Waste heat recovery mechanism for thermal power generation

Abstract

The utility model discloses a waste heat recovery mechanism for thermal power generation, which comprises a recovery box, two smoke inlet pipes are arranged at the bottom of the recovery box, a guide assembly is arranged at the bottom of the inner side of the recovery box, the guide assembly comprises a guide cover, and the guide cover covers the outer part of the top end of each smoke inlet pipe. A recycling assembly is arranged on the top of the inner side of the recycling box and comprises a recycling base, a smoke guide groove, a step and a heat exchange water pipe. When waste heat recovery is carried out, smoke enters the guide assembly from the smoke inlet pipe, is guided by the guide assembly to rise to the smoke guide groove, then is guided by the smoke guide groove to gradually drift downwards along the step and carries out heat exchange with the heat exchange water pipe on the step, waste heat recovery is completed, and finally smoke is discharged from the smoke outlet pipe. Smoke can stay near the heat exchange water pipe for a long time, heat exchange is fully completed, the heat loss degree is small, and heat waste is effectively reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal power generation, and specifically relates to a waste heat recovery mechanism for thermal power generation. Background Art

[0002] A large amount of high-temperature flue gas will be generated in thermal power generation, and the heat in the flue gas needs to be recycled. After searching, a Chinese patent application with application number CN202123143440.7 records a thermal power generation waste heat recovery device with low energy dissipation. In this patent, through the designed buffer mechanism and waste heat recovery mechanism and other components, the time that the smoke stays in the mechanism can be extended, thereby completing more heat recovery.

[0003] However, the above patent still has certain shortcomings in actual use. The heat in the flue gas can only be recovered in the heat exchange chamber, and the setting of the buffer mechanism only prolongs the time that the flue gas stays in the pipe. The heat cannot be recovered inside the pipe. The longer pipe design causes a large amount of heat to be lost inside the pipe, resulting in heat waste. Therefore, it is necessary to design a new waste heat recovery mechanism to solve this problem. Utility Model Content

[0004] The purpose of the utility model is to provide a waste heat recovery mechanism for thermal power generation, so as to solve the problem that a large amount of heat in the flue gas will be lost inside the pipeline in the cited patents proposed in the above background technology, resulting in heat waste.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a waste heat recovery mechanism for thermal power generation, comprising a recovery box, two smoke inlet pipes are arranged at the bottom of the recovery box, a guide assembly is arranged at the inner bottom of the recovery box, the guide assembly comprises a guide cover, the guide cover covers the top outside of the smoke inlet pipe, a recovery assembly is arranged at the inner top of the recovery box, the recovery assembly comprises a recovery seat, a smoke guide groove, a step and a hot water exchange pipe, the smoke guide groove is opened in the middle of the bottom surface of the recovery seat and is located directly above the guide cover, the step is symmetrically opened on both sides of the smoke guide groove and extends downward, the hot water exchange pipe is fixed on the step, and smoke outlet pipes are symmetrically arranged at both sides of the recovery box at the bottom end of the step.

[0006] Preferably, the recovery component further comprises an inner cavity, and the inner cavity is opened inside the recovery seat.

[0007] Preferably, the recovery component further comprises an asbestos filling pad, and the asbestos filling pad is arranged inside the inner cavity.

[0008] Preferably, an installation component is arranged between the two sides of the recycling seat and the inner wall of the recycling box, and the installation component includes a mounting bar fixed on the surface of the recycling seat, and a mounting groove opened on the inner wall of the recycling box and slidably connected to the mounting bar, and the top end of the mounting groove is open and the bottom end is closed.

[0009] Preferably, a top cover is connected to the top of the recovery box, a squeezing pile which is in squeezing contact with the top of the recovery seat is fixed to the bottom of the top cover, and lifting ears are symmetrically fixed to the top of the recovery seat.

[0010] Preferably, the guide assembly also includes a filter screen cover, a receiving tray and bolts, the filter screen cover is fixed to the inner side of the top end of the guide cover, the receiving tray is arranged on the inner bottom surface of the recovery box and is located directly below the filter screen cover, and the bolts fix the guide cover to the bottom of the recovery box.

