Seed collection device and treatment system for softening of sewage water

Abstract

The application provides a seed collecting device and a treatment system for sewage softening treatment, and relates to the technical field of sewage softening treatment. The seed collecting device comprises a stock bin, a first screw conveyor and a second screw conveyor. The stock bin has a containing cavity and is provided with a water inlet communicating with the containing cavity. The containing cavity is used for containing a mixed solution formed by particles and sewage, wherein the particles comprise seeds. The first screw conveyor is connected with the stock bin and is provided with a first particle outlet. The first screw conveyor comprises a feeding section. The feeding section is arranged in the containing cavity and is provided with a liquid inlet. The liquid inlet is located below the plane of the liquid level of the mixed solution in the up-down direction, so that the mixed solution can enter the feeding section for conveying. The second screw conveyor is arranged outside the stock bin and communicates with the first particle outlet. The second screw conveyor and the first screw conveyor are both provided with a water outlet. The application can realize solid-liquid separation and transportation of seeds, and ensure the recovery efficiency of the seeds.

Description

Technical Field

[0001] This invention relates to the field of wastewater softening treatment technology, and in particular to a seed collection device and treatment system for wastewater softening treatment. Background Technology

[0002] Induced crystallization technology solves the pain points of "excessive sludge, difficult separation, and low efficiency" in wastewater softening by "directively controlling crystal growth". It is especially suitable for high-hardness industrial wastewater (such as circulating cooling wastewater and chemical wastewater) and municipal wastewater reuse scenarios. With the development of seed reuse technology and biological treatment or membrane separation coupling, its application in the field of wastewater softening will be further popularized, becoming an important technical means to achieve the integration of "water saving, pollution reduction and resource recovery".

[0003] After the wastewater softening process is completed, a large number of seed crystals will be mixed in the wastewater. In order to reduce operating costs, improve process efficiency and reduce solid waste generation, and simplify subsequent separation processes and reduce equipment load, it is necessary to recover the seed crystals from the softened wastewater. However, the devices used for seed crystal recovery in related technologies have poor solid-liquid separation effect on solid-liquid mixtures, which affects the seed crystal recovery efficiency. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, one embodiment of the present invention provides a seed collection device for wastewater softening treatment, which can realize solid-liquid separation and transportation of seed crystals, and ensure seed crystal recovery efficiency.

[0006] Another embodiment of the present invention provides a wastewater softening treatment system.

[0007] According to an embodiment of the present invention, a seed collection device for wastewater softening treatment includes a silo, a first screw conveyor, and a second screw conveyor. The silo has a receiving cavity and an inlet communicating with the receiving cavity. The receiving cavity is used to receive a mixture of particles and wastewater, wherein the particles include seed crystals. The first screw conveyor is connected to the silo and has a first particle outlet. The first screw conveyor includes a feeding section located within the receiving cavity and has a liquid inlet located below the plane containing the liquid surface of the mixture in the vertical direction, so that the mixture can enter the feeding section for conveying. The second screw conveyor is located outside the silo and communicates with the first particle outlet. Both the second screw conveyor and the first screw conveyor have drain outlets.

[0008] According to an embodiment of the present invention, a seed collection device for wastewater softening treatment includes a silo that can receive a large amount of solid seed particles and wastewater mixture discharged from the wastewater softening reactor. A first screw conveyor is used to perform preliminary solid-liquid separation of the mixture in the silo's receiving cavity. The seed particles in the mixture are transported by the first screw conveyor and a portion of the water is separated out. Since the feed section of the first screw conveyor is located in the receiving cavity, some water will also be carried away by the first screw conveyor along with the seed particles. Afterward, the seed particles exiting the first screw conveyor will enter a second screw conveyor for further transport and water separation. This device achieves simultaneous collection of solid seed particles in the mixture and transportation of the seed, facilitating subsequent recovery and transfer of the seed. Therefore, compared with related technologies, the present invention can achieve solid-liquid separation and transportation of the seed, ensuring seed recovery efficiency.

