CN211170156U - Sewage treatment device capable of removing fine silt - Google Patents

Abstract

The utility model discloses a can get rid of sewage treatment plant of slight silt, the power distribution box comprises a box body, the inside of box is equipped with the swirler, the upper portion side of swirler has connect the inlet tube that runs through the box curb plate, the bottom is equipped with the collection sand hopper that runs through the box bottom plate, the lower extreme of collection sand hopper is equipped with the sand discharge pipe of taking the blowdown valve, the top of swirler is equipped with the overflow pipe, the outside that the box inner chamber is located the overflow pipe is fixed with the baffle, the outside that is located collection sand hopper is fixed with down the baffle, go up the baffle and evenly seted up equal water hole with the plate body of baffle down, the box inner chamber is located, the region between the baffle is equipped with the grit filter. The utility model has the advantages of reasonable design, at first utilize the swirler to remove the large granule silt in the sewage, recycle grit filter layer and bedding and padding layer and remove slight silt, can effectively remove the slight silt that is less than 200 mu m in the sewage, and then reduce the influence of slight silt to biochemical system.

Description

A sewage treatment device capable of removing fine sediment

technical field

The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment device capable of removing fine sediment.

Background technique

In recent years, most urban sewage treatment plants in my country have adopted the method of canceling or surpassing the primary sedimentation tank in the sewage treatment process, mainly to ensure the carbon source required in the process of biological nitrogen and phosphorus removal in sewage. . However, the setting of the urban sewage treatment plant allows the fine sediment (<200um) that could have been removed in the primary sedimentation tank to enter the biochemical system and gradually accumulate in the biochemical system. In addition, there are serious rain and sewage mixed flow and soil erosion in cities in my country, which makes the siltation in the biochemical system more and more serious. The accumulation of silt will increase with the increase of time, and the particle size >70um will be deposited at the bottom of the biochemical tank due to its own gravity; the fine sediment with particle size ≤70um will be in different states due to different particle sizes, and some are suspended. Some will be caught by activated sludge nets; fine sediment with smaller particle size is difficult to remove. The accumulation of fine sediment in the biochemical system will cause problems such as decreased activated sludge activity, increased effluent turbidity, and blockage of aeration settings, which makes the subsequent treatment of activated sludge more difficult. Therefore, to reduce the impact of fine sediment on the biochemical system, it is very necessary to strongly remove the fine sediment in the sewage.

my country's urban sewage treatment plants mainly use the principles of filtration separation, gravity sedimentation and centrifugal sedimentation to remove fine sediment in sewage. Filtration and separation is that under the action of external force, the solids of the mixed liquid are trapped through the pores of the porous medium, so as to realize the solid and separation of the heterogeneous material system. Some fabric media, such as (screens, filter cloths), can generally retain inorganic particles with a particle size of more than 5 μm, but the filter media will become blocked over time and need to be cleaned. The traditional advection grit chamber uses gravity sedimentation to remove fine sediment in sewage, and the aerated grit chamber uses aeration to increase the collision probability between sediments for sedimentation. These two kinds of grit chambers use the gravity of the sediment to settle, but based on the sand removal effect of these two kinds of grit chambers, the treatment effect of fine sediment is not very good.

Utility model content

The purpose of the present utility model is to overcome the above-mentioned problems existing in the conventional technology, and to provide a sewage treatment device capable of removing fine sediment.

In order to realize the above-mentioned technical purpose and achieve the above-mentioned technical effect, the present invention is realized through the following technical solutions:

A sewage treatment device capable of removing fine sediment, comprising a box body, the inside of the box body is provided with a cyclone, the upper side of the cyclone is connected with a water inlet pipe running through the side plate of the box body, the The bottom of the cyclone is provided with a sand collecting hopper running through the bottom plate of the box body, the lower end of the sand collecting hopper is provided with a sand discharge pipe with a discharge valve, the top of the cyclone is provided with an overflow pipe, and the box The inner cavity is located on the outer side of the overflow pipe and is fixed with an upper partition plate, and is located on the outer side of the sand collecting bucket and is fixed with a lower partition plate. The area between the upper clapboard and the lower clapboard is provided with a sand and gravel filter layer and a pad material layer below it. An annular support box is fixed below the layer, the upper end of the annular support box is an opening, and the lower end is connected with a backwash pipe running through the side of the box body.

Further, in the above-mentioned sewage treatment device capable of removing fine sediment, legs are fixed at the four corners of the bottom side of the box body, and the bottom ends of the legs are equipped with moving rollers; the side ends of the legs are rotatably connected. There is an installation block, and a positioning rod is slidably connected in the installation block.

Further, in the above-mentioned sewage treatment device capable of removing fine sediment, shaft seals are installed on the box body at the penetration of each pipe body on the box body.

Further, in the above-mentioned sewage treatment device capable of removing fine sediment, the discharge valve of the sand discharge pipe is composed of an upper discharge valve and a lower discharge valve. When the sand is not discharged, the upper discharge valve is in an open state. The lower discharge valve is closed; when sand is discharged, the upper discharge valve is closed and the lower discharge valve is open.

