A harmless treatment device for sewage in fiber production

Abstract

The present application relates to sewage treatment technical field, the present application provides a kind of harmless treatment device of sewage for fiber production, for processing liquid in fiber filament washing tank, including crystallizing tank setting in washing tank side, crystallizing tank is communicated with washing tank, to enable the liquid in washing tank can enter crystallizing tank, crystallizing tank has PH regulator adding port;Refrigerant liquid inlet pipe is set in crystallizing tank, one end of refrigerant liquid inlet pipe is located outside crystallizing tank, the other end is located in crystallizing tank;Refrigerant liquid outlet pipe sleeve is set on refrigerant liquid inlet pipe, and the inner wall of refrigerant liquid outlet pipe and the outer wall of refrigerant liquid inlet pipe have liquid outlet gap, one end of refrigerant liquid outlet pipe is located outside crystallizing tank, and refrigerant liquid outlet pipe is configured, one end of refrigerant liquid outlet pipe located in crystallizing tank and one end of refrigerant liquid inlet pipe located in crystallizing tank are interconnected.By the above technical scheme, the technical problem that the liquid in the tank body is slowly cooled by the heat exchange medium in the tank body interlayer in the prior art is solved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of wastewater treatment technology, specifically to a device for harmless treatment of wastewater used in fiber production. Background Technology

[0002] During the production process, the fiber filaments need to be washed in a water washing tank. After the fiber filaments are washed, the water in the washing tank will be alkaline or acidic. According to environmental protection requirements, the water in the washing tank needs to be adjusted to neutral before being discharged.

[0003] In existing technologies, water from the washing tank is typically introduced into a pH adjusting tank. A pH adjusting agent is added to the tank to neutralize the liquid. The liquid is then cooled using the jacket of the pH adjusting tank, causing salts in the liquid to precipitate as crystals. These crystals are then filtered out using a filter. However, in practical applications, this jacketed cooling method is slow and inefficient. Furthermore, some fiber filaments may detach from the filter in the washing tank, easily clogging it. Summary of the Invention

[0004] To overcome the above-mentioned defects, the present invention provides a wastewater harmless treatment device for fiber production, which solves the technical problem of slow cooling of the liquid inside the tank by relying on the heat exchange medium introduced through the tank jacket in the prior art.

[0005] For example, at least one embodiment of the present invention provides a wastewater harmless treatment device for fiber production, used to treat liquid in a fiber washing tank, comprising:

[0006] A crystallization tank is disposed on one side of the washing tank and is connected to the washing tank so that the liquid in the washing tank can enter the crystallization tank. The crystallization tank has a pH adjusting agent inlet.

[0007] A refrigerant inlet pipe is installed on the crystallizer. The refrigerant inlet pipe is a hollow pipe, with one end located outside the crystallizer and the other end located inside the crystallizer.

[0008] A refrigerant outlet pipe is sleeved outside the refrigerant inlet pipe. There is an outlet gap between the inner wall of the refrigerant outlet pipe and the outer wall of the refrigerant inlet pipe. One end of the refrigerant outlet pipe is located outside the crystallization tank. The refrigerant outlet pipe is configured such that the refrigerant inlet pipe passes through the side wall of the refrigerant outlet pipe and communicates with the end of the refrigerant outlet pipe located in the crystallization tank.

[0009] For example, in a wastewater harmless treatment device for fiber production provided by at least one embodiment of the present invention, the refrigerant inlet pipe has a straight pipe section, a connecting section and a spiral section connected in sequence, the refrigerant outlet pipe is sleeved on the outside of the straight pipe section, the connecting section penetrates the side wall of the refrigerant outlet pipe and communicates with the spiral section, and the end of the spiral section away from the connecting section is connected to the end of the refrigerant outlet pipe located in the crystallization tank.

[0010] For example, in a wastewater treatment device for fiber production provided in at least one embodiment of the present invention, the crystallization tank has a drain outlet at the bottom and further includes:

[0011] A crystallized salt filter plate is installed inside the crystallization tank. The crystallized salt filter plate is located between the refrigerant outlet pipe and the drain outlet. The crystallized salt filter plate is used to filter the crystallized salt.

[0012] For example, in at least one embodiment of the present invention, a wastewater treatment device for fiber production is provided, which further includes:

[0013] A transmission pipe is rotatably mounted on the crystallizing tank, and the transmission pipe is fixedly sleeved on the refrigerant outlet pipe;

[0014] A first rotation drive is disposed on the crystallization tank. The first rotation drive is used to drive the transmission pipe to rotate, so that the transmission pipe can drive the refrigerant outlet pipe to rotate.

