CN1536269A - Refuse incineration method for mixing and incinerating refuse by using coal-fired circulating fluidized bed boiler and its equipment - Google Patents
Refuse incineration method for mixing and incinerating refuse by using coal-fired circulating fluidized bed boiler and its equipment Download PDFInfo
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- CN1536269A CN1536269A CNA031121306A CN03112130A CN1536269A CN 1536269 A CN1536269 A CN 1536269A CN A031121306 A CNA031121306 A CN A031121306A CN 03112130 A CN03112130 A CN 03112130A CN 1536269 A CN1536269 A CN 1536269A
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Abstract
The present invention relates to a method for incinerating refuse by using coal burning circulating fluidized bed boiler to make mixed incineration of refuse. Said method includes the following steps: pulverizing combustible refuse, mixing it with coal powder or coal slurry or other combustible paste-like material, adding water and stirring them to obtain the paste-like material whose water content is 30-40%, utilizing plunger pump to convey the paste-like material into the coal-burning circulating fluidized bed boiler and feeding it into the boiler cavity from its top portion to make high-temp. combustion, and its boiler cavity temp. is 850-1100 deg.C.
Description
Technical field
The present invention relates to the incinerating method of rubbish, described rubbish comprises various lives, industrial the like waste and various crop stalk.
Background technology
Incinerator is various informative, but temperature low (being lower than 800 ℃) in the ubiquity stove, and easily produce strong toxic pollutant such as dioxin and enter atmosphere with flue gas and form secondary pollution, and problem such as dust recycling difficulty is big, and equipment is perishable.Measure according to science, when stove internal combustion temperature is lower than 800 ℃, very easily produce dioxin, when ignition temperature is higher than 800 ℃, almost do not detect dioxin in the flue gas, thus 800 ℃ be critical-temperature, but at present the temperature in the incinerator is difficult to make it surpass 800 ℃ with the method for economy.
Coal-fired and coal-fired mud CFBB has been generally acknowledged it is a kind ofly can remove 90%SO
2With low NO
xIgnition temperature in the efficient and environment-friendly type boiler of discharge capacity, its burner hearth is 850～1100 ℃, and the coal wide accommodation is widelyd popularize and popularized in China.Coal slime is as the byproduct of coal preparation plant, and its moisture height, viscosity is big, calorific value is low, difficult treatment, and environmental pollution is serious.Coal slime is burnt directly into stove, and belt conveyer and drag conveyor and extruser are still used in its conveying, and the investment of these methods is big, poor reliability, and environmental pollution is still relatively more serious.
Summary of the invention
Technical problem to be solved by this invention provides the garbage incineration method and the device of the fire coal circulating fluid bed boiler multifuel combustion of a kind of usefulness rubbish, and method, device are simply, and be reliable, and the high-temp combustion of rubbish decomposes the generation that can prevent dioxin.
The garbage incineration method of the fire coal circulating fluid bed boiler multifuel combustion of usefulness of the present invention rubbish, it is characterized in that combustible garbage pulverizing and coal dust or coal slime or other flammable paste mixing and water adding stirred and make moisture 30～40% paste, the top that is transported to fire coal circulating fluid bed boiler enters the burner hearth high-temp combustion, and temperature is 850～1100 ℃ in the burner hearth.
Major technique characteristics of the present invention are to have utilized known fire coal circulating fluid bed boiler to be used for the processing of rubbish, rubbish is transported to CFBB with the paste that mixes of similar combustibles such as coal dust or coal slime, finish the burning disposal of rubbish, equipment investment is simple, and is reliable.Paste enters burner hearth from the top squeeze of boiler, after the paste contained humidity is running into high temperature in the process that falls immediately vaporized expanding paste is exploded into fragment and takes fire, after falling into the concentrated phase area of burner hearth bottom, the high hotbed material that is the fluidisation attitude rubs littler fragment to produce more acutely decomposition combustion completely, thereby can not produce one of synthesis material of dioxin---aromatic ring type organic matter, and only produce CO
2And H
2O and other oxides.Simultaneously, mix CaCO in the bed material coal for desulfurization
3The CaO that decomposes the back generation removes and SO
2React and generate CaSO
4Also very easily generate CaCl outward, with another synthesis material of dioxin-HCI reaction
2, this has more reduced the possibility of generation dioxin, and has prevented the corrosion of HCI to equipment effectively.
