Sludge filter-pressing dehydration device and sludge treatment system

Abstract

The invention relates to a sludge filter-press dewatering device which comprises an ultrasonic cracking device, a sludge distributing device, a filter-press device and a filter cloth conveying device, the sludge distributing device comprises a sludge distributing pipeline connected with a sludge outlet of the ultrasonic cracking device, and a sludge distributing opening is formed in the end, away from the ultrasonic cracking device, of the sludge distributing pipeline; the filter pressing device comprises a filter pressing cage and a pressure device; the filter cloth conveying device comprises a first conveying assembly, a second conveying assembly and a traction assembly, the first conveying assembly conveys upper-layer filter cloth to the traction assembly through the position above the sludge distribution opening, the second conveying assembly conveys lower-layer filter cloth to the traction assembly through the position below the sludge distribution opening, and the traction assembly is arranged above the filter pressing cage in a reciprocating motion mode. And a wrapping body formed by the upper-layer filter cloth, the lower-layer filter cloth and the sludge is stacked in the filter pressing cage in a zigzag shape. The sludge filter-pressing dehydration device can realize the dehydration process of the sludge only by electric energy without adding a large amount of dehydration chemicals and lime, can enable the water content of the dry sludge to be below 40%, and is good in economical efficiency and high in efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of sludge treatment, and in particular to a sludge filter press dewatering device and a sludge treatment system. Background Art

[0002] As the scale of urban sewage treatment continues to expand, the production of municipal sludge is also increasing. The activated sludge process is a common method for water purification in sewage treatment, which uses the biological activity of microorganisms to purify organic pollutants from wastewater, thereby achieving standard discharge. This process generates a large amount of municipal sludge. As industry requirements for harmless and resource-efficient sludge disposal increase, simple land use, dewatering, and lime-stabilized landfill processes are gradually being phased out. Waste-to-energy plants are rapidly developing and their technology is mature. There are also many successful projects using municipal waste incinerators to incinerate sewage sludge. Sludge incineration is currently a common method, offering advantages in volume reduction and stabilization, and is widely used in cement plants and power plants. For example, sludge treatment in sewage treatment plants in the three major areas of Shanghai's central urban area primarily relies on independent incineration, supplemented by co-incineration. The co-incineration sludge disposal method depends on the scale of the waste-to-energy plant, and the amount of co-incineration typically does not exceed 15% of the waste input. Therefore, for cities or regions with large populations, strong economic conditions, and high sludge disposal needs, centralized sludge drying and independent incineration is a more suitable option.

[0003] Incineration has high requirements for the moisture content of sludge, usually less than 40%. Since conventional mechanical dehydration cannot meet this requirement, various thermal drying technologies are used to dehydrate sludge at the front end of incineration. Typical thermal drying technologies include: disc dryers, paddle dryers, thin-layer dryers, and low-temperature belt dryers. Currently, most thermal drying technologies can achieve stable operation, but because they require a large amount of heat source, the actual operating cost of the project is greatly increased. Common heat sources are mainly steam and electricity. Dryers that use electricity as a heat source usually consume a lot of electricity, while dryers that use steam as a heat source usually need to rely on power plants that co-process sludge to provide steam. Therefore, dryers with this type of heat source are usually subject to surrounding heating conditions.

[0004] Given the current operating status of sludge dewatering equipment on the market, there is an urgent need to develop a mechanical filter press capable of dehydrating sludge with a moisture content of 80% to below 40%. This would remove moisture from wet sludge without causing a phase change, effectively avoiding the significant energy consumption during the drying process and, consequently, reducing dehydration costs at the front end of sludge incineration. Currently, the most common mechanical filter press on the market is the plate and frame filter press. This type of filter press typically requires the addition of large amounts of dehydrating agents (polyacrylamide, PAM / polyaluminum chloride, PAC) and struggles to achieve the desired sludge moisture content for incineration. In this scenario, large amounts of lime are often required to reduce the moisture content of the plate and frame sludge to below 40%, which not only affects the calorific value of the sludge but also wastes significant manpower, material, and financial resources. Summary of the Invention

[0005] The first object of the present invention is to provide a sludge filter press dehydration device to reduce the amount of dehydrating agents and lime used, ensuring that the moisture content of the sludge after dehydration can be reduced to below the treatment target value.

[0006] The second object of the present invention is to provide a sludge treatment system including the above-mentioned sludge filter press dewatering device.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A sludge filter press dewatering device, comprising:

[0009] Ultrasonic cracking device, used for ultrasonic cracking pretreatment of sludge;

[0010] A mud distribution device, comprising a mud distribution pipe, the mud distribution pipe being connected to the sludge outlet of the ultrasonic cracking device, and a mud distribution port being provided at one end of the mud distribution pipe away from the ultrasonic cracking device;

[0011] The filter press device comprises a filter press cage and a pressure device, wherein the upper end of the filter press cage is provided with an inlet and an outlet, the pressure device is provided above the filter press cage, and the pressure end of the pressure device is used to enter the filter press cage through the inlet and outlet for vertical filter pressing;

[0012] The filter cloth conveying device includes a first conveying component, a second conveying component and a traction component. The first conveying component is used to convey the upper filter cloth to the traction component through the top of the mud cloth outlet. The second conveying component is used to convey the lower filter cloth to the traction component after passing the bottom of the mud cloth outlet to receive the sludge output from the mud cloth outlet. The traction component is used to pull the upper filter cloth and the lower filter cloth to form an inclusion body in which the sludge is compacted and wrapped between the upper filter cloth and the lower filter cloth, and the traction component is reciprocally arranged above the filter press cage to stack the inclusion body in a zigzag shape in the filter press cage.

