Flow guide device of air preheater

Abstract

The utility model provides a flow guide device of an air preheater, which comprises a flow guide pipe, an air inlet pipe is arranged at the top of the flow guide pipe, the bottom of the air inlet pipe is fixedly connected with the top of the flow guide pipe in a penetrating manner, and a smoke inlet pipe is arranged at the top of one end of the flow guide pipe close to the air inlet pipe. The bottom of the smoke inlet pipe is fixedly connected with the top of the flow guide pipe in a penetrating mode, an exchange inner cavity is formed in the flow guide pipe, and the part, located in the exchange inner cavity, of the smoke inlet pipe is arranged in a winding mode. The flow guide pipe can be installed at a proper position in the air preheater through the fixing flange, then the air conveying pipe is connected with the air inlet pipe, the exhaust pipe is connected with the pipeline, the smoke inlet pipe is connected with the smoke conveying pipeline, the smoke exhaust pipe is connected with the recycling pipeline, heat exchange is conducted on the air inlet pipe through the smoke inlet pipe arranged in a surrounding mode, and the heat exchange efficiency is improved. Therefore, the air cleanliness is ensured, and the flow guide operation is completed.

Description

Technical Field

[0001] The utility model is a flow guiding device for an air preheater, and relates to the field of preheaters. Background Art

[0002] An air preheater is a heating surface that preheats the flue gas in the flue at the tail end of the boiler to a certain temperature through the internal heat sink. It is a device used to improve the heat exchange performance of the boiler and reduce energy consumption. In the prior art, most of the guide devices in air preheaters use motors to drive the heat exchange equipment to rotate to complete the heat exchange operation between hot flue gas and cold air. When these heat exchange devices rotate, if the internal sealing effect is not good, the flue gas and air will be mixed, resulting in residues in the mixed gas, which reduces the purity of the air. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a flow guide device for an air preheater. The flow guide pipe can be installed at a suitable position in the air preheater through a fixed flange, and then the air delivery pipe is connected to the air intake pipe, the exhaust pipe is connected to the pipeline, the smoke intake pipe is connected to the smoke delivery pipeline, and the smoke exhaust pipe is connected to the recovery pipeline. The air intake pipe is heat exchanged through the surrounding smoke intake pipe, thereby ensuring the air cleanliness while completing the flow guide operation to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model is implemented through the following technical scheme: a flow guide device for an air preheater, including a flow guide pipe, an air inlet pipe is arranged on the top of the flow guide pipe, the bottom of the air inlet pipe is fixedly connected to the top of the flow guide pipe, a smoke inlet pipe is arranged on the top of the flow guide pipe near one end of the air inlet pipe, the bottom of the smoke inlet pipe is fixedly connected to the top of the flow guide pipe, an exchange inner cavity is opened inside the flow guide pipe, and the part of the smoke inlet pipe in the exchange inner cavity is arranged to be wrapped around the air inlet pipe.

[0005] Furthermore, an exhaust pipe is provided at the bottom of the guide pipe, the top of the exhaust pipe passes through the guide pipe and is fixedly connected to the bottom of the intake pipe, and an exhaust valve is provided at the bottom end of the exhaust pipe.

[0006] Furthermore, a smoke exhaust pipe is provided at the bottom of the guide pipe near one end of the exhaust pipe, the top of the smoke exhaust pipe passes through the guide pipe and is fixedly connected to the bottom of the smoke inlet pipe, and a smoke exhaust valve is provided at the bottom of the smoke exhaust pipe.

[0007] Furthermore, an air intake valve is provided at the top end of the air intake pipe, and a smoke intake valve is provided at the top end of the smoke intake pipe.

[0008] Furthermore, the inner wall of the exchange inner cavity is coated with a metal plating layer, and the inner wall of the exchange inner cavity is fixedly connected with a temperature sensor.

[0009] Furthermore, the bottom outer wall and the top outer wall of the guide tube are both fixedly connected with fixed flanges, and the outer wall of the guide tube is fixedly connected with a controller.

[0010] The beneficial effects of the utility model are as follows: the guide pipe can be installed at a suitable position in the air preheater through the fixed flange, and then the air delivery pipe is connected to the air intake pipe, the exhaust pipe is connected to the pipeline, the smoke intake pipe is connected to the smoke delivery pipeline, and the smoke exhaust pipe is connected to the recovery pipeline. The air intake pipe is heat exchanged through the surrounding smoke intake pipe, thereby ensuring the air cleanliness while completing the guide operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0012] Figure 1 This is a schematic diagram of the main structure of a flow guide device for an air preheater according to the utility model;

[0013] Figure 2 It is a schematic cross-sectional structure diagram of a flow guide pipe in a flow guide device of an air preheater according to the utility model;

[0014] Figure 3 The utility model is a schematic diagram of the installation of an air inlet pipe and a smoke inlet pipe in a flow guide device of an air preheater.

[0015] In the figure: 1- flow guide pipe, 2- fixing flange, 3- air inlet pipe, 4- air inlet valve, 5- smoke inlet pipe, 6- smoke inlet valve, 7- controller, 8- smoke exhaust pipe, 9- smoke exhaust valve, 10- exhaust pipe, 11- exhaust valve, 12- exchange inner cavity, 13- metal coating, 14- temperature sensor. DETAILED DESCRIPTION

[0016] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0017] See also Figures 1 to 3The utility model provides a technical solution: a flow guide device for an air preheater, comprising a flow guide pipe 1, an air inlet pipe 3 is arranged on the top of the flow guide pipe 1, the bottom of the air inlet pipe 3 is fixedly connected to the top of the flow guide pipe 1, a smoke inlet pipe 5 is arranged on the top of the flow guide pipe 1 near one end of the air inlet pipe 3, the bottom of the smoke inlet pipe 5 is fixedly connected to the top of the flow guide pipe 1, an exchange inner cavity 12 is opened inside the flow guide pipe 1, and the part of the smoke inlet pipe 5 in the exchange inner cavity 12 is arranged to be wrapped around the air inlet pipe 3.

