CN219010345U

CN219010345U - Crude gas dust remover

Info

Publication number: CN219010345U
Application number: CN202223545784.5U
Authority: CN
Inventors: 田辉; 熊拾根; 邹达基; 代茂林
Original assignee: CISDI Engineering Co Ltd
Current assignee: CISDI Engineering Co Ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-05-12
Anticipated expiration: 2032-12-29

Abstract

The utility model relates to a crude gas dust remover, and belongs to the field of metallurgical dust removers. An inlet diffusion pipe, a middle buffer chamber and a lower ash storage chamber are sequentially arranged in the dust remover shell from top to bottom; the middle buffer chamber comprises an inner cylinder body, an outflow channel and a plurality of cyclone chambers, and each cyclone chamber is uniformly distributed at the periphery of the inner cylinder body in a ring manner; the upper part of the cyclone chamber is communicated with the inner cylinder, and the lower part of the cyclone chamber is communicated with the lower ash storage chamber; the top exhaust pipes communicated with the exhaust channels are correspondingly arranged on the cyclone chambers. The dust remover can effectively reduce the ash load of the follow-up gas fine dust removal, and is beneficial to the work of the gas fine dust removal; the dust removing device not only can be applied to the dust removal of the crude gas of a newly built blast furnace, but also is applicable to the dust removal and reconstruction of the crude gas of an old blast furnace, and has the advantages of simple structure, cost saving, no site limitation and the like.

Description

Crude gas dust remover

Technical Field

The utility model belongs to the field of metallurgical dust collectors, and particularly relates to a raw gas dust collector.

Background

The most common raw gas dust removal technology of the existing blast furnace is a gravity dust remover. The gravity dust remover has the advantages of reliable operation and small maintenance amount, but has low dust removal efficiency, and the dust removal efficiency is about 40-50%; the axial cyclone dust collector is also selected, but the refractory material or lining plate on the inner wall of the dust collector is easy to fall off, so that ash discharge blockage is easy to be caused, the maintenance amount is large, and the normal production of the blast furnace is influenced.

The existing gas clean dust removal mostly adopts a dry dust removal process, the dust removal efficiency of a crude gas system is directly related to the working quality of the follow-up gas fine dust removal, and for a dry bag-type dust remover, the dust removal process hopes that as much large-particle gas dust as possible can be removed in advance before entering the dry dust removal process, and the dust load is reduced, so that the gas fine dust removal work is facilitated. Therefore, how to improve the dust removal efficiency of the gravity dust remover is a subject worthy of research.

Disclosure of Invention

In view of the above, an object of the present utility model is to provide a raw gas dust collector that achieves removal of as much large-particle gas dust as possible before dry dust collection, and reduces the ash load on subsequent equipment.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the crude gas dust remover comprises a dust remover shell 1, wherein an inlet diffusion pipe 7, a middle buffer chamber 2 and a lower ash storage chamber 11 are sequentially arranged in the dust remover shell 1 from top to bottom; the middle buffer chamber 2 comprises an inner cylinder 12 and an outflow channel 13 arranged at the bottom of the inner cylinder 12, wherein the top of the inner cylinder 12 is communicated with the inlet diffusion pipe 7, the middle part is provided with a reflecting cone 9, and the outflow channel 13 is communicated with the lower ash storage chamber 11; the bottom of the lower ash storage chamber 11 is communicated with an ash discharge port 5; the middle buffer chamber 2 also comprises a plurality of cyclone chambers 3, and each cyclone chamber 3 is uniformly distributed at the periphery of the inner cylinder 12 along the central axis of the dust remover shell 1; the upper part of each cyclone chamber 3 is communicated with the upper part of the inner cylinder 12 through a short pipe, and the lower part is communicated with the lower ash storage chamber 11; a top exhaust pipe 8 is correspondingly arranged on each cyclone chamber 3, and the top exhaust pipe 8 is communicated with an exhaust channel 6 arranged on the dust remover shell 1; the outer wall of the inlet diffusion pipe 7 is provided with a first dust baffle 10-1, the inner wall surface of the dust collector shell 1 above the top exhaust pipe 8 is provided with a second dust baffle 10-2, and the second dust baffle 10-2 is positioned below the first dust baffle 10-1.

