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

Abstract

The utility model discloses a hydraulic cyclone grit chamber for initial rainwater treatment, which comprises a chamber body, a basket grid, a spoiler, a sand hopper, a closed diversion pipe, a sand discharge pipe and a vacuum sand discharge system; a water inlet pipe and a water outlet pipe are arranged on the side wall of the tank body, and the water outlet of the water inlet pipe is flush with the basket grid and is arranged at the opening of the side wall of the basket grid; a baffle is arranged on the side wall of the basket grid opposite to the opening; the spoiler is vertically arranged on the inner wall of the tank body, and the inclination direction of the spoiler is opposite to the water flow direction; the sand hopper is arranged below the center of the bottom of the tank body; the bottom of the sand hopper is provided with an emptying pipe; the closed guide pipe is arranged on the central axis of the tank body, and the upper end of the closed guide pipe is fixed on the tank body through a connecting piece; the sand discharge pipe penetrates through the closed guide pipe and extends into the sand hopper; the vacuum sand discharge system is communicated with the sand discharge pipe, and sand in the sand hopper can be discharged through the vacuum sand discharge system. The utility model discloses can effectively get rid of the sand in the initial stage rainwater to and intercept the floater in the initial stage rainwater, improve initial stage rainwater preliminary treatment effect.

Description

Hydraulic cyclone grit chamber for initial rainwater treatment

Technical Field

The utility model belongs to the sewage treatment field, concretely relates to hydraulic cyclone grit chamber for initial stage rainwater is handled.

Background

The pollutant that initial stage rainwater carried is a large amount and kind many, for example contain a large amount of COD, sand grain, domestic waste etc. if it is improper to preliminary stage rainwater preliminary treatment, can cause cities and towns rainwater pipe network siltation to block up, if later stage gets into the sewage factory and handles, also can influence the biological treatment effect.

Because the BOD content in the initial rainwater is low, the rainwater is not suitable for being treated by a biological method, and at present, the rainwater is mostly pretreated by a physical and chemical method. The grit chamber is a commonly used rainwater pretreatment structure and is mostly applied to the pretreatment of road rainwater runoff purification treatment, lifting pump stations and storage tanks. The existing grit chambers are generally cyclone grit chambers and aeration grit chambers. The aeration grit chamber is mainly applied to pretreatment of urban sewage treatment plants, while the rotational flow grit chamber is suitable for pretreatment and initial rainwater treatment of sewage treatment plants, and has the advantages of no need of aeration, low manufacturing cost and low energy consumption compared with the aeration grit chamber. The sand-water separation principle of the cyclone grit chamber is to separate sand grains, organic matters, water and the like with different specific gravities through the vortex action generated by water flow entering from the tangential direction. The existing cyclone grit chamber generally comprises a Bischt grit chamber and a bell-type grit chamber, and stirring equipment is required to be arranged in the chambers. The hydraulic cyclone grit chamber is also one of cyclone grit chambers, and the cyclone grit chamber does not need stirring and only relies on the action of water force to separate sand grains.

At present, the effluent of the hydrocyclone sand basin still contains a lot of sand, and due to structural reasons, part of floating objects can flow out along with the effluent, so that blockage is caused after accumulation in a pipeline. Therefore, a new hydraulic cyclone sand basin is urgently needed, the sand settling effect is improved, and floating objects in initial rainwater are removed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a water conservancy whirl grit chamber for initial stage rainwater is handled, this water conservancy whirl grit chamber can effectively get rid of the sand grain in the initial stage rainwater to and intercept the floater in the initial stage rainwater, improve initial stage rainwater preliminary treatment effect.

The utility model adopts the technical proposal that:

a hydrocyclone sand basin for initial rainwater treatment comprises a basin body, a basket grid, a spoiler, a sand hopper, a closed guide pipe, a sand discharge pipe and a vacuum sand discharge system;

a water inlet pipe and a water outlet pipe are arranged on the side wall of the tank body, and the water outlet pipe is higher than the water inlet pipe; the bottom of the tank body is a funnel-shaped bottom;

the water outlet of the water inlet pipe is flush with the basket grid and is arranged at the opening of the side wall of the basket grid; a baffle is arranged on the side wall of the basket grid opposite to the opening;