[0013] In one embodiment of the present application, the traction assembly includes:

[0014] A tractor, comprising a vehicle body and a vehicle body driving device, wherein the vehicle body driving device is used to drive the vehicle body to move back and forth relative to the filter press cage;

[0015] a traction roller assembly, comprising an upper traction roller and a lower traction roller arranged in pairs, wherein the upper traction roller is used to traction-drive the upper filter cloth, and the lower traction roller is used to traction-drive the lower filter cloth, and a preset gap is provided between the upper traction roller and the lower traction roller to allow the inclusion to pass through and compact the sludge between the upper filter cloth and the lower filter cloth;

[0016] The traction roller driving device is connected to the upper traction roller and the lower traction roller in a transmission manner to drive the upper traction roller and the lower traction roller to rotate synchronously in opposite directions.

[0017] In one embodiment of the present application, the traction assembly further includes a filtrate funnel, which is disposed on the vehicle body, and the inlet of the filtrate funnel is located below the traction roller group, and the outlet of the filtrate funnel is connected to the wastewater tank.

[0018] In one embodiment of the present application, the traction assembly further includes a position adjustment device, and the upper traction roller and / or the lower traction roller are adjustably arranged on the vehicle body through the position adjustment device so that the gap between the upper traction roller and the lower traction roller is adjustable.

[0019] In one embodiment of the present application, the vehicle body driving device is a piston cylinder, or the vehicle body driving device is a linear motor, or the vehicle body driving device includes a rotary motor and a transmission mechanism.

[0020] In one embodiment of the present application, the first conveying assembly includes:

[0021] a first conveying drive device, comprising a first drive motor and a first drive roller, wherein the first drive roller is disposed at a drive end of the first drive motor and is used to wind the upper filter cloth;

[0022] The first limiting support roller group includes a plurality of first limiting support rollers arranged in sequence from the first driving roller to the traction assembly, at least one of the first limiting support rollers is staggered with the other first limiting support rollers, and the upper filter cloth starts from the first driving roller and passes through each of the first limiting support rollers in sequence before being engaged with the traction assembly.

[0023] In one embodiment of the present application, the first conveying assembly further includes a first clamping roller device, which is arranged between the first conveying drive device and the first limiting support roller group, and the first clamping roller device includes a first upper clamping roller and a first lower clamping roller. The upper filter cloth passes between the first upper clamping roller and the first lower clamping roller and is clamped and limited by the first upper clamping roller and the first lower clamping roller.

[0024] In one embodiment of the present application, the second conveying assembly includes:

[0025] a second conveying drive device, comprising a second drive motor and a second drive roller, wherein the second drive roller is disposed at a drive end of the second drive motor and is used to wind the lower filter cloth;

[0026] a discharge roller, arranged on a side of the second conveying drive device away from the traction assembly;

[0027] The second position-limiting support roller group includes a plurality of second position-limiting support rollers arranged in sequence from the discharge roller to the traction assembly. The lower filter cloth starts from the second driving roller and flips over the discharge roller and sequentially passes through each of the second position-limiting support rollers before being engaged with the traction assembly.

[0028] In one embodiment of the present application, the second conveying assembly further includes a second clamping roller device, which is arranged between the second conveying drive device and the unloading roller. The second clamping roller device includes a second upper clamping roller and a second lower clamping roller. The lower filter cloth passes between the second upper clamping roller and the second lower clamping roller and is clamped and limited by the second upper clamping roller and the second lower clamping roller.

[0029] In one embodiment of the present application, the sludge filter press dewatering device further includes a dry mud shovel plate, which is arranged on one side of the discharge roller and is gap-matched with the discharge roller.

[0030] In one embodiment of the present application, the mud distribution device further includes a mud distribution plate, which is arranged above the lower filter cloth and is used to scrape the sludge on the lower filter cloth flat.

[0031] In one embodiment of the present application, the sludge filter press dewatering device also includes a track, and multiple filter press cages can be movably arranged on the track between the standby pressure position and the filter press position, the traction assembly is arranged above the standby pressure position, and the pressure device is arranged above the filter press position.

[0032] A sludge treatment system comprises the sludge filter press dewatering device as described in any one of the above.

[0033] It can be seen from the above technical scheme that the present invention discloses a sludge filter press dewatering device, which includes an ultrasonic cracking device, a mud spreading device, a filter press device and a filter cloth conveying device, wherein the ultrasonic cracking device is used to perform ultrasonic cracking pretreatment on the sludge; the mud spreading device includes a mud spreading pipe, which is connected to the sludge outlet of the ultrasonic cracking device, and a mud spreading port is provided at one end of the mud spreading pipe away from the ultrasonic cracking device; the filter press device includes a filter press cage and a pressure device, the upper end of the filter press cage is provided with an inlet and an outlet, the pressure device is provided above the filter press cage, and the pressure end of the pressure device is used for Vertical filtration is performed when entering the filter press cage from the inlet and outlet; the filter cloth conveying device includes a first conveying assembly, a second conveying assembly and a traction assembly, the first conveying assembly is used to convey the upper filter cloth to the traction assembly through the top of the mud cloth outlet, the second conveying assembly is used to convey the lower filter cloth to the traction assembly after passing the bottom of the mud cloth outlet to receive the sludge output from the mud cloth outlet, and the traction assembly is used to pull the upper filter cloth and the lower filter cloth to form an inclusion body in which the sludge is compacted and wrapped between the upper filter cloth and the lower filter cloth, and the traction assembly is reciprocatingly arranged above the filter press cage to stack the inclusion body in a zigzag shape in the filter press cage.

[0034] During application, the sludge is first ultrasonically cracked in an ultrasonic cracking device. The cell structure in the sludge is broken under the action of high-frequency acoustic vibration and shearing. The water in the cells loses the protection of the cell wall and is released. At this time, the dewatering performance of the sludge is greatly improved, and most of the water in the sludge can be removed by subsequent mechanical filtration.

