Waste gas waste heat recovery device for setting machine

Abstract

The utility model discloses a waste gas waste heat recovery device for a setting machine. The waste gas waste heat recovery device comprises a box body, a heat exchange piece and a ventilation assembly, the left end and the right end of the box body are open. The multiple sets of heat exchange pieces are arranged in the box body front and back at intervals, and the internal space of the box body is divided into a plurality of hot air channels extending left and right. A fresh air channel which extends leftwards and rightwards and is provided with openings in the left end and the right end is formed in the heat exchange piece; the heat exchange piece is provided with a heat conduction side wall isolated between the fresh air channel and the hot air channel. The heat conduction side wall is of a wavy structure extending left and right. The two ventilation assemblies cover openings in the two ends of the box body in a sealing mode and are each provided with a fresh air opening communicating with the fresh air channels and a hot air opening communicating with the hot air channels. Heat exchange can be carried out in a two-way convection heat exchange mode, the heat exchange efficiency is high, oil dirt and soft flocks are not prone to being accumulated, blocking is not prone to being formed, and the operation requirement of the setting machine is effectively met.

Description

Technical Field

[0001] The utility model relates to the technical field of setting machines, in particular to an exhaust gas waste heat recovery device for a setting machine. Background Technique

[0002] A setting machine is a key device at the end of the fabric dyeing and finishing process. During the fabric production and processing process, the fabric is conveyed into the setting machine, and hot air is used to dry and shape the fabric. During the drying and shaping process, the setting machine will discharge waste hot gas with heat. Generally, to reduce heat loss, the above waste hot gas is utilized through heat exchange. In the prior art, a shell-and-tube heat exchanger or a vacuum tube heat exchanger is generally used for heat exchange. As Figure 1 shown is a structural schematic diagram of a heat exchanger in the prior art. During the heat exchange process, the waste hot gas contacts the heat exchange tubes 7. Due to its structural characteristics, it is easy for vortex air to form between the heat exchange tubes 7, resulting in the accumulation of oil scale and lint, which is likely to cause the overall blockage of the heat exchanger and affect the heat exchange efficiency. After using for a period of time, the heat exchange tubes 7 need to be disassembled and cleaned, which is time-consuming and laborious and difficult to meet the operation requirements of the setting machine. Content of the Utility Model

[0003] Aiming at the above existing technical problems, the purpose of the utility model is to propose an exhaust gas waste heat recovery device for a setting machine, which can carry out heat exchange through the way of bidirectional convective heat exchange, has high heat exchange efficiency, is not easy to form the accumulation of oil scale and lint, is not easy to form blockage, and effectively meets the operation requirements of the setting machine.

[0004] The technical solution of the utility model is realized as follows: An exhaust gas waste heat recovery device for a setting machine includes a box body, a heat exchange member, and a ventilation component;

[0005] The left and right ends of the box body are provided with openings;

[0006] A plurality of groups of the heat exchange members are arranged at intervals in the front and rear directions in the box body, and divide the internal space of the box body into a plurality of hot air channels extending left and right;

[0007] The inside of the heat exchange member has a fresh air channel extending left and right and having openings at both the left and right ends; and the heat exchange member has a heat conduction side wall isolated between the fresh air channel and the hot air channel; the heat conduction side wall is a wavy structure extending left and right;

[0008] Two groups of the ventilation components cover the openings at both ends of the box body, and each has a fresh air inlet communicated with each fresh air channel and a hot air outlet communicated with each hot air channel.

[0009] Further, the ventilation assembly includes a sealing plate and a diversion plate; the sealing plate is connected to the box body and covers the open end of the box body; the diversion plate is arranged on the sealing plate and covers the open ends of each hot air channel and each fresh air channel; on one side of the upper and lower sides of the diversion plate, a hot air diversion opening communicating with the hot air channel is provided corresponding to each hot air channel; on the other side of the upper and lower sides of the sealing plate, a fresh air diversion opening communicating with the fresh air channel is provided corresponding to each fresh air channel; a hot air delivery cavity communicating with each hot air diversion opening and a fresh air delivery cavity communicating with each fresh air diversion opening are provided on the sealing plate; the fresh air inlet is arranged on the sealing plate and communicates with the fresh air delivery cavity; the hot air inlet is arranged on the sealing plate and communicates with the hot air delivery cavity.

[0010] Further, the diversion plate is embedded in the end surface of the sealing plate facing the box body.

[0011] Further, among the ventilation assemblies on both sides, the up-and-down arrangement directions of the fresh air inlets of the ventilation assembly on the first side and the ventilation assembly on the second side are opposite.