the turbulence plates are vertically arranged on the inner wall of the tank body, and the inclination direction of the turbulence plates is opposite to the water flow direction;

the sand hopper is arranged below the center of the bottom of the tank body, and the upper part of the sand hopper is connected with the funnel-shaped bottom; an emptying pipe with a valve is arranged at the bottom of the sand hopper, and emptying is performed after the valve is manually opened;

the closed guide pipe is arranged on the central axis of the tank body, and the upper end of the closed guide pipe is fixed on the tank body through a connecting piece;

the centers of the bottom and the top of the closed guide pipe are respectively provided with a round hole for penetrating through the sand discharge pipe; the sand discharge pipe penetrates through the round hole of the closed guide pipe and extends into the sand hopper;

the vacuum sand discharge system is communicated with the sand discharge pipe and can discharge sand in the sand hopper.

According to the scheme, the spoiler is a rectangular plate, and an included angle smaller than 90 degrees is formed between the spoiler and the tangent line of the inner wall of the tank body, so that sand sedimentation is promoted better.

According to the scheme, the upper end of the spoiler right below the water inlet pipe is flush with the pipe bottom of the water inlet pipe, and the lower end of the spoiler is flush with the upper surface of the funnel-shaped bottom; the upper ends of the other spoilers are flush with the elevation of the top of the water outlet pipe, and the lower ends of the other spoilers are flush with the upper surface of the funnel-shaped bottom, so that sand sedimentation is promoted better.

According to the scheme, the side edge of the funnel-shaped bottom and the horizontal plane form an included angle of 55 degrees, so that sand in the pool body can flow into the sand hopper conveniently.

According to the scheme, the lower end of the closed guide pipe is provided with the downward horn mouth, and the diameter of the bottom of the horn mouth is larger than that of the sand hopper, so that the sand in the sand hopper is prevented from entering the pool body again.

According to the scheme, the vertical distance between the edge of the bottom of the bell mouth of the closed guide pipe and the side wall of the bottom of the funnel mouth of the tank body is 200mm, so that a sand passage is formed, and sand can conveniently slide into a sand hopper.

According to the scheme, the lower part of the sand discharge pipe is provided with the downward horn mouth, and the bottom of the horn mouth has a certain distance with the bottom of the sand hopper, so that the sand can be discharged conveniently.

According to the scheme, the basket grille is connected with the top of the tank body through the handle; the top of the basket grating is provided with a grating cover plate; a square hole is formed in the top of the tank body, and dirt accumulation in the basket grid is observed through the square hole and the basket grid is disassembled and assembled; when the impurities in the basket grid are more, opening a grid cover plate, and directly cleaning the impurities of the basket grid; of course, the basket grid can be taken out for cleaning.

According to the scheme, the upper end of the baffle is flush with the upper end of the basket grid, the lower end of the baffle is flush with the bottom of the water inlet pipe, and therefore the situation that water directly penetrates through the opposite side faces of the grid to enter the water outlet pipe to form a short circuit is avoided.

According to the scheme, the sand hopper is a circular groove, and the vertical section of the bottom of the sand hopper is of an inverted trapezoidal structure, so that settled sand can be better collected.

According to the scheme, the vacuum sand discharge system is provided with the starting button, the vacuum sand discharge system can be manually started at regular intervals to discharge sand, and the automatic sand discharge at regular intervals can also be set.

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

According to the scheme, the connecting pieces are multiple and are arranged around the closed guide pipe at equal intervals. The top of the closed guide pipe is flush with the top of the tank body, and a water passing channel is arranged between the outside of the closed guide pipe and the inside of the tank body. The spoilers are arranged on the inner wall of the tank body at equal intervals.