The paste that the combustible of rubbish and coal dust, coal slime or similar coal slime forms is transported to CFBB by the coal slime plunger displacement pump, makes the equipment of whole technology simpler, invest low, the operational reliability height.
Described combustible garbage preferably is crushed to below the 50mm; The granularity of coal dust is preferably in below the 5mm.
The mixed proportion of described rubbish and coal dust or coal slime is dried rubbish: dry coal powder (in the dry coal powder)=1～2: 1 (weight ratio).
The flammable paste of similar coal slime of the present invention can substitute coal dust, coal slime, it can be organic sludge, mud as Sewage Plant, paper mill discharge, it also can be organic chemical industry's waste residue, mainly be to utilize the combustibility of these discarded objects to accomplish twice laid, the heat of burning is provided simultaneously, requires its calorific value should be not less than 6MJ/kg.The mixed proportion of they and rubbish is fallen to be advisable with incineration firing with itself and the common burning of rubbish fully.
Rubbish of the present invention comprises various lives, industrial the like waste and various crop stalk.
The package unit of realizing said method is: comprise agitator, plunger displacement pump, fire coal circulating fluid bed boiler, the drain hole of agitator is connected with plunger displacement pump by pipeline, and plunger displacement pump connects the top of fire coal circulating fluid bed boiler by pipeline.The outlet of fire coal circulating fluid bed boiler can continue to connect deduster, and the gas vent of deduster connects air-introduced machine, and air-introduced machine enters chimney with flue gas.The effect of agitator is the paste that flammable paste such as the rubbish after pulverizing and coal slime, coal dust and water is mixed the certain water content of formation.Paste is transported to the top of fire coal circulating fluid bed boiler by pipeline through plunger displacement pump pressurization back, after paste high-temp combustion in burner hearth decomposes, the slag of larger particles is discharged from the bottom of fire coal circulating fluid bed boiler, thinner ash and flue gas enter into deduster, thinner ash is discharged by the ash hole of deduster, and flue gas is sent into the smoke stack emission atmosphere by air-introduced machine.
Advantage of the present invention:
Utilize the coal slime plunger displacement pump conveying technology and the CFBB coal combustion technology of mature and reliable, mix equably after flammable organic waste pulverized in the combustible of coal dust, coal slime or similar coal slime and form paste, realize the pyrolytic burning of rubbish, prevent the generation of dioxin, and can realize the comprehensive utilization (lime-ash can be used as first-class building materials raw material) of refuse.Whole technology, equipment dispose simple, small investment, and it is easy, reliable to implement.
