CN1032583A - Boiler slag second-time burning power-economizing method and device - Google Patents
Boiler slag second-time burning power-economizing method and device Download PDFInfo
- Publication number
- CN1032583A CN1032583A CN 87107041 CN87107041A CN1032583A CN 1032583 A CN1032583 A CN 1032583A CN 87107041 CN87107041 CN 87107041 CN 87107041 A CN87107041 A CN 87107041A CN 1032583 A CN1032583 A CN 1032583A
- Authority
- CN
- China
- Prior art keywords
- slag
- boiler
- burning
- air
- combustion chamber
- 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.)
- Withdrawn
Links
Landscapes
- Air Supply (AREA)
- Gasification And Melting Of Waste (AREA)
Abstract
The invention discloses a kind of a kind of power-economizing method and device that is used for reclaiming and utilizing boiler slag combustible heat.This method and apparatus is to utilize the Boiling Combustion technology that slag is carried out second-time burning, and the high-temperature flue gas after the burning is used for adding hot water or steam and improves boiler inlet temperature.This device also comprises slag crusher, feed appliance, Boiling Combustion chamber, air blast, heating surface and control system etc.The content that use of the present invention makes combustible in the slag from 15% drop to below 3% and can improve the EAT of boiler and prevent preheater because of dewfall causes stifled ash.Good energy-conserving effect of the present invention, installation cost are low, and full payment can be regained in 1 year.
Description
The present invention relates to a kind of device that improves the method for the grate firing boiler thermal efficiency and realize this method, it belongs to a kind of power-economizing method and the device that reclaims and utilize combustible heat in the grate firing boiler lime-ash, be specially adapted to the double-deck chain furnace of arranging of capacity more than 6 tons/hour, also can be used for other fire grate, as reciprocal grate etc.
Industrial boilers in China is widely used in each department of national economy at present, has a large capacity and a wide range, and energy-output ratio is very big.The overwhelming majority is the grate firing type boiler in the Industrial Boiler.Chain furnace accounts for 2/3rds of grate furnace again, and with regard to its absolute magnitude, the Industrial Boiler more than 6 tons/hour that China has installed and used has 30,000, and annual also with about 2,000 speed production.Though this class boiler have use reliable, advantages such as combustion process coal mucking machineization, it to ature of coal change bad adaptability, air distribution is difficult for evenly, boiler thermal output is not high.The SHL series chain bar ovens maximum with present production are example, and design efficiency is generally 75-78% with evaluation efficient.In fact because the problem of aspects such as the size of the granularity of ature of coal, coal and operation, actual efficiency is several far below this.According to statistics, its evenly heat efficient of 20,000 Industrial Boilers more than 6 tons/hour of China has only 65%.The main cause that the thermal efficiency is on the low side is owing to unburned carbon loss and heat loss due to exhaust gas is excessive causes, and these two heat loss account for the 80-90% of the total heat loss of boiler.The industrial boilers in China burning coal is generally relatively poor, the cinder content height.Combustible content is everlasting more than 15% in the boiler slag, and combustible content is everlasting more than 40% in the flying dust.The boiler that also has in addition is in operation excess air coefficient up to more than 3, often causes air preheater seriously to stop up, and has limited and has exerted oneself, and exhaust gas temperature is raise, even opens the operation of bypass flue.These factors all seriously affect the raising of boiler thermal output.
The object of the present invention is to provide a kind of effective method and device, big with combustible content height in the ubiquitous lime-ash of Industrial Boiler that solves 6 tons/hour and above specification, unburned carbon loss, and air preheater blocks up problems such as ash, and combustible content is reduced to below 3% from 15%, to improve the purpose of boiler thermal output.
The present invention utilizes the Boiling Combustion technology, and by slag crusher, the high temperature furnace slag after the boiler combustion is broken and import the Boiling Combustion chamber and carry out secondary and burn, and making wherein, combustible further is converted into heat energy; Simultaneously this heat energy is mainly used in the raising boiler inlet temperature, adds hot water or steam etc., improve boiler thermal output, thereby realize above-mentioned purpose with this.
Realization of the present invention is the high temperature furnace slag of will discharge from boiler, through crusher in crushing to≤10mm granularity, through feed appliance II input Boiling Combustion chamber III, be higher than burning-point then owing to enter the disintegrating slag temperature of bed, thus slag in the combustion chamber, do not need external heat source can fire burns.Through the slag after the Boiling Combustion wherein combustible content can drop to below 3%.Under nominal situation, the temperature of boiling bed is to regulate with the method for regulating excess air, and bed temperature generally is controlled at 800～1000 ℃.Load can change in the actual motion, ature of coal also can change, and the combustion process instability that may occur, thereby make the quantity of slag that enters the combustion chamber and wherein combustible content bigger variation occur, this variation will cause that combustion chamber temperature changes.At this moment, the control system VI will be according to the adjustment intake of boiling bed, with the temperature that keeps bed within the required range, if the carbon amount is too much in the charging, exceed its adjustable range, promptly air door regulating system 11, air door be opened to greatest extent, and bed temperature is also when continuing to raise, then open overflow valve 8, discharge unnecessary slag, to keep normal bed temperature.
