Efficient hot steam recycling method

Abstract

The invention relates to the technical field of energy recovery, in particular to an efficient hot steam recycling method, and provides the following scheme aiming at the problems of low hot steam utilization rate, high hot steam energy loss, high production cost, poor steam circulation stability, low textile production economic benefit, low operation efficiency and the like in the prior art. Comprising the following steps that S1, waste heat recycling is conducted on the heat setting machine, and a waste heat recycling device is divided into two parts; the invention aims to reduce the energy consumption in the traditional textile production, improve the energy utilization efficiency and reduce the production cost by recovering and reusing the hot steam. Compared with the prior art, emission of hot steam and pollution to the environment are reduced, the emission amount of greenhouse gas is reduced, through optimization design and control means, the stability and operation efficiency of a steam circulation system are improved, and the production capacity and benefits of textile production are improved.

Description

Technical Field

[0001] The invention relates to the technical field of energy recovery, and in particular to a method for efficiently recycling hot steam. Background Art

[0002] With the continuous improvement of environmental awareness, the market demand for steam recovery devices is growing, and the future market prospects are broad. The global requirements for environmental protection are getting higher and higher, and the government and enterprises are continuously increasing their investment in environmental protection. As an important part of the environmental protection field, waste steam recovery has received more and more attention and recognition. With the continuous development of industry, more and more waste steam is generated by factories, and the demand for steam recovery devices is also increasing. At the same time, the technology of steam recovery devices is constantly developing, and the efficiency and quality of equipment are also constantly improving. This makes the application scope of steam recovery devices more extensive, and also provides more options for the sustainable development of industry energy.

[0003] Textile printing and dyeing is a major energy consumer. Every year, enterprises spend a lot of money on energy consumption to purchase coal and steam for desizing, scouring, rinsing, alkali steaming, pad dyeing, high temperature and high pressure overflow dyeing, roll dyeing, printing steaming, drying, heat setting, boiler continuous and regular sewage discharge, three-effect and expansion alkali recovery, water film dust removal and other processes in the production process. The energy sources mainly include electricity, fuel oil, gas and steam. How to use low-temperature waste heat to reduce the consumption of high-grade thermal energy is an important task for energy conservation and consumption reduction in the textile printing and dyeing industry. Therefore, we propose a method for efficient reuse of hot steam to solve the waste and energy consumption of hot steam in traditional textile production. This method achieves efficient utilization of energy and sustainable development of the environment by recycling and reusing hot steam in the heat setting process. Summary of the invention

[0004] The purpose of the present invention is to solve the problems of low hot steam utilization rate, high hot steam energy loss, high production cost, poor steam cycle stability, low economic benefit of textile production, low operating efficiency, etc. in the prior art, and to propose a method for efficiently recycling hot steam.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A method for efficiently recycling hot steam comprises the following steps:

[0007] S1: Recover the waste heat of the heat setting machine and divide the waste heat recovery device into two parts;

[0008] S2: The high-temperature exhaust gas generated by the setting machine enters the exhaust gas purifier after heat exchange;

[0009] S3: The open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collection tank;

[0010] S4: Recover the waste heat of the condensate from the sizing machine through the heat exchanger and transfer it back to the boiler under pressure through the centrifugal pump;

[0011] S5: Use decentralized installation technology to recover waste heat from the dryer;

[0012] S6: Establish a complete exhaust gas collection system and install an automatic steam device to store the waste heat of steam.

[0013] Preferably, in S1, the waste heat of the heat setting machine is recovered and utilized, and the waste heat recovery device is divided into two parts: a heat release zone and a heat absorption zone; in the heat absorption zone, high-temperature exhaust gas above 160°C passes through the waste heat recovery device, and the exhaust gas is cooled to 110-120°C for discharge, and part of its heat is absorbed by the heat exchanger to complete the heat absorption process; the heat absorbed by the heat exchanger is transferred to the other end of the heat transfer element through the phase change of the medium in the heat transfer element; in the heat release zone, the temperature of the heat transfer element is higher than that of the newly entered normal temperature air, and the medium in the heat pipe releases heat. After the heat is absorbed by the normal temperature air, the temperature is increased to 120°C, and the medium in the heat pipe undergoes a phase change and flows back to the heat absorption zone.

[0014] Preferably, in S1, high-temperature hot air at 120°C is sucked into the radiator in the oven of the setting machine through the negative pressure of the setting machine itself to continue heating. The recovery device is provided with steam and compressed air cleaning ports. During use, the steam and compressed air valves can be opened at any time to clean the dirt in the heat exchanger.

[0015] Preferably, in S2, the high-temperature exhaust gas generated by the stenter is subjected to heat exchange to reduce the temperature to below 80°C, enters the exhaust gas purifier, and enters the spraying area after slow flow, uniform flow and diffusion in the diversion area. The flue gas contacts the turbulent flow of high-pressure water mist in the spraying area. The harmful gases, fibers, dust and oil mist in the exhaust gas are captured by the water mist and flow into the oil-water separation tank through the drain port at the bottom of the purifier. The sewage is filtered in two stages to remove medium and long fibers and larger impurities.

