CN201852108U - Vertical domestic garbage incinerator combustion system applicable to power generation - Google Patents

Vertical domestic garbage incinerator combustion system applicable to power generation Download PDF

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Publication number
CN201852108U
CN201852108U CN 201020587685 CN201020587685U CN201852108U CN 201852108 U CN201852108 U CN 201852108U CN 201020587685 CN201020587685 CN 201020587685 CN 201020587685 U CN201020587685 U CN 201020587685U CN 201852108 U CN201852108 U CN 201852108U
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China
Prior art keywords
air
heat boiler
flue
waste heat
flue gas
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Expired - Lifetime
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CN 201020587685
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Chinese (zh)
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江晓华
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SHENZHEN JINGJI ENVIRONMENTAL PROTECTION EQUIPMENT CO Ltd
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SHENZHEN JINGJI ENVIRONMENTAL PROTECTION EQUIPMENT CO Ltd
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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
    • Y02E20/12Heat utilisation in combustion or incineration of waste

Abstract

The utility model relates to a vertical domestic garbage incinerator combustion system applicable to power generation, which comprises a vertical rotary incineration pyrolysis gasification furnace, a continuous feeding device and a deslagging machine, wherein a flue gas outlet of the vertical rotary incineration pyrolysis gasification furnace is connected with a second combustion chamber by a transition flue; a flue gas outlet of the second combustion chamber is connected with a flue-type waste heat boiler; a flue gas outlet of the waste heat boiler is connected with a tail gas purification device; a primary air fan is used for sending primary air into an air chamber at the bottom of the furnace by a primary air pipe; a first hot air pipeline led out from an air preheater is communicated with the primary air pipe by a primary air valve; a secondary air fan is used for sending secondary air into the transition flue by a secondary air pipe; a second hot air pipeline led out from the air preheater is communicated with the secondary air pipe by a secondary air valve; the waste heat boiler consists of a front membrane type wall channel and a tail flue; a tail heating surface comprises a superheater, an evaporation heating surface, a coal economizer and the air preheater; a flue gas outlet bypass of the waste heat boiler is provided with a flue gas recirculation pipeline; and the fans are used for leading part of flue gas to back flow to an inlet of the superheater. The vertical domestic garbage incinerator combustion system solves the problems of stable combustion and heat exchange.

