A deep sampling and analysis device and method for a large biological oxidation tank

Abstract

The present invention belongs to the technical field of large-scale tank body depth sampling and water quality analysis equipment, and specifically relates to a large-scale biological oxidation tank depth sampling and analysis device; the device comprises an oxidation tank operating platform, a depth sampling and analysis machine, and a biological oxidation tank; the oxidation tank operating platform and the bridge platform on the top of the biological oxidation tank body are kept at a horizontal height, and the depth sampling and analysis machine moves freely horizontally on the oxidation tank operating platform; the sampling and analysis machine comprises a multifunctional body, a negative pressure buffer tank, a negative pressure solid-liquid separation tank, a negative pressure analysis tank, a vacuum pump, a washing pump, a winch sampling device, an air compressor, and a continuous slurry analyzer; the present invention is conducive to the smooth and efficient development of the biological oxidation gold extraction process, and the depth sampling and analysis machine can also be applied to other slurry tank body sampling and online analysis, and has a positive and broad market impact.

Description

Technical Field

[0001] The invention belongs to the technical field of large-scale tank depth sampling and water quality analysis equipment, and particularly relates to a large-scale biological oxidation tank depth sampling and analysis device and method. Background Art

[0002] The bio-oxidation pretreatment gold extraction technology is to use microorganisms in nature to select sulfur-loving and iron-loving leaching strains. After adaptive cultivation and domestication, under a suitable environment, the direct metabolism of these microorganisms or the indirect metabolism of their metabolites are used to oxidize and decompose the sulfide ore matrix, destroying harmful components such as pyrite and arsenopyrite that wrap the gold, thereby fully exposing the gold. The core of the bio-oxidation pretreatment gold extraction technology is to cultivate and domesticate excellent leaching strains. Factors that affect their vitality and metabolic intensity include grinding fineness, pulp concentration, oxidation temperature, dissolved oxygen concentration, Fe 3+ Concentration, redox potential (Eh), culture medium, etc. Therefore, the gold mine bio-oxidation plant must conduct real-time monitoring and measurement of the above indicators to achieve the optimal oxidation activity of the leaching bacteria and improve the efficiency of gold extraction for bio-oxidation pretreatment. Since the dimensions of conventional bio-oxidation tanks are all over 10 meters, there is no mature technical method for continuous and frequent deep and accurate sampling of large tanks and rapid analysis of factors affecting the vitality and metabolic intensity of leaching bacteria. The current method is to check the oxidation effect of the bio-oxidation tank based on the mineral gold leaching effect. The sampling method is manual sampling with a sampling bottle. The sampling depth and sampling range are uncontrollable, and continuous large-scale sampling is not possible. After sampling, laboratory solid-liquid separation is required for water quality analysis, resulting in excessive workload and slow progress of work. Summary of the Invention

[0003] In order to overcome the above problems, the present invention provides a large-scale biological oxidation tank depth sampling and analysis device and method. It is a device for deep sampling and solid-liquid separation water quality detection in a large-scale biological oxidation tank in the microbial oxidation pretreatment gold extraction process. It can realize continuous and rapid sampling at any depth of the oxidation tank in the biological oxidation gold extraction process and complete water quality analysis in real time, and timely guide the adjustment of the biological oxidation tank process.

[0004] A large-scale biological oxidation tank depth sampling and analysis device, comprising an oxidation tank operating platform 1, a depth sampling and analysis machine 2, and a biological oxidation tank 3;

[0005] The deep sampling and analyzing machine 2 includes a multifunctional body 21, a negative pressure buffer tank 22, a negative pressure solid-liquid separation tank 23, a negative pressure analysis tank 24, a vacuum pump 25, a washing pump 26, a hoisting sampling device 27, an air compressor 28, and a continuous slurry analyzer 29; wherein the multifunctional body 21 is divided by a partition into an upper installation and maintenance area 211, a backwash water tank 214 located below and on the left side of the installation and maintenance area 211, and a functional area located on the right side of the backwash water tank 214; the negative pressure buffer tank 22, the negative pressure solid-liquid separation tank 23, and the negative pressure analysis tank 24 are fixed on the partition between the installation and maintenance area 211 and the functional area; the vacuum pump 25, the air compressor 28, and the washing pump 26 are arranged on the bottom plate of the functional area, and the liquid inlet of the washing pump 26 is connected to the backwash water tank 214;

[0006] The negative pressure buffer tank 22 is provided with a buffer tank liquid inlet 221, a buffer tank liquid outlet 222, a buffer tank liquid discharge port 223 and a first upper and lower limit switch liquid level gauge 224, wherein the buffer tank liquid inlet 221 and the buffer tank liquid discharge port 223 are both provided with valves;

[0007] The negative pressure solid-liquid separation tank 23 is provided with a separation tank liquid inlet 231, a separation tank liquid outlet 232, a separation tank discharge port 233 and a second upper and lower limit switch liquid level gauge 234, wherein the separation tank liquid inlet 231 and the separation tank discharge port 233 are both provided with valves, and the negative pressure solid-liquid separation tank 23 has a built-in solid-liquid separator 235, and the liquid outlet of the solid-liquid separator 235 is connected to the separation tank liquid outlet 232;

[0008] The negative pressure analysis tank 24 is provided with an analysis tank liquid inlet 241, an analysis tank liquid outlet 242, an analysis tank liquid discharge port 243, a third upper and lower limit switch liquid level gauge 244 and a multifunctional online analyzer 245, wherein the analysis tank liquid outlet 242 is connected to the air inlet of the vacuum pump 25, the air outlet of the air compressor 28 and the liquid outlet of the washing pump 26 through valves respectively, the buffer tank liquid outlet 222 and the separation tank liquid outlet 232 are connected to the analysis tank liquid inlet 241, and the analysis tank liquid discharge port 243 is provided with a valve;

[0009] The hoisting sampling device 27 includes a rotating hinge 271, a support arm 272, an electric hoist 273, a traction rope 274, a sampling hose 275 and a terminal gravity sampler 276, wherein the right end of the support arm 272 is connected to the left outer wall of the multifunctional body 21 through the rotating hinge 271, and the left end of the support arm 272 is connected to the electric hoist 273. One end of the sampling hose 275 is wound around the electric hoist 273, and the end of the sampling hose 275 is connected to one end of the pipeline 210. The continuous slurry analyzer 29 is provided on the pipeline 210. The other end of the pipeline 210 is connected to the buffer tank liquid inlet 221 and the separation tank liquid inlet 231 through the pipeline respectively. The terminal gravity sampler 276 is fixed to the bottom of the other end of the sampling hose 275, and is connected to the upper spherical liquid outlet 2762 of the terminal gravity sampler 276;

