Resource-saving water-saving belt dewaterer

Abstract

The present application relates to a kind of resource conservation water-saving type belt dewaterer, including the conditioning tank for adding reagent at liquid sludge inlet, for the sludge that has been flocculated flat laying belt thickener.The present application relates to solid waste dewatering reduction and solid-liquid separation field, the present application relates to a kind of resource conservation water-saving type belt dewaterer, when using, the water volume of pressure filtration is statistically in real time by flowmeter, when the average water yield in unit time reduces, flowmeter gives signal, after conversion by plc controller, the opening and closing size of control valve is controlled, the water yield of nozzle is increased, without always maintaining high water pressure flushing, more water saving, the water in nozzle is pressurized, it is high pressure and is sprayed out, while water saving, it can play effective flushing effect, and after flushing, sewage is recycled and is filtered by filtering equipment, and is transported to water tank again, for recycling, while guaranteeing to reach cleaning effect, water use is reduced.

Description

Technical Field

[0001] This invention relates to the field of solid waste dewatering and volume reduction and solid-liquid separation technology, specifically to conventional pressure belt dewatering machines and high-pressure belt dewatering machines, and also includes a matching reagent conditioning tank and a belt concentrator. More specifically, it is a resource-saving, water-efficient belt dewatering system. Background Technology

[0002] Belt dewatering machines offer advantages such as large processing capacity, high dewatering efficiency, automatic continuous operation, and adjustable dewatering pressure based on the properties of sludge and other solid wastes and the moisture content of the filter cake. They are widely used in municipal sludge treatment and industrial sludge treatment in industries such as paper and pulp, metallurgy, tobacco, mineral processing, coal preparation, chemicals, and food. However, because the filter belt in a belt dewatering machine operates continuously and automatically, online cleaning of the filter belt is necessary to obtain a filter cake with a low moisture content. The online cleaning water consumption for belt dewatering machines on the market is 4–6 m³ / h·m width per filter belt, which is higher than other dewatering equipment. This significantly limits the application of belt dewatering machines, especially in locations with limited water resources, such as centralized sludge and other solid waste treatment plants and small treatment stations. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a resource-saving, water-saving belt dewatering machine, solving the aforementioned problems.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a resource-saving and water-saving belt dewatering machine, comprising a conditioning tank for adding chemicals at the liquid sludge inlet, a belt dewatering machine for spreading the flocculated sludge, a tensioning assembly for adjusting the filter cloth, a filter pressing assembly for pressing the sludge, a correction assembly for correcting the filter cloth's deviation, a rinsing assembly for rinsing the filter cloth, a drive assembly, and a filter cloth assembly. The correction assembly is located within the inner cavity of the belt thickener and includes a separation hood and a cleaning mechanism and a rinsing mechanism respectively disposed within the separation hood for cleaning the filter cloth. The rinsing mechanism further includes a flow meter disposed on the surface of the belt dewatering machine's outlet pipe. The rinsing mechanism includes a water tank fixed within the separation hood, with multiple nozzles connected to the bottom of the water tank. The control valves of the nozzles are electrically connected to the flow meter. A pressure box is fixedly connected to the surface of the water tank, and a cylinder is slidably connected to the inner cavity of the pressure box. The piston plate is driven by a cylinder. The pressure chamber has multiple one-way air inlets on its surface and multiple exhaust pipes connected to its bottom. These exhaust pipes are connected to the nozzles via T-junctions. During use, a flow meter monitors the water flow rate in real time. When the average water output per unit time decreases, it indicates severe filter cloth clogging. The flow meter then controls the valve to increase the water output from the nozzles to rinse the filter cloth, increasing the rinsing force. This eliminates the need for continuous high-pressure rinsing, saving water. Furthermore, the rinse water from the nozzles is recycled. Since impurities inevitably exist in the water, potentially causing blockage in the nozzle's internal cavity, a cylinder drives the piston plate to move up and down within the pressure chamber. Air is drawn in through the one-way air inlets, pressurized, and then sprayed into the nozzles through the exhaust pipes for high-pressure cleaning, expelling impurities. The system also pressurizes the water inside the nozzles during rinsing, resulting in high-pressure spraying, thus achieving effective rinsing while saving water.

[0005] As a further aspect of the present invention: the inner cavity of the separation hood is provided with a reversing roller for reversing the filter cloth, and the bottom of the separation hood is provided with an output port for outputting the filter cloth. The output port is surrounded by a baffle. By setting the baffle, the output port is blocked to prevent the rinsing water from leaking out. The rinsing water can be effectively recycled to prevent it from mixing with sewage and affecting subsequent reuse.

