A double-stage compression dewatering and filtering integrated device for river vessels

Abstract

This invention relates to the field of dredging machinery technology, specifically to an integrated device for two-stage compression, dewatering, and filtration of sludge for river vessels. The device includes a frame, a drive shaft, a mechanical dewatering component, a conveying component, and a pneumatic dewatering component. The drive shaft penetrates the frame, and the mechanical dewatering component is mounted on the drive shaft, forming a sealed flow channel. The conveying component is located at the left end of the mechanical dewatering component and penetrates the frame. When sludge enters the frame through the conveying component, it flows along the flow channel formed by the mechanical dewatering component. The pneumatic dewatering component is mounted on the drive shaft and supplies air to its interior. This invention, through the mechanical and pneumatic dewatering components, restricts and seals the flow path of the sludge during compression and dewatering, preventing sludge from flowing out and increasing the device load, while simultaneously achieving two-stage compression and dewatering of the sludge, effectively ensuring the treatment effect.

Description

Technical Field

[0001] This invention relates to the field of dredging machinery technology, specifically to an integrated device for dual-stage compression, dewatering, and filtration of silt used on riverboats. Background Technology

[0002] The water quality of urban rivers is an important indicator of the urban environment. Due to the generally slow flow rate and the accumulation of pollutants, silt will accumulate and affect the water quality. Therefore, silt dewatering machines and other dredging machinery are often used to dewater, dry or concentrate the silt.

[0003] Commonly used sludge dewatering machines include screw press dewatering machines, which utilize a screw to drive a shaft for dewatering and concentration. However, conventional screw press dewatering machines only have one screw conveyor with a fixed compression ratio. When the sludge content in the wastewater is high, insufficient dewatering can occur, affecting the treatment effect. Conversely, when the sludge content is low, over-dewatering can occur, damaging the dewatering machine. To address these issues, existing technology offers a better solution. By coaxially mounting two helical blades on a single drive shaft, with one blade stationary and the other moving, the distance between the two variable-diameter blades is adaptively adjusted based on the sludge's moisture content. This automatically changes the compression ratio of the screw conveyor, ensuring effective sludge treatment while preventing over-dewatering and equipment damage due to low sludge moisture content. However, the following defects still exist: because the sludge contains a lot of water and is in a fluid state, and there is a gap between the spiral blades and the shaft that move along the auger axis, the pressure generated when the sludge is compressed and dewatered will force the sludge to flow out from the gap between the spiral blades and the shaft. As the device continues to work, some sludge will accumulate on the outer surface of the spiral blades and solidify, increasing the load on the entire device. Another part of the sludge will flow out directly and cause secondary pollution, which will also affect the dewatering effect.

[0004] Therefore, in order to solve the above problems, an integrated device for two-stage compression dewatering and filtration of silt for river vessels is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated two-stage compression, dewatering, and filtration device for riverboats, which solves the problem that sludge flowing out from the gap between the spiral blades and the shaft not only increases the load on the entire device but also causes secondary pollution, affecting the treatment effect. By incorporating mechanical and pneumatic dewatering components, the flow path of the sludge during compression and dewatering is restricted and sealed, preventing sludge from flowing out and increasing the device load while simultaneously achieving two-stage compression and dewatering of the sludge, effectively ensuring the treatment effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An integrated dual-stage compression dewatering and filtration device for riverboat sludge includes a frame, a drive shaft, a mechanical dewatering component, a conveying component, and a pneumatic dewatering component. The drive shaft passes through the frame, the mechanical dewatering component is mounted on the drive shaft and forms a sealed flow channel, and the conveying component is located at the left end of the mechanical dewatering component and passes through the frame. When the sludge enters the frame through the conveying component, it flows along the flow channel formed by the mechanical dewatering component. The pneumatic dewatering component is mounted on the drive shaft and supplies air to the drive shaft. When the air is blown out from the pneumatic dewatering component, it impacts the sludge flowing in the flow channel. When the drive shaft is powered on, it drives the mechanical dewatering component and the pneumatic dewatering component to rotate synchronously and perform dual compression dewatering on the sludge.

