Rural domestic sewage treatment system for cold and cold mountainous areas

Abstract

The utility model discloses a rural domestic sewage treatment system in a cold and cold mountainous area, which comprises a water collecting well, a sewage treatment tank, an anaerobic biological membrane tank, a gravel contact tank and a water storage tank which are sequentially arranged in the sewage treatment tank, and a water inlet distribution tank communicated with the water collecting well is arranged above an anaerobic reaction area in the anaerobic biological membrane tank. The water inlet distribution groove is provided with an outflow hole communicated with the anaerobic reaction area, an overflow hole is formed in the water collecting well and located above the outflow hole, the overflow hole is provided with an overrunning pipe communicated with the gravel contact pool, a plug board gate matched with the outflow hole is arranged in the water inlet distribution groove, and the water storage pool is connected with a water outlet pipe. The overflow hole is formed in the position, above the outflow hole, of the water inlet distribution groove, and the exceeding pipe is arranged in a matched mode, so that when the water inlet amount exceeds the flow of the outflow hole in the right side, sewage directly enters the gravel contact pool of the next unit from the exceeding pipe connected with the overflow hole to be purified. The sewage treatment mode is adaptively adjusted, and the adaptability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a domestic sewage treatment system in rural areas of high-altitude and cold mountainous areas. Background Art

[0002] Rural populations are concentrated in high-altitude mountainous areas. Affected by tourism services and temperature, the quality and quantity of sewage water fluctuate greatly, showing obvious seasonal characteristics. Water resources are relatively abundant in high-altitude mountainous areas. In winter, to prevent pipes from freezing, some farmers divert long-flowing water to flush toilets or kitchens, resulting in low water concentration in the sewage treatment facilities. Except for suspended solids, the water inlet concentration of organic matter, ammonia nitrogen, total phosphorus and other indicators meet the standards, and sludge cannot grow normally. Most existing treatment processes are directly applied to urban treatment processes, including A 2 O, AO+constructed wetland, MBBR, MBR, etc. have high operating costs, high technical requirements, and difficult operation and maintenance, and cannot effectively take into account the treatment of domestic sewage in different seasons. Utility Model Content

[0003] The purpose of the utility model is to provide a rural domestic sewage treatment system in high-altitude and cold mountainous areas, so as to solve the problem that the existing sewage treatment technology cannot effectively take into account the domestic sewage treatment in different seasons in high-altitude and cold mountainous areas.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A rural domestic sewage treatment system in a high-altitude mountainous area comprises a water collection well and a sewage treatment tank arranged in sequence, an anaerobic biofilm tank, a gravel contact tank and a water storage tank arranged in sequence in the sewage treatment tank, a water inlet distribution trough connected to the water collection well is provided above the anaerobic reaction zone in the anaerobic biofilm tank, the water inlet distribution trough is provided with an outflow hole connected to the anaerobic reaction zone, an overflow hole is provided above the outflow hole in the water collection well, the overflow hole is provided with a bypass pipe connected to the gravel contact tank, a slide gate adapted to the outflow hole is provided in the water inlet distribution trough, and the water storage tank is connected to an outlet pipe.

[0006] Furthermore, the anaerobic reaction zone is provided with elastic filler, the anaerobic biofilm pool is provided with a water distribution pipe, the water inlet end of the water distribution pipe is located in the water outlet area below the elastic filler, and the water outlet end of the water distribution pipe is connected to the gravel contact pool.

[0007] Furthermore, the inter-gravel contact pool is provided with a packing layer, a normal position water distribution tank, and a high position water distribution tank in sequence from bottom to top. The normal position water distribution tank is connected to the water distribution pipe, and the high position water distribution tank is connected to the overrun pipe.

[0008] Furthermore, a supporting layer and a filtering layer are sequentially provided in the packing layer from bottom to top, a steel mesh is provided between the supporting layer and the filtering layer, and a water hole communicating with the water reservoir is provided in the supporting layer.

