Sludge dewatering machine for stone processing

Abstract

The utility model discloses a kind of sludge dewatering machines for stone processing, including fixed block, base and support leg. Fixed block is equipped with double-layer vibrating screen to realize impurity grading pre-filtering, the dehydration unit of the double-screw dehydration unit formed by the variable pitch screw shaft and stationary outer cylinder built-in in base, dehydration pressure is dynamically adjusted by hydraulic back pressure device, inhibit laminated sheet gap blockage in combination with high-pressure washing system, effectively solve the problem that stone sludge fine particle is easily blocked, dehydration is not complete. The equipment realizes continuous efficient dehydration, significantly reduces the moisture content of mud cake, and the filtrate can be recycled for production process. It has the characteristics of compact structure and easy maintenance, and is suitable for large-scale resource treatment of high-hardness stone processing sludge.

Description

Technical Field

[0001] This utility model relates to the field of stone processing, and in particular to a sludge dewatering machine for stone processing. Background Technology

[0002] During stone processing, cutting, grinding and other processes generate a large amount of sludge containing micron-sized stone powder, coolant and water. Sludge dewatering machines are a type of continuously operating sludge treatment equipment. Common models include centrifugal, plate and frame, and screw press types. Among them, the screw press dewatering machine uses the strong extrusion force generated by the change of screw diameter and pitch, as well as the tiny gap between the moving ring and the fixed ring, to squeeze and dewater the sludge.

[0003] Traditional dewatering equipment suffers from frequent clogging due to the fine size of stone powder particles and their tendency to wear down filter cloths, and its intermittent operation results in low efficiency. Centrifugal dewatering machines, on the other hand, are energy-intensive and have poor separation effects on fine particles. Among existing technologies, screw press dewatering machines have the advantage of continuous operation, but when directly processing stone sludge, they still face problems such as incomplete screening leading to screw shaft jamming and stone powder caking in the gaps between the stacked plates, resulting in high moisture content (>70%) in the dewatered sludge cake and a significant increase in equipment maintenance costs. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a sludge dewatering machine for stone processing.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] This utility model discloses a sludge dewatering machine for stone processing, comprising a machine body, the machine body including:

[0007] A fixed block is provided with a feed inlet at its top. A first vibrating screen and a second vibrating screen are installed inside the feed inlet. A vibrating motor is installed at one end of each of the first and second vibrating screens. A switch door is installed at one end of the fixed block.

[0008] A base is installed at the bottom of the fixed block. A stacked screw cylinder is installed inside the base. A screw shaft and a drive device are installed inside the stacked screw cylinder. A discharge port is installed at one end of the base.

[0009] A support leg is installed at the bottom end of the base, and an anti-slip pad is installed at the bottom end of the support leg.

[0010] As a preferred embodiment of this utility model, the mesh size of the first vibrating screen is smaller than that of the second vibrating screen, and the first vibrating screen is installed on the top side of the second vibrating screen.

[0011] As a preferred embodiment of this utility model, the fixing block and the base are internally connected, and the second vibrating screen is installed directly above the stacked screw cylinder.

[0012] As a preferred embodiment of this utility model, the discharge port is installed on one side of the stacked screw cylinder, and the spiral shaft is used to drive the stacked screw cylinder to rotate.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] This utility model is a sludge dewatering machine for stone processing. It effectively intercepts impurities of different particle sizes through a double-layer vibrating screen for graded pre-filtration, significantly reducing the risk of screw shaft jamming. Combined with the opening and closing door and timed cleaning, it prevents the vibrating screen from clogging and ensures continuous and stable operation of the equipment. The screw shaft and the stacked screw drum work together to enhance the axial compression and shearing dewatering effect of the sludge and improve the density of the sludge cake. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a partial structural cross-sectional view of the present invention;

[0018] In the diagram: 1. Machine body; 2. Fixing block; 201. Feed inlet; 202. First vibrating screen; 203. Second vibrating screen; 204. Vibrating motor; 205. Opening and closing door; 3. Base; 301. Stacked screw drum; 302. Screw shaft; 303. Discharge port; 4. Support leg. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0020] In the attached diagram, all identical reference numerals refer to the same components.

[0021] like Figure 1-2 As shown, this utility model provides a sludge dewatering machine for stone processing. The top of the fixed block 2 is provided with a feed inlet 201 for receiving the raw sludge generated during stone processing. Two layers of vibrating screens are installed inside the feed inlet 201 from top to bottom.

