CN2920484Y

CN2920484Y - Steel melting pouring basket high efficiency energy saving roaster

Info

Publication number: CN2920484Y
Application number: CN 200620097744
Authority: CN
Inventors: 肖飞
Original assignee: WUHAN CITY ZHIXIN MATERIALS CO Ltd
Current assignee: WUHAN CITY ZHIXIN MATERIALS CO Ltd
Priority date: 2006-07-13
Filing date: 2006-07-13
Publication date: 2007-07-11
Anticipated expiration: 2016-07-13

Abstract

The utility model is a steel melting pouring basket high efficiency energy saving roaster, belonging to the steel-making equipment field; the roaster includes a packet body of the middle packet, a packet cover, a burner combination, a reversing valve, a heat retainer and a control device; each burner of the burner combination is composed of a gas burner and two heat exchanging burners; the reversing valve is a four-position triple valve; the burner combination is embedded in the packet cover; the gas pipe is connected with the gas burner; the air pipe and the smoke pipe are communicated with the two heat exchanging burners respectively through the reversing valve and the heat retainer. The design not only structurally realizes the mixing and burning of the gas and the combustion air outside the burner with no outer discharging of the combustion flame in the middle packet, but also realizes that the radiation of the combustion flame is uniform; the temperature difference in the packet is less than 20 centigrade; in addition, the utility model makes full use of the high-temperature left heat of the smoke after the combustion, improving the utilization efficiency of the gas; the roistering speed is quick, and the device can save more than 50 percent compared with the traditional roaster; in addition, the utility model reduces the pollutant emission to the greatest extent, which is beneficial to the air and the environment.

Description

The energy-efficient roaster of steel-making tundish

Technical field

The energy-efficient roaster of the utility model steel-making tundish belongs to the steelmaking equipment field, is specifically related to the steel ladle heater.

Background technology

Tundish is a molten steel transition jar between ladle and the conticaster in the STEELMAKING PRODUCTION line, is commonly called as tundish, is characterized in that tank body is elongated, the space is narrow.Its been provided with internal refractories must be dried to more than 1100 ℃ before using, the combustion air of tradition ladle dryer is to mix in burner with coal gas, when flame sprays from burner, lift upwards is very big, be difficult to press down enter in the tundish and heat, a large amount of heat energy distribute in the bag external space, and to the cured effect extreme difference in the tundish bag.Therefore, stoving time is long, and the coal gas waste is very big.For example, by prior art, for 110 tons of production lines, its stoving time needs per hour to consume coal gas at 800m more than 10 hours ³About, the coal gas waste is very big, and utilization rate is less than 20%.Therefore, innovation tundish roaster structure improves tundish baking efficient, saves the energy, becomes the problem of generally being concerned about in the industry.

The utility model content

The purpose of this utility model provides the energy-efficient roaster of a kind of steel-making tundish, the coal gas and the combustion air that are provided respectively by coal gas burner and heat exchange burner are provided, and mixed combustion in the tundish narrow space outside nozzle is to solve the problem that combustion flame rushes down outward, in addition, adopt heat storage, store the high temperature heat of the combustion product gases of discharging, supply the usefulness of the preheating of heating of combustion air, improve the combustion gas service efficiency, save the energy, reduce and pollute, favorable environment.

The purpose of this utility model is achieved through the following technical solutions:

The energy-efficient roaster of the utility model steel-making tundish comprises tundish inclusion, clad, the combination of burner group, reversal valve, heat storage and control system, each burner group of burner group combination is by a coal gas burner 1 and two heat exchange burners 2, and promptly heat exchange burner 2A and heat exchange burner 2B form; Each burner group has two corresponding heat storages 3, i.e. heat storage 3A and heat storage 3B; Reversal valve 4 is four position three-way valves; Coal gas burner 1 is connected with gas pipe 6, two heat exchange burner 2A and corresponding with two the respectively heat storage 3 of 2B, be that heat storage 3A is connected with heat storage 3B, one docking port of reversal valve 4 is connected with fume pipe 8 with air hose 7 respectively, another docking port is connected with heat storage 3B with heat storage 3A respectively, air and flue gas are respectively through air hose 7 and fume pipe 8, reversal valve 4, heat storage 3A and heat storage 3B are communicated with heat exchange burner 2A and heat exchange burner 2B, burner component cloth is inlaid in the clad 5, clad 5 cooperates with the bag mouth appropriateness distance of middle inclusion 9, its each burner outlet constitutes one tundish roaster all towards the tundish inner space.

Above-mentioned heat exchange burner 2 and heat storage 3 are made up of steel casing 10 and high strength refractory material liner 11, are combined type or fixed the connection between heat exchange burner 2 and the heat storage 3.

The utility model is combined into combustion gas and combustion air mixed combustion structure outside burner by the coal gas burner and the combustion air burner of independent split, make combustion gas and air leave burner after, in tundish, mix, burning, and be the diffusion flame situation.