[0010] The biological oxidation tank 3 includes a tank body 31, a heat exchange turbulator 32, a sampling guide tube 33, a stirring system 34, and a bridge platform 35, wherein the bridge platform 35 is aligned with the oxidation tank operating platform 1 and installed on the tank body 31. The tank body 31 is provided with a stirring system 34. The heat exchange turbulator 32 is fixed between the tank body 31 and the bridge platform 35 through the sampling guide tube 33, and the top of the sampling guide tube 33 extends into the bridge platform 35. A plurality of guide holes 331 are evenly arranged on the wall of the sampling guide tube 33.

[0011] The hoisting sampling device 27 further includes a traction rope 274 , wherein the traction rope 274 is wound around the sampling hose 275 , and one end of the traction rope 274 is fixed to the end of the sampling hose 275 , and the bottom of the other end is fixed to the top of the terminal gravity sampler 276 .

[0012] The bottom of the sampling flow guide tube 33 is fixed to the bottom of the tank body 31 through a supporting plate 332 .

[0013] The bottom of the multifunctional body 21 is provided with moving wheels 215 .

[0014] The terminal gravity sampler 276 is a cylinder with spherical surfaces on both the top and bottom, and has a built-in through pipe. The top of the pipe is the upper spherical liquid outlet 2762, and the bottom of the pipe is the lower spherical liquid inlet 2761.

[0015] The electric winch 273 is provided with a traction rope retracting and releasing distance measuring device.

[0016] The multifunctional body 21 is further divided into a PLC control and power distribution area 213 on the right side by a vertical partition, and a human-computer interaction touch screen 212 is provided on the right side of the installation and maintenance area 211, wherein a PLC control system is provided in the PLC control and power distribution area 213, and the PLC control system is respectively connected to the vacuum pump 25, the air compressor 28, the washing pump 26, the continuous slurry analyzer 29, the first upper and lower limit switch level gauge 224, the second upper and lower limit switch level gauge 234, the third upper and lower limit switch level gauge 244, the multifunctional online analyzer 245, the electric winch 273, the motor of the stirring system 34, the human-computer interaction touch screen 212 and each valve control.

[0017] A method for online water quality analysis using the large-scale biological oxidation tank depth sampling and analysis device, including a common analysis mode and a continuous depth sampling slurry online analysis mode;

[0018] The general analysis mode includes the following:

[0019] Step 1: Determine the number of sampling points, the depth of each sampling point, the lifting speed of the electric winch 273, and the vacuum degree;

[0020] Step 2: Control the electric winch 273 to rotate, so that the end gravity sampler 276, driven by the traction rope 274 and the sampling hose 275, penetrates into the bridge platform 35, then extends into the sampling guide pipe 33, and sinks down along the sampling guide pipe 33 into the slurry in the tank body 31 of the biological oxidation tank 3;

[0021] Step 3: When the terminal gravity sampler 276 reaches the specified depth, the vacuum pump 25 is started and the valve on the analysis tank discharge port 242 and the valve on the buffer tank inlet 221 connected to the vacuum pump 25 are opened. At the same time, the biological oxidation tank 3 is in operation, that is, the stirring system 34 is turned on. Under the stirring of the stirring system 34, the slurry in the tank body 31 will flow into or out of the sampling guide tube 33 evenly through the guide hole 331, so that the slurry in the sampling guide tube 33 flows in and out in real time and has hierarchical representativeness.

[0022] Step 4: When the slurry in the sampling guide tube 33 reaches a certain position, the slurry enters the through-pipe in the terminal gravity sampler 276 through the lower spherical liquid inlet 2761 under the action of negative pressure drainage, and then continuously enters the sampling hose 275 through the upper spherical liquid outlet 2762, and then enters the negative pressure buffer tank 22 through the buffer tank liquid inlet 221 via the pipeline 210. When the slurry level in the negative pressure buffer tank 22 reaches the upper limit of the first upper and lower limit switch level gauge 224, the valve of the buffer tank liquid inlet 221 is closed to complete the removal of the interference sample;

[0023] Step 5: Open the valve of the separation tank liquid inlet 231, and the slurry in the sampling hose 275 enters the negative pressure solid-liquid separation tank 23. When the liquid level exceeds the upper limit of the second upper and lower limit switch liquid level gauge 234, the solid-liquid separator 235 begins to achieve solid-liquid separation. The water separated from the slurry enters the negative pressure analysis tank 24 through the separation tank liquid outlet 232 and the analysis tank liquid inlet 241. When the water level in the negative pressure analysis tank 24 reaches the upper limit of the third upper and lower limit switch liquid level gauge 244 and the liquid level height cannot enter the analysis tube liquid outlet 242, turn off the vacuum pump 25, close the valve of the analysis tank liquid outlet 242 connected to the vacuum pump 25, and close the valve of the separation tank liquid inlet 231;

[0024] Step 6: The multifunctional online analyzer 245 starts online monitoring and analysis of water quality indicators: slurry concentration, oxidation temperature, dissolved oxygen concentration, and redox potential;

[0025] Step seven: open the valves of the buffer tank drain port 223, the separation tank drain port 233, and the analysis tank drain port 243, and open the valve of the analysis tank outlet port 242 connected to the air compressor 28. The air compressor 28 is turned on to drain the materials in the negative pressure buffer tank 22, the negative pressure solid-liquid separation tank 23, and the negative pressure analysis tank 24. After the liquid level reaches the lower limit of each upper and lower limit switch level gauge, wait for confirmation of emptying, close the valves of the buffer tank drain port 223, the separation tank drain port 233, and the analysis tank drain port 243, close the valve of the analysis tank outlet port 242 connected to the air compressor 28, and turn off the air compressor 28.

