Weighing type mud layer thickness automatic monitoring system of thickener

Abstract

The utility model discloses a thickener weighing type mud layer thickness automatic monitoring system, which comprises a monitoring part, a sampling part and a thickener, the monitoring part comprises a constant volume hopper, a scale hopper support, a weighing sensor and an industrial personal computer, the scale hopper support is arranged at the top of the thickener, the constant volume hopper is arranged on the scale hopper support, a discharge valve is arranged at the bottom of the scale hopper support, the weighing sensor is connected with the constant volume hopper, and the industrial personal computer is connected with the sampling part. The weighing sensor is used for weighing the constant volume hopper, and a signal transmission line is arranged between the industrial personal computer and the weighing sensor; the sampling part comprises a sampling pipe, a sample conveying pipe, a sampling pump and a positioning extraction assembly, two ends of the sample conveying pipe are respectively connected with the constant volume hopper and the sampling pipe, a sampling valve is arranged at one end, connected with the constant volume hopper, of the sample conveying pipe, the positioning extraction assembly is connected with the sampling pipe and used for determining a sampling position for sampling, and the sampling pump is arranged in the middle of the sample conveying pipe. The weighing type mud layer thickness automatic monitoring system of the thickener can determine the thickness of the mud layer and the mass concentration of the corresponding position, and can reliably guide the thickener to carry out sand prevention operation.

Description

Technical Field

[0001] This utility model relates to the field of thickener sampling and monitoring, and in particular to an automatic monitoring system for the thickness of mud layer by weighing in a thickener. Background Technology

[0002] A thickener is a solid-liquid separation device based on gravity settling. To facilitate the sand feeding and discharging operation of the thickener, it is necessary to monitor the thickness of the mud layer. The traditional method is to use a weighted level gauge. However, since the upper layer of the mud layer is a loose layer, the hammer of the weighted level gauge has low 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, resulting in poor measurement accuracy. Furthermore, it is also impossible to accurately obtain the mass concentration of the mud layer inside the thickener, which cannot guide the refined operation of the thickener. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a weighing-type automatic mud layer thickness monitoring system for thickeners, which can determine the location and mass concentration of mud layers with small errors and can reliably guide thickeners in sand control operations.

[0004] The technical solution of this utility model is as follows:

[0005] An automatic monitoring system for mud layer thickness by weighing in a thickener includes a monitoring unit, a sampling unit, and a thickener. The monitoring unit includes a constant volume hopper, a weighing hopper support, a weighing sensor, and an industrial control computer. The weighing hopper support is located on top of the thickener, and the constant volume hopper is located on the weighing hopper support with a discharge valve at the bottom. The weighing sensor is connected to the constant volume hopper for weighing the constant volume hopper. A signal transmission line is provided between the industrial control computer and the weighing sensor.

[0006] The sampling unit includes a sampling tube, a delivery tube, a sampling pump, and a positioning extraction component. The two ends of the delivery tube are respectively connected to a volume-fixing hopper and a sampling tube. A sampling valve is provided at the end of the delivery tube connected to the volume-fixing hopper. The positioning extraction component is connected to the sampling tube and is used to determine the sampling position for sampling. The sampling pump is located in the middle of the delivery tube.

[0007] In a further technical solution, the positioning and extraction component includes a tube winding support, a tube winding machine, and a sampling weight. The tube winding support is located on the top of the thickener, the tube winding machine is located on the tube winding support, the sampling tube is a flexible hose wound around the tube winding machine, and the sampling weight is located at the end of the sampling tube.

[0008] In a further technical solution, the sampling hammer has a conical structure with a sampling port on the side that connects to the sampling tube.

[0009] In a further technical solution, the end of the sample delivery tube near the volume-fixing hopper is also provided with an emptying pipe, and an emptying valve is provided on the emptying pipe.

[0010] In a further technical solution, the volume of the fixed-volume hopper is 1-100L.

[0011] The beneficial effects of this utility model are:

[0012] 1. Slurry can be sampled from the thickener to the constant volume hopper by a sampling pump. The weighing sensor transmits the weighing information of the constant volume hopper to the industrial control computer. The industrial control computer can calculate the bulk density of the slurry based on the volume of the slurry in the constant volume hopper and the weighing information. It can calculate the mud layer mass concentration at the corresponding sampling location, compare it with the set threshold, and determine whether there is contact with the mud layer. Through measurement, the mud layer interface position can be determined, the mud layer height can be accurately determined, and the mass concentration at the mud layer position can be determined by direct weighing. The error is small, which can reliably guide the sand feeding and discharging operation of the thickener.

[0013] 2. Using a conical or spindle-shaped insert weight can overcome mud layer resistance, deeply monitor the internal mass concentration structure of the mud layer, and guide the operation of the thickener;

[0014] 3. The sampling weight adopts a side-feed method to avoid sucking up the bottom material and affecting the mass concentration detection;

[0015] 4. The installation of a drain pipe facilitates the drainage of slurry from the sampling and delivery pipes, making it convenient for the next sampling.

[0016] 5. The sampled material is tested before being discharged into the central tank of the thickener for further flocculation and sedimentation. The sampling process is hygienic and environmentally friendly, and does not interfere with the normal operation of the thickener.

[0017] 6. When taking multi-point sampling in the height direction of the mud layer inside the thickener, mathematical regression analysis can be used to predict and analyze the mass concentration distribution of the mud layer in the entire chamber, and accurately guide the operation of the thickener and the sand feeding and discharging operations. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the first positioning and extraction component used in the thickener weighing-type automatic mud layer thickness monitoring system described in this embodiment of the utility model.

