Hydraulic cyclone grit chamber for sewage treatment

Abstract

The utility model discloses a hydraulic cyclone grit chamber for sewage treatment, which comprises a chamber body, the chamber body is provided with a water inlet and a water outlet, the water inlet is connected with a water inlet channel, the water outlet is connected with a water outlet channel, a sand collecting area is arranged in the chamber body, a grit setting area is connected above the sand collecting area, and the grit setting area is connected with the water inlet channel. A sand lifting pipe, an air flushing pipeline and an air lifting pipeline are arranged in the sand collecting area, and the sand lifting pipe upwards extends out of a top cover of the tank body and is connected with a sand discharging pipe; the air flushing pipeline and the air stripping pipeline are connected to a compressed air pipe in parallel; the water inlet channel is set to be at a preset gradient, so that the flow speed of sewage to be treated in the water inlet channel is increased, and the sewage enters the sand setting area along the tangential direction. Stirring equipment can be omitted, equipment maintenance is not needed, and the situation that operation of a sewage plant is affected due to the problem of the stirring equipment can be avoided; and energy is saved, consumption is reduced, carbon emission is reduced, and carbon neutralization of a sewage treatment plant is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a hydraulic cyclone sand settling tank used for sewage treatment. Background Art

[0002] The cyclone grit chamber is mainly used for pretreatment of sewage treatment to remove larger inorganic particles in sewage. The traditional cyclone grit chamber mainly uses the rotation of the mechanical impeller to control the flow rate and flow state of the inlet water, so that the sand is accelerated to settle in a spiral line along the wall of the tank under the action of centrifugal force and gravity. At the same time, the organic matter flows away with the water flow under the action of the water flow. The sand that sinks to the bottom of the tank is lifted by air or pumps, and then enters the sand-water separator with a small amount of sewage for separation and discharge, thereby achieving the purpose of sand removal.

[0003] However, the existing cyclone grit chamber uses mechanical stirring which consumes electric energy, and the mechanical equipment needs maintenance, which consumes manpower. Therefore, it is necessary to improve the cyclone grit chamber. Utility Model Content

[0004] The utility model aims to save energy and reduce consumption in sewage treatment plants and reduce carbon emissions, and provides a hydraulic cyclone sand settling tank for sewage treatment.

[0005] A hydraulic cyclone sand settling tank for sewage treatment comprises a tank body, wherein the tank body has a water inlet and a water outlet, wherein the water inlet is connected to an inlet channel, and the water outlet is connected to an outlet channel, wherein a sand collecting area is arranged in the tank body, and a sand settling area is connected above the sand collecting area, wherein a sand lifting pipe, an air flushing pipe, and an air lift pipe are arranged in the sand collecting area, wherein the sand lifting pipe extends upwardly out of the top cover of the tank body and is connected to a sand discharge pipe; the air flushing pipe and the air lift pipe are connected in parallel to a compressed air pipe; the inlet channel is set to a predetermined slope so that the flow velocity of the sewage to be treated in the inlet channel is increased and enters the sand settling area along a tangential direction.

[0006] Among them, the upper part of the cavity of the sand settling area is a cylindrical part, and the lower part is a frustum part. The cylindrical part is directly connected to the frustum part, and the sand collecting area is connected to the lower end of the frustum part. The upper end diameter of the frustum part is consistent with the diameter of the cylindrical part, and the lower end diameter of the frustum part is smaller than its upper end diameter.

[0007] Wherein, the upper end of the sand collecting area is consistent with the upper end diameter of the frustum portion.

[0008] Wherein, the upper part of the inner cavity of the sand collecting area is a cylindrical cavity structure, and the lower part is a conical platform cavity structure.

[0009] Wherein, a pipeline installation block is arranged in the middle of the top cover, and a pipeline installation hole is provided on the installation block.

[0010] Wherein, the mounting block is detachably connected to the top cover.

[0011] Wherein, the water inlet is communicated with the sand settling area, and the water inlet channel is arranged on one side of the pool body.

[0012] Wherein, the water outlet is communicated with the sand settling area, and the water outlet channel is arranged on one side of the pool body.

