Grease recovery mechanism based on carbonized wool wastewater treatment

Abstract

The invention relates to the technical field of wastewater treatment, in particular to a grease recovery mechanism based on carbonized wool wastewater treatment. The device comprises a centrifugal separator and a heating tank body connected with a material inlet of the centrifugal separator, and further comprises a wastewater dewatering mechanism connected with a material inlet of the heating tank body. Wastewater flows into the inner side of the grease-proof permeable membrane, water seeps out by means of liquid level static pressure when the wastewater stays through the synergistic effect of the grease-proof permeable membrane and the water-permeable filter screen, and after the shielding table is controlled by the control part to move upwards, local high pressure is formed by a narrow channel between the shielding table and the grease-proof permeable membrane through flowing resistance, so that the water-permeable filter screen is blocked. The rotary centrifugal force and the dynamic water pressure are combined, so that part of water in the wastewater passing through the inner-layer tank body is removed, the water content of the wastewater is remarkably reduced, the fat concentration is improved, the subsequent centrifugal separation frequency is reduced, and the wool fat recovery efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to an oil recovery mechanism based on the treatment of carbonized wool wastewater. Background Technology

[0002] Carbonized wool is a process that removes plant-based cellulose substances from wool by combining chemical methods with mechanical treatment, taking advantage of the fact that wool is acid-resistant while plant-based fibers are not. During the carbonized wool processing, the wool also needs to undergo a shredding process. Lanolin is a secreted oil that adheres to the wool; it is a pale yellow or brownish-yellow ointment that is sticky and slippery, with a faint but distinctive odor, and it dissolves into the wastewater during shredding.

[0003] After wool is washed and discharged, lanolin is recovered from the wastewater. Currently, traditional centrifugation and extraction methods are commonly used both domestically and internationally.

[0004] Centrifugation is a method that uses high-speed centrifuges to separate lanolin from wastewater. Currently, disc centrifuges are mainly used for separation. Before centrifugation, the scouring wastewater needs to be treated and heated.

[0005] Before entering the separator, wool scouring wastewater needs to be separated by sedimentation to remove larger suspended particles, and then heated before entering the centrifuge to separate the aqueous phase, oil phase, and sludge phase. However, since the suitable lipid concentration for centrifugal separation is generally above 15 g / L, and the recovery rate of lanolin will decrease when the concentration is below 10 g / L, and the treatment process for lanolin-containing wastewater generally cannot help increase the lipid concentration in the waste liquid, the oil phase needs to be heated again after recovery for oil-water separation to obtain crude lanolin, which affects the lanolin recovery efficiency. Summary of the Invention

[0006] This invention provides an oil recovery mechanism based on the treatment of carbonized wool wastewater. After the sedimentation step is completed, the wastewater is introduced into a treatment tank, and the water content in the wastewater is removed by a rotary seepage method, thereby increasing the oil concentration of the wastewater and solving the problems mentioned in the background art. When separating waste liquid with a low lipid concentration, the recovery rate of lanolin will be reduced. This means that after the separated oil phase is recovered, it needs to be heated again for oil-water separation to obtain crude lanolin, resulting in low recovery efficiency.

[0007] To achieve the above objectives, the present invention provides an oil recovery mechanism based on carbonized wool wastewater treatment, including a centrifuge and a heating tank connected to the inlet of the centrifuge, and a wastewater removal mechanism connected to the inlet of the heating tank. The wastewater removal mechanism includes an outer tank, an inner tank for introducing wastewater, and a water removal component. The outer tank includes a support frame, a metal shielding tank, and an inner heating element that fits against the inner wall of the shielding tank. The inner tank is disposed inside the shielding tank. The water removal assembly includes a rotary dewatering assembly and a guiding stirring assembly; The rotary dehydration assembly includes a water-permeable filter element arranged along the central axis of the inner tank and a drive element that drives the water-permeable filter element to rotate. The water-permeable filter element includes an anti-grease permeation membrane and a water-permeable filter screen arranged around it, forming an annular water seepage area inside the inner tank. The guiding and stirring component is located below the inner tank and acts on the water seepage area of ​​the anti-grease seepage membrane, forming multiple guiding seepage and static stirring of the wastewater.

