Oily waste liquid treatment device for aramid fiber production

Abstract

The invention relates to the field of oil-water separators, and discloses an oil-containing waste liquid treatment device for aramid fiber production, the oil-containing waste liquid treatment device comprises a mounting box, a waste oil pool is arranged at the lower end of the mounting box, a steel belt is arranged on one side of the mounting box, and an oil removal assembly is arranged in front of the waste oil pool; the oil removal assembly mainly comprises first scrapers, sliding rods, a rotating roller, a water supply pipe and a nozzle, the first scrapers are arranged on the two sides of the steel belt, and the sliding rods are arranged on the two sides of the lower end of each first scraper. The cleaning effect can be enhanced, waste oil is prevented from flowing back to a waste liquid pool, oil blocks are prevented from entering a driving roller to interfere with running of a steel belt, fine oil blocks can be reduced, and the waste oil falling probability is further reduced; in addition, clear water is dripped on the surface of the steel strip to form thin ice, so that the steel strip can be quickly cooled by utilizing large specific heat capacity of water, and can be kept warm and slow down in temperature rise when the steel strip moves downwards.

Description

Technical Field

[0001] The invention relates to the technical field of oil-water separators, in particular to an oily waste liquid treatment device for aramid fiber production. Background Art

[0002] In the patent application with application announcement number CN107055690B, it includes a frame, a motor, a driving wheel, a driven wheel, an oil belt, a scraper and a semiconductor refrigeration device, wherein the driving wheel and the driven wheel are respectively mounted at the upper end and the lower end of the frame, and the driving wheel is connected to the motor through a driving shaft; the oil belt is sleeved on the driving wheel and the driven wheel; the scraper is mounted on the frame, located between the driving wheel and the driven wheel, and contacts the oil belt for scraping off the oil on the oil belt, and an oil guide groove is provided on the scraper;

[0008] the semiconductor refrigeration device includes a temperature controller, a heat absorbing end, a heat dissipating end and at least one connecting end to the heat absorbing end. The heat pipe has a hot end and a heat dissipation end. The heat-absorbing end includes at least one semiconductor refrigeration element, a cooling conductor, and a heat-absorbing end substrate. One side of the cooling conductor is fixed to the cold end of the semiconductor refrigeration element, and the other side is attached to the inner side of the oil belt, used to cool the oily wastewater and the oil belt. The heat-absorbing end substrate is fixed to the hot end of the semiconductor refrigeration element and fixedly connected to one end of the heat pipe. The heat dissipation end is provided with a heat dissipation end substrate, which is fixedly connected to the other end of the heat pipe and attached to a scraper for heating the scraper. A thermostat is connected to the semiconductor refrigeration element for controlling the power of the semiconductor refrigeration element. Advantages include: simultaneous utilization of the cold and heat generated by the semiconductor refrigeration system. On the one hand, the cold generated by the semiconductor refrigeration system is used to reduce the temperature of the mixed liquid, increase the viscosity of the oily substance, and facilitate the extraction of the oily substance. On the other hand, the heat generated by the semiconductor system is used to reduce the viscosity of the oily substance, facilitate the separation of the oily substance, and increase the fluidity of the oily substance.

[0003] During the production of high-performance aramid fibers, various oils and high-molecular-weight organic matter are introduced into the process of polymer precipitation, spinning oil addition, and equipment lubrication. These substances enter the process wastewater, forming an oil-water mixture with complex composition and high treatment difficulty, especially some high-viscosity, high-melting-point floating oil and saponified oil layers. The steel belt degreaser is just right for collecting floating oil in the oil separator, regulating tank, or flotation separation tank of the aramid production line. As a highly efficient physical oil skimming equipment, the steel belt oil remover has been widely used in the pretreatment of various types of oily wastewater due to its significant advantages such as high degree of automation, low operating costs, and no need to add chemical agents. Its core mechanism is to use the lipophilic properties of the annular steel belt to continuously adsorb and remove the floating oil on the liquid surface from the water body, and finally scrape it into the oil collection tank for recovery by a scraper. In the treatment of process waste liquids in polymer materials industries such as aramid production, this equipment has shown certain application potential. It is particularly suitable for further recovery of free floating oil with suitable properties from water bodies that have achieved preliminary separation of oil and water after units such as oil separators, regulating tanks or flotation tanks, which has a positive effect on reducing the load and operating costs of subsequent treatment units. In the prior art including the above-mentioned patents, although the method of lowering the surface temperature of the steel strip so that the floating oil in the waste liquid condenses on the surface of the steel strip can effectively improve the efficiency of removing the floating oil, when the steel strip with oil blocks condensed on the surface passes through the drive roller, the oil blocks are not only likely to affect the stability of the steel strip, but also easily crushed by the cooperation of the steel strip and the drive roller. At this time, the oil block residue is likely to fall back into the waste liquid pool, which will have an adverse effect on the technical solution in the above-mentioned patents to a certain extent; in addition, in the above-mentioned patents, the scraper is heated, and the melted oil is not only easy to flow back into the pool along the steel strip, but the melted oil will also increase the adhesion effect of other oil blocks, making it more difficult to peel off from the steel strip and more difficult to be quickly discharged from the scraper. Summary of the Invention

