Machine-made sand washing sewage desliming device

Abstract

The invention discloses a machine-made sand washing sewage desliming device, and belongs to the technical field of sand washing sewage treatment. Comprising a sewage desliming treatment box and a water storage pond arranged below the sewage desliming treatment box, an energy dissipation groove is formed in a sewage inlet of the sewage desliming treatment box, double-layer desliming assemblies are arranged in the sewage desliming treatment box, scraping plates are arranged above the double-layer desliming assemblies, and the scraping plates are arranged above the double-layer desliming assemblies. A sewage outlet is formed in the position, corresponding to the double-layer desliming assembly, of the side wall of the sewage desliming treatment box, and the double-layer desliming assembly is connected with the sewage desliming treatment box through a supporting assembly. Sewage treated by the device structure is low in silt content, the requirement for recycling sand washing water can be completely met, and the physical treatment method is high in efficiency, environmentally friendly and good in economic effect.

Description

Technical Field

[0001] The present invention relates to the technical field of washing sand sewage treatment, and in particular to a device for de-sludging washing sand sewage of machine-made sand. Background Art

[0002] The treatment methods for washing sand sewage are divided into chemical treatment and physical treatment. Among them, although the chemical treatment method is easy to operate, the chemical residues are difficult to clean up completely, and in severe cases, it even affects the production and use of concrete, causing serious waste of resources and secondary pollution of the river channel. Moreover, the existing traditional physical washing sand sewage treatment methods are prone to leaving fine sand residues during the working process, which makes the concrete surface uneven when used in concrete structures, affecting the appearance of the building. Therefore, how to improve the cleanliness of washing sand sewage so that it can be recycled is a difficult problem faced by the sand and gravel aggregate field. However, up to now, the relevant achievements are very limited.

[0003] For example, in the sand washing sewage treatment device disclosed in CN202322535257.4, a flocculation tank is fixedly installed on a hardened ground. The sand washing sewage is subjected to flocculation treatment in the flocculation tank, and the generated clear water enters the water outlet channel through an overflow weir, and then is discharged to a buffer pool through a water outlet. The clear water in the buffer pool is returned to the sand washing area through a delivery pump. This patent uses a chemical reagent flocculant to treat the sand washing sewage. Although the treatment method is simple, the problem of flocculant residue is not considered. In the sand washing wastewater treatment machine disclosed in CN202222893961.2, the connecting pipe of the wastewater treatment mechanism is connected to the drain outlet of the sand washing machine main body, so that the wastewater enters the box body. The impurities are filtered through the difference of the filter screen. The filtered purified water is pumped into the sand washing machine main body for use again through a pump body. At the same time, a support shaft is driven to rotate by a servo motor, so that the support shaft drives the outer scraper assembly and the inner scraper assembly to rotate, and the blocked impurities on the outer and inner sides of the filter screen are removed. The filter screen of the device described in this patent is relatively single and the treatment efficiency is low. If the particle size levels of the sediment in the treated sewage are relatively complex, it is very difficult to filter out the fine impurities. In the sand washing sewage treatment device disclosed in CN202322355484.9, the glass fiber, polyester limit, stainless steel mesh and activated carbon in the sewage tank filter element are used to combine and filter the sewage, but no relevant silt cleaning facilities are set. After long-term operation, impurities will accumulate, and the filter element components need to be frequently replaced to ensure production. The sand washing sewage treatment device disclosed in CN202321144250.3 includes a sewage box body, a reduction box body, an impurity sedimentation and recovery box body, a rotating sand taking impeller and a driving device. The reduction box body is arranged at the front end of the sewage box body, and the impurity sedimentation and recovery box body is arranged on the left side and / or the right side of the sewage box body. The reduction box body and the sewage box body are communicated at the bottom, and the impurity sedimentation and recovery box body and the sewage box body are communicated at the lower part; the rotating impeller is arranged in the sewage box body, and a plurality of water filtering hoppers are arranged on the outer circumference of the rotating impeller along the circumferential direction; the rotating impeller is connected to the driving device and rotates under the drive of the driving device. This patent requires a large number of devices and complex processes.

