A construction site wastewater treatment device

Abstract

The application discloses a construction site sewage treatment device and belongs to the technical field of sewage treatment, which comprises a first side upper portion of a cleaning box, a total water inlet communicated with the first side upper portion, a second side opposite to the first side, a slag outlet arranged on the second side, a filter belt in the shape of a ring and provided with filter holes, a bearing section located on an upper layer of the filter belt and a return section located on a lower layer of the filter belt, a lower end of the bearing section located below the total water inlet, a higher end of the bearing section at least partially extended into the slag outlet, a cleaning mechanism arranged in a sandwich layer between the bearing section and the return section of the filter belt, used for dredging the filter holes, and a flushing mechanism used for spraying cleaning water to a lower surface of the return section. The cleaning mechanism is arranged to reciprocatingly scrape and clean the bearing section of the filter belt, the blocked filter holes can be continuously dredged without stopping the sewage treatment process, the manpower input and the number of equipment downtime are significantly reduced, and the continuity and stability of the sewage treatment are ensured.

Description

Technical Field

[0001] This invention belongs to the field of wastewater treatment technology, and more specifically, relates to a wastewater treatment device for construction sites. Background Technology

[0002] During construction, wastewater often contains a large number of stones generated during construction. When pumping and collecting wastewater, it is necessary to filter out larger stones for subsequent treatment. Currently, filter plates are usually installed in wastewater treatment equipment to separate stones. However, conventional wastewater treatment equipment requires frequent cleaning of the filter plates to reduce the probability of clogging. This cleaning process not only requires a large amount of manpower but also increases the number and duration of equipment downtime due to frequent cleaning, resulting in a reduction in wastewater treatment capacity and ultimately affecting the overall treatment efficiency. Summary of the Invention

[0003] To solve the above problems, the present invention adopts the following technical solution: A construction site wastewater treatment device, comprising: The cleaning box has a main water inlet connected to the upper part of the first side, a slag outlet opened at the upper part of the second side opposite to the first side, and a main water outlet connected to the lower part. A filter screen is provided at the main water outlet. An inclined filter belt, which is an annular belt with filter holes, is rotatably mounted in the cleaning box via a first rotating roller and a second rotating roller. The first rotating roller or the second rotating roller is driven by a first motor. The filter belt has a carrying section in the upper layer and a return section in the lower layer. The height of the carrying section gradually increases from the side of the main water inlet to the side of the slag outlet. The lower end of the carrying section is located below the main water inlet, and the higher end of the carrying section extends at least partially into the slag outlet. A cleaning mechanism is provided in the interlayer space between the carrying section and the return section of the filter belt, and is used to reciprocate to scrape and clean the carrying section of the filter belt from the inside to unclog the filter holes. A rinsing mechanism is provided outside the cleaning tank and is linked with the cleaning mechanism. The spray pipe of the rinsing mechanism is fixed inside the cleaning tank and located below the return section, and is used to spray cleaning water onto the lower surface of the return section.

[0004] Furthermore, the filter belt is provided with anti-slip texture.

[0005] Furthermore, a sludge scraping port for scraping out mud from inside the cleaning box is provided at the bottom of the side of the cleaning box. The sludge scraping port is located below the main water outlet, and a sealing cover is detachably connected to the sludge scraping port.

[0006] Furthermore, the cleaning mechanism includes: The second motor is fixedly installed on the outer wall of the cleaning box; A cleaning shaft is rotatably disposed between the carrying section and the return section of the filter belt. The axial direction of the cleaning shaft is parallel to the width direction of the filter belt. One end of the cleaning shaft passes through the side wall of the cleaning box and is connected to the output end of the second motor. The other end is rotatably connected to the other side wall of the cleaning box. A cleaning brush is fixedly installed on the cleaning shaft, and the bristles of the cleaning brush are in contact with the inner surface of the bearing section. The second motor drives the cleaning shaft to rotate reciprocally, causing the cleaning brush to scrape the inner surface of the bearing section reciprocally.

