CN217340204U

CN217340204U - Sand discharge system of grit chamber

Info

Publication number: CN217340204U
Application number: CN202221399845.9U
Authority: CN
Inventors: 刘三鹏; 张斌锋; 张炜; 蔡安蓉; 吴畏; 李小军; 邱有均
Original assignee: Chongqing Yuxi Water Co ltd Yongchuan Branch
Current assignee: Chongqing Yuxi Water Co ltd Yongchuan Branch
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-09-02
Anticipated expiration: 2032-06-07

Abstract

The utility model discloses a sand setting tank sand discharge system, including installing the air stripping device in the sand setting tank and installing the grit-water separator outside the sand setting tank, the sand lifting pipe connection of air stripping device is to the entry end of grit-water separator, and its characterized in that still is provided with gas-liquid separation on the sand lifting pipe that is located grit-water separator top. The utility model has the advantages of sand-water separation effect when can improve the sand discharge follow-up processing better.

Description

Sand discharge system of grit chamber

Technical Field

The utility model relates to a grit chamber for sewage treatment, concretely relates to grit chamber sand discharge system.

Background

The sand setting system is equipment used for separating and extracting sand from sewage in a sewage treatment plant, and is also called a sand setting tank. The traditional cyclone sand basin with a circular reinforced concrete structure comprises a basin body, wherein the lower half part of the basin body is a sand hopper part with a conical inner cavity, the upper half part of the basin body is a sand settling area with a diameter larger than that of the cylindrical inner cavity of the sand hopper part, and an inflow port and an outflow port are arranged above the basin body; the sand extraction device is characterized by further comprising a sand extraction pipeline vertically arranged in the middle of the tank body, the lower end of the sand extraction pipeline extends to the position close to the bottom of the sand hopper part, the upper end of the sand extraction pipeline is connected with the sand-water separator, a pressure air pipeline is sleeved outside the sand extraction pipeline to form a double-layer structure, the lower end of the pressure air pipeline is hermetically connected with the lower end of the sand extraction pipeline, a circle of air holes are distributed in the inner wall of the sand extraction pipeline above the sealed connection part to enable the sand extraction pipeline to be communicated with the pressure air pipeline to form an air distribution structure, the upper end of the pressure air pipeline is connected with a sand extraction air source, and the sand extraction air source adopts a roots blower; and a vertical stirring device is also arranged in the tank body.

This kind of current whirl grit chamber has agitating unit cost higher, relies on the stirring to provide power and realizes that the whirl sand setting effect is relatively poor, carries the relatively poor defect of grade of sand efficiency.

In order to improve the sand setting efficiency and the sand extraction effect of the sand setting tank, the applicant has successively applied for a sloping plate type rotational flow sand setting system disclosed in patent CN102430271B and a rotational flow sand setting tank of 2020230205976.

Improve the grit chamber in the above-mentioned patent, promoted the sand setting and carried the effect of sand. However, the sediment settled in the prior grit chamber is extracted by a gas stripping device and discharged to a sand-water separator for sand-water separation treatment. The sand discharge system with the structure has the defects of poor separation effect of the sand-water separator and low sand discharging efficiency.

SUMMERY OF THE UTILITY MODEL

To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to provide a grit discharge system of grit chamber that can improve the subsequent sand-water separation effect of sand discharge better.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a sand sediment outflow system of grit chamber, is including installing the air stripping device in the grit chamber and installing the grit separator outside the grit chamber, and the sand lifting pipe connection of air stripping device is to the entry end of grit separator, its characterized in that still is provided with gas-liquid separation on the sand lifting pipe that is located grit separator top.

The applicant researches and discovers that the sand-water separator has a poor separation effect because a large amount of gas is mixed in the silt flow provided by the gas stripping device, so that the gas, silt and the flow are mixed together and enter the sand-water separator, the gas mixed in the sand water contains larger air pressure, the normal work of the sand-water separator is seriously disturbed, and the spiral blade in the sand-water separator hardly lifts settled sand upwards from the water surface, so that the sand-water separation effect is greatly influenced. Therefore, the applicant arranges a gas-liquid separation device on the sand lifting pipe above the sand-water separator, so that the gas doped in the silt fluid lifted by the sand lifting pipe is separated and discharged to release pressure in one step in advance, and the gas is prevented from entering the gas-liquid separation device to generate interference. Therefore, the subsequent sand-water separation effect of sand discharge is better improved.

