CN102353044A - Gas combustion-supporting device of recirculating fluidized bed and combustion control device of recirculating fluidized bed - Google Patents

Gas combustion-supporting device of recirculating fluidized bed and combustion control device of recirculating fluidized bed Download PDF

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Publication number
CN102353044A
CN102353044A CN2011102682444A CN201110268244A CN102353044A CN 102353044 A CN102353044 A CN 102353044A CN 2011102682444 A CN2011102682444 A CN 2011102682444A CN 201110268244 A CN201110268244 A CN 201110268244A CN 102353044 A CN102353044 A CN 102353044A
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CN
China
Prior art keywords
fluidized bed
combustion
gas
combustion chamber
bed
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CN2011102682444A
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Chinese (zh)
Inventor
魏猛
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北京君达能源投资有限公司
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Priority to CN2011102682444A priority Critical patent/CN102353044A/en
Publication of CN102353044A publication Critical patent/CN102353044A/en

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/32Direct CO2 mitigation

Abstract

The invention relates to the technical field of fluidized bed combustion, and in particular relates to a gas combustion-supporting device of a recirculating fluidized bed and a combustion control device of the recirculating fluidized bed. The combustion-supporting device comprises a fluidized bed combustion chamber and a gas compression device; the gas compression device is communicated with the fluidized bed combustion chamber through a pipeline, and gas is introduced into the fluidized bed combustion chamber; and the top end of the pipeline is provided with a gas compression ejector. Through the gas combustion-supporting device of the recirculating fluidized bed provided by the invention, the problem of insufficient combustion brought by the calorific value, less than 2500kcal/kg, of the recirculating fluidized bed of fuel material (mud) can be solved effectively, thus the combustion is fuller, and the desulfurization and deslagging operations are easier, and clean combustion is realized; simultaneously the emission of carbon dioxide is reduced effectively, and the tail gas treating cost is lowered; and in addition, the sufficient combustion of fuel materials in the fluidized bed enables the fuel material waste residue to be decreased greatly, the problem of land occupation by landfill of waste residue is solved effectively, the comprehensive benefit is good, and the device and the system accord with the principles of reduction, harmlessness and resource utilization of mud treatment.

