Solid-liquid separation device and coal chemical plant wastewater treatment system
By using rotatable separation components and partition structures in the solid-liquid separation device, the problem of grille filter mesh aperture is solved, and efficient solid-liquid separation and process continuity is achieved.
Patent Information
- Application Number
- CN202422205293.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-09
AI Technical Summary
In the prior art, the large pore size of the grille filter mesh leads to poor filtration effect, and the small pore size affects the solid-liquid separation efficiency and the continuity of subsequent processes.
A solid-liquid separation device is designed, adopting a rotatable separation assembly and partition structure, and a filter hole is provided on the separation assembly, and liquid enters the second space and solid enters the first space, so that the filter hole is blocked by rotation.
It achieves efficient solid-liquid separation effect, avoids filter hole clogging, and ensures the continuity of subsequent processes.
Smart Images
Figure CN223118281U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of coal chemical production technology, and in particular to a solid-liquid separation device and a coal chemical plant wastewater treatment system. Background Art
[0002] With the popularization of the concept of environmental protection and green development, the rapid development of the coal chemical industry, and the extremely severe environmental situation, all regions not only control the quality of wastewater discharge according to relevant standards, but also strictly control the total amount of pollutants. There are many types of coal chemical wastewater, and the composition of pollutants in the water is complex. It is a very typical difficult-to-treat industrial wastewater. The wastewater generated by coal chemical plants often contains a lot of solid particles, which must be treated to avoid affecting the subsequent treatment process.
[0003] At present, the treatment of solid particles in wastewater is mostly simple solid-liquid separation, for example: filtering using a grid filter.
[0004] However, if the pore size of the grid filter is too large, the filtering effect will be poor, and if the pore size is too small, the solid-liquid separation efficiency and even the continuity of the subsequent process will be affected. Utility Model Content
[0005] The first aspect of the present application provides a solid-liquid separation device, which comprises
[0006] A shell, wherein the shell has a storage space, wherein a first partition is provided in the storage space at least along a first direction, wherein the first partition divides the storage space into a first space and a second space that are adjacent to each other along a second direction and are connected at the top, and wherein a liquid inlet corresponding to the second space is provided at the top of the shell;
[0007] A separation component, the separation component is arranged to rotate around the first direction at the top of the second space in the shell, and a plurality of filter holes are provided on the separation component, so that the liquid in the fluid to be separated entering through the liquid inlet is filtered and enters the second space, and the solid enters the first space as the separation component rotates;
[0008] The first direction and the second direction meet a vertical condition.
[0009] In some modified embodiments of the first aspect of the present application, the solid-liquid separation device, wherein
[0010] The separation assembly includes a mounting frame and a plurality of first filter screens;
[0011] The mounting frame is arranged along the first direction and is provided with at least one opening to form an inlet for the fluid to be separated and an outlet for the solid;
[0012] A plurality of the first filter screens are arranged on the mounting frame, and a plurality of the filter holes are provided on the first filter screens and the mounting frame.
[0013] In some modified embodiments of the first aspect of the present application, for the aforementioned solid-liquid separation device, wherein the mounting frame includes a first mounting plate, a second mounting plate and a mounting shaft;
[0014] The mounting shaft extends along the first direction, and the first mounting plate and the second mounting plate are respectively arranged at two ends of the mounting shaft;
[0015] A plurality of the first filter screens are arranged at intervals around the mounting shaft, and two ends of the first filter screen along the first direction are respectively connected to the first mounting plate and the second mounting plate.
[0016] In some modified embodiments of the first aspect of the present application, for the aforementioned solid-liquid separation device, wherein the mounting frame includes a first mounting plate, a second mounting plate and a mounting shaft;
[0017] The mounting shaft extends along the first direction, and the first mounting plate and the second mounting plate are respectively arranged at two ends of the mounting shaft;
[0018] A plurality of the first filter screens are arranged in parallel and at intervals along a third direction, and two ends of the first filter screen along the first direction are respectively connected to the first mounting plate and the second mounting plate;
[0019] Wherein, the aperture diameters of the filter holes on a plurality of the first filter screens gradually decrease in a direction away from the liquid inlet; the third direction satisfies the perpendicular condition with the first direction and the second direction.
[0020] In some modified embodiments of the first aspect of the present application, for the aforementioned solid-liquid separation device, it further includes a second filter screen;
[0021] The second filter screen is arranged between the second space and the separation assembly, and the aperture diameter of the filter holes on the second filter screen is smaller than the aperture diameter of the filter holes on the separation assembly.
