A double tangential residue feeding screw press

Abstract

The utility model discloses a kind of double tangential slag feeding screw presses, it is related to sewage treatment equipment field, including: slag collection tank, inside is equipped with intercommunicating slag feeding channel and filter conveying cavity, the filter conveying cavity that extends along horizontal direction is rotationally provided with axis horizontal spiral shaft, the included angle of slag feeding channel and horizontal direction is 20 °~40 °, the inclination direction of slag feeding channel is same with the inclination angle of spiral shaft's blade, the outlet of slag feeding channel is located in the center line of spiral shaft one side;Filter screen, set in the downside of filter conveying cavity, the bottom of slag collection tank is provided with drain, drain is communicated with filter conveying cavity, filter screen is set between drain and filter conveying cavity;The structure of the press can avoid the problem that fiber material is wound around spiral shaft and grease dirt blocks filter screen, effectively improve equipment stability, reduce equipment maintenance workload, reduce equipment operation and maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the field of sewage treatment equipment, and more specifically, relates to a double tangential feed screw press. Background Technology

[0002] Pretreatment is an indispensable process in wastewater treatment. Pretreatment mainly involves physical filtration and sedimentation to intercept slag and sand in wastewater, thereby ensuring the stable operation of subsequent processes.

[0003] The screw press is a supporting equipment for dewatering and pressing screenings in the fine screen of the pretreatment area of ​​a wastewater treatment plant. Especially when using an internal flow perforated screen, because the perforated screen requires a large amount of flushing water to clean the screen during operation, the screenings discharged from the perforated screen are actually a mixture of sludge and water containing a large amount of flushing water, with a water content of about 99% or more. A screw press must be equipped to separate the sludge and water mixture discharged from the perforated screen and press the screenings to facilitate the transfer and subsequent treatment of the screenings.

[0004] The screw press mainly consists of a motor reducer, frame housing, slag collection box, drive shaft, screw shaft, filter screen, water collection tank, and pressing pipe. The slag and water enter the cavity from the top inlet of the slag collection box. After being filtered by the screen, the slag is trapped on the upper part of the screen. The water flows out through the filter holes of the screen and is discharged into the water collection tank. The slag trapped on the upper part of the screen is transported to the pressing pipe by the screw shaft. The pressing pipe is a round pipe that is inclined upward at a 45-degree angle. After the slag enters the pressing pipe, it is compressed, and the water in the slag is further dehydrated and pressed. The pressed slag is discharged from the slag outlet.

[0005] In a conventional press, the slag inlet is located directly above the center of the slag collection box. The slag falls into the slag collection trough and strikes the center line of the screw shaft. The screw shaft is a shafted screw. When the feed slag contains a large amount of long fiber material, the long fiber material will gradually wrap around the screw shaft during rotation. After a long period of accumulation, it must be cleaned manually. Cleaning the fiber material tightly wrapped around the screw shaft is very difficult.

[0006] Municipal sewage also contains a certain amount of oily substances. When the oil is intercepted and retrieved by the screenings and enters the press, it will clog the stainless steel filter screen of the press. Even using rinsing water is not enough to effectively clean the oil on the screen, which seriously reduces the water flow capacity of the press and affects its normal operation. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a double-tangential feed screw press. This press structure can avoid the problems of fiber entanglement on the screw shaft and grease clogging the filter screen, effectively improving equipment stability, reducing equipment maintenance workload, and lowering equipment operation and maintenance costs.

[0008] To achieve the above objectives, this utility model provides a double tangential feed screw press, comprising:

[0009] The slag collection box has an internally connected slag inlet channel and a filter conveying chamber. A horizontally oriented spiral shaft is rotatably installed in the filter conveying chamber. The angle between the slag inlet channel and the horizontal direction is 20° to 40°. The inclination direction of the slag inlet channel is the same as the inclination angle of the blades of the spiral shaft. The outlet of the slag inlet channel is located on one side of the center line of the spiral shaft.

[0010] A filter screen is disposed on the lower side of the filter conveying cavity. A drain outlet is provided at the bottom of the slag collection box. The drain outlet is connected to the filter conveying cavity. The filter screen is disposed between the drain outlet and the filter conveying cavity.

[0011] Optionally, the filter screen is U-shaped, and the filter screen at least surrounds the lower part of the spiral shaft.

[0012] Optionally, a slag inlet guide plate is provided circumferentially in the slag inlet channel, and the lower end of the slag inlet guide plate is tangent to the wall of the filter screen plate.