Description

Be applicable to the vertical incinerator combustion system of house refuse of generating
Technical field
The utility model relates to the vertical incinerator combustion system of a kind of house refuse, especially relates to a kind of vertical rotating thermal decomposition furnace combustion system that is applicable to generating.
Background technology
Economic development and urban population increase and the garbage environment pollution that produces has caused social effects of pollution.The processing method of domestic waste has burns and sanitary landfills two big classes, and the latter has caused secondary pollution because of taking a large amount of soils and oozing drop liquid polluted underground water again.The external incineration treatment of garbage that adopts has mostly realized minimizing, innoxious, resource purpose.Garbage combustion device mainly contains three kinds: i.e. mechanical kiln grate furnace, Circulation fluidized-bed furnace and thermal decomposition furnace.It has two kinds of forms thermal decomposition furnace, and the one, horizontal, the disposal of refuse amount was 150t/d in maximum day, the 2nd, the vertical rotating formula, the design maximum throughput is 100t/d.Vertical rotating is burned pyrolysis gasification furnace because of a series of problems such as its device systems, especially for containing the domestic waste that moisture is big, calorific value is on the low side, does not arrive the specified treating capacity of design as yet safely and steadly, especially is not suitable for generating.
The technological process that vertical rotating is burned pyrolysis gasification furnace is:
Rubbish is grasped in the garbage pool by grab-crane and puts in the drying step-transit conveyor bell mouth at the vertical feed bin of incinerator top, in the process that in conveyer, moves forward by bottom hot blast heat drying; Finally fall in the vertical feed bin of incinerator.
Rubbish is constantly sent into rubbish in the incinerator through the continuous rotation of the two roller chargers in feed bin bottom, and lets go uniformly.Enter rubbish in the stove and be subjected in the body of heater from bottom to top high-temperature flue gas stream and photothermal effect, can heat up rapidly, drying, pyrolysis, gasification, burning.The mixed flue gas that produces enters dual firing chamber again, and fully burning is reduced to 200-300 ℃ after the waste heat recovery through the flue type residual heat boiler again under 900 ℃ ± 50 ℃ high temperature, enters exhaust treatment system at last.Tail gas purifies up to standard after chimney enters atmosphere by deacidify spray drying tower and sack cleaner and active carbon spraying system.
Burn the coking shape residue that produces and become the block below the 150mm to be expelled in the water sealed tank of furnace bottom, discharge through the wet type slag-tapping system through the rotary fire grate attrition crushing.
The steam that waste heat boiler produces enters female pipe and send the Turbo-generator Set generating.
Chinese patent 200710073251.2 discloses a kind of vertical life refuse heat decomposition incinerator, comprises the incinerator body, is hopper and adds feed bin that at incinerator body front end the rear end is a deslagging device; At hopper and add the feed bin front end feeding device is set; Described feeding device is a step-transit conveyor, mainly contains broach hopper, hopper, horizontal stepping plate, fluid pressure drive device and hot wind drying room and forms; The top of horizontal stepping plate connects broach hopper, and the below is provided with hot wind drying room; Horizontal stepping plate is driven by fluid pressure drive device, and step-by-step movement pushes discharging opening with rubbish.The hot wind drying room pipeline connects the flue gas air preheater in the incinerator body boiler back end ductwork.Go into the predrying of stokehold though it has solved rubbish, realize certain smooth combustion effect, still stable, controlled inadequately in the burning of incinerator and dual firing chamber, the vapor (steam) temperature that the heat exchange of waste heat boiler goes out is unstable more, is not suitable for generating.
The utility model content
The purpose of this utility model provides a kind of vertical incinerator combustion system of house refuse that is applicable to generating, solves vertical incinerator burning of house refuse and heat exchange instability, the problem that is unsuitable for generating electricity.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of vertical incinerator combustion system of house refuse that is applicable to generating, and it comprises vertical rotating burning pyrolysis gasification furnace (a combustion chamber), carries continuous-feeding device, the mucking machine of rubbish; The exhanst gas outlet that vertical rotating is burned pyrolysis gasification furnace connects dual firing chamber by transition flue duct, and the exhanst gas outlet of dual firing chamber connects the flue type residual heat boiler, and the exhanst gas outlet of waste heat boiler connects exhaust gas cleaner; It is characterized in that:
Described vertical rotating burn pyrolysis gasification furnace comprise vertically add feed bin, the continuous blanking machine of two roller, fixedly bell, turn round body of heater, can rotating convex fire grate, stove seat, turntable bearing and base.The bottom slag notch is provided with mucking machine.The air compartment of furnace bottom sent into a wind (cold wind) by airduct by primary air fan.Draw the first hot-air pipeline from air preheater and be communicated with an air pipe line through an air-valve.Overfire air fan is sent secondary wind (cold wind) into transition flue duct by the secondary air channel road, draws the second hot-air pipeline from air preheater and is communicated with the secondary air channel road through the secondary air-valve.In the dual firing chamber bottom assisted combustion device is set also, comprises the complementary fuel ank of burner and connection.
Described waste heat boiler adopts single drum Natural Circulation structure, is made up of anterior membrane wall passage and back-end ductwork, and back-end surfaces comprises superheater, evaporating heating surface, economizer and air preheater.Exhanst gas outlet bypass at waste heat boiler is provided with the flue gas recirculation pipeline, by gas recirculating fan partial fume is back to the superheater inlet, regulates the superheater inlet flue gas temperature.