[0026] In step eight, the electric winch 273 is turned on, driving the terminal gravity sampler 276 to move down in the sampling guide tube 33 to the next sampling point, and repeating steps three to seven to perform sampling and analysis at the next sampling point;

[0027] Step 9: After all sampling points have been sampled and analyzed, the washing pump 26 and the valve of the analysis tank drain port 242 connected thereto are opened. The backwash water in the backwash water tank 214 reaches the negative pressure buffer tank 22, the negative pressure solid-liquid separation tank 23, and the negative pressure analysis tank 24. When the backwash water reaches the upper limit of each upper and lower limit switch level gauge, the washing pump 26 and the corresponding valves are closed. Finally, the air compressor 28 is started again to drain the backwash water and complete the self-cleaning of the equipment.

[0028] The continuous depth sampling slurry online analysis mode includes the following contents:

[0029] The terminal gravity sampler 276 begins to enter the slurry surface of the biological oxidation tank 3 and descends to the bottom of the tank body 31 of the biological oxidation tank 3 at a certain speed. At the same time, the vacuum pump 25 is turned on, and the valves of the buffer tank liquid inlet 221, the separation tank liquid inlet 231, and the analysis tank discharge port 242 connected to the vacuum pump 25 are opened, so that the slurry in the biological oxidation tank 31 continuously flows through the sampling hose 275, and the continuous slurry analyzer 29 installed on the pipeline continuously analyzes the slurry in real time.

[0030] Beneficial effects of the present invention:

[0031] The present invention, in conjunction with the terminal gravity sampler and the sampling guide tube, eliminates the stirring interference of the stirring system of the biological oxidation tank, and can accurately and continuously obtain the slurry samples specified by the biological oxidation tank; at the same time, through the negative pressure pumping, drainage, and backwashing functions, on-site online slurry solid-liquid separation is achieved to prepare water samples for precise measurement and analysis; the PLC control system makes the sampling and analysis work fully automated, with high speed and good repeatability. The human-computer interactive touch screen data analysis software can achieve statistical guidance process optimization of the sampling and analysis data, which is conducive to the smooth and efficient development of the biological oxidation gold extraction process. The sampling and analysis machine is easy to maintain online, and a mobile sampling and analysis machine can realize the sampling and analysis of all tanks in industrial applications. The deep sampling and analysis machine can also be used for sampling and online analysis of other slurry tanks, which has a positive and broad market impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments of the present invention. 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 the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0033] Figure 1 、 Figure 2 、 Figure 3 A schematic structural diagram of the present invention

[0034] 1—Oxidation tank operating platform; 2—Deep sampling and analysis machine; 3—Biological oxidation tank;

[0035] 21 - Multifunctional machine body; 22 - Negative pressure buffer tank; 23 - Negative pressure solid-liquid separation tank; 24 - Negative pressure analysis tank; 25 - Vacuum pump; Washing pump; 27 - Hoist sampling device; 28 - Air compressor; 29 - Continuous slurry analyzer; 31 - Tank; 32 - Heat exchange turbulator; 33 - Sampling guide tube; 34 - Stirring system; 35 - Bridge platform;

[0036] 210—Pipeline; 211—Installation and maintenance area; 212—Human-machine interactive touch screen; 213—PLC control and power distribution area; 214—Backwash tank; 215—Moving wheel;

[0037] 221—buffer tank liquid inlet; 222—buffer tank liquid outlet; 223—buffer tank liquid discharge port; 224—first upper and lower limit switch liquid level gauge;

[0038] 231—Separation tank liquid inlet; 232—Separation tank liquid outlet; 233—Separation tank liquid discharge port; 234—Second upper and lower limit switch liquid level gauge; 235—Solid-liquid separator;

[0039] 241—Analysis tank liquid inlet; 242—Analysis tank liquid outlet; 243—Analysis tank liquid drain; 244—Third upper and lower limit switch liquid level gauge; 245—Multi-function online analyzer;

[0040] 271 - rotating hinge; 272 - support arm; 273 - electric winch; 274 - traction rope; 275 - sampling hose; 276 - terminal gravity sampler; 276 - 1 - lower spherical liquid inlet; 276 - 2 - upper spherical liquid outlet;

[0041] 331—diversion hole; 332—supporting vertical plate. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0043] Example 1

[0044] like Figure 1 and Figure 2 As shown, a large-scale biological oxidation tank depth sampling and analysis device includes an oxidation tank operating platform 1, a depth sampling and analysis machine 2, and a biological oxidation tank 3;

[0045] The deep sampling and analysis machine 2 includes a multifunctional body 21, a negative pressure buffer tank 22, a negative pressure solid-liquid separation tank 23, a negative pressure analysis tank 24, a vacuum pump 25, a washing pump 26, a hoisting sampling device 27, an air compressor 28, and a continuous slurry analyzer 29; wherein the multifunctional body 21 is divided by a partition into an upper installation and maintenance area 211, a backwash water tank 214 located below and on the left side of the installation and maintenance area 211, and a functional area located on the right side of the backwash water tank 214; the negative pressure buffer tank 22, the negative pressure solid-liquid separation tank 23, and the negative pressure analysis tank 24 are fixed on the partition between the installation and maintenance area 211 and the functional area; the vacuum pump 25, the air compressor 28, and the washing pump 26 are arranged on the bottom plate of the functional area, and the liquid inlet of the washing pump 26 is connected to the backwash water tank 214;

[0046] The negative pressure buffer tank 22 is provided with a buffer tank liquid inlet 221, a buffer tank liquid outlet 222, a buffer tank liquid discharge port 223 and a first upper and lower limit switch liquid level gauge 224, wherein the buffer tank liquid inlet 221 and the buffer tank liquid discharge port 223 are both provided with valves;

[0047] The negative pressure solid-liquid separation tank 23 is provided with a separation tank liquid inlet 231, a separation tank liquid outlet 232, a separation tank discharge port 233 and a second upper and lower limit switch liquid level gauge 234, wherein the separation tank liquid inlet 231 and the separation tank discharge port 233 are both provided with valves, and the negative pressure solid-liquid separation tank 23 has a built-in solid-liquid separator 235, and the liquid outlet of the solid-liquid separator 235 is connected to the separation tank liquid outlet 232;

[0048] The negative pressure analysis tank 24 is provided with an analysis tank liquid inlet 241, an analysis tank liquid outlet 242, an analysis tank liquid discharge port 243, a third upper and lower limit switch liquid level gauge 244 and a multifunctional online analyzer 245, wherein the analysis tank liquid outlet 242 is connected to the air inlet of the vacuum pump 25, the air outlet of the air compressor 28 and the liquid outlet of the washing pump 26 through valves respectively, the buffer tank liquid outlet 222 and the separation tank liquid outlet 232 are connected to the analysis tank liquid inlet 241, and the analysis tank liquid discharge port 243 is provided with a valve;