[0013] Optionally, it also includes a frame housing, on which a motor reducer is provided that is connected to one end of the helical shaft.

[0014] Optionally, the outlet end of the filter conveying chamber is sequentially connected to the pressing pipe and the slag outlet.

[0015] Optionally, the top of the slag collection box is also provided with an observation hole cover and a liquid level detection sensor. The observation hole cover is connected to the filter conveying cavity, and the liquid level detection sensor extends into the filter conveying cavity.

[0016] Optionally, a support plate is provided at the connection between the filter conveying cavity and the pressing tube.

[0017] Optionally, the top of the slag collection box is provided with a slag inlet, which is connected to the upper part of the slag inlet channel.

[0018] Optionally, it also includes a flushing water pipe that runs through the slag collection box, the outlet of the flushing water pipe being connected to a plurality of screen flushing nozzles, the screen flushing nozzles being arranged toward the filter screen.

[0019] Optionally, a moving guide rail is provided below the filter screen in a horizontal direction, and the screen washing nozzle is slidably connected to the moving guide rail.

[0020] This utility model provides a double tangential feed screw press, the advantages of which are:

[0021] 1. The press makes an angle between the feeding direction of the slag inlet channel and the feeding direction of the filter conveying chamber, 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 tangential direction of the spiral blades.

[0022] 2. The material is conveyed forward along the spiral direction of the screw shaft in the filter conveying chamber of the press by the impact force of the water flow. This can avoid the screw blades from obstructing the water flow. In addition, a filter screen is covered under the screw shaft, so that the water flow can fill the filter screen at the fastest speed, maximize the use of the effective filtration area of ​​the screen, and improve the filtration capacity of the screen.

[0023] 3. The press sets the discharge port of the slag inlet channel off to one side of the screw shaft centerline. Under the guidance of the slag inlet guide plate, the material enters the filter conveying chamber tangentially along one side of the filter screen plate, and no longer hits the screw shaft centerline vertically, effectively avoiding the problem of slag fiber wrapping around the screw shaft.

[0024] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0025] The above and other objects, features and advantages of the present invention will become more apparent from the accompanying drawings, in which like reference numerals generally represent like parts.

[0026] Figure 1 A schematic diagram of a double-tangential feed screw press according to an embodiment of the present invention is shown.

[0027] Figure 2 It shows Figure 1 A side sectional view.

[0028] Figure 3 It shows Figure 1 Top view.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Slag collection box; 2. Spiral shaft; 3. Slag inlet channel; 4. Filter screen; 5. Drain outlet; 6. Slag inlet guide plate; 7. Frame housing; 8. Motor reducer; 9. Pressing pipe; 10. Slag outlet; 11. Observation hole cover plate; 12. Liquid level detection sensor; 13. Support plate; 14. Slag inlet; 15. Flushing water pipe; 16. Filter screen flushing nozzle; 17. Moving guide rail. Detailed Implementation

[0031] Preferred embodiments of the present invention will now be described in more detail. While 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 to the embodiments set forth herein. Rather, 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] This utility model provides a double tangential feed screw press, comprising:

[0033] The slag collection box has an interconnected slag inlet channel and a filter conveying chamber. A horizontally oriented spiral shaft is rotatably installed in the filter conveying chamber. The slag inlet channel has an angle of 20° to 40° with the horizontal direction. The inclination direction of the slag inlet channel is the same as the inclination angle of the blades of the spiral shaft. The outlet of the slag inlet channel is located on one side of the center line of the spiral shaft.

[0034] The filter screen is located on the lower side of the filter conveying chamber. The bottom of the slag collection box is equipped with a drain outlet, which is connected to the filter conveying chamber. The filter screen is located between the drain outlet and the filter conveying chamber.

[0035] Specifically, the press feeds material through the top inlet channel, which then enters the filtration and conveying chamber. The spiral blades of the screw shaft transport the material horizontally. During this transport, the liquid is filtered through the filter screen and finally collected at the drain outlet, exiting into the slag collection box. The inlet channel's extension direction forms an angle with the filtration and conveying chamber's extension direction, and the lower outlet of the inlet channel is located on one side of the screw shaft's centerline. This ensures that the material enters the filtration and conveying chamber along the tangent of the filter screen, preventing it from impacting the screw shaft's centerline vertically. This effectively avoids the problem of fibrous material entanglement on the screw shaft. Another important design requirement is that the angle between the inlet channel and the filtration and conveying chamber matches the inclination angle of the screw shaft blades, further preventing fiber entanglement. In addition, a filter screen is installed below the filter conveying chamber. When the material is fed by the spiral shaft blades, the impact force of the water flow gives the material a forward force. The water flow can cover the entire filter screen at the fastest speed. This can avoid the spiral blades from obstructing the water flow and can also maximize the use of the filter screen to increase the filtration area and improve the water passage capacity of the filter screen.

