CN211886253U

CN211886253U - SCR reactor soot blower

Info

Publication number: CN211886253U
Application number: CN201922499208.3U
Authority: CN
Inventors: 黄鑫鑫; 黄胜建
Original assignee: Shanghai Qihuang Energy Saving Equipment Co ltd
Current assignee: Shanghai Qihuang Energy Saving Equipment Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-11-10
Anticipated expiration: 2029-12-31

Abstract

The utility model discloses a soot blower of a SCR reactor, which belongs to the field of SCR and comprises a gas storage device, a gas pipe, a heat exchanger, a flexible hose and a blowing mechanism; the blowing mechanism comprises a driving motor, a guide rail, a transmission screw rod, a transmission screw nut, a sliding seat, a blowing branch pipe and a plurality of airflow spray pipes; the transmission screw rod is rotatably connected to the inner wall of the SCR reactor; the driving motor is mechanically connected with the transmission screw rod; the sliding seat is connected on the guide rail in a sliding way and is fixedly connected with the transmission screw nut; the sliding seat is provided with an air outlet, an air inlet and an air flow channel, the other end of the air inlet, which is connected with an air inlet pipe, penetrates through the SCR reactor and is connected with a flexible hose, the air outlet is connected with an air outlet pipe, and the purging branch pipe is connected to the lower end of the air outlet pipe; the plurality of airflow spray pipes are axially distributed on the purging branch pipe at intervals. The utility model has the advantages of simple structure and reasonable design, can effectual improvement sweep the effect and sweep the scope.

Description

SCR reactor soot blower

Technical Field

The utility model relates to a SCR denitration field, in particular to SCR reactor soot blower.

Background

At present, a Selective Catalytic Reduction (SCR) denitration technology is the denitration technology with highest denitration efficiency and the greatest market prospect, and is the first choice for efficiently controlling NOx emission in various industries in China and even internationally. The catalyst is used as a core material of the SCR denitration technology and becomes a direct factor for restricting catalytic reaction. However, when flue gas containing high-concentration and high-viscosity dust passes through the catalyst, it is very easy to agglomerate on the surface thereof, forming bridges and blockages, thereby causing catalyst poisoning, greatly reducing denitration efficiency. In order to prevent the catalyst layer from accumulating dust and improve the denitration efficiency, a dust blowing device is required to be arranged above each layer of catalyst.

In the prior art, a soot blower in an SCR reactor mainly adopts two soot blowing modes, namely compressed air soot blowing, namely steam soot blowing and sound wave soot blower. However, the conventional compressed air is mainly operated by a pulse valve, so that the soot blowing direction and the soot blowing angle are single, the soot blowing area is small, a certain dead angle exists, and if coverage is needed, a large number of soot blowing points need to be arranged. The sound wave soot blower has low soot blowing strength, poor soot blowing effect and low stability.

SUMMERY OF THE UTILITY MODEL

Steam blows the ash direction fixed among the SCR reactor that exists to prior art, blows that the ash area is little to and the sound wave blows the problem that ash intensity is low, poor stability, the utility model aims to provide an SCR reactor soot blower.

In order to achieve the above purpose, the technical scheme of the utility model is that:

a soot blower of an SCR reactor comprises a gas storage device, a gas pipe, a heat exchanger, a flexible hose and a blowing mechanism; one end of the gas pipe is connected with the gas storage device, the other end of the gas pipe is connected with the flexible hose, two ends of a refrigerant of the heat exchanger are connected in series on the gas pipe, and two ends of a heat medium of the heat exchanger are connected in series on the SCR reactor; the blowing mechanism comprises a driving motor, a guide rail, a transmission screw rod, a transmission screw nut, a sliding seat, a blowing branch pipe and a plurality of airflow spray pipes; the guide rails are fixed on two opposite inner walls of the SCR reactor, the transmission screw rod is rotatably connected on the two opposite inner walls of the SCR reactor, the transmission screw rod and the guide rails are horizontal, and the transmission screw rod is parallel to the guide rails; the driving motor is fixedly arranged on the outer wall of the SCR reactor and is mechanically connected with the transmission screw rod; the sliding seat is connected to the guide rail in a sliding mode and is fixedly connected with the transmission nut; the bottom surface of the sliding seat is provided with an air outlet, the side surface of the sliding seat is provided with an air inlet, an air flow channel communicated with the air outlet and the air inlet is arranged in the sliding seat, the air inlet is fixedly connected with an air inlet pipe parallel to the guide rail, the other end of the air inlet pipe penetrates through the outer wall of the SCR reactor and then is connected with the flexible hose, the air outlet is fixedly connected with an air outlet pipe, the air outlet pipe is vertical, the purging branch pipe is connected to the lower end of the air outlet pipe, and the purging branch pipe is horizontal and; the plurality of airflow spray pipes are distributed at intervals along the axial direction of the blowing branch pipe, and the airflow spray pipes are vertical.

