CN202181328U

CN202181328U - Novel non-oxidation-burner continuous annealing furnace

Info

Publication number: CN202181328U
Application number: CN2011202404571U
Authority: CN
Inventors: 耿凯; 倪志荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-09
Filing date: 2011-07-09
Publication date: 2012-04-04
Anticipated expiration: 2021-07-09

Abstract

The utility model discloses a novel non-oxidation-burner continuous annealing furnace, which comprises a heating segment of the novel continuous annealing furnace and non-oxidation burners, wherein a plurality of non-oxidation burners are uniformly arranged at the furnace top and on the furnace side wall of the heating segment, and the non-oxidation burners are composed of burning chambers. Premixing pipelines and smoke outlets are arranged on the burning chambers, air pipelines and gas pipelines are connected on the premixing pipelines, and porous media are filled in the burning chambers. Air and gas are premixed in the premixing pipelines and then enter the burning chambers for igniting and burning, the air excessive coefficient maintains less than 1, and the discharged smoke is directly sent into a hearth for heating band steel. The novel non-oxidation-burner continuous annealing furnace saves the radiant tube and protective gases in the traditional continuous annealing furnace, so that most part of steels are saved, the auxiliary equipment of the continuous annealing furnace is simplified, and the workload of operation staff is reduced; meanwhile the heating efficiency of steel coil and the use efficiency of energy source are increased.

Description

Novel non-oxidation burner continuous annealing furnace

Technical field

The utility model relates to a kind of heat treated technology of steel band, relates in particular to the burner that uses in a kind of continuous annealing technology of steel band.

Background technology

In recent years, along with the develop rapidly of China people economic construction, steel industry had been obtained the achievement that makes the world attract attention; Market constantly increases high-performance, high precision cold rolled sheet (like tame electroplax, auto sheet etc.) product demand, and in the former heat treatment step of these sheet materials, is main with bell-type annealing production mainly; This system exists shortcomings such as production efficiency is low, power consumption height, temperature uniformity difference; The requirement that makes some performances of heat treated steel plate not reach tame electroplax, auto sheet, its quality is compared with the flourishing country of world industry, still has a certain distance; So for a long time; The high-quality precision sheet of China partly also all adopts import sheet material, or substitutes with the sheet material of China's production, has reduced the quality of China's household electrical appliances and automobile.The present for this reason domestic continuous annealing furnace of developing makes steel plate heat-treat in the walking of lehre high speed, and continuous annealing furnace has been compared a series of characteristics with bell furnace: the ⑴ equipment manufacturing cost is low, and floor space is little; ⑵ the annealing cycle is short, and unit output is high, and heat utilization efficiency is high; ⑶ simple to operate, safeguards easily, is easy to realize the robotization of producing; ⑷ good product quality, surface-brightening, defective is few, and steel band is smooth easily; ⑸ pickling process in the middle of save has been eliminated the pollution of hydrochloric acid mist.Progressively developed in Chinese large-sized iron and steel enterprise at present.

Continuous annealing furnace is a most important equipment in the continuous annealing.Be divided into that preheating, heating, soaking, slow cooling, sudden strain of a muscle are cold, overaging, two cold, cold totally eight sections eventually.The band steel is heated to the annealing temperature that annealing process requires in heating zone according to different steel grades, rank.

At present; On the market in the continuous annealing furnace type of heating all adopt radiator tube heating; Because products of combustion does not directly contact with the strip; Avoided surperficial oxidation and decarburization effectively, simultaneously under protective atmosphere, to heat-treat the condition created, so radiator tube is heated as most important type of heating on the continuous annealing line.Radiator tube is distributed in the both sides of band steel, and high-temperature flue gas gets into radiator tube, with the heat transferred radiator tube; Through radiation steel band is heated then, because products of combustion does not directly contact with the strip, the heating of band steel mainly relies on radiative transfer; Only have a spot of heat to rely on natural convection to transmit, so heat transfer efficiency is not high, heating efficiency is low; And funnel temperature is high, and is low to energy utilization rate.And used radiator tube in a large number, and make steel using amount bigger, the high drawback of energy consumption has just appearred when using normal burner.In order to solve this two problems, be necessary to adopt a kind of interchanger that not only can improve ignition condition but also can improve whole heat exchange property.

The utility model content

In order to solve the defective that exists in the above-mentioned technology; The purpose of the utility model provides a kind of novel non-oxidation burner continuous annealing furnace; The non-oxidation burner that employing has premix technology replaces burners in prior, not only improves efficiency of combustion and has also improved ignition condition, and the heat transfer between high-temperature flue gas and the direct heat transfer of radiator tube and radiator tube and the coil of strip is reduced to the heat transfer between the direct and coil of strip of high-temperature flue gas; Therefore its heat exchange rate improves greatly, and the utilization ratio of fuel also improves greatly.