[0004] Most of the existing sand washing sewage treatment devices have problems such as a large amount of chemical residues, more treatment processes, more complex procedures, or it is very difficult to filter out sewage impurities. In view of the above problems, the present invention proposes a new type of mechanism sand washing sewage de-sludging device. Summary of the Invention

[0005] The purpose of the present invention is to provide a mechanism sand washing sewage de-sludging device. By setting two filtration systems, various filtration levels can filter out impurities of various particle sizes, and solve the problems of incomplete treatment of sand washing sewage, a large amount of sediment residue, and low production efficiency mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides a mechanism sand washing sewage de-sludging device, which includes a sewage de-sludging treatment tank and a water storage tank arranged below the sewage de-sludging treatment tank. An energy dissipation tank is arranged at the sewage inlet of the sewage de-sludging treatment tank. A double-layer de-sludging component is arranged in the sewage treatment tank. Scrapers are arranged above the double-layer de-sludging components. Sewage discharge ports are opened at positions on the side wall of the sewage de-sludging treatment tank corresponding to the double-layer de-sludging components. The double-layer de-sludging components are connected to the sewage de-sludging treatment tank through support components respectively.

[0007] Preferably, the support component is composed of a steel structure of wire gauze and steel bar mesh. The double-layer de-sludging component includes a double geotextile powder sand de-sludging filter layer and a double geotextile filter membrane de-sludging filter layer. The filtration pores of the double geotextile powder sand de-sludging filter layer are larger than the filtration voids of the double geotextile filter membrane de-sludging filter layer.

[0008] Preferably, the double geotextile powder sand de-sludging filter layer is directly connected to the sewage de-sludging treatment tank through a snap sliding connection. The installation inclination angle of the double geotextile powder sand de-sludging filter layer is ≤20°, and it is a three-side enclosure structure on the left, right and bottom sides.

[0009] Preferably, the double geotextile filter membrane de-sludging filter layer is directly connected to the sewage de-sludging treatment tank through a snap sliding connection. The installation inclination angle of the double geotextile filter membrane de-sludging filter layer is ≤15°, and it is a three-side enclosure structure on the left, right and bottom sides.

[0010] Preferably, the double geotextile powder sand de-sludging filter layer successively includes a first geotextile, fine sand and a second geotextile from top to bottom. The wire gauze and the steel bar mesh are successively arranged above the first geotextile as a support structure. The wire gauze and the steel bar mesh are successively arranged below the second geotextile as a support structure. Among them, the particle size of the fine sand is 0.075mm - 0.25mm.

[0011] Preferably, the double geotextile filter membrane de-sludging filter layer successively includes a third geotextile, a filter membrane and a fourth geotextile from top to bottom. The wire gauze and the steel bar mesh are successively arranged above the third geotextile as a support structure. The wire gauze and the steel bar mesh are successively arranged below the fourth geotextile as a support structure.

[0012] Preferably, the pore diameters of the first geotextile and the second geotextile are larger than those of the third geotextile and the fourth geotextile. The pore diameters of the third geotextile and the fourth geotextile are larger than the pore diameter of the filter membrane.

[0013] Preferably, the pore diameters of the first geotextile and the second geotextile are 0.07mm and 0.07mm respectively; the pore diameters of the third geotextile and the fourth geotextile are 0.01mm and 0.01mm respectively.

[0014] Therefore, the present invention adopts the above-mentioned mechanism sand washing sewage de-sludging device, and the specific beneficial effects are as follows: (1) The de-sludging device of the invention has a simple structure and convenient operation, can efficiently complete the treatment task of washing sand sewage, and at the same time can meet the needs of continuous production during maintenance and replacement, greatly improving the production efficiency and saving costs; (2) Compared with the chemical treatment method, the present invention adopts the physical treatment method, solves the problem of large chemical residues in the washing sand sewage generated by engineering construction, can effectively save engineering costs and reduce environmental pollution, and has significant social and economic benefits.

