Steam generator tail gas waste heat recovery device

Abstract

The steam generator tail gas waste heat recovery device comprises a shell, heat exchange pieces and a water collection cover, a downward opening is formed in one side of the shell, an upward opening is formed in the other side of the shell, and the middle of the shell is parallel to the horizontal plane; the multiple heat exchange pieces are installed in the middle of the shell in parallel. A plurality of water pipes are arranged on the heat exchange pieces in parallel, the two ends of each water pipe outwards penetrate out of the shell, and the outer walls of the water pipes are fixedly connected with the shell. The water collecting covers are installed on the upper end face and the lower end face of the middle of the shell and cover the outer sides of the ends of the water pipes. The device is installed at a tail gas outlet of an existing steam generator, heat exchange can be conducted through water in the water pipe and tail gas, and therefore the temperature of the tail gas is reduced, heat energy resource waste is avoided, meanwhile, steam generated by a water dust removal processor is reduced, and the service life of a sealing piece of the water dust removal processor is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of wood product processing equipment, and in particular to a steam generator tail gas waste heat recovery device. Background Art

[0002] During the production of wooden products, dehumidification and drying are sometimes required, such as for bleached wooden hangers. To meet this need, wood processing companies have introduced drying and dehumidification kiln equipment. This equipment primarily utilizes a steam generator to generate steam, which is then heated by a radiator to circulate air within the drying and dehumidification kiln, achieving the purpose of drying and dehumidification. During operation, the high temperature of the exhaust pipe at the rear of the steam generator causes a large amount of steam to be generated in the water dust removal unit used to treat the exhaust gas. This wastes thermal energy resources and accelerates the aging of some seals in the water dust removal unit. Therefore, a steam generator exhaust waste heat recovery device is required that can reduce the temperature of the exhaust gas discharged from the exhaust pipe through heat exchange. Furthermore, the waste heat recovery device is easy to disassemble and assemble, facilitating internal cleaning and preventing the accumulation of smoke and dust in the exhaust gas within the waste heat recovery device. Utility Model Content

[0003] In order to solve the above problems, the present application proposes a steam generator exhaust gas waste heat recovery device, which can reduce the temperature of the exhaust gas discharged from the exhaust pipe by heat exchange. The waste heat recovery device is easy to disassemble and assemble, and is convenient for internal cleaning to prevent smoke and dust in the exhaust gas from accumulating in the waste heat recovery device.

[0004] This application is achieved through the following technical solutions:

[0005] The present application proposes a steam generator exhaust gas waste heat recovery device, comprising: a shell, a heat exchange plate, and a water collecting cover, wherein a downward opening is provided on one side of the shell, and an upward opening is provided on the other side of the shell, and the middle part of the shell is parallel to the horizontal plane; the heat exchange plates are provided in multiple pieces, and the multiple heat exchange plates are installed in parallel with each other in the middle part of the shell; a plurality of water pipes are provided in parallel on the heat exchange plates, and both ends of the water pipes pass out of the shell, and the outer walls of the water pipes are fixedly connected to the shell; the water collecting cover is installed on the upper and lower end surfaces in the middle part of the shell, and the water collecting cover covers the outside of the ends of the water pipes.

[0006] Furthermore, a first connecting plate is provided on the openings on both sides of the shell, a second connecting plate is provided in the middle of the water collecting cover, and the end surface of the first connecting plate is flush with the end surface of the second connecting plate.

[0007] Furthermore, there are multiple shells, and the multiple shells are connected to each other through a first connecting plate. When the shells are connected to each other, the water collecting covers on different shells are connected to each other through a second connecting plate.

[0008] Furthermore, sealing rings are provided on both the first connecting plate and the second connecting plate.

[0009] Furthermore, cleaning ports are provided on both sides of the shell, the cleaning ports are directly opposite to the sides of the heat exchange fins, and cover plates are provided on the cleaning ports, and the cover plates are fixed to the outside of the shell by bolts.