[0022] In some modified embodiments of the first aspect of the present application, for the aforementioned solid-liquid separation device, an oil absorption layer is provided on one side of the second filter screen facing the separation assembly.
[0023] In some modified embodiments of the first aspect of the present application, for the aforementioned solid-liquid separation device, it further includes a second partition;
[0024] The second partition is disposed along the second direction on a side of the first partition facing the bottom wall of the housing. The circumferential edge of the second partition is simultaneously connected to the inner wall of the housing and the first partition, so that the side wall of the housing, the second partition, and the first partition enclose the first space;
[0025] Wherein, a plurality of second filter holes are provided on the second partition.
[0026] In some alternative embodiments of the first aspect of the present application, in the aforementioned solid-liquid separation device, a switchable discharge door is provided on the housing wall corresponding to the first space and opposite to the first partition.
[0027] In some alternative embodiments of the first aspect of the present application, in the aforementioned solid-liquid separation device, a liquid discharge port communicating with the second space is provided at the bottom of the housing.
[0028] The second aspect of the present application provides a coal chemical plant wastewater treatment system, which includes
[0029] The aforementioned solid-liquid separation device;
[0030] A biochemical tank, the liquid inlet of which is connected to the liquid discharge port of the solid-liquid separation device;
[0031] A reclaimed water reuse treatment tank, the liquid inlet of which is connected to the liquid discharge port of the biochemical tank;
[0032] An advanced oxidation tank, the liquid inlet of which is connected to the liquid discharge port of the reclaimed water reuse treatment tank.
[0033] Compared with the prior art, the solid-liquid separation device provided in this embodiment can effectively avoid the problem of blockage while ensuring the separation effect through the rotational separation of the separation component, providing a strong guarantee for the continuity of the subsequent process; effectively solving the problem that in the existing solid-liquid separation method, if the aperture of the grid filter is too large, the filtering effect is poor, and if the aperture is too small, it will affect the solid-liquid separation efficiency and even the continuity of the subsequent process. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] By referring to the accompanying drawings and reading the following detailed description, the above and other objects, features, and advantages of the exemplary embodiments of the present application will become readily understandable. In the drawings, several embodiments of the present application are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:
[0035] Figure 1 Schematically shows a structural diagram of the solid-liquid separation device provided in this embodiment;
[0036] Figure 2Schematically shows a second structural schematic diagram of the solid-liquid separation device provided in this embodiment;
[0037] Figure 3 Schematically shows a second structural schematic diagram of the solid-liquid separation device provided in this embodiment;
[0038] Figure 4 Schematically shows Figure 2 a side view of the solid-liquid separation device in
[0039] Figure 5 Schematically shows a structural schematic diagram of the separation component in the solid-liquid separation device provided in this embodiment;
[0040] Figure 6 Schematically shows a structural schematic diagram of the coal chemical plant wastewater treatment system provided in this embodiment;
[0041] Explanation of the reference numerals in the drawings:
[0042] Shell 1, liquid inlet 11, liquid outlet 12, separation component 2, filter holes 21, first filter screen 22, first mounting plate 23, second mounting plate 24, mounting shaft 25, drive motor 26, first partition 3, first space 4, second space 5, second filter screen 6, grease adsorption layer 7, second partition 8, second filter holes 81, discharge door 9, biochemical tank 10, first anoxic tank 101, first aerobic tank 102, second anoxic tank 103, second aerobic tank 104, membrane bioreactor tank 105, intermediate water reuse treatment tank 20, advanced oxidation tank 30, first direction a, second direction b, third direction c. Detailed implementation manners
[0043] Hereinafter, the exemplary embodiments of the present disclosure will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.
[0044] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which this application belongs.
[0045] There are many types of coal chemical industry wastewater, and the components of pollutants in the water are complex. It is a very typical industrial wastewater that is difficult to treat. In the wastewater generated by coal chemical plants, the content of solid particles is often high, and it must be treated to avoid affecting subsequent treatment processes. Currently, the treatment of solid particles in wastewater mostly uses a grid-type filter screen for filtration. However, if the aperture of the grid-type filter screen is too large, the filtration effect is not good; if the aperture is too small, it will affect the solid-liquid separation efficiency and even the continuity of subsequent processes.
