Energy-saving and environment-friendly printing and dyeing equipment and printing and dyeing method

Abstract

The invention relates to the technical field of printing and dyeing, and provides energy-saving and environment-friendly printing and dyeing equipment which comprises a heat preservation shell, a spiral drying channel is arranged in the heat preservation shell and vertically arranged in the heat preservation shell, and a feeding opening for fabric entering is formed in a top channel opening of the spiral drying channel; a bottom channel opening, away from the feeding port, of the spiral drying channel is provided with a discharging port, a supporting device is arranged in the spiral drying channel, a hot air device is arranged at the bottom channel opening, away from the feeding port, of the spiral drying channel, an air outlet pipeline is arranged at a top channel opening, close to the feeding port, of the spiral drying channel, and a recycling device is arranged in the air outlet pipeline. Driving devices used for driving the fabric to move are arranged at the two ends of the spiral drying channel. By means of the technical scheme, the problems that in the prior art, printing and dyeing drying equipment is large in size and large in occupied space, hot air can only flow through one side of fabric, drying on the two sides of the fabric is unbalanced, and the drying efficiency is low are solved.

Description

Technical Field

[0001] The invention relates to the technical field of printing and dyeing, and in particular to energy-saving and environment-friendly printing and dyeing equipment and a printing and dyeing method. Background Art

[0002] Printing and dyeing is an extremely important link in the textile industry. It aims to evenly attach dyes to fabrics through chemical or physical methods to give them rich colors and patterns. The printing and dyeing process is not only about giving fabrics color, but also includes multiple steps such as pretreatment, dyeing, and finishing. These processes together determine the color fastness, appearance texture, and service life of the fabric. As people's requirements for environmental protection and sustainable development continue to increase, how to achieve energy conservation and emission reduction while maintaining printing and dyeing quality has become the focus of the industry. In the prior art, fabric printing and dyeing mainly includes the following main steps: pretreatment, dyeing, drying, and finishing.

[0003] In the drying step of printing and dyeing, there are still some technical deficiencies in the existing drying equipment. Most of the current drying equipment is usually bulky and bulky, resulting in a large space occupation. In addition, the existing drying equipment mostly uses flowing hot air for drying, but these devices usually can only allow hot air to flow from one side of the fabric, resulting in uneven drying effects on both sides of the fabric, especially for some fabrics with poor air permeability (such as heavy fabrics or synthetic materials). This drying method is inefficient and may cause one side to be dry while the other side is still wet, affecting the overall drying efficiency and quality. Summary of the invention

[0004] The present invention provides an energy-saving and environment-friendly printing and dyeing device and a printing and dyeing method which have a compact structure, high drying efficiency and can evenly dry both sides of a fabric, thereby achieving fast and even drying of different types of fabrics, reducing energy consumption and improving production efficiency.

[0005] The technical solution of the present invention is as follows: An energy-saving and environment-friendly printing and dyeing equipment comprises a heat-insulating shell, a spiral drying channel is arranged in the heat-insulating shell, the spiral drying channel is vertically arranged in the heat-insulating shell, a top channel opening of the spiral drying channel is provided with a feed port for fabric to enter, a bottom channel opening of the spiral drying channel away from the feed port is provided with a discharge port, a supporting device for keeping the fabric always located in the middle of the spiral drying channel is provided in the spiral drying channel, a hot air device for drying the fabric is provided at the bottom channel opening of the spiral drying channel away from the feed port, an air outlet duct is provided at the top channel opening of the spiral drying channel close to the feed port, the air outlet duct extends to the outside of the heat-insulating shell, a recovery device for recovering heat for reuse is provided in the air outlet duct, and driving devices for driving the fabric to move are provided at both ends of the spiral drying channel.

[0006] Furthermore, the support structure includes a plurality of support rollers, the plurality of support rollers are arranged along a spiral roller channel, the support rollers are located in the middle of the spiral drying channel, and the support rollers are rotationally connected to the spiral drying channel.

[0007] Furthermore, the surface of the support roller is an arc-shaped surface, the diameter in the middle of the support roller is larger than the diameter on both sides thereof, and the diameter of the support roller gradually decreases from the middle to both sides thereof.

[0008] Furthermore, the hot air device includes an air inlet channel, an electric heating pipe, and an air inlet fan. The air inlet channel is connected to the bottom channel opening of the spiral drying channel. The electric heating pipe is located in the air inlet channel. An air inlet fan is provided on the side of the electric heating pipe away from the connection between the air inlet channel and the spiral drying channel.

