CN217781197U - Top combustion stove with catenary staggered upper-spraying upper-outlet - Google Patents

Abstract

The utility model relates to a suspension chain line is crisscross to be spouted upward and is exported the top combustion formula hot-blast furnace, can effectively solve the problem that current blast furnace top combustion formula hot-blast furnace hot-blast outlet damages easily and with high costs, and the technical scheme of its solution is, the furnace body top is provided with the vault, is provided with flue opening and cold wind mouth on the lateral wall of furnace body bottom, and flue opening and cold wind mouth top are provided with the grate in the furnace body, are provided with the regenerator in the furnace body of grate top, and regenerator upper portion is provided with the combustor on the furnace body, and the combustor comprises air conduit, gas conduit and premixing chamber, the utility model discloses effectively solve the problem that current blast furnace top hot-blast furnace hot-blast outlet damages easily, and can further improve combustion temperature, improve air supply temperature, reduce consumption, the life-span of extension hot-blast furnace is the innovation on the blast furnace top combustion formula hot-blast furnace.

Description

Top combustion hot blast stove with top spraying outlet on interlaced catenary

Technical Field

The utility model relates to a hot-blast furnace field, especially a catenary is crisscross to be spouted upward export top combustion formula hot-blast furnace.

Background

The hot air outlet of a blast furnace top combustion type hot blast stove is at the outlet of a straight section of the hot blast stove at all times and at all times, and is easy to damage due to the action of pressure (combustion period), tension (air supply period) and thermal expansion force; and the brick consumption at the outlet of the straight section of the hot blast stove is large, and the capital investment is increased.

In internal combustion, external combustion and top combustion hot blast stoves, it is currently accepted that top combustion hot blast stoves are the most economical in investment, the most uniform in heating and the most stable in structure. In the top-fired hot blast stove, there are two main types, one is the Karl hot blast stove represented by Kalujin hats, and the other is the Yuxing hot blast stove represented by Yuxing catenary large vaults. The burner of the Ka's hot blast stove is arranged on the wall of the small cap, the spraying port is divided into two layers, three layers and four layers due to the limitation of small diameter, and the coal gas and the air are respectively sprayed out in a rotational flow manner; the burner of the Yuxing hot blast stove is arranged at the lower part of a large arch crown of a catenary, and the arrangement of the spray outlets with large diameter is not limited, so that coal gas and air are respectively arranged along the outer circumference of an inner wall in a staggered manner, are sprayed upwards, and run upwards along the catenary to the top of the catenary to be folded and reversely downwards to form vortex. The coal gas and air of the Ka's hot blast stove are sprayed in layers, so that the mixing is poor, the combustion opening is large, and the long flame combustion belongs to the long flame combustion; the hot blast stove spray opening is limited by arrangement, so the power of the burner is low; the Ka's hot blast stove is sprayed by rotational flow, and due to the action of centrifugal force, the edge airflow is large when the flow rate is high, the edge airflow is small when the flow rate is low, and the airflow distribution is uneven. The Yuxing hot blast furnace gas and the air are respectively sprayed upwards in a staggered mode, but a premixing chamber is not arranged, the gas and the air are sprayed and then mixed, and the Yuxing hot blast furnace gas and the air are not subjected to short flame combustion; because the burner of the Yuxing hot blast stove is arranged at the lower part of the catenary large vault, and the coal gas and the air are respectively arranged along the outer circumference of the inner wall, the power of the burner is high; however, the amount of bricks is large, and the technical problems need to be solved to further improve the air temperature, reduce the consumption and prolong the service life of the hot blast stove, so the improvement of the blast furnace top combustion type hot blast stove is a problem which needs to be solved at present.

Disclosure of Invention

In view of the above situation, in order to overcome the drawbacks of the prior art, the present invention provides a catenary interlaced top-spraying top-burning hot-blast stove, which can effectively solve the problems of easy damage and high cost of the hot-blast outlet of the existing blast furnace top-burning hot-blast stove.

