CN102980205A - Technology and device for cold-state ignition of low-emission boiler - Google Patents
Technology and device for cold-state ignition of low-emission boiler Download PDFInfo
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- CN102980205A CN102980205A CN2012104955489A CN201210495548A CN102980205A CN 102980205 A CN102980205 A CN 102980205A CN 2012104955489 A CN2012104955489 A CN 2012104955489A CN 201210495548 A CN201210495548 A CN 201210495548A CN 102980205 A CN102980205 A CN 102980205A
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Abstract
The invention relates to a technology and a device for cold-state ignition of a low-emission boiler. The technology is characterized in that one part of combustible gas generated during the preparation of active coke is delivered to the position where an ignition gun is located to be ignited, passed pulverized coal flow is ignited, pulverized coal mixture after being ignited is burnt in a boiler main burning area after being ignited, another part of the combustible gas is delivered to a boiler reburning area and is formed into reducing ambinent under the condition that the excess air coefficient is less than 1, nitric oxide generated in the boiler main burning area can be reduced, and thus the reburning denitration can be realized. According to the technology and the device, disclosed by the invention, the combustible gas generated by an active coke preparation furnace is ignited by the ignition gun, the ignition temperature of gas fuel is low, needed ignition heat is less, the gas fuel can be quickly ignited, the pulverized coal flow can be rapidly ignited, the purpose of low emission of nitric oxide can be realized at the same time, and the denitration efficiency can be up to 45%-65%.
Description
Technical field
The present invention relates to a kind of technique and device that utilizes byproduct in the activated coke preparation to carry out ignition of the boiler and denitration by refueling.
Background technology
Along with the development of Chinese national economy, the demand of the energy is increased day by day, and petroleum resources have been verified limited amount in China.At present, China all will spend a large amount of foreign exchange Imported oils every year.Power industry is the rich and influential family of fuel consume, according to electric power statistics in recent years: the Coal-fired group accounts for 74.8% of total installation of generating capacity, with oil mass about 2,330,000 tons, always with 31.9% of oil mass account for, mainly be ignition of the boiler combustion-supporting, stable combustion oil during with oil and underrun.In order to reduce the consumption of petroleum resources, it is extremely urgent to greatly develop thermal power plant's fuel-economizing new technology.
Though at present popular plasma ignition device be non-oil ignition, but complex structure, cost are higher, and easily wearing and tearing, slagging scorification in combustion barrel of coal dust, so that the increase of breeze airflow flow resistance is unfavorable for safe operation.Because of the plasma generator Power Limitation, when burning meager coal and anthracite, be difficult for igniting, combustion instability.
Simultaneously, can produce a large amount of oxides of nitrogen gas in thermal power plant's combustion process.Oxides of nitrogen gas not only stimulates people's respiratory system, and the infringement animals and plants damage the ozone layer, and are to cause one of greenhouse effects, acid rain and photochemically reactive main matter.Control oxides of nitrogen gas Production and emission is significant.
In addition, can produce a large amount of fuel gas in the activated coke preparation process, be mainly the mist of carbon monoxide, hydrogen and methane, calorific value is higher.This part fuel gas is realized recycling, can obtain larger economic benefit.
Therefore, need grease gun igniting and cost higher, the baroque plasma ignition device of a kind of new equipment in order to replace existing consumption great amount of fuel oil, and can realize the nitrogen oxide low emission, and take full advantage of the byproduct that produces in the activated coke preparation process, realize recycling.
Summary of the invention
The technique and the device that the purpose of this invention is to provide a kind of low emission boiler cold-state igniting, can not only realize the device of non-oil ignition, in order to grease gun igniting and higher, the baroque plasma ignition device of cost that replaces existing consumption great amount of fuel oil, and can realize the nitrogen oxide low emission, and take full advantage of the byproduct that produces in the activated coke preparation process.
The technical scheme that the present invention takes is:
A kind of technique of low emission boiler cold-state igniting, a fuel gas part that produces in the activated coke preparation is delivered to the igniting of burning torch place, the wind breeze airflow that will pass through is lighted, wind coal dust intermixture after lighting enters the burning of boiler primary zone, another part is delivered to the boiler reburning zone and is formed reducing atmosphere at excess air coefficient under less than 1 condition, the reduction of nitrogen oxide that the primary zone is produced is realized denitration by refueling.