[0009] Furthermore, an annular air outlet channel is provided at the connection between the air inlet channel and the spiral drying channel, and the annular air outlet channel is connected to the air inlet channel and the spiral drying channel. A flat-mouth air outlet is provided at the connection between the annular air outlet channel and the spiral drying channel, and the flat-mouth air outlet is inclined toward the top of the spiral drying channel.

[0010] Furthermore, the air outlet duct extends to the bottom of the protective shell and extends to the lower side of the air inlet channel. The heat-insulating shell is provided with an air outlet, and the air outlet is connected to the end of the air outlet duct. The recovery device includes a heat exchange tube and a plurality of fins. The heat exchange tube is filled with a cooling medium. A portion of the heat exchange tube is located in the air inlet channel, and another portion of the heat exchange tube is located in the air outlet duct. The heat exchange tubes in the air inlet channel and the air outlet duct constitute a heat exchange circuit. A plurality of the fins are evenly distributed in the air inlet channel and the air outlet duct. A plurality of the fins are linearly arranged along the heat exchange tubes. The fins are parallel to the air inlet channel or the air outlet duct, and the heat exchange tubes pass through the fins and are fixedly connected to the fins.

[0011] Furthermore, the air outlet duct is provided with a drain outlet, the drain outlet is located below the heat exchange tube, the drain outlet is inclined toward the drain outlet on all sides, the drain outlet is connected to a drain pipe, and the drain pipe extends outside the insulation shell and extends out of the insulation shell.

[0012] Furthermore, a first temperature sensor, a second temperature sensor and a humidity sensor are provided in the air inlet channel, the first temperature sensor is located between the recovery device and the electric heating tube, the second temperature sensor and the humidity sensor are both located on the side of the electric heating tube away from the recovery device, the first temperature sensor and the humidity sensor are both fixedly connected to the air inlet channel, the insulation shell is provided with a controller, and the first temperature sensor, the second temperature sensor, the humidity sensor, the electric heating tube, the air inlet fan, and the drive motor are all electrically connected to the controller.

[0013] Furthermore, the driving device includes two driving rollers and a driving motor, the two driving rollers are respectively located at two channel openings of the spiral drying channel, the driving rollers are rotatably connected to the insulation shell, the two driving motors are fixedly connected to the insulation shell or the spiral drying channel, and the driving motor is connected to the driving rollers.

[0014] A printing and dyeing method of energy-saving and environment-friendly printing and dyeing equipment, comprising the following printing and dyeing steps: S1. Prepare fabrics to be dried; S2, putting one end of the fabric to be dried into the spiral drying channel from the feed inlet, and contacting it with the driving roller near the feed inlet, the supporting roller, and the driving roller near the discharge port in sequence along the spiral drying channel, ensuring that the fabric is unfolded on the driving roller and the supporting roller; S3, start the electric heating tube to make it reach a preset temperature; S4, start the air inlet fan, heat the air through the electric heating tube and send it into the spiral drying channel to dry the fabric; S5, outputting the dried fabric from the discharge port.

[0015] The working principle and beneficial effects of the present invention are: The present invention adopts the design of a spiral drying channel to make the structure of the entire device more compact. The spiral layout not only increases the drying path of the fabric, but also saves floor space, effectively solving the problem that traditional drying equipment is large in size and occupies too much space. At the same time, by arranging a supporting device in the spiral drying channel, the fabric is fixed in the middle of the spiral drying channel by the supporting device, and hot air flows upward from the bottom of the spiral drying channel to ensure that the air can evenly contact every part of the fabric, especially for fabrics with poor air permeability, it can ensure that both sides are evenly dried to avoid the problem of low drying efficiency. The present invention combines an insulating shell, a reasonable airflow design, a hot air device, and a recovery device, effectively reducing heat loss, improving thermal energy utilization, and making the equipment more energy-saving and environmentally friendly. At the same time, the circulation of hot air reduces energy waste and improves the overall drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a front view of the present invention; Figure 3 It is a top view of the present invention; Figure 4 for Figure 2 Sectional view at AA; Figure 5 for Figure 2 A magnified image of point A; Figure 6 for Figure 3 Cross-sectional view at BB; Figure 7 for Figure 6 Diagram of the internal structure of the spiral drying channel.

