CN218794477U - Hydraulic cyclone grit chamber for initial rainwater treatment - Google Patents

Abstract

The utility model discloses a hydrocyclone grit chamber for initial rainwater treatment, which comprises a pool body, a basket grille, a spoiler, a sand bucket, a closed diversion pipe, a sand discharge pipe, and a vacuum sand discharge system; The side wall of the pool body is provided with a water inlet pipe and a water outlet pipe, and the water outlet of the water inlet pipe is flush with the basket grille, and is placed at the side wall opening of the basket grille; the side wall of the basket grille opposite to the opening is set There is a baffle; the spoiler is vertically arranged on the inner wall of the pool, and its inclination direction is opposite to the direction of the water flow; the sand bucket is placed below the center of the bottom of the pool body; a vent pipe is arranged at the bottom of the sand bucket; On the central axis of the pool body, its upper end is fixed on the pool body through a connecting piece; the sand discharge pipe passes through the closed diversion pipe and extends into the sand bucket; the vacuum sand discharge system is connected with the sand discharge pipe, and through the vacuum sand discharge system The sand in the sand bucket can be discharged. The utility model can effectively remove the sand in the initial rainwater, intercept the floating objects in the initial rainwater, and improve the pretreatment effect of the initial rainwater.

Description

A hydrocyclone grit chamber for primary rainwater treatment

technical field

The utility model belongs to the field of sewage treatment, in particular to a hydrocyclone grit chamber for initial rainwater treatment.

Background technique

The amount of pollutants carried by the initial rainwater is large and various, such as a large amount of COD, sand, and domestic garbage. If the initial rainwater is not properly pretreated, it will cause siltation and blockage of the urban rainwater pipe network. If it enters the sewage plant for treatment later, it will also affect the biological treatment effect.

Due to the low BOD content in the initial rainwater, biological methods are not suitable for treatment. At present, physical and chemical methods are mostly used for pretreatment. The grit chamber is a commonly used rainwater pretreatment structure, which is mostly used in the purification treatment of road rainwater runoff, lifting pump stations and pretreatment of storage tanks. The existing grit chambers are usually cyclone grit chambers and aerated grit chambers. The aerated grit chamber is mostly used in the pretreatment of urban sewage treatment plants, while the cyclone grit chamber is suitable for the pretreatment of sewage plants and the treatment of initial rainwater, and compared with the aerated grit chamber, it does not require aeration and costs Advantages of low energy consumption. The sand-water separation principle of the cyclone grit chamber is to separate sand, organic matter, water, etc. with different specific gravity through the vortex effect generated by the water flow entering from the tangential direction. Existing swirling flow grit chambers generally include Bickert grit chambers and bell-type grit chambers, and stirring equipment needs to be installed in the ponds. The hydrocyclone grit chamber is also a kind of cyclone grit chamber. This kind of cyclone grit chamber does not need stirring, and only relies on the action of hydraulic force to separate sand particles.

At present, the effluent of the hydrocyclone grit chamber still contains a lot of sand, and due to structural reasons, some floating objects will also flow out with the effluent and accumulate in the pipeline to cause blockage. Therefore, there is an urgent need for a new hydrocyclone grit chamber to improve the grit effect and remove the floating objects in the initial rainwater.

Utility model content

The purpose of the utility model is to provide a hydrocyclone grit chamber for initial rainwater treatment. The hydrocyclone grit chamber can effectively remove sand particles in the initial rainwater, intercept floating objects in the initial rainwater, and improve the initial rainwater quality. preprocessing effect.

