CN114136108A - Simple device and method for treating flue gas at charging hole at furnace top of side-blown furnace - Google Patents

Abstract

The invention discloses a simple device and a simple method for treating flue gas at a charging hole at the top of a side-blown furnace, belonging to the technical field of environmental protection treatment.A charging hole is positioned at the top surface of the furnace top, a feeding platform is positioned at one side of the charging hole and is higher than the top surface of the furnace top, and the device comprises a steel structure, dustproof cloth, an unorganized flue and an electric valve; the furnace roof top surface is located to steel construction one end, and the material loading bench is located to the other end, and dustproof cloth lays and forms a sealed canopy on the steel construction, and the charge door is located sealed canopy, and the unorganized flue is located the material loading bench and will be sealed the main smoke pipeline intercommunication of canopy and stove, and electric valve locates on the unorganized flue. The invention recycles the unorganized flue gas generated during the discontinuous feeding, furnace condition treatment and the like in the existing production process to the environmental protection system for treatment, realizes the standard reaching of the field post operation environment and promotes the sustainable development of the circular economy of enterprises.

Description

Simple device and method for treating flue gas at charging hole at furnace top of side-blown furnace

Technical Field

The invention relates to the technical field of environmental protection treatment, in particular to a simple device and a simple method for treating flue gas at a charging hole at the top of a side-blown converter.

Background

In recent years, resource recycling industry is gradually rising, and continuous improvement and development are carried out, particularly, the environment-friendly technology for recovering nonferrous metals from solid hazardous waste smelting is developed quickly, the solid hazardous waste smelting and recovering metals mainly adopt the side-blown furnace smelting technology, air enters the side-blown furnace to react with fuel and materials, and the side-blown furnace is not continuously fed, so that intermittent feeding operation is needed, but smoke gas is generated at the positions of a feeding port and an observation port at the top of the side-blown furnace to escape to a factory building and outdoors; in addition, some escaped smoke can be generated from the furnace at the position of a furnace top feeding hole when operations such as furnace top blanking, furnace ramming, material level balancing and the like are processed at a post, so that the pollution to the field environment is caused, and the development of the post personnel on the occupational health is not facilitated.

When the top post of the side blown furnace is operated at the position of a top feeding port at present, smoke in the furnace can escape from the position of the top feeding port, the furnace is fed for 20-30 times every day, and the feeding time is about 10min each time; the operation of manually treating the material level at the furnace mouth or slagging and the like is about 10 times per day, the treatment operation time is about 15min each time, and the smoke generated in the processes of the operation links is dissipated into the inside of a factory building, so that the operation environment of a site post is polluted to a certain extent, and the post occupational health development is not facilitated.

Because the unorganized dissipated flue gas is sometimes and sometimes not, the time is small, and personnel and equipment are in intermittent contact with the charging hole, the generated dissipated flue gas cannot be directly introduced into the environment-friendly flue gas treatment system; if the field is sealed, personnel operation and equipment operation cannot enter, production operation management is not facilitated, and the field always has a pollution phenomenon. Under the condition that the existing automation technology is not completely realized, the on-site unorganized flue gas at the charging hole of the kiln is necessary to be treated, and a flexible environment-friendly treatment device can be designed to solve the problem.

Disclosure of Invention

Aiming at the defects existing in the problems, the invention provides a simple device and a simple method for treating flue gas at a charging opening at the top of a side-blown furnace, wherein the charging opening is positioned at the top surface of the furnace top, a feeding platform is positioned at one side of the charging opening and is higher than the top surface of the furnace top, and the device comprises a steel structure, dustproof cloth, an unorganized flue and an electric valve;

wherein, steel construction one end is located the furnace roof top surface, the other end is located on the material loading bench, just dustproof cloth is laid form a sealed canopy on the steel construction, the charge door is located in the sealed canopy, the unorganized flue is located in the material loading bench and will the main smoke pipeline intercommunication of sealed canopy and furnace, electric valve locates on the unorganized flue.

Preferably, the steel structure comprises a plurality of arc-shaped steel pipes and a plurality of connecting steel pipes, one ends of the arc-shaped steel pipes are arranged on the top surface of the furnace top, the other ends of the arc-shaped steel pipes are arranged on the feeding table, the arc-shaped steel pipes are arranged at intervals in parallel, and the connecting steel pipes are arranged on the arc-shaped steel pipes at intervals in parallel and connect all the arc-shaped steel pipes;

wherein, the connecting steel pipe is parallel to the top surface of the furnace top.