[0009] Furthermore, the filter layer includes a first volcanic stone layer, a second volcanic stone layer, and a ceramsite layer arranged in descending order;

[0010] The volcanic rock particle size of the first volcanic rock layer is 50-70 mm and the thickness is 400 mm;

[0011] The volcanic rock particle size of the second volcanic rock layer is 30-50 mm and the thickness is 250 mm;

[0012] The ceramsite particle size of the ceramsite layer is 3-10 mm and the thickness is 150 mm;

[0013] The supporting layer includes a third volcanic rock layer and a gravel layer arranged in sequence from top to bottom;

[0014] The volcanic rock particle size of the third volcanic rock layer is 30-50 mm and the thickness is 200 mm;

[0015] The gravel layer has a gravel particle size of 70 to 150 mm and a thickness of 300 mm.

[0016] Furthermore, the water hole is located in the gravel layer, and a protective cage adapted to the water hole is provided in the gravel layer.

[0017] Furthermore, a connecting inspection hole and a vent pipe are provided on the top wall of the sewage treatment tank above the anaerobic biofilm tank, the gravel contact tank and the water reservoir, and the top of the vent pipe is at a height of not less than 1.5m from the ground.

[0018] Furthermore, the water collection well is provided with a solid waste collection and blockage preventer, which includes a first grid frame on the slag inlet side and a second grid frame on the slag blocking side. The lower end of the first grid frame is hinged to the lower end of the second grid frame. The upper ends of the first grid frame and the second grid frame are provided with pull ropes, and the other ends of the pull ropes are provided with hanging rings. When the pull rope on the first grid frame is pulled, the first grid frame flips toward the direction of the second grid frame and forms a grid basket that is connected from top to bottom with the second grid frame. The lower end of the grid basket is provided with a slag storage net bag.

[0019] Furthermore, the first grid frame and the second grid frame each include an outer frame, a plurality of slag-blocking grids are arranged at intervals in the outer frame, and a pull ring for fixing the pull rope is provided at the upper end of the outer frame.

[0020] The utility model has the following advantages:

[0021] 1. By providing an overflow hole above the outflow hole in the water inlet distribution trough and a matching overflow pipe, when the water inlet exceeds the flow of the outflow hole on the right, the sewage will directly enter the gravel contact tank of the next unit for purification treatment through the overflow pipe connected to the overflow hole. This can adaptively adjust the sewage treatment method according to the characteristics of sewage in rural settlements in high-altitude mountainous areas, and has stronger adaptability.

[0022] 2. The solid waste collection and anti-blocking device installed in the collection well can effectively intercept larger particles of waste in the sewage, reduce the waste content in the sewage entering the sewage treatment pool, and greatly reduce the pressure on the operation and management of the treatment facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the internal plan of the sewage treatment system.

[0024] Figure 2 A cross-sectional view of a sewage treatment system.

[0025] Figure 3 This is a plan view of the solid waste collection anti-blocking device.

[0026] Figure 4 This is the status diagram of the solid waste collection anti-blocking device during operation.

[0027] Figure 5 This is the status diagram of the solid waste collection anti-blocking device when it is lifted.

[0028] In the figure, 1-water collection well, 2-anaerobic biofilm tank, 3-gravel contact tank, 4-water storage tank, 5-water inlet distribution trough, 6-override pipe, 7-slide gate, 8-water outlet pipe, 9-elastic filler, 10-water distribution pipe, 11-normal position water distribution trough, 12-high position water distribution trough, 13-wire mesh, 14-first volcanic rock layer, 15-second volcanic rock layer, 16-ceramsite layer, 17-third volcanic rock layer, 18-gravel layer, 19-manhole, 20-ventilation pipe, 21-protection cage, 22-first grid frame, 23-second grid frame, 24-pull rope, 25-suspension ring, 26-slag storage net bag, 27-slag retaining grid, 28-pull ring. DETAILED DESCRIPTION

[0029] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0031] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] refer to Figure 1-5 As shown, an embodiment of the present utility model is:

[0036] A rural domestic sewage treatment system in a high-altitude mountainous area comprises a water collection well 1 and a sewage treatment pool arranged in sequence, an anaerobic biofilm pool 2, a gravel contact pool 3, and a water storage pool 4 arranged in sequence in the sewage treatment pool, a water inlet distribution trough 5 connected to the water collection well 1 is provided above the anaerobic reaction zone in the anaerobic biofilm pool 2, the water inlet distribution trough 5 is provided with an outflow hole connected to the anaerobic reaction zone, the water inlet distribution trough 5 is provided with an overflow hole above the outflow hole, the overflow hole is provided with a bypass pipe 6 connected to the gravel contact pool 3, a slide gate 7 adapted to the outflow hole is provided in the water inlet distribution trough 5, and the water storage pool 4 is connected to an outlet pipe 8.