[0046] Therefore, the solid-liquid separation device provided in this embodiment sets a rotatable separation component in the shell, so that after the separation component receives the fluid to be separated, it can automatically introduce the liquid into the second space, and then rotate to introduce the solid into the first space. The solid-liquid separation effect is good, and the problem of filter hole blockage can be avoided by rotation.
[0047] Example 1
[0048] Reference appendix Figure 1 Referring to the attached drawings, the solid-liquid separation device provided in this embodiment includes a shell 1 and a separation component 2; there is an accommodation space in the shell 1, and at least a first partition 3 is provided in the accommodation space along a first direction a. The first partition 3 divides the accommodation space into a first space 4 and a second space 5 that are adjacent along a second direction b and communicate at the top. A liquid inlet 11 corresponding to the second space 5 is provided at the top of the shell 1; the separation component 2 is rotatably arranged around the first direction a at the top of the second space 5 in the shell, and a plurality of filter holes 21 are provided on the separation component 2, so that the liquid in the fluid to be separated entering through the liquid inlet 11 is filtered into the second space 5, and the solid enters the first space 4 along with the rotation of the separation component 2; wherein, the first direction a and the second direction b satisfy the perpendicular condition.
[0049] It can be understood that in order to solve the problem that in the existing solid-liquid separation method, if the aperture of the grid-type filter screen is too large, the filtration effect is not good; if the aperture is too small, it will affect the solid-liquid separation efficiency and even the continuity of subsequent processes. The solid-liquid separation device provided in this embodiment sets a first partition 3 in the shell 1 to form a separated first space 4 and second space 5, and cooperates with a rotatable separation component 2, so that the solid-liquid separation is carried out immediately after the fluid to be separated contacts the separation component, the fluid is introduced into the second space 5, and the solid remains on the separation component 2 and enters the first space 4 along with its rotation; on the premise of completing the solid-liquid separation, the problem of blockage of the filter holes 21 can be avoided by rotation.
[0050] Among them, the first direction a and the second direction b in this embodiment can be perpendicular to each other or approximately perpendicular. In practice, the first direction a and the second direction b can be two mutually perpendicular directions in the shell 1 that are not in the height direction, for example: the length direction or the width direction of the shell 1.
[0051] Among them, the housing 1 is a rigid structure, which can be, but is not limited to, made of steel; the shape and size of the housing 1 are not limited here and can be designed and adjusted according to actual separation requirements. For example: Figure 1 The internal hollow quadrangular prism structure shown. The housing 1 can be an integrally formed structure or a structure formed by welding plates, which is not limited here. The housing 1 can be provided with a liquid inlet 11 at its top and a liquid outlet 12 at its bottom to realize the feeding of the fluid to be separated and the discharging of the fluid after separation. The shapes and sizes of the liquid inlet 11 and the liquid outlet 12 are not limited here and can be designed and adjusted according to actual needs.
[0052] Among them, the first partition 3 is a rigid plate body, which can be a flat plate body or a special-shaped plate body; in this embodiment, the overall extension trend of the first partition 3 is to extend in the first direction a. The two ends of the first partition 3 along the first direction a are respectively connected to the two inner walls of the housing 1 opposite to each other along the first direction a. Thus, a first space 4 and a second space 5 are respectively formed on both sides of the first partition 3. The sizes and shapes of the first space 4 and the second space 5 are not limited here, as long as they can realize the loading of solids and liquids; the end of the first partition 3 facing the top of the housing 1 remains suspended and does not contact the top wall of the housing 1. Thus, the first space 4 and the second space 5 are connected to reserve space for the setting of the separation assembly 2; the end of the first partition 3 facing the bottom of the housing 1 can contact the bottom wall of the housing 1 or have a small gap with the bottom wall, so that the fluid carried by the solids in the first space 4 can flow into the second space 5 to improve the solid-liquid separation effect. In this embodiment, the liquid inlet 11 is arranged corresponding to the second space 5, so that the fluid to be separated can directly flow into the second space under the action of gravity after entering the separation assembly 2, improving the efficiency. And it is not difficult to understand that in this embodiment, the liquid outlet 13 can be arranged at the bottom of the second space 5.
