CN102506405A - Reciprocating grate boiler for medium-high voltage power station - Google Patents
Reciprocating grate boiler for medium-high voltage power station Download PDFInfo
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- CN102506405A CN102506405A CN2011102839370A CN201110283937A CN102506405A CN 102506405 A CN102506405 A CN 102506405A CN 2011102839370 A CN2011102839370 A CN 2011102839370A CN 201110283937 A CN201110283937 A CN 201110283937A CN 102506405 A CN102506405 A CN 102506405A
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Abstract
The invention relates to a reciprocating grate boiler, in particular to a reciprocating grate boiler for a medium-high voltage power station, which aims to solve the problems of high power consumption of pretreatment, high power consumption of running, high concentration of dust generated after combustion, small particle diameter of the dust, environmental pollution, and high initial investment and running cost of flue gas purification equipment of existing fluidized bed equipment. The reciprocating grate boiler comprises a boiler body, a coal bucket, a grate, a water-cooled wall, an upper boiler barrel, a steam superheater, a vertical flue and a cast-iron economizer, a hearth and a convection flue are sequentially arranged in the boiler body from bottom to top, the grate is mounted in the hearth, the coal bucket is mounted on the lower portion of the boiler body, the water-cooled wall is mounted on the inner wall of the hearth, the upper boiler barrel is mounted at the upper end of the boiler body, the upper end of the vertical flue is communicated with an outlet of the convection flue, the steam superheater is mounted in the front of the convection flue, and the cast-iron economizer is mounted at the tail of the convection flue. The reciprocating grate boiler is used for supplying superheated steam for a steam turbine of the medium-high voltage power station.
Description
Technical field
The present invention relates to a kind of middle and high piezoelectricity station and use boiler, be specifically related to a kind of middle and high piezoelectricity station and use reciprocating-grate boiler.
Background technology
At present, Combustion technology of circulating fluidized is meant inferior fuel is used for power generating stage that the preliminary treatment power consumption that this technological shortcoming is a fuel is higher, operation power consumption height.Simultaneously; Because the distinctive combustion system of fluid bed; Make that its dust in flue gas concentration is big, particle diameter is little, have only cloth bag dust catcher and electrostatic precipitator could effectively isolate dust in flue gas, improved the initial cost and the operating cost of flue gas purifying equipment to satisfy environmental requirement; The flyash that fluidized bed combustion produces is difficult to utilize, and has caused secondary pollution.
Summary of the invention
Existing fluid unit preliminary treatment power consumption is high in order to solve, operation power consumption is high in the present invention; The dust concentration that burning back produces is big, particle diameter is little, the initial cost and the high problem of operating cost of contaminated environment, flue gas purifying equipment, and then proposes a kind of middle and high piezoelectricity station and use reciprocating-grate boiler.
The present invention addresses the above problem the technical scheme of taking to be: the present invention includes body of heater, also comprise coal bunker, fire grate, water-cooling wall, upper drum, steam superheater, vertical flue and cast iron gilled tube economizer, be provided with burner hearth, convection pass in the said body of heater from the bottom to top successively; Said burner hearth, convection pass are communicated with from the bottom to top successively, and said fire grate is installed in the burner hearth, and said coal bunker is installed in the bottom of body of heater; And coal bunker is communicated with burner hearth; The fuel that gets into burner hearth through coal bunker can drop on the fire grate, and said water-cooling wall is installed on the inwall of burner hearth, and said upper drum is installed in the upper end of body of heater; And upper drum is communicated with water-cooling wall; The upper end of said vertical flue is communicated with the outlet of convection pass, and said steam superheater is installed in the front portion of convection pass, and said cast iron gilled tube economizer is installed in the convection pass afterbody.
The invention has the beneficial effects as follows: the present invention is simple in structure, easy to operate, the thermal efficiency is high, be convenient to safeguard, operating cost is low, environmental pollution is little; The slag that produces after the present invention is burnt can be used as brickmaking and building material; Realize the comprehensive utilization of fuel, improved the single deficiency of burning means simultaneously; Cost of the present invention is merely 1/3rd of equal capacity fluid unit cost, and heating surface of the present invention adopts single drum π type arrangement form, has increased heating surface area.
Description of drawings
Fig. 1 is an overall structure sketch map of the present invention.