[0016] Preferably, in S2, fine fibers and dust accumulate at the bottom of the box due to natural sedimentation; tiny oil droplets float to the water surface by their own buoyancy and gather into a floating oil layer, and the floating oil accumulates in the oil tank and is discharged into a preset oil barrel through an oil drain pipe; the precipitated and clean water is then supplied to the purifier for recycling through a circulating water pump; the gas after spray purification and cooling enters the dehydration area from the spray area, and the dehydrated clean gas is discharged into the atmosphere from the top of the purifier through the exhaust duct.

[0017] Preferably, in S3, the open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collecting tank, which is directly connected to the atmosphere. The steam and condensate are reduced to normal pressure and flash evaporated to form secondary steam and then discharged into the atmosphere, and the temperature of the remaining condensate drops to below 100°C.

[0018] Preferably, in S4, waste heat of condensate from the sizing machine is recovered through a heat exchanger, the temperature of condensate from the drying drum is reduced from about 100°C to 68°C before being discharged, the circulating water temperature is heated from 18°C ​​to 66°C before being utilized, and is input through a water inlet pipe and a filter. High-pressure steam generated by the boiler is supplied to the drying drum of the sizing machine for drying through a steam drum; condensate from the drying drum is collected by a steam trap through a closed pipeline into a water collecting tank, and is pressurized by a centrifugal pump and transported back to the boiler; flash steam in the water collecting tank is pressurized by a jet heat pump to a steam pipe for reuse; the steam pressure in the drying drum is 0.35MPa, and the condensate pressure in the closed pipeline reaches 0.2MPa, which is higher than the atmospheric pressure and does not come into contact with the outside atmosphere.

[0019] Preferably, in S5, a decentralized installation technology is used to recover waste heat from the dryer, hydrophilic coated aluminum foil is used as a heat transfer conductor and epoxy resin aluminum foil is used, a waste heat recovery modification device is installed at the outlet of the dryer ventilation system, and the waste heat recovery modification device is divided into a heat release zone and a heat absorption zone; each dryer is equipped with a set of waste heat recovery modification devices and corresponding hot return air ducts, and each dryer is equipped with a waste heat recovery modification device and 4 hot return air ducts.

[0020] Preferably, in S6, a complete exhaust gas collection system is established, and a washing method is used to centrally collect and purify the exhaust gas. The liquid is fully contacted with the oil fume gas, so that the oil fume components in the liquid enter the liquid phase, and then the purpose of oil and gas separation is achieved; in the washing tower, the exhaust gas is first evenly distributed in the entire washing tower to reduce the air flow speed; the liquid sprayed from the upper side spray is evenly distributed throughout the entire space, and the gas containing fine oil fume particles contacts the water mist, and the tiny oil fume and fine droplets are condensed, adsorbed, combined, and synthesized into larger particles that settle down, and the finer water particles enter the upper dehydration plate with the gas; the spiral dehydration plate generates centrifugal force to remove the fine water particles in the exhaust gas, and then discharges it out of the purification device.

[0021] Preferably, in S6, the automatic steam device is directly installed on the production line to store the waste heat of steam, and professionals use programmable control additional equipment to control the start and stop of the automatic steam device using a timer with central guidance technology when no one is watching.

[0022] The beneficial effects of the present invention are:

[0023] 1. Through waste heat recovery, the exhaust gas emission temperature is lower than 90°C, which can reduce the working energy consumption of oil fume purification equipment, reduce hot steam emissions, significantly reduce the power of purification equipment, achieve significant energy-saving effects, and greatly reduce production costs.

[0024] 2. Use a steam waste heat storage device. By using a steam machine to control the automatic steam device on demand, there is no need for a steam reserve system. Steam can be generated from the central unit and the eccentric unit, which improves the operating efficiency of the steam circulation system, improves the utilization rate of steam, and improves production efficiency.

[0025] The purpose of the present invention is to reduce energy consumption in traditional textile production, improve energy utilization efficiency, and reduce production costs by recycling and reusing hot steam; reduce the emission of hot steam and pollution to the environment, reduce the emission of greenhouse gases, and meet the requirements of sustainable development; through optimized design and control means, improve the stability and operation efficiency of the steam circulation system, and increase the production capacity and benefits of textile production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The present invention is a schematic flow diagram of a hot steam efficient recycling method. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Embodiment 1

[0029] Reference Figure 1 A method for efficiently recycling hot steam comprises the following steps:

[0030] S1: Recover the waste heat of the heat setting machine and divide the waste heat recovery device into two parts;

[0031] S2: The high-temperature exhaust gas generated by the setting machine enters the exhaust gas purifier after heat exchange;

[0032] S3: The open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collection tank;

[0033] S4: Recover the waste heat of the condensate from the sizing machine through the heat exchanger and transfer it back to the boiler under pressure through the centrifugal pump;

[0034] S5: Use decentralized installation technology to recover waste heat from the dryer;

[0035] S6: Establish a complete exhaust gas collection system and install an automatic steam device to store the waste heat of steam.

