Parallel convection type heat exchange waste heat recovery device for setting machine
By adopting a parallel convection heat exchange structure and a multi-air heat exchange tube fin design in the stenter, the problem of insufficient utilization of waste heat from the stenter exhaust gas is solved, achieving efficient waste heat recovery and energy consumption reduction.
Patent Information
- Application Number
- CN202520122476.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-18
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-01-18
AI Technical Summary
The existing stenter exhaust heat utilization is insufficient, resulting in high energy consumption.
It adopts a parallel convection heat exchange structure, which improves the heat exchange effect by setting the exhaust gas and air in opposite directions and using multiple air heat exchange tubes and fins.
It significantly improves waste heat recovery efficiency and reduces the energy consumption of the stenter.
Smart Images
Figure CN223710343U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste gas treatment technology, and in particular to a waste heat recovery device for a stenter with parallel convection heat exchange. Background Technology
[0002] Currently, the setting machine process requires fabrics to undergo high-temperature treatment at 150-200℃ in an oven. This process generates a large amount of high-temperature exhaust gas and necessitates heating the incoming fresh air. Existing setting machine exhaust gas discharge and fresh air intake structures are as follows: Figure 7 As shown, the exhaust gas from the stenter enters the gas collection pipe through the stenter exhaust pipe and is then discharged through the chimney. Some of the heat in the exhaust gas remains in the gas collection pipe and the chimney. Fresh air enters the stenter through the fresh air duct and the stenter fresh air inlet pipe. The part of the fresh air duct outside the gas collection pipe has an opening for introducing fresh air, while the part of the fresh air duct inside the gas collection pipe can heat the fresh air, thus giving the fresh air entering the stenter a certain amount of heat. However, the existing technology does not make sufficient use of the waste heat of the exhaust gas, thereby increasing energy consumption. Utility Model Content
[0003] The purpose of this invention is to provide a waste heat recovery device for a stenter with parallel convection heat exchange. By setting the waste gas flow direction and the air flow direction in opposite directions for convection, and by setting multiple air heat exchange tubes, the heat exchange effect can be effectively improved, thereby improving the waste heat recovery of the stenter and significantly reducing energy consumption.
[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:
[0005] A waste heat recovery device for a stenter with parallel convection heat exchange includes an air inlet shell and a heat exchange channel. The air inlet shell is located at the front end of the heat exchange channel. The heat exchange channel has a rectangular annular cross-section. A first partition and a second partition are fixed inside the front end of the heat exchange channel, and the first partition, the second partition, and the inner wall of the front end of the heat exchange channel form a first air cavity. A third partition and a fourth partition are fixed inside the rear end of the heat exchange channel, and the third partition, the fourth partition, and the inner wall of the rear end of the heat exchange channel form a second air cavity. The fourth partition and the inner wall of the rear end of the heat exchange channel enclose a waste gas outlet cavity. The second partition, the third partition, and the inner wall of the middle section of the heat exchange channel form a waste gas channel.
[0006] The first air cavity and the second air cavity are connected by multiple air heat exchange pipes. The front end of the air inlet shell and the exhaust gas channel are connected by multiple first exhaust gas pipes. The rear end of the exhaust gas channel is connected to the exhaust gas outlet cavity by multiple second exhaust gas pipes.
[0007] The heat exchange channel is provided with an air outlet connecting part and an air inlet connecting part at two ends thereof, the air outlet connecting part is communicated with the first air cavity, and the air inlet connecting part is communicated with the second air cavity.
[0008] Through the above technical scheme, the high-temperature waste gas generated by the setting machine enters into the air inlet shell, then enters into the waste gas channel through the first waste gas pipe, and flows backward along the waste gas channel and enters into the air outlet cavity through the second waste gas pipe; the heat of the high-temperature waste gas makes the first air cavity, the waste gas channel and the second air cavity full of heat
[0009] The air at normal temperature enters into the second air cavity through the air inlet connecting part, then enters into the first air cavity through the air heat exchange pipe, the heat in the second air cavity preliminarily heats the entering air, then the heat in the waste gas channel further heats the heat flowing through the air heat exchange pipe through the air heat exchange pipe, finally, the air in the first air cavity is finally heated by the heat in the first air cavity after entering into the first air cavity, through three times of heating, the air at normal temperature of about 20 degrees Celsius can be heated to about 170 degrees Celsius, and the temperature of the waste gas of the setting machine is from about 200 degrees Celsius to about 50 degrees Celsius, the flow direction of the air and the flow direction of the waste gas are oppositely arranged and parallelly arranged in countercurrent, so that the heat in the high-temperature waste gas can be fully exchanged, and the utilization of energy is improved.
