Oil-water separation and water purification equipment for treating swill liquid phase

Abstract

The invention discloses oil-water separation and water purification equipment for treating a swill liquid phase, and belongs to the technical field of kitchen waste treatment and water treatment. Comprising a pre-treatment module, a core separation module and a deep purification module, the pre-treatment module is used for heating, stirring and separating a swill liquid phase generated by pre-solid-liquid separation treatment, and the core separation module is used for carrying out oil-water separation and sedimentation treatment on liquid treated by the pre-treatment module; the deep purification module is used for purifying the water body treated by the core separation module. Efficient oil-water separation and water purification are achieved through multi-stage cooperative treatment of heating conditioning, rotational flow centrifugation, inclined plate sedimentation and deep purification, equipment modularization integration is achieved, the occupied area is small, regulation and control can be conducted, effluent is stable and reaches the standard, and the device is suitable for the field of kitchen waste treatment.

Description

An equipment for oil-water separation and water purification in the liquid phase of swill treatment. Technical Field

[0001] This invention belongs to the field of food waste treatment and water treatment technology, specifically relating to an equipment for oil-water separation and water purification in the treatment of swill liquid phase. Background Technology

[0002] With the increasing demands for resource recovery and volume reduction of food waste, swill treatment processes typically involve solid-liquid separation through crushing and pressing. However, the resulting liquid phase still contains a large amount of emulsified grease, suspended fine particles, and high concentrations of organic pollutants. Direct discharge of this liquid not only fails to meet standards but also risks impacting subsequent wastewater treatment systems.

[0003] In existing technologies, single gravity sedimentation, air flotation, or simple filtration methods are mostly used for this type of swill liquid phase, which have problems such as low oil-water separation efficiency, poor ability to remove emulsified oil, and unstable effluent quality. At the same time, most of the equipment has single function, low integration, large footprint, and high energy consumption, making it difficult to meet the continuous and stable requirements in actual engineering.

[0004] Therefore, there is an urgent need to provide an integrated device that is compact, has high separation efficiency, operates stably, and can achieve efficient oil-water separation and deep water purification. Summary of the Invention

[0005] The purpose of this invention is to provide an equipment for oil-water separation and water purification in the liquid phase of swill. Through multi-stage synergistic treatment, it achieves efficient removal of grease, suspended solids and pollutants from the liquid phase of swill, thereby obtaining stable and compliant purified water, while improving the integration and modularity of the equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an equipment for oil-water separation and water purification of swill liquid phase, comprising a pretreatment module, a core separation module and a deep purification module 12. The pretreatment module is used to heat and stir the swill liquid phase generated by the pre-solid-liquid separation treatment. The core separation module is used to perform oil-water separation and sedimentation treatment on the liquid after the pretreatment module. The deep purification module is used to purify the water after the core separation module.

[0007] Specifically, the pretreatment module includes a heating tank 1, a heating coil 5, an anchor-type stirring paddle 4, a heating tank cover 2, a liquid outlet 6, and a pump-loaded pipeline 7. The heating coil 5 is insulated and installed on the inner wall of the heating tank 1 and connected to an external heating source. The anchor-type stirring paddle 4 is installed in the center of the heating tank 1 and connected to an external motor. The heating tank cover 2 is installed on the top of the heating tank 1 and has a liquid inlet on it. The liquid outlet 6 is located at the bottom of the heating tank 1 and is connected to the core separation module through the pump-loaded pipeline 7.

[0008] Preferably, the heating coil 5 is a copper dot coil covered with insulation material, and the anchor-type stirring paddle 4 is connected to an external motor through a shaft with low thermal conductivity.

[0009] Preferably, a heating tank support frame 3 is installed at the bottom of the heating tank 1.

