A polyester melt filter element cleaning water recycling system

Abstract

The present invention discloses a polyester melt filter element cleaning water reuse system, which includes a precipitation device, a pH adjustment tank device, a filtering device, a low-temperature evaporator and a water storage tank that are connected in sequence. Multi-stage precipitation is performed by the precipitation device to initially precipitate large particles, and then the pH is adjusted by the pH adjustment tank device, and then filtered by the filtering device. Finally, salt components in the water are effectively removed by the low-temperature evaporator and collected in the water storage tank. The polyester melt filter element cleaning water reuse system of the present invention can efficiently treat wastewater generated by a high-pressure cleaner to meet the standards of industrial water, and reuse it for the high-pressure cleaner, effectively and greatly reducing damage to the high-pressure cleaner, while also avoiding secondary contamination of the polyester melt filter element. The reuse system of the present invention has the characteristics of low operating cost, stable operation and simple maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of chemical fiber wastewater treatment, and in particular to a polyester melt filter element cleaning water recycling system. Background Art

[0002] Polyester fiber is the leading brand of synthetic fibers, with polyester fiber being the most industrially mass-produced. Polyester fiber is melt-spun, resulting in a generally round cross-section and smooth, straight longitudinally. Industrially mass-produced polyester fiber is made from polyethylene terephthalate. To ensure safe and stable production, when the pressure differential between the filter tank and the filter exceeds 50 kg / cm², the melt filter tank must be switched online. High-temperature hydrolysis is often used to clean the filter element. This involves using a domestically advanced automatic high-pressure cleaning machine, the Zhongke Yinhan AWM-61, with three cleaning pumps: one for internal flushing at a flow rate of 50 L / min and two for external flushing at a flow rate of 30 L / min. This process generates a large amount of cleaning wastewater, primarily containing sodium hydroxide, titanium dioxide, carbon black, and degraded small organic molecules. Given the large volume of cleaning wastewater generated, discharging it to a public utility for treatment would not only increase the wastewater treatment burden and costs, but also waste water resources. Therefore, a filter element cleaning water reuse system is urgently needed. Summary of the Invention

[0003] The object of the present invention is to provide a polyester melt filter element cleaning water recycling system to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A polyester melt filter element cleaning water recycling system comprises a precipitation device, a pH regulating tank device, a filtering device, a low-temperature evaporator and a water storage tank connected in sequence;

[0006] The sedimentation device includes a slow-flow water inlet area and a multi-stage sedimentation and filtration area;

[0007] The pH adjustment tank device includes a mixing zone, a flow mixing adjustment zone and a water collection zone which are connected in sequence;

[0008] The filter device includes a filter body and a timing cleaning mechanism.

[0009] Preferably, the slow flow water inlet area includes a rectangular slow flow body, a slow flow water inlet is provided above the slow flow body, the slow flow water inlet is connected to the water outlet of the high pressure cleaning machine, a slow flow outlet is provided on one side of the slow flow body, a plurality of slow flow plates distributed at intervals are hinged at the slow flow outlet, and a rain dispersion plate is fixed under the slow flow plate.

[0010] Preferably, the multi-stage sedimentation and filtration zone includes a sedimentation and filtration tank, in which a plurality of partition plates are fixed, and the heights of the partition plates decrease sequentially.

[0011] Preferably, the mixing zone is a mixing cavity, which is provided with a wastewater inlet and a pH regulator inlet on the top, and a mixed liquid outlet at the bottom. The flow mixing adjustment zone is an S-shaped mixing tube or a spirally distributed mixing tube. One end of the mixing tube is fixedly connected to the mixed liquid outlet, and a first dispersion plate and a second dispersion plate are fixed in sequence below the other end.

[0012] Preferably, the first dispersion plate includes a conical dispersion block located in the center, and the conical dispersion block is spirally distributed with guide grooves. The first dispersion plate is provided with a plurality of first dispersion water outlet holes on the outer side of the conical dispersion block, and the second dispersion plate is provided with a plurality of second dispersion water outlet holes, and the second dispersion water outlet holes are staggered with the first dispersion water outlet holes.

[0013] Preferably, the water collection area is in the shape of a hollow rectangular parallelepiped with two slide grooves opened laterally therein, and a primary filter component is slidably connected in the slide groove. The primary filter component includes a frame body and a non-woven fabric layer fixed on the frame body.

[0014] Preferably, the filter body includes a filter shell, in which filter cores distributed in a circular pattern are fixed, a filter cavity is formed inside the filter core, a filter water inlet and a cleaning water inlet nozzle are provided above the filter shell, a sewage discharge port is provided inside the filter core below the filter shell, and a filter water outlet is provided on the lower side of the filter shell.

