Method for monitoring thickness and mass concentration of in-situ sampling mud layer of thickener

Abstract

The invention discloses a thickener in-situ sampling mud layer thickness and mass concentration monitoring method. A device for sampling from a thickener and a device for weighing are installed on the thickener; sampling from a specified height in the thickener by using sampling equipment; weighing equipment is used for weighing the obtained slurry; weighing information is transmitted to calculation equipment, the volume weight of the slurry is calculated, the mass concentration of the slurry is calculated according to the contrast mathematical relationship between the volume weight and the mass concentration of the slurry, and the position of the mud layer interface is determined according to the mass concentration of the slurry and the set mass concentration of the position of the mud layer interface or the volume weight threshold value. The measurement precision is high, and the precise operation of the thickener can be accurately guided.

Description

Technical Field

[0001] The invention relates to the field of thickener sampling monitoring, and in particular to a thickener in-situ sampling mud layer thickness and mass concentration monitoring method. Background Art

[0002] The thickener is a solid-liquid separation equipment based on gravity sedimentation. In order to facilitate the guidance of the thickener's sand feeding and releasing operations, it is necessary to monitor the mass concentration of the mud layer. The traditional method is to use a weight level meter. However, since the upper layer of the mud layer is a fluffy layer, the hammer of the weight level meter has a small insertion resistance and is easy to insert into the mud layer. Therefore, it is impossible to accurately determine whether the lowering position is in place; the weight is easy to get stuck, affecting the weight of the weight and the accuracy of the in-place detection; there is a rake frame in the thickener in a moving state, and the mud layer is in a moving state, which interferes with the weight in-place detection, all of which result in poor measurement accuracy of the weight level meter, and the inability to accurately obtain the mass concentration of the mud layer in the thickener, and cannot guide the refined operation of the thickener. Summary of the invention

[0003] In view of the above problems, the present invention provides a method for monitoring the thickness and mass concentration of mud layers by in-situ sampling of thickeners, which solves the problem that traditional methods cannot accurately obtain the position and mass concentration of mud layers.

[0004] The technical solution of the present invention is as follows:

[0005] A thickener in-situ sampling mud layer thickness and mass concentration monitoring method comprises the following steps:

[0006] S1. Install equipment for sampling from the thickener and equipment for weighing the thickener;

[0007] S2. Take samples from a specified height in the thickener using a sampling device;

[0008] S3. Weigh the taken slurry using a weighing device;

[0009] S4. The weighing information is transmitted to the computing device to calculate the bulk density of the slurry. The slurry mass concentration is solved by comparing the bulk density with the slurry mass concentration. The mud layer interface position is determined by comparing the slurry mass concentration with the set mud layer interface position mass concentration or bulk density threshold.

[0010] In a further technical solution, the sampling equipment at least includes a sampling container, a sampling pipeline and a pump body on the sampling pipeline.

[0011] In a further technical solution, in step S2, before sampling using the sampling equipment, the slurry stored in the sampling pipeline is discharged using power provided by a pump body.

[0012] In a further technical solution, when discharging the stored slurry, the replacement time of the slurry in the replacement pipeline is determined according to the volume of the sampling pipeline and the conveying capacity of the pump body, and the replacement is stopped when the pump body operation time is greater than or equal to the replacement time.

[0013] In a further technical solution, in step S2, each sampling ensures that the sampling container is full.

[0014] In a further technical solution, step S5 is also included: discharging the slurry in the sampling container and the sampling pipeline to prepare for the next sampling.

[0015] In a further technical solution, in step S5, the sampling pipeline sucks clean water from the clean water layer of the thickener to replace the slurry in the sampling pipeline, and when the pump running time is greater than or equal to the replacement time, the replacement is stopped.

[0016] In a further technical solution, the volume of the sampling container is determined according to a weighing error of a weighing device, and the error is less than 10%.

[0017] In a further technical solution, the volume of the sampling container is 1-100L.

[0018] In a further technical solution, the computing device is an industrial computer, and the weighing device inputs multi-point sampling data into the industrial computer, and uses numerical regression analysis of mass concentration and corresponding mud layer thickness to solve the spatial distribution of mud layer mass concentration in the thickener.