[0008] The water-permeable filter also includes a shaped mounting frame, which is installed in the center of the inner tank. A wastewater outlet pipe is provided at the connection between the bottom of the shaped mounting frame and the inner tank. The wastewater outlet pipe is connected to the inlet of the heating tank. The shaped mounting frame is a ring-shaped frame with a rubber ring at the top and a concave metal bottom ring at the bottom. The grease-proof membrane and the water-permeable filter screen are arranged around the outside of the shaped mounting frame. The water-permeable filter is an annular pleated filter, with the inner pleats attached to an anti-grease-permeable membrane. The wastewater inlet on the top wall of the inner tank is located at the center of the anti-grease-permeable membrane, and the bottom of the inner tank is provided with a drain outlet corresponding to the water-permeable filter. The drive component is located at the end of the shielding tank. The output end of the drive component passes through the shielding tank and the top wall of the inner tank and is equipped with a drive vane. The drive vane is tightly fitted with the rubber ring at the top of the shaping and mounting frame to transmit rotational power.

[0009] In this technical solution, the synergistic effect of the anti-grease-permeable membrane and the water-permeable filter, combined with the rotational centrifugal force and dynamic water pressure, removes part of the water from the wastewater passing through the inner tank, significantly reducing the water content of the wastewater, increasing the grease concentration, reducing the number of subsequent centrifugal separations, and improving the efficiency of lanolin recovery.

[0010] As a further improvement to this technical solution, the guiding stirring assembly includes a guiding cone, a shielding platform, a control component, and a stirring component; The shielding platform is located above the connection between the wastewater outlet pipe and the fixed installation frame. The top surface of the shielding platform is conical, and the lower half is cylindrical. The edge of the cylindrical part is attached to the inner wall of the anti-grease penetration membrane. The control component is located at the bottom of the inner tank, and the control end of the control component is connected to the shielding platform, which can control the lifting and lowering of the shielding platform to open and close the wastewater outlet pipe. The stirring component is installed on the top of the shielding platform. The guide cone is fixed to the top of the stirring component and its edge is close to the inner wall of the grease-proof membrane. The stirring component includes a drive motor, a sealing ring, and a stirring frame. The drive motor is located inside the hollow shielding platform. The stirring frame is vertically rotatably installed on the top of the shielding platform and driven by the drive motor. The sealing ring is located at the connection between the stirring frame and the shielding platform. The guide cone is fixedly installed at the end of the stirring frame.

[0011] The stirring rack includes a rotating shaft connected to a drive motor and a stirring slant bar located outside the rotating shaft. The stirring slant bar is located between the shielding platform and the guide cone. This technical solution consists of two steps: static water pressure dewatering and dynamic extrusion dewatering. When the wastewater is stationary, water seeps out by static pressure. When the baffle is moved upward by the control components, the narrow channel between the baffle and the anti-grease membrane uses flow resistance to form local high pressure, further squeezing the wastewater to achieve deep dewatering. Combined with the dynamic design of the rotating anti-grease membrane and the stirring components, it effectively prevents grease from accumulating on the membrane surface, resulting in multiple guided seepage and static liquid stirring of the wastewater.

[0012] Compared with the prior art, the present invention provides an oil recovery mechanism based on the treatment of carbonized wool wastewater, which has the following beneficial effects: This invention allows wastewater to flow into the inner side of an oil-proof membrane. Through the synergistic effect of the oil-proof membrane and the water-permeable filter, water seeps out of the wastewater during its residence time due to hydrostatic pressure. When the baffle is moved upward by the control components, the narrow channel between the baffle and the oil-proof membrane creates local high pressure using flow resistance, further squeezing the wastewater and achieving deep dehydration. Combined with centrifugal force and dynamic water pressure, the wastewater passing through the inner tank loses some of its water content, significantly reducing the water content of the wastewater, increasing the lipid concentration, reducing the number of subsequent centrifugal separations, and improving the efficiency of lanolin recovery.