[0053] Among them, the separation component 2 is arranged between the second space 5 and the liquid inlet 11 and can directly receive the to-be-separated fluid entering. The separation component 2 can be a multi-layer filter screen or a water-wheel type filter screen. After the filter screen receives the to-be-separated fluid, the liquid will directly flow into the second space 5, and the solid will fall into the first space during the rotation of the filter screen towards the first space 4. The separation component 2 can be set to different rotation angles corresponding to different forms. For example, when the separation component 2 is a water-wheel type filter screen, it can be set to a form that can rotate 360 degrees around the first direction a towards the first space 4. When the separation component 2 is a multi-layer parallel filter screen, it can be set to a form that can rotate 120 degrees or 360 degrees around the first direction a towards the first space 4, and the solid is put into the first space 4 by the centrifugal force or turning force of the separation component 2. The aperture of the filter holes 21 on the separation component 2 can be designed and adjusted according to actual needs, and can be of a unified specification or of unequal sizes, which will not be elaborated here. And in this embodiment, the rotation direction of the separation component 2 is unique, that is, it rotates towards the first space 4, so that the solid in the to-be-separated fluid can enter the first space 4 in the first time.
[0054] According to the above, the solid-liquid separation device provided in this embodiment separates through the rotation of the separation component 2, which can effectively avoid the problem of blockage while ensuring the separation effect, and provides a strong guarantee for the continuity of the subsequent process; it effectively solves the problem that in the existing solid-liquid separation method, if the aperture of the grid-type filter screen is too large, the filtering effect is not good, and if the aperture is too small, it will affect the solid-liquid separation efficiency and even the continuity of the subsequent process.
[0055] In this article, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B is specifically understood as: it can include both A and B at the same time, A can exist alone, or B can exist alone, and it can have any one of the above three situations.
[0056] Furthermore, in the solid-liquid separation device provided in this embodiment, in a specific implementation, the separation component 2 includes a mounting frame and a plurality of first filter screens 22; the mounting frame is arranged along the first direction a and is provided with at least one opening to form an inlet for the to-be-separated fluid and an outlet for the solid; a plurality of the first filter screens 22 are arranged on the mounting frame, and a plurality of the filter holes 21 are provided on the first filter screens 22 and the mounting frame.
[0057] It can be understood that in order to realize the acceptance and separation of the separation component 2 for the fluid to be separated, the separation component 2 is set in the present embodiment to include a mounting frame and a plurality of first filter screens 22. The mounting frame is a rigid structure, which provides a mounting position for the first filter screen 22. The mounting frame can be a cylindrical structure, a frame structure, etc. When the mounting frame is a cylindrical structure, at least one opening is set on it to form an inlet for the fluid to be separated and an outlet for the separated solid. Of course, the number of openings can be designed and adjusted according to actual needs, and can be spaced or continuous larger openings. Under this setting mode, filter holes are also set on the mounting frame, so that the fluid can flow directly into the second space through the filter holes; when the mounting frame is a frame structure, a plurality of openings are naturally formed on it, and the fluid to be separated can enter through any opening, and the separated solid can also flow out through any opening. Accordingly, a plurality of first filter screens 22 are installed on the mounting frame, and the mounting frame is used to filter and separate the fluid to be separated, and the solid can be separated at multiple levels to avoid clogging the filter hole 21.
[0058] Furthermore, in the solid-liquid separation device provided in this embodiment, in a specific implementation, the separation component 2 can have at least the following two configuration modes:
[0059] The first one, refer to the attached Figure 1 and attached Figure 5 The mounting frame includes a first mounting plate 23, a second mounting plate 24 and a mounting shaft 25; the mounting shaft 25 extends along the first direction a, and the first mounting plate 23 and the second mounting plate 24 are respectively arranged at two ends of the mounting shaft 25; a plurality of first filter screens 22 are arranged at intervals around the mounting shaft 25, and the first filter screens 22 are respectively connected to the first mounting plate 23 and the second mounting plate 24 at two ends along the first direction a.
[0060] It can be understood that in order to achieve the separation function of the separation component 2 and simplify the structure, in this embodiment, the mounting frame is set to include a first mounting plate 23, a second mounting plate 24 and a mounting shaft 25; the first mounting plate 23 and the second mounting plate 24 are both rigid circular plates, and the mounting shaft 25 is fixed to the two at the same time, so that an annular space around the mounting shaft 25 is formed between the first mounting plate 23 and the second mounting plate 24, and then a plurality of first filter screens 22 are spaced and distributed in the annular space, which can be distributed at equal intervals or at non-equal intervals. The connection between the two ends of the first filter screen 22 and the first mounting plate 23 and the second mounting plate 24 can be bonding, screwing, etc., to ensure relative fixation; and then the aforementioned opening is formed between adjacent first filter screens 22, and the fluid to be separated entering the liquid inlet 11 can enter the space between adjacent first filter screens 22 through any opening, and then filter out the fluid into the second space 5 through the filter holes on the first filter screen 22, and the solid is centrifugally separated or flipped and separated into the first space 4 by the rotation of the mounting shaft 25.
