CN109798764A - A kind of the environment-friendly and energy-efficient combustion apparatus and technique of mating bundled scrap preheating - Google Patents

A kind of the environment-friendly and energy-efficient combustion apparatus and technique of mating bundled scrap preheating Download PDF

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Publication number
CN109798764A
CN109798764A CN201910182805.5A CN201910182805A CN109798764A CN 109798764 A CN109798764 A CN 109798764A CN 201910182805 A CN201910182805 A CN 201910182805A CN 109798764 A CN109798764 A CN 109798764A
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China
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preheating
furnace
gas
air
burner
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CN201910182805.5A
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吴连卿
肖鸿飞
崔荣峰
蒲春雷
盛立新
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Huatian Engineering and Technology Corp MCC
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Huatian Engineering and Technology Corp MCC
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Priority to CN201910182805.5A priority Critical patent/CN109798764A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

The invention discloses the environment-friendly and energy-efficient combustion apparatus and technique of a kind of mating bundled scrap preheating, including preheating furnace body and preheating furnace trolley, preheating furnace trolley to operate on the track that preheating furnace body is laid with, and stacking has bundled scrap on preheating furnace trolley;The preheating furnace body is divided into two sections, and the preheating furnace body of respectively preheating section A, heating and thermal insulation section B, preheating section A and heating and thermal insulation section B are equipped with gas regenerative burner, air regenerative burner and igniter burner.The environment-friendly and energy-efficient combustion apparatus and technique of mating bundled scrap preheating proposed by the present invention, high temperature bleeder residual oxygen analytical instrument is installed, it can ensure that the volatilization burning of high temperature organic matter is complete, furnace temperature detection thermocouple with sky, gas heating regulating valve effectively cooperates, it is ensured that temperature is stable within the set range or slight fluctuations;Furnace pressure detection differential pressure transmitter and smoke evacuation regulating valve are installed, automatically adjust furnace pressure in real time, guarantees the stability of burning.

Description

A kind of the environment-friendly and energy-efficient combustion apparatus and technique of mating bundled scrap preheating
Technical field
The present invention relates to steelmaking technical field, specially a kind of environment-friendly and energy-efficient burning of mating bundled scrap preheating is set Standby and technique.
Background technique
If bundled scrap adds converter or electric furnace after being preheated to 700-800 DEG C, steel scrap not only can be sufficiently removed In moisture and debirs, reduce molten steel in air content, provide favourable conditions for the subsequent refinery practice stage;And it can be with It shortens the heat, reduces oxidation of the steel scrap in furnace, the fume amount of discharge will have biggish reduction, while decrease and removing The operating load of dirt equipment has preferable environmental protection and energy saving benefit.
Since bundled scrap inevitably contains a small amount of organic matter, such as: paint, grease, plastics etc., especially The bundled scrap of some thin materials can reduce exhaust gas temperature containing more paint etc. in order to save fuel, using conventional combustion Technology must configure longer not for hot arc or air heat exchanger, therefore problem of both will cause, on the one hand various organic Object can not completely burned, have that large amount of organic is discharged into atmosphere with chimney after not for hot arc volatilization or mixing dust is attached to and changes On hot wall face, influence to exchange heat;Gaseous organic substance in another aspect flue gas will form the plays such as a small amount of dioxin in low-temperature zone Noxious material, therefore atmospheric environment can be seriously polluted, and there is presently no the system for cleaning fume of effective low cost;It is based on This, proposes the environment-friendly and energy-efficient combustion apparatus and technique of a kind of mating bundled scrap preheating.
Summary of the invention
The purpose of the present invention is to provide the environment-friendly and energy-efficient combustion apparatus and technique of a kind of mating bundled scrap preheating, with It solves to propose in bundled scrap treatment process in above-mentioned background technique, a small amount of organic compound combustion contained can generate extremely toxic substance dirt The problem of contaminating atmospheric environment.
