An online detection device and analysis method for slurry viscosity and solid content comprehensive characteristics

Abstract

The present invention discloses an online detection device and analysis method for slurry viscosity and solid content comprehensive characteristics. Addressing the low accuracy and high failure rate of commercially available online detection instruments for detecting organic waste slurries, the present invention provides the following technical solution: a slurry tank having an air inlet, an exhaust port, and a high-liquid-level trigger switch at the top, and a discharge port, a feed port, and a low-liquid-level trigger switch at the bottom. The air inlet is connected to an air compressor, and both the discharge port and the feed port are connected to pipelines of an organic waste pretreatment device. The exhaust port is equipped with an exhaust valve, the discharge port is equipped with a discharge valve, and the feed port is equipped with a feed valve. A float floats on the slurry liquid level within the slurry tank. A timer starts timing when the float leaves the high-liquid-level trigger switch and stops timing when the float reaches the low-liquid-level trigger switch, and displays the timed elapsed time. This device can accurately detect the viscosity and solid content comprehensive characteristics of organic waste slurry and has a long service life.

Description

Technical Field

[0001] The present invention relates to the technical field of organic waste treatment, and more particularly to an online detection device and analysis method for slurry viscosity and solid content comprehensive characteristics. Background Art

[0002] In the organic waste pretreatment process, the slurry viscosity and comprehensive solid content characteristics of each process section need to be frequently and regularly tested to facilitate the operation control of each link process. For example, the test results of the solid content and slurry viscosity after slurry oil removal are fed back to the deoiling centrifuge, so that the deoiling centrifuge can make corresponding adjustments based on the test results. The test results of the slurry after the oil removal process are fed back to the anaerobic link at the back end, so that the anaerobic link can make corresponding adjustments based on the test results to promote stable production and better output effects.

[0003] At present, the online detection instruments on the market are not suitable for organic waste slurry, because the components of organic waste slurry include granular scum, oil, fibrous floating matter, etc., which affect the detection accuracy of the online detection instruments, and the failure rate is high. The detection instruments are very expensive. Therefore, an online detection device suitable for organic waste is needed. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the first purpose of the present invention is to provide an online detection device for slurry viscosity and solid content comprehensive characteristics, which has the advantage of accurately detecting slurry viscosity and solid content comprehensive characteristics of organic waste.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An online detection device for slurry viscosity and solid content comprehensive characteristics, comprising

[0007] The slurry tank is provided with an air inlet, an exhaust port and a high liquid level touch switch on the top, and a discharge port, a feed port and a low liquid level touch switch on the bottom. The air inlet is connected to an air compressor, and the discharge port and feed port are both connected to the pipeline of the organic waste pretreatment equipment. The exhaust port is provided with an exhaust valve, the discharge port is provided with a discharge valve, and the feed port is provided with a feed valve;

[0008] a float, floating on the liquid surface of the slurry inside the slurry tank;

[0009] The timer starts timing when the float leaves the high liquid level trigger switch and stops timing when the float reaches the low liquid level trigger switch, and displays the timing time.

[0010] Using the above technical solution, with all other valves closed, open the feed valve and the exhaust valve to allow the slurry to flow smoothly into the bottom feed port of the slurry tank. The slurry pushes the float upward until it triggers the high-level trigger. The feed valve and exhaust valve are then closed, stopping the feed. The discharge valve and the air compressor are then opened. The air compressor presses air into the slurry tank from the air inlet, pushing the slurry downward and causing the float to clear the high-level trigger. A timer begins counting until the float triggers the low-level trigger. The discharge valve and air compressor are then closed, and the exhaust valve is opened to release any remaining compressed air. The time recorded by the timer represents the discharge time. According to fluid lubrication theory, viscosity is the internal friction between liquids, which affects the relative velocity of the various layers of the flowing liquid. This means that for the same volume of slurry, different viscosities and solids contents will result in different discharge times. Therefore, the discharge time recorded by the timer can be used to determine the combined viscosity and solids content of the slurry. The float design reduces the possibility of air penetrating the slurry, thereby improving the accuracy of testing the slurry's viscosity and overall solids content. Compared to extracting slurry from the organic waste pretreatment process pipeline and then sending it to the laboratory for testing, this device offers greater timeliness and feasibility. The air compressor provides stable power for the slurry's downward movement, ensuring a uniform descent speed.

[0011] Furthermore, a safety valve is provided on the top of the slurry tank.