[0015] Preferably, the filter core is a hollow annular structure, and its inner and outer sides are both surrounded by a wavy filter mesh to form a closed circle, and the wavy units on the inner side bulge inward, and the wavy units on the outer side bulge outward, and the wavy units on the inner side and the wavy units on the outer side are staggered.

[0016] Preferably, the filter holes on the inner side of the filter core body and the filter holes on the outer side are staggered.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The present invention discloses a polyester melt filter element cleaning water recycling system, which includes a sedimentation device, a pH regulating tank device, a filtering device, a low-temperature evaporator and a water storage tank connected in sequence. The system can effectively treat the wastewater generated by the high-pressure cleaning machine to meet the standards of industrial water and reuse it for the high-pressure cleaning machine. It is efficient and greatly reduces the damage to the high-pressure cleaning machine, while also avoiding secondary contamination of the polyester melt filter element. The recycling system of the present invention has the characteristics of low operating cost, stable operation and simple maintenance.

[0019] (2) The present invention discloses a polyester melt filter element cleaning water reuse system, which includes a sedimentation device, wherein the sedimentation device includes a slow-flow water inlet area and a multi-stage sedimentation and filtration area. The slow-flow water inlet area is hinged by a slow-flow plate, which can not only disperse the incoming wastewater and prepare it for entering the multi-stage sedimentation and filtration area for effective and rapid flocculation and sedimentation, but also when the wastewater hits the slow-flow plate, the slow-flow plate can be adaptively swung and adjusted, which can effectively achieve the effect of slow flow and increase the time of flocculation and sedimentation.

[0020] (3) The present invention discloses a polyester melt filter element cleaning water reuse system, which includes a pH regulating tank device, wherein the pH regulating tank device includes a mixing zone, a flow homogenizing regulating zone and a water collection zone which are connected in sequence. Preliminary mixing is performed in the mixing zone, and the flow homogenizing regulating zone can quickly, efficiently and simply achieve a neutralization reaction by changing the flow mode of the fluid. At the same time, the first dispersion plate and the second dispersion plate not only play the role of dispersion and neutralization, but also play the role of diversion, so that when filtering on the non-woven fabric layer, the water will not be concentrated in one place, which greatly improves the effect of preliminary filtration.

[0021] (4) The present invention discloses a polyester melt filter element cleaning water reuse system, which includes a filtering device, the filtering device includes a filtering shell, a filtering core body distributed in a circumferential manner is fixed in the filtering shell, the inner side and outer side of the filtering core body are both surrounded by a wave-shaped filter mesh to form a closed circle, and the wave units on the inner side protrude inwardly, and the wave units on the outer side protrude outwardly, and the wave units on the inner side and the wave units on the outer side are staggered, and the filtering holes on the inner side of the filtering core body are staggered with the filtering holes on the outer side. The staggered distribution of the inner and outer filtering holes prevents the water after the first filtration from flowing directly out of the corresponding filtering holes on the outer side, preventing the impurities from being flushed out of the filtering holes on the outer side due to the impact force of the water flow, that is, effectively preventing the occurrence of the phenomenon of secondary ineffective filtration. The staggered distribution of the wave units on the inner layer ensures that after the first filtration, the water flow hits the arc surface to have a disturbance effect, preventing the phenomenon of impurities clogging the filtering holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the overall structure of a polyester melt filter element cleaning water recycling system of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the precipitation device of the present invention;

[0024] Figure 3 This is a schematic structural diagram of the pH adjustment tank device of the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the primary filter assembly of the present invention;

[0026] Figure 5 It is a cross-sectional diagram of the filtering device of the present invention;

[0027] Figure 6 It is a schematic diagram of the filter core structure of the present invention. DETAILED DESCRIPTION

[0028] The present invention is further described below with reference to the accompanying drawings. The embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0030] A polyester melt filter element cleaning water reuse system includes a precipitation device 1, a pH adjustment tank device 2, a filtering device 3, a low-temperature evaporator 4 and a water storage tank 5 connected in sequence. The present invention performs multi-stage precipitation through the precipitation device 1 to initially precipitate large particles, then adjusts the pH through the pH adjustment tank device 2, then filters through the filtering device 3, and finally effectively removes salt components in the water through the low-temperature evaporator 4, and then collects the water in the water storage tank 5. The polyester melt filter element cleaning water reuse system of the present invention can efficiently treat wastewater generated by a high-pressure cleaner to meet the standards of industrial water, and reuse it for the high-pressure cleaner, effectively and greatly reducing damage to the high-pressure cleaner, while also avoiding secondary contamination of the polyester melt filter element. The reuse system of the present invention has the characteristics of low operating cost, stable operation and simple maintenance.