[0035] Then the first conveying component and the second conveying component of the filter cloth conveying device synchronously convey the upper filter cloth and the lower filter cloth to the filter press device. During this process, the mud distribution device conveys the sludge to the lower filter cloth. While pulling the upper filter cloth and the lower filter cloth, the traction component covers the upper filter cloth on the lower filter cloth and the sludge to form an inclusion, and at the same time performs preliminary compaction of the sludge. As the traction component moves back and forth, the inclusion is stacked in a zigzag shape in the filter press cage. Finally, the pressure device of the filter press device squeezes and maintains the pressure on the inclusion stacked in the filter press cage, thereby performing filter press dehydration on the sludge. After dehydration is completed, the first conveying component, the second conveying component and the traction component of the filter cloth conveying device operate in reverse to remove the inclusion from the filter press cage and recover the filter cloth. During the process of recovering the filter cloth, the dry sludge on the upper filter cloth and the lower filter cloth can be unloaded to complete a filter press operation.

[0036] The above-mentioned sludge filter press dewatering device integrates ultrasonic lysis treatment and vertical filter press treatment methods. Ultrasonic lysis can effectively break up cell structures and improve sludge dewatering performance. Vertical filter press can achieve higher pressure, and the moisture content of the sludge is significantly reduced, which is more conducive to the subsequent transportation and utilization of the sludge. During the filter press process, there is no need to add a large amount of dehydrating agents and lime, and the moisture content of the dry sludge can be reduced to below 40%. Since the agent addition link is omitted, only electricity is required to achieve the sludge dehydration process, reducing all heat consumption. No heat sources such as steam and flue gas are required, and the scenario applicability is better. At the same time, its operating cost is more economical and more efficient than most mechanical filter press equipment currently on the market. Moreover, due to the reduction in the addition of dehydrating agents and inorganic substances such as lime, the calorific value of the treated sludge is higher, which is more conducive to connecting mainstream sludge disposal processes such as incineration. In addition, the entire working process of the above-mentioned sludge filter press dewatering device can be fully automated without manual intervention, which can save a lot of labor costs and further reduce operating costs.

[0037] The present invention also discloses a sludge treatment system, which includes the sludge filter press dewatering device as described above. Therefore, the sludge treatment system should have the beneficial effects of the sludge filter press dewatering device as described above, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A schematic structural diagram of a sludge filter press dewatering device provided in an embodiment of the present invention;

[0040] Figure 2 A schematic diagram of loading filter cloth into a filter press cage of a sludge filter press dewatering device provided by an embodiment of the present invention;

[0041] Figure 3 A schematic diagram of removing filter cloth from a filter press cage in a sludge filter press dewatering device according to an embodiment of the present invention;

[0042] Figure 4 This is a schematic structural diagram of a sludge treatment system provided in an embodiment of the present invention.

[0043] In the picture:

[0044] 1 is an ultrasonic cracking device;

[0045] 2 is a mud spreading device; 210 is a mud spreading pipe; 220 is a mud spreading plate;

[0046] 3 is a filter press device; 310 is a pressure device; 320 is a filter press cage;

[0047] 4 is the first conveying assembly; 410 is the first conveying drive device; 411 is the first drive motor; 412 is the first drive roller; 420 is the first limit support roller; 430 is the first clamping roller device;

[0048] 5 is the second conveying assembly; 510 is the second conveying drive device; 511 is the second drive motor; 512 is the second drive roller; 520 is the discharge roller; 530 is the second limit support roller; 540 is the second clamping roller device;

[0049] 6 is a traction assembly; 610 is a vehicle body; 620 is a traction roller assembly;

[0050] 7 is an operating platform; 8 is an upper filter cloth; 9 is a lower filter cloth; 10 is a sludge conveying pipe; 11 is a sludge storage tank; 12 is a first sludge conveying device; 13 is a mixing device; 14 is a drug container; 15 is a drug conveying device; 16 is a stirring device; 17 is a second sludge conveying device; 18 is a wastewater tank; 19 is a sewage pipe network; 20 is a first dry sludge conveying device; 21 is a second dry sludge conveying device; 22 is a third dry sludge conveying device; 23 is a dry sludge container; 24 is a transport device. DETAILED DESCRIPTION

[0051] One of the core points of the present invention is to provide a sludge filter press dewatering device, the structural design of which enables it to reduce the amount of dehydrating agents and lime used, ensuring that the moisture content of the sludge after dehydration can be reduced to below the treatment target value.

[0052] Another core of the present invention is to provide a sludge treatment system including the above-mentioned sludge filter press dewatering device.

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0054] See also Figure 1 .

[0055] The embodiment of the present invention discloses a sludge filter press dehydration device, which includes an ultrasonic cracking device 1, a sludge spreading device 2, a filter press device 3 and a filter cloth conveying device.

[0056] Among them, the ultrasonic cracking device 1 is used to perform ultrasonic cracking pretreatment on the sludge. The inlet of the ultrasonic cracking device 1 is connected to the sludge storage device through the sludge conveying device. The power and output pulse frequency of the ultrasonic cracking device 1 can be adjusted according to the actual sludge properties and project scale. In a specific embodiment, the rated power of the ultrasonic cracking device 1 is ≤80KW, and the output pulse frequency is ≤50KHz.

[0057] The mud spreading device 2 includes a mud spreading pipe 210, which is connected to the sludge outlet of the ultrasonic cracking device 1. A mud spreading port is set at one end of the mud spreading pipe 210 away from the ultrasonic cracking device 1. The mud spreading pipe 210 can be set with one or more mud spreading ports, or the mud spreading device 2 can include multiple mud spreading pipes 210.