As right the utility model discloses a it is further injectd, it still includes the support to sweep the mechanism, driving motor the guide rail with the transmission lead screw is all installed on the support, the support is along being on a parallel with the direction of guide rail with SCR reactor sliding connection, be provided with the confession on the lateral wall of SCR reactor the opening that the support came in and out, be provided with the closure on the support open-ended baffle, the baffle pass through the screw with SCR reactor fixed connection.

As right the utility model discloses a further inject, be provided with the slide rail on the lateral wall of SCR reactor, be provided with on the support with the slider of slide rail looks adaptation.

As a further limitation of the present invention, the plurality of airflow nozzles are equidistantly distributed.

As right the utility model discloses a further inject, the intake pipe with be provided with the sealing washer between the SCR reactor outer wall.

By adopting the technical scheme, due to the arrangement of the transmission screw rod, the guide rail, the sliding seat, the air inlet pipe, the air outlet pipe, the blowing branch pipe and the air flow spraying pipe in the blowing mechanism, firstly, the linearly distributed air flow spraying pipes can clean a catalyst layer in the SCR reactor, and secondly, the blowing branch pipe is driven by the transmission screw rod along with the driving of the driving motor in the moving process, so that the air flow spraying pipes can be driven to blow the catalyst layer on a larger area, and the catalyst layer can be effectively blown and cleaned; and compared with the sonic purging, the air flow purging has better purging strength and stability, thereby ensuring the purging effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a first embodiment of the present invention;

fig. 2 is a schematic view of the second embodiment of the present invention.

In the figure, 1-gas storage device, 2-gas pipe, 3-heat exchanger, 4-flexible hose, 5-purging mechanism, 50-bracket, 51-driving motor, 52-guide rail, 53-driving screw rod, 54-driving screw nut, 55-slide seat, 56-purging branch pipe, 57-gas flow nozzle, 58-gas inlet pipe, 59-gas outlet pipe, 6-SCR reactor and 7-draught fan.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "front", "back", etc. indicate the orientation or position relationship of the structure of the present invention based on the drawings, and are only for the convenience of describing the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the technical scheme, the terms "first" and "second" are only used for referring to the same or similar structures or corresponding structures with similar functions, and are not used for ranking the importance of the structures, or comparing the sizes or other meanings.

In addition, unless expressly stated or limited otherwise, the terms "mounted" and "connected" are to be construed broadly, e.g., the connection may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two structures can be directly connected or indirectly connected through an intermediate medium, and the two structures can be communicated with each other. To those skilled in the art, the specific meanings of the above terms in the present invention can be understood in relation to the present scheme in specific terms according to the general idea of the present invention.

Example one

As shown in fig. 1, a soot blower of an SCR reactor includes a gas storage device 1, a gas pipe 2, a heat exchanger 3, a flexible hose 4, and a purging mechanism 5. The gas storage device 1 is preferably a gas tank, one end of the gas transmission pipe 2 is fixedly connected with the gas storage device 1 through a connecting flange, the other end of the gas transmission pipe is connected with the flexible hose 4 through the connecting flange, and the gas transmission pipe 2 is provided with a control valve for adjusting flow, such as a manual ball valve or an electric gate valve; in this embodiment, the gas pipe 2 is a hard pipe, such as a metal pipe.

The heat exchanger 3 comprises four ports, wherein two refrigerant ports are connected in series to the gas pipe 2, the other two heat medium ports are connected in series to the SCR reactor 6, and when the heat exchanger is connected in series, a refrigerant inlet is connected to the upstream gas inlet side of the gas pipe 2, a heat medium inlet is connected to the upstream side of the flue gas at the upper part of the SCR reactor 6, and for convenience of operation, a control valve is also arranged between the SCR reactor 6 and the heat exchanger 3, in order to enable the flue gas to enter the heat exchanger 3 more smoothly, the induced draft fan 7 is installed on a pipeline connecting the SCR reactor 6 and the heat medium inlet of the heat exchanger 6.

