Cotton rapid dewatering pre-conditioning equipment

Abstract

The utility model discloses a kind of cotton quick dehydration pre-conditioning equipment, belong to cotton drying equipment technical field, including the drying chamber in the body and the heat pump unit of its bottom, the cotton to be dried is placed in drying chamber, the side of drying chamber is equipped with air supply port, bottom is equipped with return air port, heat air is sent to the upper portion of drying chamber by heat pump unit to heat cotton, make cotton internal moisture vaporization, while the air extracted from the bottom of drying chamber is cooled, and the moisture in hot air is condensed and discharged through drain pipe;Utilize heat pump unit to heat air continuously input hot air in drying chamber, bottom is continuously cooled to the air discharged, further heat the air after cooling, make air form closed circulation between drying chamber and heat pump unit, realize the drying of cotton by multiple circulation.The utility model is simple and compact in structure, can improve cotton drying efficiency, reduce equipment energy consumption;While without electric heating, improve the safety factor.

Description

Technical Field

[0001] This utility model belongs to the technical field of cotton drying equipment, and specifically relates to a cotton rapid dehydration and pre-humidification equipment. Background Technology

[0002] As is well known, cotton needs to undergo impartial inspection to ensure its quality meets requirements. According to the impartial inspection requirements for cotton, batches of cotton samples with a moisture regain exceeding 6.5% require pre-conditioning to reduce the moisture regain to below 6.5%. Therefore, most cotton requires pre-conditioning before impartial inspection. Currently, traditional cotton pre-conditioning drying techniques involve placing a high-powered dehumidifier in a pre-conditioning chamber to reduce humidity and increase temperature; or installing heating equipment in the pre-conditioning chamber for drying. However, due to the large space of the pre-conditioning chamber and its low utilization rate, the limited number of equipment cycles results in low drying efficiency. Furthermore, heating equipment is generally electrically heated, posing significant safety risks. Utility Model Content

[0003] To address the above problems, this utility model provides a cotton rapid dehydration and pre-humidification device.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A rapid cotton dehydration and pre-humidification device includes a body with an internal drying chamber, which can accommodate cotton to be dried. The drying chamber has an air inlet on its side and an air return outlet at its bottom. A heat pump unit is installed at the bottom of the body. The heat pump unit is used to supply hot and humid air to the upper part of the drying chamber and to cool and dehumidify the air extracted from the bottom of the drying chamber.

[0005] Furthermore, the drying chamber has a mezzanine on both sides, and the side of the mezzanine adjacent to the drying chamber is a mesh air supply baffle. The bottom of the mezzanine has several air supply outlets, which are connected to the air supply pipes of the heat pump unit. The lower part of the drying chamber is equipped with a mesh return air baffle, and the bottom of the drying chamber is equipped with a drain pipe.

[0006] Furthermore, the air outlet is located at the end of the nozzle, and several nozzles are spaced vertically along the length of the interlayer, with each nozzle connected to an air supply pipe.

[0007] Furthermore, heat insulation layers are provided between the interlayer and the side wall of the machine body, and at the top of the drying chamber.

[0008] Furthermore, a conveying assembly is provided in the lower part of the drying chamber and above the return air baffle. The conveying assembly is used to support and convey the cotton material frame, and the material frame is provided with ventilation holes on all four sides.

[0009] Furthermore, the conveying assembly consists of a row of conveying rollers, each with a sprocket at both ends. Several sprockets are connected by a chain, and the sprockets are driven by a motor. The motor is located at the bottom of the machine body.

[0010] Furthermore, the machine body is provided with double doors that can be opened and closed at both the front and rear ends, and the middle panel of the double doors is made of transparent material; the bottom of the double doors is provided with a gap for the conveyor rollers to pass through.

[0011] Furthermore, the heat pump unit includes a compressor, a condenser, an expansion valve, and an evaporator. The compressor, condenser, expansion valve, evaporator, and compressor are connected in sequence by a medium pipe to form a closed loop, which is filled with refrigerant. The evaporator and condenser are arranged side by side, and a fan is provided below the condenser. The fan is used to draw the hot and humid air in the drying chamber downwards, cool and dehumidify it through the evaporator, and then heat it up through the condenser before discharging it to the two side layers.