[0036] In this embodiment, the waste heat of the heat setting machine is recovered and utilized, and the waste heat recovery device is divided into two parts: a heat release zone and a heat absorption zone. In the heat absorption zone, high-temperature exhaust gas above 160°C passes through the waste heat recovery device, and the exhaust gas is cooled to 110°C for discharge, and part of its heat is absorbed by the heat exchanger to complete the heat absorption process. The heat absorbed by the heat exchanger is transferred to the other end of the heat transfer element through the phase change of the medium in the heat transfer element. In the heat release zone, the temperature of the heat transfer element is higher than that of the newly entered normal temperature air, and the medium in the heat pipe releases heat. After the heat is absorbed by the normal temperature air, the temperature rises to 120°C, and the medium in the heat pipe undergoes a phase change and flows back to the heat absorption zone.

[0037] In this embodiment, high-temperature hot air at 120°C is sucked into the radiator in the oven of the setting machine through the negative pressure of the setting machine itself to continue heating. The recovery device is provided with steam and compressed air cleaning ports. During use, the steam and compressed air valves can be opened at any time to clean the dirt in the heat exchanger.

[0038] In this embodiment, the high-temperature exhaust gas generated by the shaping machine is subjected to heat exchange to reduce the temperature to below 80°C and enters the exhaust gas purifier. After slow flow, uniform flow and diffusion in the diversion area, the flue gas enters the spray area. The flue gas contacts the turbulent flow of high-pressure water mist in the spray area. The harmful gases, fibers, dust and oil mist in the exhaust gas are captured by the water mist and flow into the oil-water separation tank through the drain port at the bottom of the purifier. The sewage is filtered in two stages to remove medium and long fibers and larger impurities.

[0039] In this embodiment, fine fibers and dust accumulate at the bottom of the box due to natural sedimentation; tiny oil droplets float to the water surface by their own buoyancy and gather into a floating oil layer. The floating oil accumulates in the oil tank and is discharged into a preset oil barrel through an oil drain pipe; the precipitated and clean water is then supplied to the purifier for recycling through a circulating water pump; the gas after spray purification and cooling enters the dehydration area from the spray area, and the dehydrated clean gas is discharged into the atmosphere through the exhaust duct from the top of the purifier.

[0040] In this embodiment, the open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collecting tank. The water collecting tank is directly connected to the atmosphere. The steam and condensate are reduced to normal pressure and flash evaporated to form secondary steam and then discharged into the atmosphere. The temperature of the remaining condensate drops to below 100°C.

[0041] In this embodiment, the waste heat of the condensate of the sizing machine is recovered by a heat exchanger, the temperature of the condensate of the drying drum is reduced from about 100°C to 68°C before being discharged, the circulating water temperature is heated from 18°C ​​to 66°C before being utilized, and is input through the water inlet pipe and the filter. The high-pressure steam generated by the boiler is supplied to the drying drum of the sizing machine for drying through the steam drum; the condensate of the drying drum is collected by the steam trap through a closed pipeline into a water collecting tank, and is pressurized by a centrifugal pump and transported back to the boiler; the flash steam in the water collecting tank is pressurized by a jet heat pump to the steam pipe for reuse; the steam pressure in the drying drum is 0.35MPa, and the condensate pressure in the closed pipeline reaches 0.2MPa, which is higher than the atmospheric pressure and does not come into contact with the outside atmosphere.

[0042] In this embodiment, a decentralized installation technology is adopted to recover the waste heat of the dryer, and hydrophilic coated aluminum foil and epoxy resin aluminum foil are used as heat transfer conductors. A waste heat recovery modification device is installed at the outlet of the dryer ventilation system, and the waste heat recovery modification device is divided into a heat release area and a heat absorption area. Each dryer is equipped with a set of waste heat recovery modification devices and corresponding hot return air ducts. Each dryer is equipped with a waste heat recovery modification device and 4 hot return air ducts.

[0043] In this embodiment, a complete exhaust gas collection system is established, and a washing method is used to centrally collect and purify the exhaust gas. The liquid is fully contacted with the oil fume gas, so that the oil fume components in the liquid enter the liquid phase, and then the purpose of oil and gas separation is achieved; in the washing tower, the exhaust gas is first evenly distributed in the entire washing tower to reduce the air flow speed; the liquid sprayed from the upper side spray is evenly distributed throughout the entire space, and the gas containing fine oil fume particles contacts the water mist, and the tiny oil fume and fine droplets condense and adsorb to combine into larger particles that settle down, and the finer water particles enter the upper dehydration plate with the gas; the spiral dehydration plate generates centrifugal force to remove the fine water particles in the exhaust gas, and then discharges it out of the purification device.

[0044] In this embodiment, the automatic steam device is directly installed on the production line to store the waste heat of steam. At the same time, professionals use programmable control additional equipment to control the start and stop of the automatic steam device using a timer with central guidance technology when no one is watching.

