CN213348392U

CN213348392U - Device for preventing horizontal flue dust deposition of cement kiln flue gas SCR denitration system

Info

Publication number: CN213348392U
Application number: CN202021495913.2U
Authority: CN
Inventors: 侯素克
Original assignee: Wuhan Xinfeng Cement Co ltd
Current assignee: Wuhan Xinfeng Cement Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-06-04
Anticipated expiration: 2030-07-24

Abstract

The utility model discloses a device for preventing cement kiln flue gas SCR deNOx systems horizontal flue deposition, its technical scheme is: the dust-proof device comprises a flue body, wherein an ash-deposition-preventing mechanism is arranged in the flue body; prevent deposition mechanism is including linking up the pole, it locates inside the flue body to link up the pole, it passes through slide rail swing joint with the flue body to link up the pole, it is equipped with a plurality of first guide plates, and is a plurality of to link up the pole outside inside the flue body is all located to first guide plate, the inside second guide plate that is equipped with of flue body, the beneficial effects of the utility model are that: through the design of preventing deposition mechanism, solved horizontal flue body flue gas deposition, the flue gas velocity of flow is unstable, and the easy problem of blockking up of reactor top layer catalyst has thoroughly been solved simultaneously and has been connected flue body deposition problem for this internal flow field of flue is even stable, and reactor top layer catalyst is difficult for blockking up, and denitration efficiency improves, reduces the denitration and spouts ammonia volume, reduces ammonia escape.

Description

Device for preventing horizontal flue dust deposition of cement kiln flue gas SCR denitration system

Technical Field

The utility model relates to a deposition technical field is prevented to the flue, concretely relates to prevent device of cement kiln flue gas SCR deNOx systems horizontal flue deposition.

Background

China is a main cement production country, NOx emission caused by cement production is about 200 million t/a, accounts for 15% of national NOx industrial emission, is the third largest emission source behind thermal power plants and motor vehicles, and under the guidance of national environmental protection policies, the cement kiln smoke implementation ultra-clean emission and the annual improvement of emission standards become the major trend of future development.

The SCR denitration technology is one of main technologies for efficiently removing NOx, the technology is agreed by cement enterprises, in the cement kiln flue gas 'high-temperature dust remover + SCR denitration' technology, the high-temperature dust remover is connected with an SCR reactor through a horizontal flue, a large amount of dust deposition is often generated in the horizontal flue during cement production, meanwhile, the dust deposition is easy to agglomerate when the flue gas contains large water, so that the flow velocity and the flow field of the flue gas in the flue are changed, and the top catalyst is easy to collapse when the draft of the flue is changed, so that the top catalyst is blocked in a large area.

The prior art has the following defects: in the prior art, a horizontal flue connected between a high-temperature dust remover and an SCR reactor is designed, a guide plate and a flue support are arranged in the flue, and the guide plate is used for guiding flue gas through the guide plate, but the prior art still has many defects, for example, the horizontal flue generates a large amount of dust deposition in the cement kiln production, the effective area of the flue is reduced, the dust deposition causes the change of the flow velocity and the flow field of the flue gas, the original guide plate loses the effect, the distribution of the flow field of the flue gas in the reactor is further influenced, and the denitration efficiency is influenced.

Therefore, the invention is necessary to provide a device for preventing the ash deposition of the horizontal flue of the cement kiln flue gas SCR denitration system.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a prevent device of cement kiln flue gas SCR deNOx systems horizontal flue deposition, design through preventing deposition mechanism, horizontal flue body flue gas deposition has been solved, the flue gas velocity of flow is unstable, the easy problem of blockking up of reactor top layer catalyst, thoroughly solved simultaneously and connected flue body deposition problem, make this internal flow field of flue evenly stable, reactor top layer catalyst is difficult for blockking up, denitration efficiency improves, reduce the denitration and spout ammonia volume, reduce ammonia escape, convenient to use person's use, lead to the flue gas velocity of flow with solving the deposition, the flow field changes, make original guide plate lose effect, further influence flue gas flow field distribution in the reactor, influence the problem of denitration efficiency.

In order to achieve the above object, the present invention provides the following technical solutions: a device for preventing dust deposition of a horizontal flue of a cement kiln flue gas SCR denitration system comprises a flue body, wherein a dust deposition prevention mechanism is arranged in the flue body;

prevent deposition mechanism is including linking up the pole, it locates inside the flue body to link up the pole, it passes through slide rail swing joint with the flue body to link up the pole, it is outside to link up the pole and is equipped with a plurality of first guide plates, and is a plurality of inside the flue body is all located to first guide plate, inside being equipped with the second guide plate of flue body, first guide plate one side is located to the second guide plate.

Preferably, an expansion joint is arranged outside the flue body.

Preferably, the expansion joint is disposed between the first baffle and the plurality of second baffles.

Preferably, a plurality of inner supporting rods are fixedly arranged inside the flue body.

Preferably, the tops of the plurality of inner support rods are fixedly connected with the top of the inner cavity of the flue body, and the bottoms of the plurality of inner support rods are fixedly connected with the bottom of the inner cavity of the flue body.

Preferably, a connecting rod is fixedly arranged on one side of the flue body, and an included angle is formed between the connecting rod and the flue body.

