CN213050061U

CN213050061U - Adjustable wear-resisting flue gas guiding device

Info

Publication number: CN213050061U
Application number: CN202021451447.8U
Authority: CN
Inventors: 易作宏; 彭峻
Original assignee: Hunan Anpunuo Environmental Protection Technology Co ltd
Current assignee: Hunan Anpunuo Environmental Protection Technology Co ltd
Priority date: 2020-07-22
Filing date: 2020-07-22
Publication date: 2021-04-27
Anticipated expiration: 2030-07-22

Abstract

An adjustable wear-resistant flue gas guide device comprises a guide plate arranged in a flue, wherein the guide plate comprises a guide plate body, a rotating shaft and a cooling part, the rotating shaft is connected to the back of the guide plate body, two ends of the rotating shaft are connected with a flue wall, and one end of the rotating shaft extends out of the flue wall and is connected with a driving mechanism; and a cooling part is arranged between the flue wall and the rotating shaft. On one hand, the utility model can timely adjust the angle of the guide plate according to the working condition parameter change of the furnace kiln, so that the flue gas entering the denitration reactor is uniformly distributed, and the stable and efficient denitration efficiency and the long-term stable operation of the catalyst are ensured; on the other hand, compressed air is introduced between the sleeve and the rotating shaft, so that the end close to the bearing forms air seal, the bearing is isolated from being contacted with high-temperature flue gas in a flue, and the service life of the bearing is prolonged.

Description

Adjustable wear-resisting flue gas guiding device

Technical Field

The utility model relates to a technical field, especially an adjustable wear-resisting flue gas guiding device are handled to flue gas.

Background

In various boiler and kiln flue gas denitration systems, flue gas is introduced to an SCR denitration reactor from an original flue, and generally needs to pass through two bends and a rising vertical flue, so that a guide plate needs to be arranged at each bend in order to ensure that the gas flow uniformly enters the denitration reactor. The existing flue gas guide plates are fixedly arranged, and the guide plates are arranged to be subjected to air field simulation through a CFD model to determine the shape and the number. However, because the working condition of the boiler or the kiln often changes, the actual operation parameters and the design parameters of the boiler when leaving the factory are often greatly different, and the flow field simulation result is inconsistent with the actual situation. Especially, when the load changes and the coal quality changes, the flue gas flow and the flow rate parameters are larger, so that the flow guide effect of the airflow guide plate is not shown, and sometimes even the adverse effect is caused. In addition, the dust particles in the flue gas can cause extremely strong scouring to the guide plate at the bend, and the guide plate can be abraded after a long time. Once the guide plate is worn and torn, lose the water conservancy diversion effect, the flue gas that gets into denitration reactor is inhomogeneous, will lead to the flue gas local velocity of flow too fast when through denitration catalyst, and reaction time is too short, and denitration effect worsens, and export flue gas exceeds standard, causes ammonia escape to exceed standard again behind the ammonia spraying more. The serious consequence of the non-uniform flue gas is that the flow velocity is too high, partial catalyst is partially worn, the service life of the catalyst is shortened, waste is caused, partial flue gas is not thoroughly treated, and the exhaust gas exceeds the standard. Therefore, how to ensure the uniform distribution of the flue gas entering the denitration reactor is a key factor for ensuring the long-period stable operation of the denitration system.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the above-mentioned not enough of prior art and providing one kind and adjusting in a flexible way, make flue gas evenly distributed's adjustable wear-resisting flue gas guiding device.

The technical scheme of the utility model is that: an adjustable wear-resistant flue gas guide device comprises a guide plate arranged in a flue, wherein the guide plate comprises a guide plate body, a rotating shaft and a cooling part, the rotating shaft is connected to the back of the guide plate body, two ends of the rotating shaft are connected with a flue wall, and one end of the rotating shaft extends out of the flue wall and is connected with a driving mechanism; and a cooling part is arranged between the flue wall and the rotating shaft.

Further, the guide plate is arranged on the front side of the denitration reactor and is positioned at a corner of the vertical flue and the horizontal flue which rise in the denitration system.

Furthermore, the guide plates are multiple and are respectively arranged at the corners of the vertical flue and the horizontal flue.

Furthermore, the front surface of the guide plate body is pasted with a wear-resistant ceramic block; or the guide plate body is directly made of wear-resistant and steel-resistant plates.

Further, be equipped with the mounting box on the flue wall, mounting box department is equipped with the bearing, the rotation axis passes through the bearing after fixed through the fastener.

Further, the fastener includes a gland and a lock nut, the rotating shaft passes through the bearing and the gland and is fixed with the lock nut, and the gland seals the flue wall.

Further, cooling portion includes the sleeve pipe, the rotation axis periphery of flue inner wall side is located to the sleeve pipe, just the sleeve pipe is connected with the air compression device who locates the external world through body and valve.

Further, the body is communicated with the cavity between the tubes of the sleeve, and the body penetrates through the mounting box and the outer wall of the flue to be connected with an external air compression device.

