A mobile backflushing vehicle for backflushing filter dams and a method of using the same

Abstract

The present application belongs to the technical field of water treatment, and relates to a mobile backwashing vehicle for backwashing a filter dam and a use method thereof. The mobile backwashing vehicle comprises a vehicle body, a cylinder arranged in the vehicle body, a stirrer arranged in the cylinder, a liquid feeding pipe arranged on the side wall of the cylinder, a second connecting pipe and a third connecting pipe arranged on the top of the cylinder, wherein one end of the second connecting pipe penetrates through the top of the cylinder and extends into the cylinder, and the other end penetrates into a filter box; a plurality of filter plates are arranged along the height direction of the filter box, and a dynamic membrane assembly is arranged on each filter plate; the third connecting pipe extends upward from the top of the cylinder and penetrates through the outside of the vehicle body; a first connecting pipe and a slurry pipe are arranged at the bottom of the cylinder, wherein the first connecting pipe extends outward from the bottom of the cylinder and penetrates through the outside of the vehicle body, and the slurry pipe extends from the bottom of the cylinder into a drying machine. The present application breaks through the technical bottlenecks of low purification efficiency and difficult sludge disposal in traditional backwashing water treatment, and has the advantages of environmental friendliness and economic practicability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of water treatment, and relates to a mobile backwashing vehicle for backwashing filter dams and a use method thereof. BACKGROUND

[0002] In the process of urban river management, the backwashing process is widely used to remove river sediment and water pollutants. However, the wastewater produced after backwashing contains complex pollutants such as high-concentration suspended solids, colloids, dissolved organic matter and heavy metals, which need to be effectively treated.

[0003] Traditional technology usually uses simple sedimentation method to treat backwashing wastewater, and the separated sludge is directly composted, while the supernatant is directly discharged or reused in the backwashing system. However, this treatment method has obvious deficiencies. Traditional filtration technology mostly uses single physical interception (such as screen, sand filter) or chemical flocculation method, which is difficult to efficiently remove colloids, dissolved organic matter and heavy metal ions in wastewater, resulting in frequent replacement of filter core due to easy clogging, and chemical flocculation may introduce secondary pollution. In addition, the sludge after traditional solid-liquid separation has a water content of 80%~90%, which is bulky and has high transportation and disposal cost, and lacks effective resource utilization means, and can only be simply composted or landfilled, which easily causes environmental secondary pollution.

[0004] In terms of operation and maintenance, multi-stage physical filtration relies on frequent backwashing to maintain system flux, and chemical treatment requires continuous addition of reagents, resulting in significant increase in energy consumption and operation and maintenance cost. Chinese Patent No. CN119076482A discloses a mobile high-pressure water decontamination wastewater recycling system, which realizes partial wastewater reuse through multi-stage filtration (such as mechanical filtration, activated carbon adsorption), but still has problems of insufficient sludge reduction and lack of resource utilization, and the removal capacity of dissolved pollutants is limited, which is difficult to meet the high-standard water quality reuse demand.

[0005] Therefore, it is urgent to develop an efficient and low-cost backwashing water treatment technology that can deeply remove pollutants, realize sludge reduction and resource utilization, and reduce system operation cost to make up for the shortcomings of existing technologies. SUMMARY

[0006] The present application aims to solve the problems in the prior art and provide a mobile backwashing vehicle for backwashing filter dams and a use method thereof, which realizes deep treatment and recycling of backwashing water.

[0007] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] The first aspect, the present application provides a kind of mobile backwashing car for backwashing filter dam, including car body;The front end of the car body is provided with traction head, and the bottom is symmetrically provided with tire;The inside of the car body is provided with cylinder;The bottom of the cylinder is fixedly connected with the inner wall of the car body by support leg;Stirrer is arranged in the cylinder;Liquid feeding pipe is arranged on the side wall of the cylinder;Second connecting pipe and third connecting pipe are arranged on the top of the cylinder;One end of the second connecting pipe penetrates the top of the cylinder and extends into the cylinder, and the other end penetrates into the filter box;The filter box is provided with multiple layers of filter plates along its height direction, and each layer of filter plate is provided with dynamic membrane assembly;The third connecting pipe extends upward from the top of the cylinder and penetrates out of the car body;First connecting pipe and slurry pipe are arranged on the bottom of the cylinder;The first connecting pipe extends outward from the bottom of the cylinder and penetrates out of the car body;The slurry pipe extends into the drying machine from the bottom of the cylinder.