Description

Circulation fluidized-bed gas auxiliary combustion equipment and combustion control system of circulating fluidized bed
Technical field
The present invention relates to the fluidized bed combustion field, particularly a kind of combustion control system of circulating fluidized bed and circulation fluidized-bed gas auxiliary combustion equipment thereof.
Background technology
CFBB is a kind of solid combustion boiler that uses; Through constantly gathering, sedimentation of particle cluster, the physics development process that dispels, rise and reassociate; Make violent heat and mass exchange take place between gas and solids in the circulation fluidized bed, form circulation in the stove.Air-flow is very big to the effect of carrying secretly of solid particle simultaneously, makes a large amount of unburnt fuel particles (comprising the not sulphur-fixing agent particle of complete reaction of part) leave burner hearth with flue gas.
Taken out of most of material particles of burner hearth separates through cyclone separator by flue gas stream; Again in feeding back device is sent the bed of burner hearth bottom back to; To safeguard the constant continuous duty of bed material total amount in the stove; Strengthen the utilization rate of the incendivity thing burning degree of depth and solid vulcanizing agent, thereby form the outer material circulating system of stove.
Recirculating fluidized bed can be used for discarded object such as burning disposal such as rubbish, mud.During burning disposal, require discarded object low-burning value more than 2500kcal/kg, when being lower than this fuel value, because burning can not be continuous, need add fossil fuel, generally, it is combustion-supporting that employing adds coal-fired realization.Behind the adding fire coal, furnace charge (mud, discarded object) burns when flowing with coal-fired, and the gas that this fluid bed is discharged carries out the solid and gas separation through cyclone separator.Solid matter gets in the fluid bed through the return duct circulation.Through back and forth carrying out of said process, fully burning back formation carbonizing matter is separated.The gas of discharging is through pump-down process and UTILIZATION OF VESIDUAL HEAT IN recycling.
Yet; The fire coal that adds; Make emission amount of carbon dioxide promote significantly; Compare with large-scale critical supercritical unit; It spends electric cost height, and coal consumption is high, and should form caking easily by fire coal; Increase the Circulation fluidized-bed furnace wearing and tearing, increase desulphurization cost simultaneously, make the waste sludge discharge intractability strengthen.
Summary of the invention
(1) technical problem that will solve
The technical problem that the present invention will solve provides a kind of circulation fluidized-bed gas auxiliary combustion equipment and combustion control system of circulating fluidized bed; To overcome in the prior art through in the combustion chamber, inserting the CO2 emissions height that coal-fired combustion-supporting brings; Coal consumption is high; It is high to spend electric cost; The vent gas treatment cost is high; And cinder lumps easily, causes Circulation fluidized-bed furnace to wear and tear, and the waste sludge discharge amount is big thereby defective such as intractability increasing.
(2) technical scheme
In order to address the above problem; One aspect of the present invention provides a kind of circulation fluidized-bed gas auxiliary combustion equipment; Comprise fluidized bed combustion chamber and gas pressure compression apparatus, said gas pressure compression apparatus communicates with fluidized bed combustion chamber through pipeline, in fluidized bed combustion chamber, feeds combustion gas; Combustion gas compression injector is installed on the top of said pipeline.
Further, said combustion gas compression injector is made up of combustion gas block, nozzle, magnetic valve and control board of electromagnetic valve, and said combustion gas block is enclosed within on the said nozzle; Said magnetic valve is connected with the control board of electromagnetic valve circuit with nozzle respectively.
Further, said combustion gas block has endoporus, perforate on the sidewall of combustion gas block, and its perforate direction is inclined upwardly.
Further, said perforate direction be inclined upwardly 45 the degree.
Further, bed temperature sensor is installed in the bottom of said fluidized bed combustion chamber, and said bed temperature sensor is connected with control board of electromagnetic valve.
Further, dilute-phase zone smoke density sensor is installed on the top of said fluidized bed combustion chamber;
Emulsion zone smoke density sensor is installed in the bottom of said fluidized bed combustion chamber, and said dilute-phase zone smoke density sensor is connected with control board of electromagnetic valve respectively with emulsion zone smoke density sensor.
On the other hand; The present invention also provides a kind of combustion control system of circulating fluidized bed; It comprises above-mentioned circulation fluidized-bed gas auxiliary combustion equipment; Also comprise: the air-distribution device and the slag-drip opening that are positioned at the fluidized bed combustion chamber bottom; Said air-distribution device comprises air distribution plate and air compartment, and said pipeline passes air distribution plate and communicates with the fluidized bed combustion chamber interior; Said air compartment has the wind supply port one time.
Further, a plurality of blast caps that are used for to fluidized bed combustion chamber interior bubbling air of distribution on the said air distribution plate.