The beneficial effects of the utility model reside in that:

by arranging the spoiler and closing the guide pipe, the water flow can generate eddy flow better, and sand grains, water and the like with different specific gravities are separated;

the bottom of the tank body is designed into a funnel shape, so that sand grains can enter a sand hopper along the funnel;

by arranging the basket grid, large-particle impurities, domestic garbage and the like (floating objects) in initial rainwater can be conveniently intercepted, the treatment load of the grit chamber is reduced, and the grit chamber is convenient to clean;

the arrangement of the basket grid is also convenient for reducing the sand content of the outlet water of the grit chamber;

the side surface of the basket grid opposite to the side where the water inlet pipe extends is provided with a baffle plate, namely the side surface of the basket grid far away from the water inlet pipe is provided with a closed structure which can block water flow and prevent the water flow from directly passing through the basket grid to flow to a water outlet area, so that a short circuit is formed and the sand settling effect of the sand basin is reduced;

by arranging the spoilers, the water flow can be disturbed, the water flow energy is reduced, sand sedimentation is promoted, and the sand removal effect is improved;

the outer edge of the horn-shaped structure at the bottom of the closed guide pipe is larger than the inner diameter of the sand hopper, so that sand falling into the sand hopper can be prevented from returning to the pool under the disturbance of water flow and flowing out along with the water flow, and a stable sand removing effect is kept;

compared with air stripping sand discharge, the vacuum sand discharge system is not easily influenced by the sand discharge height, a compressed air system is not required to be independently arranged for a rainwater treatment station without a compressed air source, the vacuum sand discharge system is convenient and energy-saving, and has two functions of manual start and automatic start, and the operation and management are convenient;

the utility model discloses a grit chamber both had been fit for impurity and the more initial stage rainwater of sand grain and had been handled, also can be used to sneak into the preliminary treatment of the municipal sewage of rainwater.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic structural view of a hydrocyclone grit chamber for initial rainwater treatment;

FIG. 2 is a cross-sectional view taken along line 1-1 of FIG. 1;

FIG. 3 is a schematic view of the top view of the hydrocyclone grit chamber for initial rainwater treatment;

FIG. 4 is a schematic view of the connection structure of the basket grid and the water inlet pipe;

in the figure: 1-a pool body, 2-a water inlet pipe, 3-a water outlet pipe, 4-a closed guide pipe, 5-a sand discharge pipe, 6-a connecting piece, 7-a basket lifting grid, 8-a spoiler, 9-a sand hopper, 10-a funnel-shaped bottom, 11-a vacuum sand discharge system, 12-a starting button, 13-an emptying pipe, 14 and a baffle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1-4, a hydrocyclone sand basin for initial rainwater treatment comprises a basin body 1, a basket grid 7, a spoiler 8, a sand hopper 9, a closed draft tube 4, a sand discharge pipe 5 and a vacuum sand discharge system 11.

The top of the tank body 1 is provided with a first round hole and a square hole (the round hole is arranged in the center of the top), the side wall of the tank body 1 is provided with a water inlet pipe 2 and a water outlet pipe 3, and the water outlet pipe 3 is higher than the water inlet pipe 2; the bottom of the tank body 1 is a funnel-shaped bottom 10, and the side edge of the funnel-shaped bottom 10 forms an included angle of 55 degrees with the horizontal plane. The basket grille 7 is arranged below the square hole; the water outlet of the water inlet pipe 2 is flush with the basket grid 7 and is arranged at the side wall opening of the basket grid 7; the side wall of the basket grid 7 opposite to the opening is provided with a baffle plate 14, the upper end of the baffle plate 14 is flush with the upper end of the basket grid 7, and the lower end of the baffle plate 14 is flush with the bottom of the water inlet pipe 2. The basket grid 7 is connected with the top of the tank body 1 through a handle. For the convenience of operation, a grid cover plate can be arranged on the top of the basket grid 7. When the device is used, the dirt accumulation condition in the basket grid 7 is observed through the square holes, and the basket grid 7 is disassembled and installed; when the impurities in the basket grating 7 are more, the grating cover plate can be opened to directly clean. In this embodiment, the 7 bars of hand-basket grid adopt square grid structure, and the grid shape is the cuboid. The spoiler 8 is rectangular shaped plate, and has a plurality ofly, and vertical interval sets up on 1 inner wall of cell body, and spoiler 8 is less than 90 contained angles (preferably less than 60 contained angles) with 1 inner wall tangent line of cell body to ensure that the incline direction is opposite with the rivers direction. In the embodiment, the upper end of the spoiler 8 right below the water inlet pipe is flush with the pipe bottom of the water inlet pipe 2, and the lower end of the spoiler is flush with the upper surface of the funnel-shaped bottom 10; the upper ends of the other spoilers 8 are flush with the elevation of the top of the water outlet pipe 3, and the lower ends are flush with the upper surface of the funnel-shaped bottom 10. The sand hopper 9 is a circular groove, is arranged below the center of the bottom of the tank body 1 and is connected with the funnel-shaped bottom 10, and the vertical section of the bottom of the sand hopper 9 is of an inverted trapezoidal structure. And an emptying pipe 13 with a valve is arranged at the bottom of the sand hopper 9, and the valve can be manually opened for emptying. The closed guide pipe 4 penetrates through a first round hole at the top of the tank body 1, is fixed in the tank body 1 through a connecting piece 6 and is arranged on the central axis of the tank body 1. The lower end of the closed guide pipe 4 is a downward bell mouth, and the diameter of the bottom of the bell mouth is larger than that of the sand hopper 9. In this embodiment, the vertical distance between the bottom edge of the bell mouth of the closed draft tube 4 and the sidewall of the funnel-shaped bottom 10 of the tank body 1 is 200mm. The bottom and the top center of the closed guide pipe 4 are respectively provided with a round hole, and the sand discharge pipe 5 sequentially passes through 2 round holes of the closed guide pipe 4 and then extends into the sand hopper 9. The lower part of the sand discharge pipe 5 is a downward bell mouth, and the bottom of the bell mouth has a certain distance with the bottom of the sand hopper 9. The vacuum sand discharging system 11 is communicated with the sand discharging pipe 5, the vacuum sand discharging system 11 is provided with a starting button 12, and the vacuum sand discharging system can be started manually at regular intervals to discharge sand or can be set to automatically discharge sand at regular intervals.

