Primary pretreatment device for construction engineering sewage

Abstract

The invention discloses a primary pretreatment device for constructional engineering sewage, and belongs to the technical field of sewage treatment.The primary pretreatment device comprises a pretreatment tank, an activated carbon filter element is slidably mounted in the pretreatment tank, and a water inlet pipe and a water outlet pipe are fixedly mounted on the side wall of the pretreatment tank; the water inlet pipe and the water outlet pipe are respectively mounted on the upper and lower sides of the activated carbon filter element; and the cleaning structure comprises a collecting plate, a collecting groove is formed in the collecting plate, the inner wall of the collecting groove is rotationally connected with a fixing shaft, the fixing shaft is fixedly sleeved with a cleaning scraper, and one end of the fixing shaft penetrates through the inner wall of the collecting plate and extends to the outer side of the collecting plate. Through rotation of the collecting plate, fallen precipitates are collected into the collecting tank and pushed into the inner side of the partition plate to be stored, and the situation that the precipitates leak out and cover activated carbon, consequently, the filtering speed of the activated carbon is decreased, and adverse effects on pretreatment are caused is avoided.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and in particular to a primary pretreatment device for wastewater from construction projects. Background Technology

[0002] During construction, a large amount of wastewater is generated. This wastewater contains harmful substances such as heavy metals, and direct discharge will seriously pollute the environment. Therefore, it is necessary to treat the wastewater before discharge. Generally, wastewater treatment is divided into several steps. First, the wastewater needs to be pre-treated to facilitate subsequent purification.

[0003] Existing pretreatment devices typically use high-performance activated carbon for filtration. However, these devices lack a structure for cleaning the activated carbon, causing sediments and other deposits in the wastewater to settle on the surface and cover the activated carbon, resulting in a decrease in filtration speed and affecting the pretreatment process. Furthermore, existing devices lack the ability to clean the inner wall of the pretreatment tank, which is detrimental to the long-term use of the pretreatment tank. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a primary pretreatment device for construction wastewater.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A primary pretreatment device for construction wastewater includes: A pretreatment tank, wherein an activated carbon filter element is slidably installed inside the pretreatment tank, and an inlet pipe and an outlet pipe are fixedly installed on the side wall of the pretreatment tank, respectively installed on the upper and lower sides of the activated carbon filter element. The cleaning structure includes a collection plate with a collection groove. A fixed shaft is rotatably connected to the inner wall of the collection groove. A cleaning scraper is fixedly sleeved on the fixed shaft. One end of the fixed shaft passes through the inner wall of the collection plate and extends to the outer side of the collection plate. A fixed gear is fixedly connected to the outer end of the fixed shaft. A fixed rack that meshes with the fixed gear is fixedly connected to the inner wall of the pretreatment tank. A power structure is installed inside the pretreatment tank.

[0006] Preferably, the power structure includes a motor fixedly connected to the lower inner wall of the pretreatment tank, a first reciprocating lead screw fixedly connected to the output end of the motor, the first reciprocating lead screw passing through the activated carbon filter element and extending above the activated carbon filter element, a lead screw sleeve mechanically matched on the first reciprocating lead screw, a pushing block fixedly installed at the top end of the lead screw sleeve, the pushing block being fixedly connected to the activated carbon filter element, a fixing ring slidably sleeved on the first reciprocating lead screw, and the fixing ring being fixedly connected to the activated carbon filter element, an mounting block fixedly connected to the side wall of the fixing ring, and the mounting block being fixedly connected to the side wall of the collection plate.

[0007] Preferably, a stirring rod is fixedly installed on the side wall of the portion of the first reciprocating screw above the activated carbon filter element, a sealing gasket is fixedly installed at the connection between the first reciprocating screw and the activated carbon filter element, a filter hole is opened on the inner wall of the collection tank, and a baffle plate is fixedly connected to the side wall of the collection plate, the baffle plate blocking the fixed gear and the fixed rack.

[0008] Preferably, a protective shell is installed on the outside of the motor to cover it, the protective shell is fixedly connected to the pretreatment tank, a fixing bolt is rotatably installed on the mounting block, and the mounting block is fixedly connected to the collection plate by the fixing bolt.

[0009] Preferably, a scraping structure is installed on the collecting plate, the scraping structure including a fixed scraper rotatably connected to the top of the collecting plate, a threaded rod fixedly connected to the top of the fixed scraper, a threaded sleeve threaded onto the outer side of the threaded rod, a connecting plate fixedly connected to the top of the threaded sleeve, an annular plate rotatably connected to the inner wall of the pretreatment tank, the connecting plate being fixedly connected to the annular plate, and a protective spring fixedly connected between the top of the threaded rod and the inner wall of the threaded sleeve.

