Heat exchanger for dyeing machine

Abstract

This utility model relates to a heat exchanger for a dyeing machine, comprising a cylindrical body with tube sheets connected to both ends. The tube sheets are evenly distributed with tube holes. Heat exchange tubes are connected between corresponding tube holes on both tube sheets. An inlet and an outlet are respectively located on opposite sides of the cylindrical wall near both ends of the body. A first cap is connected to the outer side of the tube sheet near the inlet, forming a first dye liquor chamber between the first cap and the adjacent tube sheet. The key feature is that a tube box and a second cap are sequentially connected to the outer side of the tube sheet near the outlet, with both ends of the tube box connected to the adjacent ends of the cylindrical body and the openings of the second cap, respectively. Dye liquor inlets and outlets are located on the lower and upper sides of the tube box, respectively. The dye liquor outlet and the outlet are located on the same side and their centerlines are parallel. A horizontal partition is located between the second cap and the adjacent tube sheet, with the surface of the partition perpendicular to the tube sheet, thus forming a second and a third dye liquor chamber below and above the partition, respectively. Using this utility model to heat the dye liquor can reduce energy waste and lower production costs. It is suitable for heat exchangers that use waste flue gas as the heat medium.

Description

Technical Field

[0001] This utility model relates to a heat exchanger. Specifically, it is a heat exchanger for dyeing machines used to heat the dyeing solution, and is particularly suitable for heat exchange where the waste flue gas generated during the heating of the dyeing solution is used as the heat medium. Background Technology

[0002] In the dyeing and printing industry, it is well known that heating the dyeing liquor is necessary to ensure dyeing quality during fabric dyeing. Chinese patent 202121655608.X discloses a heat exchanger for a dyeing machine. This heat exchanger uses the flame and flue gas generated by a burner to heat the heat exchange tubes, thereby exchanging heat with the dye liquor flowing through the tubes. Although this heat exchanger can heat the dye liquor, the limited time the flame and flue gas generate inside the cylinder heats the heat exchange tubes results in the flue gas exiting the heat exchanger cylinder remaining at a high temperature, reaching approximately 210 degrees Celsius. This high-temperature flue gas is directly released into the atmosphere, resulting in energy waste. Utility Model Content

[0003] The problem this invention aims to solve is to provide a heat exchanger for a dyeing machine. Using this heat exchanger to heat the dye liquor can reduce energy waste and lower production costs.

[0004] The above-mentioned problems to be solved by this utility model are achieved by the following technical solutions:

[0005] This utility model discloses a heat exchanger for a dyeing machine, comprising a cylindrical body with tube sheets connected to both ends. Corresponding tube holes are evenly distributed on each tube sheet. Heat exchange tubes are connected between the corresponding tube holes on both tube sheets. A smoke inlet is located on one side of the cylinder wall near one end of the cylinder, and a smoke outlet is located on the upper side of the cylinder wall near the other end of the cylinder. A first cap is connected to the outer side of the tube sheet near the smoke inlet, thus forming a first dye liquor chamber between the first cap and the adjacent tube sheet. The key feature is that a tube box and a second cap are sequentially connected to the outer side of the tube sheet near the smoke outlet. The diameter of the tube box, the diameter of the second cap, and the diameter of the cylinder are all the same. Both ends of the tube box are connected to the adjacent ends of the cylinder and the openings of the second cap, respectively. A dye liquor inlet and a dye liquor outlet are located on the lower and upper sides of the tube box, respectively, with their center lines coinciding. The dye liquor outlet and the smoke outlet are located on the same side, and their center lines are parallel. There is a horizontal partition between the second cap and the adjacent tube sheet. The surface of the partition is perpendicular to the tube sheet, thus forming a second dyeing chamber and a third dyeing chamber on the lower and upper sides of the partition, respectively.

[0006] The centerline of the smoke outlet is vertical.

[0007] A further improvement of this utility model is that upper and lower baffles are evenly distributed within the cylinder between the flue gas inlet and outlet. Both upper and lower baffles are circular plates adapted to the inner circle of the cylinder, and their surfaces are perpendicular to the longitudinal direction of the cylinder. The lower edge of the upper baffle and the upper edge of the lower baffle have cut-off edges, creating a first gap between the lower edge of the upper baffle and the corresponding side of the cylinder wall to facilitate the passage of dye liquor. The arcuate edges of the upper and lower baffles are respectively connected to the upper and lower inner walls of the cylinder. The upper and lower baffles are arranged alternately, and there is a second gap between adjacent upper and lower baffles to facilitate the passage of flue gas. Both the upper and lower baffles have corresponding tube holes for heat exchange tubes, which pass through the corresponding tube holes on the upper and lower baffles.