The working principle is briefly described as follows:

the initial rainwater enters the tank body 1 through the water inlet pipe 2, after passing through the basket grid 7, large-particle sand grains, domestic garbage and the like are intercepted by the basket grid 7, and as the face, right opposite to the water inlet pipe 2, of the basket grid 7 is of a closed structure (as shown in fig. 4, a baffle 14 is arranged in the height from elevation a to elevation b, the baffle is a closed face, and the height from elevation b to elevation c is a grid face), the sewage cannot directly pass through the basket grid 7 to the side face to enter the tank or enter the water outlet pipe 3, but is obstructed, firstly enters the tank from the lower part of the basket grid 7, and flows around the outer ring under the action of the closed guide pipe 4, so that centrifugal force is formed, and vortex is generated; in the process of water flow advancing, the water flow continuously impacts the spoiler 8 on the inner wall of the pool body 1 to reduce kinetic energy, fine sand carried by the water flow is more easily thrown to Chi Zhou by centrifugal force after the kinetic energy is reduced, then settlement occurs, and the fine sand slides into the sand hopper 9 from a gap between the funnel-shaped bottom 10 and the horn structure at the lower part of the closed guide pipe 4 along the funnel-shaped bottom 10; after the sand is accumulated to a certain degree in the sand hopper 9, the bottom of the sand discharge pipe 5 is submerged, and simultaneously, because sewage exists in the sand hopper 9, a start button 12 of a vacuum sand discharge system 11 at the top of the grit chamber is pressed down at the moment, the sand is vacuumized in the sand discharge pipe 5, and the sand in the sand hopper 9 is lifted under the action of vacuum suction force and is discharged to the outside of the chamber along the sand discharge pipe 5. The bottom of the sand discharge pipe 5 is provided with a downward horn mouth, so that the sand suction area can be increased, and meanwhile, the possibility of pipe orifice blockage of the sand discharge pipe 5 can be reduced because large-particle sand is intercepted by the basket grid 7. When the operator observes that the discharged sand-water mixture is clear at the sand outlet of the sand discharge pipe 5, the operator can close the start button 12 of the vacuum sand discharge system 11 to stop discharging sand. According to the manual sand discharging experience accumulated for a long time, the vacuum sand discharging system 11 can be set to be started at fixed time for discharging sand, so that the labor is saved. For conditional sewage treatment stations and sewage plants, a high-pressure water washing device can be additionally arranged according to actual conditions, and the sand discharge pipe 5 is regularly washed. After flowing for one circle or several circles around the pool wall, the water flow enters the water outlet pipe 3 and is discharged out of the pool.

