Thickening and separating integrated device

Abstract

The utility model provides a thickening and separating integrated device, and belongs to the technical field of wastewater treatment. The device comprises a tank body and a demister, wherein the tank body comprises an upper tank body and a lower tank body; a sludge slurry feeding hole is formed in the lower part of the upper tank body, a steam outlet is formed in the top of the upper tank body, the steam outlet is connected with a steam conveying pipe, and a water circulation type vacuum pump is arranged on the steam conveying pipe; the demister is arranged at the upper part of the upper tank body and is a transverse plate with steam holes; steam is formed among the sludge slurry feeding hole, the steam hole and the steam outlet to form a continuous passage for re-discharging; the lower tank body is arranged below the upper tank body, the bottom of the upper tank body is communicated with the lower tank body through a downcomer, the downcomer extends towards the lower part of the lower tank body, the upper part of the lower tank body is provided with a circulating outlet, the circulating outlet is connected with the upper tank body through a circulating pipe, and the circulating pipe is provided with a sludge circulating pump; a thick slurry outlet is formed in the lower part of the lower tank body. And the sludge thickening separation efficiency and quality in the wastewater treatment process are effectively ensured.

Description

Technical Field

[0001] The present invention specifically relates to an integrated device for enrichment and separation, and specifically relates to an integrated device for vacuum enrichment and separation circulation of wastewater, belonging to the technical field of wastewater treatment. Background Art

[0002] With the continuous development of social economy, the population has reached a new height, and the amount of sewage discharged has also continued to increase. Industrial development and people's lives will produce sewage. If these sewage is not discharged and treated properly, it will cause great environmental pollution. At present, for the treatment of industrial sewage and domestic sewage, they are generally collected and placed in sedimentation tanks, and flocculants and other agents are added for precipitation. In this process, a large amount of sludge and supernatant with a water content of 70-90% is formed. Then, the supernatant is adjusted to pH value, remove metal ions, remove microorganisms, etc. according to the test results; for sludge, it is squeezed and dehydrated to form dry mud, and then landfilled, or burned, or used for construction, or used as fertilizer, etc.

[0003] Since the sludge discharged from the sedimentation tank has a very high water content, it places strict requirements on the press, resulting in low efficiency and high energy consumption in the pressing process.

[0004] Although the prior art CN111330301A discloses "a fully automatic integrated concentrating and crystallizing machine for highly viscous materials and its process", CN203458811U discloses "a steam recompression evaporation concentration device", CN107008024A discloses "a process structure of an integrated evaporation tower capable of energy-saving and efficient acquisition of pure steam", and CN213220962U discloses "an integrated forced circulation evaporation separator", etc., none of them effectively solves the problem of low efficiency and high energy consumption of the sludge pressing process formed in the sewage treatment process. Summary of the invention

[0005] In order to overcome the shortcomings of the prior art, a thickening and separation integrated device is proposed. In this technical solution, through the setting of this device, the sewage sedimentation tank and the press are well connected to achieve the orderliness, high efficiency and stability of sludge treatment.

[0006] In order to achieve the above technical objectives, the following technical solutions are proposed:

[0007] A concentrated separation integrated device is arranged between a sewage sedimentation tank and a press, the concentrated separation integrated device comprises a tank body and a defoamer arranged in the tank body, the tank body comprises an upper tank body and a lower tank body;

[0008] A sludge feed port is provided at the lower part of the upper tank body, and a steam outlet is provided at the top of the upper tank body. The steam outlet is connected to a steam delivery pipe, and a water circulation vacuum pump is provided on the steam delivery pipe. A demister is provided at the upper part of the upper tank body, and the demister is a horizontal plate with steam holes. A thin liquid phase area is formed between the tangent line of the sludge feed port and the bottom end of the upper tank body, a steam-foam area is formed between the tangent line of the sludge feed port and the demister, and a steam area is formed between the demister and the top end of the upper tank body. That is, the tangent line of the sludge feed port and the demister divide the upper tank body into three areas, which are the thin liquid phase area, the steam-foam area and the steam area from bottom to top. A continuous passage for steam formation and discharge is formed between the sludge feed port, the steam hole and the steam outlet.

[0009] The lower tank body is arranged below the upper tank body, the bottom of the upper tank body is connected with the lower tank body through a downcomer, and the downcomer extends to the lower part of the lower tank body, and a concentrated liquid phase area is formed between the outer wall of the downcomer and the inner wall of the lower tank body; a circulation outlet is provided at the upper part of the lower tank body, and the circulation outlet is connected with the upper tank body through a circulation pipe, and a sludge circulation pump is provided on the circulation pipe; a concentrated sludge outlet is provided at the lower part of the lower tank body.

