CN213012939U

CN213012939U - Silencing and dust-removing device for blast furnace diffusion

Info

Publication number: CN213012939U
Application number: CN202021802594.5U
Authority: CN
Inventors: 喻中孚
Original assignee: Shanghai Xinfu Environmental Technology & Engineering Co ltd
Current assignee: Shanghai Xinfu Environmental Technology & Engineering Co ltd
Priority date: 2020-08-26
Filing date: 2020-08-26
Publication date: 2021-04-20
Anticipated expiration: 2030-08-26

Abstract

The utility model relates to a noise elimination and dust removal device for blast furnace diffusion, which comprises a buffer tank arranged behind a diffusion valve, and a high-temperature high-pressure gas in a weighing tank is filled into the buffer tank through the diffusion valve; the exhaust valve is arranged behind the buffer tank, and after the buffer tank is filled with gas, the exhaust valve can be opened to enable low-pressure high-temperature gas to enter the dust remover for treatment; the pipeline is used for introducing high-pressure and high-temperature gas in the weighing tank into the buffer tank through the bleeding valve, and introducing low-pressure and high-temperature dusty gas in the buffer tank, low-pressure and high-temperature dusty gas in the weighing tank and micro-pressure normal-temperature gas in the weighing tank into the dust remover through the exhaust valve and the upper sealing valve respectively for treatment; the dust remover can treat the diffused gas in the weighing tank; the bleeding valve is connected to the buffer tank through a pipeline, and partial gas enters the buffer tank before high-temperature and high-pressure gas in the weighing tank is bled. The utility model discloses can detach the dust more than 90% in the diffused gas, make the diffused noise below 90dB, can reduce environmental pollution.

Description

Silencing and dust-removing device for blast furnace diffusion

Technical Field

The utility model relates to the field of environmental protection, especially, relate to a noise elimination dust collector that blast furnace diffuses.

Background

The charging process of a general bell-less iron-making blast furnace is that mixed materials of ore, coke or coal are conveyed to a receiving tank through a belt conveyor, then enter a weighing tank through a charging gate, and finally enter the blast furnace through a discharging gate. Before the material enters the weighing tank from the receiving tank, the relief valve must be opened first, the high-pressure gas in the weighing tank is discharged, then the relief valve is closed, then the upper sealing valve and the feeding gate are opened, so that the material can smoothly fall into the weighing tank from the receiving tank, and finally the feeding gate and the upper sealing valve are closed. Before the material gets into the blast furnace by weighing the jar, must open the equalizer valve earlier, to weighing the jar interior injection net coal gas or nitrogen gas, when weighing jar internal gas pressure and blast furnace internal gas pressure when the basic sameness, close the equalizer valve and open the unloading floodgate, the material gets into the blast furnace smoothly from weighing the jar, closes the unloading floodgate at last to wait for next time reinforced. The cyclone dust collector and the silencer are arranged behind the blow-off valve, blow-off gas is recycled or discharged into the atmosphere after passing through the silencer, the blow-off valve is connected with the cyclone dust collector through a pipeline, and dust collected by the cyclone dust collector falls into the material receiving tank through the dust discharging pipe for cyclic utilization.

In the process, the high-pressure high-temperature gas quickly discharged from the bleeding valve within 3-5 seconds contains dust and generates noise up to 125 dB. At present, the treatment methods at home and abroad are as follows: a cyclone dust collector and a silencer are arranged behind the blow-off valve to eliminate dust and noise pollution, but due to the fact that the dust collection efficiency of the cyclone dust collector is low, part of dust enters the silencer and blocks micropores in the silencing cotton, and therefore the silencer can be rapidly disabled. In addition, after the upper sealing valve is opened, in the process that the materials fall into the weighing tank from the material receiving tank, the materials are extruded, dust-containing gas is also generated and discharged from the upper sealing valve, and part of the dust-containing gas is not treated, so that the environment is polluted. And the noise is aerodynamic noise, and when the bleeding valve is rapidly opened, high-pressure high-temperature gas at about 250 ℃ with gauge pressure of 0.1MPa to 0.25MPa is discharged from the muffler at a speed of about 340m/s, thereby generating high decibel noise.