[0012] Further, the waste heat recovery device for exhaust gas includes a spraying device; the spraying device is arranged on the top of the box body and includes spray heads and a water delivery pipeline; the spray heads are arranged in the box body at intervals above each hot air channel; the water delivery pipeline is arranged outside the box body, and one end of the water delivery pipeline penetrates into the interior of the box body from the top of the box body and is connected to each spray head.

[0013] Further, a drain port communicating with the hot air channel is provided at the bottom of the box body corresponding to each hot air channel; a water collector is provided on the box body; a water collecting cavity communicating with each drain port is formed inside the water collector; a drain pipeline communicating with the water collecting cavity is provided on the water collector.

[0014] Further, the heat-conducting side wall is made of a metal heat-conducting material.

[0015] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0016] 1. By the combined use of the heat exchange element and the ventilation component, a fresh air passage for fresh air to pass through is formed inside the heat exchange element, and a hot air passage for waste hot air to pass through is formed outside the heat exchange element within the box body. The extending directions of the fresh air passage and the hot air passage are the same. Through the guidance of the ventilation component, the fresh air in the fresh air passage and the waste hot air in the hot air passage can form an opposite flow and perform heat exchange through the heat exchange element. The combination of the above methods can conduct heat exchange through the method of two-way convective heat transfer, with high heat exchange efficiency. The waste hot air will not generate vortices in the hot air passage, and it is not easy to form accumulations of oil scale, hair, and debris. The overall structure is not easy to form blockages, reducing the frequency of maintenance and cleaning, and effectively meeting the operation requirements of the stenter.

[0017] 2. By designing the heat-conducting side wall of the heat exchange element into a wavy structure, the present utility model can effectively increase the heat exchange area of the heat exchange element, thereby effectively improving the heat exchange efficiency.

[0018] 3. By the combined use of the spraying device, the hot air passage can be sprayed and cleaned. Since there is no obstruction in the spatial structure of the hot air passage, the spray head can wash each position of the hot air passage. The hot air passage is cleaned thoroughly, the cleaning is convenient, time-saving and labor-saving, and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The technical solution of the present utility model will be further described below in conjunction with the drawings:

[0020] Figure 1 is a schematic structural diagram of the heat exchanger in the background art;

[0021] Figure 2 is a three-dimensional structural diagram of the overall structure of the present utility model;

[0022] Figure 3 is Figure 2 a top view structural diagram;

[0023] Figure 4 is Figure 3 a sectional view taken along line A-A in

[0024] Figure 5 is Figure 3 a sectional view taken along line B- in

[0025] Figure 6 is Figure 2 an exploded view;

[0026] Figure 7 is an assembly schematic diagram of the heat exchange element and the deflector of the present utility model;

[0027] Figure 8 is a three-dimensional structural diagram of the heat exchange element of the present utility model;

[0028] Figure 9 It is an assembly schematic diagram of the sealing plate and the flow guiding plate of the present utility model;

[0029] Figure 10 It is an assembly schematic diagram of the box body and the water collector of the present utility model;

[0030] Wherein: 1. Box body; 11. Drainage port; 2. Heat exchange element; 21. Fresh air channel; 22. Hot air channel; 23. Heat conduction side wall; 3. Sealing plate; 31. Fresh air inlet; 311. Fresh air conveying cavity; 32. Hot air inlet; 321. Hot air conveying cavity; 4. Flow guiding plate; 41. Fresh air flow guiding port; 42. Hot air flow guiding port; 5. Spray head; 51. Water conveying pipeline; 6. Water collector; 61. Water collecting cavity; 62. Drainage pipeline; 7. Heat exchange tube. Specific embodiments

[0031] The following will elaborate on the preferred embodiments of the present utility model in conjunction with the accompanying drawings, so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making the protection scope of the present utility model more clearly defined.

[0032] As Figure 2-10 shown is a waste gas heat recovery device for a stenter described in this embodiment. Through this waste gas heat recovery device, the heat in the waste hot gas discharged from the stenter can be recovered. The waste gas heat recovery device includes a box body 1, a heat exchange element 2, and a ventilation assembly. Among them, the box body 1 has a hollow structure inside and is arranged with open ends at both left and right ends. A plurality of groups of the heat exchange elements 2 are arranged at intervals front and back in the box body 1, and the internal space of the box body 1 is divided into a plurality of hot air channels 22 extending left and right. The above-mentioned hot air channels 22 are for the waste hot gas discharged from the stenter to pass through. Specifically arranged, the heat exchange element 2 extends in the left-right direction, and the top and bottom of the heat exchange element 2 are in close fit with the inner wall of the box body 1. The heat exchange element 2 has a fresh air channel 21 extending left and right and with open ends at both left and right ends. The above-mentioned fresh air channel 21 is for ambient air to flow through. And the heat exchange element 2 has a heat conduction side wall 23 isolated between the fresh air channel 21 and the hot air channel 22. The heat conduction side wall 23 is made of a metal heat conduction material to be able to conduct heat. Through the above structural design, when the waste hot gas flows in the hot air channel 22 and the ambient air flows through the fresh air channel 21, the waste hot gas and the ambient air flow conduct heat exchange through the heat conduction side wall 23.

