Self-cleaning intelligent tentering setting oven and tentering setting all-in-one machine thereof

Abstract

The application discloses a self-cleaning intelligent tentering and setting oven and a tentering and setting integrated machine thereof, wherein a heat recovery and air exchange chamber and a hot water and air exchange chamber are integrated in the oven, heat exchange of high-temperature waste gas and recycled clean gas is carried out through a heat recovery and exchange pipe group and a water and air heat exchange pipe group which are communicated with a static pressure air chamber, then the high-temperature waste gas is purified and recycled through a low-temperature plasma purification device and a three-way air uniformizing pipe, and a smoke and fire detector and a spraying fire extinguishing device are installed. The oven system provided by the application has the advantages of simple structure, high energy-saving efficiency, high safety and free combination; and the tentering and setting integrated machine system adopting the oven system can be flexibly arranged according to process requirements to adapt to processing requirements of different cloth types.

Description

Technical Field

[0001] This invention relates to an oven used in the stretching and setting process of the textile printing and dyeing industry, and in particular to a self-cleaning intelligent oven.

[0002] The present invention also relates to a stenter and setting machine that utilizes the self-cleaning intelligent oven. Background Technology

[0003] With the development of the textile industry and the increasing environmental protection requirements of society, higher demands have been placed on the stenter and setting machine, a major source of pollution in the dyeing and printing industry.

[0004] The original tenter frame machine consisted of a fabric feeding area (comprised of a fabric feeding assembly, a rolling mill, and a control console), multiple tenter frame drying ovens, and a fabric output support assembly, all controlled by the control console. The tenter frame drying oven system was the core of the entire system and a major source of energy consumption and pollution. Current environmental protection and energy-saving facilities treat the heat and waste gas generated by the multiple tenter frame drying ovens through an external, shared heat recovery and purification device. However, traditional external heat recovery and purification devices are bulky and require design and construction tailored to the overall performance of the tenter frame machine. Therefore, the number of tenter frame drying ovens and their associated heat recovery and purification devices are fixed for each tenter frame machine system, resulting in fixed overall performance and optimal fabric types that cannot be flexibly upgraded or adjusted to meet the company's needs. Consequently, energy waste or failure to meet production requirements is inevitable during production.

[0005] For example, the 3-box tenter frame machine commonly used by small and medium-sized printing and dyeing enterprises is best suited for medium-thickness fabrics. Using it for thin fabrics results in overcapacity and energy waste. On the other hand, it has insufficient capacity for thicker fabrics such as denim, which cannot handle such work and thus restricts the operation of the enterprise. If enterprises all use large 6-box tenter frame machines, not only are their construction and operating costs high, but they also have overcapacity and waste energy when processing medium and thin fabrics.

[0006] With the development of the textile industry and the increasing demand for small-batch rapid customization services, printing and dyeing companies often need more flexible production plans. For example, they require a tenter frame system that can produce a batch of thick fabric after processing a batch of thin fabric. However, the traditional tenter frame systems with fixed designs have fixed specifications and quantities, which cannot meet the needs of such small-batch rapid customization services.

[0007] In addition, the working environment in the stenter workshop is hot and dry, and a large amount of fabric is piled up, posing a fire safety hazard, which is a safety production issue that cannot be ignored. Summary of the Invention

[0008] The technical problem to be solved by this invention is to provide a novel oven design that addresses the issues of existing stenter and setting machines with fixed oven structures, such as the inability to adjust overall performance, a narrow range of optimal fabric types to be processed, resulting in energy waste and insufficient processing capacity. This novel design aims to meet the demands of the modern textile printing and dyeing industry for small-batch, rapid service and also solve the fire hazard problem in the working environment.