[0058] The filter press device 3 includes a filter press cage 320 and a pressure device 310. The upper end of the filter press cage 320 is provided with an inlet and outlet. The pressure device 310 is provided above the filter press cage 320. The pressure end of the pressure device 310 is used to enter the filter press cage 320 from the inlet and outlet for vertical filtration.

[0059] The filter cloth conveying device includes a first conveying component 4, a second conveying component 5 and a traction component 6. The first conveying component 4 is used to convey the upper filter cloth 8 to the traction component 6 through the top of the mud cloth outlet, and the second conveying component 5 is used to convey the lower filter cloth 9 to the traction component 6 after passing through the bottom of the mud cloth outlet to receive the sludge output from the mud cloth outlet. The traction component 6 is used to pull the upper filter cloth 8 and the lower filter cloth 9 to form an inclusion body in which the sludge is compacted and wrapped between the upper filter cloth 8 and the lower filter cloth 9, and the traction component 6 is reciprocatingly arranged above the filter press cage 320 to stack the inclusion body in a zigzag shape in the filter press cage 320.

[0060] During application, the sludge is first ultrasonically cracked in the ultrasonic cracking device 1. The cell structure in the sludge is broken under the action of high-frequency acoustic vibration and shearing, and the water in the cells loses the protection of the cell wall and is released. At this time, the dewatering performance of the sludge is greatly improved, and most of the water in the sludge can be removed by subsequent mechanical filtration.

[0061] Then as Figure 2 As shown, the first conveying component 4 and the second conveying component 5 of the filter cloth conveying device synchronously convey the upper filter cloth 8 and the lower filter cloth 9 to the filter press device 3. During this process, the mud distribution device 2 conveys sludge to the lower filter cloth 9. The traction component 6 covers the upper filter cloth 8 on the lower filter cloth 9 and the sludge to form an inclusion while traction. At the same time, the sludge is preliminarily compacted. With the reciprocating movement of the traction component 6, the inclusion is stacked in a zigzag shape in the filter press cage 320. Finally, the pressure device 310 of the filter press device 3 squeezes and maintains the inclusion stacked in the filter press cage 320, thereby performing filter press dehydration on the sludge. After dehydration is completed, the first conveying component 4, the second conveying component 5 and the traction component 6 of the filter cloth conveying device operate in reverse. Figure 3 As shown, the inclusion body is taken out from the filter press cage 320 and the filter cloth is recovered. During the filter cloth recovery process, the dry sludge on the upper filter cloth 8 and the lower filter cloth 9 can be unloaded to complete a filter press operation.

[0062] Compared with the prior art, the sludge filter press dewatering device provided in the embodiment of the present invention integrates ultrasonic lysis treatment and vertical filter press treatment. Ultrasonic lysis can effectively break up the cell structure and improve the sludge dewatering performance. Vertical filter press can achieve higher pressure, and the moisture content of the sludge is significantly reduced, which is more conducive to the subsequent transportation and utilization of the sludge. During the filter press process, there is no need to add a large amount of dehydrating agents and lime, and the moisture content of the dry sludge can be reduced to below 40%. Since the agent addition link is omitted, only electricity is required to achieve the sludge dehydration process, reducing all heat consumption. No heat sources such as steam and flue gas are required, and the scenario applicability is better. At the same time, its operating cost is more economical and more efficient than most mechanical filter press equipment currently on the market. Moreover, due to the reduction in the addition of inorganic substances such as dehydrating agents and lime, the calorific value of the treated sludge is higher, which is more conducive to connecting mainstream sludge disposal processes such as incineration. In addition, the entire working process of the above-mentioned sludge filter press dewatering device can be fully automated without manual intervention, which can save a lot of labor costs and further reduce operating costs.

[0063] To facilitate personnel in operating the equipment, in one embodiment of the present application, the sludge filter press dewatering device further includes an operating platform 7 for operators to stand on, and the mud distribution pipe 210 of the mud distribution device 2 and the filter cloth conveying device are arranged on the operating platform 7.

[0064] like Figure 1 As shown, the traction assembly 6 includes a traction vehicle, a traction roller group 620 and a traction roller driving device, wherein the traction vehicle includes a vehicle body 610 and a vehicle body 610 driving device, the vehicle body 610 driving device is used to drive the vehicle body 610 to move back and forth relative to the filter press cage 320, the vehicle body 610 driving device is a piston cylinder, or the vehicle body 610 driving device is a linear motor, or the vehicle body 610 driving device includes a rotary motor and a transmission mechanism, during the process of removing the inclusions from the filter press cage 320, the vehicle body 610 remains stationary, and the traction roller group 620 runs in the reverse direction.

[0065] The traction roller group 620 can be set as one group or multiple groups. The traction roller group 620 includes an upper traction roller and a lower traction roller arranged in pairs. The upper traction roller is used to traction and drive the upper filter cloth 8, and the lower traction roller is used to traction and drive the lower filter cloth 9. There is a preset gap between the upper traction roller and the lower traction roller. The upper filter cloth 8 and the lower filter cloth 9 both pass through the gap between the upper traction roller and the lower traction roller. While the upper traction roller and the lower traction roller pull the upper filter cloth 8 and the lower filter cloth 9, the upper filter cloth 8 covers the sludge on the lower filter cloth 9 and the lower filter cloth 9 to form an inclusion body, and preliminarily compacts the sludge between the upper filter cloth 8 and the lower filter cloth 9.

[0066] It should be noted that, for the sake of ease of understanding, the present application adopts the description method of upper filter cloth 8 and lower filter cloth 9. This is only the relative position relationship between the two, and does not mean that the upper filter cloth 8 and the lower filter cloth 9 must be two separate filter cloths. In fact, the upper filter cloth 8 and the lower filter cloth 9 can be two separate filter cloths, or they can be a whole filter cloth connected at one end of the first conveying component 4 and the second conveying component 5.

