Ultra-high molecular weight polyethylene fiber extracting agent cleaning device

Abstract

The invention relates to an ultra-high molecular weight polyethylene fiber extraction agent cleaning device, which is used for cleaning ultra-high molecular weight polyethylene fibers with residual extraction agents after extraction, is arranged between an extraction tank and a drying box, and comprises a silk passing channel extending from the extraction tank to a silk inlet of the drying box; the middle of the silk passing channel is bent downwards and back, a cleaning tank containing a cleaning agent is formed in the bent position, the cleaning tank is connected with an oscillator, and an extracting agent in the ultra-high molecular weight polyethylene fibers entering the cleaning tank in the silk passing channel is separated from the ultra-high molecular weight polyethylene fibers and settles at the bottom of the cleaning tank. When the extracting agent is tetrachloroethylene, the cleaning agent is water or plasma liquid. According to the method, the extracted ultra-high molecular weight polyethylene fiber containing the extraction agent is washed in the cleaning agent, and all or most of the extraction agent is removed.

Description

Technical Field

[0001] The invention relates to the field of ultra-high molecular weight polyethylene fiber production equipment, in particular to an ultra-high molecular weight polyethylene fiber extractant cleaning device. Background Art

[0002] The process after extraction in the production of ultra-high molecular weight polyethylene fiber is drying. After extraction, the fiber will inevitably adhere to the corresponding extractant. The commonly used extractant is hydrocarbon. After Jiangsu Jiujiujiu Technology Co., Ltd. successfully broke through the difficulty of using tetrachloroethylene, tetrachloroethylene became one of the important extractants. Drying is to subject the fiber to the corresponding tension during the continuous passage of the box with set temperature, so that the extractant brought out of the fiber is fully volatilized.

[0003] The drying box is a device with inlet and outlet ports at both ends for drying the extractant on the fiber surface. Due to the continuity of fiber production, the interior of the drying box is not isolated from the surrounding environment.

[0004] Based on the above reasons, the extractant adhered to the fiber will inevitably escape into the surrounding air after passing through the drying oven. The use of hydrocarbons has great safety hazards; the use of tetrachloroethylene has great environmental hazards. The solution is usually to open the top or side of the drying oven, install an air induced device, manually control the airflow direction of the wire mouth and the wire inlet, ensure that the external gas flows into the equipment continuously, and then collect the excess gas for unified treatment. This method solves the problem to a certain extent, but there is also the problem of high energy consumption. The continuous introduction of fresh air will greatly reduce the temperature inside the equipment, and a higher heating power is required to meet the energy needs of volatilizing all the extractants. At the same time, there is also the problem that once the fan fails, the temperature of the drying oven will inevitably fluctuate violently, and the exhaust gas will diffuse into the surrounding air in large quantities, with very serious consequences. Therefore, in order to ensure that there is no problem at all, a spare fan must be added. Third, the installation of the induced draft device is very difficult, because in order to meet the uniformity of the temperature field inside the drying oven, the air flow temperature, flow rate and direction of the air flow are not allowed to fluctuate greatly, and the induced draft fan will inevitably lead to uneven temperature field and volatility of air flow. Fourth, the excess gas that is processed uniformly contains a high level of extractant and cannot be discharged directly. It needs to pass through a series of treatment devices such as absorption towers, heat exchangers, and adsorption devices before it can be discharged. For details, see CN201910719836.X. Summary of the invention

[0005] In order to solve the above problems, the inventors designed a cleaning device so that the silk entering the drying box does not contain the extractant. The cleaning device also seals the extraction tank, thereby achieving the effect of solving the above problems.

[0006] An ultra-high molecular weight polyethylene fiber extractant cleaning device is used to clean ultra-high molecular weight polyethylene fibers with residual extractant after extraction. The cleaning device is arranged between an extraction tank and a drying box, and includes a wire-feeding channel extending from the extraction tank to the wire inlet of the drying box; the middle part of the wire-feeding channel is bent downward and bent back, and a cleaning tank containing a cleaning agent is formed at the bend, and the cleaning tank is connected to an oscillator. The extractant in the ultra-high molecular weight polyethylene fiber entering the cleaning tank in the wire-feeding channel is separated from the ultra-high molecular weight polyethylene fiber and precipitated at the bottom of the cleaning tank. When the extractant is tetrachloroethylene, the cleaning agent is water or plasma liquid.

