A sand and gravel separation and conveying device suitable for the front end of sewage treatment.

Abstract

This invention provides a sand and gravel separation and conveying device suitable for the front end of sewage treatment, belonging to the technical field of sewage treatment equipment. The device includes a horizontal section and a climbing section, on which a mesh chain is laid. The mesh aperture of the mesh chain is adjusted by changing the mesh. The outlet of the drainage ditch is perpendicular to the transmission direction of the mesh chain. A baffle is installed at the edge of the mesh chain facing the outlet of the drainage ditch. Supports are evenly arranged at the bottom of the horizontal section, and the supports at the bottom of the climbing section are supported by support columns. A downward washing device is installed between the upper and lower layers of the mesh chain. When sewage enters the device, large sand and gravel particles are intercepted on the conveyor belt by the mesh chain, while the sewage falls through the gaps in the chain into a sewage collection tank at the bottom of the mesh chain. The sand and gravel are then conveyed to the collection device at the end for recycling. This device uses a mesh chain conveyor for sand and gravel separation, which has higher separation efficiency and stronger adaptability compared to traditional bar screens or sieves.

Description

Technical Field

[0001] This utility model relates to the field of sewage treatment equipment technology, and in particular to a sand and gravel separation and conveying device suitable for the front end of sewage treatment. Background Technology

[0002] In the wastewater treatment process generated during bulk cargo transshipment at ports, the wastewater often contains a large amount of large particles of sand, gravel, and other impurities. If these impurities enter subsequent treatment units directly without treatment, they will cause severe mechanical wear and blockages to key equipment such as pumps, agitators, and sludge scrapers, not only affecting treatment efficiency but also significantly increasing maintenance costs. Therefore, it is particularly important to install an effective sand and gravel separation device at the front end of wastewater treatment. However, traditional wastewater treatment front-ends often use simple filtration with bar screens or sieves, which suffer from low filtration efficiency, easy clogging, easy wear, and high maintenance costs due to reliance on manual and mechanical cleaning.

[0003] To address the aforementioned issues, this invention presents a novel front-end sand and gravel separation and conveying device for wastewater treatment. This device utilizes a mesh chain conveying system to achieve efficient separation and continuous conveying of large sand and gravel particles in wastewater, effectively preventing damage to subsequent wastewater treatment equipment caused by the sand and gravel. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a sand and gravel separation and conveying device suitable for the front end of sewage treatment.

[0005] The device includes a horizontal section and a climbing section, on which a mesh chain is laid;

[0006] The upper part of one side of the horizontal section is a drainage ditch, and a baffle is installed on the other side of the horizontal section opposite to the drainage ditch.

[0007] The bottom of the horizontal section and the climbing section are evenly arranged with brackets, and the bottom of the climbing section is supported on the brackets by columns.

[0008] A collection device is installed at the end of the climbing section.

[0009] Below the horizontal and ascending sections is a sewage collection tank.

[0010] The angle between the climbing section and the horizontal plane is 0~25°.

[0011] The mesh chain has two chains on both sides that can mesh with gears. The two chains are connected to the middle chain mesh by a connecting rod. The chain mesh is a mesh structure formed by interlocking chains connected by connecting rods. A cleaning device is installed between the upper and lower layers of the mesh chain, and the cleaning device sprays water downwards.

[0012] The width of the baffle is 100mm greater than the width of the drainage ditch, and the height of the baffle is not less than 100mm.

[0013] The spacing between the brackets shall not exceed 3 meters, and brackets must be installed at the location of the drainage ditch. The operating speed of the mesh chain is controlled by a control system.

[0014] The mesh chain controls the particle size sieving by changing the mesh with different aperture sizes.

[0015] The cleaning device is a high-pressure water nozzle.

[0016] The mesh chain is made of high-strength, corrosion-resistant materials, and the screen mesh size is adjustable, ensuring that it can effectively intercept sand and gravel while avoiding blockage by small impurities.

[0017] The entire device can be integrated with an intelligent control system to monitor parameters such as screening efficiency, conveying speed, and remaining space in the collection device, enabling remote monitoring and fault early warning, and improving operational convenience and system stability.

[0018] The beneficial effects of the above-mentioned technical solution of this utility model are as follows:

[0019] In the above solution, a mesh chain conveyor is used for sand and gravel separation, which offers higher separation efficiency and greater adaptability compared to traditional bar screens or sieves. It effectively prevents sand and gravel from damaging subsequent processing equipment such as slurry pumps, mixers, and sludge scrapers, extending equipment lifespan. The mesh chain design reduces clogging, lowering maintenance frequency and labor costs. The device integrates intelligent control, enabling remote monitoring and fault warnings, reducing the need for manual intervention and improving work efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the sand and gravel separation and conveying device applicable to the front end of sewage treatment according to the present invention;

[0021] Figure 2 for Figure 1 Schematic diagram of the AA section;

[0022] Figure 3 for Figure 1 Schematic diagram of the cross-section of BB.

[0023] Wherein: 1-Horizontal section; 2-Climbing section; 3-Drainage ditch; 4-Bracket; 5-Mesh chain; 6-Cleaning device; 7-Baffle. Detailed Implementation

[0024] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0025] This invention provides a sand and gravel separation and conveying device suitable for the front end of sewage treatment.