[0013] In addition, the combined action of the rotating anti-grease membrane, the guide cone, and the agitator can prevent grease from accumulating on the membrane surface, ensuring the efficiency of water seepage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective; Figure 3This is a schematic diagram of the wastewater removal mechanism in this invention; Figure 4 This is a structural distribution diagram of the outer tank, inner tank, and water removal assembly in this invention; Figure 5 This is a structural distribution diagram of the outer tank, inner tank, water-permeable filter, and guiding stirring assembly in this invention; Figure 6 This is a structural distribution diagram of the water-permeable filter element and the guiding stirring assembly in this invention; Figure 7 This is a cross-sectional view of the permeable filter, stirring component, and guiding stirring assembly in this invention.

[0015] In the diagram: 1. Centrifuge; 2. Heating tank; 3. Outer tank; 31. Support frame; 32. Barrier tank; 33. Inner heating element; 4. Inner tank; 5. Water removal assembly; 51. Rotary dewatering assembly; 511. Drive component; 52. Guide stirring assembly; 521. Guide cone; 522. Barrier platform; 523. Control component; 6. Water-permeable filter; 61. Grease-proof membrane; 62. Water-permeable filter screen; 63. Fixed mounting frame; 7. Stirring component; 71. Drive motor; 72. Sealing ring; 73. Stirring frame; 8. Wastewater discharge pipe. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Reference Figure 1 , Figure 4 , Figure 6 and Figure 7 This invention provides an oil recovery mechanism based on carbonized wool wastewater treatment. In order to absorb water from the wool washing wastewater after the sedimentation step, thereby increasing the oil concentration of the wastewater and increasing the subsequent centrifugal recovery rate of lanolin, and avoiding multiple separation and recovery, the mechanism includes a centrifuge 1 and a heating tank 2 connected to the inlet of the centrifuge 1, and also includes a wastewater removal mechanism connected to the inlet of the heating tank 2; the wastewater removal mechanism includes an outer tank 3, an inner tank 4 and a water removal component 5.

[0018] like Figure 3 As shown, the outer tank 3 includes a support frame 31, a shielding tank 32 and an inner heating element 33. The shielding tank 32 is a metal tank. The inner heating element 33 is installed in contact with the inner wall of the shielding tank 32 and can provide heating when needed. The support frame 31 is installed at the bottom of the shielding tank 32. The inner tank 4 is located inside the shielding tank 32. The end of the shielding tank 32 is provided with a connecting pipe that connects to the sedimentation part, and the connecting pipe connects the shielding tank 32 and the inlet in the center of the top wall of the inner tank 4.

[0019] like Figure 4 As shown, the dewatering assembly 5 includes a rotary dewatering assembly 51 and a guiding stirring assembly 52. ​​The rotary dewatering assembly 51 is located inside the inner tank 4 and includes a drive component 511 and a water-permeable filter component 6. The water-permeable filter component 6 includes an anti-grease-permeable membrane 61, a water-permeable filter screen 62, and a shaping and mounting bracket 63. The shaping and mounting bracket 63 is installed at the center of the inner tank 4, and a wastewater outlet pipe 8 is provided at the connection between the bottom end of the shaping and mounting bracket 63 and the inner tank 4. The wastewater outlet pipe 8 is connected to the inlet of the heating tank 2. The drive component 511 is located at the end of the shielding tank 32, and the output end of the drive component 511 passes through the shielding tank 32 and the top wall of the inner tank 4 and acts as a shielding component. The sizing and mounting frame 63 is surrounded by an anti-grease-permeable membrane 61 and a water-permeable filter 62. This allows the scouring wastewater falling from the center of the top wall of the inner tank 4 to fall into the water-permeable filter 6. After passing through the anti-grease-permeable membrane 61 and the water-permeable filter 62, some water seeps out, reducing the water content in the scouring wastewater and increasing its grease density. After dewatering, the wastewater is introduced into the heating tank 2 through the wastewater outlet pipe 8 for heating before entering the centrifuge 1 for separation. This allows the scouring wastewater to enter subsequent processes with a higher grease density, increasing the centrifugal recovery rate of lanolin.

