CN218811142U

CN218811142U - Sewage pretreatment system

Info

Publication number: CN218811142U
Application number: CN202222817174.XU
Authority: CN
Inventors: 周新乃; 王鹏鹞; 莫新强
Original assignee: Penyao Enviromental Protection Co Ltd
Current assignee: Penyao Enviromental Protection Co Ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2023-04-07
Anticipated expiration: 2032-10-25

Abstract

The utility model discloses a sewage pretreatment systems, including the thin grid scrubbing device of pipeline intercommunication in proper order, sand setting desanding all-in-one, interior influent stream formula otter board grid scrubbing machine, sand setting desanding all-in-one includes the support, nested inner tube and urceolus about the support layout, the inner tube top is uncovered, the uncovered department of inner tube is equipped with the overflow launder, the bottom is equipped with the intercommunication mouth of being connected with the urceolus inner chamber, the inlet tube has been arranged along the tangential direction of its section of thick bamboo wall to the inner tube, be equipped with the outlet pipe on the overflow launder, the urceolus bottom is equipped with the discharge gate, discharge gate department is equipped with the ascending screw conveyer of slope, the screw conveyer top is equipped with row's sand mouth. The utility model discloses well sand setting and degritting integrative design, through the screw conveyer sand discharge, occupation space is little, and the sand discharge is difficult for blockking up simultaneously.

Description

Sewage pretreatment system

Technical Field

The utility model relates to a sewage pretreatment equipment field especially relates to a sewage pretreatment system.

Background

The sewage pretreatment is a pretreatment facility which is set according to the requirements of subsequent treatment processes on water quality before sewage enters the traditional sedimentation, biological treatment and the like, and is indispensable for the throat of a sewage treatment plant. The pretreatment mainly removes large blocks of dirt, gravel and the like in a suspended state or a floating state in the sewage so as to ensure the safe operation of a treatment system. Pretreatment typically involves coarse and fine grating, grit, and the like. In order to ensure that the sewage lift pump is not blocked and is stably operated in a high-efficiency state for a long time, a coarse grating is arranged in front of the pump. The fine grid is arranged behind the lift pump, so that solid suspended matters with smaller sizes can be effectively removed, the COD load entering a biological treatment system is reduced, the ratio of MLVSS to MLSS in the biological pond is improved, the active sludge amount in the biological system is increased, the purpose of reducing the sludge load is achieved, and the normal operation of subsequent treatment structures and equipment is ensured.

In the pretreatment facilities of the existing sewage treatment plant, a civil structure is generally adopted as a main part, a rotational flow grit chamber is used for removing large inorganic gravel with the diameter of more than 200 mu m, and sand-water separation is carried out on a sand-water mixture discharged from the grit chamber through a sand-water separator, and the system mainly has the following problems: 1. the conventional rotational flow grit chamber needs to be provided with a mechanical impeller to accelerate the flow velocity of sewage; 2. the inlet and the outlet of the grit chamber are positioned above the mechanical impeller, and the rotation of the mechanical impeller causes low sand removal efficiency; 3. the cyclone sand setting equipment and the sand-water separation equipment are separately arranged, so that the occupied area is large; 4. the sand settling tank adopts air stripping or pump sand discharge, which is easy to cause the blockage of a sand discharge pipe.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a sewage pretreatment systems.

The utility model discloses an it is integrative design that the innovation point lies in sand setting and degritting, through the screw conveyer sand discharge, occupation space is little, and the sand discharge is difficult for blockking up simultaneously.

In order to realize the purpose of the utility model, the technical proposal of the utility model is that:

the utility model provides a sewage pretreatment system, includes the thin grid scrubbing device, sand setting and degritting all-in-one, the interior inflow formula otter board grid scrubbing machine of pipeline intercommunication in proper order, a serial communication port, sand setting and degritting all-in-one includes the support, nested inner tube and urceolus about the support arrangement, the inner tube top is uncovered, inner tube uncovered department is equipped with the overflow launder, the bottom is equipped with the intercommunication mouth of being connected with the urceolus inner chamber, the inlet tube has been arranged along the tangential direction of its section of thick bamboo wall to the inner tube, be equipped with the outlet pipe on the overflow launder, the urceolus bottom is equipped with the discharge gate, discharge gate department is equipped with the ascending screw conveyer that inclines, the screw conveyer top is equipped with the sand discharge mouth.

