Heat exchange device of setting machine

Abstract

The utility model discloses a heat exchange device of a setting machine, which is characterized in that the heat exchange device comprises a machine case, 2-4 heat exchange units are arranged in the machine case, each heat exchange unit is formed by fixedly overlapping a plurality of heat exchange plates, a waste gas flow channel is formed between two opposite side faces of each heat exchange unit, a fresh air flow channel is formed between the other two opposite side faces of each heat exchange unit, and the waste gas flow channel is communicated with the fresh air flow channel. The waste gas flow channels and the fresh air flow channels are alternately arranged in the overlapping direction of the heat exchange plates; all the heat exchange units are sequentially, horizontally and hermetically connected in an edge-to-edge manner to form a heat exchange main body; the upper and lower edges, the front and rear surfaces of all the heat exchange units and the outer side edges of the heat exchange units at the two ends are hermetically connected with the corresponding walls of the case; a window is formed in each of the upper and lower parts of two end plates of the case; and a spraying pipe is arranged in front of the inlet of the waste gas flow channel of each heat exchange unit in the case. According to the utility model, the heat exchange efficiency of waste gas and fresh air is improved, and the heat exchange plate is convenient to clean.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchange technology, and in particular relates to a heat exchange device for a stenter. Background Technology

[0002] Stenter machines typically use heat-conducting oil to heat the air inside, which then heats the fabric. Once the fabric reaches a certain temperature and is held for a certain period, its structure changes, achieving the desired shape. The hot, humid exhaust gas emitted during operation can reach temperatures of 150-220℃; direct emission not only damages the environment but also results in significant energy waste. Therefore, installing a heat exchanger on the stenter effectively solves problems such as high energy consumption and the risk of fire in exhaust pipes by exchanging heat with fresh air before it enters the machine, while also achieving energy conservation and cost reduction. However, most existing heat exchangers for stentering use employ a tubular structure, which has low heat exchange efficiency, is prone to clogging, and is difficult to clean. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a heat exchange device for a stenter, so as to solve the problems of low heat exchange efficiency and troublesome cleaning of existing heat exchange devices for stenters.

[0004] To achieve the above-mentioned technical effects, the technical solution adopted by this utility model is as follows:

[0005] A heat exchange device for a stenter machine, characterized in that it includes a casing, within which 2-4 heat exchange units are provided. Each heat exchange unit is a rectangular or cubic structure formed by stacking and fixing several heat exchange plates. A closed flow channel is formed between adjacent heat exchange plates, and a waste gas flow channel is formed between two opposite sides of the heat exchange unit, while a fresh air flow channel is formed between two opposite sides. The waste gas flow channel and the fresh air flow channel are alternately arranged in the stacking direction of the heat exchange plates. All the heat exchange units are horizontal with the stacking direction of the heat exchange plates as the horizontal direction, and are connected by a pair of edges in that direction. The heat exchange unit is formed by horizontally sealing and connecting the opposite edges to form an integral structure. The upper and lower edges and front and rear surfaces of the heat exchange unit are sealed and connected to the upper and lower inner walls and the inner walls on both sides of the chassis. The outer edges of the heat exchange units at both ends are sealed and connected to the end plates of the chassis. Each end plate of the chassis has a window above and below the connection point with the edge of the heat exchange unit. The two windows on one side of the end plate are the exhaust gas inlet and the fresh air outlet, respectively, and the two windows on the other side are the exhaust gas outlet and the fresh air inlet. The chassis has a spray pipe in front of the inlet of the exhaust gas passage of each heat exchange unit.

[0006] Furthermore, one end of all the spray pipes extends out of the casing and is connected in series via the main liquid inlet pipe.

[0007] Furthermore, the bottom of the chassis is provided with multiple drain ports, and interface pipes are installed at the drain ports. All the interface pipes are connected in series through the main drain pipe.

[0008] Furthermore, adjacent heat exchange units in the heat exchange body are connected side by side in the same direction.

[0009] Furthermore, adjacent heat exchange units in the heat exchange body are connected in a mirror-symmetric manner.

[0010] Furthermore, the heat exchange plate has several protrusions evenly distributed on the surface of the waste gas flow channel side, and the heat exchange plate has corresponding depressions formed on the surface of the fresh air flow channel side at the protrusions.

[0011] Furthermore, the heat exchange plate is also provided with protruding pillars evenly distributed on the surface facing the fresh air flow channel.

[0012] Furthermore, the stacked adjacent heat exchange plates are arranged symmetrically.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model sets up multiple heat exchange units that are connected side by side in the chassis. The heat exchange units adopt a plate stacking structure, and the exhaust gas and fresh air inlets and outlets are set on both sides of the chassis. The air inlet and outlet directions are opposite. The chassis is equipped with a spray pipe in front of the exhaust gas flow channel of the heat exchange unit. Thus, this application can make full use of the heat energy of the exhaust gas, improve the heat exchange efficiency between the exhaust gas and the fresh air, and the heat exchange plates are easy to clean.