Disclosure of Invention

The utility model aims at overcoming the above insufficiency, providing a noise elimination dust collector of blast furnace diffusing noise, both can detach the dust more than 90% in the diffusing gas, can make the diffusing noise below 90dB again to can reduce environmental pollution.

The purpose of the utility model is realized through the following technical scheme: a noise elimination and dust removal device for blast furnace diffusion comprises: the buffer tank is arranged behind the bleeding valve, and the high-temperature and high-pressure gas in the weighing tank is filled into the buffer tank through the bleeding valve; the exhaust valve is arranged behind the buffer tank, and can be opened after the buffer tank is filled with gas, so that low-pressure high-temperature gas enters the dust remover for treatment; the pipeline is used for introducing high-pressure and high-temperature gas in the weighing tank into the buffer tank through the bleeding valve, and introducing low-pressure and high-temperature dusty gas in the buffer tank, low-pressure and high-temperature dusty gas in the weighing tank and micro-pressure normal-temperature gas in the weighing tank into the dust remover through the exhaust valve and the upper sealing valve respectively for treatment; the drainage type three-way pipe comprises a main flow pipeline and a branch flow pipeline, wherein the main flow pipeline and the branch flow pipeline are arranged between an upper sealing valve and a pipeline at one end of an exhaust valve and an inlet pipeline of a dust remover, and an included angle between the main flow pipeline and the branch flow pipeline is less than or equal to 30 degrees, so that when gas flows through the main flow pipeline, the gas in the branch flow pipeline is introduced; one end of the dust remover is connected with the receiving tank through an ash discharge pipe, and the other end of the dust remover is connected with the buffer tank through a pipeline, so that the diffused gas in the weighing tank can be processed; the ash discharge pipe is arranged between the ash outlet of the dust remover and the receiving tank; the bleeding valve is connected to the buffer tank through a pipeline, and partial gas enters the buffer tank before high-temperature and high-pressure gas in the weighing tank is bled.

The utility model discloses a further improvement lies in: the buffer tank can be arranged on the ground or divided into a plurality of small tanks and arranged on a platform at the upper part of the blast furnace.

The utility model discloses a further improvement lies in: the air outlet of the buffer tank is arranged at the bottom of the buffer tank, so that the dust accumulated in the buffer tank can be conveniently conveyed to a dust remover for treatment.

The utility model discloses a further improvement lies in: the dust collector adopts an inefficient cyclone dust collector or an efficient dust collector.

The utility model discloses a further improvement lies in: the dust remover is arranged on the blast furnace or the ground.

Compared with the prior art, the utility model the advantage that has do: set up buffer tank and discharge valve between diffuse valve and dust remover, reduced and weighed jar in gas pressure, and then reduced the exhaust velocity of dust remover export to diffuse the exhaust noise has been reduced. And because the exhaust noise is greatly reduced, the traditional muffler can be eliminated, the reliability and the noise reduction effect of the diffusion system are greatly improved, and meanwhile, the dust-containing gas from the upper sealing valve can be treated, so that the environmental pollution is reduced. If the cyclone dust collector is used, the dust removal efficiency is improved.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

reference numbers in the figures: 1-feeding belt conveyor, 2-receiving tank, 3-feeding gate, 4-upper sealing valve, 5-pressure equalizing valve, 6-weighing tank, 7-discharging gate, 8-blast furnace, 9-blow-off valve, 10-pipeline, 11-dust remover, 12-exhaust valve, 13-ash-discharging pipe, 14-buffer tank and 15-drainage type three-way pipe.