[0007] The ultra-high molecular weight polyethylene fiber extractant cleaning device is further designed to include a trough body with an upper side opening extending from the extraction tank to the drying box, the trough bottom middle part of the trough body is open, and the cleaning tank is fixedly docked at the opening; the upper edge of the trough body is buckled with a cover plate; the cover plate is connected to a partition corresponding to the cleaning tank, and the two sides of the partition are fitted with the vertical groove walls of the trough body and inserted into the cleaning tank and immersed under the cleaning agent surface of the cleaning tank; a wire running channel with bends and return bends is formed at the partition from one end to the other end of the trough body.

[0008] The ultra-high molecular weight polyethylene fiber extractant cleaning device is further designed in that each bending position in the wire feeding channel is provided with a wire guide roller.

[0009] The ultra-high molecular weight polyethylene fiber extractant cleaning device is further designed in that a liquid outlet is provided at the bottom of the cleaning tank.

[0010] The ultra-high molecular weight polyethylene fiber extractant cleaning device is further designed in that the oscillator is an ultrasonic oscillator and is arranged on the vertical side wall of the cleaning tank.

[0011] The ultra-high molecular weight polyethylene fiber extractant cleaning device is further designed in that the cleaning tank is provided with a cleaning agent replenishing port for adding cleaning agent into the interior.

[0012] The beneficial effects of the present invention are as follows: the present invention washes the ultra-high molecular weight polyethylene fiber containing the extractant after extraction in a cleaning agent to remove all or most of the extractant, thereby greatly reducing the cost of tail gas treatment; all or most of the extractant is directly collected in layers in a cleaning tank and directly recycled; and the cleaning agent forms a liquid sealing effect to avoid heat loss and pollutant diffusion caused by overflow of hot air in the drying box. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0014] Figure 2 It is a side structural schematic diagram of an embodiment. DETAILED DESCRIPTION

[0015] The present invention is further described below with reference to the accompanying drawings and embodiments: An ultra-high molecular weight polyethylene fiber extractant cleaning device is used to clean ultra-high molecular weight polyethylene fibers with residual extractant after extraction. The cleaning device is arranged between an extraction tank and a drying box, and includes a wire-feeding channel extending from the extraction tank to the wire inlet of the drying box; the middle part of the wire-feeding channel is bent downward and bent back, and a cleaning tank containing a cleaning agent is formed at the bend, and an oscillator is connected to the cleaning tank. The extractant in the ultra-high molecular weight polyethylene fiber entering the cleaning tank in the wire-feeding channel is separated from the ultra-high molecular weight polyethylene fiber and precipitated at the bottom of the cleaning tank. When the extractant is tetrachloroethylene, the cleaning agent is water or plasma liquid.

[0016] When applied, the present invention can be used alone, with one end of the wire feeding channel connected to the wire outlet side of the extraction tank and the other end connected to the wire inlet of the drying box; or multiple wire feeding channels can be connected in series and then connected to the extraction tank and the drying box.

[0017] With tetrachloroethylene as the extractant, the extracted ultra-high molecular weight polyethylene fiber containing tetrachloroethylene is discharged from the extraction tank, and then enters the cleaning tank through one end of the wire feeding channel. Water is injected into the cleaning tank. Water and tetrachloroethylene are immiscible. Under the vibration of the oscillator, the tetrachloroethylene molecules are separated from the ultra-high molecular weight polyethylene fibers, and because the density of tetrachloroethylene is greater than that of water, it is deposited at the bottom of the cleaning tank. At the same time, the liquid level in the cleaning tank rises accordingly. The liquid level is manually or automatically detected. When the liquid level reaches a certain height, it means that a lot of tetrachloroethylene has been deposited at the bottom of the cleaning tank. Tetrachloroethylene is discharged or extracted from the bottom of the cleaning tank, and the water will gradually decrease during the cleaning process. When the water depth is insufficient, water is added to the cleaning tank manually or automatically.

