Gradient cooling process and device for ES fiber preparation

Abstract

The invention discloses a gradient cooling process and device for ES fiber preparation, a cooling chamber door is arranged on the side face of a heat insulation cooling chamber, an air inlet silencer is arranged at the top of the heat insulation cooling chamber, the air inlet silencer is connected with an air inlet pump through a pipeline, the air inlet pump is connected with an air inlet pipe, and the air inlet pipe is connected with an air outlet of the heat insulation cooling chamber. According to the gradient cooling process and the gradient cooling device for ES fiber preparation, the conditions that rapid cooling is needed after heat treatment, in the prior art, fibers are directly placed in water to be cooled, the water consumption is large, and the use cost is high are improved, the cooling process is divided into two steps, in the first step, high-temperature fibers are cooled through high-speed water mist and air, and in the second step, the high-temperature fibers are cooled through high-speed water mist and air; and after that, redundant heat is removed in an air cooling manner, so that the water consumption is reduced, the energy consumption is reduced, and the economic benefit is improved.

Description

Technical Field

[0001] The invention relates to the technical field of ES fiber production, and in particular to a gradient cooling process and a device for preparing ES fibers. Background Art

[0002] ES fiber is the abbreviation of "Ethylene-Propylene Side By Side" in English. It is a kind of polyolefin fiber developed by Chisso Corporation of Japan. As a new type of thermal bonding composite fiber, ES fiber has received high praise in the world.

[0003] ES fiber is a two-component composite fiber with a core-skin structure. The skin layer has a low melting point and good softness, while the core layer has a high melting point and high strength. After heat treatment, part of the skin layer melts and acts as a bond, while the rest remains in a fiber state and has the characteristic of low thermal shrinkage. This fiber is particularly suitable for the production of sanitary materials, thermal insulation filling materials, filter materials and other products using hot air penetration technology;

[0004] According to the different raw materials, the ES fibers on the market are mainly divided into PE / PP and PE / PET, and the product specifications are mainly 1.5-6D. After the ES fibers are heat-treated, the fibers are bonded to each other to form a non-woven fabric without adhesive. Different heat treatment methods can be selected to obtain non-woven fabrics with different effects. For example: hot air bonding type - fluffy non-woven fabric, hot rolling bonding type - high-strength non-woven fabric;

[0005] After heat treatment, the temperature needs to be quickly cooled. The existing technology directly puts the fiber in water for cooling, which consumes a lot of water and has high cost. Summary of the invention

[0006] Therefore, in view of the above problems, the present invention proposes a gradient cooling process and device for preparing ES fibers, which solves the need for rapid cooling after heat treatment. The prior art directly places the fibers in water for cooling, which consumes a lot of water and has high cost.

[0007] To achieve the above object, the present invention adopts the following technical solution: a gradient cooling process for preparing ES fibers, the steps of which include:

[0008] 1) The container and the ES fiber loaded therein are taken out of the heat treatment chamber, and sent into the air cooling chamber to input room temperature air mixed with atomized water for rapid cooling for 1-2 minutes, so that the temperature is rapidly reduced from 170-180 degrees Celsius in the heat treatment chamber to 80-90 degrees Celsius;

[0009] 2) After cooling to 80-90 degrees Celsius, take it out of the air-cooling room using a forklift, and then place it in a light-proof, ventilated room or equipment with low wind speed for 10-30 minutes, and cool it to below 60 degrees Celsius. In this process, the moisture adhered in step 1 is dissipated by evaporation;

[0010] 3) The fiber and the container in which it is loaded are then placed in a ventilated storage room or workshop to cool naturally to room temperature. Furthermore, the structure includes an air cooling chamber and a ventilation chamber, and the cold air chamber is provided separately or on the same production line.