[0010] Furthermore, the heat exchange fins are spaced 10 mm to 30 mm apart, and the spacing between the heat exchange fins on both sides of the shell is greater than the spacing between the heat exchange fins in the middle of the shell.

[0011] The beneficial effects of this application are: by being installed at the exhaust gas outlet of an existing steam generator, heat can be exchanged with the exhaust gas through the water in the water pipe, thereby reducing the temperature of the exhaust gas, avoiding waste of thermal energy resources, and at the same time reducing the steam generated by the water dust removal processor and extending the service life of the water dust removal processor seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a schematic diagram of the mutual connection of the housings of the present invention;

[0014] Figure 3 This is a schematic diagram of the structure inside the shell of the utility model;

[0015] In the figure: 1-shell, 2-heat exchange plate, 3-water collecting cover, 4-water pipe, 5-first connecting plate, 6-second connecting plate, 7-cover plate. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0018] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0019] like Figures 1 to 3 As shown, an embodiment of the present invention provides a steam generator exhaust gas waste heat recovery device, including: a shell 1, a heat exchange plate 2, and a water collecting cover 3. A downward opening is provided on one side of the shell 1, and an upward opening is provided on the other side of the shell 1. The middle part of the shell 1 is parallel to the horizontal plane; there are multiple heat exchange plates 2, and the multiple heat exchange plates 2 are installed in parallel with each other in the middle part of the shell 1; multiple water pipes 4 are provided in parallel on the heat exchange plates 2, and both ends of the water pipes 4 pass through the shell 1 outward, and the outer wall of the water pipe 4 is fixedly connected to the shell 1; the water collecting cover 3 is installed on the upper and lower end surfaces of the middle part of the shell 1, and the water collecting cover 3 covers the outside of the end of the water pipe 4.

[0020] One side of the shell 1 is connected to the exhaust gas outlet of the steam generator. After entering the shell 1, the high-temperature exhaust gas flows horizontally through the heat exchange fins 2 in the center of the shell 1, causing the heat exchange fins 2 to heat up. As the water in the water pipe 4 flows through it, it removes heat from the heat exchange fins 2 through heat conduction, ultimately increasing the water temperature and reducing the exhaust gas temperature. To improve the efficiency of exhaust gas heat recovery, multiple shells 1 can be connected, allowing the exhaust gas to flow through multiple shells 1 in sequence, exchanging heat with the heat exchange fins 2 in each shell 1. This increases the number of heat exchanges and further reduces the exhaust gas temperature. After heat exchange, the exhaust gas enters the water dust removal processor from the upper outlet of the shell 1. After being sprayed with water to reduce dust, it is discharged into the atmosphere. The water, heated by heat exchange, is heated and can be used to treat wood or be fed into the steam generator, improving thermal energy utilization. The low-temperature exhaust gas is less likely to generate steam when it is cleaned in the water dust removal processor, allowing the sealing rubber ring to operate at a lower temperature, extending the service life of the seal.

[0021] Preferably, a first connecting plate 5 is provided on the openings on both sides of the shell 1, a second connecting plate 6 is provided in the middle of the water collecting cover 3, and the end face of the first connecting plate 5 is flush with the end face of the second connecting plate 6. The first connecting plate 5 and the second connecting plate 6 are provided with multiple through holes to facilitate the connection between the first connecting plates 5 and the second connecting plates 6 by bolts.

[0022] Preferably, if Figure 2As shown, there are multiple shells 1, which are interconnected by first connecting plates 5. When the shells 1 are interconnected, the water collection covers 3 on different shells 1 are interconnected by second connecting plates 6. After the shells 1 are interconnected, the exhaust path becomes longer and the heat exchange area is increased, thereby improving heat exchange efficiency. The shells 1 adopt a modular design, and enterprises can flexibly configure the number of shells 1 according to their own equipment conditions to ensure good heat exchange efficiency.

