Water-saving type belt dehydrator capable of saving resources

Abstract

The invention relates to a resource-saving water-saving belt type dehydrator. The dehydrator simultaneously comprises a conditioning tank which is arranged at a liquid sludge inlet and is used for adding a medicament, and a belt type thickener which is used for spreading flocculated sludge. The invention relates to the technical field of solid waste dehydration reduction and solid-liquid separation, in particular to a resource-saving water-saving belt type dehydrator, when the dehydrator is used, the flow meter is used for carrying out real-time water quantity statistics on filter-pressed water, when the average water yield in unit time is reduced, the flow meter gives out a signal, and when the average water yield in unit time is reduced, the water-saving belt type dehydrator is started. The opening and closing degree of the control valve is controlled after conversion of the plc controller, the water yield of the spray head is increased, high-water-pressure flushing does not need to be kept all the time, more water is saved, water in the spray head is pressurized to be sprayed out at high pressure, and the effective flushing effect can be achieved while water is saved; in addition, sewage generated after flushing is recycled, filtered through the filtering equipment and then conveyed into the water tank again for cyclic utilization, and the water consumption is reduced while the cleaning effect can be guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of solid waste dehydration and solid-liquid separation technology, and relates to a conventional pressure belt dehydrator and a high-pressure belt dehydrator, and also includes a matching reagent conditioning tank and a belt concentrator, and is specifically a resource-saving and water-saving belt dehydrator system. Background Art

[0002] Belt dewatering machine has the advantages of large processing capacity, high dewatering efficiency, automatic and continuous operation, and dewatering pressure can be adjusted according to the properties of solid waste such as sludge and the moisture content of filter cake. It is widely used in municipal sludge treatment and industrial sludge treatment in paper and pulp, metallurgy, tobacco, mineral processing, coal processing, chemical industry, food and other industries. However, since the filter belt of belt dewatering machine is continuously and automatically operated, in order to obtain filter cake with lower moisture content, the filter belt needs to be cleaned online. The online cleaning water volume of belt dewatering machine on the market is 4 to 6 m³ / h·m bandwidth for a single filter belt. The demand for cleaning water is larger than that of other dewatering equipment, especially in places where there is a lack of water sources such as centralized treatment plants for solid waste such as sludge and small treatment stations, the application of belt dewatering machine is limited. Summary of the invention

[0003] In view of the deficiencies of the prior art, the present invention provides a resource-saving and water-saving belt dehydrator to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a resource-saving and water-saving belt dehydrator, comprising a conditioning tank for adding a reagent arranged at the inlet of liquid sludge, a belt dehydrator for flattening the flocculated sludge, a tensioning assembly for adjusting the filter cloth, a filter pressing assembly for filtering the sludge, a deviation correction assembly for correcting the deviation of the filter cloth, a flushing assembly for flushing the filter cloth, a driving assembly and a filter cloth assembly, wherein the deviation correction assembly is arranged in the inner cavity of the belt thickener, and comprises a separation cover and a cleaning mechanism for cleaning the filter cloth and a flushing mechanism for flushing the filter cloth, which are respectively arranged in the inner cavity of the separation cover; The flushing mechanism also includes a flow meter arranged on the surface of the water outlet pipe of the belt dehydrator. The flushing mechanism includes a water tank fixed in the inner cavity of the separation cover, a plurality of nozzles are connected to the bottom of the water tank, the control valve of the nozzle is electrically connected to the flow meter, a pressurizing box is fixedly connected to the surface of the water tank, a piston plate driven by a cylinder is slidably connected to the inner cavity of the pressurizing box, a plurality of one-way air inlets are opened on the surface of the pressurizing box, a plurality of exhaust pipes are connected to the bottom of the pressurizing box, and the plurality of exhaust pipes are respectively connected to the nozzles through three-way pipes. When in use, the water volume of the filtered water is counted in real time through the flow meter. When the average water output per unit time is reduced, , this means that the filter cloth is severely clogged. At this time, the flow meter controls the control valve to increase the water output of the nozzle to flush the filter cloth and increase the flushing intensity. There is no need to maintain high water pressure for flushing, which is more water-saving. The flushing water of the nozzle will be recycled. Impurities will inevitably exist in the water, which can easily cause blockage in the inner cavity of the nozzle. At this time, the piston plate is driven up and down in the pressurized box by the cylinder, and air is drawn in through the one-way air inlet, and then pressurized and sprayed into the nozzle through the exhaust pipe. The interior is cleaned at high pressure to eject impurities, and the water in the nozzle can be pressurized during flushing to eject it at high pressure, which can save water and play an effective flushing role at the same time.

