CN210506408U

CN210506408U - High-efficiency energy-saving high-air-temperature hot blast stove

Info

Publication number: CN210506408U
Application number: CN201921042127.4U
Authority: CN
Inventors: 周战朝; 张德松; 郭立鹏
Original assignee: Zhengzhou Guangda Refractories Co ltd
Current assignee: Zhengzhou Guangda Refractories Co ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-05-12
Anticipated expiration: 2029-07-05

Abstract

The utility model relates to a high-efficiency energy-saving high-blast-temperature hot blast stove, which can effectively solve the problems of easy damage of a hot blast outlet and inconvenient maintenance, and adopts the technical proposal that the high-efficiency energy-saving high-blast-temperature hot blast stove comprises a stove body, wherein a gas distribution chamber is arranged at the bottom in the stove body, a flue gas outlet is arranged at one side in the gas distribution chamber, a cold air inlet is arranged at the other side, a stove post is arranged in the gas distribution chamber, a stove grate is arranged at the upper part of the gas distribution chamber above the stove post, a heat storage chamber is arranged in the stove body above the gas distribution chamber, a coincidence chamber is arranged in the stove body above the heat storage chamber, a combustion chamber is arranged in the stove body above the coincidence chamber, and a ceramic burner is arranged at the top of the combustion chamber, the upper wall body of the utility model reduces the pressure on the upper part of the, the combustion is completely equal to the environmental protection, and is an innovation on the hot blast stove.

Description

High-efficiency energy-saving high-air-temperature hot blast stove

Technical Field

The utility model relates to a hot blast stove, in particular to a high-efficiency energy-saving high-blast-temperature hot blast stove.

Background

Present hot-blast furnace combustion area and heat accumulation district independent setting, construction cost is high, mix inadequately, the combustion temperature is low, both extravagant coke use amount, a large amount of exhaust emission has been led to again, and the damage of current hot-blast furnace hot air outlet is the problem that is difficult to solve with the trade, the reason is under the high wind temperature high pressure state of being in for a long time, the displacement of wall body changes in addition, most hot-blast outlet can't reach the age of a generation stove, it sinks to fall the brick easily in the use, need all tear the part of pressing above during the maintenance down, the maintenance volume high cost is high, therefore, the improvement of hot-blast furnace is the problem that needs to solve at.

Disclosure of Invention

To the above situation, in order to solve the defects of the prior art, the utility model aims to provide a high-efficient high-temperature hot-blast stove, which can effectively solve the problems of easy damage of hot air outlet and inconvenient maintenance.

The utility model adopts the technical proposal that the furnace comprises a furnace body, a gas distribution chamber is arranged at the bottom in the furnace body, a flue gas outlet is arranged at one side in the gas distribution chamber, a cold air inlet is arranged at the other side, a furnace column is arranged in the gas distribution chamber, a grate is arranged and connected at the upper part of the gas distribution chamber above the furnace column, a regenerator is arranged in the furnace body above the gas distribution chamber, a coincidence chamber is arranged in the furnace body above the regenerator, a combustion chamber is arranged in the furnace body above the coincidence chamber, a ceramic burner is arranged at the top of the combustion chamber, the outer wall of the furnace body is welded by steel plates and comprises a cylindrical wall body, a conical wall body, a straight wall body and an arched wall body from bottom to top, the conical wall body and the cylindrical wall body are meshed and welded together in a step-shaped or curved-seam labyrinth shape, the straight wall body and the conical, the lower parts of the arched wall body, the straight section wall body and the conical wall body are respectively provided with a first supporting plate, a second supporting plate and a third supporting plate, the first supporting plate, the second supporting plate and the third supporting plate are welded with the outer wall of the furnace body, the combustion chamber is uniformly distributed in the arched wall body and provided with a plurality of air mixing chambers, the air mixing chambers are respectively communicated with an air loop and a coal gas loop, the air loop is communicated with an air inlet, the coal gas loop is communicated with a coal gas inlet, and the straight section wall body is provided with a hot air outlet.

The utility model discloses destroy old design theory, the gas that adopts partial misce bene can burn in heat exchange body (checker brick), very big combustion chamber space has been reduced, reduce the equipment investment cost to huge hot-blast furnace volume many, and reached the purpose that the heat price traded the time high wind temperature air supply, the hot air exitus wall body has independent support, the upper portion wall body reduces and alleviates the pressure to hot air exitus upper portion, the longer maintenance of life is more convenient, improve the air supply temperature of hot-blast furnace and just reduced the ton coke ratio of ironmaking, it is energy-conserving to reduce the coke ratio, the burning equals the environmental protection completely, be the innovation on the hot-blast furnace.

Drawings

Fig. 1 is a front view of the structure of the present invention.

Fig. 2 is a front view of the structure section of the present invention.

Fig. 3 is a front view of the cross section of the air mixing chamber structure of the present invention.

