High-pressure solid-liquid separation device

Abstract

The invention belongs to the technical field of sewage treatment, and discloses a high-pressure solid-liquid separation device which comprises a high-pressure cabin, a feeding pipe, an air guide pipe and a liquid discharge pipe are arranged on the high-pressure cabin, an aeration stirring pipe is arranged in the high-pressure cabin, the air guide pipe is connected with the aeration stirring pipe through a return pipe, and the return pipe is further connected with the liquid discharge pipe. A pressure regulating valve and a first valve are arranged on the air guide pipe, the joint of the return pipe and the air guide pipe is located between the pressure regulating valve and the first valve, a second valve and a third valve are arranged on the return pipe, and the joint of the aeration stirring pipe and the return pipe is located between the second valve and the third valve. The high-pressure solid-liquid separation device provided by the invention solves the problems of difficult viscous solid-liquid separation and low solid residue recovery rate, and can reduce the input of chemicals, reduce the maintenance cost, reduce pollution sources, improve the production environment and reduce the labor intensity.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a high-pressure solid-liquid separation device. Background Art

[0002] The existing solid-liquid separation technologies are mainly the following:

[0003] 1. Dry-wet separators and spiral stackers cannot perform solid-liquid separation on viscous materials and tiny suspended solids in liquids. Usually, the solid residue recovery rate is only about 30% after solid-liquid separation, and 70% remains in the liquid, which increases the difficulty and cost of subsequent treatment. During use, a large amount of odor and secondary pollution caused by mosquitoes and flies is generated, which usually requires the addition of chemicals for treatment.

[0004] 2. Filter presses and belt filter presses are unable to separate viscous materials and tiny suspended solids and dissolved matter in liquids. When handling sludge and sludge, the conveyor belts are easily damaged, resulting in high replacement and maintenance costs. They also generate a large amount of odor and secondary pollution from mosquitoes and flies during use. They are unable to handle liquids with high water content and usually require chemical agents.

[0005] 3. MBR membrane and filter material cannot handle viscous materials. They are easy to get clogged during the treatment process. The blockage needs to be cleaned, the maintenance cost is high, and the treatment is labor-intensive. Summary of the Invention

[0006] The present invention aims to solve the above technical problems at least to a certain extent. To this end, the present invention aims to provide a high-pressure solid-liquid separation device.

[0007] The technical solution adopted in the present invention is:

[0008] A high-pressure solid-liquid separation device includes a high-pressure chamber, which is provided with a feed pipe, an air guide pipe and a drain pipe. An aeration and stirring pipe is provided inside the high-pressure chamber. The air guide pipe is connected to the aeration and stirring pipe through a return pipe. The return pipe is also connected to the drain pipe. A pressure regulating valve and a first valve are provided on the air guide pipe. The connection between the return pipe and the air guide pipe is located between the pressure regulating valve and the first valve. A second valve and a third valve are provided on the return pipe. The connection between the aeration and stirring pipe and the return pipe is located between the second valve and the third valve.

[0009] Preferably, the inlet of the feed pipe is connected to the sewage collection tank, and at least one feed pipe is provided with at least one one-way valve, which includes a one-way valve coaxially arranged with the feed pipe and a one-way valve eccentrically arranged with the feed pipe.

[0010] Preferably, the high-pressure chamber is provided with at least one slag discharge pipe. The air guide pipe, slag discharge pipe and liquid discharge pipe are all provided with pressure regulating valves.

[0011] Preferably, the slag discharge pipe is provided with a sewage power pump.

[0012] Preferably, the high-pressure chamber is provided with a series-parallel connector for connecting multiple high-pressure chambers.

[0013] Preferably, at least one feed pump is provided on the feed pipe.

[0014] Preferably, at least one gas collecting cabin is protruding from the hyperbaric cabin, and the air duct is arranged on the gas collecting cabin.

[0015] Preferably, a vibrator may or may not be provided in the hyperbaric chamber.

[0016] The beneficial effects of the present invention are:

[0017] The high-pressure solid-liquid separation device provided by the present invention solves the problems of difficult solid-liquid separation of viscous substances and liquid micro-suspended dissolved substances and low solid residue recovery rate. It does not require the input of chemicals, reduces maintenance costs, reduces pollution sources, improves the production environment, and reduces labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the high-pressure solid-liquid separation device in Example 1 of the present invention.

[0019] Figure 2 It is a schematic diagram of the high-pressure solid-liquid separation device in Example 2 of the present invention.

[0020] Figure 3 It is a schematic diagram of the high-pressure solid-liquid separation device in Example 3 of the present invention.

[0021] Figure 4 It is a schematic diagram of the high-pressure solid-liquid separation device in Example 4 of the present invention.

[0022] Figure 5 It is a schematic diagram of the high-pressure solid-liquid separation device in Example 5 of the present invention.

[0023] Figure 6 It is a schematic diagram of the high-pressure solid-liquid separation device in Example 6 of the present invention.

