CN102721041B - Online low-nitrogen oxygen-rich combined combustion energy-saving system - Google Patents

Online low-nitrogen oxygen-rich combined combustion energy-saving system Download PDF

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Publication number
CN102721041B
CN102721041B CN2012102081540A CN201210208154A CN102721041B CN 102721041 B CN102721041 B CN 102721041B CN 2012102081540 A CN2012102081540 A CN 2012102081540A CN 201210208154 A CN201210208154 A CN 201210208154A CN 102721041 B CN102721041 B CN 102721041B
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coal
layer sleeve
pipe
air
screw rod
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CN102721041A (en
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魏大山
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SHAANXI PANLONG INDUSTRIAL CO., LTD.
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魏大山
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    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The invention discloses an online low-nitrogen oxygen-rich combined combustion energy-saving system. The system comprises a pretreatment comprehensive coal hopper which is mounted on a chain-type coal firing boiler, feeds the raw coal in layers and in rows into a chain-type coal firing boiler grate and sorting powdery coal on line; a drying/preheating heat exchanger for drying and delivering the powdery coal which is sorted by the pretreatment comprehensive coal hopper and preheating the air; a coal powder fine-sorting device connected with the drying/preheating heat exchanger and used for finely sorting the powdery coal which is dried by the drying/preheating heat exchanger; and a low-nitrogen oxygen-rich coal powder combustor used for feeding the high-quality coal powder which is finely sorted by the coal powder fine-sorting device into the chain-type coal firing boiler grate. The online low-nitrogen oxygen-rich combined combustion energy-saving system has the advantages of simple structure, reasonable design and good use effect; can treat inferior coal on line to obtain the energy-saving modification technique with the optimum use effect while minimizing the minimum cost, can increase the utilization efficiency of inferior coal, reduce the waste of energy and reduce the use cost.

Description

Online low nitrogen oxygen enrichment compound combustion energy conserving system
Technical field
The present invention relates to a kind of energy-saving combustion system, especially relate to a kind of online low nitrogen oxygen enrichment compound combustion energy conserving system.
Background technology
Raw coal is one of Chinese main energy sources, and at present Chinese festiva consumes 3,300,000,000 tons of left and right of raw coal, and still keeps take the speedup that annual growth is 1% to increase.So a large amount of raw coal that use, make the quantity of the raw coal (thermal coal) of suitable direct burning reduce year by year, and according to statistics, the total coal reserves medium power coal of China accounts for 1/3, and colm (containing gangue) accounts for 2/3.For this reason, keep coal resource to continue to use, guarantee national sustained economic development, good burning environment of inferior quality coal system just must be arranged.
Mainly advocate in recent years clean coal technology, and clean coal technology fuel cost and operating cost have been increased, can't solve national policy energy-conserving and environment-protective reduction of discharging and user are reduced costs to the contradiction between demand.In addition existing in equipment being had relatively high expectations by quality of fuel, be difficult to adapt to ature of coal and significantly change the impact that brings combustion status deteriorates.For this reason, the active service boiler is used colm just to seem particularly important through energy saving technical reconstruction.
Coal dust is a kind of type of service of raw coal fuel, and it can the atomization suspension, form efficient burning on the chain type fire coal Industrial Boiler of High Rotation Speed.Utilize quick, the sufficient characteristics of coal dust firing, its combustion technology is applied on the traveling-grate stoker coal-burning boiler, have like this two kinds of combustion systems on the traveling-grate stoker coal-burning boiler, i.e. grate firing (raw coal on chain) and chamber combustion (coal dust of suspension) coexists in same burner hearth, is called compound combustion.
The compound combustion of clean coal technology is one of major technique solved burning environment of inferior quality coal, and compound combustion takes full advantage of furnace cavity, has alleviated the fire grate thermic load, has improved fire box temperature, has improved the thermal efficiency, has increased considerably burner hearth and has exerted oneself.But existing compound burning technology can not be realized the online sorting to raw coal, online pre-heating drying milled processed and online powder process pulverized coal conveying burning etc., fuel cost and operating cost have been increased like this, solution energy-conserving and environment-protective that can not be good and the contradiction between integrated cost.
In addition, country also supports the electric power stations near coal-mines of the fluidized bed combustion coal burning boiler of development burning gangue to deal with this present situation energetically at present, but Industrial Boiler and the power boiler of a large amount of active service surrounding cities can not be replaced fully, and the replacement cycle at least needs 20 years.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency of the prior art, a kind of online low nitrogen oxygen enrichment compound combustion energy conserving system is provided, it is simple in structure, reasonable in design and result of use is good, can process online colm, obtain the reducing energy consumption of best result of use with minimum cost, can improve the service efficiency of colm, reduce energy waste, reduce use cost.
For achieving the above object, the technical solution used in the present invention is: a kind of online low nitrogen oxygen enrichment compound combustion energy conserving system, it is characterized in that: comprise being arranged on chain coal burning boiler and raw coal layered being sent into to chain coal burning boiler fire grate the comprehensive coal bunker of pretreatment of online sorting smalls and the smalls that the comprehensive coal bunker of described pretreatment is sorted out in lines and dried, carry the also drying and forewarm heat exchanger of preheated air, and join with the drying and forewarm heat exchanger and the smalls that the drying and forewarm heat exchanger is dried carried out to the coal dust refining separation device of refinement sorting and the super sea coal after described coal dust refining separation device refinement sorting is sent into to the low nitrogen oxygen enriched powdered coal burner of chain coal burning boiler burner hearth, described drying and forewarm heat exchanger is arranged on the outside of the comprehensive coal bunker of described pretreatment, described coal dust refining separation device is arranged on the below of drying and forewarm heat exchanger, described low nitrogen four-way coal burner is arranged on chain coal burning boiler, and described low nitrogen four-way coal burner all joins with drying and forewarm heat exchanger and described coal dust refining separation device.
Above-mentioned online low nitrogen oxygen enrichment compound combustion energy conserving system, it is characterized in that: the comprehensive coal bunker of described pretreatment comprises the coal bunker housing and is arranged on the coal-roller delivery group on the coal bunker housing, and is arranged on the coal bunker enclosure interior and sieves for the first coal flashboard of adjusting lower coal amount and the dynamic combined that is arranged on the first coal flashboard below and raw coal layered is sent on the chain coal burning boiler fire grate in lines; The bottom of described coal bunker housing is provided with observation panel, and the inside of described coal bunker housing is equipped with dividing plate and liner baffle plate, between described dividing plate and coal bunker housing, is provided with the flashboard AD; Described dynamic combined sieve comprises installing plate, one-level sieving plate, secondary sieving plate and coal groove, and for driving the vibrating mechanism of installing plate, one-level sieving plate, secondary sieving plate and the vibration of coal groove, described installing plate, one-level sieving plate, secondary sieving plate and coal groove all are arranged on the inside of coal bunker housing, described one-level sieving plate, secondary sieving plate and coal groove from top to bottom set gradually, and described secondary sieving plate and coal groove are installed on installing plate; Described vibrating mechanism comprises through the first installation shaft of coal bunker housing and the first baffle plate, second baffle, cam, the first rotating shaft and the first drive motors that are arranged on the coal bunker hull outside, described the first baffle plate, second baffle and one-level sieving plate are installed on the first installation shaft, be fixed with slide block on described the first installation shaft and near liner baffle position place, described slide block is used in conjunction with the guide rail be fixed on the liner baffle plate; Described cam is arranged between the first baffle plate and second baffle and is arranged on an end of the first rotating shaft, and described the first drive motors is arranged on the other end of the first rotating shaft.
Above-mentioned online low nitrogen oxygen enrichment compound combustion energy conserving system, it is characterized in that: described coal-roller delivery group is comprised of the dynamic screen type screw coal conveyer set gradually from top to bottom, the first coal-roller delivery and the second coal-roller delivery three parts, described the first coal-roller delivery and the second coal-roller delivery all are rotatably installed in the inside of coal bunker housing, and described dynamic screen type screw coal conveyer is fixedly mounted on the coal bunker housing, described dynamic screen type screw coal conveyer comprises the first shell be fixedly mounted on the coal bunker housing and is rotatably installed in the screw rod of the first enclosure, described screw rod is comprised of the first defeated coal screw rod and screening screw rod two parts of coaxial setting, spiral shell tooth on the described first defeated coal screw rod is and is interrupted setting, the tooth depth of described screening screw rod is less than the tooth depth of the first defeated coal screw rod, one end of the described first defeated coal screw rod is connected with the screening screw rod, the other end of the described first defeated coal screw rod passes the first shell and is connected with the second drive motors that is arranged on the first housing exterior, the described first defeated coal screw rod and screening screw rod all are rotatably installed on the first shell by bearing, the first outer casing bottom that is positioned at the described first defeated coal screw rod one end is connected with discharge nozzle, and described discharge nozzle and the second drive motors all are arranged on the outside of coal bunker housing, the first shell upper that is positioned at described screening screw rod one end has charging aperture, and the first outer casing bottom that is positioned at described screening screw rod one end evenly has a plurality of osculums.
