A domestic sewage environmental protection treatment system and method

Abstract

The present invention discloses a domestic sewage environmental treatment system, wherein the belt conveyor of the conveying mechanism conveys the material to the first buffer tank; the dehydration and filtering mechanism comprises an auger press dehydrator and a backwash filter. The present invention collects domestic sewage without water by using a belt conveyor through reasonable improvements, and then transports it to the feed port of the dragon press through a screw pump for dehydration treatment. The generated sewage is pumped to the automatic backwash filter by a centrifugal pump for deep filtration and purification, thereby achieving sewage purification, circulation, recycling and utilization; the saved fresh water can be used as water for garden irrigation of vegetables, fruits, flowers and trees, fundamentally realizing "zero sewage discharge", thereby saving fresh water and reducing environmental pollution; the treated slag can be processed and returned to the field and utilized as an organic fertilizer raw material, thereby realizing the ecological resource recovery and reuse of domestic sewage.

Description

Technical Field

[0001] The present invention belongs to the technical field of sewage treatment, and in particular relates to a domestic sewage environmental protection treatment system and method. Background Art

[0002] There are several main methods for treating domestic sewage (mainly fecal water) on ships. The first is to discharge it after biological treatment. The biological treatment mainly uses activated sludge with aerobic bacteria as the main component to bio-coagulate, adsorb and oxidize organic matter in sewage, decompose and remove organic pollutants in sewage, separate sludge and water, and discharge the clarified water up to the standard. However, it requires the cultivation of aerobic bacteria, and the reaction time is limited. It is generally used in cargo ships with not too many people. The second is to collect and store domestic sewage in sewage storage cabinets first, and discharge it to shore-based receiving devices or to sea areas where discharge is allowed. Direct discharge to sea areas where discharge is allowed requires ships to travel to sea areas where discharge is allowed, and if sewage is not treated, it will increase the burden of marine self-purification and pollute the offshore marine environment. Discharge to shore-based receiving devices is not available in all ports, and shore-based receiving devices usually have high treatment costs. Some treated sewage does not meet the standards and is discharged, which will still cause pollution. At present, domestic sewage in some areas, for example, most rural towns and villages do not have domestic sewage treatment facilities and are directly discharged through toilets, thus causing pollution.

[0003] The existing sewage treatment equipment, technology and methods are difficult to maintain, costly, time-consuming, and ineffective, and they waste fresh water and organic fertilizer resources. Due to the increasingly high current environmental protection standards, it has become the norm for many existing domestic sewage treatment equipment to be damaged, idle, and difficult to meet emission standards. Therefore, there is an urgent need for a new domestic sewage treatment system and method to change the existing low-standard, inefficient and backward domestic sewage treatment chaos. The invented domestic sewage treatment device can recycle organic fertilizer and save fresh water, fundamentally solving the problems of environmental protection treatment of domestic sewage and effective recycling and utilization of resources, and providing a sustainable and ecological solution for beautifying cities and revitalizing rural areas. Summary of the invention

[0004] Therefore, based on the above background, the present invention changes the existing technology and provides a new environmentally friendly domestic sewage treatment system and method.

[0005] The technical solution provided by the present invention is:

[0006] A domestic sewage environmental protection treatment system, comprising:

[0007] A collecting and conveying mechanism, the collecting and conveying mechanism comprises a horizontal belt conveyor, the belt conveyor conveys the material into a first buffer tank, and the wet material in the tank is conveyed to the inlet of the dehydration and filtering mechanism through a single screw pump;

[0008] A dehydration and filtration mechanism, wherein the dehydration mechanism comprises an auger press dehydrator and a backwash filter;

[0009] The material in the first buffer tank is transported to the auger press dehydrator for dehydration. The liquid material and sewage separated by the auger press dehydrator are coarsely filtered and then pressurized by a centrifugal pump to the backwash filter for deep fine filtration.

[0010] One implementation method is that the material in the first buffer tank is transported to an auger press dehydrator via a screw pump for dehydration.

[0011] One implementation method is that the liquid wastewater separated by the auger press dewatering machine is roughly filtered by gravity and then flows into the second buffer tank. The wastewater in the second buffer tank is pressurized by a centrifugal pump and transported to the backwash filter for deep fine filtration and backwashing treatment.