The beneficial effects of the utility model: regulate furnace temperature owing to mending into controlled hot and cold air and assisted combustion device is set in dual firing chamber in a combustion chamber, dual firing chamber, and adjust a combustion chamber rubbish and go into the stove amount, make more controlled, the flameholding of combustion system burning of the vertical incinerator of house refuse.Further adopt flue gas recirculation to regulate flue-gas temperature before the superheater of waste heat boiler, the vapor (steam) temperature that makes the heat exchange of waste heat boiler go out is more stable.Solved the difficult problem that the vertical incinerator of house refuse is used to generate electricity.
Below with reference to drawings and Examples, the utility model is carried out comparatively detailed explanation.
Description of drawings
Fig. 1 is the utility model embodiment organigram.
The specific embodiment
Embodiment 1, as shown in Figure 1, a kind of vertical incinerator combustion system of house refuse that is applicable to generating, it comprises vertical rotating burning pyrolysis gasification furnace 1, carries continuous-feeding device 2, the mucking machine 3 of rubbish.The exhanst gas outlet that vertical rotating is burned pyrolysis gasification furnace 1 connects dual firing chamber 5 by transition flue duct 4, and the exhanst gas outlet connection of dual firing chamber is provided with flue type residual heat boiler 6, and the exhanst gas outlet connection of waste heat boiler 6 is provided with exhaust gas cleaner 7.
Described vertical rotating burn pyrolysis gasification furnace 1 comprise vertically add feed bin 11, the continuous blanking machine of two roller, fixedly bell 12, turn round body of heater 13, can rotating convex fire grate, stove seat, turntable bearing and base 14.The bottom slag notch is provided with the arm-type mucking machine 3 of hydraulic pressure bucket.The air compartment of furnace bottom sent into a wind (cold wind) by airduct 16 by primary air fan 15.Draw the first hot-air pipeline 81 from air preheater 8 (comprising air preheat blower fan 85) and be communicated with an air pipe line 16 through an air-valve 82.Overfire air fan 41 is sent secondary wind (cold wind) into transition flue duct 4 by secondary air channel road 42, draws the second hot-air pipeline 83 from air preheater 8 and is communicated with secondary air channel road 42 through secondary air-valve 84.In dual firing chamber 5 bottoms assisted combustion device is set also, it comprises burner 51 and the complementary fuel ank 52 that is communicated with.
Concrete, each unit architecture that vertical rotating is burned pyrolysis gasification furnace is:
The described feed bin that adds is a upright case structure spare, and it is that rubbish enters the interior passage of stove, is again the place of temporary rubbish.The rubbish that the work fashionable dress is gone in the feed bin accounts for more than 1/2 of whole feed bin height, and the flue gas that can intercept in the stove overflows in feed bin, guarantees the stable of the interior negative pressure of stove simultaneously.Two roller tooth feeders are contained in the bottom of feed bin, and the driving by reductor is slowly rotated two rollers the rubbish in the feed bin is dropped in the stove continuously equably.
Described fixedly bell is made up of box water girder construction, and the fire-resistant bed of material of building is built in bell bottom, arranges that above adding feed bin and two roller chargers, exhanst gas outlet and incinerator recirculated water imports and exports interface and fire exploring hole (bed of material), peep-hole.The bell bottom is provided with two layers of water seal circle, interior side sealing intercepts inner flue gas of the stove, outer side sealing intercepts the stove outer air, be the cavity area between two water seal circles, and be heated steam that the back produces of rotating furnace water jacket is outdoor by the conduit derivation that conduit imports behind the cavity area from the bell.For preventing the high-temperature flue gas acid corrosion of water seal circle, the water seal circle adopts stainless steel 1Cr13 material to make.
Described revolution body of heater is a upright cylindrical structure.Is made up of upper of furnace body, body of heater middle part, body of heater bottom, upper of furnace body is burner hearth part (flue gas flow through layer), and the middle part is drying garbage pyrolytic gasification, oxidizing fire and after-flame part, and the body of heater bottom is slag layer and discharge section.The upper of furnace body shell is a carbon steel, interior block fire resistant heat preserving heat-barrier material, and inside and outside two water sealed tanks are arranged at the top, and two water seal circles on the bell insert in this two water sealed tank, annotate to go up water to cut off the burner hearth flue gas and emerge or the stove outer air is scurried into burner hearth to water sealed tank.Two water sealed tanks middle part has the conduit of two furnace water jackets the steam in the water jacket of body of heater bottom can be imported cavity band between two water seal circles of bell.For preventing that water sealed tank is subjected to the acid corrosion of flue gas, water sealed tank is made with the 1Cr13 stainless steel.The body of heater bottom is the water leg structure, uses demineralized water cooling body of heater, and interior cover material is the 20G material, and overcoat is a carbon steel.Water jacket water is imported by overflow by the outer side sealing of body of heater, and the steam that produces when being heated is discharged by the cavity between the two water seal circles of two water sealed tanks of conduit importing upper of furnace body and bell below and by the conduit on the bell.Also be provided with slag resistance slag plate, slag-discharging device in the interior cover, be expelled to the taper receipts ash bucket of fire grate below by the extruding of convex travelling grate.
Described convex fire grate is made up of eccentric cap, break plate (grate bars plate), awl gear ring, support, central shaft, center cover for seat, bearing and Bevel Gear Transmission reductor.It is the core of incinerator continous-stable operation, plays supporting material, rotary slagging coutrol and even distributing wind.It is contained in the bottom of rotating furnace, pass through during work to rotate slowly, first effect by eccentric cap and eccentric screen is extruded into stenosis with slag and is broken by the extruding with the body of heater lower inner wall, discharge the gap between grate bars plate under the barrier effect of slag-discharging device on body of heater, the taper that drops to its below is received on the ash bucket.