The technical scheme adopted in the utility model is:

A hydrocyclone grit chamber for initial rainwater treatment, which includes a tank body, a basket grille, a spoiler, a sand bucket, a closed diversion pipe, a sand discharge pipe, and a vacuum sand discharge system;

The side wall of the pool body is provided with a water inlet pipe and an outlet pipe, and the outlet pipe is higher than the water inlet pipe; the bottom of the pool body is a funnel-shaped bottom;

The water outlet of the water inlet pipe is flush with the basket grille, and placed at the side wall opening of the basket grille; the side wall of the basket grille opposite to the opening is provided with a baffle;

There are multiple spoilers, which are vertically arranged on the inner wall of the pool, and their inclination direction is opposite to the direction of water flow;

The sand bucket is placed below the center of the bottom of the pool body, and the top of the sand bucket is connected to the funnel-shaped bottom; a vent pipe with a valve is provided at the bottom of the sand bucket, and the valve is manually opened to vent;

The closed draft tube is placed on the central axis of the pool body, and its upper end is fixed on the pool body through a connecting piece;

The bottom and the center of the top of the closed draft pipe have a round hole respectively, which is used to pass through the sand discharge pipe; the sand discharge pipe passes through the round hole of the closed draft pipe and extends into the sand bucket;

The vacuum sand discharge system is connected with the sand discharge pipe, and the sand in the sand bucket can be discharged through the vacuum sand discharge system.

According to the above solution, the spoiler is a rectangular plate, which forms an included angle of less than 90° with the tangent line of the inner wall of the tank, so as to better promote the settlement of sand particles.

According to the above scheme, the upper end of the spoiler directly below the water inlet pipe is flush with the bottom of the water inlet pipe, and the lower end is flush with the upper surface of the funnel-shaped bottom; The upper surface of the shaped bottom is flush to better promote the settlement of sand particles.

According to the above scheme, the side of the funnel-shaped bottom forms an angle of 55° with the horizontal plane, so that the sand in the pool body flows into the sand bucket.

According to the above scheme, the lower end of the closed draft pipe is a downward bell mouth, and the diameter of the bottom of the bell mouth is larger than the diameter of the sand bucket, so as to prevent the sand in the sand bucket from entering the pool body again.

According to the above scheme, the vertical distance between the bottom edge of the bell mouth of the closed draft tube and the side wall at the bottom of the funnel mouth of the pool body is 200mm, forming a passage for sand to facilitate sand sliding into the sand bucket.

According to the above solution, the lower part of the sand discharge pipe is a downward bell mouth, and the bottom of the bell mouth has a certain distance from the bottom of the sand bucket, so as to facilitate sand discharge.

According to the above scheme, the basket grille is connected to the top of the pool body through a handle; the top of the basket grille is provided with a grille cover plate; the top of the pool body is provided with a square hole through which the dirt accumulated in the basket grille Conditions and removal and installation of the basket grille; when there are many impurities in the basket grille, open the grille cover to clean the impurities directly on the basket grille; of course, the basket grille can also be taken out for cleaning.

According to the above scheme, the upper end of the baffle is flush with the upper end of the basket grille, and the lower end of the baffle is flush with the bottom of the water inlet pipe, so as to prevent incoming water from directly passing through the opposite side of the grille and entering the outlet pipe to form a short circuit.

According to the above scheme, the sand bucket is a circular groove, and the vertical section of the bottom of the sand bucket is in an inverted trapezoidal structure, so as to better collect sand.

According to the above scheme, the vacuum sand discharge system is equipped with a start button, which can be manually activated for regular sand discharge, or it can be set for regular automatic sand discharge.

According to the above scheme, the grid surface of the basket adopts a square grid structure, and the shape of the grid is a cuboid.

According to the above solution, there are a plurality of connecting parts, which are equidistantly arranged around the closed draft tube. The top of the closed diversion pipe is at the same height as the top of the pool body, and there is a water passage between the outside of the closed draft tube and the inside of the pool body. The spoiler is equidistantly arranged on the inner wall of the pool.