[0012] Furthermore, the evaporator, condenser, and fan are arranged sequentially from top to bottom at the bottom of the drying chamber below the return air baffle, and the return air inlet at the bottom of the drying chamber is connected to the nozzle via an air supply pipe. Furthermore, the bottom of the machine body is equipped with rollers.

[0013] The technological advancements achieved by this invention compared to existing technologies are as follows: This invention features a drying chamber at the top of the machine body. The cotton to be dried is placed inside the drying chamber, and a heat pump unit supplies hot air to the top of the chamber to heat the cotton, causing the internal moisture to vaporize. Simultaneously, the humid air extracted from the bottom of the drying chamber is cooled and dehumidified, causing the moisture in the hot, humid air to condense and be discharged through a drain pipe. The heat pump unit then continuously heats the air and supplies more hot air into the drying chamber, while the air discharged from the bottom is continuously cooled and then further heated, creating a closed-loop circulation between the drying chamber and the heat pump unit. Through multiple cycles, the cotton is dried. This invention has a simple and compact structure, employs assembly line operation, improves cotton drying efficiency, and reduces equipment energy consumption. Furthermore, it eliminates the need for electric heating, increasing safety. Attached Figure Description

[0014] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0015] In the attached diagram: Figure 1 A schematic diagram of a cotton rapid dehydration and pre-humidification device provided for an embodiment of this utility model; Figure 2 for Figure 1 A schematic diagram of a partial structure inside the central body; Figure 3 This is a schematic block diagram of the heat pump unit in the embodiment of this utility model; In the picture: 1-Drying chamber; 2-Main body; 3-Ampetual layer; 4-Air supply baffle; 5-Air supply duct; 6-Return air baffle; 7-Drainage pipe; 8-Nozzle; 10-Material frame; 11-Conveying roller; 13-Double door; 14-Compressor; 15-Condenser; 16-Expansion valve; 17-Evaporator; 18-Fan; 19-Roller. Detailed Implementation

[0016] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this utility model will be described below with reference to the accompanying drawings.

[0017] like Figure 1-3 As shown in the figure, this utility model provides a cotton rapid dehydration and pre-humidification device, including a body 2 with an internal drying chamber 1. The drying chamber 1 can accommodate cotton to be dried. The drying chamber 1 has air inlets on its sides and air return outlets at its bottom. A heat pump unit is installed at the bottom of the body 2. The heat pump unit is used to supply hot air to the upper part of the drying chamber 1 and cool the air extracted from the bottom of the drying chamber 1. The drying chamber 1 has a double-layer 3 on both sides. The side of the double-layer 3 adjacent to the drying chamber 1 is a mesh-covered air return baffle 4. The bottom of the double-layer 3 has several air inlets connected to the air supply pipes 5 of the heat pump unit. A mesh-covered air return baffle 6 is installed at the bottom of the drying chamber 1, and a drain pipe 7 is installed at the bottom of the drying chamber 1. The hot air delivered by the heat pump unit enters the two side interlayers and then enters the drying chamber through the two side air supply baffles, heating the cotton in the drying chamber and causing its internal moisture to vaporize. The hot and humid air is discharged through the bottom return air baffle and cooled and dehumidified by the heat pump unit, condensing the vaporized moisture in the air before being discharged, thus achieving the drying of the cotton.

[0018] In specific embodiments of this utility model, such as Figure 2 , 3 As shown, the air outlet is located at the end of the nozzle 8, and several nozzles 8 are spaced vertically along the length of the interlayer 3, and all of the nozzles 8 are connected to the air supply pipe 5. Hot air is sprayed upward through the vertical nozzles and then enters the drying chamber through the air supply baffle, which enables the cotton in the drying chamber to fully contact the hot air, causing its internal moisture to rise and vaporize.

[0019] To further optimize the above solution, heat insulation layers are provided between the interlayer 3 and the side wall of the machine body 2, and at the top of the drying chamber 1. The heat insulation layers are made of rubber and plastic insulation cotton or vacuum panels, which can prevent heat loss.

[0020] In specific embodiments of this utility model, such as Figure 1, 2 As shown, a conveying assembly is provided at the lower part of the drying chamber 1 and above the return air baffle 6. This conveying assembly supports and conveys cotton frames 10, with ventilation holes around each frame 10. The conveying assembly consists of a row of conveying rollers 11, each with sprockets at both ends. Several sprockets are connected by chains and driven by a motor located at the bottom of the machine body 2. Multiple frames can be stacked together. The legs at the four corners of the bottom of each frame engage with the slots at the four corners of the top of the frame below. The number of stacked frames can be adjusted according to actual production needs. Stacking multiple frames fully utilizes the internal space of the drying chamber, further improving cotton drying efficiency. The conveying rollers move the frames from one end of the drying chamber to the other, achieving automatic frame transfer.