The Btu utilization of the high-temperature flue gas that the combustion chamber produced can have various ways, as: can be earlier through a heating surface, heated feed water or steam, waste heat are used to add hot-air to improve burning condition and to prevent that air from giving the tube wall dewfall of hot device.Heating surface can adopt heat transfer component or elements such as various economizers, superheater, tube bank.Flying dust in the flue gas is filtered by the burning zone on the fire grate time, and sinters piece in combustion process.Also flue gas directly can be sent into burner hearth and mix, in boiler body, utilize heat with the simplification system with boiler smoke.
Accompanying drawing three is process charts of the present invention,
The device of realizing this method partly is made of slag crusher I, feed appliance II, combustion chamber III, air blast IV, heating surface V, control system VI etc., and wherein heating surface also can omit.Original boiler body is constant, and air blast and control system adopt standard device.
Embodiment:
The SHL10-13 type boiler of producing with Taiyuan, Boiler Factory is an example, boiler load 5-10 ton/hour, use II bituminous coal, the grey quantity of slag 270～550,000 Grams Per Hours, unburned combustible in slag about 15%, 11000 tons of year coal consumptions.
Boiler and subsidiary engine are not all changed during installation, only remove mucking machine, with slag crusher I among the present invention advance charging aperture directly dress annotate the perch heating surface V of remonstrating with and use superheater, be loaded on the top of Boiling Combustion chamber, gas fume after burning through superheater, flue door 13, be connected to boiler hot-flow flue 12, with enter fire grate 1 after the hot blast of air preheater mixes; Another smoke pipe communicates (not expressing among the figure) with the blast pipe of boiler fan, to improve the EAT of preheater.
Slag crusher is made of coarse crushing roller 1, roller in small, broken bits 4, disintegrating slag plate 3, motor 5 etc.The feed appliance II also can adopt feeder by flapper 6(), delivery nozzle 7, overflow valve 8 form; The bottom of Boiling Combustion chamber III is a pair of lamina air distribution plate 10, and the characteristics of this structure are that the air quantity adjustable range is big, and bellows are double-decker, and lower floor's air feed cap air-supply, upper strata are for the air distribution plate air-supply, and the air quantity ratio can reach 2.5; The intake of combustion chamber 9 is regulated by air door regulating system 11, and present embodiment adopts DDZ-III single pulse regulating system; The right 180 degree blower fans of the 5-29-11 № 5D that air blast adopts Dandong industrial fan factory to produce, 5.5 thousand watts of power, 2890 rev/mins of rotating speeds.
The working procedure of this device: from the high temperature furnace slag of traveling-grate stoker discharge, enter the slag crusher I from the boiler slag notch, through thick, in small, broken bits to≤10mm granularity, send into Boiling Combustion chamber III through the feed appliance II again, the temperature of slag is more than burning-point at this moment, enough oxygen and space are arranged in the Boiling Combustion chamber 9., and slag is burnt fully.The aperture that bed temperature comes damper by control system VI, air door regulating system 11 is regulated with the size that changes excess air.Air quantity can be from 800 meters in the present embodiment
3/ hour to 2000 meters
3Regulate in/hour the scope.
The breaking capacity of slag crusher is: 1 ton/hour, and coarse crushing roller rotating speed: 5 rev/mins, 10 rev/mins on roller in small, broken bits, motor power (output): 2.2 thousand watts; The air distribution plate of Boiling Combustion chamber is of a size of 400 * 1000mm, intake 800～2000 mark rice
3/ hour, static bed depth 400mm; The heating surface area of superheater is 34 meters
2, 230 ℃ of the superheat steam temperatures of operating pressure 13 crust, generation.Flue gas by superheater after temperature be cooled to 400 ℃ by 900 ℃, at this moment, wherein part of smoke is used to improve the EAT to 60 ℃ of preheater, prevents the tube wall dewfall and causes the stifled ash of preheater; All the other flue gases mix with hot blast behind the preheater, make hot blast temperature bring up to 200 ℃ by 140 ℃ after the former boiler grate of input, to improve burning condition.The flying dust that produces during Boiling Combustion is filtered by the fuel bed on the fire grate time, and sinters piece in the combustion process afterwards.