[0006] As a further aspect of the present invention: the bottom of the separation hood is connected to a recycling pipe, and a guide slope is provided at the bottom of the inner cavity of the separation hood. The lowest point of the guide slope is located on the side of the recycling pipe. The recycling pipe recycles the flushed wastewater, filters it through a filtration device, and then sends it back to the water tank for recycling.

[0007] As a further aspect of the present invention: the cleaning mechanism includes a slot on the right side of the separation hood. The inner cavity of the slot is rotatably connected to a rotating shaft driven by a motor and a squeezing roller for receiving the bottom of the filter cloth. The surface of the rotating shaft is circumferentially fixed with a plurality of scraper assemblies for scraping the filter cloth. The filter cloth is received by the squeezing roller, and then the rotating shaft rotates, causing the scraper assemblies to abut against one side of the filter cloth to clean its surface and scrape off the attached sludge.

[0008] As a further aspect of the present invention: the scraper assembly includes a fixed plate fixed to the surface of the rotating shaft. A scraper is slidably connected to one side of the fixed plate, and a return spring is fixedly connected to one side of the fixed plate. One end of the return spring is fixedly connected to one side of the scraper. During use, one side of the scraper abuts against the surface of the filter cloth to clean the dirt on its surface. And through the push of the return spring, when the end of the scraper is worn, it can continue to extend and abut against the surface of the filter cloth under the elastic force, maintaining a continuous cleaning effect. And when one scraper is worn, by rotating the rotating shaft, the next scraper is rotated 60 degrees to abut against the surface of the filter cloth, alternating between the two scrapers. It is not necessary to replace one scraper immediately after it is worn, thus extending the processing time.

[0009] As a further aspect of the present invention: one side of the scraper is provided with an inclined surface. By setting the cut surface at an incline, it does not directly contact the filter cloth. The gradually inclined surface increases the contact area, which can prevent tearing and damage to the surface of the filter cloth.

[0010] As a further aspect of the present invention: the belt dehydrator is provided with an SS304 stainless steel enclosed protective door on the outside.

[0011] As a further aspect of the present invention: the dewatering components within the belt dewatering machine include a concentration section, a low-pressure filtration section, a medium-pressure filtration section, and a high-pressure filtration section, totaling three filter belts. Three rinsing components are provided, each positioned on either the front or back of one of the three filter belts. The three rinsing components are guided by rollers and positioned with their bottoms facing upwards, rinsing the three filter cloths from top to bottom to ensure cleanliness.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] This invention uses a flow meter to monitor the water flow during filter pressing in real time. When the average water output per unit time decreases, it indicates severe filter cloth blockage. The flow meter sends a signal, which is converted by a PLC controller to control the opening and closing of the valve. When the water output is below a preset threshold, the valve opening is increased until the threshold is reached, then it stops. When the water output is above the preset threshold, the valve opening is decreased until the threshold is reached, then it stops. This increases the water output from the nozzles to rinse the filter cloth, increasing the rinsing force. It eliminates the need to maintain high water pressure continuously, thus saving water. Furthermore, the rinsing water from the nozzles is recycled. Since impurities inevitably exist in the water, which can easily cause blockage in the nozzle cavity, a cylinder drives a piston plate to move up and down in the pressure chamber. Air is drawn in through a one-way air inlet, pressurized, and then sprayed into the nozzle through the exhaust pipe for high-pressure cleaning, expelling impurities. During rinsing, the water inside the nozzle can be pressurized and sprayed out at high pressure, achieving effective rinsing while saving water.

[0014] In this invention, one side of the scraper abuts against the surface of the filter cloth during use to clean the dirt on its surface. And through the push of the return spring, when the end of the scraper is worn, it can continue to extend and abut against the surface of the filter cloth under the elastic force, maintaining a continuous cleaning effect. And when one scraper is worn, the rotating shaft drives the next scraper to rotate 60 degrees and abut against the surface of the filter cloth, alternating between the two. It is not necessary to replace it immediately after it is worn, thus extending the processing time.

[0015] In this invention, the lowest point of the guide slope is located on the side of the recycling pipe. The recycling pipe recycles the flushed wastewater, filters it through a filtration device, and then sends it back to the water tank for reuse. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 For the present invention Figure 1 A magnified view of a portion of point A in the middle.

[0018] Figure 3 For the present invention Figure 1 A magnified view of a section at point B in the middle.