[0024] In the figure: 1-high-pressure chamber; 2-feed pipe; 3-air guide pipe; 4-drain pipe; 5-slag discharge pipe; 6-aeration and stirring pipe; 7-reflux pipe; 8-pressure regulating valve; 9-first valve; 10-second valve; 11-third valve; 12-sewage collecting tank; 13-one-way valve; 14-series-parallel connector; 15-gas collecting chamber; 16-sewage power pump; 17-feed pump; 18-vibrator; 201-first feed pipe section; 202-second feed pipe section; 203-third feed pipe section. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention and are not to be construed as limiting the present invention. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0026] In the present invention, unless otherwise clearly specified and limited, terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the internal parts of two components.

[0027] Example 1

[0028] like Figure 1 As shown, a high-pressure solid-liquid separation device of this embodiment includes a nearly closed high-pressure chamber 1, on which a feed pipe 2, an air pipe 3 and a drain pipe 4 are provided. An aeration and stirring pipe 6 is provided near the inner bottom of the high-pressure chamber 1. The air pipe 3 is connected to the aeration and stirring pipe 6 through a return pipe 7. The return pipe 7 is also connected to the drain pipe 4. A pressure regulating valve 8 and a first valve 9 are provided on the air pipe 3. The connection between the return pipe 7 and the air pipe 3 is located between the pressure regulating valve 8 and the first valve 9. A second valve 10 and a third valve 11 are provided on the return pipe 7. The connection between the aeration and stirring pipe 6 and the return pipe 7 is located between the second valve 10 and the third valve 11.

[0029] The inlet of the feed pipe 2 is connected to a sewage collection tank 12. A one-way valve 13 is installed on the feed pipe 2. This one-way valve 13 includes one coaxially arranged with the feed pipe 2 and one off-axis arranged with the feed pipe 2. A slag discharge pipe 5 is installed on the high-pressure chamber 1. Pressure regulating valves 8 are installed on the air guide pipe 3, the slag discharge pipe 5, and the liquid discharge pipe 4. A sewage power pump 16 is installed on the slag discharge pipe 5.

[0030] The working process and principle of the high-pressure solid-liquid separation device of this embodiment are as follows:

[0031] 1. Sewage sludge is collected in a sewage collection tank 12, fed through a feed pipe 2 to a one-way valve 13, and then enters a high-pressure chamber 1 for fermentation. Solid residue and tiny suspended matter are squeezed by high pressure, causing the residue to settle to the bottom of the tank. The high pressure also opens the pressure-regulating valves 8 on the slag discharge pipe 5, the liquid discharge pipe 4, and the exhaust pipe 3, allowing the sediment to be discharged through the slag discharge pipe 5, the biogas to be discharged through the liquid discharge pipe 4, and the exhaust pipe. Continuous feeding and continuous discharge of residue, liquid, and gas.

[0032] 2. When feeding is stopped during the treatment process, the sewage in high-pressure chamber 1 is under the high pressure of the fermentation gas, or when treating non-gas-producing sewage to ensure high-pressure gas replenishment and pressure maintenance, the sewage flows back through feed pipe 2, and the check valve 13 closes to prevent sewage from flowing back into the high-pressure chamber. Check valve 13, three pressure regulating valves 8, and high-pressure chamber 1 form a high-pressure enclosed space. The three pressure regulating valves are set to the same pressure value, ensuring a constant pressure at the set operating pressure of high-pressure chamber 1, allowing for continuous feeding and discharge.

[0033] 3. After the liquid generated during the treatment process enters the drain pipe 4, the high pressure pushes open the pressure regulating valve 8 on the drain pipe 4, and the liquid is discharged from the drain pipe 4.

[0034] 4. Gas generated during the treatment process enters the air duct 3. The high-pressure gas pushes open the pressure regulating valve 8 on the air duct 3, closing the second valve 10. The gas is then discharged through the first valve 9 for resource utilization. The first and third valves 9 and 11 are closed, and the second valve 10 is opened. The gas is then transported through the return pipe 7 to the aeration and stirring pipe 6 to agitate the sediment. The second valve 10 is closed, and the third valve 11 is opened. A portion of the biogas slurry from the drainage pipe 4 is pumped through the return pipe 7 to the aeration and stirring pipe 6 to agitate the sediment. The aeration and stirring pipe 6 utilizes biogas and biogas slurry for agitation, which is more energy-efficient.

[0035] The hyperbaric chamber 1 is equipped with a series-parallel connector 14 that communicates with the interior of the chamber 1. Depending on the treatment capacity, one, two, or more hyperbaric chambers 1 can be connected in series or parallel. Pipes and fittings are used to connect the series-parallel connectors 14 of different hyperbaric chambers, enabling interconnection of the hyperbaric chambers 1 to meet the requirements of different daily sewage treatment volumes. To save land and improve land utilization, multiple units are designed as an integrated device.