Further, said fluidized bed combustion chamber also has furnace charge charging aperture, lime stone charging aperture, secondary wind supply air inlet.
Further, the top of said fluidized bed combustion chamber and middle part are communicated with cyclone separator respectively, and the bottom of said fluidized bed combustion chamber is communicated with fluidized bed exchanger; The other end of said cyclone separator connects supplies with chamber, has air supply port, steam supply port and water supply port on the said supply chamber, and the bottom of said supply chamber connects thin grey outlet and deduster.
(3) beneficial effect
Circulation fluidized-bed gas auxiliary combustion equipment provided by the invention and combustion control system of circulating fluidized bed; The inadequate problem of bringing in the time of can effectively solving the fuel (mud, discarded object) that uses calorific value to be lower than 2500kcal/kg in the recirculating fluidized bed of burning; Under the situation of not adding fossil fuel; Feasible burning more fully fully; And desulfurization, to remove slag operation more easy, thereby realize clean burning; Simultaneously can effectively reduce emission of carbon-dioxide, reduce the vent gas treatment cost.In addition, the abundant burning of fuel in the fluid bed makes the fuel waste residue significantly reduce, and can effectively solve waste residue landfill land occupation problem, and comprehensive benefit is good, meets the principle of Treatment of Sludge minimizing, innoxious, the utilization of resourcesization.
Description of drawings
Fig. 1 is an embodiment of the invention circulation fluidized-bed gas auxiliary combustion equipment structural representation;
Fig. 2 is an embodiment of the invention circulation fluidized-bed gas auxiliary combustion equipment structure Apoplexy cap structural representation;
Fig. 3 is an embodiment of the invention combustion control system of circulating fluidized bed sketch map.
Wherein: 1, fluidized bed combustion chamber; 11, furnace charge charging aperture; 12, lime stone charging aperture; 13, secondary wind supply port; 14, scum pipe; 2, gas pressure compression apparatus; 3, combustion gas compression injector; 31, combustion gas block; 311, hole; 32, nozzle; 4, bed temperature sensor; 5, dilute-phase zone smoke density sensor; 6, emulsion zone smoke density sensor; 7, air-distribution device; 71, air distribution plate; 72, air compartment; 73, wind supply port; 74, blast cap; 8, cyclone separator; 9, supply with chamber; 91, air supply port; 92, steam supply port; 93, water supply port; 94, thin grey outlet; 95, deduster; 10, fluidized bed exchanger.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to illustrate the present invention, but are not used for limiting scope of the present invention.
Shown in Fig. 1-2; Embodiment of the invention circulation fluidized-bed gas auxiliary combustion equipment comprises fluidized bed combustion chamber 1, gas pressure compression apparatus 2 and combustion gas compression injector 3; This gas pressure compression apparatus 2 communicates with fluidized bed combustion chamber 1 through pipeline, in fluidized bed combustion chamber 1, feeds combustion gas.Combustion gas compression injector 3 is installed on the top of this pipeline.In the present embodiment, gas pressure compression apparatus 2 is a compressor, and through after the compressor compresses and the combustion gas that is passed in the fluidized bed combustion chamber 1 be biogas, natural gas or coal bed gas etc.
This combustion gas compression injector 3 is made up of combustion gas block 31, nozzle 32, magnetic valve and control board of electromagnetic valve.This nozzle 32 adopts the refractory ceramics nozzle.Magnetic valve is connected with the control board of electromagnetic valve circuit with nozzle 32 respectively, controls the unlatching of magnetic valve and the aperture that magnetic valve is opened by control board of electromagnetic valve, and then the injection flow of control combustion gas.In order to prevent that fuel from resulting in blockage to nozzle 32; At the top of nozzle combustion gas block 31 is installed; This combustion gas block 31 has endoporus, perforate 311 on the sidewall of combustion gas block, and its perforate direction is inclined upwardly; More excellent ground; Perforate 311 directions 45 degree that are inclined upwardly are set, increase perturbation action, spray into a wind reciprocation of fluidized bed combustion chamber 1 with horizontal direction to fuel; Can make that material evenly burns, make high-temperature gas and fuel in the recirculating fluidized bed that strong energy exchange take place.
In addition, bed temperature sensor 4 is installed in the bottom of fluidized bed combustion chamber 1, is used for the furnace temperature of perception fluidized bed combustion chamber 1 internal combustion discarded object, and this bed temperature sensor 4 is connected with control board of electromagnetic valve.After furnace charges such as inserting half-driedization mud in the fluidized bed combustion chamber 1 is lighted a fire; By the furnace temperature in bed temperature sensor 4 perception fluidized bed combustion chamber this moment 1; When this furnace temperature is lower than setting value (for example 850 ℃); This bed temperature sensor 4 sends signal to control board of electromagnetic valve; Control board of electromagnetic valve control magnetic valve is opened; Spray combustion-supporting through nozzle to fluidized bed combustion chamber 1 through the combustion gas after the high pressure compressed this moment; Improve the temperature in the fluidized bed combustion chamber 1 rapidly; Strengthen the perturbation action of gas, make that burning is more abundant furnace charge.