[0010] The utility model discloses further set up as: the both ends of air heat exchange pipe are inserted and seal fixed on second baffle and third baffle, the first waste gas pipe is inserted and fixed on first baffle and second baffle and reaches both ends, the second waste gas pipe is inserted and fixed on third baffle and fourth baffle and reaches both ends,
[0011] The cross section of the air heat exchange pipe is a short rectangular tube, and the plurality of air heat exchange pipes are arranged in a rectangular array.
[0012] A plurality of air heat exchange pipes are arranged between the two adjacent first waste gas pipes and between the two adjacent second waste gas pipes.
[0013] Through the above technical scheme, the number of air heat exchange pipes is much larger than that of waste gas pipes, so that the air heat exchange pipes can fully absorb the heat generated by the high-temperature waste gas, thereby achieving better heat exchange effect.
[0014] The utility model discloses further set up as: the outer wall of air heat exchange pipe is fixed with a plurality of fins, and the adjacent two side fins are staggered and arranged.
[0015] Through the technical scheme, the fin can reduce the flow rate of the exhaust gas in the heat exchange channel, so that the air heat exchange pipe can fully absorb heat, and the fin can also increase the heat absorption area of the air heat exchange pipe, thereby further improving the heat absorption.
[0016] The utility model further sets up further: air intake shell is equipped with air intake interface, is equipped with two air intake passages with air intake interface in air intake shell, is equipped with first air door, filter screen and second air door on every air intake passage, air intake shell is equipped with with two air intake passages transition chamber, the front end of first exhaust pipe is drawn into in transition chamber.
[0017] Through the technical scheme, two channels can be switched and used, and the filter screen can be conveniently cleaned.
[0018] When one air intake passage works, the first air door and the second air door in the air intake passage are opened.
[0019] The utility model further sets up further: the rear end of heat exchange channel is fixed with exhaust gas connecting pipe, and the exhaust gas connecting pipe is connected with exhaust gas outlet cavity.
[0020] The utility model further sets up further: heat exchange channel includes shell body, inner shell body that is set up at inside of shell body, and the shell body and inner shell body are filled with heat insulation material.
[0021] Through the technical scheme, the heat exchange channel is filled with heat insulation material, which can effectively reduce the heat loss in the heat exchange channel.
[0022] The utility model has the advantages of:
[0023] Compared with the prior art, the exhaust gas flow direction and the air flow direction are opposite, and multiple air heat exchange pipes are arranged, which can effectively improve the heat exchange effect, improve the waste heat recovery of the setting machine, make the entering fresh air have higher stability, and greatly reduce the energy consumption. DRAWINGS
[0024] Figure 1 It is a structural schematic view of the utility model;
[0025] Figure 2 It is a left view of the utility model;
[0026] Figure 3 It is Figure 2 It is a sectional view about A-A (after turning 90 degrees counterclockwise);
[0027] Figure 4 It is Figure 3 It is a sectional view about B-B;
[0028] Figure 5 It isFigure 2 Sectional view of C-C;
[0029] Figure 6 Structure diagram of heat exchange channel of the utility model;
[0030] Figure 7 Simple schematic diagram of waste heat utilization of the prior art setting machine.
[0031] Reference signs: 10, air inlet shell; 101, air inlet interface; 102, air inlet channel; 103, first air door; 104, filter screen; 105, second air door; 106, transition cavity;
[0032] 20, heat exchange channel; 21, first partition plate; 22, second partition plate; 23, third partition plate; 24, fourth partition plate; 25, air heat exchange; 26, first waste gas pipe; 27, second waste gas pipe; 28, air outlet connecting part; 29, air inlet connecting part;
[0033] 201, outer shell; 202, inner shell; 203, heat insulation material;
[0034] 2001, first air cavity; 2002, second air cavity; 2003, waste gas outlet cavity; 2004, waste gas channel;
[0035] 30, fin;
[0036] 40, waste gas connecting pipe. DETAILED DESCRIPTION
[0037] The specific embodiments of the utility model will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.