Further, the cyclone chamber 3 comprises a straight cylinder section 302 positioned in the middle, a sealing head section 301 arranged above the straight cylinder section 302 and a lower cone section 303 arranged at the bottom of the straight cylinder section 302; the top exhaust pipe 8 passes through the head section 301 and extends into the straight barrel section 302, and the lower cone section 303 communicates with the lower ash storage chamber 11.

Further, the reflecting cone 9 has a hollow or solid cone structure with a narrow upper part and a wide lower part.

Further, the first dust plate 10-1 has a conical bucket structure with a narrow upper part and a wide lower part; the second dust plate 10-2 has an inverted cone-shaped bucket structure with a wide upper part and a narrow lower part.

Further, the inlet diffuser 7 is connected to a down pipe 14 of the blast furnace through the intake passage 4.

Further, a gas shutoff valve 15 is installed in the intake passage 4.

Further, the inlet diffuser 7, the inner cylinder 12, the reflection cone 9 and the dust discharge opening 5 are all disposed on the central axis of the dust collector housing 1.

Further, the inner wall of the dust collector housing 1, the inner and outer walls of the inlet diffusion tube 7, the inner wall of the exhaust passage 6, the surface of the reflection cone 9, and the inner surface of the cyclone chamber 3 are provided with a high temperature resistant and wear resistant coating or lining plate.

Further, a manhole is provided on the outside of the dust collector housing 1.

The utility model has the beneficial effects that:

the dust remover has high dust removing efficiency, can effectively reduce the ash load of the follow-up gas fine dust removal, and is beneficial to the work of gas fine dust removal; the surfaces of all parts in the dust remover are provided with high-temperature-resistant and wear-resistant coatings or lining plates, so that the service life of the dust remover can be prolonged; the outer side of the dust remover shell is provided with a manhole, so that the overhaul and the blockage removal are convenient; the scheme can be applied to the dust removal of the raw gas of the newly built blast furnace, is also applicable to the dust removal and transformation of the raw gas of the old blast furnace, and has the advantages of simple structure, cost saving, no site limitation and the like.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:

fig. 1 is a schematic structural view of the present utility model.

Reference numerals: the dust remover comprises a dust remover shell 1, a middle buffer chamber 2, a cyclone chamber 3, a seal head section 301, a straight cylinder section 302, a lower cone section 303, an air inlet channel 4, an ash discharge port 5, an air discharge channel 6, an inlet diffusion pipe 7, a top air discharge pipe 8, a reflecting cone 9, a first dust plate 10-1, a second dust plate 10-2, a lower ash storage chamber 11, an inner cylinder body 12, an outflow channel 13, a descending pipe 14 and a coal gas shutoff valve 15.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1, a raw gas dust remover comprises a dust remover shell 1, wherein an inlet diffusion pipe 7, a middle buffer chamber 2 and a lower ash storage chamber 11 are sequentially arranged in the dust remover shell 1 from top to bottom; the middle buffer chamber 2 comprises an inner cylinder 12 and an outflow channel 13 arranged at the bottom of the inner cylinder 12, wherein the top of the inner cylinder 12 is communicated with the inlet diffusion pipe 7, the middle part is provided with a reflecting cone 9, and the outflow channel 13 is communicated with the lower ash storage chamber 11; the bottom of the lower ash storage chamber 11 is communicated with an ash discharge port 5; the middle buffer chamber 2 also comprises a plurality of cyclone chambers 3, and each cyclone chamber 3 is uniformly distributed at the periphery of the inner cylinder 12 along the central axis of the dust remover shell 1; the upper part of each cyclone chamber 3 is communicated with the upper part of the inner cylinder 12 through a short pipe, and the lower part is communicated with the lower ash storage chamber 11; a top exhaust pipe 8 is correspondingly arranged on each cyclone chamber 3, and the top exhaust pipe 8 is communicated with an exhaust channel 6 arranged on the dust remover shell 1; the outer wall of the inlet diffusion pipe 7 is provided with a first dust baffle 10-1, the inner wall surface of the dust collector shell 1 above the top exhaust pipe 8 is provided with a second dust baffle 10-2, and the second dust baffle 10-2 is positioned below the first dust baffle 10-1.

