An energy-saving dye bath heating device

Abstract

This utility model discloses an energy-saving dye bath heating device, relating to the field of dyeing and printing technology. It includes a dye bath heating device body with an inlet, an outlet, and a flue gas outlet. The dye bath slurry enters the body through the inlet for heat exchange and exits through the outlet. The flue gas after heat exchange exits the body through the flue gas outlet. It also includes a preheating zone to recover the flue gas from the flue gas outlet to heat the dye bath, and to inject the heated dye bath into the body through the inlet for further heating. The preheating zone includes: a preheating tank for receiving the flue gas from the flue gas outlet; a dye bath preheating pipe for transporting the dye bath and passing it through the inside of the preheating tank, where the slurry in the preheating pipe exchanges heat with the flue gas inside the preheating tank; and a segmented buffer structure disposed inside the preheating tank.

Description

Technical Field

[0001] This utility model relates to the field of printing and dyeing technology, and in particular to an energy-saving dye bath heating device. Background Technology

[0002] As a traditional high-energy-consuming industry, the dyeing and printing industry faces enormous pressure to reduce carbon emissions. Most regions are promoting the use of clean energy, thus creating a significant need for upgrading and retrofitting production enterprises that rely on coal-fired boilers. Currently, to reduce energy loss and environmental pollution, gas-fired heating devices for dyeing vats are being used.

[0003] In the prior art, patent application number CN202411170850.6, titled "Gas-fired Heating Device for Dyeing and Printing Vats," describes a device that is small in size, low in energy consumption, and safe and reliable. The technical solution is a gas-fired heating device for dyeing and printing vats, comprising a heat exchange unit and a combustion unit. The heat exchange unit has a first channel and a second channel arranged internally and externally, as well as several heat exchange tubes passing through both channels. One side of the heat exchange unit has a water inlet, and the other side has a water outlet, a flue gas inlet, and a flue gas outlet. The flue gas inlet, the first channel, the second channel, and the flue gas outlet are sequentially connected, with the flue gas flow directions of the first and second channels being opposite. The combustion unit is connected to the flue gas inlet. The water inlet, the heat exchange tubes, and the water outlet are sequentially connected. In this solution, the combustion unit, which supplies heat, transports high-temperature flue gas through the first and second channels, and, in conjunction with the heat exchange unit, achieves gas-fired heating of the dyeing and printing vat. The flue gas, carrying residual heat after heat exchange, is directly discharged.

[0004] To further improve the utilization rate of gas energy and reduce energy loss, we will further utilize the flue gas with residual heat after heating to create a more energy-efficient heating device. Therefore, we will design an energy-saving dye bath heating device based on the gas-fired heating device for dyeing vats. Utility Model Content

[0005] The purpose of this invention is to provide an energy-saving dye bath heating device to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses an energy-saving dye bath heating device, comprising a dye bath heating device body, which has an inlet, an outlet, and a flue gas outlet. The dye bath liquor enters the dye bath heating device body through the inlet for heat exchange and exits through the outlet. The flue gas after heat exchange exits the dye bath heating device body through the flue gas outlet. The device also includes a preheating zone, which recovers the flue gas discharged from the flue gas outlet to heat the dye bath and allows the heated dye bath to be injected into the dye bath heating device body through the inlet for further heating. The preheating zone includes:

[0008] A preheating tank, the preheating tank being used to receive the flue gas discharged from the exhaust port;

[0009] A dye liquor preheating tube is used to transport dye liquor and pass it through the inside of the preheating tank, and the slurry in the dye liquor preheating tube inside the preheating tank exchanges heat with the flue gas in the preheating tank.

[0010] And a segmented buffer structure, which is disposed inside the preheating tank to buffer the flow rate of flue gas by segmenting and intercepting the flue gas entering the preheating tank.

[0011] Furthermore, the preheating tank is provided with an inlet pipe at one end that connects to the exhaust port, and an exhaust pipe at the other end for discharging flue gas.

[0012] Furthermore, the dye liquor preheating tube has a spiral tube structure. The spiral tube is installed inside the preheating tank, and both ends of the dye liquor preheating tube extend out from both ends of the dye liquor preheating tube. The end of the dye liquor preheating tube on the same side as the flue gas inlet pipe is connected to the water inlet.

[0013] Furthermore, a heat-conducting plate is vertically connected to the outside of the dye liquor preheating tube, and the heat-conducting plate extends along the spiral structure of the dye liquor preheating tube in a spiral structure.

[0014] Furthermore, the segmented buffer structure includes multiple buffer baffles, which are uniformly distributed along the axial direction of the preheating tank and fixedly connected to the inner wall of the preheating tank. Each buffer baffle has a conical structure and a flue gas vent is provided at its center to allow the dye liquor preheating pipe and flue gas to pass through.

[0015] Furthermore, multiple buffer baffles are distributed at the spiral structure section of the dye liquor preheating tube.