The beneficial effects of the utility model are:

By setting the spoiler and closing the diversion pipe, the water flow can be better generated to vortex, and the sand and water with different specific gravity can be separated;

By designing the bottom of the pool body into a funnel shape, it is convenient for sand particles to enter the sand hopper along the funnel;

By setting the basket grille, it is convenient to intercept large particles of impurities and domestic garbage (floating objects) in the initial rainwater, reduce the processing load of the grit chamber, and facilitate cleaning;

The setting of the basket grille is also convenient to reduce the sand content of the effluent of the grit chamber;

A baffle is set on the side of the basket grille opposite to the side where the water inlet pipe extends, and a closed structure is set on the side of the basket grille away from the water inlet pipe to block the water flow and prevent the water flow from directly passing through the basket grille to the water outlet area, thus forming Short circuit, reducing the grit effect of the grit chamber;

By setting the spoiler, the water flow can be disturbed, the flow energy of the water can be reduced, the sand particles can be promoted to settle, and the sand removal effect can be improved;

The outer edge of the trumpet-shaped structure at the bottom of the closed draft tube is larger than the inner diameter of the sand bucket, which can prevent the sand particles falling into the sand bucket from returning to the pool under the disturbance of the water flow and flow out with the water flow, maintaining a stable sand removal effect;

Compared with air lift sand discharge, the vacuum sand discharge system is not easily affected by the sand discharge height. For rainwater treatment stations without compressed air source, there is no need to set up a separate compressed air system, which is convenient and energy-saving, and has two functions of manual start and automatic start. , easy to operate and manage;

The grit chamber of the utility model is not only suitable for initial rainwater treatment with many impurities and sand particles, but also can be used for pretreatment of urban sewage mixed with rainwater.

Description of drawings

The utility model will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Fig. 1 is the structural representation of the hydrocyclone grit chamber used for initial rainwater treatment;

Fig. 2 is 1-1 sectional view in Fig. 1;

Fig. 3 is the top view structural representation of the hydrocyclone grit chamber used for initial rainwater treatment;

Fig. 4 is a schematic diagram of the connection structure of the basket grille and the water inlet pipe;

In the figure: 1-pool body, 2-inlet pipe, 3-outlet pipe, 4-closed diversion pipe, 5-sand discharge pipe, 6-connector, 7-basket grille, 8-spoiler, 9- Sand bucket, 10-funnel-shaped bottom, 11-vacuum sand discharge system, 12-start button, 13-venting pipe, 14, baffle.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Referring to Figures 1-4, a hydrocyclone grit chamber for initial rainwater treatment, which includes a pool body 1, basket grille 7, spoiler 8, sand bucket 9, closed diversion pipe 4, sand discharge Pipe 5, vacuum sand discharge system 11.

The top of the pool body 1 is provided with a first round hole and a square hole (the round hole is placed in the center of the top), and the side wall of the pool body 1 is provided with an inlet pipe 2 and an outlet pipe 3, and the outlet pipe 3 is higher than the inlet pipe 2; The bottom of the pool body 1 is a funnel-shaped bottom 10, and the sides of the funnel-shaped bottom 10 form an angle of 55° with the horizontal plane. The basket grille 7 is placed below the square hole; the water outlet of the water inlet pipe 2 is flush with the basket grille 7, and placed at the side wall opening of the basket grille 7; the side wall of the basket grille 7 opposite to the opening is set Baffle plate 14 is arranged, and the upper end of baffle plate 14 is flush with the upper end of basket grid 7, and the lower end of baffle plate 14 is flush with the bottom of water inlet pipe 2. The basket grid 7 is connected with the top of the pool body 1 through a handle. For ease of operation, a grid cover plate can be set on the top of the basket grid 7 . During use, observe the dirt accumulation in the basket grille 7 through the square hole and disassemble and install the basket grille 7; when there are many impurities in the basket grille 7, the grille cover can be opened to clean it directly. In this embodiment, the grid surface of the basket grid 7 adopts a square grid structure, and the grid shape is a cuboid. The spoiler 8 is a rectangular plate, and there are multiple, vertically spaced on the inner wall of the pool body 1, and the spoiler 8 and the tangent line of the inner wall of the pool body 1 form an angle less than 90° (preferably an angle less than 60°) , and make sure that the direction of inclination is opposite to the direction of water flow. In this embodiment, the upper end of the spoiler 8 directly below the water inlet pipe is flush with the bottom of the water inlet pipe 2, and the lower end is flush with the upper surface of the funnel-shaped bottom 10; Flush, the lower end is flush with the upper surface of the funnel-shaped bottom 10. The sand bucket 9 is a circular groove, placed below the center of the bottom of the pool body 1, connected to the funnel-shaped bottom 10, and the vertical section of the bottom of the sand bucket 9 is an inverted trapezoidal structure. The bottom of the sand bucket 9 is provided with a vent pipe 13 with a valve, which can be vented after the valve is opened manually. After the closed draft tube 4 passes through the first circular hole at the top of the pool body 1, it is fixed in the pool body 1 by the connecting piece 6 and placed on the central axis of the pool body 1. The lower end of the closed draft pipe 4 is a downward bell mouth, and the diameter of the bottom of the bell mouth is greater than the diameter of the sand bucket 9 . In this embodiment, the vertical distance between the bottom edge of the bell mouth of the closed draft tube 4 and the side wall of the funnel-shaped bottom 10 of the cell body 1 is 200 mm. The bottom of the closed draft tube 4 and the center of the top respectively have a circular hole, and the sand discharge pipe 5 passes through 2 circular holes of the closed draft tube 4 successively and stretches into the sand bucket 9. The bottom of the sand discharge pipe 5 is a downward bell mouth, and there is a certain distance between the bottom of the bell mouth and the bottom of the sand bucket 9 . The vacuum sand discharge system 11 is connected with the sand discharge pipe 5, and the vacuum sand discharge system 11 is provided with a start button 12, which can be manually started to discharge the sand regularly, or can be set to automatically discharge sand regularly.