[0013] The interior of the pool is poured with concrete to form the sand collecting area and the sand settling area.

[0014] Compared with traditional cyclone grit chambers, the hydraulic cyclone grit chamber of the utility model for sewage treatment can save stirring equipment, does not require equipment maintenance, and can avoid affecting the operation of the sewage treatment plant due to problems with the stirring equipment. It also saves energy and reduces consumption, reduces carbon emissions, and is conducive to achieving "carbon neutrality" in sewage treatment plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic plan view of a hydraulic cyclone grit chamber for sewage treatment.

[0016] Figure 2 The utility model is a cross-sectional schematic diagram of a hydraulic cyclone grit chamber for sewage treatment.

[0017] Description of reference numerals:

[0018] 1-tank body, 2-water inlet, 3-water inlet, 4-sand settling area, 5-sand collecting area, 6-water outlet, 7-water outlet, 8-sand lifting pipe, 9-sand discharge pipe, 10-compressed air pipe, 11-air flushing pipe, 12-air lift pipe. DETAILED DESCRIPTION

[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] like Figure 1 and Figure 2As shown, a hydraulic cyclone sand settling tank for sewage treatment according to an embodiment of the utility model comprises a tank body 1, wherein the tank body has a water inlet 3 and a water outlet 6, wherein the water inlet 3 is connected to an inlet channel 2, and the water outlet 6 is connected to an outlet channel 7, wherein a sand collecting area 5 is arranged in the tank body 1, wherein the sand collecting area is connected to a sand settling area 4 above, wherein a sand lifting pipe 8, an air flushing pipe 11, and an air lift pipe 12 are arranged in the sand collecting area, wherein the sand lifting pipe extends upwardly out of a top cover 13 of the tank body and is connected to a sand discharge pipe 9; the air flushing pipe 11 and the air lift pipe 12 are connected in parallel to a compressed air pipe 10; the inlet channel 2 is set to a predetermined slope, so that after the sewage to be treated enters the inlet channel, the flow velocity in the inlet channel 2 increases, and the sewage enters the sand settling area 4 along a tangential direction.

[0021] In some embodiments, the upper part of the cavity of the sand settling area 4 is a cylindrical part, and the lower part is a frustum part, the cylindrical part is directly connected to the frustum part, the sand collecting area is connected to the lower end of the frustum part, the upper end diameter of the frustum part is consistent with the diameter of the cylindrical part, and the lower end diameter of the frustum part is smaller than the upper end diameter. The upper end of the sand collecting area 5 is consistent with the upper end diameter of the frustum part.

[0022] In some embodiments, the upper portion of the inner cavity of the sand collecting area 5 is a cylindrical cavity structure, and the lower portion is a conical cavity structure.

[0023] In some embodiments, the top cover 13 is preferably a metal cover plate, a step cloth placed on the top of the pool body, a pipeline mounting block 14 is arranged in the middle of the top, and the mounting block has mounting holes for corresponding pipelines. The sand lifting pipe 8, the air flushing pipe 11, and the air lift pipe 12 pass through the mounting holes on the mounting block and are then connected to the compressed air pipe 10 and the sand discharge pipe. Optionally, the mounting block and the top cover can be detachably connected or fixedly connected, such as by threaded connection, or by other means.

[0024] In some embodiments, the sand discharge pipe 9 is equipped with a control valve, and the air flushing pipeline 11 and the air stripping pipeline 12 are each provided with a corresponding valve, outside the pool body, above the top, to control the switching input of compressed air or the volume of the input compressed air, etc. The air flushing pipeline 11 and the air stripping pipeline 12 are each provided with a corresponding pressure gauge, outside the pool body, above the top, to detect the pressure of the compressed air.

[0025] In some embodiments, the water inlet is communicated with the sand settling area, the water inlet channel is arranged on one side of the pool body, the water outlet is communicated with the sand settling area, and the water outlet channel is arranged on one side of the pool body.

[0026] In some embodiments, the interior of the pool body is cast with concrete to form the sand collecting area and the sand settling area. The pool body can be made of concrete, and its shape is preferably a circular or cylindrical structure.