[0010] Preferably, a partition plate is fixedly connected to the inner wall of the collecting plate, a push plate is slidably connected between the upper and lower inner walls of the collecting plate, and the push plate extends to the outside of the partition plate. A second reciprocating screw is rotatably connected between the inner walls of the collecting plate. The second reciprocating screw is connected to the fixed shaft through a belt drive assembly. The second reciprocating screw passes through the push plate and mechanically cooperates with the push plate. The position of the reciprocating spiral groove on the second reciprocating screw corresponds to the partition plate. A rubber protective layer is fixedly installed on the outer side of both the push plate and the partition plate.

[0011] Preferably, the lower inner wall of the collection tank has an inclined surface, the side of the cleaning scraper extends to the outside of the collection tank, and the bottom end of the collection plate is attached to the top of the activated carbon filter element.

[0012] Preferably, both the inlet pipe and the outlet pipe are rotatably equipped with regulating valves.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: by rotating the collecting plate, the falling sediment is collected into the collecting tank and pushed into the inner side of the partition plate for storage, preventing the sediment from leaking out and covering the activated carbon, which would reduce the filtration speed of the activated carbon and have an adverse effect on the pretreatment. At the same time, the inner wall of the pretreatment tank is cleaned by the fixed scraper, and the fixed scraper can swing back and forth during the cleaning process, which further improves the cleaning effect and is beneficial to the use of the pretreatment tank. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of a primary pretreatment device for construction wastewater proposed in this invention. Figure 2 This is a three-dimensional structural diagram of the collection plate of a primary pretreatment device for construction wastewater proposed in this invention. Figure 3 This is a three-dimensional structural diagram of the cleaning structure of a primary pretreatment device for construction wastewater proposed in this invention. Figure 4 This is a three-dimensional structural diagram of the scraping structure of a primary pretreatment device for construction wastewater proposed in this invention.

[0015] In the diagram: 1 Pretreatment tank, 2 Activated carbon filter element, 3 Motor, 4 First reciprocating lead screw, 5 Lead screw sleeve, 6 Fixing ring, 7 Cleaning structure, 71 Collection plate, 72 Collection trough, 73 Dividing plate, 74 Fixing shaft, 75 Cleaning scraper, 76 Fixing gear, 77 Fixing rack, 78 Second reciprocating lead screw, 79 Belt drive assembly, 710 Push plate, 711 Baffle plate, 8 Scraping structure, 81 Fixing scraper, 82 Threaded rod, 83 Threaded sleeve, 84 Connecting plate, 85 Annular plate. Detailed Implementation