[0009] Preferably, the drying machine includes a frame and a housing;The frame is fixedly installed on the inner wall of the bottom of the car body, and the housing is sleeved on the frame;The top of the housing is provided with a feed inlet;The slurry pipe extends from the bottom of the cylinder into the feed inlet;Rotating rod is arranged along the length direction of the housing;The rotating rod penetrates the housing and is rotatably connected with both ends of the frame;One end of the frame is provided with a motor, and the output shaft of the motor is connected with one end of the rotating rod by a shaft coupling;

[0010] The first vertical plate, the second vertical plate and the third vertical plate are sequentially arranged in the housing;The first vertical plate and the third vertical plate are respectively arranged near both ends in the housing and are rotatably connected with the rotating rod;The second vertical plate is provided with a through hole, and the rotating rod penetrates the through hole and forms a gap with the inner wall of the through hole;

[0011] Spiral stirring blade is arranged on the section of the rotating rod between the second vertical plate and the third vertical plate;The diameter of the spiral stirring blade is gradually increased from the second vertical plate to the third vertical plate.

[0012] Preferably, a split conical sleeve is arranged between the second vertical plate and the third vertical plate;The split conical sleeve includes an upper split conical sleeve and a lower split conical sleeve;The upper split conical sleeve and the lower split conical sleeve form a containing space matched with the spiral stirring blade when they are combined;The upper split conical sleeve is in communication with the feed inlet.

[0013] Preferably, a plurality of water-permeable holes are uniformly arranged on the split conical sleeve.

[0014] Preferably, a water tank is arranged at the bottom of the frame, and the water tank is located below the split conical sleeve;The top of the water tank is provided with an open mouth, and the open mouth corresponds to the water-permeable hole.

[0015] Preferably, the water tank is provided with a sixth connecting pipe; the sixth connecting pipe is connected with the first connecting pipe.

[0016] Preferably, the second vertical plate is provided with a sliding plate on the side close to the first vertical plate; the rotating rod penetrates through the sliding plate; an electric cylinder is symmetrically arranged between the first vertical plate and the sliding plate; the fixed end of the electric cylinder is connected with the first vertical plate, and the telescopic end is connected with the sliding plate.

[0017] Preferably, the filter tank is provided with a fourth connecting pipe at the bottom; one end of the fourth connecting pipe is connected to the sidewall between the bottom of the filter tank and the lowermost filter plate, and the other end is connected to the water storage tank.

[0018] Preferably, the water storage tank is provided with a fifth connecting pipe at the bottom; one end of the fifth connecting pipe extends into the water storage tank, and the other end extends outward to the outside of the vehicle body.

[0019] In the second aspect, the application provides a use method of the mobile backwashing vehicle for backwashing filter dam, which comprises the following steps:

[0020] The backwashing water to be treated enters the cylinder through the first connecting pipe, and the chemical flocculating agent is injected into the cylinder through the liquid adding pipe to cause flocculation reaction, and the large particle pollutants formed by coagulation and sedimentation settle at the bottom of the cylinder to form sludge, and the backwashing water after flocculation and clarification is suspended above the sludge to form an upper clear liquid; the upper clear liquid overflows to the filter tank through the second connecting pipe, and the gas generated by the reaction is discharged out of the vehicle body through the third connecting pipe; the overflowed clear liquid passes through the multiple filter plates after entering the filter tank, and the dynamic membrane assembly on each filter plate traps residual particles and dissolved organic matter, and the filtrate is used as backwashing water.

[0021] Compared with the prior art, the application has the following beneficial effects:

[0022] The application breaks through the precision limitation of traditional single filtration through the cross-scale pollutant trapping technology of physical centrifugation, chemical coagulation and nano coating adsorption. Specifically, physical centrifugation is carried out through the cylinder, and chemical coagulation is carried out by adding reagents through the liquid adding pipe on the sidewall of the cylinder; the multiple filter plates and the dynamic membrane assembly in the filter tank efficiently trap pollutants with different particle sizes and properties, and realize deep filtration of backwashing water. The application effectively breaks through the technical bottleneck of insufficient purification efficiency in traditional backwashing water treatment, and has environmental friendliness and economic practicability.