[0031] Specifically, the sedimentation device 1 includes a slow-flow water inlet area and a multi-stage sedimentation and filtration area;

[0032] The slow flow water inlet area includes a rectangular slow flow body, a slow flow water inlet is provided above the slow flow body, the slow flow water inlet is connected to the water outlet of the high-pressure cleaning machine, and a slow flow outlet is provided on one side of the slow flow body. A plurality of slow flow plates 11 are hinged at the slow flow outlet to be distributed at intervals. The hinged manner of the slow flow plate 11 can not only disperse the incoming wastewater, but also prepare for entering the multi-stage sedimentation and filtration area for effective and rapid flocculation and sedimentation. At the same time, when the wastewater hits the slow flow plate 11, the slow flow plate 11 can be adaptively swung and adjusted, which can effectively achieve the effect of slowing down the flow and increase the flocculation and sedimentation time. A rain dispersion plate 13 is fixed below the slow flow plate 11, and the rain dispersion plate 13 includes a rectangular plate body, and a plurality of dispersion water outlet holes are formed on the plate body to further disperse and divert the wastewater;

[0033] The multi-stage sedimentation and filtration area includes a sedimentation and filtration tank, in which a plurality of partition plates 12 are fixed. The heights of the partition plates 12 decrease successively so that wastewater can overflow from the partition plates 12. Flocculants need to be added during use to remove suspended matter and other impurities.

[0034] Specifically, the pH adjustment tank device 2 includes a mixing zone 25, a flow mixing adjustment zone 26 and a water collection zone 27 which are connected in sequence;

[0035] The mixing zone is a mixing cavity, with a wastewater inlet and a pH regulator inlet provided on the top, a mixed liquid outlet provided at the bottom, and a liquid level sensor provided inside. The flow mixing adjustment zone is an S-shaped mixing tube or a spirally distributed mixing tube 28, one end of the mixing tube is fixedly connected to the mixed liquid outlet, and a control valve is provided thereat, and a first dispersion plate 21 and a second dispersion plate 22 are fixed in sequence below the other end thereof, the first dispersion plate 21 includes a conical dispersion block 23 located in the center, a guide groove is spirally distributed on the conical dispersion block 23, a plurality of first dispersion water outlet holes are opened on the outer side of the conical dispersion block 23 on the first dispersion plate 21, a plurality of second dispersion water outlet holes are opened on the second dispersion plate 22, and the second dispersion water outlet holes are staggered with the first dispersion water outlet holes, the water collection area is a hollow rectangular parallelepiped, two slide grooves are provided in the horizontal direction inside, a primary filter component is slidably connected in the slide groove, and the primary filter component includes a frame body and a filter element fixed to the frame body. The non-woven fabric layer 24 on the frame body slides continuously, and the primary filter component can be regularly extracted and replaced with a clean one for use. It is simple, convenient and low-cost. The specific process is: the precipitated sewage enters the pump body and enters the mixing area. After the corresponding acidic additives are added for mixing, the control valve is opened, and the mixed sewage is evenly mixed in the mixing tube during multiple changes in flow direction. Then it hits the conical dispersion block 23 and diverts to the surrounding areas. Part of it is gathered and mixed along the guide groove for neutralization, and part of it is mixed and neutralized during the dispersed flow process of the first dispersed water outlet and the second dispersed water outlet. The evenly dispersed neutralized sewage flows to the non-woven fabric layer 24 for preliminary filtration. The present invention can quickly, efficiently and simply achieve neutralization through the flow mode of the fluid. At the same time, the first dispersion plate 21 and the second dispersion plate not only play the role of dispersion and neutralization, but also play the role of diversion, so that when filtering on the non-woven fabric layer 24, it will not be concentrated in one place and flow down, greatly improving the effect of preliminary filtration.

[0036] The filter element 31 is a hollow annular structure, and its inner and outer sides are both surrounded by a wave-shaped filter mesh to form a closed circle, and the wave units on the inner side are convex inward, and the wave units on the outer side are convex outward, and the wave units on the inner side are staggered with the wave units on the outer side. The filter holes on the inner side of the filter element 31 and the filter holes on the outer side are staggered. The staggered distribution of the inner and outer filter holes ensures that the water after the first filtration will not flow directly out of the corresponding filter holes on the outer side, thereby preventing impurities from being flushed out of the filter holes on the outer side due to the impact force of the water flow. The staggered distribution of the wave units on the inner layer ensures that after the first filtration, the water flow hits the curved surface to have a disturbance effect, thereby preventing impurities from clogging the filter holes.