[0015] Several stirring blades are provided, all of which are installed on the refrigerant outlet pipe. The stirring blades are used to stir the liquid in the crystallization tank.

[0016] For example, in a wastewater harmless treatment device for fiber production provided by at least one embodiment of the present invention, the height of the end of the refrigerant inlet pipe connected to the outside is greater than the height of the end of the refrigerant outlet pipe located outside the crystallization tank, and further includes:

[0017] A liquid receiving tank is provided on the refrigerant outlet pipe, with the liquid receiving tank located near the top of the refrigerant outlet pipe so that liquid in the refrigerant outlet pipe can fall into the liquid receiving tank.

[0018] For example, in a wastewater harmless treatment device for fiber production provided in at least one embodiment of the present invention, a wastewater pretreatment device is further connected between the washing tank and the crystallization tank. The wastewater pretreatment device is located at the outlet of the washing tank and is used to filter fibers and solid impurities in the liquid flowing out of the outlet. A gate valve is provided between the wastewater pretreatment device and the washing tank, and the gate valve is used to open or close the outlet.

[0019] For example, in a wastewater treatment device for fiber production provided in at least one embodiment of the present invention, the wastewater pretreatment device includes:

[0020] A filter tank is disposed at the bottom of the washing tank. The filter tank is located at the bottom of the water outlet. The slide valve is located between the filter tank and the water outlet. The side wall of the filter tank near the bottom has several filter holes, and a solid filter plate is disposed at the filter holes.

[0021] A conical block is disposed at the bottom of the filter tank, and the conical block is used to guide the liquid in the filter tank to the filter holes.

[0022] For example, in a wastewater treatment device for fiber production provided in at least one embodiment of the present invention, the wastewater pretreatment device further includes:

[0023] A rotating rod is rotatably mounted inside the filter tank;

[0024] Several extension rods are provided, all of which are mounted on the rotating rod. The axis of each extension rod extends radially toward the inner wall of the filter tank along the rotating rod. Each extension rod is located above the conical block. Several hooks are provided on each extension rod for hooking the fibers inside the filter tank.

[0025] For example, in at least one embodiment of the present invention, a wastewater treatment device for fiber production is provided, which further includes:

[0026] A blocking sleeve is disposed at the bottom of the filter tank and is fitted over the outside of the filter tank. There is a passage space between the inner wall of the blocking sleeve and the outer wall of the filter tank. The blocking sleeve is used to prevent splashing outward through the filter holes.

[0027] A transition box is located below the blocking sleeve. The transition box is used to receive the liquid falling through the space. The transition box is connected to the crystallization tank.

[0028] The second rotation drive is disposed at the bottom of the filter tank, and the drive end of the second rotation drive passes through the bottom of the filter tank and the conical block in sequence and is connected to the rotation rod for transmission.

[0029] For example, in a wastewater harmless treatment device for fiber production provided by at least one embodiment of the present invention, a plurality of hooks are respectively located on the upper and lower sides of the side wall of the extension rod, and the openings of the hooks all face the same direction.

[0030] The beneficial effects of the embodiments of the present invention are as follows:

[0031] In this invention, the refrigerant inlet pipe is responsible for introducing the refrigerant generated by the refrigeration equipment into the crystallization tank, so that the refrigerant and the liquid in the crystallization tank can directly contact each other for heat exchange, thereby rapidly reducing the liquid temperature and accelerating the salt crystallization process. This solves the problem of slow cooling caused by relying on the heat exchange medium to be introduced through the tank jacket in the prior art.

[0032] The refrigerant inlet pipe connects to the refrigerant outlet pipe, enabling refrigerant recycling and reducing the procurement cost of refrigerant as a consumable. This is suitable for situations where the refrigerant is expensive. The refrigerant outlet pipe is fitted onto the refrigerant inlet pipe, discharging refrigerant through the outlet gap between the two pipes. Only the connection between the refrigerant outlet pipe and the crystallizer needs to be sealed. Compared to situations where the refrigerant outlet and inlet pipes are independent, this reduces the number of seals required and lowers production costs. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of the present invention and these drawings without any creative effort.