[0020] like Figure 5 As shown, the shaping and mounting frame 63 is a ring-shaped frame, and the shaping and mounting frame 63 is divided into upper and lower parts. The upper part of the shaping and mounting frame 63 has a rubber ring at its edge, and the lower part is a concave metal bottom ring. The lower part of the shaping and mounting frame 63 is connected to the wastewater outlet pipe 8 for fixation. The grease-proof membrane 61 and the water-permeable filter screen 62 are arranged around the upper part of the shaping and mounting frame 63, with the grease-proof membrane 61 located on the inner side and the water-permeable filter screen 62 located on the outer side. The driving component 511 is a motor, and the output end of the motor is provided with a driving vane. The driving vane is tightly attached to the rubber ring of the upper part of the shaping and mounting frame 63, so that the driving component 511 can drive the upper part of the shaping and mounting frame 63 to rotate inside the inner tank 4, so that the grease-proof membrane 61 and the water-permeable filter screen 62 rotate synchronously. During the rotation, water seepage is completed. In addition, keeping the grease-proof membrane 61 in motion can prevent lanolin from sticking.

[0021] The permeable filter 62 is an annular filter with pleats, which increases the permeable area and helps water to pass through and flow out quickly. The permeable filter 62 also protects and shapes the outside of the grease-proof membrane 61, preventing deformation of the grease-proof membrane 61 when the water pressure is too high.

[0022] The bottom of the inner tank 4 is provided with a drain outlet corresponding to the water-permeable filter screen 62, which is used to discharge the water that has seeped into the inner tank 4.

[0023] The guiding stirring component 52 is located inside the inner tank 4, and the guiding stirring component 52 acts in the middle of the water-permeable filter element 6.

[0024] like Figure 6 As shown, the guiding and stirring assembly 52 includes a guiding cone 521, a shielding platform 522, a control component 523, and a stirring component 7. The shielding platform 522 is located above the connection between the wastewater outlet pipe 8 and the shaping mounting bracket 63, serving to shield the wastewater outlet pipe 8, preventing the wastewater inside the inner tank 4 from being discharged through the wastewater outlet pipe 8. The control component 523 is located at the bottom of the inner tank 4, and the control end of the control component 523 is connected to the shielding platform 522, enabling control of the shielding platform 522's shielding of the wastewater outlet pipe 8. The stirring component 7 is located at the end of the shielding platform 522, and the guiding cone 521 is located at the top of the stirring component 7. The guiding cone 521 is located below the feed inlet on the top wall of the inner tank 4, and the edge of the guiding cone 521 is close to the anti-grease penetration membrane 61, allowing the wool washing wastewater falling into the inner tank 4 to flow down close to the anti-grease penetration membrane 61 through the guidance of the guiding cone 521, causing water seepage during the descent.

[0025] The control unit 523 includes a drive cylinder and a control bracket connected to the shielding platform 522. The control bracket passes through the bottom wall of the inner tank 4 and is slidably installed. The drive cylinder is located below the inner tank 4, and the drive end of the drive cylinder is connected to the control bracket. This allows the control bracket and the shielding platform 522 to move upward through the drive cylinder, thereby releasing the shielding platform 522 from blocking the wastewater outlet pipe 8. This allows the wastewater to remain in the inner tank 4 and the water-permeable filter 6. After the water seeps out under the action of water pressure, the shielding platform 522 is then controlled to move upward, allowing the partially dewatered wastewater to be discharged through the wastewater outlet pipe 8 to the subsequent process.

[0026] The top surface of the shielding platform 522 is a cone, and the lower half of the shielding platform 522 is a cylinder, with an anti-grease penetration membrane 61 attached to the edge of the cylinder.

[0027] like Figure 7As shown, when wastewater stays in the inner tank 4, it is pressed out of the grease-proof membrane 61 under water pressure. The grease-proof membrane 61 prevents lanolin from seeping out. Since the final wastewater outlet is at the wastewater outlet pipe 8 below the shielding platform 522, when the shielding platform 522 moves upward, the wastewater will pass between the edge of the shielding platform 522 and the grease-proof membrane 61. At this time, the wastewater slowly flows between the shielding platform 522 and the grease-proof membrane 61. During this process, the pressure will increase, further completing the seepage of the water.