[0010] Specifically, the core separation module includes a vertical cyclone centrifuge unit 8, an inclined plate sedimentation unit 15, and an oil-water separation tank 10. The tangential feed inlet of the vertical cyclone centrifuge unit 8 is connected to the pretreatment module. The light phase oil outlet 13 at its top is connected to the oil-water separation tank 10 through the light phase oil outlet pipe 9. The outlet of the heavy phase water outlet 14 at its bottom is located directly above the inclined plate sedimentation unit 15. The sedimentation outlet 16 at the bottom of the inclined plate sedimentation unit 15 is connected to the inlet of the sedimentation outlet pipe 11. The outlet of the sedimentation outlet pipe 11 is located directly above the deep purification module 12.

[0011] Preferably, the vertical cyclone centrifugal unit 8 is a hydrocyclone with a wear-resistant ceramic lining.

[0012] Preferably, the inclined plate settling unit 15 is a box structure with a set of parallel plates placed at an angle of 45° installed on its top and a conical sludge hopper 18 at its bottom. The bottom of the conical sludge hopper is connected to the sludge discharge port 17, and the outlet of the sludge discharge port 17 extends out of the inclined plate settling unit 15.

[0013] Preferably, the inclined plate settling unit 15, the oil-water separation tank 10, and the deep purification module 12 are connected together as an integrated structure.

[0014] Specifically, the deep purification module 12 includes a purification box and electrode plates 19. The top of the purification box is an open structure, and the interior is divided into 5 compartments by 4 vertically placed electrode plates 19. By setting the polarity of the 4 electrode plates 19, the two outermost compartments and the one in the middle are drinking water compartments, and the remaining two compartments are fresh water compartments. A semi-circular groove is provided in the middle of the top of each electrode plate 19. The 5 compartments are connected through the semi-circular grooves. Each compartment has a water outlet pipe at the bottom. The water outlet pipes at the bottom of the three drinking water compartments are connected to the brine outlet pipe 20, and the water outlets at the bottom of the two fresh water compartments are connected to the purified water outlet pipe 21. The outlets of the brine outlet pipe 20 and the purified water outlet pipe 21 are connected to the outside.

[0015] Preferably, it also includes an intelligent control unit. The heating source connected to the heating coil 5, the motor connected to the anchor-type stirring paddle 4, and the pump on the pump-containing conveying pipeline 7 are all connected to the intelligent control unit. Temperature sensors and liquid level sensors are also installed inside the heating tank 1. A flow meter is connected to the pump-containing conveying pipeline 7. Temperature sensors, liquid level sensors, and flow meters are all connected to the intelligent control unit.

[0016] The beneficial effects of this invention are: through multi-stage synergistic treatment, it achieves efficient removal of grease, suspended solids and pollutants from the liquid phase of swill, thereby obtaining stable and compliant purified water, while improving the integration and modularity of the equipment. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a top view of Figure 1; Figure 3 is a schematic diagram of the structure of the vertical cyclone centrifuge unit of the present invention; Figure 4 is a schematic diagram of the connection structure between the inclined plate sedimentation unit and the oil-water separation tank of the present invention; Figure 5 is a left sectional view of Figure 4; Figure 6 is a schematic diagram of the structure of the deep purification module of the present invention from two angles; Figure 7 is a schematic diagram of the structure of the anchor-type stirring paddle of the present invention; Figure 8 is a cross-sectional view of a single electrode plate of the present invention.

[0018] Explanation of reference numerals in the attached diagram: 1-Heating tank; 2-Heating tank cover; 3-Heating tank support frame; 4-Anchor-type stirring paddle; 5-Heating coil; 6-Liquid outlet; 7-Pump-included conveying pipeline; 8-Vertical cyclone centrifuge unit; 9-Light phase oil outlet pipeline; 10-Oil-water separation tank; 11-Settling water outlet pipeline; 12-Deep purification module; 13-Light phase oil outlet; 14-Heavy phase water outlet; 15-Inclined plate settling unit; 16-Settling water outlet; 17-Sludge discharge port; 18-Conical sludge hopper; 19-Electrode plate; 20-Brine outlet pipe; 21-Purified water outlet pipe. Detailed Implementation

[0019] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0020] Example 1: As shown in Figures 1-8, an oil-water separation and water purification device for treating swill liquid phase is an integrated treatment device specifically designed for treating swill liquid phase generated after pre-solid-liquid separation. It includes a pre-treatment module, a core separation module, and a deep purification module 12 connected sequentially through pipelines along the treatment process. The pre-treatment module is used to heat and stir the swill liquid phase generated after pre-solid-liquid separation treatment. The core separation module is used to perform oil-water separation and sedimentation treatment on the liquid after pre-treatment. The deep purification module is used to purify the water after core separation.