[0021] In its specific design, the machine body 2 is equipped with double doors 13 that can be opened and closed at both the front and rear ends. The middle panel of the double door 13 is made of transparent material. The bottom of the double door 13 has a gap for the conveyor roller 11 to pass through. This structure enables assembly line operation. Even when the double doors are closed, the conveyor roller can still operate normally. While ensuring sufficient contact between the cotton and hot air, the cotton can be quickly removed from the outlet after drying, reducing the waiting time for material removal.

[0022] In specific embodiments of this utility model, such as Figure 3 As shown, the heat pump unit includes a compressor 14, a condenser 15, an expansion valve 16, and an evaporator 17. The compressor 14, condenser 15, expansion valve 16, evaporator 17, and compressor 14 are sequentially connected by a medium pipe to form a closed loop, which is filled with refrigerant. The evaporator 17 and condenser 15 are arranged side-by-side, with a fan located below the condenser 15. The outlet of the fan is connected to an air supply duct 5, used to draw hot and humid air from the drying chamber 1 downwards, through the evaporator 17 for cooling and dehumidification, then through the condenser 15 for heating, before being discharged to the side chambers 3. The working process of the heat pump unit is as follows: During operation, the compressor uses a motor to drive a piston or screw to compress the refrigerant into a high-temperature, high-pressure gas. This high-temperature, high-pressure gas then heats the air discharged from the exhaust fan via a condenser. The hot air is then delivered through an air duct to the interlayer on both sides of the drying chamber. The hot air enters the drying chamber through the mesh of the air supply baffles on both sides. Passing through the cotton in the basket, the hot and humid air vaporizes the moisture inside. The humid air in the drying chamber is then pushed downwards to the bottom of the chamber, and then sequentially passes through an evaporator and a condenser. The evaporator condenses the moisture in the high-temperature, high-humidity air into water, which is discharged through a drain pipe, thus reducing the humidity of the cotton. The condenser then reheats the cooled and dehumidified air and recirculates it back into the drying chamber. At this point, the refrigerant inside the condenser dissipates heat, changing from a high-temperature, high-pressure gas to a low-temperature, high-pressure liquid. After passing through an expansion valve, the low-temperature, high-pressure liquid is throttled and depressurized, becoming a low-temperature, low-pressure liquid. After absorbing heat in the evaporator, the refrigerant inside the evaporator changes from a low-temperature, low-pressure liquid to a high-temperature, low-pressure gas, entering the next cycle.

[0023] In specific manufacturing, the evaporator 17, expansion valve 16, condenser 15 and fan 18 are integrated inside the housing, and the housing is installed at the bottom of the drying chamber 1 below the return air baffle 6; at the same time, the compressor 14 is installed at the bottom of the body 2, and the drain pipe 7 is installed at the lowest point of the bottom surface of the drying chamber 1, with the outlet of the drain pipe 7 connected to the recovery water tank; the return air inlet at the bottom of the drying chamber 1 is connected to the nozzles 8 of the two side layers through the air supply pipe 5, which can realize the circulation of air between the air supply inlet and the return air inlet of the drying chamber.

[0024] To further optimize the above solution, each of the four corners of the bottom of the machine body 2 is equipped with a roller 19, and the roller 19 is equipped with a brake. The rollers allow the equipment to be moved to any work location. After the machine body is in place, the brakes are used to secure the rollers, ensuring the machine body remains stationary. Additionally, adjustable-height support legs can be installed at the bottom of the machine body, allowing for easy adjustment of the machine body's height after placement to lift the rollers off the ground, and further adjustment of the machine body's level.

[0025] In the specific design, the selection of this utility model is as follows: The dimensions of the machine body are: 2000mm (length) * 900mm (width) * 1850mm (height); the dimensions of the material frame are: 725mm (length) * 580mm (width) * 195mm (height). The power of the exhaust fan and the exhaust fan is 2.2KW, and the power of the compressor is 1.76KW.