Above-mentioned online low nitrogen oxygen enrichment compound combustion energy conserving system, it is characterized in that: on the inwall of described coal bunker housing and below being positioned at described coal-roller delivery group, be tiltedly installed with sealed liner, the inside of described coal bunker housing is provided with the second coal flashboard, described the second coal flashboard and the first coal flashboard are separately positioned on the both sides of liner baffle plate, described the second coal flashboard and the first coal flashboard are all by the second installation shaft, steel wire rope and connecting ring are arranged on the inside of coal bunker housing, described the second installation shaft is arranged on the coal bunker housing, one end of described steel wire rope is connected with the second installation shaft, the other end of described steel wire rope is connected with connecting ring.
Above-mentioned online low nitrogen oxygen enrichment compound combustion energy conserving system, it is characterized in that: described drying and forewarm heat exchanger comprises the first outer layer sleeve that is arranged on the dynamic screen type screw coal conveyer below, the first intermediate layer sleeve pipe, the first inner layer sleeve, the second defeated coal screw rod and the 3rd drive motors, described the first outer layer sleeve, the first intermediate layer sleeve pipe, the first inner layer sleeve and the second defeated coal screw rod ecto-entad set gradually, described the 3rd drive motors is arranged on the outside of the first inner layer sleeve and is connected with the second defeated coal screw rod, form air duct between described the first outer layer sleeve and the first intermediate layer sleeve pipe, form exhaust gases passes between described the first intermediate layer sleeve pipe and the first inner layer sleeve, the tube chamber of described the first inner layer sleeve is the smalls passage, the top of described the first inner layer sleeve is provided with the first smalls import of joining with discharge nozzle, and the bottom of described the first inner layer sleeve is provided with the first smalls outlet, the top of described the first intermediate layer sleeve pipe is provided with the gas approach joined with the boiler smoke circulating line, and the bottom of described the first intermediate layer sleeve pipe is provided with exhanst gas outlet, one end of described the first outer layer sleeve is provided with the first air intlet, and the other end of described the first outer layer sleeve is provided with the first air outlet slit.
Above-mentioned online low nitrogen oxygen enrichment compound combustion energy conserving system is characterized in that: described coal dust refining separation device comprises and is arranged on the first smalls outlet below and carries out the coal-grinding and powder-spraying machine of milled processed and join with coal-grinding and powder-spraying machine and for the coal dust after the coal-grinding and powder-spraying machine milled processed being delivered to low nitrogen four-way coal burner and the pressurization sorting that ashes is delivered to the chain coal burning boiler burner hearth bottom being carried to storehouse for the oven dry smalls that will fall through the first smalls outlet; Described coal-grinding and powder-spraying machine comprises that second housing, the second rotating shaft, fan mill impeller, screen cloth and 4 wheel driven move motor, one end of described second housing has the second smalls import, described the second smalls import is joined by smalls conveyance conduit and the outlet of the first smalls, and the other end bottom of described second housing has the second smalls outlet; Described the second rotating shaft is rotatably installed in the inside of second housing, and the moving motor of described 4 wheel driven is arranged on the outside of second housing and is connected with the second rotating shaft by belt; Described fan mill impeller and screen cloth all are arranged on the inside of second housing, the quantity of described fan mill impeller and screen cloth is a plurality of, described fan mill impeller and screen cloth are spaced, described fan mill impeller is fixedly mounted on the second rotating shaft, and described screen cloth is fixedly mounted on the inwall of second housing.
Above-mentioned online low nitrogen oxygen enrichment compound combustion energy conserving system is characterized in that: described pressurization sorting carries storehouse comprise gas-tight silo and be arranged on the ring pipe of gas-tight silo inside, and the aid distributing pipe and the high pressure positive blower that are arranged on the gas-tight silo outside; One end of described ring pipe joins by grey coal dust conveyance conduit and the outlet of the second smalls, the other end of described ring pipe is connected with power transportation pipe, have on described ring pipe the ash content in ring pipe is screened to the ash content screen holes of getting off, baffle plate is installed on described ring pipe and coal dust is delivered to second Venturi tube of hanging down nitrogen four-way coal burner, described baffle plate is arranged on the below of ash content screen holes; The bottom of described gas-tight silo has the ashes outlet, and described ashes exit is equipped with the first Venturi tube that ashes is blown into to the chain coal burning boiler burner hearth bottom; Described aid distributing pipe is comprised of main aid distributing pipe and the first aid distributing pipe be connected with main aid distributing pipe and the second aid distributing pipe three parts, described main aid distributing pipe and high pressure positive blower join, the first pressure air blowing pipe of described the first aid distributing pipe and described the first Venturi tube joins, and the second pressure air blowing pipe of described the second aid distributing pipe and described the second Venturi tube joins.
Above-mentioned online low nitrogen oxygen enrichment compound combustion energy conserving system, it is characterized in that: described high pressure positive blower also connects the heat pipe preheater that carries out preheating for the coal dust by ring pipe, described heat pipe preheater is comprised of preheating can and the economizer bank that is arranged on described preheating can inside, described preheating can is comprised of the air tank be connected and flue gas tank, the quantity of described economizer bank is many, one end of described economizer bank is positioned at the inside of air tank, and the other end of described economizer bank is positioned at the inside of flue gas tank; The upper end of described flue gas tank has the high-temperature waste flue gas import, and the lower end of described flue gas tank has the useless exhanst gas outlet 13 of the low temperature that passes into the chain coal burning boiler fire grate, and described high-temperature waste flue gas import is joined by high-temperature flue gas pipeline and boiler smoke circulating line; The upper end of described air tank has the second air intlet, and the lower end of described air tank has the second air outlet slit, and described the second air outlet slit and high pressure positive blower join.
The online refining separation device of above-mentioned coal dust, it is characterized in that: described low nitrogen four-way coal burner comprises the second outer layer sleeve, the second intermediate layer sleeve pipe, the second inner layer sleeve, coal powder supervisor and air distribution supervisor, described the second outer layer sleeve, the second intermediate layer sleeve pipe and the second inner layer sleeve ecto-entad set gradually, described the second outer layer sleeve is arranged on chain coal burning boiler by mounting flange, and described coal powder supervisor and air distribution supervisor all are arranged on the outside of chain coal burning boiler; Form a level air-distribution passage between the second outer layer sleeve and the second intermediate layer sleeve pipe, form two level air-distribution passages between described the second intermediate layer sleeve pipe and the second inner layer sleeve; On described the second outer layer sleeve, be equipped with and the one-level aid distributing pipe of a level air-distribution channel connection and the secondary aid distributing pipe communicated with two level air-distribution passages, described coal powder supervisor's an end and the second inner layer sleeve join, and described coal powder supervisor's the other end and power transportation pipe join; Described air distribution supervisor's shape is in the shape of the letter V, described air distribution supervisor's a end is arranged on the inside of the second inner layer sleeve, described air distribution supervisor's the other end joins by air duct and burner blower fan and the first air outlet slit, described burner assembling is on air duct, described air distribution supervisor's inside is equipped with revolves core, and the described core that revolves is arranged on the air distribution supervisor who is positioned at the second inner layer sleeve inside.
Above-mentioned online low nitrogen oxygen enrichment compound combustion energy conserving system, it is characterized in that: described exhanst gas outlet is connected with the low-temperature flue gas pipeline, and described exhanst gas outlet is by the low-temperature flue gas pipeline and be arranged on the low-temperature flue gas that the flue gas recirculation blower fan on the low-temperature flue gas pipeline will flow out through exhanst gas outlet and pass into the chain coal burning boiler fire grate.
The present invention compared with prior art has the following advantages:
1, simple in structure, reasonable in design and result of use is good.
2, energy conserving system of the present invention has solved the technical barrier that big-and-middle-sized traveling-grate stoker coal-burning boiler is difficult to carry out energy-efficient transformation, there are a plurality of online processing capacities: (1) online sorting raw coal: when adopting dynamic screen type screw coal conveyer to carry raw coal to the traveling-grate stoker coal boiler grate, sealing synchronously sub-elects the required smalls of compound combustion, eliminated additional labor, reduce processing cost, met environmental requirement; (2) online drying and forewarm: adopt useless flue gas as thermal source, synchronously the smalls sorted out is dried by the drying and forewarm heat exchanger, to guarantee powder process quality and fineness; For taking full advantage of of heat energy, designed again air duct, both improved system to the adaptability of fuel, the stability of burning, realized again the utilization of waste heat, increased economy, the social effect of this system to energy-saving and emission-reduction; (3) online powder process, conveying, burning: floor space is little, does not store, and security is good; (4) drop into online and exit: do not affect former steam generator system operation, system reliability is high, good stability; (5) in the line thinning sorting: the rough coal powder inferior of carrying is carried out to sorting, refinement, send again respectively super sea coal and high ash powder coal dust back to the burner hearth diverse location after processing, processing procedure does not cause any waste of fuel, has improved coal adaptability, burning combustion colm that can be good.
3, can realize low nitrogen oxygen enrichment compound combustion: (1) compound combustion: raw coal burns for the one-level burning on the traveling-grate stoker coal boiler grate, and coal dust is suspended in the burning of traveling-grate stoker coal-burning boiler burner hearth for secondary firing; (2) High Rotation Speed forms the segregated combustion of local low nitrogen oxygen enrichment and localized rich nitrogen: utilize molecular wt difference and High Rotation Speed mode to form the isolating environment of local oxygen enrichment, localized rich nitrogen, improve combustion efficiency; (3) reduced by 50% the blow rate required, formed oxygen debt combustion zone, i.e. fire grate low nitrogen burning on fire grate; The more former steam generator system of this technology has reduced by 50% smoke discharge amount, causes the soot emissions rate to reduce by 70% left and right (the oxynitride discharge rate reduces by 70% left and right), environment protecting highly significant; (4) smoke circulating system: boiler smoke is introduced into the drying and forewarm heat exchanger and completes heat exchange; enter again the local blower system of traveling-grate stoker coal boiler grate; reduce the air blast oxygen concentration, improve air blast blast (improving burning, protection fire grate), form the low oxygen combustion environment.
