A sludge press cement water pre-separation device

Abstract

This utility model relates to the field of sludge treatment technology, and in particular to a sludge pressing cement water pre-separation device, including a pressing chamber, a screw conveyor shaft rotatably connected inside the pressing chamber, the right end of the screw conveyor shaft passing through the pressing chamber and fixedly connected to a motor, the pressing chamber being installed inside a frame, a water receiving tank aligned vertically with the pressing chamber being installed at the upper bottom of the frame, a screen being provided at the bottom of the pressing chamber, and a pre-separation chamber, an upper and lower opening pre-separation chamber being provided above the inlet end of the pressing chamber, a number of sets of staggered guide plates being rotatably connected inside the pre-separation chamber via a rotating shaft, a sludge hopper and a water receiving hopper being arranged sequentially from right to left at the lower end of the pre-separation chamber, and a feed pipe being provided between the sludge hopper and the inlet end of the pressing chamber; this utility model adopts a dual treatment process combining pre-separation and pressing dewatering, which greatly improves the dewatering efficiency and effectively reduces the subsequent pressing load, and the adjustable angle design of the guide plates allows it to adapt to the treatment needs of sludge of different properties.

Description

Technical Field

[0001] This utility model relates to the field of sludge treatment technology, and in particular to a sludge pressing cement water pre-separation device. Background Technology

[0002] Sludge dewatering is a key step in wastewater treatment. Traditional sludge dewatering equipment, such as belt filter presses and plate and frame filter presses, suffers from problems such as large equipment size, high energy consumption, and low dewatering efficiency. In particular, for sludge with high water content, direct mechanical dewatering is often ineffective, leading to increased subsequent treatment costs.

[0003] To address the aforementioned issues, patent application number 202020226248.0 discloses a pre-separation device for high-moisture-content sludge using a pressing method. This device includes a hollow square sludge pressing cylinder, a servo motor mounted on top of the cylinder, an extruder mounted on the output of the servo motor, and a filterable conveyor belt at the bottom of the cylinder. When the servo motor drives the extruder downwards within the cylinder, the extruder presses the high-moisture-content sludge for dewatering. Dewatering is achieved through pressing, and as the extruder presses the sludge, a large amount of water is filtered from the lower conveyor belt into a collection tank. The conveyor belt then transports the filtered, accumulated sludge to a connection point for further processing via a sludge transport pipe, preventing sludge accumulation. However, this device lacks a pre-separation function; the separation of sludge and water relies entirely on the pressing motion, resulting in a high subsequent pressing load. Furthermore, since dewatering is achieved only through a single pressing method, the moisture content of the dewatered sludge remains high.

[0004] Therefore, since the existing devices do not have a pre-separation function and rely solely on extrusion for dewatering, resulting in sludge with a still high moisture content after dewatering, a sludge pressing cement water pre-separation device can be designed. Through the synergistic action of the extrusion mechanism and the separation mechanism, efficient pre-separation and pressing dewatering of sludge can be achieved, thereby reducing the moisture content of the sludge. Utility Model Content

[0005] In order to overcome the problem that existing devices do not have a pre-separation function, rely solely on extrusion for dewatering, and still have a high moisture content in the dewatered sludge.

[0006] The technical solution of this utility model is as follows: a sludge pressing cement water pre-separation device, including a pressing chamber, a screw conveyor shaft rotatably connected inside the pressing chamber, the right end of the screw conveyor shaft passing through the pressing chamber and fixedly connected to a motor, the pressing chamber being installed inside a frame, a water receiving tank aligned vertically with the pressing chamber being installed at the upper bottom of the frame, a screen being provided at the bottom of the pressing chamber, and a pre-separation chamber, an upper and lower opening pre-separation chamber being provided above the inlet end of the pressing chamber, a number of sets of guide plates arranged vertically and horizontally being rotatably connected inside the pre-separation chamber via a rotating shaft, a sludge hopper and a water receiving hopper being arranged sequentially from right to left at the lower end of the pre-separation chamber, and a feed pipe being provided between the sludge hopper and the inlet end of the pressing chamber.