[0016] Reference Figures 1-4 A primary pretreatment device for construction wastewater, comprising: Pretreatment tank 1, with activated carbon filter element 2 slidably installed inside the pretreatment tank 1. Inlet pipe and outlet pipe are fixedly installed on the side wall of the pretreatment tank 1. The inlet pipe and outlet pipe are respectively installed on the upper and lower sides of the activated carbon filter element 2. Wastewater enters the pretreatment tank 1 from the inlet pipe, and after being filtered by the activated carbon filter element 2, it is discharged from the outlet pipe. The cleaning structure 7 includes a collection plate 71 with a collection groove 72. The collection plate 71 rotates toward the opening of the collection groove 72. A fixed shaft 74 is rotatably connected to the inner wall of the collection groove 72. A cleaning scraper 75 is fixedly sleeved on the fixed shaft 74. One end of the fixed shaft 74 passes through the inner wall of the collection plate 71 and extends to the outer side of the collection plate 71. A fixed gear 76 is fixedly connected to the outer end of the fixed shaft 74. A fixed rack 77 that meshes with the fixed gear 76 is fixedly connected to the inner wall of the pretreatment tank 1. The fixed rack 77 is annular. A power structure is installed inside the pretreatment tank 1. Under the action of the power structure, the collecting plate 71 rotates. When the collecting plate 71 rotates, the sediment that falls on the activated carbon filter element 2 is scraped onto the inner side of the collecting tank 72 by its lower inner wall. At the same time, the rotation of the collecting plate 71 will cause the fixed shaft 74 to rotate together, which will drive the fixed gear 76 to rotate as well. Under the action of the fixed rack 77, the fixed gear 76 will rotate on its own during the rotation, which will drive the fixed shaft 74 to rotate as well. This will cause the cleaning scraper 75, which is fixedly sleeved on the fixed shaft 74, to rotate as well. The cleaning scraper 75 will scrape the sediment that has entered the collecting tank 72 toward the inner side of the collecting tank 72. The power structure includes a motor 3 fixedly connected to the lower inner wall of the pretreatment tank 1. The output end of the motor 3 is fixedly connected to a first reciprocating screw 4. The first reciprocating screw 4 passes through the activated carbon filter element 2 and extends to the top of the activated carbon filter element 2. A screw sleeve 5 is mechanically matched on the first reciprocating screw 4. A push block is fixedly installed at the top of the screw sleeve 5. The push block is annular and is fixedly connected to the activated carbon filter element 2. A fixing ring 6 is slidably sleeved on the first reciprocating screw 4 and is fixedly connected to the activated carbon filter element 2. An installation block is fixedly connected to the side wall of the fixing ring 6 and is fixedly connected to the side wall of the collection plate 71. After the motor 3 starts, its output end drives the first reciprocating screw 4 to rotate, causing the screw sleeve 5 that is mechanically matched with it to move up and down, driving the push block to move, and pushing the activated carbon filter element 2 to move up and down together. When the activated carbon filter element 2 moves up and down, it will squeeze the sewage, thereby accelerating the filtration of sewage. A stirring rod is fixedly installed on the side wall of the first reciprocating screw 4 above the activated carbon filter element 2. After the bactericide and other drugs are poured into the pretreatment tank 1, the stirring rod rotates together with the first reciprocating screw 4 to stir the sewage, so that the impurities in the sewage can be precipitated and settled. A sealing gasket is fixedly installed at the connection between the first reciprocating screw 4 and the activated carbon filter element 2. The inner wall of the collection tank 72 has filter holes. A baffle plate 711 is fixedly connected to the side wall of the collection plate 71. The baffle plate 711 covers the fixed gear 76 and the fixed rack 77, and the baffle plate 711 protects the fixed gear 76. The motor 3 is fitted with a protective shell that covers it. The protective shell is fixedly connected to the pretreatment tank 1 to prevent the motor 3 from coming into contact with water and causing damage to the motor 3. The mounting block is rotatably mounted with fixing bolts, and the mounting block is fixedly connected to the collection plate 71 through the fixing bolts, so that the collection plate 71 can be easily disassembled for maintenance and replacement. A scraping structure 8 is installed on the collection plate 71. The scraping structure 8 includes a fixed scraper 81 rotatably connected to the top of the collection plate 71. The fixed scraper 81 is made of elastic rubber. A threaded rod 82 is fixedly connected to the top of the fixed scraper 81. A threaded sleeve 83 is threadedly sleeved on the outer side of the threaded rod 82. A connecting plate 84 is fixedly connected to the top of the threaded sleeve 83. An annular plate 85 is rotatably connected to the inner wall of the pretreatment tank 1. The connecting plate 84 is fixedly connected to the annular plate 85. A protective spring is fixedly connected between the top of the threaded rod 82 and the inner wall of the threaded sleeve 83. The protective spring has a buffering and lubricating effect to facilitate the movement between the threaded rod 82 and the threaded sleeve 83. The fixed scraper 81 rotates together with the collection plate 71 to scrape the inner wall of the pretreatment tank 1, removing the debris adhering to the inside of the pretreatment tank 1. At the same time, when the activated carbon filter element 2 moves up and down, the collection plate 71 moves up and down accordingly, pushing the fixed scraper 81 to move up and down as well. This causes the threaded rod 82, which is fixedly connected to the fixed scraper 81, to move up and down as well. Under the action of the threaded sleeve 83, the threaded rod 82 will rotate when it moves up and down, causing the threaded rod 82 to swing back and forth, which in turn drives the fixed scraper 81 to swing back and forth as well, improving its cleaning effect on the inner wall of the pretreatment tank 1. A partition plate 73 is fixedly connected to the inner wall of the collecting plate 71. A push plate 710 is slidably connected between the upper and lower inner walls of the collecting plate 71, and the push plate 710 extends to the outside of the partition plate 73. A second reciprocating screw 78 is rotatably connected between the inner walls of the collecting plate 71. The second reciprocating screw 78 is connected to the fixed shaft 74 through a belt drive assembly 79. The second reciprocating screw 78 passes through the push plate 710 and is mechanically engaged with the push plate 710. The position of the reciprocating spiral groove on the second reciprocating screw 78 corresponds to the partition plate 73, that is, the push plate 710 can move between the partition plates 73. A rubber protective layer is fixedly installed on the outer side of both the push plate 710 and the partition plate 73 to protect the push plate 710 and the partition plate 73. Under the action of the belt drive assembly 79, when the fixed shaft 74 rotates, it will drive the second reciprocating screw 78 to rotate together. Since the push plate 710 cannot rotate, the rotation of the second reciprocating screw 78 will cause the push plate 710 to move back and forth, thereby pushing the sediment that has entered the collection tank 72 toward the inside of the partition plate 73, so that it moves to the inside of the partition plate 73. While preventing the sediment from leaking out, it can also leave enough space so that subsequent sediment can easily enter the collection tank 72. The lower inner wall of the collection tank 72 has a sloping surface. The side of the cleaning scraper 75 extends to the outer side of the collection tank 72, and the bottom end of the collection plate 71 is in contact with the top of the activated carbon filter element 2. The sloping surface facilitates the lower inner wall of the collection tank 72 to scrape the sediment at the top of the activated carbon filter element 2 into the collection tank 72, while the cleaning scraper 75 can scrape the sediment at the opening of the collection tank 72 into the inner side of the collection tank 72 to prevent it from leaking out. A regulating valve is rotatably installed on both the inlet pipe and the outlet pipe. The regulating valve is used to adjust the opening of the inlet pipe and the outlet pipe.

