Waste gas recycling device of dryer

Abstract

The invention discloses a waste gas recycling device of a dryer, and relates to the technical field of textile after-finishing equipment, and the waste gas recycling device is characterized in that a plurality of sealing plates are fixedly connected between a heat conduction chamber and a preheating chamber, and an upper heat conduction cavity and a lower heat conduction cavity are defined by the heat conduction chamber, the preheating chamber and the plurality of sealing plates; high-temperature waste gas entering the upper heat conduction cavity and the lower heat conduction cavity increases the temperature in the heat conduction chamber in a heat transfer mode, the heat conduction chamber is used for preheating fabric, the cooling assembly reduces the water temperature in the cooling box through air cooling, a plurality of water guide pipes are communicated between the condensation chamber and the water tank, and the water guide pipes are filled with water guide pieces. And high-temperature waste gas entering the condensation chamber is liquefied when being in contact with the condensation pipe. Heat in high-temperature waste gas is utilized to preheat cleaned fabric through the waste gas recycling device, energy consumption needed by the dryer for heating the fabric is reduced, collected condensate water is stored in the water tank and pumped into the washing machine through the second water pump to be used for fabric cleaning, and recycling of the waste gas is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of textile finishing equipment, more particularly, it relates to a waste gas recycling device of a drying machine. BACKGROUND

[0002] The drying machine is an industrial equipment which uses heat energy to evaporate and dry the water contained in the fabric, and it is a crucial link in the textile printing and dyeing finishing process, directly affecting the quality, hand feeling and production efficiency of the product.

[0003] In the textile printing and dyeing industry, after the fabric is dyed, it usually needs to be washed thoroughly to remove the floating color and residual chemical auxiliaries, however, the washed fabric contains a large amount of water, and a large amount of high-temperature water vapor will be generated in the process of entering the drying machine for drying treatment, which contains a large amount of heat energy and water, and direct purification and discharge not only increases the cost of waste gas purification treatment, but also causes waste of resources.

[0004] Therefore, a new scheme is needed to solve this problem. SUMMARY

[0005] In view of the deficiencies of the prior art, the purpose of the present application is to provide a waste gas recycling device of a drying machine.

[0006] The above technical purpose of the present application is realized by the following technical scheme: the waste gas recycling device of the drying machine comprises a washing machine, a preheating chamber and a drying machine which are arranged in sequence along the fabric conveying direction, and a waste gas recycling device is arranged between the washing machine, the preheating chamber and the drying machine, and the waste gas recycling device comprises a fan, a gas conveying pipe, a condensing chamber, a condensing device and a water tank; A heat conduction chamber is arranged in the preheating chamber, a plurality of sealing plates are fixedly connected between the heat conduction chamber and the preheating chamber, a conveying passage is formed between the two sealing plates arranged symmetrically upward and downward, and an upper heat conduction cavity and a lower heat conduction cavity are formed between the heat conduction chamber, the preheating chamber and the plurality of sealing plates, the gas conveying pipe comprises a first guide pipe, a second guide pipe, a third guide pipe, a fourth guide pipe and a fifth guide pipe, the second guide pipe and the third guide pipe are symmetrically arranged on the two sides of the preheating chamber, and the two ends of the second guide pipe and the third guide pipe are respectively connected with the upper heat conduction cavity and the lower heat conduction cavity, the high-temperature waste gas entering the upper heat conduction cavity and the lower heat conduction cavity increases the temperature in the heat conduction chamber by heat transfer, and the heat conduction chamber is used for preheating the fabric; The fourth guide pipe and the fifth guide pipe are respectively connected with the two sides of the condensing chamber, the condensing device comprises a condensing pipe, a cooling tank, a water pump and a heat dissipation assembly, the condensing pipe is arranged in a reciprocating bending shape in the condensing chamber, the two ends of the condensing pipe are respectively connected with the cooling tank and the condensing chamber through the circumferential wall of the condensing chamber, the water pump is connected at the part of the condensing pipe between the cooling tank and the condensing chamber, and the cooling assembly reduces the water temperature in the cooling tank by air cooling. A plurality of water guide pipes are communicated between the condensing chamber and the water tank, and the water guide pipes are filled with water guide members, high-temperature exhaust gas entering the condensing chamber is liquefied when contacting the condensing pipe, and condensed water formed in the condensing chamber is collected in the water tank through the plurality of water guide members, and when the condensed water in the water tank rises to a preset liquid level, it is pumped into the water washing machine to clean the fabric.