The technical scheme of the utility model is achieved in that

Novel non-oxidation burner continuous annealing furnace; The heating zone, the non-oxidation burner that comprise the new type of continuous lehre; It is characterized in that: the furnace roof of said heating zone and furnace sidewall are evenly arranged some non-oxidation burners; Described non-oxidation burner is made up of the combustion chamber, and described combustion chamber is provided with premix pipeline and exhanst gas outlet, is connected with airline and gas line on the described premix pipeline; Be respectively arranged with SV at described airline and gas line, in said combustion chamber, be full of how empty medium.

Described porous medium is a pottery.

The utility model compared with prior art has following advantage:

1. this continuous annealing furnace is reduced to high-temperature flue gas directly and the heat transfer between the coil of strip with the heat transfer between traditional high-temperature flue gas and the direct heat transfer of radiator tube and radiator tube and the coil of strip, so its heat exchange rate improves greatly, and the utilization ratio of fuel also improves greatly.Save radiator tube and shielding gas in traditional continuous annealing furnace, also just practiced thrift steel greatly, simplified the utility appliance of continuous annealing furnace, reduced operator's workload, improved the heating efficiency and the efficiency of energy utilization of coil of strip simultaneously.

2. adopt the non-oxidation burner have the premix technology, in the pre-mixing combustion, the contact area of fuel and oxygen than in the diffusion combustion greatly.The highly developed porous medium of hole has very big thermal capacity and heat exchange area, and thermal conductivity and thermal radiation capability are also much bigger than gas, is the heat catalysis that many better than gas, can realize the quick transmission of energy.

3. the porous medium that porosity is high is little to the gas flow resistance, on the flow direction of gas mixture, vertically lays porous medium, has significantly improved the whole heat exchange property of combustion chamber.

4. in the combustion chamber, new combustion gas that gets into and air mixture can be helped its burning by the heating of pyritous porous medium.

Description of drawings

Fig. 1 is the structural representation of the said novel non-oxidation burner continuous annealing furnace of the utility model;

Fig. 2 is the structural representation of non-oxidation burner among Fig. 1;

1. airline 2. gas lines 3. premix pipelines 4. combustion chambers 5. exhanst gas outlets, 6. SVs, 7. furnace roofs, 8. furnace sidewall, 9. non-oxidation burners 10. porous mediums.

Embodiment

Following examples are used to explain the utility model, but are not used for limiting the scope of the utility model, and all technical schemes that are equal to also belong to the category of the utility model, and the scope of patent protection of the utility model should be limited each item claim.

From Fig. 1 and Fig. 2, can find out; Novel non-oxidation burner continuous annealing furnace; Comprise heating zone, the non-oxidation burner 9 of new type of continuous lehre, it is characterized in that: the furnace roof 7 of said heating zone is evenly arranged some non-oxidation burners 9 with furnace sidewall 8, and described non-oxidation burner 9 is made up of combustion chamber 4; Described combustion chamber 4 is provided with premix pipeline 3 and exhanst gas outlet 5; Be connected with airline 1 and gas line 2 on the described premix pipeline 3, be respectively arranged with SV 6 with gas line 2, in said combustion chamber 1, be full of how empty medium 10 at described airline 1; Described porous medium 10 is a pottery.

In the course of the work, with the amount of SV 6 control fuel and air, the burning of fighting of combustion chamber 4 mid points is sent in air and combustion gas pre-mixing by a certain percentage in premix pipeline 3 afterwards, excess air factor is kept less than 1.The porous medium 10 that the utility model is filled is a pottery; When premixed gas burns in porous medium; The part heat of combustion reactions is heated the air of new entering and fuel gas mixture through heat conduction and reflux combustion gas of the upper reaches, radiation direction combustion zone and AIR MIXTURES after getting into the combustion chamber.In the process combustion, discharge heat, with porous medium 10 heating, excessive fuel and air form nonoxidizing high-temperature flue gas after in combustion chamber 4, burning, and through exhanst gas outlet 4, get in the continuous annealing furnace.

Claims

1. novel non-oxidation burner continuous annealing furnace; The heating zone, the non-oxidation burner ⑼ that comprise the new type of continuous lehre; It is characterized in that: the furnace roof ⑺ of said heating zone and furnace sidewall ⑻ evenly arrange some non-oxidation burner ⑼; Described non-oxidation burner ⑼ is made up of combustion chamber ⑷, and described combustion chamber ⑷ is provided with premix pipeline ⑶ and exhanst gas outlet ⑸, is connected with airline ⑴ and gas line ⑵ on the described premix pipeline ⑶; Be respectively arranged with SV ⑹ at described airline ⑴ and gas line ⑵, in said combustion chamber ⑴, be full of how empty medium ⑽.