[0011] Preferably, the guide assembly further comprises a plugging pile, which is fixed to the bottom of the receiving tray and plugged into a plugging hole provided on the inner bottom surface of the recycling box, and a movable door is provided on the surface of the recycling box on one side of the guide assembly.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] When recovering waste heat, the smoke enters the guide component from the smoke inlet pipe, and is guided by the guide component to rise to the smoke guide groove, and then is guided by the smoke guide groove to gradually drift downward along the steps, and exchanges heat with the hot water exchange pipes on the steps to complete waste heat recovery, and finally the smoke is discharged from the smoke outlet pipe. The advantage of this design is that the smoke can stay near the hot water exchange pipe for a long time, fully completing the heat exchange, and the degree of heat loss is small, effectively reducing heat waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front cross-sectional view of the utility model;

[0015] Figure 2 For this utility model Figure 1 A front cross-sectional view of the recovery assembly;

[0016] Figure 3 For this utility model Figure 1 A front cross-sectional view of the mounting assembly;

[0017] Figure 4 For this utility model Figure 1 a front sectional view of the middle guide assembly;

[0018] In the figure: 100, recovery box; 200, guide assembly; 201, guide cover; 202, filter screen cover; 203, receiving tray; 204, plug pile; 205, bolt; 300, smoke inlet pipe; 400, recovery assembly; 401, recovery seat; 402, smoke guide groove; 403, step; 404, hot water exchange pipe; 405, inner cavity; 406, asbestos filling pad; 500, smoke outlet pipe; 600, top cover; 700, installation assembly; 701, installation strip; 702, installation groove; 800, lifting ear; 900, extrusion pile. DETAILED DESCRIPTION

[0019] 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.

[0020] Example

[0021] See also Figures 1 to 4 , is an embodiment of the utility model, and this embodiment provides a technical solution: a waste heat recovery mechanism for thermal power generation, including a recovery box 100, two smoke inlet pipes 300 are arranged at the bottom of the recovery box 100, and the smoke can enter the interior of the recovery box 100 from the smoke inlet pipes 300, and a guide assembly 200 is arranged at the inner bottom of the recovery box 100, and the guide assembly 200 includes a guide cover 201, and the guide cover 201 covers the top outside of the smoke inlet pipe 300. The incoming smoke is gathered through the guide cover 201 and discharged from the top of the guide cover 201. A recovery assembly 400 is arranged on the inner top of the recovery box 100, which can recover the waste heat. The recovery assembly 400 includes a recovery seat 401, a smoke guide groove 402, a step 403 and a hot water exchange pipe 404, and the smoke guide groove 402 is opened in the middle of the bottom surface of the recovery seat 401 and is located directly above the guide cover 201. The smoke exhausted from the guide cover 201 will gather in the smoke guide groove 402. The steps 403 are symmetrically opened on both sides of the smoke guide groove 402 and extend downward. The smoke gathered in the smoke guide groove 402 will gradually drift downward along the steps 403. Due to the downward direction, the drifting speed is relatively slow, thereby extending the time that the smoke stays near the steps 403. The hot water exchange pipe 404 is fixed on the steps 403. The smoke staying near the steps 403 exchanges heat with the hot water exchange pipe 404, thereby completing the recovery of waste heat. Smoke outlet pipes 500 are symmetrically arranged on both sides of the recovery box 100 at the bottom end of the steps 403, and the smoke after waste heat recovery is finally discharged from the smoke outlet pipes 500.

[0022] In this embodiment, preferably, the recovery component 400 also includes an inner cavity 405, which is opened inside the recovery seat 401. The recovery component 400 also includes an asbestos filling pad 406, which is arranged inside the inner cavity 405. The design of the inner cavity 405 and the asbestos filling pad 406 can slow down the heat loss at the recovery component 400, so that more heat can be exchanged with the hot water exchange pipe 404.

[0023] In this embodiment, preferably, an installation component 700 is arranged between the two sides of the recycling seat 401 and the inner wall of the recycling box 100, and the installation component 700 includes a mounting bar 701 fixed on the surface of the recycling seat 401, and a mounting groove 702 opened on the inner wall of the recycling box 100 and slidably connected to the mounting bar 701. The mounting groove 702 is open at the top and closed at the bottom. The mounting bar 701 can be inserted into the interior of the mounting groove 702 from top to bottom to complete the installation of the recycling component 400. The personnel can also perform the reverse operation to remove the recycling component 400.