[0049] The hoisting sampling device 27 includes a rotating hinge 271, a support arm 272, an electric hoist 273, a traction rope 274, a sampling hose 275 and a terminal gravity sampler 276, wherein the right end of the support arm 272 is connected to the left outer wall of the multifunctional body 21 through the rotating hinge 271, and the left end of the support arm 272 is connected to the electric hoist 273. One end of the sampling hose 275 is wound around the electric hoist 273, and the end is connected to one end of the pipeline 210, and a continuous slurry analyzer 29 is provided on the pipeline 210. The other end of the pipeline 210 is respectively connected to the buffer tank liquid inlet 221 and the separation tank liquid inlet 231 through the pipeline. The terminal gravity sampler 276 is fixed to the bottom of the other end of the sampling hose 275, and is connected to the upper spherical liquid outlet 2762 of the terminal gravity sampler 276;

[0050] The biological oxidation tank 3 includes a tank body 31, a heat exchange turbulator 32, a sampling guide tube 33, a stirring system 34, and a bridge platform 35, wherein the bridge platform 35 is aligned with the oxidation tank operating platform 1 and is installed on the tank body 31. A stirring system 34 is provided in the tank body 31. The heat exchange turbulator 32 is fixed between the tank body 31 and the bridge platform 35 through the sampling guide tube 33, and the top of the sampling guide tube 33 extends into the bridge platform 35. A plurality of guide holes 331 are evenly arranged on the wall of the sampling guide tube 33.

[0051] The hoisting sampling device 27 further includes a traction rope 274, wherein the traction rope 274 is wound around the sampling hose 275, and one end of the traction rope 274 is fixed to the end of the sampling hose 275, and the bottom of the other end is fixed to the top of the terminal gravity sampler 276. The traction rope 274 prevents the sampling hose 275 from being broken by stress.

[0052] The bottom of the sampling flow guide tube 33 is fixed to the bottom of the tank body 31 through a supporting plate 332 .

[0053] The bottom of the multifunctional body 21 is provided with moving wheels 215 .

[0054] The terminal gravity sampler 276 is a cylinder with upper and lower spherical surfaces, and has a built-in through pipe. The top of the pipe is the upper spherical liquid outlet 2762, and the bottom of the pipe is the lower spherical liquid inlet 2761.

[0055] The stirring system 34 includes a motor, a connecting rod and a stirring impeller, wherein the motor is fixed on the bridge platform 35 through a bracket, and a connecting rod is connected to its transmission shaft. The connecting rod extends into the tank body 31, and a plurality of stirring impellers are fixed at the bottom thereof.

[0056] The electric winch 273 is provided with a traction rope retracting and releasing distance measuring device.

[0057] The multifunctional body 21 is further divided into a PLC control and power distribution area 213 on the right side by a vertical partition, and a human-computer interaction touch screen 212 is provided on the right side of the installation and maintenance area 211, wherein a PLC control system is provided in the PLC control and power distribution area 213, and the PLC control system is respectively connected to the air compressor 28, the continuous slurry analyzer 29, the first upper and lower limit switch level gauge 224, the second upper and lower limit switch level gauge 234, the third upper and lower limit switch level gauge 244, the multifunctional online analyzer 245, the electric winch 273, the motor of the stirring system 34, the human-computer interaction touch screen 212 and each valve control.

[0058] The working process of the present invention is as follows: First, when conventional precise multi-depth fixed-point sampling is performed for online analysis of water quality, it is necessary to manually record the number of sampling points, the depth of each sampling point, the lifting speed of the electric winch 273, and the vacuum degree. After the parameters are determined, the electric winch 273 is powered on and starts to rotate through the human-computer interaction touch screen 212 and the PLC control system, so that the terminal gravity sampler 276 is driven by the traction rope 274 and the sampling hose 275 to penetrate into the bridge platform 35, and then extend into the sampling guide tube 33, and sink down along the sampling guide tube 33 into the slurry in the tank body 31 of the biological oxidation tank 3. The diameter of the guide hole 331 of 3 is smaller than the outer diameter of the terminal gravity sampler 276, so that the terminal gravity sampler 276 can move up and down smoothly in the sampling guide tube 33. When the specified required depth is reached, the vacuum pump 25 is started, and the valve on the analysis tank discharge port 242 and the valve on the buffer tank inlet 221 connected to the vacuum pump 25 are opened. At the same time, the biological oxidation tank 3 is in working state. Under the stirring of the stirring system 34, the slurry in the tank body 31 will flow into or out of the sampling guide tube 33 evenly through the guide hole 331, so that the slurry in the sampling guide tube 33 flows in and out in real time with hierarchical representativeness. Therefore, after the sampling guide tube 33 reaches the designated position, the slurry enters the through pipe in the terminal gravity sampler 276 through the lower spherical liquid inlet 2761 under the action of negative pressure drainage, and then continuously enters the sampling hose 275 through the upper spherical liquid outlet 2762, and then enters the negative pressure buffer tank 22 through the buffer tank liquid inlet 221 through the pipeline 210. When the slurry level in the negative pressure buffer tank 22 reaches the upper limit of the first upper and lower limit switch level gauge 224, the buffer tank liquid inlet 221 valve is closed to complete the removal of the interference sample, and the separation tank liquid inlet 231 valve is opened. The slurry in the sampling hose 275 enters the negative pressure solid-liquid separation tank 23. When the liquid level exceeds the second upper limit switch level gauge 224, the slurry level in the negative pressure buffer tank 22 reaches the upper limit of the first upper and lower limit switch level gauge 224, the valve of the buffer tank liquid inlet 221 is closed to complete the removal of the interference sample, and the valve of the separation tank liquid inlet 231 is opened. The slurry in the sampling hose 275 enters the negative pressure solid-liquid separation tank 23. When the lower limit switch level gauge 234 reaches the upper limit, the solid-liquid separator 235 begins to achieve solid-liquid separation, and the water separated from the slurry enters the negative pressure analysis tank 24 through the separation tank outlet 232 and the analysis tank inlet 241. When the water level in the negative pressure analysis tank 24 reaches the upper limit of the third upper and lower limit switch level gauge 244 and cannot enter the analysis tube outlet 242, the vacuum pump 25 is turned off, the valve of the analysis tank outlet 242 connected to the vacuum pump 25 is closed, and the valve of the separation tank inlet 231 is closed; the multifunctional online analyzer 245 starts online monitoring and analysis of water quality indicators such as slurry concentration, oxidation temperature, dissolved oxygen concentration, and redox potential (Eh).At the same time, the electric winch 273 opens and moves down to the next sampling point, the valves of the buffer tank drain port 223, the separation tank drain port 233, and the analysis tank drain port 243 are opened, and the valve of the analysis tank outlet 242 connected to the air compressor 28 is opened. The air compressor 28 is turned on to empty the materials in the negative pressure buffer tank 22, the negative pressure solid-liquid separation tank 23, and the negative pressure analysis tank 24. After the liquid level reaches the lower limit of each upper and lower limit switch level gauge, it will be delayed for a period of time. After confirming that the liquid is empty, the valves of the buffer tank drain port 223, the separation tank drain port 233, and the analysis tank drain port 243 are closed, and the valves connected to the air compressor are closed. 28 connected to the analysis tank outlet 242 valve, the air compressor 28 is closed; the vacuum pump 25 is started and the above operation is repeated to start the sampling and analysis work of the next sampling point. After the sampling and analysis of all sampling points are completed, the washing pump 26 is turned on and the valve of the analysis tank discharge port 242 connected thereto is opened. The backwash water in the backwash water tank 214 reaches the negative pressure buffer tank 22, the negative pressure solid-liquid separation tank 23, and the negative pressure analysis tank 24. When the backwash water reaches the upper limit of each upper and lower limit switch level gauge, the washing pump 26 and the corresponding valve are turned off. Finally, the air compressor 28 is started again to discharge the liquid to remove the backwash water and complete the self-cleaning of the equipment.

