Search

CN-121971891-A - Assembled disc-folding hydraulic sand setting tank for sewage treatment plant

CN121971891ACN 121971891 ACN121971891 ACN 121971891ACN-121971891-A

Abstract

The invention relates to the technical field of sewage treatment, in particular to an assembled disc-stacked hydraulic sand setting tank for a sewage treatment plant. The assembled disc-stacked hydraulic sand setting tank for the sewage treatment plant comprises a disc-stacked module device, an unpowered water distribution device and a back flushing and fluidization device, wherein the disc-stacked module device comprises a plurality of disc stacks which are sequentially arranged at intervals along the up-down direction, a water outlet channel is formed between two adjacent disc stacks, and a water outlet is formed in the inner side of each disc stack. According to the assembled disc stack hydraulic grit chamber for the sewage treatment plant, provided by the invention, the water flow is sprayed to the inner surface of the disc stack through the cleaning disc assembly, so that the inner surface of the disc stack is washed, an automatic back flushing function is realized, the problem of sand accumulation of the disc stack is effectively solved, and sand hardening is prevented. The automatic back flushing function greatly reduces the frequency and intensity of manual cleaning, reduces the manual labor intensity and potential safety hazard, avoids the stacked disc from being blocked, and prolongs the service life of the stacked disc.

Inventors

  • LI XUETING
  • QIAN LIANG
  • LI RUOHAN
  • ZHU DEBIN
  • WANG XIUWEN

Assignees

  • 浦华环保有限公司
  • 浦华水务(北京)有限公司

Dates

Publication Date
20260505
Application Date
20251212

Claims (10)

  1. 1. An assembled disc stack hydraulic grit chamber for a sewage treatment plant, comprising: The disc stacking module device (10), the disc stacking module device (10) comprises a plurality of disc stacks (11) which are sequentially arranged at intervals along the up-down direction, a water outlet channel (12) is formed between two adjacent disc stacks (11), a water outlet (13) is formed in the inner side of each disc stack (11), a water inlet is formed in the outer side of each disc stack (11), and a lower port (14) is formed in the bottom of each disc stack (11); an unpowered water distribution device (20), wherein the unpowered water distribution device (20) is communicated with the water inlet of each stacking disc (11), and the unpowered water distribution device (20) is used for inputting sewage to the water inlet of each stacking disc (11); the back flushing and fluidizing device (30) comprises a water distribution main pipe (31) and a plurality of cleaning disc assemblies, wherein the cleaning disc assemblies are arranged at intervals along the upper and lower directions, the cleaning disc assemblies are arranged above the lower ports (14) of the stacking discs (11) in a one-to-one correspondence manner, the water distribution main pipe (31) is communicated with the cleaning disc assemblies, and the cleaning disc assemblies are used for spraying water flow to the inner surfaces of the stacking discs (11) so as to flush the inner surfaces of the stacking discs (11).
  2. 2. The assembled disc stack hydraulic grit chamber for sewage treatment plants according to claim 1, characterized in that said stack (11) comprises: The disc stacking device comprises a disc stacking main body (15), wherein an opening is formed in the upper end of the disc stacking main body (15), the lower end of the disc stacking main body (15) forms a lower port (14), and the water inlet is formed in the upper edge of the outer side of the disc stacking main body (15); The annular flow guide plate (16), the annular flow guide plate (16) set up in the opening of folding dish main part (15), annular flow guide plate (16) with form annular runner between folding dish main part (15), annular flow guide plate (16) lower limb with form between folding dish main part (15) delivery port (13), annular runner with delivery port (13) and water inlet intercommunication.
  3. 3. The assembled disc stack hydraulic grit chamber for sewage treatment plants according to claim 2, characterized in that the annular deflector (16) is detachably connected to the disc stack body (15).
  4. 4. The assembled disc stack hydraulic grit chamber for sewage treatment plants according to claim 2, characterized in that said disc stack (11) further comprises: The plurality of connecting pieces (17) are arranged on the periphery of the disc stack main body (15) at intervals along the circumferential direction, the lower end of the connecting piece (17) of the upper layer of disc stack (11) is abutted against the upper end of the connecting piece (17) of the lower layer of disc stack (11), and the connecting piece (17) is provided with a connecting hole extending up and down; The connecting rod (18), connecting rod (18) wears to locate in the same vertical straight line a plurality of connecting piece (17) connecting hole.
  5. 5. The assembled disc stack hydraulic grit chamber for a sewage treatment plant according to any one of claims 2 to 4, wherein the lower surface of the disc stack main body (15) is provided with reinforcing ribs (19), and the disc stack main body (15) is made of PE material.
  6. 6. The assembled disc stack hydraulic grit chamber for sewage treatment plants according to any one of claims 1 to 4, characterized in that said unpowered water distribution device (20) comprises: the device comprises a flow guide mechanism (21), wherein a flow guide cavity is arranged in the flow guide mechanism, and an inlet communicated with the flow guide cavity is arranged on one side of the flow guide mechanism; The plurality of reposition of redundant personnel cavitys (22), a plurality of reposition of redundant personnel cavity (22) are along upper and lower direction interval arrangement, a plurality of reposition of redundant personnel cavity (22) one end all with water conservancy diversion chamber intercommunication, a plurality of reposition of redundant personnel cavity (22) the other end with a plurality of fold water inlet one-to-one intercommunication of dish (11).
  7. 7. The fabricated disc stack hydraulic grit chamber for a wastewater treatment plant of claim 6, wherein the flow resistance coefficient of the diversion chamber (22) gradually decreases in a direction away from the inlet of the diversion mechanism.
  8. 8. The fabricated disc stack hydraulic grit chamber for a wastewater treatment plant of any one of claims 1 to 4, further comprising: and the stacking disc module device (10) is arranged above the bracket (40).
  9. 9. The fabricated disc stack hydraulic grit chamber for a wastewater treatment plant of any one of claims 1 to 4, wherein the cleaning disc assembly comprises: A disc back flushing fluidization ring (32), wherein the disc back flushing fluidization ring (32) is communicated with the water distribution main pipe (31); And the disc back flushing nozzles (33) are circumferentially arranged at intervals and are communicated with the disc back flushing fluidization ring (32).
  10. 10. The assembled disc stack hydraulic grit chamber for sewage treatment plants according to any one of claims 1 to 4, characterized in that said back flushing and fluidization device (30) further comprises: The sand hopper back flushing fluidization ring (34), the sand hopper back flushing fluidization ring (34) is arranged at the lower end of the water distribution main pipe (31) and is communicated with the water distribution main pipe (31); The sand hopper back flushing nozzles (35) are circumferentially arranged at intervals and are communicated with the sand hopper back flushing fluidization ring (34).