[0024] In this embodiment, preferably, a top cover 600 is connected to the top of the recycling box 100, and the top cover 600 can be opened. An extrusion pile 900 is fixed to the bottom of the top cover 600 and is in extrusion contact with the top of the recycling seat 401 to ensure stable installation of the recycling component 400. Lifting ears 800 are symmetrically fixed to the top of the recycling seat 401 to facilitate removing the recycling component 400 from the interior of the recycling box 100.

[0025] In this embodiment, preferably, the guide assembly 200 also includes a filter screen cover 202, a receiving tray 203 and bolts 205. The filter screen cover 202 is fixed to the inner side of the top end of the guide cover 201 and can filter the smoke. The receiving tray 203 is arranged on the inner bottom surface of the recycling box 100 and is located directly below the filter screen cover 202. After the solid matter in the smoke is intercepted by the filter screen cover 202, some of it will fall down and can be received by the receiving tray 203. The bolts 205 fix the guide cover 201 to the bottom of the recycling box 100.

[0026] In this embodiment, preferably, the guide component 200 also includes a stake 204, which is fixed to the bottom of the receiving tray 203 and inserted into the inside of the socket opened on the inner bottom surface of the recycling box 100. The surface of the recycling box 100 is located on one side of the guide component 200 and is provided with a movable door. The movable door can be opened to take out the guide cover 201, the receiving tray 203 and other components for cleaning.

[0027] Although the embodiments of the present invention have been shown and described (see the above detailed description for details), it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery mechanism for thermal power generation, comprising a recovery box (100), characterized in that: Two smoke inlet pipes (300) are arranged at the bottom of the recovery box (100); a guide assembly (200) is arranged at the inner bottom of the recovery box (100); the guide assembly (200) comprises a guide cover (201); the guide cover (201) covers the top of the smoke inlet pipe (300); a recovery assembly (400) is arranged at the inner top of the recovery box (100); the recovery assembly (400) comprises a recovery seat (401), a smoke guide groove (401), and a guide cover (201) disposed on the outer top of the smoke inlet pipe (300). 2), a step (403) and a hot water exchange pipe (404), the smoke guide groove (402) is opened in the middle of the bottom surface of the recovery seat (401) and is located directly above the guide cover (201), the step (403) is symmetrically opened on both sides of the smoke guide groove (402) and extends downward, the hot water exchange pipe (404) is fixed on the step (403), and smoke outlet pipes (500) are symmetrically arranged on both sides of the recovery box (100) at the bottom end of the step (403).

2. A waste heat recovery mechanism for thermal power generation according to claim 1, characterized in that: The recovery component (400) further comprises an inner cavity (405), wherein the inner cavity (405) is opened inside the recovery seat (401).

3. A waste heat recovery mechanism for thermal power generation according to claim 2, characterized in that: The recovery component (400) further comprises an asbestos filling pad (406), wherein the asbestos filling pad (406) is arranged inside the inner cavity (405).

4. The waste heat recovery mechanism for thermal power generation according to claim 1, characterized in that: A mounting assembly (700) is arranged between the two sides of the recycling seat (401) and the inner wall of the recycling box (100), and the mounting assembly (700) comprises a mounting strip (701) fixed to the surface of the recycling seat (401), and a mounting groove (702) opened on the inner wall of the recycling box (100) and slidably connected to the mounting strip (701), wherein the mounting groove (702) has an open top and a closed bottom.

5. A waste heat recovery mechanism for thermal power generation according to claim 4, characterized in that: The top of the recovery box (100) is connected to a top cover (600), the bottom of the top cover (600) is fixed with a squeezing pile (900) which is in squeezing contact with the top of the recovery seat (401), and the top of the recovery seat (401) is symmetrically fixed with a lifting ear (800).

6. A waste heat recovery mechanism for thermal power generation according to claim 1, characterized in that: The guide assembly (200) further comprises a filter screen cover (202), a material receiving tray (203) and a bolt (205); the filter screen cover (202) is fixed to the inner side of the top end of the guide cover (201); the material receiving tray (203) is arranged on the inner bottom surface of the recovery box (100) and is located directly below the filter screen cover (202); and the bolt (205) fixes the guide cover (201) to the bottom of the recovery box (100).

7. A waste heat recovery mechanism for thermal power generation according to claim 6, characterized in that: The guide assembly (200) further comprises a plugging stake (204), the plugging stake (204) being fixed to the bottom of the receiving tray (203) and plugged into a plug hole provided on the inner bottom surface of the recovery box (100), and a movable door being provided on the surface of the recovery box (100) on one side of the guide assembly (200).

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