[0009] In some embodiments, the first screw conveyor extends toward the second screw conveyor and is arranged at an upward inclination, and the second screw conveyor extends away from the first screw conveyor and is arranged at an upward inclination. The first particle outlet is located outside the hopper and above the second screw conveyor in the vertical direction.

[0010] In some embodiments, on a projection plane orthogonal to the vertical direction, the projection of the first screw conveyor forms an angle with the projection of the second screw conveyor; On the projection plane formed by the vertical direction and the extension direction of the first screw conveyor, the projection of the first screw conveyor forms an angle α with the horizontal plane, and on the projection plane formed by the vertical direction and the extension direction of the second screw conveyor, the projection of the second screw conveyor forms an angle β with the horizontal plane, where α < β.

[0011] In some embodiments, on the projection plane formed by the vertical direction and the extension direction of the first screw conveyor, the projection of the first screw conveyor forms an angle α with the horizontal plane, and α is 15°-35°.

[0012] In some embodiments, on the projection plane formed by the vertical direction and the extension direction of the second screw conveyor, the projection of the second screw conveyor forms an angle β with the horizontal plane, and β is 40°-50°.

[0013] In some embodiments, the length of the first screw conveyor is less than the length of the second screw conveyor.

[0014] In some embodiments, each of the first screw conveyor and the second screw conveyor includes a housing and a conveying auger. The housing is a hollow structure and has the drain outlet at its bottom. The conveying auger is rotatably connected to the inner cavity of the housing to convey particles. The pivot axis of the conveying auger is aligned with the extension direction of either the first screw conveyor or the second screw conveyor. The outer casing of the first screw conveyor is connected to the hopper and is at least partially located in the receiving cavity, and the portion of the outer casing of the first screw conveyor located in the receiving cavity is provided with the liquid inlet.

[0015] In some embodiments, a sealing structure is provided at the connection between the outer casing of the first screw conveyor and the hopper to seal the connection gap between the outer casing and the hopper.

[0016] In some embodiments, the seed collection device further includes a support frame detachably connected to the housing, wherein there are at least two support frames arranged at intervals along the extension direction of the housing, the extension direction of the housing being either the extension direction of the first screw conveyor or the extension direction of the second screw conveyor.

[0017] In some embodiments, the seed collection device further includes a liquid level monitoring device and a control valve. The liquid level monitoring device is disposed in the receiving cavity and is used to monitor the liquid level of the mixture in the receiving cavity. The control valve is disposed in the water inlet to control the opening and closing of the water inlet.

[0018] According to an embodiment of the present invention, a wastewater softening treatment system includes a wastewater softening reactor and a seed collection device. The wastewater softening reactor is provided with a discharge port. The seed collection device is the seed collection device described in any of the above embodiments, and the inlet of the hopper of the seed collection device is connected to the discharge port.

[0019] According to the wastewater softening treatment system of the present invention, the seed collection device is designed to realize the solid-liquid separation and transportation of seed crystals, and the seed crystal recovery efficiency is high. Therefore, compared with related technologies, the wastewater softening treatment system using this seed collection device can reuse the recovered seed crystals to reduce energy consumption, shorten the production cycle, and thus improve wastewater treatment efficiency.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] Figure 1 This is a top view schematic diagram of a seed collection device for wastewater softening treatment according to an embodiment of the present invention.

[0022] Figure 2 This is a schematic front view of a seed collection device for wastewater softening treatment according to an embodiment of the present invention.

[0023] Figure 3 This is a side view of a seed collection device for wastewater softening treatment according to an embodiment of the present invention (the hopper is omitted in the figure).