[0015] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Description of the Drawings

[0016] Figure 1 is a simple structural schematic diagram of an embodiment of the present invention; Figure 2 is the double geotextile fine sand de-sludging filter layer of an embodiment of the present invention; Figure 3 is the double geotextile filter membrane de-sludging filter layer of an embodiment of the present invention; Figure 4 is a schematic diagram of the connection relationship between the double de-sludging component and the inner side wall of the sewage de-sludging treatment tank in an embodiment of the present invention; Reference Signs 1. Sewage de-sludging treatment tank; 2. Water storage tank; 3. Scraper; 4. Drainage port; 5. Double geotextile fine sand de-sludging filter layer; 6. Double geotextile filter membrane de-sludging filter layer; 7. First geotextile; 8. Fine and medium sand; 9. Second geotextile; 10. Third geotextile; 11. Filter membrane; 12. Fourth geotextile. Detailed Embodiments

[0017] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains. The "first", "second" and similar terms used in the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0019] The specific connection methods of each part all adopt conventional means such as bolts, rivets, welding, etc. that are mature in the prior art. The machines, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be elaborated here.

[0020] Embodiment As Figures 1-4 As shown, this embodiment provides a mechanism sand washing sewage de-sludging device, which includes a sewage de-sludging treatment tank. An energy dissipation tank is provided at the sewage inlet of the sewage de-sludging treatment tank 1. A double-layer de-sludging assembly is also provided in the sewage treatment tank. The energy dissipation tank is used to slow down the water flow velocity and reduce the impact on the double-layer de-sludging assembly. The sewage is filtered by the double-layer de-sludging assembly, and the sludge is retained above it. Scrapers 3 are provided above both the double-layer de-sludging assemblies. A sewage discharge port 4 is opened at the position of the side wall of the sewage de-sludging treatment tank 1 corresponding to the double-layer de-sludging assembly. The scraper 3 is driven by an outer motor to push the retained sludge to the sewage discharge port 4 for discharge. A water storage tank 2 is provided below the sewage de-sludging treatment tank 1. The filtered sewage is discharged into the water storage tank 2, thereby realizing physical sewage de-sludging.

[0021] Both double-layer de-sludging assemblies are connected to the sewage de-sludging treatment tank 1 through support assemblies. The support assemblies are composed of three layers of steel structures, namely steel bars, wire meshes and steel bar meshes. The double-layer de-sludging assemblies include a double geotextile powder sand de-sludging filter layer 5 and a double geotextile filter membrane de-sludging filter layer 6. The filtration pores of the double geotextile powder sand de-sludging filter layer 5 are larger than the filtration voids of the double geotextile filter membrane de-sludging filter layer 6.

[0022] The double geotextile silt dewatering filter layer 5 is directly connected to the sewage dewatering treatment tank 1 through snap sliding connections. The installation inclination angle of the double geotextile silt dewatering filter layer 5 is ≤20°, and it has a surrounding structure on the left, right, and lower three sides to prevent sewage from overflowing from the sewage outlet 4. The double geotextile silt dewatering filter layer 5 successively includes a first geotextile 7, fine silt 8, and a second geotextile 9 from top to bottom. Above the first geotextile 7, the steel wire mesh and the steel bar mesh are successively arranged as a support structure. Below the second geotextile 9, the steel wire mesh and the steel bar mesh are successively arranged as a support structure. Among them, the particle size of the fine silt 8 is 0.075 mm - 0.25 mm. Filling between the first geotextile 7 and the second geotextile 9 can enhance the dewatering ability and prevent dewatering impurities from depositing in the gaps of the support steel structure, causing blockage.

[0023] The double geotextile filter membrane dewatering filter layer 6 is directly connected to the sewage dewatering treatment tank 1 through snap sliding connections. The installation inclination angle of the double geotextile filter membrane dewatering filter layer 6 is ≤15°, and it has a surrounding structure on the left, right, and lower three sides to prevent sewage from overflowing from the sewage outlet 4. The double geotextile filter membrane dewatering filter layer 6 successively includes a third geotextile 10, a filter membrane 11, and a fourth geotextile 12 from top to bottom. Above the third geotextile 10, the steel wire mesh and the steel bar mesh are successively arranged as a support structure. Below the fourth geotextile 12, the steel wire mesh and the steel bar mesh are successively arranged as a support structure. The filter membrane 11 is arranged between the third geotextile 10 and the fourth geotextile 12, which can protect the filter membrane 11 from being damaged and enhance the filtering ability at the same time.

[0024] The pore sizes of the first geotextile 7 and the second geotextile 9 are 0.07 mm and 0.07 mm respectively; the pore sizes of the third geotextile 10 and the fourth geotextile 12 are 0.01 mm and 0.01 mm respectively.

