Double-tangential slag feeding screw press
By designing a double tangential slag inlet spiral press, the problem of fibers wrapping the spiral shaft and grease-filling filter plates is solved, improving the stability of the equipment and reducing operation and maintenance costs.
Patent Information
- Application Number
- CN202510292049.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2025-06-10
AI Technical Summary
When existing spiral presses deal with sewage containing fibers and grease, they are prone to the problem of fibers wrapping around the spiral shaft and grease blocking the filter screen plate, resulting in poor equipment stability, large maintenance workload and high operation and maintenance costs.
A double tangential slag inlet spiral press is designed. By forming an angle between the feeding direction of the slag inlet channel and the feeding direction of the filter conveying cavity, a U-shaped filter mesh plate is installed below the filter conveying cavity, and materials are transported forward by using the impact force of the water flow to prevent fibers from wrapping around the spiral shaft and grease from blocking the mesh plate.
It effectively avoids the problem of fibers wrapping the spiral shaft and grease blocking the filter screen plate, improves the stability of the equipment, and reduces maintenance workload and operation and maintenance costs.
Smart Images
Figure CN120116530A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the field of sewage treatment equipment, and more specifically, relates to a double tangential slag feeding screw press. Background Art
[0002] Pretreatment is an indispensable process in the sewage treatment process. Pretreatment mainly intercepts slag and sand in the sewage through physical filtration and sedimentation to ensure the stable operation of subsequent processes.
[0003] A screw press is a supporting grid residue dewatering and pressing equipment for fine grids in the pretreatment area of a sewage treatment plant. Especially when an inner-flow orifice plate grid is used, since a large amount of flushing water is required to clean the mesh plate during the operation of the orifice plate grid, the grid residue discharged from the orifice plate grid is actually a mixture of slag and water containing a large amount of flushing water, with a moisture content of about 99% or more. It is necessary to equip a screw press to separate the slag and water and press the grid residue of the slag-water mixture discharged from the orifice plate grid to facilitate the transfer and subsequent treatment of the grid residue.
[0004] The screw press mainly consists of components such as a motor reducer, a frame housing, a slag collection box, a drive shaft, a screw shaft, a filter mesh plate, a water collection tank, and a pressing pipe. The slag water enters the inner part of the cavity from the top inlet of the slag collection box. After being filtered by the mesh plate, the grid residue is intercepted above the mesh plate, and the water flows out through the filter holes of the mesh plate and enters the water collection tank for discharge. The grid residue intercepted above the mesh plate is conveyed by the screw shaft to the pressing pipe. The pressing pipe is a circular pipe inclined upward at an elevation angle of 45 degrees. After the grid residue enters the pressing pipe, it is compressed, and the water in the grid residue is further dehydrated and pressed. The pressed grid residue is discharged from the slag outlet.
[0005] The inlet of the conventional press is directly above the center of the slag collection box. The grid residue falls into the slag collection tank and vertically hits the center line position of the screw shaft. The screw shaft is a shafted screw. When a large amount of long fiber substances are contained in the fed slag, the long fiber substances will gradually wind around the screw shaft during the rotation of the screw shaft. After a long time of accumulation, it must be cleaned manually, and it is very difficult to clean the fiber substances tightly wound around the screw shaft.
[0006] Municipal sewage also contains a certain amount of grease substances. After the grease is intercepted and fished out by the grid together with the grid residue and enters the press, it will block the stainless steel filter mesh plate of the press, and it is difficult to effectively clean the grease on the mesh plate with flushing water, seriously affecting the water passing capacity of the press and the normal operation of the press. Summary of the Invention
[0007] The purpose of the present invention is to address the deficiencies in the prior art and provide a double tangential slag feeding screw press. The structure of this press can avoid the problems of fiber winding around the screw shaft and grease fouling of the filter mesh plate, effectively improving the equipment stability, reducing the equipment maintenance workload, and lowering the equipment operation and maintenance costs.
