CN104482544A - CFB (circulating fluid bed) refuse incineration boiler air distribution system - Google Patents

CFB (circulating fluid bed) refuse incineration boiler air distribution system Download PDF

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Publication number
CN104482544A
CN104482544A CN201410757485.9A CN201410757485A CN104482544A CN 104482544 A CN104482544 A CN 104482544A CN 201410757485 A CN201410757485 A CN 201410757485A CN 104482544 A CN104482544 A CN 104482544A
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CN
China
Prior art keywords
air
burner hearth
feeding device
hearth body
secondary air
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.)
Pending
Application number
CN201410757485.9A
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Chinese (zh)
Inventor
蔡文钢
林雨
龚俊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Western Power Industrial Co Ltd
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China Western Power Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China Western Power Industrial Co Ltd filed Critical China Western Power Industrial Co Ltd
Priority to CN201410757485.9A priority Critical patent/CN104482544A/en
Publication of CN104482544A publication Critical patent/CN104482544A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23GCREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/44Details; Accessories

Abstract

The invention discloses a CFB (circulating fluid bed) refuse incineration boiler air distribution system, which comprises three air distribution paths, wherein the first path is a constant-pressure air chamber which is arranged inside the lower side of a health body and is connected with an ignition primary air passage, the second path is a secondary air passage which is arranged on the periphery of a conical section region of the hearth body and is connected with an air box, a spray opening of the secondary air passage is communicated to a position above an air distribution plate arranged inside the hearth body, the third path is an air supply opening formed in a refuse feeding device and a coal feeding device which are arranged above the lateral side of the hearth body, and the coal feeding device and the refuse feeding device are communicated to a position above the air distribution plate. Through the three paths of air inlet, refuse and coal can be sufficiently mixed with the air, the combustion is more sufficient, in addition, the burning uniformity and the temperature can be regulated through regulating the air inlet proportion of each path, and the sufficient, uniform, stable and flexible combustion of urban household refuse fuel can be realized.

