Full vacuum filter device for fecal matter treatment

Abstract

The utility model relates to filter device field, especially in full vacuum filter device for excrement and urine treatment, including full vacuum sealed cavity, full vacuum sealed cavity includes first cavity and second cavity, one end of first cavity is linked together with one end of second cavity, the filter screen that is suitable for the shape of first cavity is detachably installed in first cavity, the press screen that is suitable for the shape of second cavity is detachably installed in second cavity, and the frame of press screen is detachably connected with the frame of filter screen, be provided with spiral conveying device for conveying solid material in full vacuum sealed cavity. The application can make material first intercept big solid impurity through filter screen, carry out preliminary separation to liquid, push material through spiral auger rotation, material enters into second cavity from first cavity, the cavity changes from wide to narrow, and then further press dewatering and intercept smaller solid impurity through press screen to material, can carry out solid liquid separation to material.

Description

Technical Field

[0001] This utility model relates to the field of filtration device technology, specifically a full vacuum filtration device for sewage treatment. Background Technology

[0002] The concept of excrement encompasses both pollutants and resources. In China, urban excrement has long been used as fertilizer. However, for a long time, people have focused more on the resource utilization of excrement and less on its simple treatment and use. Since the 1980s, due to various reasons, the agricultural use of urban excrement has experienced a dramatic decline, forcing a large amount of excrement to be dumped in areas near cities, leading to more serious sanitation and environmental pollution problems. The rapid expansion of cities has become a trend, especially in my country, where a large number of rural migrants flock to cities every year, resulting in an increasing urban population and a larger urban area. The high concentration of people generates a large amount of domestic waste and excrement to be treated every day. Usually, excrement is flushed into septic tanks, and relevant units regularly use vacuum trucks to pump out and clean the sludge from each septic tank before transporting it to remote pipes for dumping. This causes long-term blockage of pipes, poor water flow, sedimentation and floating of sewage in rivers, and increased burden on sewage treatment plants. Many cities have recognized that the excrement problem is an urgent issue that must be addressed in the urban environmental protection development strategy.

[0003] In the process of treating sewage, the treated medium contains heavy objects such as stones, screws, nuts, bricks, and iron blocks; floating and suspended matter larger than 10 mm, such as sanitary napkins, plastic bags, and silk fabrics; and substances larger than 6 mm, such as cigarette butts, hair, filaments, and fibers. If these foreign objects are not removed before treating the sewage, it will cause problems such as pipe blockage, hindering subsequent liquid phase treatment and increasing the maintenance costs of subsequent treatment equipment. Therefore, we need to propose a full vacuum filtration device for sewage treatment. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a full vacuum filtration device for treating fecal waste, comprising a full vacuum sealed cavity, the full vacuum sealed cavity including a first cavity and a second cavity, one end of the first cavity being connected to one end of the second cavity, a filter screen adapted to the shape of the first cavity being detachably installed in the first cavity, and a pressing screen adapted to the shape of the second cavity being detachably installed in the second cavity, the frame of the pressing screen being detachably connected to the frame of the filter screen;

[0005] The fully vacuum sealed cavity is equipped with a screw conveyor for conveying solid materials, and the screw conveyor is located in the cavity formed by the filter screen and the pressing screen.

[0006] The top of one end of the fully vacuum sealed cavity is connected to a vacuum inlet, which is connected to the suction pipe of an external vacuum device through a sealing joint; a vacuum outlet is connected to one end of the fully vacuum sealed cavity and below the vacuum inlet.

[0007] The bottom of one end of the second cavity is fixedly connected to a full vacuum discharge structure for discharging solid materials.

[0008] In one embodiment of this application, the spiral conveying device includes a drive motor fixedly installed at one end of the first cavity, and the output shaft of the drive motor is connected to a spiral auger.

[0009] In one embodiment of this application, the auger includes a central spindle keyed to the output shaft of a drive motor. The surface of the central spindle is integrally formed with variable pitch spiral blades, the pitch of which gradually decreases from the end near the filter screen to the end near the pressing screen.

[0010] In one embodiment of this application, a cleaning brush is provided at the edge of the variable pitch spiral blade, and the bristles of the cleaning brush abut against the inner surface of the filter screen and the pressing screen.

[0011] In one embodiment of this application, the filter screen and the pressing screen are respectively fixedly installed on the inner walls of the first cavity and the second cavity by bolts, and the frame of the filter screen is fixedly connected to the frame of the pressing screen by bolts.

[0012] In one embodiment of this application, the mesh size of the filter screen is no greater than 6 mm, and the mesh size of the pressing screen is no greater than 2 mm.