[0007] Preferably, the width of the sealing plate is the same as the spacing between the heat conduction chamber and the preheating chamber, the length of the sealing plate, the heat conduction chamber and the preheating chamber is the same, the peripheral wall of the sealing plate is welded and fixed with the outer side wall of the heat conduction chamber and the inner side wall of the preheating chamber, and the cross section of the upper heat conduction cavity and the lower heat conduction cavity is C-shaped.

[0008] Preferably, the heat conduction chamber and the preheating chamber are both provided with a through groove communicated with the conveying channel, a plurality of guide rollers are rotatably connected in the heat conduction chamber, the heat conduction chamber is made of aluminum alloy, and the preheating chamber and the gas conveying pipe are both made of stainless steel.

[0009] Preferably, one end of the guide pipe one is communicated with the air outlet of the fan, the other end of the guide pipe one is communicated with the middle part of the guide pipe two, the other end of the guide pipe four is communicated with the middle part of the guide pipe three, and the other end of the guide pipe five is communicated with the exhaust gas purification device.

[0010] Preferably, the cooling tank is provided with cooling water, the cooling water flows in the condensing pipe through the water pump one, the heat dissipation assembly comprises a bracket and a fan, the bracket is fixedly connected to one side of the water tank away from the preheating chamber, the water tank on one side of the bracket is provided with a plurality of heat dissipation fins, and the fan is rotatably connected to the bracket and oppositely arranged with the plurality of heat dissipation fins.

[0011] Preferably, the cross section of the condensing chamber is circular, the condensing chamber is located directly above the water tank, the two ends of the water guide pipe are respectively communicated with the bottom of the condensing chamber and the top of the water tank, the water guide member is provided in a three-layer composite structure, the bottom of the water guide member is provided with a support net, the pore size of the support net is 0.5-0.8mm, the middle part of the water guide member is filled with high molecular water-absorbing resin particles, the particle size of the high molecular water-absorbing resin particles is 1-3mm, the filling density is 0.6-0.8g / cm³, and the filling thickness is 10-15cm, the top of the water guide member is provided with a sponge, the thickness of the sponge is 1-2cm, and the peripheral walls of the sponge and the support net are fixedly connected with the inner wall of the water guide pipe.

[0012] Preferred: A control system for the waste gas recovery device of the dryer, the control system including a control panel, a data acquisition module and a human-machine interaction module, the data acquisition module including a temperature sensor installed in the preheating chamber, a water level sensor installed in the water tank, and a humidity sensor installed in the condensation chamber, the temperature sensor, the water level sensor and the humidity sensor are all electrically connected to a central controller, the heating device of the dryer is electrically connected to the central controller, and the central controller adjusts the heating temperature in the dryer according to the temperature detected by the temperature sensor.

[0013] Preferably, a second water pump and a liquid delivery pipe are connected between the water tank and the washing machine. The first water pump, the second water pump, and the fan are all electrically connected to the central controller. The central controller adjusts the speed of the fan and the first water pump according to the humidity detected by the humidity sensor. When the liquid level in the water tank reaches the preset value of the water level sensor, the central controller controls the second water pump to pump the condensate in the water tank into the washing machine.

[0014] Preferably, the human-machine interaction module includes a control panel, an alarm unit, and a Bluetooth module. The control panel is electrically connected to the central controller. The control panel displays various data collected by the data acquisition module and inputs control commands to the central controller via touch screen or buttons. The temperature sensor, humidity sensor, and water level sensor can all have their detection preset values ​​adjusted via the control panel.

[0015] Preferably, both the alarm unit and the Bluetooth module are electrically connected to the central controller. When the data collected by the data acquisition module exceeds the preset range, the central controller activates the alarm unit to issue an audible and visual alarm signal. The Bluetooth module is connected to a mobile APP via Bluetooth. The mobile APP can display various data and send control commands to the central controller along with the control panel. The alarm signal issued by the alarm unit is synchronized to the mobile APP.

