CN211771404U - Blast furnace top pressure-equalizing gas recovery pipeline - Google Patents

Abstract

The utility model discloses a blast furnace roof pressure-equalizing gas recovery pipeline, including gas pipe, blow-off pipe, connecting pipe and fixed pipe, gas pipe fixed surface has the tripod, the welding has the bracing piece on the tripod, bracing piece top and fixed socle portion fixed connection, gas pipe one end is through first return bend and blow-off bottom intercommunication, blow-off top and connecting pipe one end intercommunication, the connecting pipe is located the top of fixed pipe, install first breather pipe and second breather pipe between connecting pipe and the fixed pipe in proper order, install first valve on the first breather pipe, install the second valve on the second breather pipe, fixed pipe one end is passed through second return bend and three-way check valve intercommunication. The utility model has the advantages of changing high-pressure coal gas into normal pressure, recycling most coal gas and reducing environmental pollution.

Description

Blast furnace top pressure-equalizing gas recovery pipeline

Technical Field

The utility model relates to the technical field of pressure-equalizing gas recovery, in particular to a pressure-equalizing gas recovery pipeline at the top of a blast furnace.

Background

The blast furnace uses steel plate as shell, refractory brick lining is built in the shell, iron ore, coke and flux for slag making are charged from the top of the furnace, and preheated air is blown in from the tuyere located at the lower part of the furnace along the periphery of the furnace. Carbon in the coke is burnt with oxygen blown into the air at high temperature to generate carbon monoxide and hydrogen, and oxygen in the iron ore is removed in the ascending process in the furnace, so that iron is obtained by reduction. The smelted molten iron is discharged from the iron notch. Unreduced impurities in the iron ore are combined with fluxes such as limestone to generate slag, and the slag is discharged from a slag hole. The generated gas is discharged from the top of the furnace.

After the blast furnace gas is discharged from the top of the furnace, the blast furnace gas contains a large amount of combustible gas, which wastes resources, has high noise in the discharge process, causes great pollution to the environment and deteriorates the atmospheric quality.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a blast furnace top voltage-sharing gas recovery pipeline possesses and changes high-pressure gas into the ordinary pressure, retrieves most coal gas, reduces the advantage to environmental pollution, has solved blast furnace gas from the furnace top discharge back, contains a large amount of combustible gas, and resources are wasted, and the emission process noise is big, causes great pollution to the environment, worsens the problem of atmospheric quality.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a blast furnace roof voltage-sharing gas recovery pipeline, includes gas pipe, diffuse pipe, connecting pipe and fixed pipe, gas pipe fixed surface has the tripod, the welding has the bracing piece on the tripod, bracing piece top and fixed socle portion fixed connection, gas pipe one end is through first return bend and diffuse pipe bottom intercommunication, diffuse pipe top and connecting pipe one end intercommunication, the connecting pipe is located the top of fixed pipe, install first breather pipe and second breather pipe between connecting pipe and the fixed pipe in proper order, install first valve on the first breather pipe, install the second valve on the second breather pipe.

Preferably, the upper end and the lower end of the first vent pipe are respectively fixed with the connecting pipe and the fixed pipe, and the first vent pipe is communicated with the connecting pipe and the fixed pipe.

Preferably, the upper end and the lower end of the second vent pipe are respectively fixed with the connecting pipe and the fixing pipe, and the second vent pipe is communicated with the connecting pipe and the fixing pipe.

Preferably, one end of the fixed pipe is communicated with the three-way check valve through a second elbow pipe.

Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model discloses a set up the connecting pipe, fixed pipe, first breather pipe, first valve, second breather pipe and second valve, reached and changed high-pressure gas into the ordinary pressure, retrieve most coal gas, reduce the effect to environmental pollution, the utility model discloses be provided with the connecting pipe, fixed pipe, first breather pipe, first valve, second breather pipe and second valve, the connecting pipe with diffuse the pipe intercommunication, fixed pipe passes through support column and tripod and is fixed with the coal gas pipe, first breather pipe and second breather pipe are located between connecting pipe and the fixed pipe, first breather pipe and second breather pipe respectively with connecting pipe and fixed pipe intercommunication, first valve is installed on first breather pipe, the second valve is installed on the second breather pipe. The gas pipe, the blow-off pipe, the connecting pipe and the fixed pipe constitute a gas blow-off stabilizing device, high-pressure gas discharged from a blast furnace enters the blow-off pipe through the gas pipe, the gas enters the connecting pipe through the blow-off pipe, the opening degree of the first valve and the second valve is controlled, the gas enters the fixed pipe through the first vent pipe and the second vent pipe from the connecting pipe, the gas passes through the first vent pipe and the second vent pipe in the process of passing through the first vent pipe and the second vent pipe, the gas quantity passing through the first vent pipe and the second vent pipe is stable under the control of the first valve and the second valve, the high-pressure gas is changed into normal-pressure gas which enters the fixed pipe, the normal-pressure gas enters a pressure-equalizing gas recovery pipeline which is communicated with the three-way check valve from the outside through the three-way check valve, the purpose of changing the high-pressure gas into.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

fig. 2 is an enlarged schematic view of the position a of the present invention.