[0034] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the refrigerant inlet pipe and refrigerant outlet pipe of the present invention;

[0036] Figure 3 This is a top view of the refrigerant inlet pipe and refrigerant outlet pipe of the present invention;

[0037] Figure 4 for Figure 3 Schematic diagram of the sectional structure of the middle AA section;

[0038] Figure 5 This is a schematic diagram of the structure of the crystallizer of the present invention after the hidden part of the structure is shown.

[0039] Figure 6 This is a top view of the present invention;

[0040] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of the middle BB;

[0041] Figure 8 for Figure 7 Enlarged structural diagram at point C;

[0042] Figure 9 This is a schematic diagram of the rotating rod and the extension rod structure;

[0043] Figure 10 This is a side view of the present invention;

[0044] In the diagram: 100, crystallization tank; 200, water washing tank; 110, pH adjuster inlet; 310, refrigerant inlet pipe; 320, refrigerant outlet pipe; 321, outlet gap; 311, straight pipe section; 312, connecting section; 313, spiral section; 120, drain outlet; 130, crystallized salt filter plate; 330, transmission pipe; 340, first rotation drive component; 350, stirring blade; 360, receiving tank; 400, wastewater pretreatment device; 210, outlet; 220, slide gate valve; 410, filter tank; 420, filter hole; 430, conical block; 440, solid filter plate; 450, rotating rod; 451, extension rod; 452, hook; 460, blocking sleeve; 461, passage space; 470, transition box; 480, second rotation drive component. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it.

[0046] To keep the drawings concise, each drawing only schematically shows the parts relevant to the invention; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0047] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0050] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0051] like Figures 1-10 The diagram illustrates a wastewater treatment device for fiber production according to an embodiment of the present invention. This device treats liquid within a fiber washing tank 200 and includes a crystallization tank 100, a refrigerant inlet pipe 310, and a refrigerant outlet pipe 320. The crystallization tank 100 is cylindrical in shape. A pH adjuster inlet 110 with a sealing cap is located at the top of the crystallization tank 100 to prevent impurities from entering. A pipe interface communicating with the washing tank 200 is located on the side of the crystallization tank 100, near the bottom, and a valve is installed at the interface to allow liquid to flow into the washing tank 200. One end of the refrigerant inlet pipe 310 is located outside the crystallization tank 100 and can be connected to the refrigerant outlet pipe of a refrigeration device; the other end extends into the crystallization tank 100 near the bottom. Multiple branch pipes can be provided within the portion of the refrigerant inlet pipe 310 inside the crystallization tank 100 to allow the refrigerant to enter the liquid evenly within the crystallization tank 100, enhancing heat exchange. The connection between the refrigerant inlet pipe 310 and the crystallizer 100 is sealed to prevent liquid leakage.

[0052] A refrigerant outlet pipe 320 is fitted onto the refrigerant inlet pipe 310, forming an outlet gap 321 between its inner wall and the outer wall of the refrigerant inlet pipe 310. The outer diameter of the refrigerant outlet pipe 320 is determined based on the size of the refrigerant inlet pipe 310 and the required outlet flow rate, and is generally 20-50 mm larger than the outer diameter of the refrigerant inlet pipe 310 to ensure sufficient outlet gap 321. One end of the refrigerant outlet pipe 320 is located outside the crystallizer 100 and connects to the subsequent refrigerant circulation device. The end of the refrigerant outlet pipe 320 inside the crystallizer 100 is interconnected with the end of the refrigerant inlet pipe 310 inside the crystallizer 100, ensuring that the refrigerant can flow out smoothly after heat exchange. The portion of the refrigerant outlet pipe 320 inside the crystallizer 100 is fitted onto the main section of the refrigerant inlet pipe 310, while the branch sections of the refrigerant inlet pipe 310 are connected to the refrigerant outlet pipe 320 via high-temperature resistant hoses.

[0053] Working principle: Open the valve on the pipe connecting the crystallization tank 100 and the washing tank 200 to allow liquid in the washing tank 200 to flow into the crystallization tank 100. When the liquid level in the crystallization tank 100 reaches a certain level (generally about 2 / 3 of the tank height), close the valve. Add an appropriate amount of pH adjuster to the crystallization tank 100 through the pH adjuster inlet 110 to adjust the pH value of the liquid to neutral. During the adjustment process, the pH value of the liquid can be monitored in real time by a pH detection probe installed inside the crystallization tank 100, and the amount of adjuster added can be adjusted according to the detection results. Start the refrigeration equipment, and the refrigerant enters the crystallization tank 100 through the refrigerant inlet pipe 310. After the refrigerant exchanges heat with the liquid inside the crystallizer 100 through the wall of the refrigerant inlet pipe 310, it flows to the refrigerant outlet pipe 320 and exits through the outlet gap 321 between the refrigerant outlet pipe 320 and the refrigerant inlet pipe 310. It is then discharged from the end of the refrigerant outlet pipe 320 located outside the crystallizer 100 and returns to the refrigeration equipment for cyclic refrigeration.

