Coal gas recovery device for blast furnace charging bucket

Abstract

The utility model discloses a blast furnace charging bucket gas recovery device which comprises a charging bucket, one side of the charging bucket is connected with a dust remover used for filtering gas through a pipeline, one side of the dust remover is connected with a high-pressure clean gas pipe network through a pressure equalizing pipe, and the surface of the high-pressure clean gas pipe network is connected with a low-pressure clean gas outer net through a first connecting pipe. The bottom of the high-pressure clean gas pipe network is connected with a first water tank, the bottom of the low-pressure clean gas outer network is connected with a second water tank, through connection between the multiple water tanks and the pipe network, it is ensured that gas can flow smoothly in the system, the problem of gas leakage is reduced, gas leakage is effectively prevented through the liquid seal principle of a U-shaped pipe, and the service life of the system is prolonged. And the joint of the bleeder and the second water tank is communicated with a low-pressure clean gas outer net through a third connecting pipe, and multiple pipelines work cooperatively, so that the gas can be fully collected and conveyed to a corresponding pipe network, and the gas recovery efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of coal gas recovery, specifically relates to a blast furnace charging pot coal gas recovery device. BACKGROUND

[0002] In the blast furnace production process of steel smelting, the development of blast furnace charging pot coal gas recovery technology is very important for energy saving and emission reduction and sustainable development of the steel industry, a large amount of coal gas is generated in the charging pot when the blast furnace is loaded, if these coal gas is directly discharged into the atmosphere, not only the energy is wasted, but also the environment is seriously polluted, the greenhouse effect is aggravated, the surrounding air quality is affected, and the health of residents is harmed, however, under the current situation of energy shortage and increasingly strict environmental protection requirements, the blast furnace charging pot coal gas is generally recovered and utilized.

[0003] At present, in the collection link of blast furnace charging pot coal gas, due to the complex pipeline layout and connection design, the sealing performance of some connection parts is poor, the sealing material and connection mode cannot meet the special working condition requirements of high pressure, high temperature and impurities of blast furnace coal gas, a large amount of coal gas leaks in the collection process, and moreover, these devices often lack effective control means for coal gas pressure, and in the pressure equalization and diffusion process, the pressure cannot be accurately adjusted, so that the internal pressure of the blast furnace fluctuates greatly, which affects the stable operation of the blast furnace, thereby reducing the coal gas recovery efficiency. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a blast furnace charging pot coal gas recovery device to solve the problems in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical scheme: a blast furnace charging pot coal gas recovery device, comprising:

[0006] The dust remover on one side of the charging pot is connected with a dust remover for filtering coal gas through a pipeline, the dust remover on one side is connected with a high-pressure clean coal gas pipe network through an equalizing pipe, the surface of the high-pressure clean coal gas pipe network is connected with a low-pressure clean coal gas external network through a first connecting pipe, the bottom of the high-pressure clean coal gas pipe network is connected with a first water tank, the bottom of the low-pressure clean coal gas external network is connected with a second water tank, and the equalizing pipe is connected with the second water tank through a diffusion pipe.

[0007] Preferably, the first water tank and the second water tank are connected through a second connecting pipe, and the second connecting pipe is arranged in a U shape.

[0008] Preferably, the connection between the diffusion pipe and the second water tank is connected with the low-pressure clean coal gas external network through a third connecting pipe.

[0009] Preferably, the first water tank, the second water tank and the second connecting pipe are all provided with a blowdown valve.

[0010] Preferably, the first control valve is arranged on the diffusion pipe, the second control valve is arranged on the equalizing pipe, the third control valve is arranged on the high-pressure clean gas pipe network, and the fourth control valve is arranged on the first connecting pipe.

[0011] Preferably, the fifth control valve is arranged on the second connecting pipe, the sixth control valve is arranged on the low-pressure clean gas external network, and the seventh control valve is arranged on the third connecting pipe.

[0012] Preferably, the first water tank is provided with a water supplement valve and an overflow valve.

