Pressurized spiral solid-liquid separator

Abstract

The utility model discloses a supercharged stacked spiral solid-liquid separator, which comprises a rack and a stacked spiral main body arranged on the rack, the stacked spiral main body comprises a cavity, a main shaft rotationally connected in the cavity, a spiral sheet fixedly connected on the periphery of the main shaft, and a back pressure plate arranged on one side of the cavity, a driving motor for driving the main shaft to rotate is also mounted on the rack; the device is characterized in that the main shaft is a hollow rod, the diameter of the main shaft is gradually reduced from the end close to the back pressure plate to the end far away from the back pressure plate, and the screw pitch of the spiral piece is gradually increased from the end close to the back pressure plate to the end far away from the back pressure plate; a plurality of belleville springs are installed on the side, away from the spiral blade, of the back pressure piece in an annular array mode relative to the main shaft. According to the sludge dewatering device, the position of the back pressure plate can be rapidly adjusted, the pressure in the cavity is increased, the heat exchange effect between heat of hot smoke and sludge is further improved through the hollow main shaft and the exhaust micropores in the main shaft, and the sludge dewatering effect is overall improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge treatment, in particular to a pressurized spiral stacking solid-liquid separator. Background Art

[0002] After municipal sewage treatment plants treat sewage, the sludge is generally dehydrated to a water content of about 80% through a belt filter press, reaching a solid state without dripping. It is then transported out for further treatment. Due to the high water content, there is still seepage and dripping during transportation; also because of the high water content, most of the sludge transported out is water (solid content is only 20%), which is not economical when mixed with coal, biomass, domestic waste, etc., so further dehydration treatment is generally required.

[0003] At present, the main body of the screw stacking machine on the market is composed of a filter body and a spiral shaft. The filter body is divided into two parts: concentration and dehydration. After the sludge enters the filter body, the relative movement of the fixed ring and the movable ring allows the filtrate to be quickly discharged outward through the gap between the stacked sheets, and the sludge is quickly concentrated, and the sludge moves to the dehydration section. After the sludge enters the dehydration section, the space in the filter chamber continues to shrink, and the internal pressure of the sludge continues to increase. In addition, the back pressure of the back pressure plate at the mud outlet causes it to be dehydrated, and the dry mud is continuously discharged from the machine; in addition, in order to improve the dehydration efficiency, the existing screw stacking machine also uses a hollow shaft for the main shaft, and uses high-temperature steam to heat the main shaft, and then uses heat exchange to remove the moisture from the sludge to achieve the purpose of providing a dehydration effect.

[0004] However, the snail stackers on the market are prone to problems such as thinning of the sludge and sludge leakage when the quality and amount of sludge change. They are difficult to be flexibly applied to sludge of different concentrations, properties and treatment volumes. For sludge that is difficult to separate solids and liquids, or requires further dehydration, the current snail stackers cannot do this. In addition, the main shaft currently exchanges heat with water vapor to evaporate part of the water in the sludge. Although this can achieve the effect of heat exchange dehydration and drying, the heating effect on the main shaft is slow, and the heat exchange rate between the heat contained in the high-temperature water vapor and the sludge is slow, which makes the sludge dehydration and drying effect low. Utility Model Content

[0005] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the utility model is to provide a pressurized screw stack solid-liquid separator, which can quickly adjust the position of the back pressure plate, increase the pressure in the cavity, and further improve the heat exchange effect between the hot flue gas and the sludge through the hollow main shaft and the exhaust micropores on the main shaft, thereby improving the dehydration effect of the sludge as a whole.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A pressurized screw stack solid-liquid separator comprises a frame and a screw stack main body installed on the frame, the screw stack main body comprises a cavity, a main shaft rotatably connected to the cavity, a spiral sheet fixed to the outer periphery of the main shaft, and a back pressure plate installed on one side of the cavity, and a driving motor for driving the main shaft to rotate is also installed on the frame; it is characterized in that the main shaft is a hollow rod, the diameter of the main shaft gradually decreases from an end close to the back pressure end to an end away from the back pressure plate, the pitch of the spiral sheet gradually increases from an end close to the back pressure plate to an end away from the back pressure plate, a plurality of butterfly springs are installed in a ring array about the main shaft on the side of the back pressure plate away from the spiral blades, a support plate is fixed to the main shaft, and an adjustment mechanism for synchronously adjusting the deformation of all butterfly springs is installed on the support plate.