[0054] The refrigerant inlet pipe 310 is responsible for introducing the refrigerant generated by the refrigeration equipment into the crystallization tank 100, so that the refrigerant can directly contact the liquid in the crystallization tank 100 for heat exchange, thereby rapidly reducing the liquid temperature and accelerating the salt crystallization process. This solves the problem of slow cooling caused by relying on the heat exchange medium to be introduced through the tank jacket in the existing technology.

[0055] The refrigerant inlet pipe 310, connected to the refrigerant outlet pipe 320, enables refrigerant recycling, reducing the procurement cost of refrigerant as a consumable and making it suitable for situations where refrigerant is expensive. The refrigerant outlet pipe 320 is fitted onto the refrigerant inlet pipe 310, discharging refrigerant through the outlet gap 321 between them. Only the connection between the refrigerant outlet pipe 320 and the crystallizer 100 needs to be sealed. Compared to situations where the refrigerant outlet pipe 320 and the refrigerant inlet pipe 310 are independent, this reduces the number of sealing ports, lowering production and maintenance costs.

[0056] In some examples, the refrigerant inlet pipe 310 has a straight pipe section 311, a connecting section 312, and a spiral section 313 connected in sequence. The refrigerant outlet pipe 320 is sleeved on the outside of the straight pipe section 311. The straight pipe section 311 is made of a material with poor thermal conductivity to reduce heat exchange between the refrigerant inside the straight pipe section 311 and the refrigerant flowing back into the outlet space. The connecting section 312 extends from the inside of the refrigerant outlet pipe 320 into the inside of the crystallizing tank 100. The connecting section 312 is a bent section, which can change the vertically downward straight pipe section 311 to a parallel direction. The part where the connecting section 312 exits from the refrigerant outlet pipe 320 is sealed with adhesive.

[0057] The connecting end extends from inside the refrigerant outlet pipe 320 and connects to the spiral section 313. The spiral section 313 is made of a material with good thermal conductivity. A flexible hose can be used to connect the spiral section 313 to the connecting section 312, facilitating the transition from the connecting section 312 to the spiral section 313. The end of the spiral section 313 furthest from the connecting section 312 connects to the end of the refrigerant outlet pipe 320 located inside the crystallization tank 100. The connection is sealed to ensure smooth refrigerant flow into the refrigerant outlet pipe 320. The spiral section 313 significantly increases the contact area and contact time between the refrigerant inlet pipe 310 and the liquid inside the crystallization tank 100, allowing the refrigerant to absorb heat from the liquid more fully, accelerating liquid cooling, and thus improving salt crystallization efficiency.

[0058] The liquid outlet tank uses support bars to support the spiral section 313. The two ends of the support bars are welded to the outer wall of the liquid outlet tank and the outer wall of the spiral section 313, respectively.

[0059] In some examples, the crystallization tank 100 has a drain outlet 120 at its bottom and also includes a crystallization filter plate with a large number of filter holes 420 evenly distributed on the filter plate. The shape of the filter holes 420 can be circular, square, or polygonal; considering the processing technology and filtration effect, circular holes are generally chosen. The hole size is selected according to the size of the target crystallized salt particles, usually between 0.1-0.5 mm, which can effectively intercept the crystallized salt while ensuring smooth liquid passage. The size of the target crystallized salt particles is determined by the crystallization rate; generally, the faster the crystallization rate, the smaller the crystallized salt particles. The hole size of the filter holes 420 on the crystallization salt filter plate 130 is determined according to the rate of temperature change inside the crystallization tank 100.

[0060] The crystallizing salt filter plate 130 plays a crucial role in solid-liquid separation within the crystallization tank 100. As the liquid and crystallized salt mixture flows downwards after cooling and crystallization, the filter plate effectively intercepts the crystallized salt particles, allowing the liquid to continue flowing downwards through the filter holes 420 and ultimately drain out through the drain outlet 120. After one crystallization cycle, the crystallizer can be opened to clean the crystallized salt on the crystallizing salt filter plate 130.