[0008] Preferably, the mechanical dewatering assembly includes a first spiral blade, a second spiral blade, a spiral partition, a sealing film, an elastic plate, and a connecting assembly. The first spiral blade, the second spiral blade, and the spiral partition are all disposed on the drive shaft, with the spiral partition disposed between the first spiral blade and the second spiral blade. The sealing film is spirally wound on the drive shaft and fixedly disposed between the spiral partition and the second spiral blade. The elastic plate is disposed on one side of the drive shaft and connected to the ends of the first and second spiral blades. The connecting assembly is disposed outside the flow channel and connected to the first and second spiral blades.

[0009] By adopting the above scheme, the sludge can be squeezed and compressed after entering the interior of the guide channel as the first and second spiral blades rotate, thus achieving the effect of compressing and dewatering the sludge. Furthermore, the guide channel can be sealed by the sealing film and elastic plate to prevent sludge from entering the gap between the second spiral blade and the drive shaft. This will not increase the load on the entire device or cause secondary pollution, effectively ensuring the dewatering effect.

[0010] Preferably, the conveying assembly includes a hollow column, a guide tube, and a conveying tube. The hollow column is rotatably disposed at the end of the frame, the drive shaft is fixedly disposed at one end of the hollow column, the guide tube passes through the hollow column and the spiral blade and extends into the guide channel, and the conveying tube is rotatably disposed at the other end of the hollow column and passes through the interior of the hollow column.

[0011] By adopting the above scheme, the sludge to be compressed and dewatered can be completely transported into the sealed channel formed by the first and second spiral blades under the action of the guide pipe, avoiding the leakage of sludge to the outside of the guide channel and affecting the normal rotation of the second spiral blade. At the same time, the sludge transport process will not be affected while ensuring that the drive shaft can rotate normally.

[0012] Preferably, the pneumatic dehydration assembly includes a sleeve, a tube, an air inlet pipe, a U-shaped rod, and a one-way valve. The drive shaft has a blind hole inside. The sleeve is coaxially disposed at one end of the drive shaft. The tube is disposed between the drive shaft and the sleeve. The air inlet pipe passes through the tube. The U-shaped rod is disposed inside the tube and its two ends are respectively connected to the drive shaft and the sleeve. The one-way valve is disposed on the drive shaft and connects the blind hole and the flow guide channel.

[0013] By adopting the above scheme, gas can be transported into the guide channel through a one-way valve while mechanical pressure dewatering is performed. After entering the guide channel, the gas overflows and uses air pressure to assist in the discharge of water from the sludge, thus achieving a two-stage dewatering effect on the sludge and further ensuring the dewatering effect.

[0014] Preferably, the connecting assembly includes a mounting block and a synchronizing rod. Two mounting blocks are provided, which are coaxial and respectively disposed on the first and second helical blades. The synchronizing rod is fixedly disposed between the two mounting blocks and is an elastic telescopic rod.

[0015] By adopting the above scheme, the synchronous rotation of spiral blade one and spiral blade two can be achieved. When the water content of the sludge entering the guide channel changes, the distance between spiral blade one and spiral blade two can be adaptively adjusted by the elastic deformation of the synchronous rod, thereby ensuring the dewatering effect while avoiding excessive dewatering that could damage the equipment.

[0016] Preferably, multiple one-way valves are arranged on the surface of the drive shaft along the helical direction of the first helical blade, and the diameter of the one-way valves decreases from left to right.

[0017] It is known that during the compression and dewatering process of sludge, the particles in the sludge will settle under their own gravity, resulting in uneven distribution of the sludge during compression, thus affecting the dewatering effect. Therefore, this solution is adopted. By adopting the above solution, most of the high-temperature gas entering the blind hole will enter the guide channel from the left end of the drive shaft through the corresponding one-way valve. Since the sludge near the left end of the drive shaft has a higher water content and greater fluidity, most of the gas can impact the sludge when entering the guide channel, preventing the high-water-content sludge inside the guide channel from settling. This allows the sludge to be evenly distributed in the guide channel as it moves towards the right end of the drive shaft and gradually dewaters, thereby ensuring the dewatering effect.

[0018] Preferably, the length of the first spiral blade is greater than the length of the second spiral blade, the right end of the first spiral blade extends to the outside of the frame, and both the first and second spiral blades are provided with turbulence grooves on the side facing the flow channel, and the bottom of the turbulence grooves is set at an acute angle.