Described stove seat and turntable are by tubular body of heater seat and turn round the bull gear turntable bearing, drive reductor, supporting base etc. forms.Tubular body of heater seat is the intermediate member that connects body of heater and turntable shaft bearing, is made up of carbon steel.Turntable bearing is the cylinder roller bearing structure, it is big to hold the power of cutting, stability of rotation, bearing outer ring and gear ring are made of one, slowly rotate by the little gear ring driving of reductor bull gear drive stove seat and body of heater, the rubbish that fixing bell blanking port is fallen in the stove is evenly let go, to keep the relatively stable of inner operating.
Described air compartment, slag tap water sealed tank and hydraulic pressure mucking machine are made up of steel parapet gutter and the arm-type mucking machine of hydraulic pressure bucket.Establish one time the wind air inlet in the middle of the tank.The taper ash bucket of body of heater bottom inserts in the water sealed tank, and airduct passes from the center of taper ash bucket and enters air compartment.The slag that falls falls in the water from the gap between ash bucket and the wind vertical tube, is deposited to arc slag chute bottom, is discharged by the arm-type mucking machine of hydraulic pressure bucket.
Described transition flue duct and secondary combustion chamber: transition flue duct and dual firing chamber's lower case are made up of steel frame construction spare, the fire-resistant pouring material of interior block.Overfiren air port is driveed near four the body of wall angles in the transition flue duct both sides at dual firing chamber smoke inlet place and bottom.Dual firing chamber's interface dimensions is 3050 * 3050mm, is a square-section, divides two parts up and down.Top is made in the membrane wall cavity of waste heat boiler membrane wall thorax below, and the bottom is seated on the waste heat boiler supporting steelframe.Upper expansion is extended downwards, and lower expansion extends upward, and the seam between the top and the bottom is a dilatation seams.The flue gas that enters in the dual firing chamber begins to form turbulent flow by the wind action of different parts secondary from the bottom, and makes the flammable composition after-flame in the flue gas.
Described waste heat boiler 6 adopts single drum Natural Circulation structure, is made up of anterior membrane wall passage and back-end ductwork, and back-end surfaces comprises superheater 61, evaporating heating surface 62, economizer 63 and air preheater 8.Exhanst gas outlet bypass at waste heat boiler 6 is provided with flue gas recirculation pipeline 9, by gas recirculating fan 10 partial fume is back to superheater 61 inlets, regulates the superheater inlet flue gas temperature.
The waste heat boiler framework adopts all steel framework, comprising:
(1) drum and water separator
The drum internal diameter is 1400mm, and wall thickness is 40mm, and drum straight section length is about 5300mm, and material is 20G (No. 20 steel).Adopt the single hop vapo(u)rization system in the pot.Be furnished with internal units such as cyclone separator, screen separator, surface blow-off pipe, chemical feed pipe in the drum.
(2) anterior membrane wall passage
Adopt between anterior membrane wall passage and the dual firing chamber to flexibly connect, to reach sealing and to absorb the effect that expands, the fireproof heat-insulating layer is laid in the passage bottom.Membrane wall adopts Material is the pipe of 20G, and pitch is 100mm.
(3) superheater and vapor (steam) temperature are regulated
Superheater is arranged in the top of back-end ductwork, is furnished with high temperature level, middle temperature level, three grades of heat-exchange tubes of low temperature level along the flue gas flow direction, and adopts the flue gas recirculation technique of backflow.Control the high temperature superheater entrance flue gas temperature at 570-620 ℃, and when flue-gas temperature surpasses 630 ℃, adopt the secondary spray desuperheating, the protection pipe.The superheater steam exit temperature is 400 ℃; The high temperature level adopts Pipe, middle temperature level, low temperature level adopt Pipe, material are 12Cr1MoVG/GB5310.Main feedwater and spray desuperheating hydromining are regulated with electric control valve.
(4) evaporating heating surface
After evaporating heating surface is arranged in superheater, adopt , material is the pipe of 20G.
(5) economizer
After economizer was arranged in evaporating heating surface, pipe was to arrange along row, adopts Material is 20G, pipe.
(6) air preheater
After air preheater is arranged in economizer, adopt channel structure, pipe adopts corrosion-resistant steel pipe (specification ).Hot-air is used for the rubbish on primary and secondary air or the dry stepping conveyer.Air preheater outlet air temperature>150 ℃.
(7) waste heat boiler scope interior conduit
Feed main is divided into three the tunnel before entering waste heat boiler, goes to boiler, one-level attemperator and secondary attemperator respectively, regulates respectively by three electric control valves.
Waste heat boiler also is equipped with supervision, the control device of various necessity, as water gage, equalizing reservoir etc.
A spring loaded safety valve respectively is housed on drum and super-heater exit case, and each section of superheated steam is equipped with the thermocouple socket; Be respectively equipped with air valve and blowoff valve at the boiler highs and lows; Safety valve and muffler (three in every stove) is housed respectively on empty air bleeding valve; For supervision feedwater, stove water and steam quality, be equiped with feedwater, stove water, saturated vapor and superheated steam probe tube.
(8) furnace wall and sealing
Anterior membrane wall passage and furnace roof adopt tube, and back-end ductwork adopts furnace wall to add the metal lagging structure; Anterior membrane wall passage and furnace roof outer casing adopt corrugated sheet steel.Drum, collection case and steam-water pipe are adorned with the aluminium suitcase after adopting external rock wool heat-preservation.The furnace wall that anterior membrane wall structure and back-end ductwork adopt adds the metal lagging structure and can guarantee that flue gas does not leak outside.For making the boiler safety reliability service, boiler is provided with the many places expansion gear, is equipped with expansion guide on each layer of incinerator buckstay, and boiler is expanded along expansion gear.

