Converter flue blowing coking fly ash system

Abstract

The utility model relates to the field of ferrous metallurgy, and provides a converter flue blowing coking fly ash system which comprises a feeding bin, a coal injection tank, a mixing ejector, a cyclone dust collector and a gas cabinet. By arranging the coal injection tank and the mixing ejector, pulverized coal is fed into the feeding bin and enters the coal injection tank, the pulverized coal is directly injected into the furnace by the coal injection tank, and the pulverized coal and conveyed gas are uniformly mixed by the mixing ejector, so that the combustion efficiency and the reducing capacity are improved, the combustion process in the furnace is optimized, the production efficiency is further improved, and the cost is further reduced; a spray gun, a movable smoke hood and an evaporation cooling flue are arranged, the spray gun sprays out air mixed with pulverized coal, coking fly ash is sprayed into the evaporation cooling flue and then is rapidly cracked, and main reactions comprise adsorbed water evaporation, organic matter pyrolysis, volatile component release, fixed carbon coking and coal gasification reaction with high-temperature converter gas; the cyclone dust collector and the electric dust collector are arranged, so that waste is recycled.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of steel metallurgy, concretely is a converter flue injection coking dust removal ash system. BACKGROUND

[0002] Converter steelmaking occupies the dominant position in the steelmaking process in our country, and its byproduct converter gas is an important secondary energy of steel enterprises, accounts for 80~90% of the total energy recovery amount of the whole steelmaking process, and can be used as an important fuel and raw material for steel enterprises metallurgical package baking, chemical products and gas power generation and other industrial production. Therefore, improving the quality and quantity of converter gas recovery is beneficial to increase the steelmaking benefit and effectively reduce the emission of greenhouse effect gas CO2, and has important significance for realizing the sustainable development of steel enterprises.

[0003] However, the current converter gas recovery in our country generally has the problems of low coal gas recovery rate, low CO content and high CO2 and O2 content in the recovered coal gas. At present, the purification and recovery of converter gas mainly adopts wet (OG method) and dry (LT method) recovery technology. The dry method has the advantages of high dust removal efficiency, no secondary pollution and sewage treatment problem, low energy consumption and small occupied area, but the explosion leakage in the coal gas recovery process is more prominent, which affects the recovery amount of the coal gas to a certain extent, and a large amount of water is consumed in the coal gasification process, and the investment is large. In the coal gas recovery process, the emission of greenhouse gas CO2 and the oxygen-free recovery of coal gas have not been solved, and the existence of a large amount of CO2 also affects the unit heat value of the coal gas and corrodes the equipment such as gas tank. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the utility model content is to provide a converter flue injection coking dust removal ash system to solve the problems raised in the above background technology.

[0005] In order to realize the above purpose, the utility model provides the following technical scheme: a converter flue injection coking dust removal ash system, comprising a feeding bin, a coal injection tank, a mixed injector, a cyclone dust collector and a gas tank, the lower part of the feeding bin is provided with the coal injection tank, the lower part of the coal injection tank is provided with the mixed injector, the right side of the coal injection tank is provided with a converter, the upper part of the converter is provided with a movable smoke hood, the right side of the movable smoke hood is provided with a spray tower, the right side of the spray tower is provided with a cyclone dust collector, the right side of the cyclone dust collector is provided with an electric dust collector, the right side of the electric dust collector is provided with an air extractor, the right side of the air extractor is provided with a gas analyzer, the right side of the gas analyzer is provided with a diffusion chimney, and the right side of the diffusion chimney is provided with a gas tank.

[0006] Preferably, the coal injection tank is fixedly connected with the feeding bin, and the mixed injector is connected with the coal injection tank through a pipeline.

[0007] Preferably, the right side of the mixed injector is connected with a spray gun through a pipeline, the spray gun is fixedly connected with a gasification cooling flue, the upper side of the converter is movably connected with a movable hood, the top of the movable hood is fixedly connected with one end of the gasification cooling flue, and the other end of the gasification cooling flue is fixedly connected with a spray tower.

[0008] Preferably, the cyclone dust collector is connected with the spray tower through a pipeline, the electric dust collector is connected with the cyclone dust collector through a pipeline, and the air draught fan is fixedly connected with the electric dust collector.

