A plate-type air-gas preheater with waste heat recovery

Abstract

The utility model belongs to the technical field of air-gas preheaters, and specifically relates to a plate-type air-gas preheater with waste heat recovery, including a heat exchange box, an air outlet pipe is fixedly connected to the upper end of the heat exchange box, an air inlet pipe is fixedly connected to the back of the heat exchange box, a waste heat recovery box is arranged inside the heat exchange box, and a filter box is fixedly connected to the left end of the heat exchange box, and a filtering mechanism is arranged on the filter box. The utility model adds structures such as a filter box, a filter plate and a camshaft to the heat exchange box, and can filter the airflow through the filter plate inside the filter box during the operation of the heat exchange box, which can effectively reduce the dust from entering the interior of the heat exchange box, thereby avoiding smoke and dust adsorbed on the surface of the waste heat recovery box, and effectively ensuring the heat exchange efficiency. At the same time of filtering, the filter plate can be driven to vibrate through the camshaft, and the vibration can shake off the dust adsorbed on the surface of the filter plate, avoiding the filter plate from being completely blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of air-gas preheaters, in particular to a plate-type air-gas preheater with waste heat recovery. Background Art

[0002] The invention patent with announcement number CN103759288A discloses a plate-type air preheater, including a corrugated plate heat exchange core, an air preheater shell, a flue gas inlet and outlet pipeline, and an air inlet and outlet pipeline. The corrugated plate heat exchange core is formed by stacking multiple sets of plate bundles in a certain form. The plate bundle is welded together by two corrugated plates in the plane area to form an elliptical tubular channel for flue gas. The plate bundles are stacked in the plane area and welded to form an air shell channel. The two media exchange heat in the form of cross-flow. The plate-type air preheater is not only compact in structure and has high heat transfer efficiency, but also resistant to high temperature and high pressure, has a long service life, is easy to process, and has low cost. Compared with the tube-type and fin-tube air preheaters, the flue gas of the new plate-type air preheater goes through an elliptical straight channel, has low flow resistance, is not easily stained with dust, and is easy to clean even if it is stained with dust.

[0003] However, the existing plate-type air preheater recovers waste heat from flue gas during use, but the flue gas contains a certain amount of dust. The dust adsorbed on the heat exchange surface of the waste heat recovery device will affect the heat exchange efficiency and quality of the heat exchanger. In addition, during the heat exchange process, the heat is easily dissipated to the outside through the heat exchange box, resulting in excessive heat consumption. Therefore, improvements are needed. Utility Model Content

[0004] The utility model aims to provide a plate-type air-gas preheater with waste heat recovery, which solves the problem that dust affects the heat exchange efficiency and heat is easily dissipated to the outside and causes waste.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a plate-type air-gas preheater with waste heat recovery, comprising a heat exchange box, the upper end of the heat exchange box is fixedly connected with an air outlet pipe, the back of the heat exchange box is fixedly connected with an air inlet pipe, a waste heat recovery box is arranged inside the heat exchange box, the left end of the heat exchange box is fixedly connected with a filter box, the filter mechanism is arranged on the filter box, the right end of the heat exchange box is fixedly connected with a smoke exhaust pipe, the outer side of the heat exchange box is fixedly connected with a vacuum insulation cover, the upper end of the vacuum insulation cover is fixedly connected with an exhaust pipe, the middle part of the inner wall of the exhaust pipe is fixedly connected with a fixing ring, the inner part of the fixing ring is slidably connected with a sealing plug, the lower end of the sealing plug is fixedly connected with a connecting nail, a spring is arranged on the outer side of the connecting nail, and a fixing strip is fixedly connected to the lower part of the inner wall of the exhaust pipe.

[0006] Preferably, the waste heat recovery box is fixedly connected to both the air inlet pipe and the air outlet pipe, and the vacuum insulation cover is fixedly connected to both the air inlet pipe and the air outlet pipe, and the air inlet pipe can supply air and gas to the interior of the waste heat recovery box.

[0007] Preferably, the fixing strip is slidably connected to the connecting nail, one end of the spring one is fixedly connected to the fixing strip, and the other end of the spring one is fixedly connected to the connecting nail, and the spring one can drive the connecting nail to automatically reset through elastic force.

[0008] Preferably, the filtering mechanism includes a filter plate, the filter plate is slidably connected to the inside of the filter box, the outside of the filter plate is fixedly connected to a support frame, the inside of the support frame is slidably connected to a guide rod, the outside of the guide rod is provided with a spring 2, a camshaft is installed inside the filter box through a bearing, two symmetrically distributed arc blocks are fixedly connected to one side of the filter plate close to the camshaft, a motor is installed on the upper end of the filter box, a sealing sleeve is fixedly connected to the inside of the filter box, and the camshaft repeatedly impacts the arc block during rotation.

[0009] Preferably, one end of the second spring is fixedly connected to the support frame, and the other end of the second spring is fixedly connected to the filter box, and the second spring can support the support frame through elastic force.