Use of the present invention can make the content of Boiler Furnace combustibles in the slag drop to below 3% from 15%; Improve simultaneously the stifled ash that EAT has prevented that air preheater from causing owing to dewfall, from and reduced air-introduced machine burden, reduced power consumption, improved exerting oneself of boiler. Take present embodiment as example, employing of the present invention can make boiler thermal output improve 7%, annual 1300 tons in the raw coal (being equivalent to 785 tons of standard coals) of saving, and the investment of saving standard coal per ton is about 80 yuan. Therefore good energy-conserving effect of the present invention, installation cost low, owing to do not change boiler body, Gu practicality is also strong, full payment can be regained in 1 year.
Accompanying drawing:
Figure one, be scheme of installation of the present invention.Double dot dash line is former boiler part among the figure; Heavy line is a device schematic diagram of the present invention.
Figure two, for structural representation of the present invention.Double dot dash line is former boiler part among the figure.
Claims (8)
1, a kind of power-economizing method and device that utilizes the boiler slag second-time burning with the raising boiler thermal output, it comprises boiler body and subsidiary engine thereof etc., it is characterized in that:
A, described method are the high temperature furnace slags that boiler is discharged, after the slag crusher fragmentation, send into the ebullated bed second-time burning by feed appliance, the high-temperature flue gas of burning back gained adds hot water or steam by heating surface, flow through flue gas behind the heating surface, a part is given hot device air intake with air and is mixed, improve EAT, preventing the tube wall dewfall, all the other flue gases with give hot device after hot gas mix, improve the fire grate EAT, to improve the burning condition of boiler, flying dust in the flue gas is trapped through the burning zone on the fire grate time, and sinters piece on fire grate
B, described device also comprise the broken quarrel machine I that is used for the crash high temperature slag, disintegrating slag are imported feed appliance II, air blast IV, heating surface V and the control system VI of Boiling Combustion chamber III.
2, by claim 1, described power-economizing method, it is characterized in that so-called high temperature furnace slag is meant the slag of directly being got rid of by boiler without cooling, through be crushed to≤when the 10mm granularity is following, its temperature still more than burning-point, this slag input Boiling Combustion chamber do not need external heat source can fire burns.
3, by claim 1, described device, it is characterized in that so-called high temperature slag crusher, be meant the slag crusher of the thermal slag of temperature more than burning-point of can be broken discharging by boiler grate.
4, by claim 1, described device, it is characterized in that so-called feed appliance is meant the device of the slag after the fragmentation being sent into continuously the Boiling Combustion chamber, it comprises flapper (or feed appliance) 6, delivery nozzle 7, and overflow valve 8.
5, by claim 1, described device, it is characterized in that so-called heating surface is meant heat transfer component or elements such as various economizers, superheater, tube bank.
6, by claim 1, described method and apparatus, it is characterized in that so-called control system is meant the intake of controlling the layer cloth aerofoil according to fluidized layer temperature, to regulate bed temperature, make it under different load conditions, all can reach clean-burning control system.
7, by claim 1, described combustion chamber, it is characterized in that it is based on the Boiling Combustion technology, utilize the layer cloth aerofoil, to enlarge the air quantity adjustable range in the bottom, combustion chamber, the upper strata of bellows is for the air-supply of strip air distribution plate, lower floor's air feed cap air-supply, and its air quantity is regulated than arriving 2.5.
