CN213037796U

CN213037796U - Blast furnace top combustion type hot blast stove with annular steel structure burner

Info

Publication number: CN213037796U
Application number: CN202021859488.0U
Authority: CN
Inventors: 刘力铭; 孔庆瑜; 范文轩; 赵晓璐
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-04-23
Anticipated expiration: 2030-08-31

Abstract

The utility model relates to a blast furnace top combustion hot blast stove with an annular steel structure burner, which can effectively solve the problems of easy damage of a furnace body, large investment, short service life and low use efficiency, and the technical proposal of the solution is that the blast furnace top combustion hot blast stove with the annular steel structure burner comprises a furnace body, a base, a vault and a burner, wherein the lower part of the furnace body is vertically upwards arranged on the base, the burner is arranged at the upper part of the furnace body, the vault is arranged at the upper part of the burner, the burner and the furnace body are separated into a fire well and a heat storage chamber through a separation wall, the heat storage chamber is filled with heat storage checker bricks, and a hot blast branch pipe with one end extending out of the furnace body and the other end communicated with the fire well is arranged; a combustion chamber is formed between the vault and the combustor, a steel vault shell is arranged on the outer wall of the vault, and a steel furnace body shell is arranged on the outer wall of the furnace body; the utility model discloses simple structure, novel unique, easy construction, with low costs, long service life, the thermal efficiency is high, and is energy-concerving and environment-protective.

Description

Blast furnace top combustion type hot blast stove with annular steel structure burner

Technical Field

The utility model relates to a hot blast stove, in particular to a blast furnace top combustion type hot blast stove with an annular steel structure burner.

Background

The hot blast stove is a common device in industrial production, and is continuously improved and innovated in the technology along with the technological progress, and in spite of the currently used hot blast stove, two different stove type structures are provided, wherein one stove is a top combustion type hot blast stove (small vault) with a pre-combustion chamber arranged at the top of a combustion chamber, and the other stove is a top combustion type hot blast stove (large vault) with an annular burner arranged at the bottom of the combustion chamber. On the whole, some defects of the hot blast stove are inherent, and some defects are caused by design, materials and masonry, but the defects are summarized mainly as follows: 1) the pre-combustion chamber is damaged by deflagration (small vault), 2) the annular combustor is damaged by extrusion and air leakage (large vault), 3) the vault of the combustion chamber collapses (in common), 4) the checker brick is damaged by super enthalpy combustion (large vault is very large), 5) the accumulated slag of the combustion nozzle is burnt (large vault), 6) the high-temperature stress of the hot air outlet is damaged (in common), 7) and the investment is huge. Particularly, a gas and air loop of an annular combustor arranged below a vault is very easy to damage (mainly caused by material and masonry problems) under the action of thermal stress or structural stress, once the gas and air loop are damaged, the residual gas cannot be controlled after combustion is finished, effective purging cannot be carried out, the detonation phenomenon continues in the air filling stage of the hot blast stove until serious wall bricks of the hot blast stove fall down, the structure of the stove body is damaged, the service life of the stove body is greatly influenced, and even the hot blast stove is scrapped; therefore, for the hot blast stove, the structural design, the material selection, the structural masonry, the performance parameter selection and the like are very important, so that the reasonable improvement on the structure and the performance of the hot blast stove is imperative on the basis of practice.

SUMMERY OF THE UTILITY MODEL

In view of the above situation, in order to overcome the defects of the prior art, the utility model aims to provide a blast furnace top combustion type hot blast stove with an annular steel structure burner, which can effectively solve the problems of easy damage of the furnace body, large investment, short service life and low use efficiency.