The utility model provides a technical scheme be, the induction cooker comprises a cooker bod, vault and regenerator, the furnace body top is provided with the vault, be provided with flue mouth and cold wind gap on the lateral wall of furnace body bottom, flue mouth and cold wind gap top are provided with the grate in the furnace body, be provided with the regenerator in the furnace body of grate top, regenerator upper portion is provided with the combustor on the furnace body, the combustor is by air conduit, gas pipeline and premixing chamber constitute, air conduit, gas conduit is 45 contained angles and intersects and be linked together with premixing chamber, be equipped with the nozzle that is linked together on premixing chamber, the nozzle communicates with each other with the furnace body is inside, the vault top is provided with hot air exitus, hot air exitus is linked together with hot-blast main.

The utility model discloses simple structure, the modern design is unique, and simple and practical, and is energy-concerving and environment-protective, and longe-lived, effectively solves the problem that current blast furnace roof combustion formula hot-blast furnace hot air outlet damaged easily, and can further improve combustion temperature, improves air supply temperature, reduces the consumption, prolongs the life-span of hot-blast furnace, is the innovation on the blast furnace roof combustion formula hot-blast furnace, has good economy and social.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the cross-sectional structure of the pre-mixing chamber of the present invention.

Fig. 3 isbase:Sub>A schematic sectional view taken along the linebase:Sub>A-base:Sub>A of fig. 2 according to the present invention.

Fig. 4 is a schematic sectional view taken along the direction B-B of fig. 2 according to the present invention.

Fig. 5 is a schematic view of the external pipe network platform of the present invention.

Detailed Description

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

Given by fig. 1-5, the utility model discloses a furnace body, vault and regenerator, furnace body 1 top is provided with vault 13, be provided with flue port 5 and cold wind mouth 6 on the lateral wall of furnace body 1 bottom, flue port 5 and cold wind mouth 6 top are provided with grate 2 in furnace body 1, be provided with regenerator 4 in the furnace body 1 of grate 2 top, regenerator 4 upper portion is provided with combustor 3 on furnace body 1, combustor 3 comprises air conduit 11, gas pipeline 12 and premixing chamber 10, air conduit 11, gas conduit 12 are 45 contained angles and intersect and are linked together with premixing chamber 10, premixing chamber 10 is equipped with the nozzle 14 that is linked together, nozzle 14 communicates with each other with furnace body 1 is inside, vault 13 tops are provided with hot air outlet 7, hot air outlet 7 is linked together with hot air duct 8.

In order to ensure the using effect, the arch 13 is a catenary arch.

The combustor 3 is an air and gas staggered upward-spraying combustor, the air and the gas are sprayed out in a crossed mode at 45 degrees respectively and enter the premixing chamber 10, the air and the gas are sprayed out upwards and combusted after being fully mixed, and combustion products ascend along a catenary to the top of the catenary and are folded and uniformly enter checker bricks of the regenerator 4 downwards.

The regenerative chamber 4, the arch crown 13, the burner 3 and the hot air outlet 7 are positioned on the same central axis.

The hot air pipeline 8 is provided with a hot air valve 9.

The inlet of the air pipeline 11 is provided with a first combustion valve 15, and the inlet of the gas pipeline 12 is provided with a second combustion valve 16. And a flue valve 17 is arranged on the flue port 5.

And a cold air valve 18 is arranged on the cold air port 6.