[0010] Preferably, the sealing sleeve is rotatably connected to the camshaft, the lower end of the output shaft of the motor is fixedly connected to the upper end of the camshaft, the cam of the camshaft contacts the arc block, and the sealing sleeve can seal the connection between the camshaft and the filter box.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The utility model adds structures such as a filter box, a filter plate and a camshaft to the heat exchange box. During the operation of the heat exchange box, the airflow can be filtered by the filter plate inside the filter box, which can effectively reduce the dust from entering the interior of the heat exchange box, thereby preventing smoke from being adsorbed on the surface of the waste heat recovery box, effectively ensuring the heat exchange efficiency, and at the same time, the filter plate can be driven to vibrate by the camshaft, and the vibration can shake off the dust adsorbed on the surface of the filter plate, avoiding the filter plate from being completely blocked.

[0013] 2. The utility model has a vacuum insulation cover, an exhaust pipe, a sealing plug and other structures on the outside of the heat exchange box. During use, the vacuum insulation cover can be evacuated through the exhaust pipe. After the vacuum insulation cover is evacuated, the heat exchange box can be insulated, which can reduce heat loss and effectively avoid heat waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall structure of the utility model is three-dimensional Figure 1 ;

[0015] Figure 2 The overall structure of the utility model is three-dimensional Figure 2 ;

[0016] Figure 3 For this utility model Figure 2 A three-dimensional diagram of an intake pipe;

[0017] Figure 4 For the utility model Figure 2 A front enlarged cross-sectional view of a filter box;

[0018] Figure 5 For the utility model Figure 1 An enlarged front cross-sectional view of the exhaust pipe.

[0019] In the figure: 1. heat exchange box; 2. exhaust pipe; 3. intake pipe; 4. waste heat recovery box; 5. filter box; 6. filter mechanism; 7. exhaust pipe; 8. vacuum insulation cover; 9. exhaust pipe; 10. fixing ring; 11. sealing plug; 12. connecting nail; 13. spring one; 14. fixing strip; 61. filter plate; 62. support frame; 63. guide rod; 64. spring two; 65. camshaft; 66. arc block; 67. motor; 68. sealing sleeve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 , Figure 2 , Figure 3 , Figure 5A plate-type air-gas preheater with waste heat recovery comprises a heat exchange box 1, an air outlet pipe 2 is fixedly connected to the upper end of the heat exchange box 1, an air inlet pipe 3 is fixedly connected to the back of the heat exchange box 1, a waste heat recovery box 4 is arranged inside the heat exchange box 1, a filter box 5 is fixedly connected to the left end of the heat exchange box 1, a filter mechanism 6 is arranged on the filter box 5, a smoke exhaust pipe 7 is fixedly connected to the right end of the heat exchange box 1, a vacuum insulation cover 8 is fixedly connected to the outer side of the heat exchange box 1, an exhaust pipe 9 is fixedly connected to the upper end of the vacuum insulation cover 8, a fixing ring 10 is fixedly connected to the middle part of the inner wall of the exhaust pipe 9, a sealing plug 11 is slidably connected to the inside of the fixing ring 10, a connecting nail 12 is fixedly connected to the lower end of the sealing plug 11, a spring 13 is arranged on the outer side of the connecting nail 12, and a fixing strip 14 is fixedly connected to the lower part of the inner wall of the exhaust pipe 9.

[0022] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 The waste heat recovery box 4 is fixedly connected to the air inlet pipe 3 and the air outlet pipe 2, the vacuum insulation cover 8 is fixedly connected to the air inlet pipe 3 and the air outlet pipe 2, the air inlet pipe 3 can add air and gas to the interior of the waste heat recovery box 4, the fixing strip 14 is slidably connected to the connecting nail 12, one end of the spring 13 is fixedly connected to the fixing strip 14, and the other end of the spring 13 is fixedly connected to the connecting nail 12, and the spring 13 can drive the connecting nail 12 to automatically reset through elastic force.

[0023] See also Figure 1 , Figure 2 , Figure 4 The filtering mechanism 6 includes a filter plate 61, the filter box 5 is slidably connected with the filter plate 61, the outer side of the filter plate 61 is fixedly connected with a support frame 62, the support frame 62 is slidably connected with a guide rod 63, the outer side of the guide rod 63 is provided with a second spring 64, the filter box 5 is installed with a camshaft 65 through a bearing, the filter plate 61 is fixedly connected to one side of the camshaft 65 with two symmetrically distributed arc blocks 66, the upper end of the filter box 5 is installed with a motor 67, the filter box 5 is fixedly connected with a sealing sleeve 68, the camshaft 65 repeatedly impacts the arc block 66 during rotation, one end of the second spring 64 is fixedly connected to the support frame 62, the other end of the second spring 64 is fixedly connected to the filter box 5, the second spring 64 can support the support frame 62 through elastic force, the sealing sleeve 68 is rotatably connected to the camshaft 65, the lower end of the output shaft of the motor 67 is fixedly connected to the upper end of the camshaft 65, the cam of the camshaft 65 contacts the arc block 66, and the sealing sleeve 68 can seal the connection between the camshaft 65 and the filter box 5.