The utility model provides a technical scheme that a blast furnace top burning hot blast stove with a ring-shaped steel structure burner comprises a furnace body, a base, a vault and a burner, wherein the lower part of the furnace body is vertically upwards arranged on the base, the burner is arranged on the upper part of the furnace body, the vault is arranged on the upper part of the burner, the burner and the furnace body are separated into a fire well and a heat storage chamber through a separation wall, the heat storage chamber is filled with heat storage body checker bricks, and a hot blast branch pipe with one end extending out of the furnace body and the other end communicated with the fire well is arranged on a well wall on the lower part of the; a combustion chamber is formed between the vault and the combustor, a steel vault shell is arranged on the outer wall of the vault, and a steel furnace body shell is arranged on the outer wall of the furnace body; the burner is an annular steel structure burner, an air ring and a gas steel pipe ring which are vertically arranged are wound outside a wall body of the burner, the outer side of the wall body of the burner is of a steel structure, the inner side of the wall body of the burner is of a refractory material masonry, the wall body of the burner is internally provided with an air channel and a gas channel which are vertically upward, the upper top surface of the burner is provided with a combustion chamber, and air nozzles communicated with the air channel and a gas nozzle communicated with the gas channel are alternately and uniformly distributed at intervals, the air ring is communicated with an air inlet pipe, the gas steel pipe ring is communicated with the gas inlet pipe, the air ring is communicated with the lower end of the air channel through an air short pipe, the upper end of the air channel is communicated with the air nozzle, the gas steel pipe ring is communicated with the lower end of the gas channel through a.

The utility model discloses simple structure, novel unique, easy construction, with low costs, long service life, the thermal efficiency is high, and is energy-concerving and environment-protective, and economy and social are showing.

Drawings

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

Fig. 2 is a front view of the burner of the present invention with a partial cross-section.

FIG. 3 is a top view of the air nozzle and the gas nozzle of the upper combustion chamber wall of the burner of the present invention.

Fig. 4 is a front view of another embodiment of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings.

As shown in fig. 1-3, the blast furnace top combustion hot-blast stove with the annular steel structure burner of the utility model comprises a furnace body, a base, a vault and a burner, wherein the lower part of the furnace body is vertically upwards arranged on the base 2, the burner is arranged on the upper part of the furnace body, the vault is arranged on the upper part of the burner, the burner and the furnace body are separated into a fire shaft 7 and a regenerator 11 through a partition wall 10, the regenerator 11 is filled with regenerator checker bricks, and a hot-blast branch pipe 9 with one end extending out of the furnace body and the other end communicated with the interior of the fire shaft is arranged on a well wall on the lower part of the fire shaft; a combustion chamber 8 is formed between the vault 4 and the combustor, a steel vault shell 4-1 is arranged on the outer wall of the vault 4, and a steel furnace body shell 1-1 is arranged on the outer wall of the furnace body; the burner is a burner with an annular steel structure, an air loop 3-3 and a gas steel pipe loop 3-2 which are arranged up and down are wound outside a burner wall 3-1, the outer side of the burner wall is of the steel structure, the inner side of the burner wall is of refractory material masonry, the inside of the burner wall 3-1 is respectively provided with an air channel 3-5 and a gas channel 3-8 which are vertically upward, the upper top surface of the burner is provided with a combustion chamber 8, and alternately provided with air nozzles 3-6 which are uniformly distributed and communicated with the air channel 3-5 and a gas nozzle 3-7 which is communicated with the gas channel 3-8, the air loop 3-3 is communicated with an air inlet pipe 3-9, the gas steel pipe loop 3-2 is communicated with an inlet pipe 3-10, the gas loop 3-3 is communicated with the lower end of the air channel 3-5 through an air short pipe 3-4, the upper end of the air channel 3-5 is communicated with the air nozzle 3-6, the gas steel pipe loop 3-2 is communicated with the lower end of the gas channel 3-8 through the gas short pipe 3-11, and the upper end of the gas channel 3-8 is communicated with the gas nozzle 3-7.

In order to ensure the use effect and the use convenience, a manhole 5 with a sealing cover is arranged at the upper part of the vault;

a flue gas or cold air chamber is arranged between the upper part of the base 2 and the lower part of the furnace body, and a flue gas or cold air outlet pipe 2-1 is arranged on the side wall of the flue gas or cold air chamber;

the fire well 7 is of a hollow steel pipe structure, the lower end part of the fire well is arranged on the well support 12, and a cavity between the well support and the base is filled with heat-resistant red bricks 6;

the gas steel pipe loop 3-2 is an annular hollow pipeline formed by welding steel plates, and the air loop 3-3 and the gas steel pipe loop 3-2 are tightly wound together.