[0023] Further, the present application realizes progressive extrusion dewatering of the mud by the gradually changing design of the diameter of the spiral stirring blade in the drier and the water-permeable hole structure of the split conical sleeve, and precisely controls the particle size of the extruded sludge by adjusting the distance between the sliding plates through the electric cylinder, so as to provide pretreatment conditions for subsequent microwave drying and pyrolysis gasification. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0025] Figure 1 It is a first perspective view of the mobile backwashing vehicle of the present application.

[0026] Figure 2 It is a second perspective view of the mobile backwashing vehicle of the present application.

[0027] Figure 3 It is a first perspective view of the inside of the vehicle body of the present application.

[0028] Figure 4 It is a second perspective view of the inside of the vehicle body of the present application.

[0029] Figure 5 It is a structural schematic view of the barrel of the present application.

[0030] Figure 6 It is a structural schematic view of the drier of the present application.

[0031] Figure 7 It is a schematic view of the inside of the drier of the present application.

[0032] Figure 8 It is a first perspective view of the inside of the drier of the present application after installing the split conical sleeve.

[0033] Figure 9 It is a second perspective view of the inside of the drier of the present application after installing the split conical sleeve.

[0034] Wherein: 1, the vehicle body; 2, the traction head; 3, the cylinder; 4, the first connecting pipe; 5, the lifting pump; 6, the liquid filling pipe; 7, the third flow valve; 8, the second connecting pipe; 9, the third connecting pipe; 10, the mud pipe; 11, the first electric valve; 12, the mud pump; 13, the first flow valve; 14, the second flow valve; 15, the filter box; 16, the fourth connecting pipe; 17, the third electric valve; 18, the water storage tank; 19, the fifth connecting pipe; 20, the fourth flow valve; 21, the high-pressure pump; 22, the quick release interface; 23, the frame body; 24, the shell; 25, the feed inlet; 26, the rotating rod; 27, the motor; 28, the first vertical plate; 29, the second vertical plate; 30, the third vertical plate; 31, the through hole; 32, the spiral stirring blade; 33, the split conical sleeve; 34, the water tank; 35, the sixth connecting pipe; 36, the second electric valve; 37, the sliding plate; 38, the electric cylinder. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following will be a clear and complete description of the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0037] It should be noted that: similar numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0038] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is used, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0039] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly inclined. As "horizontal" only means that it is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0040] In the description of the embodiments of the application, it should also be noted that, unless otherwise clearly specified and limited, if the terms "arrange", "mount", "connect", "connect" appear, they should be understood in a broad sense, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] The application will be described in further detail below with reference to the drawings:

[0042] The first object of the present application is to provide a mobile backwashing vehicle for backwashing filter dam, as shown in Figures 1-5 The vehicle body 1 is provided with a towing head 2 at the front end, and symmetrically arranged tires at the bottom; a cylinder 3 is arranged inside the vehicle body 1; the bottom of the cylinder 3 is fixedly connected with the inner wall of the vehicle body 1 through supporting legs; a stirrer is arranged inside the cylinder 3; a liquid adding pipe 6 is arranged on the side wall of the cylinder 3; a second connecting pipe 8 is arranged at the top of the cylinder 3; one end of the second connecting pipe 8 penetrates through the top of the cylinder 3 and extends into the cylinder 3, and the other end penetrates into a filter box 15; a plurality of filter plates are arranged along the height direction of the filter box 15, and a dynamic membrane assembly is arranged on each filter plate; a fourth connecting pipe 16 is arranged at the bottom of the filter box 15; one end of the fourth connecting pipe 16 is connected to the side wall between the bottom of the filter box 15 and the lowermost filter plate, and the other end is connected to a water storage tank 18; a fifth connecting pipe 19 is arranged at the bottom of the water storage tank 18; one end of the fifth connecting pipe 19 extends into the water storage tank 18, and the other end extends outward to the outside of the vehicle body 1.