[0009] Preferably, the coal gas analyzer is threadedly connected with the air draught fan, the diffusion chimney is fixedly connected with the air draught fan, and the gas holder is connected with the diffusion chimney through a pipeline.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The utility model discloses a coal injection tank and mixed injector are set up, and the coal powder is put into the feeding bin and enters the coal injection tank, and the coal injection tank directly sprays and blows the fine coal powder into the furnace, and the mixed injector ensures that the coal powder and conveying gas are uniformly mixed, thereby improving the combustion efficiency and reducing capacity, optimizing the combustion process in the furnace, further improving the production efficiency and reducing the cost, through setting up the spray gun, movable hood and gasification cooling flue, the spray gun sprays the air mixed with the coal powder, and the coking dust is sprayed into the gasification cooling flue and rapidly cracked, main reactions include adsorbed water evaporation, organic matter pyrolysis, volatile release, fixed carbon coking and coal gasification reaction with high-temperature converter gas, which is the recycling of waste, through setting up the cyclone dust collector and electric dust collector, the cyclone dust collector separates the particulate pollutants in the dust-containing gas by the centrifugal force generated by the rotating airflow, removes the larger and heavier particles first, reduces the pressure of the electric dust collector, the electric dust collector makes the dust particles in the gas charged by the high-voltage direct-current electric field, and then under the action of the electric field force, the charged dust particles deposit on the dust collecting electrode, so that the separation of the gas and the dust is realized, and the combination of the two can realize higher total dust removal efficiency, the process is a new coal gas recovery process with high technical content, green environmental protection and technical innovation, completely solves the problems of low coal gas recovery, large CO2 emission and production safety, and is of great significance for steel enterprises to reduce carbon, save energy and reduce emissions, reduce cost and increase efficiency, reduce environmental pollution and promote steel production, and has wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the appearance structure schematic diagram of the utility model.

[0013] Figure 2 It is the spray gun, movable hood and gasification cooling flue cooperation schematic diagram of the utility model.

[0014] Figure 3The drawing shows the cooperation between the air extractor and the gas analyzer.

[0015] Figure 4 The utility model discloses a process flow schematic diagram.

[0016] In the drawing, 1 is a feeding bin, 2 is a coal injection tank, 3 is a mixed injector, 4 is a spray gun, 5 is a converter, 6 is a movable smoke hood, 7 is a vaporization cooling flue, 8 is a spray tower, 9 is a cyclone dust collector, 10 is an electric dust collector, 11 is an air extractor, 12 is a gas analyzer, 13 is a diffusion chimney, and 14 is a gas holder. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model will be further described in combination with the specific embodiments.

[0018] In the description of the utility model, it needs to be explained that the orientation or position relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end" and "the other end" is the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as a limitation on the utility model. Therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be understood broadly, for example, "connection" can be fixed connection, can be detachable connection, or integral connection; can be mechanical connection, can be electrical connection; can be direct connection, can be indirect connection through an intermediate medium, and can be the communication between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary skilled persons in the art without creative labor belong to the scope of protection of the utility model.

[0021] Please refer to Figures 1-4The utility model provides a kind of embodiment: a converter flue injection coking dust removal ash system, including charging bin 1, coal injection tank 2, mixed injector 3, cyclone 9 and gas holder 14, the lower portion of charging bin 1 is provided with coal injection tank 2, the lower portion of coal injection tank 2 is provided with mixed injector 3, the right side of coal injection tank 2 is provided with converter 5, the upper portion of converter 5 is provided with movable smoke hood 6, the right side of movable smoke hood 6 is provided with spray tower 8, the right side of spray tower 8 is provided with cyclone 9, the right side of cyclone 9 is provided with electric dust collector 10, the right side of electric dust collector 10 is provided with air draught fan 11, the right side of air draught fan 11 is provided with gas analyzer 12, the right side of gas analyzer 12 is provided with diffusion chimney 13, the right side of diffusion chimney 13 is provided with gas holder 14.

[0022] Specifically, coal injection tank 2 is fixedly connected with charging bin 1, mixed injector 3 is connected with coal injection tank 2 by pipeline, coal powder is put into charging bin 1 and enters coal injection tank 2, coal injection tank 2 directly injects and blows fine coal powder into the furnace, mixed injector 3 ensures that coal powder and conveying gas are uniformly mixed, so as to improve combustion efficiency and reducing capacity, optimize the combustion process in the furnace, and further improve production efficiency and reduce cost.

[0023] Specifically, mixed injector 3 is connected with spray gun 4 by pipeline on the right side, spray gun 4 is fixedly connected with vaporization cooling flue 7, movable smoke hood 6 is movably connected with converter 5 on the top, the top of movable smoke hood 6 is fixedly connected with one end of vaporization cooling flue 7, the other end of vaporization cooling flue 7 is fixedly connected with spray tower 8, spray gun 4 sprays air mixed with coal powder, coking dust removal ash is injected into vaporization cooling flue 7 and rapidly cracked, main reactions include adsorption water evaporation, organic matter pyrolysis, volatile release, fixed carbon coking, and gasification reaction with high-temperature converter 5 gas, which is a reuse of waste.