[0023] Preferably, sealing rings are provided on the first connecting plate 5 and the second connecting plate 6, so that the connections between the shells 1 and the water collecting covers 3 are well sealed. The sealing rings can be made of fluororubber rings, which have a good service life under high temperature conditions and improve the reliability of the equipment.

[0024] Preferably, if Figure 1 As shown, cleaning ports are provided on both sides of the shell 1, and the cleaning ports are opposite to the sides of the heat exchanger 2. A cover plate 7 is provided on the cleaning port, and the cover plate 7 is fixed to the outside of the shell 1 by bolts. Since there will be some smoke and dust in the exhaust gas, it is easy to adhere to the heat exchanger 2. The maintenance personnel can open the cover plate 7 and flush the heat exchanger 2 with a high-pressure water gun to ensure the cleanliness of the heat exchanger 2 and keep the heat exchanger 2 at a good heat exchange efficiency.

[0025] Preferably, the interval between the heat exchange fins 2 is 10 mm to 30 mm, and the interval between the heat exchange fins 2 on both sides of the shell 1 is larger than the interval between the heat exchange fins 2 in the middle of the shell 1. When the exhaust gas flows, the resistance in the shell 1 is small and the flow rate is fast. Therefore, by controlling the interval between the heat exchange fins 2, when the exhaust gas flows through the heat exchange fins 2, the flow rates on both sides of the shell 1 and the middle of the shell 1 are close, so that the flue gas can be evenly heat exchanged.

[0026] Of course, the present application may have many other implementations. Based on the present implementation, other implementations obtained by ordinary technicians in this field without any creative work are all within the scope of protection of the present application.

Claims

1. A steam generator tail gas waste heat recovery device, characterized in that: include: A shell (1), a heat exchange plate (2), and a water collecting cover (3), wherein one side of the shell (1) is provided with a downward opening, and the other side of the shell (1) is provided with an upward opening, and the middle of the shell (1) is parallel to the horizontal plane; the heat exchange plates (2) are provided in plurality, and the plurality of heat exchange plates (2) are installed in parallel in the middle of the shell (1); a plurality of water pipes (4) are provided in parallel on the heat exchange plates (2), and both ends of the water pipes (4) pass through the shell (1) outward, and the outer walls of the water pipes (4) are fixedly connected to the shell (1); the water collecting cover (3) is installed on the upper and lower end surfaces of the middle of the shell (1), and the water collecting cover (3) covers the outer sides of the ends of the water pipes (4).

2. A steam generator tail gas waste heat recovery device according to claim 1, characterized in that: A first connecting plate (5) is provided on the openings on both sides of the shell (1), a second connecting plate (6) is provided in the middle of the water collecting cover (3), and the end surface of the first connecting plate (5) is flush with the end surface of the second connecting plate (6).

3. A steam generator tail gas waste heat recovery device according to claim 2, characterized in that: There are multiple shells (1), and the multiple shells (1) are connected to each other via a first connecting plate (5). When the shells (1) are connected to each other, the water collecting covers (3) on different shells (1) are connected to each other via a second connecting plate (6).

4. A steam generator tail gas waste heat recovery device according to claim 2, characterized in that: The first connecting plate (5) and the second connecting plate (6) are both provided with sealing rings.

5. The steam generator tail gas waste heat recovery device according to claim 1, characterized in that: The shell (1) is provided with cleaning ports on both sides, the cleaning ports facing the sides of the heat exchange plate (2), and a cover plate (7) is provided on the cleaning ports, and the cover plate (7) is fixed to the outside of the shell (1) by bolts.

6. The steam generator tail gas waste heat recovery device according to claim 1, characterized in that: The heat exchange fins (2) are spaced 10 mm to 30 mm apart, and the spacing between the heat exchange fins (2) on both sides of the shell (1) is greater than the spacing between the heat exchange fins (2) in the middle of the shell (1).

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