[0018] In the figure: 1. Insulation shell; 2. Electric heating tube; 3. Spiral drying channel; 4. Air inlet channel; 5. Air outlet duct; 6. Recovery device; 7. Drain pipe; 8. Controller; 11. Feed inlet; 12. Discharge port; 31. Support roller; 32. Drive roller; 33. Drive motor; 34. Annular air outlet channel; 41. Air inlet fan; 51. Air outlet; 61. Heat exchange tube; 62. Fin; 71. Drain port; 81. First temperature sensor; 82. Second temperature sensor; 83. Humidity sensor. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] like Figure 1 to Figure 7 As shown, this embodiment proposes an energy-saving and environment-friendly printing and dyeing equipment, including a heat-insulating shell 1, a spiral drying channel 3 is arranged in the heat-insulating shell 1, the spiral drying channel 3 is vertically arranged in the heat-insulating shell 1, a feed port 11 for fabric to enter is arranged at the top channel opening of the spiral drying channel 3, a discharge port 12 is arranged at the bottom channel opening of the spiral drying channel 3 away from the feed port 11, a supporting device for keeping the fabric always located in the middle of the spiral drying channel 3 is arranged in the spiral drying channel 3, a hot air device for drying the fabric is arranged at the bottom channel opening of the spiral drying channel 3 away from the feed port 11, an air outlet duct 5 is arranged at the top channel opening of the spiral drying channel 3 close to the feed port 11, the air outlet duct 5 extends to the outside of the heat-insulating shell 1, a recovery device 6 for recovering heat for reuse is arranged in the air outlet duct 5, and driving devices for driving the fabric to move are arranged at both ends of the spiral drying channel 3.

[0021] The heat-insulating shell 1 is used to seal the internal structure of the entire drying equipment to prevent heat loss and isolate the influence of external temperature. Through the heat-insulating design, energy waste can be reduced, heat energy utilization can be improved, and a more efficient drying process can be achieved. At the same time, keeping the temperature in the equipment stable helps the fabric to dry evenly. The spiral drying channel 3 is vertically arranged in the heat-insulating shell 1 to ensure that hot air flows upward from the bottom and dries the fabric along the channel. The structure of the spiral drying channel 3 increases the contact area between the hot air and the fabric to ensure that the air can circulate. The fabric enters the spiral drying channel 3 from the feed port 11 and is output from the discharge port 12 after drying. The vertical spiral structure saves a lot of space. Compared with traditional equipment, it can make the equipment more compact and effectively solve the problem of bulky volume. The support device fixes the fabric in the middle of the spiral drying channel 3, ensuring the drying effect on both sides of the fabric, so that both sides can be dried at the same time, ensuring that the hot air can evenly contact both sides of the fabric, and improving the drying efficiency. The hot air device heats the air and then inputs it into the spiral drying channel 3 from the bottom. The hot air moves from the bottom of the spiral drying channel 3 to the top, and dries the fabric during the movement. The setting of the hot air device ensures that the fabric near the bottom can be exposed to the dry hot air at the first time, and the fabric can effectively and timely discharge the excess moisture inside it to achieve a predetermined drying effect. The air outlet duct 5 is connected to the top of the drying channel to discharge hot air and water vapor. By discharging hot air from the top, it can ensure that the air flow in the entire device flows smoothly, avoid air retention inside the device, ensure that humidity does not accumulate in the device, and help maintain an efficient drying effect. The drive device drives the fabric to move, so that it moves in an orderly manner and performs large-scale drying.

[0022] In this embodiment, the support structure includes a plurality of support rollers 31, which are arranged along the spiral roller channel, and the support rollers 31 are located in the middle of the spiral drying channel 3, and the support rollers 31 are rotatably connected to the spiral drying channel 3. The surface of the support roller 31 is an arc surface, and the diameter of the middle of the support roller 31 is larger than the diameter of the two sides thereof, and the diameter of the support roller 31 gradually decreases from the middle to the two sides thereof.

[0023] The support rollers 31 are arranged along the spiral drying channel 3 and fixed in the middle of the spiral drying channel 3 to support and fix the fabrics to keep them stable during the drying process. The surfaces of these rollers are curved, with a wide middle and narrow sides to ensure that the fabrics can be fully unfolded, avoid folding or stacking, and maximize the contact area with hot air, thereby improving the uniformity of drying.

