CN207455621U - A kind of lower heat of combustion coal gas obtains the high effective flue gas furnace apparatus of high wind-warm syndrome - Google Patents

A kind of lower heat of combustion coal gas obtains the high effective flue gas furnace apparatus of high wind-warm syndrome Download PDF

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Publication number
CN207455621U
CN207455621U CN201721375786.0U CN201721375786U CN207455621U CN 207455621 U CN207455621 U CN 207455621U CN 201721375786 U CN201721375786 U CN 201721375786U CN 207455621 U CN207455621 U CN 207455621U
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China
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gas
combustion
burner
flue gas
heat
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CN201721375786.0U
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Chinese (zh)
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李兹焕
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湖南华菱节能环保科技有限公司
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Abstract

A kind of lower heat of combustion coal gas of the utility model obtains the high effective flue gas furnace apparatus of high wind-warm syndrome, specifically includes:Burner, combustion chamber and mixing chamber;The burner is grid type, by lower burner pillar and upper multilayer fire grate structure composition;The burner be equipped with blast furnace gas entrance and combustion air inlet, the two to set punching arrangement;The air duct and gas passage of interlaced arrangement are equipped in the burner;The burner is supported on by burner pillar on flue gas furnace base;Mixing chamber is the double-layer sleeve structure equipped with low temperature waste gas entrance, low temperature waste gas entrance is preposition to be arranged on the outer layer of double-layer sleeve structure, circular passage is formed between inside and outside layer, internal layer is equipped with several cylindrical spray orifices set in different angle, and internal layer surrounds flue collector.The utility model obtains high warm air after can the flue gas that obtained after lower heat of combustion coal gas be mixed with low temperature waste gas, and the present apparatus is simple in structure, high combustion efficiency, heat storage capacity are strong, complete stability.

Description

A kind of lower heat of combustion coal gas obtains the high effective flue gas furnace apparatus of high wind-warm syndrome
Technical field
The utility model is related to the flue gas waste heat recoveries technologies such as a kind of smelter coking, sintering, ironmaking, belong to energy saving skill Art field more particularly to a kind of lower heat of combustion coal gas obtain the high effective flue gas furnace apparatus of high wind-warm syndrome.
Background technology
Heat recovery technology refers to be discharged or taken with energy equipment and product to various in various industrial circle production processes The thermal energy for taking recovery value out of is recycled, and the energy of industrial processes consumption is reasonably filled up, usually by high temperature cigarette Gas waste heat recovery apparatus generates steam to generate electricity, and low-temperature flue gas is used to dry unclassified stores or for preheating other media. Such as sintering waste heat generating technology, hot-blast stove air gas preheating technique, hot-blast stove fume are used for coal powder injection dry technology.
But in actual production process, since field working conditions are complicated, process equipment fluctuation of service is returned into waste heat There is the unstable situation of temperature in the waste heat heat source of receiving unit, cannot be transported so as to cause waste heat recovery apparatus under rated load Row, it is impossible to which the requirement or even safe operation for meeting subordinate subscriber can not be protected, and reduce service life of equipment.
Therefore, in order to ensure that waste heat heat source is stablized, it is necessary on the basis of existing technology, a kind of afterburning is set to fill It puts, it is necessary to be blended into high-temperature flue gas and form mixed flue gas.Stable high-temperature flue gas is provided, be beneficial to improve heat recovery efficiency and Overall heat exchange device utilization ratio of device.
Blast furnace gas is the byproduct of iron and steel enterprise, since its calorific value of gas is low, more or less exists and diffuses, in recent years Iron and steel enterprise's Gas Resource efficiently uses and drops production cost needs, and high heating value gas (particularly coke-stove gas) resource becomes In short supply, low-heat value gas efficiently realizes high wind-warm syndrome using exactly burning using the Experience of Using Single Bf Gas inexpensively diffused.
Current combustion gas furnace generally existing is insufficient as follows:1. the not high incomplete of gas-fireds of the flue gas burner thermal efficiency It is mainly manifested in the higher of CO contents in exiting flue gas and security risk is caused to the production of follow-up system;2. burner hearth heat storage capacity is weak, Fuel system be easy to cause the extinguishing of burner hearth flame when fluctuating, and then influences follow-up system continuous production;3. high-temperature flue gas with it is low Warm exhaust gas mixes uneven and be easy to cause the production accidents such as exhanst gas outlet pipeline is rubescent, deformation is even caved in.