[0016] This utility model has the following beneficial effects.

[0017] This invention adds a preheating zone to the front end of the existing gas-fired heating device for dyeing vats. By recovering the heat energy of the flue gas with residual heat after heat exchange, the dye liquor is preheated. The heated dye liquor is then injected into the gas-fired heating device for final heating. This reduces heating energy consumption during the heating stage of the gas-fired heating device, while recovering and utilizing the flue gas with residual heat after heat exchange, improving the utilization rate of gas energy, reducing energy loss, and forming a more energy-efficient dye liquor heating device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 A schematic diagram of the structure of an energy-saving dye bath heating device provided in this embodiment of the present invention;

[0020] Figure 2 A cross-sectional view of the preheating zone of an energy-saving dyeing vat dye liquor heating device provided in an embodiment of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Dye liquor heating device body; 2. Water inlet; 3. Water outlet; 4. Smoke outlet; 5. Preheating tank; 6. Dye liquor preheating pipe; 7. Smoke inlet pipe; 8. Smoke outlet pipe; 9. Heat-conducting plate; 10. Buffer baffle; 11. Smoke vent. Detailed Implementation

[0023] To enable those skilled in the art to better understand the technical solution of this utility model, a further detailed description of this utility model will be provided below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] See Figures 1 to 2 As shown;

[0025] This embodiment discloses an energy-saving dye bath heating device, including a dye bath heating device body 1, which is a prior art device for heating dye bath. The dye bath heating device body 1 has an inlet 2, an outlet 3, and a flue gas outlet 4. The slurry enters the dye bath heating device body 1 through the inlet 2 for heat exchange and is discharged through the outlet 3. The flue gas after heat exchange is discharged from the dye bath heating device body 1 through the flue gas outlet 4. It also includes a preheating zone, which is used to recover the flue gas discharged from the flue gas outlet 4 to heat the dye bath and inject the heated dye bath into the dye bath heating device body 1 through the inlet 2 for heating. That is, we preheat the dye bath by recovering the flue gas with residual heat discharged from the flue gas outlet 4 to achieve energy saving. The preheating zone includes:

[0026] The preheating tank 5 is used to receive the flue gas discharged from the exhaust port 4, so that the preheating tank 5 continuously supplies the flue gas discharged from the exhaust port 4 to preheat the dye liquor.

[0027] The dye liquor preheating pipe 6 is used to transport the dye liquor and pass it through the inside of the preheating tank 5. The slurry in the dye liquor preheating pipe 6 inside the preheating tank 5 exchanges heat with the flue gas in the preheating tank 5. After heat exchange, the dye liquor enters the dyeing vat dye liquor heating device body 1 for final heating. The flue gas used for heating in the dyeing vat dye liquor heating device body 1 is then recovered to achieve the function of waste heat energy recovery and utilization, so as to preheat the dye liquor. This greatly saves energy consumption in the final heating stage of the dye liquor in the dyeing vat dye liquor heating device body 1, or increases the flow rate of the dye liquor during heat exchange in the dyeing vat dye liquor heating device body 1, thereby improving the heating speed of the dye liquor.

[0028] In addition, a segmented buffer structure is installed inside the preheating tank 5 to intercept the flue gas entering the preheating tank 5 in segments to buffer the flow rate of the flue gas. The flue gas flow rate is buffered, which allows it to contact the dye liquor preheating pipe 6 more fully and exchange heat with the dye liquor more fully, thus ensuring the heating effect of the preheating zone on the dye liquor.

[0029] Furthermore, the preheating tank 5 is provided with an inlet pipe 7 connected to the exhaust port 4 at one end and an exhaust pipe 8 at the other end for discharging flue gas. The flue gas discharged from the exhaust port 4 is transported into the preheating tank 5 through the inlet pipe 7, and after heat exchange in the preheating tank 5, it is discharged from the exhaust pipe 8.

[0030] Furthermore, the dye liquor preheating tube 6 has a spiral tube structure, which allows the part of the dye liquor preheating tube 6 inside the preheating tank 5 to fully contact and exchange heat with the flue gas carrying residual heat. The spiral tube structure of the dye liquor preheating tube 6 is set inside the preheating tank 5, and the two ends of the dye liquor preheating tube 6 extend from the two ends of the dye liquor preheating tube 6 respectively. One end of the dye liquor preheating tube 6 on the same side as the flue gas inlet pipe 7 is connected to the water inlet 2. Therefore, the other end of the dye liquor preheating tube 6 is the port for inputting dye liquor. After the dye liquor is input into the dye liquor preheating tube 6 for heat exchange, it is sent to the water inlet 2 through the other end and enters the dyeing tank dye liquor heating device body 1 for final heat exchange.