[0010] Furthermore, a drain valve interface and a safety valve interface are also provided on the top of the upper tank body.

[0011] Furthermore, the top of the upper tank body is arranged in an arc shape, which effectively increases the area of ​​the steam zone, provides a larger buffer space for the steam, and ensures the stable discharge of the steam; the bottom of the upper tank body is arranged in a cone shape, which can effectively ensure that the thin liquid phase in the thin liquid phase zone is discharged into the lower tank body, thereby achieving the stability of the discharge of the thin liquid phase.

[0012] Furthermore, a reflux pipe is provided between the upper tank body and the lower tank body, and a control valve is provided on the reflux pipe.

[0013] Furthermore, there are 8 to 12 reflux pipes, which are distributed in a ring shape outside the tank body.

[0014] Furthermore, the upper tank body is fixedly arranged on the lower tank body.

[0015] Furthermore, there are multiple steam holes evenly distributed on the transverse plate.

[0016] Furthermore, the diameter of the steam hole is 35-45 mm.

[0017] Furthermore, the downcomer is arranged in the axial direction of the lower tank body.

[0018] Furthermore, the downcomer discharge port is provided with an inverted trumpet-shaped discharge pipe to ensure that the thin liquid phase in the thin liquid phase region can be discharged smoothly and stably.

[0019] Furthermore, the bottom of the lower tank body is arranged in a conical shape, which can ensure that the concentrated liquid phase in the concentrated liquid phase area is discharged stably and completely.

[0020] Furthermore, an arc-shaped sealing head is provided at the bottom end of the lower tank body, and the arc-shaped sealing head is connected to a sewage pipe to effectively discharge the sewage deposited in the concentrated liquid phase area.

[0021] Furthermore, the lower tank body is arranged on a bracket.

[0022] The relationships involved in this technical solution, such as "inside", "lower", "top", "upper", "between", "top", "below", "bottom", "outside", "outside", and "upper", are defined according to the situations under actual usage conditions and are conventional terms in this technical field, as well as conventional terms used by technical personnel in this field in actual usage.

[0023] The beneficial technical effects brought about by adopting this technical solution are:

[0024] The utility model has a simple structure and an ingenious design. It can effectively remove moisture from sludge (water content 70-90%), discharge the moisture in the sludge in the form of steam while achieving sludge concentration, and can better connect the sewage sedimentation tank and the press to achieve orderly, efficient and stable sludge treatment, etc., providing an effective prerequisite for environmentally friendly treatment of industrial and domestic sewage.

[0025] Among them, the arrangement of thin liquid phase area, steam foam area, steam area and concentrated liquid phase area ensures the orderliness, stability and controllability of the sludge thickening and separation process;

[0026] The arrangement of the sludge feed inlet, steam holes and steam outlet ensures that a continuous passage for steam generation and discharge is formed between the sludge feed inlet, steam holes and steam outlet;

[0027] In addition, the arrangement of the downcomer, circulation outlet and thick sludge outlet enhances the sludge thickening and separation effect, and at the same time ensures the orderly discharge of the sludge after thickening (water removal) for further treatment such as squeezing. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model;

[0029] Figure 2 It is a cross-sectional view of the utility model;

[0030] Figure 3 It is a top view of the utility model;

[0031] Among them, in the figure: 1, upper tank body, 1.1, sludge slurry feed inlet, 1.2, steam outlet, 1.3, drain valve interface, 1.4, safety valve interface, 1.5, demister, 2, lower tank body, 2.1, circulation outlet, 2.2, thick sludge outlet, 2.3, arc head, 3, thin liquid phase area, 4, steam foam area, 5, steam area, 6, sludge slurry feed inlet tangent, 7, downcomer, 8, reflux pipe, 9, control valve, 10, discharge pipe, 11, bracket, 12, sewage pipe, 13, thick liquid phase area. DETAILED DESCRIPTION

[0032] The following is a clear and complete description of the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Example 1

[0034] This embodiment provides: a concentrated separation integrated device, which is arranged between a sewage sedimentation tank and a press, and the concentrated separation integrated device comprises a tank body and a defoamer 1.5 arranged in the tank body, such as Figure 1-2 As shown, the tank body includes an upper tank body 1 and a lower tank body 2;