To achieve the above object, the invention provides the following technical scheme: a kind of environmental protection and energy saving of mating bundled scrap preheating Type combustion apparatus, including preheating furnace body and preheating furnace trolley, the preheating furnace trolley run on the interior setting of preheating furnace body Track on, the mating combustion system of preheating furnace, code on preheating furnace trolley are equipped between the preheating furnace body and preheating furnace trolley Pile has bundled scrap;The preheating furnace body is divided into two sections, and respectively preheating section A, heating and thermal insulation section B, preheating section A and heating are protected The preheating furnace body both walls top of temperature section B is equipped with gas regenerative burner, air regenerative burner and igniter burner;It is described The first space gas heat-accumulating burner spout of installation and space gas horizontal firing channel, space gas in the preheating furnace body of preheating section A Horizontal firing channel makes the horizontal flame of space gas burning, is equipped with the second sky in the preheating furnace body of heating and thermal insulation section B Gas regenerative burner spout and space gas tilt burning gallery, and space gas inclination burning gallery is in incline when space gas is burnt Ramp-like flame;The mating combustion system of preheating furnace by air side air-introduced machine, coal gas side air-introduced machine, sky, gas heating regulating valve, Combustion blower, gas main, coal gas two-bit triplet reversal valve and air two-bit triplet reversal valve are constituted as main body;It is described to help Combustion three, blower export end air pipeline be correspondingly connected with after three air conditioning valve M empty, in gas heating regulating valve with Each air two-bit triplet reversal valve connection, the gas piping of gas main outlet end three are correspondingly connected with empty, gas heating and adjust It is connect after three gas regulator door M on valve with each coal gas two-bit triplet reversal valve, air side air-introduced machine input end passes through Empty pipe is connect with each air two-bit triplet reversal valve, and coal gas side air-introduced machine input end passes through soot pipe and each coal gas The connection of two-bit triplet reversal valve;In the empty pipe that the air side air-introduced machine is connect with each air two-bit triplet reversal valve with And smoke evacuation regulating valve is mounted in the soot pipe that connect with each coal gas two-bit triplet reversal valve of coal gas side air-introduced machine.
Preferably, the preheating furnace trolley uses strip rectangular configuration.
Preferably, preheating furnace where the soaking zone of the preheating section A, the bringing-up section of heating and thermal insulation section B and heating and thermal insulation section B The furnace roof of ontology is respectively provided with 1-2 set high temperature bleeder residual oxygen analytical instrument, and configures a set of furnace pressure detection differential pressure transmitter, preheating The furnace roof of furnace body is preheated where section A, the bringing-up section of heating and thermal insulation section B and the soaking zone of heating and thermal insulation section B and furnace two sides are respectively set 6-9 branch furnace temperature detection thermocouple is set, high temperature bleeder residual oxygen analytical instrument, furnace pressure detection differential pressure transmitter and furnace temperature detect thermoelectricity It is occasionally respectively positioned on the center line of preheating furnace body.
Preferably, the furnace roof of the preheating furnace body is built using fully fibrous structure, and the side wall for preheating furnace body is adopted With high alumina brick masonry+thermal insulation material structure, preheat height between the furnace roof of furnace body and bundled scrap 1.4m-1.8m it Between.
Preferably, the gas regenerative burner, air regenerative burner, the first space gas heat-accumulating burner spout and Two space gas heat-accumulating burner spouts are built using the composite construction of low cement pouring material in the setting position of preheating furnace body side wall It sets.
Preferably, the bundled scrap is according to the distributing mode stacking of setting on preheating furnace trolley.
Preferably, the air regenerative burner and gas regenerative burner use upper and lower fabricated structure, air accumulation of heat Formula burner and gas regenerative burner are all made of asymmetric interlaced arrangement in the both walls of preheating furnace body.
Preferably, the air-flow angle of cut of the first space gas heat-accumulating burner spout of the preheating section A is horizontal, and flame is in level State, the upper burner of the first space gas heat-accumulating burner spout are coal gas heat-accumulating burner, and lower burner is air heat-accumulating burner, heating The air-flow angle of cut of second space gas heat-accumulating burner spout of the soaking zone of the bringing-up section and heating and thermal insulation section B of soaking zone B tilts Downwards, spout corresponds to the gap of bundled scrap, and upper burner is air heat-accumulating burner, and lower burner is coal gas heat-accumulating burner.