[0031] Furthermore, a heat-conducting plate 9 is vertically connected to the outside of the dye liquor preheating tube 6. The heat-conducting plate 9 extends along the spiral structure of the dye liquor preheating tube 6 and is arranged in a spiral structure. That is, the heat-conducting plate 9 is arranged along the spiral structure of the dye liquor preheating tube 6 and also forms a spiral structure, which can increase the contact area between the dye liquor preheating tube 6 and the flue gas and further improve the heat exchange efficiency.

[0032] Furthermore, the segmented buffer structure includes multiple buffer baffles 10, which are uniformly distributed along the axial direction of the preheating tank 5 and fixedly connected to the inner wall of the preheating tank 5. The buffer baffles 10 are conical in shape and have a flue gas inlet 11 at their center to allow the dye liquor preheating pipe 6 and the flue gas to pass through. The inner diameter of the flue gas inlet 11 is designed to be as close as possible to the size of the dye liquor preheating pipe 6 and the heat-conducting plate 9.

[0033] Furthermore, multiple buffer baffles 10 are distributed at the spiral structure section of the dye liquor preheating tube 6.

[0034] Specifically, the distribution of multiple buffer baffles 10 allows the flue gas to be better concentrated around the spiral structure section of the dye liquor preheating tube 6. The conical buffer baffles 10 concentrate the flue gas in its flow direction until it reaches the flue gas inlet 11. When the flue gas reaches the flue gas inlet 11, it encounters the spiral structure of the dye liquor preheating tube 6 and the heat-conducting plate 9, causing the flue gas to flow along the spiral structure, further concentrating the flue gas around the spiral structure section of the dye liquor preheating tube 6, allowing for better contact and heat exchange with the dye liquor preheating tube 6 and the heat-conducting plate 9, thereby improving the preheating effect of the preheating zone on the dye liquor.

[0035] In the above technical solution, the energy-saving dye bath heating device provided by this utility model has the following beneficial effects:

[0036] This invention adds a preheating zone to the front end of the existing gas-fired heating device for dyeing vats. By recovering the heat energy of the flue gas with residual heat after heat exchange, the dye liquor is preheated. The heated dye liquor is then injected into the gas-fired heating device for final heating. This reduces heating energy consumption during the heating stage of the gas-fired heating device, while recovering and utilizing the flue gas with residual heat after heat exchange, improving the utilization rate of gas energy, reducing energy loss, and forming a more energy-efficient dye liquor heating device.

[0037] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. An energy-saving dye bath heating device, comprising a dye bath heating device body (1), wherein the dye bath heating device body (1) has an inlet (2), an outlet (3), and a flue gas outlet (4), wherein the slurry enters the dye bath heating device body (1) through the inlet (2) for heat exchange and is discharged through the outlet (3), and the flue gas after heat exchange is discharged from the dye bath heating device body (1) through the flue gas outlet (4), characterized in that, It also includes a preheating zone, which is used to recover the flue gas discharged from the exhaust port (4) to heat the dye liquor and allow the heated dye liquor to be injected from the water inlet (2) into the dyeing vat dye liquor heating device body (1) for heating. The preheating zone includes: A preheating tank (5) is used to receive the flue gas discharged from the exhaust port (4); The dye liquor preheating tube (6) is used to transport the dye liquor and pass it through the inside of the preheating tank (5). The slurry in the dye liquor preheating tube (6) inside the preheating tank (5) exchanges heat with the flue gas in the preheating tank (5). And a segmented buffer structure, which is disposed inside the preheating tank (5) to buffer the flow rate of flue gas by segmenting and intercepting the flue gas entering the preheating tank (5).

2. The energy-saving dye bath heating device according to claim 1, characterized in that, The preheating tank (5) is provided with a smoke inlet pipe (7) connected to the smoke outlet (4) at one end and a smoke outlet pipe (8) at the other end for discharging smoke.

3. The energy-saving dye bath heating device according to claim 2, characterized in that, The dye liquor preheating tube (6) has a spiral tube structure. The dye liquor preheating tube (6) with the spiral tube structure is located inside the preheating tank (5), and both ends of the dye liquor preheating tube (6) extend from both ends of the dye liquor preheating tube (6). One end of the dye liquor preheating tube (6) on the same side as the smoke inlet pipe (7) is connected to the water inlet (2).

4. The energy-saving dye bath heating device according to claim 3, characterized in that, A heat-conducting plate (9) is vertically connected to the outside of the dye preheating tube (6), and the heat-conducting plate (9) extends along the spiral structure of the dye preheating tube (6) to form a spiral structure.

5. The energy-saving dye bath heating device according to claim 1, characterized in that, The segmented buffer structure includes multiple buffer baffles (10), which are uniformly distributed along the axial direction of the preheating tank (5) and fixedly connected to the inner wall of the preheating tank (5). The buffer baffles (10) are conical structures and have a flue gas inlet (11) in their center to allow the dye liquor preheating pipe (6) and flue gas to pass through.

6. The energy-saving dye bath heating device according to claim 5, characterized in that, Multiple buffer baffles (10) are distributed in the spiral structure section of the dye preheating tube (6).

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