4, the raw material of composite combustion with powdered coal system is raw coal, the coal-grinding and powder-spraying machine of energy conserving system of the present invention has strict demand to the particle diameter of raw coal, the raw coal used due to the industrial user is mixed coal, and granular size differs, and moisture is higher, the conventional method of drying again of first pulverizing is invested large, increased processing cost, floor space is large, and optional equipment is a lot, additional labor is more, is not suitable with the requirement of new coal powder compound combustion system; The dynamic screen type screw coal conveyer that this compound combustion energy conserving system contains the function of dynamically sieving can be directly installed on the coal bunker housing, to raw coal, it goes without doing that any early stage processes in using to make the user, just can meet online the requirement of composite combustion with powdered coal system, greatly reduce operating cost and cost of investment, for the popularization of composite combustion with powdered coal energy conserving system is had laid a good foundation.
5, the coal dust refining separation device is arranged on the defeated powdery state operation of simulation pulverized-coal fired boiler on chain coal burning boiler, obtained very good combustion efficiency: medium-and-large-sized Industrial Boiler and station boiler, energy input ratio in China's active service coal-burning boiler accounts for more than 70%, the annual 1500000000 tons of left and right of raw coal that consume of estimation, and the composite combustion with powdered coal system that the coal dust refining separation device is installed shows through energy-conservation examining report, average coal saving rate is 10% or more, (notes: the large scale industry boiler design thermal efficiency is all higher, generally more than 85%, therefore it 10% has been very high index that coal saving rate can have).By this index, adjust, if promote the use of, annual coal conservation can reach 15,000 ten thousand tons, can be national energy-saving and emission-reduction and makes huge contribution, through runtime verification, it is safe and reliable, can amplify on the pulverized-coal fired boiler applied to more than 1000 tons, and refinement sorting load is adjustable continuously, stable, boiler output obviously increases, the equal decrease of unburned carbon in flue dust and boiler slag carbon content, and energy-saving effect is good.
6, the present invention can arrange one-touch control system, system start and stop program is required to be designed to one-touch control system, the logic of having demonstrate,proved each link of technique starts the time delay order and stops the time delay order, thereby guaranteed that raw coal transfer passage and pulverized coal grinding transfer passage can not occur stopping up because the residue accumulation is arranged, thereby the system failure of having avoided the manually-operated error to bring, simplify the operation, be easy to promote.
7, applied range, can be used on 1 ton, 2 tons, 4 tons, 6 tons, 10 tons, 20 tons, 35 tons, 75 tons, 110 tons, 150 tons all specification chain-grate type coal-burning boilers, the main combustion mode of the type fuel is grate firing, have incomplete combustion so more serious, the problem that efficiency of combustion is low, have the very large energy saving space, according to statistics, the type boiler year coal consumption is about 600,000,000 tons of left and right, adjusts 1.2 hundred million tons, Spring Festival holidays raw coal by average coal saving rate 20%.In addition, this energy conserving system also can be used for following two occasions through rationally transformation: (1) big-and-middle-sized coal dust coal-burning boiler: the main combustion mode of the type fuel is the chamber combustion, being about to raw coal is processed into coal dust and passes through burner combustion, have the advantages that efficiency of combustion is high, but, because raw coal quality (calorific value, containing grey rate) descends year by year, affected the performance of former boiler; According to statistics, 1,500,000,000 tons of left and right of the type year coal consumption, adjust by average coal saving rate 5%, and year is economized on coal 0.75 hundred million ton; (2) big-and-middle-sized circulating fluidized bed combustion coal boiler: the main combustion mode of the type fuel is also the chamber combustion, but different is, raw coal only is processed into relatively fine particle, by wind bed suspension combustion, this stove is owing to having designed circulation canal, can make the uncombusted fuel recycle return to hearth combustion, so this kind of suitable burning inferior coal of the type of furnace, but when the non-constant of ature of coal, when boiler is located again peak period and taken efforts, usually need afterburning (afterburning oil), both increased cost, increase again operation easier, and adopted online compound combustion system, can replace afterburning system fully.According to statistics, the type boiler year coal consumption is about 600,000,000 tons of left and right (by increasing) at present, by average energy saving 5%, adjusts, and is converted to approximately 0.6 hundred million tons, raw coal Spring Festival holidays raw coal.
8, economic and social benefits are high: (1) energy-conservation (economy) benefit guarantees a year coal conservation 20%; (2) environmental protection (society) benefit, can realize comprehensive reducing discharge capacity 50%, wherein, smoke discharge amount reduces by 60%, and dust concentration reduces by 20%, the soot emissions rate reduces by 60%, sulfur dioxide concentration reduces by 30%, and the sulfur dioxide (SO2) emissions rate reduces by 70%, and oxynitride concentration reduces by 30%, the oxynitride discharge rate reduces by 70%, and carbon emission reduces by 10%.
In sum, the invention solves and realize energy-conservation and contradiction that reduce costs, realized that national policy support and user use satisfied win-win situation, the situation that especially this system descends to the raw coal quality has good adaptability, for current former coal resource, reduces year by year, under the rare present situation of high-quality raw coal, can process online colm, with minimum cost, obtain best result of use, improve the service efficiency of colm, reduce energy waste, reduced enterprise's use cost.
Below by drawings and Examples, the present invention is described in further detail.
The accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
The structural representation that Fig. 2 is the comprehensive coal bunker of pretreatment of the present invention.
The structural representation that Fig. 3 is vibrating mechanism of the present invention.
The structural representation that Fig. 4 is dynamic screen type screw coal conveyer of the present invention.
The cross-sectional view that Fig. 5 is the defeated coal screw rod of the present invention first.
The syndeton schematic diagram that Fig. 6 is drying and forewarm heat exchanger of the present invention and boiler smoke circulating line.
The syndeton schematic diagram that Fig. 7 is coal dust refining separation device of the present invention and heat pipe preheater.
Fig. 8 is the structural representation after coal-grinding and powder-spraying machine of the present invention is removed the moving motor of 4 wheel driven.
Fig. 9 is that the structural representation after aid distributing pipe and high pressure positive blower are removed in storehouse is carried in the present invention's sorting of pressurizeing.
Figure 10 is the left view after Fig. 9 removes ring pipe.
The structural representation that Figure 11 is the low nitrogen four-way coal burner of the present invention.
Description of reference numerals:
1-1-coal bunker housing; 1-11-observation panel; 1-12-flashboard AD;
1-13-dividing plate; 1-14-second installation shaft; 1-15-steel wire rope;
1-16-connecting ring; 1-2-first coal flashboard;
1-3-dynamic screen type screw coal conveyer; The defeated coal screw rod of 1-31-first;
1-32-screening screw rod; 1-33-first shell; 1-34-charging aperture;
1-35-osculum; 1-36-discharge nozzle; 1-37-second drive motors;
1-38-bearing; 1-4-liner baffle plate; 1-51-installing plate;
1-52-one-level sieving plate; 1-53-secondary sieving plate; 1-54-coal groove;
1-61-first installation shaft; 1-62-first baffle plate; 1-63-second baffle;
1-64-cam; 1-65-first rotating shaft; 1-66-first drive motors;
1-67-slide block; 1-68-guide rail; 1-7-second coal flashboard;
1-8-first coal-roller delivery; 1-9-second coal-roller delivery; 1-10-sealed liner;
2-drying and forewarm heat exchanger; 2-1-first outer layer sleeve; 2-11-first air intlet;
2-12-first air outlet slit; 2-2-first intermediate layer sleeve pipe; 2-21-gas approach;
2-22-exhanst gas outlet; 2-3-first inner layer sleeve; The import of 2-31-first smalls;
The outlet of 2-32-first smalls; The defeated coal screw rod of 2-4-second; 2-5-the 3rd drive motors;
3-1-coal-grinding and powder-spraying machine; 3-11-second rotating shaft; 3-12-fan mill impeller;
3-13-screen cloth; 3-14-second housing;
The import of 3-141-second smalls; The outlet of 3-142-second smalls;
3-21-gas-tight silo; 3-211-ashes outlet; 3-22-ring pipe;
3-221-ash content screen holes; 3-222-baffle plate; 3-23-high pressure positive blower;
3-241-main aid distributing pipe; 3-242-first aid distributing pipe; 3-243-second aid distributing pipe;
2-25-first pressure air blowing pipe; 2-26-second pressure air blowing pipe;
3-311-air tank; 3-312-flue gas tank; 4-1-second outer layer sleeve;
4-11-mounting flange; 4-2-second intermediate layer sleeve pipe; 4-3-second inner layer sleeve;
4-4-coal powder supervisor; 4-5-air distribution supervisor; 4-51-revolve core;
3-32-economizer bank; 3-17-4 wheel driven moves motor;
4-low nitrogen four-way coal burner; 5-chain coal burning boiler;
6-chain coal burning boiler fire grate; 7-boiler smoke circulating line;
8-smalls conveyance conduit; 9-belt; 10-grey coal dust conveyance conduit;
11-power transportation pipe; The import of 12-high-temperature waste flue gas; 13-low temperature exhanst gas outlet that gives up;
14-high-temperature flue gas pipeline; The 15-the second air intlet; The 16-the second air outlet slit;
17-one level air-distribution passage; 17-1-one-level aid distributing pipe; 18-two level air-distribution passages;
18-1-secondary aid distributing pipe; 19-air duct; 20-low-temperature flue gas pipeline;
21-flue gas recirculation blower fan.22-burner blower fan.