[0005] As a further solution of the present invention: the inner cavity of the separation cover is provided with a reversing roller for reversing the filter cloth, and the bottom of the separation cover is provided with an output port for outputting the filter cloth. The output port is surrounded by a baffle. The baffle is provided to block the output port to prevent flushing water from leaking out, so that the flushing water can be effectively recovered to prevent it from mixing with sewage and affecting subsequent reuse.

[0006] As a further solution of the present invention: the bottom of the separation cover is connected to a recovery pipe, and the bottom of the inner cavity of the separation cover is provided with a guide slope, the lowest point of the guide slope is located on the side of the recovery pipe, and the recovery pipe recycles the flushed sewage and filters it through the filtering equipment and then re-transports it to the water tank for recycling.

[0007] As a further solution of the present invention: the cleaning mechanism includes an empty slot opened on the right side of the separation cover, the inner cavity of the empty slot is rotatably connected to a rotating shaft driven by a motor and an extrusion roller for supporting the bottom of the filter cloth, and a plurality of scraper assemblies for scraping the filter cloth are circumferentially fixed on the surface of the rotating shaft. The filter cloth is supported by the extrusion roller, and then the rotating shaft rotates, driving the scraper assembly to abut against one side of the filter cloth to clean its surface and scrape off the attached sludge.

[0008] As a further solution of the present invention: the scraper assembly includes a fixed plate fixed on the surface of the extrusion roller, a scraper is slidably connected to one side of the fixed plate, 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, and when in 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 be extended out and abut against the surface of the filter cloth under the elastic force to maintain a continuous cleaning effect, and when one scraper is worn, by rotating the rotating shaft, the next scraper is driven to rotate 60 degrees and abut against the surface of the filter cloth to alternate, and there is no need to replace one scraper immediately after it is worn, thereby extending the processing time.

[0009] As a further solution of the present invention: a slope is provided on one side of the scraper, which is inclined so as not to directly contact the filter cloth and gradually inclines to increase the contact area, thereby preventing the filter cloth surface from being torn and damaged.

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

[0011] As a further solution of the present invention: the dehydration assembly in the belt dehydrator includes three filter belts, namely, a concentration section, a low-pressure filter press section, a medium-pressure filter press section, and a high-pressure filter press section. Three flushing assemblies are provided, and are respectively arranged on the front or back side of the three filter belts of the belt dehydrator. The three flushing assemblies are arranged upward with the bottom guided by rollers, and the three filter cloths are respectively flushed from top to bottom to ensure cleanliness.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a flow meter to count the water volume of the filter press water in real time during use. When the average water output per unit time decreases, it indicates that the filter cloth is severely clogged. At this time, the flow meter gives a signal, which is converted by a PLC controller to control the opening and closing size of the control valve. When the water output is lower than a preset threshold, the valve opening is increased until the threshold is reached and then the filter cloth stops. When the water output is greater than the preset threshold, the valve opening is reduced until the threshold is reached and then the filter cloth stops. The water output of the nozzle is increased to flush the filter cloth, and the flushing intensity is increased. There is no need to maintain high water pressure for flushing, which is more water-saving. The flushing water of the nozzle can be recycled. Impurities are inevitably present in the water, which can easily cause the nozzle cavity to be clogged. At this time, the piston plate is driven by the cylinder to move up and down in the pressurized box, and air is drawn in through the one-way air inlet. Then, it is pressurized and sprayed into the nozzle through the exhaust pipe to clean the interior of the nozzle at high pressure to spray out impurities. When flushing, the water in the nozzle can be pressurized to be sprayed out at high pressure, which can save water and play an effective flushing role.

[0013] According to the present invention, when in use, one side of the scraper abuts against the surface of the filter cloth to clean the dirt on the surface, and through the push of the reset spring, when the end of the scraper is worn, it can continue to extend under the elastic force to abut against the surface of the filter cloth to maintain a continuous cleaning effect, and when one scraper is worn, the rotating shaft is rotated to drive the next scraper to rotate 60 degrees and abut against the surface of the filter cloth, alternating, and there is no need to replace one scraper immediately after it is worn, which prolongs the processing time.