Another technical solution of the invention is to provide a kind of environment-friendly and energy-efficient burning process of mating bundled scrap preheating, Include the following steps:
S1: by bundled scrap according to the distributing mode stacking of setting on preheating furnace trolley, according to the discharging rhythm of setting Trolley realizes that circulation takes on material from preheating furnace charging one vehicle of endfeed simultaneously from discharge end one vehicle of discharging;
S2: lighting the air regenerative burner and gas regenerative burner of preheating section by igniter burner, to just entering furnace Cold conditions bundled scrap is heated, and to guarantee to stablize burning, flame is controlled in the top of bundled scrap, bundled scrap is conducive to The full combustion of surface fugitive constituent, by preheating section Control for Kiln Temperature at 850-950 DEG C;
S3: the air regenerative burner and gas regenerative burner of heating and thermal insulation section B, air regenerative burner and coal gas store The flame that hot type burner sprays obliquely passes through at a high speed bundled scrap gap, heating and thermal insulation by space gas inclination burning gallery The Control for Kiln Temperature of section B makes bundled scrap surface temperature rise rapidly to 800-850 DEG C at 800-950 DEG C;
S4: after which after above-mentioned S3 heating, the temperature of bundled scrap surface and certain depth basically reaches 800 DEG C or more, gives up The central temperature of steel briquetting also between 250-400 DEG C when, control gas regenerative burner reduce coal gas conveying, temperature is lowered It to 800-900 DEG C, and controls air regenerative burner and reduces air delivery, reduce furnace air coefficient of excess, make to be formed in furnace Pole weak oxide or reducing atmosphere reduce bundled scrap oxidization burning loss.
Compared with prior art, the beneficial effects of the present invention are: the environmental protection of mating bundled scrap preheating proposed by the present invention Energy-saving combustion apparatus and technique, high temperature bleeder residual oxygen analytical instrument, real-time monitoring inner flue gas of the stove remaining oxygen guarantee one in flue gas Fixed residual oxygen ratio, it is ensured that completely, furnace temperature detects thermocouple and empty, gas heating regulating valve is effective for high temperature organic matter volatilization burning Cooperation, it is ensured that the soaking zone of preheating section A, the bringing-up section of heating and thermal insulation section B and heating and thermal insulation section B are stable or light within the set range Microwave is dynamic;The characteristics of heating and thermal insulation section B furnace temperature is set in 850 DEG C or more, heat storage type combustion and space gas heat-accumulating burner are adopted It is arranged with asymmetric dislocation, the synthesis of extremely toxic substance dioxin can be blocked;Using coal gas two-bit triplet reversal valve and air two Three-way diverter valve, only two groups of burner reversing combustions when commutation, the influence to furnace pressure is smaller, and installation furnace pressure detects differential pressure transmitter Furnace pressure is automatically adjusted according to furnace pressure feedback signal in real time with smoke evacuation regulating valve, to guarantee the stability of burning;Integral combustion is steady It is qualitative good, organic matter can completely burned, can prevent burning from generating the violents in toxicity such as dioxin.
Detailed description of the invention
Fig. 1 is preheating furnace body overall structure diagram of the invention;
Fig. 2 is preheating section A sectional schematic diagram of the invention;
Fig. 3 is heating and thermal insulation section B sectional schematic diagram of the invention;
Fig. 4 is combustion control system figure of the invention.
In figure: 1, preheating furnace body;2, preheating furnace trolley;3, bundled scrap;4, gas regenerative burner;5, air accumulation of heat Formula burner;6, igniter burner;7, the first space gas heat-accumulating burner spout;8, space gas horizontal firing channel;9, the second empty coal Gas heat-accumulating burner spout;10, space gas tilts burning gallery;11, air side air-introduced machine;12, coal gas side air-introduced machine;13, empty, Gas heating regulating valve;14, combustion blower;15, gas main;16, coal gas two-bit triplet reversal valve;17, air two three Logical reversal valve;18, smoke evacuation regulating valve;19, high temperature bleeder residual oxygen analytical instrument;20, furnace pressure detects differential pressure transmitter;21, furnace Temperature detector calorimetric galvanic couple.