Description of drawings
Fig. 1 is technological process of the present invention and device schematic diagram;
Among the figure: 1-garbage pulverator 2-coal pulverizer 3-agitator 4-plunger displacement pump 5-CFBB 6-electrostatic precipitator 7-air-introduced machine 8-chimney 9-coal bunker 10-feeder 11-pressure fan 12-chute 13-batcher 14-pipeline
The specific embodiment
The present invention is described in detail below in conjunction with Fig. 1:
The main fuel of CFBB is a coal, and granularity is≤10mm to mix the CaCo less than 0.5mm
3After deposit in the coal bunker 9, send into the bottom of burner hearth by feeder 10, be the burning of fluidisation attitude, temperature is 850～900 ℃ because the combustion-supporting effect of secondary wind, unburned CO, CH
4And H
2Heat is emitted in the further burning in middle part and top at burner hearth, and temperature herein will be above 850 ℃.Sorted combustible garbage is crushed to the material with coal slime or similar coal slime below the 50mm through pulverizer and sends into agitator 3 with the coal dust less than 5mm that comes through coal pulverizer, add the paste that stirs into water content 30～40% behind the water, send into heavy caliber hydraulic planger pump 4 at a slow speed by batcher 13, the pressurization back is the cylindric burner hearth that falls into along the top that pipeline 14 is clamp-oned CFBB (CFB) 5 by deadweight.Paste enters the high temperature that burner hearth just runs into 850～1100 ℃, after the moisture content rapid evaporation on surface, inflammable substance takes fire, inner contained moisture content is subjected to high temperature action vaporization generation pressure that cylindrical paste is exploded into fragment, in dropping process, blast is linksystem, burning is also more and more fierce simultaneously, when falling into burner hearth bottom, become fritter shape comburant, the souring that these fritters are subjected to fluidisation shape bed material again becomes tiny particle rapidly, enters the fluidisation attitude of seething up and down, and combustion decomposition is more violent, the fragment of rubbish is subjected to having the low-temperature space that can not enter the rear portion flue after the adhesion of coal slime cream-like of certain viscosity with flue gas fast, organic combustible in rubbish and the coal obtains decomposing comparatively completely like this, no longer produces the aromatic ring type organic, the HCI that emits simultaneously also with CaO, MgO, AL
2O
3, FeO, K
2O, Na
2Alkaline matters such as O produce neutralization reaction and generate stable hydrochloric acid salt, have prevented the generation of dioxin and to the corrosion of equipment.The slag of larger particles is discharged from the bottom (A mouth) of fluidized-bed combustion boiler, and thinner ash is discharged by the ash hole (B mouth) of deduster 6, and these two kinds of materials all are first-class raw materials of building materials such as making cement.The flue gas that does not contain dioxin after being cleaned is sent into chimney 8 by air-introduced machine 7 and is entered atmosphere.Pressure fan 11 provides the air of fluidisation and burning to CFBB 5.
Claims (9)
1, the garbage incineration method of the fire coal circulating fluid bed boiler multifuel combustion of a kind of usefulness rubbish, it is characterized in that combustible garbage pulverizing and coal dust or coal slime or other flammable paste mixing and water adding stirred and make moisture 30～40% paste, the top that is transported to fire coal circulating fluid bed boiler enters the burner hearth high-temp combustion, and temperature is 850～1100 ℃ in the burner hearth.
2, incinerating method according to claim 1 is characterized in that described paste is transported to the top of fire coal circulating fluid bed boiler by plunger displacement pump.
3, incinerating method according to claim 1 is characterized in that described combustible garbage is crushed to below the 50mm.
4, incinerating method according to claim 1 is characterized in that the mixed proportion of described rubbish and coal dust or coal slime is, dried rubbish: dry coal powder=1～2: 1.
5, according to claim 1 or 3 described incinerating methods, the granularity that it is characterized in that described coal dust is below 5mm.
6, incinerating method according to claim 1 is characterized in that described flammable paste comprises organic sludge, organic chemical industry's waste residue.
7, according to claim 1 or 6 described incinerating methods, the calorific value that it is characterized in that described flammable paste is more than 6MJ/kg.
8, the garbage combustion device of the fire coal circulating fluid bed boiler multifuel combustion of a kind of usefulness rubbish, it is characterized in that comprising agitator, plunger displacement pump, fire coal circulating fluid bed boiler, the drain hole of agitator is connected with plunger displacement pump by batcher, and plunger displacement pump connects the top of fire coal circulating fluid bed boiler by pipeline.