[0008] Preferably, the adjusting mechanism includes a gear ring rotatably connected to the support plate, a connecting plate is fixedly connected to the side of the butterfly spring away from the back pressure plate, the connecting plate is slidably arranged about the main shaft, a plurality of screws are fixedly connected to the side of the connecting plate away from the butterfly spring in a ring array, a plurality of threaded barrels are rotatably connected to the support plate, each of the threaded barrels is threadedly connected to a screw, and a gear meshing with the gear ring is fixedly connected to the outer periphery of the threaded barrel.

[0009] Preferably, a slide bar is fixedly connected to the main shaft, and a slide groove matching the slide bar is formed on the connecting plate.

[0010] Preferably, the main shaft is provided with uniform exhaust micro-holes on its outer periphery, and further comprises an external high-temperature hot flue gas generating device, and the high-temperature hot flue gas generating device supplies high-temperature hot flue gas into the main shaft.

[0011] Preferably, the thickness of the spiral sheet gradually increases from the end of the screw with a thinner diameter.

[0012] Preferably, the spiral blades have ribs to increase the thoroughness of sludge stirring.

[0013] Preferably, at least one adjusting rod is fixedly connected to the outer periphery of the gear ring.

[0014] Preferably, at least one control rod is installed on the side of the support plate facing away from the butterfly spring.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] When solid-liquid separation is difficult, or the dehydration degree needs to be further improved, the deformation of the butterfly spring is quickly and synchronously reduced through the adjustment mechanism, thereby increasing the resistance of the back pressure plate, thereby increasing the pressure in the cavity, and thus improving the dehydration effect; in addition, the heat exchange effect between the hot flue gas and the sludge is further improved through the hollow main shaft and the exhaust micropores on the main shaft, thereby improving the dehydration effect of the sludge as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a partial structural schematic diagram of the utility model;

[0019] Figure 3 for Figure 2 A schematic diagram of the enlarged structure in the middle.

[0020] In the figure: 1. frame; 21. cavity; 211. fixed plate; 212. movable plate; 22. main shaft; 221. exhaust micropores; 23. spiral sheet; 3. back pressure plate; 4. drive motor; 5. butterfly spring; 6. support plate; 7. adjustment mechanism; 71. gear ring; 72. connecting plate; 73. screw; 74. threaded barrel; 75. gear; 8. slide bar; 9. rib; 100. adjustment rod; 101. control rod; 11. filtrate tank. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Please refer to Figure 1-Figure 3 The present embodiment provides a pressurized spiral stack solid-liquid separator, comprising a frame 1 and a spiral stack body mounted on the frame 1, the spiral stack body comprising a cavity 21, it should be noted that the cavity 21 is composed of a plurality of fixed plates 211 arranged in a circular array relative to the axis of the main shaft 22 and a plurality of movable plates 212 stacked along the axis of the main shaft 22, a gap between two adjacent movable plates 212 for drainage, a main shaft 22 rotatably connected to the cavity 21, a spiral sheet 23 fixed to the outer periphery of the main shaft 22, a back pressure plate 3 mounted on one side of the cavity 21, and a driving device 21 mounted on the frame 1. The main shaft 22 is driven by a driving motor 4; the main shaft 22 is a hollow rod, the diameter of the main shaft 22 gradually decreases from the end close to the back pressure plate 3 to the end away from the back pressure plate 3, the pitch of the spiral blade 23 gradually increases from the end close to the back pressure plate 3 to the end away from the back pressure plate 3, and a plurality of butterfly springs 5 ​​are installed in a circular array with respect to the main shaft 22 on the side of the back pressure plate away from the spiral blade, a support plate 6 is fixedly connected to the main shaft 22, and an adjustment mechanism 7 for synchronously adjusting the deformation amount of all butterfly springs 5 ​​is installed on the support plate 6; in addition, a filtrate tank 11 is provided below the cavity 21 for collecting the water filtered from the sludge.

[0023] Furthermore, the adjusting mechanism 7 includes a gear ring 71 rotatably connected to the support plate 6, a connecting plate 72 is fixedly connected to the side of the butterfly spring 5 away from the back pressure plate 3, the connecting plate 72 is slidably arranged about the main shaft 22, and a plurality of screws 73 are fixedly connected to the side of the connecting plate 72 away from the butterfly spring 5 in an annular array, and a plurality of threaded barrels 74 are rotatably connected to the support plate 6, each threaded barrel 74 is threadedly connected to a screw 73, and a gear 75 meshingly connected to the gear ring 71 is fixedly connected to the outer periphery of the threaded barrel 74.