[0016] In summary, the present invention has the following beneficial effects: 1. By using the waste gas recycling device and preheating chamber to preheat the cleaned fabric with the heat in the high-temperature waste gas, the energy consumption required for the dryer to heat the fabric is reduced, and the waste heat is recycled. At the same time, preheating the fabric can avoid fabric damage that may be caused by excessive temperature difference, thus improving product quality.

[0017] 2. The condensation device uses condenser tubes arranged in a reciprocating bend, which increases the contact area between the condenser tubes and the high-temperature exhaust gas. Water pump one drives the cooling water in the cooling tank to circulate in the condenser tubes. Together with the heat dissipation components, the cooling water is kept at a low temperature, ensuring that the high-temperature exhaust gas can be fully cooled and liquefied. The collected condensate is stored in the water tank and pumped to the washing machine by water pump two for fabric cleaning, realizing the recovery and reuse of moisture in the exhaust gas and reducing the water consumption of the washing machine.

[0018] 3. The control system monitors the operating conditions of the preheating chamber and condensing chamber in real time through temperature and humidity sensors. The central controller can intelligently adjust the heating power of the dryer based on the temperature feedback from the preheating chamber to match the required drying temperature. It can also dynamically adjust the speed of the fan and water pump based on the humidity of the condensing chamber to match the required condensing efficiency and avoid energy waste. When abnormalities occur in the processing steps, such as temperature, humidity, or water level, and exceed the preset range, the alarm unit will immediately issue an audible and visual alarm and synchronize it to the mobile APP via Bluetooth module to remind the operator to intervene in time, ensuring production safety and continuous stable operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a cross-sectional view of the waste gas recycling device in this invention; Figure 4 This is a cross-sectional view of the preheating chamber in this invention; Figure 5 This is a schematic diagram of the water guiding component in this invention; Figure 6 This is a control system diagram of the waste gas recycling device in this invention.

[0020] In the diagram: 1. Washing machine; 2. Preheating chamber; 3. Dryer; 4. Waste gas recovery device; 5. Fan; 6. Gas delivery pipe; 601. Pipe 1; 602. Pipe 2; 603. Pipe 3; 604. Pipe 4; 605. Pipe 5; 7. Condensation chamber; 801. Condensing pipe; 802. Cooling box; 803. Water pump 1; 804. Support; 805. Fan; 9. Water tank; 10. Heat conduction chamber; 11. Sealing plate; 12. Conveying channel; 13. Upper heat conduction cavity; 14. Lower heat conduction cavity; 15. Water guide pipe; 16. Water guide component; 1601. Support net; 1602. High molecular weight water-absorbing resin particles; 1603. Sponge; 17. Through groove; 18. Guide roller; 19. Control panel; 20. Water pump 2; 21. Liquid delivery pipe. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0022] Example: Waste gas recovery device for dryer, such as Figures 1-4As shown, the system includes a washing machine 1, a preheating chamber 2, and a dryer 3 arranged sequentially along the fabric conveying direction. A waste gas recycling device 4 is provided between the washing machine 1, preheating chamber 2, and dryer 3. The waste gas recycling device 4 includes a fan 5, a gas delivery pipe 6, a condensing chamber 7, a condensing device, and a water tank 9. A heat-conducting chamber 10 is located in the middle of the preheating chamber 2. Four sealing plates 11 are fixedly connected between the heat-conducting chamber 10 and the preheating chamber 2. A conveying channel 12 is formed between two symmetrically arranged sealing plates 11. Both the heat-conducting chamber 10 and the preheating chamber 2 have through slots communicating with the conveying channel 12. 17. Fabric output from washing machine 1 enters heat-conducting chamber 10 through several channels 17 and conveying channels 12, and exits into dryer 3 from the other side through several channels 17 and conveying channels 12. An upper heat-conducting cavity 13 and a lower heat-conducting cavity 14 are formed between heat-conducting chamber 10, preheating chamber 2, and several sealing plates 11. Air supply pipe 6 includes conduit 1 601, conduit 2 602, conduit 3 603, conduit 4 604, and conduit 5 605. Conduit 2 602 and conduit 3 603 are symmetrically arranged on both sides of preheating chamber 2. The two ends of conduit 2 602 and conduit 3 603 are respectively connected to the upper heat-conducting cavity 13 and... The lower heat-conducting chambers 14 are interconnected. One end of conduit 1 601 is connected to the air outlet of the fan 5, and the end of conduit 1 601 away from the fan 5 is connected to the middle of conduit 2 602. The air inlet of the fan 5 is connected to the top of the dryer 3. The fan 5 draws in the high-temperature water vapor generated when the dryer 3 dries the fabric and transports it through conduit 1 601 and conduit 2 602 into the upper heat-conducting chambers 13 and 14. The cross-sections of the upper heat-conducting chamber 13 and the lower heat-conducting chamber 14 are both C-shaped, so that the high-temperature exhaust gas evenly surrounds the heat-conducting chamber 10. The heat-conducting chamber 10 is made of aluminum alloy, which has the following properties: The excellent thermal conductivity allows the heat in the high-temperature exhaust gas to be transferred to raise the temperature inside the heat conduction chamber 10, enabling the fabric conveyed into the heat conduction chamber 10 to be preheated before entering the dryer 3. This reduces the energy consumption required for the dryer 3 to heat the fabric and achieves the effect of waste heat recovery. Several staggered guide rollers 18 are rotatably connected inside the heat conduction chamber 10, which extend the conveying time of the fabric in the heat conduction chamber 10 and ensure the preheating effect of the fabric. Preheating the fabric can avoid fabric damage that may be caused by excessive temperature difference and improve product quality.