[0027] Working process:

[0028] The flow rate of sewage increases in the water inlet channel, and it enters the sand settling area through the water inlet in the tangential direction. When sewage enters the sand settling area, under the action of centrifugal force, the sand with higher density in the sewage is thrown to the pool wall and sinks into the sand collection area under the action of gravity; the organic matter is trapped in the sewage. Compressed air is introduced into the air flushing pipe through the compressed air pipe to loosen the sand at the bottom of the sand collection area and wash away the organic matter attached to the surface of the sand. Compressed air is introduced through the compressed air pipe, and the air lift pipe removes the sand at the bottom of the sand collection area through the sand lifting pipe and the sand discharge pipe.

[0029] Implementation Cases:

[0030] The scale of a hydrocyclone sedimentation tank is 12×10 4 m 3 / d, divided into two groups, the tank body diameter is 5480mm. The hydrocyclone grit chamber is equipped with an agitator. During the commissioning period, the agitator is running and the hydrocyclone grit chamber does not discharge sand; when the agitator is turned off, the hydrocyclone grit chamber discharges sand normally. The project is running with water, the agitator is in the off state, and the hydrocyclone grit chamber has a good sand discharge effect.

[0031] From the above, it can be seen that compared with the traditional cyclone grit chamber, the hydraulic cyclone grit chamber used for sewage treatment of the utility model can save the stirring equipment, does not require equipment maintenance, and can avoid affecting the operation of the sewage treatment plant due to problems with the stirring equipment; it also saves energy and reduces consumption, reduces carbon emissions, and is conducive to the sewage treatment plant to achieve "carbon neutrality".

[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model.

[0033] Therefore, no matter from which point of view, the embodiments should be regarded as illustrative and non-restrictive, and the scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A hydrocyclone grit chamber for sewage treatment, comprising a chamber body, wherein the chamber body has a water inlet and a water outlet, wherein the water inlet is connected to an inlet channel, and the water outlet is connected to an outlet channel, wherein: A sand collecting area is arranged in the pool body, and a sand settling area is connected above the sand collecting area. A sand lifting pipe, an air flushing pipe, and an air lift pipe are arranged in the sand collecting area. The sand lifting pipe extends upward from the top cover of the pool body and is connected to the sand discharge pipe; the air flushing pipe and the air lift pipe are connected in parallel to the compressed air pipe; the water inlet channel is set to a predetermined slope so that the flow velocity of the sewage to be treated in the water inlet channel is increased and enters the sand settling area along the tangential direction.

2. The hydrocyclone grit chamber for sewage treatment according to claim 1, characterized in that: The upper part of the cavity of the sand settling area is a cylindrical part, and the lower part is a frustum part. The cylindrical part is directly connected to the frustum part, and the sand collecting area is connected to the lower end of the frustum part. The upper end diameter of the frustum part is consistent with the diameter of the cylindrical part, and the lower end diameter of the frustum part is smaller than the upper end diameter.

3. The hydrocyclone grit chamber for sewage treatment according to claim 2, characterized in that: The upper end of the sand collecting area has the same diameter as the upper end of the frustum portion.

4. The hydrocyclone grit chamber for sewage treatment according to claim 3, characterized in that: The upper part of the inner cavity of the sand collecting area is a cylindrical cavity structure, and the lower part is a conical platform cavity structure.

5. The hydrocyclone grit chamber for sewage treatment according to claim 1, characterized in that: A pipeline installation block is arranged in the middle of the top cover, and a pipeline installation hole is provided on the installation block.

6. The hydrocyclone grit chamber for sewage treatment according to claim 5, characterized in that: The mounting block is detachably connected to the top cover.

7. The hydrocyclone grit chamber for sewage treatment according to claim 1, characterized in that: The water inlet is communicated with the sand settling area, and the water inlet channel is arranged on one side of the pool body.

8. The hydrocyclone grit chamber for sewage treatment according to claim 1, characterized in that: The water outlet is communicated with the sand settling area, and the water outlet channel is arranged on one side of the pool body.

9. The hydrocyclone grit chamber for sewage treatment according to claim 1, characterized in that: The interior of the pool body is poured with concrete to form the sand collecting area and the sand settling area.

Images