The blowing mechanism 5 comprises a driving motor 51, a guide rail 52, a transmission screw 53, a transmission screw nut 54, a sliding seat 55, a blowing branch pipe 56 and a plurality of air flow nozzles 57.

In this embodiment, the guide rails 52 are fixed on two opposite inner walls of the SCR reactor 6, the driving screw 53 is rotatably connected to the two opposite inner walls of the SCR reactor 6 through a bearing, the driving screw 54 is screwed on the driving screw 53, the driving screw 53 and the guide rails 52 are both horizontally disposed, and the driving screw 53 is parallel to the guide rails 52.

The driving motor 51 is fixedly connected to the outer wall of the SCR reactor 6 through a motor mounting frame, and the driving motor 51 is mechanically connected with a transmission screw rod 53; in this embodiment, one end of the transmission screw 53 passes through the outer wall of the SCR reactor 6 and is connected to the driving motor 51 through a coupler, and the driving motor 51 is preferably a stepping motor or a speed reducing motor in this embodiment.

The slide 55 is slidably connected to the guide rail 52, and in order to prevent the slide 55 from falling off, in this embodiment, the guide rail 52 is preferably T-shaped or dovetail-shaped, and the slide 55 is fixedly connected to the driving nut 54 by a screw or a bolt, so as to slide along the guide rail 52 under the driving of the driving screw 53.

The slide 55 has an air outlet on the bottom, an air inlet on the side, and an air flow passage inside to communicate the air outlet and the air inlet. For air intake, an air inlet pipe 58 parallel to the guide rail 52 is fixedly connected (e.g. screwed) to the air inlet, the air inlet pipe 58 is a rigid pipe, and the other end (free end) of the air inlet pipe passes through the outer wall of the SCR reactor 6 and then is connected to the flexible hose 4, specifically, in this embodiment, a through hole matched with the air inlet pipe 58 is formed in the outer wall of the SCR reactor, the air inlet pipe 58 slides in the through hole under the driving of the slide carriage 55, and in order to keep the air tight seal, a sealing ring is arranged between the air inlet pipe 58 and the outer wall of the SCR reactor 6, specifically, an annular sealing groove is formed in the circumferential inner wall of the through hole, and the sealing ring is installed in the annular sealing.

For air outlet, an air outlet pipe 59 is fixedly connected (for example, in a threaded connection) to the air outlet, the air outlet pipe 59 is vertically arranged, the middle part of the purging branch pipe 56 is connected to the lower end of the air outlet pipe 59, and the purging branch pipe 56 is horizontally arranged and perpendicular to the guide rail 52; the plurality of gas flow nozzles 57 are spaced along the axial direction of the purge branch pipe 56, and the gas flow nozzles 57 are vertically disposed, and preferably, the plurality of gas flow nozzles 57 are spaced at equal intervals in this embodiment.

When the device is used, the SCR reactor 6 works normally to carry out flue gas denitration, and when dust on a catalyst layer in the SCR reactor is more and the working efficiency of the catalyst is influenced; firstly, a control valve on a gas conveying pipe 2 is opened, a gas storage device 1 outputs gas for purging, the gas enters a heat exchanger 3 through the gas conveying pipe, meanwhile, an SCR reactor 6 and the heat exchanger 3 are also communicated, the gas for purging is preheated to a certain temperature, the preheated gas continuously passes through the gas conveying pipe 2, a flexible hose 4 and a gas inlet pipe 58 and then enters a sliding seat 55, and finally passes through a gas outlet pipe 59 and a purging branch pipe 56 and finally is sprayed out from a plurality of gas flow spray pipes 57 which are arranged in a line, the purging operation is carried out on a catalyst layer, and dust on one straight line of the catalyst layer is purged; meanwhile, the motor 51 is driven by a pneumatic power, the driving motor 51 drives the transmission screw rod 53 to rotate, the transmission screw rod 53 drives the transmission screw nut 54 to move axially, the sliding seat 55 is driven by the transmission screw nut 54 to slide along the direction of the guide rail 52, the purging range of the airflow spray pipe 57 is expanded under the drive of the sliding seat 55, and the rectangular purging area is expanded on the catalyst layer, so that the problems that the purging range is small and the purging direction is nonadjustable in the existing steam soot blowing mode are solved; meanwhile, the purging mode with the airflow as the carrier has a more stable and efficient purging effect compared with the sonic purging.