8,, it is characterized in that it is applicable to chain furnace or other boiler that the bilayer of 6 tons/hour and above capacity is arranged by claim 1, described power-economizing method and device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87107041 CN1032583A (en) | 1987-10-16 | 1987-10-16 | Boiler slag second-time burning power-economizing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87107041 CN1032583A (en) | 1987-10-16 | 1987-10-16 | Boiler slag second-time burning power-economizing method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1032583A true CN1032583A (en) | 1989-04-26 |
Family
ID=4815944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87107041 Withdrawn CN1032583A (en) | 1987-10-16 | 1987-10-16 | Boiler slag second-time burning power-economizing method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1032583A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042585A (en) * | 2011-01-25 | 2011-05-04 | 北京德普新源科技发展有限公司 | Reburning and discharging device of slag and soot of biomass direct-fired power generation boiler |
| CN101033851B (en) * | 2005-11-30 | 2012-04-25 | 通用电气公司 | System and method for decreasing a rate of slag formation at predetermined locations in a boiler system |
| CN102588950A (en) * | 2012-03-02 | 2012-07-18 | 浙江大学 | Novel high-efficiency vaporizing combustion compound furnace grate device with slag disintegrating function |
| CN102818254A (en) * | 2012-07-25 | 2012-12-12 | 北京国电富通科技发展有限责任公司 | Slag treatment system and method of biomass boiler |
| CN103712200A (en) * | 2013-12-30 | 2014-04-09 | 广西柳锅锅炉制造有限公司 | Spiral-flow membrane type wall structure package boiler burning biomass particles |
| CN112413891A (en) * | 2019-08-23 | 2021-02-26 | 克麦罗沃安全设备试验厂股份公司 | Modularized heat energy complex and method for heating mine air by using same |
-
1987
- 1987-10-16 CN CN 87107041 patent/CN1032583A/en not_active Withdrawn
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101033851B (en) * | 2005-11-30 | 2012-04-25 | 通用电气公司 | System and method for decreasing a rate of slag formation at predetermined locations in a boiler system |
| CN102042585A (en) * | 2011-01-25 | 2011-05-04 | 北京德普新源科技发展有限公司 | Reburning and discharging device of slag and soot of biomass direct-fired power generation boiler |
| CN102042585B (en) * | 2011-01-25 | 2011-12-07 | 北京德普新源科技发展有限公司 | Reburning and discharging device of slag and soot of biomass direct-fired power generation boiler |
| CN102588950A (en) * | 2012-03-02 | 2012-07-18 | 浙江大学 | Novel high-efficiency vaporizing combustion compound furnace grate device with slag disintegrating function |
| CN102588950B (en) * | 2012-03-02 | 2014-05-14 | 浙江大学 | Novel high-efficiency vaporizing combustion compound furnace grate device with slag disintegrating function |
| CN102818254A (en) * | 2012-07-25 | 2012-12-12 | 北京国电富通科技发展有限责任公司 | Slag treatment system and method of biomass boiler |
| CN102818254B (en) * | 2012-07-25 | 2015-04-01 | 北京国电富通科技发展有限责任公司 | Slag treatment system and method of biomass boiler |
| CN103712200A (en) * | 2013-12-30 | 2014-04-09 | 广西柳锅锅炉制造有限公司 | Spiral-flow membrane type wall structure package boiler burning biomass particles |
| CN103712200B (en) * | 2013-12-30 | 2016-08-17 | 广西柳锅锅炉制造有限公司 | A kind of membrane wall structure self-contained boiler of spiral-flow type burning biomass particle |
| CN112413891A (en) * | 2019-08-23 | 2021-02-26 | 克麦罗沃安全设备试验厂股份公司 | Modularized heat energy complex and method for heating mine air by using same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109140431B (en) | Ignition method of circulating fluidized bed boiler | |
| CN104990069A (en) | Combustion system improving safety and economical performance of opposite-firing boiler | |
| CN102818257A (en) | Heat accumulating type direct-fired boiler using biomass fuel | |
| CN1032583A (en) | Boiler slag second-time burning power-economizing method and device | |
| CN101639216A (en) | Stable combustion method of coal water slurry boiler and device thereof | |
| CN204786354U (en) | Combustion system of wall opposed firing boiler security and economic nature around improving | |
| CN103383143A (en) | Novel efficient air heater | |
| CN105112076B (en) | System and method for gas direct heating | |
| CN85100561A (en) | Water-coal-slurry and coal dust boiler with precombustion chamber for burning | |
| CN207963145U (en) | High-efficiency environment friendly tangerine stalk solid biomass gasification fired boiler | |
| CN208042119U (en) | Parallel-connection type coal-burning powder heat medium heater | |
| CN2733195Y (en) | Fire coal power plant boiler cold state pulverizing apparatus | |
| CN102705813B (en) | Boiler combustion method for biomass fuel and boiler for biomass fuel | |
| CN112032730A (en) | System and method for recycling high-water-content household garbage by using high-temperature flue gas | |
| CN204922956U (en) | Circulating fluidized bed boiler of burning offal | |
| CN113137608A (en) | Oil gas solid multi-fuel solid heat carrier furnace | |
| CN220771378U (en) | Multi-fuel direct-fired hot blast stove | |
| CN2793550Y (en) | Boiler with tailed gas of carbon black as fuel | |
| CN204254662U (en) | Take the boiler of air zoning | |
| CN219640293U (en) | W-shaped flame boiler capable of improving temperature of wind powder through high-temperature flue gas | |
| CN201925912U (en) | Suspension pulverized coal and CWS (coal water slurry) compound combustion device | |
| CN2372565Y (en) | Internal combustion life refuse incinerator | |
| CN218154311U (en) | Low-load stable combustion system of fluidized bed boiler | |
| CN218154187U (en) | SCR deNOx systems's gas temperature governing system | |
| CN214094448U (en) | High-temperature low-nitrogen environment-friendly type burn-out air system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |