Transition layer coal slime concentration effect evaluation method

Abstract

The invention belongs to the technical field of coal slime water treatment, and particularly relates to a transition layer coal slime concentration effect evaluation method, which comprises a monitoring system, the monitoring system comprises a water sample sampling rod and a support, an internal water channel with an inlet and outlet at the lower end is constructed in the water sample sampling rod, and a visual window capable of observing the internal water channel is arranged on the water sample sampling rod. The water sampling rod is connected with a gate valve capable of controlling the on-off of an internal water channel; the water sampling rod is held by a lifting device on the bracket and is vertical to the water surface to be inserted into coal slime water; according to the monitoring system, the problems of subjectivity and uncertainty of manual operation when field operators of a traditional coal preparation plant observe the thickness and the turbidity degree of a transition layer of a concentration tank with naked eyes through a probe rod and judge the production and operation state of coal slime flocculation and sedimentation are solved, and the danger coefficient that workers stay on the edge of a concentrator to fall into water is avoided; meanwhile, the monitoring system is simple to operate, and the monitoring result is visual and visible.

Description

Technical Field

[0001] The present invention belongs to the technical field of slime water treatment, and particularly relates to a method for evaluating the thickening effect of slime in the transition layer. Background Art

[0002] Accurately identifying the flocculation effect of slime water in the thickener is of great significance for guiding flocculant dosing, reducing chemical consumption, optimizing the production process, and improving the efficiency of slime water treatment. The flocculation sedimentation of slime water involves the addition of flocculants, equipment status, the skill level of operators, and the influence of other external factors. The complexity and relevance of the above factors lead to a complex, uncertain, and difficult-to-transparent sedimentation process, making it a long-term "black box problem" to identify the flocculation effect of slime water in the thickener. The diameter of a conventional slime water thickener is 30 - 45 m, and the depth is 3 - 5 m. The sedimentation and thickening process of slime water in the thickener can generally be divided into four zones from top to bottom, as shown in the appendix Figure 1 That is, zone A is the clarification zone, zone B is the free sedimentation zone, zone C is the transition layer, and zone D is the compression zone. Currently, on-site operators of slime water thickeners in coal preparation plants generally use a rough method to estimate the sedimentation effect. They mainly insert a rough-surfaced probe obliquely into the slime water and roughly estimate the flocculation state in the thickener by visually observing the distance of the slime stained on the probe taken out of the water. However, the silt marks on the surface of the probe are easily diluted in the water during the extraction process, and there are large errors and dependence on manual experience due to the oblique insertion into the water. Summary of the Invention

[0003] The present invention aims to solve the problem that it is difficult to evaluate the thickening effect of slime water in the thickener during the on-site production process of coal preparation plants.

[0004] The present invention provides the following technical solution: A method for evaluating the thickening effect of slime in the transition layer, comprising the following steps:

[0005] S1: Build a monitoring system. The monitoring system includes a water sample sampling rod and a bracket. An internal water channel with an entrance and an exit at the lower end is constructed in the water sample sampling rod. A viewing window for observing the internal water channel is provided on the water sample sampling rod, and a gate valve capable of controlling the on-off of the internal water channel is connected to the water sample sampling rod; the water sample sampling rod is held by a lifting device on the bracket, and the bracket is installed on the pool wall of the thickener so that the water sample sampling rod hangs vertically above the water surface of the thickener;

[0006] S2: Control the gate valve to remain open, and the lifting device immerses the water sample sampling rod into the slime water, with the gate valve below the sampling water level;

[0007] S3: Control the gate valve to close, and the lifting device lifts the water sample sampling rod out of the water surface;

[0008] S4: Observe the slime water inside the water sample sampling rod through the visual window, and find the boundary line from clear to turbid; judge the height where the boundary line is located by aggregating the scale lines, so as to judge the thickness of the slime water transition layer in the thickener.

[0009] S5: Control the opening of the gate valve to drain the slime water inside the water sample sampling rod.