[0035] A sludge feed port 1.1 is provided at the lower part of the upper tank body 1, and a steam outlet 1.2 is provided at the top of the upper tank body 1. The steam outlet 1.2 is connected to a steam delivery pipe, and a water circulation vacuum pump (for exhausting air) is provided on the steam delivery pipe; a demister 1.5 is provided at the upper part of the upper tank body 1, and the demister 1.5 is a horizontal plate with steam holes; a thin liquid phase area 3 is formed between the tangent line 6 of the sludge feed port and the bottom end of the upper tank body 1, a steam-foam area 4 is formed between the demister 1.5 and the top end of the upper tank body 1, that is, the tangent line 6 of the sludge feed port and the demister 1.5 divide the upper tank body 1 into three areas, which are the thin liquid phase area 3, the steam-foam area 4 and the steam area 5 from bottom to top. A continuous passage for steam formation and discharge is formed between the sludge feed port 1.1, the steam hole and the steam outlet 1.2;

[0036] The lower tank body 2 is arranged below the upper tank body 1, and the bottom of the upper tank body 1 is connected to the lower tank body 2 through a downcomer 7, and the downcomer 7 extends to the lower part of the lower tank body 2, and a concentrated liquid phase area 13 is formed between the outer wall of the downcomer 7 and the inner wall of the lower tank body 2; a circulation outlet 2.1 is provided at the upper part of the lower tank body 2, and the circulation outlet 2.1 is connected to the upper tank body 1 through a circulation pipe (preferably, the circulation outlet 2.1 is connected to the thin liquid phase area 3 of the upper tank body 1 through a circulation pipe), and a sludge circulation pump is provided on the circulation pipe; a concentrated sludge outlet 2.2 is provided at the lower part of the lower tank body 2.

[0037] The work processes involved include:

[0038] 1. The sludge (water content 70-90%) discharged from the sewage sedimentation tank is introduced into the upper tank body 1. Under the action of the water circulation vacuum pump, droplets are formed in the vapor foam area 4. The droplets are then separated into water vapor and liquid droplets by the demister 1.5. The water circulation vacuum pump continuously extracts the water (especially steam) in the sludge, and the negative pressure is controlled at a vacuum degree of 20-40kpa.

[0039] Second, at the same time, the droplets in the vapor-foam area 4 return to the thin liquid phase area 3, and the water vapor formed is extracted from the steam outlet 1.2. After the water vapor is extracted, the sludge in the tank is concentrated, which is convenient for subsequent squeezing treatment;

[0040] 3. After being concentrated to a certain extent, the sludge slurry also enters the lower tank body 2 through the downcomer 7 (the downcomer 7 connects the thin liquid phase area 3 and the concentrated liquid phase area 13), and returns to the upper tank body 1 through the circulation outlet 2.1, so as to realize the recirculation and concentration of the sludge slurry. Similarly, water in the sludge slurry is removed in the form of water vapor until the sludge slurry reaches the preset discharge requirements (such as: the water content is 20-30%), and is discharged through the concentrated sludge outlet 2.2.

[0041] Example 2

[0042] On the basis of Example 1, this example further defines the upper tank body 1 to further illustrate the technical solution.

[0043] The top of the upper tank body 1 is arranged in an arc shape, which effectively increases the area of ​​the steam zone 5, provides a larger buffer space for the steam, and ensures the stable discharge of the steam; the bottom of the upper tank body 1 is arranged in a conical shape, which can effectively ensure that the thin liquid phase in the thin liquid phase zone 3 is discharged into the lower tank body 2, thereby achieving the stability of the discharge of the thin liquid phase.

[0044] The top of the upper tank body 1 is also provided with an exhaust valve interface 1.3 and a safety valve interface 1.4.

[0045] Example 3

[0046] On the basis of Embodiments 1-2, this embodiment further limits the arrangement between the upper tank body 1 and the lower tank body 2 to further illustrate the technical solution.

[0047] A reflux pipe 8 is provided between the upper tank body 1 and the lower tank body 2, and a control valve 9 is provided on the reflux pipe 8. Preferably, there are 8 to 12 reflux pipes 8, and the reflux pipes 8 are distributed in a ring shape outside the tank body. The reflux pipes 8 are evenly distributed outside the tank body, and the droplets formed by evaporation are returned to the concentrated liquid phase area 13 by gravity, and together with the concentrated sludge flowing down the downcomer 7, they are pumped back to the thin liquid phase area 3 of the upper tank body 1 through the sludge circulation pump, and then subjected to the negative pressure vacuum action, the negative pressure vacuum vaporization and concentration are performed again.

[0048] The upper tank body 1 is fixedly arranged on the lower tank body 2, so as to improve the integrity of the integrated device, and further improve the stability and effectiveness of the enrichment and separation process.

[0049] Example 4

[0050] On the basis of Examples 1-3, this Example further defines the demister 1.5 to further illustrate the technical solution.

[0051] The demister 1.5 is a horizontal plate with steam holes. There are multiple steam holes evenly distributed on the horizontal plate. The diameter of the steam holes is 35-45 mm.