[0043] The vehicle body 1 is a carrying platform of the whole system, the traction head 2 arranged at the front end of the vehicle body 1 enables the device to have the traction moving ability, the symmetrical tires arranged at the bottom of the vehicle body 1 ensure the transportation stability of the device, and the whole system can be quickly deployed to different work sites. In addition, the vehicle body 1 is provided with doors at the rear end or both sides, which is convenient for maintenance. The cylinder body 3 is a first-stage treatment unit, the bottom of the cylinder body 3 is a reverse cone, and the cylinder body 3 is stably installed in the vehicle body 1 through the support legs arranged at the bottom of the cylinder body 3. When the backwash water to be treated passes through the cylinder body 3, the stirrer stirs the backwash water to be treated, and the stirrer separates the large-particle suspended matter (>100 μm) by using the centrifugal force. The liquid adding pipe 6 arranged on the side wall of the cylinder body 3 is used for adding flocculants, and the backwash water to be treated and the flocculants are mixed to form the precipitate. The precipitate generated by the flocculation reaction precipitates along the side wall of the cylinder body 3 to the bottom of the cylinder body 3, the upper layer water overflowing the second connecting pipe 8 flows into the filter box 15, and the next step of treatment is performed. The first flow valve 13 is arranged on the second connecting pipe 8, the rate of the first flow valve 13 is controlled, and the opening degree of the first flow valve 13 is reduced to slow down the flow of the water in the cylinder body 3 to the filter box 15, and the time of the water in the cylinder body 3 to precipitate is increased. The filter box 15 is a second-stage treatment unit, a gradient filtration system is formed through the multiple layers of filter plates arranged in the height direction, and the dynamic membrane assembly arranged on each layer of filter plate can selectively intercept different particle size pollutants. The dynamic membrane assembly is composed of an activated carbon-nano-aluminum oxide composite coating filter element, a dynamic adsorption layer is formed, the surface is loaded with hydroxyl radical catalytic sites, and the dynamic membrane assembly has the physical interception and chemical adsorption functions, can intercept 1-10 μm particles and part of the dissolved organic matter. The water filtered through the multiple layers of filter plates is temporarily stored in the water storage tank 18 through the fourth connecting pipe 16 arranged at the bottom of the filter box 15, the third electric valve 17 is arranged on the fourth connecting pipe 16 to control whether to flow, and the third electric valve 17 is linked with the liquid level sensor. When the liquid level of the filter box 15 reaches 80%, the third electric valve 17 is automatically opened, the filtered liquid is pumped to the water storage tank 18 at a rate of 5 m 3 / h, the water stored in the water storage tank 18 is discharged through the fifth connecting pipe 19, and the water is used as the backwash water of the filter dam. The fourth flow valve 20 and the high-pressure pump 21 are sequentially arranged on the fifth connecting pipe 19, the high-pressure pump 21 is used for improving the pressure of the fifth connecting pipe 19 to promote the backwashing effect, and the fourth flow valve 20 is used for controlling the flow of the backwash water.

[0044] In one embodiment of the present application, the fifth connecting pipe 19 and the first connecting pipe 4 are provided with quick-release interfaces 22 at the ends extending out of the vehicle body 1, the quick-release interfaces 22 are convenient for being connected with the pipeline. When the backwash water to be treated needs to be treated, the quick-release interface 22 of the first connecting pipe 4 can be conveniently connected with the external water conveying pipeline to realize the rapid introduction of the water to be treated. When the backwash needs to be performed, the quick-release interface 22 of the fifth connecting pipe 19 can be connected with the pipeline of the filter dam to perform the backwash.

[0045] In one embodiment of the present application, the first connecting pipe 4 is provided with a lifting pump 5 near one end of the cylinder 3 and a second flow valve 14 away from the other end of the cylinder 3. The lifting pump 5 can effectively overcome the pipeline resistance during backwashing water delivery, ensuring that the water flow enters the cylinder 3 for treatment at a stable flow rate. The second flow valve 14 can control the rate of backwashing water addition, allowing the backwashing water to rise from the liquid level height in the cylinder 3 by gradual overflow. A third flow valve 7 is provided on the liquid addition pipe 6, which can adjust the flocculant dosage according to the real-time water quality changes of the backwashing water.