[0023] like Figures 1-4As shown, the width of the sealing plate 11 is the same as the distance between the heat conduction chamber 10 and the preheating chamber 2. The lengths of the sealing plate 11, the heat conduction chamber 10, and the preheating chamber 2 are the same. The peripheral wall of the sealing plate 11 is welded and fixed to the outer wall of the heat conduction chamber 10 and the inner wall of the preheating chamber 2, thereby preventing the fabric from contacting the exhaust gas during transportation. The fourth conduit 604 and the fifth conduit 605 are respectively connected to the two sides of the condensing chamber 7. The end of the fourth conduit 604 away from the condensing chamber 7 is connected to the middle of the third conduit 603. The exhaust gas output from the upper heat conduction chamber 13 and the lower heat conduction chamber 14 enters the condensing chamber 7 through the third conduit 603 and the fourth conduit 604. The condensing device includes a condensing pipe 801, a cooling box 802, a water pump 803, and a heat dissipation component. The condensing pipe 801 is arranged in a reciprocating bending shape in the condensing chamber 7. Both ends of the condensing pipe 801 pass through the peripheral wall of the condensing chamber 7 and are connected to the cooling box 802. The water pump 803 is connected to the cooling box 802 located at the condensing pipe 801. Between the cooling tank 802 and the condensing chamber 7, the cooling tank 802 contains cooling water, which circulates through the condenser tube 801 via a water pump 803. This causes the high-temperature exhaust gas entering the condensing chamber 7 to liquefy upon contact with the surface of the condenser tube 801. The heat dissipation assembly includes a bracket 804 and a fan 805. The bracket 804 is fixedly connected to the side of the water tank 9 away from the preheating chamber 2. The water tank 9 has several heat dissipation fins on the side of the bracket 804. The fan 805 is rotatably connected to the bracket 804 and is positioned opposite to the heat dissipation fins. Through the heat dissipation assembly and the heat dissipation fins, the water temperature inside the cooling tank 802 can be continuously reduced. The reciprocatingly bent condenser tube 801 increases the contact area with the high-temperature exhaust gas. Together with the heat dissipation assembly, it maintains the low temperature of the cooling water, ensuring that the high-temperature exhaust gas can be fully liquefied upon contact with the cooling water. The condensing chamber 7 has a circular cross-section, so that the continuously formed condensate will collect at the bottom of the condensing chamber 7.