[0024] Furthermore, a slide bar 8 is fixedly connected to the main shaft 22 , and a slide groove is provided on the connecting plate 72 . The connecting plate 72 slides along the axis direction of the main shaft 22 through the cooperation between the slide groove and the slide bar 8 .

[0025] Combined with the specific use scenario, when the drive motor 4 is started, it drives the screw 73 to rotate, and the rotating spiral blade 23 drives the sludge to move from the mud inlet to the mud outlet. The mud inlet of the sludge is set on the side of the cavity away from the back pressure plate. As the diameter of the main shaft 22 gradually increases from the side away from the back pressure plate 3 to the side close to the back pressure plate 3, the pitch of the spiral blade 23 gradually decreases from the side away from the back pressure plate 3 to the side close to the back pressure plate 3. In this way, as the material is transported, the space in the cavity 21 gradually shrinks, and the pressure in the cavity continues to increase, thereby increasing the extrusion force in the cavity 21. Under the strong extrusion force, the filtrate in the sludge is squeezed out through the gap between the movable plate 212 and the fixed plate 211, and enters the filtrate tank 11 for centralized collection and discharge. For those with difficulty in solid-liquid separation or the need to further improve the degree of dehydration, the deformation of all butterfly springs 5 ​​can be quickly and synchronously reduced through the adjustment mechanism 7, thereby increasing the resistance of the back pressure plate 3 and further increasing the pressure in the cavity to improve the degree of dehydration. Here, the embodiment of the present application adjusts the deformation of the butterfly spring 5 through the adjustment mechanism 7 to provide additional resistance in the cavity, and the adjustment of the butterfly spring 5 is specifically as follows: by rotating the ring gear 71, the ring gear 71 and the support plate 6 rotate relative to each other, and then the threaded barrel 74 is driven to rotate under the engagement of the gear 75 and the ring gear 71, and the threaded cooperation between the threaded barrel 74 and the screw 73 will drive the connecting plate 72 and the screw 73 to slide along the axial direction of the main shaft 22 as a whole, compressing the butterfly spring 5, thereby increasing the support force on the back pressure plate 3, and further increasing the pressure in the cavity 21, thereby improving the dewatering effect of the sludge.

[0026] It should be noted here that the advantages of using the butterfly spring 5 are: the butterfly spring can bear a large load in a small space. Compared with other types of springs, the deformation energy per unit volume of the butterfly spring is large, and it has relatively good buffering and shock absorption capabilities. In addition, when using a superimposed combination, due to the surface friction resistance, the effects of absorbing impact and dissipating energy are more different. By changing the ratio of the height of the truncated cone in the disc to the thickness of the disc, different spring property curves can be obtained; because the butterfly spring is annular, the force is concentrated in a concentric manner, thereby making the resistance to the back pressure plate 3 more uniform and stable, ensuring the stability of the dehydration process. In addition, variable stiffness properties can be obtained by combining discs of different thicknesses or by different combinations of discs with different numbers of superimposed discs. Due to changing the number of discs or the combination of discs, the butterfly spring can obtain different load-bearing capacities and property curves. Therefore, discs of each size can adapt to a relatively large range of use, which makes the preparation and management of spare parts relatively easy. Moreover, when some discs are damaged, they only need to be replaced individually, which is conducive to maintenance and repair.

[0027] Reference Figure 2 As a specific implementation of the embodiment of the present application, uniform exhaust micropores 221 are opened on the outer periphery of the main shaft 22. In addition, an external high-temperature hot flue gas generating device is also included, and the high-temperature hot flue gas generating device supplies high-temperature hot flue gas into the main shaft 22.

[0028] In combination with specific usage scenarios, a hollow main shaft 22 is adopted, and exhaust micropores 221 are opened on the main shaft 22. A high-temperature hot flue gas generating device is used to supply high-temperature hot flue gas into the cavity of the main shaft 22, thereby heating the main shaft 22 and the spiral blades 23. In addition, the high-temperature hot flue gas also enters the sludge from the exhaust micropores 221, further increasing the heat contact area for heat exchange with the sludge, and further improving the dehydration and drying effect of the sludge.

[0029] As a specific implementation of the embodiment of the present application, the thickness of the spiral sheet 23 gradually increases from the end away from the back pressure plate 3 of the main shaft 22.

[0030] In combination with specific usage scenarios, by adopting a spiral blade 23 whose thickness gradually increases from the end of the main shaft 22 away from the back pressure plate 3, the space in the cavity can be further reduced from the side away from the back pressure plate 3, thereby further increasing the pressure in the cavity and improving the dehydration effect; in addition, since the overall water content of the sludge close to the mud outlet is lower and the overall hardness increases, the thickness of the spiral blade 23 can be increased to increase the strength of the spiral blade 23, thereby improving the stability of the dehydration work.