[0036] In one embodiment, the filter screen is made of polytetrafluoroethylene (PTFE). PTFE has high lubricity and non-stick properties, which can effectively prevent grease adhesion and avoid the problem of grease clogging the filter screen.

[0037] Optionally, the filter screen is U-shaped and at least surrounds the lower part of the spiral shaft.

[0038] Specifically, the filter screen is set between the drain outlet and the filter conveying chamber. In order to improve the water flow capacity of the filter conveying chamber, the filter screen is fully covered along the length of the spiral shaft. The filter screen is also wrapped around the side and bottom of the spiral shaft. In this way, when the spiral blades feed the material, the water flow covers the entire filter screen during the transmission process, maximizing the utilization of the effective filtration area of ​​the filter screen.

[0039] Optionally, a slag inlet guide plate is provided around the slag inlet channel, and the lower end of the slag inlet guide plate is tangent to the wall of the filter screen plate.

[0040] Specifically, a slag inlet channel is formed circumferentially by a slag inlet guide plate inside the slag collection box. The lower end of the slag inlet guide plate is flush with the cavity wall of the filter conveying chamber. In this way, the material can enter one side of the center line of the screw shaft through the slag inlet channel. Furthermore, the direction of the slag inlet channel is the same as the inclination angle of the screw shaft blades. When the material enters the filter conveying chamber, only the side of the screw shaft blades comes into contact with the material. The shaft of the screw shaft will not come into contact with the material, thus preventing the material from getting tangled on the shaft. The cavity wall of the filter conveying chamber will not create resistance to the material, maintaining the feeding speed of the material in the filter conveying chamber.

[0041] Optionally, it also includes a frame housing, on which a motor reducer is provided that is connected to one end of the screw shaft.

[0042] Optionally, the outlet end of the filter conveying chamber is connected in sequence to the pressing pipe and the slag outlet.

[0043] Optionally, the top of the slag collection box is also equipped with an observation hole cover and a liquid level detection sensor. 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 chamber and the pressing pipe.

[0045] Specifically, the two ends of the slag collection box are supported and connected by the frame housing and the support plate, respectively. The motor reducer at one end of the slag collection box drives the screw shaft to rotate, and the material is pressed into the pipe under the drive of the screw shaft and finally discharged from the slag outlet. The feeding status in the filter conveying chamber is observed through the observation hole cover plate, and the liquid level detection sensor monitors the liquid level in the filter conveying chamber and discharges the filtrate in a timely manner through the drain outlet.

[0046] Optionally, the top of the slag collection box is provided with a slag inlet, which is connected to the upper part of the slag inlet channel.

[0047] Optionally, it also includes a flushing water pipe that runs through the slag collection box, the outlet of the flushing water pipe being connected to multiple screen flushing nozzles, the screen flushing nozzles being positioned toward the filter screen.

[0048] Optionally, a moving guide rail is provided below the filter screen in the horizontal direction, and the screen washing nozzle is connected and slidably mounted on the moving guide rail.

[0049] Specifically, when grease clogs 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 nozzles will flush and clean the filter screen. A moving guide rail is installed below the filter screen, the length of which corresponds to the length of the filter screen. The screen flushing nozzles move while flushing, thoroughly cleaning the entire filter screen and restoring its water flow capacity.

[0050] Example

[0051] like Figures 1 to 3 As shown, this utility model provides a double tangential feed screw press, comprising:

[0052] The slag collection box 1 has an interconnected slag inlet channel and a filter conveying chamber inside. A horizontally oriented spiral shaft 2 is rotatably installed in the filter conveying chamber. The slag inlet channel 3 has an angle of 20° to 40° with the horizontal direction. The inclination direction of the slag inlet channel 3 is the same as the inclination angle of the blades of the spiral shaft 2. 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 set on the lower side of the filter conveying cavity. The bottom of the slag collection box 1 is provided with a drain outlet 5, which is connected to the filter conveying cavity. The filter screen plate 4 is set between the drain outlet 5 and the filter conveying cavity.

[0054] In this embodiment, the filter screen 4 is U-shaped and at least surrounds the lower part of the spiral shaft 2.