The specific implementation mode is as follows:

in order to deepen the understanding of the present invention, the present invention will be further described in detail with reference to the following embodiments and the attached drawings, and the embodiments are only used for explaining the present invention, and do not constitute the limitation to the protection scope of the present invention.

Fig. 1 shows an embodiment of the muffling and dedusting device for blast furnace diffusion of the present invention: the method comprises the following steps: a buffer tank 14 arranged behind the bleeding valve 9, and the high-temperature and high-pressure gas in the weighing tank 6 is filled into the buffer tank 14 through the bleeding valve 9; the exhaust valve 12 is arranged behind the buffer tank 14, after the buffer tank 14 is filled with gas, the relief valve 9 is closed, and meanwhile, the exhaust valve 12 is opened, so that low-pressure high-temperature gas enters the dust remover 11 through the exhaust valve 12 for treatment; the pipeline 10 is used for introducing high-pressure and high-temperature gas in the weighing tank 6 into the buffer tank 14 through the relief valve 9, and introducing low-pressure and high-temperature dust-containing gas in the buffer tank 14, low-pressure and high-temperature dust-containing gas in the weighing tank 6 and micro-pressure normal-temperature gas into the dust remover 11 through the exhaust valve 12 and the upper sealing valve 4 respectively for treatment; the drainage type three-way pipe 15 comprises a main flow pipeline and a branch flow pipeline, and is arranged between the upper sealing valve 4 and the pipeline 10 at one end of the exhaust valve 12 and the inlet pipeline of the dust remover 11, wherein the included angle between the main flow pipeline and the branch flow pipeline is less than or equal to 30 degrees, so that when gas flows through the main flow pipeline, the gas in the branch flow pipeline is introduced; one end of the dust remover 11 is connected with the receiving tank 2 through an ash discharge pipe 13, and the other end of the dust remover 11 is connected with a buffer tank 14 through a pipeline 10, so that the diffused gas in the weighing tank can be processed; the ash discharge pipe 13 is arranged between the ash outlet of the dust remover 11 and the receiving tank 2, so that the dust can fall into the receiving tank 2 for cyclic utilization; before the bleeding valve 9 is connected to the buffer tank 14 through the pipeline 10 and the high-temperature and high-pressure gas in the weighing tank 6 is bled, part of the gas firstly enters the buffer tank 14; the buffer tank 14 can be arranged on the ground or divided into a plurality of small tanks and arranged on a platform at the upper part of the blast furnace 8; the buffer tank 14 has an exhaust port at the bottom thereof so that the dust accumulated therein is sent to the dust collector 11 for disposal. The dust remover 11 adopts an inefficient cyclone dust remover or an efficient dust remover, but adopts a computer simulation technology to optimize the internal flow field structure thereof so as to improve the dust removal efficiency. For the cyclone dust collector, when the inlet wind speed is more than 25m/s, the dust collection efficiency is reduced along with the increase of the inlet wind speed, so that the diffusing exhaust speed is reduced, and the improvement of the dust collection efficiency of the cyclone dust collector is facilitated; the dust remover 11 is arranged on the blast furnace 8 or the ground; the feeding belt conveyor 1 is used for conveying the mixed materials of the ore and the coke or the coal to the receiving tank 2 through the feeding belt conveyor 1.

The utility model discloses set up buffer tank and discharge valve between diffuse valve and dust remover, reduced and weighed jar in gas pressure, and then reduced the exhaust velocity of dust remover export to diffuse exhaust noise has been reduced. And because the exhaust noise is greatly reduced, the traditional muffler can be eliminated, the reliability and the noise reduction effect of the diffusion system are greatly improved, and meanwhile, the dust-containing gas from the upper sealing valve can be treated, so that the environmental pollution is reduced. If the cyclone dust collector is used, the dust removal efficiency is improved.