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1-4, a kind of environment-friendly and energy-efficient combustion apparatus of mating bundled scrap preheating, including preheating furnace body 1 With preheating furnace trolley 2, preheating furnace trolley 2 is run on the track of the interior setting of preheating furnace body 1, preheating furnace body 1 and preheating The mating combustion system of preheating furnace is equipped between table vehicle 2, stacking has bundled scrap 3 on preheating furnace trolley 2, and preheating furnace trolley 2 is adopted With strip rectangular configuration, bundled scrap 3 according to the distributing mode stacking of setting on preheating furnace trolley 2, convenient for unloading steel scrap pressure The furnace roof of block 3, preheating furnace body 1 is built using fully fibrous structure, the side wall of preheating furnace body 1 using high alumina brick masonry+ Thermal insulation material structure preheats the height between the furnace roof and stacking bundled scrap 3 of furnace body 1 between 1.4m-1.8m, formation Space is combustion space;It is two sections that preheating furnace body 1, which is divided to, respectively preheating section A, heating and thermal insulation section B, preheating section A and heating The 1 both walls top of preheating furnace body of soaking zone B is equipped with gas regenerative burner 4, air regenerative burner 5 and igniter burner 6;The first space gas heat-accumulating burner spout 7 of installation and space gas horizontal firing channel 8 in the preheating furnace body 1 of preheating section A, it is empty The horizontal burning gallery 8 of coal gas makes the horizontal flame of space gas burning, is equipped in the preheating furnace body 1 of heating and thermal insulation section B Second space gas heat-accumulating burner spout 9 and space gas tilt burning gallery 10, and space gas inclination burning gallery 10 makes coal of having leisure Gas oblique flame, gas regenerative burner 4, air regenerative burner 5, first space gas heat-accumulating burner spout when burning 7 and second space gas heat-accumulating burner spout 9 built using the composite construction of low cement pouring material in preheating furnace body 1 side wall Setting position, and air regenerative burner 5 and gas regenerative burner 4 use upper and lower fabricated structure, air regenerative burner 5 and gas regenerative burner 4 be all made of asymmetric interlaced arrangement preheating furnace body 1 both walls on;The first of preheating section A is empty The air-flow angle of cut of gas regenerative burner spout 7 is horizontal, and flame is in a horizontal state, and space gas heat accumulating type burns combining form up and down and is Upper burner is coal gas heat-accumulating burner, and lower burner is air heat-accumulating burner;The bringing-up section of heating and thermal insulation section B and heating and thermal insulation section B's Diagonally downward, spout corresponds to the gap of bundled scrap 3 to the air-flow angle of cut of second space gas heat-accumulating burner spout 9 of soaking zone, Upper burner is air heat-accumulating burner, and lower burner is coal gas heat-accumulating burner;The mating combustion system of preheating furnace by air side air-introduced machine 11, Coal gas side air-introduced machine 12, sky, gas heating regulating valve 13, combustion blower 14, gas main 15, coal gas two-bit triplet reversal valve 16 and air two-bit triplet reversal valve 17 as main body constitute;Combustion blower 14 outlet end three air pipeline is correspondingly connected with It is connect after three air conditioning valve M empty, in gas heating regulating valve 13 with each air two-bit triplet reversal valve 17, coal gas 15 outlet end three general pipeline gas piping be correspondingly connected with after three gas regulator door M empty, in gas heating regulating valve 13 with Each coal gas two-bit triplet reversal valve 16 connects, and 11 input end of air side air-introduced machine passes through empty pipe and each air two three Logical reversal valve 17 connects, and air-introduced machine 12 input end in coal gas side is connected by soot pipe and each coal gas two-bit triplet reversal valve 16 It connects;In the empty pipe that air side air-introduced machine 11 is connect with each air two-bit triplet reversal valve 17 and coal gas side air-introduced machine 12 Smoke evacuation regulating valve 18 is mounted in the soot pipe connecting with each coal gas two-bit triplet reversal valve 16;Preheating section A, heating are protected The furnace roof of preheating furnace body 1 where the bringing-up section of temperature section B and the soaking zone of heating and thermal insulation section B is respectively provided with 1-2 set high temperature bleeder Residual oxygen analytical instrument 19, and configure a set of furnace pressure detection differential pressure transmitter 20, preheating section A, heating and thermal insulation section B bringing-up section and add 6-9 branch furnace temperature detection thermocouple 21 is respectively arranged in the furnace roof of preheating furnace body 1 and furnace two sides where the soaking zone of hot soaking zone B, high Warm bleeder residual oxygen analytical instrument 19, furnace pressure detection differential pressure transmitter 20 and furnace roof furnace temperature detection thermocouple 21 are respectively positioned on preheating furnace On the center line of ontology 1;High temperature bleeder residual oxygen analytical instrument 19 is installed, real-time monitoring inner flue gas of the stove remaining oxygen guarantees in flue gas Certain residual oxygen ratio, it is ensured that high temperature organic matter volatilization burning completely, detects thermocouple 21 and empty, gas heating tune by furnace temperature It saves valve 13 effectively to cooperate, it can be ensured that the soaking zone of preheating section A, the bringing-up section of heating and thermal insulation section B and heating and thermal insulation section B are in setting model Enclose interior stabilization or slight fluctuations.