[0019] By adopting the above scheme, the sludge after compression and dewatering can gradually loosen after separating from the end of the second spiral blade, so that the dried sludge can be discharged smoothly. Under the action of the turbulence channel, when the first and second spiral blades rotate, the sinking sludge can be turned up, thereby avoiding the sludge from settling. This allows the sludge inside the guide channel to be uniformly compressed under the action of the first and second spiral blades, thus ensuring the dewatering effect.

[0020] Preferably, the drive shaft is a heat-conducting shaft, and the diameter of the blind holes inside the drive shaft increases from left to right.

[0021] By adopting the above scheme, the high-temperature gas delivered into the blind hole can transfer heat to the drive shaft through thermal conduction. Since the drive shaft is a heat-conducting shaft and the diameter of the blind hole inside increases from left to right, most of the heat in the high-temperature gas will accumulate at the right end of the drive shaft, thereby enabling concentrated heating treatment of the sludge at the end of the compression, achieving a further dewatering effect on the sludge.

[0022] Preferably, the spiral partition has multiple turbulence holes along the spiral direction, and the axis of the turbulence holes is parallel to the axis of the drive shaft.

[0023] By adopting the above scheme, when the sludge flows in a spiral direction inside the guide channel, a small portion of the sludge will pass through the turbulence hole along the axis of the drive shaft, thereby interfering with the flow path of some of the sludge. This causes the sludge to collide inside itself when flowing inside the guide channel, further preventing the sludge from settling and ensuring the sludge dewatering efficiency.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. The mechanical dewatering component forms a sealed flow channel, allowing the sludge to flow within the sealed channel during compression and dewatering, preventing leakage. Simultaneously, the pneumatic dewatering component delivers high-temperature gas into the sealed flow channel during dewatering. The pressure difference, combined with the mechanical dewatering component, enables two-stage compression and dewatering of the sludge during its flow, effectively ensuring the dewatering effect.

[0026] 2. The air pressure dewatering component not only uses air pressure difference to assist in dewatering the sludge, but also impacts the sludge the moment air enters the guide channel. In addition, the turbulence grooves on the surfaces of the first and second spiral blades agitate the flowing sludge, causing the sludge that has settled due to its own gravity to turn upwards. This ensures that the sludge is evenly compressed when it is transported to the ends of the first and second spiral blades, thereby ensuring the dewatering effect.

[0027] 3. By using the pneumatic dehydration component and the blind hole inside the drive shaft, the heat in the high-temperature gas can be transferred by the change in the wall thickness of the drive shaft and the heat conduction effect. This allows most of the heat in the high-temperature gas to accumulate at the right end of the drive shaft, achieving the effect of heating the right end of the drive shaft. This facilitates the evaporation of the sludge that has been compressed, dehydrated, and transported to the right end, further ensuring the dehydration effect. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0030] Figure 3 This is a schematic diagram of the connection structure between the drive shaft and the mechanical dehydration assembly of the present invention;

[0031] Figure 4 This is a schematic diagram of the connection structure between the drive shaft, the mechanical dehydration assembly, and the conveying assembly of the present invention;

[0032] Figure 5 This is a schematic diagram of the connection structure between the drive shaft, the mechanical dehydration assembly, and the pneumatic dehydration assembly of the present invention.

[0033] Figure 6 For the present invention Figure 3 A magnified view of part A in the middle section;

[0034] Figure 7 This is a schematic cross-sectional view of the drive shaft of the present invention.

[0035] Figure 8 This is a diagram showing the positional relationship between the first and second spiral blades, the spiral partition, and the sealing sheet of the present invention.

[0036] In the picture:

[0037] 1. Frame; 2. Drive shaft; 21. Blind hole; 3. Mechanical dewatering assembly; 31. Spiral blade one; 32. Spiral blade two; 33. Spiral baffle; 331. Turbulence hole; 34. Sealing film; 35. Elastic plate; 36. Connecting assembly; 361. Mounting block; 362. Synchronizing rod; 37. Turbulence groove; 4. Conveying assembly; 41. Hollow column; 42. Guide pipe; 43. Conveying pipe; 5. Pneumatic dewatering assembly; 51. Sleeve; 52. Tubing; 53. Air inlet pipe; 54. U-shaped rod; 55. One-way valve; 6. Guide channel. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Please see Figures 1 to 8 This invention provides an integrated two-stage compression, dewatering, and filtration device for riverboat silt, the technical solution of which is as follows:

[0040] For details, please refer to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6A dual-stage compression dewatering and filtration integrated device for riverboat sludge includes a frame 1, a drive shaft 2, a mechanical dewatering assembly 3, a conveying assembly 4, and a pneumatic dewatering assembly 5. The drive shaft 2 passes through the frame 1. The mechanical dewatering assembly 3 is mounted on the drive shaft 2 and forms a sealed flow channel 6. This sealed flow channel 6 is used to contain the sludge to be compressed and dewatered. The mechanical dewatering assembly 3 includes a first spiral blade 31, a second spiral blade 32, a spiral baffle 33, a sealing film 34, an elastic plate 35, and a connecting assembly 36. The first spiral blade 31, the second spiral blade 32, and the spiral baffle 33 are all equipped with... The spiral partition 33 is positioned on the drive shaft 2 and is located between the first spiral blade 31 and the second spiral blade 32. The first spiral blade 31 is fixedly mounted on the drive shaft 2, while the second spiral blade 32 is movably mounted on the drive shaft 2. The pitch of the first spiral blade 31 and the second spiral blade 32 gradually decreases from left to right. The spiral partition 33 is fixedly mounted on the drive shaft 2 to rotate synchronously with it. Multiple turbulence holes 331 are formed along the spiral direction on the spiral partition 33. The axis of the turbulence holes 331 is parallel to the axis of the drive shaft 2. The turbulence holes 331 are distributed on the left third of the spiral partition 33. In the second area, to prevent excessive sludge from clogging the turbulence hole 331, a sealing film 34 is spirally wound around the drive shaft 2 and fixedly positioned between the spiral partition 33 and the second spiral blade 32. An elastic plate 35 is positioned on one side of the drive shaft 2 and connected to the ends of the first spiral blade 31 and the second spiral blade 32. This elastic plate 35 can be made of rubber and is connected to the first spiral blade 31 and the second spiral blade 32 by vulcanization. This allows the distance between the first spiral blade 31 and the second spiral blade 32 to change while sealing the inlet end face of the guide channel 6, preventing sludge from entering the guide channel. The sludge inside channel 6 flows out from the left ends of spiral blade 31 and spiral blade 32. The sealing sheet 34 is a flexible rubber sheet with a rectangular cross-section. By slotting the surfaces of spiral partition 33 and spiral blade 32, the side of the sealing sheet 34 can be embedded and connected to spiral partition 33 and spiral blade 32 by vulcanization bonding, thereby achieving a seal between spiral blade 32 and drive shaft 2. When the equipment is working, the pressure of the sludge acts on the sealing sheet 34, making it tightly adhere to the outer surface of drive shaft 2, forming an effective dynamic seal to prevent sludge leakage.

[0041] The connecting component 36 is located outside the flow channel 6 and connected to the first spiral blade 31 and the second spiral blade 32. The connecting component 36 includes a mounting block 361 and a synchronizing rod 362. There are two mounting blocks 361, which are coaxial and respectively located on the first spiral blade 31 and the second spiral blade 32. The synchronizing rod 362 is fixedly located between the two mounting blocks 361. The synchronizing rod 362 is an elastic telescopic rod (that is, a spring is coaxially and movably sleeved on the outside of a normal telescopic rod. When it is compressed, the spring is energized. When the compression is released, the spring drives the telescopic rod to return to its original position through its own elastic force).

[0042] Under the above-mentioned conditions, the drive shaft 2 rotates, and during the rotation of the drive shaft 2, the sludge is transported between the first spiral blade 31 and the second spiral blade 32. Under the action of the sealing film 34, the gap between the second spiral blade 32 and the drive shaft 2 can be sealed, preventing the sludge from leaking from the gap between the second spiral blade 32 and the drive shaft 2. When the compression and dewatering work is performed, the drive shaft 2 is started, and the drive shaft 2 drives the first spiral blade 31 to rotate synchronously. When the first spiral blade 31 rotates, the second spiral blade 32 is driven to rotate synchronously through the synchronous action of the synchronous rod 362. The sludge will flow to the right end inside the guide channel 6 and be gradually compressed and dewatered. When the water content in the sludge is relatively high... When the water pressure is high, the amount of sludge entering the guide channel 6 per unit time will increase because the density of water is less than that of solid matter in the sludge. The water pressure will squeeze the side walls of the first spiral blade 31 and the second spiral blade 32, thus widening the left end of the guide channel 6 and gradually reducing the right end of the guide channel 6. This increases the compression ratio and effectively ensures the dewatering effect. When the water content in the sludge is low, the amount of sludge entering the guide channel 6 per unit time will decrease. The synchronizing rod 362 will reset under its own elasticity and squeeze the second spiral blade 32, thereby reducing the left end of the guide channel 6 and reducing the compression ratio, thus avoiding excessive dewatering and equipment damage.