[0013] The beneficial effects of this utility model are:

[0014] 1. By generating a negative pressure effect in the fully vacuum sealed cavity through an external vacuum device, a vacuum state is formed inside the fully vacuum sealed cavity. This allows external materials to be automatically drawn into the fully vacuum sealed cavity for filtration and processing without power. After entering the filter screen, the liquid is separated, and the solid material is conveyed to the other end by a spiral auger. The fully vacuum discharge structure can automatically open the cover plate according to the stored material, effectively solving the problems of wear and maintenance of feeding and conveying equipment, as well as the problem of equipment being unable to discharge material under vacuum conditions. This achieves the purpose of conveying materials without power and processing materials with minimal wear and tear on subsequent processing equipment.

[0015] 2. The mesh diameters of the filter screen and the pressing screen are set in a gradient, with the filter screen mesh diameter being larger than that of the pressing screen mesh. The material first passes through the filter screen to intercept large solid impurities, and the liquid undergoes preliminary separation. As the screw conveyor rotates, the material is pushed from the first chamber into the second chamber, where the chamber narrows. The material then passes through the pressing screen for further pressing and dehydration, while intercepting smaller solid impurities, thus achieving solid-liquid separation.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the structure according to an embodiment of the present invention is shown.

[0019] Figure 2 A schematic diagram of the structure of a spiral auger according to an embodiment of the present invention is shown.

[0020] Figure 3 A schematic diagram of the structure of a cleaning brush according to an embodiment of the present invention is shown.

[0021] In the diagram: 1. Fully vacuum sealed cavity; 2. Filter screen; 3. Pressing screen; 4. Spiral auger; 5. Fully vacuum discharge structure; 6. Vacuum liquid inlet; 7. Vacuum liquid outlet; 8. Drive motor; 9. Central spindle; 10. Variable pitch spiral blades; 11. First cavity; 12. Second cavity; 13. Cleaning brush. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Example 1

[0024] See Figures 1-3 This utility model provides a full vacuum filtration device for treating fecal waste, including a full vacuum sealed cavity 1. The full vacuum sealed cavity 1 includes a first cavity 11 and a second cavity 12. One end of the first cavity 11 is connected to one end of the second cavity 12. A filter screen 2 adapted to the shape of the first cavity 11 is detachably installed in the first cavity 11. A pressing screen 3 adapted to the shape of the second cavity 12 is detachably installed in the second cavity 12. The frame of the pressing screen 3 is detachably connected to the frame of the filter screen 2.

[0025] A screw conveyor for conveying solid materials is installed in the fully vacuum sealed cavity. The screw conveyor is located in the cavity formed by the filter screen 2 and the pressing screen 3.

[0026] It should be noted that the inner cavity of the first cavity 11 is wider than the inner cavity of the second cavity 12;

[0027] The full vacuum discharge structure 5 includes a discharge housing and a sealing cover for sealing and covering the discharge port. A pressure sensor is provided on the inner wall of the discharge housing. The pressure sensor is electrically connected to an external controller. The controller is electrically connected to an electric push rod, an actuator that drives the sealing cover to open. When the pressure sensor detects that the pressure of the solid material accumulation above the sealing cover reaches a preset value, the controller drives the actuator to open the sealing cover to discharge the material. After discharge, the actuator drives the cover to reset and seal against the discharge port. In this embodiment, the external controller is set as an electric push rod.

[0028] The top of one end of the fully vacuum sealed cavity 1 is connected to a vacuum inlet 6, which is connected to the suction pipe of an external vacuum device through a sealing joint; a vacuum outlet 7 is connected to one end of the fully vacuum sealed cavity 1 and below the vacuum inlet 6.

[0029] It should be noted that, in order to prevent the discharged liquid from flowing back into the fully vacuum sealed cavity 1 and disrupting the vacuum environment or causing secondary pollution, a check valve is installed on the vacuum drain port 7.

[0030] The bottom of one end of the second cavity 12 is connected to a full vacuum discharge structure 5 for discharging solid materials.

[0031] An external vacuum device creates a negative pressure effect within the fully vacuum sealed cavity 1, forming a vacuum state. This allows external materials to be automatically drawn into the fully vacuum sealed cavity for filtration and processing without power. After entering the filter screen, the liquid is separated, and the solid material is conveyed to the other end by a spiral auger. The fully vacuum discharge structure can automatically open the sealing cover according to the stored material, effectively solving the problems of wear and maintenance of the feeding and conveying equipment, as well as the problem of the equipment being unable to discharge material under vacuum conditions. This achieves the purpose of conveying materials without power and minimizing wear on subsequent processing equipment.

[0032] Example 2

[0033] See Figures 1-3 The screw conveyor includes a drive motor 8 fixedly installed at one end of the first cavity 11, and the output shaft of the drive motor 8 is connected to a screw auger 4.

[0034] The spiral auger 4 includes a central spindle 9 that is keyed to the output shaft of the drive motor 8. The surface of the central spindle 9 is integrally formed with variable pitch spiral blades 10, and the pitch of the variable pitch spiral blades 10 gradually decreases from the end near the filter screen 2 to the end near the pressing screen 3.