[0046] In one embodiment of the present application, the cylinder 3 side wall is also provided with a heating meter and an instrument panel. The heating meter detection end extends to a position near the bottom of the cylinder 3, and the instrument panel is used to display the temperature inside the cylinder 3. The heating meter can achieve all-around uniform heating of the reaction system, promote the mixing of the chemical flocculant with water, ensure that the flocculation reaction always occurs within the most suitable temperature range, and significantly improve the flocculation efficiency and sedimentation effect. The instrument panel monitors the temperature change inside the cylinder 3 in real time, providing precise process control basis for the operator, and avoiding the destruction of the floc caused by excessive temperature or the influence of reaction activity caused by low temperature. The heating meter uses an immersion type electric heating rod with a built-in temperature sensor (precision ±1℃), which detects the temperature and feeds back to the instrument panel in real time. In practice, the water temperature needs to be maintained at 30-40℃ (optimal flocculation temperature range).

[0047] The cylinder 3 top is also provided with a third connecting pipe 9, which extends upward from the top of the cylinder 3 to penetrate the vehicle body 1 outside. The third connecting pipe 9 is used to discharge the gas generated during the reaction in the cylinder 3, reducing the pressure inside the cylinder 3. A pressure sensor is provided at the top outlet of the third connecting pipe 9. When the pressure sensor detects that the pressure is >1.2bar, the exhaust valve on the third connecting pipe 9 is automatically opened to prevent the risk of pipe explosion.

[0048] The cylinder 3 bottom is provided with a first connecting pipe 4 and a slurry pipe 10. The first connecting pipe 4 extends outward from the bottom of the cylinder 3 to penetrate the vehicle body 1 outside. The slurry pipe 10 extends from the bottom of the cylinder 3 to the drying machine, and the first electric valve 11 and the slurry pump 12 are provided in sequence on the slurry pipe 10. The first connecting pipe 4 is used to introduce backwashing water for treatment, and can also be used as an emergency drainage channel, greatly improving the working condition adaptability of the equipment. The slurry pipe 10 realizes intelligent control of the sludge delivery process through the cooperation of the first electric valve 11 and the slurry pump 12.

[0049] As Figures 6-7As shown, the dryer comprises a frame body 23 and a shell 24; the frame body 23 is fixedly installed on the inner wall of the bottom of the vehicle body 1, and the shell 24 is sleeved on the frame body 23; the top of the shell 24 is provided with a feeding port 25; the sludge pipe 10 extends from the bottom of the cylinder body 3 to the feeding port 25; a rotating rod 26 is arranged along the length direction of the shell 24; the rotating rod 26 penetrates through the shell 24 and is rotationally connected with both ends of the frame body 23; a first vertical plate 28, a second vertical plate 29 and a third vertical plate 30 are sequentially arranged in the shell 24; the first vertical plate 28 and the third vertical plate 30 are respectively arranged near both ends in the shell 24 and are rotationally connected with the rotating rod 26; a through hole 31 is formed in the second vertical plate 29, the rotating rod 26 penetrates through the through hole 31 and forms a gap fit with the inner wall of the through hole 31; a spiral stirring blade 32 is arranged on the section of the rotating rod 26 between the second vertical plate 29 and the third vertical plate 30; the diameter of the spiral stirring blade 32 is gradually increased from the second vertical plate 29 to the third vertical plate 30. The rigid connection of the frame body 23 and the bottom of the vehicle body 1 ensures the overall stability of the equipment during movement and operation, and facilitates the overall transportation and installation positioning of the equipment. The shell 24 adopts a detachable sleeving design, which is convenient for daily maintenance and repair and can effectively prevent sludge overflow during treatment. The feeding port 25 arranged at the top of the shell 24 is seamlessly connected with the sludge pipe 10, realizing the continuous conveying of sludge from the cylinder body 3 to the dryer. The rotating rod 26 penetrates through the shell 24 and cooperates with the rotating connection structure at both ends of the frame body 23 to form a stable and reliable power transmission system. The three vertical plates arranged inside the shell 24 constitute a unique dehydration working cavity: the first vertical plate 28 and the third vertical plate 30 serve as end supports to ensure the running stability of the rotating rod 26; the through hole 31 of the second vertical plate 29 forms a precise gap fit with the rotating rod 26, which not only ensures the smooth passage of sludge but also creates an ideal extrusion dehydration space. The spiral stirring blade 32 adopts a gradually increasing diameter design. When the sludge moves from the second vertical plate 29 to the third vertical plate 30 under the pushing of the stirring blade, the pressure on the sludge continuously increases as the diameter of the stirring blade gradually increases, realizing gradual extrusion dehydration. This design can more effectively destroy the colloidal structure of sludge and release bound water.