[0037] Specifically, the inlet distribution trough 10 is located in the middle of the water inlet side of the anaerobic biofilm tank 7 and is constructed of steel. The top of the trough is 0.3 m from the equipment roof, and the bottom is 1 m from the roof. Five d30 outflow holes are located on the right side of the trough, ensuring a flow rate greater than 10 m3 / d. Even when the comprehensive sewage variation coefficient Kz = 2.7, this allows for sufficient water flow. Sewage enters the anaerobic biofilm tank reaction zone through the outflow holes. Two d50 overflow holes are located on each side of the trough's top, with the tops of the overflow holes flush with the trough roof.

[0038] By providing an overflow hole above the outlet hole in the water inlet distribution trough 5 and a matching bypass pipe 6, when the water inflow exceeds the flow rate of the outlet hole on the right (such as during long-term water flow in winter), the sewage directly enters the gravel contact tank 8 of the next unit for purification treatment from the bypass pipe 11 connected to the overflow hole. By setting up the water inlet distribution trough 10, the matching bypass pipe 11 and other equipment, the sewage treatment method can be adaptively adjusted according to the characteristics of sewage in rural settlements in high-altitude mountainous areas, and the adaptability is stronger. Furthermore, by synchronously setting a slide gate at the outlet hole, the amount of water entering the anaerobic biofilm tank reaction zone can be further controlled. During the transition period between normal operating conditions and long-term water flow in winter, sewage enters the distribution trough water inlet and overflow hole at the same time and is treated together.

[0039] In this embodiment, the anaerobic reaction zone is provided with an elastic filler 9, and a water distribution pipe 10 is provided in the anaerobic biofilm pool 2. The water inlet end of the water distribution pipe 10 is located in the water outlet area below the elastic filler 5, and the water outlet end of the water distribution pipe 10 is connected to the gravel contact pool 3.

[0040] In specific implementation, the filler bracket of the elastic filler 9 is made of φ4mm steel wire with a spacing of 200mm. The bottom bracket is 0.5m away from the bottom plate of the pool, the top bracket is 0.1m away from the bottom of the water inlet distribution groove, and 1.1m away from the top plate of the equipment; the total height of the elastic filler is 0.9m, and the installation spacing is 200mm×200mm.

[0041] The inter-gravel contact pool 3 is provided with a packing layer, a normal-position water distribution tank 11 and a high-position water distribution tank 12 from bottom to top. The normal-position water distribution tank 11 is connected to the water distribution pipe 10, and the high-position water distribution tank 12 is connected to the overrunning pipe 6.

[0042] Two sets of high water level distribution troughs 12 and normal water level distribution troughs 11 are provided, and water distribution is carried out using triangular weirs of steel structure, and both are supported by rectangular steel.

[0043] Furthermore, the packing layer is sequentially arranged from bottom to top within a support layer and a filter layer. A wire mesh 13 is provided between the support layer and the filter layer. The support layer is provided with a water hole connected to the water reservoir 4. The filter layer comprises, sequentially from top to bottom, a first volcanic rock layer 14, a second volcanic rock layer 15, and a ceramsite layer 16. The volcanic rock particles in the first volcanic rock layer 14 are 50-70 mm in diameter and 400 mm thick. The volcanic rock particles in the second volcanic rock layer 15 are 30-50 mm in diameter and 250 mm thick. The ceramsite particles in the ceramsite layer 16 are 3-10 mm in diameter and 150 mm thick. The support layer comprises, sequentially from top to bottom, a third volcanic rock layer 17 and a gravel layer 18. The volcanic rock particles in the third volcanic rock layer 17 are 30-50 mm in diameter and 200 mm thick. The gravel particles in the gravel layer 18 are 70-150 mm in diameter and 300 mm thick. The purified sewage enters the water reservoir 4 through the water hole. At the same time, the sludge that has fallen off after being flushed also enters the water reservoir 4 through the water hole.

