CN100383457C - Using method of fired coal boiler - Google Patents
Using method of fired coal boiler Download PDFInfo
- Publication number
- CN100383457C CN100383457C CNB2006100133013A CN200610013301A CN100383457C CN 100383457 C CN100383457 C CN 100383457C CN B2006100133013 A CNB2006100133013 A CN B2006100133013A CN 200610013301 A CN200610013301 A CN 200610013301A CN 100383457 C CN100383457 C CN 100383457C
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- air
- coal
- air output
- plenum chamber
- boiler
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Abstract
The present invention discloses a using method of coal fired boilers to provide a using method of coal fired boilers, which delays blowing, has small blowing amount and can cause fuel to be sufficiently combusted. The using method is characterized in that under the state that micro negative pressure is kept in a boiler, a draught fan is used for induced draft according to 1/20 to 1/4 of rated induced draft amount; coal is combusted and orderly passes through a blowing chamber; a blower is arranged in the blowing chamber at the middle back part of the boiler for blowing and has the blowing amount accounting for 1/20 to 1/4 of rated blowing amount. The using method of the present invention causes coal combustion to be carried out according to a water evaporation process, a chemical substance evaporation process, a carbon combustion process and an unburnt large granule carbon combustion process, avoids the phenomena of coking and nodulation caused by surface combustion, causes coal to be sufficiently combusted and saves fuel; because of small blowing amount, the hearth of boilers has high temperature, and electric energy can be saved; simultaneously, the service life of devices is extended, the corrosion of chemical substances to devices is reduced and the service life of boiler system devices is extended.
Description
Technical field
The present invention relates to a kind of using method of boiler, in particular, relate to a kind of employing and reduce air output, postpone air-supply, reach the using method of the coal-burning boiler of energy savings in the mode of postponing burning.
Background technology
At present, chain coal burning boiler is widely used in heating system, becomes with coal, large electricity consumer.The using method of existing boiler is: the kettleman opens air-introduced machine and air blast by specified air output when boiler combustion.Because specified air output is bigger, a large amount of cold wind enters in the burner hearth, influences the temperature in the burner hearth, makes the coal surface combustion easily, form dross, coking phenomenon, and coal cinder is wrapped partly, can not fully burn, and heat output of fuel is low, and heating efficiency is low.And because wind is big, granule carbon causes the waste of coal resource along with fugitive constituent is discharged.And because air output is big, the electric energy of consumption is many, makes that also the service life of equipment is short.
Summary of the invention
The present invention is in order to overcome weak point of the prior art, and a kind of delay air-supply is provided, and air output is little, can make the using method of the coal-burning boiler of full combustion of fuel.
The present invention is achieved through the following technical solutions:
A kind of using method of coal-burning boiler is characterized in that, is under the micro-vacuum state in keeping boiler, passes through air-introduced machine air inducing by 1/20～1/4 of specified air inducing amount; Coal combustion also passes through plenum chamber successively, and air blast is in the postmedian plenum chamber air-supply of boiler, and air output is 1/20～1/4 of a specified air output.
The pressure of described little negative pressure is-5～-15 handkerchiefs.
The air output mean allocation of a plurality of middle parts plenum chamber, the air output summation of middle part plenum chamber is 1/15 of a specified air output; The air output mean allocation of a plurality of rear portions plenum chamber, the air output summation of rear portion plenum chamber is 1/30 of a specified air output.
The preheat temperature of coal is 300-800 ℃ before the air blast air-supply.
The present invention has following technique effect:
The using method of boiler of the present invention, air inducing amount and air output are little, blow at the postmedian plenum chamber, and the air output of middle part plenum chamber makes burning of coal carry out according to water evaporates, chemical substance evaporation, carbon burning, four processes of unburnt bulky grain carbon burning greater than the air output of rear portion plenum chamber, has avoided surface combustion to form the phenomenon of coking, dross, coal is fully burnt, the caloric value height, the heating efficiency height has been saved fuel.And because air output is little, the fire box temperature height can saves energy, simultaneously, because the workload of air-introduced machine and air blast has prolonged the service life of equipment less than the nominal operation amount.And chemical substance is fully evaporated, and has reduced the corrosion of chemical substance to equipment, has prolonged the service life of steam generator system equipment.
The specific embodiment
Below in conjunction with specific embodiment to the detailed description of the invention.
Behind the boiler coal, blow in burner hearth according to 1/20～1/4 of specified air output by air-introduced machine.In keeping boiler is under the micro-vacuum state, and coal combustion also passes through each plenum chamber successively, and air blast is in the postmedian plenum chamber air-supply of boiler, and air output is 1/20～1/4 of a specified air output.The pressure of general little negative pressure is-5～-15 handkerchiefs.The air output mean allocation of a plurality of middle parts plenum chamber, the air output summation of middle part plenum chamber is 1/15 of a specified air output.The air output mean allocation of a plurality of rear portions plenum chamber, the air output summation of rear portion plenum chamber is 1/30 of a specified air output.For better energy savings, before the air blast air-supply, the preheat temperature of coal is preferably between 300～800 ℃, so that chemical substance is fully volatilized.
Chain coal burning boiler with 6 plenum chambers is that example is to the detailed description of the invention below.