The specific embodiment
As shown in Figure 1, the present invention includes to be arranged on chain coal burning boiler 5 and raw coal layered is sent into to chain coal burning boiler fire grate 6 the comprehensive coal bunker of pretreatment of online sorting smalls and the smalls that the comprehensive coal bunker of described pretreatment is sorted out in lines and dried, carry the also drying and forewarm heat exchanger 2 of preheated air, and with drying and forewarm heat exchanger 2, join and smalls that drying and forewarm heat exchanger 2 is dried carries out the coal dust refining separation device of refinement sorting and the super sea coal after described coal dust refining separation device refinement sorting sent into to the low nitrogen oxygen enriched powdered coal burner 4 of chain coal burning boiler burner hearth, described drying and forewarm heat exchanger 2 is arranged on the outside of the comprehensive coal bunker of described pretreatment, described coal dust refining separation device is arranged on the below of drying and forewarm heat exchanger 2, described low nitrogen four-way coal burner 4 is arranged on chain coal burning boiler 5, and described low nitrogen four-way coal burner 4 all joins with drying and forewarm heat exchanger 2 and described coal dust refining separation device.
As shown in Figures 2 and 3, in the present embodiment, the comprehensive coal bunker of described pretreatment comprises coal bunker housing 1-1 and is arranged on the coal-roller delivery group on coal bunker housing 1-1, and is arranged on coal bunker housing 1-1 inside and sieves for the first coal flashboard 1-2 that adjusts lower coal amount and the dynamic combined that is arranged on the first coal flashboard 1-2 below and raw coal layered is sent on chain coal burning boiler fire grate 6 in lines; The bottom of described coal bunker housing 1-1 is provided with observation panel 1-11, and the inside of described coal bunker housing 1-1 is equipped with dividing plate 1-13 and liner baffle plate 1-4, between described dividing plate 1-13 and coal bunker housing 1-1, is provided with flashboard AD 1-12; Described dynamic combined sieve comprises installing plate 1-51, one-level sieving plate 1-52, secondary sieving plate 1-53 and coal groove 1-54, and for driving the vibrating mechanism of installing plate 1-51, one-level sieving plate 1-52, secondary sieving plate 1-53 and coal groove 1-54 vibration, described installing plate 1-51, one-level sieving plate 1-52, secondary sieving plate 1-53 and coal groove 1-54 all are arranged on the inside of coal bunker housing 1-1, described one-level sieving plate 1-52, secondary sieving plate 1-53 and coal groove 1-54 from top to bottom set gradually, and described secondary sieving plate 1-53 and coal groove 1-54 are installed on installing plate 1-51; Described vibrating mechanism comprises through the first installation shaft 1-61 of coal bunker housing 1-1 and the first baffle plate 1-62, the second baffle 1-63, cam 1-64, the first rotating shaft 1-65 and the first drive motors 1-66 that are arranged on coal bunker housing 1-1 outside, described the first baffle plate 1-62, second baffle 1-63 and one-level sieving plate 1-52 are installed on the first installation shaft 1-61, described the first installation shaft 1-61 is upper and be fixed with slide block 1-67 near liner baffle plate 1-4 position, and described slide block 1-67 and the guide rail 1-68 be fixed on liner baffle plate 1-4 are used in conjunction with; Described cam 1-64 is arranged between the first baffle plate 1-62 and second baffle 1-63 and is arranged on the end of the first rotating shaft 1-65, and described the first drive motors 1-66 is arranged on the other end of the first rotating shaft 1-65.The conventional layering sieving plate of coal bunker is in lines fixed, and can only adjust angle of inclination, belongs to static sieving plate, therefore in the situation of raw coal humidity, easily loses efficacy; And in the present embodiment, drive installing plate 1-51, one-level sieving plate 1-52, secondary sieving plate 1-53 and coal groove 1-54 vibration by vibrating mechanism, the vibrosieve of realization to raw coal, so not only have good adaptability to the raw coal state variation, and improved screening efficiency.
As shown in Fig. 2, Fig. 4 and Fig. 5, in the present embodiment, described coal-roller delivery group is comprised of the dynamic screen type screw coal conveyer 1-3 set gradually from top to bottom, the first coal-roller delivery 1-8 and the second coal-roller delivery 1-9 tri-parts, described the first coal-roller delivery 1-8 and the second coal-roller delivery 1-9 all are rotatably installed in the inside of coal bunker housing 1-1, and described dynamic screen type screw coal conveyer 1-3 is fixedly mounted on coal bunker housing 1-1, described dynamic screen type screw coal conveyer 1-3 comprises the first shell 1-33 be fixedly mounted on coal bunker housing 1-1 and is rotatably installed in the screw rod of the first shell 1-33 inside, described screw rod is comprised of the first defeated coal screw rod 1-31 and screening screw rod 1-32 two parts of coaxial setting, spiral shell tooth on the described first defeated coal screw rod 1-31 is and is interrupted setting, the tooth depth of described screening screw rod 1-32 is less than the tooth depth of the first defeated coal screw rod 1-31, the end of the described first defeated coal screw rod 1-31 is connected with screening screw rod 1-32, the other end of the described first defeated coal screw rod 1-31 passes the first shell 1-33 and is connected with the second drive motors 1-37 that is arranged on the first shell 1-33 outside, the described first defeated coal screw rod 1-31 and screening screw rod 1-32 all are rotatably installed on the first shell 1-33 by bearing 1-38, the the first shell 1-33 bottom that is positioned at the described first defeated coal screw rod 1-31 mono-end is connected with discharge nozzle 1-36, and described discharge nozzle 1-36 and the second drive motors 1-37 all are arranged on the outside of coal bunker housing 1-1, the the first shell 1-33 top that is positioned at described screening screw rod 1-32 mono-end has charging aperture 1-34, and the first shell 1-33 bottom even that is positioned at described screening screw rod 1-32 mono-end has a plurality of osculum 1-35.Wherein, the spiral shell tooth height of screening screw rod 1-32 is to require to determine according to the pan feeding particle diameter of coal-grinding and powder-spraying machine 3-1, screening screw rod 1-32 is by the matched in clearance with the first shell 1-33, when screening screw rod 1-32 rotation, the following raw coal of particle diameter that only allows to meet the requirements passes through, and is greater than that the raw coal that requires particle diameter is screened to be got off to stay in coal bunker housing 1-1, and then has realized the dynamic screening of raw coal, the screening screw rod 1-32 of design different-diameter, can meet the output requirement of different size coal-grinding and powder-spraying machine.When preventing that moisture in raw coal is excessive (this phenomenon overcast and rainy and winter in spring and autumn is more serious), reduce moisture and enter coal-grinding and powder-spraying machine, have a plurality of osculum 1-35 at the first shell 1-33 bottom even, utilize the pinching characteristic of screw rod transmission, most of moisture in duff particle after screening is flow back to coal bunker housing 1-1 by osculum 1-35, thereby greatly reduced the pan feeding moisture of coal-grinding and powder-spraying machine, improved milling quality.The first defeated coal screw rod 1-31 only is responsible for the duff particle screened is sent into to coal-grinding and powder-spraying machine, but in order to prevent that in the duff particle, residual moisture content can press from both sides the dead first defeated coal screw rod 1-31, the spy is designed to discontinuous spiral shell leaf by the first defeated coal screw rod 1-31, guarantees the stable conveying of damp coal; Can between the first defeated coal screw rod 1-31 and the second drive motors 1-37, configure variable-frequency governor, realize the automatic control of smalls load by the adjustment to the second drive motors 1-37 rotating speed.In addition, due to the screening effect, variation (smalls minimizing) has occurred in the raw coal granularity that enters chain coal burning boiler fire grate 6, thereby has comprehensively improved the sponginess that falls into coal bunker housing 1-1 coal seam, and air permeability is good, has guaranteed the good combustion of raw coal.