Fig. 4 is a sectional top view of the air mixing chamber structure of the present invention.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in figures 1-4, the utility model comprises a furnace body, a gas distribution chamber 2 is arranged at the bottom in the furnace body 8, a flue gas outlet 1 is arranged at one side in the gas distribution chamber 2, a cold air inlet 3 is arranged at the other side, a furnace column 18 is arranged in the gas distribution chamber 2, a grate 4 is arranged and connected at the upper part of the gas distribution chamber above the furnace column 18, a regenerator 5 is arranged in the furnace body above the gas distribution chamber 2, a coincidence chamber 9 is arranged in the furnace body above the regenerator 5, a combustion chamber 17 is arranged in the furnace body above the coincidence chamber 9, a ceramic burner is arranged at the top of the combustion chamber 17, the outer wall of the furnace body is made of steel plates by welding, and is composed of a cylindrical wall 16d, a conical wall 16c, a straight wall 16b and an arched wall 16a from bottom to top, the conical wall 16c and the cylindrical wall 16d are in a step-shaped or curved seam labyrinth-shaped interlock, the arched wall 16a and the straight wall 16b are meshed and welded together in a step-shaped or curved seam labyrinth shape, the lower parts of the arched wall 16a, the straight wall 16b and the conical wall 16c are respectively provided with a first supporting plate 7a, a second supporting plate 7b and a third supporting plate 7c, the first supporting plate 7a, the second supporting plate 7b and the third supporting plate 7c are welded together with the outer wall of the furnace body, the combustion chamber 17 is uniformly provided with a plurality of air mixing chambers 15 in the arched wall 16a, the air mixing chambers 15 are respectively communicated with an air loop 14a and a gas loop 14b, the air loop 14a is communicated with an air inlet 12, the gas loop 14b is communicated with a gas inlet 13, and the straight wall 16b is provided with a heat air outlet 10.

In order to ensure the using effect, the combustion chamber 17 is provided with a second maintenance hole 11 on the straight wall 16 b.

A first maintenance manhole 6 is arranged on the coincidence chamber 9, and the maintenance, peeking and temperature measurement are facilitated.

A heat accumulator 5a (refractory checker brick or refractory ball) for heat exchange is stacked on the grate 4.

The coincidence chamber 9 is internally provided with checker bricks with the aperture of phi 40mm or refractory balls with the diameter of more than Ø 70, effectively solves the problem of combustion space, fully burns and fully stores heat, the temperature of circulating gas is increased, energy is saved, the heat exchanger is strong under the same condition, emission is reduced, the air temperature is higher, the heat accumulator is more, and blockage can be prevented.

The checker bricks with the aperture of phi 25-30mm are arranged in the regenerative chamber.

The air mixing chamber is made of refractory material.

And a plurality of mixed gas nozzles 19 are arranged in the combustion chamber 17, and the mixed gas nozzles 19 are communicated with the air mixing chamber 15.

The utility model has the use condition that the lower part of the furnace body is provided with a gas distribution chamber, the chamber is internally provided with a flue gas outlet and a cold air inlet, the upper part of the gas distribution chamber is provided with a grate, the upper part of the grate is stacked with heat accumulators (refractory checker bricks or refractory balls) for heat exchange, the upper part straight section and the conical top use an independent supporting plate as a gravity support, the upper part straight section is provided with a maintenance manhole, the heat accumulators are built with general (traditional) refractory checker bricks or refractory balls, a coincidence chamber 9 (the straight section of a conical wall and a part of the conical top) is built with large-aperture (relative to the aperture of the heat accumulators) checker bricks or large-diameter refractory balls, a common space for combustion and heat accumulation is made, the upper part (the neck) of the conical top is provided with a straight wall body as a combustion area, the wall body is independently supported and provided with a hot air outlet and a manhole, an observation hole, the principle is that the smaller the volume of the mixing chamber is, the faster the mixing speed is, the more the mixing chambers are, the more the nozzles are, the faster the uniformly mixed gas is sprayed into the combustion chamber, the more complete the combustion is, the lower the CO content in the waste gas is, the best choice for reaching the national emission standard is, the hot air outlet is placed at the upper neck of the cone, the wall body of the hot air outlet (neck) is independently supported, the upper wall body reduces the pressure on the upper part of the hot air outlet, the service life is longer, the maintenance is more convenient, the construction cost can be reduced by arranging the coincidence chamber 9, the higher air temperature can be obtained by arranging the high temperature point of combustion in the checker brick, the air outlet 10 is placed at a high position, under the conditions of high temperature and high pressure, the pressure is small at the high position, and the service life is long, the labyrinth-like engagement of the curved slots divides the entire furnace into 3 major parts and serves to prevent the entire furnace from moving back and forth up and down during expansion.