[0028] like Figure 7 As shown, the stirring component 7 includes a drive motor 71, a sealing ring 72, and a stirring frame 73. The shielding platform 522 is hollow. The drive motor 71 is located inside the shielding platform 522. The stirring frame 73 is vertically rotatably mounted at the end of the shielding platform 522 and is connected to the output end of the drive motor 71. The sealing ring 72 is located at the connection between the stirring frame 73 and the shielding platform 522. The guide cone 521 is located at the top of the stirring frame 73, allowing the guide cone 521 to guide and throw out wastewater to flow down the anti-grease penetration membrane 61 while rotating.

[0029] The stirring rack 73 includes a rotating shaft connected to the output end of the drive motor 71 and an opposing stirring bar located on the outside of the rotating shaft. The stirring bar is located between the shielding platform 522 and the guide cone 521, forming agitation of the wastewater remaining inside the water-permeable filter 6 to prevent lanolin from sticking.

[0030] It should be clarified that the guide cone 521 and the water-permeable filter element 6 rotate in opposite directions, allowing the wastewater guided by the guide cone 521 to fall onto the grease-proof membrane 61 at a faster speed. Combined with the rotational centrifugal force and dynamic water pressure, this increases the seepage speed of wastewater at the connection between the guide cone 521 and the grease-proof membrane 61.

[0031] Working principle: First, the settled wastewater enters the shielding tank 32 and the inlet in the center of the top wall of the inner tank 4 through the connecting pipe. At this time, the wastewater falls from the top into the water-permeable filter element 6. The drive motor 71 is started to drive the stirring frame 73 and the guide cone 521 to rotate. At the same time, the drive component 511 is started to drive the shaping and mounting frame 63 to rotate, so that the anti-grease permeation membrane 61 and the water-permeable filter screen 62 rotate synchronously. The falling wool washing wastewater can be guided by the rotation of the guide cone 521 and flows down along the anti-grease permeation membrane 61, causing water to seep out during the falling process. When the wastewater fills the entire inner space of the anti-grease permeation membrane 61, under the action of water pressure, a large amount of water is expelled. The water seeps through the permeable filter 62 and falls into the bottom of the inner tank 4. When the water pressure is insufficient to allow the water to continue to seep out, the control unit 523 is activated, which controls the shielding platform 522 to move upward and remove the shielding of the wastewater outlet pipe 8. At this time, the wastewater inside the anti-grease permeation membrane 61 will slowly flow down through the edge of the shielding platform 522 and the anti-grease permeation membrane 61. During the process, due to the small passage space, the water pressure will increase. At this time, the water will seep out further through the anti-grease permeation membrane 61. Finally, the wool washing wastewater that has completed part of the water removal will enter the heating tank 2 through the wastewater outlet pipe 8 to complete the heating and finally enter the centrifuge 1 to complete the centrifugal separation.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A grease recovery mechanism based on carbonized wool wastewater treatment, comprising a centrifugal separator (1) and a heating tank (2) connected to the feed inlet of the centrifugal separator (1), characterized in that, Also include: The waste water dewatering mechanism connected with the inlet of the heating tank body (2), the waste water dewatering mechanism includes the inner layer tank body (4) for introducing waste water and the dewatering assembly (5); The dewatering assembly (5) includes a rotating dewatering assembly (51) and a guide stirring assembly (52); The rotating dewatering assembly (51) includes a water-permeable filter (6) arranged along the axis of the inner layer tank body (4) and a driving member (511) for driving the water-permeable filter (6) to rotate, the water-permeable filter (6) includes an oil-proof permeable membrane (61) and a water-permeable filter screen (62) arranged around, and forms an annular water body exosmosis area inside the inner layer tank body (4); The guide stirring assembly (52) is arranged below the inner layer tank body (4) and acts on the water body exosmosis area of the oil-proof permeable membrane (61), forming multiple guided exosmosis and static liquid stirring of waste water.