[0007] Furthermore, the piston pump assembly is fixed on the outer wall of the cleaning tank, and the input end of the piston pump assembly is driven to the cleaning shaft, which drives it to suck in and discharge cleaning water by the reciprocating rotation of the cleaning shaft; The water inlet pipe has one end connected to the water inlet of the piston pump assembly, and the other end extends into the cleaning tank and is located below the liquid level in the cleaning tank. A first one-way valve is provided on the water inlet pipe to restrict the cleaning water from flowing into the piston pump assembly in one direction. The water outlet pipe has one end connected to the water outlet of the piston pump assembly and the other end connected to the spray pipe. A second one-way valve is provided on the water outlet pipe to restrict the cleaning water from flowing out of the piston pump assembly in one direction. The spray pipe is arranged below the return section along the width direction of the filter belt, and the spray pipe has a plurality of spray holes, with the spray direction of each spray hole facing the lower surface of the return section.

[0008] Furthermore, the piston pump assembly includes: Two piston cylinders are arranged side by side and both are fixed to the outer wall of the cleaning box; Two racks are fixedly connected to the upper ends of the piston rods of the two piston cylinders, respectively. A gear, which is fixed on a transmission shaft that rotates synchronously with the cleaning shaft, and the gear meshes with two racks simultaneously; The two racks are located on the radial sides of the gear. When the cleaning shaft reciprocates, the two racks rise and fall alternately, so that the two piston cylinders alternately complete the water intake and discharge.

[0009] Furthermore, a first synchronous pulley is fixedly installed at the through end of the cleaning shaft, and a drive shaft is rotatably provided on the outer wall of the cleaning box. A second synchronous pulley and the gear are fixedly installed on the drive shaft, and the first synchronous pulley and the second synchronous pulley are connected by a synchronous belt drive.

[0010] Furthermore, it also includes a controller and a liquid level sensor. The liquid level sensor is located inside the cleaning tank and on the side closer to the higher part of the filter belt. The liquid level sensor is located 5-10mm above the water inlet pipe. The first motor, the second motor and the controller are all electrically connected. When the water level rises to the position of the liquid level sensor, the second motor is started. When the water level drops to the position of the liquid level sensor, the second motor is turned off.

[0011] The beneficial effects of this invention are: This invention uses a cleaning mechanism to repeatedly scrape and clean the carrying section of the filter belt, which can continuously unclog blocked filter holes without stopping the sewage treatment process, significantly reducing manpower input and equipment downtime, and ensuring the continuity and stability of sewage treatment.

[0012] The cleaning mechanism of this invention scrapes the bearing section from the inside of the filter belt, directly acting on the stones and debris clogging the filter holes. At the same time, the flushing mechanism sprays cleaning water from the outside towards the lower surface of the return section, performing bidirectional synergistic cleaning of the filter belt, further ensuring that the filter holes remain unobstructed, and enabling the filter belt to maintain good filtration efficiency for a long time.

[0013] The carrying section of the filter belt of this invention gradually rises from the water inlet side to the slag outlet side. The stones move along the filter belt and are transported upwards, and are eventually automatically discharged from the slag outlet. No additional slag conveying device is required. The structure is compact and the slag discharge is smooth. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a construction site wastewater treatment device according to the present invention; Figure 2 This is a partial schematic diagram of a construction site wastewater treatment device according to the present invention.

[0015] In the diagram: 1. Cleaning box; 2. Filter belt; 3. Filter holes; 4. First motor; 5. Slag outlet; 6. Main water inlet; 7. Sludge scraper; 8. Second motor; 9. Cleaning shaft; 10. Brush bristles; 11. Bearing section; 12. Return section; 13. Water inlet pipe; 14. Water outlet pipe; 15. Piston cylinder; 16. Rack; 17. Gear; 18. First check valve; 19. Second check valve; 20. Spray pipe. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0018] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0019] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0020] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0021] Example 1

[0022] refer to Figures 1 to 2 A construction site wastewater treatment device, comprising: Cleaning box 1, the upper part of the first side of the cleaning box 1 is connected to the main water inlet 6, the second side opposite to the first side is provided with the slag outlet 5, the lower part is connected to the main water outlet, and a filter screen is provided at the main water outlet; Preferably, the cleaning box 1 has an open or closed box structure at the top, the main inlet is used to introduce stone-containing sewage from the construction site, and the lower edge of the slag outlet 5 is matched with the higher end of the filter belt 2.