[0061] Second, the mounting bracket includes a first mounting plate 23, a second mounting plate 24 and a mounting shaft 25; the mounting shaft 25 extends along the first direction a, and the first mounting plate 23 and the second mounting plate 24 are respectively arranged at both ends of the mounting shaft 25; a plurality of the first filter screens 22 are arranged in parallel and at intervals along the third direction c, and both ends of the first filter screen 22 along the first direction a are respectively connected to the first mounting plate 23 and the second mounting plate 24; wherein, the aperture diameters of the filter holes 21 on the plurality of the first filter screens 22 gradually decrease in the direction away from the liquid inlet 11; the third direction c satisfies the perpendicular condition with the first direction a and the second direction b.
[0062] It can be understood that, on the premise that the mounting bracket includes the first mounting plate 23, the second mounting plate 24 and the mounting shaft 25, in this embodiment, a plurality of the first filter screens 22 can also be arranged at intervals along the third direction c, and the third direction c is the height direction of the housing 1; and in this embodiment, the filter holes 21 on the plurality of the first filter screens 22 arranged at intervals along the third direction a are arranged in a gradually decreasing form, so as to be able to separate and filter solids, improve the separation effect and avoid blockage. In this setting mode, the separation component 2 is set to be able to flip 90 degrees or 120 degrees in the direction of the first space 4. In this embodiment, the flipping of the separation component 2 can be set at a specified time interval, for example: flip once every 20s.
[0063] It can be understood that for the above two setting modes of the separation component 2, referring to Appendix 4, in this embodiment, a driving motor 26 can be correspondingly arranged for the mounting shaft 25, and the end of the mounting shaft 25 passes through the housing 1 and is connected to the output shaft of the driving motor 26 to realize the automatic control of the rotation or flipping of the separation component 2 and improve the separation efficiency.
[0064] Furthermore, referring to Appendix Figure 2 , in the solid-liquid separation device provided in this embodiment, in a specific implementation, it further includes a second filter screen 6; the second filter screen 6 is arranged between the second space 5 and the separation component 2, and the aperture diameter of the filter holes on the second filter screen 6 is smaller than the aperture diameter of the filter holes 21 on the separation component 2.
[0065] It can be understood that, in order to improve the separation effect and prevent solids from being carried into the second space 5 during the rotation of the separation component 2, a second filter screen 6 is provided in this embodiment. The second filter screen 6 can be provided at the top of the first partition 3 or at any position in the height direction of the first partition 3. The second filter screen 6 covers the upper opening of the second space 6. The fluid to be separated can enter the second space through the filter holes of the second filter screen 6, while solids with a particle size larger than the aperture of the filter holes of the second filter screen 6 will be blocked by the second filter screen 6. Neither the smaller solids passing through the first filter screen 22 nor the solids carried into the upper part of the second space 5 by the rotation of the separation component 2 can enter the second space 5, thus improving the separation effect.
[0066] Further, referring to the attached Figure 2 , in the solid-liquid separation device provided in this embodiment, in a specific implementation, an oil absorption layer 7 is provided on the side of the second filter screen 6 facing the separation component 2.
[0067] It can be understood that there will be a certain amount of oil in the wastewater of a coal chemical plant. Therefore, in order to improve the separation effect, an oil absorption layer 7 is provided on the second filter screen 6 in this embodiment. The oil absorption layer 7 can be a porous material, such as activated carbon, sponge, sintered block, fiber, cotton fabric, felt, etc. The oil absorption layer 7 can be set as a multi-layer structure or an intermittent block structure; in this embodiment, the oil absorption layer 7 can be provided corresponding to the filter holes of the second filter screen 6 or can avoid the filter holes of the second filter screen 6.