[0059] During the continuous depth sampling and online analysis of the slurry, the terminal gravity sampler 276 begins to enter the biological oxidation tank 3 and the slurry level drops to the bottom of the tank body 31 of the biological oxidation tank 3 at a certain speed. At the same time, the vacuum pump 25 is turned on, and the valves of the buffer tank inlet 221, the separation tank inlet 231, and the analysis tank discharge port 242 connected to the vacuum pump 25 are opened, so that the slurry in the biological oxidation tank 31 continuously flows through the sampling hose 275, and the continuous slurry analyzer 29 installed on the pipeline continuously analyzes the slurry in real time.

[0060] Example 2

[0061] See also Figure 1 As shown, a large-scale biological oxidation tank depth sampling and analysis machine consists of an oxidation tank operating platform 1, a depth sampling and analysis machine 2, and a biological oxidation tank 3. The oxidation tank operating platform 1 is at the same height as the bridge platform 35 on the top of the tank body 31 of the biological oxidation tank 3 to maintain the operating height. The two platforms are connected together to form a whole. The sampling and analysis machine 2 can move on the large platform formed by the oxidation tank operating platform 1 and the bridge platform 35.

[0062] The core equipment - the deep sampling and analysis machine 2 includes a multifunctional body 21, a negative pressure buffer tank 22, a negative pressure solid-liquid separation tank 23, a negative pressure analysis tank 24, a vacuum pump 25, a washing pump 26, a winch sampling device 27, an air compressor 28, and a continuous slurry analyzer 29; the upper part of the multifunctional body 21 is an installation and maintenance area 211, a human-computer interaction touch screen 212, the right side is a PLC control and power distribution area 213, the left side is a backwash water tank 214, and the bottom is a moving wheel 215; the negative pressure buffer tank 22, the negative pressure solid-liquid separation tank 23, and the negative pressure analysis tank 24 are installed in the middle of the top of the multifunctional body 21 through the installation and maintenance area 211; the vacuum pump 25, the air compressor 28, and the washing pump 26 are arranged in the middle position of the lower part of the multifunctional body 21, and the liquid inlet of the washing pump 26 is connected to the backwash water tank 214; the hoisting sampling device 27 is arranged on the left side of the multifunctional body 21 and is connected to the rotating hinge 271; the continuous slurry analyzer 29 is placed on the slurry main line entering the negative pressure buffer tank 22 and the negative pressure solid-liquid separation tank 23.

[0063] The negative pressure buffer tank 22 is provided with a buffer tank liquid inlet 221, a buffer tank liquid outlet 222, a buffer tank liquid discharge port 223, a first upper and lower limit switch level gauge 224 is installed on the top, and automatic valves are provided on the buffer tank liquid inlet 221 and the buffer tank liquid discharge port 223.

[0064] The negative pressure solid-liquid separation tank 23 is provided with a separation tank liquid inlet 231, a separation tank liquid outlet 232, and a separation tank discharge port 233. A second upper and lower limit switch liquid level gauge 234 is installed on the top. Automatic valves are provided on the separation tank liquid inlet 231 and the separation tank discharge port 233. The negative pressure solid-liquid separation tank 23 has a built-in solid-liquid separator 235 connected to the separation tank liquid outlet (232).

[0065] The negative pressure analysis tank 24 is provided with an analysis tank liquid inlet 241, an analysis tank liquid outlet 242, an analysis tank discharge port 243, a top-mounted third upper and lower limit switch liquid level gauge 244 and a multi-functional online analyzer 245, the analysis tank liquid outlet 242 is respectively connected to the air inlet of the vacuum pump 25, the air outlet of the air compressor 28 and the liquid outlet of the washing pump 26 through automatic valves, and the analysis tank discharge port 243 is provided with an automatic valve; the analysis tank liquid inlet 241 is respectively connected to the buffer tank liquid outlet 222 and the separation tank liquid outlet 232.