[0045] Embodiment 2

[0046] Reference Figure 1 A method for efficiently recycling hot steam comprises the following steps:

[0047] S1: Recover the waste heat of the heat setting machine and divide the waste heat recovery device into two parts;

[0048] S2: The high-temperature exhaust gas generated by the setting machine enters the exhaust gas purifier after heat exchange;

[0049] S3: The open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collection tank;

[0050] S4: Recover the waste heat of the condensate from the sizing machine through the heat exchanger and transfer it back to the boiler under pressure through the centrifugal pump;

[0051] S5: Use decentralized installation technology to recover waste heat from the dryer;

[0052] S6: Establish a complete exhaust gas collection system and install an automatic steam device to store the waste heat of steam.

[0053] In this embodiment, the waste heat of the heat setting machine is recovered and utilized, and the waste heat recovery device is divided into two parts: a heat release zone and a heat absorption zone. In the heat absorption zone, high-temperature exhaust gas above 160°C passes through the waste heat recovery device, and the exhaust gas is cooled to 112°C for discharge, and part of its heat is absorbed by the heat exchanger to complete the heat absorption process. In the heat release zone, the temperature of the heat transfer element is higher than that of the newly entered normal temperature air, and the medium in the heat pipe releases heat. After the heat is absorbed by the normal temperature air, the temperature rises to 120°C, and the medium in the heat pipe undergoes phase change and flows back to the heat absorption zone.

[0054] In this embodiment, high-temperature hot air at 120°C is sucked into the radiator in the oven of the setting machine through the negative pressure of the setting machine itself to continue heating. The recovery device is provided with steam and compressed air cleaning ports. During use, the steam and compressed air valves can be opened at any time to clean the dirt in the heat exchanger.

[0055] In this embodiment, the high-temperature exhaust gas generated by the stenter is subjected to heat exchange to reduce the temperature to below 80°C and enters the exhaust gas purifier. The harmful gases, fibers, dust, and oil mist in the exhaust gas are captured by water mist and flow into the oil-water separation tank through the drain port at the bottom of the purifier to filter out medium and long fibers and larger impurities.

[0056] In this embodiment, fine fibers and dust accumulate at the bottom of the box due to natural sedimentation; tiny oil droplets float to the water surface by their own buoyancy and gather into a floating oil layer. The floating oil accumulates in the oil tank and is discharged into a preset oil barrel through an oil drain pipe; the precipitated and clean water is then supplied to the purifier for recycling through a circulating water pump.

[0057] In this embodiment, the open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collecting tank. The water collecting tank is directly connected to the atmosphere. The steam and condensate are reduced to normal pressure and flash evaporated to form secondary steam and then discharged into the atmosphere. The temperature of the remaining condensate drops to below 100°C.

[0058] In this embodiment, the waste heat of the condensate of the yarn sizing machine is recovered through a heat exchanger, the temperature of the condensate of the drying cylinder is reduced from about 100°C to 68°C before being discharged, and the circulating water temperature is heated from 18°C ​​to 66°C before being utilized, and is input through a water inlet pipe and a filter. The flash steam in the water collecting tank is pressurized by a jet heat pump to the steam pipe for reuse; the steam pressure in the drying cylinder is 0.35MPa, and the condensate pressure in the closed pipeline reaches 0.2MPa, which is higher than the atmospheric pressure and does not come into contact with the outside atmosphere.

[0059] In this embodiment, a decentralized installation technology is used to recover the waste heat of the dryer, and hydrophilic coated aluminum foil and epoxy resin aluminum foil are used as heat transfer conductors. Each dryer is equipped with a set of waste heat recovery modification devices and corresponding hot return air ducts. Each dryer is equipped with a waste heat recovery modification device and 4 hot return air ducts.

[0060] In this embodiment, a complete exhaust gas collection system is established, and a washing method is used to centrally collect and purify the exhaust gas. The liquid is fully in contact with the oil fume gas, so that the oil fume components in the liquid enter the liquid phase, and then the purpose of oil and gas separation is achieved; in the washing tower, the exhaust gas is first evenly distributed in the entire washing tower to reduce the air flow speed; the liquid sprayed from the upper side is evenly distributed throughout the space, and the spiral dehydration plate generates centrifugal force to remove fine water particles in the exhaust gas, and then discharged out of the purification device.

[0061] In this embodiment, the automatic steam device is directly installed on the production line to store the waste heat of steam. At the same time, professionals use programmable control additional equipment to control the start and stop of the automatic steam device using a timer with central guidance technology when no one is watching.

[0062] Embodiment 3

[0063] Reference Figure 1 A method for efficiently recycling hot steam comprises the following steps:

[0064] S1: Recover the waste heat of the heat setting machine and divide the waste heat recovery device into two parts;

[0065] S2: The high-temperature exhaust gas generated by the setting machine enters the exhaust gas purifier after heat exchange;

[0066] S3: The open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collection tank;

[0067] S4: Recover the waste heat of the condensate from the sizing machine through the heat exchanger and transfer it back to the boiler under pressure through the centrifugal pump;

[0068] S5: Use decentralized installation technology to recover waste heat from the dryer;

[0069] S6: Establish a complete exhaust gas collection system and install an automatic steam device to store the waste heat of steam.