[0011] Furthermore, the air-cooled chamber includes an insulated cooling chamber, a cooling chamber door, an air intake muffler, an air intake pump, an air intake pipe, an air distribution plate, a water inlet pipe, an atomizing nozzle, a container bracket, a lower water tank, a drain pipe, a water vapor separator, an exhaust pipe, and an exhaust pump. A cooling chamber door is arranged on the side of the insulated cooling chamber, an air intake muffler is arranged on the top of the insulated cooling chamber, the air intake muffler is connected to the air intake pump through a pipeline, the air intake pump is connected to the air intake pipe, the air intake pipe is connected to the interior of the insulated cooling chamber, the air intake pipe is connected to a plurality of air distribution plates, a row of atomizing nozzles is arranged between every two air distribution plates, the atomizing nozzle is connected to the water inlet pipe, a container bracket is arranged inside the insulated cooling chamber, a lower water tank is arranged at the bottom of the interior of the insulated cooling chamber, the lower water tank is connected to the drain pipe, an exhaust pipe is arranged at the lower part of the left side of the insulated cooling chamber, a water vapor separator is arranged on the exhaust pipe, and the rear end of the exhaust pipe is connected to the exhaust pump.

[0012] Furthermore, an air intake filter for preventing dust is arranged at the front end of the air intake muffler.

[0013] Furthermore, the air distribution plate is made of stainless steel, has a structure for blowing air downward, and has a plurality of air outlets disposed on the bottom surface of the air distribution plate.

[0014] Furthermore, the ventilation chamber includes a ventilation chamber body, a conveyor belt, a ventilation air pump, an air intake filter, a side blowing air pipe, a ventilation chamber nozzle, and an upper ventilation pipe. A conveyor belt is arranged inside the ventilation chamber body, a ventilation air pump is arranged on the top of the ventilation chamber body, an air intake filter is arranged at the front end of the ventilation air pump, the output end of the ventilation air pump is connected to the side blowing air pipe and the upper ventilation pipe, ventilation chamber nozzles are arranged on the side blowing air pipe and the upper ventilation pipe, and the side blowing air pipe is arranged on the left side of the ventilation chamber body and the ventilation chamber nozzle on its upper part is arranged to face right.

[0015] Furthermore, the room temperature air mixed with the atomized water is sent into the air cooling chamber for rapid cooling for 1 minute, wherein the volume ratio of the ventilation volume to the atomized water volume is 100:1, so that the temperature is rapidly reduced from 170 degrees Celsius in the heat treatment chamber to 80 degrees Celsius.

[0016] Furthermore, the ventilation room is subjected to low wind speed air supply treatment at 1 m / s for 20 minutes, and the room temperature is 25 degrees Celsius, and then cooled to below 40 degrees Celsius.

[0017] Furthermore, the container for loading the ES fibers is a porous structure.

[0018] By adopting the aforementioned technical scheme, the beneficial effects of the present invention are as follows: the gradient cooling process and the device for preparing ES fibers improve the need for rapid cooling after heat treatment. The prior art directly places the fibers in water for cooling, which consumes a lot of water and has high use costs. The cooling process is divided into two steps. In the first step, the high-temperature fibers are cooled using high-speed water mist and air to quickly stabilize and shape their properties and structure. After that, air cooling is used to remove excess heat, thereby reducing water consumption, reducing energy consumption, and improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the air cooling chamber of the present invention;

[0020] Figure 2 It is a schematic diagram of the ventilation chamber structure of the present invention.

[0021] In the figure: 1. Insulated cooling chamber; 2. Cooling chamber door; 3. Intake muffler; 4. Intake pump; 5. Intake pipe; 6. Air distribution plate; 7. Water inlet pipe; 8. Atomizing nozzle; 9. Container bracket; 10. Lower sink; 11. Drain pipe; 12. Water-gas separator; 13. Exhaust pipe; 14. Exhaust pump; 21. Ventilation chamber body; 22. Conveyor belt; 23. Ventilation air pump; 24. Intake filter; 25. Side blowing air pipe; 26. Ventilation chamber nozzle; 27. Upper ventilation pipe. DETAILED DESCRIPTION

[0022] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0023] refer to Figure 1-Figure 2 This embodiment provides a gradient cooling process and device for preparing ES fibers, the steps of which include:

[0024] 1. Take the container and the ES fiber loaded inside it out of the heat treatment chamber, send them into the air cooling chamber, input normal temperature air mixed with atomized water for rapid cooling for 1-2 minutes, so that the temperature drops rapidly from 170-180 degrees Celsius in the heat treatment chamber to 80-90 degrees Celsius;

[0025] 2. After cooling to 80-90 degrees Celsius, take it out of the air-cooling room with a forklift, and then place it in a light-proof, ventilated room or equipment with low wind speed for 10-30 minutes, and cool it to below 60 degrees Celsius. In this process, the moisture adhered in step 1 is dissipated by evaporation;

[0026] 3. The fiber and the container in which it is loaded are then placed in a ventilated storage room or workshop to cool naturally to room temperature. The structure includes an air cooling room and a ventilation room, and the cold air room is set separately or on the same production line.