[0023] The filter belt 2 is inclined and is an annular belt with filter holes 3. The filter belt 2 is rotatably installed in the cleaning box 1 by a first rotating roller and a second rotating roller. The first rotating roller or the second rotating roller is driven by a first motor 4. The filter belt 2 has a carrying section 11 in the upper layer and a return section 12 in the lower layer. The height of the carrying section 11 gradually increases from the side of the main water inlet 6 to the side of the slag outlet 5. The lower end of the carrying section 11 is located below the main water inlet 6, and the higher end of the carrying section 11 extends at least partially into the slag outlet 5. Preferably, the filter belt 2 is made of wear-resistant rubber, and the tilt angle is 15° to 30°.

[0024] In practice, the lower end of the bearing section is located below the main inlet, so that the sewage discharged from the main inlet falls directly into the lower area of ​​the bearing section; the higher end of the bearing section extends into the slag outlet, where the stones are transported and then slide out of the slag outlet by gravity.

[0025] The cleaning mechanism is located in the interlayer space between the carrying section 11 and the return section 12 of the filter belt 2. It is used to reciprocate to scrape and clean the carrying section 11 of the filter belt 2 from the inside to clear the filter holes 3. The rinsing mechanism is located outside the cleaning box 1 and is linked with the cleaning mechanism. The spray pipe 20 of the rinsing mechanism is fixed inside the cleaning box 1 and located below the return section 12, and is used to spray cleaning water onto the lower surface of the return section 12.

[0026] Preferably, the first motor 4 is a servo motor.

[0027] In this embodiment, the filter belt 2 is provided with anti-slip texture, which is a raised wavy stripe or herringbone pattern with a height of 2 to 5 mm. It is used to increase the friction between the stone and the belt surface and prevent the stone from sliding down the inclined section.

[0028] In this embodiment, a scraper opening 7 for scraping mud from inside the cleaning box is provided at the bottom of the side of the cleaning box 1. The scraper opening 7 is located below the main water outlet, and a sealing cover is detachably connected to the scraper opening 7.

[0029] In this embodiment, after the device has been running for a period of time, fine mud and sand will accumulate at the bottom of the cleaning box, which can be discharged periodically by opening the sealing cover.

[0030] In this embodiment, the cleaning mechanism includes: The second motor 8 is fixedly installed on the outer wall of the cleaning box 1; The cleaning shaft 9 is rotatably disposed between the carrying section 11 and the return section 12 of the filter belt 2. The axial direction of the cleaning shaft 9 is parallel to the width direction of the filter belt 2. One end of the cleaning shaft 9 passes through the side wall of the cleaning box 1 and is connected to the output end of the second motor 8. The other end is rotatably connected to the other side wall of the cleaning box 1. A cleaning brush is fixedly disposed on the cleaning shaft 9. The bristles 10 of the cleaning brush are in contact with the inner surface of the carrying section 11. The second motor 8 drives the cleaning shaft 9 to rotate back and forth, causing the cleaning brush to scrape the inner surface of the bearing section 11 back and forth. The cleaning brush scrapes the inner surface of the bearing section back and forth, pushing or brushing the stones stuck in the filter holes upwards.

[0031] Preferably, the second motor 8 is a servo motor.

[0032] In practice, it also includes a controller, through which the start / stop, speed, and reciprocating frequency of the first and second motors can be set.

[0033] In this embodiment, a liquid level sensor is also included, which is installed inside the cleaning tank and located on the side close to the cleaning tank 1. The liquid level sensor is located 5-10mm above the water inlet pipe. The first motor, the second motor and the controller are electrically connected. When the water level rises to the position of the liquid level sensor, the second motor is turned on. When the water level drops to the position of the liquid level sensor, the second motor is turned off.