[0024] like Figures 1-5As shown, the condenser chamber 7 is located directly above the water tank 9. Several water guide pipes 15 connect the condenser chamber 7 and the water tank 9. The two ends of the water guide pipes 15 are connected to the bottom of the condenser chamber 7 and the top of the water tank 9, respectively. The water guide pipes 15 are filled with water guide components 16. The water guide components 16 are cylindrical with a three-layer composite structure. The bottom of the water guide components 16 is a support mesh 1601 with a pore size of 0.5-0.8mm. The middle part of the water guide components 16 is filled with superabsorbent polymer resin particles 1602 with a particle size of 1-3mm and a filling density of 0. With a density of 6-0.8 g / cm³ and a filling thickness of 10-15 cm, the superabsorbent polymer (SAP) particles 1602 are prevented from falling out of the support net 1601. The top of the water guide 16 is set with a sponge 1603, which is 1-2 cm thick. The sponge 1603 blocks the SAP particles 1602 from scattering with the exhaust gas. The peripheral wall of the support net 1601 is welded and fixed to the inner wall of the water guide pipe 15, and the peripheral wall of the sponge 1603 is glued and fixed to the inner wall of the water guide pipe 15. The sponge 1603 and the SAP particles 1602 have good hygroscopicity and absorbency. When wet, the sponge 1603 expands, thus preventing exhaust gas from entering the water tank 9. After reaching moisture saturation, the sponge 1603 and superabsorbent polymer granules 1602 will allow water to flow into the water tank 9 due to gravity. Simultaneously, the sponge 1603 and superabsorbent polymer granules 1602 have a certain filtering effect. A sealed door is required on the side wall of the condenser chamber 7 for replacement of the water guide component 16 when it is worn. A water pump 20 and a liquid delivery pipe 21 connect the water tank 9 and the washing machine 1. When the condensate in the water tank 9 rises to the preset liquid level, it is pumped into the washing machine 1 by the water pump 20. The washing process cleans fabrics and recovers and reuses moisture from the exhaust gas, reducing the water consumption of the washing machine 1. The preheating chamber 2 and the air supply pipe 6 are both made of stainless steel. Stainless steel has poor thermal conductivity, which reduces the temperature loss of high-temperature exhaust gas during transportation. When the exhaust gas enters the condensing chamber 7, its temperature is reduced by heat transfer when it comes into contact with the condenser pipe 801. The end of the conduit 605 away from the condensing chamber 7 is connected to an exhaust gas purification device. Because the moisture in the high-temperature exhaust gas is separated in advance and the temperature is reduced in advance, the cost of subsequent exhaust gas purification treatment is reduced. This achieves resource recovery and reuse while reducing energy consumption during equipment processing.

[0025] like Figures 1-6As shown, a control system for a waste gas recycling device 4 for a dryer 3 is disclosed. The control system includes a control panel 19, a data acquisition module, and a human-machine interface module. The data acquisition module includes a temperature sensor installed in the preheating chamber 2, a water level sensor installed in the water tank 9, and a humidity sensor installed in the condensation chamber 7. The temperature sensor, water level sensor, and humidity sensor are all electrically connected to a central controller. The heating device of the dryer 3 is electrically connected to the central controller. The heating device is specifically an electric heating element. The central controller adjusts the heating temperature inside the dryer 3 according to the temperature detected by the temperature sensor. Specifically, when the preheating temperature increases, the heating temperature inside the dryer 3 decreases; when the preheating temperature decreases, the heating temperature inside the dryer 3 increases. Through dynamic temperature adjustment, the dryer 3 does not need to continuously maintain the highest heating state, thus reducing the energy consumption of the dryer 3. A water pump 803 is also included. Both pump 20 and fan 805 are electrically connected to the central controller. The central controller adjusts the speed of fan 805 and water pump 803 according to the humidity detected by the humidity sensor. Specifically, when the humidity decreases, the speed of water pump 803 and fan 805 is increased, and when the humidity increases, the speed of water pump 803 and fan 805 is decreased. Through dynamic humidity adjustment, water pump 803 and fan 805 do not need to maintain maximum power continuously, thus reducing energy consumption. The washing machine 1 is equipped with two conveying routes. One is the conventional water supply line set by the washing machine 1 itself, and the other is the reuse water supply line. Specifically, when the liquid level in water tank 9 reaches the preset value of the water level sensor, the conventional water supply line is shut off, and water pump 20 is controlled by the central controller to pump the condensate in water tank 9 to the washing machine 1 for washing operation, thereby reducing the energy consumption of the washing machine 1.