The specific embodiment
The specific embodiment one: combine Fig. 1 that this embodiment is described, the said a kind of middle and high piezoelectricity of this embodiment station comprises body of heater 1 with reciprocating-grate boiler, and it also comprises coal bunker 2, fire grate 3, water-cooling wall 4, upper drum 5, steam superheater 6, vertical flue 8 and cast iron gilled tube economizer 9; Be provided with burner hearth 1-1, convection pass 1-2 in the said body of heater 1 from the bottom to top successively; Said burner hearth 1-1, convection pass 1-2 are communicated with from the bottom to top successively, and said fire grate 3 is installed in the burner hearth 1-1, and said coal bunker 2 is installed in the bottom of body of heater 1; And coal bunker 2 is communicated with burner hearth 1-1; The fuel that gets into burner hearth 1-1 through coal bunker 2 can drop on the fire grate 3, and said water-cooling wall 4 is installed on the inwall of burner hearth 1-1, and said upper drum 5 is installed in the upper end of body of heater 1; And upper drum 5 is communicated with water-cooling wall 4; The upper end of said vertical flue 8 is communicated with the outlet of convection pass 1-2, and said steam superheater 6 is installed in the front portion of convection pass 1-2, and said cast iron gilled tube economizer 9 is installed in convection pass 1-2 afterbody.Medium cast iron economizer 9 of the present invention can further reduce exhaust gas temperature, and heat absorption working medium is heating system recirculated water in the cast iron gilled tube economizer 9.
Two types of bituminous coal of fire grate 3 using combustible low-calorific-values and brown coal among the present invention, operational efficiency of the present invention is 85%, and recirculating fluidized bed efficient is 88%, accounts for 4-5% but self consume energy, and both actual efficiencies maintain an equal level by contrast.Difference investment of equipment of the present invention=1: 3; Boiler room construction investment=1: 2; Systematic running cost usefulness (power consumption)=1: 3; Dust treatment investment of equipment and operating cost=1: 3; The flyash integrated treatment: the lime-ash of reciprocal grate is of many uses, and no matter all supply falls short of demand in large, medium and small city, and do not stack naturally and pollute.The powder ash particle diameter of recirculating fluidized bed is tiny, can not deposit naturally.Small and medium-sized cities having do not have the cement plant, and powder ash that can't be digestive circulating fluid bed makes recirculating fluidized bed to survive.
The specific embodiment two: combine Fig. 1 that this embodiment is described, be provided with steel tube economizer 7 in the vertical flue 8 of the said a kind of middle and high piezoelectricity of this embodiment station with reciprocating-grate boiler, several steel tube economizers 7 from top to bottom are provided with.Each steel tube economizer 7 in this embodiment absorbs the heat of low-temperature flue gas, reduces exhaust gas temperature, reduces flue gas loss, fuel saving.
Operation principle
Combustion process of the present invention is: fuel is fallen on the fire grate 3 from the coal bunker 2 of body of heater 1 bottom; Reciprocating motion through fire grate 3 is brought fuel in the burner hearth 1-1 into; The air of in hot environment, sending into for 3 times with fire grate mixes accomplishes preheating of fuel successively, and volatile matter is separated out coke burning and after-flame, in this course; Fire grate 3 has been strengthened fuel and Air mixing, and good burning condition and after-flame advantage is provided.
Diabatic process is: the high-temperature flue gas that fuel combustion produces gets in the burner hearth 1-1; Through the heat transferred water-cooling wall 4 of radiation heat transfer with flue gas; In burner hearth 1-1 outlet smokestack got into convection pass 1-2, the mode through heat convection folded into heat transferred steam superheater 6 in the vertical flue 8 then; In vertical flue 8, washing away steel tube economizer 7 backs from top to bottom and discharging, in vertical flue 8 from top to bottom wash away the effect of settling that steel tube economizer 7 has improved dust.