A kind of environment-friendly and energy-efficient burning process of mating bundled scrap preheating, includes the following steps:
Step 1: preheating furnace uses continuous production mode, the operating mechanism of trolley runs control similar to the kiln car of tunnel oven Mechanism.Furnace is outer to prepare bundled scrap 3 on preheating furnace trolley 2 into furnace, preheating furnace trolley 2 according to the distributing mode stacking of setting Using strip rectangular configuration, convenient for discharging by bundled scrap 3 according to the distributing mode stacking of setting on preheating furnace trolley 2, root According to the discharging rhythm trolley of setting from preheating furnace charging one vehicle of endfeed simultaneously from discharge end one vehicle of discharging, realize that circulation takes on Material;
Step 2: stove gate of the trolley by pressure enters in furnace, the air regenerative burner 5 and coal gas accumulation of heat of preheating section Formula burner 4 heats the bundled scrap 3 on trolley, due to just into the bundled scrap of furnace 3 be room temperature, for guarantee heat accumulating type burn It is able to keep a secret to determine burning, flame is controlled in the top of bundled scrap 3, it is less that flame directly washes away bundled scrap 3, while by preheating section Top Control for Kiln Temperature is at 850-950 DEG C, can be organic by paint that 3 surface of bundled scrap is contained and grease etc. by above-mentioned burning Object gasification volatilization, and (adjust empty, gas heating regulating valve 13 by oxygen-enriched combusting and improve AIR Proportional), the organic matter that will volatilize Conflagration is totally.The air regenerative burner 5 and gas regenerative burner 4 that preheating section is lighted by igniter burner 6, to just entering The cold conditions bundled scrap 3 of furnace is heated, and to guarantee to stablize burning, flame is controlled in the top of bundled scrap 3, is conducive to give up The full combustion of 3 surface fugitive constituent of steel briquetting, by preheating section Control for Kiln Temperature at 850-950 DEG C;
Step 3: being required according to rhythm of production, the trolley for being loaded with the bundled scrap 3 that preheating is completed sequentially enters heating and thermal insulation Section B, the flame that the air regenerative burner 5 and gas regenerative burner 4 of this section spray obliquely pass through at a high speed bundled scrap 3 Gap, the Control for Kiln Temperature of heating and thermal insulation section B is at 800-950 DEG C, so that bundled scrap 3 (bundled scrap 3 and furnace under high temperature difference The temperature difference of interior temperature) fast endothermic, heating, so that 3 surface temperature of bundled scrap is risen rapidly to 800-850 DEG C, makes bundled scrap 3 It is inside and outside quickly to form the biggish temperature difference, improve heat exchange efficiency;Due to having 3 surface of part bundled scrap there are still organic matter volatilization, Therefore burning still uses oxygen-enriched combusting, the air regenerative burner 5 of the organic matter conflagration that will volatilize totally heating and thermal insulation section B With gas regenerative burner 4, the flame that air regenerative burner 5 and gas regenerative burner 4 spray is by space gas inclination combustion The oblique high speed in burn through road 10 passes through 3 gap of bundled scrap, and the Control for Kiln Temperature of heating and thermal insulation section B makes steel scrap at 800-950 DEG C 3 surface temperature of briquetting rises rapidly to 800-850 DEG C;
Step 4: after after third step heats up, the temperature of 3 surface of bundled scrap and certain depth basically reach 800 DEG C with On, the central temperature of bundled scrap 3 also between 250-400 DEG C when, the volatilization of burning substantially of organic matter contained by bundled scrap 3 is dangerous It is most, while 3 heat absorption capacity rapid decrease of bundled scrap;Due to 800 DEG C be the quick oxidization burning loss of steel billet starting point, due to steel scrap 3 large specific surface area of briquetting to reduce 3 oxidization burning loss of bundled scrap, therefore controls gas regenerative burner 4 and reduces coal gas conveying, Burner heat capacity is greatly decreased, furnace temperature is adjusted downward to 800-900 DEG C, and controls air regenerative burner 5 and reduces air delivery, Furnace air coefficient of excess is reduced, makes to form pole weak oxide or reducing atmosphere in furnace, reduces by 3 oxidization burning loss of bundled scrap; Reduce burner heat capacity, in-furnace temperature maintained 800-900 DEG C, makes bundled scrap 3 in the case where surface temperature is constant, As far as possible improve bundled scrap 3 central temperature after through above-mentioned third step heating after, the temperature of 3 surface of bundled scrap and certain depth Basically reach 800 DEG C or more, the central temperature of bundled scrap 3 also between 250-400 DEG C when, control gas regenerative burner 4 Reduce coal gas conveying, temperature is adjusted downward to 800-900 DEG C, and control air regenerative burner 5 and reduce air delivery, reduces in furnace Coefficient of excess air makes to form pole weak oxide or reducing atmosphere in furnace, reduces by 3 oxidization burning loss of bundled scrap.