As shown in Figure 2, in the present embodiment, be tiltedly installed with sealed liner 1-10 on the inwall of described coal bunker housing 1-1 and below being positioned at described coal-roller delivery group, the inside of described coal bunker housing 1-1 is provided with the second coal flashboard 1-7, described the second coal flashboard 1-7 and the first coal flashboard 1-2 are separately positioned on the both sides of liner baffle plate 1-4, described the second coal flashboard 1-7 and the first coal flashboard 1-2 are all by the second installation shaft 1-14, steel wire rope 1-15 and connecting ring 1-16 are arranged on the inside of coal bunker housing 1-1, described the second installation shaft 1-14 is arranged on coal bunker housing 1-1, the end of described steel wire rope 1-15 is connected with the second installation shaft 1-14, the other end of described steel wire rope 1-15 is connected with connecting ring 1-16.Wherein, sealed liner 1-10 can accept between dynamic screen type screw coal conveyer 1-3 and the first coal-roller delivery 1-8 and the coal leaked down between the first coal-roller delivery 1-8 and the second coal-roller delivery 1-9, be long-pending coal on sealed liner 1-10 between dynamic screen type screw coal conveyer 1-3 and the first coal-roller delivery 1-8 and between the first coal-roller delivery 1-8 and the second coal-roller delivery 1-9, realizing soft seal, thereby solved dexterously between dynamic screen type screw coal conveyer 1-3 and the first coal-roller delivery 1-8 and problem that between the first coal-roller delivery 1-8 and the second coal-roller delivery 1-9, gap shorting leaks coal and card coal.Conventional layering coal bunker in lines only has a lump coal flashboard, the gap in chimney arch and coal seam is larger, during malleation, easily burn out the coal bunker internal structure, therefore do not resist the function of malleation in stove, affected boiler output, and in the present embodiment, the second coal flashboard 1-7 adjusting chain formula coal-burning boiler burner hearth face arch of adopting refractory material casting to form and gap between coal seam have been increased, thereby while guaranteeing boiler operatiopn, less thermal loss and protection coal bunker, the coal bunker minimum of leaking out, and when critical pressurized operation, (boiler EIAJ state) can seal flame in burner hearth, protection coal bunker internal structure can not damaged, and the coal seam thickness adjusting is what to complete by the lifting of adjusting the first coal flashboard 1-2.
As shown in Figure 6, in the present embodiment, described drying and forewarm heat exchanger 2 comprises the first outer layer sleeve 2-1 that is arranged on dynamic screen type screw coal conveyer 1-3 below, the first intermediate layer sleeve pipe 2-2, the first inner layer sleeve 2-3, the second defeated coal screw rod 2-4 and the 3rd drive motors 2-5, described the first outer layer sleeve 2-1, the first intermediate layer sleeve pipe 2-2, the first inner layer sleeve 2-3 and the second defeated coal screw rod 2-4 ecto-entad set gradually, described the 3rd drive motors 2-5 is arranged on the outside of the first inner layer sleeve 2-3 and is connected with the second defeated coal screw rod 2-4, form air duct between described the first outer layer sleeve 2-1 and the first intermediate layer sleeve pipe 2-2, form exhaust gases passes between described the first intermediate layer sleeve pipe 2-2 and the first inner layer sleeve 2-3, the tube chamber of described the first inner layer sleeve 2-3 is the smalls passage, the top of described the first inner layer sleeve 2-3 is provided with the first smalls import 2-31 joined with discharge nozzle 1-36, and the bottom of described the first inner layer sleeve 2-3 is provided with the first smalls outlet 2-32, the top of described the first intermediate layer sleeve pipe 2-2 is provided with the gas approach 2-21 joined with boiler smoke circulating line 7, and the bottom of described the first intermediate layer sleeve pipe 2-2 is provided with exhanst gas outlet 2-22, the end of described the first outer layer sleeve 2-1 is provided with the first air intlet 2-11, and the other end of described the first outer layer sleeve 2-1 is provided with the first air outlet slit 2-12.Drying and forewarm heat exchanger 2 is in fact a heat exchanger, and its thermal source is taken from the useless flue gas (function that has surplus heat and utilize) of boiler; When useless flue gas passes through exhaust gases passes, the heat absorption that the first intermediate layer sleeve pipe 2-2 and the first inner layer sleeve 2-3 will give up in flue gas is simultaneously got off, the heat that wherein the first inner layer sleeve 2-3 absorbs is changed to the smalls in dynamic transport, because smalls is to adopt the mode of spiral rolling to carry (being similar to frying pan), so drying efficiency is very high; The heat that the first intermediate layer sleeve pipe 2-2 absorbs is changed to mobile air, to guarantee the air distribution temperature of low nitrogen four-way coal burner 4.Drying and forewarm heat exchanger 2 has obvious characteristics of energy saving, the air of not only having dried smalls but also preheating, and do not increase cost, effectively utilized waste heat, coal adaptability and the seasonal adaptation of online compound combustion system have greatly been improved simultaneously, possessed the round-the-clock running ability, from exhanst gas outlet 2-22, low-temperature flue gas out directly is transmitted back to chain coal burning boiler fire grate 6, is that the low nitrogen burning of chain coal burning boiler fire grate 6 is created burning situation.
As shown in Figure 7 and Figure 8, in the present embodiment, described coal dust refining separation device comprises and is arranged on the first smalls outlet 2-32 below and carries out the coal-grinding and powder-spraying machine 3-1 of milled processed and join with coal-grinding and powder-spraying machine 3-1 and for the coal dust after coal-grinding and powder-spraying machine 3-1 milled processed being delivered to low nitrogen four-way coal burner 4 and the pressurization sorting that ashes is delivered to the chain coal burning boiler burner hearth bottom being carried to storehouse for the oven dry smalls that will fall through the first smalls outlet 2-32; Described coal-grinding and powder-spraying machine 3-1 comprises that second housing 3-14, the second rotating shaft 3-11, fan mill impeller 3-12, screen cloth 3-13 and 4 wheel driven move motor 3-17, the end of described second housing 3-14 has the second smalls import 3-141, described the second smalls import 3-141 joins by smalls conveyance conduit 8 and the first smalls outlet 2-32, and the other end bottom of described second housing 3-14 has the second smalls outlet 3-142; Described the second rotating shaft 3-11 is rotatably installed in the inside of second housing 3-14, and the moving motor 3-17 of described 4 wheel driven is arranged on the outside of second housing 3-14 and is connected with the second rotating shaft 3-11 by belt 9; Described fan mill impeller 3-12 and screen cloth 3-13 all are arranged on the inside of second housing 3-14, the quantity of described fan mill impeller 3-12 and screen cloth 3-13 is a plurality of, described fan mill impeller 3-12 and screen cloth 3-13 are spaced, it is upper that described fan mill impeller 3-12 is fixedly mounted on the second rotating shaft 3-11, and described screen cloth 3-13 is fixedly mounted on the inwall of second housing 3-14.The coal dust refining separation device is the important step in online composite combustion with powdered coal system, the solution that it is good the online technical barrier with use with mill, met energy-conservation and dual requirements that reduce costs, realized national support and customer satisfaction system win-win situation.The raw material of compound combustion system is raw coal, and the coal-grinding and powder-spraying machine 3-1 of this system is processed into coal dust by raw coal.The raw coal moisture that the industrial user uses is higher, the ash powder content is larger, calorific value is generally lower, because the storage of high-quality raw coal reduces year by year, adding raw coal, to peddle the supply system phenomenon of playing tricks serious, user's fuel quality is difficult to be guaranteed, and therefore still according to conventional coal dust combustion method, has been difficult to meet the condition of coal dust good combustion in coal-burning boiler.According to practice for many years and research experience summary, draw: " quality of Pulverized Coal, fineness are to guarantee fuel ignition and clean-burning essential condition ", conventional coal dust processing method can not guarantee the equal uniformity of coal dust, especially when boiler operatiopn when higher load condition needs pulverized coal flow large, this kind of phenomenon worsens more, cause the larger coal dust of load thicker, the coal dust overstriking makes the boiler combustion effect greatly descend, vicious circle, the fuel burn-off rate is low, unburned carbon in flue dust and boiler slag carbon content are all higher, make energy consumption index increase.This kind of state has been not suitable with national energy-saving and reduced discharging, the energy consumption limit, the requirement that production cost reduces, and coal dust refining separation device (can be directly installed on chain coal burning boiler furnace side or chain coal burning boiler stove room bottom) not only can get off coal dust excessively thick in smalls and ashes sorting online, and coal dust inferior is converted into to super sea coal sends back to hearth combustion, ashes is sent into to the chain coal burning boiler burner hearth bottom, make the user in the situation that do not increase any operating cost, just can meet online the good clean-burning requirement of composite combustion with powdered coal system, greatly reduce boiler operatiopn cost and fuel cost of investment, boiler output and Technological adaptability have been improved, for the all-round popularization of composite combustion with powdered coal energy conserving system is had laid a good foundation, can apply it on chain formula coal-burning boiler and do fine coal compound combustion energy saving technical reconstruction, the particularly important is can be applied on big power station's coal dust power boiler and do coal powder second refinement sorting compound combustion energy saving technical reconstruction, application market is huge, energy-saving effect is remarkable, prospect is very good, can make huge contribution for national energy-saving and emission-reduction.Wherein, coal-grinding and powder-spraying machine 3-1 can be ground to the smalls refinement gas powder stream of granularity 100 microns left and right, and the more conventional coal-grinding and powder-spraying machine effect of refinement grinding is remarkable.