Utility model content
The technical problem to be solved by the present invention is to provide the combustion gas furnaces that a kind of lower heat of combustion coal gas obtains high warm air Device obtains the combustion gas furnace of high warm air after specifically the flue gas obtained after lower heat of combustion coal gas is mixed with low temperature waste gas Device, the combustion gas furnace apparatus structure is simple, high combustion efficiency, heat storage capacity are strong, complete stability;The conjunction come out from flue gas furnace apparatus Lattice high-temperature flue gas can be adapted for that the coal spraying process of high-temperature flue gas, hot-blast stove space gas double-preheating system, coke oven flue gas is needed to take off Sulphur denitration waste heat recovery integral system or sintering circular-cooler concurrent heating electricity generation system etc..
In order to solve the above-mentioned technical problem, the utility model uses following technical scheme:
The high effective flue gas furnace apparatus that a kind of lower heat of combustion coal gas obtains high wind-warm syndrome is provided, is specifically included:
Burner, combustion chamber and the mixing chamber set gradually from lower to upper;Between burner, combustion chamber and mixing chamber mutually Connection;
The burner is grid type, and by lower burner pillar and upper multilayer fire grate structure composition, burner leads to Burner pillar is crossed to be supported on flue gas furnace base;Burner pillar is used to support multilayer fire grate structure and water conservancy diversion sky, coal gas;
The burner is equipped with blast furnace gas entrance and combustion air inlet, blast furnace gas entrance and combustion air inlet pair Punching arrangement (being may be provided with if necessary with coke-stove gas entrance);If it is equipped in the burner pillar by arterial highway heat-proof nodular cast iron Several long and narrow rectangle combustion air passages and blast furnace coal that part (other heating resisting metal parts replacement can also be used) is separated into Gas passage, combustion air passage and blast furnace gas passage interlaced arrangement, blast furnace gas lead to combustion air from blast-furnace gas respectively It is sprayed in road and combustion air passage;
Preferably, refractory material masonry can be used in upper multilayer fire grate minor structure;
Combustion chamber is located at the middle part of combustion gas furnace, and combustion chamber is burnt in the combustion chamber for tissue blast furnace gas and combustion air Generate high-temperature flue gas;
The mixing chamber is big cavity double-layer sleeve structure, and mixing chamber is equipped with low temperature waste gas entrance, and the low temperature waste gas enters Mouth is preposition on the outer layer of double-layer sleeve structure, and circular passage is formed between outer layer and internal layer, and internal layer is equipped with several in not With the cylindrical spray orifice that angle is set, internal layer surrounds flue collector.
The big cavity double-layer sleeve structure of mixing chamber, on the one hand can be so that enter the low temperature waste gas edge before combination of combustion gas furnace Its circumference direction is evenly distributed with, and then is mixed uniformly through internal layer cylinder spray orifice with the high-temperature flue gas after burner combustion, is promoted Uniform efficiency, on the other hand, double-layer sleeve structure can also efficiently reduce heat and scatter and disappear, and improve furnace thermal efficiency;Mixing chamber Circular passage and the structure design of cylindrical spray orifice, it is ensured that low temperature waste gas is uniformly mixed with flue gas.
Further,
The multilayer fire grate structure includes the fire grate one set gradually from lower to upper and fire grate two, one He of fire grate Fire grate two uses walled structure;
The fire grate one can be the overall structure of the strip checkerwork cell with multiple rotary settings of interlocking up and down, can also It is staggeredly to rotate the checkerwork cell part rotation for being stacked the fire grate for making adjacent layer up and down by multiple fire grates equipped with rectangle checkerwork cell Stagger;
The fire grate two can be the overall structure of the square checkerwork cell with multiple rotary settings of interlocking up and down, can also It is staggeredly to rotate the checkerwork cell part rotation for being stacked the fire grate for making adjacent layer up and down by multiple fire grates equipped with positive rectangle checkerwork cell Turn to stagger.
Preferably, each checkerwork cell uses refractory material pouring molding.