[0026] like Figure 1 and Figure 6As shown, the human-machine interface module includes a control panel 19, an alarm unit, and a Bluetooth module. The control panel 19 is electrically connected to the central controller. The control panel 19 displays various data collected by the data acquisition module and inputs control commands to the central controller via touchscreen or buttons. Temperature, humidity, and water level sensors all have their detection preset values ​​adjusted via the control panel 19. Both the alarm unit and the Bluetooth module are electrically connected to the central controller. When the data collected by the data acquisition module exceeds the preset range, the central controller activates the alarm unit to issue an audible and visual alarm signal, promptly alerting operators to equipment abnormalities. This facilitates quick troubleshooting and handling of faults, preventing further damage or production interruptions, and improving the safety and reliability of equipment operation. The Bluetooth module... Connected to a mobile app, the mobile app and control panel 19 can display various data and send control commands to the central controller. Alarm signals from the alarm unit are synchronized to the mobile app, allowing operators to remotely monitor the equipment's operating status in real time without being on-site, simply by using a mobile device such as a smartphone. This facilitates management personnel's ability to keep track of production conditions at any time. Simultaneously, operators can also send control commands to the central controller via the mobile app to remotely adjust equipment parameters. This is particularly suitable for scenarios requiring the simultaneous management of multiple devices or where personnel cannot be on-site for extended periods, enhancing the flexibility and convenience of equipment management. The synchronized alarm signals from the alarm unit to the mobile app ensure that operators can promptly detect equipment abnormalities even when not on-site, further improving the timeliness of handling equipment malfunctions.

[0027] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A waste gas recycling device for a dryer, comprising a washing machine (1), a preheating chamber (2), and a dryer (3) arranged sequentially along the fabric conveying direction, characterized in that: A waste gas recycling device (4) is provided between the washing machine (1), the preheating chamber (2) and the dryer (3). The waste gas recycling device (4) includes a fan (5), a gas transmission pipe (6), a condensing chamber (7), a condensing device and a water tank (9). The preheating chamber (2) is provided with a heat conduction chamber (10). Several sealing plates (11) are fixedly connected between the heat conduction chamber (10) and the preheating chamber (2). A conveying channel (12) is formed between two symmetrically arranged sealing plates (11). An upper heat conduction cavity (13) and a lower heat conduction cavity (14) are formed between the heat conduction chamber (10), the preheating chamber (2) and the several sealing plates (11). The gas delivery pipe (6) includes a first conduit (601), a second conduit (602), and a third conduit (603). 3) Conduit 4 (604) and conduit 5 (605), conduit 2 (602) and conduit 3 (603) are symmetrically arranged on both sides of the preheating chamber (2). The two ends of conduit 2 (602) and conduit 3 (603) are respectively connected to the upper heat conduction chamber (13) and the lower heat conduction chamber (14). The high temperature waste gas entering the upper heat conduction chamber (13) and the lower heat conduction chamber (14) raises the temperature in the heat conduction chamber (10) by heat transfer. The heat conduction chamber (10) is used to preheat the fabric. The fourth conduit (604) and the fifth conduit (605) are respectively connected to both sides of the condensing chamber (7). The condensing device includes a condensing pipe (801), a cooling box (802), a water pump (803), and a heat dissipation component. The condensing pipe (801) is arranged in a reciprocating bending shape in the condensing chamber (7). Both ends of the condensing pipe (801) pass through the peripheral wall of the condensing chamber (7) and are connected to the cooling box (802). The water pump (803) is connected to the part of the condensing pipe (801) located between the cooling box (802) and the condensing chamber (7). The cooling component reduces the water temperature in the cooling box (802) by air cooling. A plurality of water guide pipes (15) are connected between the condensing chamber (7) and the water tank (9). The water guide pipes (15) are filled with water guide components (16). When the high-temperature exhaust gas entering the condensing chamber (7) comes into contact with the condensing pipe (801), it is cooled and liquefied. The condensate formed in the condensing chamber (7) is collected in the water tank (9) through the plurality of water guide components (16). When the condensate in the water tank (9) rises to the preset liquid level, it is pumped into the washing machine (1) to clean the fabric.

2. The waste gas recycling device for the dryer according to claim 1, characterized in that: The width of the sealing plate (11) is the same as the distance between the heat conduction chamber (10) and the preheating chamber (2). The lengths of the sealing plate (11), the heat conduction chamber (10), and the preheating chamber (2) are the same. The peripheral wall of the sealing plate (11) is welded and fixed to the outer wall of the heat conduction chamber (10) and the inner wall of the preheating chamber (2). The cross-sections of the upper heat conduction cavity (13) and the lower heat conduction cavity (14) are both C-shaped.