Further, the air stripping device is a double-effect sand extracting device, and the double-effect sand extracting device can realize switching control of pulse air stripping and continuous air stripping.

Like this, rely on the economic benefits and social benefits to carry sand device can realize the switching control of pulsed air stripping and continuous type air stripping, when the sand setting volume is great in the grit chamber, can control to open pulsed air stripping mode, improve and carry sand efficiency, when the sand setting volume is less in the grit chamber, can control to open continuous type air stripping mode, reduce energy loss. Therefore, the sand extraction mode can be enriched, and the sand extraction device can better adapt to various sand setting quantities. In practice, the specific structure of the double-effect sand extracting device can be the same as that in the patent application filed by the applicant, and is not described in detail herein.

Further, gas-liquid separation includes that a confined connects the hopper, connects hopper upper portion to have an ascending entry end, connects one side to be provided with a spiral in the hopper to carry sand machine in the slant, and the spiral is carried sand machine and is included the sand carrying section of thick bamboo that a slant set up, is provided with in carrying the sand section of thick bamboo and carries the sand pivot, carries and is provided with in the sand pivot and carries sand helical blade, carries sand section of thick bamboo upper end and installs and carry the sand motor and carry the sand pivot and link to each other, carries sand section of thick bamboo upper end downside and is provided with out the sand mouth, still is provided with out the liquid pipeline on the lateral wall of material head upper portion.

Thus, the device has the advantages of simple structure, easy implementation, low cost, good sand-water separation effect and good totally-enclosed treatment sanitation.

Furthermore, the gas-liquid separation device comprises a drop container, the upper part of the drop container is provided with an inlet end connected with the sand extracting pipe and an outlet end positioned below the drop container, the outlet end is provided with a water outlet pipeline used for being connected with the inlet end of the sand-water separator, and the drop container is also provided with an upward exhaust end.

Therefore, the gas pressure in the muddy sand water flow can be simply and effectively released by adopting a water drop container and using a water drop mode, and the gas is positioned on the upper part of the inner cavity of the container after overflowing and is discharged outside by depending on the exhaust end. The water flow of the mud and sand after the gas pressure is removed is discharged into the sand-water separator through the outlet end and the water outlet pipeline. Therefore, the gas pressure in the silt flow provided by the gas stripping device is conveniently and quickly released, and the influence on the work of a subsequent sand-water separator is avoided. And has the advantages of simple structure, convenient implementation, low cost, good exhaust effect and the like.

Furthermore, the upper end of the drop container is designed in a closed mode, and the exhaust end of the drop container is connected with an aeration device of the sewage treatment pool through an exhaust pipeline.

Thus, the closed treatment is realized, the odor can be prevented from volatilizing, and the sanitation is improved.

Furthermore, the whole drop container is cylindrical, and the inlet end of the drop container is positioned on the side wall of the upper part and arranged along the tangential direction of the horizontal section circle.

Therefore, the water inlet device is better beneficial to continuously forming rotational flow after water falls in the water falling container, the rotational flow enables the hydraulic power of each position in the inner cavity of the container to be uniform, and sediment precipitation caused by nonuniform hydraulic power is avoided. Meanwhile, the rotational flow can enable the gas components with lighter mass to better converge to the middle position and then overflow upwards, and the exhaust effect is improved.

Furthermore, the bottom surface of the inner cavity of the water drop container is a downward conical surface, and the outlet end is positioned at the bottommost position of the center of the conical surface.

Therefore, the mud-sand water flow is more convenient to discharge.

Furthermore, a spiral flow guide bulge is arranged on the conical surface.

Therefore, the spiral flow guide protrusion can guide the water flow at the position of the outlet end to flow out in a spiral direction, so that lighter gas components can be better converged to the middle position and upwards discharged to the water surface when the water flows out, and the exhaust effect is improved.

Furthermore, a horizontal air duct is arranged at the middle lower part of the lower end of the drop container, the air duct is arranged right opposite to the outlet end of the drop container, a plurality of air guide holes are formed in the air duct, and the air duct is upwards connected out of the drop container through a vertical pipe.