[0019] Figure 2 yes Figure 1 An enlarged schematic diagram of point A in the middle.

[0020] Explanation of reference numerals in the attached figures:

[0021] 10. Monitoring unit; 11. Volumetric hopper; 12. Weighing hopper support; 13. Weighing sensor; 14. Industrial computer; 15. Discharge valve; 16. Signal transmission line; 20. Thickener; 31. Sampling tube; 32. Sample delivery tube; 33. Sampling pump; 34. Tube winding support; 35. Tube winding machine; 36. Sampling counterweight; 37. Sampling valve; 38. Drain pipe; 39. Drain valve. Detailed Implementation

[0022] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0023] like Figure 1-2 As shown, an automatic monitoring system for mud layer thickness by weighing in a thickener includes a monitoring unit 10, a sampling unit, and a thickener 20. The monitoring unit 10 includes a constant volume hopper 11, a weighing hopper support 12, a weighing sensor 13, and an industrial control computer 14. The weighing hopper support 12 is located on top of the thickener 20, and the constant volume hopper 11 is located on the weighing hopper support 12. The volume of the constant volume hopper 11 is determined according to the actual weighing error, ranging from 1 to 100L. A discharge valve 15 is provided at the bottom. The weighing sensor 13 is connected to the constant volume hopper 11 for weighing the constant volume hopper 11. A signal transmission line 16 is provided between the industrial control computer 14 and the weighing sensor 13. The sampling unit includes a sampling tube 31, a sample delivery tube 32, a sampling pump 33, and a positioning extraction assembly. The two ends of the sample delivery tube 32 are connected to the volume-fixing hopper 11 and the sampling tube 31, respectively. The end of the sample delivery tube 32 connected to the volume-fixing hopper 11 is equipped with a sampling valve 37. The positioning and extraction assembly includes a tube winding support 34, a tube winding machine 35, and a sampling weight 36. The tube winding support 34 is located on the top of the thickener 20, and the tube winding machine 35 is located on the tube winding support 34. The sampling tube 31 is a flexible tube that is wound around the tube winding machine 35. The sampling weight 36 is located at the end of the sampling tube 31. The sampling weight 36 has a conical structure and a sampling port connected to the sampling tube 31 is opened on the side. The sampling pump 33 is located in the middle of the sample delivery tube 32. The end of the sample delivery tube 32 near the volume-fixing hopper 11 is also equipped with an empty pipe 38, and an empty valve 39 is provided on the empty pipe 38.

[0024] The working principle of the above technical solution is as follows:

[0025] During measurement, the tube reel 35 is started, and the sampling tube 31 is lowered. The sampling tube 31 is vertically lowered into the thickener 20 along with the sampling weight 36. The sampling valve 37 is opened, and the sampling pump 33 is started. The sampling port of the sampling weight 36 draws in mud for sampling. The drawn-in mud enters the constant volume hopper 11 through the sampling tube 31 and the sample delivery tube 32 until the constant volume hopper 11 is full. An overflow pipe can be installed at the constant volume hopper 11 to overflow when the hopper is full, ensuring that it is full. After sampling is completed, the weight is transferred. Sensor 13 weighs the hopper 11 and the sampled slurry, and transmits the information to the industrial control computer 14 via signal transmission line 16. The industrial control computer 14 automatically calculates the bulk density of the sample in the hopper 11, calculates the slurry mass concentration by comparing the bulk density with the slurry mass concentration, and determines the mud layer interface position by comparing the mass concentration with the set mud layer interface position mass concentration or bulk density threshold. After measurement, the discharge valve 15 can be opened to discharge the slurry in the hopper 11 back to the thickener 20.

[0026] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A system for automatic monitoring of the thickness of a layer of sludge in a thickener by means of weighing, characterized in that The monitoring part includes a constant volume hopper, a hopper support, a weighing sensor and an industrial computer, the hopper support is arranged on the top of the thickener, the constant volume hopper is arranged on the hopper support, the bottom of the constant volume hopper is provided with a discharge valve, the weighing sensor is connected with the constant volume hopper and used for weighing the constant volume hopper, and a signal transmission line is arranged between the industrial computer and the weighing sensor; The sampling part includes a sampling pipe, a sample conveying pipe, a sampling pump and a positioning and extraction assembly, two ends of the sample conveying pipe are connected with the constant volume hopper and the sampling pipe respectively, one end of the sample conveying pipe connected with the constant volume hopper is provided with a sampling valve, the positioning and extraction assembly is connected with the sampling pipe and used for determining the sampling position, and the sampling pump is arranged in the middle of the sample conveying pipe.

2. The thickener weigh- on- type bed depth automatic monitoring system according to claim 1, characterized in that, The positioning and extraction assembly includes a pipe winding support, a pipe winding machine and a sampling weight, the pipe winding support is arranged on the top of the thickener, the pipe winding machine is arranged on the pipe winding support, the sampling pipe is a flexible hose and is wound on the pipe winding machine, and the sampling weight is arranged at the end of the sampling pipe.

3. The thickener weigh- on- cake thickness automatic monitoring system of claim 2, wherein, The sampling weight is a conical structure and is provided with a sampling port communicated with the sampling pipe on the side surface.

4. The thickener weigh- on- cake thickness automatic monitoring system of claim 1, wherein, The end of the sample conveying pipe close to the constant volume hopper is further provided with an emptying pipe, and the emptying pipe is provided with an emptying valve.

5. The thickener weigh- on- tock automatic monitoring system according to claim 1, characterized in that, The volume of the constant volume hopper is 1-100L.

Images