[0004] The problem to be solved by the present invention is to improve the process of steel strip degreasing, so as to improve its degreasing efficiency and enhance its working stability.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: an oil-containing waste liquid treatment device for aramid fiber production, comprising an installation box, a waste oil pool is provided at the lower end of the installation box, a steel belt is provided on one side of the installation box, and an oil removal component is provided in front of the waste oil pool. The oil removal component mainly includes a scraper 1, a slide rod, a rotating rod, a water supply pipe and a nozzle. The scraper 1 is arranged on both sides of the steel belt, slide rods are provided on both sides of the lower end of the scraper 1, a rotating rod is provided between the slide rods, the water supply pipes are arranged on both sides of the steel belt, the water supply pipes are arranged on the side where the steel belt goes downward, and nozzles are provided between the water supply pipes.

[0006] Preferably, the oil removal assembly also includes a collection tray, which is fixedly arranged on one side of the waste oil pool. The collection tray is located around the steel belt and is used to guide the scraped oil to the waste oil pool. The scraper is fixed to the upper end of the collection tray through a bracket.

[0007] Preferably, the slide rod is fixed to the bracket of scraper 1 by bolts, the slide rod is located on both sides of the steel belt, the rotating rod is slidably connected to the slide rod through a slider, and the sliders on both sides of the rotating rod are fixed with springs on one side close to the bracket, and the springs are also arranged around the slide rod.

[0008] Preferably, the rotating roller contacts the steel belt under the action of a spring, the diameter of the rotating roller is larger than the gap between the steel belt and the collecting plate, and the rotating roller can rotate with the movement of the steel belt, and the rotating roller and the scraper are symmetrically arranged along the center line of the steel belt.

[0009] Preferably, a placement rack is provided on the downward side of the steel belt, and a number of semiconductor wafers are provided inside the placement rack. The cold end of the semiconductor wafer is provided on the side close to the steel belt, and a heat conducting strip is provided on the hot end side of the semiconductor wafer. After the heat conducting strip passes through the placement rack and the collection plate, it is fixed at the lower end of the collection plate. The placement rack is also symmetrically arranged along the center line of the steel belt.

[0010] Preferably, a heat conducting plate is provided on the side of the semiconductor sheet close to the steel belt, the heat conducting plate is attached to the surface of the steel belt, and the heat conducting plate is fixedly provided on one side of the placement rack.

[0011] Preferably, the upper end of the placement rack is used to install a water supply pipe and a nozzle, the nozzle is arranged above the heat conduction plate, the water supply pipe is located on the outside of the placement rack, the nozzle is connected to the water supply pipe, and the nozzle is used to drip water in the form of water droplets. A scraper 2 is fixedly provided on the upper end of the placement rack.

[0012] Preferably, a mounting frame is provided in front of the steel belt, on a side away from the waste oil pool, a driving motor is provided inside the mounting frame, an impeller is rotatably provided at the upper end of the mounting frame, and the impeller is driven by the driving motor.

[0013] Preferably, the impeller is located below the liquid surface of the waste liquid pool, specifically below the stratification line between the floating oil and the clean water, and the impeller rotates slowly during operation.