[0014] In the present invention, the lowest point of the guiding slope is located at the side of the recovery pipe, and the recovery pipe recovers the flushed sewage and transmits it to the water tank again after filtering through the filtering equipment for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A; Figure 3 For the present invention Figure 1 A partial enlarged view of point B in the middle.

[0016] In the figure: 1. conditioning tank; 2. belt dehydrator; 3. separation cover; 4. empty tank; 5. squeezing roller; 6. rotating shaft; 7. fixed plate; 8. reset spring; 9. scraper; 10. water tank; 11. pressurizing box; 12. cylinder; 13. piston plate; 14. three-way pipe; 15. exhaust pipe; 16. nozzle; 17. reversing roller; 18. output port; 20. recovery pipe; 21. guide slope; 22. baffle; 23. flow meter. DETAILED DESCRIPTION

[0017] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0018] See also Figure 1-3 The present invention provides a technical solution: a resource-saving and water-saving belt dewatering machine, comprising a conditioning tank 1 arranged at the inlet of liquid sludge for adding a reagent, a belt dewatering machine 2 for flattening the flocculated sludge, a tensioning assembly for adjusting the filter cloth, a filter pressing assembly for filtering the sludge, a deviation correction assembly for correcting the deviation of the filter cloth, a flushing assembly for flushing the filter cloth, a driving assembly and a filter cloth assembly, the deviation correction assembly is arranged in the inner cavity of the belt dewatering machine 2, and comprises a separation cover 3 and a cleaning mechanism for cleaning the filter cloth and a flushing mechanism for flushing the filter cloth respectively arranged in the inner cavity of the separation cover 3; The flushing mechanism also includes a flow meter 23 arranged on the surface of the water outlet pipe of the belt dehydrator. The flushing mechanism includes a water tank 10 fixed in the inner cavity of the separation cover 3. The bottom of the water tank 10 is connected to a plurality of 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 pressurizing box 11. The inner cavity of the pressurizing box 11 is slidably connected to a piston plate 13 driven by a cylinder 12. The surface of the pressurizing box 11 is provided with a plurality of one-way air inlets. The bottom of the pressurizing box 11 is connected to a plurality of exhaust pipes 15. The plurality of exhaust pipes 15 are respectively connected to the nozzle 16 through a three-way pipe 14. When in use, the water volume of the filtered water is counted in real time through the flow meter 23. When the average water output per unit time is reduced , it means 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 nozzle 16 to flush the filter cloth and increase the flushing intensity. There is no need to maintain high water pressure for flushing, which is more water-saving. The flushing water of the nozzle 16 will be recycled. Impurities will inevitably exist in the water, which may easily cause the inner cavity of the nozzle 16 to be clogged. At this time, the piston plate 13 is driven by the cylinder 12 to move up and down in the pressurized box 11, and air is drawn in through the one-way air inlet, and then pressurized and sprayed into the nozzle 16 through the exhaust pipe 15, and the interior is cleaned at high pressure to spray out impurities. In addition, the water in the nozzle 16 can be pressurized during flushing to make it spray out at high pressure, which can save water and play an effective flushing role.

[0019] 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 baffle 22 is provided to block the output port 18 to prevent the flushing water from leaking out. The flushing water can be effectively recycled to prevent it from mixing with sewage and affecting subsequent reuse.

[0020] The bottom of the separation cover 3 is connected to a recovery pipe 20, and a guide slope 21 is provided at the bottom of the inner cavity of the separation cover 3. The lowest point of the guide slope 21 is located on the side of the recovery pipe 20. The recovery pipe 20 recovers the flushed sewage and filters it through a filtering device and then re-transports it to the water tank 10 for recycling.

[0021] 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 an extrusion roller 5 for receiving the bottom of the filter cloth. A plurality of scraper assemblies for scraping the filter cloth are circumferentially fixed on the surface of the rotating shaft 6. The filter cloth is received by the extrusion roller 5, and then the rotating shaft 6 rotates, driving the scraper assembly to abut against one side of the filter cloth to clean its surface and scrape off the attached sludge.

[0022] The scraper assembly includes a fixed plate 7 fixed on the surface of the squeezing roller 5, a scraper 9 is slidably connected to one side of the fixed plate 7, a return spring 8 is fixedly connected to one side of the fixed plate 7, and one end of the return spring 8 is fixedly connected to one side of the scraper 9. When in 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 be extended out and abut against the surface of the filter cloth under the elastic force to maintain 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 to alternate, and there is no need to replace one scraper immediately after it is worn, thereby extending the processing time.