On the basis of combustion air and blast furnace gas multichannel interlaced arrangement, matched somebody with somebody by the design of multilayer fire grate structure It closes, passes through the fire grate one in multilayer fire grate structure and the checkerwork cell of the rotary setting of interlocking up and down of fire grate two so that blast furnace Coal gas, combustion air form spiral air-flow, and be equivalent to increases by one section of rotation spray in each combustion air, the blast furnace gas port of export Head, and air, coal gas is oppositely oriented by the convection current of air and coal gas, reaches being sufficiently mixed for coal gas and air.
Blast furnace gas is with combustion air through jet mixing, and into multihearth grate structure, (multi-layer porous combination is built after mixing Body) in complete the high temperature preheating and concentration of mixed gas, and the high-intensity combustion of fast and stable, so as to effectively solve low heat value The key issues such as gas-fired is unstable, and combustion intensity is weak, and ignition temperature is low.It will be between traditional blast furnace gas and combustion air The long flame combustion system for the occupancy combustion space burnt in mixing changes into premixed flow, by means of multilayer fire grate structure The non flame combustion mode of the big contact pre-heated gaseous mixture in surface of (multi-layer porous combined masonry) composition, effectively reduces existing vertical Formula combustion furnace whole height, makes technology arrangement more flexible.
Further,
Divide in the burner pillar on nearly combustion gas furnace seating plane with the windward side of combustion air inlet, blast furnace gas import Inclined surface that She You be 25-45 °.
Preferably, the inclined surface by ramming mass ramming into, beneficial to tissue air-flow, enhancing heat transfer.
Further,
Thermocouple and pressure sensor are equipped in the burner hearth of the combustion chamber, fire box temperature, pressure are carried out online real-time Monitoring;
The outer wall of combustion chamber is equipped with glory hole and inspection manhole, flame observation close to the top of multilayer fire grate structure Ignition system at hole is set and is equipped with high temperature picture pick-up device.
Coke-stove gas ignition system kept burning day and night can be used in ignition system if necessary.
High temperature picture pick-up device can be observed the combustion case inside burner hearth, it is ensured that flame exists along combustion furnace inner wall It is uniformly distributed on circumferencial direction, the length of flame is shorter, flameholding.
Further,
Recuperation layer is equipped in the combustion chamber, increases heating surface;Firebreak is set in burner ends simultaneously, It is appropriate to increase burner hearth drag on the basis of ensureing air-flow by area, combustion flame is prevented to spread to mixing section, improves burner hearth Temperature.
Preferably, the recuperation layer uses accumulation of heat checker brick.
Preferably, the firebreak uses grid brick masonry.
Further,
The angle of cylindrical spray orifice and horizontal direction on the mixing chamber double-layer sleeve structure internal layer is 30-60 °.
Further,
The mixing chamber is additionally provided with mixed flue gas outlet, and the mixed flue gas outlet connects follow-up need by outlet conduit The system of heat smoke, the system for needing heat smoke can be coal injection system, hot-blast stove space gas double-preheating system, coke oven cigarette Desulfurization denitration waste heat recovery integral system or sintering circular-cooler concurrent heating electricity generation system etc..
Further,
The low temperature waste gas come out from external hot-blast stove flue can be introduced from low temperature waste gas entrance by high temperature draught fan and mixed The circular passage of room.
When the utility model at work, low-heat value gas, combustion air pass through burning from gas entry, air intake respectively Device pillar water conservancy diversion enters gas passage, air duct in burner;Since gas passage, combustion air passage are to staggeredly cloth It puts, coal gas, air draught in multiply to entering in burner;The multilayer fire grate structure set from the port of export of burner goes out To be sufficiently mixed, (multilayer fire grate structure is equivalent to the grid partition wall in the outlet section formation multistage spinfunction of burner With spiral tricyclic burner), in the top of fire grate two by igniting system catches fire burning, formed tens even up to a hundred small Burner.