[0017] In this invention, when the device is in use, wastewater is introduced into the pretreatment tank 1 through the inlet pipe, and the motor 3 is started simultaneously. After the motor 3 starts, its output end drives the first reciprocating screw 4 to rotate, causing the screw sleeve 5, which is mechanically coupled with it, to move up and down, driving the push block to move, and pushing the activated carbon filter element 2 to move up and down together. When the activated carbon filter element 2 moves up and down, it squeezes the wastewater, thereby accelerating the filtration of wastewater. When the first reciprocating screw 4 rotates, the fixing ring 6, which is slidably sleeved on its outer side, also rotates, driving the mounting block and the collection plate 71 to rotate. As the collection plate 71 rotates... At the same time, the inner wall of the collection plate 71 scrapes the sediment that falls onto the activated carbon filter element 2 onto the inner side of the collection tank 72. Simultaneously, the rotation of the collection plate 71 causes the fixed shaft 74 to rotate, which in turn drives the fixed gear 76 to rotate. Under the action of the fixed rack 77, the fixed gear 76 rotates on its own axis, causing the fixed shaft 74 to rotate as well. This causes the cleaning scraper 75, which is fixedly sleeved on the fixed shaft 74, to rotate as well. The cleaning scraper 75 scrapes the sediment that has entered the collection tank 72 towards the inner side of the collection tank 72. Furthermore, as the collection plate 71 rotates... When in motion, the inner wall of the collection plate 71 scrapes the sediment that falls onto the activated carbon filter element 2 onto the inner side of the collection tank 72. Simultaneously, the rotation of the collection plate 71 causes the fixed shaft 74 to rotate, which in turn drives the fixed gear 76 to rotate. Under the action of the fixed rack 77, the fixed gear 76 rotates on its own axis, causing the fixed shaft 74 to rotate as well. This causes the cleaning scraper 75, which is fixedly sleeved on the fixed shaft 74, to rotate as well. The cleaning scraper 75 scrapes the sediment that has entered the collection tank 72 towards the inner side of the collection tank 72. In addition, the fixed scraper 81 moves along with the collection plate 71... The two components rotate together to scrape the inner wall of the pretreatment tank 1, removing the debris adhering to the inside of the pretreatment tank 1. At the same time, as the activated carbon filter element 2 moves up and down, the collecting plate 71 moves up and down accordingly, pushing the fixed scraper 81 to move up and down as well. This causes the threaded rod 82, which is fixedly connected to the fixed scraper 81, to move up and down as well. Under the action of the threaded sleeve 83, the threaded rod 82 rotates as it moves up and down, causing the threaded rod 82 to swing back and forth, which in turn causes the fixed scraper 81 to swing back and forth as well, improving its cleaning effect on the inner wall of the pretreatment tank 1.