Preferably, the dustproof cloth at the middle lower part of the sealed shed is provided with a sliding pull curtain, so that personnel and hoisting hopper materials can conveniently enter the dustproof cloth.

Preferably, the unorganized flue comprises a horizontal flue and an inclined flue, the horizontal flue is communicated with the sealing shed, and the inclined flue is communicated with the main flue and has an acute connecting angle;

wherein, the electric valve is arranged on the horizontal flue.

The invention also provides a method for treating the flue gas at the charging hole at the top of the side-blown converter, which comprises the following steps:

a sealing shed is built on the top surface of the furnace top, so that a charging hole is positioned in the sealing shed;

an unorganized flue is arranged on the feeding table and communicates the sealing shed with a main smoke pipeline of the furnace;

an electric valve is arranged on the unorganized flue;

when the material is to be fed or observed, the electric valve is opened firstly, and then the feeding port is opened;

after the smoke in the furnace escapes, the smoke is gradually collected by the negative pressure of the unorganized flue and enters the main smoke pipeline, and post personnel enter the sealed shed for operation;

after the operation is finished, the electric valve is closed after 5min after the personnel come out.

Compared with the prior art, the invention has the beneficial effects that:

the invention fundamentally solves the problem that the inorganization smoke dissipated in the furnace pollutes the environment when the operation such as charging treatment of the top post of the side-blown furnace, observation and the like is carried out; meanwhile, the post operation environment is improved, and the good occupational health of workers is guaranteed, so that the operation enthusiasm of the workers is promoted; the long-term diffused smoke in the factory is also improved, the load reduction production for environmental pollution is not needed, favorable conditions are created for ensuring continuous and stable production, and the production efficiency is improved; meanwhile, smoke dust, harmful gas and the like brought by the unorganized smoke are efficiently recovered, and the method makes a positive contribution to improving the comprehensive recovery rate.

Drawings

FIG. 1 is a structural diagram of a simple device for treating flue gas at a charging hole at the top of a side-blown converter;

FIG. 2 is a front view of the simple device for treating flue gas at the charging hole at the top of the side-blown converter.

Reference numerals

1. A feed inlet; 2. sealing the shed; 3. an unorganized flue; 4. a feeding table; 5. a furnace roof; 6. a steel structure; 7. a door curtain; 8. an electrically operated valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention is described in further detail below with reference to the accompanying drawing 1:

as shown in figure 1, the invention provides a simple device and a method for treating flue gas at a charging hole at the top of a side-blown converter, wherein the charging hole 1 is positioned at the top surface of a furnace top 5, a feeding platform 4 is positioned at one side of the charging hole 1 and is higher than the top surface of the furnace top 5, and the device comprises a steel structure 6, dustproof cloth, an unorganized flue 3 and an electric valve 8;

wherein, 5 top surfaces at furnace roof are located to 6 one ends of steel construction, and on material loading platform 4 was located to the other end, and dustproof cloth laid and form a sealed canopy 2 on 6 steel construction, and charge door 1 is located sealed canopy 2, and unorganized flue 3 locates in material loading platform 4 and will seal canopy 2 and the main smoke pipeline intercommunication of stove, and electric valve 8 locates on unorganized flue 3. Through above-mentioned structure, seal charge door 1 in this sealed canopy 2, when needs collect the flue gas, open electric valve 8, the negative pressure of the main smoke pipeline of stove makes sealed canopy 2 interior formation little negative pressure, so 1 apron of charge door opens the back, and the flue gas that escapes in the twinkling of an eye in the stove emits the loss in sealed canopy 2, introduces the loss flue gas to main smoke pipeline in gradually through unorganized flue 3 and carries out the environmental protection collection under the effect of little negative pressure and handle. After the flue gas is collected, the electric valve 8 is closed. In actual production, the frequency of a fan in the main smoke pipeline is adjusted according to the amount of unorganized smoke to control the smoke in the sealed shed 2.

Further, the steel structure 6 comprises a plurality of arc-shaped steel pipes and a plurality of connecting steel pipes, one ends of the arc-shaped steel pipes are arranged on the top surface of the furnace top 5, the other ends of the arc-shaped steel pipes are arranged on the feeding table 4, the arc-shaped steel pipes are arranged in parallel at intervals, and the connecting steel pipes are arranged on the arc-shaped steel pipes in parallel at intervals and connect all the arc-shaped steel pipes;

wherein the connecting steel pipe is parallel to the top surface of the furnace roof 5.

