Precipitating and filtering device for drainage channel of gravel factory

Abstract

The utility model belongs to the technical field of pavement drainage, and particularly discloses a sediment filtering device for a drainage channel of a gravel factory, which comprises a drainage channel, a sediment filtering tank is connected onto the drainage channel, and the sediment filtering tank is divided into an access transition section, a middle section and an access transition section; the middle section is wider than the drainage channel and is smoothly connected with an outlet and an inlet of the drainage channel through the access transition section and the outlet transition section respectively, a bottom plate of the precipitation filter tank is concave downwards, a filter cage is mounted on the bottom plate, a filter screen is arranged at the bottom of the filter cage, a grid is arranged at the outlet end of the filter cage, and a trapezoidal weir is arranged in the drainage channel behind the grid. After rainwater or production wastewater enters the precipitation filter tank through the drainage channel, pollution particles are precipitated in the filter cage arranged in the precipitation filter tank, and floating objects are intercepted in the filter cage by the grating, so that the clogging risk of structures such as a downstream pipeline, an inspection well and a water pool is reduced, and meanwhile, the accumulation of precipitates in the initial rainwater collection pool and the wastewater collection pool is reduced; and the pressure of wastewater treatment is relieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of road drainage, and in particular relates to a sedimentation filtering device for a drainage channel of a sandstone factory. Background Art

[0002] At present, the initial rainwater and production wastewater of large domestic sand and gravel factories need to be collected and treated in a unified manner in the wastewater treatment system to meet the standards before reuse. Considering the reasons of cost saving, reducing siltation and convenient maintenance, the rainwater of sand and gravel factories and the wastewater seepage of finished aggregate yards are often collected by a combination of open channels and pipelines. The aggregate production wastewater mainly contains inorganic pollutant particles with high density such as stone powder and mud residue. The main pollutants in the initial rainwater of sand and gravel factories are also stone powder and mud residue produced in the aggregate production process.

[0003] The collection and treatment process of initial rainwater and landfill wastewater mainly involves collecting rainwater and wastewater in the upstream open channel. When the downstream burial depth is large, the water is transported to the initial rainwater collection pool and the wastewater collection pool respectively through pipes, and then pressurized to the wastewater treatment system for treatment and reuse in production. Existing collection channels generally do not have sedimentation or filtration facilities. Therefore, when pipes are used for collection at a large burial depth downstream of the collection system, pipes and inspection wells are prone to clogging. Similarly, initial rainwater collection pools and wastewater collection pools are also prone to accumulation of sediments such as stone powder and mud residue, and the removal of inorganic pollution particles in initial rainwater and production wastewater depends entirely on the wastewater treatment facilities at the end, which puts a large load on the wastewater treatment facilities. Utility Model Content

[0004] In order to solve the above technical problems, the utility model designs a sedimentation and filtration device for the drainage channel of a sand and gravel factory, which can collect inorganic particles with higher density such as stone powder and mud residue in the initial rainwater of the sand and gravel factory and the wastewater seeping from the yard through sedimentation and filtration, thereby reducing the risk of clogging of downstream pipelines, inspection wells, pools and other structures, and alleviating the treatment pressure of wastewater treatment facilities.

[0005] In order to achieve the above technical purpose, the utility model is realized through the following technical scheme: a sedimentation filtration device for a drainage channel of a sand and gravel factory, comprising a drainage channel, the drainage channel is connected to a sedimentation filtration tank, the sedimentation filtration tank is divided into an incoming gradient section, an intermediate section and an outgoing gradient section; the width of the intermediate section is greater than the width of the drainage channel, and is smoothly connected to the outgoing gradient section and the outlet and inlet of the drainage channel through the incoming gradient section, respectively; the bottom plate of the sedimentation filtration tank is concave, a filter cage is installed on the bottom plate, a filter screen is arranged at the bottom of the filter cage, a grille is arranged at the outlet end of the filter cage, and a trapezoidal weir is arranged in the drainage channel behind the grille.

[0006] Two lifting pieces are arranged on the top of the filter cage.

[0007] Beneficial effects: Compared with the prior art, after the initial rainwater or industrial wastewater enters the sedimentation filter tank through the drainage channel, the width of the sedimentation filter tank is greater than the width of the drainage channel, the bottom elevation of the sedimentation filter tank is lower than the elevation of the channel access port, the flow cross-section increases, and the water flow carrying suspended particles such as stone powder and mud slows down in the sedimentation filter tank. A trapezoidal weir is provided at the outlet of the sedimentation filter tank, and the flow velocity increases rapidly when the water flows out of the sedimentation filter tank. Therefore, when the water flows through the sedimentation filter tank, some inorganic pollution particles with higher density are precipitated in the filter cage provided in the sedimentation filter tank, and larger floating objects are retained in the filter cage by the grille, thereby reducing the risk of clogging of downstream pipelines, inspection wells, pools and other structures, while reducing the accumulation of sediment in the initial rain collection pool and the wastewater collection pool, alleviating the treatment pressure of wastewater treatment facilities. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for describing the embodiments.