Furthermore, the rotating shaft is provided with a section of shaft body after penetrating through the fastener, the section of shaft body is connected with the driving mechanism, and the driving mechanism is an electric actuating mechanism, a handle, a hand wheel or a worm wheel driving mechanism.

Further, the mounting box is filled with heat insulation materials or heat insulation casting materials.

The utility model has the advantages that: on one hand, the angle of the guide plate can be timely adjusted according to the change of the working condition parameters of the furnace, so that the flue gas entering the denitration reactor is uniformly distributed, and the stable and efficient denitration efficiency and the long-term stable operation of the catalyst are ensured; on the other hand, compressed air is introduced between the sleeve and the rotating shaft, so that the end close to the bearing forms air seal, the bearing is isolated from being contacted with high-temperature flue gas in a flue, and the service life of the bearing is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the baffle configuration of the embodiment of FIG. 1;

FIG. 3 is an enlarged view of the structure of the I-section of the embodiment shown in FIG. 2.

The attached drawings indicate the following:

1. a baffle; 2. a denitration reactor; 3. a vertical flue; 4. a horizontal flue; 5. a flue wall; 6. a wear-resistant ceramic block; 7. mounting a box; 8. a heat-insulating layer; 9. insulating castable; 11. a deflector body; 12. a rotating shaft; 13. a bearing; 14. a gland; 15. locking the nut; 16. a sleeve; 17. a pipe body; 18. a valve; 21. a rectifier; 121. and an operation end.

Detailed Description

The invention will be described in further detail with reference to the drawings and specific examples.

As shown in fig. 1 to 3: an adjustable wear-resistant flue gas guide device comprises a guide plate 1 arranged in a flue, wherein the guide plate 1 comprises a guide plate body 11, a rotating shaft 12 and a cooling part, the rotating shaft 12 is connected to the back of the guide plate body 11, two ends of the rotating shaft 12 are connected with a flue wall 5, and one end of the rotating shaft extends out of the flue wall and is connected with a driving mechanism; a cooling portion is provided between the flue wall 5 and the rotary shaft 12.

The scheme has the following advantages: (1) the angle of the guide plate can be timely adjusted according to the change of the working condition parameters of the furnace, so that the flue gas entering the denitration reactor is uniformly distributed, and the stable and efficient denitration efficiency and the long-term stable operation of the catalyst are ensured; (2) through setting up cooling portion, can prevent with the relevant part of rotation axis connection and high temperature flue gas contact.

Specifically, the guide plate 1 is arranged on the front side of the denitration reactor 2, and is positioned at the corner of the vertical flue 3 and the horizontal flue 4 which rise in the denitration system, and a plurality of guide plates 1 can be installed at the corner of the vertical flue 3 and the horizontal flue 4. In the embodiment, preferably, three sections of flow guiding parts are arranged along the flowing direction of flue gas, wherein the first section of flow guiding part is arranged at the front corner of a vertical flue ascending in the denitration system, and the second section of flow guiding part is arranged at the corner between the vertical flue and the horizontal flue; the third section of flow guide part is arranged at the direct corner of the horizontal flue and the denitration reactor. Each section of the flow guiding part preferably comprises two flow guiding plates, and the length of each section of the flow guiding plates can be the same or different.

The deflector body 11 of this embodiment is a heat-resistant steel plate, and the size and radian are determined according to the CFD flow field simulation result, and the rotating shaft is fixed on the back (i.e., leeward side) and the wear-resistant ceramic block 6 can be lined on the front (i.e., windward side). Or according to the coal quality and the smoke characteristics, the wear-resistant ceramic block can be not lined, but the wear-resistant ceramic block is directly made of wear-resistant heat-resistant steel or ordinary carbon steel, so that the thickness of the plate body is increased, and the wear allowance is increased. In this embodiment, the wear-resistant material or the lining wear-resistant ceramic block 6 is used to enhance the wear resistance of the deflector body 11 and greatly prolong the service life thereof.

In the embodiment, the rectifier 21 is arranged between the horizontal flue 4 and the denitration reactor 2, so that on one hand, flue gas flowing in the horizontal direction before entering a rectifier grid can be adjusted to flow vertically downwards; on the other hand, the incoming flue gas distribution can be integrated to be relatively uniform.

In this embodiment, the rotating shaft 12 is welded and fixed in the middle of the leeward side of the deflector body 11, the two ends of the rotating shaft 21 penetrate through the flue wall 5, the mounting box 7 is arranged on the outer wall of the flue, and the mounting box 7 is embedded into the inner wall of the flue and welded with the flue wall 5. A through hole is formed between the mounting box 7 and the flue wall 5, so that the mounting box 7 can conveniently penetrate through the rotating shaft 12, the mounting box 7 is connected with a bearing 13 at the position of the through hole, and the rotating shaft 12 penetrates through the bearing 13 and then is fixed through a fastening piece. The fastening member includes a gland 14 and a lock nut 15, the rotating shaft 12 passes through the bearing 13 and the gland 14 and is fixed with the lock nut 15, and the gland 14 seals the flue duct wall 5.