[0009] To solve the above-mentioned technical problems, the present invention provides a self-cleaning intelligent tenter frame drying oven, comprising a circulating air chamber at the bottom of the oven and a static pressure hot air chamber above the circulating air chamber. The circulating air chamber contains a heater and a circulating fan, and a circulating air chamber inlet pipe draws in fresh air. The static pressure hot air chamber contains a hot air nozzle device, which has two layers, with a fabric conveying track in the middle, and a nozzle on the side of the hot air nozzle device facing the fabric.

[0010] The technical solution of the present invention further includes a heat recovery and ventilation chamber and a hot water and air exchange chamber inside the oven, wherein the heat recovery and ventilation chamber is located above the static pressure hot air chamber, and the hot water and air exchange chamber is located above the heat recovery and ventilation chamber.

[0011] The heat recovery ventilation chamber is an empty cavity with a horizontally arranged heat recovery exchange pipe assembly inside, which runs through the heat recovery ventilation chamber.

[0012] The hot water gas exchange chamber is an empty cavity with a horizontal water-gas heat exchange pipe assembly inside that runs through the hot water gas exchange chamber, and the cavity is filled with water.

[0013] The front end of the heat recovery exchange tube assembly is connected to the static pressure hot air chamber through the exhaust gas filter chamber; the rear end is connected to the front end of the water-gas heat exchange tube assembly, and an interception net is installed inside the exhaust gas filter chamber.

[0014] The rear end of the water-air heat exchange tube assembly is connected to the inlet of the low-temperature plasma purification device. The outlet of the low-temperature plasma purification device is connected to the hot air return pipe through a balanced exhaust fan. There is a three-way air distribution pipe in the middle of the hot air return pipe, and the rear end is connected to the inner cavity of the heat recovery ventilation chamber. The other end of the inner cavity of the heat recovery ventilation chamber is connected to the air inlet pipe of the circulating air chamber.

[0015] When the aforementioned self-purifying intelligent tenter frame drying oven is operating, the hot exhaust gas generated in the static pressure hot air chamber is intercepted by the filter screen in the exhaust gas filter chamber, effectively separating residual materials such as lint particles from the exhaust gas and ensuring that lint and particulate matter in the exhaust gas do not enter subsequent processing procedures. The filtered hot exhaust gas enters the heat recovery exchange tube assembly in the heat recovery ventilation chamber, where it undergoes gas-to-gas heat exchange with the gas inside the chamber. After its temperature is reduced, it enters the water-to-gas heat exchange tube assembly in the upper hot water-to-gas exchange chamber, where it completes water-to-gas heat exchange with the water source inside the chamber. Finally, low-temperature exhaust gas is obtained and sent to the low-temperature plasma purification device for the removal and purification of harmful pollutants such as oil fumes, VOCs, and organic matter, resulting in purified clean gas that fully meets emission or reuse standards.

[0016] To maximize heat recovery and reduce the energy consumption of the circulating fan in the oven, the present invention designs a system where the clean gas emitted by the low-temperature plasma purification device is transported to the cavity of the heat recovery ventilation chamber through a hot air return pipe. The gas then undergoes heat exchange with the high-temperature waste gas through the heat recovery exchange pipe assembly, and the heated gas returns to the circulating ventilation chamber through the inlet pipe, thus completing the heat recovery, purification, and reuse of the heated waste gas.

[0017] By adopting the above design scheme, the self-cleaning intelligent tenter frame drying oven of the present invention simplifies and reduces the traditionally designed shared fixed external heat recovery and purification device to the inside of the drying oven. As a result, the number of drying ovens in the tenter frame integrated machine is no longer constrained by the traditional fixed design, but can be arbitrarily adjusted according to the actual production task, thereby achieving the purpose of flexible deployment.

[0018] Meanwhile, the built-in heat recovery and purification device fully realizes the reuse of hot exhaust gas. Theoretically, its heat loss only exists in the heat dissipation of the equipment shell and the leakage of some gas at the system seams, and the overall heat recovery efficiency is as high as 80% or more.

