Kettle type foaming wastewater recycling device

Abstract

The kettle type foaming wastewater recycling device comprises a wastewater collecting tank, a primary settling tank, a secondary settling tank and a treating fluid collecting tank which are sequentially communicated from left to right, a filtering piece is arranged between the wastewater collecting tank and the primary settling tank, a purifying agent storage bin for accommodating a purifying agent solution is arranged on the secondary settling tank, and the bottoms of the primary settling tank, the secondary settling tank and the treating fluid collecting tank are all communicated with filter presses. Other impurities in the foaming wastewater are preliminarily filtered in the wastewater collection pool; through two sedimentation processes of the primary sedimentation tank and the secondary sedimentation tank, the content of kaolin in the purification liquid is greatly reduced, and the purification liquid obtained after a large amount of wastewater is treated can be directly used for cleaning foamed beads; precipitates in the primary sedimentation tank, the secondary sedimentation tank and the treating fluid collecting tank are filtered by a filter press to obtain kaolin filter residues; the device effectively recovers kaolin in the foaming wastewater, and realizes cyclic utilization of the foaming wastewater.

Description

Technical Field

[0001] The utility model particularly relates to a kettle type foaming wastewater circulation recovery device. Background Art

[0002] Expanded polyolefin (EPP and EPE) beads and their molded parts are lightweight, easy to process into special shapes, and have a clean and pollution-free production and use process. They are ideal alternatives to polyurethane (PU) foam and polystyrene foam (EPS). They have been widely used in automotive parts manufacturing, packaging materials and other fields, and their usage is increasing year by year.

[0003] Foamed polyolefin beads are obtained by autoclave foaming, that is, polyolefin microparticles are heated and softened in a high-pressure autoclave, and at the same time impregnated with carbon dioxide, and then discharged into a normal temperature and pressure environment to obtain foamed beads. To prevent the resin microparticles from agglomerating in the autoclave, the production process generally involves stirring water, kaolin, and butter with the resin microparticles to form a dispersed system. The entire dispersed system is heated and impregnated with high-pressure carbon dioxide, and finally discharged out of the autoclave to obtain single dispersed foamed polyolefin beads. During this process, kaolin may adhere to the surface of the foamed beads, which is not conducive to the mutual adhesion between the bead skins during the subsequent steam molding process, and needs to be rinsed with cleaning water. Both the cleaning wastewater and the wastewater discharged from the autoclave dispersion system contain kaolin and butter, and the amount produced is large and cannot be discharged directly. Effective collection, treatment and utilization of wastewater resources are process issues that need to be paid attention to in the production and manufacturing of autoclave foamed polyolefin beads.

[0004] CN215085474U purifies through primary and secondary sewage pools, and filters most of the kaolin in the primary sewage pool through a filter net to form a secondary sewage slurry, and the filter press directly filters the secondary sewage slurry; most of the kaolin in the EPP primary foaming wastewater is effectively recycled, but according to actual operating conditions, the wastewater finally discharged still contains relatively more kaolin, and direct discharge has an adverse effect on the environment and wastes wastewater resources. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a kettle type foaming wastewater recycling device.

[0006] In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

[0007] A kettle-type foaming wastewater recycling device comprises a wastewater collection tank, a primary sedimentation tank, a secondary sedimentation tank and a treatment liquid collection tank which are sequentially connected from left to right; a filter is arranged between the wastewater collection tank and the primary sedimentation tank, a purifier storage bin for accommodating purifier solution is arranged on the secondary sedimentation tank, and filter presses are connected to the bottoms of the primary sedimentation tank, the secondary sedimentation tank and the treatment liquid collection tank.

[0008] Preferably, an agitator is provided in the wastewater collection tank.

[0009] Preferably, the wastewater collection tank, the primary sedimentation tank, and the secondary sedimentation tank are made of stainless steel.

[0010] Preferably, the filter element is made of metal.

[0011] Preferably, a jacket is provided in the primary sedimentation tank, and a cooling medium is placed in the jacket.

[0012] Preferably, a suction pump is provided between the primary sedimentation tank and the secondary sedimentation tank.

[0013] Preferably, the wastewater collection tank is connected to a wastewater pipe.

[0014] Preferably, the treated liquid collecting tank is connected to a purified liquid discharge pipe.

[0015] The beneficial effects of the utility model are:

[0016] The foaming wastewater of the present application is preliminarily filtered to remove other impurities in the wastewater collection tank; after two sedimentation processes in the primary sedimentation tank and the secondary sedimentation tank, the kaolin content of the purified liquid is greatly reduced, and the purified liquid obtained after a large amount of wastewater is treated can be directly used for washing foaming beads; the precipitates in the primary sedimentation tank, the secondary sedimentation tank and the treated liquid collection tank are filtered through a filter press to obtain kaolin filter residue; this device effectively recovers kaolin in the foaming wastewater and realizes the recycling of the foaming wastewater, which is environmentally friendly and saves water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 This is a schematic structural diagram of a kettle-type foaming wastewater recycling device of the present application;

[0019] Figure 2 This is a schematic diagram of the structure of the filter element of this application. DETAILED DESCRIPTION

[0020] The embodiments of the present invention are described in detail below. The embodiments are shown in the accompanying drawings, wherein the same or similar numbers throughout represent the same or similar elements or elements with the same or similar functions.