The utility model has the advantages that:

the utility model discloses a design of preventing deposition mechanism has solved horizontal flue body flue gas deposition, and the flue gas velocity of flow is unstable, and the problem of the easy jam of reactor top layer catalyst has thoroughly solved simultaneously and has connected flue body deposition problem for this internal flow field of flue is even stable, and reactor top layer catalyst is difficult for blockking up, and denitration efficiency improves, reduces the denitration and spouts the ammonia volume, reduces ammonia escape, convenient to use person's use.

Drawings

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

fig. 2 is a cross-sectional view provided by the present invention;

fig. 3 is a schematic diagram of the present invention after the included angle is changed;

fig. 4 is a cross-sectional view of the utility model with a changed included angle;

in the figure: the flue comprises a flue body 1, a connecting rod 2, a first guide plate 3, a second guide plate 4, an expansion joint 5, an inner support rod 6, a connecting rod 7 and an included angle 8.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

Referring to the attached drawings 1-4, the device for preventing the dust deposition of the horizontal flue of the cement kiln flue gas SCR denitration system provided by the utility model comprises a flue body 1, wherein a dust deposition prevention mechanism is arranged inside the flue body 1;

prevent deposition mechanism including linking pole 2, it locates inside 1 to link pole 2 flue body, link pole 2 and flue body 1 pass through slide rail swing joint, it is equipped with a plurality of first guide plates 3 to link pole 2 outside, and is a plurality of inside 1 flue body is all located to

first guide plate

3, 1 inside second guide plate 4 that is equipped with of flue body, 3 one side of first guide plate are located to second guide plate 4.

Further, an expansion joint 5 is arranged outside the flue body 1.

Further, the expansion joints 5 are arranged between the first baffle 3 and the plurality of second baffles 4.

Furthermore, a plurality of inner support rods 6 are fixedly arranged inside the flue body 1.

Furthermore, the tops of the inner support rods 6 are fixedly connected with the top of the inner cavity of the flue body 1, and the bottoms of the inner support rods 6 are fixedly connected with the bottom of the inner cavity of the flue body 1.

Further, a connecting rod 7 is fixedly arranged on one side of the flue body 1, and an included angle 8 is formed between the connecting rod 7 and the flue body 1.

The utility model discloses a use as follows: when the utility model is used, a certain included angle 8 is formed between the flue body 1 and a horizontal line, the positions and the shapes of the first guide plate 3 and the second guide plate 4 are changed, the included angle 8, the first guide plate 3 and the second guide plate 4 are determined by the numerical simulation of the CFD airflow distribution of the flue body 1, the position and the shape of the first guide plate 3 and the second guide plate 4 are adjusted and the included angle 8 on the flue body 1 is changed, the flow field distribution inside the reactor is optimal under the condition that no dust is accumulated in the flue body 1 by combining the flow rate of the flue gas, the problems of the ash accumulation of the flue gas of the horizontal flue body 1, the unstable flow rate of the flue gas and the easy blockage of a catalyst at the top layer of the reactor are solved, the problem of the dust accumulation of the connecting flue body 1 is thoroughly solved, the flow field in the flue body 1 is uniform and stable, the catalyst at, the denitration ammonia injection amount is reduced, ammonia escape is reduced, and the denitration ammonia injection device is convenient for users to use.

The above description is only a preferred embodiment of the present invention, and any person skilled in the art may modify the present invention or modify it into an equivalent technical solution by using the technical solutions described above. Therefore, any simple modifications or equivalent replacements made according to the technical solution of the present invention belong to the scope of the claimed invention as far as possible.

Claims

1. The utility model provides a prevent device of cement kiln flue gas SCR deNOx systems horizontal flue deposition, includes flue body (1), its characterized in that: an ash deposition prevention mechanism is arranged inside the flue body (1);

prevent deposition mechanism including linking pole (2), it is inside flue body (1) to link pole (2) to locate, link pole (2) and flue body (1) are through slide rail swing joint, it is equipped with a plurality of first guide plates (3) to link pole (2) outside, and is a plurality of flue body (1) inside is all located in first guide plate (3), flue body (1) inside is equipped with second guide plate (4), first guide plate (3) one side is located in second guide plate (4).

2. The device for preventing the ash deposition of the horizontal flue of the cement kiln flue gas SCR denitration system as claimed in claim 1, wherein: an expansion joint (5) is arranged outside the flue body (1).

3. The device for preventing the ash deposition of the horizontal flue of the cement kiln flue gas SCR denitration system as claimed in claim 2, wherein: the expansion joint (5) is arranged between the first guide plate (3) and the second guide plates (4).

4. The device for preventing the ash deposition of the horizontal flue of the cement kiln flue gas SCR denitration system as claimed in claim 1, wherein: a plurality of inner supporting rods (6) are fixedly arranged inside the flue body (1).

5. The device for preventing the ash deposition of the horizontal flue of the cement kiln flue gas SCR denitration system as claimed in claim 4, wherein: the tops of the inner support rods (6) are fixedly connected with the top of the inner cavity of the flue body (1), and the bottoms of the inner support rods (6) are fixedly connected with the bottom of the inner cavity of the flue body (1).

6. The device for preventing the ash deposition of the horizontal flue of the cement kiln flue gas SCR denitration system as claimed in claim 1, wherein: the flue is characterized in that a connecting rod (7) is fixedly arranged on one side of the flue body (1), and an included angle (8) is formed between the connecting rod (7) and the flue body (1).