2. The grease recovery mechanism based on carbonized wool wastewater treatment according to claim 1, characterized in that, The water-permeable filter (6) further includes a shaped mounting frame (63), the shaped mounting frame (63) is mounted at the center of the inner side of the inner layer tank body (4), and the bottom end of the shaped mounting frame (63) is provided with a waste water outlet pipeline (8) at the connection with the inner layer tank body (4), and the waste water outlet pipeline (8) is connected with the inlet of the heating tank body (2).

3. The grease recovery mechanism based on carbonized wool wastewater treatment according to claim 2, characterized in that, The shaped mounting frame (63) is an annular frame body and is divided into upper and lower parts, the oil-proof permeable membrane (61) and the water-permeable filter screen (62) are arranged around the outer side of the upper half of the shaped mounting frame (63); The water-permeable filter screen (62) is an annular pleated filter screen, and the inner side is pleated to fit the oil-proof permeable membrane (61), and the waste water inlet of the top wall of the inner layer tank body (4) is located at the center of the oil-proof permeable membrane (61).

4. The grease recovery mechanism based on carbonized wool wastewater treatment according to claim 2, characterized in that, The waste water dewatering mechanism further includes an outer layer tank body (3), the outer layer tank body (3) includes a support frame (31), a metal shielding tank (32), and an inner heating element (33) arranged on the inner wall of the shielding tank (32); The inner layer tank body (4) is arranged inside the shielding tank (32).

5. The grease recovery mechanism based on carbonized wool wastewater treatment according to claim 4, characterized in that, The driving member (511) is arranged at the end of the shielding tank (32), the output end of the driving member (511) penetrates the top wall of the shielding tank (32) and the inner layer tank body (4) and is provided with a driving vane, the edge of the upper half of the shaped mounting frame (63) is provided with a rubber ring, and the driving vane is tightly fitted with the rubber ring of the upper half of the shaped mounting frame (63) to transmit rotary power, so that the upper half of the shaped mounting frame (63) can carry the oil-proof permeable membrane (61) and the water-permeable filter screen (62) in a rotating state, and the lower half of the shaped mounting frame (63) is connected with the waste water outlet pipeline (8) for fixation.

6. The grease recovery mechanism based on carbonized wool wastewater treatment according to claim 2, characterized in that, The guide stirring assembly (52) includes a guide cone (521), a shielding table (522), a control member (523), and a stirring member (7); The shielding table (522) is arranged above the connection between the waste water outlet pipeline (8) and the shaped mounting frame (63), the control member (523) is arranged at the bottom end of the inner layer tank body (4), and the control end of the control member (523) is connected with the shielding table (522), which can control the lifting of the shielding table (522) to open and close the waste water outlet pipeline (8); The stirring member (7) is mounted on the top of the shielding table (522), the guide cone (521) is fixed on the top end of the stirring member (7) and the edge is close to the inner wall of the grease permeation prevention film (61).

7. The grease recovery mechanism based on carbonized wool wastewater treatment according to claim 6, characterized in that, The stirring member (7) comprises a driving motor (71), a sealing ring (72) and a stirring frame (73), the driving motor (71) is arranged inside the hollow shielding table (522), the stirring frame (73) is vertically rotatably mounted on the top of the shielding table (522) and is driven by the driving motor (71), the sealing ring (72) is arranged at the connection between the stirring frame (73) and the shielding table (522), and the guide cone (521) is fixedly arranged at the end of the stirring frame (73).

8. The grease recovery mechanism based on carbonized wool wastewater treatment according to claim 7, characterized in that, The stirring frame (73) comprises a rotating shaft connected with the driving motor (71) and a stirring inclined rod arranged outside the rotating shaft, and the stirring inclined rod is located between the shielding table (522) and the guide cone (521).

9. The grease recovery mechanism based on carbonized wool wastewater treatment according to claim 6, characterized in that, The top surface of the shielding table (522) is a conical surface, and the lower half is a cylinder, and the edge of the cylinder is close to the inner wall of the grease permeation prevention film (61).

10. The grease recovery mechanism based on carbonized wool wastewater treatment according to claim 1, characterized in that, The inner layer tank body (4) is provided with a drainage port corresponding to the water permeable filter screen (62).

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