[0044] The water hole is located in the gravel layer 18 , and a protective cage 21 adapted to fit the water hole is provided in the gravel layer 18 .

[0045] The water outlet of the water reservoir 4 adopts a triangular weir, which is set in the middle of the right side of the water reservoir 4 to maintain the water level at 0.9m from the top plate. The outlet pipe 8 adopts a d100 steel pipe and is connected to the triangular weir outlet.

[0046] On the top wall of the sewage treatment tank, above the anaerobic biofilm tank 2, the gravel contact tank 3, and the water reservoir 4, there are connecting inspection holes 19 and vent pipes 20. The top of the vent pipe 20 is at least 1.5m above the ground.

[0047] During operation, the equipment requires no chemicals, no external power supply, and no specialized technicians. Villagers only need to regularly clean the sludge in reservoir 4. When villagers draw fresh water from the reservoir for irrigation, the sludge can be extracted for resource utilization. The equipment operates under different operating conditions to accommodate seasonal variations in water quantity and quality. Under normal operating conditions, microorganisms gradually grow on the fillers in the anaerobic biofilm tank 2 and the gravel contact tank 3, providing the primary purification of higher-concentration influent water. During long-term winter operation, when the influent sewage concentration is low, the gravel contact tank 3 relies primarily on filtration and interception to remove some suspended solids. This also self-cleans the fillers, eliminating the need for manual cleaning. The cleaned sludge enters the reservoir through 24 water holes in the protective cage, enabling simultaneous cleaning and resource utilization of both sludge and sewage. Operating costs are virtually non-existent throughout the entire process.

[0048] In this embodiment, the water collection well 1 is provided with a solid waste collection blockage preventer, which includes a first grid frame 22 on the slag inlet side and a second grid frame 23 on the slag blocking side. The lower end of the first grid frame 22 is hinged to the lower end of the second grid frame 23. The upper ends of the first grid frame 22 and the second grid frame 23 are both provided with a pull rope 24, and the other end of the pull rope 24 is provided with a hanging ring 25. When the pull rope 24 on the first grid frame 22 is pulled, the first grid frame 23 flips toward the direction of the second grid frame 23 and forms a grid basket that is connected from top to bottom with the second grid frame 23. The lower end of the grid basket is provided with a slag storage net bag 26.

[0049] The first grid frame 22 and the second grid frame 23 both include an outer frame. A plurality of slag-blocking grids 27 are spaced apart inside the outer frame. A pull ring 28 for fixing the pull rope 24 is provided at the upper end of the outer frame.

[0050] In this embodiment, the grid basket formed by the first and second grid frames 22, 23 is a rectangular structure, with the slag net 26 connected to the lower end of the second grid frame 23. Specifically, the second grid frame 23 is a grid frame wrapped around three sides of the rectangular structure, while the first grid frame 22 is the remaining single-sided grid frame. The first and second grid frames 22, 23 are hinged only at their lower ends. During use, the second grid frame 23 is placed at the well outlet, while the first grid frame 22 is horizontal. Larger waste particles in the sewage are trapped and blocked by the second grid frame 23, reducing the waste content of the sewage entering the sewage treatment tank. During maintenance, the manhole cover is opened, the wellhead anti-fall net is removed, and then the hanging ring 25 is removed. First, the pull rope 24 on the first grille frame 22 is pulled to close the hinge, and the first grille frame 22 is changed from a horizontal state to a vertical state. Then all the pull ropes are pulled together to lift the grille basket. Large particles of waste such as garbage and suspended matter enter the slag storage net bag by gravity, and the solid waste collection and anti-blocking device is moved to the ground. The intercepted materials in the slag storage net bag are poured into the prepared collection bucket, and the grille slag adhered to the grille is cleaned. Then the cleaned solid waste collection and anti-blocking device is slowly placed in the bottom well outlet chute. After placing it in the designated position, the pull rope 24 of the second grille frame 23 is first loosened, and then the pull rope of the first grille frame 22 is loosened to open the hinge, and the solid waste collection and anti-blocking device returns to working state. The hanging ring 25 is hung on the anti-fall net hook, the anti-fall net is restored and the manhole cover is closed.