[0024] Figure label: 1. Hopper; 11. Receiving cavity; 12. Discharge port; 2. First screw conveyor; 21. First particle outlet; 22. Feed section; 23. Outer shell; 24. Conveying auger; 3. Second screw conveyor; 31. Second particle outlet; 4. Support frame; 5. Diagonal bracing. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] like Figures 1 to 3 As shown in the figure, an embodiment of the present invention provides a seed collection device for wastewater softening treatment, comprising a silo 1, a first screw conveyor 2, and a second screw conveyor 3. The silo 1 has a receiving cavity 11 and an inlet (not shown in the figure) communicating with the receiving cavity 11. The receiving cavity 11 is used to receive a mixture of particles and wastewater, wherein the particles include seed crystals. The first screw conveyor 2 is connected to the silo 1 and has a first particle outlet 21. The first screw conveyor 2 includes a feeding section 22, which is located inside the receiving cavity 11 and has a liquid inlet (not shown in the figure). The liquid inlet is located below the plane where the liquid surface of the mixture is located in the vertical direction, so that the mixture can enter the feeding section 22 for conveying. The second screw conveyor 3 is located outside the silo 1 and communicates with the first particle outlet 21. Both the second screw conveyor 3 and the first screw conveyor 2 have drain outlets (not shown in the figure).

[0027] According to an embodiment of the present invention, a seed collection device for wastewater softening treatment includes a silo 1 that can receive a large amount of solid seed particles and wastewater mixture discharged from the wastewater softening reactor. A first screw conveyor 2 is used to perform preliminary solid-liquid separation of the mixture in the receiving cavity 11 of the silo 1. The seed particles in the mixture are transported by the first screw conveyor 2 and a portion of the water is separated. Since the feed section 22 of the first screw conveyor 2 is located in the receiving cavity 11, some water will also be carried away by the first screw conveyor 2 along with the seed particles. Afterward, the seed particles exiting the first screw conveyor 2 will enter the second screw conveyor 3 for further transport and water separation. This device achieves simultaneous collection of solid seed particles in the mixture and transportation of the seed, facilitating subsequent recovery and transfer of the seed. Therefore, compared with related technologies, the present invention can achieve solid-liquid separation and transportation of the seed, ensuring seed recovery efficiency.

[0028] It is understandable that the first screw conveyor 2 and the second screw conveyor 3 work together to make the mixture undergo two solid-liquid separation transports, which extends the solid-liquid separation transport length of the mixture and can ensure the solid-liquid separation effect of the mixture, that is, the separation effect of the seed crystals in the mixture is good.

[0029] Specifically, the silo 1 is also provided with an outlet 12 connecting to the receiving cavity 11. The outlet 12 is used to discharge wastewater from the receiving cavity 11. The outlet 12 can be located at the bottom of the silo 1 to facilitate wastewater discharge. The inlet can be opened at the top of the silo 1, or the top of the receiving cavity 11 can be an open structure, with the open top of the receiving cavity 11 forming the inlet. The length of the feeding section 22 is about two-thirds of the length of the first screw conveyor 2, that is, about two-thirds of the first screw conveyor 2 is arranged inside the receiving cavity 11. The second screw conveyor 3 can transport the seed crystals to the outside of the processing workshop. The second screw conveyor 3 can be provided with a second particle outlet 31, which is suitable for connection to external transfer equipment (such as trucks) so that the external transfer equipment can periodically receive the seed crystals and then pull them away.

[0030] like Figure 2 and Figure 3 As shown, in some embodiments, the first screw conveyor 2 extends toward the second screw conveyor 3 and is arranged at an upward inclination, and the second screw conveyor 3 extends away from the first screw conveyor 2 and is arranged at an upward inclination.

[0031] The first particle outlet 21 is located outside the hopper 1 and above the second screw conveyor 3 in the vertical direction, so that the seed particles in the first screw conveyor 2 can automatically fall into the second screw conveyor 3 under the action of gravity, without the need for additional power equipment, simplifying the overall structure and reducing costs.

[0032] It is understandable that designing both the first screw conveyor 2 and the second screw conveyor 3 to be arranged at an upward inclination can not only further extend the conveying length of both under the same arrangement space conditions, but also allow the seed particles to be rotated and transported by the first screw conveyor 2 or the second screw conveyor 3 during the solid-liquid separation process of the mixture, while the sewage is smoothly discharged from the drain outlet.