[0026] The cotton is loaded using a combination of five baskets, arranged in two rows at intervals, entering the drying chamber. After one row is dried, it is removed through the rear door of the machine, while the other row enters through the front door. The drying pretreatment of the cotton is achieved using upper insulation and a lower low-temperature heat pump within the drying chamber.

[0027] During operation, the supply air temperature inside the drying chamber is controlled between 45-50℃, and the return air temperature is controlled at around 35℃. Simultaneously, the internal circulating air volume of the drying chamber is 240 m³ / h, and the static pressure is 1.0 kPa. Testing shows that cotton pretreated with this equipment can achieve a moisture regain of 6.5%. The total power consumption for dehydrating 1 ton of wet cotton (12% moisture content) to 6.1% is 265 kWh; each kWh of electricity can remove 1.3 kg of water (dehumidification ratio 1:1.3 kg H₂O / kWh). This invention, used for cotton pre-treatment, stabilizes the temperature in the drying chamber at 45-50℃ and the humidity at 20%RH, completing 5 cycles per minute. Cotton dehydration time is reduced from 6 hours per batch to 10 minutes per batch, increasing efficiency by 36 times. This invention employs low-temperature heat pump bidirectional utilization technology, with a closed-loop dehydration mode that eliminates any gas emissions. There is no loss of organic components during the heating and dehydration process, achieving "moisture control, stabilization, harmlessness, and resource utilization" in cotton pre-treatment. It is also suitable for low-temperature deep dehydration of various organic materials.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A cotton rapid dehydration and pre-humidification device, characterized in that: The machine includes a body with an internal drying chamber that can hold cotton to be dried. The drying chamber has an air inlet on the side and an air return inlet at the bottom. A heat pump unit is installed at the bottom of the machine, which is used to supply hot and humid air to the upper part of the drying chamber and to cool and dehumidify the air drawn out from the bottom of the drying chamber. The drying chamber has a mezzanine on both sides. The side of the mezzanine adjacent to the drying chamber is a mesh air supply baffle. The bottom of the mezzanine has several air supply outlets, which are connected to the air supply pipes of the heat pump unit. The lower part of the drying chamber is equipped with a mesh return air baffle, and the bottom of the drying chamber is equipped with a drain pipe.

2. The cotton rapid dehydration and pre-humidification equipment according to claim 1, characterized in that: The air outlet is located at the end of the nozzle, and several nozzles are spaced vertically along the length of the interlayer, with each nozzle connected to an air supply pipe.

3. The cotton rapid dehydration and pre-humidification equipment according to claim 1, characterized in that: The interlayer is provided with heat insulation layers between the machine body sidewall and the top of the drying chamber.

4. The cotton rapid dehydration and pre-humidification equipment according to claim 1, characterized in that: A conveying assembly is provided in the lower part of the drying chamber and above the return air baffle. The conveying assembly is used to support and convey the cotton material frame. The material frame is provided with ventilation holes on all four sides.

5. The cotton rapid dehydration and pre-humidification equipment according to claim 4, characterized in that: The conveying assembly consists of a row of conveying rollers, each with a sprocket at both ends. Several sprockets are connected by a chain, and the sprockets are driven by a motor. The motor is located at the bottom of the machine body.

6. The cotton rapid dehydration and pre-humidification equipment according to claim 1, characterized in that: The machine body is equipped with double doors at both the front and rear ends, and the middle panel of the double doors is made of transparent material.

7. The cotton rapid dehydration and pre-humidification equipment according to claim 1, characterized in that: The heat pump unit includes a compressor, a condenser, an expansion valve, and an evaporator. The compressor, condenser, expansion valve, and evaporator are connected in sequence by a medium pipe to form a closed loop, and the closed loop is filled with refrigerant. The evaporator and condenser are arranged side by side, and a fan is installed below the condenser. The fan is used to draw the hot and humid air in the drying chamber downwards, cool and dehumidify it through the evaporator, heat it up through the condenser, and then discharge it to the two side layers.

8. The cotton rapid dehydration and pre-humidification equipment according to claim 7, characterized in that: The evaporator, condenser, and fan are arranged sequentially from top to bottom at the bottom of the drying chamber below the return air baffle. The return air inlet at the bottom of the drying chamber is connected to the nozzle through an air supply pipe.

9. A cotton rapid dehydration and pre-humidification device according to any one of claims 1-8, characterized in that: The bottom of the machine body is equipped with rollers.

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