[0043] As one embodiment of the present invention, refer to Figure 2 and Figure 4 The conveying assembly 4 is located at the left end of the mechanical dewatering assembly 3 and passes through the frame 1. The conveying assembly 4 includes a hollow column 41, a guide pipe 42, and a conveying pipe 43. The hollow column 41 is rotatably located at the end of the frame 1, and the drive shaft 2 is fixedly located at one end of the hollow column 41. The guide pipe 42 passes through the hollow column 41 and the spiral blade 31 and extends into the guide channel 6. The conveying pipe 43 is rotatably located at the other end of the hollow column 41 and passes through the interior of the hollow column 41. The conveying pipe 43 can be fixedly connected to the frame 1 through the mounting bracket to prevent the conveying pipe 43 from swinging.

[0044] Under the above-mentioned conditions, the pre-filtered sludge is conveyed through the conveying pipe 43 into the hollow column 41. The sludge entering the hollow column 41 will enter the guide channel 6 under the action of the guide pipe 42, thus preventing sludge leakage and secondary pollution to the sludge after subsequent compression and dewatering. The hollow column 41 and the frame 1, as well as the conveying pipe 43 and the hollow column 41, are rotatably connected by sealed bearings. Under the premise that the drive shaft 2 can rotate normally, sludge leakage between the hollow column 41 and the frame 1, and between the conveying pipe 43 and the hollow column 41 is prevented.

[0045] As one embodiment of the present invention, refer to Figure 2 , Figure 5 and Figure 7The pneumatic dehydration assembly 5 is mounted on the drive shaft 2 and supplies air to the interior of the drive shaft 2. The pneumatic dehydration assembly 5 includes a sleeve 51, a tube 52, an air inlet pipe 53, a U-shaped rod 54, and a one-way valve 55. A blind hole 21 is provided inside the drive shaft 2. The sleeve 51 is coaxially mounted at one end of the drive shaft 2. The tube 52 is positioned between the drive shaft 2 and the sleeve 51. The air inlet pipe 53 passes through the tube 52. The U-shaped rod 54 is located inside the tube 52 and its two ends are connected to the drive shaft 2 and the sleeve 51, respectively. The sleeve 51 can be driven by a motor, and during the rotation of the sleeve 51, it can utilize… The drive shaft 2 is rotated by the connection of the U-shaped rod 54 to ensure the normal operation of the mechanical dehydration component 3. The sleeve 52 and the drive shaft 2, as well as the sleeve 52 and the sleeve 51, can also be rotated by sealed bearings to avoid air leakage at the connection. The one-way valve 55 is set on the drive shaft 2 and connects the blind hole 21 and the guide channel 6. Multiple one-way valves 55 are set on the surface of the drive shaft 2 along the spiral direction of the spiral blade 31. The diameter of the one-way valve 55 decreases from left to right. The drive shaft 2 is a heat-conducting shaft, and the diameter of the blind hole 21 inside the drive shaft 2 increases from left to right.

[0046] Under the above-mentioned conditions, when the drive shaft 2 drives the first spiral blade 31 and the second spiral blade 32 to rotate for mechanical compression and dehydration, high-temperature air is delivered to the inside of the sleeve 52 and the blind hole 21 through the air inlet pipe 53. After entering the sleeve 52, the high-temperature air diffuses inside the sleeve 52 and is delivered to different areas inside the guide channel 6 through the corresponding one-way valves 55. As the drive shaft 2 rotates continuously, it drives the multiple one-way valves 55 installed on it to rotate continuously, so that the high-temperature gas is ejected from the one-way valves 55 and the spray range expands with the rotation of the drive shaft 2. On the one hand, it can help the high-temperature air to enter the guide channel 6 and assist the sludge in compression and dehydration under the action of air pressure; on the other hand, it can... The impact force of high-temperature air sprayed from the one-way valve 55 into the guide channel 6 is used to diffuse the sludge inside the guide channel 6, preventing the sludge from settling. This ensures that the sludge in the guide channel 6 can be uniformly compressed, thereby ensuring the dewatering effect. Since the drive shaft 2 is a heat-conducting shaft, the high-temperature gas will transfer heat to the drive shaft 2 through heat conduction after entering the blind hole 21. Because the high-temperature gas enters from the right end of the blind hole 21, and the diameter of the blind hole 21 increases from left to right, most of the heat in the high-temperature gas will be transferred to the right end of the spiral blade 31 and the spiral blade 32, thereby achieving further dewatering of the compressed sludge and effectively ensuring the dewatering effect.