[0014] Preferably, the oil collected in the waste oil pool enters an external oil separator for oil-water separation, and the separated water is pumped into the nozzle from the water supply pipe under the action of an external water pump.

[0015] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) The oil removal component can scrape off the oil blocks inside the steel belt after the oil blocks are removed and before the steel belt enters the drive roller, thereby adding a cleaning process: it can not only enhance the cleaning effect and prevent the waste oil from flowing back into the waste liquid pool, but also prevent the oil blocks from entering the drive roller and interfering with the operation of the steel belt, and can also reduce the generation of fine oil blocks, further reducing the probability of waste oil falling back; in addition, dripping clean water on the surface of the steel belt to form thin ice can not only use the large specific heat capacity of water to quickly cool it down, but also keep it warm when the steel belt is moving downward, slowing down the heating rate. In summary, the oil removal component can simultaneously improve work efficiency and device stability. In addition, it is worth mentioning that the water generated after the secondary separation of the extracted oil can be reused, thereby reducing resource consumption; (2) Under the action of the mounting frame and the impeller, the floating oil can be slowly pushed to move toward the steel belt. In this way, the amount of floating oil near the steel belt will be greater than that at other locations, which can further improve the working efficiency of the steel belt. In addition, the impeller rotates slowly and will not cause a large impact on the waste liquid, thereby minimizing the impact on the steel belt as much as possible, thereby improving the working efficiency while ensuring its working stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of a partial cross-sectional structure of the mounting frame and impeller of the present invention; Figure 3 It is a cross-sectional schematic diagram of some components in the device of the present invention; Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram; Figure 5 For the present invention Figure 3 The enlarged structural diagram at B in the middle; Figure 6 Schematic diagram of the oil removal component structure in the device of the present invention; Figure 7 For the present invention Figure 6 The enlarged structural diagram at C in the middle; Figure 8 This is a schematic diagram of the rear structure of the device of the present invention; Figure 9 Schematic diagram of the working state of the device of the present invention.

[0017] In the figure: 1. Installation box; 2. Waste oil tank; 3. Steel belt; 4. Oil removal assembly; 401. Collection tray; 402. Scraper 1; 403. Slide rod; 404. Rotating rod; 405. Spring; 406. Placement rack; 407. Semiconductor chip; 408. Heat conducting strip; 409. Heat conducting plate; 410. Water supply pipe; 411. Nozzle; 412. Scraper 2; 5. Installation rack; 6. Impeller. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0019] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the usual meanings understood by persons of ordinary skill in the field to which this disclosure belongs. The words “including” or “comprising” and the like used in this disclosure mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The words “connected” or “connected” and the like are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. “Up”, “down”, “left”, “right” and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0020] like Figures 1 to 9 As shown, the present invention provides an oil-containing waste liquid treatment device for aramid fiber production, including an installation box 1, a waste oil pool 2 is provided at the lower end of the installation box 1, a steel belt 3 is provided on one side of the installation box 1, and an oil removal component 4 is provided in front of the waste oil pool 2. The oil removal component 4 mainly includes a scraper 402, a slide bar 403, a rotating rod 404, a water supply pipe 410 and a nozzle 411. The scraper 402 is arranged on both sides of the steel belt 3, and slide bars 403 are provided on both sides of the lower end of the scraper 402. A rotating rod 404 is provided between the slide bars 403. The water supply pipe 410 is arranged on both sides of the steel belt 3, and the water supply pipe 410 is arranged on the downward side of the steel belt 3. The nozzle 411 is provided between the water supply pipes 410.

[0021] The oil removal assembly 4 also includes a collection tray 401, which is fixedly arranged on one side of the waste oil pool 2. The collection tray 401 is located around the steel belt 3. The collection tray 401 is used to guide the scraped oil to the waste oil pool 2. The scraper 402 is fixed to the upper end of the collection tray 401 through a bracket.

[0022] The slide rod 403 is fixed to the bracket of the scraper 402 by bolts. The slide rod 403 is located on both sides of the steel belt 3. The rotating rod 404 is slidably connected to the slide rod 403 through a slider. The sliders on both sides of the rotating rod 404 are fixed with springs 405 on one side close to the bracket. The springs 405 are also arranged around the slide rod 403.