Description

Assembled disc-folding hydraulic sand setting tank for sewage treatment plant Technical Field The invention relates to the technical field of sewage treatment, in particular to an assembled disc-stacked hydraulic sand setting tank for a sewage treatment plant. Background In the urban sewage and industrial wastewater treatment process, the grit chamber is used as a core structure of the pretreatment unit, and the core function of the grit chamber is to efficiently remove inorganic sand grains, gravel and other high-density solid particles in the sewage. The effective interception of the substances has important significance for protecting key equipment such as a subsequent water pump, an aeration system, a sludge reflux pump and the like from being damaged by abrasion, preventing a biochemical treatment unit pool from being easily damaged by sand accumulation and maintaining the stability of organic components of the sludge. Currently, the mainstream sand setting technology widely applied in industry mainly comprises a advection sand setting tank, an aeration sand setting tank and a mechanical rotational flow sand setting tank. The advection grit chamber is used as the most traditional process, and the working principle of the advection grit chamber depends on greatly reducing the flow velocity of water flow in a linear gallery, so that inorganic particles naturally settle under the action of gravity. The process has the advantages of simple structure and lower operation cost, but has the obvious defects of large occupied area, extremely low surface load rate, extremely limited removal efficiency of fine sand grains (the grain size is less than 200 mu m), easy adhesion of the settled sand at the bottom of the tank and organic matters, poor subsequent sand-water separation effect and higher content of the sand-yielding organic matters. The aeration sand setting tank is characterized in that an aeration pipe is arranged at one side of the tank bottom, so that the friction separation of sand grains and organic matters is realized under the transverse rotational flow state of sewage. The process improves the cleanliness of sand production to a certain extent and has a certain pre-aeration function. However, the operation energy consumption is obviously increased, the electric power consumption of the blower required by continuous aeration constitutes main operation cost, the interception capability of the blower on fine sand grains is still insufficient, in addition, the problem of odor dissipation is outstanding due to the open water surface design, complex deodorization facilities are required to be built in a matched mode, and the investment and the operation and maintenance complexity are increased. The mechanical cyclone sand basin drives the paddles to rotate through a central driving device, and a forced vortex field is formed in the basin. By the synergistic effect of centrifugal force and gravity, the sand separation efficiency is improved, and the occupied area is relatively small. However, the technical limitations are obvious, the mechanical transmission parts (such as a gear motor, a gear and a bearing) are immersed in the sand-containing sewage for a long time, the risks of abrasion and corrosion are severe, the failure rate is high, the maintenance workload is high, the cost is high, the design standard is still mainly aimed at sand grains with the size of more than 200 mu m, and the removal efficiency of finer grains is rapidly reduced along with the reduction of the grain size. In order to break through the technical bottleneck of the traditional sand setting process, in particular to improve the removal precision of fine sand grains, a plurality of multilayer rotational flow sand setting technologies based on the combination of a shallow layer sedimentation theory and a hydrocyclone principle gradually appear in the industry, and the technology is widely focused due to high treatment efficiency of unit area. The existing multilayer rotational flow sand removal technology is in a fixed installation mode, daily cleaning and maintenance are extremely difficult, fine sand, grease and fibers are easy to form deposition on the front surface of the stacked disc and the edge of the central hole, and therefore the effective water cross section of the disc is reduced, the head loss is suddenly increased, and the sand removal effect is reduced. Disclosure of Invention The invention provides an assembled disc stack hydraulic sand setting tank for a sewage treatment plant, which is used for solving the problems that the conventional multilayer rotational flow sand setting device is inconvenient to clean and sediment influences the sand removal effect. The invention provides an assembled disc-stacked hydraulic sand basin for a sewage treatment plant, which comprises the following components: The stacking disc module device comprises a plurality of stacking discs which are sequentially arranged at intervals a