[0008] To achieve the above object, the present invention provides a double tangential slag inlet screw press, comprising:
[0009] A slag collection box, internally provided with a slag inlet channel and a filtering and conveying cavity that communicate with each other. A screw shaft with a horizontal axis is rotatably arranged in the horizontally extending filtering and conveying cavity. The slag inlet channel forms an angle with the horizontal direction, and the outlet of the slag inlet channel is located on one side of the center line of the screw shaft;
[0010] A filter screen plate, arranged on the lower side of the filtering and conveying cavity. A drain port is provided at the bottom of the slag collection box, and the drain port communicates with the filtering and conveying cavity. The filter screen plate is arranged between the drain port and the filtering and conveying cavity.
[0011] Optionally, the filter screen plate is U-shaped, and the filter screen plate at least surrounds the lower part of the screw shaft.
[0012] Optionally, a slag inlet guide plate is arranged in the circumferential direction of the slag inlet channel, and the lower end of the slag inlet guide plate is tangent to the plate wall of the filter screen plate.
[0013] Optionally, it further includes a frame housing, and a motor reducer connected to one end of the screw shaft is arranged on the frame housing.
[0014] Optionally, the outlet end of the filtering and conveying cavity is sequentially connected to a pressing pipe and a slag outlet.
[0015] Optionally, an observation hole cover plate and a liquid level detection sensor are further arranged on the top of the slag collection box. The observation hole cover plate communicates with the filtering and conveying cavity, and the liquid level detection sensor extends into the filtering and conveying cavity.
[0016] Optionally, a support plate is arranged at the connection between the filtering and conveying cavity and the pressing pipe.
[0017] Optionally, a slag inlet is arranged on the top of the slag collection box, and the slag inlet communicates with the upper part of the slag inlet channel.
[0018] Optionally, it further includes a flushing water pipe penetrating through the slag collection box. The outlet of the flushing water pipe is connected to a plurality of screen plate flushing nozzles, and the screen plate flushing nozzles are arranged towards the filter screen plate.
[0019] Optionally, a moving guide rail is arranged horizontally below the filter screen plate, and the screen plate flushing nozzles are connected and slidably arranged on the moving guide rail.
[0020] The present invention provides a double tangential slag inlet screw press, and its beneficial effects are as follows:
[0021] 1. The feeding direction of the slag inlet channel of this press forms an angle with the feeding direction of the filtering and conveying cavity, and the angle is consistent with the inclination angle of the spiral blades on the spiral shaft, so that the material can enter along the tangent direction of the spiral blades.
[0022] 2. In the filtering and conveying cavity of this press, the impact force of water flow is used to convey the material forward along the spiral direction of the spiral shaft, which can avoid the spiral blades from obstructing the water flow. And a filter screen plate is covered below the spiral shaft, so that the water flow can cover the filter screen plate at the fastest speed, making the most of the effective filtering area of the screen plate and improving the filtering capacity of the screen plate.
[0023] 3. The discharge port of the slag inlet channel of this press is offset and arranged on one side of the center line of the spiral shaft. Under the guiding action of the slag inlet diversion plate, the material enters the filtering and conveying cavity along the tangent direction of one side of the filter screen plate, and no longer vertically hits the center line of the spiral shaft, effectively avoiding the problem of the slag inlet fiber material winding around the spiral shaft.
[0024] Other features and advantages of the present invention will be described in detail in the following specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] By describing the exemplary embodiments of the present invention in more detail in conjunction with the drawings, the above and other objects, features, and advantages of the present invention will become more obvious. Among them, in the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.
[0026] Figure 1 FIG. shows a schematic structural diagram of a double tangential slag inlet screw press according to an embodiment of the present invention.
[0027] Figure 2 FIG. shows Figure 1 a side sectional view of
[0028] Figure 3 FIG. shows Figure 1 a top view of
[0029] DESCRIPTION OF THE REFERENCE NUMERALS:
[0030] 1. Slag collection box; 2. Spiral shaft; 3. Slag inlet channel; 4. Filter screen plate; 5. Drainage port; 6. Slag inlet diversion plate; 7. Frame housing; 8. Motor reducer; 9. Pressing pipe; 10. Slag discharge port; 11. Observation hole cover plate; 12. Liquid level detection sensor; 13. Support plate; 14. Slag inlet; 15. Flushing water pipe; 16. Screen plate flushing nozzle; 17. Moving guide rail. DETAILED DESCRIPTION OF THE INVENTION
[0031] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.