[0070] In this embodiment, the waste heat of the heat setting machine is recovered and utilized, and the waste heat recovery device is divided into two parts: a heat release zone and a heat absorption zone. In the heat absorption zone, high-temperature exhaust gas above 160°C passes through the waste heat recovery device, and the exhaust gas is cooled to 114°C before being discharged. The heat absorbed by the heat exchanger is transferred to the other end of the heat transfer element through the phase change of the medium in the heat transfer element. In the heat release zone, the temperature of the heat transfer element is higher than that of the newly entered normal temperature air, and the medium in the heat pipe releases heat.

[0071] In this embodiment, high-temperature hot air at 120°C is sucked into the radiator in the oven of the setting machine through the negative pressure of the setting machine itself to continue heating. The recovery device is provided with steam and compressed air cleaning ports. During use, the steam and compressed air valves can be opened at any time to clean the dirt in the heat exchanger.

[0072] In this embodiment, the high-temperature exhaust gas generated by the setting machine is subjected to heat exchange to reduce the temperature to below 80°C and enters the exhaust gas purifier. The harmful gases, fibers, dust, and oil mist in the exhaust gas are captured by the water mist and flow into the oil-water separation tank through the drain port at the bottom of the purifier. The sewage is filtered in two stages to remove medium and long fibers and larger impurities.

[0073] In this embodiment, fine fibers and dust accumulate at the bottom of the box due to natural sedimentation; tiny oil droplets float to the water surface by their own buoyancy and gather into a floating oil layer. The floating oil accumulates in the oil tank and is discharged into a preset oil barrel through an oil drain pipe; the precipitated and clean water is then supplied to the purifier for recycling through a circulating water pump; the gas after spray purification and cooling enters the dehydration area from the spray area, and the dehydrated clean gas is discharged into the atmosphere through the exhaust duct from the top of the purifier.

[0074] In this embodiment, the open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collecting tank. The water collecting tank is directly connected to the atmosphere. The steam and condensate are reduced to normal pressure and flash evaporated to form secondary steam and then discharged into the atmosphere. The temperature of the remaining condensate drops to below 100°C.

[0075] In this embodiment, the waste heat of the condensate of the sizing machine is recovered by a heat exchanger, and the temperature of the condensate of the drying drum is reduced from about 100°C to 68°C before being discharged. The condensate of the drying drum is collected by the steam trap through a closed pipeline to a water collecting tank, and is pressurized by a centrifugal pump and transported back to the boiler; the flash steam in the water collecting tank is pressurized by a jet heat pump to the steam pipe for reuse; the steam pressure in the drying drum is 0.35MPa, and the condensate pressure in the closed pipeline reaches 0.2MPa, which is higher than the atmospheric pressure and does not come into contact with the outside atmosphere.

[0076] In this embodiment, a decentralized installation technology is used to recover the waste heat of the dryer, and hydrophilic coated aluminum foil and epoxy resin aluminum foil are used as heat transfer conductors. Each dryer is equipped with a set of waste heat recovery modification devices and corresponding hot return air ducts. Each dryer is equipped with a waste heat recovery modification device and 4 hot return air ducts.

[0077] In this embodiment, a complete waste gas collection system is established, and a washing method is used to centrally collect and purify the waste gas. The liquid is fully in contact with the oil fume gas, so that the oil fume components in the liquid enter the liquid phase, and then the purpose of oil and gas separation is achieved; the tiny oil smoke and fine droplets are condensed and adsorbed to form larger particles that settle down, and the finer water particles enter the upper dehydration plate with the gas; the spiral dehydration plate generates centrifugal force to remove the fine water particles in the waste gas, and then discharge it out of the purification device.

[0078] In this embodiment, the automatic steam device is directly installed on the production line to store the waste heat of steam. At the same time, professionals use programmable control additional equipment to control the start and stop of the automatic steam device using a timer with central guidance technology when no one is watching.

[0079] Embodiment 4

[0080] Reference Figure 1 A method for efficiently recycling hot steam comprises the following steps:

[0081] S1: Recover the waste heat of the heat setting machine and divide the waste heat recovery device into two parts;

[0082] S2: The high-temperature exhaust gas generated by the setting machine enters the exhaust gas purifier after heat exchange;

[0083] S3: The open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collection tank;

[0084] S4: Recover the waste heat of the condensate from the sizing machine through the heat exchanger and transfer it back to the boiler under pressure through the centrifugal pump;

[0085] S5: Use decentralized installation technology to recover waste heat from the dryer;

[0086] S6: Establish a complete exhaust gas collection system and install an automatic steam device to store the waste heat of steam.

[0087] In this embodiment, the waste heat of the heat setting machine is recovered and utilized, and the waste heat recovery device is divided into two parts: a heat release zone and a heat absorption zone. In the heat absorption zone, the high-temperature exhaust gas above 160°C passes through the waste heat recovery device, and the exhaust gas is cooled to 118°C before being discharged, and the heat is transferred to the other end of the heat transfer element. In the heat release zone, the temperature of the heat transfer element is higher than that of the newly entered normal temperature air. After the heat is absorbed by the normal temperature air, the temperature rises to 120°C, and the medium in the heat pipe undergoes phase change and flows back to the heat absorption zone.