[0019] The optimized heat recovery exchange tube has multiple heat dissipation fins on its outer wall at the same level. These fins are arranged radially and evenly around the axis of the heat recovery exchange tube to increase the heat exchange contact area between the heated waste gas and the recovered clean gas, thereby improving the heat exchange rate.

[0020] The optimized hot air return pipe is wrapped with insulation material to reduce heat dissipation from the equipment casing.

[0021] The optimized heat recovery exchange tube assembly in the heat recovery ventilation chamber and the water-gas heat exchange tube assembly in the hot water-gas exchange chamber are aligned with the longer side of the oven body, thus achieving a longer gas-to-gas heat exchange and water-gas heat exchange stroke, further improving heat exchange efficiency.

[0022] The optimized design includes smoke detectors installed at high points on both sides of the oven, and a sprinkler fire suppression system installed at the center of the top of the oven. This system comprises a water pump and sprinkler heads, drawing water from the inlet of the hot water exchange chamber. When the smoke detectors detect a fire, the water pump drives water to spray from the sprinkler heads, achieving the fire suppression objective.

[0023] After adopting the above-mentioned invention technology, the number of self-cleaning intelligent tenter frame drying ovens in the tenter frame integrated machine can be freely combined and adjusted.

[0024] The optimized stenter machine has movable pulleys at the bottom of each component, allowing for free movement and easy assembly.

[0025] By adopting the above technical solutions, the present invention provides a self-cleaning intelligent tenter frame drying oven, which is not only simple in structure and highly energy-efficient, but also can be freely combined. This allows the number of drying ovens in the tenter frame integrated machine to no longer be constrained by the traditional fixed design, but can be arbitrarily adjusted according to the actual production tasks, thereby achieving the purpose of flexible deployment to adapt to the processing needs of different types of fabrics. Attached Figure Description

[0026] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings:

[0027] Figure 1 A schematic diagram of a traditional drying oven and heat recovery and purification device;

[0028] Figure 2 This is a simplified structural diagram of a traditional tenter frame integrated system;

[0029] Figure 3 This is a structural diagram of one embodiment of the present invention;

[0030] Figure 4 yes Figure 3 Schematic diagram of internal gas circulation and temperature in the embodiment;

[0031] Figure 5 yes Figure 3 Top view of the embodiment;

[0032] Figure 6 This is a schematic diagram of the heat recovery exchange tubes used;

[0033] Figure 7 This is a schematic diagram illustrating the free combination and adjustment using the present invention;

[0034] In the diagram: 1. Drying oven; 2. External heat recovery and purification device; 3. Fabric feeding assembly device; 4. Roller; 5. Control console; 6. Fabric output support assembly device; 7. Movable pulley block;

[0035] 11. Circulating air chamber; 12. Static pressure hot air chamber; 13. Heat recovery ventilation chamber; 14. Hot water air exchange chamber;

[0036] 101. Heater; 102. Circulating fan; 103. Circulating air chamber inlet pipe; 104. Arrangement track; 105. Hot air nozzle device; 106. Exhaust gas filter chamber; 107. Interception net; 108. Heat recovery exchange pipe assembly; 109. Smoke detector; 110. Sprinkler fire suppression system; 111. Water-air heat exchange pipe assembly; 112. Low-temperature plasma purification device; 113. Balanced exhaust fan; 114. T-junction air distribution duct; 115. Hot air reuse pipe. Detailed Implementation

[0037] like Figure 1 The conventional oven 1 shown is divided into two layers: a lower circulating air chamber 11 and an upper static pressure hot air chamber 12. The circulating air chamber 11 contains a heater 101 and a circulating fan 102, and a circulating air chamber inlet pipe 103 to draw in fresh air. The static pressure hot air chamber 12 contains a hot air nozzle device 105, which is divided into two layers in a horizontal U-shape. The center of the U-shape is a fabric conveyor track 104, and the hot air nozzle device has nozzles on the side facing the fabric. To recover heat energy, the conventional oven 1 is also equipped with an external heat recovery and purification device 2 to recover heat energy from the high-temperature exhaust gas, while the heated fresh air is drawn into the circulating air chamber 11 through the circulating air chamber inlet pipe 103. The gas flow path is shown by the dashed arrow.