[0032] The present invention provides a double tangential slag feeding screw press, comprising:
[0033] The slag collecting box is provided with a slag inlet channel and a filtering and conveying cavity which are interconnected. A spiral shaft with a horizontal axis is rotatably arranged in the filtering and conveying cavity extending in the horizontal direction. The slag inlet channel forms an angle with the horizontal direction, and the outlet of the slag inlet channel is located on one side of the center line of the spiral shaft.
[0034] The filter screen plate is arranged at the lower side of the filter conveying cavity. A drain port is arranged at the bottom of the slag collecting box. The drain port is communicated with the filter conveying cavity. The filter screen plate is arranged between the drain port and the filter conveying cavity.
[0035] Specifically, the press realizes feeding from the slag inlet channel at the top, and then enters the filter conveying cavity, so that the spiral blades of the spiral shaft can transfer the material in the horizontal direction. During the transfer process, the liquid is filtered out through the filter screen plate, and finally collected at the drain outlet and discharged outside the slag collection box; wherein, the extension direction of the slag inlet channel forms an angle with the extension direction of the filter conveying cavity, and the lower end discharge port of the slag inlet channel is located on the side of the center line of the spiral shaft, so that after the material enters the filter conveying cavity, it will enter the filter conveying cavity along the tangent of one side of the filter screen plate, and the material will not hit the center line of the spiral shaft vertically, which can effectively avoid the problem of slag fiber winding around the spiral shaft; there is also an important setting requirement, that is, the angle between the slag inlet channel and the filter conveying cavity is consistent with the inclination angle of the blades of the spiral shaft, and the angle can be between 20°-40°. This can better prevent the phenomenon of fiber winding around the shaft. In addition, a filter screen is provided below the filter conveying cavity. When the material is being fed by the spiral shaft blades, the impact force of the water flow is used to give the material a forward force. The water flow can cover the entire filter screen at the fastest speed. This can avoid obstruction of the water flow by the spiral blades, and can also maximize the use of the filter screen to increase the filtration area and improve the water flow capacity of the filter screen.
[0036] In one embodiment, the filter screen is made of polytetrafluoroethylene, which has high lubricity and non-stickiness, and can effectively prevent grease from adhering, thereby effectively preventing the problem of grease clogging the screen.
[0037] Optionally, the filter screen plate is U-shaped, and the filter screen plate at least surrounds the lower part of the spiral shaft.
[0038] Specifically, the filter mesh plate is arranged between the drain port and the filter conveying cavity. In order to improve the water flow capacity of the filter conveying cavity, the filter mesh plate is completely covered in the length direction of the spiral shaft. The filter mesh plate is also wrapped around the side and lower part of the spiral shaft. In this way, when the spiral blades feed, the water flow covers the entire filter mesh plate during the transmission process, thereby maximizing the effective filtering area of the filter mesh plate.
[0039] Optionally, a slag inlet guide plate is provided on the circumference of the slag inlet channel, and the lower end of the slag inlet guide plate is tangent to the plate wall of the filter screen plate.
[0040] Specifically, a slag inlet channel is formed in the slag collecting box through the circumferential arrangement of the slag inlet guide plate, and the lower end of the slag inlet guide plate is flush with the cavity wall of the filtering and conveying cavity, so that the material can enter the center line side of the spiral shaft through the slag inlet channel, and the arrangement direction of the slag inlet channel is the same as the inclination angle direction of the spiral shaft blades. When the material enters the filtering and conveying cavity, only the side surfaces of the spiral shaft blades come into contact with the material, and the shaft of the spiral shaft does not come into contact with the feed, thereby preventing the material from being entangled on the shaft. The cavity wall of the filtering and conveying cavity does not generate resistance to the feed, thereby maintaining the feeding speed of the material in the filtering and conveying cavity.
[0041] Optionally, it also includes a frame shell, on which a motor reducer connected to one end of the screw shaft is arranged.