[0066] The hoisting sampling device 27 includes a rotating hinge 271, a support arm 272, an electric hoist 273, a traction rope 274, a sampling hose 275 and a terminal gravity sampler 276, wherein the electric hoist 273 is installed at one end of the support arm 272, and the other end of the support arm 272 is movably installed on the multifunctional body 21 of the depth sampling analyzer 2 through the rotating hinge 271. One end of the traction rope 274 is connected to the terminal gravity sampler 276, and the other end of the main body is wound on the electric hoist 273; one end of the sampling hose 275 is connected to the main slurry pipe entering the negative pressure buffer tank 22 and the negative pressure solid-liquid separation tank 23, and automatic valves are provided in front of the buffer tank liquid inlet 221 and the separation tank liquid inlet (231) communicated with the sampling hose 275. The main body of the sampling hose 275 is wound on the electric hoist 273, and the other end is connected to the spherical liquid outlet 2762 on the terminal gravity sampler 276. The end gravity sampler 276 is a cylindrical body with upper and lower spherical surfaces, and has built-in through pipes for the upper spherical liquid outlet 2762 and the lower spherical liquid inlet 2761. The electric winch 273 is equipped with a traction rope retracting and discharging device, which can automatically control and calculate how many turns it takes to make the sampling hose 275 descend by how many meters.

[0067] The biological oxidation tank 3 includes a tank body 31, a heat exchange turbulator 32, a sampling guide tube 33, a stirring system 34, and a bridge platform 35, wherein the stirring system 34 is fixed on the bridge platform 35, the bridge platform 35 is installed on the tank body 31, and the heat exchange turbulator 32 is fixed to the bottom of the tank body 31 and the bridge platform 35 through the sampling guide tube 33, that is, each biological oxidation tank selects a group of fixed columns of the heat exchange turbulator 32 as the sampling guide tube 33.

[0068] The bottom of the sampling guide tube 33 is kept at a certain distance from the trough body 31 and is fixed to the trough body 31 by a supporting vertical plate 332. The entire tube wall of the sampling guide tube 33 is evenly provided with guide holes 331, so that the slurry at any height of the oxidation tank can enter the sampling guide tube 33 and be discharged in time without blocking the sampling guide tube. The size of the guide hole 331 should not affect the up and down movement of the terminal gravity sampler 276. When the terminal gravity sampler 276 is working, it is placed in the sampling guide tube 33 and moves up and down with the traction rope 274.

[0069] The human-computer interaction touch screen 212 realizes human-computer interaction input of sampling depth and sampling speed parameters, records and stores water quality analysis results, and the PLC controls the electric winch 273, automatic valve, vacuum pump 25, air compressor 28, and cleaning pump 26 according to the instructions and the signals of the upper and lower limit switch level gauges to complete the sampling and analysis work.

[0070] The present invention operates as follows: First, the control system of the deep sampling and analysis machine 2 is activated through the PLC control and power supply from the power distribution area 213. Then, the operating mode is manually selected on the human-machine interactive touch screen 212, including conventional precision multi-depth fixed-point sampling water quality online analysis mode and continuous depth sampling slurry online analysis mode. Conventional precision multi-depth fixed-point sampling water quality online analysis mode requires manual input of the number of sampling points, the depth of each sampling point, the speed of the electric winch 273, and the vacuum level. Once the parameters are set, click Start Sampling. The electric winch 273 starts to rotate, and under the action of gravity of the terminal gravity sampler 276, the traction rope 274 and the sampling hose 275 are driven to sink along the sampling guide tube 33 into the slurry in the tank body 31 of the biological oxidation tank 3. Since the guide hole 331 of the sampling guide tube 33 is smaller than the terminal gravity sampler 276, the terminal gravity sampler 276 can move up and down smoothly in the sampling guide tube 33. When the specified depth is reached, the vacuum pump 25 is started, and the automatic valve of the analysis tank discharge port 242 and the automatic valve of the buffer tank inlet 221 connected to the vacuum pump are opened. At the same time, when the biological oxidation tank 3 is in working state, the slurry in the tank body 31 will flow into or out of the sampling guide tube 33 of the fixed heat exchange turbulator 32 evenly through the guide hole 331 under the stirring of the stirring system 34, so that the slurry in the sampling guide tube 33 flows in and out in real time with hierarchical representativeness. Therefore, when the terminal gravity sampler 276 reaches the designated position, it enters the terminal gravity sampler 276 through the lower spherical liquid inlet 2761 under the action of negative pressure drainage, and then continuously enters the sampling hose 275 through the upper spherical liquid outlet 2762, and enters the negative pressure buffer tank 22 through the buffer tank inlet 221. When the slurry level in the negative pressure buffer tank 22 reaches the upper limit of the first upper and lower limit switch level gauge 224, the buffer tank inlet 221 automatically closes the valve to complete the removal of the interference sample, and the separation tank inlet 231 automatically opens the valve to let the slurry in the sampling hose 275 enter the negative pressure solid-liquid separation tank 23. When the liquid level exceeds the solid-liquid separator 235, solid-liquid separation begins, and the slurry is separated. The separated water enters the negative pressure analysis tank 24 through the separation tank outlet 232 and the analysis tank inlet 241. When the water level in the negative pressure analysis tank 24 reaches the upper limit of the third upper and lower limit switch level gauge 244 and cannot enter the analysis tube outlet 242, the vacuum pump 25 is turned off, the automatic valve of the analysis tank outlet 242 connected to the vacuum pump 25 is closed, and the automatic valve of the separation tank inlet 231 is closed; the multifunctional online analyzer 245 starts online monitoring and analysis of water quality indicators such as slurry concentration, oxidation temperature, dissolved oxygen concentration, redox potential (Eh), etc., and reads the data through PLC213 and transmits it to the human-computer interaction touch screen 212 for display and access analysis.At the same time, the electric winch 273 opens and moves down to the next sampling point, the automatic valves of the buffer tank drain port 223, the separation tank drain port 233, and the analysis tank drain port 243 are opened, and the automatic valve of the analysis tank outlet 242 connected to the air compressor 28 is opened, and the air compressor 28 is turned on to empty the materials in the negative pressure buffer tank 22, the negative pressure solid-liquid separation tank 23, and the negative pressure analysis tank 24. After the liquid level reaches the lower limit of each upper and lower limit switch level gauge, it will be delayed for a period of time to confirm that it is empty. The automatic valves of the buffer tank drain port 223, the separation tank drain port 233, and the analysis tank drain port 243 are closed, and the air compressor 28 is turned on to empty the materials in the negative pressure buffer tank 22, the negative pressure solid-liquid separation tank 23, and the negative pressure analysis tank 24. 8, the automatic valve of the analysis tank outlet 242 connected to it is closed, and the air compressor 28 is turned off; the vacuum pump 25 is started and the above operation is repeated to start the sampling and analysis work of the next sampling point. After the sampling and analysis of all sampling points are completed, the washing pump 26 is turned on and the automatic valve of the analysis tank discharge port 242 connected to it is opened. When the backwash water in the backwash water tank 214 reaches the upper and lower limit switch level gauges of the negative pressure buffer tank 22, the negative pressure solid-liquid separation tank 23, and the negative pressure analysis tank 24, the washing pump 26 and the corresponding valves are turned off, and finally the air compressor 28 is started again to discharge the liquid to remove the backwash water and complete the self-cleaning of the equipment.