[0012] In one implementation, the belt conveyor comprises a machine frame and a conveyor belt, a baffle is provided at the edge of the conveyor belt, and the machine frame is provided with a first guide plate inclined downward at the conveying end of the conveyor belt.

[0013] One implementation manner is that a second guide plate inclined downward is provided below the conveyor belt, and the second guide plate is located below the first guide plate.

[0014] One implementation method is that a sealing cover is provided on the frame of the belt conveyor, the conveyor belt sealing cover is arranged inside the sealing cover, and the sealing cover is provided with at least one pit mouth connecting pipe above the corresponding conveyor belt, and the pit mouth connecting pipe is connected to the inner cavity of the sealing cover.

[0015] One implementation manner is that the sealing cover is provided with an air pipe connecting pipe above the corresponding first buffer tank, and the air pipe connecting pipe is communicated with the inner cavity of the sealing cover.

[0016] One implementation method is that a collecting pipe is provided below the sealing cover corresponding to the first buffer tank, the upper part of the collecting pipe is communicated with the inner cavity of the sealing cover, and the lower end of the collecting pipe is communicated with the first buffer tank.

[0017] The first guide plate and the second guide plate are inserted into the tube cavity of the collecting tube, and the inner curved surface of the tube cavity is at a distance from the first guide plate and the second guide plate.

[0018] Based on the same inventive concept, the present invention also provides an environmentally friendly method for treating domestic sewage, which comprises the following steps:

[0019] S1: The domestic sewage is transported to the buffer tank through a horizontal belt conveyor;

[0020] S2: The screw pump first transports the material in the buffer tank to the Jiaolong press dehydrator for dehydration;

[0021] S3: The dehydrated residue is packaged and recycled as fertilizer; the dehydrated sewage is filtered through a backwash filter and recycled.

[0022] The above technical solution has the following beneficial effects:

[0023] Through reasonable improvements, the present invention collects domestic sewage without water using a belt conveyor, and then transports it to the feed port of Jiaolong Press for treatment through a screw pump. The separated sewage can be recycled after passing through a backwash filter; the saved fresh water can be used as garden irrigation water for vegetables, fruits, flowers and trees, and can fundamentally achieve "zero sewage discharge", thereby saving fresh water and reducing environmental pollution; the treated slag can be processed as an organic fertilizer raw material to achieve the ecological reuse of organic fertilizer resources back to the field.

[0024] The invention is not only suitable for treating the domestic sewage in ship toilets, but also suitable for treating the domestic sewage in urban and rural toilets. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 The structure of the present invention is schematically shown Figure 1 .

[0027] Figure 2 The structure of the present invention is schematically shown Figure 2 .

[0028] Figure 3 The structure of the present invention is schematically shown Figure 3 .

[0029] Figure 4 The structure of the conveyor belt of the present invention is schematically shown in FIG. Figure 1 .

[0030] Figure 5 It is a schematic structural diagram of the first guide plate of the present invention.

[0031] Figure 6 The structure of the conveyor belt of the present invention is schematically shown in FIG. Figure 2 .

[0032] Figure 7The structure of the conveyor belt of the present invention is schematically shown in FIG. Figure 3 .

[0033] Figure 8 It is a schematic structural diagram of the second guide plate of the present invention.

[0034] Fig. 9 The structure of the sealing cover of the present invention is schematically shown in FIG. Figure 1 .

[0035] Fig.10 The structure of the sealing cover of the present invention is schematically shown in FIG. Figure 2 . DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown 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. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0038] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0039] The present invention will be further described below in conjunction with the accompanying drawings.

[0040] Embodiment 1: According to Figures 1 to 10 A domestic sewage environmental protection treatment system is shown, which comprises:

[0041] A collecting and conveying mechanism, wherein the collecting and conveying mechanism comprises a horizontal belt conveyor 1, and the belt conveyor 1 conveys the materials into a first buffer tank 2;

[0042] A dehydration and filtering mechanism, wherein the dehydration mechanism comprises an auger press dehydrator 4 and a backwash filter 7;

[0043] The material in the first buffer tank 2 is transported to the auger press dehydrator 4 for dehydration, and the liquid material and sewage separated by the auger press dehydrator 4 are filtered through the backwash filter 7. The slag material obtained after dehydration by the auger press dehydrator 4 has an appropriate water content, which is convenient for logistics and packaging.