[0038] The following refers to Figures 1 to 6 The utility model is described as follows:
[0039] A parallel convection type heat exchange setting machine waste heat recovery device, including air inlet shell 10 and heat exchange channel 20, air inlet shell 10 is arranged at the front end of heat exchange channel 20;The cross section of heat exchange channel 20 is rectangular ring, the first partition plate 21 and the second partition plate 22 that are arranged in parallel are fixed in the inside of the front end of heat exchange channel 20, and the first air cavity 2001 is surrounded by the first partition plate 21, the second partition plate 22 and the front end inner wall of heat exchange channel 20;The third partition plate 23 and the fourth partition plate 24 that are arranged in parallel are fixed in the inside of the rear end of heat exchange channel 20, and the second air cavity 2002 is surrounded by the third partition plate 23, the fourth partition plate 24 and the rear end inner wall of heat exchange channel 20, the fourth partition plate 24 and the rear end inner wall of heat exchange channel 20 surround waste gas outlet cavity 2003, and the second partition plate 22, the third partition plate 23 and the middle segment inner wall of heat exchange channel 20 surround waste gas channel 2004;
[0040] The first air cavity 2001 and the second air cavity 2002 are communicated through a plurality of air heat exchange pipes 25, the front end of the air inlet shell 10 and the exhaust passage 2004 are communicated through a plurality of first exhaust pipes 26, and the rear end of the exhaust passage 2004 is connected with the exhaust outlet cavity 2003 through a plurality of second exhaust pipes 27;
[0041] The heat exchange passage 20 is provided with an air outlet connecting part 28 and an air inlet connecting part 29 at two ends, the air outlet connecting part 28 is communicated with the first air cavity 2001, and the air inlet connecting part 29 is communicated with the second air cavity 2002.
[0042] The high-temperature exhaust gas generated by the setting machine enters the air inlet shell, then enters the exhaust passage through the first exhaust pipe, flows backward along the exhaust passage and enters the flying exhaust outlet cavity through the second exhaust pipe; the heat of the high-temperature exhaust gas makes the first air cavity, the exhaust passage and the second air cavity full of heat
[0043] The air at normal temperature enters the second air cavity through the air inlet connecting part, then enters the first air cavity through the air heat exchange pipe, the heat in the second air cavity preliminarily heats the entering air, then the heat in the exhaust passage further heats the heat flowing through the air heat exchange pipe through the air heat exchange pipe, finally the air in the first air cavity is finally heated by the heat in the first air cavity, through three times of heating, the air at normal temperature of about 20 degrees Celsius is heated to about 170 degrees Celsius, and the exhaust temperature of the setting machine is reduced from about 200 degrees Celsius to about 50 degrees Celsius, the flow direction of the air and the flow direction of the exhaust gas are set in opposite and parallel convection, so that the heat in the high-temperature exhaust gas can be fully exchanged, and the utilization of energy is improved.
[0044] Both ends of the air heat exchange pipe 25 are inserted into and sealed and fixed on the second partition plate 22 and the third partition plate 23; the first exhaust pipe 26 penetrates the first air cavity 2001 and both ends thereof are inserted into and fixed on the first partition plate 21 and the second partition plate 22; the second exhaust pipe 27 penetrates the second air cavity 2002 and both ends thereof are inserted into and fixed on the third partition plate 23 and the fourth partition plate 24;
[0045] The cross section of the air heat exchange pipe 25 is a short rectangular pipe shape and a plurality of air heat exchange pipes 25 are arranged in a rectangular array; the cross sections of the first exhaust pipe 26 and the second exhaust pipe 27 are long rectangular pipe shapes and the two are arranged in front-to-back alignment;
[0046] A plurality of air heat exchange pipes 25 are arranged between adjacent two first exhaust pipes 26 and between adjacent two second exhaust pipes 27.
[0047] The number of air heat exchange pipes is much greater than that of waste gas pipes, so that the air heat exchange pipes can fully absorb the heat generated by the high-temperature waste gas, thereby achieving better heat exchange effect.
[0048] The outer wall of the air heat exchange pipe 25 is fixed with a plurality of fins 30, and the adjacent two side fins 30 are staggered in front and back.
[0049] Through the above technical scheme, the flow rate of the waste gas in the heat exchange channel can be reduced through the fins, so that the air heat exchange pipe can fully absorb heat, and the fins can also increase the heat absorption area of the air heat exchange pipe, thereby further improving the heat absorption.
[0050] The air inlet shell 10 is provided with an air inlet interface 101, and the air inlet shell 10 is provided with two air inlet channels 102 communicated with the air inlet interface 101, and each air inlet channel 102 is provided with a first air door 103, a filter screen 104 and a second air door 105; the air inlet shell 10 is provided with a transition chamber 106 communicated with the two air inlet channels 102, and the front end of the first waste gas pipe 26 extends into the transition chamber 106.
[0051] By providing two channels, the two channels can be switched for use, and the cleaning work of the filter screen can be facilitated.