[0013] Compared with the prior art, the device has the following beneficial effects:

[0014] (1) The device is connected among the material tank, the dust collector, the high-pressure clean gas pipe network, the low-pressure clean gas external network and the plurality of water tanks, so that the gas can flow smoothly in the system, the gas leakage caused by the pipeline layout and connection problems is reduced, the first water tank and the second water tank are connected through the U-shaped second connecting pipe, the liquid seal principle of the U-shaped pipe is utilized to effectively prevent the gas leakage and improve the completeness of the gas collection, the connection part between the diffusion pipe and the second water tank is connected with the low-pressure clean gas external network through the third connecting pipe, and the multiple pipelines work cooperatively, so that the gas can be fully collected and transported to the corresponding pipe network, thereby significantly improving the gas recovery efficiency.

[0015] (2) The device is provided with a plurality of control valves, during the equalizing and diffusion processes, the operator can accurately adjust the opening degrees of the valves according to the internal pressure change of the blast furnace, so as to realize the accurate control of the gas pressure, which effectively avoids the large fluctuation of the internal pressure of the blast furnace and guarantees the stable operation of the blast furnace. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The working flowchart of the device.

[0017] In the figure: 1, material tank; 2, dust collector; 3, equalizing pipe; 4, high-pressure clean gas pipe network; 5, first connecting pipe; 6, low-pressure clean gas external network; 7, first water tank; 8, second water tank; 9, diffusion pipe; 10, second connecting pipe; 11, third connecting pipe; 12, blowdown valve; 13, first control valve; 14, second control valve; 15, third control valve; 16, fourth control valve; 17, fifth control valve; 18, sixth control valve; 19, seventh control valve; 20, water supplement valve; 21, overflow valve. DETAILED DESCRIPTION

[0018] Clearly, the described embodiments are merely part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.

[0019] The utility model provides a kind of blast furnace tank coal gas recovery device as Figure 1 As shown in a kind of blast furnace tank coal gas recovery device, comprising:

[0020] Tank 1, the dust remover 2 for filtering coal gas is connected on one side of the tank 1 by pipeline, the high-pressure clean coal gas pipe network 4 is connected on one side of the dust remover 2 by the equalizing pipe 3, the low-pressure clean coal gas outer network 6 is connected on the surface of the high-pressure clean coal gas pipe network 4 by the first connecting pipe 5, the first water tank 7 is connected on the bottom of the high-pressure clean coal gas pipe network 4, the second water tank 8 is connected on the bottom of the low-pressure clean coal gas outer network 6, the equalizing pipe 3 is connected with the second water tank 8 by the diffusion pipe 9.

[0021] The first water tank 7 and the second water tank 8 are connected by the second connecting pipe 10, and the second connecting pipe 10 is U-shaped.

[0022] The diffusion pipe 9 is connected with the second water tank 8 by the third connecting pipe 11 and the low-pressure clean coal gas outer network 6.

[0023] The first water tank 7, the second water tank 8 and the second connecting pipe 10 bottom are each equipped with blowdown valve 12, and the blowdown valve 12 of the first water tank 7, the second water tank 8 and the second connecting pipe 10 bottom can be opened regularly, and the impurities and dirt accumulated in the tank and pipeline are discharged, to ensure the normal operation of water system.

[0024] The first control valve 13 is equipped on the diffusion pipe 9, the second control valve 14 is equipped on the equalizing pipe 3, the third control valve 15 is equipped on the high-pressure clean coal gas pipe network 4, and the fourth control valve 16 is equipped on the first connecting pipe 5.

[0025] The fifth control valve 17 is equipped on the second connecting pipe 10, the sixth control valve 18 is equipped on the low-pressure clean coal gas outer network 6, and the seventh control valve 19 is equipped on the third connecting pipe 11.

[0026] The first water tank 7 is provided with a water supplement valve 20 and an overflow valve 21, and the first water tank 7 needs to be supplemented with water in time after being drained through the drain valve 12, when the first water tank 7 is empty, other valves are closed, the water supplement valve 20 and the fifth control valve 17 are opened, and the first water tank 7 is supplemented with water, and the water in the first water tank 7 can enter the second water tank 8 through the second connecting pipe 10, so that the first water tank 7 and the second water tank 8 are supplemented with water, until the overflow valve 21 discharges water, indicating that the water has been filled.