Brief description of working principle:

The initial rainwater enters the pool body 1 through the water inlet pipe 2, and after passing through the basket grille 7, large particles of sand and domestic waste are intercepted by the basket grille 7, and because the side facing the basket grille 7 and the water inlet pipe 2 is a closed structure (As shown in Figure 4, a baffle plate 14 is provided in the height from elevation a to elevation b, which is a closed surface, and the height from elevation b to elevation c is a grid surface), sewage will not directly pass through the basket grille 7 pairs of sides into the pool or Into the outlet pipe 3, but is blocked, first enter the pool from the lower part of the basket grille 7, under the action of the closed diversion pipe 4, the water flows around the outer ring, thereby forming a centrifugal force and generating a vortex; , continuously hitting the spoiler 8 on the inner wall of the pool body 1, reducing the kinetic energy. After the kinetic energy is reduced, the fine sand particles carried by the water flow are more likely to be thrown towards the pool by centrifugal force, and then settle down, and then follow the funnel-shaped bottom 10, from the funnel The gap between the shaped bottom 10 and the lower horn structure of the closed draft tube 4 slides into the sand bucket 9; after the sand accumulates to a certain extent in the sand bucket 9, it submerges the bottom of the sand discharge pipe 5, and at the same time due to the presence of sand in the sand bucket 9 Sewage, at this time, press the start button 12 of the vacuum sand discharge system 11 on the top of the grit chamber to draw a vacuum in the sand discharge pipe 5, and the sand in the sand bucket 9 is lifted under the action of the vacuum suction force and flows along the sand discharge pipe. 5 discharge to the outside of the pool. The bottom of the sand discharge pipe 5 is a downward bell mouth, which can increase the sand suction area. Simultaneously, because the large grains of sand are all trapped by the basket grid 7, the possibility of blocking the sand discharge pipe 5 nozzles can be reduced. When the staff observes that the discharged sand-water mixture is relatively clear at the sand outlet of the sand discharge pipe 5, they can close the start button 12 of the vacuum sand discharge system 11 to stop the sand discharge. According to the manual sand discharge experience accumulated for a long time, the vacuum sand discharge system 11 can be set to start sand discharge at regular intervals to save manpower. For qualified sewage treatment stations and sewage plants, according to the actual situation, high-pressure water flushing settings can be added to flush the sand discharge pipe 5 regularly. After the water flows around the pool wall for one or several laps, it enters the outlet pipe 3 and is discharged out of the pool.