[0088] In this embodiment, high-temperature hot air at 120°C is sucked into the radiator in the oven of the setting machine through the negative pressure of the setting machine itself to continue heating. The recovery device is provided with steam and compressed air cleaning ports. During use, the steam and compressed air valves can be opened at any time to clean the dirt in the heat exchanger.

[0089] In this embodiment, the high-temperature exhaust gas generated by the setting machine is subjected to heat exchange to reduce the temperature to below 80°C and enters the exhaust gas purifier. The flue gas contacts the turbulent flow of high-pressure water mist in the spray area. The harmful gases, fibers, dust, and oil mist in the exhaust gas are captured by the water mist and flow into the oil-water separation tank through the drain port at the bottom of the purifier. The sewage is filtered in two stages to remove medium and long fibers and larger impurities.

[0090] In this embodiment, fine fibers and dust accumulate at the bottom of the box due to natural sedimentation; tiny oil droplets float to the water surface by their own buoyancy and gather into a floating oil layer. The floating oil accumulates in the oil tank and is discharged into a preset oil barrel through an oil drain pipe; the precipitated and clean water is then supplied to the purifier for recycling through a circulating water pump; the gas after spray purification and cooling enters the dehydration area from the spray area, and the dehydrated clean gas is discharged into the atmosphere through the exhaust duct from the top of the purifier.

[0091] In this embodiment, the open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collecting tank. The water collecting tank is directly connected to the atmosphere. The steam and condensate are reduced to normal pressure and flash evaporated to form secondary steam and then discharged into the atmosphere. The temperature of the remaining condensate drops to below 100°C.

[0092] In this embodiment, the waste heat of the condensate of the sizing machine is recovered by a heat exchanger, the temperature of the condensate of the drying drum is reduced from about 100°C to 68°C and then discharged, and the high-pressure steam generated by the boiler is supplied to the drying drum of the sizing machine for drying through a steam drum; the condensate of the drying drum is collected by the steam trap through a closed pipeline to a water collecting tank, and the flash steam in the water collecting tank is pressurized by a jet heat pump to a steam pipe for reuse; the steam pressure in the drying drum is 0.35MPa.

[0093] In this embodiment, a decentralized installation technology is used to recover waste heat from the dryer. Hydrophilic coated aluminum foil and epoxy resin aluminum foil are used as heat transfer conductors. A waste heat recovery modification device is installed at the outlet of the dryer ventilation system. Each dryer is equipped with a set of waste heat recovery modification devices and corresponding hot return air ducts. Each dryer is equipped with a waste heat recovery modification device and 4 hot return air ducts.

[0094] In this embodiment, a complete exhaust gas collection system is established, and a washing method is used to centrally collect and purify the exhaust gas. The liquid is fully in contact with the oil fume gas, and the exhaust gas is first evenly distributed in the entire washing tower in the washing tower to reduce the air flow speed; the liquid sprayed from the upper side is evenly distributed throughout the space, and the gas containing fine particles of oil fume contacts the water mist, and the spiral dehydration plate generates centrifugal force to remove the fine water particles in the exhaust gas, and then discharges it out of the purification device.

[0095] In this embodiment, the automatic steam device is directly installed on the production line to store the waste heat of steam. At the same time, professionals use programmable control additional equipment to control the start and stop of the automatic steam device using a timer with central guidance technology when no one is watching.

[0096] Embodiment 5

[0097] Reference Figure 1 A method for efficiently recycling hot steam comprises the following steps:

[0098] S1: Recover the waste heat of the heat setting machine and divide the waste heat recovery device into two parts;

[0099] S2: The high-temperature exhaust gas generated by the setting machine enters the exhaust gas purifier after heat exchange;

[0100] S3: The open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collection tank;

[0101] S4: Recover the waste heat of the condensate from the sizing machine through the heat exchanger and transfer it back to the boiler under pressure through the centrifugal pump;

[0102] S5: Use decentralized installation technology to recover waste heat from the dryer;

[0103] S6: Establish a complete exhaust gas collection system and install an automatic steam device to store the waste heat of steam.

[0104] In this embodiment, the waste heat of the heat setting machine is recovered and utilized, and the waste heat recovery device is divided into two parts: a heat release zone and a heat absorption zone. In the heat absorption zone, high-temperature exhaust gas above 160°C passes through the waste heat recovery device, and the exhaust gas is cooled to 120°C for discharge, and part of its heat is absorbed by the heat exchanger to complete the heat absorption process. In the heat release zone, the temperature of the heat transfer element is higher than that of the newly entered normal temperature air, and the medium in the heat pipe releases heat. After the heat is absorbed by the normal temperature air, the temperature rises to 120°C, and the medium in the heat pipe undergoes phase change and flows back to the heat absorption zone.

[0105] In this embodiment, high-temperature hot air at 120°C is sucked into the radiator in the oven of the setting machine through the negative pressure of the setting machine itself to continue heating. The recovery device is provided with steam and compressed air cleaning ports. During use, the steam and compressed air valves can be opened at any time to clean the dirt in the heat exchanger.