[0012] With the above technical solution, the safety valve is normally in a closed state. When the pressure in the slurry tank is greater than the specified value of the safety valve, the safety valve opens and the gas in the slurry tank is discharged, preventing explosion accidents caused by excessive pressure in the slurry tank and ensuring the safety of the device.

[0013] Furthermore, the slurry tank is provided with a thermometer.

[0014] By adopting the above technical solution, the thermometer measures the temperature of the slurry tank, which is convenient for real-time monitoring of the temperature of the slurry tank. When the temperature of the slurry tank exceeds the set range, corresponding measures are taken to avoid safety accidents and improve the safety of the device.

[0015] Furthermore, the top and bottom of the slurry tank are both hemispherical.

[0016] The above technical solution increases the contact area between the top and bottom of the tank and the gas or liquid, enhancing the rigidity of the tank. Rigidity is the ability of an object to resist deformation; the greater the rigidity, the less deformation it will experience under load. If the top and bottom of the tank were flat, thin plates, the contact area would be smaller and the pressure higher under the same pressure. This would cause the tank to collapse under the pressure of the gas or water, causing it to bulge outward and become unsightly. Therefore, the hemispherical top and bottom of the tank enhance its rigidity and prevent deformation.

[0017] Furthermore, the middle portion of the float is a hollow structure.

[0018] By adopting the above technical solution, the hollow structure of the float ball ensures that the float ball floats in the slurry, so that the float ball can touch the high and low liquid level touch switch in time.

[0019] Furthermore, the ratio of the diameter of the float ball to the diameter of the slurry tank is 0.7-0.9.

[0020] This technical solution ensures a gap between the float and the inner wall of the slurry tank, and ensures that the float covers most of the slurry surface. If the gap between the float and the inner wall is too small, friction between the float and the tank will wear the float, preventing it from accurately representing the slurry level and causing inaccurate timing. If the gap between the float and the inner wall is too large, the float cannot effectively prevent compressed air from penetrating the liquid surface, causing air to be mixed into the slurry. Therefore, the ratio of the float diameter to the slurry tank diameter is 0.7-0.9, which ensures that the float accurately contacts the high and low liquid level contact switch while also preventing compressed air from penetrating the slurry surface.

[0021] Furthermore, the material of the float is a wear-resistant lightweight material.

[0022] By adopting the above technical solution, during the process of the slurry rising or falling, there is a certain degree of contact and friction between the float and the inner wall of the slurry tank. The float made of wear-resistant material ensures that the wear rate of the float is low, thereby extending the service life of the float. The float made of lightweight material ensures that the float effectively represents the liquid level of the slurry and accurately touches the high and low liquid level contact switches.

[0023] Furthermore, the air inlet is provided with an air inlet solenoid valve, and the discharge valve, feed valve, exhaust valve, high liquid level touch switch, low liquid level touch switch and air inlet solenoid valve are all automatic control valves and are electrically connected to the controller.

[0024] Using this technical solution, the air inlet solenoid valve ensures that polluted gases in the slurry tank are isolated from the air compressor, preventing atmospheric pollution. The controller's control program automatically controls the discharge valve, feed valve, exhaust valve, and air inlet solenoid valve, achieving interconnected control and ensuring timely switching of each valve, thus achieving automated control of the device.

[0025] In view of the shortcomings of the existing technology, the second purpose of the present invention is to provide a method for analyzing slurry viscosity and comprehensive solid content characteristics, which has the advantage of accurately detecting slurry viscosity and comprehensive solid content characteristics of organic waste.

[0026] To achieve the above object, the present invention provides the following technical solutions:

[0027] A method for analyzing slurry viscosity and comprehensive solid content characteristics: a sampling port is provided at both the feed port and the discharge port; when the feed valve and the exhaust valve are both opened and the feed port begins to feed, a slurry sample is collected from the sampling port of the feed port and immediately sent to a laboratory for viscosity and comprehensive solid content characteristics analysis; when the float touches a high liquid level touch switch, the feed valve and the exhaust valve are both closed, the discharge valve and the air inlet solenoid valve are opened, the air compressor starts to supply compressed air to the slurry tank, the float leaves the high liquid level touch switch, a timer starts timing, a slurry sample is collected from the sampling port of the discharge port and immediately sent to a laboratory for viscosity and comprehensive solid content characteristics analysis until the float touches a low liquid level touch switch, the timing is stopped, the time is recorded, the time is statistically analyzed with the laboratory analysis results, and finally the relationship between the slurry falling time and the viscosity and comprehensive solid content characteristics analyzed in the laboratory is applied to an online detection device for slurry viscosity and comprehensive solid content characteristics.