[0061] In some examples, the system also includes a transmission sleeve, a first rotary drive component 340, and a stirring blade 350. The first rotary drive component 340 is a geared motor, and its drive shaft is not collinear with the refrigerant outlet pipe 320. The first rotary drive component 340 transmits power to the transmission pipe via gear meshing or friction transmission. The transmission pipe can be configured to engage with the drive shaft of the first rotary drive component 340 via gears or friction transmission wheels. The transmission pipe is sleeved on the refrigerant outlet pipe 320 and can be fixedly connected to it using an interference fit or welding. The transmission pipe is located outside the crystallizer 100, and the portion where the refrigerant outlet pipe 320 connects to the top of the crystallizer 100 uses a rotary seal.

[0062] Multiple stirring blades 350 are installed on the outer wall of the portion of the refrigerant outlet pipe 320 located inside the crystallization tank 100. Each stirring blade 350 is arc-shaped or paddle-shaped to improve stirring efficiency. The blades are fixed to the refrigerant outlet pipe 320 by welding or bolting, and the connection points are reinforced to ensure that the blades will not fall off during high-speed rotation. When the refrigerant outlet pipe 320 rotates, the stirring blades 350 agitate the liquid inside the crystallization tank 100. On the one hand, stirring allows the added pH adjuster to be rapidly and evenly distributed in the liquid, accelerating the speed and accuracy of pH adjustment; on the other hand, during the cooling crystallization process, stirring helps to break the temperature gradient in the liquid, making the heat exchange between the refrigerant and the liquid more uniform, accelerating salt crystallization and improving crystallization efficiency.

[0063] The transmission sleeve drives the refrigerant outlet pipe 320 to rotate, which also drives the refrigerant inlet pipe 310 to rotate, making the heat exchange between the refrigerant in the spiral section 313 and the liquid in the crystallizer 100 more uniform.

[0064] In some examples, the height of the end of the refrigerant inlet pipe 310 connected to the outside is greater than the height of the end of the refrigerant outlet pipe 320 located outside the crystallizer 100. This height difference between the refrigerant inlet pipe 310 and the refrigerant outlet pipe 320 not only facilitates the connection between the refrigerant inlet pipe 310 and the external pipeline, but also allows liquid in the outlet channel to overflow outwards after exceeding the height of the outlet tank without entering the refrigerant inlet pipe 310. This also allows operators to purge the refrigerant from both the refrigerant inlet pipe 310 and the refrigerant outlet pipe 320 by introducing high-pressure gas into the refrigerant inlet pipe 310. A receiving trough 360 is also included. The receiving trough 360 is generally rectangular or semi-circular and is tightly fixed to the refrigerant outlet pipe 320 near the top by welding or special clamps, ensuring a secure connection without affecting the normal flow of refrigerant within the refrigerant outlet pipe 320. To facilitate refrigerant collection and discharge, the bottom of the liquid receiving tank is inclined at an angle, generally between 5° and 10°, and a drain port is provided at the lowest point. The drain port can be connected to a hose or pipe to guide the collected liquid to a designated location for treatment, which facilitates the recycling of refrigerant.

[0065] In some examples, a wastewater pretreatment device 400 is also connected between the washing tank 200 and the crystallization tank 100. The wastewater pretreatment device 400 is located at the outlet 210 of the washing tank 200. It effectively removes fibers and solid impurities from the wastewater discharged from the washing tank 200, reducing the turbidity and impurity content of the wastewater, and providing relatively clean liquid raw materials for the subsequent treatment process in the crystallization tank 100. This not only helps improve the efficiency and quality of the crystallization process but also extends the service life of components such as pipes and filter plates inside the crystallization tank 100, reducing equipment maintenance costs. The slide gate valve 220 mainly consists of a valve body, valve plate, drive mechanism, and seals. The valve body is made of stainless steel and is tightly connected to the outlet 210 of the washing tank 200 and the inlet of the wastewater pretreatment device 400, ensuring the sealing and stability of the connection.

[0066] During normal use of the washing tank 200, the slide valve 220 is in the closed state. When it is necessary to replace the water in the washing tank 200, opening the slide valve 220 allows the water in the washing tank 200 to flow out from the outlet 210, pass through the sewage pretreatment device 400, and then enter the crystallization tank 100 for crystallization treatment.