Behind the boiler coal, blow in burner hearth according to 1/10 of specified air output by air-introduced machine.In keeping boiler is under-5～-15 handkerchief micro-vacuum states, and coal combustion also passes through each plenum chamber successively, and air blast is in the postmedian plenum chamber air-supply of boiler, and air output is 1/10 of a specified air output.For the chain coal burning boiler of 6 plenum chambers, 1,2 plenum chambers are anterior plenum chamber, and 3,4 plenum chambers are the middle part plenum chamber, and 5,6 plenum chambers are the rear portion plenum chamber.The air output summation of middle part 3,4 plenum chambers is the air output mean allocation of 1/15,3,4 plenum chambers of specified air output, and the air output summation of rear portion 5,6 plenum chambers is the air output mean allocation of 1/30,5,6 plenum chambers of specified air output.The temperature of coal preheating is 300～800 ℃ before the air blast air-supply.
For the chain coal burning boiler of 4 plenum chambers, 1 plenum chamber is anterior plenum chamber, and 2,3 plenum chambers are the middle part plenum chamber, and 4 plenum chambers are the rear portion plenum chamber.The air output summation of middle part 2,3 plenum chambers is the air output mean allocation of 1/15,2,3 plenum chambers of specified air output, and the air output summation of rear portion 4 plenum chambers is 1/30 of a specified air output.
For the chain coal burning boiler of 8 plenum chambers, 1,2,3 plenum chambers are anterior plenum chamber, and 4,5,6 plenum chambers are the middle part plenum chamber, and 7,8 plenum chambers are the rear portion plenum chamber.The air output summation of middle part 4,5,6 plenum chambers is the air output mean allocation of 1/15,4,5,6 plenum chambers of specified air output, and the air output summation of rear portion 7,8 plenum chambers is the air output mean allocation of 1/30,7,8 plenum chambers of specified air output.
In boiler combustion process, with slag notch not the show coal be as the criterion, if slag notch finds that anthracite is arranged, because fully burning, do not cause in coal, should strengthen the air output of air blast and adjust, general adjusting range is 1/20～1/4, till not having anthracite to occur.
It is wet coal that coal is added in the boiler, coal water evaporates under the action of high temperature in burner hearth.After the water evaporates, various chemical substance evaporations.Air-supply makes volatile matter that the sufficient volatilization time be arranged during fire box temperature to 300～800 ℃.After the volatile matter volatilization, the air-supply of middle part plenum chamber, carbon burning.At the unburnt bulky grain carbon of rear portion plenum chamber after-flame, avoid producing coking phenomenon, simultaneously, also avoid unburnt anthracite to discharge, to reduce coal consumption from slag notch.Air output is more little, and furnace temperature is high more, economizes on coal, electric energy is high more, generally can economize on coal 10～40%, economize on electricity 50～90%.
Although the disclosed using method that relates to a kind of coal-burning boiler has been carried out special description with reference to embodiment, embodiment described above is illustrative and not restrictive, under the situation that does not break away from the spirit and scope of the present invention, all variations and modification are all within the scope of the present invention.
Claims (4)
1. the using method of a chain coal burning boiler is characterized in that, is under the micro-vacuum state in keeping boiler, passes through air-introduced machine air inducing by 1/20～1/4 of specified air inducing amount; Coal combustion also passes through plenum chamber successively, and air blast is in the postmedian plenum chamber air-supply of boiler, and air output is 1/20～1/4 of a specified air output.
2. the using method of chain coal burning boiler according to claim 1 is characterized in that, the pressure of described little negative pressure is-5～-15 handkerchiefs.
3. the using method of chain coal burning boiler according to claim 1 is characterized in that, the air output mean allocation of a plurality of middle parts plenum chamber, and the air output summation of middle part plenum chamber is 1/15 of a specified air output; The air output mean allocation of a plurality of rear portions plenum chamber, the air output summation of rear portion plenum chamber is 1/30 of a specified air output.
4. the using method of chain coal burning boiler according to claim 1 is characterized in that, the preheat temperature of coal is 300～800 ℃ before the air blast air-supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100133013A CN100383457C (en) | 2006-03-14 | 2006-03-14 | Using method of fired coal boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100133013A CN100383457C (en) | 2006-03-14 | 2006-03-14 | Using method of fired coal boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1818473A CN1818473A (en) | 2006-08-16 |
| CN100383457C true CN100383457C (en) | 2008-04-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100133013A Expired - Fee Related CN100383457C (en) | 2006-03-14 | 2006-03-14 | Using method of fired coal boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN100383457C (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86200461U (en) * | 1986-02-06 | 1987-02-25 | 弓敬之 | Disposing air plant for chain boiler |
| JP2003004217A (en) * | 2001-06-20 | 2003-01-08 | Masayuki Takahashi | Discarded tire burning boiler |
| CN1424538A (en) * | 2002-12-30 | 2003-06-18 | 上海交通大学 | Blowing system of chain boiler with sectorial blow homogenating plate |
-
2006
- 2006-03-14 CN CNB2006100133013A patent/CN100383457C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86200461U (en) * | 1986-02-06 | 1987-02-25 | 弓敬之 | Disposing air plant for chain boiler |
| JP2003004217A (en) * | 2001-06-20 | 2003-01-08 | Masayuki Takahashi | Discarded tire burning boiler |
| CN1424538A (en) * | 2002-12-30 | 2003-06-18 | 上海交通大学 | Blowing system of chain boiler with sectorial blow homogenating plate |
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| Publication number | Publication date |
|---|---|
| CN1818473A (en) | 2006-08-16 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080423 Termination date: 20120314 |