[0051] It is understandable that the grid basket formed by the first grid frame 22 and the second grid frame 23 is not limited to a rectangular structure, and can also be other fence-shaped structures with storage space. It only needs to ensure that the first grid frame 51 is a flat plane grid.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rural domestic sewage treatment system in a high-altitude and cold mountainous area, characterized by: It includes a water collection well and a sewage treatment pool arranged in sequence, an anaerobic biofilm pool, a gravel contact pool and a water storage pool arranged in sequence in the sewage treatment pool, a water inlet distribution trough connected to the water collection well is provided above the anaerobic reaction zone in the anaerobic biofilm pool, the water inlet distribution trough is provided with an outflow hole connected to the anaerobic reaction zone, an overflow hole is provided above the outflow hole in the water collection well, the overflow hole is provided with an overrun pipe connected to the gravel contact pool, a slide gate adapted to the outflow hole is provided in the water inlet distribution trough, and the water storage pool is connected to an outlet pipe.

2. The rural domestic sewage treatment system in high-altitude mountainous areas according to claim 1 is characterized by: The anaerobic reaction zone is provided with elastic filler, the anaerobic biofilm pool is provided with a water distribution pipe, the water inlet end of the water distribution pipe is located in the water outlet area below the elastic filler, and the water outlet end of the water distribution pipe is connected to the gravel contact pool.

3. The rural domestic sewage treatment system in high-altitude mountainous areas according to claim 2 is characterized by: The inter-gravel contact pool is provided with a packing layer, a normal-position water distribution tank, and a high-position water distribution tank in sequence from bottom to top. The normal-position water distribution tank is connected to the water distribution pipe, and the high-position water distribution tank is connected to the overrun pipe.

4. The rural domestic sewage treatment system in high-altitude mountainous areas according to claim 3 is characterized by: A supporting layer and a filtering layer are sequentially arranged in the packing layer from bottom to top, a steel mesh is arranged between the supporting layer and the filtering layer, and a water hole communicating with the water reservoir is arranged in the supporting layer.

5. The rural domestic sewage treatment system in high-altitude mountainous areas according to claim 4 is characterized by: The filter layer includes a first volcanic stone layer, a second volcanic stone layer, and a ceramsite layer arranged in order from top to bottom; The volcanic rock particle size of the first volcanic rock layer is 50-70 mm and the thickness is 400 mm; The volcanic rock particle size of the second volcanic rock layer is 30-50 mm and the thickness is 250 mm; The ceramsite particle size of the ceramsite layer is 3-10 mm and the thickness is 150 mm; The supporting layer includes a third volcanic stone layer and a gravel layer arranged in sequence from top to bottom; the volcanic stone particle size of the third volcanic stone layer is 30-50 mm and the thickness is 200 mm; The gravel layer has a gravel particle size of 70 to 150 mm and a thickness of 300 mm.

6. The rural domestic sewage treatment system in high-altitude mountainous areas according to claim 5 is characterized by: The water hole is located in the gravel layer, and a protective cage adapted to the water hole is provided in the gravel layer.

7. The rural domestic sewage treatment system in high-altitude mountainous areas according to claim 1 is characterized by: The top wall of the sewage treatment pool is provided with connecting inspection holes and vent pipes above the anaerobic biofilm pool, the gravel contact pool and the water reservoir. The top of the vent pipe is at a height of not less than 1.5m from the ground.

8. The rural domestic sewage treatment system in high-altitude mountainous areas according to claim 1 is characterized by: The water collection well is provided with a solid waste collection and blockage preventer, which includes a first grid frame on the slag inlet side and a second grid frame on the slag blocking side. The lower end of the first grid frame is hinged to the lower end of the second grid frame. The upper ends of the first grid frame and the second grid frame are both provided with pull ropes, and the other ends of the pull ropes are provided with hanging rings. When the pull rope on the first grid frame is pulled, the first grid frame flips toward the direction of the second grid frame and forms a grid basket that is connected from top to bottom with the second grid frame. The lower end of the grid basket is provided with a slag storage net bag.

9. The rural domestic sewage treatment system in high-altitude mountainous areas according to claim 8 is characterized by: The first grid frame and the second grid frame both include an outer frame, a plurality of slag-blocking grids are arranged at intervals inside the outer frame, and a pull ring for fixing the pull rope is provided at the upper end of the outer frame.

Images