[0038] like Figure 2 As shown, a traditional tenter frame machine consists of a fabric feeding area (composed of a fabric feeding assembly 3, a rolling mill 4, and a control console 5), multiple tenter frame drying ovens 1, and a fabric output support assembly 6. The machine's operating status is controlled by the control console 5. The exhaust gas treatment and heat recovery of the multiple drying oven systems are handled by a shared external heat recovery and purification device 2. Clearly, for each tenter frame machine, all operating parameters and optimal operating ranges are fixed. If a company needs to adjust the number of drying ovens after installing a tenter frame machine, it would require significant modifications to the entire system, which is practically impossible.

[0039] like Figure 3 As shown, the technical solution of the present invention further includes a heat recovery ventilation chamber 13 and a hot water air exchange chamber 14 inside the oven 1, wherein the heat recovery ventilation chamber 13 is located above the static pressure hot air chamber 12, and the hot water air exchange chamber 14 is located above the heat recovery ventilation chamber 13.

[0040] The heat recovery ventilation chamber 13 is an empty cavity, with a heat recovery exchange pipe group 108 arranged horizontally inside and running through the heat recovery ventilation chamber 13.

[0041] The hot water gas exchange chamber 14 is an empty cavity, with a horizontal water-gas heat exchange pipe group 111 installed inside and running through the hot water gas exchange chamber 14, and the cavity is filled with water.

[0042] The front end of the heat recovery exchange tube assembly 108 is connected to the static pressure hot air chamber 12 through the exhaust gas filter chamber 106. The exhaust gas filter chamber 106 is a cavity formed between the left side of the heat recovery air exchange chamber 13 and the oven shell 1, and an interception net 107 is installed inside it.

[0043] There is a cavity between the right side of the heat recovery ventilation chamber 13 and the right side of the hot water-gas exchange chamber 14 and the oven shell 1, forming an airflow channel. Therefore, the rear end of the heat recovery exchange tube assembly 108 is connected to the front end of the water-gas heat exchange tube assembly 111.

[0044] Behind the hot water gas exchange chamber 14 is a low-temperature plasma purification device 112, which is connected to the rear end of the water gas heat exchange pipe group 111. The air outlet of the low-temperature plasma purification device 112 is connected to the hot air return pipe 115 through the balanced exhaust fan 113. There is a three-way equalization duct 114 in the middle of the hot air return pipe 115, and the rear end is connected to the right side of the inner cavity of the heat recovery ventilation chamber 13. The left side of the inner cavity of the heat recovery ventilation chamber is connected to the circulating air chamber 11 through the circulating air chamber inlet pipe 103.

[0045] The technical solution of this invention includes smoke detectors 109 installed at high points on both sides of the oven 1, and a sprinkler fire suppression system 110 installed at the center of the top of the oven body. The sprinkler fire suppression system 110 includes a water pump at the bottom and a fire sprinkler head at the top, and draws water from the water inlet of the hot water gas exchange chamber 14. When the smoke detectors 109 detect a fire signal, the water pump drives water to spray from the fire sprinkler head to achieve the purpose of fire suppression.