[0018] Preferably, in the present embodiment, the winding distance of the smoke inlet pipe 5 around the air inlet pipe 3 can be set according to the temperature of the hot smoke inside the smoke inlet pipe 5, so as to ensure the guiding effect of the smoke inlet pipe 5 on the air inlet pipe 3. At the same time, in the present embodiment, the air inlet pipe 3 and the smoke inlet pipe 5 are both made of materials with high thermal conductivity coefficient.

[0019] Furthermore, an exhaust pipe 10 is provided at the bottom of the air guide pipe 1 , and the top of the exhaust pipe 10 passes through the air guide pipe 1 and is fixedly connected to the bottom of the air intake pipe 3 . An exhaust valve 11 is provided at the bottom end of the exhaust pipe 10 .

[0020] Furthermore, a smoke exhaust pipe 8 is provided at the bottom of the guide pipe 1 near one end of the exhaust pipe 10 , the top of the smoke exhaust pipe 8 passes through the guide pipe 1 and is fixedly connected to the bottom of the smoke inlet pipe 5 , and a smoke exhaust valve 9 is provided at the bottom of the smoke exhaust pipe 8 .

[0021] Preferably, in this embodiment, the air after the heat exchange is discharged through the exhaust pipe 10, and at the same time, the conductance of the exhaust pipe 10 is controlled by the exhaust valve 11, and the smoke after the exchange is discharged through the smoke exhaust pipe 8, and the conductance of the smoke exhaust pipe 8 is controlled by the smoke exhaust valve 9.

[0022] Furthermore, an air intake valve 4 is provided at the top end of the air intake pipe 3 , and a smoke intake valve 6 is provided at the top end of the smoke intake pipe 5 .

[0023] Furthermore, the inner wall of the exchange inner cavity 12 is coated with a metal coating 13 , and the inner wall of the exchange inner cavity 12 is fixedly connected with a temperature sensor 14 .

[0024] Preferably, the temperature in the exchange cavity 12 is protected by the metal coating 13 , and at the same time, the operating temperature in the exchange cavity 12 is monitored by the temperature sensor 14 .

[0025] Furthermore, the bottom outer wall and the top outer wall of the flow guide pipe 1 are both fixedly connected with a fixing flange 2 , and the outer wall of the flow guide pipe 1 is fixedly connected with a controller 7 .

[0026] Specific implementation method: When using this device, it is only necessary to install the guide pipe 1 to a suitable position in the air preheater through the fixing flange 2, and then connect the air inlet pipe 3, the smoke inlet pipe 5, the smoke exhaust pipe 8 and the exhaust pipe 10 to the corresponding pipes inside the air preheater respectively.

[0027] When working, open the air inlet valve 4 and the smoke inlet valve 6, introduce cold air through the air inlet pipe 3, introduce hot smoke through the smoke inlet pipe 5, and complete heat exchange with the cold air through the smoke inlet pipe 5 wrapped around the outside of the air inlet pipe 3, so that the gas temperature in the two pipes reaches equilibrium, completing the diversion operation.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A flow guide device for an air preheater, comprising a flow guide pipe (1), characterized in that: An air inlet pipe (3) is arranged at the top of the guide pipe (1), the bottom of the air inlet pipe (3) is penetrated and fixedly connected to the top of the guide pipe (1), a smoke inlet pipe (5) is arranged at the top of the guide pipe (1) close to one end of the air inlet pipe (3), the bottom of the smoke inlet pipe (5) is penetrated and fixedly connected to the top of the guide pipe (1), an exchange inner cavity (12) is opened inside the guide pipe (1), and the part of the smoke inlet pipe (5) in the exchange inner cavity (12) is arranged to be wound around the air inlet pipe (3).

2. The flow guide device of an air preheater according to claim 1, characterized in that: An exhaust pipe (10) is arranged at the bottom of the flow guide pipe (1); the top of the exhaust pipe (10) passes through the flow guide pipe (1) and is fixedly connected to the bottom of the air intake pipe (3); and an exhaust valve (11) is arranged at the bottom end of the exhaust pipe (10).

3. The flow guide device of an air preheater according to claim 1, characterized in that: A smoke exhaust pipe (8) is arranged at the bottom of the flow guide pipe (1) near one end of the exhaust pipe (10); the top of the smoke exhaust pipe (8) passes through the flow guide pipe (1) and is fixedly connected to the bottom of the smoke inlet pipe (5); and a smoke exhaust valve (9) is arranged at the bottom end of the smoke exhaust pipe (8).

4. The flow guide device of an air preheater according to claim 1, characterized in that: An air intake valve (4) is provided at the top end of the air intake pipe (3), and a smoke intake valve (6) is provided at the top end of the smoke intake pipe (5).

5. The flow guide device of an air preheater according to claim 1, characterized in that: The inner wall of the exchange inner cavity (12) is coated with a metal coating (13), and a temperature sensor (14) is fixedly connected to the inner wall of the exchange inner cavity (12).

6. The flow guide device of an air preheater according to claim 1, characterized in that: The bottom outer wall and the top outer wall of the flow guide pipe (1) are both fixedly connected to a fixed flange (2), and the outer wall of the flow guide pipe (1) is fixedly connected to a controller (7).

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