Claims (2)

1. vertical incinerator combustion system of house refuse that is applicable to generating, it comprises that vertical rotating burns pyrolysis gasification furnace, carries the continuous-feeding device and the mucking machine of rubbish; The exhanst gas outlet that vertical rotating is burned pyrolysis gasification furnace connects dual firing chamber by transition flue duct, and the exhanst gas outlet of dual firing chamber connects the flue type residual heat boiler, and the exhanst gas outlet of waste heat boiler connects exhaust gas cleaner; It is characterized in that:
Described vertical rotating burn pyrolysis gasification furnace comprise vertically add feed bin, the continuous blanking machine of two roller, fixedly bell, turn round body of heater, can rotating convex fire grate, stove seat, turntable bearing and base; The bottom slag notch is provided with mucking machine; The air compartment of furnace bottom sent into wind by airduct by primary air fan; Draw the first hot-air pipeline from air preheater and be communicated with an air pipe line through an air-valve; Overfire air fan is sent secondary wind into transition flue duct by the secondary air channel road, draws the second hot-air pipeline from air preheater and is communicated with the secondary air channel road through the secondary air-valve;
Described waste heat boiler adopts single drum Natural Circulation structure, is made up of anterior membrane wall passage and back-end ductwork, and back-end surfaces comprises superheater, evaporating heating surface, economizer and air preheater; Exhanst gas outlet bypass at waste heat boiler is provided with the flue gas recirculation pipeline, by gas recirculating fan partial fume is back to the superheater inlet.
2. the vertical incinerator combustion system of house refuse as claimed in claim 1 is characterized in that: described dual firing chamber bottom also is provided with assisted combustion device, and it comprises the fuel tank of burner and connection.
CN 201020587685 2010-11-02 2010-11-02 Vertical domestic garbage incinerator combustion system applicable to power generation Expired - Lifetime CN201852108U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101963356A (en) * 2010-11-02 2011-02-02 深圳京基环保设备有限公司 Combustion system of vertical incinerator for household refuse suitable for power generation and control method thereof
CN104033605A (en) * 2014-06-18 2014-09-10 上海绿晖环保科技有限公司 Household garbage incineration waste heat boiler and header sealing device thereof
CN106247347A (en) * 2016-08-30 2016-12-21 江苏太湖锅炉股份有限公司 Refuse incineration exhaust-heating boiler
CN109882847A (en) * 2018-12-26 2019-06-14 安徽尘缘节能环保科技有限公司 A kind of automation oxygenation boiler improving organic compound efficiency of combustion

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101963356A (en) * 2010-11-02 2011-02-02 深圳京基环保设备有限公司 Combustion system of vertical incinerator for household refuse suitable for power generation and control method thereof
CN104033605A (en) * 2014-06-18 2014-09-10 上海绿晖环保科技有限公司 Household garbage incineration waste heat boiler and header sealing device thereof
CN104033605B (en) * 2014-06-18 2016-08-24 上海绿晖环保科技有限公司 The collection box seal device of domestic garbage incineration waste heat boiler and domestic garbage incineration waste heat boiler
CN106247347A (en) * 2016-08-30 2016-12-21 江苏太湖锅炉股份有限公司 Refuse incineration exhaust-heating boiler
CN109882847A (en) * 2018-12-26 2019-06-14 安徽尘缘节能环保科技有限公司 A kind of automation oxygenation boiler improving organic compound efficiency of combustion

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Granted publication date: 20110601

Effective date of abandoning: 20120530