[0052] When a certain air inlet channel works, the first air door and the second air door in the air inlet channel need to be opened.
[0053] The rear end of the heat exchange channel 20 is fixed with a waste gas connecting pipe 40, and the waste gas connecting pipe 40 is connected with the waste gas outlet chamber 2003.
[0054] The heat exchange channel 20 comprises an outer shell 201 and an inner shell 202 equidistantly arranged inside the outer shell 201, and the outer shell 201 and the inner shell 202 are filled with a heat insulation material 203.
[0055] The heat exchange channel is provided with inner and outer shells and filled with heat insulation material, which can effectively reduce the heat loss in the heat exchange channel.
[0056] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principle of the present application, a number of improvements and modifications can be made, and the above-mentioned improvements and modifications are also regarded as the protection scope of the present application.
Claims
1. A waste heat recovery device for a stenter with parallel convection heat exchange, comprising an air inlet shell (10) and a heat exchange channel (20), wherein the air inlet shell (10) is disposed at the front end of the heat exchange channel (20); characterized in that: The heat exchange channel (20) has a rectangular ring-shaped cross section. The front end of the heat exchange channel (20) is fixed with a first partition (21) and a second partition (22) arranged in parallel. The first partition (21), the second partition (22) and the inner wall of the front end of the heat exchange channel (20) form a first air cavity (2001). The rear end of the heat exchange channel (20) is fixed with a third partition (23) and a fourth partition (24) arranged in parallel. The third partition (23), the fourth partition (24) and the inner wall of the rear end of the heat exchange channel (20) form a second air cavity (2002). The fourth partition (24) and the inner wall of the rear end of the heat exchange channel (20) form a waste gas outlet cavity (2003). The second partition (22), the third partition (23) and the inner wall of the middle section of the heat exchange channel (20) form a waste gas channel (2004). The first air chamber (2001) and the second air chamber (2002) are connected by multiple air heat exchange pipes (25). The front end of the air inlet shell (10) and the exhaust gas passage (2004) are connected by multiple first exhaust gas pipes (26). The rear end of the exhaust gas passage (2004) is connected to the exhaust gas outlet chamber (2003) by multiple second exhaust gas pipes (27). The heat exchange channel (20) is provided with an air outlet connection (28) and an air inlet connection (29) at both ends. The air outlet connection (28) is connected to the first air chamber (2001), and the air inlet connection (29) is connected to the second air chamber (2002).
2. The waste heat recovery device for a stenter with parallel convection heat exchange according to claim 1, characterized in that: The two ends of the air heat exchange tube (25) are inserted and sealed on the second partition (22) and the third partition (23); the first exhaust pipe (26) passes through the first air cavity (2001) and its two ends are inserted and fixed on the first partition (21) and the second partition (22); the second exhaust pipe (27) passes through the second air cavity (2002) and its two ends are inserted and fixed on the third partition (23) and the fourth partition (24); The air heat exchange tube (25) has a short rectangular tube cross-section and multiple air heat exchange tubes (25) are arranged in a rectangular array; the first exhaust pipe (26) and the second exhaust pipe (27) have long rectangular tube cross-sections and are arranged in front and behind each other. Multiple air heat exchange tubes (25) are provided between two adjacent first exhaust pipes (26) and between two adjacent second exhaust pipes (27).
3. The waste heat recovery device for a stenter with parallel convection heat exchange according to claim 2, characterized in that: Several fins (30) are fixed on the outer wall of the air heat exchange tube (25), and the fins (30) on adjacent sides are staggered.
4. The waste heat recovery device for a stenter with parallel convection heat exchange according to claim 1, characterized in that: The air intake housing (10) is provided with an air intake interface (101) on the outside and two air intake channels (102) communicating with the air intake interface (101) are provided inside the air intake housing (10). Each air intake channel (102) is provided with a first damper (103), a filter screen (104) and a second damper (105). The air intake housing (10) is provided with a transition cavity (106) communicating with the two air intake channels (102). The front end of the first exhaust pipe (26) extends into the transition cavity (106).
5. The waste heat recovery device for a stenter with parallel convection heat exchange according to claim 1, characterized in that: The heat exchange channel (20) is fixed with a waste gas connection pipe (40) at its rear end, and the waste gas connection pipe (40) is connected to the waste gas outlet chamber (2003).
6. The waste heat recovery device for a stenter with parallel convection heat exchange according to claim 1, characterized in that: The heat exchange channel (20) includes an outer shell (201) and an inner shell (202) equidistantly disposed inside the outer shell (201), with a heat insulation material (203) filling the space between the outer shell (201) and the inner shell (202).