[0055] In this embodiment, a slag inlet guide plate 6 is provided around the slag inlet channel 3, and the lower end of the slag inlet guide plate 6 is tangent to the wall of the filter screen plate 4.

[0056] In this embodiment, a frame housing 7 is also included, on which a motor reducer 8 is provided and connected to one end of the screw shaft 2.

[0057] In this embodiment, the outlet end of the filter conveying chamber is sequentially connected to the pressing pipe 9 and the slag outlet 10.

[0058] In this embodiment, the top of the slag collection box 1 is also provided with an observation hole cover plate 11 and a liquid level detection sensor 12. The observation hole cover plate 11 is connected to the filter conveying cavity, and the liquid level detection sensor 12 extends into the filter 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, the top of the slag collection box 1 is provided with a slag inlet 14, which is connected to the upper part of the slag inlet channel 3.

[0061] In this embodiment, a flushing water pipe 15 is also provided through the slag collection box 1. The outlet of the flushing water pipe 15 is connected to a plurality of screen flushing nozzles 16, which are arranged toward the filter screen 4.

[0062] In this embodiment, a movable guide rail 17 is provided below the filter screen 4 along the horizontal direction, and the screen washing nozzle 16 is slidably mounted on the movable guide rail 17.

[0063] In summary, this press, based on a conventional press, encloses the feed channel 3 with a feed guide plate 6. The outlet of the feed channel 3 is located offset to one side of the centerline of the screw shaft 2. After being guided by the guide plate 6, the feed material enters the filtration and conveying chamber tangentially along one side of the filter screen 4, no longer impacting the centerline of the screw shaft 2 vertically. This effectively avoids the problem of feed material fibers entangled in the screw shaft. Furthermore, the press guides the feed forward, causing the material to flow into the filtration and conveying chamber at an angle. This ensures that the inclination angle of the feed channel 3 is basically consistent with the inclination angle of the screw blades, meaning the material enters along the tangential direction of the screw blades. This structure utilizes the impact force of the water flow to convey the material forward along the spiral direction of the screw shaft 2, avoiding obstruction of the water flow by the screw blades. This allows the water to quickly cover the filter screen 4, maximizing the effective filtration area of ​​the screen and improving its water-passing capacity.

[0064] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations 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 feed screw press, characterized in that, include: The slag collection box has an internally connected slag inlet channel and a filter conveying chamber. A horizontally oriented spiral shaft is rotatably installed in the filter conveying chamber. The angle between the slag inlet channel and the horizontal direction is 20°~40°. The inclination direction of the slag inlet channel is the same as the inclination angle of the spiral shaft blades. The outlet of the slag inlet channel is located on one side of the center line of the spiral shaft. A filter screen is disposed on the lower side of the filter conveying cavity. A drain outlet is provided at the bottom of the slag collection box. The drain outlet is connected to the filter conveying cavity. The filter screen is disposed between the drain outlet and the filter conveying cavity.

2. The double tangential feed screw press according to claim 1, characterized in that, The filter screen is U-shaped and at least surrounds the lower part of the spiral shaft.

3. The double tangential feed screw press according to claim 1, characterized in that, A slag inlet guide plate is provided around the slag inlet channel, and the lower end of the slag inlet guide plate is tangent to the wall of the filter screen plate.

4. The double tangential feed screw press according to claim 1, characterized in that, It also includes a frame housing, on which a motor reducer is provided that is connected to one end of the screw shaft.

5. The double tangential feed screw press according to claim 1, characterized in that, The outlet end of the filter conveying chamber is connected in sequence to the pressing pipe and the slag outlet.

6. The double tangential feed screw press according to claim 5, characterized in that, The top of the slag collection box is also equipped with an observation hole cover and a liquid level detection sensor. The observation hole cover is connected to the filter conveying cavity, and the liquid level detection sensor extends into the filter conveying cavity.

7. The double tangential feed screw press according to claim 5, characterized in that, A support plate is provided at the connection between the filter conveying cavity and the pressing tube.

8. The double tangential feed screw press according to claim 1, characterized in that, The top of the slag collection box is provided with a slag inlet, which is connected to the upper part of the slag inlet channel.

9. The double tangential feed screw press according to claim 1, characterized in that, It also includes a flushing water pipe that runs through the slag collection box, the outlet of which is connected to multiple screen flushing nozzles, which are positioned toward the filter screen.

10. The double tangential feed screw press according to claim 9, characterized in that, A movable guide rail is provided horizontally below the filter screen, and the screen rinsing nozzle is slidably mounted on the movable guide rail.

Images