[0024] In this embodiment, the hot air device includes an air inlet channel 4, an electric heating tube 2, and an air inlet fan 41. The air inlet channel 4 is connected to the bottom channel opening of the spiral drying channel 3. The electric heating tube 2 is located in the air inlet channel 4. The air inlet fan 41 is arranged on the side of the electric heating tube 2 away from the connection between the air inlet channel 4 and the spiral drying channel 3. An annular air outlet channel 34 is arranged at the connection between the air inlet channel 4 and the spiral drying channel 3. The annular air outlet channel 34 is connected to the air inlet channel 4 and the spiral drying channel 3. A flat-mouth air outlet 51 is arranged at the connection between the annular air outlet channel 34 and the spiral drying channel 3. The flat-mouth air outlet 51 is inclined toward the top of the spiral drying channel 3.

[0025] The air inlet channel 4 is connected to the bottom of the spiral drying channel 3. After the electric heating tube 2 heats the air, the air inlet fan 41 pushes the hot air into the drying channel from the bottom. The design of the air inlet channel 4 ensures that the hot air can flow upward from the bottom, pushing heat and moisture through both sides of the fabric. At the same time, the flow of hot air from bottom to top can ensure that the bottom fabric can be thoroughly dried, and its drying effect will not be affected by the increase in humidity in the air. The electric heating tube 2 serves as a heat source to heat the air in the air inlet channel 4 and provide hot air for drying. The electric heating tube 2 can heat the air quickly and evenly, thereby providing a continuous heat supply for the equipment. The annular air outlet channel 34 is located between the air inlet channel 4 and the spiral drying channel 3, and is used to evenly distribute the hot air entering the spiral drying channel 3. The annular design increases the path for the hot air to flow, so that the air entering the spiral drying channel 3 is more evenly distributed, avoiding local overheating or poor air flow, thereby improving the heat utilization rate and ensuring that the fabric is dried evenly throughout the channel. The flat-mouth air outlet 51 is designed so that when the air enters the spiral drying channel 3 from the annular air outlet channel 34, it is blown upward at a specific angle and flow rate, directly acting on the top of the drying channel. The inclined flat-mouth air outlet 51 design ensures that the hot air can flow upward quickly from the bottom, evenly covering the entire height of the spiral drying channel 3, so that the fabrics on the lower layer can also be fully dried. In addition, the air flow direction is optimized, reducing air stagnation, and further improving drying efficiency and uniformity.

[0026] In this embodiment, the air outlet duct 5 extends to the bottom of the protective shell and extends to the lower side of the air inlet channel 4. The insulation shell 1 is provided with an air outlet 51, and the air outlet 51 is connected to the end of the air outlet duct 5. The recovery device 6 includes a heat exchange tube 61 and a plurality of fins 62. The heat exchange tube 61 is filled with a cooling medium. A portion of the heat exchange tube 61 is located in the air inlet channel 4, and another portion of the heat exchange tube 61 is located in the air outlet duct 5. The heat exchange tubes 61 in the air inlet channel 4 and the air outlet duct 5 form a heat exchange circuit. A plurality of fins 62 are evenly distributed in the air inlet channel 4 and the air outlet duct 5. A plurality of fins 62 are linearly arranged along the heat exchange tube 61. The fins 62 are parallel to the air inlet channel 4 or the air outlet duct 5. The heat exchange tube 61 passes through the fins 62 and is fixedly connected to the fins 62.

[0027] By extending the air outlet duct 5 from the top to the bottom of the shell and connecting it to the lower side of the air inlet channel 4, the hot air can be recycled inside the device through the recovery device 6. This design reduces the external loss of heat, so that the residual energy in the hot air can be reused, thereby reducing the overall energy consumption of the equipment and improving the thermal efficiency, with significant energy-saving effects. The air outlet 51 is used to discharge the air after energy recovery in the air outlet duct 5. The recovery device 6 is mainly used to recover the heat in the hot air after drying. The recovery device 6 can make full use of the residual heat in the hot air, reduce the burden on the electric heating tube 2, and thus reduce energy consumption. At the same time, the reasonable layout enables the equipment to improve the overall energy-saving performance without reducing the drying efficiency.