[0067] In some examples, the wastewater pretreatment device 400 includes a filter tank 410 and a conical block 430. The filter tank 410 is generally rectangular or cylindrical in shape and is tightly disposed at the bottom of the washing tank 200. The outlet 210 is located directly above the filter tank 410. A gate valve 220 is installed between the filter tank 410 and the outlet 210, allowing water in the washing tank 200 to flow into the filter tank 410 when the gate valve 220 is opened. Several filter holes 420 are evenly distributed on the side wall near the bottom of the filter tank 410. The filter holes 420 are circular or square in shape. A solid filter plate 440 is installed at each filter hole 420. The solid filter plate 440 is made of stainless steel mesh or high-strength filter cloth and is tightly fixed to the filter hole 420 position by a slot or glue, ensuring that the filter plate is firmly installed and not easily detached.

[0068] The filter tank 410 provides physical space for the initial filtration of wastewater. After flowing out of the outlet 210 of the washing tank 200, the wastewater enters the filter tank 410. Under the action of gravity, the fibers and solid impurities in the wastewater are intercepted by the solid filter plate 440, while the liquid flows out through the filter holes 420, achieving preliminary solid-liquid separation. This effectively reduces the impurity content entering subsequent treatment processes and lightens the processing burden on subsequent equipment. The conical block 430 is located at the center of the bottom of the filter tank 410. Its shape is conical, and the cone angle is determined according to the size of the filter tank 410 and the liquid flow requirements. The diameter of the bottom surface of the cone is adapted to the inner diameter of the bottom of the filter tank 410 to ensure a tight fit, and its height is generally between 10-30 cm. The conical block 430 plays a key role in guiding the liquid flow to the filter holes 420 within the filter tank 410. When wastewater enters the filter tank 410, the conical block 430 evenly disperses the liquid in all directions, allowing the liquid to flow more evenly to the filter holes 420 on the bottom side wall of the filter tank 410, avoiding the liquid from concentrating in local areas, thereby improving filtration efficiency and effect, and ensuring the stability and uniformity of the filtration process.

[0069] In some examples, the wastewater pretreatment device 400 also includes a rotating rod 450 and an extension rod 451. One end of the rotating rod 450 is connected to a second rotation drive device, and the entire rotating rod is located within the filter tank 410. The rotating rod 450 serves as the driving component of the entire fiber cleaning structure. Its rotation drives the extension rod 451 and the hook 452 to rotate, achieving dynamic cleaning of the fibers within the filter tank 410. It provides the hook 452 with rotational power and a central axis, enabling the hook 452 to contact and hook onto the floating fibers within the filter tank 410, thus cleaning the fibers and preventing excessive accumulation of fibers in localized areas, ensuring smooth liquid flow and filtration efficiency within the filter tank 410. There are four extension rods 451, which are staggered vertically on the rotating rod 450. The axis of each extension rod 451 is parallel to a radial line of the rotating rod 450. The extension rod 451 and the rotating rod 450 are connected by welding or bolts, and the connection is reinforced to withstand the centrifugal force during rotation. Several hooks 452 are evenly distributed on each extension rod 451. The hooks 452 are made of bent stainless steel wire and are shaped like fishhooks. One end is fixed to the extension rod 451, and the other end is hooked for hooking fiber filaments.

[0070] The extension rod 451 transmits the rotation of the rotating rod 450 to different positions within the filter tank 410, expanding the effective range of the hook 452. Driven by the extension rod 451, the hook 452 rotates within the filter tank 410 along with the rotating rod 450, actively hooking and catching fibers floating in the wastewater. This prevents fibers from accumulating near the filter holes 420 and causing blockage, further improving filtration efficiency and extending the service life of the filter tank 410.

[0071] In some examples, a blocking sleeve 460, a transition box 470, and a second rotation drive 480 are also included. The blocking sleeve 460 is cylindrical in shape to fit the bottom of the filter tank 410, with an inner diameter larger than the outer diameter of the bottom of the filter tank 410. The upper end of the blocking sleeve 460 is fixed to the bottom of the washing tank 200, and the lower end of the blocking sleeve 460 is lower than the bottom of the filter tank 410, so that the blocking sleeve 460 can block the liquid passing through the filter hole 420.

[0072] The liquid flowing out of the filter hole 420 is temporarily stored in the transition box 470 located at the bottom of the barrier sleeve 460 under the action of the barrier sleeve 460 and gravity. The liquid in the transition box 470 can be pumped into the crystallizer by a water pump.