[0019] The beneficial effects of the present invention are:

[0020] 1. The sampling equipment is used to take samples at different designated heights in the thickener, and the slurry at the sampling positions is weighed respectively. The mass concentration of the sampled slurry can be quickly calculated using the computing equipment. By comparing the mass concentration with the set threshold, the mud layer interface position, i.e., mud layer thickness, can be accurately determined. The measurement accuracy is high, which is conducive to guiding the precise operation of the thickener;

[0021] 2. The use of conical or spindle-shaped inserted heavy hammers can overcome the resistance of the mud layer, deeply monitor the mass concentration structure inside the mud layer, and guide the operation of the thickener;

[0022] 3. The sampling hammer adopts the side feeding method to avoid sucking the bottom material and affecting the mass concentration detection;

[0023] 4. Setting up a drain pipe is conducive to draining the slurry in the sampling tube and the sample delivery tube, making it convenient for the next sampling;

[0024] 5. After testing, the sampled material is discharged into the central barrel of the thickener for flocculation and sedimentation. The sampling is hygienic and environmentally friendly and does not interfere with the normal operation of the thickener;

[0025] 6. When taking stepped multi-point sampling in the height direction of the mud layer in the thickener, mathematical regression analysis can be used to predict and analyze the mass concentration distribution of the mud layer in the entire warehouse, and accurately guide the operation of the thickener and the feeding and releasing of sand;

[0026] 7. The mass concentration is measured by weighing, and the heavy hammer is used for positioning. The thickener and the mud layer movement interference will not affect the mud layer detection accuracy;

[0027] 8. It can obtain fluids at different heights inside the thickener, realize fluid sampling at different depths inside the thickener, and is used to obtain accurate dynamic measurement data of turbidity of water samples in different sedimentation areas, providing an effective means for more comprehensive and accurate analysis of the thickening process of the thickener tailings;

[0028] 9. Through the sampling of hardware components and the calculation of computer software, it is possible to detect the height of the mud layer in real time and obtain more accurate location information;

[0029] 10. The sampling equipment is installed on the thickener in an assembled manner, with a simple structure, convenient disassembly and assembly, easy maintenance, low investment cost and operating cost, and low energy consumption;

[0030] 11. The sampling equipment can accurately obtain mud layer depth data, which is used to measure the mud layer height, improving the convenience and accuracy of monitoring results. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the first structure of the sampling device according to the embodiment of the present invention on the thickener;

[0032] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0033] Figure 3 It is a schematic diagram of the second structure of the sampling device on the thickener according to the embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1. Thickener; 2. Sampling container; 3. Sampling pipe; 4. Pump body; 5. Sampling valve; 6. Discharge port; 7. Overflow pipe; 8. Branch pipe. DETAILED DESCRIPTION

[0036] The embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0037] Example:

[0038] A thickener in-situ sampling mud layer thickness and mass concentration monitoring method comprises the following steps:

[0039] S1. A sampling device and a weighing device are installed on the thickener 1 from within the thickener 1;

[0040] In this embodiment, the sampling equipment includes a sampling container 2, a sampling pipe 3 and a pump body 4 on the sampling pipe 3;

[0041] S2. Before sampling, the pump body 4 is used to provide power to discharge the slurry stored in the sampling pipe 3 to avoid the slurry stored in the sampling pipe 3 affecting the test results, and the sampling equipment is used to sample from the specified height in the thickener 1;

[0042] S3. Weigh the taken slurry using a weighing device;

[0043] S4. The weighing information is transmitted to the industrial computer to calculate the bulk density of the slurry. The slurry mass concentration is solved by the mathematical relationship between the bulk density and the mass concentration of the slurry. The mud layer interface position is determined by the slurry mass concentration and the set mud layer interface position mass concentration or bulk density threshold; the spatial distribution of the mud layer mass concentration in the thickener is solved by numerical regression analysis of the mass concentration and the corresponding mud layer thickness;

[0044] S5. Drain the slurry in the sampling container 2 and the sampling pipe 3 back to the thickener 1 to prepare for the next sampling.

[0045] In another embodiment, if Figure 1-2 As shown, the sampling container 2 is arranged on the thickener 1, and the two ends of the sampling pipe 3 are respectively connected to the sampling container 2 and the thickener 1, a sampling valve 5 is arranged between the sampling container 2 and the sampling pipe 3, a discharge port 6 with a discharge valve is arranged at the bottom of the sampling container 2, and an overflow pipe 7 is arranged on one side of the sampling container 2.

[0046] The end of the sampling pipe 3 is provided with suction force through the pump body 4, the sampling valve 5 and the discharge port 6 are opened, and the slurry discharged from the sampling pipe 3 flows back to the thickener 1 through the discharge port 6 of the sampling container 2. When the stored slurry is discharged, the replacement time of the slurry in the replacement pipe is determined according to the volume of the sampling pipe 3 and the conveying capacity of the pump body 4. When the running time of the pump body 4 is greater than or equal to the replacement time, the mud layer slurry at the sampling position completely fills the sampling pipe 3, and the discharge valve is closed to stop the replacement.