[0010] Further, the gate valve includes a valve body, the valve body is connected to the water sample sampling rod, and the channel inside the valve body is communicated with the internal water channel of the water sample sampling rod; two baffle plates are connected in the channel of the valve body through a central rotating shaft bracket, and a sealing gasket is arranged on the inner wall of the channel of the valve body. The baffle plates are on the top and the sealing gasket is on the bottom. When the two baffle plates are closed, they fit with the sealing gasket to cut off the channel of the valve body, and when the two baffle plates are opened, the channel of the valve body is opened.

[0011] Further, upper traction wires and lower traction wires are connected to the baffle plates. The upper traction wires on the two baffle plates cross upward and then pass through the upper traction wire through holes of the valve body and into the wire guiding grooves of the valve body. The lower traction wires on the two baffle plates pass downward through the lower traction wire through holes of the valve body and into the wire guiding grooves of the valve body; wiring rings are arranged on the water sample sampling rod, and the upper traction wires and the lower traction wires pass through the wiring rings after passing through the valve body and are led to the upper part of the water sample sampling rod.

[0012] Further, the lifting device includes two vertical rows of rollers, and the water sample sampling rod is clamped between the two rows of rollers. The two rows of rollers include driving rollers and driven rollers. The driving rollers are connected to a torque input mechanism, and the torque input mechanism drives the driving rollers to rotate to drive the water sample sampling rod to move up and down.

[0013] Further, the torque input mechanism includes a motor, a driving pulley and a driven pulley. The driving pulley is installed on the rotating shaft of the motor, the driven pulley is coaxially connected with the driving roller, and the driving pulley and the driven pulley are connected by a belt.

[0014] Further, the two rows of rollers are respectively installed on connecting frames that can move in a direction perpendicular to the water sample sampling rod, and springs are connected between the connecting frames and the seat bodies of the connecting frames.

[0015] Further, scale lines are arranged on the water sample sampling rod within the line of sight of the observation visual window, and the scale lines are parallel to the length of the water sample sampling rod.

[0016] Further, the water sample sampling rod is a highly transparent polycarbonate plastic round tube.

[0017] Compared with the prior art, the advantages of the present invention are as follows:

[0018] It avoids the subjectivity and uncertainty of manual operation in which the on-site operators of traditional coal preparation plants observe the thickness and turbidity of the transition layer in the thickening tank with the naked eye through a probe to judge the production and operation status of coal slime flocculation and sedimentation, and avoids the risk of workers staying at the edge of the thickener and falling into the water. At the same time, the monitoring system is simple to operate, the monitoring results are intuitively visible, it has standardized assembly, strong practicality, low cost, and easy promotion. It also meets the requirements of accuracy, efficiency, and safety, and has broad application prospects in the field of coal slime water treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the installation diagram of the transition layer coal slime concentration effect evaluation method;

[0020] Figure 2 This is a schematic diagram of a water sampling rod and a gate valve;

[0021] Figure 3 is a schematic diagram of a gate valve;

[0022] Figure 4 This is a schematic diagram of the gate valve opening and closing;

[0023] Figure 5 A schematic diagram of the lifting device.

[0024] In the figure: 1-water sampling rod; 2-bracket; 3-gate valve; 3.1-valve body; 3.2-blocking piece; 3.3-sealing gasket; 3.4-upper traction line; 3.5-lower traction line; 3.6-upper traction line through hole; 3.7-lower traction line through hole; 3.8-rotating shaft bracket; 4-lifting device; 4.1-driving roller; 4.2-driven roller; 4.3-driving pulley; 4.4-driven pulley; 4.5-connecting frame; 4.6-spring; 4.7-belt; 4.8-motor; 5-high-brightness reflective 5E scale label sticker. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] like Figure 1As shown: A method for evaluating the concentration effect of transitional slime, including a monitoring system. The monitoring system includes a water sample sampling rod 1 and a bracket 2. An internal water channel with an inlet and outlet at the lower end is constructed in the water sample sampling rod 1. A viewing window capable of observing the internal water channel is provided on the water sample sampling rod 1. Scale lines are provided on the water sample sampling rod 1 within the line of sight for observing the viewing window, and the scale lines are parallel to the length of the water sample sampling rod 1. A gate valve 3 capable of controlling the on / off of the internal water channel is connected to the water sample sampling rod 1. The water sample sampling rod 1 is held perpendicular to the water surface and inserted into the slime water by a lifting device 4 on the bracket 2.