[0067] The traction roller driving device is connected to the upper traction roller and the lower traction roller in a transmission manner to drive the upper traction roller and the lower traction roller to rotate synchronously in opposite directions.

[0068] It can be foreseen that when the inclusion body passes through the traction roller group 620, it will be squeezed by the upper traction roller and the lower traction roller, causing the filtrate in the sludge to seep out. In order to avoid the filtrate overflowing, in one embodiment of the present application, the traction assembly 6 also includes a filtrate funnel, which is arranged on the vehicle body 610, and the inlet of the filtrate funnel is located below the traction roller group 620, and the outlet of the filtrate funnel is connected to the wastewater tank 18 to collect the seeped filtrate.

[0069] It is foreseeable that during the sludge laying and filtration process, especially during the filtration process, a large amount of filtrate will flow out from the filter press cage 320. Figure 4As shown, the above-mentioned wastewater tank 18 is usually arranged below the filter press device 3, and the opening cross-sectional area of the wastewater tank 18 needs to be larger than the cross-sectional area of the filter press cage 320, so that the filtrate flowing out of the filter press cage 320 can be completely collected by the wastewater tank 18 to avoid outflow. At the same time, the above-mentioned filtrate funnel is connected to the wastewater tank 18 through a pipeline, and the wastewater tank 18 can be connected to the sewage pipe network 19, so that the filtrate is directly discharged into the sewage pipe network 19.

[0070] When multiple sludge filter press dewatering devices are used in parallel, such as Figure 4 As shown, the wastewater tanks 18 of the various sludge filter pressing and dewatering devices can be connected in parallel and then connected to the sewage pipe network 19.

[0071] Preferably, in one embodiment of the present application, the traction assembly 6 further includes a position adjustment device, and the upper traction roller and / or the lower traction roller are adjustably arranged on the vehicle body 610 through the position adjustment device, so that the gap between the upper traction roller and the lower traction roller is adjustable. In this way, when the inclusion body after filtration is taken out from the filter cage 320, the upper traction roller and the lower traction roller can be relatively separated, increasing the gap between the two, thereby facilitating the inclusion body to pass through the gap between the upper traction roller and the lower traction roller.

[0072] like Figure 1 As shown, the first conveying assembly 4 includes a first conveying drive device 410 and a first limiting support roller group, wherein the first conveying drive device 410 includes a first drive motor 411 and a first drive roller 412, the first drive roller 412 is arranged at the drive end of the first drive motor 411, and the first drive roller 412 is used to wind the upper filter cloth 8.

[0073] The first position-limiting support roller assembly includes a plurality of first position-limiting support rollers 420 sequentially arranged along the first drive roller 412 to the traction assembly 6. At least one first position-limiting support roller 420 is staggered above and below the other first position-limiting support rollers 420. This allows the upper filter cloth 8 to be tensioned while being zigzag-wound, allowing dry sludge adhering to the upper filter cloth 8 to fall off during its recovery. The upper filter cloth 8 passes through each of the first position-limiting support rollers 420 in sequence, starting from the first drive roller 412, and then engages with the traction assembly 6. The first position-limiting support roller assembly may also include one or more spare first position-limiting support rollers 420.

[0074] In order to ensure the stability of the upper filter cloth 8 during the transportation and recovery process, and to prevent the upper filter cloth 8 from carrying dry sludge and being recovered and wound onto the first drive roller 412, in one embodiment of the present application, the first conveying assembly 4 also includes a first clamping roller device 430, and the first clamping roller device 430 is arranged between the first conveying drive device 410 and the first limiting support roller group. The first clamping roller device 430 includes a first upper clamping roller and a first lower clamping roller. The upper filter cloth 8 passes between the first upper clamping roller and the first lower clamping roller and is clamped and limited by the first upper clamping roller and the first lower clamping roller. Through the clamping of the first upper clamping roller and the first lower clamping roller, not only can the stability of the upper filter cloth 8 during transportation and recovery be improved, but also the dry sludge adhered to the upper filter cloth 8 can be removed during the recovery process.

[0075] like Figure 1 As shown, the second conveying assembly 5 includes a second conveying drive device 510, a discharge roller 520 and a second limiting support roller group, wherein the second conveying drive device 510 includes a second drive motor 511 and a second drive roller 512, the second drive roller 512 is arranged at the drive end of the second drive motor 511, and the second drive roller 512 is used to wind the lower filter cloth 9.

[0076] The discharge roller 520 is arranged on the side of the second conveying drive device 510 away from the traction assembly 6. Its function is to flip the lower filter cloth 9 180° or approximately 180°, so that the dry sludge on the lower filter cloth 9 falls off during the flipping process to achieve sludge unloading.

[0077] The second position limiting support roller group includes a plurality of second position limiting support rollers 530 arranged in sequence from the discharge roller 520 to the traction assembly 6. The lower filter cloth 9 starts from the second drive roller 512 and flips over the discharge roller 520 and passes through each second position limiting support roller 530 in sequence before being connected with the traction assembly 6. The second position limiting support roller group can also include one or more spare second position limiting support rollers 530.

[0078] In order to ensure the stability of the lower filter cloth 9 during the transportation and recovery process, and to prevent the lower filter cloth 9 from carrying dry sludge and being recovered and wound onto the second drive roller 512, in one embodiment of the present application, the second conveying assembly 5 also includes a second clamping roller device 540, and the second clamping roller device 540 is arranged between the second conveying drive device 510 and the unloading roller 520. The second clamping roller device 540 includes a second upper clamping roller and a second lower clamping roller. The lower filter cloth 9 passes between the second upper clamping roller and the second lower clamping roller and is clamped and limited by the second upper clamping roller and the second lower clamping roller. Through the clamping of the second upper clamping roller and the second lower clamping roller, the stability of the lower filter cloth 9 during transportation and recovery can be improved, and the dry sludge adhered to the lower filter cloth 9 can also be removed during the recovery process.