[0014] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the heat exchange device of this utility model;

[0016] Figure 2 This is a right view of the heat exchange device of this utility model;

[0017] Figure 3 for Figure 2 Enlarged view of part A;

[0018] Figure 4 This is the heat exchange unit of the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of multiple rectangular heat exchange units connected in the same direction according to this utility model;

[0020] Figure 6 This is a schematic diagram of a mirror connection method for multiple rectangular heat exchange units of this utility model;

[0021] Figure 7 This is a schematic diagram of a second mirror connection method for multiple rectangular heat exchange units of this utility model;

[0022] Figure 8 This is a schematic diagram showing the mirror connection of multiple square-structured heat exchange units of this utility model.

[0023] The labels and their corresponding names in the diagram are as follows:

[0024] 1. Chassis; 11. Exhaust gas inlet; 12. Exhaust gas outlet.

[0025] 13. Fresh air inlet, 14. Fresh air outlet, 2. Heat exchanger body,

[0026] 21. Heat exchange unit; 211. Heat exchange plate; 2111. Protrusion.

[0027] 2112. Depression, 2113. Protruding pillar, 212. Exhaust gas flow channel,

[0028] 213. Fresh air duct; 3. Cleaning mechanism; 31. Spray pipe;

[0029] 32. Main inlet pipe; 4. Drainage mechanism; 41. Interface pipe;

[0030] 42. Main drain pipe. Detailed Implementation

[0031] A heat exchange device for a stenter, such as Figure 1-7As shown, the heat exchange device includes a casing 1, a heat exchange body 2 consisting of 2-4 heat exchange units 21 installed inside the casing 1, and a cleaning mechanism 3 and a draining mechanism 4 installed on the casing 1. Each heat exchange unit 21 is a rectangular or cubic structure formed by stacking and fixing several heat exchange plates 211. A closed flow channel is formed between adjacent heat exchange plates 211, and a waste gas flow channel 212 is formed between two opposite sides of the heat exchange unit 21 for waste gas to enter and exit, while a fresh air flow channel 213 is formed between two opposite sides. The waste gas flow channel 212 and the fresh air flow channel 213 are alternately arranged in the stacking direction of the heat exchange plates 211. Several protrusions 2111 are evenly distributed on the surface of the heat exchange plates 211 on the waste gas flow channel 212 side, and corresponding recesses 2112 are formed on the fresh air flow channel 213 side of the heat exchange plates 211. The heat exchange plate 211 has evenly distributed protruding pillars 2113 on its surface facing the fresh air flow channel 213, and the stacked adjacent heat exchange plates 211 are symmetrically arranged. The heat exchange body 2 is a whole formed by all heat exchange units 21 with the stacking direction of the heat exchange plates 211 as the horizontal direction, and by sequentially sealing and connecting a pair of edges edge-to-edge in that direction, ensuring that the highest and lowest edges of all heat exchange units 21 are on the same horizontal plane. The edge-to-edge connection of adjacent heat exchange units 21 can be a parallel connection in the same direction (e.g., ...). Figure 5 As shown), it can also be a mirror-symmetric connection between the two (as shown). Figure 6 , 7 (As shown). When connected side-by-side in the same direction, all edges connecting the heat exchange units 21 are in the same horizontal plane; when connected in a mirror-symmetrical manner, all edges connecting the heat exchange units 21 may not be in the same horizontal plane. Preferably, the heat exchange unit 21 adopts a cubic structure and is arranged at a 45° angle (as shown). Figure 8(As shown). The upper and lower edges and front and rear surfaces of the heat exchange unit 21 are simultaneously and sealingly connected to the upper and lower inner walls and the inner walls on both sides of the chassis 1. The outer edges of the heat exchange unit 21 at both ends are sealingly connected to the end plates of the chassis 1. Each end plate of the chassis 1 has a window above and below the connection point with the edge of the heat exchange unit 21. The two windows on one side of the end plate of the chassis 1 are the exhaust gas inlet 11 and the fresh air outlet 14, respectively, and the two windows on the other side are the exhaust gas outlet 12 and the fresh air inlet 13. A fresh air filter is also installed at the fresh air outlet 14 to filter the introduced fresh air. The heat exchange body 2 forms two counter-current, intersecting wave-shaped fresh air inlet / outlet channels and exhaust gas inlet / outlet channels inside the chassis 1, with one side window as the inlet and the other side window as the outlet. A fresh air or exhaust gas turning zone is formed above or below the connection point of two adjacent heat exchange units 21. The cleaning mechanism 3 includes at least a spray pipe 31 and a main liquid inlet pipe 32. The spray pipe 31 is located in front of the inlet of the exhaust gas passage 212 of each heat exchange unit 21 inside the casing 1 (i.e., near the exhaust gas inlet 11 and the exhaust gas turning section) and is located outside the outlet of the exhaust gas passage of the heat exchanger near the exhaust gas outlet 12. Both ends of the spray pipe 31 are connected to the casing 1, and one end of all the spray pipes 31 extends out of the casing 1 and is connected to the main liquid inlet pipe 32 at the lower outer side of the casing 1 through a connecting pipe. The draining mechanism 4 includes multiple drain ports provided at the bottom of the casing 1, interface pipes 41 installed at the drain ports, and a main drain pipe 42 that connects all the interface pipes 41 in series. Preferably, the spray pipe 31 of the cleaning mechanism 3 adopts a double-layer structure, consisting of an inner pipe and an outer pipe outside the inner pipe. The two ends of the inner pipe are fixedly connected to the outer pipe. The inner pipe has several spray holes along its axial direction, and nozzles are installed at the spray holes. The outer pipe has a through hole with a diameter larger than the outer diameter of the nozzle at the nozzle, and the nozzle passes through the through hole. All inner pipes are connected through a liquid inlet main pipe 32, and all outer pipes are connected through an air inlet main pipe.