The cyclone chamber 3 comprises a straight cylinder section 302 positioned at the middle part, a seal head section 301 arranged above the straight cylinder section 302, and a lower cone section 303 arranged at the bottom of the straight cylinder section 302. The top exhaust pipe 8 passes through the head section 301 and extends into the straight barrel section 302, and the lower cone section 303 communicates with the lower ash storage chamber 11.

In this scheme, the middle buffer chamber 2 is formed by an inner cylinder 12, an outflow channel 13 and a plurality of cyclone chambers 3, the top of the inner cylinder 12 is closed, the inlet of the middle buffer chamber 2 is the outlet end of the inlet diffusion pipe 7, the outlet of the middle buffer chamber 2 has two parts, one part is the outflow channel 13 and the lower cone section 303 of the cyclone chamber 3, the other part is the top exhaust pipe 8 arranged on each cyclone chamber 3, and the part is used for discharging gas.

Preferably, the reflecting cone 9 is a hollow or solid cone structure with a narrow upper part and a wide lower part. The inlet diffusion pipe 7, the inner cylinder 12, the reflecting cone 9 and the ash discharge opening 5 are all arranged on the central axis of the dust remover shell 1. The reflecting cone 9 is arranged right below the outlet end of the inlet diffusion pipe 7, so that the coal gas flowing downwards through the inlet diffusion pipe 7 can turn back to the direction, and then enters the cyclone chambers 3 through short pipes. The upper end of the top exhaust pipe 8 in each cyclone chamber 3 passes through the seal head section 301, the lower end of the top exhaust pipe 8 extends into the straight cylinder section 302, and the lower port of the top exhaust pipe 8 is lower than the port surface of the short pipe, so that the gas flowing into the cyclone chamber 3 through the short pipe can realize cyclone.

As a further optimization of the scheme, the first dust plate 10-1 is of a conical bucket structure with a narrow upper part and a wide lower part; the second dust plate 10-2 has an inverted cone-shaped bucket structure with a wide upper part and a narrow lower part. The port of the exhaust passage 6 is higher than the first dust plate 10-1. This arrangement allows the gas to further achieve particle settling during the discharge process.

In the scheme, an inlet diffusion pipe 7 is connected with a down pipe 14 of a blast furnace through an air inlet channel 4, and a gas shutoff valve 15 is arranged in the air inlet channel 4 so as to realize connection and communication control with adjacent equipment.

As a further optimization of the above scheme, the inner wall of the dust collector shell 1, the inner wall and the outer wall of the inlet diffusion pipe 7, the inner wall of the exhaust channel 6, the surface of the reflecting cone 9 and the inner surface of the cyclone chamber 3 are all provided with high-temperature resistant and wear-resistant coatings or lining plates. This may increase the service life of the device.

As a further optimization of the above scheme, the outer side of the dust collector housing 1 is provided with a manhole so as to facilitate equipment overhaul.

The working process of the system is as follows:

raw gas flow enters the air inlet channel 4 from the down pipe 14 of the blast furnace, then enters the inner cylinder 12 of the middle buffer chamber 2 through the inlet diffusion pipe 7, when passing through the inlet diffusion pipe 7, a part of large particles are precipitated to the lower ash storage chamber 11 through the action of gravity, after passing through the reflection cone 9, the gas flow is turned back upwards, reaches the circulation channel and then enters the progressive cyclone chamber 3 through the inlet pipe (short pipe) of the cyclone chamber 3, and forms rotational flow to generate tangential and axial speeds; dust in the gas flow moves towards the inner wall of the dust collector shell 1 (the cyclone chamber 3 and the dust collector shell 1 share the inner wall) under the action of centrifugal force, and slides downwards along the inner wall of the dust collector shell 1 under the action of dead weight and air flow to enter the lower ash storage chamber 11. The first dust baffle 10-1 and the second dust baffle 10-2 arranged on the outer wall of the inlet diffusion pipe 7 and the inner wall of the dust remover shell 1 can block part of dust, so that the dust can be settled into the lower dust storage chamber 11, the gas flow enters the gas fine dust removal system through the exhaust passage 6, and the dust in the lower dust storage chamber 11 enters the dust removing device through the dust discharge port 5 to be discharged.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.