[0019] In the diagram: 1. Conditioning tank; 2. Belt dewatering machine; 3. Separation hood; 4. Empty tank; 5. Squeeze roller; 6. Rotating shaft; 7. Fixed plate; 8. Return spring; 9. Scraper; 10. Water tank; 11. Pressure box; 12. Cylinder; 13. Piston plate; 14. T-shaped pipe; 15. Exhaust pipe; 16. Nozzle; 17. Reversing roller; 18. Output port; 20. Recovery pipe; 21. Guide slope; 22. Baffle; 23. Flow meter. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0021] Please see Figure 1-3 This invention provides a technical solution: a resource-saving and water-saving belt dewatering machine, comprising a conditioning tank 1 for adding chemicals at the liquid sludge inlet, a belt dewatering machine 2 for spreading the flocculated sludge, a tensioning assembly for adjusting the filter cloth, a filter pressing assembly for pressing the sludge, a correction assembly for correcting the filter cloth's deviation, a rinsing assembly for rinsing the filter cloth, a drive assembly, and a filter cloth assembly. The correction assembly is located inside the belt dewatering machine 2 and includes a separation hood 3 and separate housings for... The separation hood 3 contains a cleaning mechanism for cleaning the filter cloth and a rinsing mechanism for rinsing the filter cloth. The rinsing mechanism also includes a flow meter 23 installed on the surface of the outlet pipe of the belt dewatering machine. The rinsing mechanism includes a water tank 10 fixed in the separation hood 3. The bottom of the water tank 10 is connected to multiple nozzles 16. The control valves of the nozzles 16 are electrically connected to the flow meter 23. A pressure box 11 is fixedly connected to the surface of the water tank 10. A piston plate 13 driven by a cylinder 12 is slidably connected to the inner cavity of the pressure box 11. The surface of the pressure chamber 11 has multiple one-way air inlets, and the bottom of the pressure chamber 11 is connected to multiple exhaust pipes 15. The multiple exhaust pipes 15 are connected to the nozzles 16 through three-way pipes 14. During use, the flow meter 23 counts the water flow in real time. When the average water output per unit time decreases, it indicates that the filter cloth is severely clogged. At this time, the flow meter 23 controls the control valve to increase the water output of the nozzles 16 to rinse the filter cloth, increasing the rinsing force. It is not necessary to maintain high water pressure rinsing all the time, which saves water. The rinsing water of the nozzles 16 is recycled. Impurities are inevitable in the water, which can easily cause blockage of the inner cavity of the nozzles 16. At this time, the piston plate 13 driven by the cylinder 12 moves up and down in the pressure chamber 11, drawing in air through the one-way air inlets, and then pressurizing it before spraying it into the nozzles 16 through the exhaust pipes 15 to perform high-pressure cleaning and spray out impurities. During rinsing, the water in the nozzles 16 can be pressurized and sprayed out under high pressure, which can achieve effective rinsing while saving water.

[0022] The inner cavity of the separation hood 3 is equipped with a reversing roller 17 for reversing the direction of the filter cloth. The bottom of the separation hood 3 has an output port 18 for outputting the filter cloth. A baffle 22 surrounds the output port 18 to block the output port 18, preventing the rinsing water from leaking out. This effectively recovers the rinsing water and prevents it from mixing with sewage and affecting subsequent processes.

[0023] Reuse.

[0024] The bottom of the separation hood 3 is connected to a recycling pipe 20. A guide slope 21 is provided at the bottom of the inner cavity of the separation hood 3. The lowest point of the guide slope 21 is located on the side of the recycling pipe 20. The recycling pipe 20 recycles the flushed wastewater, filters it through a filtration device, and then sends it back to the water tank 10 for recycling.

[0025] The cleaning mechanism includes a slot 4 located on the right side of the separation hood 3. The inner cavity of the slot 4 is rotatably connected to a rotating shaft 6 driven by a motor and a squeezing roller 5 for receiving the bottom of the filter cloth. Multiple scraper assemblies for scraping the filter cloth are fixed circumferentially on the surface of the rotating shaft 6. The filter cloth is received by the squeezing roller 5, and then the rotating shaft 6 rotates, causing the scraper assembly to abut against one side of the filter cloth to clean its surface and scrape off the attached sludge.

[0026] The scraper assembly includes a fixed plate 7 fixed to the surface of the rotating shaft 6. A scraper 9 is slidably connected to one side of the fixed plate 7, and a return spring 8 is fixedly connected to one side of the fixed plate 7. One end of the return spring 8 is fixedly connected to one side of the scraper 9. During use, one side of the scraper 9 abuts against the surface of the filter cloth to clean the dirt on its surface. And through the push of the return spring 8, when the end of the scraper 9 is worn, it can continue to extend and abut against the surface of the filter cloth under the elastic force, maintaining a continuous cleaning effect. And when one scraper 9 is worn, by rotating the rotating shaft 6, the next scraper 9 is driven to rotate 60 degrees and abut against the surface of the filter cloth, alternating between the two scrapers. It is not necessary to replace one scraper immediately after it is worn, thus extending the processing time.