[0034] In this embodiment, the piston pump assembly is fixed on the outer wall of the cleaning box 1. The input end of the piston pump assembly is driven to the cleaning shaft 9, and the reciprocating rotation of the cleaning shaft 9 drives it to suck in and discharge cleaning water. The inlet pipe 13 has one end connected to the inlet of the piston pump assembly, and the other end extends into the cleaning tank 1 and is located below the liquid level in the cleaning tank 1. A first one-way valve 18 is provided on the inlet pipe 13 to restrict the cleaning water from flowing into the piston pump assembly in one direction. The water outlet pipe 14 has one end connected to the water outlet of the piston pump group and the other end connected to the spray pipe 20. A second one-way valve 19 is provided on the water outlet pipe 14 to restrict the cleaning water from flowing out of the piston pump group in one direction. The spray pipe 20 is arranged below the return section 12 along the width direction of the filter belt 2. Multiple spray holes are opened on the spray pipe 20, and the spray direction of each spray hole is towards the lower surface of the return section 12.

[0035] In practice, the part of the inlet pipe that extends into the cleaning tank is equipped with an anti-sludge cover. Due to the obstruction of the anti-sludge cover, the sludge deposited at the bottom will not be sucked up in large quantities. Only the suspended fine sand that has just fallen into the water and has not yet settled is sucked up, which is perfectly feasible for rinsing the filter.

[0036] In this embodiment, the piston pump assembly includes: Two piston cylinders 15 are arranged side by side and are both fixed to the outer wall of the cleaning box 1. Two racks 16 are fixedly connected to the upper ends of the piston rods of the two piston cylinders 15, respectively. Gear 17 is fixed on a transmission shaft that rotates synchronously with the cleaning shaft 9, and gear 17 meshes with two racks 16 at the same time. The two racks 16 are located on the radial sides of the gear 17 respectively. When the cleaning shaft 9 reciprocates, the two racks 16 rise and fall alternately, so that the two piston cylinders 15 alternately complete the water intake and water discharge.

[0037] In this embodiment, a first synchronous pulley is fixedly installed at the through end of the cleaning shaft 9, and a drive shaft is rotatably provided on the outer wall of the cleaning box 1. A second synchronous pulley and a gear 17 are fixedly installed on the drive shaft, and the first synchronous pulley and the second synchronous pulley are connected by a synchronous belt drive.

[0038] In practice, when the cleaning shaft reciprocates, the synchronous belt drives the transmission shaft and gears to reciprocate synchronously. When the gears rotate forward, the left rack rises and the right rack falls; when the gears rotate in reverse, the left rack falls and the right rack rises. The inlet and outlet ports of the two piston cylinders are connected to the inlet and outlet pipes, respectively, and each piston cylinder is equipped with a one-way valve on its inlet and outlet pipes. When the piston of a piston cylinder rises, the cylinder draws in water; when the piston falls, the cylinder drains water. Since the two racks move in opposite directions, the two piston cylinders alternately complete the water intake and drainage actions, thereby achieving continuous and stable water spraying.

[0039] Working process: The first motor starts, and filter belt 2 rotates counter-clockwise. Wastewater containing stones flows in from the main inlet and falls into the lower area of ​​the carrying section. The wastewater, carrying small particles of silt, passes through the filter holes and falls to the bottom of the cleaning tank. Stones are trapped on the upper surface of the carrying section and move upwards with the belt, eventually being discharged from the slag outlet. During this process, the second motor continuously drives the cleaning brush to swing back and forth, scraping the carrying section from the inside and clearing the clogged filter holes. Simultaneously, the reciprocating rotation of the cleaning shaft drives the piston pump unit to work, drawing out the water (the clearer portion after sedimentation) from the cleaning tank and pumping it into the spray pipe. The water is sprayed upwards from the spray holes to rinse the lower surface of the return section, further removing residual fine particles of silt.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of protection of the present invention.