[0042] Optionally, the outlet end of the filtering and conveying cavity is connected to the pressing pipe and the slag outlet in sequence.
[0043] Optionally, an observation hole cover and a liquid level detection sensor are also provided on the top of the slag collecting box, the observation hole cover is connected to the filter conveying cavity, and the liquid level detection sensor extends into the filter conveying cavity.
[0044] Optionally, a support plate is provided at the connection between the filter conveying cavity and the pressing tube.
[0045] Specifically, the two ends of the slag collecting box are supported and connected by a frame shell and a support plate respectively. The motor reducer at one end of the slag collecting box drives the screw shaft to rotate, and the material is pressed into the tube under the drive of the screw shaft and finally discharged from the slag outlet. The feeding status in the filter and conveying chamber is observed through the observation hole cover plate, and the liquid level detection sensor monitors the liquid level in the filter and conveying chamber, and the filtrate is discharged through the drain port in time.
[0046] Optionally, a slag inlet is provided on the top of the slag collecting box, and the slag inlet is communicated with the upper part of the slag inlet channel.
[0047] Optionally, it also includes a flushing water pipe that runs through the slag collecting box, the outlet of the flushing water pipe is connected to a plurality of mesh plate flushing nozzles, and the mesh plate flushing nozzles are arranged in the direction of the filter mesh plate.
[0048] Optionally, a movable guide rail is arranged below the filter screen plate in the horizontal direction, and the screen plate flushing nozzle is connected and slidably arranged on the movable guide rail.
[0049] Specifically, when grease blocks the filter holes on the filter screen, the liquid level in the filter conveying chamber will rise, the liquid level detection sensor will sound an alarm, and the screen flushing nozzle will flush and clean the filter screen; a movable guide rail is provided under the filter screen, and the length of the movable guide rail corresponds to the length of the filter screen. The screen flushing nozzle moves while flushing to comprehensively clean the entire filter screen and restore the water flow capacity of the filter screen.
[0050] Example
[0051] like Figures 1 to 3 As shown, the present invention provides a double tangential slag feeding screw press, comprising:
[0052] A slag collecting box 1 is provided with a slag inlet channel and a filtering and conveying cavity which are interconnected. A spiral shaft 2 with a horizontal axis is rotatably arranged in the filtering and conveying cavity extending in the horizontal direction. The slag inlet channel 3 forms an angle with the horizontal direction. The outlet of the slag inlet channel 3 is located on one side of the center line of the spiral shaft 2.
[0053] The filter screen plate 4 is arranged at the lower side of the filter conveying cavity. A drain port 5 is arranged at the bottom of the slag collecting box 1. The drain port 5 is communicated with the filter conveying cavity. The filter screen plate 4 is arranged between the drain port 5 and the filter conveying cavity.
[0054] In this embodiment, the filter screen plate 4 is U-shaped, and the filter screen plate 4 at least surrounds the lower portion of the spiral shaft 2 .
[0055] In this embodiment, a slag inlet guide plate 6 is provided on the circumference of the slag inlet channel 3 , and the lower end of the slag inlet guide plate 6 is tangent to the plate wall of the filter screen plate 4 .
[0056] In this embodiment, a frame housing 7 is further included, and a motor reducer 8 connected to one end of the screw shaft 2 is disposed on the frame housing 7 .
[0057] In this embodiment, the outlet end of the filtering and conveying cavity is connected to the squeezing pipe 9 and the slag outlet 10 in sequence.
[0058] In this embodiment, an observation hole cover plate 11 and a liquid level detection sensor 12 are further provided on the top of the slag collecting box 1. The observation hole cover plate 11 is connected to the filtering and conveying cavity, and the liquid level detection sensor 12 extends into the filtering and conveying cavity.
[0059] In this embodiment, a support plate 13 is provided at the connection between the filter conveying cavity and the pressing tube 9 .
[0060] In this embodiment, a slag inlet 14 is provided on the top of the slag collecting box 1 , and the slag inlet 14 is communicated with the upper part of the slag inlet channel 3 .