[0028] The heat exchange tube 61 is filled with a cooling medium for absorbing heat from hot air. The heat exchange tube 61 absorbs heat through the cooling medium and preheats the cold air in the air inlet channel 4. This structure reduces the dependence on electric heating through the heat exchange process, making the initial temperature of the incoming air higher, thereby further reducing energy consumption and improving drying efficiency. The cooling medium can be water, which has a large thermal capacity, high efficiency in absorbing and transferring heat, and good heat exchange effect. A number of fins 62 are evenly distributed on the heat exchange tube 61 to increase the heat exchange area and accelerate the exchange and dissipation of heat. The design of the fins 62 increases the heat exchange area, allowing the heat exchange tube 61 to more efficiently absorb heat from the hot air and transfer it to the cooling medium. This structural design improves the overall heat exchange efficiency and makes the energy utilization of the equipment more effective. In order to improve the efficiency of the recovery device 6, a plurality of annular heat exchange tubes 61 may be provided and arranged in sequence, with the two ends of the annular heat exchange tubes 61 respectively located in the air inlet channel 4 and the air outlet duct 5, and vertically passing through the fins 62 located in the air inlet channel 4 and the air outlet duct 5, and fixedly connected to the fins 62. Such an arrangement may form a plurality of independent heat cycles, and the individual heat cycles may conduct heat more directly and effectively, thereby improving the overall heat recovery efficiency.

[0029] In this embodiment, the air outlet duct 5 is provided with a drain port 71, which is located below the heat exchange tube 61. The drain port 71 is inclined toward the drain port 71 on all sides. The drain port 71 is connected to a drain pipe 7, which extends outside the insulation shell 1 and extends out of the insulation shell 1.

[0030] The drain port 71 is designed below the heat exchange tube 61 to discharge the water generated during the condensation process. The drain pipe 7 extends to the outside of the shell to facilitate the centralized discharge of water. The design of the drain port 71 ensures that the condensed water can be discharged smoothly, avoiding water accumulation in the equipment and ensuring the long-term stable operation of the equipment. This design not only prevents the accumulation of moisture inside the equipment, but also simplifies the drainage system, ensuring convenient system maintenance.

[0031] In this embodiment, a first temperature sensor 81, a second temperature sensor 82 and a humidity sensor 83 are arranged in the air inlet channel 4, the first temperature sensor 81 is located between the recovery device 6 and the electric heating tube 2, the second temperature sensor 82 and the humidity sensor 83 are both located on the side of the electric heating tube 2 away from the recovery device 6, the first temperature sensor 81 and the humidity sensor 83 are both fixedly connected to the air inlet channel 4, the insulation shell 1 is provided with a controller 8, and the first temperature sensor 81, the second temperature sensor 82, the humidity sensor 83, the electric heating tube 2, the air inlet fan 41, and the drive motor 33 are all electrically connected to the controller 8.

[0032] The first temperature sensor 81 is used to monitor the temperature in the air inlet channel 4, and is located between the recovery device 6 and the electric heating tube 2, and can accurately feedback the temperature of the preheated air. The second temperature sensor 82 is used to detect the temperature of the hot air after passing through the electric heating tube 2, so that the controller 8 can control the temperature of the electric heating tube 2 and achieve accurate control of the heating temperature. The humidity sensor 83 is used to monitor the humidity of the air in the air inlet channel 4, and is located on the side of the electric heating tube 2 away from the recovery device 6, so as to detect the humidity of the heated air. By real-time monitoring of the temperature and humidity of the air inlet channel 4, the controller 8 can automatically adjust the heating intensity of the electric heating tube 2 and the speed of the air inlet fan 41 according to the sensor data to ensure the stability of the air inlet temperature and humidity. This helps to optimize the drying conditions of the fabric, prevent over-drying or under-drying, and improve the drying efficiency and energy efficiency utilization. The controller 8 (PLC) is connected to the temperature sensor, the humidity sensor 83, the electric heating tube 2, the air inlet fan 41 and the drive motor 33, and is used to control the working state of the entire drying system. Controller 8 can automatically adjust the working parameters of each component through data, realize a fully automated drying process, reduce manual operation and errors, and further improve the working efficiency and drying quality of the equipment. Controller 8 (PLC) can use Siemens S7-1200 model PLC. Siemens S7-1200 model PLC has a compact design, integrated IO, and high-performance communication capabilities. For printing and dyeing drying equipment that requires temperature, humidity monitoring and motor control, the integrated control and communication capabilities of Siemens S7-1200 are sufficient to meet complex automation needs.