Description

CFB garbage burning boiler cloth wind system
Technical field
The present invention relates to a kind of take house refuse as the boiler hearth of circulating fluidized bed cloth wind system of main fuel.
Background technology
Along with the development of Chinese society economy and the raising of living standards of the people, domestic waste gets more and more.The safe handling of domestic waste, has become an outstanding problem in modern social development.From the garbage disposal development course of developed country, garbage incineration technology has had harmless, decrement and the features such as resource.
Developed country due to its living standard high, rubbish quality is good, and incombustible thing is few, and moisture is few, is easy to distinguish, therefore American-European refuse-burning plant many employings fire grate combustion system.And China's most municipal refuse calorific value is low, it is good not that refuse classification work is done, a large amount of inorganic matter even stone has also been sent to burner hearth, affect boiler efficiency, therefore under rubbish high-moisture, low-calorie extreme condition, have in burning process supplementary high-quality fuel such as oil or natural gas, namely adopt multifuel combustion mode, operating cost is very high in this case; And the fuel of circulating fluid-bed combustion system multifuel combustion is in this case coal, coal is with low cost in China, so operating cost is low.Through facts have proved for many years, CFB garbage incineration technology mature and reliable, pollutant discharge amount is low, initial cost and maintenance cost low, with grate furnace ratio, there is obvious superiority.
But for high-moisture low heat value domestic waste, the design of numerous domestic boiler hearth of circulating fluidized bed does not all reach ideal effect, and the aspects such as combustion stability, ignition temperature equal control are all comparatively short of.
Summary of the invention
For the technical problem of above-mentioned existence, the invention provides a kind of CFB garbage burning boiler cloth wind system, can Three-dimensional cloth wind comprehensively, fuel is contacted more fully with oxygen.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of CFB garbage burning boiler cloth wind system, comprises three road cloth wind, the first via be burner hearth body lower inner arrange be connected isobaric air compartment with igniting air channel; Second tunnel is the secondary air duct be connected with bellows that described burner hearth body cone section region surrounding is arranged, above the spout sensible burner hearth body interior air distribution plate of described secondary air duct; 3rd tunnel be burner hearth body side arrange coal charging gear and garbage feeding device on air outlet; Described coal charging gear and garbage feeding device pass to above air distribution plate.Described secondary air duct comprise be arranged on that burner hearth body cone section is connected with bellows upper, in two-layer Secondary Air is female manages; Secondary Air female pipe ring in described upper strata is around in burner hearth body surrounding, and the spout on it is arranged at front and rear wall, and the spout interlaced arrangement on front and rear wall; Secondary Air female pipe in described middle level is arranged on burner hearth body left and right sidewall and rear wall, and the spout on it is arranged at left and right sidewall, and in the layout that liquidates.Three road air intakes make rubbish and coal fully can mix with air, burn more abundant.And the ratio of adjustment second road air intake and first via air intake can be passed through, the uniformity of adjustment burning and temperature.By adjusting stove combustion to burner hearth four direction, differing heights disturbance, thus make incineration firing more abundant.Do not mix the pure burning rubbish of coal under can accomplishing extreme case, greatly reduce operating cost
Improve as one, described upper, in the female pipe of two-layer Secondary Air is provided with damper.For controlling aspiration pressure and flow at any time according to the situation of burner hearth.
Improve as one, described garbage feeding device comprises the feeding lines be communicated with burner hearth, described feeding lines is provided with material inlet and air outlet, and described feeding lines comprises the inner and outer tubes be nested, and surrounds airtight cavity between described inner and outer tubes; Also comprise the cooling air inlet and cooling air outlet that communicate with cavity.For feeding lines arranges air-cooled structure, its temperature can be reduced, when preventing flue gas from playing a reversed role, burn out charging gear boiler inlet section.
Further improve as above-mentioned improvement, in described cavity, be provided with labyrinth.Needed for each protection zone of needs, absorb heat difference, adjustment labyrinth density, controls to distribute labyrinth air quantity, meets the heat absorption defencive function of regional.
Further improve as another kind, described cooling air inlet is arranged on feeding lines head, and cooling air outlet is arranged on feeding lines afterbody and communicates with burner hearth.The hot blast absorbing heat together enters in stove with garbage fuel as waste incineration wind.Also bring the heat of pipe in the material inlet of absorption into burner hearth in the lump when hot blast enters burner hearth, decrease the thermal loss of boiler, improve heat utilization efficiency.
Improve as one, upward, air outlet down for the charging aperture of described coal charging gear and garbage feeding device.Wind leaves when charging gear enters boiler and drives rubbish together to enter stove, promotes that garbage feeding is smooth and easy.
Improve as one, described coal charging gear boiler inlet position is positioned at the below of garbage feeding device boiler inlet position, and along boiler width direction, coal charging gear and garbage feeding device boiler inlet position interlaced arrangement, in triangle disposition.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of secondary air duct.
Fig. 3 is the female pipe top view of upper strata Secondary Air.
Fig. 4 is the female pipe top view of middle level Secondary Air.
Fig. 5 is the structural representation of garbage feeding device.
Fig. 6 is labyrinth expanded view.
Mark in figure: 1 burner hearth body, 2 garbage feeding devices, 3 coal charging gears, 4 secondary air ducts, 5 isobaric air compartments, 6 igniting air channels, 7 spouts, 9 air distribution plates, 10 charging apertures, 11 air outlets, 12 secondary hot-air imports, 13 hot wind inlet, 14 upper strata Secondary Air mother pipes, 15 middle level Secondary Air mother pipes, 16 arms, 17 dampers, 26 charging apertures, 27 air outlets, 28 cooling air inlets, 29 cooling air outlets, pipe in 30, 31 outer tubes, 32 cavitys, 33 front walls, wall after 34, 35 end walls, 36 headers.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figures 1 to 6, the present invention includes three road cloth wind, the first via be burner hearth body 1 lower inner arrange be connected isobaric air compartment 5 with igniting air channel 6; Second tunnel is the secondary air duct 4 be connected with bellows that described burner hearth body 1 section of cone region surrounding is arranged, above the inner air distribution plate 9 of spout 7 sensible burner hearth body 1 of described secondary air duct 4; 3rd tunnel be burner hearth body 1 side arrange coal charging gear 3 and garbage feeding device 2 on air outlet 27 and air outlet 11; Described coal charging gear 3 and garbage feeding device 2 pass to above air distribution plate.Upward, air outlet 27 and air outlet 11 are down for the charging aperture 26 of described coal charging gear 3 and garbage feeding device 2, charging aperture 10.Described coal charging gear 3 boiler inlet position is positioned at the below of garbage feeding device 2 boiler inlet position, and along boiler width direction, coal charging gear 3 and garbage feeding device 2 boiler inlet position interlaced arrangement, in triangle disposition.The present invention allows more oxygen enter burner hearth body 1 by three road air intakes, and Three-dimensional cloth wind.Burner hearth body 1 is sent on be divided into three tunnels of cold wind part after air preheater heating come from pressure fan: the first via, enters burner hearth body 1 end wall by a hot wind inlet 13 of isobaric air compartment 5; Second tunnel, enters burner hearth body 1 with the air outlet 11 of garbage feeding device 2 with fuel by the air outlet 27 of coal charging gear 3; 3rd tunnel, enters burner hearth by burner hearth body 1 section of the cone region secondary air duct 4 that four sides sidewall is arranged all around; During boiler operatiopn, according to rubbish supplied materials calorific value, moisture situation, fully adjustment one Secondary Air air flow rate proportioning, control combustion operating mode, ensures that hearth combustion is even.
Secondary air duct 4 comprises the female pipe 14 of upper strata Secondary Air, the female pipe 15 of middle level Secondary Air; Secondary Air female pipe 14 in described upper strata is surrounded on burner hearth body 1 surrounding, and the spout 7 on it is arranged at front and rear wall, and spout 7 interlaced arrangement on front and rear wall; Secondary Air female pipe 15 in described middle level is arranged on burner hearth body about 1 sidewall and rear wall, and the spout 7 on it is arranged at left and right sidewall, and in the layout that liquidates.Spout 7 is connected with Secondary Air female pipe 14 middle level female pipe 15 of Secondary Air by arm.The female pipe 15 of Secondary Air female pipe 14 middle level Secondary Air and arm 16 can install damper 17.The spout 7 of the female pipe 15 of middle level Secondary Air is upper and lower two-layer interlaced arrangement.The hot blast of secondary hot-air import 12 is divided into two-way, and a-road-through enters the female pipe 14 of upper strata Secondary Air, and a-road-through enters the female pipe 15 of middle level Secondary Air.Spout 7 front and rear wall of the female pipe 14 of upper strata Secondary Air interlocks cloth wind, and spout about 7 sidewall of the female pipe 15 of middle level Secondary Air liquidates cloth wind.Form four direction, the Three-dimensional cloth wind mode of three levels, makes rubbish fully contact with oxygen, finally makes burning more abundant.
Described garbage feeding device 2 comprises the feeding lines be communicated with burner hearth body 1, described feeding lines is provided with charging aperture 10 and air outlet 11; Feeding lines comprises the interior pipe 30 and outer tube 31 that are nested, surrounds airtight cavity 32 between described interior pipe 30 and outer tube 31; Labyrinth is provided with in described cavity 32; Also comprise the cooling air inlet 28 and cooling air outlet 29 that communicate with cavity 32.Cooling air inlet 28 is arranged on feeding lines 1 head, and cooling air outlet 29 is arranged on feeding lines afterbody and communicates with burner hearth body 1.Feeding lines and burner hearth body 1 wall are that 55 ° of angles tilt to enter burner hearth body 1.Air outlet 11 passes into hot-air blowing rubbish, prevents rubbish from blocking in pipe, plays garbage drying simultaneously, is convenient to rubbish and enters ablaze effect as early as possible after stove.A large amount of high-pressure hot wind flows into burner hearth in the same way with rubbish simultaneously, can prevent furnace high-temperature flue gas from moving back to from charging gear the hidden danger causing fire in power plant stove.In cavity 32, pass into cold wind by cooling air inlet 28, cool by heat radiation direct in stove and pipe 30 in hot washing away, play pipe 30 in protection and prevent the effect of overtemperature; Meanwhile, because rubbish is the heterogeneous mixture of multiple discarded object simple physical composition, the feature of composition, granularity, combustion characteristics inhomogeneities determines its burning and has unstability, there is the possibility of detonation in stove.In order to prevent detonation, the temperature that this air-cooled structure effectively can reduce charging gear inside being set, playing the effect preventing from flame from playing a reversed role burning out feed top equipment to a certain extent.Cold wind is back in burner hearth body 1 by cooling air outlet 29, decreases the thermal loss of boiler, improve heat utilization efficiency after absorbing heat.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (7)