[0027] The scraper 9 has an inclined surface on one side. By setting the cut surface at an angle, it does not directly contact the filter cloth. The gradually increasing inclination increases the contact area, which can prevent tearing and damage to the surface of the filter cloth.

[0028] The belt dewatering machine 2 is equipped with an SS304 stainless steel enclosed protective door on the outside.

[0029] The dewatering components inside the belt dewatering machine 2 include a concentration section, a low-pressure filtration section, a medium-pressure filtration section, and a high-pressure filtration section, totaling three filter belts. Three rinsing components are provided, and they are respectively located on the front or back of the three filter belts of the belt dewatering machine 2.

[0030] The three rinsing components are set with the bottom facing upwards by roller guides, and rinse the three filter cloths from top to bottom to ensure cleanliness.

[0031] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A resource-saving and water-saving belt dewatering machine, comprising a conditioning tank (1) for adding chemicals at the liquid sludge inlet, a belt dewatering machine (2) for spreading the flocculated sludge, a tensioning assembly for adjusting the filter cloth, a filter pressing assembly for pressing the sludge, a correction assembly for correcting the filter cloth's deviation, a rinsing assembly for rinsing the filter cloth, a drive assembly, and a filter cloth assembly, characterized in that: The correction assembly is located in the inner cavity of the belt dewatering machine (2), including a separation hood (3) and a cleaning mechanism and a rinsing mechanism respectively located in the inner cavity of the separation hood (3) for cleaning the filter cloth; the rinsing mechanism also includes a flow meter (23) located on the surface of the outlet pipe of the belt dewatering machine, the rinsing mechanism includes a water tank (10) fixed in the inner cavity of the separation hood (3), the bottom of the water tank (10) is connected to multiple nozzles (16), the control valve of the nozzle (16) is electrically connected to the flow meter (23), the surface of the water tank (10) is fixedly connected to a pressure box (11), the inner cavity of the pressure box (11) is slidably connected to a piston plate (13) driven by a cylinder (12), the surface of the pressure box (11) is provided with multiple one-way air inlets, the bottom of the pressure box (11) is connected to multiple exhaust pipes (15), the multiple exhaust pipes (15) are respectively connected to the nozzles (16) through a three-way pipe (14); The inner cavity of the separation cover (3) is provided with a reversing roller (17) for reversing the filter cloth. The bottom of the separation cover (3) is provided with an output port (18) for outputting the filter cloth. The output port (18) is surrounded by a baffle (22). The bottom of the separation hood (3) is connected to the recovery pipe (20), and a guide slope (21) is provided at the bottom of the inner cavity of the separation hood (3). The lowest point of the guide slope (21) is located on the side of the recovery pipe (20). The cleaning mechanism includes an empty slot (4) opened on the right side of the separation cover (3). The inner cavity of the empty slot (4) is rotatably connected to a rotating shaft (6) driven by a motor and a squeezing roller (5) for receiving the bottom of the filter cloth. The surface of the rotating shaft (6) is circumferentially fixed with a plurality of scraper assemblies for scraping the filter cloth. The scraper assembly includes a fixed plate (7) fixed to the surface of the rotating shaft (6), a scraper (9) is slidably connected to one side of the fixed plate (7), and a return spring (8) is fixedly connected to one side of the fixed plate (7), with one end of the return spring (8) fixedly connected to one side of the scraper (9).

2. The resource-saving and water-saving belt dewatering machine according to claim 1, characterized in that: The scraper (9) has an inclined surface on one side.

3. The resource-saving and water-saving belt dewatering machine according to claim 1, characterized in that: The belt dehydrator (2) is equipped with an SS304 stainless steel enclosed protective door on the outside.

4. The resource-saving and water-saving belt dewatering machine according to claim 1, characterized in that: The dewatering components inside the belt dewatering machine (2) include a concentration section, a low-pressure filter section, a medium-pressure filter section, and a high-pressure filter section, totaling three filter belts. There are three rinsing components, which are respectively located on the front or back of the three filter belts of the belt dewatering machine (2).

5. A resource-saving, water-saving belt dewatering machine according to claim 1, characterized in that: This includes belt dehydrators involving conventional pressure as well as high-pressure belt dehydrators, conditioning tanks for matching chemicals, and belt concentrators.

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