In addition, the upper and lower of fluidized bed combustion chamber 1 is installed dilute-phase zone sensor 5 and emulsion zone sensor 6 respectively, and it is connected with control board of electromagnetic valve respectively, is used for the flue gas particle density of perception fluidized bed combustion chamber 1 upper space and lower space.
Furnace charge burning in the fluidized bed combustion chamber 1 also can receive the influence (promptly receiving factor affecting such as particle speed, density) of fluidization quality.Experiment shows: good fired state, flue gas particle density ε s should remain between the 0.05-0.15.When emulsion zone smoke density sensor 6 collects ε s>0.15, then send a signal to control board of electromagnetic valve, the unlatching of control magnetic valve, injection combustion gas to fluidized bed combustion chamber 1 in; When emulsion zone smoke density sensor 6 collected ε s<0.05, control board of electromagnetic valve control magnetic valve reduced fuel gas injection, remains between the 0.05-0.15 until flue gas particle density ε s.
In the fluidized bed combustion chamber 1, because voidage is axially unbalanced with radial distribution, under the definite condition of gas-solid rerum natura and air velocity, fluidized bed combustion chamber 1 upper smoke aerated particle concentration is lower, is dilute-phase zone.When dilute-phase zone smoke density sensor 5 collected flue gas particle density ε s<0.05, the adjustment fuel gas injection made that the smoke density in the fluidized bed combustion chamber 1 is tending towards balanced.
Circulation fluidized-bed gas auxiliary combustion equipment provided by the invention; The inadequate problem of bringing in the time of can effectively solving the fuel (mud) that uses calorific value to be lower than 2500kcal/kg in the recirculating fluidized bed of burning; Under the situation of not adding fossil fuel; Feasible burning is more abundant; And desulfurization, to remove slag operation more easy, thereby realize clean burning; Simultaneously can effectively reduce emission of carbon-dioxide, reduce the vent gas treatment cost.In addition, the abundant burning of fuel in the fluid bed makes the fuel waste residue significantly reduce, and can effectively solve the waste residue landfill and take up an area of problem, and comprehensive benefit is good, meets the principle of Treatment of Sludge minimizing, innoxious, the utilization of resourcesization.
As shown in Figure 3; Embodiment of the invention combustion control system of circulating fluidized bed comprises above-mentioned circulation fluidized-bed gas auxiliary combustion equipment; Also comprise the bottom air-distribution device 7 and slag-drip opening 14 that are positioned at fluidized bed combustion chamber; Air-distribution device 7 comprises air distribution plate 71 and air compartment 72, and pipeline passes air distribution plate 71 and fluidized bed combustion chamber 1 internal communication; This air compartment 72 has wind supply port 73 one time, to air compartment 72 wind is provided one time, makes fuel reach fluidized state and required oxygen when supplying with burning through air distribution plate 71.A plurality of blast caps 74 that are used for to fluidized bed combustion chamber 1 inner bubbling air distribute on the air distribution plate 71.Fluidized bed combustion chamber 1 also has furnace charge charging aperture 11, lime stone charging aperture 12, secondary wind supply port 13; This secondary wind supply port 13 is to fluidized bed combustion chamber 1 supply secondary wind; Mainly play the effect of supplemental oxygen, strengthen the blending of furnace charge simultaneously and make that the temperature in the fluidized bed combustion chamber 1 is even.The top of fluidized bed combustion chamber 1 and middle part are communicated with cyclone separator 8 respectively, and after the furnace charge burning, the gas that has a large amount of high temp objects is through cyclone separator 8; Carrying out solid and gas separates; After solids is separated, reenter in the fluidized bed combustion chamber 1, guarantee furnace charge circulation repeated combustion.The bottom of fluidized bed combustion chamber 1 is communicated with fluidized bed exchanger 10.The other end of cyclone separator 8 connects supplies with chamber 9, supplies with on the chamber 9 to have air supply port 91, steam supply port 92 and water supply port 93, and the bottom of supplying with chamber connects thin grey outlet 94 and deduster 95.Gas through after cyclone separator 8 separation promptly gets into supply chamber 9, and its thin ash that carries will be discharged along with thin grey outlet 94.
Combustion control system of circulating fluidized bed provided by the invention makes that burning is more abundant, and desulfurization, to remove slag operation more easy, thereby realizes clean burning; Simultaneously can effectively reduce emission of carbon-dioxide, reduce the vent gas treatment cost.In addition, the abundant burning of fuel in the fluid bed makes the fuel waste residue significantly reduce, and can effectively solve the waste residue landfill and take up an area of problem, and comprehensive benefit is good, meets the principle of Treatment of Sludge minimizing, innoxious, the utilization of resourcesization.
Above embodiment only is used to illustrate the present invention; And be not limitation of the present invention; The those of ordinary skill in relevant technologies field; Under the situation that does not break away from the spirit and scope of the present invention; Can also make various variations and modification; Therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.