[0106] In this embodiment, the high-temperature exhaust gas generated by the setting machine is subjected to heat exchange to reduce the temperature to below 80°C and enters the exhaust gas purifier. The harmful gases, fibers, dust, and oil mist in the exhaust gas are captured by the water mist and flow into the oil-water separation tank through the drain port at the bottom of the purifier. The sewage is filtered in two stages to remove medium and long fibers and larger impurities.

[0107] In this embodiment, fine fibers and dust accumulate at the bottom of the box due to natural sedimentation; tiny oil droplets float to the water surface by their own buoyancy and gather into a floating oil layer. The floating oil accumulates in the oil tank and is discharged into a preset oil barrel through an oil drain pipe; the dehydrated clean gas is discharged into the atmosphere through the exhaust duct from the top of the purifier.

[0108] In this embodiment, the open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collecting tank. The water collecting tank is directly connected to the atmosphere. The steam and condensate are reduced to normal pressure and flash evaporated to form secondary steam and then discharged into the atmosphere. The temperature of the remaining condensate drops to below 100°C.

[0109] In this embodiment, waste heat of condensate from the sizing machine is recovered through a heat exchanger, and the temperature of condensate from the drying drum is reduced from about 100°C to 68°C before being discharged. The high-pressure steam generated by the boiler is supplied to the drying drum of the sizing machine for drying through a steam drum; the condensate from the drying drum is collected by a steam trap through a closed pipeline into a water collecting tank, and is pressurized by a centrifugal pump and transported back to the boiler; the flash steam in the water collecting tank is pressurized by a jet heat pump to a steam pipe for reuse, and the condensate pressure in the closed pipeline reaches 0.2MPa, which is higher than the atmospheric pressure and does not come into contact with the outside atmosphere.

[0110] In this embodiment, a decentralized installation technology is used to recover the waste heat of the dryer, and hydrophilic coated aluminum foil and epoxy resin aluminum foil are used as heat transfer conductors. Each dryer is equipped with a set of waste heat recovery modification devices and corresponding hot return air ducts. Each dryer is equipped with a waste heat recovery modification device and 4 hot return air ducts.

[0111] In this embodiment, a complete exhaust gas collection system is established, and a washing method is used to centrally collect and purify the exhaust gas. The liquid is fully contacted with the oil fume gas, so that the oil fume components in the liquid enter the liquid phase, and then the purpose of oil and gas separation is achieved; in the washing tower, the exhaust gas is first evenly distributed in the entire washing tower to reduce the air flow speed; the liquid sprayed from the upper spray is evenly distributed throughout the space, and the tiny oil smoke and fine droplets are condensed and adsorbed to form larger particles that settle down, and the finer water particles enter the upper dehydration plate with the gas; the spiral dehydration plate generates centrifugal force to remove the fine water particles in the exhaust gas, and then discharges it out of the purification device.

[0112] In this embodiment, the automatic steam device is directly installed on the production line to store the waste heat of steam. At the same time, professionals use programmable control additional equipment to control the start and stop of the automatic steam device using a timer with central guidance technology when no one is watching.

[0113] Experimental example

[0114] A method for efficiently recycling hot steam according to Example 1, Example 2, Example 3, Example 4 and Example 5 was tested, and the results were as follows:

[0115]

[0116] Compared with the existing hot steam efficient recycling method, the hot steam efficient recycling method of Example 1, Example 2, Example 3, Example 4 and Example 5 has significantly reduced investment costs and significantly improved operating efficiency, and Example 1 is the best embodiment.

[0117] Test report

[0118] The purpose of the present invention is to propose a method for efficiently recycling hot steam in order to address the problems of low hot steam utilization rate, high hot steam energy loss, high production cost, poor steam cycle stability, low economic benefit of textile production, and low operating efficiency in the prior art. By recycling and reusing hot steam, the energy consumption in traditional textile production is reduced, the energy utilization efficiency is improved, and the production cost is reduced; the emission of hot steam and the pollution to the environment are reduced, and the emission of greenhouse gases is reduced, which meets the requirements of sustainable development; through optimized design and control means, the stability and operating efficiency of the steam circulation system are improved, and the production capacity and benefits of textile production are increased.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents, but these modifications and replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for efficiently recycling hot steam, characterized in that: The following steps are involved: S1: Recover the waste heat of the heat setting machine and divide the waste heat recovery device into two parts; S2: The high-temperature exhaust gas generated by the setting machine enters the exhaust gas purifier after heat exchange; S3: The open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collection tank; S4: Recover the waste heat of the condensate from the sizing machine through the heat exchanger and transfer it back to the boiler under pressure through the centrifugal pump; S5: Use decentralized installation technology to recover waste heat from the dryer; S6: Establish a complete exhaust gas collection system and install an automatic steam device to store the waste heat of steam.