[0071] The working mode of the continuous depth sampling slurry online analysis mode is that the terminal gravity sampler 276 starts to enter the biological oxidation tank 3 and the slurry level drops to the bottom of the biological oxidation tank 3 body 31 at a certain speed. At the same time, the vacuum pump 25 is turned on, and the buffer tank inlet 221, the separation tank inlet 231, and the analysis tank discharge port 242 connected to the vacuum pump 25 are automatically opened. The slurry in the biological oxidation tank 31 continuously flows through the sampling hose 275, and the continuous slurry analyzer 29 installed on the pipeline continuously analyzes the slurry in real time. The analysis results are read by the PLC and transmitted to the human-computer interaction touch screen 212 for display and access analysis.

[0072] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the scope of protection of the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, any technician familiar with the technical field can make equivalent replacements or changes based on the technical solution and inventive concept of the present invention within the technical scope disclosed by the present invention. These simple variations all fall within the scope of protection of the present invention.

[0073] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0074] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A large-scale biological oxidation tank depth sampling and analysis device, characterized in that It includes an oxidation tank operating platform (1), a depth sampling and analysis machine (2), and a biological oxidation tank (3); The depth sampling analyzer (2) comprises a multifunctional body (21), a negative pressure buffer tank (22), a negative pressure solid-liquid separation tank (23), a negative pressure analysis tank (24), a vacuum pump (25), a washing pump (26), a hoisting sampling device (27), an air compressor (28), and a continuous slurry analyzer (29); wherein the multifunctional body (21) is divided into an upper installation and maintenance area (211), a backwash water tank (214) located on the left side below the installation and maintenance area (211), and a functional area located on the right side of the backwash water tank (214) by a partition; the negative pressure buffer tank (22), the negative pressure solid-liquid separation tank (23), and the negative pressure analysis tank (24) are fixed on the partition between the installation and maintenance area (211) and the functional area; the vacuum pump (25), the air compressor (28), and the washing pump (26) are arranged on the bottom plate of the functional area, and the liquid inlet of the washing pump (26) is connected to the backwash water tank (214); The negative pressure buffer tank (22) is provided with a buffer tank liquid inlet (221), a buffer tank liquid outlet (222), a buffer tank liquid discharge port (223), and a first upper and lower limit switch liquid level gauge (224), wherein valves are provided on the buffer tank liquid inlet (221) and the buffer tank liquid discharge port (223); The negative pressure solid-liquid separation tank (23) is provided with a separation tank liquid inlet (231), a separation tank liquid outlet (232), a separation tank liquid discharge port (233) and a second upper and lower limit switch liquid level gauge (234), wherein valves are provided on the separation tank liquid inlet (231) and the separation tank liquid discharge port (233), and the negative pressure solid-liquid separation tank (23) is internally provided with a solid-liquid separator (235), the inlet of the solid-liquid separator (235) is communicated with the separation tank liquid outlet (232), and the outlet of the solid-liquid separator (235) is communicated with the separation tank liquid discharge port (233); The negative pressure analysis tank (24) is provided with an analysis tank liquid inlet (241), an analysis tank liquid outlet (242), an analysis tank liquid discharge port (243), a third upper and lower limit switch liquid level gauge (244) and a multifunctional online analyzer (245), wherein the analysis tank liquid outlet (242) is connected to the air inlet of the vacuum pump (25), the air outlet of the air compressor (28) and the liquid outlet of the washing pump (26) through valves, respectively, the buffer tank liquid outlet (222) and the separation tank liquid outlet (232) are connected to the analysis tank liquid inlet (241) in common, and the analysis tank liquid discharge port (243) is provided with a valve; The hoisting sampling device (27) includes a rotating hinge (271), a support arm (272), an electric hoist (273), a traction rope (274), a sampling hose (275) and a terminal gravity sampler (276), wherein the right end of the support arm (272) is connected to the left outer wall of the multifunctional body (21) through the rotating hinge (271), the left end of the support arm (272) is connected to the electric hoist (273), one end of the sampling hose (275) is wound around the electric hoist (273), and the sampling hose (275) is connected to the electric hoist (273). The end of the sampling hose (275) wound on the electric winch (273) is connected to one end of the pipeline (210). The pipeline (210) is provided with a continuous slurry analyzer (29). The other end of the pipeline (210) is connected to the buffer tank liquid inlet (221) and the separation tank liquid inlet (231) through pipelines. The bottom of the other end of the sampling hose (275) is fixed with a terminal gravity sampler (276), which is connected to the upper spherical liquid outlet (2762) of the terminal gravity sampler (276). The biological oxidation tank (3) includes a tank body (31), a heat exchange turbulator (32), a sampling guide tube (33), a stirring system (34), and a bridge platform (35), wherein the bridge platform (35) is aligned with the oxidation tank operating platform (1) and is installed on the tank body (31), the tank body (31) is provided with a stirring system (34), the heat exchange turbulator (32) is fixed between the tank body (31) and the bridge platform (35) through the sampling guide tube (33), and the top of the sampling guide tube (33) extends into the bridge platform (35), and a plurality of guide holes (331) are evenly opened on the wall of the sampling guide tube (33).

2. A large-scale biological oxidation tank depth sampling and analysis device according to claim 1, characterized in that The hoisting sampling device (27) further includes a traction rope (274), wherein the traction rope (274) is wound around the sampling hose (275), and one end of the traction rope is fixed to the end of the sampling hose (275), and the bottom of the other end is fixed to the top of the terminal gravity sampler (276).

3. A large-scale biological oxidation tank depth sampling and analysis device according to claim 1, characterized in that The bottom of the sampling flow guide tube (33) is fixed to the bottom of the tank body (31) via a supporting vertical plate (332).