[0047] In another embodiment, if Figure 1-2 As shown, when taking material in step S2, the discharge valve is closed so that the sampling container 2 is filled with the slurry at the sampling position, and the material taking is stopped until the overflow pipe overflows; wherein the volume of the sampling container 2 is determined according to the weighing error of the weighing equipment, the error is less than 10%, and is between 1-100L.

[0048] It is convenient to calculate the bulk density according to the volume of the sampling container 2 and the sampling mass. The volume of the sampling container 2 is determined to avoid a long test time due to an excessively large volume and a large error due to an excessively small volume.

[0049] In another embodiment, if Figure 1-2 As shown, in step S5, the sampling pipe 3 sucks clean water from the clean water layer of the thickener 1 to replace the slurry in the sampling pipe 3. When the running time of the pump body 4 is greater than or equal to the replacement time, the clean water completely fills the sampling pipe 3, and then the pump body 4 is closed to complete this sampling and prepare for the next sampling.

[0050] In another embodiment, if Figure 3 As shown, a plurality of sampling ports are arranged at different heights on the thickener 1, a branch pipe 8 connected to each sampling port is arranged at the end of the sampling pipeline 3, and a valve is arranged on each branch pipe 8.

[0051] When sampling, the valve on the designated branch pipe 8 can be opened to sample according to the location where sampling is required, so as to complete multi-point sampling measurement conveniently and quickly.

[0052] The above-mentioned embodiments only express the specific implementation of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A method for monitoring the thickness and mass concentration of mud layers by in-situ sampling of a thickener, characterized in that: The following steps are involved: S1. Install equipment for sampling from the thickener and equipment for weighing the thickener; S2. Take samples from a specified height in the thickener using a sampling device; S3. Weigh the taken slurry using a weighing device; S4. The weighing information is transmitted to the computing device to calculate the bulk density of the slurry. The slurry mass concentration is solved by comparing the bulk density with the slurry mass concentration. The mud layer interface position is determined by comparing the slurry mass concentration with the set mud layer interface position mass concentration or bulk density threshold.

2. The thickener in-situ sampling mud layer thickness and mass concentration monitoring method according to claim 1 is characterized in that: The sampling equipment at least comprises a sampling container, a sampling pipeline and a pump body on the sampling pipeline.

3. The thickener in-situ sampling mud layer thickness and mass concentration monitoring method according to claim 2 is characterized in that: In step S2, before sampling by the sampling equipment, the slurry stored in the sampling pipeline is discharged by using the pump body to provide power.

4. The thickener in-situ sampling mud layer thickness and mass concentration monitoring method according to claim 3 is characterized in that: When discharging the stored slurry, the replacement time of the slurry in the replacement pipeline is determined according to the volume of the sampling pipeline and the conveying capacity of the pump body. When the running time of the pump body is greater than or equal to the replacement time, the replacement is stopped.

5. The thickener in-situ sampling mud layer thickness and mass concentration monitoring method according to claim 2 is characterized in that: In step S2, each sampling is performed to ensure that the sampling container is full.

6. The thickener in-situ sampling mud layer thickness and mass concentration monitoring method according to claim 2 is characterized in that: The method further comprises step S5: discharging the slurry in the sampling container and the sampling pipe to prepare for the next sampling.

7. The thickener in-situ sampling mud layer thickness and mass concentration monitoring method according to claim 6 is characterized in that: In step S5, the sampling pipeline sucks clean water from the clean water layer of the thickener to replace the slurry in the sampling pipeline. When the pump running time is greater than or equal to the replacement time, the replacement is stopped.

8. The thickener in-situ sampling mud layer thickness and mass concentration monitoring method according to claim 5 is characterized in that: The volume of the sampling container is determined according to the weighing error of the weighing device, and the error is less than 10%.

9. The thickener in-situ sampling mud layer thickness and mass concentration monitoring method according to claim 8 is characterized in that: The volume of the sampling container is 1-100L.

10. The thickener in-situ sampling mud layer thickness and mass concentration monitoring method according to claim 1, characterized in that: The computing device is an industrial computer. The weighing device inputs multi-point sampling data into the industrial computer, and uses numerical regression analysis of mass concentration and corresponding mud layer thickness to solve the spatial distribution of mud layer mass concentration in the thickener.

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