The environment-friendly and energy-efficient combustion apparatus and technique of the mating bundled scrap preheating, by preheating section A, heating and thermal insulation section The furnace roof of preheating furnace body 1 where the bringing-up section of B and the soaking zone of heating and thermal insulation section B is respectively provided with the 1-2 set residual oxygen of high temperature bleeder Analyzer 19, real-time monitoring inner flue gas of the stove remaining oxygen guarantee residual oxygen ratio certain in flue gas, it is ensured that the volatilization combustion of high temperature organic matter It burns down complete;In preheating section A, in air regenerative burner 5 and the horizontal penetrating furnace of gas regenerative burner 4, and air accumulation of heat Formula burner 5 is under, and gas regenerative burner 4 is upper, so that the efficient comprehensive engagement high temperature combustion air of organic matter fugitive constituent, first Space gas heat-accumulating burner 7 exit velocities of spout are low, and dispersed combustion is formed in furnace, it is ensured that and flue gas stops 2s or more in furnace, In heating and thermal insulation section B air regenerative burner 5 and inclined 3 gap of penetrating bundled scrap of gas regenerative burner 4, this space-time For gas heat-accumulating burner 5 upper, gas regenerative burner 4 reduces directly connecing for high temperature combustion air and bundled scrap 3 to the greatest extent under Touching;Since the density of bundled scrap 3, composition, ventilative situation have uncertainty, every section of heat absorption capacity is also constantly to become Change, by preheating furnace body 1 where the soaking zone of preheating section A, the bringing-up section of heating and thermal insulation section B and heating and thermal insulation section B 6-9 branch furnace temperature detection thermocouple 21 is respectively arranged in furnace roof and furnace two sides, detects thermocouple 21 by furnace temperature and empty, gas heating is adjusted Valve 13 effectively cooperates, it is ensured that the soaking zone of preheating section A, the bringing-up section of heating and thermal insulation section B and heating and thermal insulation section B are within the set range Stable or slight fluctuations;Heating and thermal insulation section B furnace temperature is set in 850 DEG C or more and air regenerative burner 5 and coal gas heat accumulating type is burnt Mouth 4 is disposed with the meaning of three aspects using asymmetric dislocation: (1) extending residence time of the flue gas in furnace, fill organic matter Divided combustion, reducing synthesis extremely toxic substance dioxin may;(2) so that flue gas is realized longitudinal flow in furnace, improve bundled scrap 3 Heat transfer effect;(3) the high-velocity combustion product that heat-accumulating burner sprays can raise a small amount of iron oxide and various dust particles not Opposite side can be inhaled into easily to be in the burner regenerative chamber of smoke evacuation state.Using the meaning of heat-accumulation combustion mode: (1) being disliked according to two English formation condition, the generation of dioxin when can effectively prevent discharging fume using heat storage type combustion mode, because 850 DEG C or so when smoke evacuation High-temperature flue gas quickly through being cooled to 120-150 DEG C in the heat storage 1s time, be similar to 850 DEG C of chillings of electric furnace steel making flue gas, Block the possibility of dioxin secondary synthesis;(2) 3 top of bundled scrap into furnace is made to be in 850 DEG C using heat storage type combustion mode The hot environment of left and right makes the organic matter of gasification fast decoupled under oxygen-enriched environment burn.It is commutated using coal gas two-bit triplet Valve 16 and air two-bit triplet reversal valve 17, only two groups of burner reversing combustions, the influence to furnace pressure are smaller when commutation;In preheating furnace The furnace roof of ontology 1 configures a set of furnace pressure and detects differential pressure transmitter 20, and installs smoke evacuation regulating valve 18, according to furnace pressure feedback letter Number, furnace pressure is automatically adjusted in real time.