[0036] This high-pressure solid-liquid separation device solves the problem of solid-liquid separation of viscous materials, which is often difficult to handle with existing dry-wet separators, screw stacks, filter presses, belt filter presses, MBK membranes, and filter media. It is suitable for solid-liquid separation of various liquids, such as aquaculture wastewater, restaurant waste, domestic sewage, industrial wastewater, viscous sewage, sludge, and biogas residue. It also features a simple process, safety, environmental protection, energy conservation, and high efficiency.

[0037] Example 2

[0038] like Figure 2 As shown, a high-pressure solid-liquid separation device of this embodiment is based on the first embodiment, in which a gas collecting cabin 15 is protruded from the high-pressure cabin 1 , and the air guide pipe 3 is provided on the gas collecting cabin 15 .

[0039] Example 3

[0040] like Figure 3As shown, a high-pressure solid-liquid separation device of this embodiment differs from the first embodiment in that the feed pipe of this embodiment includes a first feed pipe section 201, a second feed pipe section 202, and a third feed pipe section 203 connected in sequence, a one-way valve 13 is provided on the second feed pipe section 202, the inlet of the first feed pipe section 201 is connected to the sewage collection tank 12, and the outlet of the third feed pipe section 203 is located in the high-pressure chamber 1. A feed pump 17 is provided on each of the first feed pipe section 201 and the third feed pipe section 203. After the sewage is collected in the sewage collection tank 12, the feed pumps on the first feed pipe section 201 and the third feed pipe section 203 are turned on. The feed pumps can break up the coarse residue in the sewage and pass it into the high-pressure chamber 1 through the first feed pipe section 201, the second feed pipe section 202, and the third feed pipe section 203 in sequence.

[0041] Example 4

[0042] like Figure 4 As shown, a high-pressure solid-liquid separation device of this embodiment is based on the third embodiment, in which a gas collecting cabin 15 is protruded from the high-pressure cabin 1 , and the air guide pipe 3 is provided on the gas collecting cabin 15 .

[0043] Example 5

[0044] like Figure 5 As shown, a high-pressure solid-liquid separation device of this embodiment is based on the first embodiment, and the aeration stirring pipe 6, the reflux pipe 7, the first valve 9, the second valve 10 and the third valve 11 are cancelled, and the other parts remain unchanged.

[0045] Example 6

[0046] like Figure 6 As shown, a high-pressure solid-liquid separation device of this embodiment is provided with a vibrator 18 on the basis of the fifth embodiment to accelerate the gas-liquid separation and the slag descending progress.

[0047] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, any technical solution that falls within the scope defined by the claims of the present invention falls within the scope of protection of the present invention.

Claims

1. A high-pressure solid-liquid separation device, characterized in that: The invention comprises a high-pressure chamber (1), wherein the high-pressure chamber (1) is provided with a feed pipe (2), an air guide pipe (3) and a liquid discharge pipe (4); an aeration stirring pipe (6) is installed or not installed inside the high-pressure chamber (1); the air guide pipe (3) is connected to the aeration stirring pipe (6) via a return pipe (7); the return pipe (7) is also connected to the liquid discharge pipe (4); a pressure regulating valve (8) and a first valve (9) are provided on the air guide pipe (3); the connection between the return pipe (7) and the air guide pipe (3) is located between the pressure regulating valve (8) and the first valve (9); a second valve (10) and a third valve (11) are provided on the return pipe (7); the connection between the aeration stirring pipe (6) and the return pipe (7) is located between the second valve (10) and the third valve (11).

2. The high-pressure solid-liquid separation device according to claim 1, characterized in that: The inlet of the feed pipe (2) is connected to the sewage collecting tank (12), and at least one one-way valve (13) is provided on at least one feed pipe (2).

3. The high-pressure solid-liquid separation device according to claim 1, characterized in that: The one-way valve (13) includes a one-way valve (13) coaxially arranged with the feed pipe (2) and a one-way valve (13) eccentrically arranged with the feed pipe (2).

4. The high-pressure solid-liquid separation device according to claim 1, characterized in that: The high-pressure chamber (1) is provided with at least one slag discharge pipe (5).

5. The high-pressure solid-liquid separation device according to claim 4, characterized in that: The air guide pipe (3), the slag discharge pipe (5) and the liquid discharge pipe (4) are all provided with a pressure regulating valve (8).

6. The high-pressure solid-liquid separation device according to claim 4, characterized in that: The slag discharge pipe (5) is provided with a sewage power pump (16).

7. The high-pressure solid-liquid separation device according to claim 1, characterized in that: The high-pressure chamber (1) is provided with a series-parallel connector (14) for connecting multiple high-pressure chambers (1).

8. The high-pressure solid-liquid separation device according to claim 1, characterized in that: At least one feed pump (17) is provided on the feed pipe (2).

9. The high-pressure solid-liquid separation device according to claim 1, characterized in that: At least one gas collecting cabin (15) is protrudingly provided on the high-pressure cabin (1), and the air guide pipe (3) is provided on the gas collecting cabin (15).

10. The high-pressure solid-liquid separation device according to claim 1, characterized in that: The hyperbaric chamber (1) may or may not be provided with a vibrator.

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