[0027] The air cooling chamber comprises an insulated cooling chamber 1, a cooling chamber door 2, an air intake muffler 3, an air intake pump 4, an air intake pipe 5, an air distribution plate 6, a water inlet pipe 7, an atomizing nozzle 8, a container bracket 9, a lower water tank 10, a drain pipe 11, a water vapor separator 12, an exhaust pipe 13, and an exhaust pump 14. The cooling chamber door 2 is arranged on the side of the insulated cooling chamber 1, and the air intake muffler 3 is arranged on the top of the insulated cooling chamber 1. The air intake muffler 3 is connected to the air intake pump 4 through a pipeline, and the air intake pump 4 is connected to the air intake pipe 5. The air intake pipe 5 is connected to the insulated cooling chamber 1. Inside the chamber 1, the air inlet pipe 5 is connected to a plurality of air distribution plates 6, a row of atomizing nozzles 8 is arranged between every two air distribution plates 6, the atomizing nozzles 8 are connected to the water inlet pipe 7, a container bracket 9 is arranged inside the thermal insulation cooling chamber 1, a lower water tank 10 is arranged at the bottom of the thermal insulation cooling chamber 1, the lower water tank 10 is connected to the drain pipe 11, an exhaust pipe 13 is arranged at the lower part of the left side of the thermal insulation cooling chamber 1, a water-gas separator 12 is arranged on the exhaust pipe 13, and the rear end of the exhaust pipe 13 is connected to the exhaust pump 14.

[0028] An air intake filter for dust prevention is arranged at the front end of the air intake muffler 3 .

[0029] The air distribution plate 6 is made of stainless steel, has a structure for blowing air downward, and has a plurality of air outlets disposed on the bottom surface of the air distribution plate 6 .

[0030] The ventilation chamber includes a ventilation chamber body 21, a conveyor belt 22, a ventilation air pump 23, an air intake filter 24, a side blowing air pipe 25, a ventilation chamber nozzle 26, and an upper ventilation pipe 27. The conveyor belt 22 is arranged inside the ventilation chamber body 21, the ventilation air pump 23 is arranged on the top of the ventilation chamber body 21, the air intake filter 24 is arranged at the front end of the ventilation air pump 23, the output end of the ventilation air pump 23 is connected to the side blowing air pipe 25 and the upper ventilation pipe 27, the side blowing air pipe 25 and the upper ventilation pipe 27 are both provided with ventilation chamber nozzles 26, the side blowing air pipe 25 is arranged on the left side of the ventilation chamber body 21 and the ventilation chamber nozzle 26 on its upper part is arranged to the right.

[0031] Embodiment 2

[0032] The room temperature air mixed with atomized water is sent into the air cooling chamber for rapid cooling for 1 minute, wherein the volume ratio of ventilation volume to atomized water volume is 100:1, so that the temperature in the heat treatment chamber is rapidly cooled from 170 degrees Celsius to 80 degrees Celsius.

[0033] The ventilation room is subjected to a low wind speed of 1 m / s for 20 minutes, and the room temperature is 25 degrees Celsius, and then cooled to below 40 degrees Celsius.

[0034] The container for loading ES fibers is a porous structure.

[0035] The gradient cooling process and device for preparing ES fibers improves the need for rapid cooling after heat treatment. The existing technology directly places the fibers in water for cooling, which consumes a lot of water and has high cost. The cooling process is divided into two steps. In the first step, the high-temperature fibers are cooled using high-speed water mist and air to quickly stabilize and shape their properties and structure. Then, air cooling is used to remove excess heat, which reduces water consumption, reduces energy consumption, and improves economic benefits.