[0068] Further, referring to the attached Figure 3 and the attached Figure 4 , in the solid-liquid separation device provided in this embodiment, in a specific implementation, it further includes a second partition 8; the second partition 8 is arranged along the second direction b on the side of the first partition 3 facing the bottom wall of the housing 1. The circumferential edge of the second partition 8 is simultaneously connected to the inner wall of the housing 1 and the first partition 3, so that the side wall of the housing 1, the second partition 8, and the first partition 3 enclose the first space 4; wherein, a plurality of second filter holes 81 are provided on the second partition 8.
[0069] It can be understood that, in order to improve the separation effect, a second partition 8 is provided in this embodiment. The second partition 8 is a rigid plate body, which is provided at the bottom end of the first partition 3. The circumferential edge of the second partition 8 is respectively connected to the circumferential inner wall of the housing 1 corresponding to the first space 4 and the first partition 3 to serve as the bottom wall of the first space 4. In this setting mode, the second space 5 includes the space between the second partition 8 and the bottom wall of the housing 1; in this embodiment, the second partition 8 is spaced from the bottom wall of the housing 1. Therefore, after the separated solids enter the first space 4, the liquid they carry can enter the second space 5 through the second filter holes 81, and the separation effect can be further improved under the action of gravity without any other external force.
[0070] Further, referring to the attached Figure 2 , in the solid-liquid separation device provided in this embodiment, in a specific implementation, a switchable discharge door 9 is provided on the shell wall of the shell 1 corresponding to the first space 4 and opposite to the first partition 3.
[0071] It can be understood that, in order to clean the separated solids in a timely manner and ensure the separation efficiency of the solid-liquid separation device, the discharge door 9 is provided in this embodiment. The discharge door 9 is provided corresponding to the first space 4, and can be provided not only on the side opposite to the first partition 3, but also on the side adjacent to the first partition 3, as long as there is no interference with the second space 5. The discharge door 9 is a rigid structure, and its size and shape are not limited herein, and can be designed and adjusted according to actual needs, as long as it is adapted to the corresponding opening on the shell 1. The discharge door 9 can be turned up and down around the first direction a or turned left and right around the third direction c, and can be connected to the shell 1 through a rotating shaft or a hinge; a locking member (not shown in the figure) can also be provided in cooperation on the discharge door 9 and the shell 1. When the solids do not need to be cleaned, it is kept in a locked state to prevent the discharge door 9 from opening. When the bones need to be cleaned, the locking member is unlocked and the discharge door 9 is opened to clean the solids.
[0072] Embodiment 2
[0073] Referring to the attached Figure 6 , this embodiment provides a coal chemical plant wastewater treatment system, which includes the solid-liquid separation device, a biochemical tank 10, a reclaimed water reuse treatment tank 20, and an advanced oxidation tank 30. The liquid inlet of the biochemical tank 10 is connected to the liquid discharge port 12 of the solid-liquid separation device; the liquid inlet of the reclaimed water reuse treatment tank 20 is connected to the liquid discharge port of the biochemical tank 10; the liquid inlet of the advanced oxidation tank 30 is connected to the liquid discharge port of the reclaimed water reuse treatment tank 20.
[0074] It can be understood that the solid-liquid separation device in this embodiment is the same as that in Embodiment 1. For its specific structure and working principle, please refer to the detailed description in Embodiment 1 and will not be elaborated here. The solid-liquid separation device is used to collect the wastewater generated by the coal chemical plant, filter and separate it, and then mix and homogenize it before discharging the liquid to the biochemical pool 10. The biochemical pool 10 performs biochemical treatment on the received liquid and then discharges the liquid to the reclaimed water reuse treatment pool 20. The reclaimed water reuse treatment pool 20 performs secondary filtration on the received liquid. Then, a part of the liquid is returned to the biochemical pool 10 as circulating water for reuse, and the other part of the liquid is discharged to the advanced oxidation pool 30. The advanced oxidation pool 30 performs chemical reactions on the received liquid to remove organic substances. For example, it is set as an ozone catalytic pool to ensure that the discharge meets the discharge standards before discharging. In this embodiment, due to the complex composition of the wastewater generated by the coal chemical plant's coal gasification process, the chemical oxygen demand (COD, Chemical Oxygen Demand) and total nitrogen are relatively high, and the treatment difficulty is high. There is a special relationship between the biochemical oxygen demand (BOD, Biochemical Oxygen Demand) and the total nitrogen (TN, Total Nitrogen). For example, BOD5 / TN < 1, the carbon-nitrogen ratio in the water is seriously imbalanced, and the total nitrogen in the wastewater is relatively high, about 250 mg / L, which needs to be reduced to less than 15 mg / L, and the removal rate needs to reach more than 94%. The treatment difficulty is relatively large. Therefore, in this embodiment, the biochemical pool 10 can be set to include a first-stage anoxic tank 101, a first-stage aerobic tank 102, a second-stage anoxic tank 103, a second-stage aerobic tank 104, and a membrane bioreactor (MBR) 105 connected in series in sequence, which is convenient for performing biochemical treatment on the liquid and improving the treatment effect. The first-stage anoxic tank 101 is connected to the second space 5, and the membrane bioreactor 105 is connected to the reclaimed water reuse treatment pool 20 to receive the circulating water.