[0050] A motor 27 is arranged at one end of the frame body 23, the output shaft of the motor 27 is connected with one end of the rotating rod 26 through a coupling, realizing the efficiency and reliability of power transmission; the flexible connection of the coupling effectively absorbs the vibration and impact during the operation of the motor 27, ensuring the stable operation of the spiral stirring blade 32.

[0051] As Figures 8-9As shown, a split conical sleeve 33 is arranged between the second vertical plate 29 and the third vertical plate 30, and the split conical sleeve 33 is uniformly provided with a plurality of water-permeable holes; the split conical sleeve 33 includes an upper split conical sleeve and a lower split conical sleeve; the upper split conical sleeve and the lower split conical sleeve are combined to form a containing space adapted to the spiral stirring blade 32; and the upper split conical sleeve is in communication with the feed inlet 25. The split conical sleeve 33 covers the spiral stirring blade 32 in a split-up and split-down combination, and the uniformly distributed water-permeable holes enable the squeezed water to be quickly discharged. The communication design of the upper split conical sleeve and the feed inlet 25 ensures that the sludge can uniformly enter the dewatering area, and the lower split conical sleeve provides stable support.

[0052] In an embodiment of the present application, the frame body 23 is provided at the bottom with a water tank 34, and the water tank 34 is located below the split conical sleeve 33; the top of the water tank 34 is provided with an open mouth, and the open mouth corresponds to the water-permeable holes. The water tank 34 can efficiently collect the water squeezed out during the drying process, and the water produced during the dewatering process can flow into the water tank 34 body by gravity through the open mouth. In addition, the water tank 34 is provided with a sixth connecting pipe 35; the sixth connecting pipe 35 and the first connecting pipe 4 are connected through a second electric valve 36, so that the water produced during the drying process can be reflowed into the cylinder 3 for treatment, realizing the recycling of water resources, avoiding the waste of water resources, and reducing the potential pollution of wastewater discharge to the environment. Not only improves the overall efficiency of the backwashing filter system, but also enhances its environmental protection and sustainability, has significant economic and environmental benefits.

[0053] The second vertical plate 29 is provided on one side close to the first vertical plate 28 with a sliding plate 37; the rotating rod 26 penetrates through the sliding plate 37; the first vertical plate 28 and the sliding plate 37 are symmetrically provided with an electric cylinder 38; the fixed end of the electric cylinder 38 is connected with the first vertical plate 28, and the telescopic end is connected with the sliding plate 37. The distance adjustment of the sliding plate 37 relative to the second vertical plate 29 can be realized through the control of the electric cylinder 38, so as to accurately control the gap size of the sludge extrusion channel, and meet the dewatering needs of sludge with different water contents; the symmetrically arranged electric cylinders 38 ensure the parallel movement of the sliding plate 37, avoiding the equipment eccentric wear caused by single-side stress. The bottom of the frame body 23 close to the second vertical plate 29 is provided with a conveyor belt, which facilitates the conveying of the dried sludge out for pyrolysis and drying treatment.

[0054] The second object of the present application is to provide a use method of the mobile backwashing vehicle for the backwashing filter dam, comprising the following steps:

[0055] The backwash water to be treated enters the cylinder 3 through the first connecting pipe 4, is stirred by the stirrer, and large-particle suspended matter (>100 μm) is separated by the centrifugal force of the stirrer; a chemical flocculating agent is added to the cylinder 3 through the liquid adding pipe 6, so that colloidal particles are aggregated into flocs; at the same time, the temperature of the water in the cylinder 3 can be raised by the heating meter, so as to promote the mixing of the chemical flocculating agent with the water, and finally form large-particle pollutants, which settle along the side wall of the cylinder 3 to the bottom of the cylinder 3 to form sludge, and the backwash water after flocculation and clarification is suspended above the sludge to form supernatant, the supernatant overflowing the height of the second connecting pipe 8 flows into the filter box 15, and the gas generated in the reaction is discharged out of the vehicle body 1 through the third connecting pipe 9; after the overflowed clear liquid enters the filter box 15, it passes through multiple layers of filter plates from top to bottom, and residual particles and dissolved organic matter are intercepted by the dynamic membrane assembly on each layer of filter plate, and after filtration, the filtered water is transported to the water storage tank 18 through the fourth connecting pipe 16 at the bottom of the filter box 15 for temporary storage, and is used as backwash water for the filter dam. When backwashing is needed, the backwash water stored in the water storage tank 18 can be used to backwash the filter dam by connecting the pipeline of the filter dam through the quick release connector 22 of the fifth connecting pipe 19.