The low temperature waste gas entrance of the utility model combustion gas furnace mixing chamber is preposition, increases mixed wind chamber and forms double-layer sleeve structure, On the one hand so that the hot wind exhaust gas into combustion gas furnace is evenly distributed with before combination along its circumference direction, and then uniformly across in difference The spray orifice of angle is mixed with high-temperature flue gas, promotes uniform efficiency;Another aspect double-layer sleeve structure can reduce heat and scatter and disappear, and carry High thermal efficiency, can be effectively prevented from combustion gas furnace high-temperature flue gas and exhaust gas of hot-blast stove mixes uneven and causes the local temperature of exiting flue gas Superelevation is spent, so as to cause the rubescent deformation of fume furnace outlet pipeline, easily caves in cause production accident for a long time.
The utility model increases heating surface by being equipped with recuperation layer in the burner hearth of combustion furnace, while in combustion furnace end It is appropriate to increase burner hearth drag on the basis of ensureing air-flow by area using firebreak.The combustion gas furnace has heat storage capacity By force, stability is good, be not easy to extinguish or extinguish after resume combustion ability it is strong, the security of system can be greatly enhanced, simultaneously because firebreak Presence, combustion flame can further be prevented to spread to mixing section, improve fire box temperature.Production practices show:Increase firebreak About 50 DEG C or so of fire box temperature can be improved.At the same time, the exhanst gas outlet pipeline superhigh temperature phenomenon of combustion gas furnace significantly reduces, pipe The situation of the rubescent deformation in road can effectively be alleviated.
In the utility model flue gas furnace apparatus mixing chamber smoke mixing section, the low-temperature flue gas of sintering or coke oven or hot-blast stove etc. It is conveyed by flue gas flue collector, the cross sectional shape of flue gas flue collector is depending on process requirements and in-site installation position, combustion furnace Flue gas is injected by high-temperature flue gas circuit in flue gas flue collector after burning.High-temperature flue gas after concurrent heating enters the main cigarette of flue gas through spray orifice Behind road, carrying out the injection of multithread stock with the flue gas in flue collector and blend so that big section flue gas is rapid in flue collector, is sufficiently mixed, It can effectively avoid occurring flue gas part high/low temperature accumulation regions in flue gas flue collector, improve the flow field uniformity of flue gas in flue collector, The temperature difference in flue gas section is reduced, effectively improves denitrating flue gas effect, extends the service life of denitration subsequent process equipment.
Qualified flue gas through the utility model flue gas furnace apparatus after mixing out is through exhanst gas outlet pipeline into subsequently The technique for needing heat smoke, such as coal spraying process, hot-blast stove space gas double-preheating system, coke oven flue gas desulphurization denitration waste heat recovery Integral system, sintering circular-cooler concurrent heating electricity generation system etc..
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the overall structure diagram of the utility model embodiment high effective flue gas furnace apparatus;
Fig. 2 is the A-A cross sectional plan views of Fig. 1;
Fig. 3 is the top view of the utility model embodiment fire grate one;
Fig. 4 is the top view of the utility model embodiment fire grate two;
Fig. 5 is the utility model embodiment burner gas passage sectional view;
Fig. 6 is the utility model embodiment burner air channel cross-section figure.
Specific embodiment
Utility model is further illustrated with reference to the accompanying drawings and embodiments, but is not limited to the model of the utility model It encloses.
As shown in figures 1 to 6, the utility model provides the high-efficiency tobacco steam stove dress that a kind of lower heat of combustion coal gas obtains high wind-warm syndrome It puts, specifically includes:
Burner 1, combustion chamber 2 and the mixing chamber 3 set gradually from lower to upper;Burner 1, combustion chamber 2 and mixing chamber 3 it Between be interconnected;
Burner 1 is grid type, by lower burner pillar 11 and upper multilayer fire grate structure composition, upper multilayer stove Grate structure uses refractory material masonry, and multilayer fire grate structure includes the fire grate 1 and fire grate that set gradually from lower to upper Using walled structure, fire grate 1 can staggeredly be rotated up and down with multiple for son 24, fire grate 1 and fire grate 24 The overall structure of the strip checkerwork cell of setting or rotation phase of being interlocked up and down by multiple fire grates equipped with rectangle checkerwork cell The checkerwork cell part rotational offset for folding the fire grate for making adjacent layer forms;
Fire grate 24 can be with it is multiple up and down interlock rotary settings square checkerwork cell overall structure or Staggeredly rotate the checkerwork cell part rotation for being stacked the fire grate for making adjacent layer up and down by multiple fire grates equipped with positive rectangle checkerwork cell Stagger.