The sound power of the diffused noise of the blast furnace is in direct proportion to the 8 th power of the velocity of the exhaust gas, and the velocity of the exhaust gas has a certain direct proportion relation with the gas pressure, so that the velocity of the exhaust gas is reduced, and the diffused noise can be effectively reduced. When the flow velocity of the exhaust gas at the outlet of the dust catcher is reduced from about 340m/s to about 120m/s, the noise generated can be reduced from about 125dB to about 90dB, and then it is no longer necessary to provide a silencer at the outlet of the dust catcher. Meanwhile, when the lower gas flow velocity passes through the cyclone dust collector, the dust collection efficiency is higher. Thus, reducing the discharge pressure reduces both noise and hence muffler and dust emission.

The applicant further states that the present invention is described by the above embodiments, but the present invention is not limited to the above embodiments, i.e. the present invention is not limited to the above embodiments, and the present invention can be implemented only by relying on the above methods and structures. It should be clear to those skilled in the art that any improvement of the present invention is to the present invention, and the addition of the equivalent replacement of the implementation method and the steps, the selection of the specific mode, etc. all fall within the protection scope and the disclosure scope of the present invention.

The utility model discloses not limited to above-mentioned embodiment, all adopt and the utility model discloses similar structure and method realize the utility model discloses all modes of purpose all are within the protection scope of the utility model.

Claims

1. The utility model provides a noise elimination dust collector that blast furnace diffuses which characterized in that: the method comprises the following steps:

the buffer tank (14) is arranged behind the bleeding valve (9), and the high-temperature and high-pressure gas in the weighing tank (6) is filled into the buffer tank (14) through the bleeding valve (9);

the exhaust valve (12) is arranged behind the buffer tank (14), and after the buffer tank (14) is filled with gas, the exhaust valve (12) can be opened to enable low-pressure high-temperature gas to enter the dust remover (11) for treatment;

the pipeline (10) is used for introducing high-pressure and high-temperature gas in the weighing tank (6) into the buffer tank (14) through the bleeding valve (9), and introducing low-pressure and high-temperature dust-containing gas in the buffer tank (14), low-pressure and high-temperature dust-containing gas in the weighing tank (6) and micro-pressure normal-temperature gas into the dust remover (11) through the exhaust valve (12) and the upper sealing valve (4) respectively for treatment;

the drainage type three-way pipe (15) comprises a main flow pipeline and a branch flow pipeline, and is arranged between the upper sealing valve (4) and the pipeline (10) at one end of the exhaust valve (12) and the inlet pipeline of the dust remover (11), wherein the included angle between the main flow pipeline and the branch flow pipeline is less than or equal to 30 degrees, so that when gas flows through the main flow pipeline, the gas in the branch flow pipeline is introduced;

one end of the dust remover (11) is connected with the receiving tank (2) through an ash discharge pipe (13), and the other end of the dust remover (11) is connected with a buffer tank (14) through a pipeline (10), so that the diffused gas in the weighing tank can be processed;

the ash discharge pipe (13) is arranged between the ash outlet of the dust remover (11) and the material receiving tank (2);

the bleeding valve (9) is connected with the buffer tank (14) through a pipeline (10), and part of gas enters the buffer tank (14) before high-temperature and high-pressure gas in the weighing tank (6) is bled.

2. The muffling and dedusting device for blast furnace bleeding according to claim 1, wherein: the buffer tank (14) can be arranged on the ground or divided into a plurality of small tanks and arranged on a platform at the upper part of the blast furnace (8).

3. The muffling and dedusting device for blast furnace bleeding according to claim 2, wherein: the air outlet of the buffer tank (14) is arranged at the bottom of the buffer tank, so that the dust accumulated in the buffer tank can be conveniently sent to the dust remover (11) for treatment.

4. The muffling and dedusting device for blast furnace bleeding according to claim 1, wherein: the dust remover (11) adopts a low-efficiency cyclone dust remover or a high-efficiency dust remover.

5. The muffling and dedusting device for blast furnace bleeding according to claim 1, wherein: the dust remover (11) is arranged on the blast furnace (8) or the ground.