[0018] Specifically, Figure 1 The ultra-high molecular weight polyethylene fiber extractant cleaning device shown in the figure comprises a trough body 1 with an upper side opening extending from an extraction tank to a drying box, the trough bottom middle part of the trough body is open, and a cleaning trough is fixedly docked at the opening; a cover plate 2 is buckled on the upper edge of the trough body; a partition plate 6 corresponding to the cleaning trough is connected to the cover plate, and both sides of the partition plate are fitted with the vertical trough walls of the trough body and inserted into the cleaning trough and submerged below the water surface of the cleaning trough; a wire-feeding channel with a bend is formed at the partition plate from one end of the trough body to the other end, and a cleaning trough 3 is provided in the wire-feeding channel.

[0019] Each bending position in the wire feeding channel is provided with a guide roller 4 for changing the direction of the ultra-high molecular weight polyethylene fiber.

[0020] The bottom of the cleaning tank 3 is provided with a liquid outlet 31. The liquid outlet 31 can be connected to a valve or an automatic phase separation device to allow the washed tetrachloroethylene to return to the extraction tank.

[0021] The oscillator 5 is an ultrasonic oscillator, and may also be a general mechanical vibration oscillator, and is disposed on the vertical side wall of the cleaning tank.

[0022] The cleaning tank 3 is provided with a water inlet 32 ​​for filling water therein. The vertical side wall of the cleaning tank may be provided with an observation window made of a transparent material.

[0023] The present invention washes the ultra-high molecular weight polyethylene fiber containing the extractant after extraction in a cleaning agent to remove all or most of the extractant, thereby greatly reducing the cost of tail gas treatment; all or most of the extractant is directly collected in layers in a cleaning tank and directly recycled; and the cleaning agent forms a liquid sealing effect to avoid heat loss and pollutant diffusion caused by overflow of hot air in the drying box.

Claims

1. An ultra-high molecular weight polyethylene fiber extractant cleaning device, used for cleaning ultra-high molecular weight polyethylene fibers with residual extractant after extraction, the cleaning device is characterized in that the cleaning device is arranged between an extraction tank and a drying box, and includes a wire feeding channel extending from the extraction tank to a wire inlet of the drying box; the middle part of the wire feeding channel is bent downward and bent back, and a cleaning tank containing a cleaning agent is formed at the bending part, and the cleaning tank is connected to an oscillator, and the extractant in the ultra-high molecular weight polyethylene fiber entering the cleaning tank in the wire feeding channel is separated from the ultra-high molecular weight polyethylene fiber and precipitated at the bottom of the cleaning tank.

2. The ultra-high molecular weight polyethylene fiber extractant cleaning device according to claim 1, characterized in that: The invention comprises a trough body with an opening on the upper side extending from the extraction trough to the drying box, the trough bottom of the trough body is opened in the middle, and the cleaning trough is fixedly connected to the opening; a cover plate is buckled on the upper edge of the trough body; a partition corresponding to the cleaning trough is connected to the cover plate, and the two sides of the partition plate are fitted with the vertical trough walls of the trough body and inserted into the cleaning trough and immersed under the cleaning agent surface of the cleaning trough; a wire running channel with bends and return bends is formed at the partition plate from one end to the other end of the trough body.

3. The ultra-high molecular weight polyethylene fiber extractant cleaning device according to claim 2, characterized in that: Each bending position in the wire feeding channel is provided with a wire guide roller.

4. The ultra-high molecular weight polyethylene fiber extractant cleaning device according to claim 2, characterized in that: A liquid outlet is arranged at the bottom of the cleaning tank.

5. The ultra-high molecular weight polyethylene fiber extractant cleaning device according to claim 2, characterized in that: The oscillator is an ultrasonic oscillator and is arranged on the vertical side wall of the cleaning tank.

6. The ultra-high molecular weight polyethylene fiber extractant cleaning device according to claim 2, characterized in that: The cleaning tank is provided with a cleaning agent replenishing port for adding cleaning agent into the interior.

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