[0073] The second rotation drive component 480 is a motor capable of both forward and reverse rotation. The drive end of the second rotation component passes through the bottom of the filter tank 410 and the conical block 430, and is connected to the rotating rod 450, allowing the second rotation drive component 480 to drive the rotating rod 450 to rotate. The drive end of the second rotation drive component 480 is rotatably sealed to the bottom of the filter tank 410, preventing liquid loss. The structural fit between the second rotation drive component 480 located at the bottom of the filter tank 410 and the filter holes 420 located on the side wall of the filter tank 410 prevents liquid from contacting the second rotation drive component 480, thus extending its service life.

[0074] In some examples, several hooks 452 are located on the upper and lower sides of the sidewall of the extension rod 451, respectively. This dual-sided distribution effectively increases the probability of contact between the hooks 452 and the fibers. The openings of the hooks 452 are all tangentially facing the rotating rod 450 in one direction of rotation. By utilizing the relative motion of the water flow during rotation, the fibers are more easily "captured" by the hooks 452 as the rotating rod 450 rotates.

[0075] When it is necessary to clean the fibers on the hook 452, the rotating rod 450 can be reversed. The relative movement of the water flow during the rotation makes it easier for the fibers to detach from the component. After the water in the filter tank 410 is drained, the operator can remove the solid filter plate 440 or clean the fibers and residual solids from the outlet 210 of the water washing tank 200.

[0076] Working principle: When it is necessary to clean the sewage in the washing tank 200, the plug valve is opened, allowing the sewage in the washing tank 200 to enter the filter tank 410. The rotating rod 450 in the filter tank 410 rotates under the drive of the second rotating drive 480, and the hook 452 captures the fibers in the water in the filter tank 410. Then the sewage flows out from the filter hole 420, leaving the solids in the sewage in the filter tank 410. The sewage enters the transition box 470 under the action of the baffle sleeve 460. The sewage in the transition box 470 is introduced into the crystallization tank 100 by a water pump. The acidity or alkalinity of the sewage is detected by the pH detector in the crystallization tank 100, and then an appropriate amount of pH adjuster is added to make the sewage neutral and form salt. Refrigerant is introduced into the refrigerant inlet pipe 310, allowing the refrigerant to enter the crystallization tank 100 and exchange heat with the sewage. As the temperature of the sewage in the crystallization tank 100 decreases, the salt precipitates in the form of crystals. During the process of introducing refrigerant into the refrigerant inlet pipe 310, the refrigerant outlet pipe 320 can be rotated by the first rotating drive component 340. This allows the stirring blades to quickly mix the pH adjuster, and also enables the refrigerant in the refrigerant inlet pipe 310 to dynamically contact the wastewater in the crystallization tank 100, thereby improving the cooling efficiency of the wastewater. Finally, the drain port 120 at the bottom of the crystallization tank 100 is opened, allowing the wastewater to flow out from the drain port 120, and the precipitated salt crystals are blocked on the crystallization filter plate.

[0077] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A wastewater harmless treatment device for fiber production, used to treat liquid in a fiber washing tank (200), characterized in that, include: A crystallization tank (100) is disposed on one side of the washing tank (200). The crystallization tank (100) is connected to the washing tank (200) so that the liquid in the washing tank (200) can enter the crystallization tank (100). The crystallization tank (100) has a pH adjuster inlet (110). A refrigerant inlet pipe (310) is provided on the crystallizer (100). The refrigerant inlet pipe (310) is a hollow pipe. One end of the refrigerant inlet pipe (310) is located outside the crystallizer (100), and the other end is located inside the crystallizer (100). A refrigerant outlet pipe (320) is sleeved outside the refrigerant inlet pipe (310). There is an outlet gap (321) between the inner wall of the refrigerant outlet pipe (320) and the outer wall of the refrigerant inlet pipe (310). One end of the refrigerant outlet pipe (320) is located outside the crystallizer (100). The refrigerant outlet pipe (320) is configured such that the refrigerant inlet pipe (310) passes through the side wall of the refrigerant outlet pipe (320) and communicates with the end of the refrigerant outlet pipe (320) located in the crystallizer (100). A wastewater pretreatment device (400) is also connected between the washing tank (200) and the crystallization tank (100). The wastewater pretreatment device (400) is located at the outlet (210) of the washing tank (200). The wastewater pretreatment device (400) is used to filter fibers and solid impurities in the liquid flowing out of the outlet (210). A gate valve (220) is provided between the wastewater pretreatment device (400) and the washing tank (200). The gate valve (220) is used to open or close the outlet (210). The wastewater pretreatment device (400) also includes: A filter tank (410) is disposed at the bottom of the washing tank (200). A conical block (430) is disposed at the bottom of the filter tank (410). A rotating rod (450) is rotatably disposed within the filter tank (410); There are several extension rods (451), all of which are arranged on the rotating rod (450). The axis of the extension rod (451) extends radially along the rotating rod (450) toward the inner wall of the filter tank (410). The extension rods (451) are all located above the conical block (430). The extension rods (451) are provided with several hooks (452), which are used to hook the fiber filaments in the filter tank (410). Several hooks (452) are located on the upper and lower sides of the side wall of the extension rod (451), and the openings of the hooks (452) all face the same direction.