[0033] In this embodiment, the driving device includes two driving rollers 32 and a driving motor 33. The two driving rollers 32 are respectively located at the two channel openings of the spiral drying channel 3. The driving rollers 32 are rotatably connected to the insulation shell 1. The two driving motors 33 are fixedly connected to the insulation shell 1 or the spiral drying channel 3. The driving motor 33 is connected to the driving rollers 32.

[0034] The driving rollers 32 are installed at both ends of the spiral drying channel 3, and the fabric is driven to move in the spiral drying channel 3 by the driving motor 33. Through the rotation of the driving rollers 32, the fabric can move in the spiral drying channel 3 in an orderly manner, ensuring that the fabric can be dried by hot air in all directions. Its layout and driving control reduce manual intervention and improve production efficiency.

[0035] A printing and dyeing method of energy-saving and environment-friendly printing and dyeing equipment, comprising the following printing and dyeing steps: S1. Prepare the fabrics to be dried.

[0036] Make sure you choose the right type of fabric for tumble drying and understand its heat resistance and water absorption. Before tumble drying, you can wash, stain remover or pre-soak the fabric to remove dirt and impurities and improve subsequent drying results.

[0037] S2. Place one end of the fabric to be dried into the spiral drying channel 3 from the feed port 11, and sequentially contact the driving roller 32 near the feed port 11, the supporting roller 31, and the driving roller 32 near the discharge port 12 along the spiral drying channel 3 to ensure that the fabric is unfolded on the driving roller 32 and the supporting roller 31.

[0038] After the fabric is unfolded on the support roller 31, it is driven by the driving roller 32 to move slowly. The design of the support roller 31 with a large middle diameter and small diameters on both sides can prevent the fabric from overlapping during movement, thereby improving the drying effect and drying efficiency.

[0039] S3, start the electric heating tube 2 to make it reach a preset temperature.

[0040] The electric heating tube 2 heats the air near the heater to make the air temperature reach a preset value, ensuring that the hot air entering the spiral drying channel 3 can effectively perform the drying operation.

[0041] S4, start the air inlet fan 41, heat the air through the electric heating tube 2 and send it into the spiral drying channel 3 to dry the fabric. The hot air passing through the spiral drying channel 3 recovers energy from the air outlet duct 5 to the recovery device 6, and is finally discharged from the air outlet 51.

[0042] The hot air moves from the lower side to the upper side of the spiral drying channel 3, during which the temperature of the fabric is increased by heat conduction, promoting the evaporation of moisture in the fabric. The evaporated water vapor moves to the top of the spiral drying channel 3 with the hot air, enters the air outlet duct 5, contacts the heat exchange tube 61 and the fin 62 for cooling and condensation, and then drips into the drain pipe 7 for discharge.

[0043] S5, the dried fabric is discharged from the discharge port 12.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy-saving and environment-friendly printing and dyeing device, comprising a heat-insulating housing (1), characterized in that: A spiral drying channel (3) is provided in the heat-insulating shell (1). The spiral drying channel (3) is vertically arranged in the heat-insulating shell (1). A feed port (11) for fabric to enter is provided at the top channel opening of the spiral drying channel (3). A discharge port (12) is provided at the bottom channel opening of the spiral drying channel (3) away from the feed port (11). A supporting device for keeping the fabric always located in the middle of the spiral drying channel (3) is provided in the spiral drying channel (3). A hot air device for drying the fabric is provided at the bottom channel opening of the spiral drying channel (3) away from the feed port (11). An air outlet duct (5) is provided at the top channel opening of the spiral drying channel (3) near the feed port (11). The air outlet duct (5) extends to the outside of the heat-insulating shell (1). A recovery device (6) for recovering heat for reuse is provided in the air outlet duct (5). Drive devices for driving the fabric to move are provided at both ends of the spiral drying channel (3).

2. The energy-saving and environment-friendly printing and dyeing equipment according to claim 1, characterized in that: The support structure comprises a plurality of support rollers (31), wherein the plurality of support rollers (31) are arranged along a spiral roller channel, the support rollers (31) are located in the middle of the spiral drying channel (3), and the support rollers (31) are rotatably connected to the spiral drying channel (3).

3. The energy-saving and environment-friendly printing and dyeing equipment according to claim 2 is characterized in that: The surface of the support roller (31) is an arc-shaped surface, the diameter in the middle of the support roller (31) is larger than the diameters on both sides thereof, and the diameter of the support roller (31) gradually decreases from the middle to both sides thereof.