Specifically, a cross beam is installed at the top end of the side edge of the charging platform 4, an arc-shaped steel pipe is installed on the top surface of the furnace roof 5, the arc-shaped steel pipe is fixedly connected with the cross beam, arc-shaped connecting steel pipes are parallelly connected to the arc-shaped steel pipe at intervals, and the middle and the side surfaces of the steel structure 6 are arched to enlarge the closed space.

Furthermore, a sliding pull curtain is arranged on the dustproof cloth at the middle lower part of the sealed shed 2, so that personnel and hoisting hopper materials can conveniently enter the dustproof cloth.

Specifically, install the slip zip fastener additional on the dustproof cloth of lower part department in sealed canopy 2 for dustproof cloth forms door curtain 7 in the left and right sides, makes things convenient for personnel to pass in and out the operation.

In the embodiment, the unorganized flue 3 comprises a horizontal flue and an inclined flue, the horizontal flue is communicated with the sealing shed 2, and the inclined flue is communicated with the main flue pipeline and has an acute connection angle; wherein, the electric valve 8 is arranged on the horizontal flue. So set up, ensure that negative pressure takes out the unorganized flue gas.

The invention also provides a method for treating flue gas at a charging hole 1 of a furnace top 5 of a side-blown furnace, which comprises the following steps:

a sealing shed 2 is built on the top surface of the furnace roof 5, so that the charging hole 1 is positioned in the sealing shed 2;

an unorganized flue 3 is arranged on the feeding table 4, and the unorganized flue 3 communicates the sealing shed 2 with a main flue pipe of the furnace;

an electric valve 8 is arranged on the unorganized flue 3;

when the material is to be fed or observed, the electric valve 8 is firstly opened, and then the feeding port 1 is opened;

after the smoke in the furnace escapes, the smoke is gradually collected by the negative pressure of the unorganized flue 3 and enters the main smoke pipeline, and the post personnel enter the sealing shed 2 for operation;

after the operation is finished, the electric valve 8 is closed after 5min after the personnel come out.

Specifically, 50mm square steel is adopted at the top of a feeding platform 4 of the side-blown converter, a steel structure 6 frame with the length of 4m and the width of 1m is connected at the top, then the length of a steel pipe of DN30 is 3.5m, the left, middle and right positions of the steel structure 6 frame at the top are fixedly connected, the steel pipe is bent into an arc shape at the interval of 1.5m in parallel and is respectively connected to the ground of a furnace top 5 platform to form a support rod, and a round steel connecting rod with the phi of 10mm is pulled at the position of 1.6m in the middle of the three steel pipe support rods to be parallel to the furnace top 5 platform; laying sealed dustproof cloth on the top and two side surfaces of the sealed shed 2 to cover the sealed shed 2 at the furnace top 5 to form sealing, additionally arranging 2 pull rings on the left side and the right side of a parallel round steel connecting rod for hanging dustproof cloth door curtains 7, enabling the door curtains 7 on the two sides of the bottom to slide left and right to pull the door curtains 7, enabling the two door curtains 7 to be 1.6m high and 2m wide respectively, and enabling personnel or a charging hopper to enter the sealed shed 2; thus, the whole steel structure 6 frame and the dustproof cloth form sealing, and the leaked smoke gas can be ensured to be basically free of leakage;

in the sealing shed 2, 2 furnace top 5 feed inlets 1 with the length of 1200mm and the width of 500mm and 4 observation ports with the length of 400mm and the width of 200mm are arranged, the feed inlets 1 on the furnace top 5 are blocked and sealed by adopting bricks, and the observation ports are covered and sealed by adopting cover plates; because of the sealed canopy 2 in top forms trapezoidal negative pressure cover, make and produce the negative pressure condition in the sealed canopy 2, the electric valve 8 of the unorganized flue 3 of sealed canopy 2 top side is opened, and the flue gas in the stove escapes in the twinkling of an eye, collects the processing in taking out the unorganized flue 3 along with the negative pressure with the ease flue gas, consequently can form the atmosphere of main flue negative pressure in sealed canopy 2, including trapezoidal sealed cover, whole formation flue gas collection system can collect the unorganized flue gas that produces.