9, device according to claim 8 is characterized in that the outlet of fire coal circulating fluid bed boiler connects deduster, and the gas vent of deduster connects air-introduced machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03112130 CN1273766C (en) | 2003-04-07 | 2003-04-07 | Refuse incineration method for mixing and incinerating refuse by using coal-fired circulating fluidized bed boiler and its equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03112130 CN1273766C (en) | 2003-04-07 | 2003-04-07 | Refuse incineration method for mixing and incinerating refuse by using coal-fired circulating fluidized bed boiler and its equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1536269A true CN1536269A (en) | 2004-10-13 |
| CN1273766C CN1273766C (en) | 2006-09-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03112130 Expired - Fee Related CN1273766C (en) | 2003-04-07 | 2003-04-07 | Refuse incineration method for mixing and incinerating refuse by using coal-fired circulating fluidized bed boiler and its equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101822953A (en) * | 2009-03-03 | 2010-09-08 | 哈尔滨瑞格能源环境技术发展有限责任公司 | Method for mixing two or more high-temperature solid materials |
| CN103471107A (en) * | 2013-09-27 | 2013-12-25 | 苏州展阳新能源科技有限公司 | Process and equipment thereof for incinerating salt-containing sludge by adopting fluidized bed suspension pot |
| CN103528052A (en) * | 2013-10-14 | 2014-01-22 | 上海交通大学 | Municipal sludge-coal washing sludge co-fired organic working medium boiler |
| CN104501182A (en) * | 2014-12-04 | 2015-04-08 | 中国电建集团贵阳勘测设计研究院有限公司 | Method and device for treating organic solid waste garbage and sludge in hospital |
| CN104776425A (en) * | 2015-04-17 | 2015-07-15 | 贵州电力试验研究院 | Over-temperature prevention device for CFB (circulating fluid bed) boiler after addition and burning of peat and control method of over-temperature prevention device |
| CN109945173A (en) * | 2018-12-31 | 2019-06-28 | 中国能源建设集团华东电力试验研究院有限公司 | High proportion burning mixed mud circulating fluidized bed boiler optimization system and control method |
-
2003
- 2003-04-07 CN CN 03112130 patent/CN1273766C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101822953A (en) * | 2009-03-03 | 2010-09-08 | 哈尔滨瑞格能源环境技术发展有限责任公司 | Method for mixing two or more high-temperature solid materials |
| CN101822953B (en) * | 2009-03-03 | 2014-04-02 | 哈尔滨瑞格能源环境技术发展有限责任公司 | Method for mixing two or more high-temperature solid materials |
| CN103471107A (en) * | 2013-09-27 | 2013-12-25 | 苏州展阳新能源科技有限公司 | Process and equipment thereof for incinerating salt-containing sludge by adopting fluidized bed suspension pot |
| CN103528052A (en) * | 2013-10-14 | 2014-01-22 | 上海交通大学 | Municipal sludge-coal washing sludge co-fired organic working medium boiler |
| CN103528052B (en) * | 2013-10-14 | 2016-06-08 | 上海交通大学 | Municipal sludge-coal washing mud mixes the organic working medium boiler of burning |
| CN104501182A (en) * | 2014-12-04 | 2015-04-08 | 中国电建集团贵阳勘测设计研究院有限公司 | Method and device for treating organic solid waste garbage and sludge in hospital |
| CN104501182B (en) * | 2014-12-04 | 2017-05-17 | 中国电建集团贵阳勘测设计研究院有限公司 | Method and device for treating organic solid waste garbage and sludge in hospital |
| CN104776425A (en) * | 2015-04-17 | 2015-07-15 | 贵州电力试验研究院 | Over-temperature prevention device for CFB (circulating fluid bed) boiler after addition and burning of peat and control method of over-temperature prevention device |
| CN109945173A (en) * | 2018-12-31 | 2019-06-28 | 中国能源建设集团华东电力试验研究院有限公司 | High proportion burning mixed mud circulating fluidized bed boiler optimization system and control method |
| CN109945173B (en) * | 2018-12-31 | 2024-03-19 | 中国能源建设集团华东电力试验研究院有限公司 | High-proportion mixed-combustion sludge circulating fluidized bed boiler optimization system and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1273766C (en) | 2006-09-06 |
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