[0079] To further optimize the above technical solution and improve the unloading effect, in one embodiment of the present application, the sludge filter press dewatering device also includes a dry mud shovel plate, which is arranged on one side of the unloading roller 520 and is gap-matched with the unloading roller 520. The gap between the dry mud shovel plate and the unloading roller 520 is adjustable to ensure that the dry sludge falls completely off from the lower filter cloth 9.

[0080] In order to ensure that the inclusion body is evenly stressed during the filtration process and obtain a better filtration effect, the sludge needs to be distributed more evenly on the lower filter cloth 9. To this end, in one embodiment of the present application, the sludge distribution device 2 also includes a sludge distribution plate 220. The sludge distribution plate 220 is arranged above the lower filter cloth 9. The sludge distribution plate 220 is used to scrape the sludge on the lower filter cloth 9 flat, so that the sludge is more evenly distributed in the width direction of the lower filter cloth 9, so that it can be more flat when it is zigzag stacked in the filter press cage 320.

[0081] To further optimize the above technical solution, the mud spreading plate 220 is arranged above the lower filter cloth 9 through a lifting and adjusting mechanism. The lifting and adjusting mechanism can adjust the position of the mud spreading plate 220 up and down, so that the mud spreading plate 220 can move closer to and away from the lower filter cloth 9. In this way, not only can the thickness of the sludge on the lower filter cloth 9 be adjusted during the mud spreading process, but also in the process of rewinding the lower filter cloth 9 after the filter pressing is completed, it can avoid the mud spreading plate 220 from scratching the dry sludge on the lower filter cloth 9, thereby causing the dry sludge to be scattered everywhere below the sludge filter pressing and dewatering device and cannot be collected.

[0082] It is not difficult to understand that when the mud plate 220 pushes the sludge on the lower filter cloth 9, the sludge will move from the middle position of the lower filter cloth 9 to the edge of the lower filter cloth 9, and there is a risk of falling from the edge of the lower filter cloth 9. Therefore, in one embodiment of the present application, the mud plate 220 includes a plate body and side baffles, wherein the plate body extends along the width direction of the lower filter cloth 9, that is, the plate body is perpendicular to the moving direction of the lower filter cloth 9, and the two side baffles are connected to the lower edges on both sides of the plate body, and the two side baffles extend along the moving direction of the lower filter cloth 9. An inverted U-shaped groove is formed between the plate body and the two side baffles for the lower filter cloth 9 to pass through. In this way, when the plate body pushes the sludge on the lower filter cloth 9, the side baffles on both sides can act as mud guards on both sides of the lower filter cloth 9 to prevent sludge from leaking from both sides of the lower filter cloth 9.

[0083] During the mud distribution process, if the mud distribution port of the mud distribution pipe 210 is fixed, the sludge distributed on the lower filter cloth 9 will be concentrated at a certain position of the lower filter cloth 9, thereby causing a certain position of the lower filter cloth 9 to bend excessively and sink during movement, affecting the stability of the lower filter cloth 9. Of course, this problem can be solved by setting multiple mud distribution ports in the mud distribution pipe 210, but when the mud distribution pipe 210 has only one mud distribution port, it is difficult to avoid the above problem. Therefore, in a preferred embodiment of the present application, the mud distribution port of the mud distribution pipe 210 is set above the lower filter cloth 9 through a translation adjustment mechanism, and the translation adjustment mechanism can drive the mud distribution port of the mud distribution pipe 210 to move back and forth along the width direction of the lower filter cloth 9, so that the sludge is distributed on the lower filter cloth 9 as evenly as possible, and the moving speed of the translation adjustment mechanism should match the travel speed of the lower filter cloth 9.

[0084] like Figure 1 As shown, the sludge filter press dewatering device also includes a track, and multiple filter press cages 320 can be movably arranged on the track between the standby pressure position and the filter press position. The traction assembly 6 is arranged above the standby pressure position, and the pressure device 310 is arranged above the filter press position. The movement of the filter press cage 320 on the track can be manually pushed or automatically driven by the filter press cage 320 driving device. Of course, it should be noted that along the extension direction of the track, a cleaning position can also be set on one side of the standby pressure position and the filter press position for cleaning the filter press cage 320.

[0085] Specifically, the filter press cage 320 first moves to the standby pressure position below the traction assembly 6, and loads the inclusion body consisting of the upper filter cloth 8, the lower filter cloth 9 and the sludge at the standby pressure position. After the loading is completed, it moves to the filter press position below the pressure device 310 for filtration. After the filtration is completed, the filter press cage 320 returns to the standby pressure position to realize the recovery of the filter cloth and the unloading of the dry sludge.

[0086] The track can be a straight track, a curved track or a circular track.

[0087] An ultrasonic cracking device 1, a sludge distribution device 2 and a filter cloth conveying device can be respectively arranged on both sides of the pressure device 310, and a filter press cage 320 can be respectively arranged on both sides of the pressure device 310, so that the filter press cages 320 on both sides of the pressure device 310 are alternately moved to the bottom of the pressure device 310 for filtration, thereby improving the sludge treatment efficiency.

[0088] like Figure 4 As shown, an embodiment of the present application also provides a sludge treatment system, which includes the sludge filter press and dewatering device as described in the above embodiment. Since the sludge treatment system includes the sludge filter press and dewatering device in the above embodiment, the technical effects of the sludge treatment system please refer to the above embodiment.