[0021] The orientation shown in the drawings cannot be understood as limiting the specific protection scope of the present utility model, and is only provided for reference and understanding of the preferred embodiments. The product components shown in the drawings may be changed in position, increased in number, or simplified in structure.

[0022] The "connection" described in the specification and the mutual "connection" relationship of the components shown in the drawings can be understood as a fixed connection or a detachable connection or an integral connection; it can be a direct connection or a connection through an intermediate medium. Ordinary technicians in this field can understand the connection relationship according to the specific circumstances and can derive different implementation methods in an appropriate manner such as screwing, riveting, welding, clamping or embedding.

[0023] With respect to the directional words such as up, down, left, right, top, bottom, etc. described in the specification and the directions shown in the drawings, the components may be in direct contact or in contact through other features between them; for example, "above" may mean directly above or obliquely above, or it simply means higher than other objects; other directions may be understood by analogy.

[0024] The materials for making parts with solid shapes shown in the specification and the drawings may be metal materials, non-metal materials or other synthetic materials; the mechanical processing techniques used for parts with solid shapes may be stamping, forging, casting, wire cutting, laser cutting, injection molding, CNC milling, 3D printing, machining, etc.; ordinary technicians in this field can adaptively select or combine them according to different processing conditions, costs, and precisions, but are not limited to the above-mentioned materials and manufacturing processes.

[0025] A kettle type foaming wastewater recycling device, referring to Figure 1 , including a wastewater collection tank 1, a primary sedimentation tank 2, a secondary sedimentation tank 3 and a treated liquid collection tank 4 which are connected in sequence from left to right; a filter element 20 is arranged between the wastewater collection tank 1 and the primary sedimentation tank 2, a purifier storage bin 9 for accommodating a purifier solution is arranged on the secondary sedimentation tank 3, and the bottoms of the primary sedimentation tank 2, the secondary sedimentation tank 3 and the treated liquid collection tank 4 are all connected with pipes 30, and all pipes 30 are commonly connected with a filter press 5.

[0026] Furthermore, an agitator 7 is provided in the wastewater collection tank 1 .

[0027] Furthermore, the wastewater collection tank 1, the primary sedimentation tank 2, and the secondary sedimentation tank 3 are made of stainless steel.

[0028] Furthermore, the filter element 20 is made of metal.

[0029] Furthermore, a jacket is provided in the primary sedimentation tank 2, and a cooling medium is placed in the jacket.

[0030] Furthermore, a suction pump 8 is provided between the primary sedimentation tank 2 and the secondary sedimentation tank 3 .

[0031] Furthermore, the wastewater collection tank 1 is connected to a wastewater pipe 6 .

[0032] Furthermore, the treated liquid collecting pool 4 is connected to a purified liquid discharge pipe 10 .

[0033] The working principle of the utility model is:

[0034] The foaming wastewater enters the wastewater collection tank 1 through the wastewater pipe 6. A filter 20 is arranged between the wastewater pipe 6 and the bottom of the wastewater collection tank 1 (a filter can be arranged at the end of the wastewater pipe 6 close to the wastewater collection tank 1, as long as the filter plays a filtering role), which is used to filter other debris in the wastewater. It is preferred that the liquid level of the wastewater collection tank 1 is set lower than the filter 20. An agitator 7 is arranged in the wastewater collection tank 1 to prevent the kaolin in the wastewater from settling in the wastewater collection tank 1 and blocking the relevant suction pipes; the wastewater preliminarily filtered by the filter is sucked into the primary sedimentation tank 2 by the suction pump 8, and after cooling and sedimentation (a jacket can be arranged in the primary sedimentation tank 2 to achieve this, the jacket The cooling medium is placed in the content, and the cooling medium can be cooling water. After most of the kaolin forms precipitation, it is sucked into the filter press 5 through the pipeline 30 for pressure filtration; the non-precipitated treatment liquid in the primary sedimentation tank 2 is sucked into the secondary sedimentation tank 3, and an appropriate amount of purifier solution is added to the secondary sedimentation tank 3 from the purifier storage bin 9. Under the action of the purifier, the kaolin is further precipitated at the bottom of the secondary sedimentation tank 3, and then the precipitation is sucked into the filter press 5 through the pipeline 30 for pressure filtration; the non-precipitated treatment liquid in the secondary sedimentation tank 3 is sucked into the treatment liquid collection tank 4 to obtain the purified liquid, which can be discharged through the suction pump 8 and the discharge pipe 10, and is used again for the cleaning of the foamed polyolefin beads. During the long-term operation of the treatment liquid collection tank, a small amount of kaolin will gradually accumulate and precipitate at the bottom of the treatment liquid collection tank, and it can also be sucked into the filter press 5 for pressure filtration regularly. The filter residue in the filter press 5 is the recovered kaolin, and its filtrate is discharged into the wastewater collection tank 1.