The boiler internal procedure is: the water inlet of boiler forced flow heat exchange in steel tube economizer 7 earlier; Get into upper drum 5 after fully absorbing the heat in the flue gas; Water dispensing apparatus through upper drum 5 gets into down-comer; Distribute to the next part case of each closed circuit then, water-cooling wall 4 adopts membrane wall structure, and it is long-pending to have improved radiation heating-surface; Strengthened the sealing of burner hearth; Water absorbs the water separator of the hyperthermia radiation thermosetting steam water interface entering upper drum 5 of burner hearth 1-1 in the water-cooling wall 4, and saturated vapor is derived entering steam superheater 6 by total gas outlet valve behind the even spiracular plate of air space, and the heat in the saturated vapor absorption flue gas in the steam superheater 6 forms the superheated steam steam supply turbine use of high temperature, high pressure.
Claims (2)
1. reciprocating-grate boiler is used at a middle and high piezoelectricity station; It comprises body of heater (1); It is characterized in that: said a kind of middle and high piezoelectricity station also comprises coal bunker (2), fire grate (3), water-cooling wall (4), upper drum (5), steam superheater (6), vertical flue (8) and cast iron gilled tube economizer (9) with reciprocating-grate boiler, is provided with burner hearth (1-1), convection pass (1-2) in the said body of heater (1) from the bottom to top successively, and said burner hearth (1-1), convection pass (1-2) are communicated with from the bottom to top successively; Said fire grate (3) is installed in the burner hearth (1-1); Said coal bunker (2) is installed in the bottom of body of heater (1), and coal bunker (2) is communicated with burner hearth (1-1), and the fuel that gets into burner hearth (1-1) through coal bunker (2) can drop on the fire grate (3); Said water-cooling wall (4) is installed on the inwall of burner hearth (1-1); Said upper drum (5) is installed in the upper end of body of heater (1), and upper drum (5) is communicated with water-cooling wall (4), and the upper end of said vertical flue (8) is communicated with the outlet of convection pass (1-2); Said steam superheater (6) is installed in the front portion of convection pass (1-2), and said cast iron gilled tube economizer (9) is installed in convection pass (1-2) afterbody.
2. use reciprocating-grate boiler according to the said a kind of middle and high piezoelectricity of claim 1 station, it is characterized in that: be provided with several steel tube economizers (7) in the said vertical flue (8), several steel tube economizers (7) from top to bottom are provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102839370A CN102506405A (en) | 2011-09-22 | 2011-09-22 | Reciprocating grate boiler for medium-high voltage power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102839370A CN102506405A (en) | 2011-09-22 | 2011-09-22 | Reciprocating grate boiler for medium-high voltage power station |
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| Publication Number | Publication Date |
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| CN102506405A true CN102506405A (en) | 2012-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011102839370A Pending CN102506405A (en) | 2011-09-22 | 2011-09-22 | Reciprocating grate boiler for medium-high voltage power station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112856366A (en) * | 2021-01-11 | 2021-05-28 | 北京德普新源生态技术有限公司 | Biomass direct-combustion water-cooling vibrating grate steam boiler |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1514170A (en) * | 2003-08-07 | 2004-07-21 | 尤潘垦 | Layered comustion type coal converting to gas industrial boiler |
| CN101135454A (en) * | 2007-09-30 | 2008-03-05 | 哈尔滨工业大学 | Dangerous waste incineration device |
| CN201448817U (en) * | 2009-04-09 | 2010-05-05 | 安徽金鼎锅炉股份有限公司 | Waste heat steam boiler for reciprocating grate residue incineration |
-
2011
- 2011-09-22 CN CN2011102839370A patent/CN102506405A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1514170A (en) * | 2003-08-07 | 2004-07-21 | 尤潘垦 | Layered comustion type coal converting to gas industrial boiler |
| CN101135454A (en) * | 2007-09-30 | 2008-03-05 | 哈尔滨工业大学 | Dangerous waste incineration device |
| CN201448817U (en) * | 2009-04-09 | 2010-05-05 | 安徽金鼎锅炉股份有限公司 | Waste heat steam boiler for reciprocating grate residue incineration |
Non-Patent Citations (1)
| Title |
|---|
| 孙大玺等: "垃圾焚烧炉技术探讨-加拿大某垃圾焚烧炉项目简介", 《科技信息》, no. 35, 31 December 2009 (2009-12-31), pages 1188 - 1111 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112856366A (en) * | 2021-01-11 | 2021-05-28 | 北京德普新源生态技术有限公司 | Biomass direct-combustion water-cooling vibrating grate steam boiler |
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Application publication date: 20120620 |