As shown in Figure 9 and Figure 10, in the present embodiment, described pressurization sorting carries storehouse comprise gas-tight silo 3-21 and be arranged on the ring pipe 3-22 of gas-tight silo 3-21 inside, and the aid distributing pipe and the high pressure positive blower 3-23 that are arranged on gas-tight silo 3-21 outside; The end of described ring pipe 3-22 joins by grey coal dust conveyance conduit 10 and the second smalls outlet 3-142, the other end of described ring pipe 3-22 is connected with power transportation pipe 11, have on described ring pipe 3-22 the ash content in ring pipe 3-22 is screened to the ash content screen holes 3-221 that gets off, baffle plate 3-222 is installed on described ring pipe 3-22 and coal dust is delivered to second Venturi tube of hanging down nitrogen four-way coal burner 4, described baffle plate 3-222 is arranged on the below of ash content screen holes 3-221; The bottom of described gas-tight silo 3-21 has ashes outlet 3-211, and described ashes outlet 3-211 place is equipped with the first Venturi tube that ashes is blown into to the chain coal burning boiler burner hearth bottom; Described aid distributing pipe is comprised of main aid distributing pipe 3-241 and the first aid distributing pipe 3-242 be connected with main aid distributing pipe 3-241 and the second aid distributing pipe 3-243 tri-parts, described main aid distributing pipe 3-241 and high pressure positive blower 3-23 join, the first pressure air blowing pipe 2-25 of described the first aid distributing pipe 3-242 and described the first Venturi tube joins, and the second pressure air blowing pipe 2-26 of described the second aid distributing pipe 3-243 and described the second Venturi tube joins.The pressurization sorting carries storehouse to adopt the principle of joining endless tube classification pressurized delivered in the gas-tight silo, makes the super sea coal after the refinement sorting, can overcome potential difference and be transmitted back to the coal powders supervisor 4-4 position that tens of rice is high; Simultaneously, utilize endless tube bottom segmented micropore to realize the gravity separation principle, by proportion, larger most of ashes is isolated endless tube and is dropped in gas-tight silo and be transported to online burner hearth bottom, has not only guaranteed can not pile up but also can realize twice laid by ashes, novel in design scientific and reasonable.
As 1 and Fig. 7 as shown in, in the present embodiment, described high pressure positive blower 3-23 also connects the heat pipe preheater that carries out preheating for the coal dust by ring pipe 3-22, described heat pipe preheater is comprised of with the economizer bank 3-32 that is arranged on described preheating can inside preheating can, described preheating can is comprised of the air tank 3-311 be connected and flue gas tank 3-312, the quantity of described economizer bank 3-32 is many, the end of described economizer bank 3-32 is positioned at the inside of air tank 3-311, and the other end of described economizer bank 3-32 is positioned at the inside of flue gas tank 3-312; The upper end of described flue gas tank 3-312 has high-temperature waste flue gas import 12, the lower end of described flue gas tank 3-312 has the useless exhanst gas outlet 13 of the low temperature that passes into chain coal burning boiler fire grate 6, and described high-temperature waste flue gas import 12 is joined by high-temperature flue gas pipeline 14 and boiler smoke circulating line 7; The upper end of described air tank 3-311 has the second air intlet 15, and the lower end of described air tank 3-311 has the second air outlet slit 16, and described the second air outlet slit 16 joins with high pressure positive blower 3-23.The setting of heat pipe preheater is to carry the air themperature in storehouse consistent with grey coal dust conveyance conduit 10 temperature for the sorting that keeps pressurizeing, thereby guarantee that coal dust is in the line thinning assorting room, do not change the overall air themperature of original system, can not cause the control system parameter of former boiler to change, reach safe and reliable, the purpose of handled easily.
As shown in figure 11, in the present embodiment, described low nitrogen four-way coal burner 4 comprises the second outer layer sleeve 4-1, the second intermediate layer sleeve pipe 4-2, the second inner layer sleeve 4-3, coal powder supervisor 4-4 and air distribution supervisor 4-5, described the second outer layer sleeve 4-1, the second intermediate layer sleeve pipe 4-2 and the second inner layer sleeve 4-3 ecto-entad set gradually, described the second outer layer sleeve 4-1 is arranged on chain coal burning boiler 5 by mounting flange 4-11, and described coal powder supervisor 4-4 and air distribution supervisor 4-5 all are arranged on the outside of chain coal burning boiler 5; Form a level air-distribution passage 17 between the second outer layer sleeve 4-1 and the second intermediate layer sleeve pipe 4-2, form two level air-distribution passages 18 between described the second intermediate layer sleeve pipe 4-2 and the second inner layer sleeve 4-3; The one-level aid distributing pipe 17-1 be communicated with a level air-distribution passage 17 and the secondary aid distributing pipe 18-1 communicated with two level air-distribution passages 18 are installed on described the second outer layer sleeve 4-1, an end and the second inner layer sleeve 4-3 of described coal powder supervisor 4-4 join, and the other end and the power transportation pipe 11 of described coal powder supervisor 4-4 join; The shape of described air distribution supervisor 4-5 is in the shape of the letter V, the end of described air distribution supervisor 4-5 is arranged on the inside of the second inner layer sleeve 4-3, the other end of described air distribution supervisor 4-5 joins by air duct 19 and burner blower fan 22 and the first air outlet slit 2-12, described burner blower fan 22 is arranged on air duct 19, the inside of described air distribution supervisor 4-5 is equipped with revolves core 4-51, and the described core 4-51 that revolves is arranged on the air distribution supervisor 4-5 that is positioned at the second inner layer sleeve 4-3 inside.Low nitrogen four-way coal burner 4 is piths of this energy-conservation system, all previous works are all in order to obtain good combustion efficiency at this, low nitrogen four-way coal burner 4 is to adopt air classification to join the oxygen burning, the basic principle that air classification is joined the oxygen burning is that the air of burning use is sent into stage by stage, at first a certain proportion of air (its flow is less than the theoretical air flow) is sent into to low nitrogen four-way coal burner 4, fuel is first burnt under anoxia condition, fuel combustion speed and theoretical temperature combustion reduce, burning generates CO, in fuel, nitrogen resolves into a large amount of HN, HCN, CN, NH 3and NH 2deng, their mutual composition generation nitrogen or by the NO existed xreduction decomposition, thus fuel type NO suppressed xgeneration, and then join oxygen, the burning CO of take is main target.So, both reach very high fuel utilization efficiency, realized again low-nitrogen discharged environmental requirement.Also have conventional whirlwind producing method (cyclone plate, whirlwind sheet etc.) can't produce the strong whirlwind of high pressure, can not meet the technological requirement of burner design, this enforcement is by revolving core 4-51 inner installation of air distribution supervisor 4-5, can make the wind coal dust produce the High Rotation Speed of 20 meter per seconds, its effect is: 1, realize that coal powder light-dark separates, both guaranteed low-oxygen environment, removed smoke again on the impact of burning; 2, form enough central negative pressure tempering, with guarantee pulverized coal flow continue light and smooth combustion; 3, form local oxygen-enriched environment (the rotating centrifugal principle: the proportion of oxygen is greater than nitrogen, and the oxygen concentration that rotates edge is greater than airborne natural concentration), guaranteed smooth combustion.In addition, a level air-distribution passage 17 also can aspirate the flue gas of chain coal burning boiler burner hearth, and the effect of two aspects is arranged like this: but on the one hand can preheat burner, and secondary improves the initial temperature that wind coal dust and air enter stokehold; The flue gas of suction can enter online pre-heating drying heat exchanger on the other hand, dries raw coal and preheated air, and overall process does not form the waste of flue gas heat.
As shown in Figure 1, in the present embodiment, described exhanst gas outlet 2-22 is connected with low-temperature flue gas pipeline 20, the low-temperature flue gas that will flow out through exhanst gas outlet 2-22 by low-temperature flue gas pipeline 20 and flue gas recirculation blower fan 21 passes into chain coal burning boiler fire grate 6, and described flue gas recirculation blower fan 21 is arranged on low-temperature flue gas pipeline 20.The low nitrogen burning technology, in China's developing history of existing two more than ten years, at present, has formed suitable popularity, NO in power plant's power pulverized-coal fired boiler xthe generation of (oxynitrides), main relevant with two factors: temperature and oxygen amount.Due to raw coal, when grate firing combustion system (chain coal burning boiler fire grate), actual peroxide amount large (crossing oxygen quotient>=1.2), so organized not at that time the large percentage of superfluous oxygen amount and nitrogen generation chemical reaction generation oxynitrides, NO when meeting burning xthree kinds of formation mechanisms are arranged: the first is the heating power type, is to be reacted generation with oxygen by nitrogen under higher temperature, and this reaction is generally being carried out more than 1500 ℃, its growing amount and temperature, relevant in the dividing potential drop of the high-temperature region time of staying and oxygen, the NO generated under this kind of situation xcan only adopt the method that removes after burning to process, the removing process complexity, invest greatlyr, and efficiency is not high.Thermal NO xbe NO and the NO that oxygen in the combustion process Air and nitrogen generate in high temperature 2summation, its reactional equation is: N 2+ O 2=2NO, NO+1/2O 2=NO 2, due to oxygen atom and N 2react the activation energy that needed activation energy reacts with combustible component in flame than oxygen atom much higher, and oxygen atom life period in flame is shorter, therefore can not produce a large amount of NO in flame, the reaction of formation of NO is that in fuel, carry out the high-temperature region after the combustible constituent burning-out.The activation energy generated due to thermal NO is very high, almost do not observing the reaction of formation of NO below 1500 ℃, when temperature surpasses 1500 ℃, 100 ℃ of the every risings of temperature, reaction speed will increase by 6～7 times, concerning pulverized-coal fired boiler, when ignition temperature during at 1350 ℃, the NOx generated in stove 100% is almost fuel type, when ignition temperature is 1600 ℃, and thermal NO xcan account for and generate 25%～30% of total amount, the traveling-grate stoker coal-burning boiler does not generally reach so high temperature, so heating power NOx can ignore.The second is fuel type, and the organic NOX nitrogen oxide referred in coal generates, and its growing amount and temperature relation are little, generates temperature lower than the heating power type, but in close relations with oxygen concentration, the mixed process of coal dust and air also has remarkable impact to it; Nitrogen-atoms in coal and various hydrocarbon are combined into ring-type or the chain compound of nitrogen, as C 5h 5n, C 6h 5nH 2deng.The C-N of nitrogen content of coal organic compound is less in conjunction with bond energy, when burning, easily decomposes.The angle generated from nitrogen oxide, oxygen more easily at first destroys C-N and nitrogen-atoms generates NO, fuel type NO during coal combustion xaccount for NO x75%～80% of total growing amount.The third is the wink hair style, is that in fuel, alkyl compound reacts the generation cyanide in oxygen debt flame with oxygen in gas, and wherein a part is converted into NO, and its conversion ratio is relevant with chemical equivalent and temperature.Therefore, the low nitrogen burning technology adopted in compound combustion, mainly for the NO that reduces fuel type xgrowing amount, the present embodiment adopts the low-temperature flue gas that gas is exported to the 2-22 outflow by low-temperature flue gas pipeline 20 and flue gas recirculation blower fan 21 to pass into chain coal burning boiler fire grate 6, make the oxygen quotient excessively of a wind be less than<1, thereby weakened fuel type NO xbuild environment, make native system possess environment-friendly advantage.