[0035] The wastewater pipe 6 can be made of plastic or stainless steel, with an inner diameter of 100-250mm; the wastewater collection pool 1 can be a stainless steel pool or other non-leaking pool with a volume of 40-60 cubic meters; the filter element 20 in the wastewater collection pool 1 is made of metal, with a thickness of 1-3mm, and has circular filter holes 21 with an inner diameter of 1-1.5mm in the thickness direction, and the number density of the filter holes on the filter surface is 10-20 / cm2; the blade speed of the stirrer is 50-150rpm; the other pipes are made of stainless steel, with a thickness of 1-3mm and an inner diameter of 50-100mm; the motor power of all suction pumps is 7.5-11Kw, and the suction flow rate is 25-40m3 / h;

[0036] The primary sedimentation tank 2 is a stainless steel water tank with a volume of 10-20 cubic meters. Its outer wall is provided with a jacket for circulating cooling medium, which can effectively assist the wastewater in the primary sedimentation tank 2 to cool and settle; the secondary sedimentation tank 3 can be a stainless steel water tank with a volume of 10-20 cubic meters; the purifier storage bin thereon is made of stainless steel with a volume of 20-50L, which can be used to inject auxiliary treatment agents such as purifier solution or sterilizer solution into the secondary sedimentation tank 3; the treatment liquid collection tank is made of stainless steel with a volume of 20-40 cubic meters;

[0037] Based on the actual production situation, the kaolin content in the wastewater from the wastewater pipe 6 is generally 0.3-3g / L. After being treated by this technology, the kaolin content in the purified liquid is 0.005-0.02g / L, which is suitable for washing foam beads.

[0038] Kaolin content detection: Take 100ml of the test solution, distill it, dry the solid residue in an oven at 100℃ for 2h, and weigh it as m (unit g) after cooling. 10m (unit g / L is the kaolin content. The average value of 5 groups of data is taken as the test result.

[0039] The foaming wastewater of the present application is preliminarily filtered to remove other impurities in the wastewater collection tank; after two sedimentation processes in the primary sedimentation tank and the secondary sedimentation tank, the kaolin content of the purified liquid is greatly reduced, and the purified liquid obtained after a large amount of wastewater is treated can be directly used for washing foaming beads; the precipitates in the primary sedimentation tank, the secondary sedimentation tank and the treated liquid collection tank are filtered through a filter press to obtain kaolin filter residue; this device effectively recovers kaolin in the foaming wastewater and realizes the recycling of the foaming wastewater, which is environmentally friendly and saves water resources.

[0040] Although the utility model is described in detail with reference to the above embodiments, it is obvious to those skilled in the art through this disclosure that various changes or modifications can be made to the utility model without departing from the principle and spirit of the utility model defined by the claims. Therefore, the detailed description of the embodiments of the present disclosure is only used to explain, not to limit the utility model, but the scope of protection is limited by the content of the claims.

Claims

1. A kettle type foaming wastewater recycling device, characterized in that: The invention comprises a wastewater collection tank (1), a primary sedimentation tank (2), a secondary sedimentation tank (3) and a treated liquid collection tank (4) which are connected in sequence from left to right; a filter element (20) is arranged between the wastewater collection tank (1) and the primary sedimentation tank (2); a purifier storage bin (9) for accommodating a purifier solution is arranged on the secondary sedimentation tank (3); the bottoms of the primary sedimentation tank (2), the secondary sedimentation tank (3) and the treated liquid collection tank (4) are all connected by pipelines (30); and all pipelines (30) are connected to a filter press (5).

2. A kettle type foaming wastewater recycling device according to claim 1, characterized in that: A stirrer (7) is provided in the wastewater collection tank (1).

3. A kettle type foaming wastewater recycling device according to claim 1, characterized in that: The wastewater collection tank (1), the primary sedimentation tank (2), and the secondary sedimentation tank (3) are made of stainless steel.

4. The kettle type foaming wastewater recycling device according to claim 1, characterized in that: The filter element (20) is made of metal.

5. The kettle type foaming wastewater recycling device according to claim 1, characterized in that: The primary sedimentation tank (2) is provided with a jacket, and a cooling medium is placed in the jacket.

6. The kettle type foaming wastewater recycling device according to claim 1, characterized in that: A suction pump (8) is provided between the primary sedimentation tank (2) and the secondary sedimentation tank (3).

7. The kettle type foaming wastewater recycling device according to claim 1, characterized in that: The wastewater collection pool (1) is connected to a wastewater pipe (6).

8. The kettle type foaming wastewater recycling device according to claim 1, characterized in that: The treated liquid collection pool (4) is connected to a purified liquid discharge pipe (10).

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