[0056] The sludge deposited at the bottom of the cylinder 3 is transported to the drier through the slurry pipe 10 for deep dewatering and particle size regulation: when the slurry enters the feed inlet 25 through the slurry pipe 10, the motor 27 drives the spiral stirring blade 32 to rotate, and the slurry is progressively extruded and dewatered in the gradually expanding space, and the extruded water flows into the water tank 34 through the water-permeable hole, and the water stored in the water tank 34 is transported back to the cylinder 3 through the sixth connecting pipe 35 and the first connecting pipe 4 for treatment; the electric cylinder 38 adjusts the distance between the sliding plates 37 in real time to control the particle size of the dewatered sludge, and the dried sludge (moisture content ≤65%) is transported out by the conveyor belt for further pyrolysis and drying treatment.

[0057] The specific method of pyrolysis and drying treatment is: a microwave drying device (power 50kW, frequency 2450MHz) is externally connected to further reduce the moisture content of the sludge to 30%, or directly enters a pyrolysis furnace (temperature 500-800℃) to generate combustible gas (calorific value ≥5MJ / m 3 ) and biochar (adsorption rate ≥800m 2 / g).

[0058] In an embodiment of the present application, the diameter of the first connecting pipe 4 is 80mm, and the second flow valve 14 (electrically adjustable valve, accuracy ±2%) controls the water inlet rate (0-10m 3The liquid level of the cylinder 3 is gradually raised at a rate of 5 cm / min, and the supernatant is overflowed to the filter box 15 through the second connecting pipe 8 (diameter 60 mm), and the first flow valve 13 (a manual throttle valve) can adjust the overflow speed, so that the residence time of the backwashing water to be treated in the cylinder 3 is greater than or equal to 30 min, and the sedimentation efficiency is improved.

[0059] The present application realizes efficient removal of pollutants with different particle sizes in backwashing water through a three-stage treatment process of "cyclone centrifugation + chemical flocculation + dynamic membrane adsorption", the spiral extrusion dewatering greatly improves the sludge dewatering efficiency, the tire moving platform realizes rapid deployment and flexible operation, and a complete wastewater-sludge resource recycling system is constructed. The present application effectively breaks through the technical bottlenecks of insufficient purification efficiency and difficult sludge disposal in traditional backwashing water treatment, and has the advantages of environmental friendliness and economic practicability.