[0023] One side of the scraper 9 is provided with an inclined surface, which is arranged by tilting the cut surface so as not to directly contact the filter cloth. The contact area is gradually increased by tilting, thereby preventing the filter cloth surface from being torn and damaged.

[0024] The outer side of the belt dehydrator 2 is provided with a SS304 stainless steel closed protective door.

[0025] The dehydration components in the belt dehydrator 2 include three filter belts, namely, a concentration section, a low-pressure filter press section, a medium-pressure filter press section, and a high-pressure filter press section. There are three flushing components, which are respectively arranged on the front or back side of the three filter belts of the belt dehydrator 2. The three flushing components are arranged upward with the bottom guided by rollers, and the three filter cloths are respectively flushed from top to bottom to ensure cleanliness.

[0026] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above in the form of preferred embodiments, it is not intended to limit the present invention. Any technical personnel in the field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A resource-saving and water-saving belt dehydrator, comprising a conditioning tank (1) arranged at the inlet of liquid sludge for adding a reagent, a belt dehydrator (2) for spreading the flocculated sludge, a tensioning assembly for adjusting the filter cloth, a filter pressing assembly for filtering the sludge, a deviation correction assembly for correcting the deviation of the filter cloth, a flushing assembly for flushing the filter cloth, a driving assembly and a filter cloth assembly, characterized in that: The deviation correction component is arranged in the inner cavity of the belt dehydrator (2), comprising a separation cover (3) and a cleaning mechanism for cleaning the filter cloth and a flushing mechanism for flushing the filter cloth, respectively arranged in the inner cavity of the separation cover (3); The flushing mechanism also includes a flow meter (23) arranged on the surface of the water outlet pipe of the belt dehydrator. The flushing mechanism includes a water tank (10) fixed in the inner cavity of the separation cover (3). The bottom of the water tank (10) is connected to a plurality of 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 pressurizing box (11). The inner cavity of the pressurizing box (11) is slidably connected to a piston plate (13) driven by a cylinder (12). The surface of the pressurizing box (11) is provided with a plurality of one-way air inlets. The bottom of the pressurizing box (11) is connected to a plurality of exhaust pipes (15). The plurality of exhaust pipes (15) are respectively connected to the nozzles (16) through three-way pipes (14).

2. A resource-saving and water-saving belt dehydrator according to claim 1, characterized in that: The inner cavity of the separation cover (3) is provided with a reversing roller (17) for reversing the filter cloth, and the bottom of the separation cover (3) is provided with an output port (18) for outputting the filter cloth, and a baffle (22) surrounds the output port (18).

3. The resource-saving and water-saving belt dehydrator according to claim 1, characterized in that: The bottom of the separation cover (3) is connected to a recovery pipe (20), and the bottom of the inner cavity of the separation cover (3) is provided with a guide slope (21), the lowest point of the guide slope (21) being located on the side of the recovery pipe (20).

4. The resource-saving and water-saving belt dehydrator according to claim 1, characterized in that: The cleaning mechanism comprises an empty slot (4) provided 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; a plurality of scraper assemblies for scraping the filter cloth are circumferentially fixed to the surface of the rotating shaft (6).

5. The resource-saving and water-saving belt dehydrator according to claim 1, characterized in that: The scraper assembly comprises a fixed plate (7) fixed on the surface of the squeezing roller (5), a scraper (9) being slidably connected to one side of the fixed plate (7), a return spring (8) being fixedly connected to one side of the fixed plate (7), and one end of the return spring (8) being fixedly connected to one side of the scraper (9).

6. The resource-saving and water-saving belt dehydrator according to claim 5, characterized in that: One side of the scraper (9) is provided with an inclined surface.

7. The resource-saving and water-saving belt dehydrator according to claim 1, characterized in that: The outer side of the belt dehydrator (2) is provided with an SS304 stainless steel closed protective door.

8. The resource-saving and water-saving belt dehydrator according to claim 1, characterized in that: The dehydration components in the belt dehydrator (2) include a concentration section, a low-pressure filter press section, a medium-pressure filter press section, and a high-pressure filter press section, a total of three filter belts. Three flushing components are provided, and are respectively arranged on the front side or the back side of the three filter belts of the belt dehydrator (2).

9. The resource-saving and water-saving belt dehydrator according to claim 1, characterized in that: It includes belt dehydrators with conventional pressure, high-pressure belt dehydrators, matching reagent conditioning tanks, and belt concentrators.

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