[0089] It should be noted that the sludge treatment system may include one or more sludge filter press dewatering devices. When the sludge treatment system includes multiple sludge filter press dewatering devices, each sludge filter press dewatering device is connected in parallel to the sludge output end of the sludge supply device of the sludge treatment system.

[0090] like Figure 4 As shown, the sludge supply device includes a sludge storage device, a chemical supply device and a mixing device, wherein the sludge storage device includes a sludge storage tank 11 and a first sludge conveying device 12, the sludge storage tank 11 is connected to the sludge conveying pipe 10, the sludge conveying pipe 10 conveys the sludge to the sludge storage tank 11, and the sludge storage tank 11 supplies the sludge to be treated to the downstream equipment through the first sludge conveying device 12.

[0091] Since the sludge filter press dewatering device in the embodiment of the present application integrates ultrasonic cracking treatment and vertical filter press treatment, the dehydration efficiency and effect are significantly improved. It is no longer necessary to add reagents to the sludge before filter press treatment. Therefore, the reagent supply device and the mixing device are not necessary and can be increased or decreased according to treatment requirements. The sludge supply device can be composed only of a sludge storage device, and the first sludge conveying device 12 is used to convey the sludge in the sludge storage tank 11 directly to the ultrasonic cracking device 1 of each sludge filter press dewatering device.

[0092] The reagent supply device includes a reagent container 14 and a reagent conveying device 15. The reagent supply device includes one or more reagent containers 14. The reagent container 14 stores dehydration reagents, lime, etc. for adding to the sludge. The reagent container 14 supplies reagents to downstream equipment through the reagent conveying device 15.

[0093] The mixing device is arranged downstream of the sludge feeding device and the drug feeding device. The mixing device includes a mixing device 13, a stirring device 16 and a second sludge conveying device 17. The feed end of the mixing device 13 is connected to the first sludge conveying device 12 and the drug conveying device 15 respectively to receive the sludge conveyed by the first sludge conveying device 12 and the drug conveying device 15. The sludge and the drug are preliminarily mixed in the mixing device 13.

[0094] The stirring device 16 includes a stirring container and a stirring assembly. The feed end of the stirring container is connected to the discharge end of the mixing device 13. The sludge and the agent after preliminary mixing enter the stirring container. The stirring assembly includes a stirring drive device and a stirring paddle extending into the stirring container. The stirring drive device drives the stirring paddle to rotate to fully stir the sludge and the agent in the stirring container, so that they are mixed and the sludge produces flocculent precipitation, thereby forming preliminary dehydration. After the agent and the sludge are fully reacted, the second sludge conveying device 17 conveys the generated precipitate to the ultrasonic cracking device 1 of the sludge filter press dehydration device in the above embodiment of the present application. After ultrasonic cracking, it enters the subsequent filter press process, and the upper filtrate in the stirring container can be discharged into the filtrate pool.

[0095] In the above embodiment, the first sludge conveying device 12 and the second sludge conveying device 17 are both screw pumps, and the drug conveying device 15 is a drug pump.

[0096] It can be foreseen that, in the process of rewinding the filter cloth after the filtration is completed, the lower filter cloth 9 is turned over by the discharge roller 520, so the dry sludge after filtration mainly falls off from the lower filter cloth 9 at the discharge roller 520. Figure 4 As shown, the sludge treatment system also includes a dry sludge collection system, which includes a first dry sludge conveying device 20, a second dry sludge conveying device 21, a third dry sludge conveying device 22 and a dry sludge container 23. The first end of the first dry sludge conveying device 20 is arranged below the discharge roller 520 of each sludge filter press dewatering device to receive the dry sludge dropped from the discharge roller 520. The second dry sludge conveying device 21 is arranged below the second end of each first dry sludge conveying device 20 to receive the dry sludge of each first dry sludge conveying device 20. The third dry sludge conveying device 22 connects the second dry sludge conveying device 21 with the dry sludge container 23, and is used to collect the dry sludge on the second dry sludge conveying device 21 into the dry sludge container 23.

[0097] When a certain amount of dry sludge is collected in the dry sludge container 23 , the dry sludge container 23 can be transported to the next treatment location using transportation equipment 24 , such as a car or a forklift, for subsequent treatment such as incineration or landfilling of the dry sludge.

[0098] As used in this application and the claims, unless the context clearly indicates an exception, the terms "a," "an," "an," and / or "the" are not intended to refer to the singular and may include the plural, unless the context clearly indicates otherwise. Generally speaking, the terms "comprises" and "include" only indicate the inclusion of the steps and elements specifically identified, and these steps and elements do not constitute an exclusive list. A method or apparatus may also include other steps or elements. The phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, product, or apparatus that includes the elements.

[0099] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0100] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0101] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the core ideas of the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A sludge filter press dewatering device, characterized in that: include: An ultrasonic cracking device (1) is used for performing ultrasonic cracking pretreatment on sludge; A mud distribution device (2) comprising a mud distribution pipe (210), the mud distribution pipe (210) being connected to the sludge outlet of the ultrasonic cracking device (1), and a mud distribution port being provided at one end of the mud distribution pipe (210) away from the ultrasonic cracking device (1); A filter press device (3) comprising a filter press cage (320) and a pressure device (310), wherein an inlet and an outlet are provided at the upper end of the filter press cage (320), the pressure device (310) is provided above the filter press cage (320), and a pressure-applying end of the pressure device (310) is used to enter the filter press cage (320) through the inlet and outlet for vertical filter pressing; The filter cloth conveying device comprises a first conveying assembly (4), a second conveying assembly (5) and a traction assembly (6), wherein the first conveying assembly (4) is used to convey the upper filter cloth (8) to the traction assembly (6) through the upper part of the mud cloth outlet, and the second conveying assembly (5) is used to convey the lower filter cloth (9) to the traction assembly (6) after receiving the sludge outputted from the mud cloth outlet through the lower part of the mud cloth outlet, and the traction assembly (6) is used to pull the upper filter cloth (8) and the lower filter cloth (9) to form an inclusion body in which the sludge is compacted and wrapped between the upper filter cloth (8) and the lower filter cloth (9), and the traction assembly (6) is reciprocally movably arranged above the filter press cage (320) to stack the inclusion body in a zigzag shape in the filter press cage (320).