Each checkerwork cell uses refractory material pouring molding.
Coal gas and combustion air can be encroached on the flat stream stock into very thin thickness by the rectangle checkerwork cell of fire grate 1, so Blast furnace gas and combustion air are encroached on into multiply miniature air stream in the square checkerwork cell by fire grate 24 afterwards, and in fire grate The top of son 24 obtains mixing ignition, forms tens even up to a hundred small burners.
On the basis of combustion air and blast furnace gas multichannel interlaced arrangement, matched somebody with somebody by the design of multilayer fire grate structure It closes, is designed, made by the checkerwork cell of the fire grate 1 in multilayer fire grate structure and the rotary setting of interlocking up and down of fire grate 24 Blast furnace gas, combustion air form spiral air-flow, be equivalent to increases by one section of rotation in each combustion air, the blast furnace gas port of export Turn nozzle, and air, coal gas is oppositely oriented, by the convection current of air and coal gas, reach being sufficiently mixed for coal gas and air.
Blast furnace gas is with combustion air through jet mixing, and into multihearth grate structure, (multi-layer porous combination is built after mixing Body) in complete the high temperature preheating and concentration of mixed gas, and the high-intensity combustion of fast and stable, so as to effectively solve low calorific value coal Gas combustion instability, the key issues such as combustion intensity is weak, and ignition temperature is low.By the side between traditional blast furnace gas and combustion air The long flame combustion system of the occupancy combustion space of mixing side burning changes into premixed flow, (more by means of multilayer fire grate structure Layer porous combination masonry) what is formed contacts greatly the non flame combustion mode of the pre-heated gaseous mixture in surface, it effectively reduces existing vertical Combustion furnace whole height makes technology arrangement more flexible.
Burner 1 is supported on by burner pillar 11 on flue gas furnace base;Burner pillar 11 is used to support multihearth Grate structure and water conservancy diversion sky, coal gas;
Burner 1 is equipped with blast furnace gas entrance 12 and combustion air inlet 13, and blast furnace gas entrance 12 enters with combustion air Mouthfuls 13 liquidate arrangement;It is equipped in burner pillar 11 and if other heating resisting metal parts (can also be used by arterial highway heat-proof nodular cast iron part Substitute) several long and narrow rectangle combustion air passages for being separated into and blast furnace gas passage, combustion air passage and blast furnace Gas passage interlaced arrangement;
To obtain 450~650 DEG C of higher exhaust gas, the heat-proof nodular cast iron part in the present embodiment in burner pillar uses Heat-proof nodular cast iron RQTSi4Mo;
Combustion chamber 2 is located at the middle part of combustion gas furnace, and combustion chamber 2 is for tissue blast furnace gas and combustion air in combustion chamber 2 Burning generation high-temperature flue gas;
Mixing chamber 3 is big cavity double-layer sleeve structure, and mixing chamber 3 is equipped with low temperature waste gas entrance 31, low temperature waste gas entrance 31 On the preposition outer layer 32 for being arranged on double-layer sleeve structure, circular passage is formed between outer layer 32 and internal layer 33, internal layer 33 is equipped with Several cylindrical spray orifices 331 set in different angle, internal layer surrounds flue collector.
The big cavity double-layer sleeve structure of mixing chamber 3, on the one hand can be so that enter the low temperature waste gas of combustion gas furnace before combination It is evenly distributed with along its circumference direction, and then is mixed uniformly through internal layer cylinder spray orifice 331 and the high-temperature flue gas after the burning of burner 1 It closes, promotes uniform efficiency, on the other hand, double-layer sleeve structure can also efficiently reduce heat and scatter and disappear, and improve furnace thermal efficiency;It is mixed Close the circular passage of room and the structure design of cylindrical spray orifice 331, it is ensured that low temperature waste gas is uniformly mixed with flue gas.
Distinguish in burner pillar 11 on nearly combustion gas furnace seating plane with the windward side of combustion air inlet, blast furnace gas import Equipped with 25-45 ° of inclined surface.
The present embodiment uses 45 ° of inclined surface 6, and inclined surface 6 is by ramming mass ramming into beneficial to tissue air-flow, enhancing heat transfer;Incline Inclined-plane 6 can prevent combustion air or blast furnace gas from carrying out circulation without entering respective channel.