[0060] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A mobile backwash vehicle for backwashing a filter dam, characterized in that, The utility model provides a kind of mud dryer, including car body (1);The car body (1) front end is provided with traction head (2), and bottom is provided with tire symmetrically;The car body (1) inside is provided with cylinder (3);The bottom of the cylinder (3) is fixedly connected with the inner wall of the car body (1) by support leg;The cylinder (3) is provided with stirrer;The sidewall of the cylinder (3) is provided with liquid feeding pipe (6);The cylinder (3) top is provided with second connecting pipe (8) and third connecting pipe (9);The second connecting pipe (8) one end penetrates the top of the cylinder (3) and extends into the cylinder (3), and the other end penetrates into filter box (15);The filter box (15) is provided with multiple layers of filter plate along its height direction, and each layer of filter plate is provided with dynamic membrane assembly;The third connecting pipe (9) extends upward from the top of the cylinder (3) and penetrates outside the car body (1);The bottom of the cylinder (3) is provided with first connecting pipe (4) and mud pipe (10);The first connecting pipe (4) extends outward from the bottom of the cylinder (3) and penetrates outside the car body (1);The mud pipe (10) extends into drying machine from the bottom of the cylinder (3); The drying machine includes frame body (23) and shell (24);The frame body (23) is fixedly installed on the bottom inner wall of the car body (1), and the shell (24) is sleeved on the frame body (23);The top of the shell (24) is provided with feed inlet (25);The mud pipe (10) extends into the feed inlet (25) from the bottom of the cylinder (3);Rotating rod (26) is arranged along the length direction of the shell (24);The rotating rod (26) penetrates the shell (24) and is rotatably connected with both ends of the frame body (23);One end of the frame body (23) is provided with motor (27), and the output shaft of the motor (27) is connected with one end of the rotating rod (26) through a shaft coupling; The first vertical plate (28), the second vertical plate (29) and the third vertical plate (30) are sequentially arranged in the shell (24);The first vertical plate (28) and the third vertical plate (30) are respectively arranged near both ends in the shell (24) and are rotatably connected with the rotating rod (26);The second vertical plate (29) is provided with through hole (31), and the rotating rod (26) penetrates the through hole (31) and forms a gap with the inner wall of the through hole (31); The rotating rod (26) is provided with spiral stirring blade (32) on the section between the second vertical plate (29) and the third vertical plate (30);The diameter of the spiral stirring blade (32) is gradually expanded from the second vertical plate (29) to the third vertical plate (30); The second vertical plate (29) and the third vertical plate (30) are provided with split conical sleeve (33);The split conical sleeve (33) includes upper split conical sleeve and lower split conical sleeve;The upper split conical sleeve and the lower split conical sleeve form a containing space matched with the spiral stirring blade (32) after being combined;The upper split conical sleeve is communicated with the feed inlet (25). The split conical sleeve (33) is uniformly provided with a plurality of water-permeable holes.

2. A mobile backflushing vehicle for backflushing filter dams according to claim 1, characterized in that The frame body (23) is provided with a water tank (34) at the bottom, and the water tank (34) is located below the split conical sleeve (33); the top of the water tank (34) is provided with an open mouth, and the open mouth corresponds to the water-permeable hole.

3. A mobile backflushing vehicle for backflushing filter dams according to claim 2, characterized in that The water tank (34) is provided with a sixth connecting pipe (35); the sixth connecting pipe (35) is connected with the first connecting pipe (4).

4. A mobile backflushing vehicle for backflushing filter dams according to claim 1, characterized in that The second vertical plate (29) is provided with a sliding plate (37) on the side close to the first vertical plate (28); the rotating rod (26) penetrates through the sliding plate (37); the electric cylinder (38) is symmetrically arranged between the first vertical plate (28) and the sliding plate (37); the fixed end of the electric cylinder (38) is connected with the first vertical plate (28), and the telescopic end is connected with the sliding plate (37).

5. A mobile backflushing vehicle for backflushing filter dams according to claim 1, characterized in that The bottom of the filter box (15) is provided with a fourth connecting pipe (16); one end of the fourth connecting pipe (16) is connected to the sidewall position between the bottom of the filter box (15) and the lowermost filter plate, and the other end is connected to the water storage tank (18).

6. A mobile backflushing vehicle for backflushing filter dams according to claim 5, characterized in that The bottom of the water storage tank (18) is provided with a fifth connecting pipe (19); one end of the fifth connecting pipe (19) extends into the water storage tank (18), and the other end extends outward to the outside of the vehicle body (1).

7. A method for using a mobile backflushing vehicle for backflushing a filter dam, according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: The backwash water to be treated enters the cylinder (3) through the first connecting pipe (4), the chemical flocculant is injected into the cylinder (3) through the liquid adding pipe (6), the flocculation reaction occurs, the large particle pollutants in the coagulation are settled to the bottom of the cylinder (3) to form sludge, and the backwash water after flocculation and clarification is suspended above the sludge to form an upper clear liquid; the upper clear liquid overflows to the filter box (15) through the second connecting pipe (8), and the gas generated in the reaction is discharged out of the vehicle body (1) through the third connecting pipe (9); the overflowed clear liquid passes through the multiple filter plates after entering the filter box (15), and the dynamic membrane assembly on each filter plate traps residual particles and dissolved organic matter, and the filtrate is used as backwash water; the sludge deposited at the bottom of the cylinder (3) is transported to the drier for deep dewatering and particle size control through the slurry pipe (10).

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