[0032] During operation, the hot and humid exhaust gas from the stenter is filtered and enters through the exhaust gas inlet of the machine casing. It then flows along a wave-shaped exhaust gas inlet / outlet channel and exits through the exhaust gas outlet. Simultaneously, fresh air enters through the fresh air inlet of the machine casing, exchanges heat with the exhaust gas along the wave-shaped fresh air inlet / outlet channel, and is then discharged through the fresh air outlet before being introduced into the stenter. After the heat exchange device has been used for a certain period or when a significant decrease in heat exchange efficiency is detected, the spray system is activated. High-pressure cleaning liquid is introduced into the inner pipe of the spray pipe through the main inlet pipe to clean the exhaust gas flow channel of the heat exchange unit, and high-pressure gas is introduced into the outer pipe of the spray pipe for blowing cleaning. This invention employs multiple series-connected plate heat exchange units for heat transfer between fresh air and exhaust gas. This allows for full utilization of the exhaust gas's thermal energy to exchange heat with the fresh air before introducing the hot air into the setting machine. This improves the heat exchange efficiency between exhaust and fresh air while reducing the cost of fabric setting. A spray pipe is installed in front of the exhaust gas inlet of the heat exchange unit, enabling online cleaning and facilitating easy cleaning of the heat exchange plates, thus reducing cleaning costs. The raised points and pillars on the heat exchange plates increase the heat exchange area and improve heat exchange efficiency. Simultaneously, the raised points and pillars provide effective support between adjacent heat exchange plates, resulting in good structural stability of the heat exchange unit.

[0033] This utility model is not limited to the specific embodiments described above. For those skilled in the art, all modifications made based on the above concept without creative effort fall within the protection scope of this utility model.

Claims

1. A heat exchange device for a setting machine, characterized in that, The unit includes a chassis containing 2-4 heat exchange units. Each heat exchange unit is a rectangular or cubic structure formed by stacking and fixing several heat exchange plates. A closed flow channel is formed between adjacent heat exchange plates, and an exhaust gas flow channel is formed between two opposite sides of the heat exchange unit, while a fresh air flow channel is formed between two opposite sides. The exhaust gas flow channel and the fresh air flow channel are alternately arranged in the stacking direction of the heat exchange plates. All heat exchange units are horizontally sealed with one pair of edges facing each other in that direction. The heat exchange unit is connected to form an integral structure. The upper and lower edges and front and rear surfaces of the heat exchange unit are sealed to the upper and lower inner walls and the inner walls on both sides of the chassis. The outer edges of the heat exchange units at both ends are sealed to the end plates of the chassis. Each end plate of the chassis has a window above and below the connection point with the edge of the heat exchange unit. The two windows on one side of the end plate are the exhaust gas inlet and the fresh air outlet, respectively, and the two windows on the other side are the exhaust gas outlet and the fresh air inlet. The chassis has a spray pipe in front of the inlet of the exhaust gas channel of each heat exchange unit.

2. The heat exchange device for a stenter according to claim 1, characterized in that, One end of all the spray pipes extends out of the casing and is connected in series via the main liquid inlet pipe.

3. The heat exchange device for a stenter according to claim 1, characterized in that, The bottom of the chassis is provided with multiple drain ports, and interface pipes are installed at the drain ports. All the interface pipes are connected in series through the main drain pipe.

4. The heat exchange device for a stenter according to claim 1, characterized in that, The adjacent heat exchange units in the heat exchange body are connected side by side in the same direction.

5. A heat exchange device for a stenter according to claim 1, characterized in that, The adjacent heat exchange units in the heat exchange body are connected in a mirror-symmetric manner.

6. A heat exchange device for a stenter according to claim 1, characterized in that, The heat exchange plate has several protrusions evenly distributed on the surface of the waste gas flow channel side, and the heat exchange plate has a corresponding depression formed on the surface of the fresh air flow channel side at the protrusions.

7. A heat exchange device for a stenter according to claim 6, characterized in that, The heat exchange plate also has protruding pillars evenly distributed on the surface facing the fresh air flow channel.

8. A heat exchange device for a stenter according to claim 7, characterized in that, The stacked adjacent heat exchange plates are arranged symmetrically.

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