2. The wastewater harmless treatment device for fiber production according to claim 1, characterized in that, The refrigerant inlet pipe (310) has a straight pipe section (311), a connecting section (312) and a spiral section (313) connected in sequence. The refrigerant outlet pipe (320) is sleeved on the outside of the straight pipe section (311). The connecting section (312) penetrates the side wall of the refrigerant outlet pipe (320) and communicates with the spiral section (313). The end of the spiral section (313) away from the connecting section (312) is connected to the end of the refrigerant outlet pipe (320) located inside the crystallizer (100).

3. The wastewater harmless treatment device for fiber production according to claim 1, characterized in that, The crystallization tank (100) has a drain outlet (120) at the bottom and also includes: A crystallized salt filter plate (130) is disposed inside the crystallization tank (100). The crystallized salt filter plate (130) is located between the refrigerant outlet pipe (320) and the drain outlet (120). The crystallized salt filter plate (130) is used to filter the crystallized salt.

4. The wastewater harmless treatment device for fiber production according to claim 1, characterized in that, Also includes: A transmission pipe (330) is rotatably mounted on the crystallizing tank (100), and the transmission pipe (330) is fixedly sleeved on the refrigerant outlet pipe (320); A first rotation drive (340) is disposed on the crystallizing tank (100). The first rotation drive (340) is used to drive the transmission pipe (330) to rotate so that the transmission pipe (330) can drive the refrigerant outlet pipe (320) to rotate. There are several stirring blades (350), all of which are arranged on the refrigerant outlet pipe (320). The stirring blades (350) are used to stir the liquid in the crystallization tank (100).

5. The wastewater harmless treatment device for fiber production according to claim 4, characterized in that, The end of the refrigerant inlet pipe (310) that communicates with the outside is higher than the end of the refrigerant outlet pipe (320) located outside the crystallizer (100), and also includes: A liquid receiving tank (360) is provided on the refrigerant outlet pipe (320). The liquid receiving tank (360) is close to the top of the refrigerant outlet pipe (320) so that the liquid in the refrigerant outlet pipe (320) can fall into the liquid receiving tank (360).

6. The wastewater harmless treatment device for fiber production according to claim 1, characterized in that, The wastewater pretreatment device (400) includes: The filter tank (410) is located at the bottom of the outlet (210), and the slide valve (220) is located between the filter tank (410) and the outlet (210). The side wall of the filter tank (410) near the bottom has a plurality of filter holes (420), and a solid filter plate (440) is provided at the filter holes (420). The conical block (430) is used to guide the liquid in the filter tank (410) to the filter hole (420).

7. The wastewater harmless treatment device for fiber production according to claim 6, characterized in that, Also includes: A blocking sleeve (460) is disposed at the bottom of the filter tank (410). The blocking sleeve (460) is sleeved on the outside of the filter tank (410). There is a passage space (461) between the inner wall of the blocking sleeve (460) and the outer wall of the filter tank (410). The blocking sleeve (460) is used to block the outward splashing through the filter hole (420). A transition box (470) is disposed below the blocking sleeve (460). The transition box (470) is used to receive the liquid falling through the passage space (461). The transition box (470) is connected to the crystallization tank (100). The second rotation drive (480) is disposed at the bottom of the filter tank (410). The drive end of the second rotation drive (480) passes through the bottom of the filter tank (410) and the conical block (430) in sequence and is connected to the rotating rod (450) for transmission.

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