[0044] There may be another embodiment in which the residues treated by the auger press dehydrator 4 may be sterilized at high temperature and deodorized by aging.

[0045] The material in the first buffer tank is transported to the auger press dehydrator 4 for dehydration.

[0046] The liquid material separated by the auger press dehydrator 4 is transported to the second buffer tank 5, and the material in the second buffer tank 5 is transported to the backwash filter 7 through the centrifugal pump 6 for filtering treatment.

[0047] In specific application, the auger press dehydrator 4 dehydrates the material from the first buffer tank, and the generated sewage is filtered by gravity and flows into the second buffer tank 5. The high and low liquid levels of the tank automatically control the start and stop of the centrifugal pump. The pressurized sewage is deeply filtered and purified by the automatic backwash filter 7, and the clean water is recycled and reused as needed, such as water for garden irrigation of vegetables, fruits, flowers and trees. In specific application, the second buffer tank is located below the auger press dehydrator 4, and the height difference between the two is more than 1 meter.

[0048] The slag material after being dehydrated by the auger press dehydrator 4 can be packaged by an automatic packaging machine for external delivery.

[0049] The belt conveyor 1 comprises a machine frame 11 and a conveyor belt 12. A baffle 13 is provided at the edge of the conveyor belt 12. The machine frame 11 is provided with a first guide plate 14 inclined downward at the conveying end of the conveyor belt 12. Specifically, the belt conveyor is a roller belt conveyor.

[0050] A second guide plate 15 inclined downward is provided below the conveyor belt 12 .

[0051] The conveyor belt 12 is coated with a water-proof coating or covered with a waterproof film, and the baffle 13 is made of a deformable rubber material, which can adapt to the deformation along with the movement of the conveyor belt.

[0052] Both sides of the first guide plate 14 are mounted on the machine frame 11, specifically, they can be mounted by welding. The first guide plate 14 can be made of stainless steel, and its surface can be coated with polytetrafluoroethylene anti-corrosion paint. In another embodiment, the first guide plate has an arc-shaped scraper 141 at one end close to the conveyor belt, and the end surface of the scraper 141 abuts against the conveyor belt to scrape the material on the conveyor belt and guide it into the first buffer tank. The first guide plate 14 is provided with a clearance bar hole 142 for the baffle to pass through.

[0053] In another embodiment, a second guide plate 15 inclined downward is provided below the conveyor belt 12, the second guide plate 15 is located below the first guide plate 14, and part of the second guide plate 15 is located in the first buffer tank 2. The second guide plate 15 can guide the material left behind by the first guide plate into the first buffer tank again. More specifically, a scraper 151 is provided at the end of the second guide plate 15, and the scraper 151 abuts against the conveyor belt to scrape the material on it again through the movement of the conveyor belt. After the first guide plate and the second guide plate, no liquid material in the conveyor belt will drip onto the ground or the bottom plate of the sealing cover, causing the ground or the sealing cover to be dirty.

[0054] The frame 11 of the belt conveyor 1 is provided with a sealing cover 110, and the sealing cover of the conveyor belt 12 is arranged in the sealing cover 110. The sealing cover 110 is provided with at least one pit mouth pipe 1101 above the corresponding conveyor belt, and the pit mouth pipe 1101 is connected with the inner cavity of the sealing cover, and the pit mouth pipe is vertical. The pit mouth pipe 1101 is used to connect an airtight toilet or squat pit. Through the use of the airtight toilet or squat pit, domestic sewage such as feces can fall onto the conveyor belt through the pit mouth pipe and be transported to the first buffer tank. In specific applications, the airtightness of the toilet (or squat pit) is achieved by an airtight toilet cover and squat pit cover, which are usually in a closed airtight state and are only opened when in use to maintain a negative pressure state.

[0055] In specific applications, there may be other embodiments, in which the sealing cover is provided with a plurality of spray heads, specifically, high-pressure atomizing nozzles, so that the sealing cover can be rinsed and cleaned through the spray heads.