4. A large-scale biological oxidation tank depth sampling and analysis device according to claim 1, characterized in that The bottom of the multifunctional body (21) is provided with moving wheels (215).

5. A large-scale biological oxidation tank depth sampling and analysis device according to claim 1, characterized in that The terminal gravity sampler (276) is a cylinder with spherical surfaces at the top and bottom, and has a built-in through pipe. The top of the pipe is an upper spherical liquid outlet (2762), and the bottom of the pipe is a lower spherical liquid inlet (2761).

6. A large-scale biological oxidation tank depth sampling and analysis device according to claim 1, characterized in that The electric winch (273) is provided with a traction rope retracting and releasing distance measuring device.

7. A large-scale biological oxidation tank depth sampling and analysis device according to claim 1, characterized in that The multifunctional body (21) is further divided into a PLC control and power distribution area (213) on the right side by a vertical partition, and a human-machine interactive touch screen (212) is provided on the right side of the installation and maintenance area (211), wherein a PLC control system is provided in the PLC control and power distribution area (213), and the PLC control system is respectively connected to the vacuum pump (25), the air compressor (28), the washing pump (26), the continuous slurry analyzer (29), the first upper and lower limit switch level gauge (224), the second upper and lower limit switch level gauge (234), the third upper and lower limit switch level gauge (244), the multifunctional online analyzer (245), the electric winch (273), the motor of the stirring system (34), the human-machine interactive touch screen (212), and each valve control.

8. A method for online water quality analysis using the large-scale biological oxidation tank depth sampling and analysis device according to any one of claims 1 to 7, characterized in that Includes normal analysis mode and continuous depth sampling slurry online analysis mode; The general analysis mode includes the following: Step 1, determining the number of sampling points, the depth of each sampling point, the lifting speed of the electric winch (273), and the vacuum degree; Step 2: Control the electric winch (273) to rotate, so that the end gravity sampler (276) is driven by the traction rope (274) and the sampling hose (275) to penetrate into the bridge platform (35), and then extend into the sampling guide pipe (33), and sink down along the sampling guide pipe (33) into the slurry in the tank body (31) of the biological oxidation tank (3); Step 3: When the terminal gravity sampler (276) reaches the specified required depth position, the vacuum pump (25) is controlled to start, and the valve on the analysis tank discharge port (242) and the valve on the buffer tank inlet (221) connected to the vacuum pump (25) are opened. At the same time, the biological oxidation tank (3) is in a working state, that is, the stirring system (34) is turned on. Under the stirring of the stirring system (34), the slurry in the tank body (31) will flow into or out of the sampling guide pipe (33) evenly through the guide hole (331), so that the slurry in the sampling guide pipe (33) flows in and out in real time and has hierarchical representativeness; Step 4: When the slurry in the sampling guide tube (33) reaches a certain position, the slurry enters the through-pipe in the terminal gravity sampler (276) through the lower spherical liquid inlet (2761) under the action of negative pressure drainage, and then continuously enters the sampling hose (275) through the upper spherical liquid outlet (2762), and then enters the negative pressure buffer tank (22) through the buffer tank liquid inlet (221) via the pipeline (210). When the slurry level in the negative pressure buffer tank (22) reaches the upper limit of the first upper and lower limit switch level gauge (224), the buffer tank liquid inlet (221) valve is closed to complete the removal of the interference sample; Step 5: Open the valve of the separation tank liquid inlet (231), and the slurry in the sampling hose (275) enters the negative pressure solid-liquid separation tank (23). When the liquid level exceeds the upper limit of the second upper and lower limit switch level gauge (234), the solid-liquid separator (235) starts to realize solid-liquid separation, and the water separated from the slurry enters the negative pressure analysis tank (24) through the separation tank liquid outlet (232) and the analysis tank liquid inlet (241). When the water level in the negative pressure analysis tank (24) reaches the upper limit of the third upper and lower limit switch level gauge (244) and the liquid level height cannot enter the analysis tank liquid outlet (242), turn off the vacuum pump (25), close the valve of the analysis tank liquid outlet (242) connected to the vacuum pump (25), and close the valve of the separation tank liquid inlet (231); Step 6: The multifunctional online analyzer (245) starts online monitoring and analysis of water quality indicators: slurry concentration, oxidation temperature, dissolved oxygen concentration, and redox potential; Step seven, the valves of the buffer tank drain port (223), the separation tank drain port (233), and the analysis tank drain port (243) are opened, and the valve of the analysis tank outlet port (242) connected to the air compressor (28) is opened. The air compressor (28) is turned on to empty the materials in the negative pressure buffer tank (22), the negative pressure solid-liquid separation tank (23), and the negative pressure analysis tank (24). After the liquid level reaches the lower limit of each upper and lower limit switch level gauge, the valves of the buffer tank drain port (223), the separation tank drain port (233), and the analysis tank drain port (243) are closed, and the valve of the analysis tank outlet port (242) connected to the air compressor (28) is closed, and the air compressor (28) is turned off; Step eight, the electric winch (273) is turned on, driving the terminal gravity sampler (276) to move down in the sampling guide tube (33) to the next sampling point, and repeating steps three to seven to perform sampling and analysis work at the next sampling point; Step nine, after all sampling points have been sampled and analyzed, the washing pump (26) and the valve of the analysis tank drain port (242) connected thereto are opened, and the backwash water in the backwash water tank (214) reaches the negative pressure buffer tank (22), the negative pressure solid-liquid separation tank (23), and the negative pressure analysis tank (24), until the upper and lower limit switch level gauges reach the upper limit, the washing pump (26) and the corresponding valves are closed, and finally the air compressor (28) is started again to discharge the liquid, and the backwash water is removed to complete the self-cleaning of the equipment; The continuous depth sampling slurry online analysis mode includes the following contents: The terminal gravity sampler (276) begins to enter the slurry surface of the biological oxidation tank (3) and descends to the bottom of the tank body (31) of the biological oxidation tank (3) at a certain speed. At the same time, the vacuum pump (25) is turned on, and the valves of the buffer tank liquid inlet (221), the separation tank liquid inlet (231), and the analysis tank discharge port (242) connected to the vacuum pump (25) are opened, so that the slurry in the biological oxidation tank (3) continuously flows through the sampling hose (275), and the continuous slurry analyzer (29) installed on the pipeline continuously analyzes the slurry in real time.

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