[0027] The lifting device 4 carried by the bracket 2 drives the water sample sampling rod 1 to perform the sampling work, which can maintain the stable operation of the lifting device 4 at a sufficient distance from the edge of the overflow tank of the thickener, ensuring that the water sample sampling rod 1 is vertically sampled, improving the accuracy of sampling, and at the same time reducing the risk of personnel staying at the edge of the deep pool of the thickener.

[0028] As Figure 2 shown: Specifically, the water sample sampling rod 1 is a high-transparency polycarbonate plastic round tube. The turbidity of the slime water in the tube can be directly observed with the naked eye through the tube wall. The length of a single water sample sampling rod 1 is 1000 mm, the outer diameter of the tube is 40 mm, the tube wall is 2 mm, and the inner diameter is 36 mm. Threads are engraved at both ends of the water sample sampling rod 1, and two water sample sampling rods 1 can be screwed together to extend the water sample sampling rod 1 according to the sampling depth. A sticker 5 with a highly reflective 5E type scale mark is pasted on the tube wall of the water sample sampling rod 1 to ensure the accuracy of night identification.

[0029] As Figure 3 shown: The gate valve 3 includes a valve body 3.1. The valve body 3.1 is connected to the water sample sampling rod 1, and the channel in the valve body 3.1 is communicated with the internal water channel of the water sample sampling rod 1. A threaded interface is provided on the valve body 3.1, and the valve body 3.1 is threadedly connected to the lower end of the water sample sampling rod 1. Two baffle plates 3.2 are connected in the channel of the valve body 3.1 through a central rotating shaft bracket 3.8. A sealing gasket 3.3 is provided in a circle on the inner wall of the channel of the valve body 3.1. The baffle plates 3.2 are on the upper side and the sealing gasket 3.3 is on the lower side. When the two baffle plates 3.2 are closed, they fit with the sealing gasket 3.3 to cut off the channel of the valve body 3.1, and when the two baffle plates 3.2 are opened, the channel of the valve body 3.1 is opened.

[0030] As Figure 4As shown in the figure: An upper traction wire 3.4 and a lower traction wire 3.5 are connected to the baffle 3.2. The upper traction wires 3.4 on the two baffles 3.2 cross upward and then pass through the upper traction wire through-hole 3.6 of the valve body 3.1 and enter the wire guiding groove of the valve body 3.1. The lower traction wires 3.5 on the two baffles 3.2 pass downward through the lower traction wire through-hole 3.7 of the valve body 3.1 and enter the wire guiding groove of the valve body 3.1. A wiring loop is arranged on the water sample sampling rod 1. The upper traction wire 3.4 and the lower traction wire 3.5 pass through the wiring loop after passing through the valve body 3.1 and are led to the upper part of the water sample sampling rod 1. The upper traction wire 3.4 and the lower traction wire 3.5 are made of strong, wear-resistant, high-strength and non-elastic crystal traction wires. Under the action of the upper traction wire 3.4, the two baffles 3.2 can be opened. Under the action of the lower traction wire 3.5, the two baffles 3.2 can be closed on the sealing gasket 3.3 to realize the internal sealing of the valve body 3.1.

[0031] As Figure 5 As shown in the figure: The lifting device 4 includes two vertical columns of rollers. Each column has 3 rollers. Rubber grooves adapted to the outer wall of the water sample sampling rod 1 are provided on the circumferential surface of the rollers. The water sample sampling rod 1 is clamped between the two columns of rollers. The two columns of rollers include a driving roller 4.1 and a driven roller 4.2. The driving roller 4.1 is connected to a torque input mechanism. The torque input mechanism drives the driving roller 4.1 to rotate and drives the water sample sampling rod 1 to move up and down.