[0024] The specific implementation process of the utility model is as follows: when in use, insert the connecting pipe of the vacuum pump into the interior of the exhaust pipe 9, and then start the vacuum pump, the vacuum pump generates suction, when the suction is greater than the elastic force of the spring 13, the sealing plug 11 moves, and when the sealing plug 11 is separated from the fixing ring 10, the interior of the cavity of the vacuum insulation cover 8 can be evacuated, and after the vacuuming is completed, the connecting pipe of the vacuum pump is evacuated from the exhaust pipe 9, and the spring 13 is reset after evacuation. The spring 13 can drive the sealing plug 11 to automatically reset through the elastic force, and the sealing plug 11 can block the exhaust pipe 9. The vacuum insulation cover 8 after vacuum can isolate the heat generated by the heat exchange box 1, thereby achieving the purpose of keeping the heat exchange box 1 warm;

[0025] When it is necessary to recover the waste heat of the flue gas, the flue gas enters the interior of the filter box 5 and is filtered by the filter plate 61 before entering the interior of the heat exchange box 1. Heat is exchanged with the waste heat recovery box 4 inside the heat exchange box 1, and the gas inside the waste heat recovery box 4 is preheated. In the process of the filter plate 61 filtering the flue gas, the motor 67 is started, and the motor 67 drives the camshaft 65 to rotate. During the rotation, the camshaft 65 repeatedly impacts the arc block 66. During the impact, the support frame 62 on the outside of the filter plate 61 can be driven to compress and release the spring 2 64, so that the filter plate 61 can vibrate. The filter plate 61 can vibrate the dust accumulated on the outside away from the filter plate 61, which can effectively prevent the dust from being adsorbed on the surface of the waste heat recovery box 4.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plate-type air-gas preheater with waste heat recovery, comprising a heat exchange box (1), characterized in that: The upper end of the heat exchange box (1) is fixedly connected to an air outlet pipe (2), the back of the heat exchange box (1) is fixedly connected to an air inlet pipe (3), a waste heat recovery box (4) is arranged inside the heat exchange box (1), the left end of the heat exchange box (1) is fixedly connected to a filter box (5), a filter mechanism (6) is arranged on the filter box (5), the right end of the heat exchange box (1) is fixedly connected to a smoke exhaust pipe (7), and the outer side of the heat exchange box (1) is fixedly connected to a vacuum insulation A cover (8), the upper end of the vacuum insulation cover (8) is fixedly connected to an exhaust pipe (9), the middle part of the inner wall of the exhaust pipe (9) is fixedly connected to a fixing ring (10), the interior of the fixing ring (10) is slidably connected to a sealing plug (11), the lower end of the sealing plug (11) is fixedly connected to a connecting pin (12), a spring (13) is arranged on the outer side of the connecting pin (12), and the lower part of the inner wall of the exhaust pipe (9) is fixedly connected to a fixing strip (14).

2. A plate-type air-gas preheater with waste heat recovery according to claim 1, characterized in that: The waste heat recovery box (4) is fixedly connected to both the air inlet pipe (3) and the air outlet pipe (2), and the vacuum heat-insulating cover (8) is fixedly connected to both the air inlet pipe (3) and the air outlet pipe (2).

3. The plate-type air-gas preheater with waste heat recovery according to claim 1, characterized in that: The fixing strip (14) is slidably connected to the connecting pin (12), one end of the spring 1 (13) is fixedly connected to the fixing strip (14), and the other end of the spring 1 (13) is fixedly connected to the connecting pin (12).

4. The plate-type air-gas preheater with waste heat recovery according to claim 1, characterized in that: The filtering mechanism (6) comprises a filter plate (61), the filter plate (61) is slidably connected inside the filter box (5), the outer side of the filter plate (61) is fixedly connected to a support frame (62), the inner side of the support frame (62) is slidably connected to a guide rod (63), the outer side of the guide rod (63) is provided with a second spring (64), the inner side of the filter box (5) is installed with a camshaft (65) via a bearing, the side of the filter plate (61) close to the camshaft (65) is fixedly connected with two symmetrically distributed arc blocks (66), the upper end of the filter box (5) is installed with a motor (67), and the inner side of the filter box (5) is fixedly connected with a sealing sleeve (68).

5. The plate-type air-gas preheater with waste heat recovery according to claim 4, characterized in that: One end of the second spring (64) is fixedly connected to the support frame (62), and the other end of the second spring (64) is fixedly connected to the filter box (5).

6. The plate-type air-gas preheater with waste heat recovery according to claim 4, characterized in that: The sealing sleeve (68) is rotatably connected to the camshaft (65), the lower end of the output shaft of the motor (67) is fixedly connected to the upper end of the camshaft (65), and the cam of the camshaft (65) is in contact with the circular arc block (66).

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