The utility model has the use condition that the furnace is burnt from a stuffy furnace: firstly, a first combustion valve 15 on an air inlet (combustion-supporting air) is opened slightly, then a second combustion valve 16 on a gas inlet is opened slightly, gas and air enter a premixing chamber (as shown in figure 2) along own channels, ignition and combustion are carried out, and then the air-coal ratio is adjusted to the optimal state; the combustion products are sprayed upwards, go upwards along the catenary to the vault and are folded reversely and then enter the regenerator 4 for heat exchange, and the heat is transferred to the checker bricks; the flue gas after heat exchange is discharged through a flue valve 17; when the vault temperature and the flue temperature rise to specified values, furnace replacement is carried out, and the furnace is changed from combustion to smoldering: closing a second combustion valve 16 on the coal gas inlet 12, and then closing a first combustion valve 15 and a flue valve 17 on an air inlet (combustion-supporting air) to enter a furnace-stuffy state; from furnace closing to air supply: and (3) pressurizing the furnace to the air supply pressure, opening the cold air valve 18 and the hot air valve 9, allowing the blast furnace cold air to enter the heat storage chamber 4 through the cold air valve 18 for heat exchange, transferring the heat stored in the checker bricks to the blast furnace air, and allowing the blast furnace air to be heated by cold air, and then sending the heated air into the blast furnace through the hot air pipe 8, the hot air valve 9 and the hot air pipe 9 along the hot air outlet 7 for smelting.

The utility model discloses simple structure, the modern design is unique, compares with prior art, has following advantage:

1. the combustion power is high, the air and the gas are uniformly mixed, the surplus coefficient is small, the difference between the air supply temperature and the vault temperature is small, the air temperature is high, and the nitrogen oxides are low;

2. the air gas is additionally provided with the premixing chamber, and is sprayed out to be combusted, so that short flame combustion is realized;

3. the hot air outlet, the regenerator, the catenary arch crown and the combustor are the same central shaft, so that the airflow is distributed more uniformly, the utilization rate of the checker bricks is improved, and the air temperature is improved;

4. the hot air outlet is arranged on the furnace shell of the vault, the expansion distance of the inner masonry is small, and the hot air outlet is not easy to damage;

5. the hot air outlet is arranged from the vault, so that the large-diameter height of the hot air furnace is reduced, and the investment of the hot air furnace can be reduced;

6. after the hot air outlet is out from the vault, the hot air pipeline of each hot air furnace is directly lowered to the height level of the surrounding pipe, although two hot air pipelines are added, a large frame can be eliminated, and the frame saves approximately half of steel.

It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention in any way, and those skilled in the art can make modifications or equivalent embodiments without departing from the scope of the present invention.

Claims (7)

1. The top combustion type hot blast stove is characterized in that the top of the stove body (1) is provided with a vault (13), the side wall of the bottom of the stove body (1) is provided with a flue opening (5) and a cold air opening (6), a grate (2) is arranged in the stove body (1) above the flue opening (5) and the cold air opening (6), the heat storage chamber (4) is arranged in the stove body (1) above the grate (2), the upper part of the heat storage chamber (4) is provided with a burner (3) on the stove body (1), the burner (3) is composed of an air pipeline (11), a gas pipeline (12) and a premixing chamber (10), the air pipeline (11) and the gas pipeline (12) are intersected at an included angle of 45 degrees and communicated with the premixing chamber (10), the premixing chamber (10) is provided with a communicated nozzle (14), the nozzle (14) is communicated with the interior of the stove body (1), the top of the vault (13) is provided with a hot air outlet (7), and the hot air outlet (7) is communicated with a pipeline (8).

2. The catenary staggered up-flow top-outlet top-firing stove according to claim 1, wherein the crown (13) is a catenary crown.

3. The catenary staggered up-flow outlet top-fired stove according to claim 1, wherein the regenerators (4), the dome (13), the burners (3) and the hot air outlet (7) are on the same central axis.

4. The catenary staggered up-flow outlet top-firing stove according to claim 1, wherein the hot-air ducts (8) are provided with hot-air valves (9).

5. The catenary staggered up-spray top-outlet top-combustion stove according to claim 1, wherein a first combustion valve (15) is arranged at the inlet of the air duct (11), and a second combustion valve (16) is arranged at the inlet of the gas duct (12).

6. The catenary staggered up-flow outlet top-firing stove according to claim 1, wherein a flue valve (17) is provided at the flue port (5).

7. The catenary staggered upward-spraying outlet top-firing stove according to claim 1, wherein a cold air valve (18) is arranged on the cold air port (6).

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