[0026] like Figure 1 As shown, the device includes a horizontal section 1 and a climbing section 2, both of which are covered with mesh chains 5.

[0027] The upper part of one side of the horizontal section 1 is a drainage ditch 3, and a baffle 7 is installed on the other side of the horizontal section 1 opposite to the drainage ditch 3, such as... Figure 2 As shown;

[0028] The bottom of the horizontal section 1 and the climbing section 2 are evenly arranged with brackets 4, and the bottom of the climbing section is supported on the brackets by columns.

[0029] A collection device is installed at the end of the climbing section 2.

[0030] Below the horizontal and ascending sections is a sewage collection tank.

[0031] like Figure 2 and Figure 3 The mesh chain 5 has two chains on both sides that can mesh with gears. The two chains are connected to the middle chain mesh by a connecting rod. The chain mesh is a mesh structure formed by interlocking chains connected by connecting rods. A cleaning device 6 is installed between the upper and lower layers of the mesh chain, and the cleaning device sprays water downwards.

[0032] In the specific design, horizontal sections are laid according to the location of the drainage ditches on site. These horizontal sections are 100mm from the bottom of the ditch and use a 600mm wide mesh chain. The angle between the horizontal and ascending sections is 10°, and a collection device is installed at the end of the ascending section. A baffle is installed on one side of the mesh chain on the opposite side of each drainage ditch's horizontal section. The baffle ensures that the muddy and sandy water discharged from the drainage ditch cannot be washed out of the mesh chain. The lower parts of the horizontal and ascending sections are supported by brackets. As the ascending section gradually rises, its bottom is connected to the brackets by uprights. High-pressure water nozzles that spray downwards are installed inside the annular structure of the mesh chain to flush away fine mud clogging the chain mesh. Specifically, the high-pressure water nozzles are installed inside the starting end of the horizontal section, between the upper and lower layers of the mesh chain.

[0033] In practical applications, when sewage enters the mesh chain from the drainage ditch, large particles of sand and gravel are intercepted and collected on the conveyor belt, while the sewage falls into the sewage collection tank through the gaps in the chain. An automatic high-pressure cleaning device washes away the sludge from the mesh and surface of the lower mesh chain, ensuring that the mesh of the returning upper mesh chain remains unobstructed. The sand and gravel on the upper mesh chain conveyor belt are then transported to the collection device at the end for recycling.

[0034] The end of the device is equipped with a sand and gravel collection box or an automatic unloading device to collect and temporarily store the separated sand and gravel. The collection system can be equipped with a cleaning mechanism as needed to periodically or automatically clean the sand and gravel in the collection box to keep the system unobstructed.

[0035] This device uses an innovative mesh-chain automatic conveyor to pre-screen and efficiently separate large particles of sand and gravel in wastewater, thereby protecting downstream treatment equipment such as slurry pumps, agitators, and sludge scrapers from malfunctions caused by sand and gravel blockage and wear, and improving the overall operating efficiency and stability of the wastewater treatment system.

[0036] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A sand and gravel separation and conveying device suitable for the front end of sewage treatment, characterized in that, It includes a horizontal section and a climbing section, on which a mesh chain is laid; The upper part of one side of the horizontal section is a drainage ditch, and a baffle is installed on the other side of the horizontal section opposite to the drainage ditch. The bottom of the horizontal and climbing sections are evenly distributed with brackets, and the bottom of the climbing section is supported on the brackets by columns; a collection device is installed at the end of the climbing section. Below the horizontal and ascending sections is a sewage collection tank.

2. The sand and gravel separation and conveying device for the front end of sewage treatment according to claim 1, characterized in that: The angle between the climbing section and the horizontal plane is 0~25°.

3. The sand and gravel separation and conveying device for the front end of sewage treatment according to claim 1, characterized in that: The mesh chain has two chains on both sides that can mesh with gears. The two chains are connected to the middle chain mesh by a connecting rod. The chain mesh is a mesh structure formed by interlocking chains connected by connecting rods. A cleaning device is installed between the upper and lower layers of the mesh chain, and the cleaning device sprays water downwards.

4. The sand and gravel separation and conveying device for the front end of sewage treatment according to claim 1, characterized in that: The width of the baffle is 100mm greater than the width of the drainage ditch, and the height of the baffle is not less than 100mm.

5. The sand and gravel separation and conveying device for the front end of sewage treatment according to claim 1, characterized in that: The spacing between the brackets shall not exceed 3 meters, and brackets must be installed at the location of the drainage ditch.

6. The sand and gravel separation and conveying device for the front end of sewage treatment according to claim 3, characterized in that: The mesh chain operates at a speed controlled by a control system.

7. The sand and gravel separation and conveying device for the front end of sewage treatment according to claim 3, characterized in that: The mesh chain can be used to control the particle size of the mesh chain by changing the chain with different aperture sizes.

8. The sand and gravel separation and conveying device for the front end of sewage treatment according to claim 3, characterized in that: The cleaning device is a high-pressure water nozzle.

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