[0007] Preferably, the sludge enters from the upper opening of the pre-separation chamber and flows downward under gravity. The rotation of the shaft and the guide plate adjusts the angle of the guide plate, promoting the initial separation of free water and sludge. The separated water flows along the surface of the guide plate to the water receiving hopper, while the thicker sludge slides into the sludge hopper. The sludge in the sludge hopper enters the pressing chamber through the feed pipe. The motor drives the screw conveyor shaft to rotate, pushing the sludge to the left and applying axial pressure. During the pressing process, water seeps out through the screen and falls into the water receiving tank below, achieving secondary solid-liquid separation. The dewatered sludge cake is finally discharged from the left end of the pressing chamber, and the frame provides stable support.

[0008] Preferably, the pitch of the screw conveyor shaft gradually decreases from the feed end to the discharge end, with a pitch variation range of 100-50 mm. A discharge port is provided at the end of the pressing chamber, and heating wires are evenly distributed in the pressing chamber jacket.

[0009] Preferably, a drain pipe is installed at the bottom of the water receiving hopper, the drain pipe is connected to the water receiving tank, and a drain valve is installed on the lower rear side of the water receiving tank.

[0010] Preferably, the pre-separation chamber is fixedly connected to support legs at both the front and rear ends, and the support legs are fixedly connected to the upper end of the frame.

[0011] Preferably, the front end of the pre-separation chamber is provided with an adjustment locking mechanism for adjusting the angle of the guide vane.

[0012] Preferably, the adjusting locking mechanism includes an adjusting handwheel and a connecting block. The adjusting handwheel is fixedly connected to the end of the rotating shaft. A toothed limiting block is fixedly connected to the outside of the adjusting handwheel. A pin is inserted into the connecting block. The pin is fixedly connected to the outer surface of the pre-separated outer surface. A spring is sleeved on the outside of the pin. A grooved outer bracket that matches the toothed limiting block is fixedly connected to the end of the connecting block near the adjusting handwheel.

[0013] Preferably, the surface of the deflector is provided with staggered water-guiding slopes.

[0014] The beneficial effects of this utility model are as follows: It adopts a dual treatment process combining pre-separation and pressing dewatering. The sludge undergoes preliminary solid-liquid separation through the guide plate in the pre-separation chamber, followed by deep dewatering in the pressing chamber, which greatly improves the dewatering efficiency. The pre-separation stage can remove some free water from the sludge, effectively reducing the subsequent pressing load. The adjustable angle design of the guide plate allows it to adapt to the treatment needs of sludge with different properties. The heating wire in the pressing chamber jacket causes the sludge to be subjected to gradually increasing extrusion pressure during transportation. At the same time, heating reduces the viscosity of the sludge, improving dewatering efficiency while greatly reducing energy consumption. Attached Figure Description

[0015] Figure 1 The diagram shown is a first three-dimensional structural schematic of the sludge pressing cement water pre-separation device of this utility model.

[0016] Figure 2 The diagram shown is a three-dimensional cross-sectional view of the sludge pressing cement water pre-separation device of this utility model.

[0017] Figure 3 The diagram shown is a three-dimensional structural schematic of the guide plate and the adjusting locking mechanism in the sludge pressing cement water pre-separation device of this utility model.

[0018] Figure 4 The diagram shown is a three-dimensional structural schematic of the adjusting and locking mechanism in the sludge pressing cement water pre-separation device of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Pressing chamber; 3. Screw conveyor shaft; 5. Motor; 6. Frame; 7. Water receiving tank; 8. Screen; 9. Pre-separation chamber; 10. Rotating shaft; 11. Guide plate; 12. Feed pipe; 13. Sludge hopper; 14. Water receiving hopper; 15. Drain pipe; 16. Support leg; 171. Adjusting handwheel; 172. Connecting block; 173. Toothed limit block; 174. Insert column; 175. Spring; 176. Grooved external clamp; 18. Water guide slope. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1-4This utility model provides an embodiment: a sludge pressing cement water pre-separation device, including a pressing chamber 1, a screw conveyor shaft 3 rotatably connected inside the pressing chamber 1, the right end of the screw conveyor shaft 3 passing through the pressing chamber 1 and fixedly connected to a motor 5, the pressing chamber 1 is installed inside a frame 6, a water receiving tank 7 aligned vertically with the pressing chamber 1 is installed at the upper bottom of the frame 6, a screen 8 is provided at the bottom of the pressing chamber 1, and a pre-separation chamber 9 is also included, the pre-separation chamber 9 with openings at the top and bottom is provided above the inlet end of the pressing chamber 1, a number of sets of guide plates 11 arranged vertically and horizontally are rotatably connected inside the pre-separation chamber 9 through a rotating shaft 10, a sludge hopper 13 and a water receiving hopper 14 are arranged sequentially from right to left at the lower end of the pre-separation chamber 9, a feed pipe 12 is provided between the sludge hopper 13 and the inlet end of the pressing chamber 1, the sludge improves the solid-liquid separation efficiency through the synergistic effect of the pre-separation chamber 9 and the pressing chamber 1, and the overall structure is compact, easy to install and maintain.