This is because the swirling flow formed at the outlet end of the drop tank causes the gas to converge toward the center, but the swirling flow of the swirling flow has a downward attractive force, so that part of the gas is drawn into the outlet without overflowing as much as possible due to the swirling force. Therefore, the air guide pipe is arranged at the adjacent position above the outlet end of the drop water container, so that gas components at the center of the outlet position can be attached to the air guide pipe, enter the air guide pipe from the air guide hole and then are discharged upwards. This further improves the gas separation effect.

Furthermore, both ends of the air duct are connected with upward vertical pipes, and the upper ends of the vertical pipes are connected with a water drop container and an exhaust pipeline.

Thus, the air duct is more beneficial to exhaust.

Furthermore, a circle of traction hair which extends outwards is arranged at the periphery of the air guide hole below the air guide pipe.

Therefore, the air can be better guided to be attached and enter the air guide holes by the traction hair, and the air separation effect is better improved.

To sum up, the utility model has the advantages of sand-water separation effect when can improve the sand discharge follow-up processing better.

Drawings

Fig. 1 is the structural schematic diagram of the sand discharge system of the grit chamber of the utility model.

Fig. 2 is a schematic structural view of the single gas-liquid separation device in fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

In the specific implementation: referring to fig. 1-2, a sand removal system for a grit chamber comprises an air stripping device 1 installed in a grit chamber 4 and a sand-water separator 2 installed outside the grit chamber, wherein a sand lifting pipe 3 of the air stripping device 1 is connected to an inlet end 6 of the sand-water separator 2, and a gas-liquid separation device is further arranged on the sand lifting pipe above the sand-water separator 2.

The sand-water separator is characterized in that a gas stripping device is arranged in the sand-water separator, and the gas stripping device is used for stripping sand water flow from the sand-water separator. Therefore, the applicant arranges a gas-liquid separation device on the sand extraction pipe above the sand-water separator, so that the gas doped in the silt fluid extracted by the sand extraction pipe is separated and discharged to release pressure in advance, and the gas is prevented from entering the gas-liquid separation device to generate interference. Therefore, the subsequent sand-water separation effect of sand discharge is better improved.

The air stripping device 1 is a double-effect sand extracting device, and the double-effect sand extracting device can realize switching control of pulse air stripping and continuous air stripping.

Wherein, gas-liquid separation includes that a confined connects hopper 5, connects 5 upper portions of hopper to have an ascending entry end 6, connects one side slant to be provided with a spiral in the hopper and carries the sand machine, and the spiral is carried the sand machine and is included a sand section of thick bamboo 7 that carries that the slant set up, is provided with in carrying the sand section of thick bamboo and carries the sand pivot, carries to be provided with in the sand pivot and carries the sand helical blade, carries sand section of thick bamboo upper end to install and carries sand motor 8 and carry the sand pivot and link to each other, carries sand section of thick bamboo upper end downside and is provided with sand outlet 9, still is provided with out liquid pipeline 10 on the material head upper portion lateral wall.

The gas-liquid separation device comprises a drop container 11, wherein the upper part of the drop container 11 is provided with an inlet end 12 connected with the sand extracting pipe 3 and an outlet end positioned below, the outlet end is provided with a water outlet pipeline 13 used for being connected with the inlet end of the sand-water separator, and the drop container is also provided with an upward exhaust end.

Therefore, the gas pressure in the muddy sand water flow can be simply and effectively released by adopting a water dropping container and using a water dropping mode, and the gas is positioned at the upper part of the inner cavity of the container after overflowing and is discharged by depending on the exhaust end. The water flow of the silt after the air pressure is removed is discharged into the sand-water separator through the outlet end and the water outlet pipeline. Therefore, the gas pressure in the muddy sand water flow provided by the gas stripping device is conveniently and quickly released, and the influence on the work of the subsequent sand-water separator is avoided. And has the advantages of simple structure, convenient implementation, low cost, good exhaust effect and the like.

Wherein, the upper end of the drop container 11 is designed in a closed way, and the exhaust end is connected with the aeration device of the sewage treatment pool through an exhaust pipeline 14.

The drop container 11 is cylindrical as a whole, and the inlet end 12 of the drop container 11 is positioned on the upper side wall and arranged along the tangential direction of the horizontal cross-section circle.

Like this, be favorable to intaking better and continue to form the whirl behind the drop in drop container, the whirl makes the every position water conservancy of container inner chamber even, avoids the water conservancy inequality to lead to silt to deposit. Meanwhile, the gas components with lighter weight can be better converged to the middle position by the rotational flow and then overflow upwards, and the exhaust effect is improved.