[0052] Example 5

[0053] On the basis of Examples 1-4, this example further defines the downcomer 7 to further illustrate the technical solution.

[0054] The downcomer 7 is arranged in the axial direction of the lower tank body 2, and the discharge port of the downcomer 7 is provided with a discharge pipe 10 in the shape of an inverted trumpet, so as to ensure that the thin liquid phase in the thin liquid phase area 3 can be discharged smoothly and stably.

[0055] Example 6

[0056] On the basis of Examples 1-5, this example further defines the lower tank body 2 to further illustrate the technical solution.

[0057] The bottom of the lower tank body 2 is set in a conical shape, which can ensure that the concentrated liquid phase in the concentrated liquid phase area 13 is discharged stably and completely; the bottom end of the lower tank body 2 is provided with an arc-shaped head 2.3, and the arc-shaped head 2.3 is connected to the sewage pipe 12 to effectively discharge the sewage deposited in the concentrated liquid phase area 13. In addition, the lower tank body 2 is set on the bracket 11 (such as Figure 3 as shown).

[0058] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An integrated enrichment and separation device, characterized in that: Arranged between the sewage sedimentation tank and the press, the integrated concentration and separation device comprises a tank body and a defoamer (1.5) arranged in the tank body, wherein the tank body comprises an upper tank body (1) and a lower tank body (2); A sludge feed inlet (1.1) is provided at the lower part of the upper tank body (1), a steam outlet (1.2) is provided at the top of the upper tank body (1), the steam outlet (1.2) is connected to a steam delivery pipe, and a water circulation type vacuum pump is provided on the steam delivery pipe; a demister (1.5) is provided at the upper part of the upper tank body (1), the demister (1.5) is a horizontal plate with steam holes; a thin liquid phase region (3) is formed between a tangent line (6) of the sludge feed inlet and the bottom end of the upper tank body (1), a steam-foam region (4) is formed between the tangent line (6) of the sludge feed inlet and the demister (1.5), a steam region (5) is formed between the demister (1.5) and the top end of the upper tank body (1), and a continuous passage for steam formation and discharge is formed between the sludge feed inlet (1.1), the steam holes and the steam outlet (1.2); The lower tank body (2) is arranged below the upper tank body (1); the bottom of the upper tank body (1) is connected to the lower tank body (2) via a downcomer (7); the downcomer (7) extends to the lower part of the lower tank body (2); a concentrated liquid phase region (13) is formed between the outer wall of the downcomer (7) and the inner wall of the lower tank body (2); a circulation outlet (2.1) is provided at the upper part of the lower tank body (2); the circulation outlet (2.1) is connected to the upper tank body (1) via a circulation pipe; a sludge circulation pump is provided on the circulation pipe; and a concentrated sludge outlet (2.2) is provided at the lower part of the lower tank body (2).

2. The enrichment and separation integrated device according to claim 1, characterized in that: The top of the upper tank body (1) is also provided with a drain valve interface (1.3) and a safety valve interface (1.4).

3. The enrichment and separation integrated device according to claim 1, characterized in that: The top of the upper tank body (1) is arranged in an arc shape, and the bottom of the upper tank body (1) is arranged in a conical shape.

4. The enrichment and separation integrated device according to claim 1, characterized in that: A reflux pipe (8) is provided between the upper tank body (1) and the lower tank body (2), and a control valve (9) is provided on the reflux pipe (8).

5. The enrichment and separation integrated device according to claim 4, characterized in that: There are 8 to 12 return pipes (8), which are distributed in a ring shape outside the tank body.

6. The enrichment and separation integrated device according to any one of claims 1 to 5, characterized in that: The upper tank body (1) is fixedly arranged on the lower tank body (2).

7. The enrichment and separation integrated device according to claim 1, characterized in that: There are multiple steam holes evenly distributed on the transverse plate, and the diameter of the steam holes is 35-45 mm.

8. The enrichment and separation integrated device according to claim 1, characterized in that: The downcomer (7) is arranged in the axial direction of the lower tank body (2), and the discharge port of the downcomer (7) is provided with a discharge pipe (10) in the shape of an inverted trumpet.

9. The enrichment and separation integrated device according to claim 1, characterized in that: The bottom of the lower tank body (2) is arranged in a conical shape, and an arc-shaped sealing head (2.3) is arranged at the bottom end of the lower tank body (2), and the arc-shaped sealing head (2.3) is connected to a sewage discharge pipe (12).

10. The enrichment and separation integrated device according to claim 1 or 9, characterized in that: The lower tank body (2) is arranged on a bracket (11).

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