[0022] Please see Figures 1-2 In this embodiment, the pitch of the screw conveyor shaft 3 gradually decreases from the feed end to the discharge end, with a pitch variation range of 100-50mm. The gradual pitch design causes the sludge to be subjected to progressively increasing extrusion pressure. A discharge port is provided at the end of the pressing chamber 1. Heating wires are uniformly distributed in the interlayer of the pressing chamber 1. The heating wires can reduce the viscosity of the sludge, greatly improve the dewatering efficiency, and finally obtain a sludge cake with lower moisture content. A drain pipe 15 is provided at the bottom of the water receiving hopper 14. The drain pipe 15 is connected to the water receiving tank 7. A drain valve is provided on the lower rear end of the water receiving tank 7, realizing the centralized collection and discharge of separated water. The drain valve facilitates the periodic cleaning of sediment, prevents pipe blockage, and ensures long-term stable operation of the system. Support legs 16 are fixedly connected to both the front and rear ends of the pre-separation chamber 9. The support legs 16 are fixedly connected to the upper end of the frame 6. The support legs 16 enhance the stability of the pre-separation chamber 9, prevent the connection from loosening due to vibration, and facilitate the adjustment of the installation height to adapt to different site requirements.

[0023] Please see Figure 1 and Figures 3-4In this embodiment, an adjustment locking mechanism for adjusting the angle of the guide plate 11 is provided at the front end of the pre-separation chamber 9. The adjustment locking mechanism includes an adjustment handwheel 171 and a connecting block 172. The adjustment handwheel 171 is fixedly connected to the end of the rotating shaft 10. A toothed limiting block 173 is fixedly connected to the outside of the adjustment handwheel 171. A pin 174 is inserted into the connecting block 172. The pin 174 is fixedly connected to the outer surface of the pre-separation chamber 9. A spring 175 is sleeved on the outside of the pin 174. The connecting block 172 is close to... One end of the adjusting handwheel 171 is fixedly connected to a grooved outer bracket 176 that matches the toothed limit block 173, which realizes precise adjustment and reliable locking of the angle of the guide plate 11. The separation effect can be optimized according to different sludge characteristics. The spring 175 design makes adjustment easier and has a self-resetting function. The surface of the guide plate 11 is provided with staggered water guiding slopes 18, which increases the water flow path and effectively extends the separation time. The staggered slope structure can break up sludge clumps and significantly improve the separation efficiency of free water.

[0024] During operation, sludge enters from the upper opening of the pre-separation chamber 9 and flows downward under gravity, pulling the grooved outer retainer 176 forward. The connecting block 172 moves forward synchronously outside the insert 174, compressing the spring 175. The grooved outer retainer 176 separates from the toothed limiting block 173. Then, the adjusting handwheel 171 is rotated, causing the rotating shaft 10 to rotate the guide plate 11. The grooved outer retainer 176 is then released, and under the rebound force of the spring 175, it engages backward with the toothed limiting block 173, adjusting and fixing the angle of the guide plate 11 to promote the initial separation of free water and sludge. The separated water flows along the surface of the guide plate 11 to the water receiving hopper 14, and then is discharged into the water receiving tank 7 through the drain pipe 15. The thicker sludge slides into the sludge hopper 13. The sludge in the sludge hopper 13 enters the pressing chamber 1 through the feed pipe 12. The motor 5 drives the screw conveyor shaft 3 to rotate, pushing the sludge to the left and applying axial pressure. During the pressing process, water seeps out through the screen 8 and falls into the water receiving tank 7 below, realizing secondary solid-liquid separation. The heating wire in the jacket of the pressing chamber 1 moderately heats the sludge to reduce viscosity and improve dewatering efficiency. The dewatered sludge cake is finally discharged from the left end of the pressing chamber 1, and the frame 6 provides stable support.