[0033] Specifically, the first particle outlet 21 is located near the top of the first screw conveyor 2, and the second particle outlet 31 is located near the top of the second screw conveyor 3. The conveying direction of each of the first screw conveyor 2 and the second screw conveyor 3 is from the bottom to the top (or from bottom to top), wherein the bottom is the end near the horizontal plane (or the arrangement site) and the top is the end away from the horizontal plane.

[0034] like Figures 1 to 3 As shown, in some embodiments, the projection of the first screw conveyor 2 and the projection of the second screw conveyor 3 form an angle on a projection plane orthogonal to the vertical direction. For example, as shown in the figure, the projection of the first screw conveyor 2 and the projection of the second screw conveyor 3 are perpendicular to each other on a projection plane orthogonal to the vertical direction.

[0035] On the projection plane formed by the vertical direction and the extension direction of the first screw conveyor 2, the projection of the first screw conveyor 2 forms an angle α with the horizontal plane. On the projection plane formed by the vertical direction and the extension direction of the second screw conveyor 3, the projection of the second screw conveyor 3 forms an angle β with the horizontal plane, where α < β. In other words, relative to the horizontal plane (or the ground, i.e., the arrangement area of ​​the first screw conveyor 2 and the second screw conveyor 3), the second screw conveyor 3 has a larger inclination angle than the first screw conveyor 2, or the second screw conveyor 3 is steeper. This is beneficial for the separation of seed crystals and wastewater within the second screw conveyor 3, further ensuring the solid-liquid separation effect of the seed crystals.

[0036] like Figure 2 As shown, in some embodiments, on the projection plane formed by the vertical direction and the extension direction of the first screw conveyor 2, the projection of the first screw conveyor 2 forms an angle α with the horizontal plane, and α is 15°-35°. For example, α can be 15°, 20°, 25°, 30°, 35°, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0037] like Figure 3As shown, in some embodiments, on the projection plane formed by the vertical direction and the extension direction of the second screw conveyor 3, the projection of the second screw conveyor 3 forms an angle β with the horizontal plane, and β is 40°-50°. β can be, for example, 40°, 42°, 44°, 46°, 48°, 50°, etc., but is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0038] It is understandable that by adopting the above structural design, the two-stage solid-liquid separation structure formed by the first spiral conveyor 2 and the second spiral conveyor 3 can ensure the solid-liquid separation and transportation effect of the seed crystals.

[0039] like Figures 1 to 3 As shown, in some embodiments, the length of the first spiral conveyor 2 is less than the length of the second spiral conveyor 3. Based on the above structure, it can be seen that the second spiral conveyor 3 is longer and more inclined than the first spiral conveyor 2, which is beneficial for further separating water and ensuring the quality of seed crystal recovery.

[0040] like Figures 1 to 3 As shown, in some embodiments, each of the first screw conveyor 2 and the second screw conveyor 3 includes a housing 23 and a conveying auger 24. The housing 23 has a hollow structure and a drain outlet at its bottom, which facilitates the automatic discharge of separated wastewater from the drain outlet under gravity. The conveying auger 24 is rotatably connected to the inner cavity of the housing 23 to convey particles. The direction of the pivot axis of the conveying auger 24 is consistent with the extension direction of the first screw conveyor 2 or the extension direction of the second screw conveyor 3.

[0041] The outer casing 23 of the first screw conveyor 2 is connected to the hopper 1 and is at least partially located in the receiving cavity 11. The portion of the outer casing 23 of the first screw conveyor 2 located in the receiving cavity 11 is provided with a liquid inlet.

[0042] It is understandable that the first screw conveyor 2 or the second screw conveyor 3 are formed by the cooperation of the outer shell 23 and the conveying auger 24. The conveying auger 24 can realize the rotational conveying of the seed particles in the inner cavity of the outer shell 23, and the outer shell 23 can ensure that the entire conveying process is a sealed environment. Therefore, no excess sewage will be spilled during the transportation process of each of the first screw conveyor 2 and the second screw conveyor 3, and the entire transportation process is efficient and hygienic.