The described fuel gas of delivering to the igniting of burning torch place accounts for 75% ~ 85% of total gas.
A kind of device of low emission boiler cold-state igniting, comprise that activated coke prepares stove, activated coke prepares furnace upper end and is provided with ignition gas carrier pipe and combustion gas body carrier pipe again, the outlet of ignition gas carrier pipe is located at the burning torch place, burning torch is located at locating near entering the boiler primary zone of a wind coal dust intermixture pipeline, boiler divides boiler primary zone, boiler reburning zone, boiler combustion exhausted district, and combustion gas body carrier pipe communicates with the boiler reburning zone again.
A described wind coal dust intermixture pipeline overcoat has the Secondary Air pipeline.
What burning torch of the present invention was lighted is that activated coke prepares the fuel gas that stove produces, the ignition temperature of gaseous fuel is low, required ignition heat is little, can quick ignition, breeze airflow ignites rapidly, make the timely stable ignition of breeze airflow, during especially for burning meager coal, anthracite, can realize that rapid-ignition starts.And the present invention compares with grease gun igniting and plasma ignition device, and burning torch is the common electrical sparking, and simple in structure, security is good.
The present invention can realize suppressing in the stove combustion process and the nitrogen oxides reduction discharging.On the one hand, do not affect catch fire and the prerequisite of coal dust drying under, because the ignition heat of gaseous fuel is less, can suitably reduce the wind wind-warm syndrome one time, can obviously reduce the discharge capacity of thermal NO.On the other hand, the combustion gas body passes into burner hearth reburning zone II by combustion gas body pipeline more again, forms reducing atmosphere at excess air coefficient under less than 1 condition, makes reduction of nitrogen oxide, realizes denitration by refueling.And, for subduing of nitrogen oxide, the gaseous fuel that hydrogen atoms is many is better than solid fuel, the fuel that the fuel ratio volatile matter that volatile matter is high is low is good, the hydrogen atoms amount is many in the fuel gas, and the nitrogen-atoms amount is few, therefore, the present invention can realize the purpose of nitrogen oxide low emission, and denitration efficiency can reach 45% ~ 65%.
Description of drawings
Fig. 1 is the structural representation of the device of low emission boiler cold-state igniting of the present invention.
Wherein: 1, activated coke prepares stove, and 2, combustion gas body carrier pipe again, 3, the ignition gas carrier pipe, 4, wind coal dust intermixture pipelines, 5, the Secondary Air pipeline, 6, burning torch, I, boiler combustion exhausted district, II, boiler reburning zone, III, boiler primary zone.
The specific embodiment
Further specify below in conjunction with accompanying drawing.
A kind of device of low emission boiler cold-state igniting, comprise that activated coke prepares stove 1, activated coke prepares stove 1 upper end and is provided with ignition gas carrier pipe 3 and combustion gas body carrier pipe 2 again, 3 outlets of ignition gas carrier pipe are located at burning torch 6 places, burning torch 6 is located at locating near entering the boiler primary zone of a wind coal dust intermixture pipeline 4, boiler divides boiler primary zone III, boiler reburning zone II, boiler combustion exhausted district I, and combustion gas body carrier pipe 2 communicates with boiler reburning zone II again.One time wind coal dust intermixture pipeline 4 overcoats have Secondary Air pipeline 5.
Prepare stove 1 gas out from activated coke and be divided into two parts, a part is ignition gas, account for 75% ~ 85% of total gas, enter burner by ignition gas carrier pipe 3, ignition gas carrier pipe 3 is arranged in wind pulverized coal channel 4, the ignition gas of ejection is lighted by burning torch 6, and the breeze airflow that ignites rapidly after the gas ignition is realized starting fast.Secondary Air mixes with the air-flow that catches fire in boiler primary zone III by Secondary Air pipeline 5, guarantees that coal dust fully burns.Another part is combustion gas body again, accounts for 15% ~ 25% of total gas, enters boiler reburning zone II by combustion gas body carrier pipe 2 again, forms reducing atmosphere at excess air coefficient under less than 1 condition, makes reduction of nitrogen oxide, realizes denitration by refueling.