1. a CFB garbage burning boiler cloth wind system, is characterized in that: comprise three road cloth wind, the first via be burner hearth body lower inner arrange be connected isobaric air compartment with igniting air channel; Second tunnel is the secondary air duct be connected with bellows that described burner hearth body cone section region surrounding is arranged, above the spout sensible burner hearth body interior air distribution plate of described secondary air duct; 3rd tunnel be burner hearth body front arrange coal charging gear and garbage feeding device on air outlet; Described coal charging gear and garbage feeding device pass to above air distribution plate; Described secondary air duct comprise be arranged on that burner hearth body cone section is connected with bellows upper, in two-layer Secondary Air is female manages; Secondary Air female pipe ring in described upper strata is around in burner hearth body surrounding, and the spout on it is arranged at front and rear wall, and the spout interlaced arrangement on front and rear wall; Secondary Air female pipe in described middle level is arranged on burner hearth body left and right sidewall and rear wall, and the spout on it is arranged at left and right sidewall, and in the layout that liquidates.
2. a kind of CFB garbage burning boiler cloth wind system according to claim 1, is characterized in that: described upper, in the female pipe of two-layer Secondary Air is provided with damper.
3. a kind of CFB garbage burning boiler cloth wind system according to claim 1, it is characterized in that: described garbage feeding device comprises the feeding lines be communicated with burner hearth, described feeding lines is provided with material inlet and air outlet, described feeding lines comprises the inner and outer tubes be nested, and surrounds airtight cavity between described inner and outer tubes; Also comprise the cooling air inlet and cooling air outlet that communicate with cavity.
4. a kind of CFB garbage burning boiler cloth wind system according to claim 3, is characterized in that: be provided with labyrinth in described cavity.
5. a kind of CFB garbage burning boiler cloth wind system according to claim 3, it is characterized in that: described cooling air inlet is arranged on feeding lines head, cooling air outlet is arranged on feeding lines afterbody and communicates with burner hearth.
6. a kind of CFB garbage burning boiler cloth wind system according to claim 1, is characterized in that: upward, air outlet down for the charging aperture of described coal charging gear and garbage feeding device.
7. a kind of CFB garbage burning boiler cloth wind system according to claim 1, it is characterized in that: described coal charging gear boiler inlet position is positioned at the below of garbage feeding device boiler inlet position, along boiler width direction, coal charging gear and garbage feeding device boiler inlet position interlaced arrangement, in triangle disposition.
CN201410757485.9A 2014-12-12 2014-12-12 CFB (circulating fluid bed) refuse incineration boiler air distribution system Pending CN104482544A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410757485.9A CN104482544A (en) 2014-12-12 2014-12-12 CFB (circulating fluid bed) refuse incineration boiler air distribution system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410757485.9A CN104482544A (en) 2014-12-12 2014-12-12 CFB (circulating fluid bed) refuse incineration boiler air distribution system