[0008] A further improvement of this utility model is that the opening of the second cover is connected to a flange, and the opening of the second cover is connected to the adjacent tube sheet by means of the flange.

[0009] As can be seen from the above scheme, since a tube box and a second cover are sequentially connected to the outer side of the tube sheet adjacent to the smoke outlet, the tube box has a dye liquor inlet and a dye liquor outlet on its lower and upper sides, respectively. A horizontal partition is located between the second cover and the adjacent tube sheet, and the surface of this partition is perpendicular to the tube sheet, thus forming a second dye liquor chamber and a third dye liquor chamber on the lower and upper sides of the partition, respectively. During operation, the waste gas discharged from the heat exchanger of the dyeing machine in the background art is sent into the cylinder of this utility model through pipes and a smoke inlet to heat the heat exchange tubes. The dye liquor enters the second dye liquor chamber through a water pump and a dye liquor inlet, and then sequentially passes through the heat exchange tube corresponding to the second dye liquor chamber, the first dye liquor chamber, and the heat exchange tube corresponding to the third dye liquor chamber before entering the third dye liquor chamber. Finally, it is sent to the dyeing machine to dye the fabric. Measurements show that after the dye liquor at 66 degrees Celsius is heated by the heat exchanger of this utility model, its temperature can increase to over 70 degrees Celsius. After the dye liquor at 119 degrees Celsius is passed through the heat exchanger of this invention, its temperature can be increased to over 123 degrees Celsius. This invention enables the reuse of waste flue gas, reducing energy waste and lowering production costs. Furthermore, because the dye liquor, after entering the second dye liquor chamber, sequentially passes through the heat exchange tube corresponding to the second dye liquor chamber, the first dye liquor chamber, and the heat exchange tube corresponding to the second dye liquor chamber before entering the second dye liquor chamber, the travel distance of the dye liquor within the heat exchanger is twice that of a traditional heat exchanger. This not only increases the heat exchange time and improves heat exchange efficiency but also further reduces production costs. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the heat exchanger structure for a dyeing machine according to this utility model. Detailed Implementation

[0011] like Figure 1As shown, the heat exchanger for the dyeing machine of this utility model includes a cylindrical body 3, which is horizontally arranged and connected to tube sheets 2 at both ends. Corresponding tube holes are evenly distributed on each tube sheet 2, and heat exchange tubes 4 are connected between the corresponding tube holes on both tube sheets 2. A smoke inlet 13 is machined on one side of the cylinder wall adjacent to one end of the cylindrical body 3, and a smoke outlet 6 is machined on the upper side of the cylinder wall adjacent to the other end of the cylindrical body 3. The centerline of the smoke inlet 13 is perpendicular to the centerline of the smoke outlet 6. A first cap 1 is connected to the outer side of the tube sheet 2 adjacent to the smoke inlet 13, thus forming a first dye liquor chamber 101 between the first cap 1 and the adjacent tube sheet 2. A tube box 9 and a second cap 11 are sequentially connected to the outer side of the tube sheet 2 adjacent to the smoke outlet 6. The diameter of the tube box 9, the diameter of the second cap 11, and the diameter of the cylindrical body 3 are all the same. The two ends of the tube box 9 are connected to the adjacent ends of the cylindrical body 3 and the openings of the second cap 11, respectively. The lower and upper sides of the tube box 9 are respectively machined with a dye liquor inlet 12 and a dye liquor outlet 8, and the center lines of the dye liquor inlet and outlet coincide. The dye liquor outlet 8 and the smoke outlet 6 are located on the same side and their center lines are parallel. A transverse partition 10 is provided between the second cover 11 and the adjacent tube plate 2. The surface of the transverse partition 10 is perpendicular to the tube plate 2, thereby forming a second dye liquor chamber 14 and a third dye liquor chamber 15 on the lower and upper sides of the transverse partition 10, respectively.

[0012] A further improvement of this utility model is that an upper baffle plate 51 and a lower baffle plate 52 are evenly distributed inside the cylinder 3 between the smoke inlet 13 and the smoke outlet 6. Both the upper baffle plate 51 and the lower baffle plate 52 are circular plates adapted to the inner circle of the cylinder 3, and their surfaces are perpendicular to the longitudinal direction of the cylinder 3. The lower edge of the upper baffle plate 51 and the upper edge of the lower baffle plate 52 are cut off, leaving a first gap between the lower edge of the upper baffle plate 51 and the upper edge of the lower baffle plate 52 and the corresponding side of the cylinder wall to facilitate the passage of dye liquor. The arcuate edges of the upper baffle plate 51 and the lower baffle plate 52 are respectively connected to the upper and lower inner walls of the cylinder 3. The upper and lower baffle plates are arranged alternately, and a second gap is left between adjacent upper and lower baffle plates to facilitate the passage of flue gas. Both the upper baffle 51 and the lower baffle 52 are machined with tube holes corresponding to the heat exchange tubes 4, and the corresponding heat exchange tubes 4 pass through the corresponding tube holes on the upper and lower baffles respectively.