[0037] A filter water inlet and a cleaning water inlet nozzle are provided above the filter housing, a sewage discharge port 32 is provided inside the filter core 31 below the filter housing, and a filter water outlet 33 is provided on the lower side of the filter housing. During normal use, the sewage discharge port 32 is in a normally closed state, water flows in from the filter water inlet and then flows out from the filter water outlet 33. If the filter core 31 needs to be cleaned, it is flushed through the cleaning water inlet nozzle (not shown in the drawing, the nozzle is a conventional component in this field, so it will not be described in detail), and most of the sewage is discharged from the sewage discharge port 32, which has the effect of regular cleaning.

[0038] Specifically, the low-temperature evaporator 4 is a conventional device in the art, which uses a certain amount of steam input to effectively remove salt components in the washing water through multiple evaporation and condensation.

[0039] Specifically, the water storage tank 5 can not only store water, but also further precipitate water.

[0040] The above is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A polyester melt filter element cleaning water recycling system, characterized by: It comprises a precipitation device (1), a pH regulating tank device (2), a filtering device (3), a low-temperature evaporator (4) and a water storage tank (5) which are connected in sequence; The sedimentation device (1) comprises a slow-flow water inlet area and a multi-stage sedimentation and filtration area; The pH adjustment tank device (2) comprises a mixing zone (25), a flow mixing adjustment zone (26) and a water collection zone (27) which are connected in sequence; The slow flow inlet area includes a rectangular slow flow body, a slow flow inlet is provided above the slow flow body, the slow flow inlet is connected to the water outlet of the high pressure cleaning machine, a slow flow outlet is provided on one side of the slow flow body, a plurality of slow flow plates (11) are hingedly connected to the slow flow outlet, a rain dispersion plate (13) is fixed below the slow flow plate (11), and the rain dispersion plate (13) includes a rectangular plate body, and a plurality of dispersed water outlet holes are formed on the plate body; The multi-stage sedimentation and filtration zone includes a sedimentation and filtration tank, wherein a plurality of partition plates (12) are fixed inside the tank, and the height of the partition plates (12) decreases sequentially; The mixing zone (25) is a mixing cavity, with a wastewater inlet and a pH regulator inlet provided on its top, and a mixed liquid outlet provided on its bottom. The flow mixing adjustment zone is an S-shaped mixing tube (28) or a spirally distributed mixing tube (28). One end of the mixing tube (28) is fixedly connected to the mixed liquid outlet, and a first dispersion plate (21) and a second dispersion plate (22) are fixed in sequence below the other end. The first dispersion plate (21) includes a conical dispersion block (23) located in the center, and a guide groove is spirally distributed on the conical dispersion block (23). The first dispersion plate (21) is provided with a plurality of first dispersion water outlet holes on the outer side of the conical dispersion block (23), and the second dispersion plate (22) is provided with a plurality of second dispersion water outlet holes, and the second dispersion water outlet holes are staggered with the first dispersion water outlet holes.

2. A polyester melt filter element cleaning water recycling system according to claim 1, characterized in that: The water collection area is in the shape of a hollow rectangular parallelepiped, and two slide grooves are opened in the transverse direction inside the water collection area. A primary filter component is slidably connected in the slide groove, and the primary filter component includes a frame body and a non-woven fabric layer (24) fixed on the frame body.

3. The polyester melt filter element cleaning water recycling system according to claim 1, characterized in that: The filter device (3) comprises a filter housing, wherein filter cores (31) distributed in a circumferential manner are fixed in the filter housing, a filter cavity is formed inside the filter core (31), a filter water inlet and a cleaning water inlet nozzle are provided above the filter housing, a sewage discharge port (32) is provided inside the filter core (31) below the filter housing, and a filter water outlet (33) is provided on the lower side of the filter housing.

4. A polyester melt filter element cleaning water recycling system according to claim 3, characterized in that: The filter core (31) is a hollow annular structure, and its inner and outer sides are both formed into a closed circle by a wave-shaped filter mesh, and the wave units on the inner side bulge inward, and the wave units on the outer side bulge outward, and the wave units on the inner side and the wave units on the outer side are staggered.

5. The polyester melt filter element cleaning water recycling system according to claim 3, characterized in that: The filter holes on the inner side of the filter core (31) and the filter holes on the outer side are distributed in an alternating manner.

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