[0025] Through the above steps, a dual treatment process combining pre-separation and pressing dewatering is adopted. The initial solid-liquid separation of sludge is achieved through the guide plate 11 in the pre-separation chamber 9, followed by deep dewatering in the pressing chamber 1, which greatly improves the dewatering efficiency. The pre-separation stage can remove some free water from the sludge, effectively reducing the subsequent pressing load. The adjustable angle design of the guide plate 11 allows it to adapt to the treatment needs of sludge with different properties. The heating wire in the jacket of the pressing chamber 1 causes the sludge to be subjected to gradually increasing extrusion pressure during transportation. At the same time, heating reduces the viscosity of the sludge, improving the dewatering efficiency while greatly reducing energy consumption. This solves the problem that existing devices do not have a pre-separation function, rely on a single extrusion method for dewatering, and still have a high moisture content in the dewatered sludge.

[0026] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A sludge pressing cement water pre-separation device, comprising a pressing chamber (1), a screw conveyor shaft (3) rotatably connected inside the pressing chamber (1), the right end of the screw conveyor shaft (3) passing through the pressing chamber (1) and fixedly connected to a motor (5), the pressing chamber (1) being installed inside a frame (6), a water receiving tank (7) aligned vertically with the pressing chamber (1) being installed at the upper bottom of the frame (6), and a screen (8) being provided at the bottom of the pressing chamber (1), characterized in that: It also includes a pre-separation chamber (9), and a pre-separation chamber (9) with openings at the top and bottom is provided above the inlet end of the pressing chamber (1). Several sets of guide plates (11) are rotatably connected in the pre-separation chamber (9) through a rotating shaft (10). A sludge hopper (13) and a water receiving hopper (14) are arranged sequentially from right to left at the lower end of the pre-separation chamber (9). A feed pipe (12) is provided between the sludge hopper (13) and the inlet end of the pressing chamber (1).

2. The sludge pressing cement water pre-separation device according to claim 1, characterized in that: The pitch of the screw conveyor shaft (3) gradually decreases from the feed end to the discharge end, and the pitch range is 100-50mm. The end of the pressing chamber (1) is provided with a discharge port, and the pressing chamber (1) is provided with uniformly distributed heating wires.

3. The sludge pressing cement water pre-separation device according to claim 1, characterized in that: A drain pipe (15) is installed at the bottom of the water receiving hopper (14), and the drain pipe (15) is connected to the water receiving tank (7). A drain valve is installed on the lower rear side of the water receiving tank (7).

4. The sludge pressing cement water pre-separation device according to claim 1, characterized in that: The pre-separation chamber (9) is fixedly connected to support legs (16) at both ends, and the support legs (16) are fixedly connected to the upper end of the frame (6).

5. The sludge pressing cement water pre-separation device according to claim 1, characterized in that: The pre-separation chamber (9) is equipped with an adjustment locking mechanism at the front end for adjusting the angle of the guide plate (11).

6. The sludge pressing cement water pre-separation device according to claim 5, characterized in that: The adjusting locking mechanism includes an adjusting handwheel (171) and a connecting block (172). The adjusting handwheel (171) is fixedly connected to the end of the rotating shaft (10). A toothed limit block (173) is fixedly connected to the outside of the adjusting handwheel (171). A pin (174) is inserted into the connecting block (172). The pin (174) is fixedly connected to the outer surface of the pre-separation chamber (9). A spring (175) is sleeved on the outside of the pin (174). A grooved outer bracket (176) matching the toothed limit block (173) is fixedly connected to one end of the connecting block (172) near the adjusting handwheel (171).

7. The sludge pressing cement water pre-separation device according to claim 1, characterized in that: The surface of the deflector plate (11) is provided with staggered water-guiding slopes (18).

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