The utility model is different from the position of the hot air outlet of the traditional (current) hot air furnace, only can overlap the combustion area and the heat accumulation area, thus improving the temperature of the hot air exchange and reducing the construction cost, adopting partial gas mixed uniformly to be combusted in the heat exchange body (checker brick), reducing the space of a large combustion chamber, reducing the volume of the huge hot air furnace to reduce the investment cost of equipment, adopting a method of small ball top short distance flame gas combustion, fully mixing the air and the gas before entering the combustion chamber, combusting the mixed gas part in the combustion chamber, combusting a high temperature area in the heat exchange body (checker brick), heating the heat exchange body (checker brick) to the upper limit of the combustion temperature, achieving the purpose of high air temperature air supply when heat price is changed, and the process technology is not adopted in the heat exchange process of the hot air furnace at present, the smelting industry adopts this scheme can save a large amount of coke use amount, has not only saved the energy but also reduced exhaust emission and has reached energy-conserving, the purpose of environmental protection, for the enterprise creates more profits, the utility model discloses a revolutionary change of iron-making trade must promote the big promotion of technique of iron-making trade in china.

The utility model discloses can provide the high wind temperature, its principle is that flame gas can obtain higher temperature in the material burning, for example lime kiln coal burns in the lime stone, sintering bauxite also is same reason, and the iron-making is also that the coke burns etc. in iron ore and acquires the high temperature, and coal gas and combustion-supporting phoenix burn in solid material, heat higher temperature with solid material, and flame gas burns in the material anyway can reach the highest temperature and save fuel again, adopts the utility model discloses blast furnace air supply wind temperature can reach more than 1250 ℃, and energy-concerving and environment-protective, excellent in use effect is the innovation on the hot-blast furnace, has good economy and social.

Claims

1. The utility model provides a high-efficient energy-saving high wind temperature hot-blast furnace, which comprises a furnace body, a serial communication port, bottom is provided with gas distribution room (2) in furnace body (8), one side is provided with exhanst gas outlet (1) in gas distribution room (2), the opposite side is provided with cold wind entry (3), be provided with column (18) in gas distribution room (2), be connected with grate (4) in gas distribution room upper portion erection joint above column (18), be equipped with regenerator (5) in the furnace body of gas distribution room (2) top, regenerator (5 a) are equipped with in the regenerator, be provided with coincidence room (9) in the furnace body of regenerator (5) top, be provided with combustion chamber (17) in the furnace body of coincidence room (9) top, ceramic burner is equipped with at combustion chamber (17) top, the furnace body outer wall is made by the steel sheet welding, from supreme cylindrical wall body (16d), toper, The coal gas burner comprises a straight-section wall body (16b) and an arched wall body (16a), a conical wall body (16c) and a cylindrical wall body (16d) are in step-shaped or curved seam labyrinth-shaped occlusion welding together, the straight-section wall body (16b) and the conical wall body (16c) are welded together, the arched wall body (16a) and the straight-section wall body (16b) are in step-shaped or curved seam labyrinth-shaped occlusion welding together, the arched wall body (16a), the straight-section wall body (16b) and the lower part of the conical wall body (16c) are respectively provided with a first supporting plate (7a), a second supporting plate (7b) and a third supporting plate (7c), the first supporting plate (7a), the second supporting plate (7b) and the third supporting plate (7c) are all welded together with an outer wall of a furnace body, a plurality of air mixing chambers (15) are uniformly distributed in the arched wall body (16a) of a combustion chamber (17), and the air mixing chambers (15) are respectively, the air loop (14a) is communicated with the air inlet (12), the gas loop (14b) is communicated with the gas inlet (13), and the straight wall (16b) is provided with a hot air outlet (10).

2. An energy efficient hot blast stove according to claim 1, characterized in that the combustion chamber (17) is provided with a second service manhole (11) in the straight wall (16 b).

3. An energy-efficient hot blast stove with high blast temperature according to claim 1, characterized in that the coincidence chamber (9) is provided with a first service manhole (6).

4. A high efficiency energy saving high blast temperature hot blast stove according to claim 1 wherein the grate (4) has heat exchanging refractory checker bricks or refractory balls stacked thereon.

5. The high-efficiency energy-saving high-blast-temperature hot-blast stove according to claim 1, characterized in that the coincidence chamber (9) is internally provided with checker bricks or refractory balls with the aperture of phi 40 mm.

6. An energy efficient hot blast stove with high blast temperature according to claim 1, characterized in that the heat accumulator (5 a) is a checker brick with a hole diameter of 25-30 mm.

7. The high efficiency energy saving high blast temperature hot blast stove according to claim 1, wherein the air mixing chamber is made of refractory material.

8. The high-efficiency energy-saving high-blast-temperature hot blast stove according to claim 1, characterized in that a plurality of mixed gas nozzles (19) are arranged in the combustion chamber (17), and the mixed gas nozzles (19) are communicated with the air mixing chamber (15).