[0035] It should be noted that by gradually squeezing the solid material through the change of screw pitch gradient, the pressing mesh 3 is assisted to improve the dewatering effect, which can further dewater the manure and reduce the time spent on subsequent treatment.

[0036] The filter screen 2 and the pressing screen 3 are respectively fixedly installed on the inner walls of the first cavity 11 and the second cavity 12 by bolts, and the frame of the filter screen 2 is fixedly connected to the frame of the pressing screen 3 by bolts.

[0037] The filter screen 2 and the pressing screen 3 are fixed in a detachable manner, which allows them to be disassembled and replaced if they are damaged.

[0038] The mesh size of the filter screen 2 is no greater than 6 mm, and the mesh size of the pressing screen 3 is no greater than 2 mm.

[0039] Using the above scheme, the mesh diameters of filter screen 2 and pressing screen 3 are set in a gradient, with the mesh diameter of filter screen 2 being larger than that of pressing screen 3. The material first passes through filter screen 2 to intercept large solid impurities, and the liquid undergoes preliminary separation. As the screw conveyor 4 rotates, it pushes the material from the first chamber 11 into the second chamber 12. The chamber narrows, and the material is then further pressed and dehydrated by pressing screen 3, while smaller solid impurities are intercepted, thus achieving solid-liquid separation.

[0040] Example 3

[0041] See Figure 3 In order to clean the surfaces of the filter screen 2 and the pressing screen 3 and prevent the mesh of the filter screen 2 and the pressing screen 3 from becoming clogged, a cleaning brush 13 is provided at the edge of the variable pitch spiral blade 10, and the bristles of the cleaning brush 13 abut against the inner surface of the filter screen 2 and the pressing screen 3.

[0042] When the variable pitch spiral blade 10 rotates, it drives the cleaning brush 13 to scrape off the solid impurities attached to the surface of the filter screen 2 and the pressing screen 3, preventing the mesh from clogging and affecting filtration. This can effectively solve the problem of easy clogging of the filter screen 2 and the pressing screen 3, which requires frequent machine shutdown for cleaning.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vacuum filtration device for treating sewage, comprising a fully vacuum sealed cavity (1), characterized in that: The fully vacuum sealed cavity (1) includes a first cavity (11) and a second cavity (12). One end of the first cavity (11) is connected to one end of the second cavity (12). A filter screen (2) adapted to the shape of the first cavity (11) is detachably installed in the first cavity (11). A pressing screen (3) adapted to the shape of the second cavity (12) is detachably installed in the second cavity (12). The frame of the pressing screen (3) is detachably connected to the frame of the filter screen (2). The fully vacuum sealed cavity is equipped with a screw conveyor for conveying solid materials. The screw conveyor is located in the cavity formed by the filter screen (2) and the pressing screen (3). The top of one end of the fully vacuum sealed cavity (1) is connected to a vacuum inlet (6), and the vacuum inlet (6) is connected to the suction pipe of an external vacuum device through a sealing joint; one end of the fully vacuum sealed cavity (1) and below the vacuum inlet (6) is connected to a vacuum outlet (7). The bottom of one end of the second cavity (12) is connected to a full vacuum discharge structure (5) for discharging solid materials.

2. The all-vacuum filtration device for treating fecal waste according to claim 1, characterized in that: The spiral conveying device includes a drive motor (8) fixedly installed at one end of the first cavity (11), and the output shaft of the drive motor (8) is connected to a spiral auger (4).

3. The all-vacuum filtration device for treating fecal waste according to claim 2, characterized in that: The spiral auger (4) includes a central spindle (9) keyed to the output shaft of the drive motor (8). The surface of the central spindle (9) is integrally formed with variable pitch spiral blades (10). The pitch of the variable pitch spiral blades (10) gradually decreases from the end near the filter screen (2) to the end near the pressing screen (3).

4. The all-vacuum filtration device for sewage treatment according to claim 3, characterized in that: A cleaning brush (13) is provided at the edge of the variable pitch spiral blade (10), and the bristles of the cleaning brush (13) abut against the inner surface of the filter screen (2) and the pressing screen (3).

5. The all-vacuum filtration device for sewage treatment according to claim 1, characterized in that: The filter screen (2) and the pressing screen (3) are fixedly installed on the inner walls of the first cavity (11) and the second cavity (12) respectively by bolts, and the frame of the filter screen (2) and the frame of the pressing screen (3) are fixedly connected by bolts.

6. The all-vacuum filtration device for treating fecal waste according to claim 1, characterized in that: The mesh size of the filter screen (2) is no greater than 6 mm, and the mesh size of the pressing screen (3) is no greater than 2 mm.

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