Carry out the preliminary treatment in proper order through fine grid scrubbing device, sand setting and degritting all-in-one, interior influent flow formula otter board grid scrubbing machine, wherein sand setting and degritting all-in-one passes through screw conveyer sand discharge, is difficult for blockking up, adopts the mode of sand setting and degritting integrative design, the whole prefabrication of equipment, field installation, reduces investment cost and working costs, reduces construction cycle, can reduce equipment fault rate simultaneously, reduces equipment area.

Preferably, an exhaust pipe communicated with the outside is inserted into the top of the inner cavity of the outer cylinder. Because the inner cylinder is nested on the outer cylinder, part of gas higher than the communicating port can not be discharged from the communicating port, the outer cylinder forms an air cavity, the capacity of the inner cavity of the outer cylinder is reduced, and the gas is flammable and explosive, has potential safety hazards, and is added with the exhaust pipe.

Preferably, a sand discharge port is provided with a sand dropping pipe, and the bottom of the sand dropping pipe is provided with a trolley. The garbage collected by the cart is cleaned regularly, and the cart is convenient for workers to transfer.

Preferably, the screw conveyer comprises a cylindrical housing, a rotating shaft arranged in the housing, a helical blade on the rotating shaft and a motor for driving the rotating shaft to rotate, wherein the motor is arranged at the top end of the screw conveyer, and a vent is arranged at the bottom end of the screw conveyer. The motor is arranged on the top end, potential safety hazards do not exist, and the emptying port is convenient for cleaning the screw conveyer.

Preferably, the outer edge of the helical blade is provided with a brush which contacts the casing. The inner wall of the housing is cleaned through the brush, so that the housing can be kept clean, and the service life of equipment is prolonged.

Preferably, the spiral blades close to the top of the spiral conveyor are provided with a plurality of filter holes. The water in the solid garbage conveyed by the screw conveyor falls through the filtering holes, so that the water in the solid garbage is reduced.

Preferably, a water outlet cofferdam is arranged at the opening of the inner cylinder. The garbage is filtered through the water outlet cofferdam, and the garbage flowing into the inner inflow type screen plate grid sewage removal machine is reduced.

Preferably, the inner barrel comprises an upper cylindrical advection section and a lower conical centrifugation section, the water inlet pipe being arranged on the centrifugation section. The adoption is intake down, goes up the structural style of water outlet, has reduced the influence of turbulent flow and short stream, has improved sand removal efficiency, adopts conical centrifugation section to reduce the cross-section of crossing simultaneously, has improved the tangential velocity of flow of sewage, has improved the centrifugal force of sand grain in the sewage, has saved the mechanical impeller for improving sand grain centrifugal force, has reduced working costs and equipment investment.

The utility model has the advantages that:

1. the utility model discloses well sand setting and degritting integrative design, through the screw conveyer sand discharge, occupation space is little, and the sand discharge is difficult for blockking up simultaneously.

2. The utility model discloses the rubbish that the regular clearance shallow was collected in well, and the staff of being convenient for of shallow shifts.

3. The utility model discloses in adopt conical centrifugal section to reduce and cross the water section, improved the tangent line velocity of flow of sewage, improved the centrifugal force of sand grain in the sewage, saved the mechanical impeller for improving sand grain centrifugal force, reduced working costs and equipment investment.

Drawings

Fig. 1 is a top view of the present invention.

FIG. 2 is a front view of the sand setting and removing integrated machine.

Fig. 3 is a schematic structural view of the helical blade.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