In conclusion the environment-friendly and energy-efficient combustion apparatus and technique of mating bundled scrap preheating proposed by the present invention, high temperature Bleeder residual oxygen analytical instrument 19, real-time monitoring inner flue gas of the stove remaining oxygen guarantee residual oxygen ratio certain in flue gas, it is ensured that high temperature has Completely, furnace temperature detection thermocouple 21 and empty, gas heating regulating valve 13 effectively cooperate, it is ensured that preheating section A, add for machine object volatilization burning The bringing-up section of the hot soaking zone B and soaking zone of heating and thermal insulation section B is stable within the set range or slight fluctuations;Heating and thermal insulation section B Furnace temperature is set in 850 DEG C or more and air regenerative burner 5 and gas regenerative burner 4 using asymmetric dislocation arrangement, can prevent Only synthesize extremely toxic substance dioxin;Using coal gas two-bit triplet reversal valve 16 and air two-bit triplet reversal valve 17, when commutation only Two groups of burner reversing combustions, the influence to furnace pressure is smaller, installation furnace pressure detection differential pressure transmitter 20 and smoke evacuation regulating valve 18, root According to furnace pressure feedback signal, furnace pressure is automatically adjusted in real time, to guarantee the stability of burning;Integral combustion good stability, organic matter can Completely burned can prevent burning from generating violent in toxicity.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (9)

1. a kind of environment-friendly and energy-efficient combustion apparatus of mating bundled scrap preheating, including preheating furnace body (1) and preheating furnace trolley (2), it is characterised in that: the preheating furnace trolley (2) runs on the track of the interior setting of preheating furnace body (1), the preheating The mating combustion system of preheating furnace is equipped between furnace body (1) and preheating furnace trolley (2), stacking has steel scrap on preheating furnace trolley (2) Briquetting (3);The preheating furnace body (1) is divided into two sections, respectively preheating section A, heating and thermal insulation section B, preheating section A and heating and thermal insulation Preheating furnace body (1) both walls top of section B is equipped with gas regenerative burner (4), air regenerative burner (5) and point and burns Mouth (6);The first space gas heat-accumulating burner spout (7) of installation and space gas are horizontal in the preheating furnace body (1) of the preheating section A Burning gallery (8), space gas horizontal firing channel (8) make the horizontal flame of space gas burning, the preheating of heating and thermal insulation section B Second space gas heat-accumulating burner spout (9) and space gas inclination burning gallery (10) are installed, space gas inclines in furnace body (1) Oblique burning gallery (10) oblique flame when space gas is burnt;The mating combustion system of preheating furnace is by air side air inducing Machine (11), coal gas side air-introduced machine (12), sky, gas heating regulating valve (13), combustion blower (14), gas main (15), coal Gas two-bit triplet reversal valve (16) and air two-bit triplet reversal valve (17) are constituted as main body;The combustion blower (14) goes out Mouthful three, end air pipeline is correspondingly connected with after three air conditioning valve M empty, in gas heating regulating valve (13) and each sky Gas two-bit triplet reversal valve (17) connection, gas main (15) outlet end three gas piping are correspondingly connected with empty, gas heating tune It is connect after three gas regulator door M on section valve (13) with each coal gas two-bit triplet reversal valve (16), air side air-introduced machine (11) input end is connect by empty pipe with each air two-bit triplet reversal valve (17), coal gas side air-introduced machine (12) input end It is connect by soot pipe with each coal gas two-bit triplet reversal valve (16);The air side air-introduced machine (11) and each air two In the empty pipe that position three-way diverter valve (17) connects and coal gas side air-introduced machine (12) and each coal gas two-bit triplet reversal valve (16) smoke evacuation regulating valve (18) is mounted in the soot pipe connected.
2. a kind of environment-friendly and energy-efficient combustion apparatus of mating bundled scrap preheating as described in claim 1, it is characterised in that: institute Preheating furnace trolley (2) are stated using strip rectangular configuration.
3. a kind of environment-friendly and energy-efficient combustion apparatus of mating bundled scrap preheating as described in claim 1, it is characterised in that: institute The furnace roof of preheating furnace body (1) is all provided with where stating the soaking zone of preheating section A, the bringing-up section of heating and thermal insulation section B and heating and thermal insulation section B 1-2 set high temperature bleeder residual oxygen analytical instrument (19) is set, and configures a set of furnace pressure detection differential pressure transmitter (20), preheating section A, is added 6- is respectively arranged in the furnace roof of preheating furnace body (1) and furnace two sides where the bringing-up section of hot soaking zone B and the soaking zone of heating and thermal insulation section B 9 furnace temperature detect thermocouple (21), high temperature bleeder residual oxygen analytical instrument (19), furnace pressure detection differential pressure transmitter (20) and furnace temperature Detection thermocouple (21) is respectively positioned on the center line of preheating furnace body (1).