Pass through control device, by the hot-air of a heat exchange burner feeding through corresponding heat storage preheating, and and the coal gas that feeds by coal gas burner, mix, burn in the tundish outside burner, its combustion product gases, is discharged through flue from reversal valve flue gas mouth after corresponding heat storage accumulation of heat, cooling from another heat exchange burner.The utility model design is by in the tundish outside compound burner, finish the mixed combustion of coal gas and preheated air, switch by reversal valve, in two heat exchange burners, alternately by turns feed by the high temperature air of heat storage preheating and the high-temperature flue gas after sending burning, the heat energy of the high-temperature flue gas after the burning, storing in corresponding heat storage, usefulness for the combustion air preheating that feeds in succession, general air can be preheated to 1000 ℃ behind this heat storage, the high-temperature flue-gas after the heat storage accumulation of heat can be brought down below 100 ℃.

Thus, make coal gas and preheated air in tundish, mix, burn effectively, avoided flame to rush down outward, improve flame diversity and baking uniformity, and made full use of the high-temperature residual heat of burning back flue gas, improve the combustion gas service efficiency, accelerate baking speed, saved the energy.Reached the purpose of this utility model.

The utility model obvious technical effects, the design, not only realize that from structure combustion gas and combustion air mix, burn outside burner, combustion flame does not rush down outside having in tundish, fundamentally having overcome combustion gas and the combustion air that conventional roaster follows mixes in burner, burns, the technical barrier that makes combustion flame be difficult to press down in long and narrow tundish space.And combustion flame is dispersed evenly, can be full of whole tundish, upper and lower temperature difference in the bag＜20 ℃, the baking good uniformity has made full use of the high-temperature residual heat of flue gas after the burning in addition, improve the combustion gas service efficiency, fast baking, its stoving time is about the 1/3-1/5 of conventional roaster, good energy-conserving effect, more energy-conservation more than 50%, in addition than conventional roaster, environment protecting is good, and discharged nitrous oxides is few, and waste gas, waste heat discharge are few, reduced pollutant emission to greatest extent, favourable atmosphere, favorable environment.

Description of drawings

Fig. 1 the utility model apparatus structure schematic perspective view

Fig. 2 the utility model device heat exchange burner and heat storage body structure schematic diagram

The specific embodiment

Now in conjunction with the accompanying drawings, be example with the tundish that a burner group is set, further specify the utility model and how to implement:

According to the reversal valve commutation cycle of having set, for example the commutation cycle is 30 seconds, control device for opening, in 0-30 cycle second, the air of air blast air-supply enters heat storage 3A from air hose 7 through the corresponding inlet of reversal valve 4, air is heated to about 800-1000 ℃ in heat storage 3A after, enter heat exchange burner 2A, simultaneously, coal gas enters coal gas burner 1 through gas pipe 8, from the preheating high temperature air of heat exchange burner 2A with from the coal gas of coal gas burner 1, in the tundish outside burner, mix, burning, the high-temperature flue gas of its burning, 2B enters heat storage 3B by the heat exchange burner, and heat storage 3B itself is heated to about 1000 ℃ by high-temperature flue gas, flue-gas temperature is reduced to below 150 ℃, and the flue gas after the cooling is discharged by air-introduced machine from the corresponding flue gas mouth of pipe through reversal valve 4; In subsequent 30-60 second, the air of air blast air-supply enters heat storage 3B from air hose 7 through the corresponding inlet of reversal valve 4, air is heated to about 800-1000 ℃ in heat storage 3A after, enter heat exchange burner 2B, simultaneously, coal gas enters coal gas burner 1 through gas pipe 8, from the preheating high temperature air of heat exchange burner 2B with from the coal gas of coal gas burner 1, in the tundish outside burner, mix, burning, the high-temperature flue gas of its burning, 2A enters heat storage 3A by the heat exchange burner, heat storage 3A itself is heated to about 1000 ℃ by high-temperature flue gas, and flue-gas temperature is reduced to below 150 ℃, and the flue gas after the cooling is discharged by air-introduced machine from the corresponding flue gas mouth of pipe through reversal valve 4.

According to above-mentioned, by commutator 4, heat storage 3A and 3B be alternately accumulation of heat and heat release periodically, and heat exchange burner 2A and 2B periodically alternately send into hot-air and send combustion product gases from tundish to tundish, and above workflow periodically repeats.

Claims

1, the energy-efficient roaster of steel-making tundish, the tundish inclusion, clad, the combination of burner group, reversal valve, heat storage and gas pipe, air hose, fume pipe and control device, each the burner group that it is characterized in that the combination of burner group is by a coal gas burner (1) and two heat exchange burners (2), be that heat exchange burner (2A) and heat exchange burner (2B) are formed, coal gas burner (1) is connected with gas pipe (6), two heat exchange burners (2A) and (2B) respectively with two corresponding heat storages (3), be that heat storage (3A) is connected with heat storage (3B), one docking port of reversal valve (4) is connected with fume pipe (8) with air hose (7) respectively, another docking port is connected with heat storage (3B) with heat storage (3A) respectively, burner component cloth is inlaid in the clad (5), clad (5) cooperates with the bag mouth appropriateness distance of middle inclusion (9), constitutes one tundish roaster.

2, according to the energy-efficient roaster of steel-making tundish of claim 1, it is characterized in that described heat exchange burner (2) and heat storage (3) be made up of steel casing (10) and high strength refractory material liner (11), be combined type or fixed the connection between heat exchange burner (2) and the heat storage (3).