[0043] Specifically, the liquid inlet of the first screw conveyor 2 can be opened on the outer shell 23 of the feeding section 22, or the outer shell 23 of the feeding section 22 can be an open structure at the top, in which case the open structure at the top of the outer shell 23 of the feeding section 22 forms the liquid inlet.

[0044] like Figure 1 and Figure 2As shown, in some embodiments, a sealing structure is provided at the connection between the outer shell 23 of the first screw conveyor 2 and the hopper 1 to seal the connection gap between the outer shell 23 and the hopper 1, further preventing the problem of sewage seeping out from the connection between the two during the solid-liquid separation and transportation of the seed crystals. For example, the outer shell 23 of the first screw conveyor 2 is welded and sealed to the hopper wall of the hopper 1.

[0045] like Figure 2 and Figure 3 As shown, in some embodiments, the seed collection device further includes a support frame 4, which is detachably connected to the housing 23. There are at least two support frames 4, which are spaced apart along the extension direction of the housing 23, which is the extension direction of the first screw conveyor 2 or the extension direction of the second screw conveyor 3.

[0046] Understandably, the multiple support frames 4 can ensure the reliable installation of the seed collection device at the site. In addition, the way the support frame 4 is detachably connected to the outer shell 23 facilitates the assembly and disassembly of the two, which is beneficial to the fact that if one of them is damaged, only the corresponding one can be replaced, so as to ensure the service life of both and save costs.

[0047] Specifically, the seed collection device may also include a diagonal brace 5, the first end of which is connected to the support frame 4, and the second end of which is connected to the outer shell 23, so that the three are arranged in a triangle to ensure stable and reliable support for the outer shell 23.

[0048] In some embodiments, the seed collection device further includes a liquid level monitoring device and a control valve (not shown in the figure). The liquid level monitoring device is located in the receiving cavity 11 and is used to monitor the liquid level of the mixture in the receiving cavity 11. The control valve is located at the water inlet to control the opening and closing of the water inlet.

[0049] Understandably, the liquid level monitoring device can monitor the liquid level of the mixture in the containment cavity 11 in real time, so that the control valve can be closed after the liquid level of the mixture reaches the preset height, cutting off the liquid entering the containment cavity 11 from the inlet, effectively preventing the risk of leakage caused by the liquid level of the mixture in the containment cavity 11 being too high.

[0050] A wastewater softening treatment system (not shown in the figure) according to an embodiment of the present invention includes a wastewater softening reactor and a seed collection device. The wastewater softening reactor is provided with a discharge port. The seed collection device is any of the seed collection devices described in the above embodiments. The inlet of the hopper 1 of the seed collection device is connected to the discharge port.

[0051] According to the wastewater softening treatment system of the present invention, the seed collection device is designed to realize the solid-liquid separation and transportation of seed crystals, and the seed crystal recovery efficiency is high. Therefore, compared with related technologies, the wastewater softening treatment system using this seed collection device can reuse the recovered seed crystals to reduce energy consumption, shorten the production cycle, and thus improve wastewater treatment efficiency.

[0052] Specifically, the discharge outlet can be located at the bottom of the wastewater softening reactor. The discharge outlet can be connected to the inlet via a pipe.

[0053] Furthermore, the discharge port 12 at the bottom of the aforementioned silo 1 can be connected to a wastewater softening reactor via a pipeline, allowing the wastewater discharged from silo 1 to be returned to the wastewater softening reactor for treatment. Therefore, no waste liquid is generated during the entire particle discharge and transportation process. Simultaneously, the recovered seed crystals can be reused in the wastewater softening treatment system to shorten the seed crystal induction period, eliminating the need to prepare new seed crystals for each crystallization, reducing energy consumption and lowering energy and time costs. Furthermore, reusing seed crystals of the same specifications ensures greater uniformity in particle size, purity, and morphology for each crystallization, reducing batch-to-batch quality variations.