4. a kind of environment-friendly and energy-efficient combustion apparatus of mating bundled scrap preheating as described in claim 1, it is characterised in that: institute The furnace roof for stating preheating furnace body (1) is built using fully fibrous structure, and the side wall of preheating furnace body (1) uses high alumina brick masonry + thermal insulation material structure preheats the height between the furnace roof and bundled scrap (3) of furnace body (1) between 1.4m-1.8m.
5. a kind of environment-friendly and energy-efficient combustion apparatus of mating bundled scrap preheating as described in claim 1, it is characterised in that: institute State gas regenerative burner (4), air regenerative burner (5), the first space gas heat-accumulating burner spout (7) and the second space gas Heat-accumulating burner spout (9) is built using the composite construction of low cement pouring material in the setting position of preheating furnace body (1) side wall.
6. a kind of environment-friendly and energy-efficient combustion apparatus of mating bundled scrap preheating as described in claim 1, it is characterised in that: institute Bundled scrap (3) is stated according to the distributing mode stacking of setting on preheating furnace trolley (2).
7. a kind of environment-friendly and energy-efficient combustion apparatus of mating bundled scrap preheating as described in claim 1, it is characterised in that: institute State air regenerative burner (5) and gas regenerative burner (4) and use upper and lower fabricated structure, air regenerative burner (5) and Gas regenerative burner (4) is all made of asymmetric interlaced arrangement in the both walls of preheating furnace body (1).
8. a kind of environment-friendly and energy-efficient combustion apparatus of mating bundled scrap preheating as described in claim 1, it is characterised in that: institute The air-flow angle of cut for stating the first space gas heat-accumulating burner spout (7) of preheating section A is horizontal, and flame is in a horizontal state, the first empty coal The upper burner of gas heat-accumulating burner spout (7) is coal gas heat-accumulating burner, and lower burner is air heat-accumulating burner, heating and thermal insulation section B's The air-flow angle of cut of second space gas heat-accumulating burner spout (9) of the soaking zone of bringing-up section and heating and thermal insulation section B diagonally downward, sprays The gap of mouth corresponding bundled scrap (3), upper burner are air heat-accumulating burner, and lower burner is coal gas heat-accumulating burner.
9. a kind of environment-friendly and energy-efficient burning process of mating bundled scrap preheating as described in claim 1, it is characterised in that: packet Include following steps:
S1: by bundled scrap (3) according to the distributing mode stacking of setting on preheating furnace trolley (2), according to the discharging section of setting Trolley is played from preheating furnace charging one vehicle of endfeed simultaneously from discharge end one vehicle of discharging, realizes that circulation takes on material;
S2: lighting the air regenerative burner (5) and gas regenerative burner (4) of preheating section by igniter burner (6), to just entering The cold conditions bundled scrap (3) of furnace is heated, and to guarantee to stablize burning, flame is controlled in the top of bundled scrap (3), favorably In the full combustion of bundled scrap surface fugitive constituent, by preheating section Control for Kiln Temperature at 850-950 DEG C;
S3: heating and thermal insulation section B air regenerative burner (5) and gas regenerative burner (4), air regenerative burner (5) and The flame that gas regenerative burner (4) sprays passes through bundled scrap by the oblique high speed of space gas inclination burning gallery (10) (3) gap, the Control for Kiln Temperature of heating and thermal insulation section B make bundled scrap (3) surface temperature rise rapidly to 800- at 800-950 DEG C 850℃;
S4: after which after above-mentioned S3 heating, the temperature of bundled scrap (3) surface and certain depth basically reaches 800 DEG C or more, steel scrap The central temperature of briquetting (3) also between 250-400 DEG C when, control gas regenerative burner (4) reduce coal gas conveying, by temperature It is adjusted downward to 800-900 DEG C, and controls air regenerative burner (5) and reduces air delivery, furnace air coefficient of excess is reduced, makes furnace Interior formation pole weak oxide or reducing atmosphere reduce bundled scrap (3) oxidization burning loss.
CN201910182805.5A 2019-03-12 2019-03-12 A kind of the environment-friendly and energy-efficient combustion apparatus and technique of mating bundled scrap preheating Pending CN109798764A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111928481A (en) * 2020-08-11 2020-11-13 远大(湖南)再生燃油股份有限公司 Waste mineral oil multistage preheating device and implementation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111928481A (en) * 2020-08-11 2020-11-13 远大(湖南)再生燃油股份有限公司 Waste mineral oil multistage preheating device and implementation method thereof

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