[0056] The sealing cover 110 is provided with an air pipe connecting pipe 1102 above the corresponding first buffer tank. The air pipe connecting pipe 1102 is communicated with the inner cavity of the sealing cover. The air pipe connecting pipe 1102 is connected to the negative pressure ventilation main pipe to reduce the escape of odor in the sealing cover through negative pressure ventilation.

[0057] A collecting pipe 1103 is provided below the sealing cover 110 corresponding to the first buffer tank. The upper portion of the collecting pipe 1103 is communicated with the inner cavity of the sealing cover, and the lower end is communicated with the first buffer tank.

[0058] Specifically, the length of the pit mouth pipe 1101 outside the sealing cover is about 15 cm, the length of the trachea pipe 1102 outside the sealing cover is about 20 cm, and the part of the collecting pipe 113 is located inside the sealing cover, and its overall length is about 15 cm. Of course, the above length range is not limited and can be adaptively adjusted according to the actual application scenario.

[0059] The first guide plate 14 and the second guide plate 15 are inserted into the tube cavity of the collecting tube 1103, and the inner curved surface of the tube cavity has a distance from the first guide plate 14 and the second guide plate 15, so as to facilitate the material to smoothly enter the first buffer tank.

[0060] In specific applications, there may be other embodiments in which an ultraviolet sterilization device may be provided to sterilize and disinfect various components appropriately.

[0061] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A domestic sewage environmental treatment system, characterized in that: It includes: A collecting and conveying mechanism, wherein the collecting and conveying mechanism comprises a horizontal belt conveyor, wherein the belt conveyor conveys the material into a first buffer tank, and the wet material in the tank is conveyed to the inlet of the dehydration and filtering mechanism through a single screw pump; A dehydration and filtration mechanism, wherein the dehydration mechanism comprises an auger press dehydrator and a backwash filter; The material in the first buffer tank is transported to the auger press dehydrator for dehydration, and the liquid material separated by the auger press dehydrator is filtered through a backwash filter.

2. A domestic sewage environmental treatment system according to claim 1, characterized in that: The material in the first buffer tank is transported to the auger press dehydrator through a screw pump for dehydration.

3. A domestic sewage environmental treatment system according to claim 1, characterized in that: The liquid material separated by the auger press dehydrator is transported to the second buffer tank, and the material in the second buffer tank is transported to the backwash filter through a centrifugal pump for filtration treatment.

4. A domestic sewage environmental treatment system according to claim 1, characterized in that: The belt conveyor comprises a machine frame and a conveyor belt. A baffle is provided at the edge of the conveyor belt. The machine frame is provided with a first guide plate inclined downward at the conveying end of the conveyor belt.

5. A domestic sewage environmental treatment system according to claim 4, characterized in that: A second guide plate inclined downward is provided below the conveyor belt, and the second guide plate is located below the first guide plate.

6. A domestic sewage environmental treatment system according to claim 5, characterized in that: The frame of the belt conveyor is provided with a sealing cover, the conveyor belt sealing cover is arranged inside the sealing cover, and the sealing cover is provided with at least one pit mouth pipe above the corresponding conveyor belt, and the pit mouth pipe is connected with the inner cavity of the sealing cover.

7. A domestic sewage environmental treatment system according to claim 6, characterized in that: The sealing cover is provided with an air pipe connecting pipe above the corresponding first buffer tank, and the air pipe connecting pipe is communicated with the inner cavity of the sealing cover.

8. A domestic sewage environmental treatment system according to claim 5, characterized in that: A collecting pipe is provided below the sealing cover corresponding to the first buffer tank, the upper part of the collecting pipe is communicated with the inner cavity of the sealing cover, and the lower end of the collecting pipe is communicated with the first buffer tank; The first guide plate and the second guide plate are inserted into the tube cavity of the collecting tube, and the inner curved surface of the tube cavity is at a distance from the first guide plate and the second guide plate.

9. A method for environmentally friendly treatment of domestic sewage, characterized in that: It includes the following steps: S1: The domestic sewage is transported to the buffer tank through a horizontal belt conveyor; S2: The screw pump first transports the material in the buffer tank to the Jiaolong press dehydrator for dehydration; S3: The dehydrated residue is packaged and recycled as fertilizer; the dehydrated sewage is filtered through a backwash filter and recycled.

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