[0021] Furthermore, the pretreatment module includes a heating tank 1, a heating coil 5, an anchor-type stirring paddle 4, a heating tank cover 2, a liquid outlet 6, and a pump-loaded pipeline 7. The heating coil 5 is insulated and installed on the inner wall of the heating tank 1 and connected to an external heating source. The anchor-type stirring paddle 4 is installed at the center of the heating tank 1 and connected to an external motor. The heating tank cover 2 is installed on the top of the heating tank 1 and has a liquid inlet on it. The liquid outlet 6 is located at the bottom of the heating tank 1 and is connected to the core separation module through the pump-loaded pipeline 7.

[0022] Furthermore, the heating coil 5 is a copper point coil covered with insulation material, and the anchor-type stirring paddle 4 is connected to an external motor through a shaft with low thermal conductivity. The copper point coil covered with insulation material has better insulation, heat preservation, and conductivity.

[0023] Furthermore, a heating tank support frame 3 is installed at the bottom of the heating tank 1, making the heating tank 1 more securely fixed.

[0024] Furthermore, the core separation module includes a vertical cyclone centrifuge unit 8, an inclined plate sedimentation unit 15, and an oil-water separation tank 10. The tangential feed inlet of the vertical cyclone centrifuge unit 8 is connected to the pretreatment module. The light phase oil outlet 13 at its top is connected to the oil-water separation tank 10 through the light phase oil outlet pipe 9. The outlet of the heavy phase water outlet 14 at its bottom is located directly above the inclined plate sedimentation unit 15. The sedimentation outlet 16 at the bottom of the inclined plate sedimentation unit 15 is connected to the inlet of the sedimentation outlet pipe 11. The outlet of the sedimentation outlet pipe 11 is located directly above the deep purification module 12.

[0025] Furthermore, the vertical cyclone centrifuge unit 8 is a hydrocyclone with a wear-resistant ceramic lining, which provides better centrifugation effect.

[0026] Furthermore, the inclined plate settling unit 15 is a box structure with a set of parallel plates placed at an angle of 45° installed on its top. The inclined plate settling unit 15 is used to perform gravity-enhanced settling separation of the liquid after cyclone separation. A conical sludge hopper 18 is provided at its bottom. The bottom of the conical sludge hopper is connected to the sludge discharge port 17. The outlet of the sludge discharge port 17 extends out of the inclined plate settling unit 15. The accumulated sludge can be discharged through the sludge discharge port 17 in daily life.

[0027] Furthermore, the inclined plate settling unit 15, the oil-water separation tank 10, and the deep purification module 12 are connected together to form an integrated structure, which saves space and has a higher degree of integration.

[0028] Furthermore, the deep purification module 12 includes a purification box and electrode plates 19. The top of the purification box has an open structure, and the interior is divided into 5 compartments by 4 vertically placed electrode plates 19. By setting the polarity of the 4 electrode plates 19, the two outermost compartments and the one in the middle are drinking water compartments, and the remaining two compartments are fresh water compartments. Each electrode plate 19 has a semi-circular groove in the middle of its top, and the 5 compartments are connected through the semi-circular grooves. Each compartment has a water outlet pipe at the bottom. The water outlet pipes at the bottom of the three drinking water compartments are connected to the brine outlet pipes 20, and the water outlets at the bottom of the two fresh water compartments are connected to the purified water outlet pipes 21. The outlets of the brine outlet pipes 20 and the purified water outlet pipes 21 are connected to external pipelines for collection.