When a person is outside the sealing shed 2, firstly opening the electric valve 8 of DN300 on the unorganized flue 3, generating negative pressure of about 500Pa by a main smoke pipeline connected with the unorganized flue 3, then opening a port or opening a part of an observation port of a charging port 1 of a side-blown furnace top 5, so that smoke in the furnace gradually escapes upwards and escapes to the top of the sealing shed 2, the smoke enters the trapezoidal negative pressure sealing cover and is pumped away by the micro-negative pressure unorganized flue 3, the smoke cannot escape all the time because of the micro-negative pressure in the furnace, so that the smoke in the sealing shed 2 is continuously pumped into the unorganized flue 3, after the unorganized smoke in the sealing shed 2 is pumped out, the person opens a bottom sealing door curtain 7, enters the sealing shed 2 to operate such as furnace condition or the like, after the operation is finished, the person covers the charging port 1 and the cover plate of the observation port of the furnace top, and then leaves the sealing shed 2, the solenoid valve on the unorganized flue 3 is closed. When the amount of the unorganized flue gas is large, the frequency of an environment-friendly fan used by the main flue can be increased by about 5Hz in advance, the extraction amount of the unorganized flue 3 or the main flue can be flexibly adjusted according to the actual extraction speed or time of the flue gas in the sealed shed 2 in actual production, and the flue gas in the sealed shed 2 can be recovered and treated quickly and efficiently.

The invention has the advantages that: the invention is suitable for the treatment of the unorganized flue gas at the top of the smelting furnace of small and medium-sized enterprises, and has simple structure, convenient operation and lower investment cost; the problem of difficult treatment of the unorganized flue gas generated when the furnace condition is discontinuously produced and treated on the production site for many years is solved, and the increasingly strict requirements of national environmental protection management are met; also solves the problems that the unorganized smoke on the furnace top is diffused at the top of the factory and can not be dispersed after being dissipated and gathered, the site environment and facilities are polluted, and the pollution needs to be reduced when the pollution is seriousLow production load, and full load production after the unorganized flue gas is slowly dispersed; after the invention is implemented, the field environment is improved, the post personnel can keep an active working state under a good working environment, and the post personnel do not need to always carry the gas mask to hide in a remote place for rest, thereby realizing the professional health development of the post personnel. In addition, the unorganized flue gas can be automatically controlled and flexibly adjusted, the field environment meets the national whitening requirement index, and the content of the on-site sulfur dioxide flue gas is lower than 5mg/Nm³Within the scope, the method also plays a demonstration role in the same industry.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A simple device for treating flue gas at a charging hole at the top of a side-blown furnace is characterized by comprising a steel structure, dustproof cloth, an unorganized flue and an electric valve, wherein the charging hole is positioned at the top surface of the furnace top;

wherein, steel construction one end is located the furnace roof top surface, the other end is located on the material loading bench, just dustproof cloth is laid form a sealed canopy on the steel construction, the charge door is located in the sealed canopy, the unorganized flue is located in the material loading bench and will the main smoke pipeline intercommunication of sealed canopy and furnace, electric valve locates on the unorganized flue.

2. The simple device for treating the flue gas at the charging hole of the furnace top of the side-blown furnace according to claim 1, wherein the steel structure comprises a plurality of arc-shaped steel pipes and a plurality of connecting steel pipes, one ends of the arc-shaped steel pipes are arranged on the top surface of the furnace top, the other ends of the arc-shaped steel pipes are arranged on the charging platform, the arc-shaped steel pipes are arranged in parallel at intervals, and the connecting steel pipes are arranged on the arc-shaped steel pipes in parallel at intervals and connect all the arc-shaped steel pipes;

wherein, the connecting steel pipe is parallel to the top surface of the furnace top.

3. The simple device for treating the flue gas at the charging opening at the top of the side-blown furnace as claimed in claim 2, wherein a sliding curtain is arranged on the dustproof cloth at the middle lower part of the sealing shed, so that personnel and hoisting hopper materials can conveniently enter the simple device.

4. The simple device for treating the flue gas at the charging hole at the top of the side-blown converter according to claim 1, wherein the unorganized flue comprises a horizontal flue and an inclined flue, the horizontal flue is communicated with the sealing shed, and the inclined flue is communicated with the main flue pipeline and has an acute connecting angle;

wherein, the electric valve is arranged on the horizontal flue.

5. The method for treating the flue gas at the top feed opening of the side-blown converter according to any one of claims 1 to 4, which comprises the following steps:

a sealing shed is built on the top surface of the furnace top, so that a charging hole is positioned in the sealing shed;

an unorganized flue is arranged on the feeding table and communicates the sealing shed with a main smoke pipeline of the furnace;

an electric valve is arranged on the unorganized flue;

when the material is to be fed or observed, the electric valve is opened firstly, and then the feeding port is opened;

after the smoke in the furnace escapes, the smoke is gradually collected by the negative pressure of the unorganized flue and enters the main smoke pipeline, and post personnel enter the sealed shed for operation;

after the operation is finished, the electric valve is closed after 5min after the personnel come out.

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