[0061] In this embodiment, a flushing water pipe 15 is further included which runs through the slag collecting box 1 . The outlet of the flushing water pipe 15 is connected to a plurality of mesh plate flushing nozzles 16 . The mesh plate flushing nozzles 16 are arranged toward the filter mesh plate 4 .
[0062] In this embodiment, a movable guide rail 17 is arranged below the filter screen plate 4 in the horizontal direction, and the screen plate flushing nozzle 16 is connected and slidably arranged on the movable guide rail 17 .
[0063] In summary, on the basis of a conventional press, the slag inlet channel 3 is enclosed by a slag inlet guide plate 6, and the outlet of the slag inlet channel 3 is located on the side offset from the center line of the spiral shaft 2. After being guided by the guide plate 6, the feed enters the filter conveying cavity along the tangent of one side of the filter mesh plate 4, and no longer hits the center line of the spiral shaft 2 vertically, which can effectively avoid the problem of slag fiber entanglement with the spiral shaft. In addition, the press also guides the feed forward, so that the material flows obliquely into the filter conveying cavity, so that the inclination angle of the slag inlet channel 3 is basically consistent with the inclination angle of the spiral blade, that is, the material enters along the tangent direction of the spiral blade. This structure can use the impact force of the water flow to transport the material forward along the spiral direction of the spiral shaft 2, and avoid the spiral blade from obstructing the water flow, so that the water flow fills the filter mesh plate 4 at the fastest speed, maximizes the effective filtering area of the mesh plate, and improves the water flow capacity of the mesh plate.
[0064] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.
Claims
1. A double tangential slag feeding screw press, characterized in that: include: The slag collecting box is provided with a slag inlet channel and a filtering and conveying cavity which are interconnected. A spiral shaft with a horizontal axis is rotatably arranged in the filtering and conveying cavity extending in the horizontal direction. The slag inlet channel forms an angle with the horizontal direction, and the outlet of the slag inlet channel is located on one side of the center line of the spiral shaft. The filter screen is arranged at the lower side of the filter conveying cavity. The bottom of the slag collecting box is provided with a drain port, the drain port is communicated with the filter conveying cavity, and the filter screen is arranged between the drain port and the filter conveying cavity.
2. The double tangential slag feeding screw press according to claim 1, characterized in that: The filter screen plate is U-shaped and surrounds at least the lower portion of the spiral shaft.
3. The double tangential slag feeding screw press according to claim 1, characterized in that: A slag inlet guide plate is arranged on the circumference of the slag inlet channel, and the lower end of the slag inlet guide plate is tangent to the plate wall of the filter screen plate.
4. The double tangential slag feeding screw press according to claim 1, characterized in that: It also includes a frame shell, on which a motor reducer connected to one end of the screw shaft is arranged.
5. The double tangential slag feeding screw press according to claim 1, characterized in that: The outlet end of the filtering and conveying cavity is connected with the squeezing pipe and the slag outlet in sequence.
6. The double tangential slag feeding screw press according to claim 5, characterized in that: The top of the slag collecting box is also provided with an observation hole cover plate and a liquid level detection sensor, the observation hole cover plate is communicated with the filtering and conveying cavity, and the liquid level detection sensor extends into the filtering and conveying cavity.
7. The double tangential slag feeding screw press according to claim 5, characterized in that: A support plate is provided at the connection between the filtering and conveying cavity and the squeezing pipe.
8. The double tangential slag feeding screw press according to claim 1, characterized in that: The top of the slag collecting box is provided with a slag inlet, and the slag inlet is communicated with the upper part of the slag inlet channel.
9. The double tangential slag feeding screw press according to claim 1, characterized in that: It also includes a flushing water pipe that runs through the slag collecting box, the outlet of the flushing water pipe is connected to a plurality of mesh plate flushing nozzles, and the mesh plate flushing nozzles are arranged in the direction of the filter mesh plate.
10. The double tangential slag feeding screw press according to claim 9, characterized in that: A movable guide rail is arranged horizontally below the filter screen plate, and the screen plate flushing nozzle is connected and slidably arranged on the movable guide rail.