[0025] Working principle: The sewage after sand washing falls from the drain port through the sewage inlet into the energy dissipation tank in the sewage dewatering treatment tank 1 for deceleration and energy dissipation and then flows out and disperses. Then the low-speed sewage first passes through the double geotextile silt dewatering filter layer 5 to filter out impurities with a particle size of 0.07 mm and above, and then passes through the double geotextile filter membrane dewatering filter layer 6 for secondary filtration. The filtered sewage flows into the storage pool 2 below and is transported away for treatment in time. The sediment above the double dewatering components is respectively scraped to the sewage outlet 4 by the scraper 3 to be discharged, avoiding blockage caused by accumulation. The double dewatering components are clamped by steel structure support components and are connected to the inside of the sewage treatment tank through snap sliding connections. The double dewatering components can be overhauled and replaced without stopping production through a staggered unloading device, greatly improving the production efficiency.

[0026] Therefore, for a mechanism sand washing sewage dewatering device provided by the present invention, the sewage treated by this physical dewatering device for washing sand sewage has a low mud content, can fully meet the need for recycling the washing sand water, and the physical treatment method has high efficiency, is environmentally friendly, and has good economic effects.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that they can still modify or equivalently replace the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A machine-made sand washing wastewater desludging device, characterized in that: It includes a sewage desludging treatment box and a water storage tank arranged below the sewage desludging treatment box, an energy dissipation groove is arranged at the sewage inlet of the sewage desludging treatment box, a double-layer desludging assembly is arranged in the sewage treatment box, a scraper is arranged above the double-layer desludging assembly, a sewage outlet is opened on the side wall of the sewage desludging treatment box at a position corresponding to the double-layer desludging assembly, and the double-layer desludging assembly is connected to the sewage desludging treatment box through a supporting assembly.

2. The machine-made sand washing wastewater desludging device according to claim 1 is characterized by: The support component is composed of a steel structure of a wire mesh and a steel bar mesh, and the double-layer desludging component includes a double geotextile silt sand desludging filter layer and a double geotextile filter membrane desludging filter layer. The filtration pores of the double geotextile silt sand desludging filter layer are larger than the filtration voids of the double geotextile filter membrane desludging filter layer.

3. According to claim 2, a machine-made sand washing wastewater desludging device is characterized by: The double geotextile silt sand desludging filter layer is directly connected to the sewage desludging treatment box by a snap-fit ​​sliding connection. The installation inclination angle of the double geotextile silt sand desludging filter layer is ≤20°, and it is a left, right and lower three-side enclosure structure.

4. According to claim 3, a machine-made sand washing wastewater desludging device is characterized by: The double geotextile filter membrane desludging filter layer is directly connected to the sewage desludging treatment box through a snap-fit ​​sliding connection. The installation inclination angle of the double geotextile filter membrane desludging filter layer is ≤15°, and it is a left, right and lower three-side enclosure structure.

5. According to claim 4, a machine-made sand washing wastewater desludging device is characterized by: The double geotextile silt sand desludging filter layer includes a first geotextile, silt sand and a second geotextile from top to bottom, the steel bars are arranged above the first geotextile and are pressed into the silt sand along with the first geotextile, and the steel wire mesh and the steel bar mesh are arranged below the second geotextile as a supporting structure, wherein the particle size of the silt sand is 0.075mm-0.25mm.

6. According to claim 5, a machine-made sand washing wastewater desludging device is characterized by: The double geotextile filter membrane desludging filter layer includes a third geotextile, a filter membrane and a fourth geotextile from top to bottom. The steel bar is arranged above the third geotextile and is pressed into the filter membrane along with the third geotextile. The steel wire mesh and the steel bar mesh are arranged in sequence below the fourth geotextile as a supporting structure.

7. According to claim 6, a machine-made sand washing wastewater desludging device is characterized by: The pore sizes of the first geotextile and the second geotextile are larger than those of the third geotextile and the fourth geotextile, and the pore sizes of the third geotextile and the fourth geotextile are larger than the pore size of the filter membrane.

8. The machine-made sand washing wastewater desludging device according to claim 7, characterized in that: The pore sizes of the first geotextile and the second geotextile are 0.07 mm and 0.07 mm respectively; the pore sizes of the third geotextile and the fourth geotextile are 0.01 mm and 0.01 mm respectively.

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