Further, in the above-mentioned sewage treatment device capable of removing fine sediment, the height of the horizontal position of the respective plate bodies of the upper baffle and the lower baffle gradually decreases from the center to the edge.

Further, in the above-mentioned sewage treatment device capable of removing fine sediment, the respective pipe bodies of the sewage pipe and the drain pipe are provided with an opening valve.

Further, in the above-mentioned sewage treatment device capable of removing fine sediment, the sand filter layer is formed by stacking quartz sand filter media with a particle size of 0.4 mm.

Further, in the above-mentioned sewage treatment device capable of removing fine sediment, the thickness of the sand and gravel filter layer is 250-350 mm.

Further, in the above-mentioned sewage treatment device capable of removing fine sediment, the bedding layer is formed by stacking quartz sand filter materials with a particle size of 2 mm.

Further, in the above-mentioned sewage treatment device capable of removing fine sediment, the thickness of the bedding layer is 80-120 mm.

The beneficial effects of the present utility model are:

The structure design of the utility model is reasonable. First, the water conservancy cyclone and the sand and gravel filtration technology are used to treat the sewage, firstly, the cyclone is used to remove the large particles of sediment in the sewage, and then the sand and gravel filter layer and the bedding layer are used to remove Fine sediment can effectively remove fine sediment smaller than 200μm in sewage, thereby reducing the impact of fine sediment on the biochemical system.

Of course, any product implementing the present invention does not necessarily need to achieve all the above advantages at the same time.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the overall structural representation of the utility model;

Fig. 2 is the principle schematic diagram of the cyclone in the utility model;

Fig. 3 is the bottom view structure schematic diagram of the middle and upper clapboard of the utility model;

Fig. 4 is the top-view structure schematic diagram of the middle and lower partition plates of the present utility model;

Fig. 5 is the structural representation of the annular tray in the utility model;

In the accompanying drawings, the list of components represented by each number is as follows:

1-box, 2-cyclone, 201-sand bucket, 202-sand discharge pipe, 203-upper discharge valve, 204-lower discharge valve, 3-water inlet pipe, 4-overflow pipe, 5- Upper baffle, 6-sand filter layer, 7-bed material layer, 8-sewage pipe, 9-ring tray, 10-backwash pipe, 11-lower baffle, 12-drain pipe.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Please refer to FIGS. 1-5 . This embodiment is a sewage treatment device capable of removing fine sediment, including a box body 1 , and a cyclone 2 is arranged inside the box body 1 . The upper end of the cyclone 2 is connected with a water inlet pipe 3 that penetrates the side plate of the box body 1. The bottom of the cyclone 2 is provided with a sand collecting bucket 201 that penetrates the bottom plate of the box body 1. The lower end of the sand collecting bucket 201 is provided with a belt drain. The sand discharge pipe 202 of the material valve. The top of the cyclone 2 is provided with an overflow pipe 4 , the inner cavity of the box 1 is located outside the overflow pipe 4 and is fixed with an upper baffle 5 , and is located outside the sand collecting bucket 201 and has a lower baffle 11 fixed. The plate bodies of the upper partition plate 5 and the lower partition plate 11 are evenly provided with water equalizing holes, and the horizontal position heights of the respective plate bodies of the upper partition plate 5 and the lower partition plate 11 gradually decrease from the center to the edge. The edges of the upper partition 5 and the lower partition 11 are sealed and fixed to the inner wall of the box body 1 .

In this embodiment, the inner cavity of the box body 1 is located in the area between the upper partition plate 5 and the lower partition plate 11 with a sand and gravel filter layer 6 and a cushion layer 7 located below it, and the box body 1 is located in the sand and stone filter layer 6 A sewage pipe 8 is externally connected to the side of the upper cavity, and an annular support box 9 is fixed under the pad material layer 7 . The upper end of the annular support box 9 is open, the lower end is connected with a backwash pipe 10 penetrating the side of the box body 1 , and a drain pipe 12 is externally connected to the bottom plate of the cavity below the lower partition plate 11 . A support net is provided between the annular tray 9 and the cushion layer 7 to provide support for the cushion layer.

In this embodiment, the respective pipe bodies of the drain pipe 8 and the drain pipe 12 are equipped with opening valves. The box body 1 is provided with shaft seals at the penetration of each pipe body on it.

In this embodiment, the discharge valve of the sand discharge pipe 202 is composed of an upper discharge valve 203 and a lower discharge valve 204. When the sand is not discharged, the upper discharge valve 203 is open and the lower discharge valve 204 is closed. ; When the sand is discharged, the upper discharge valve 203 is closed, and the lower discharge valve 204 is opened. This design is to prevent sewage from flowing out of the sand discharge port during sand discharge, causing water pollution to the surrounding environment.

In this embodiment, the sand and gravel filter layer is formed by stacking quartz sand filter materials with a particle size of 0.4 mm, and the thickness of the sand and gravel filter layer is 250-350 mm. The bedding layer is formed by stacking quartz sand filter media with a particle size of 2mm, and the thickness of the bedding layer is 80-120mm.