2. The sludge filter press dewatering device according to claim 1, characterized in that: The traction assembly (6) comprises: A tractor, comprising a vehicle body (610) and a vehicle body (610) driving device, wherein the vehicle body (610) driving device is used to drive the vehicle body (610) to reciprocate relative to the filter press cage (320); a traction roller assembly (620) comprising an upper traction roller and a lower traction roller arranged in pairs, the upper traction roller being used to traction-drive the upper filter cloth (8), and the lower traction roller being used to traction-drive the lower filter cloth (9), a preset gap being provided between the upper traction roller and the lower traction roller so as to allow the inclusion to pass through and compact the sludge between the upper filter cloth (8) and the lower filter cloth (9); The traction roller driving device is connected to the upper traction roller and the lower traction roller in a transmission manner to drive the upper traction roller and the lower traction roller to rotate synchronously in opposite directions.

3. The sludge filter press dewatering device according to claim 2, characterized in that: The traction assembly (6) further comprises a filtrate funnel, the filtrate funnel being arranged on the vehicle body (610), the inlet of the filtrate funnel being located below the traction roller assembly (620), and the outlet of the filtrate funnel being in communication with a wastewater tank.

4. The sludge filter press dewatering device according to claim 2, characterized in that: The traction assembly (6) further comprises a position adjustment device, and the upper traction roller and / or the lower traction roller are adjustably arranged on the vehicle body (610) via the position adjustment device, so that the gap between the upper traction roller and the lower traction roller is adjustable.

5. The sludge filter press dewatering device according to claim 2, characterized in that: The vehicle body (610) driving device is a piston cylinder, or the vehicle body (610) driving device is a linear motor, or the vehicle body (610) driving device includes a rotary motor and a transmission mechanism.

6. The sludge filter press dewatering device according to any one of claims 1 to 5, characterized in that: The first conveying assembly (4) comprises: a first conveying drive device (410) comprising a first drive motor (411) and a first drive roller (412), wherein the first drive roller (412) is disposed at a drive end of the first drive motor (411), and the first drive roller (412) is used to wind the upper filter cloth (8); The first position-limiting support roller group comprises a plurality of first position-limiting support rollers (420) arranged in sequence from the first driving roller (412) to the traction assembly (6), at least one of the first position-limiting support rollers (420) being arranged in a staggered manner above and below the other first position-limiting support rollers (420), and the upper filter cloth (8) starting from the first driving roller (412) passes through each of the first position-limiting support rollers (420) in sequence and then engages with the traction assembly (6).

7. The sludge filter press dewatering device according to claim 6, characterized in that: The first conveying assembly (4) further comprises a first clamping roller device (430), the first clamping roller device (430) being arranged between the first conveying driving device (410) and the first position-limiting support roller group, the first clamping roller device (430) comprising a first upper clamping roller and a first lower clamping roller, the upper filter cloth (8) passing between the first upper clamping roller and the first lower clamping roller and being clamped and limited by the first upper clamping roller and the first lower clamping roller.

8. The sludge filter press dewatering device according to any one of claims 1 to 5, characterized in that: The second conveying assembly (5) comprises: a second conveying drive device (510), comprising a second drive motor (511) and a second drive roller (512), wherein the second drive roller (512) is arranged at a drive end of the second drive motor (511), and the second drive roller (512) is used to wind the lower filter cloth (9); a discharge roller (520) disposed on a side of the second conveying drive device (510) away from the traction assembly (6); The second position-limiting support roller group comprises a plurality of second position-limiting support rollers (530) sequentially arranged at intervals from the discharge roller (520) to the traction assembly (6); the lower filter cloth (9) starts from the second driving roller (512), passes through the discharge roller (520), turns over, and sequentially passes around each of the second position-limiting support rollers (530) before being engaged with the traction assembly (6).

9. The sludge filter press dewatering device according to claim 8, characterized in that: The second conveying assembly (5) further comprises a second clamping roller device (540), the second clamping roller device (540) being arranged between the second conveying drive device (510) and the discharge roller (520), the second clamping roller device (540) comprising a second upper clamping roller and a second lower clamping roller, the lower filter cloth (9) passing between the second upper clamping roller and the second lower clamping roller and being clamped and limited by the second upper clamping roller and the second lower clamping roller.

10. The sludge filter press dewatering device according to claim 8, characterized in that: The sludge filter press dewatering device further comprises a dry mud shovel plate, which is arranged on one side of the discharge roller (520) and is in clearance fit with the discharge roller (520).

11. The sludge filter press dewatering device according to any one of claims 1 to 5, characterized in that: The mud distribution device (2) further comprises a mud distribution plate (220), wherein the mud distribution plate (220) is arranged above the lower filter cloth (9), and the mud distribution plate (220) is used to scrape the mud on the lower filter cloth (9) flat.

12. The sludge filter press dewatering device according to any one of claims 1 to 5, characterized in that: The sludge filter press dewatering device further comprises a track, a plurality of filter press cages (320) are movably arranged on the track between a standby pressure position and a filter press position, the traction assembly (6) is arranged above the standby pressure position, and the pressure device (310) is arranged above the filter press position.

13. A sludge treatment system, characterized in that: It comprises the sludge filter press dewatering device as described in any one of claims 1 to 12.

Images