Operation principle of the present invention is: raw coal falls from coal bunker housing 1-1 top, the raw coal that the raw coal fallen will meet the requirements below particle diameter through screening screw rod 1-32 passes through, be greater than that the raw coal that requires particle diameter is screened gets off to be delivered to the first coal-roller delivery 1-8, be delivered to the second coal-roller delivery 1-9 by the first coal-roller delivery 1-8 again, then drop on the dynamic combined sieve upper, through the effect of dynamic combined sieve, raw coal layered is sent in lines on chain coal burning boiler fire grate 6 and burnt, the following raw coal of the particle diameter that meets the requirements is delivered to the first defeated coal screw rod 1-31 after screening screw rod 1-32 screening, under the effect of the first defeated coal screw rod 1-31, the smalls of screening is sent into to drying and forewarm heat exchanger 2, enter coal-grinding and powder-spraying machine 3-1 after the drying functions of smalls drying preheating heat exchanger 2, send into the pressurization sorting after being ground by coal-grinding and powder-spraying machine 3-1 refinement and carry storehouse, by the pressurization sorting, carry storehouse that coal dust is delivered to low nitrogen four-way coal burner 4, the most also by low nitrogen four-way coal burner 4, the pulverized coal injection of conveying being delivered to the chain coal burning boiler burner hearth is burnt, ashes is blown into to the chain coal burning boiler fire grate.
The above; it is only preferred embodiment of the present invention; not the present invention is imposed any restrictions, every any simple modification, change and equivalent structure transformation of above embodiment being done according to the technology of the present invention essence, all still belong in the protection domain of technical solution of the present invention.

Claims (10)

1. an online low nitrogen oxygen enrichment compound combustion energy conserving system, it is characterized in that: comprise being arranged on chain coal burning boiler (5) above and raw coal layered being sent into to chain coal burning boiler fire grate (6) the comprehensive coal bunker of pretreatment of online sorting smalls and the smalls that the comprehensive coal bunker of described pretreatment is sorted out in lines and dried, carry the also drying and forewarm heat exchanger (2) of preheated air, and join with drying and forewarm heat exchanger (2) and the smalls that drying and forewarm heat exchanger (2) is dried carried out to the coal dust refining separation device of refinement sorting and the super sea coal after described coal dust refining separation device refinement sorting is sent into to the low nitrogen oxygen enriched powdered coal burner (4) of chain coal burning boiler burner hearth, described drying and forewarm heat exchanger (2) is arranged on the outside of the comprehensive coal bunker of described pretreatment, described coal dust refining separation device is arranged on the below of drying and forewarm heat exchanger (2), it is upper that described low nitrogen oxygen enriched powdered coal burner (4) is arranged on chain coal burning boiler (5), and described low nitrogen oxygen enriched powdered coal burner (4) all joins with drying and forewarm heat exchanger (2) and described coal dust refining separation device.
2. according to online low nitrogen oxygen enrichment compound combustion energy conserving system claimed in claim 1, it is characterized in that: the comprehensive coal bunker of described pretreatment comprises coal bunker housing (1-1) and is arranged on the coal-roller delivery group on coal bunker housing (1-1), and it is inner and for the first coal flashboard (1-2) of adjusting lower coal amount be arranged on the first coal flashboard (1-2) below and dynamic combined that raw coal layered is sent on chain coal burning boiler fire grate (6) is in lines sieved to be arranged on coal bunker housing (1-1), the bottom of described coal bunker housing (1-1) is provided with observation panel (1-11), the inside of described coal bunker housing (1-1) is equipped with dividing plate (1-13) and liner baffle plate (1-4), between described dividing plate (1-13) and coal bunker housing (1-1), is provided with flashboard AD (1-12), described dynamic combined sieve comprises installing plate (1-51), one-level sieving plate (1-52), secondary sieving plate (1-53) and coal groove (1-54), and for driving installing plate (1-51), one-level sieving plate (1-52), the vibrating mechanism of secondary sieving plate (1-53) and coal groove (1-54) vibration, described installing plate (1-51), one-level sieving plate (1-52), secondary sieving plate (1-53) and coal groove (1-54) all are arranged on the inside of coal bunker housing (1-1), described one-level sieving plate (1-52), secondary sieving plate (1-53) and coal groove (1-54) from top to bottom set gradually, described secondary sieving plate (1-53) and coal groove (1-54) are installed on installing plate (1-51), described vibrating mechanism comprises through first installation shaft (1-61) of coal bunker housing (1-1) and is arranged on outside the first baffle plate (1-62) of coal bunker housing (1-1), second baffle (1-63), cam (1-64), the first rotating shaft (1-65) and the first drive motors (1-66), described the first baffle plate (1-62), second baffle (1-63) and one-level sieving plate (1-52) are installed on the first installation shaft (1-61), described the first installation shaft (1-61) is upper and be fixed with slide block (1-67) near liner baffle plate (1-4) position, described slide block (1-67) is used in conjunction with the guide rail (1-68) be fixed on liner baffle plate (1-4), described cam (1-64) is arranged between the first baffle plate (1-62) and second baffle (1-63) and is arranged on an end of the first rotating shaft (1-65), and described the first drive motors (1-66) is arranged on the other end of the first rotating shaft (1-65).
3. according to online low nitrogen oxygen enrichment compound combustion energy conserving system claimed in claim 2, it is characterized in that: described coal-roller delivery group is comprised of the dynamic screen type screw coal conveyer set gradually from top to bottom (1-3), the first coal-roller delivery (1-8) and the second coal-roller delivery (1-9) three parts, described the first coal-roller delivery (1-8) and the second coal-roller delivery (1-9) all are rotatably installed in the inside of coal bunker housing (1-1), and described dynamic screen type screw coal conveyer (1-3) is fixedly mounted on coal bunker housing (1-1), described dynamic screen type screw coal conveyer (1-3) comprises the first shell (1-33) be fixedly mounted on coal bunker housing (1-1) and is rotatably installed in the inner screw rod of the first shell (1-33), described screw rod is comprised of the first defeated coal screw rod (1-31) and screening screw rod (1-32) two parts of coaxial setting, spiral shell tooth on the described first defeated coal screw rod (1-31) is and is interrupted setting, the tooth depth of described screening screw rod (1-32) is less than the tooth depth of the first defeated coal screw rod (1-31), one end of the described first defeated coal screw rod (1-31) is connected with screening screw rod (1-32), the other end of the described first defeated coal screw rod (1-31) is connected through the first shell (1-33) and the second drive motors (1-37) outside with being arranged on the first shell (1-33), the described first defeated coal screw rod (1-31) and screening screw rod (1-32) all are rotatably installed on the first shell (1-33) by bearing (1-38), the first shell (1-33) bottom that is positioned at described first defeated coal screw rod (1-31) end is connected with discharge nozzle (1-36), and described discharge nozzle (1-36) and the second drive motors (1-37) all are arranged on the outside of coal bunker housing (1-1), the first shell (1-33) top that is positioned at described screening screw rod (1-32) end has charging aperture (1-34), and the first shell (1-33) bottom even that is positioned at described screening screw rod (1-32) end has a plurality of osculums (1-35).
4. according to online low nitrogen oxygen enrichment compound combustion energy conserving system claimed in claim 3, it is characterized in that: on the inwall of described coal bunker housing (1-1) and below being positioned at described coal-roller delivery group, be tiltedly installed with sealed liner (1-10), the inside of described coal bunker housing (1-1) is provided with the second coal flashboard (1-7), described the second coal flashboard (1-7) and the first coal flashboard (1-2) are separately positioned on the both sides of liner baffle plate (1-4), described the second coal flashboard (1-7) and the first coal flashboard (1-2) are all by the second installation shaft (1-14), steel wire rope (1-15) and connecting ring (1-16) are arranged on the inside of coal bunker housing (1-1), described the second installation shaft (1-14) is arranged on coal bunker housing (1-1), one end of described steel wire rope (1-15) is connected with the second installation shaft (1-14), the other end of described steel wire rope (1-15) is connected with connecting ring (1-16).