[0023] The rotating rod 404 contacts the steel belt 3 under the action of the spring 405. The diameter of the rotating rod 404 is larger than the gap between the steel belt 3 and the collecting plate 401, and the rotating rod 404 can rotate with the movement of the steel belt 3. The rotating rod 404 and the scraper 402 are symmetrically arranged along the center line of the steel belt 3.

[0024] A placement rack 406 is provided on the downward side of the steel belt 3, and a number of semiconductor chips 407 are provided inside the placement rack 406. The cold end of the semiconductor chip 407 is provided on the side close to the steel belt 3, and a heat conducting strip 408 is provided on the hot end side of the semiconductor chip 407. After the heat conducting strip 408 passes through the placement rack 406 and the collection plate 401, it is fixedly set at the lower end of the collection plate 401. The placement rack 406 is also symmetrically arranged along the center line of the steel belt 3.

[0025] A heat conducting plate 409 is provided on one side of the semiconductor chip 407 close to the steel belt 3 . The heat conducting plate 409 is attached to the surface of the steel belt 3 and is fixedly provided on one side of the placement rack 406 .

[0026] The upper end of the placement rack 406 is used to install the water supply pipe 410 and the nozzle 411. The nozzle 411 is arranged above the heat conduction plate 409. The water supply pipe 410 is located on the outside of the placement rack 406. The nozzle 411 is connected to the water supply pipe 410. The nozzle 411 is used to drip water in the form of water droplets. A scraper 412 is fixedly provided at the upper end of the placement rack 406.

[0027] A mounting frame 5 is provided in front of the steel belt 3, on a side away from the waste oil pool 2. A driving motor is provided inside the mounting frame 5. An impeller 6 is rotatably provided on the upper end of the mounting frame 5, and the impeller 6 is driven by the driving motor.

[0028] The impeller 6 is located below the liquid surface of the waste liquid pool, specifically below the stratification line between the floating oil and the clean water. The impeller 6 rotates slowly during operation.

[0029] The oil collected in the waste oil pool 2 enters the external oil separator for oil-water separation, and the separated water is pumped into the nozzle 411 from the water supply pipe 410 under the action of the external water pump.

[0030] The working principle and use process of the present invention are as follows: when removing floating oil, the semiconductor chip 407 starts to cool, and at the same time, the external water pump is started to pump clean water from the water supply pipe 410 into the nozzle 411, so that the clean water drips onto the heat conducting plate 409 in the form of water droplets and adheres to the surface of the steel strip 3. At this time, the temperature of the heat conducting plate 409 gradually decreases under the action of the semiconductor chip 407, which can be used to reduce the temperature of the steel strip 3. The water adhering to the surface of the steel strip 3 will form a thin layer of ice on the surface of the steel strip under the action of the continuous low temperature until the steel strip 3 enters the waste liquid. After the steel belt 3 enters the waste liquid, the low temperature on its surface can solidify the floating oil on its surface. As the steel belt 3 moves upward, the scraper 402 can scrape off the oil blocks near the drive shaft. The scraped oil blocks fall naturally and are then collected by the collection tray 401. During this process, it is worth mentioning that if broken oil blocks fall near the steel belt 3, the continuous rotation of the rotating roller 404 can force them to move to the sides, reducing the probability of them falling back into the waste liquid pool. The collection tray 401 gradually heats up under the action of the heat conducting strips 408, so that the oil lumps on the surface of the collection tray 401 gradually melt and flow into the waste oil pool 2. When a certain amount of oil accumulates, it flows into the external grease trap for oil-water separation. After that, the separated water is returned through the water supply pipe 410 by the water pump and reused. It is worth noting that when the machine is just starting to operate or when the separated water is small, the purified liquid from the waste liquid pool can be used. When the device is working, if the floating oil on the surface of the liquid is relatively scarce, the impeller (6) can be turned on and rotated slowly, thereby forcing the upper layer of water and the floating oil to move toward the device.

[0031] The above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the spirit and scope of protection of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present invention.