[0032] The torque input mechanism includes a motor 4.8, a driving pulley 4.3 and a driven pulley 4.4. The driving pulley 4.3 is installed on the rotating shaft of the motor 4.8. The driven pulley 4.4 is coaxially connected to the driving roller 4.1. The driving pulley 4.3 and the driven pulley 4.4 are connected by a belt 4.7. Under the drive of the motor 4.8, the driving pulley 4.3 and the driven pulley 4.4, the driving roller 4.1 controls the rising and falling of the water sample sampling rod 1 at a certain rotational speed.

[0033] The two columns of rollers are respectively installed on a connecting frame 4.5 that can move in a direction perpendicular to the water sample sampling rod 1. A spring 4.6 is connected between the connecting frame 4.5 and the seat body of the connecting frame 4.5. The clamping of the water sample sampling rod 1 and its rising and falling are realized by squeezing the roller group through the spring 4.6.

[0034] The following steps are completed by using a monitoring system:

[0035] S1: The bracket 2 is installed on the pool wall of the thickener so that the water sample sampling rod 1 is vertically suspended above the water surface of the thickener;

[0036] S2: The upper traction wire 3.4 and the lower traction wire 3.5 are wound and released to keep the gate valve 3 open. The lifting device 4 slowly immerses the water sample sampling rod 1 into the coal slurry water. The gate valve 3 is located below the sampling water level;

[0037] S3: Retract and extend the upper towing line 3.4 and the lower towing line 3.5 to close the gate valve 3, wait for a short time for the coal slime water to stabilize in the water sample sampling rod 1, and the lifting device 4 slowly lifts the water sample sampling rod 1 out of the water surface;

[0038] S4: Observe the coal slime water in the water sample sampling rod 1 through the visual window to find the boundary line from clear to turbid; use the set scale line to judge the height where the boundary line is located, and thus judge the thickness of the coal slime water transition layer in the thickener;

[0039] S5: Retract and extend the upper towing line 3.4 and the lower towing line 3.5 to open the gate valve 3, drain the coal slime water in the water sample sampling rod 1; clean the inside and outside of the used water sample sampling rod 1 to prepare for the next use; if necessary, perform necessary maintenance on the water sample sampling rod 1 and the gate valve 3.

[0040] Through the above steps, the transition layer coal slime concentration effect evaluation method can be effectively used to monitor the thickness of the transition layer inside the thickener, thereby judging the flocculation effect of the coal slime water, providing a basis for the use of flocculants, and optimizing the coal slime water treatment process.

[0041] Precautions for the transition layer coal slime concentration effect evaluation method during use are as follows:

[0042] (1) Throughout the process, ensure the safety of the operator, especially when operating at the edge of the thickener, to avoid the risk of falling into the water;

[0043] (2) Regularly check each part of the system to ensure they are in good working condition;

[0044] (3) Adjust the speed of the motor according to the actual situation to ensure the smooth lifting and lowering of the water sample sampling rod 1;

[0045] (4) When the water sample sampling rod 1 is rising, pay attention to avoiding the mixing of the coal slime in the water sample due to shaking, which may affect the accuracy of the measurement results.

