a kind of combustion furnace according to claim 4, it is characterised in that：The boiler feedwater preheating heat exchanger（2）Lime-ash carbon residue combustion chamber is spirally wound on for one（3）Pipeline；The pipeline and boiler feedwater preheating heat exchanger（2）Connection.
6. a kind of combustion furnace according to claim 4, it is characterised in that：The water-cooling wall（8）By vertical tube（11）And dividing plate（12）Constitute；The vertical tube（11）With boiler feedwater preheating heat exchanger（2）Connection；Dividing plate（12）It is provided with intercommunicating pore（9）.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109002687A (en) * | 2018-08-02 | 2018-12-14 | 国家能源投资集团有限责任公司 | The method of the lime-ash share of circulating fluidized bed boiler is determined based on calcium balance |
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| CN2086376U (en) * | 1990-07-04 | 1991-10-09 | 李水生 | Multi-layer blast chamber formed coal boiler |
| CA2096323A1 (en) * | 1992-05-22 | 1993-11-23 | Ernest Ludwig Daman | Staged furnaces for firing coal pyrolysis gas and char |
| CN1916490A (en) * | 2006-08-15 | 2007-02-21 | 周开根 | Smokeless burning technique and equipment with fire fontanel being setup inside furnace |
| CN101038106A (en) * | 2007-05-15 | 2007-09-19 | 李玉臣 | Vertical atmospheric superconductive quick heat supply boiler |
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2015
- 2015-12-03 CN CN201510871929.6A patent/CN106838861B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2086376U (en) * | 1990-07-04 | 1991-10-09 | 李水生 | Multi-layer blast chamber formed coal boiler |
| CA2096323A1 (en) * | 1992-05-22 | 1993-11-23 | Ernest Ludwig Daman | Staged furnaces for firing coal pyrolysis gas and char |
| CN1916490A (en) * | 2006-08-15 | 2007-02-21 | 周开根 | Smokeless burning technique and equipment with fire fontanel being setup inside furnace |
| CN1916490B (en) * | 2006-08-15 | 2012-07-04 | 周开根 | Smokeless burning technique and equipment with fire fontanel being setup inside furnace |
| CN101038106A (en) * | 2007-05-15 | 2007-09-19 | 李玉臣 | Vertical atmospheric superconductive quick heat supply boiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109002687A (en) * | 2018-08-02 | 2018-12-14 | 国家能源投资集团有限责任公司 | The method of the lime-ash share of circulating fluidized bed boiler is determined based on calcium balance |
| CN109002687B (en) * | 2018-08-02 | 2020-12-01 | 国家能源投资集团有限责任公司 | Method for determining ash share of circulating fluidized bed boiler based on calcium balance |
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| CN106838861B (en) | 2019-04-12 |
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Effective date of registration: 20211213 Address after: Songlin community, Huashan street, Zhanyi District, Qujing City, Yunnan Province Patentee after: YUNNAN DAWEI COKE Co.,Ltd. Address before: 655000 No. 1, floor 1, building 20, Huashan Road, Panjiang Town, Zhanyi County, Qujing City, Yunnan Province Patentee before: Yan Tingshu |