3. The waste gas recycling device for the dryer according to claim 2, characterized in that: Both the heat conduction chamber (10) and the preheating chamber (2) are provided with through grooves (17) that communicate with the conveying channel (12). Several guide rollers (18) are rotatably connected inside the heat conduction chamber (10). The heat conduction chamber (10) is made of aluminum alloy. The preheating chamber (2) and the gas conveying pipe (6) are both made of stainless steel.

4. The waste gas recovery device for the dryer according to claim 3, characterized in that: One end of the first conduit (601) is connected to the air outlet of the fan (5). The end of the first conduit (601) away from the fan (5) is connected to the middle of the second conduit (602). The end of the fourth conduit (604) away from the condenser (7) is connected to the middle of the third conduit (603). The end of the fifth conduit (605) away from the condenser (7) is connected to a waste gas purification device.

5. The waste gas recycling device for the dryer according to claim 1, characterized in that: The cooling tank (802) is equipped with cooling water, which is circulated in the condenser tube (801) by a water pump (803). The heat dissipation assembly includes a bracket (804) and a fan (805). The bracket (804) is fixedly connected to the side of the water tank (9) away from the preheating chamber (2). The water tank (9) is provided with several heat dissipation fins on the side of the bracket (804). The fan (805) is rotatably connected to the bracket (804) and is arranged opposite to the several heat dissipation fins.

6. The waste gas recycling device for the dryer according to claim 5, characterized in that: The condensing chamber (7) has a circular cross-section and is located directly above the water tank (9). The two ends of the water guide pipe (15) are connected to the bottom of the condensing chamber (7) and the top of the water tank (9), respectively. The water guide component (16) is configured as a three-layer composite structure. The bottom of the water guide component (16) is configured as a support mesh (1601). The aperture of the support mesh (1601) is 0.5-0.8mm. The middle part of the water guide component (16) is made of polymer absorbent material. The water-based resin particles (1602) are filled with a particle size of 1-3 mm, a filling density of 0.6-0.8 g / cm³, and a filling thickness of 10-15 cm. The top of the water guide (16) is set as a sponge (1603), the thickness of the sponge (1603) is 1-2 cm, and the periphery of the sponge (1603) and the support net (1601) are fixedly connected to the inner wall of the water guide pipe (15).

7. A control system for a waste gas recovery device for the dryer according to any one of claims 1-6, characterized in that: The control system includes a control panel (19), a data acquisition module and a human-machine interaction module. The data acquisition module includes a temperature sensor installed in the preheating chamber (2), a water level sensor installed in the water tank (9), and a humidity sensor installed in the condensation chamber (7). The temperature sensor, water level sensor, and humidity sensor are all electrically connected to the central controller. The heating device of the dryer (3) is electrically connected to the central controller. The central controller adjusts the heating temperature in the dryer (3) according to the temperature detected by the temperature sensor.

8. The control system of the waste gas recovery device for the dryer according to claim 7, characterized in that: A second water pump (20) and a delivery pipe (21) are connected between the water tank (9) and the washing machine (1). The first water pump (803), the second water pump (20), and the fan (805) are all electrically connected to the central controller. The central controller adjusts the speed of the fan (805) and the first water pump (803) according to the humidity detected by the humidity sensor. When the liquid level in the water tank (9) reaches the preset value of the water level sensor, the central controller controls the second water pump (20) to pump the condensate in the water tank (9) into the washing machine (1).

9. The control system of the waste gas recovery device for the dryer according to claim 8, characterized in that: The human-machine interaction module includes a control panel (19), an alarm unit and a Bluetooth module. The control panel (19) is electrically connected to the central controller. The control panel (19) displays various data collected by the data acquisition module and inputs control commands to the central controller via touch screen or buttons. The temperature sensor, humidity sensor and water level sensor can all adjust their detection preset values ​​through the control panel (19).

10. The control system of the waste gas recovery device for the dryer according to claim 9, characterized in that: Both the alarm unit and the Bluetooth module are electrically connected to the central controller. When the data collected by the data acquisition module exceeds the preset range, the central controller activates the alarm unit to issue an audible and visual alarm signal. The Bluetooth module is connected to a mobile APP via Bluetooth. The mobile APP can display various data and send control commands to the central controller along with the control panel (19). The alarm signal issued by the alarm unit is synchronized to the mobile APP.

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