Claims

1. A primary pretreatment device for construction wastewater, characterized in that, include: A pretreatment tank (1) is provided with an activated carbon filter element (2) that is slidably installed inside the pretreatment tank (1). An inlet pipe and an outlet pipe are fixedly installed on the side wall of the pretreatment tank (1). The inlet pipe and the outlet pipe are respectively installed on the upper and lower sides of the activated carbon filter element (2). The cleaning structure (7) includes a collection plate (71), a collection groove (72) is opened on the collection plate (71), a fixed shaft (74) is rotatably connected to the inner wall of the collection groove (72), a cleaning scraper (75) is fixedly sleeved on the fixed shaft (74), one end of the fixed shaft (74) penetrates the inner wall of the collection plate (71) and extends to the outer side of the collection plate (71), a fixed gear (76) is fixedly connected to the end of the fixed shaft (74) located on the outer side of the collection plate (71), a fixed rack (77) that meshes with the fixed gear (76) is fixedly connected to the inner wall of the pretreatment tank (1), and a power structure is installed inside the pretreatment tank (1).

2. The primary pretreatment device for construction wastewater according to claim 1, characterized in that, The power structure includes a motor (3) fixedly connected to the inner wall of the pretreatment tank (1). The output end of the motor (3) is fixedly connected to a first reciprocating screw (4). The first reciprocating screw (4) passes through the activated carbon filter element (2) and extends to the top of the activated carbon filter element (2). A screw sleeve (5) is mechanically matched on the first reciprocating screw (4). A push block is fixedly installed at the top of the screw sleeve (5). The push block is fixedly connected to the activated carbon filter element (2). A fixing ring (6) is slidably sleeved on the first reciprocating screw (4). The fixing ring (6) is fixedly connected to the activated carbon filter element (2). An installation block is fixedly connected to the side wall of the fixing ring (6). The installation block is fixedly connected to the side wall of the collection plate (71).

3. The primary pretreatment device for construction wastewater according to claim 2, characterized in that, A stirring rod is fixedly installed on the side wall of the first reciprocating screw (4) above the activated carbon filter element (2). A sealing gasket is fixedly installed at the connection between the first reciprocating screw (4) and the activated carbon filter element (2). A filter hole is opened on the inner wall of the collection tank (72). A baffle plate (711) is fixedly connected to the side wall of the collection plate (71). The baffle plate (711) covers the fixed gear (76) and the fixed rack (77).

4. The primary pretreatment device for construction wastewater according to claim 2, characterized in that, The motor (3) is fitted with a protective shell that covers it. The protective shell is fixedly connected to the pretreatment tank (1). A fixing bolt is rotatably installed on the mounting block, and the mounting block is fixedly connected to the collection plate (71) by the fixing bolt.

5. The primary pretreatment device for construction wastewater according to claim 1, characterized in that, A scraping structure (8) is installed on the collecting plate (71). The scraping structure (8) includes a fixed scraper (81) rotatably connected to the top of the collecting plate (71). A threaded rod (82) is fixedly connected to the top of the fixed scraper (81). A threaded sleeve (83) is threaded onto the outer side of the threaded rod (82). A connecting plate (84) is fixedly connected to the top of the threaded sleeve (83). An annular plate (85) is rotatably connected to the inner wall of the pretreatment tank (1). The connecting plate (84) is fixedly connected to the annular plate (85). A protective spring is fixedly connected between the top of the threaded rod (82) and the inner wall of the threaded sleeve (83).

6. The primary pretreatment device for construction wastewater according to claim 1, characterized in that, A partition plate (73) is fixedly connected to the inner wall of the collecting plate (71). A push plate (710) is slidably connected between the upper and lower inner walls of the collecting plate (71), and the push plate (710) extends to the outside of the partition plate (73). A second reciprocating screw (78) is rotatably connected between the inner walls of the collecting plate (71). The second reciprocating screw (78) is connected to the fixed shaft (74) by a belt drive assembly (79). The second reciprocating screw (78) passes through the push plate (710) and is mechanically engaged with the push plate (710). The position of the reciprocating spiral groove on the second reciprocating screw (78) corresponds to the partition plate (73). A rubber protective layer is fixedly installed on the outer side of both the push plate (710) and the partition plate (73).

7. The primary pretreatment device for construction wastewater according to claim 1, characterized in that, The lower inner wall of the collection tank (72) has an inclined surface, the side of the cleaning scraper (75) extends to the outside of the collection tank (72), and the bottom end of the collection plate (71) is attached to the top end of the activated carbon filter element (2).

8. The primary pretreatment device for construction wastewater according to claim 1, characterized in that, Both the inlet and outlet pipes are equipped with regulating valves.

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