4. The energy-saving and environment-friendly printing and dyeing equipment according to claim 1, characterized in that: The hot air device comprises an air inlet channel (4), an electric heating pipe (2), and an air inlet fan (41); the air inlet channel (4) is connected to a channel opening at the bottom of the spiral drying channel (3); the electric heating pipe (2) is located in the air inlet channel (4); and an air inlet fan (41) is provided on a side of the electric heating pipe (2) away from a connection between the air inlet channel (4) and the spiral drying channel (3).

5. The energy-saving and environment-friendly printing and dyeing equipment according to claim 4, characterized in that: An annular air outlet channel (34) is provided at the connection between the air inlet channel (4) and the spiral drying channel (3); the annular air outlet channel (34) is connected to the air inlet channel (4) and the spiral drying channel (3); a flat-mouth air outlet (51) is provided at the connection between the annular air outlet channel (34) and the spiral drying channel (3); the flat-mouth air outlet (51) is inclined toward the top of the spiral drying channel (3).

6. The energy-saving and environment-friendly printing and dyeing equipment according to claim 1, characterized in that: The air outlet duct (5) extends toward the bottom of the protective shell and extends to the lower side of the air inlet channel (4); the heat-insulating shell (1) is provided with an air outlet (51), and the air outlet (51) is connected to the end of the air outlet duct (5); the recovery device (6) comprises a heat exchange tube (61) and a plurality of fins (62); the heat exchange tube (61) is filled with a cooling medium; a portion of the heat exchange tube (61) is located in the air inlet channel (4), and another portion of the heat exchange tube (61) is located in the air inlet channel (4). The heat exchange tubes (61) are located in the air inlet channel (4) and the air outlet channel (5), and form a heat exchange circuit. The fins (62) are evenly distributed in the air inlet channel (4) and the air outlet channel (5). The fins (62) are linearly arranged along the heat exchange tubes (61). The fins (62) are parallel to the air inlet channel (4) or the air outlet channel (5). The heat exchange tubes (61) pass through the fins (62) and are fixedly connected to the fins (62).

7. The energy-saving and environment-friendly printing and dyeing equipment according to claim 6 is characterized in that: The air outlet duct (5) is provided with a drain port (71), the drain port (71) is located below the heat exchange tube (61), the drain port (71) is inclined towards the drain port (71) on all sides, the drain port (71) is connected to a drain pipe (7), and the drain pipe (7) extends outside the heat insulation shell (1) and extends out of the heat insulation shell (1).

8. The energy-saving and environment-friendly printing and dyeing equipment according to claim 6 or 7, characterized in that: A first temperature sensor (81), a second temperature sensor (82) and a humidity sensor (83) are provided in the air inlet passage (4); the first temperature sensor (81) is located between the recovery device (6) and the electric heating tube (2); the second temperature sensor (82) and the humidity sensor (83) are both located on a side of the electric heating tube (2) away from the recovery device (6); the first temperature sensor (81) and the humidity sensor (83) are both fixedly connected to the air inlet passage (4); the heat-insulating shell (1) is provided with a controller (8); the first temperature sensor (81), the second temperature sensor (82), the humidity sensor (83), the electric heating tube (2), the air inlet fan (41) and the drive motor (33) are all electrically connected to the controller (8).

9. The energy-saving and environment-friendly printing and dyeing equipment according to claim 1, characterized in that: The driving device comprises two driving rollers (32) and a driving motor (33); the two driving rollers (32) are respectively located at two channel openings of the spiral drying channel (3); the driving rollers (32) are rotationally connected to the heat-insulating shell (1); the two driving motors (33) are fixedly connected to the heat-insulating shell (1) or the spiral drying channel (3); and the driving motor (33) is connected to the driving rollers (32).

10. A printing and dyeing method according to any one of claims 1 to 9, characterized in that: The printing and dyeing process includes the following steps: S1. Prepare fabrics to be dried; S2, placing one end of the fabric to be dried into the spiral drying channel (3) from the feed inlet (11), and abutting against the driving roller (32) near the feed inlet (11), the supporting roller (31), and the driving roller (32) near the discharge port (12) in sequence along the spiral drying channel (3), ensuring that the fabric is unfolded on the driving roller (32) and the supporting roller (31); S3, starting the electric heating tube (2) to make it reach a preset temperature; S4, starting the air inlet fan (41), heating the air through the electric heating tube (2) and then sending the air into the spiral drying channel (3) to dry the fabric; S5, the dried fabric is discharged from the discharge port (12).

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