In the figure: 1. a gas pipe; 2. a tripod; 3. a support bar; 4. a first bend pipe; 5. a diffusing pipe; 6. a connecting pipe; 7. a fixed tube; 8. a three-way check valve; 9. a second bend pipe; 10. a first vent pipe; 11. a first valve; 12. a second vent pipe; 13. a second valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" 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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; 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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to fig. 2, the present invention provides an embodiment: a pressure-equalizing gas recovery pipeline on the top of a blast furnace comprises a gas pipe 1, a diffusing pipe 5, a connecting pipe 6 and a fixing pipe 7, wherein the gas pipe 1, the diffusing pipe 5, the connecting pipe 6 and the fixing pipe 7 form a gas diffusing stabilizing device. The surface of the gas pipe 1 is fixed with a tripod 2, the tripod 2 is welded with a support rod 3, the top end of the support rod 3 is fixedly connected with the bottom of a fixed pipe 7, one end of the gas pipe 1 is communicated with the bottom end of a diffusing pipe 5 through a first bent pipe 4, the other end of the gas pipe 1 is communicated with a blast furnace gas outlet, and high-pressure gas discharged from the blast furnace enters the diffusing pipe 5 through the gas pipe 1. The top of the diffusing pipe 5 is communicated with one end of a connecting pipe 6, the connecting pipe 6 is positioned above the fixed pipe 7, and the coal gas enters the connecting pipe 6 through the diffusing pipe 5. A first vent pipe 10 and a second vent pipe 12 are sequentially arranged between the connecting pipe 6 and the fixed pipe 7, the upper end and the lower end of the first vent pipe 10 are respectively fixed with the connecting pipe 6 and the fixed pipe 7, the first vent pipe 10 is communicated with the connecting pipe 6 and the fixed pipe 7, a first valve 11 is arranged on the first vent pipe 10, the upper end and the lower end of the second vent pipe 12 are respectively fixed with the connecting pipe 6 and the fixed pipe 7, a second valve 13 is arranged on the second vent pipe 12 communicated with the connecting pipe 6 and the fixed pipe 7, the opening degree of the first valve 11 and the second valve 13 is controlled, gas enters the fixed pipe 7 from the connecting pipe 6 through the first vent pipe 10 and the second vent pipe 12, and the gas quantity passing through the first vent pipe 10 and the second vent pipe 12 is stable in the process of passing through the first vent pipe 10 and the second vent pipe 12 under the control of the first valve 11 and the second valve 13, the high pressure coal gas is changed into normal pressure coal gas and enters the fixed pipe 7. One end of the fixed pipe 7 is communicated with the three-way check valve 8 through the second elbow pipe 9, and the coal gas can be prevented from flowing back under the action of the three-way check valve 8 through the three-way check valve 8. The gas at normal pressure enters a pressure equalizing gas recovery pipeline which is communicated with the three-way check valve 8 from the outside through the three-way check valve 8, the high-pressure gas is changed into the normal pressure, most of the gas is recovered, and the environmental pollution is reduced.

The working principle is as follows: high-pressure coal gas discharged from a blast furnace enters a diffusing pipe 5 through a coal gas pipe 1, the coal gas enters a connecting pipe 6 through the diffusing pipe 5, the opening degree of a first valve 11 and a second valve 13 is controlled, the coal gas enters a fixed pipe 7 through a first vent pipe 10 and a second vent pipe 12 from the connecting pipe 6, the coal gas enters the fixed pipe 7 through the first vent pipe 10 and the second vent pipe 12 in the process of passing through the first vent pipe 10 and the second vent pipe 12, the amount of the coal gas passing through the first vent pipe 10 and the second vent pipe 12 is stable under the control of the first valve 11 and the second valve 13, the high-pressure coal gas is changed into normal-pressure coal gas, the normal-pressure coal gas enters a pressure-equalizing coal gas recovery pipeline which is communicated with a three-way check valve 8 from the outside through the three-way check.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (4)

1. The utility model provides a blast furnace roof voltage-sharing gas recovery pipeline, includes gas pipe (1), diffuses pipe (5), connecting pipe (6) and fixed pipe (7), its characterized in that: gas pipe (1) fixed surface has tripod (2), the welding has bracing piece (3) on tripod (2), bracing piece (3) top and fixed pipe (7) bottom fixed connection, gas pipe (1) one end is through first return bend (4) and diffuse pipe (5) bottom intercommunication, diffuse pipe (5) top and connecting pipe (6) one end intercommunication, connecting pipe (6) are located the top of fixed pipe (7), install first breather pipe (10) and second breather pipe (12) between connecting pipe (6) and fixed pipe (7) in proper order, install first valve (11) on first breather pipe (10), install second valve (13) on second breather pipe (12).

2. The blast furnace top pressure equalizing gas recovery pipeline according to claim 1, characterized in that: the upper end and the lower end of the first vent pipe (10) are respectively fixed with the connecting pipe (6) and the fixed pipe (7), and the first vent pipe (10) is communicated with the connecting pipe (6) and the fixed pipe (7).

3. The blast furnace top pressure equalizing gas recovery pipeline according to claim 1, characterized in that: the upper end and the lower end of the second vent pipe (12) are respectively fixed with the connecting pipe (6) and the fixed pipe (7), and the second vent pipe (12) is communicated with the connecting pipe (6) and the fixed pipe (7).

4. The blast furnace top pressure equalizing gas recovery pipeline according to claim 1, characterized in that: one end of the fixed pipe (7) is communicated with the three-way check valve (8) through a second bent pipe (9).

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