Claims

1. A construction site wastewater treatment device, characterized in that, include: The cleaning box has a main water inlet connected to the upper part of the first side, a slag outlet opened at the upper part of the second side opposite to the first side, and a main water outlet connected to the lower part. A filter screen is provided at the main water outlet. An inclined filter belt, which is an annular belt with filter holes, is rotatably mounted in the cleaning box via a first rotating roller and a second rotating roller. The first rotating roller or the second rotating roller is driven by a first motor. The filter belt has a carrying section in the upper layer and a return section in the lower layer. The height of the carrying section gradually increases from the side of the main water inlet to the side of the slag outlet. The lower end of the carrying section is located below the main water inlet, and the higher end of the carrying section extends at least partially into the slag outlet. A cleaning mechanism is provided in the interlayer space between the carrying section and the return section of the filter belt, and is used to reciprocate to scrape and clean the carrying section of the filter belt from the inside to unclog the filter holes. A rinsing mechanism is provided outside the cleaning tank and is linked with the cleaning mechanism. The spray pipe of the rinsing mechanism is fixed inside the cleaning tank and located below the return section, and is used to spray cleaning water onto the lower surface of the return section.

2. The construction site wastewater treatment device according to claim 1, characterized in that, The filter belt is provided with anti-slip texture.

3. A construction site wastewater treatment device according to claim 1, characterized in that, The bottom side of the cleaning box is provided with a sludge scraping port for scraping out mud from inside the cleaning box. The sludge scraping port is located below the main water outlet and is detachably connected to a sealing cover.

4. A construction site wastewater treatment device according to claim 1, characterized in that, The cleaning mechanism includes: The second motor is fixedly installed on the outer wall of the cleaning box; A cleaning shaft is rotatably disposed between the carrying section and the return section of the filter belt. The axial direction of the cleaning shaft is parallel to the width direction of the filter belt. One end of the cleaning shaft passes through the side wall of the cleaning box and is connected to the output end of the second motor. The other end is rotatably connected to the other side wall of the cleaning box. A cleaning brush is fixedly installed on the cleaning shaft, and the bristles of the cleaning brush are in contact with the inner surface of the bearing section. The second motor drives the cleaning shaft to rotate reciprocally, causing the cleaning brush to scrape the inner surface of the bearing section reciprocally.

5. A construction site wastewater treatment device according to claim 4, characterized in that, The rinsing mechanism includes: A piston pump assembly is fixed on the outer wall of the cleaning tank. The input end of the piston pump assembly is driven to the cleaning shaft, and the reciprocating rotation of the cleaning shaft drives it to draw in and discharge cleaning water. The water inlet pipe has one end connected to the water inlet of the piston pump assembly, and the other end extends into the cleaning tank and is located below the liquid level in the cleaning tank. A first one-way valve is provided on the water inlet pipe to restrict the cleaning water from flowing into the piston pump assembly in one direction. The water outlet pipe has one end connected to the water outlet of the piston pump assembly and the other end connected to the spray pipe. A second one-way valve is provided on the water outlet pipe to restrict the cleaning water from flowing out of the piston pump assembly in one direction. The spray pipe is arranged below the return section along the width direction of the filter belt, and the spray pipe has a plurality of spray holes, with the spray direction of each spray hole facing the lower surface of the return section.

6. A construction site wastewater treatment device according to claim 5, characterized in that, The piston pump assembly includes: Two piston cylinders are arranged side by side and both are fixed to the outer wall of the cleaning box; Two racks are fixedly connected to the upper ends of the piston rods of the two piston cylinders, respectively. A gear, which is fixed on a transmission shaft that rotates synchronously with the cleaning shaft, and the gear meshes with two racks simultaneously; The two racks are located on the radial sides of the gear. When the cleaning shaft reciprocates, the two racks rise and fall alternately, so that the two piston cylinders alternately complete the water intake and discharge.

7. A construction site wastewater treatment device according to claim 6, characterized in that, A first synchronous pulley is fixedly installed at the through end of the cleaning shaft. A transmission shaft is rotatably provided on the outer wall of the cleaning box. A second synchronous pulley and the gear are fixedly installed on the transmission shaft. The first synchronous pulley and the second synchronous pulley are connected by a synchronous belt drive.

8. A construction site wastewater treatment device according to claim 7, characterized in that, It also includes a controller and a liquid level sensor. The liquid level sensor is located inside the cleaning tank and on the side with a higher height than the filter belt. The liquid level sensor is located 5-10 mm above the water inlet pipe. The first motor, the second motor and the controller are all electrically connected. When the water level rises to the position of the liquid level sensor, the second motor is started. When the water level drops to the position of the liquid level sensor, the second motor is turned off.

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