In this embodiment, legs 13 are fixed at the four corners of the bottom side of the box body 1, and the bottom ends of the legs 13 are equipped with moving rollers 14; There are positioning rods 16 .

In this embodiment, the design dimensions of the cyclone 2 are shown in Table 1 below:

Table 1 Cyclone Design Dimensions

A specific application of this embodiment is: the raw water enters the cyclone 2 tangentially from the water inlet pipe 3, and goes down the outer vortex flow path in the main cylinder separation area of the cyclone 2. Due to the different density of fine sediment and sewage, The larger fine particles are thrown to the wall of the cylinder by the inertia centrifugal force, and the fine sediment settles along the wall to the sand collecting bucket 201, and the sand is discharged by the discharge valve, while the smaller fine sediment in the sewage goes up the inner vortex with the sewage. The flow path is discharged from the central overflow pipe 4 to the water collection area above the upper baffle 5; the cone of the above-mentioned cyclone 1 is higher than the cylinder, and the cone has a certain length to increase the number of spiral turns, thereby increasing the residence time. In the process of rising, some particles will settle due to their own gravity; the sewage in the catchment area flows evenly to the sand and gravel filter material layer 6 through the water uniform holes of the upper baffle 5. When the sewage passes through the sand and gravel filter material layer 6, the sand The stone filter material layer 6 can retain the fine particles that are not removed by the cyclone 2, the sand and stone filter layer 6 is a quartz sand filter material layer, and the lower part is a bedding material layer with larger particles. The treated water is discharged from the drain pipe 12 into the next-stage reactor.

There is a backwashing pipe 10 under the sand and gravel filtering part of the device. After the sand and gravel filtering runs for a period of time, fine sediment will be trapped on the medium, and a pressure difference will be generated at the outlet. When the pressure difference reaches a certain value, through the reverse The flushing water cleans the sand and gravel filter area, and the flushed waste water is discharged from the sewage pipe 8. When the backwash pipe 10 does not work, the opening valve of the sewage pipe 8 is in a closed state.

The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiment does not describe all the details, nor does it limit the utility model to only specific embodiments. Obviously, many modifications and variations are possible in light of the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims (10)

1. The utility model provides a can get rid of sewage treatment plant of fine silt, includes the box, its characterized in that: a swirler is arranged in the box body, the upper side end of the swirler is connected with a water inlet pipe penetrating through the side plate of the box body, the bottom of the cyclone is provided with a sand collecting hopper which penetrates through the bottom plate of the box body, the lower end of the sand collecting hopper is provided with a sand discharge pipe with a discharge valve, the top end of the cyclone is provided with an overflow pipe, an upper baffle plate is fixed at the outer side of the overflow pipe in the inner cavity of the box body, a lower baffle plate is fixed at the outer side of the sand collecting hopper, the plate bodies of the upper clapboard and the lower clapboard are evenly provided with water equalizing holes, the area of the inner cavity of the box body between the upper clapboard and the lower clapboard is provided with a sand filtering layer and a padding layer positioned below the sand filtering layer, the side part of the box body, which is positioned at the cavity above the sandstone filtration layer, is externally connected with a drain pipe, an annular supporting box is fixed below the padding layer, the upper end of the annular support box is provided with an opening, the lower end of the annular support box is communicated with a back-flushing pipe penetrating through the side part of the box body, and a bottom plate of a cavity below the lower partition plate is externally connected with a drain pipe.

2. The sewage treatment plant capable of removing fine silt according to claim 1, wherein: supporting legs are fixed at four corners of the bottom side of the box body, and moving rollers are mounted at the bottom ends of the supporting legs; the side of landing leg rotates and is connected with the installation piece, sliding connection has the locating lever in the installation piece.

3. The sewage treatment plant capable of removing fine silt according to claim 1, wherein: shaft seals are arranged at the penetrating positions of the pipe bodies on the box body.

4. The sewage treatment plant capable of removing fine silt according to claim 1, wherein: the discharge valve of the sand discharge pipe is composed of an upper discharge valve and a lower discharge valve, when sand is not discharged, the upper discharge valve is in an open state, and the lower discharge valve is in a closed state; when the sand is discharged, the upper discharging valve is in a closed state, and the lower discharging valve is in an open state.

5. The sewage treatment plant capable of removing fine silt according to claim 1, wherein: the horizontal position height of the respective plate bodies of the upper partition plate and the lower partition plate is gradually reduced from the center to the edge.

6. The sewage treatment plant capable of removing fine silt according to claim 1, wherein: and the respective pipe bodies of the sewage discharge pipe and the drain pipe are provided with opening valves.

7. The sewage treatment plant capable of removing fine silt according to claim 1, wherein: the sand filtering layer is formed by stacking quartz sand filtering materials with the particle size of 0.4 mm.

8. The sewage treatment plant capable of removing fine silt according to claim 7, wherein: the thickness of the sand filtration layer is 250-350 mm.

9. The sewage treatment plant capable of removing fine silt according to claim 1, wherein: the bedding layer is formed by stacking quartz sand filter materials with the particle size of 2 mm.

10. The sewage treatment plant capable of removing fine silt according to claim 9, wherein: the thickness of the padding layer is 80-120 mm.

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