5. according to online low nitrogen oxygen enrichment compound combustion energy conserving system claimed in claim 4, it is characterized in that: described drying and forewarm heat exchanger (2) comprises the first outer layer sleeve (2-1) that is arranged on dynamic screen type screw coal conveyer (1-3) below, the first intermediate layer sleeve pipe (2-2), the first inner layer sleeve (2-3), the second defeated coal screw rod (2-4) and the 3rd drive motors (2-5), described the first outer layer sleeve (2-1), the first intermediate layer sleeve pipe (2-2), the first inner layer sleeve (2-3) and the second defeated coal screw rod (2-4) ecto-entad set gradually, described the 3rd drive motors (2-5) is arranged on the outside of the first inner layer sleeve (2-3) and is connected with the second defeated coal screw rod (2-4), form air duct between described the first outer layer sleeve (2-1) and the first intermediate layer sleeve pipe (2-2), form exhaust gases passes between described the first intermediate layer sleeve pipe (2-2) and the first inner layer sleeve (2-3), the tube chamber of described the first inner layer sleeve (2-3) is the smalls passage, the top of described the first inner layer sleeve (2-3) is provided with the first smalls import (2-31) of joining with discharge nozzle (1-36), and the bottom of described the first inner layer sleeve (2-3) is provided with the first smalls outlet (2-32), the top of described the first intermediate layer sleeve pipe (2-2) is provided with the gas approach (2-21) joined with boiler smoke circulating line (7), and the bottom of described the first intermediate layer sleeve pipe (2-2) is provided with exhanst gas outlet (2-22), one end of described the first outer layer sleeve (2-1) is provided with the first air intlet (2-11), and the other end of described the first outer layer sleeve (2-1) is provided with the first air outlet slit (2-12).
6. according to online low nitrogen oxygen enrichment compound combustion energy conserving system claimed in claim 5, it is characterized in that: described coal dust refining separation device comprises and is arranged on the first smalls outlet (2-32) below and carries out the coal-grinding and powder-spraying machine (3-1) of milled processed and join with coal-grinding and powder-spraying machine (3-1) and for the coal dust after coal-grinding and powder-spraying machine (3-1) milled processed being delivered to low nitrogen oxygen enriched powdered coal burner (4) and the pressurization sorting that ashes is delivered to the chain coal burning boiler burner hearth bottom being carried to storehouse for the oven dry smalls that will fall through the first smalls outlet (2-32); Described coal-grinding and powder-spraying machine (3-1) comprises that second housing (3-14), the second rotating shaft (3-11), fan mill impeller (3-12), screen cloth (3-13) and 4 wheel driven move motor (3-17), one end of described second housing (3-14) has the second smalls import (3-141), described the second smalls import (3-141) is joined by smalls conveyance conduit (8) and the first smalls outlet (2-32), and the other end bottom of described second housing (3-14) has the second smalls outlet (3-142); Described the second rotating shaft (3-11) is rotatably installed in the inside of second housing (3-14), and the moving motor (3-17) of described 4 wheel driven is arranged on the outside of second housing (3-14) and is connected with the second rotating shaft (3-11) by belt (9); Described fan mill impeller (3-12) and screen cloth (3-13) all are arranged on the inside of second housing (3-14), the quantity of described fan mill impeller (3-12) and screen cloth (3-13) is a plurality of, described fan mill impeller (3-12) and screen cloth (3-13) are spaced, it is upper that described fan mill impeller (3-12) is fixedly mounted on the second rotating shaft (3-11), and described screen cloth (3-13) is fixedly mounted on the inwall of second housing (3-14).
7. according to online low nitrogen oxygen enrichment compound combustion energy conserving system claimed in claim 6, it is characterized in that: described pressurization sorting is carried storehouse to comprise gas-tight silo (3-21) and is arranged on the inner ring pipe (3-22) of gas-tight silo (3-21), and is arranged on gas-tight silo (3-21) outside aid distributing pipe and high pressure positive blower (3-23), one end of described ring pipe (3-22) joins by grey coal dust conveyance conduit (10) and the second smalls outlet (3-142), the other end of described ring pipe (3-22) is connected with power transportation pipe (11), have on described ring pipe (3-22) ash content in ring pipe (3-22) is screened to the ash content screen holes (3-221) of getting off, baffle plate (3-222) is installed on described ring pipe (3-22) and coal dust is delivered to second Venturi tube of hanging down nitrogen oxygen enriched powdered coal burner (4), described baffle plate (3-222) is arranged on the below of ash content screen holes (3-221), the bottom of described gas-tight silo (3-21) has ashes outlet (3-211), and described ashes outlet (3-211) locates to be equipped with the first Venturi tube that ashes is blown into to the chain coal burning boiler burner hearth bottom, described aid distributing pipe is comprised of main aid distributing pipe (3-241) and the first aid distributing pipe (3-242) be connected with main aid distributing pipe (3-241) and the second aid distributing pipe (3-243) three parts, described main aid distributing pipe (3-241) joins with high pressure positive blower (3-23), described the first aid distributing pipe (3-242) joins with the first pressure air blowing pipe (2-25) of described the first Venturi tube, and described the second aid distributing pipe (3-243) joins with the second pressure air blowing pipe (2-26) of described the second Venturi tube.
8. according to online low nitrogen oxygen enrichment compound combustion energy conserving system claimed in claim 7, it is characterized in that: described high pressure positive blower (3-23) also connects the heat pipe preheater for the coal dust of ring pipe (3-22) is carried out to preheating, described heat pipe preheater is comprised of preheating can and the economizer bank (3-32) that is arranged on described preheating can inside, described preheating can is comprised of the air tank be connected (3-311) and flue gas tank (3-312), the quantity of described economizer bank (3-32) is many, one end of described economizer bank (3-32) is positioned at the inside of air tank (3-311), the other end of described economizer bank (3-32) is positioned at the inside of flue gas tank (3-312), the upper end of described flue gas tank (3-312) has high-temperature waste flue gas import (12), the lower end of described flue gas tank (3-312) has the useless exhanst gas outlet (13) of the low temperature that passes into chain coal burning boiler fire grate (6), and described high-temperature waste flue gas import (12) is joined by high-temperature flue gas pipeline (14) and boiler smoke circulating line (7), the upper end of described air tank (3-311) has the second air intlet (15), and the lower end of described air tank (3-311) has the second air outlet slit (16), and described the second air outlet slit (16) joins with high pressure positive blower (3-23).
9. according to the described online low nitrogen oxygen enrichment compound combustion energy conserving system of claim 7 or 8, it is characterized in that: described low nitrogen oxygen enriched powdered coal burner (4) comprises the second outer layer sleeve (4-1), the second intermediate layer sleeve pipe (4-2), the second inner layer sleeve (4-3), coal powder supervisor (4-4) and air distribution supervisor (4-5), described the second outer layer sleeve (4-1), the second intermediate layer sleeve pipe (4-2) and the second inner layer sleeve (4-3) ecto-entad set gradually, described the second outer layer sleeve (4-1) is arranged on chain coal burning boiler (5) by mounting flange (4-11), described coal powder supervisor (4-4) and air distribution supervisor (4-5) all are arranged on the outside of chain coal burning boiler (5), form a level air-distribution passage (17) between the second outer layer sleeve (4-1) and the second intermediate layer sleeve pipe (4-2), form two level air-distribution passages (18) between described the second intermediate layer sleeve pipe (4-2) and the second inner layer sleeve (4-3), the one-level aid distributing pipe (17-1) be communicated with a level air-distribution passage (17) and the secondary aid distributing pipe (18-1) communicated with two level air-distribution passages (18) are installed on described the second outer layer sleeve (4-1), described coal powder supervisor's (4-4) an end and the second inner layer sleeve (4-3) join, and described coal powder supervisor's (4-4) the other end and power transportation pipe (11) join, described air distribution supervisor's (4-5) shape is in the shape of the letter V, described air distribution supervisor's (4-5) a end is arranged on the inside of the second inner layer sleeve (4-3), described air distribution supervisor's (4-5) the other end joins with the first air outlet slit (2-12) by air duct (19) and burner blower fan (22), described burner blower fan (22) is arranged on air duct (19), described air distribution supervisor's (4-5) inside is equipped with revolves core (4-51), and the described core (4-51) that revolves is arranged on the air distribution supervisor (4-5) who is positioned at the second inner layer sleeve (4-3) inside.
10. according to the described online low nitrogen oxygen enrichment compound combustion energy conserving system of arbitrary claim in claim 5-8, it is characterized in that: described exhanst gas outlet (2-22) is connected with low-temperature flue gas pipeline (20), and described exhanst gas outlet (2-22) is by low-temperature flue gas pipeline (20) and be arranged on the low-temperature flue gas that flue gas recirculation blower fan (21) on low-temperature flue gas pipeline (20) will flow out through exhanst gas outlet (2-22) and pass into chain coal burning boiler fire grate (6).
CN2012102081540A 2012-06-23 2012-06-23 Online low-nitrogen oxygen-rich combined combustion energy-saving system Expired - Fee Related CN102721041B (en)

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CN106642186B (en) * 2016-11-27 2019-04-12 宁波高新区世代能源科技有限公司 Coal-fired excess pure oxygen burning desulphurization denitration processing method
CN106642181B (en) * 2016-11-27 2019-08-13 宁波高新区世代能源科技有限公司 The control system of coal-fired boiler of high-efficient energy-saving environment friendly
CN108662609A (en) * 2018-05-21 2018-10-16 北京航天石化技术装备工程有限公司 A kind of oxygen-enriched combusting heat-conducting oil furnace air and gas system

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