[0029] Furthermore, the device also includes an intelligent control unit. The heating source connected to the heating coil 5, the motor connected to the anchor-type stirring paddle 4, and the pump on the pump-containing delivery pipeline 7 are all connected to the intelligent control unit. Temperature sensors and level sensors are also installed inside the heating tank 1. A flow meter is connected to the pump-containing delivery pipeline 7. The temperature sensor, level sensor, and flow meter are all connected to the intelligent control unit. The temperature sensor works in conjunction with the heating coil 5 to maintain the liquid phase temperature in the heating tank 1 within the optimized separation range of 50-70°C, thereby reducing oil viscosity and improving separation conditions. The level sensor controls and monitors the liquid level in the heating tank 1, and the flow meter monitors the flow rate entering the vertical cyclone centrifuge unit 8. Based on feedback data from each sensor, the intelligent control unit adaptively adjusts the power of the heating coil 5, the stirring speed of the anchor-type stirring paddle 4, the working efficiency of the pump in the pump-containing delivery pipeline 7, and so on. Through the control of the intelligent control unit, the device of this invention can be made more intelligent.

[0030] The working principle of this invention is as follows: the swill liquid phase generated after pre-solid-liquid separation enters the heating tank 1 through the inlet of the heating tank cover 2. The swill liquid phase is electromagnetically heated by the heating coil 5 and stirred and separated by the anchor-type stirring paddle 4, which reduces the viscosity of the oil and breaks down part of the emulsion state, creating favorable conditions for subsequent oil-water separation. The heated oil and water enter the vertical cyclone centrifuge unit 8 of the core separation module through the outlet 6 and the pump-containing conveying pipeline 7.

[0031] Under the centrifugal force generated by the high-speed rotation of the vertical cyclone centrifuge unit 8, the less dense oil is discharged from the light phase oil outlet 13 and then enters the oil-water separation tank 10. The denser aqueous phase and fine particles are discharged from the heavy phase water outlet 14 and enter the inclined plate sedimentation unit 15 of the core separation module. The inclined plate sedimentation unit 15 is used to perform gravity-enhanced sedimentation separation on the liquid after cyclone separation. In the inclined plate sedimentation unit 15, the liquid flows slowly along the inclined parallel plates. The suspended particles settle into the conical sludge hopper 18 under the action of gravity and are periodically discharged through the sludge discharge port 17 below the conical sludge hopper 18. The supernatant flows into the deep purification module 12 through the sedimentation outlet 16 above the conical sludge hopper 18 and the sedimentation outlet pipe 11.

[0032] The top of the deep purification module 12 is open, and the sedimentation water flowing from the sedimentation outlet pipe 11 flows into the middle compartment. Because each compartment is connected by a semi-circular groove on the top of the electrode plate 19, it ensures that each compartment receives an equal amount of sedimentation water. By setting the polarity of the four electrode plates 19, the five compartments are divided into three drinking water compartments and two fresh water compartments. The three drinking water compartments adsorb metal ions from the brine into their own compartments. Each compartment has a pipe connected to its bottom, and the wastewater from the three drinking water compartments flows out through the brine outlet pipe 20. The pipes at the bottom of the other two compartments are connected together, and then the fresh water is discharged from the purified water outlet pipe 21. Through the action of the electrode plates 19, the water after oil-water separation and sedimentation treatment is further purified.

[0033] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. An apparatus for oil-water separation and water purification in the treatment of swill liquid phase, characterized in that: It includes a pretreatment module, a core separation module and a deep purification module (12). The pretreatment module is used to heat and stir the swill liquid phase generated by the pre-solid-liquid separation treatment. The core separation module is used to perform oil-water separation and sedimentation treatment on the liquid after the pretreatment module. The deep purification module is used to purify the water after the core separation module.