[0075] As described above, the above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A solid-liquid separation device, characterized in that, It includes: A housing having an accommodation space therein. At least a first partition is provided in the accommodation space along a first direction. The first partition divides the accommodation space into a first space and a second space adjacent to each other along a second direction and having a connected top. A liquid inlet corresponding to the second space is provided at the top of the housing. A separation assembly rotatably arranged around the first direction at the top of the second space in the housing. A plurality of filter holes are provided on the separation assembly so that the liquid in the fluid to be separated entering through the liquid inlet is filtered into the second space, and the solids enter the first space as the separation assembly rotates. Wherein, the first direction and the second direction satisfy the perpendicular condition.
2. The solid-liquid separation device according to claim 1, characterized in that: The separation assembly includes a mounting frame and a plurality of first filter screens; The mounting frame is arranged along the first direction and at least has an opening to form an inlet for the fluid to be separated and an outlet for the solids; A plurality of the first filter screens are arranged on the mounting frame, and a plurality of the filter holes are provided on the first filter screens and the mounting frame.
3. The solid-liquid separation device according to claim 2, characterized in that: The mounting frame includes a first mounting plate, a second mounting plate and a mounting shaft; The mounting shaft extends along the first direction, and the first mounting plate and the second mounting plate are respectively arranged at both ends of the mounting shaft; A plurality of the first filter screens are arranged at intervals around the mounting shaft, and both ends of the first filter screens along the first direction are respectively connected to the first mounting plate and the second mounting plate.
4. The solid-liquid separation device according to claim 2, characterized in that: The mounting frame includes a first mounting plate, a second mounting plate and a mounting shaft; The mounting shaft extends along the first direction, and the first mounting plate and the second mounting plate are respectively arranged at both ends of the mounting shaft; A plurality of the first filter screens are arranged in parallel and at intervals along a third direction. Both ends of the first filter screens along the first direction are respectively connected to the first mounting plate and the second mounting plate; Wherein, the pore diameters of the filter holes on a plurality of the first filter screens gradually decrease in the direction away from the liquid inlet; the third direction and the first direction, the second direction satisfy the perpendicular condition.
5. The solid-liquid separation device according to claim 1, characterized in that: It further includes a second filter screen; The second filter screen is arranged between the second space and the separation assembly, and the pore diameter of the filter holes on the second filter screen is smaller than the pore diameter of the filter holes on the separation assembly.
6. The solid-liquid separation device according to claim 5, characterized in that ； An oil absorption layer is provided on the side of the second filter screen facing the separation assembly.
7. The solid-liquid separation device according to claim 1, characterized in that: It further includes a second partition; The second partition is arranged along the second direction on the side of the first partition facing the bottom wall of the housing. The circumferential edge of the second partition is simultaneously connected to the inner wall of the housing and the first partition so that the side wall of the housing, the second partition and the first partition enclose the first space; Wherein, a plurality of second filter holes are provided on the second partition.
8. The solid-liquid separation device according to claim 1, wherein: An openable and closable discharge door is provided on the shell wall of the shell corresponding to the first space and opposite to the first partition.
9. The solid-liquid separation device according to claim 1, wherein: A liquid discharge port communicating with the second space is provided at the bottom of the shell.
10. A coal chemical plant wastewater treatment system, characterized in that It includes: The solid-liquid separation device according to any one of claims 1-9; A biochemical pool, the liquid inlet of which is connected to the liquid discharge port of the solid-liquid separation device; A reclaimed water reuse treatment pool, the liquid inlet of which is connected to the liquid discharge port of the biochemical pool; An advanced oxidation pool, the liquid inlet of which is connected to the liquid discharge port of the reclaimed water reuse treatment pool.