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008112345A1 (en) * 2007-03-13 2008-09-18 Alstom Technology Ltd Secondary air flow biasing apparatus and method for circulating fluidized bed boiler systems
CN101725965A (en) * 2008-10-21 2010-06-09 神华集团有限责任公司 High-temperature fume furnace of circulating fluidized bed and control method thereof
CN202546746U (en) * 2012-02-23 2012-11-21 无锡华光锅炉股份有限公司 Coal supplying device of circulating fluidized bed boiler
CN202598495U (en) * 2012-05-28 2012-12-12 无锡东马锅炉有限公司 Biomass circulating fluidized bed boiler
CN202675271U (en) * 2012-07-03 2013-01-16 杭州海陆重工有限公司 Low-nitrogen combustion device for circulating fluidized bed
CN203464262U (en) * 2013-09-05 2014-03-05 无锡华光锅炉股份有限公司 Circulating fluidized bed boiler for combusting palm dreg
CN204388082U (en) * 2014-12-12 2015-06-10 华西能源工业股份有限公司 CFB garbage burning boiler cloth wind system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008112345A1 (en) * 2007-03-13 2008-09-18 Alstom Technology Ltd Secondary air flow biasing apparatus and method for circulating fluidized bed boiler systems
CN101725965A (en) * 2008-10-21 2010-06-09 神华集团有限责任公司 High-temperature fume furnace of circulating fluidized bed and control method thereof
CN202546746U (en) * 2012-02-23 2012-11-21 无锡华光锅炉股份有限公司 Coal supplying device of circulating fluidized bed boiler
CN202598495U (en) * 2012-05-28 2012-12-12 无锡东马锅炉有限公司 Biomass circulating fluidized bed boiler
CN202675271U (en) * 2012-07-03 2013-01-16 杭州海陆重工有限公司 Low-nitrogen combustion device for circulating fluidized bed
CN203464262U (en) * 2013-09-05 2014-03-05 无锡华光锅炉股份有限公司 Circulating fluidized bed boiler for combusting palm dreg
CN204388082U (en) * 2014-12-12 2015-06-10 华西能源工业股份有限公司 CFB garbage burning boiler cloth wind system

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Application publication date: 20150401