2. The equipment for oil-water separation and water purification in the treatment of swill liquid phase according to claim 1, characterized in that: The pretreatment module includes a heating tank (1), a heating coil (5), an anchor-type stirring paddle (4), a heating tank cover (2), a liquid outlet (6), and a pump-loaded pipeline (7). The heating coil (5) is insulated and installed on the inner wall of the heating tank (1) and connected to an external heating source. The anchor-type stirring paddle (4) is installed in the center of the heating tank (1) and connected to an external motor. The heating tank cover (2) is installed on the top of the heating tank (1) and has a liquid inlet. The liquid outlet (6) is located at the bottom of the heating tank (1) and is connected to the core separation module through the pump-loaded pipeline (7).

3. The equipment for oil-water separation and water purification of swill liquid phase according to claim 2, characterized in that: The heating coil (5) is a copper dot coil covered with heat-insulating material, and the anchor-type stirring paddle (4) is connected to an external motor through a shaft with low thermal conductivity.

4. The equipment for oil-water separation and water purification of swill liquid phase according to claim 2, characterized in that: The bottom of the heating tank (1) is equipped with a heating tank support frame (3).

5. The equipment for oil-water separation and water purification in the treatment of swill liquid phase according to claim 1, characterized in that: The core separation module includes a vertical cyclone centrifuge unit (8), an inclined plate sedimentation unit (15), and an oil-water separation tank (10). The tangential feed port of the vertical cyclone centrifuge unit (8) is connected to the pretreatment module. The light phase oil outlet (13) at the top of the unit is connected to the oil-water separation tank (10) through the light phase oil outlet pipe (9). The outlet of the heavy phase water outlet (14) at the bottom of the unit is located directly above the inclined plate sedimentation unit (15). The sedimentation outlet (16) at the bottom of the inclined plate sedimentation unit (15) is connected to the inlet of the sedimentation outlet pipe (11). The outlet of the sedimentation outlet pipe (11) is located directly above the deep purification module (12).

6. The equipment for oil-water separation and water purification of swill liquid phase according to claim 5, characterized in that: The vertical cyclone centrifugal unit (8) is a hydrocyclone with a wear-resistant ceramic lining.

7. The equipment for oil-water separation and water purification of swill liquid phase according to claim 5, characterized in that: The inclined plate settling unit (15) is a box structure with a parallel plate group placed at an angle of 45° installed on its top. A conical sludge hopper (18) is provided at its bottom. The bottom of the conical sludge hopper is connected to the sludge discharge port (17), and the outlet of the sludge discharge port (17) extends out of the inclined plate settling unit (15).

8. The equipment for oil-water separation and water purification of swill liquid phase according to claim 5, characterized in that: The inclined plate settling unit (15), oil-water separation tank (10), and deep purification module (12) are connected together as an integrated structure.

9. The equipment for oil-water separation and water purification of swill liquid phase according to claim 1, characterized in that: The deep purification module (12) includes a purification box and an electrode plate (19). The top of the purification box is an open structure. The interior is divided into 5 chambers by 4 vertically placed electrode plates (19). By setting the polarity of the 4 electrode plates (19), the two outermost chambers and the one in the middle are drinking water chambers, and the remaining two chambers are fresh water chambers. A semi-circular groove is provided in the middle of the top of each electrode plate (19). The 5 chambers are connected through the semi-circular groove. Each chamber has a water outlet pipe at the bottom. The water outlet pipes at the bottom of the three drinking water chambers are connected to the brine outlet pipe (20). The water outlets at the bottom of the two fresh water chambers are connected to the purified water outlet pipe (21). The outlets of the brine outlet pipe (20) and the purified water outlet pipe (21) are connected to the outside.

10. The equipment for oil-water separation and water purification of swill liquid phase according to claim 2, characterized in that: It also includes an intelligent control unit. The heating source connected to the heating coil (5), the motor connected to the anchor stirring paddle (4) and the pump on the pump-containing conveying pipeline (7) are all connected to the intelligent control unit. The heating tank (1) is also equipped with a temperature sensor and a liquid level sensor. The pump-containing conveying pipeline (7) is connected to a flow meter. The temperature sensor, liquid level sensor and flow meter are all connected to the intelligent control unit.

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