[0022] The upper vibrating screen uses stainless steel perforated plates with a screen hole diameter of 3 mm to intercept large particles of impurities such as stones and debris.

[0023] The lower vibrating screen uses a polyurethane woven screen with a screen aperture of 0.5 mm to further intercept fine impurities such as fibers and plastic fragments.

[0024] Two vibrating motors 204 are connected to the vibrating screen, with the vibration frequency set to 25 Hz to ensure that impurities slide down the inclined screen surface into the waste bin. A closable inspection door is provided on the side of the fixed block 2 for easy cleaning of the screen.

[0025] Furthermore, the base 3 is equipped with a stacked screw dehydration unit, the core components of which include:

[0026] The stationary outer cylinder is made of stainless steel, and the inner wall is coated with tungsten carbide to enhance wear resistance. The cylinder body has multiple rows of filtrate holes.

[0027] The spiral shaft 302 is installed inside the outer cylinder, and the pitch of the spiral blades gradually decreases from the feed end to the discharge end, forming a progressive compression cavity.

[0028] The drive motor adjusts the speed of the screw shaft 302 via a frequency converter, controlling the range to 2 to 10 revolutions per minute;

[0029] The dehydrated mud cake is discharged from the discharge port 303 at the left end of the base 3. The thickness of the mud cake is adjusted to 10 to 30 mm by the back pressure device.

[0030] Furthermore, four height-adjustable support legs 4 are welded to the four corners of the base 3, and anti-slip rubber pads are installed on the bottom to ensure the stability of the equipment operation.

[0031] Workflow: Stone processing sludge first enters a double-layer vibrating screen through inlet 201 for grading and filtration: the upper vibrating screen intercepts stones and debris with a particle size greater than 3 mm, and the lower vibrating screen further removes fibers and impurities larger than 0.5 mm; the pre-screened sludge enters the screw press dewatering unit through an inclined guide plate. Driven by the screw shaft 302, the sludge sequentially passes through the concentration section (free water is discharged through the outer cylinder filter holes, and the solid content is increased to 8%) and the pressing section (the screw pitch gradually decreases and a hydraulic back pressure device applies a pressure of 0.8 MPa to form a dense sludge cake with a moisture content of 60%-65%). Finally, the sludge cake is discharged from outlet 303, and the filtrate is settled and reused in the cutting process; during equipment operation, the screen can be washed every 2 hours by opening the switch door 205, and the screen should be cleaned regularly to ensure continuous and stable dewatering.

[0032] This utility model is a sludge dewatering machine for stone processing. It effectively intercepts impurities of different particle sizes through a double-layer vibrating screen for graded pre-filtration, significantly reducing the risk of jamming of the spiral shaft 302. Combined with the opening and closing door 205 for timed cleaning, it prevents the vibrating screen from clogging and ensures continuous and stable operation of the equipment. The spiral shaft 302 and the stacked screw drum 301 work together to enhance the axial compression and shearing dewatering effect of the sludge and improve the density of the sludge cake.

[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sludge dewatering machine for stone processing, comprising a machine body (1), characterized in that, The main body of the machine (1) includes: A fixed block (2) is provided with a feed inlet (201) at its top. A first vibrating screen (202) and a second vibrating screen (203) are installed inside the feed inlet (201). A vibrating motor (204) is installed at one end of both the first vibrating screen (202) and the second vibrating screen (203). A switch door (205) is installed at one end of the fixed block (2). The base (3) is installed at the bottom of the fixed block (2). The base (3) is equipped with a stacked screw cylinder (301). The stacked screw cylinder (301) is equipped with a screw shaft (302) and a drive device. The base (3) is equipped with a discharge port (303) at one end. Support leg (4) is installed at the bottom end of the base (3), and the bottom end of the support leg (4) is equipped with an anti-slip pad.

2. The sludge dewatering machine for stone processing according to claim 1, characterized in that, The mesh count of the first vibrating screen (202) is smaller than that of the second vibrating screen (203), and the first vibrating screen (202) is installed on the top side of the second vibrating screen (203).

3. The sludge dewatering machine for stone processing according to claim 1, characterized in that, The fixing block (2) and the base (3) are internally connected, and the second vibrating screen (203) is installed directly above the stacked screw cylinder (301).

4. The sludge dewatering machine for stone processing according to claim 1, characterized in that, The discharge port (303) is installed on one side of the stacked screw barrel (301), and the screw shaft (302) is used to drive the stacked screw barrel (301) to rotate.

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