[0024] Specifically, cyclone 9 is connected with spray tower 8 by pipeline, electric dust collector 10 is connected with cyclone 9 by pipeline, air draught fan 11 is fixedly connected with electric dust collector 10, cyclone 9 separates particulate pollutants in dust-containing gas by centrifugal force generated by rotating airflow, removes larger and heavier particles first, reduces the pressure of electric dust collector 10, electric dust collector 10 charges dust particles in gas by high-voltage direct-current electric field, and then the charged dust particles are deposited on dust-collecting electrode under the action of electric field force, so as to realize separation of gas and dust, and higher total dust removal efficiency can be achieved by combination of the two.

[0025] Specifically, gas analyzer 12 is screw-connected with air draught fan 11, diffusion chimney 13 is fixedly connected with air draught fan 11, gas holder 14 is connected with diffusion chimney 13 by pipeline, and the regulated converter 5 gas after cooling and dust removal is stored in gas holder 14 after being detected qualified by gas analyzer 12.

[0026] Working principle: first, the coal powder into the feed bin 1 into the coal injection tank 2, coal injection tank 2 to the furnace directly injection of fine coal powder, mixed injector 3 to ensure uniform mixing of coal powder and conveying gas, thereby improving the combustion efficiency and reducing capacity, optimizing the combustion process in the furnace, further improve the production efficiency and reduce cost, then the spray gun 4 will be mixed with coal powder air injection, coking dust injection into the vaporization cooling flue 7 after rapid cracking, the main reaction includes adsorption water evaporation, pyrolysis of organic matter, release of volatile matter, coking of fixed carbon, with high temperature converter 5 coal gas gasification reaction, is the reuse of waste, spray tower 8 on the flue gas cooling, then the cyclone dust collector 9 uses the centrifugal force generated by the rotating gas flow, the particles in the dust-containing gas are separated out, first remove larger and heavier particles, reduce the pressure of the electric precipitator 10, electric precipitator 10 uses high-voltage direct-current electric field to make the dust particles in the gas charged, then under the action of electric field force, these charged dust particles are deposited on the dust collecting electrode, so as to realize the separation of gas and dust, the combination of the two can realize higher total dust removal efficiency, finally, the regulated converter 5 coal gas after cooling and dust removal is detected by the coal gas analyzer 12 and enters the coal gas tank 14 for storage after passing the detection.

[0027] The above-mentioned is only the embodiment of the present application, and the well-known specific structure and characteristics and other common knowledge in the scheme are not described in detail. For those skilled in the art, it is obvious that the present application is not limited to the details of the above-mentioned exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A system for injection of coking dust from a converter flue, comprising a feed bin (1), a coal injection tank (2), a mixing injector (3), a cyclone (9) and a gas holder (14), characterized in that: The lower part of the feeding bin (1) is provided with a coal injection tank (2), the lower part of the coal injection tank (2) is provided with a mixing injector (3), the right side of the coal injection tank (2) is provided with a converter (5), the upper part of the converter (5) is provided with a movable smoke hood (6), the right side of the movable smoke hood (6) is provided with a spray tower (8), the right side of the spray tower (8) is provided with a cyclone dust collector (9), the right side of the cyclone dust collector (9) is provided with an electric dust collector (10), the right side of the electric dust collector (10) is provided with an air extractor (11), the right side of the air extractor (11) is provided with a coal gas analyzer (12), the right side of the coal gas analyzer (12) is provided with a diffusion chimney (13), and the right side of the diffusion chimney (13) is provided with a coal gas tank (14).

2. A system for injection of coking dust into the flue of a converter according to claim 1, characterized in that: The coal injection tank (2) is fixedly connected with the feeding bin (1), and the mixing injector (3) is connected with the coal injection tank (2) in a pipeline manner.

3. A system for injection of coking dust into the flue of a converter as claimed in claim 1, characterized in that: The right side of the mixing injector (3) is connected with a spray gun (4) through a pipeline, the spray gun (4) is fixedly connected with a vaporization cooling flue (7), the upper part of the converter (5) is movably connected with the movable smoke hood (6), the top of the movable smoke hood (6) is fixedly connected with one end of the vaporization cooling flue (7), and the other end of the vaporization cooling flue (7) is fixedly connected with the spray tower (8).

4. A system for injection of coking dust into the flue of a converter as claimed in claim 1, characterized in that: The cyclone dust collector (9) is connected with the spray tower (8) in a pipeline manner, the electric dust collector (10) is connected with the cyclone dust collector (9) in a pipeline manner, and the air extractor (11) is fixedly connected with the electric dust collector (10).

5. A system for injection of coking dust into the flue of a converter as claimed in claim 1, characterized in that: The coal gas analyzer (12) is screwedly connected with the air extractor (11), the diffusion chimney (13) is fixedly connected with the air extractor (11), and the coal gas tank (14) is connected with the diffusion chimney (13) in a pipeline manner.

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