[0036] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gradient cooling process for preparing ES fibers, characterized in that: The steps include: 1) The container and the ES fiber loaded therein are taken out of the heat treatment chamber, and sent into the air cooling chamber to input room temperature air mixed with atomized water for rapid cooling for 1-2 minutes, so that the temperature is rapidly reduced from 170-180 degrees Celsius in the heat treatment chamber to 80-90 degrees Celsius; 2) After cooling to 80-90 degrees Celsius, take it out of the air-cooling room using a forklift, and then place it in a light-proof, ventilated room or equipment with low wind speed for 10-30 minutes, and cool it to below 60 degrees Celsius. In this process, the moisture adhered in step 1 is dissipated by evaporation; 3) The fibers and the container in which they are loaded are then placed in a ventilated storage room or workshop to cool naturally to room temperature.

2. The gradient cooling device for preparing ES fibers according to claim 1, characterized in that: The structure comprises an air cooling chamber and a ventilation chamber, wherein the air cooling chamber is arranged separately or on the same production line.

3. A gradient cooling device for preparing ES fibers according to claim 2, characterized in that: The air cooling chamber comprises a heat-insulating cooling chamber, a cooling chamber door, an air intake muffler, an air intake pump, an air intake pipe, an air distribution plate, a water inlet pipe, an atomizing nozzle, a container bracket, a lower water tank, a drain pipe, a water vapor separator, an exhaust pipe, and an exhaust pump. A cooling chamber door is arranged on the side of the heat-insulating cooling chamber, an air intake muffler is arranged on the top of the heat-insulating cooling chamber, the air intake muffler is connected to the air intake pump through a pipeline, the air intake pump is connected to the air intake pipe, the air intake pipe is connected to the interior of the heat-insulating cooling chamber, the air intake pipe is connected to a plurality of air distribution plates, a row of atomizing nozzles is arranged between every two air distribution plates, the atomizing nozzle is connected to the water inlet pipe, a container bracket is arranged inside the heat-insulating cooling chamber, a lower water tank is arranged at the bottom of the interior of the heat-insulating cooling chamber, the lower water tank is connected to the drain pipe, an exhaust pipe is arranged at the lower part of the left side of the heat-insulating cooling chamber, a water vapor separator is arranged on the exhaust pipe, and the rear end of the exhaust pipe is connected to the exhaust pump.

4. The gradient cooling process and device for preparing ES fiber according to claim 3, characterized in that: An air intake filter screen for preventing dust is arranged at the front end of the air intake muffler.

5. The gradient cooling process and device for preparing ES fiber according to claim 3, characterized in that: The air distribution plate is made of stainless steel, has a structure for blowing air downward, and has a plurality of air outlets arranged on the bottom surface of the air distribution plate.

6. The gradient cooling process and device for preparing ES fiber according to claim 2, characterized in that: The ventilation chamber includes a ventilation chamber body, a conveyor belt, a ventilation air pump, an air intake filter, a side blowing air pipe, a ventilation chamber nozzle, and an upper ventilation pipe. The conveyor belt is arranged inside the ventilation chamber body, the ventilation air pump is arranged on the top of the ventilation chamber body, the air intake filter is arranged at the front end of the ventilation air pump, the output end of the ventilation air pump is connected to the side blowing air pipe and the upper ventilation pipe, the side blowing air pipe and the upper ventilation pipe are both provided with ventilation chamber nozzles, the side blowing air pipe is arranged on the left side of the ventilation chamber body and the ventilation chamber nozzle on its upper part is arranged to face right.

7. The gradient cooling process and device for preparing ES fiber according to claim 1, characterized in that: The room temperature air mixed with atomized water is sent into the air cooling chamber for rapid cooling for 1 minute, wherein the volume ratio of ventilation volume to atomized water volume is 100:1, so that the temperature in the heat treatment chamber is rapidly cooled from 170 degrees Celsius to 80 degrees Celsius.

8. The gradient cooling process and device for preparing ES fiber according to claim 1, characterized in that: The ventilation room is subjected to a low wind speed of 1 m / s for 20 minutes, and the room temperature is 25 degrees Celsius, and then cooled to below 40 degrees Celsius.

9. The gradient cooling process and device for preparing ES fiber according to claim 1, characterized in that: The container for loading ES fibers is a porous structure.

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