[0009] Figure 1 It is a schematic diagram of the overall structure of the sedimentation and filtration device in Example 1.

[0010] Figure 2 It is a schematic diagram of the connection structure between the drainage channel and the sedimentation filter tank in Example 1.

[0011] Figure 3 It is a schematic diagram of the filter cage structure in Example 1.

[0012] Figure 4 It is a side cross-sectional view of the entire sedimentation filtration device in Example 1.

[0013] In the accompanying drawings, the structural names represented by the reference numerals are:

[0014] 1-sedimentation and filtration tank, 101-bottom plate, 2-inlet gradient section, 3-outlet gradient section, 4-trapezoidal weir, 5-filter cage, 6-filter screen, 7-grid, 8-lifting piece, 9-drainage channel. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0016] Example 1: To reduce the risk of clogging of downstream pipes, inspection wells, pools and other structures of the sand and gravel factory drainage channel 9, and at the same time relieve the treatment pressure of wastewater treatment facilities. Figures 1 to 4As shown, a sedimentation and filtration device for a drainage channel of a sandstone factory is proposed, comprising a drainage channel 9, a sedimentation and filtration tank 1 connected to the drainage channel 9, the sedimentation and filtration tank 1 being divided into an access gradient section 2, an intermediate section, and an outlet gradient section 3, the width of the intermediate section being more than 1.8 times the width of the drainage channel 9, and the outlet and inlet of the drainage channel 9 are smoothly connected through the access gradient section 2, the outlet gradient section 3, and the drainage channel 9, respectively, so that the flow cross section from the drainage channel 9 to the sedimentation and filtration tank 1 is increased, while the flow cross section from the sedimentation and filtration tank 1 to the drainage channel 9 is reduced, and the bottom plate 101 of the sedimentation and filtration tank 1 is concave, and the bottom plate 101 is low. The bottom surface of the drainage channel 9 is provided with a stainless steel filter mesh 6, and a grille 7 is provided at the outlet end of the filter cage 5, and the spacing between the grille bars is within 0.05m. A trapezoidal weir 4 is cast in concrete in the drainage channel 9 behind the grille 7, and the height of the trapezoidal weir 4 is above 0.15m.

[0017] When using open channels to collect rainwater or production wastewater from a sand and gravel factory, rainwater or wastewater flows into the drainage channel 9 and enters the access gradient section 2 to introduce water into the sedimentation filter tank 1. During the process, the flow cross-section increases, the water flow rate slows down, and some of the high-density stone powder, mud residue and other solid particles carried in the water sink into the stainless steel filter screen 6 at the bottom of the filter cage 5. Then, when the water flows through the access gradient section 3 and flows out to the trapezoidal weir 4, the flow rate increases, and the high-density solid particles at the bottom of the water flow are further intercepted and fall back to the stainless steel filter screen 6 at the bottom of the filter cage 5, and the larger floating debris is intercepted by the grille 7 at the outlet end of the filter cage 5. The clogging risk of downstream pipelines, inspection wells, pools and other structures is reduced, and the accumulation of sediment in the initial rain collection pool and the wastewater collection pool is reduced, which relieves the treatment pressure of wastewater treatment facilities.

[0018] The collected solid particles such as stone powder and mud are deposited in the filter cage 5. Since the bottom plate 101 of the sedimentation filter tank 1 is lower than the access port of the drainage channel 9, the deposited stone powder, mud and other sediments will not affect the flow section size of rainwater or wastewater. Therefore, when the accumulated height of the sediment is close to the channel inlet height, it can be cleaned periodically.

[0019] In order to facilitate manual cleaning of the sedimentation and filtration device, two lifting pieces 8 are arranged on the top of the filter cage 5. The filter cage 5 can be quickly lifted by holding the two lifting pieces 8 on the top of the filter cage 5. The stainless steel filter screen 6 at the bottom of the filter cage 5 filters out the residual water, and the deposited stone powder, mud residue and larger floating debris are retained in the filter screen 6, and the filter cage 5 can be dumped for cleaning.

[0020] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all details in detail, nor do they limit the utility model to only the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification.

Claims

1. A sedimentation and filtration device for a drainage channel of a sand and gravel factory, comprising a drainage channel (9), characterized in that: The drainage channel (9) is connected to a sedimentation filter tank (1), which is divided into an incoming gradient section (2), an intermediate section, and an outgoing gradient section (3). The width of the intermediate section is greater than the width of the drainage channel (9), and is smoothly connected to the outgoing gradient section (3) and the outlet and inlet of the drainage channel (9) through the incoming gradient section (2). The bottom plate (101) of the sedimentation filter tank (1) is concave, and a filter cage (5) is installed on the bottom plate (101). A filter screen (6) is arranged at the bottom of the filter cage (5), a grille (7) is arranged at the outlet end of the filter cage (5), and a trapezoidal weir (4) is arranged in the drainage channel (9) behind the grille (7).

2. The sedimentation and filtration device for drainage channels in a sand and gravel factory according to claim 1, characterized in that: Two lifting members (8) are arranged on the top of the filter cage (5).

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