[0031] Reference Figure 2 As a specific implementation of the embodiment of the present application, ribs 9 are evenly fixed on the blade surface of the spiral blade 23.

[0032] In combination with specific usage scenarios, the ribs 9 fixed to the spiral blades 23 can not only increase the contact area between the spiral blades 23 and the sludge, thereby increasing the heat exchange area, thereby improving the dehydration and drying efficiency of the sludge, but also can further assist in stirring the sludge through the ribs 9 during the sludge transportation process, thereby increasing the sludge stirring sufficiency and improving the sludge drying efficiency to a certain extent.

[0033] Reference Figure 2 As a specific implementation of the embodiment of the present application, at least one adjusting rod 100 is fixedly connected to the outer periphery of the ring gear 71; further, at least one control rod 101 is installed on the side of the support plate 6 away from the butterfly spring 5.

[0034] In combination with the specific usage scenario, when adjusting the back pressure plate 3, the staff holds the control rod 101 in one hand and the adjustment rod 100 in the other hand to control the ring gear 71 to rotate relative to the support plate 6, and then drives the connecting plate 72 to move under the meshing cooperation of the gear 75 and the ring gear 71 and the spiral cooperation of the threaded through and the screw 73, thereby adjusting the deformation of the butterfly spring 5.

[0035] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A pressurized screw stack solid-liquid separator, comprising a frame (1) and a screw stack body mounted on the frame (1), the screw stack body comprising a cavity (21), a main shaft (22) rotatably connected to the cavity (21), a spiral sheet (23) fixed to the outer periphery of the main shaft (22), and a back pressure plate (3) mounted on one side of the cavity (21), and a drive motor (4) for driving the main shaft (22) to rotate is also mounted on the frame (1); characterized in that: The main shaft (22) is a hollow rod. The diameter of the main shaft (22) gradually decreases from one end close to the back pressure plate (3) to one end away from the back pressure plate (3). The pitch of the spiral sheet (23) gradually increases from one end close to the back pressure plate (3) to one end away from the back pressure plate (3). A plurality of butterfly springs (5) are installed in a circular array with respect to the main shaft (22) on one side of the back pressure plate away from the spiral sheet (23). A support plate (6) is fixedly connected to the main shaft (22). An adjustment mechanism (7) for synchronously adjusting the deformation of all butterfly springs (5) is installed on the support plate (6).

2. A pressurized spiral stack solid-liquid separator according to claim 1, characterized in that: The adjusting mechanism (7) comprises a gear ring (71) rotatably connected to the support plate (6); a connecting plate (72) is fixedly connected to the side of the butterfly spring (5) away from the back pressure plate (3); the connecting plate (72) is slidably arranged with respect to the main shaft (22); a plurality of screw rods (73) are fixedly connected to the side of the connecting plate (72) away from the butterfly spring (5) in an annular array; a plurality of threaded barrels (74) are rotatably connected to the support plate (6); each of the threaded barrels (74) is threadedly connected to a corresponding screw rod (73); and a gear (75) meshingly connected to the gear ring (71) is fixedly connected to the outer periphery of the threaded barrel (74).

3. A pressurized spiral stack solid-liquid separator according to claim 2, characterized in that: A slide bar (8) is fixedly connected to the main shaft (22), and a slide groove matching the slide bar (8) is provided on the connecting plate (72).

4. The pressurized spiral stack solid-liquid separator according to claim 1, characterized in that: The main shaft (22) is provided with uniform exhaust micropores (221) on its outer circumference, and also includes an external high-temperature hot flue gas generating device, wherein the high-temperature hot flue gas generating device supplies high-temperature hot flue gas into the main shaft (22).

5. The pressurized spiral stack solid-liquid separator according to claim 1, characterized in that: The thickness of the spiral sheet (23) gradually increases from the end of the main shaft (22) away from the back pressure plate (3).

6. The pressurized spiral stack solid-liquid separator according to claim 1, characterized in that: Ribs (9) are evenly fixed on the blade surface of the spiral blade (23).

7. The pressurized spiral stack solid-liquid separator according to claim 2, characterized in that: At least one adjustment rod (100) is fixedly connected to the outer periphery of the gear ring (71).

8. The pressurized spiral stack solid-liquid separator according to claim 7, characterized in that: At least one control rod (101) is mounted on the side of the support plate (6) facing away from the butterfly spring (5).

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