Utilize activated coke to prepare that byproduct is lighted a fire and denitration by refueling method and device carry out the boiler cold-state ignition trigger, not only can start rapidly, simple in structure, security is good, the more important thing is and to save a large amount of fuel oils, reduce the consumption of petroleum resources, can also control the discharging of nitrogen oxide simultaneously and realize recycling, significant.
Claims (4)
1. the technique of low emission boiler cold-state igniting, it is characterized in that, a fuel gas part that produces in the activated coke preparation is delivered to the igniting of burning torch place, the wind breeze airflow that will pass through is lighted, wind coal dust intermixture after lighting enters the burning of boiler primary zone, another part is delivered to the boiler reburning zone and is formed reducing atmosphere at excess air coefficient under less than 1 condition, and the reduction of nitrogen oxide that the primary zone is produced is realized denitration by refueling.
2. the technique of a kind of low emission boiler cold-state igniting according to claim 1 is characterized in that, the described fuel gas of delivering to the igniting of burning torch place accounts for 75% ~ 85% of total gas.
3. the device of low emission boiler cold-state igniting, it is characterized in that, comprise that activated coke prepares stove, activated coke prepares furnace upper end and is provided with ignition gas carrier pipe and combustion gas body carrier pipe again, the outlet of ignition gas carrier pipe is located at the burning torch place, burning torch is located at locating near entering the boiler primary zone of a wind coal dust intermixture pipeline, and boiler divides boiler primary zone, boiler reburning zone, boiler combustion exhausted district, and combustion gas body carrier pipe communicates with the boiler reburning zone again.
4. the device of a kind of low emission boiler cold-state igniting according to claim 3 is characterized in that a described wind coal dust intermixture pipeline overcoat has the Secondary Air pipeline.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210495548.9A CN102980205B (en) | 2012-11-28 | 2012-11-28 | Technology and device for cold-state ignition of low-emission boiler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210495548.9A CN102980205B (en) | 2012-11-28 | 2012-11-28 | Technology and device for cold-state ignition of low-emission boiler |
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| CN102980205A true CN102980205A (en) | 2013-03-20 |
| CN102980205B CN102980205B (en) | 2014-10-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397768A (en) * | 2018-04-27 | 2018-08-14 | 重庆富燃科技股份有限公司 | A kind of device and method that coal gas is applied to coal-fired electric generation furnace |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5315939A (en) * | 1993-05-13 | 1994-05-31 | Combustion Engineering, Inc. | Integrated low NOx tangential firing system |
| CN1560512A (en) * | 2004-03-09 | 2005-01-05 | 江苏双良锅炉有限公司 | Boiler with preprocess function of automatic burning coke oven crude gas |
| CN101852427A (en) * | 2010-06-18 | 2010-10-06 | 华南理工大学 | Petroleum coke direct burner |
| CN202082935U (en) * | 2010-12-02 | 2011-12-21 | 上海德洲科技发展有限公司 | Ignitable industrial waste gas boiler |
| CN202927882U (en) * | 2012-11-28 | 2013-05-08 | 山东大学 | Cold state ignition device for low-emission boiler |
-
2012
- 2012-11-28 CN CN201210495548.9A patent/CN102980205B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5315939A (en) * | 1993-05-13 | 1994-05-31 | Combustion Engineering, Inc. | Integrated low NOx tangential firing system |
| CN1560512A (en) * | 2004-03-09 | 2005-01-05 | 江苏双良锅炉有限公司 | Boiler with preprocess function of automatic burning coke oven crude gas |
| CN101852427A (en) * | 2010-06-18 | 2010-10-06 | 华南理工大学 | Petroleum coke direct burner |
| CN202082935U (en) * | 2010-12-02 | 2011-12-21 | 上海德洲科技发展有限公司 | Ignitable industrial waste gas boiler |
| CN202927882U (en) * | 2012-11-28 | 2013-05-08 | 山东大学 | Cold state ignition device for low-emission boiler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108397768A (en) * | 2018-04-27 | 2018-08-14 | 重庆富燃科技股份有限公司 | A kind of device and method that coal gas is applied to coal-fired electric generation furnace |
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| CN102980205B (en) | 2014-10-08 |
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