Claims

1. A device for treating oily waste liquid for aramid fiber production, comprising a mounting box (1), characterized in that: A waste oil pool (2) is provided at the lower end of the installation box (1), a steel belt (3) is provided on one side of the installation box (1), and an oil removal component (4) is provided in front of the waste oil pool (2). The oil removal component (4) mainly includes a scraper (402), a slide bar (403), a rotating rod (404), a water supply pipe (410) and a nozzle (411). The scraper (402) is provided on both sides of the steel belt (3), and slide bars (403) are provided on both sides of the lower end of the scraper (402). A rotating rod (404) is provided between the slide bars (403). The water supply pipe (410) is provided on both sides of the steel belt (3), and the water supply pipe (410) is provided on the side of the steel belt (3) that is downward, and a nozzle (411) is provided between the water supply pipes (410).

2. The oily waste liquid treatment device for aramid fiber production according to claim 1, characterized in that: The oil removal assembly (4) further includes a collecting tray (401), which is fixedly arranged on one side of the waste oil pool (2). The collecting tray (401) is located around the steel belt (3). The collecting tray (401) is used to guide the scraped oil to the waste oil pool (2). The scraper (402) is fixed to the upper end of the collecting tray (401) through a bracket.

3. The oily waste liquid treatment device for aramid fiber production according to claim 1, characterized in that: The slide bar (403) is fixed to the bracket of the scraper (402) by bolts. The slide bar (403) is located on both sides of the steel belt (3). The rotating rod (404) is slidably connected to the slide bar (403) through a slider. The sliders on both sides of the rotating rod (404) are fixed with springs (405) on one side close to the bracket. The springs (405) are also arranged around the slide bar (403).

4. The oily waste liquid treatment device for aramid fiber production according to claim 3, characterized in that: The rotating rod (404) contacts the steel belt (3) under the action of the spring (405), the diameter of the rotating rod (404) is larger than the gap between the steel belt (3) and the collecting plate (401), and the rotating rod (404) can rotate as the steel belt (3) moves. The rotating rod (404) and the scraper (402) are symmetrically arranged along the center line of the steel belt (3).

5. The oily waste liquid treatment device for aramid fiber production according to claim 1, characterized in that: A placement rack (406) is provided on the side of the downward direction of the steel strip (3), and a plurality of semiconductor chips (407) are provided inside the placement rack (406). The cold end of the semiconductor chip (407) is provided on the side close to the steel strip (3), and a heat conducting strip (408) is provided on the hot end side of the semiconductor chip (407). After passing through the placement rack (406) and the collection tray (401), the heat conducting strip (408) is fixedly provided at the lower end of the collection tray (401). The placement rack (406) is also symmetrically provided along the center line of the steel strip (3).

6. The oily waste liquid treatment device for aramid fiber production according to claim 5, characterized in that: A heat conducting plate (409) is provided on one side of the semiconductor chip (407) close to the steel belt (3), the heat conducting plate (409) is attached to the surface of the steel belt (3), and the heat conducting plate (409) is fixedly provided on one side of the placement rack (406).

7. The oily waste liquid treatment device for aramid fiber production according to claim 5, characterized in that: The upper end of the placement rack (406) is used to install a water supply pipe (410) and a nozzle (411). The nozzle (411) is arranged above the heat conduction plate (409). The water supply pipe (410) is located outside the placement rack (406). The nozzle (411) is connected to the water supply pipe (410). The nozzle (411) is used to drip water in the form of water droplets. A second scraper (412) is fixedly provided at the upper end of the placement rack (406).

8. The oily waste liquid treatment device for aramid fiber production according to claim 1, characterized in that: A mounting frame (5) is provided in front of the steel belt (3) and on a side away from the waste oil pool (2). A driving motor is provided inside the mounting frame (5). An impeller (6) is rotatably provided at the upper end of the mounting frame (5), and the impeller (6) is driven by the driving motor.

9. The oily waste liquid treatment device for aramid fiber production according to claim 8, characterized in that: The impeller (6) is located below the liquid surface of the waste liquid pool, specifically below the stratification line between the floating oil and the clean water. The impeller (6) rotates slowly during operation.

10. The oily waste liquid treatment device for aramid fiber production according to claim 1, characterized in that: The oil collected in the waste oil pool (2) enters an external oil separator for oil-water separation, and the separated water is pumped into the nozzle (411) from the water supply pipe (410) under the action of an external water pump.

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