Example 1: as shown in fig. 1, 2 and 3, a sewage pretreatment system comprises a fine grid dirt removing device 1, a sand setting and removing integrated machine 2 and an inner inflow type screen grid dirt removing machine 3 which are sequentially communicated through a pipeline, wherein the sand setting and removing integrated machine 2 comprises a support 2.10, an inner cylinder 2.1 and an outer cylinder 2.2 which are nested up and down are arranged on the support 2.10, the top of the inner cylinder 2.1 is open, an overflow groove 2.3 and a water outlet cofferdam 2.4 are arranged at the opening of the inner cylinder 2.1, a communication port 2.13 connected with an inner cavity of the outer cylinder 2.2 is arranged at the bottom of the inner cylinder, a water inlet pipe 2.5 is arranged in the tangential direction of the cylinder wall of the inner cylinder 2, the inner cylinder comprises a cylindrical advection section 2.11 at the upper part and a conical centrifugal section 2.12 at the lower part, the water inlet pipe 2.5 is arranged on the centrifugal section 2.12, a water outlet pipe 2.6 is arranged on the overflow groove 2.3, an exhaust pipe 2.7 is inserted at the top of the inner cavity of the outer cylinder 2.2, a discharge pipe 2.7 communicated with the outside, a discharge port 2.2 is arranged at the bottom of the outer cylinder 2.2.2, a discharge port 2.21, a spiral conveyer 2.7 is arranged at the top of the inclined sand falling pipe 71, and a sand discharging pipe 71 is arranged at the top of a inclined falling pipe 2.8, and a sand discharging carriage 71 is arranged at the top of a sand falling pipe 71; the screw conveyer 2.7 comprises a cylindrical housing 2.72, a rotating shaft 2.73 arranged in the housing 2.72, a helical blade 2.74 on the rotating shaft 2.73 and a motor 2.75 for driving the rotating shaft 2.73 to rotate, wherein the motor 2.75 is arranged at the top end of the screw conveyer 2.7, a vent 2.76 is arranged at the bottom end of the screw conveyer 2.7, a brush 2.741 in contact with the housing 2.72 is arranged at the outer edge of the helical blade 2.74, and a plurality of filter holes 2.742 are arranged on the helical blade 2.74 close to the top of the screw conveyer.

When the device works, sewage firstly passes through the fine grid dirt removing device 1 to treat floating solids, the filtered sewage enters the sand setting and sand removing integrated machine 2 from the water inlet pipe 2.5, the sewage forms rotational flow, centrifugal sand removal is carried out, the sewage is precipitated at the bottom of the outer barrel, the sewage flows into the overflow groove 2.3 from an opening at the top of the inner barrel 2.1 and flows out from the water outlet pipe 2.6, sand and stones enter an inner cavity of the outer barrel 2.2 through the communication port 2.13 and enter the bottom of the screw conveyor 2.7 from the discharge port 2.21, the motor 2.75 of the screw conveyor 2.7 drives the rotating shaft 2.73 to rotate, the screw blades 2.74 rotate to drive the sand and stones to ascend, the sand and stones are discharged from the sand discharge port 2.71 and enter the cart 2.9 through the sand dropping pipe 2.8; the sewage after sand removal enters an internal inflow type screen plate grid dirt separator 3 to remove solid garbage.

The described embodiments are only some, but not all embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Claims

1. The utility model provides a sewage pretreatment system, includes fine grid scrubbing device, sand setting desanding all-in-one, the interior influent stream formula otter board grid scrubbing machine of pipeline intercommunication in proper order, a serial communication port, sand setting desanding all-in-one includes the support, nested inner tube and urceolus about the support arrangement, the inner tube top is uncovered, the uncovered department of inner tube is equipped with the overflow launder, the bottom is equipped with the intercommunication mouth of being connected with the urceolus inner chamber, the inlet tube has been arranged along the tangential direction of its section of thick bamboo wall to the inner tube, be equipped with the outlet pipe on the overflow launder, the urceolus bottom is equipped with the discharge gate, discharge gate department is equipped with the ascending screw conveyer of slope, the screw conveyer top is equipped with the sand discharge mouth.

2. The sewage pretreatment system of claim 1, wherein an exhaust pipe communicating with the outside is inserted into the top of the inner cavity of the outer tub.

3. The sewage pretreatment system of claim 1, wherein a sand discharge port is provided with a sand dropping pipe, and a cart is arranged at the bottom of the sand dropping pipe.

4. The wastewater pretreatment system of claim 1, wherein the screw conveyor comprises a cylindrical housing, a rotating shaft arranged in the housing, a helical blade on the rotating shaft, and a motor driving the rotating shaft to rotate, the motor is arranged at the top end of the screw conveyor, and a vent is arranged at the bottom end of the screw conveyor.

5. The wastewater pretreatment system of claim 4, wherein an outer edge of the helical blade is provided with a brush contacting the housing.

6. The wastewater pretreatment system of claim 4, wherein a plurality of filter holes are disposed on the spiral blade near the top of the spiral conveyor.

7. The wastewater pretreatment system of claim 1, wherein an outlet weir is disposed at the inner barrel opening.

8. The wastewater pretreatment system of claim 1, wherein the inner barrel comprises an upper cylindrical advection section and a lower conical centrifugation section, the inlet tube being disposed on the centrifugation section.