[0033] When specifically designing the structure, the heat conduction side wall 23 is processed into a wavy structure extending left and right, which can effectively increase the heat exchange area of the heat exchange element 2 to effectively improve the heat exchange efficiency.

[0034] Two groups of ventilation assemblies cover the open ends at both ends of the box body 1, and both have a fresh air inlet 31 communicating with each fresh air channel 21 and a hot air inlet 32 communicating with each hot air channel 22. AsFigure 4 , 5 As shown in 5 , among the two groups of ventilation components, the fresh air inlet 31 of one group is the fresh air intake, and the fresh air inlet 31 of the other group is the fresh air outlet. Also, among the two groups of ventilation components, the hot air inlet 32 of one group is the waste hot air intake, and the hot air inlet 32 of the other group is the waste hot air outlet. In this embodiment, among the ventilation components on the two sides mentioned above, the up-and-down arrangement directions of the fresh air inlets 31 of the ventilation components on the first side and the fresh air inlets 31 of the ventilation components on the second side are opposite, so as to be able to extend the conveying path of the waste hot air in the hot air channel 22 and extend the conveying path of the ambient air flow in the fresh air channel 21, enabling the ambient air flow and the waste hot air to fully exchange heat.

[0035] Specifically, the ventilation component includes a sealing plate 3 and a flow guiding plate 4. The sealing plate 3 is connected to the box body 1 by bolts and covers the open end of the box body 1 to enclose the heat exchange element 2 inside the box body 1. The flow guiding plate 4 is embedded on the end face of the sealing plate 3 facing the box body 1 and simultaneously covers the open ends of each hot air channel 22 and the open ends of each fresh air channel 21. Among them, on one side of the upper and lower sides of the flow guiding plate 4, a hot air guiding port 42 communicating with the hot air channel 22 is processed corresponding to each hot air channel 22. On the other side of the upper and lower sides of the sealing plate 3, a fresh air guiding port 41 communicating with the fresh air channel 21 is processed corresponding to each fresh air channel 21. A hot air conveying cavity 321 and a fresh air conveying cavity 311 are formed on the end face of the sealing plate 3 facing the box body 1. The hot air conveying cavity 321 and the fresh air conveying cavity 311 are arranged at an interval in the up-and-down direction and both extend in the front-rear direction. Among them, the hot air conveying cavity 321 is communicated with each hot air guiding port 42, and the fresh air conveying cavity 311 is connected to each fresh air guiding port 41. The aforementioned fresh air inlet 31 is arranged on the sealing plate 3 and is communicated with the fresh air conveying cavity 311. The aforementioned hot air inlet 32 is arranged on the sealing plate 3 and is communicated with the hot air conveying cavity 321. Through the above structural design, the hot air inlet 32, the hot air conveying cavity 321, and the hot air guiding port 42 form a hot air conveying path communicating with the hot air channel 22, and the fresh air inlet 31, the fresh air conveying cavity 311, and the fresh air guiding port 41 form a fresh air conveying path communicating with the fresh air channel 21.

[0036] The waste heat recovery device of this embodiment includes a spraying device. The spraying device is installed on the top of the box body 1 and includes a spray head 5 and a water conveying pipeline 51. A plurality of spray heads 5 are arranged at intervals above each hot air channel 22 inside the box body 1. The water conveying pipeline 51 is installed outside the box body 1. One end of the water conveying pipeline 51 penetrates into the inside of the box body 1 from the top of the box body 1 and is connected to each spray head 5. The water conveying pipeline 51 is connected to a water pump, and the water pump can convey water flow into the water conveying pipeline 51, and the water flow sprays out from the spray head 5 to wash the hot air channel 22.

[0037] In this embodiment, a drain port 11 communicating with the hot air channel 22 is processed at the bottom of the box body 1 corresponding to each hot air channel 22. A water collector 6 is installed on the bottom of the box body 1. A water collecting cavity 61 extending in the front-rear direction is formed inside the water collector 6. Each drain port 11 communicates with the water collecting cavity 61. A drain pipe 62 communicating with the water collecting cavity 61 is processed on the water collector 6. The water for flushing the hot air channel 22 can enter the water collecting cavity 61 through the drain port 11 to be centrally collected and then discharged from the drain pipe 62. A switch valve is installed on the drain pipe 62 to control the opening and closing of the drain pipe 62.