[0013] A further improvement of this utility model is that the opening of the second cover 11 is connected to a flange 7, and the opening of the second cover 11 is connected to the adjacent tube sheet 2 by means of the flange 7 and bolts.

[0014] During operation, waste flue gas, acting as a heat transfer medium, is introduced into the cylinder to heat the heat exchange tubes. Simultaneously, the dye liquor to be heated is pumped into the second dye liquor chamber 14 via a water pump and dye liquor inlet 12. It then passes sequentially through the heat exchange tubes corresponding to the second dye liquor chamber 14, the first dye liquor chamber 101, and the heat exchange tubes corresponding to the third dye liquor chamber 15 before entering the third dye liquor chamber 15. Finally, the heated dye liquor is delivered to the dyeing machine to dye the fabric.

Claims

1. A heat exchanger for a dyeing machine, comprising a cylindrical body (3), the cylindrical body (3) being cylindrical, with tube sheets (2) connected to both ends: corresponding tube holes are evenly distributed on the tube sheets (2); heat exchange tubes (4) are connected between the corresponding tube holes on the two tube sheets (2); a smoke inlet (13) is located on one side of the cylinder wall adjacent to one end of the cylindrical body (3), and a smoke outlet (6) is located on the upper side of the cylinder wall adjacent to the other end of the cylindrical body (3); a first cover (1) is connected to the outer side of the tube sheet (2) adjacent to the smoke inlet (13), thereby forming a first dyeing liquid chamber (101) between the first cover (1) and the adjacent tube sheet (2); characterized in that: A tube box (9) and a second cover (11) are connected in sequence to the outside of the tube plate (2) adjacent to the smoke outlet (6). The diameter of the tube box (9), the diameter of the second cover (11) and the diameter of the cylinder (3) are all the same. The two ends of the tube box (9) are connected to the adjacent end of the cylinder (3) and the opening of the second cover (11) respectively. The tube box (9) has a dye inlet (12) and a dye outlet (8) on the lower and upper sides respectively. The center lines of the dye inlet and outlet coincide. The dye outlet (8) is located on the same side as the smoke outlet (6) and their center lines are parallel. There is a transverse partition (10) between the second cover (11) and the adjacent tube plate (2). The surface of the transverse partition (10) is perpendicular to the tube plate (2), so that a second dye chamber (14) and a third dye chamber (15) are formed on the lower and upper sides of the transverse partition (10) respectively.

2. The heat exchanger for a dyeing machine according to claim 1, characterized in that: The centerline of the smoke inlet (13) is perpendicular to the centerline of the smoke outlet (6).

3. The heat exchanger for a dyeing machine according to claim 1, characterized in that: Upper baffles (51) and lower baffles (52) are evenly distributed inside the cylinder (3) between the smoke inlet (13) and the smoke outlet (6). Both upper baffles (51) and lower baffles (52) are circular plates adapted to the inner circle of the cylinder (3), and their plate surfaces are perpendicular to the longitudinal direction of the cylinder (3). The lower edge of the upper baffle (51) and the upper edge of the lower baffle (52) have cut edges, so that the lower edge of the upper baffle (51) and the upper edge of the lower baffle (52) are evenly distributed with the cylinder wall on the corresponding side. There is a first gap to facilitate the passage of dye liquor; the arc edge of the upper baffle (51) and the arc edge of the lower baffle (52) are respectively connected to the upper inner wall and the lower inner wall of the cylinder (3); the upper and lower baffles are arranged alternately, and there is a second gap between adjacent upper and lower baffles to facilitate the passage of flue gas; the upper baffle (51) and the lower baffle (52) have pipe holes corresponding to the heat exchange tube (4), and the heat exchange tube (4) passes through the corresponding pipe holes on the upper and lower baffles respectively.

4. The heat exchanger for a dyeing machine according to any one of claims 1 to 3, characterized in that: The opening of the second cover (11) is connected to a flange (7), and the opening of the second cover (11) is connected to the adjacent tube sheet (2) by means of the flange (7).

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