On the top of the grit chamber, you can observe the dirt accumulation in the basket grill 7 through the cover plate of the basket grill 7 or the square hole on the top of the tank body 1. If there is more dirt in the grill, you can lift the basket grill 7 Clean up or directly open the grille cover to clean up the dirt in the basket grille. If you want to clean the grit chamber after long-term operation, you can stop the water intake, open the valve on the bottom vent pipe 13, empty the water in the pond, and then take out the basket grille 7, and the staff enter the pond through the square hole to clean the spoiler 8 and other parts, after cleaning, close the valve on the vent pipe 13, install the basket grid 7, re-intake, and the grit chamber enters the operation stage again.

The utility model enhances the pollution interception effect, prevents large particles of impurities and garbage from entering the pool to cause blockage, and enhances the turbulence effect on the water flow, further improves the sand removal rate, and does not require stirring paddles, reducing power consumption; adopts a vacuum sand discharge system 11 Sand discharge, easy to operate, has two modes of manual start and automatic operation, which saves the compressed air pipeline and equipment used in traditional grit chambers for air lift and sand discharge, saves operation and maintenance costs, and has high economic benefits.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should belong to the protection scope of the appended claims of the present utility model.

Claims (10)

1. A hydrocyclone grit chamber for initial rainwater treatment, characterized in that: it comprises a pool body, a basket grille, a spoiler, a sand bucket, a closed diversion pipe, a sand discharge pipe, and a vacuum sand discharge system; The side wall of the pool body is provided with a water inlet pipe and an outlet pipe, and the outlet pipe is higher than the water inlet pipe; the bottom of the pool body is a funnel-shaped bottom; The water outlet of the water inlet pipe is flush with the basket grille, and placed at the side wall opening of the basket grille; the side wall of the basket grille opposite to the side wall of the opening is provided with a baffle; There are multiple spoilers, which are vertically arranged on the inner wall of the pool, and their inclination direction is opposite to the direction of water flow; The sand bucket is placed below the center of the bottom of the pool body, and the top of the sand bucket is connected to the funnel-shaped bottom; a vent pipe with a valve is provided at the bottom of the sand bucket; The closed draft tube is placed on the central axis of the pool body, and its upper end is fixed on the pool body through a connecting piece; The sand discharge pipe passes through the closed draft pipe and extends into the sand bucket; The vacuum sand discharge system is connected with the sand discharge pipe, and the sand in the sand bucket can be discharged through the vacuum sand discharge system. 2. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, characterized in that: the spoiler is a rectangular plate, and the tangent to the inner wall of the tank forms an included angle of less than 90°. 3. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, characterized in that: the upper end of the spoiler directly below the water inlet pipe is flush with the bottom of the water inlet pipe, and the lower end is flush with the funnel-shaped bottom. The surface is flush; the upper ends of the remaining spoilers are flush with the top elevation of the water outlet pipe, and the lower ends are flush with the upper surface of the funnel-shaped bottom. 4. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, characterized in that: the side of the funnel-shaped bottom forms an included angle of 55° with the horizontal plane. 5. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, characterized in that: the lower end of the closed draft pipe is a downward bell mouth, and the diameter of the bell mouth is larger than that of the sand bucket. diameter. 6. The hydrocyclone grit chamber for initial rainwater treatment according to claim 5, characterized in that: the vertical distance between the bottom edge of the bell mouth of the closed draft tube and the side wall at the bottom of the funnel mouth of the pool body is 200mm. 7. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, characterized in that: the bottom of the sand discharge pipe is a downward bell mouth, and the bottom of the bell mouth is in contact with the bottom of the sand bucket. There is a certain distance from the bottom. 8. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, characterized in that: the basket grille is connected to the top of the pool body through a handle; the top of the basket grille is provided with a grille cover plate; the top of the pool body is provided with a square hole through which the dirt accumulation in the basket grille can be observed and the basket grille can be disassembled and installed. 9. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, characterized in that: the upper end of the baffle is flush with the upper end of the basket grille, and the lower end of the baffle is flush with the bottom of the inlet pipe flush. 10. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, characterized in that: the cross-section of the bottom of the sand bucket is an inverted trapezoid.

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