[0046] like Figure 4 As shown, when the self-purifying intelligent tenter frame drying oven of the present invention is working, the 130-degree Celsius hot exhaust gas generated by the static pressure hot air chamber 12 is intercepted by the interception net 107 of the exhaust gas filter chamber 106, effectively separating the residual fabric particles and other residues from the exhaust gas, ensuring that the fabric particles and other particulate matter in the exhaust gas do not enter the subsequent processing procedures. The filtered hot exhaust gas enters the heat recovery exchange tube group 108 of the heat recovery ventilation chamber 13, where it forms a gas-to-gas heat exchange with the gas inside the shell of the heat recovery ventilation chamber, reducing the temperature to 100 degrees Celsius. Then, it enters the water-to-gas heat exchange tube group 111 of the upper hot water-to-gas exchange chamber 14, where it completes a water-to-gas heat exchange with the water source inside the shell of the hot water-to-gas exchange chamber 14, finally obtaining low-temperature exhaust gas of about 80 degrees Celsius. This low-temperature plasma purification device 112 is then used to remove harmful pollutants such as oil fumes, VOCs, and organic matter, resulting in purified clean gas that fully meets emission or reuse standards.

[0047] To maximize heat recovery and reduce the energy consumption of the circulating fan 102 in the oven 1, the present invention designs a system that transports the clean gas emitted by the low-temperature plasma purification device 112 back to the cavity of the heat recovery ventilation chamber 13 through the hot air return pipe 115. The gas then flows in the opposite direction to the high-temperature waste gas at 130 degrees Celsius through the heat recovery exchange pipe group 108, generating heat exchange and heating. The temperature of the heated gas is 110 degrees Celsius. It then returns to the circulating air chamber 11 through the circulating air chamber inlet pipe and is heated to 130 degrees Celsius by the heater 101, thus completing the heat recovery, purification, and reuse of the heated waste gas.

[0048] The aforementioned Figure 3 and Figure 4 The description of the embodiments shown is based on the airflow direction, the left and right are based on the view angle, and the temperature indicators are values ​​based on specific working conditions. All of these descriptions are for the convenience of understanding the embodiments of this case and should not be regarded as a limitation on the technical solution of the present invention.

[0049] As can be seen from the above embodiments and descriptions, the self-cleaning intelligent tenter frame drying oven of the present invention simplifies and reduces the traditionally designed shared, fixed external heat recovery and purification devices to be located inside the oven. This frees the number of ovens in the integrated tenter frame drying machine from the constraints of traditional fixed designs, allowing for flexible deployment based on actual production tasks. Furthermore, because the heat recovery and purification devices are integrated inside the oven, the piping travel is short, overall radiative heat dissipation is low, and the overall heat recovery efficiency is over 80%, making its energy-saving performance superior to traditional external designs.

[0050] like Figure 5 As shown, the water-gas heat exchange tube assembly 111 in the hot water-gas exchange chamber 14 has the same orientation as the longer side of the oven 1. The heat recovery exchange tube assembly in the lower heat recovery air exchange chamber also has the same orientation. Therefore, a longer gas-to-gas heat exchange and water-gas heat exchange path can be obtained, further improving the heat exchange efficiency.

[0051] like Figure 6 As shown, the outer wall of the heat recovery exchange tube assembly 108 has multiple heat dissipation fins of the same horizontal orientation. The multiple heat dissipation fins are arranged radially and evenly around the axis of the heat recovery exchange tube to increase the heat exchange contact area between the heated waste gas and the recovered clean gas and improve the heat exchange rate.

[0052] After multiple comparative experiments, the optimal heat exchange efficiency can be achieved when the diameter of the heat recovery exchange tube is 4-7 cm and the width of the heat dissipation fins is about half the diameter of the tube.

[0053] like Figure 7As shown, the integrated tenter frame machine using the self-cleaning intelligent tenter frame oven of the present invention can have its number of self-cleaning intelligent tenter frame ovens freely combined and adjusted to meet different work requirements.

[0054] To facilitate mobile deployment, movable pulley systems are installed at the bottom of each component of the tenter frame. This reduces the time required for replacement.