Claims

1. The crude gas dust remover comprises a dust remover shell (1), wherein an inlet diffusion pipe (7), a middle buffer chamber (2) and a lower ash storage chamber (11) are sequentially arranged in the dust remover shell (1) from top to bottom; the middle buffer chamber (2) comprises an inner cylinder body (12) and an outflow channel (13) arranged at the bottom of the inner cylinder body (12), wherein the top of the inner cylinder body (12) is communicated with the inlet diffusion pipe (7), the middle part is provided with a reflecting cone (9), and the outflow channel (13) is communicated with the lower ash storage chamber (11); the bottom of the lower ash storage chamber (11) is communicated with an ash discharge port (5); the method is characterized in that: the middle buffer chamber (2) also comprises a plurality of cyclone chambers (3), and each cyclone chamber (3) is uniformly distributed at the periphery of the inner cylinder body (12) along the central axis of the dust remover shell (1); the upper part of each cyclone chamber (3) is communicated with the upper part of the inner cylinder body (12) through a short pipe, and the lower part is communicated with the lower ash storage chamber (11); a top exhaust pipe (8) is correspondingly arranged on each cyclone chamber (3), and the top exhaust pipe (8) is communicated with an exhaust channel (6) arranged on the dust remover shell (1); the outer wall of the inlet diffusion pipe (7) is provided with a first dust baffle (10-1), the inner wall surface of the dust collector shell (1) above the top exhaust pipe (8) is provided with a second dust baffle (10-2), and the second dust baffle (10-2) is positioned below the first dust baffle (10-1).

2. The raw gas dust collector of claim 1, wherein: the cyclone chamber (3) comprises a straight cylinder section (302) positioned in the middle, a seal head section (301) arranged above the straight cylinder section (302) and a lower cone section (303) arranged at the bottom of the straight cylinder section (302); the top exhaust pipe (8) passes through the end socket section (301) and extends into the straight cylinder section (302), and the lower cone section (303) is communicated with the lower ash storage chamber (11).

3. The raw gas dust collector of claim 1, wherein: the reflecting cone (9) is a hollow or solid cone structure with a narrow upper part and a wide lower part.

4. The raw gas dust collector of claim 1, wherein: the first dust plate (10-1) is of a conical bucket structure with a narrow upper part and a wide lower part; the second dust baffle (10-2) is of an inverted cone-shaped bucket structure with a wide upper part and a narrow lower part.

5. The raw gas dust collector of claim 1, wherein: the inlet diffusion pipe (7) is connected with a down pipe (14) of the blast furnace through an air inlet channel (4).

6. The raw gas dust collector of claim 5, wherein: a gas shutoff valve (15) is arranged in the air inlet channel (4).

7. The raw gas dust collector of claim 5, wherein: the inlet diffusion pipe (7), the inner cylinder body (12), the reflecting cone (9) and the ash discharge port (5) are all arranged on the central axis of the dust remover shell (1).

8. The raw gas dust collector of claim 5, wherein: the inner wall of the dust collector shell (1), the inner wall and the outer wall of the inlet diffusion pipe (7), the inner wall of the exhaust channel (6), the surface of the reflecting cone (9) and the inner surface of the cyclone chamber (3) are all provided with high temperature resistant and wear resistant coatings or lining plates.

9. The raw gas dust collector of claim 1, wherein: a manhole is arranged on the outer side of the dust remover shell (1).