[0046] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for evaluating the concentration effect of intermediate layer slime, characterized in that It includes the following steps: S1: Set up a monitoring system. The monitoring system includes a water sample sampling rod (1) and a support (2). An internal water channel with an entrance and an exit at the lower end is constructed in the water sample sampling rod (1). A viewing window capable of observing the internal water channel is provided on the water sample sampling rod (1). A gate valve (3) capable of controlling the on / off of the internal water channel is connected to the water sample sampling rod (1). The water sample sampling rod (1) is held by a lifting device (4) on the support (2). The support (2) is installed on the wall of the thickener so that the water sample sampling rod (1) hangs vertically above the water surface of the thickener. S2: Control the gate valve (3) to remain open. The lifting device (4) immerses the water sample sampling rod (1) into the slime water, and the gate valve (3) is located below the sampling water level. S3: Control the gate valve (3) to close. The lifting device (4) lifts the water sample sampling rod (1) out of the water surface. S4: Observe the slime water in the water sample sampling rod (1) through the viewing window to find the boundary line from clear to turbid. Combine the scale lines to judge the height where the boundary line is located, and thus judge the thickness of the transition layer of the slime water in the thickener. S5: Control the gate valve (3) to open and empty the slime water in the water sample sampling rod (1).

2. The evaluation method for the concentration effect of intermediate layer slime according to claim 1, wherein: The gate valve (3) includes a valve body (3.1). The valve body (3.1) is connected to the water sample sampling rod (1). The channel in the valve body (3.1) is communicated with the internal water channel of the water sample sampling rod (1). Two baffle plates (3.2) are connected in the channel of the valve body (3.1) through a central rotating shaft support (3.8). A sealing gasket (3.3) is arranged in a circle on the inner wall of the channel of the valve body (3.1). The baffle plates (3.2) are on the upper side and the sealing gasket (3.3) is on the lower side. When the two baffle plates (3.2) are closed, they fit with the sealing gasket (3.3) to cut off the channel of the valve body (3.1). When the two baffle plates (3.2) are opened, the channel of the valve body (3.1) is opened.

3. The evaluation method for the slime thickening effect of the transition layer according to claim 2, wherein: Upper traction lines (3.4) and lower traction lines (3.5) are connected to the baffle plates (3.2). The upper traction lines (3.4) on the two baffle plates (3.2) cross upward and then pass through the upper traction line through hole (3.6) of the valve body (3.1) and into the lead guiding groove of the valve body (3.1). The lower traction lines (3.5) on the two baffle plates (3.2) pass downward through the lower traction line through hole (3.7) of the valve body (3.1) and into the lead guiding groove of the valve body (3.1). Wiring rings are arranged on the water sample sampling rod (1). The upper traction lines (3.4) and the lower traction lines (3.5) pass through the wiring rings after passing out of the valve body (3.1) and are led to the upper part of the water sample sampling rod (1).

4. The method for evaluating the thickening effect of the transition layer slime according to claim 1 or 3, characterized in that: The lifting device (4) includes two vertical columns of rollers. The water sample sampling rod (1) is clamped between the two columns of rollers. The two columns of rollers include driving rollers (4.1) and driven rollers (4.2). The driving rollers (4.1) are connected to a torque input mechanism, and the torque input mechanism drives the driving rollers (4.1) to rotate to drive the water sample sampling rod (1) to move up and down.

5. The evaluation method for the slime concentration effect of the transition layer according to claim 4, characterized in that: The torque input mechanism described above includes a motor (4.8), a driving pulley (4.3) and a driven pulley (4.4). The driving pulley (4.3) is installed on the rotating shaft of the motor (4.8). The driven pulley (4.4) is coaxially connected to the driving roller (4.1). The driving pulley (4.3) and the driven pulley (4.4) are connected by a belt (4.7).

6. The evaluation method for the slime thickening effect of the transition layer according to claim 5, characterized in that: Two columns of the rollers described above are respectively installed on a connecting frame (4.5) capable of moving in a direction perpendicular to the water sample sampling rod (1). A spring (4.6) is connected between the connecting frame (4.5) and the seat body of the connecting frame (4.5).

7. A method for evaluating the concentration effect of intermediate layer slime, according to claim 3, wherein: Scale lines are provided on the water sample sampling rod (1) within the sight range of the observation viewing window, and the scale lines are parallel to the length of the water sample sampling rod (1).

8. A method for evaluating the concentration effect of intermediate layer slime, according to claim 1, wherein: The water sample sampling rod (1) is a high-transparency polycarbonate plastic round tube.

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