[0047] As one embodiment of the present invention, refer to Figure 2 , Figure 3 , Figure 5 and Figure 8The length of the first spiral blade 31 is greater than the length of the second spiral blade 32. The right end of the first spiral blade 31 extends to the outside of the frame 1. Both the first spiral blade 31 and the second spiral blade 32 are provided with a turbulence groove 37 on the side facing the guide channel 6. The bottom of the turbulence groove 37 is set at an acute angle. The length of the turbulence groove 37 is less than or equal to two-thirds of the length of the first spiral blade 31. The depth of the turbulence groove 37 decreases from left to right along the spiral direction of the first spiral blade 31, so as to avoid the accumulation of silt with low water content in the interior of the turbulence groove 37 and affect the normal discharge of silt.

[0048] Under the above-mentioned conditions, when the drive shaft 2 drives the first spiral blade 31 and the second spiral blade 32 to rotate, some sludge will accumulate inside the turbulence channel 37. As the first spiral blade 31 and the second spiral blade 32 rotate, the sludge accumulated in the turbulence channel 37 can be turned upwards. The sludge turned upwards falls under its own gravity. Since the sludge is in a continuous flow process, it can impact the falling sludge, thereby further preventing the sludge from settling and effectively ensuring the uniform compression treatment of the sludge, thus ensuring the dewatering effect.

[0049] Working principle:

[0050] The sleeve 51 is driven to rotate by an external motor. When the sleeve 51 rotates, the drive shaft 2 is driven to rotate by the connection of the U-shaped rod 54. When the drive shaft 2 rotates, the first spiral blade 31 rotates. When the first spiral blade 31 rotates, the second spiral blade 32 rotates synchronously by the connection of the synchronous rod 362. At this time, the sludge that has been preliminarily filtered is transported to the interior of the hollow column 41 through the conveying pipe 43. As the sludge is continuously transported, the sludge in the hollow column 41 enters the guide channel 6 formed by the first spiral blade 31 and the second spiral blade 32 through the guide pipe 42. As the drive shaft 2 continues to rotate, the sludge in the guide channel 6 moves continuously to the right along the spiral direction. Since the pitch of the first spiral blade 31 and the second spiral blade 32 decreases from left to right, the sludge will be continuously compressed and dehydrated when it moves to the right. The dehydrated sludge is discharged from the right end of the frame 1 under the action of the first spiral blade 31.

[0051] While conveying sludge into the guide channel 6 through the conveying pipe 43 and the guide pipe 42, high-temperature gas is conveyed into the casing 52 through the air inlet pipe 53. After entering the casing 52, the high-temperature gas flows into the blind hole 21. The gas in the blind hole 21 will enter different areas of the guide channel 6 through the corresponding one-way valve 55. When entering the guide channel 6, it will impact the sludge in the guide channel 6 under the action of the airflow. In conjunction with the turbulence grooves 37 opened on the surface of the first spiral blade 31 and the second spiral blade 32 and the turbulence holes 331 opened on the spiral baffle 33, the sludge in the guide channel 6 is stirred to prevent the sludge from settling. This allows the solids in the sludge to be evenly dispersed, so as to ensure that the first spiral blade 31 and the second spiral blade 32 can evenly compress and dehydrate the sludge, effectively ensuring the dehydration effect.