[0054] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, 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 this invention.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0056] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0057] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A seed crystal collection device for wastewater softening treatment, characterized in that, include: A silo having a receiving cavity and an inlet communicating with the receiving cavity, the receiving cavity being used to receive a mixture of particles and wastewater, wherein the particles include seed crystals; A first screw conveyor is connected to the silo and has a first particle outlet. The first screw conveyor includes a feeding section, which is located in the receiving cavity and has a liquid inlet. The liquid inlet is located below the plane where the liquid surface of the mixture is located in the vertical direction, so that the mixture can enter the feeding section for conveying. The second screw conveyor is located outside the silo and connected to the first particle outlet. Both the second screw conveyor and the first screw conveyor are equipped with drainage outlets.

2. The seed collection device for wastewater softening treatment according to claim 1, characterized in that, The first screw conveyor extends toward the second screw conveyor and is arranged at an upward inclination, and the second screw conveyor extends away from the first screw conveyor and is arranged at an upward inclination. The first particle outlet is located outside the hopper and above the second screw conveyor in the vertical direction.

3. The seed collection device for wastewater softening treatment according to claim 2, characterized in that, On a projection plane orthogonal to the vertical direction, the projection of the first screw conveyor forms an angle with the projection of the second screw conveyor; On the projection plane formed by the vertical direction and the extension direction of the first screw conveyor, the projection of the first screw conveyor forms an angle α with the horizontal plane, and on the projection plane formed by the vertical direction and the extension direction of the second screw conveyor, the projection of the second screw conveyor forms an angle β with the horizontal plane, where α < β.

4. The seed collection device for wastewater softening treatment according to claim 2, characterized in that, On the projection plane formed by the vertical direction and the extension direction of the first screw conveyor, the projection of the first screw conveyor forms an angle α with the horizontal plane, and α is 15°-35°. And / or, on the projection plane formed by the vertical direction and the extension direction of the second screw conveyor, the projection of the second screw conveyor forms an angle β with the horizontal plane, and β is 40°-50°.

5. The seed collection device for wastewater softening treatment according to claim 1, characterized in that, The length of the first screw conveyor is less than the length of the second screw conveyor.

6. The seed collection device for wastewater softening treatment according to any one of claims 1-5, characterized in that, Each of the first screw conveyor and the second screw conveyor includes a housing and a conveying auger. The housing is a hollow structure and has the drain outlet at its bottom. The conveying auger is rotatably connected to the inner cavity of the housing to convey particles. The pivot axis of the conveying auger is in the same direction as the extension direction of the first screw conveyor or the extension direction of the second screw conveyor. The outer casing of the first screw conveyor is connected to the hopper and is at least partially located in the receiving cavity, and the portion of the outer casing of the first screw conveyor located in the receiving cavity is provided with the liquid inlet.

7. The seed collection device for wastewater softening treatment according to claim 6, characterized in that, The connection between the outer shell of the first screw conveyor and the hopper is provided with a sealing structure to seal the connection gap between the outer shell and the hopper.

8. The seed collection device for wastewater softening treatment according to claim 6, characterized in that, It also includes support frames, which are detachably connected to the housing. There are at least two support frames arranged at intervals along the extension direction of the housing, which is either the extension direction of the first screw conveyor or the extension direction of the second screw conveyor.

9. The seed collection device for wastewater softening treatment according to any one of claims 1-8, characterized in that, Also includes: A liquid level monitoring device is disposed in the receiving cavity and is used to monitor the liquid level of the mixture in the receiving cavity; A control valve is provided at the water inlet to control the opening and closing of the water inlet.

10. A wastewater softening treatment system, characterized in that, include: A wastewater softening reactor, wherein the wastewater softening reactor is provided with a discharge outlet; A seed collection device, wherein the seed collection device is any one of claims 1-9, and the inlet of the hopper of the seed collection device is connected to the outlet.

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