Thermocouple and pressure sensor are equipped in the burner hearth of combustion furnace 2, online prison in real time is carried out to fire box temperature, pressure It surveys;
The outer wall of combustion furnace 2 is equipped with igniting, flame observation and inspection close to the top of the fire grate 24 of multilayer fire grate structure The manhole 21 repaiied is provided with ignition system at manhole 21.Ignition system uses ever-burning flame ignition system.
High temperature picture pick-up device can be observed the combustion case inside burner hearth, it is ensured that flame exists along combustion furnace inner wall It is uniformly distributed on circumferencial direction, the length of flame is shorter, flameholding.
Accumulation of heat checker brick are equipped in 2 burner hearth of combustion chamber, increase heating surface;Set grid brick in burner ends simultaneously The firebreak built, it is appropriate to increase burner hearth drag on the basis of ensureing air-flow by area, combustion flame is prevented to spread to mixed Section is closed, improves fire box temperature.
The mixing chamber double-layer sleeve structure internal layer 33 is equipped with the cylinder that several angles with horizontal direction are 30-60 ° Shape spray orifice 331.
Mixing chamber 3 is additionally provided with mixed flue gas outlet 6, and mixed flue gas outlet 6 subsequently needs hot cigarette by outlet conduit connection The system of gas, the system for needing heat smoke can take off for coal injection system, hot-blast stove space gas double-preheating system, coke oven flue gas Sulphur denitration waste heat recovery integral system or sintering circular-cooler concurrent heating electricity generation system etc..
It is introduced and mixed from low temperature waste gas entrance 31 by high temperature draught fan from the low temperature waste gas that external hot-blast stove flue comes out The circular passage of room 3.
The present embodiment mainly includes burner 1, combustion chamber 2 and mixing chamber 3, and burner 1 is by gas entry, air intake group Into can be equipped with if necessary with coke-stove gas entrance.Main portions of the combustion chamber 2 as blast furnace gas combustion, by laying fireproof bricks It forms.Thermocouple and pressure sensor are equipped in the burner hearth of combustion chamber 2, on-line real time monitoring is carried out to fire box temperature, pressure.It is mixed Conjunction room is high-temperature flue gas and low temperature waste gas mixing place, and (stainless steel heat-resistant material, uniformly distributed circle are thoroughly through mixed aerofoil for exhaust gas of hot-blast stove Air holes) mixing chamber is blended into, qualified flue gas after mixing enters the technique for subsequently needing heat smoke through exhanst gas outlet pipeline.
At work, low combustion value furnace gas, combustion air are logical from gas entry 12, air intake 13 respectively for the present embodiment It crosses 11 water conservancy diversion of burner pillar and enters gas passage, air duct in burner 1;Due to gas passage, combustion air passage To interlaced arrangement, coal gas, air draught in multiply to entering in burner;The multilayer set from the port of export of burner 1 Fire grate minor structure is out sufficiently mixed, and (multilayer fire grate structure is equivalent to the outlet section formation multistage rotational work in burner The grid partition wall and spiral tricyclic burner of energy), in the top of fire grate 24 by igniting system catches fire burning, form tens A or even up to a hundred small burner.
Since the low temperature waste gas 31 of the present embodiment mixing chamber 3 is preposition, it can increase and mix wind chamber formation double-layer sleeve structures, one Aspect so that the hot wind exhaust gas into combustion gas furnace is evenly distributed with before combination along its circumference direction, and then uniformly across spray orifice and height Warm flue gas mixing, promotes uniform efficiency;Another aspect double-layer sleeve structure can reduce heat and scatter and disappear, and improve the thermal efficiency, can have Combustion gas furnace high-temperature flue gas and exhaust gas of hot-blast stove is avoided to effect to mix uneven and cause exiting flue gas local temperature superelevation, so as to lead The rubescent deformation of fume furnace outlet pipeline is caused, easily caves in cause production accident for a long time.