[0027] The blast furnace tank gas recovery device, the gas generated when the tank 1 is fed first enters the dust collector 2, in the dust collector 2, the diffused gas is filtered to remove dust and impurities therein, and the pressure equalizing gas is purified by back flushing to ensure that the gas entering the subsequent pipe network is relatively clean, the purified gas flows to the high-pressure clean gas pipe network 4 through the pressure equalizing pipe 3, in the high-pressure clean gas pipe network 4, the gas can be transported to the low-pressure clean gas external network 6 through the first connecting pipe 5, realizing the recovery and utilization of the gas, and in the transportation process, the control valves on each pipe, such as the first control valve 13, the second control valve 14, the third control valve 15, the fourth control valve 16 and the like, are adjusted according to the internal pressure of the blast furnace and the gas transportation demand to ensure that the gas can flow according to the predetermined path and flow rate.

[0028] When the diffusing operation of the gas is needed, the first control valve 13 and the seventh control valve 19 are opened, the gas in the blast furnace is discharged through the diffusing pipe 9, and the top pressure of the furnace is lowered, and when the top pressure is lowered to 40kPa, the seventh control valve 19 is closed, and then the fourth control valve 16 and the fifth control valve 17 are opened, at this time, the water in the second water tank 8 is discharged under the action of the gas pressure, so that the second water tank 8 is empty, and the top pressure of the furnace is further lowered, and when the top pressure of the furnace is less than 10kPa, the diffusing process is completed, and the first control valve 13 and the fourth control valve 16 are closed, and in the diffusing process, the diffused gas is filtered through the dust collector 2 to prevent pollution of the environment, and the filtered gas can enter the tank 1 through the pipe to realize recovery and utilization;

[0029] Before the pressure equalizing operation, the third control valve 15 and the sixth control valve 18 are opened, so that the water in the first water tank 7 is discharged and empty, and then the fifth control valve 17 and the sixth control valve 18 are closed to create conditions for the gas entering the first water tank 7 during pressure equalization, the second control valve 14 is opened during pressure equalization, the gas in the high-pressure clean gas pipe network 4 enters the tank 1 through the external pipe under the action of the pressure difference, so that the pressure in the tank 1 and the pressure in the blast furnace are balanced, realizing the pressure equalization operation, after the pressure equalization is completed, the second control valve 14 and the third control valve 15 are closed, and the gas input is stopped, and in the pressure equalization process, the gas is back-flushed through the dust collector 2, which is helpful to clean the impurities accumulated in the dust collector 2.

[0030] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A blast furnace burden container coal gas recovery device characterized by, The utility model relates to a coal gas filtering device, including: The tank (1) one side is connected with dust remover (2) for filtering coal gas through pipeline, dust remover (2) one side is connected with high pressure clean coal gas pipe network (4) through pressure equalizing pipe (3), high pressure clean coal gas pipe network (4) surface is connected with low pressure clean coal gas outer network (6) through first connecting pipe (5), high pressure clean coal gas pipe network (4) bottom is connected with first water tank (7), low pressure clean coal gas outer network (6) bottom is connected with second water tank (8), pressure equalizing pipe (3) is connected with second water tank (8) through diffusion pipe (9).

2. A blast furnace vessel gas recovery apparatus according to claim 1, characterised in that: Second connecting pipe (10) is connected between first water tank (7) and second water tank (8), and second connecting pipe (10) is arranged in U shape.

3. A blast furnace vessel gas recovery apparatus according to claim 2, characterised in that: The connecting place of diffusion pipe (9) and second water tank (8) is connected with low pressure clean coal gas outer network (6) through third connecting pipe (11).

4. A blast furnace bell coal gas recovery device according to claim 2, characterized in that: First water tank (7), second water tank (8) and second connecting pipe (10) bottom are all equipped with blow-off valve (12).

5. A blast furnace vessel gas recovery apparatus according to claim 1, characterised in that: First control valve (13) is arranged on diffusion pipe (9), second control valve (14) is arranged on pressure equalizing pipe (3), third control valve (15) is arranged on high pressure clean coal gas pipe network (4), and fourth control valve (16) is arranged on first connecting pipe (5).

6. A blast furnace bell coal gas recovery device according to claim 3, characterized in that: Fifth control valve (17) is arranged on second connecting pipe (10), sixth control valve (18) is arranged on low pressure clean coal gas outer network (6), and seventh control valve (19) is arranged on third connecting pipe (11).

7. A blast furnace bell coal gas recovery device according to claim 1, characterized in that: Supplementing valve (20) and overflow valve (21) are arranged on first water tank (7).

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