[0038] During specific use, as Figure 4 、 5 shown, the waste hot air discharged from the stenter enters the hot air channel 22 through the hot air inlet 32, hot air conveying cavity 321, and hot air diversion port 42 on the first side, and then is discharged from the hot air inlet 32 on the second side. The ambient air flow enters the fresh air channel 21 through the fresh air inlet 31, fresh air conveying cavity 311, and fresh air diversion port 41 on the second side, and then is discharged from the fresh air inlet 31 on the first side. In this way, the fresh air in the fresh air channel 21 and the waste hot air in the hot air channel 22 can form an opposite flow and perform heat exchange through the heat exchange member 2. Through the combination of the above methods, heat exchange can be carried out by means of two-way convective heat transfer, and the heat exchange efficiency is high. Since the hot air channel 22 is a linear channel, the waste hot air will not generate vortices in the hot air channel 22, and it is not easy to form accumulations of oil scale and lint. The overall structure is not easy to form blockages, reducing the maintenance and cleaning frequency, and effectively meeting the operating requirements of the stenter.

[0039] During cleaning, water is sprayed through the spray head 5 to spray and clean the side wall of the hot air channel 22 (i.e., the outer wall surface of the heat-conducting side wall 23 of the heat exchange member 2). The flushing water enters the water collecting cavity 61 through the drain port 11 and is then discharged through the drain pipe 62. Since there is no obstruction in the spatial structure of the hot air channel 22, the spray head 5 can flush each position of the hot air channel 22. The hot air channel 22 is cleaned thoroughly, the cleaning is convenient, time-saving and labor-saving, and the practicability is strong.

[0040] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the content of the specification of the present invention, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. An exhaust gas waste heat recovery device for a setting machine, comprising a box body, a heat exchange member, and a ventilation assembly; characterized in that: The left and right ends of the box body are open; A plurality of groups of the heat exchange members are arranged at intervals in the front and rear directions in the box body, and divide the internal space of the box body into a plurality of hot air channels extending left and right; The inside of the heat exchange member has a fresh air channel extending left and right and open at both the left and right ends; and the heat exchange member has a heat conduction side wall isolated between the fresh air channel and the hot air channel; the heat conduction side wall is a wavy structure extending left and right; Two groups of the ventilation assemblies cover the open ends of the box body, and each has a fresh air inlet communicating with each fresh air channel and a hot air outlet communicating with each hot air channel.

2. The waste heat recovery device for a stenter according to claim 1, characterized in that: The ventilation assembly includes a sealing plate and a guide plate; the sealing plate is connected to the box body and covers the open end of the box body; the guide plate is arranged on the sealing plate and covers the open ends of each of the hot air channels and the open ends of each of the fresh air channels; on one side of the upper and lower sides of the guide plate, a hot air guide opening communicating with the hot air channel is provided corresponding to each hot air channel; on the other side of the upper and lower sides of the sealing plate, a fresh air guide opening communicating with the fresh air channel is provided corresponding to each fresh air channel; a hot air conveying cavity communicating with each hot air guide opening is provided on the sealing plate, and a fresh air conveying cavity communicating with each fresh air guide opening is provided; the fresh air inlet is arranged on the sealing plate and communicates with the fresh air conveying cavity; the hot air outlet is arranged on the sealing plate and communicates with the hot air conveying cavity.

3. The waste heat recovery device for a stenter according to claim 2, wherein: The guide plate is embedded on the end face of the sealing plate facing the box body.

4. The waste heat recovery device for a stenter according to claim 1, characterized in that: Among the ventilation assemblies on both sides, the up-and-down arrangement directions of the fresh air inlets of the ventilation assembly on the first side and the fresh air inlets of the ventilation assembly on the second side are opposite.

5. The waste heat recovery device for a stenter according to claim 1, wherein: The exhaust gas waste heat recovery device includes a spraying device; the spraying device is arranged on the top of the box body and includes a spray head and a water conveying pipeline; the spray heads are arranged at intervals above each hot air channel in the box body; the water conveying pipeline is arranged outside the box body, and one end of the water conveying pipeline penetrates into the interior of the box body from the top of the box body and is connected to each spray head.

6. The waste heat recovery device for a stenter according to claim 1, characterized in that: A drain port communicating with the hot air channel is provided at the bottom of the box body corresponding to each of the hot air channels; a water collector is provided on the box body; a water collecting cavity communicating with each drain port is formed inside the water collector; a drain pipeline communicating with the water collecting cavity is provided on the water collector.

7. The waste heat recovery device for a stenter according to claim 1, wherein: The heat conduction side wall is made of a metal heat conduction material.

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