[0052] As the air content in the guide channel 6 gradually increases, the air pressure in the guide channel 6 will also increase. Under the action of air pressure, the sludge in the guide channel 6 can be dehydrated, realizing the two-stage compression dehydration treatment of the sludge, which further ensures the dehydration effect. The heat in the high-temperature gas will be transferred through the drive shaft 2 to heat the sludge. Since the diameter of the blind hole 21 inside the drive shaft 2 increases from left to right, that is, the wall thickness of the drive shaft 2 decreases from left to right, most of the heat in the high-temperature gas will be concentrated at the right end of the spiral blade 31 and the spiral blade 32 to evaporate the sludge transported to the right end of the spiral blade 31, which further ensures the dehydration effect.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated two-stage compression dewatering and filtration device for riverboat silt, comprising a frame, characterized in that: It also includes a drive shaft, a mechanical dewatering assembly, a conveying assembly, and a pneumatic dewatering assembly. The drive shaft runs through the frame. The mechanical dewatering assembly is mounted on the drive shaft and forms a sealed flow channel. The conveying assembly is located at the left end of the mechanical dewatering assembly and runs through the frame. When the sludge enters the frame through the conveying assembly, it flows along the flow channel formed by the mechanical dewatering assembly. The pneumatic dewatering assembly is mounted on the drive shaft and supplies air to the drive shaft. When the air is blown out from the pneumatic dewatering assembly, it impacts the sludge flowing in the flow channel. When the drive shaft is powered on, it drives the mechanical dewatering assembly and the pneumatic dewatering assembly to rotate synchronously and perform double compression dewatering on the sludge. The mechanical dewatering assembly includes a first spiral blade, a second spiral blade, a spiral partition, a sealing film, an elastic plate, and a connecting assembly. The first spiral blade, the second spiral blade, and the spiral partition are all mounted on the drive shaft, with the spiral partition positioned between the first and second spiral blades. The sealing film is spirally wound around the drive shaft and fixedly positioned between the spiral partition and the second spiral blade. The elastic plate is located on one side of the drive shaft and connected to the ends of the first and second spiral blades. The connecting assembly is located outside the flow channel and connected to the first and second spiral blades. By slotting the surfaces of the spiral partition and the second spiral blade, the side of the sealing film is embedded and connected to the spiral partition and the second spiral blade by vulcanization. When the equipment is working, the pressure of the sludge acts on the sealing film, making it fit tightly against the outer surface of the drive shaft, forming an effective dynamic seal. The drive shaft has a blind hole inside, and the pneumatic dehydration assembly includes a one-way valve. The one-way valve is disposed on the drive shaft and connects the blind hole and the flow guide channel. Multiple one-way valves are arranged on the surface of the drive shaft along the spiral direction of the first spiral blade, and the diameter of the one-way valves decreases from left to right. The drive shaft is a heat-conducting shaft, and the diameter of the blind holes inside the drive shaft increases from left to right. The spiral partition has multiple turbulence holes along the spiral direction, and the axis of the turbulence holes is parallel to the axis of the drive shaft.

2. The integrated dual-stage compression dewatering and filtration device for riverboat silt as described in claim 1, characterized in that: The conveying assembly includes a hollow column, a guide tube, and a conveying tube. The hollow column is rotatably mounted at the end of the frame, and the drive shaft is fixedly mounted at one end of the hollow column. The guide tube passes through the hollow column and the spiral blade and extends into the guide channel. The conveying tube is rotatably mounted at the other end of the hollow column and passes through the interior of the hollow column.

3. The integrated dual-stage compression dewatering and filtration device for riverboat silt as described in claim 1, characterized in that: The pneumatic dehydration assembly also includes a sleeve, a tube, an air inlet pipe, and a U-shaped rod. The sleeve is coaxially disposed at one end of the drive shaft, the tube is disposed between the drive shaft and the sleeve, the air inlet pipe passes through the tube, and the U-shaped rod is disposed inside the tube with its two ends connected to the drive shaft and the sleeve, respectively.

4. The integrated dual-stage compression dewatering and filtration device for riverboat silt as described in claim 1, characterized in that: The connecting assembly includes a mounting block and a synchronizing rod. There are two mounting blocks, which are coaxial and respectively mounted on the first and second helical blades. The synchronizing rod is fixedly mounted between the two mounting blocks and is an elastic telescopic rod.

5. The integrated dual-stage compression dewatering and filtration device for riverboat silt as described in claim 1, characterized in that: The length of the first spiral blade is greater than that of the second spiral blade. The right end of the first spiral blade extends to the outside of the frame. Both the first and second spiral blades have turbulence grooves on the side facing the flow channel, and the bottom of the turbulence grooves is set at an acute angle.

Images