Due to being equipped with accumulation of heat checker brick in the burner hearth of combustion furnace 2, increase heating surface.It is adopted simultaneously in 2 end of combustion furnace It is appropriate to increase burner hearth drag on the basis of ensureing air-flow by area with grid brick masonry firebreak.The combustion gas furnace has Heat storage capacity is strong, stability is good, be not easy to extinguish or extinguish after resume combustion ability it is strong, can greatly enhance the security of system, at the same by In the presence of firebreak, combustion flame can further be prevented to spread to mixing section, improve fire box temperature.Production practices show:Increase Add firebreak that can improve about 50 DEG C or so of fire box temperature.At the same time, the exhanst gas outlet pipeline superhigh temperature phenomenon of combustion gas furnace is bright Aobvious to reduce, the situation of the rubescent deformation of pipeline can effectively be alleviated.
In 3 smoke mixing section of this flue gas furnace apparatus mixing chamber, the low-temperature flue gas selection of sintering or coke oven or hot-blast stove etc. can Conveyed by flue gas flue collector after transformation, flue gas flue collector transformation after cross sectional shape according to process requirements and in-site installation position and It is fixed, then being injected by high-temperature flue gas circuit in flue gas flue collector after combustion furnace burning.High-temperature flue gas after concurrent heating is through spray orifice Into after flue gas flue collector, carry out the injection of multithread stock with the flue gas in flue collector and blend, big section flue gas is fast in the flue collector made Speed is sufficiently mixed, and effectively avoids occurring flue gas part high/low temperature accumulation regions in flue gas flue collector, improves the stream of flue gas in flue collector Field uniformity reduces the temperature difference in flue gas section, effectively improves denitrating flue gas effect, and extend denitration subsequent process equipment uses the longevity Life.
The present embodiment can be suitble to the SCR technology of coke oven flue exhaust gas denitration, during concrete application, be controlled back by blast furnace gas Road control makes blast furnace gas enter described device burning, the gas after burning into the blast furnace coal tolerance of the flue gas furnace apparatus After being mixed with the exhaust gas in flue gas pipeline into the smoke mixing section, form 330 DEG C of flue gas and enter denitration and remaining Recuperation of heat integrated apparatus is most discharged, wherein flue gas after the denitration and the processing of waste heat recovery integrated apparatus from chimney afterwards The high temperature flue gas (smoke temperature is adjustable) that mixer is formed is adjusted to the reaction temperature of optimal SCR, can reach in maximum removal flue gas The purpose of NOX avoids the Ammonium hydrogen sulfate because coke oven flue smoke temperature is low, produced in denitrification process and causes catalyst failure, takes off The problem of nitre tower is unable to operate normally;The low pressure generated simultaneously using the waste heat boiler recycling waste heat of coke-oven flue gas of integrated apparatus Saturated vapor is used by oneself for coke-oven plant, can not only achieve the purpose that energy saving, also increases economic benefit.For example, produce 1100000 tons of coke per year The recyclable 1.0MPa low-pressure saturated steams in coke-oven plant be about 16t/h, year recovered steam income 15,000,000;And present apparatus structure It is compact, it takes up little area, reduces air and gas system resistance, flue gas waste heat recovery efficiency is seen in raising, and coke oven flue side is suitble to take up an area anxiety Present situation, convenient for operation and maintenance.
The advantages of basic principle, main feature and the utility model of the utility model has been shown and described above.One's own profession The technical staff of industry is it should be appreciated that the present utility model is not limited to the above embodiments, described in above embodiments and description Simply illustrate the principle of the utility model, the utility model can also on the premise of not departing from the spirit and scope of the utility model There are various changes and modifications, these various changes and improvements fall within the scope of the claimed invention.The utility model will Protection domain is asked to be defined by appended claims and its equivalent.