2. A method for efficiently recycling hot steam according to claim 1, characterized in that: In S1, the waste heat of the heat setting machine is recovered and utilized, and the waste heat recovery device is divided into two parts: a heat release zone and a heat absorption zone. In the heat absorption zone, high-temperature exhaust gas above 160°C passes through the waste heat recovery device, and the exhaust gas is cooled to 110-120°C for discharge, and part of its heat is absorbed by the heat exchanger to complete the heat absorption process. The heat absorbed by the heat exchanger is transferred to the other end of the heat transfer element through the phase change of the medium in the heat transfer element. In the heat release zone, the temperature of the heat transfer element is higher than that of the newly entered normal temperature air, and the medium in the heat pipe releases heat. After the heat is absorbed by the normal temperature air, the temperature is increased to 120°C, and the medium in the heat pipe undergoes a phase change and flows back to the heat absorption zone.

3. A method for efficiently recycling hot steam according to claim 2, characterized in that: In S1, the high-temperature hot air of 120°C is sucked into the radiator in the oven of the setting machine through the negative pressure of the setting machine itself to continue heating. The recovery device is provided with steam and compressed air cleaning ports. During use, the steam and compressed air valves can be opened at any time to clean the dirt in the heat exchanger.

4. A method for efficiently recycling hot steam according to claim 1, characterized in that: In S2, the high-temperature exhaust gas generated by the setting machine is subjected to heat exchange to reduce the temperature to below 80°C and enters the exhaust gas purifier. After slow flow, uniform flow and diffusion in the diversion area, the exhaust gas enters the spraying area. The flue gas contacts the turbulent flow of high-pressure water mist in the spraying area. The harmful gases, fibers, dust and oil mist in the exhaust gas are captured by the water mist and flow into the oil-water separation tank through the drain port at the bottom of the purifier. The sewage is filtered in two stages to remove medium and long fibers and larger impurities.

5. A method for efficiently recycling hot steam according to claim 4, characterized in that: In S2, fine fibers and dust accumulate at the bottom of the box due to natural sedimentation; small oil droplets float to the water surface by their own buoyancy and gather into a floating oil layer. The floating oil accumulates in the oil tank and is discharged into a preset oil barrel through an oil drain pipe; the precipitated and clean water is then supplied to the purifier for recycling through a circulating water pump; the gas after spray purification and cooling enters the dehydration area from the spray area, and the dehydrated clean gas is discharged into the atmosphere from the top of the purifier through the exhaust duct.

6. A method for efficiently recycling hot steam according to claim 1, characterized in that: In S3, the open recovery system recovers the steam condensate discharged from the steam-using equipment into an open water collecting tank, which is directly connected to the atmosphere. The steam and condensate are reduced to normal pressure and flash evaporated to form secondary steam, which is then discharged into the atmosphere. The temperature of the remaining condensate drops to below 100°C.

7. A method for efficiently recycling hot steam according to claim 1, characterized in that: In S4, the waste heat of the condensate of the sizing machine is recovered by the heat exchanger, the temperature of the condensate of the drying drum is reduced from about 100°C to 68°C before being discharged, the circulating water temperature is heated from 18°C ​​to 66°C before being utilized, and is input through the water inlet pipe and the filter. The high-pressure steam generated by the boiler is supplied to the drying drum of the sizing machine through the steam drum for drying; the condensate of the drying drum is collected by the steam trap through a closed pipeline to the water collecting tank, and is pressurized by a centrifugal pump and transported back to the boiler; the flash steam in the water collecting tank is pressurized by a jet heat pump to the steam pipe for reuse; the steam pressure in the drying drum is 0.35MPa, and the condensate pressure in the closed pipeline reaches 0.2MPa, which is higher than the atmospheric pressure and does not contact the outside atmosphere.

8. A method for efficiently recycling hot steam according to claim 1, characterized in that: In S5, a decentralized installation technology is used to recover waste heat from the dryer, hydrophilic coated aluminum foil and epoxy resin aluminum foil are used as heat transfer conductors, a waste heat recovery modification device is installed at the outlet of the dryer ventilation system, and the waste heat recovery modification device is divided into a heat release zone and a heat absorption zone; each dryer is equipped with a set of waste heat recovery modification devices and corresponding hot return air ducts, and each dryer is equipped with a waste heat recovery modification device and 4 hot return air ducts.

9. A method for efficiently recycling hot steam according to claim 1, characterized in that: In the S6, a complete exhaust gas collection system is established, and the exhaust gas is centrally collected and purified by a washing method. The liquid is fully contacted with the oil fume gas, so that the oil fume components in the liquid enter the liquid phase, and then the purpose of oil and gas separation is achieved; in the washing tower, the exhaust gas is first evenly distributed in the entire washing tower to reduce the air flow speed; the liquid sprayed from the upper side spray is evenly distributed throughout the entire space, and the gas containing fine oil fume particles contacts the water mist, and the tiny oil fume and fine droplets condense, adsorb, and combine to form larger particles that settle down, and the finer water particles enter the upper dehydration plate with the gas; the spiral dehydration plate generates centrifugal force to remove the fine water particles in the exhaust gas, and then discharges it out of the purification device.

10. A method for efficiently recycling hot steam according to claim 1, characterized in that: In the S6, the automatic steam device is directly installed on the production line to store the waste heat of steam. At the same time, professionals use programmable control additional equipment to control the start and stop of the automatic steam device using a timer with central guidance technology when no one is watching.

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