The rotating shaft 12 passes through the lock nut 15 and then has a section of shaft body as an operating end 121, the operating end 121 is a square head shaft end and can be connected with a driving mechanism, and the driving mechanism is an electric actuating mechanism, a handle, a hand wheel or a worm wheel driving mechanism and the like. An operation platform can be arranged outside the flue according to the field condition so as to operate the rotating shaft conveniently. The present embodiment preferably employs a handwheel operation.

In this embodiment, be equipped with heat preservation 8 in the flue, the height of mounting box 7 can be confirmed according to the thickness of heat preservation to bearing and lock nut etc. are outside the heat preservation of flue, convenient operation.

In this embodiment, the cooling portion includes a sleeve 16, and the sleeve 16 is disposed on the periphery of the rotating shaft on the inner wall side of the flue and connected to the mounting box 7. The sleeve 16 is connected to an air compressor unit located outside via a pipe 17 and a valve 18. The tube body 17 is communicated with the inter-tube cavity of the sleeve 16, namely, the tube body 17 is communicated between the sleeve 16 and the rotating shaft 12, and the tube body 17 penetrates through the mounting box 7 and the outer wall of the flue to be connected with an external air compression device. The compressed air flows into the flue through the cavity of the sleeve 16 to form an airtight seal to isolate the bearing 13 from contacting the high-temperature flue gas in the flue.

In this embodiment, the installation box 7 is filled with a thermal insulation material or thermal insulation castable 9, specifically, between the installation box 7 and the sleeve 16.

The working principle of the embodiment is as follows: when the working condition of the furnace kiln is greatly changed, the rotating shaft can be rotated electrically or manually to adjust the angle of the guide plate, and different amounts of flue gas impact on the guide plate to be forcibly turned, so that the flue gas is uniformly distributed in the flue and the denitration reactor; compressed air is introduced between the sleeve and the rotating shaft, so that the end close to the bearing forms an air seal, the bearing is isolated from being contacted with high-temperature flue gas in a flue, and the service life of the bearing is prolonged.

It can be understood that the utility model discloses a guide plate still can be used to other all occasions that need flue gas evenly distributed, still can remove the wear-resisting ceramic piece on the guide plate when flue gas dust content is low, wearing and tearing are not serious, singly does the water conservancy diversion usage.

It is obvious that the above are only some embodiments of the present invention, and are not used for limiting the present invention, and for those skilled in the art, the present invention can have the combination and modification of the above various technical features, and those skilled in the art can replace the modifications, equivalents, or use the structure or method of the present invention in other fields to achieve the same effect without departing from the spirit and scope of the present invention, and all belong to the protection scope of the present invention.

Claims

1. An adjustable wear-resistant flue gas flow guide device is characterized by comprising a flow guide plate arranged in a flue, wherein the flow guide plate comprises a flow guide plate body, a rotating shaft and a cooling part, the rotating shaft is connected to the back of the flow guide plate body, two ends of the rotating shaft are connected with a flue wall, and one end of the rotating shaft extends out of the flue wall and is connected with a driving mechanism; and a cooling part is arranged between the flue wall and the rotating shaft.

2. The adjustable abrasion-resistant flue gas flow guiding device of claim 1, wherein the flow guiding plate is arranged on the front side of the denitration reactor and is positioned at a corner of a vertical flue and a horizontal flue which rise in the denitration system.

3. The adjustable abrasion-resistant flue gas guiding device according to claim 2, wherein a plurality of the flow guiding plates are respectively arranged at the corners of the vertical flue and the horizontal flue.

4. The adjustable abrasion-resistant flue gas guiding device according to claim 1, 2 or 3, wherein an abrasion-resistant ceramic block is attached to the front surface of the deflector body; or the guide plate body is directly made of wear-resistant and steel-resistant plates.

5. The adjustable wear-resistant flue gas guiding device according to claim 1, 2 or 3, wherein a mounting box is arranged on the flue wall, a bearing is arranged at the mounting box, and the rotating shaft passes through the bearing and then is fixed by a fastener.

6. The adjustable abrasion resistant flue gas deflector of claim 5, wherein the fastener comprises a gland and a lock nut, the rotating shaft passes through the bearing and the gland and is fixed with the lock nut, and the gland seals the flue wall.

7. The adjustable wear-resistant flue gas guiding device according to claim 1, 2 or 3, wherein the cooling portion comprises a sleeve, the sleeve is arranged on the periphery of the rotating shaft on the inner wall side of the flue, and the sleeve is connected with an air compression device arranged outside through a pipe body and a valve.

8. The adjustable abrasion-resistant flue gas guiding device according to claim 7, wherein the pipe body is communicated with the inter-pipe cavity of the sleeve, and the pipe body is connected with an external air compression device through the mounting box and the outer wall of the flue.

9. The adjustable abrasion-resistant flue gas guiding device according to claim 5, wherein the rotating shaft is further provided with a section of shaft body after passing through the fastener, the section of shaft body is connected with the driving mechanism, and the driving mechanism is an electric actuating mechanism, a handle, a hand wheel or a worm gear driving mechanism.

10. The adjustable wear-resistant flue gas guiding device of claim 5, wherein the mounting box is filled with a thermal insulation material or a thermal insulation castable.