Claims (7)

1. a kind of lower heat of combustion coal gas obtains the high effective flue gas furnace apparatus of high wind-warm syndrome, which is characterized in that specifically includes:
Burner, combustion chamber and the mixing chamber set gradually from lower to upper;It is mutually interconnected between burner, combustion chamber and mixing chamber It is logical;
The burner is grid type, and by lower burner pillar and upper multilayer fire grate structure composition, burner passes through combustion Burner pillar is supported on flue gas furnace base;Burner pillar is additionally operable to support multilayer fire grate structure and water conservancy diversion sky, coal gas;
The burner is equipped with blast furnace gas entrance and combustion air inlet, and blast furnace gas entrance and combustion air inlet liquidate cloth It puts;If the combustion-supporting sky of several long and narrow rectangles being separated by arterial highway heat-proof nodular cast iron part is equipped in the burner pillar Gas passage and blast furnace gas passage, combustion air passage and blast furnace gas passage interlaced arrangement;
The mixing chamber is big cavity double-layer sleeve structure, and mixing chamber is equipped with low temperature waste gas entrance, before the low temperature waste gas entrance It is arranged on the outer layer of double-layer sleeve structure, circular passage is formed between outer layer and internal layer, it is in different angles that internal layer, which is equipped with several, The cylindrical spray orifice set is spent, internal layer surrounds flue collector.
2. a kind of lower heat of combustion coal gas according to claim 1 obtains the high effective flue gas furnace apparatus of high wind-warm syndrome, feature It is,
The multilayer fire grate structure includes the fire grate one set gradually from lower to upper and fire grate two, fire grate one and fire grate Son two uses walled structure;
The fire grate one is the overall structure of the strip checkerwork cell with multiple rotary settings of interlocking up and down or is set by multiple Having the fire grate of rectangle checkerwork cell, staggeredly rotation is stacked the checkerwork cell part rotational offset of the fire grate for making adjacent layer and forms up and down;
The fire grate is second is that the overall structure of the square checkerwork cell with multiple rotary settings of interlocking up and down or set by multiple Having the fire grate of positive rectangle checkerwork cell, staggeredly rotation is stacked the checkerwork cell part rotational offset of the fire grate for making adjacent layer and forms up and down.
3. a kind of lower heat of combustion coal gas according to claim 1 obtains the high effective flue gas furnace apparatus of high wind-warm syndrome, feature It is,
Windward side in the burner pillar on nearly combustion gas furnace seating plane with combustion air inlet, blast furnace gas import is set respectively There is 25-45 ° of inclined surface.
4. a kind of lower heat of combustion coal gas according to claim 1 obtains the high effective flue gas furnace apparatus of high wind-warm syndrome, feature It is,
Thermocouple and pressure sensor are equipped in the burner hearth of the combustion chamber, on-line real time monitoring is carried out to fire box temperature, pressure;
The outer wall of combustion chamber is equipped with the manhole of igniting, flame observation and maintenance, manhole close to the top of multilayer fire grate structure Place is provided with ignition system and is equipped with high temperature picture pick-up device.
5. a kind of lower heat of combustion coal gas according to claim 1 obtains the high effective flue gas furnace apparatus of high wind-warm syndrome, feature It is,
Recuperation layer is equipped in the combustion chamber, while firebreak is set in burner ends.
6. a kind of lower heat of combustion coal gas according to claim 1 obtains the high effective flue gas furnace apparatus of high wind-warm syndrome, feature It is,
The angle of cylindrical spray orifice and horizontal direction on the mixing chamber double-layer sleeve structure internal layer is 30-60 °.
7. a kind of lower heat of combustion coal gas according to claim 1 obtains the high effective flue gas furnace apparatus of high wind-warm syndrome, feature It is,
The mixing chamber is additionally provided with mixed flue gas outlet, and the mixed flue gas outlet subsequently needs to mend by outlet conduit connection The flue gas system of heat, the system for needing heat smoke can be coal injection system, hot-blast stove space gas double-preheating system, coke oven cigarette Desulfurization denitration waste heat recovery integral system or sintering circular-cooler concurrent heating electricity generation system.
CN201721375786.0U 2017-10-24 2017-10-24 A kind of lower heat of combustion coal gas obtains the high effective flue gas furnace apparatus of high wind-warm syndrome CN207455621U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110762839A (en) * 2019-11-28 2020-02-07 大峘集团有限公司 Anti-slagging L-shaped pulverized coal direct heating hot blast stove
CN111410996A (en) * 2020-04-15 2020-07-14 北京工业大学 Control method of biomass gasification furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110762839A (en) * 2019-11-28 2020-02-07 大峘集团有限公司 Anti-slagging L-shaped pulverized coal direct heating hot blast stove
CN111410996A (en) * 2020-04-15 2020-07-14 北京工业大学 Control method of biomass gasification furnace

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