Fig. 4 shows another embodiment of the present invention, which is different from the structure shown in fig. 1 only in the connection form of the dome and the burner, and is substantially the same in structure, and therefore, additional detailed description is not given.

The utility model discloses simple structure, novel unique is to the structural improvement of current hot-blast furnace, especially adopts the combustor of steel structure, and combustion efficiency is high, improves combustion strength, ensures that burning flame is stable, prevent that the burning from shaking, improve and optimize heat transfer effect, and then can promote the efficiency of hot-blast furnace, reinforcing load regulatory function, realize safe and stable operation to can also reach the target of fuel saving, saving investment, through using on the spot and calculating, reducible investment 20%. Based on reasonably applying materials and structures with strong thermal stability in the combustion chamber, the combustor and the regenerator, the service life of the hot blast stove is effectively prolonged by more than 1 time compared with the prior hot blast stove of the same type, the maintenance cost and the maintenance time are greatly reduced, the production efficiency is improved by more than 40 percent, and the hot blast stove is a great innovation on the prior hot blast stove of the same type and has remarkable economic and social benefits.

Claims

1. A blast furnace top burning hot blast stove with a ring-shaped steel structure burner comprises a furnace body, a base, a vault and a burner, and is characterized in that the lower part of the furnace body is vertically and upwards arranged on the base (2), the burner is arranged on the upper part of the furnace body, the vault is arranged on the upper part of the burner, the burner and the furnace body are separated into a fire well (7) and a heat storage chamber (11) through a separation wall (10), the heat storage chamber (11) is filled with heat storage body checker bricks, and a hot blast branch pipe (9) with one end extending out of the furnace body and the other end communicated with the fire well is arranged on a well wall on the lower part of the fire well (; a combustion chamber (8) is formed between the vault (4) and the combustor, a steel vault shell (4-1) is arranged on the outer wall of the vault (4), and a steel furnace body shell (1-1) is arranged on the outer wall of the furnace body; the burner is a burner with an annular steel structure, an air loop (3-3) and a gas steel pipe loop (3-2) which are arranged up and down are wound outside a burner wall body (3-1), the outer side of the burner wall body is of the steel structure, the inner side of the burner wall body is of a refractory material masonry air loop and the inner side of the burner wall body is of a refractory material masonry air loop (3-3), the inside of the burner wall body (3-1) is respectively provided with an air channel (3-5) and a gas channel (3-8) which are vertically upward, the upper top surface of the burner is provided with a combustion chamber (8), air nozzles (3-6) which are alternately and uniformly distributed and communicated with the air channel (3-5) and gas nozzles (3-7) which are communicated with the gas channel (3-8), the air loop (3-3) is communicated with an air inlet pipe (3-9), the gas steel pipe, the air loop (3-3) is communicated with the lower end of the air channel (3-5) through an air short pipe (3-4), the upper end of the air channel (3-5) is communicated with the air nozzle (3-6), the gas steel pipe loop (3-2) is communicated with the lower end of the gas channel (3-8) through a gas short pipe (3-11), and the upper end of the gas channel (3-8) is communicated with the gas nozzle (3-7).

2. The blast furnace top combustion stove with annular steel structure burner according to claim 1, characterized in that the upper part of the vault is provided with a manhole (5) with a sealing cover.

3. The blast furnace top combustion stove with the annular steel structure burner as claimed in claim 1, characterized in that a flue gas or cold air chamber is provided between the upper part of the base (2) and the lower part of the furnace body, and a flue gas or cold air outlet pipe (2-1) is provided on the side wall of the flue gas or cold air chamber.

4. The blast furnace top combustion stove with the burner of annular steel structure according to claim 1, characterized in that the fire well (7) is of hollow steel tube structure, the lower end part is mounted on the well support (12), and the cavity between the well support and the base is filled with heat-resistant red bricks (6).

5. The blast furnace top combustion stove with the annular steel structure burner as claimed in claim 1, wherein the gas steel pipe loop (3-2) is an annular hollow pipe welded by steel plates, and the air loop (3-3) and the gas steel pipe loop (3-2) are tightly wound together.