Wherein, the bottom surface of the inner cavity of the drop container 11 is a downward conical surface, and the outlet end is positioned at the bottommost position of the center of the conical surface.

Therefore, the mud-sand water flow is more convenient to discharge.

Wherein, a spiral diversion bulge 15 is arranged on the conical surface.

Wherein, the lower middle part of the lower end of the drop container 11 is also provided with a horizontal air duct 16, the air duct 16 is arranged right opposite to the outlet end of the drop container, the air duct is provided with a plurality of air vents 17, and the air duct is upwards connected out of the drop container through a vertical pipe 18.

This is because the swirling flow formed at the outlet end of the drop tank causes the gas to converge toward the middle, but since the swirling flow of the swirling flow has a downward attractive force, part of the gas is drawn into the outlet without being overflowed upward by the swirling force. Therefore, the air guide pipe is arranged at the adjacent position above the outlet end of the water drop container, so that the gas components at the center of the outlet position can be favorably attached to the air guide pipe and enter the air guide pipe from the air guide hole and then are discharged upwards and outwards. This further improves the gas separation effect.

Wherein, both ends of the air duct 16 are connected with an upward vertical tube 18, and the upper end of the vertical tube is connected with the drop water container 11 and the exhaust pipeline 14.

Thus, the air duct is more beneficial to exhaust.

Wherein, a circle of traction hair 19 extending outwards is arranged at the periphery of the air guide hole below the air guide tube 16.

Claims

1. The utility model provides a sand sediment outflow system of grit chamber, is including installing the air stripping device in the grit chamber and installing the grit separator outside the grit chamber, and the sand lifting pipe connection of air stripping device is to the entry end of grit separator, its characterized in that still is provided with gas-liquid separation on the sand lifting pipe that is located grit separator top.

2. The grit chamber sand discharge system as claimed in claim 1 wherein said air stripping means is a double effect sand stripping means, said double effect sand stripping means being capable of switching control of pulse type air stripping and continuous type air stripping.

3. The sand discharge system of the grit chamber as claimed in claim 1, wherein said gas-liquid separation means comprises a closed receiving hopper, the upper part of said receiving hopper has an upward inlet end, a spiral sand lifting machine is obliquely arranged upward on one side in said receiving hopper, said spiral sand lifting machine comprises an obliquely arranged sand lifting cylinder, a sand lifting rotating shaft is arranged in said sand lifting cylinder, a sand lifting spiral blade is arranged on said sand lifting rotating shaft, a sand lifting motor is mounted on the upper end of said sand lifting cylinder and connected with said sand lifting rotating shaft, a sand outlet is arranged on the lower side of the upper end of said sand lifting cylinder, and a liquid outlet pipe is arranged on the side wall of the upper part of said receiving head.

4. The grit chamber sand discharge system as claimed in claim 1 wherein the gas-liquid separator comprises a drop tank having an upper inlet end connected to the sand extraction tube and a lower outlet end with a water outlet conduit for connection to the inlet end of the sand-water separator, the drop tank further having an upward exhaust end.

5. The grit chamber sand discharge system as claimed in claim 4 wherein said drop tank is of closed design at the upper end thereof and the exhaust end is connected to the aeration means of the wastewater treatment tank through an exhaust conduit.

6. The grit chamber sand discharge system as claimed in claim 4 wherein the drop tank is generally cylindrical and the inlet end of the drop tank is located in the upper side wall and is arranged tangentially to the horizontal cross-sectional circle.

7. The grit chamber sand discharge system of claim 6 wherein the bottom surface of the internal chamber of the drop container is a downwardly tapered surface and the outlet end is located at the lowermost position of the center of the tapered surface.

8. The grit chamber sand discharge system of claim 6 wherein said conical surface is provided with a spiral deflector projection.

9. The grit chamber sand discharge system of claim 6 wherein a horizontal air duct is further provided at the lower middle portion of the lower end of the drop container, the air duct is disposed opposite to the outlet end of the drop container, the air duct is provided with a plurality of air vents, and the air duct is upwardly connected out of the drop container through the standpipe.

10. The grit chamber sand discharge system of claim 9 wherein both ends of the air duct are connected to an upward riser, the upper end of the riser being connected to a drop water container and an exhaust duct;

a circle of traction hair which extends outwards is arranged at the periphery of the air guide hole below the air guide pipe.