[0055] In summary, this invention provides a self-cleaning intelligent tenter frame drying oven and an integrated tenter frame drying and setting machine using this self-cleaning intelligent tenter frame drying oven. It features a simple structure, high energy efficiency, and can be freely combined to meet the small-batch, high-speed service requirements of today's textile printing and dyeing industry. However, the above descriptions are merely preferred embodiments of this invention. In actual deployment, due to different production process requirements, it is impossible to operate entirely according to the above embodiments. Therefore, the embodiments of this invention should not be construed as limitations on the invention. It should be noted that those skilled in the art can make several improvements and adjustments without departing from the technical principles of this invention, and these improvements and adjustments should also be considered within the effective protection scope of this invention.

Claims

1. A self-cleaning intelligent tenter frame drying oven, comprising a circulating air chamber at the bottom of the oven and a static pressure hot air chamber above the circulating air chamber, wherein the circulating air chamber contains a heater and a circulating fan, and a circulating air chamber inlet pipe draws in fresh air; the static pressure hot air chamber contains a hot air nozzle device, which has two layers, with a fabric conveying track in the middle, and a nozzle on the side of the hot air nozzle device facing the fabric; characterized in that: The oven contains a heat recovery ventilation chamber and a hot water gas exchange chamber. The heat recovery ventilation chamber is located above the static pressure hot air chamber, and the hot water air exchange chamber is located above the heat recovery ventilation chamber. A horizontal heat recovery exchange pipe assembly is installed in the heat recovery ventilation chamber, running through the heat recovery ventilation chamber. A horizontal water-gas heat exchange pipe assembly is installed in the hot water-gas exchange chamber, running through the hot water-gas exchange chamber; The front end of the heat recovery exchange tube assembly is connected to the static pressure hot air chamber through the exhaust gas filter chamber; the rear end is connected to the front end of the water-air heat exchange tube assembly. The rear end of the water-air heat exchange tube assembly is connected to the inlet of the low-temperature plasma purification device. The heat recovery exchange tube assembly in the heat recovery ventilation chamber and the water-gas heat exchange tube assembly in the hot water-gas exchange chamber are aligned with the longer side of the oven body. The outlet of the low-temperature plasma purification device is connected to a hot air recycling pipe via a balanced exhaust fan. The hot air return pipe has a three-way air distribution pipe in the middle, and the rear end connects to the heat recovery ventilation chamber. The other end of the heat recovery ventilation chamber is connected to the air inlet pipe of the circulating air chamber; The outer wall of the horizontal heat recovery exchange tube has multiple heat dissipation fins of the same horizontal orientation, which are evenly distributed radially around the axis of the heat recovery exchange tube. The diameter of the heat recovery exchange tube is 4-7 cm, and the width of the heat dissipation fins is half the diameter of the tube. Smoke detectors are installed at the high points on both sides of the oven. A sprinkler fire suppression system is installed at the top center of the oven. The sprinkler fire suppression system includes a water pump and fire sprinkler heads, and draws water from the water inlet of the hot water gas exchange chamber. The clean gas emitted by the low-temperature plasma purification device is transported back to the heat recovery air exchange chamber through the hot air return pipe. It then flows in the opposite direction to the 130-degree Celsius high-temperature waste gas through the heat recovery exchange pipe group, generating heat exchange and raising the temperature. The temperature of the heated gas is 110 degrees Celsius. It then returns to the circulating air chamber through the circulating air chamber inlet pipe, where it is heated to 130 degrees Celsius by the heater, completing the heat recovery purification and reuse of the heated waste gas.

2. The self-cleaning intelligent tenter frame drying oven according to claim 1, characterized in that, An interception net is installed inside the exhaust gas filtration chamber.

3. The self-cleaning intelligent tenter frame drying oven according to claim 1, characterized in that, The hot air return pipe is wrapped with insulation material.

4. A tenter frame and stenter integrated machine, characterized in that: The self-cleaning intelligent tenter frame drying oven described in claim 1 is used, and the number of such ovens can be freely combined and adjusted.

5. The tenter frame erecting and setting machine according to claim 4, characterized in that, Each component has a set of movable pulleys at its bottom.

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