Example two

The difference from the first embodiment is that: as shown in fig. 2, in this embodiment, the purging mechanism 5 further includes a bracket 50, the driving motor 51, the guide rail 52 and the transmission screw 53 are all mounted on the bracket 50, the bracket 50 is slidably connected to the inner wall of the SCR reactor along a direction parallel to the guide rail 52, specifically, the bracket 50 is a rectangular frame, the sliding blocks are disposed on two sides of the bracket 50 perpendicular to the sliding direction, and the sliding rails are correspondingly disposed on the side walls of the SCR reactor; meanwhile, mounting plates are provided on both sides of the bracket 50 parallel to the sliding direction thereof, the guide rail 52 and the feed screw 53 are mounted between the two mounting plates, and the driving motor 51 is mounted on the outer wall of one of the mounting plates, which is generally located outside the SCR reactor.

In order to enable the support 50 to be better inserted and removed, in the embodiment, an opening for inserting and removing the support 50 is provided on the sidewall of the SCR reactor, and a baffle plate for closing the opening is provided on the support 50, and the baffle plate is fixedly connected with the SCR reactor through a screw. In the present embodiment, the baffle is the above-mentioned mounting plate for fixing the driving motor 51.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. The utility model provides a SCR reactor soot blower which characterized in that: comprises a gas storage device, a gas pipe, a heat exchanger, a flexible hose and a purging mechanism; one end of the gas pipe is connected with the gas storage device, the other end of the gas pipe is connected with the flexible hose, two ends of a refrigerant of the heat exchanger are connected in series on the gas pipe, and two ends of a heat medium of the heat exchanger are connected in series on the SCR reactor; the blowing mechanism comprises a driving motor, a guide rail, a transmission screw rod, a transmission screw nut, a sliding seat, a blowing branch pipe and a plurality of airflow spray pipes; the guide rails are fixed on two opposite inner walls of the SCR reactor, the transmission screw rod is rotatably connected on the two opposite inner walls of the SCR reactor, the transmission screw rod and the guide rails are horizontal, and the transmission screw rod is parallel to the guide rails; the driving motor is fixedly arranged on the outer wall of the SCR reactor and is mechanically connected with the transmission screw rod; the sliding seat is connected to the guide rail in a sliding mode and is fixedly connected with the transmission nut; the bottom surface of the sliding seat is provided with an air outlet, the side surface of the sliding seat is provided with an air inlet, an air flow channel communicated with the air outlet and the air inlet is arranged in the sliding seat, the air inlet is fixedly connected with an air inlet pipe parallel to the guide rail, the other end of the air inlet pipe penetrates through the outer wall of the SCR reactor and then is connected with the flexible hose, the air outlet is fixedly connected with an air outlet pipe, the air outlet pipe is vertical, the purging branch pipe is connected to the lower end of the air outlet pipe, and the purging branch pipe is horizontal and; the plurality of airflow spray pipes are distributed at intervals along the axial direction of the blowing branch pipe, and the airflow spray pipes are vertical.

2. The SCR reactor sootblower of claim 1, wherein: the blowing mechanism further comprises a support, the driving motor, the guide rail and the transmission screw rod are installed on the support, the support is parallel to the guide rail and is in sliding connection with the SCR reactor, an opening for the support to come in and go out is formed in the side wall of the SCR reactor, a baffle for sealing the opening is arranged on the support, and the baffle is fixedly connected with the SCR reactor through screws.

3. The SCR reactor sootblower of claim 2, wherein: the side wall of the SCR reactor is provided with a slide rail, and the support is provided with a slide block matched with the slide rail.

4. The SCR reactor sootblower of claim 1, wherein: the airflow spray pipes are distributed at equal intervals.

5. The SCR reactor sootblower of claim 1, wherein: and a sealing ring is arranged between the air inlet pipe and the outer wall of the SCR reactor.