At the grit chamber top, the long-pending dirty condition in the basket grid 7 is observed to the apron of accessible basket grid 7 or the square hole at 1 top of cell body, if the filth is more in the grid, can clear up basket grid 7 lift or directly open the interior filth of grid apron clearance basket grid. If want to clear up after grit chamber long-term operation, can stop intaking, open bottom blow-down pipe 13 and go up the valve, deposit water evacuation in with the pond, then take out basket grid 7, in the staff gets into the pond from the square hole, parts such as clearance spoiler 8, close the valve on the blow-down pipe 13 after the clearance is accomplished, installation basket grid 7, intake again, the grit chamber gets into the operation stage once more.

The utility model enhances the sewage interception effect, avoids large particle impurities and garbage from entering the tank to cause blockage, enhances the turbulence effect on water flow, further improves the desanding rate, does not need a stirring paddle, and reduces the power consumption; the vacuum sand discharge system 11 is adopted for discharging sand, the operation is convenient, two modes of manual starting and automatic operation are provided, a compressed air pipeline and equipment adopted by the traditional sand basin air stripping sand discharge are omitted, the operation and maintenance cost is saved, and the economic benefit is higher.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims (10)

1. The utility model provides a water conservancy whirl grit chamber for initial stage rainwater is handled which characterized in that: comprises a tank body, a basket grid, a spoiler, a sand hopper, a closed guide pipe, a sand discharge pipe and a vacuum sand discharge system;

a water inlet pipe and a water outlet pipe are arranged on the side wall of the tank body, and the water outlet pipe is higher than the water inlet pipe; the bottom of the tank body is a funnel-shaped bottom;

the water outlet of the water inlet pipe is flush with the basket grid and is arranged at the opening of the side wall of the basket grid; the side wall of the basket grid opposite to the side wall of the opening is provided with a baffle;

a plurality of spoilers are vertically arranged on the inner wall of the tank body, and the inclination direction of the spoilers is opposite to the water flow direction;

the sand hopper is arranged below the center of the bottom of the tank body, and the upper part of the sand hopper is connected with the funnel-shaped bottom; the bottom of the sand hopper is provided with a vent pipe with a valve;

the closed guide pipe is arranged on the central axis of the tank body, and the upper end of the closed guide pipe is fixed on the tank body through a connecting piece;

the sand discharge pipe penetrates through the closed guide pipe and extends into the sand hopper;

the vacuum sand discharge system is communicated with the sand discharge pipe and can discharge sand in the sand hopper.

2. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, wherein: the spoiler is a rectangular plate, and an included angle smaller than 90 degrees is formed between the spoiler and the tangent line of the inner wall of the tank body.

3. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, wherein: the upper end of the spoiler right below the water inlet pipe is flush with the pipe bottom of the water inlet pipe, and the lower end of the spoiler is flush with the upper surface of the funnel-shaped bottom; the upper ends of the other spoilers are flush with the elevation of the top of the water outlet pipe, and the lower ends of the other spoilers are flush with the upper surface of the funnel-shaped bottom.

4. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, wherein: the side edge of the funnel-shaped bottom and the horizontal plane form an included angle of 55 degrees.

5. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, wherein: the lower end of the closed guide pipe is provided with a downward horn mouth, and the diameter of the horn mouth is larger than that of the sand hopper.

6. The hydrocyclone grit chamber for initial rainwater treatment according to claim 5, wherein: the vertical distance between the edge of the bottom of the bell mouth of the closed guide pipe and the side wall of the bottom of the funnel mouth of the tank body is 200mm.

7. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, wherein: the lower part of the sand discharge pipe is a downward bell mouth, and the bottom of the bell mouth has a certain distance with the bottom of the sand hopper.

8. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, wherein: the basket grid is connected with the top of the tank body through a handle; the top of the basket grid is provided with a grid cover plate; the top of the tank body is provided with a square hole, and the dirt accumulation condition in the basket grid and the basket grid can be observed and assembled and disassembled through the square hole.

9. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, wherein: the upper end of the baffle is flush with the upper end of the basket grid, and the lower end of the baffle is flush with the bottom of the water inlet pipe.

10. The hydrocyclone grit chamber for initial rainwater treatment according to claim 1, wherein: the cross-section of the bottom of the sand hopper is in an inverted trapezoid shape.

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