Claims (10)

1. a circulation fluidized-bed gas auxiliary combustion equipment comprises fluidized bed combustion chamber, it is characterized in that, also comprises: the gas pressure compression apparatus, and said gas pressure compression apparatus communicates with fluidized bed combustion chamber through pipeline, in fluidized bed combustion chamber, feeds combustion gas; Combustion gas compression injector is installed on the top of said pipeline.
2. circulation fluidized-bed gas auxiliary combustion equipment as claimed in claim 1 is characterized in that, said combustion gas compression injector is made up of combustion gas block, nozzle, magnetic valve and control board of electromagnetic valve, and said combustion gas block is enclosed within on the said nozzle; Said magnetic valve is connected with control board of electromagnetic valve with nozzle respectively.
3. circulation fluidized-bed gas auxiliary combustion equipment as claimed in claim 2 is characterized in that, said combustion gas block has endoporus, perforate on the sidewall of said combustion gas block, and its perforate direction is inclined upwardly.
4. circulation fluidized-bed gas auxiliary combustion equipment as claimed in claim 3 is characterized in that, said perforate direction be inclined upwardly 45 the degree.
5. circulation fluidized-bed gas auxiliary combustion equipment as claimed in claim 2 is characterized in that, bed temperature sensor is installed in the bottom of said fluidized bed combustion chamber, and said bed temperature sensor is connected with control board of electromagnetic valve.
6. circulation fluidized-bed gas auxiliary combustion equipment as claimed in claim 1 is characterized in that, dilute-phase zone smoke density sensor is installed on the top of said fluidized bed combustion chamber;
Emulsion zone smoke density sensor is installed in the bottom of said fluidized bed combustion chamber, and said dilute-phase zone smoke density sensor is connected with control board of electromagnetic valve respectively with emulsion zone smoke density sensor.
7. combustion control system of circulating fluidized bed; It is characterized in that; Comprise each described circulation fluidized-bed gas auxiliary combustion equipment of claim 1-6; Also comprise: the bottom of said fluidized bed combustion chamber has air-distribution device and slag-drip opening; Said air-distribution device comprises air distribution plate and air compartment, and said pipeline passes air distribution plate and communicates with the fluidized bed combustion chamber interior; Said air compartment has the wind supply port one time.
8. combustion control system of circulating fluidized bed as claimed in claim 7 is characterized in that, a plurality of blast caps that are used for to fluidized bed combustion chamber interior bubbling air distribute on the said air distribution plate.
9. combustion control system of circulating fluidized bed as claimed in claim 7 is characterized in that, said fluidized bed combustion chamber also has furnace charge charging aperture, lime stone charging aperture, secondary wind supply port.
10. combustion control system of circulating fluidized bed as claimed in claim 7 is characterized in that the top of said fluidized bed combustion chamber and middle part are communicated with cyclone separator respectively, and the bottom of said fluidized bed combustion chamber is communicated with fluidized bed exchanger; The other end of said cyclone separator connects supplies with chamber, has air supply port, steam supply port and water supply port on the said supply chamber, and the bottom of said supply chamber connects thin grey outlet and deduster.
CN2011102682444A 2011-09-09 2011-09-09 Gas combustion-supporting device of recirculating fluidized bed and combustion control device of recirculating fluidized bed CN102353044A (en)

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CN103363516A (en) * 2013-08-01 2013-10-23 东方电气集团东方锅炉股份有限公司 Circulating fluidized bed boiler with second reheaters
CN104456557A (en) * 2014-11-28 2015-03-25 桑德环境资源股份有限公司 Gas burner system for household garbage incinerator
CN105509040A (en) * 2014-09-27 2016-04-20 华能泰安众泰发电有限公司 Anti-blocking transformation method of material returner fluidization wind pipe
CN110397915A (en) * 2018-04-25 2019-11-01 诚实机械(株) Fluidized-bed combustion boiler air circulation spray nozzle device

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CN103363517A (en) * 2013-08-01 2013-10-23 东方电气集团东方锅炉股份有限公司 Circulating fluidized bed boiler with high bed temperature and with steam parameter of 700 DEG C and above
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CN105509040A (en) * 2014-09-27 2016-04-20 华能泰安众泰发电有限公司 Anti-blocking transformation method of material returner fluidization wind pipe
CN104456557A (en) * 2014-11-28 2015-03-25 桑德环境资源股份有限公司 Gas burner system for household garbage incinerator
CN110397915A (en) * 2018-04-25 2019-11-01 诚实机械(株) Fluidized-bed combustion boiler air circulation spray nozzle device

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