[0028] By adopting the above technical solution, under the same thrust of compressed air, in the same slurry tank, that is, the volume of slurry is the same, the flow rate of slurries with different viscosities and comprehensive solid content characteristics is different, so the flow time of slurries with different viscosities and comprehensive solid content characteristics is different. The viscosity and comprehensive solid content characteristics of the slurry can be obtained based on the flow time of the slurry. The slurry sample is sent to the laboratory for accurate viscosity and comprehensive solid content characteristics analysis, and the accurate relationship between the slurry flow time and the viscosity and comprehensive solid content characteristics of the slurry can be obtained, thereby improving the accuracy of the test results of the online detection device for slurry viscosity and comprehensive solid content characteristics. The laboratory accurately analyzes the viscosity and solid content of the sample in the shortest time, avoiding the impact of long-term storage on the accuracy of the experimental results, increasing timeliness and improving accuracy. Slurry samples are collected from the feed port and the discharge port respectively to avoid the impact of the accuracy of the experimental results due to the randomness of the sample, making the experimental results more representative. Time is recorded by using a float touching a high- and low-level touch switch, preventing viscous slurry from adhering to the switch and affecting its response, thereby improving timing accuracy. This online device for measuring slurry viscosity and solids content can be applied to the recycling of urban organic solid waste and agricultural waste.

[0029] In summary, the present invention has the following beneficial effects:

[0030] 1. Compared with the traditional method of taking out the slurry from the organic waste pretreatment process pipeline and then sending it to the laboratory for testing, this device has better timeliness and better feasibility. Moreover, the combination of this device and the experimental analysis method makes the test results of this device more accurate.

[0031] 2. The structure that uses compressed air to push the slurry to move makes the slurry movement stable, and the high and low liquid level touch switches can measure accurately, so that the timer can measure accurately and obtain accurate viscosity and solid content comprehensive characteristics;

[0032] 3. The test results will not be affected by granular scum, oil and other objects in organic waste, and the service life is long;

[0033] 4. The controller's control program automatically controls the discharge valve, feed valve, exhaust valve, and air intake solenoid valve, achieving interconnected control and ensuring timely switching of each valve. Therefore, the entire device can achieve fully automatic operation;

[0034] 5. The online detection device of slurry viscosity and comprehensive solid content characteristics can be used in the field of urban organic solid waste and agricultural waste resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 The figure is a schematic diagram of the structure of an online detection device for slurry viscosity and solid content comprehensive characteristics;

[0036] Figure 2 A schematic diagram of a high liquid level state of an online detection device for slurry viscosity and solid content comprehensive characteristics;

[0037] Figure 3 A schematic diagram of a low liquid level state of an online detection device for slurry viscosity and solid content comprehensive characteristics;

[0038] Figure 4 The figure is a flow chart of a method for analyzing the comprehensive characteristics of slurry viscosity and solid content in the present invention.

[0039] In the figure: 1. Slurry tank; 2. Feed port; 3. Feed valve; 4. Exhaust valve; 5. Exhaust port; 6. Discharge valve; 7. Discharge port; 8. Air compressor; 9. Air inlet; 10. Air inlet solenoid valve; 11. High liquid level touch switch; 12. Low liquid level touch switch; 13. Thermometer; 14. Safety valve; 15. Pressure reducing valve; 16. Timer; 17. Float. DETAILED DESCRIPTION

[0040] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0041] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

[0042] Example 1

[0043] An online detection device for slurry viscosity and solid content comprehensive characteristics, see Figure 1 , including a slurry tank 1, a discharge valve 6, a feed valve 3, an exhaust valve 4, a timer 16 and an air compressor 8.

[0044] See also Figure 1 The middle part of the slurry tank 1 is cylindrical, and the top and bottom of the slurry tank 1 are both hemispherical. The top of the slurry tank 1 is fixed with an air inlet 9, an exhaust port 5 and a safety valve 14. The end of the cylindrical surface in the middle of the slurry tank 1 near the top is fixed with a high liquid level touch switch 11. The bottom of the slurry tank 1 is fixed with a discharge port 7 and a feed port 2. The end of the cylindrical surface in the middle of the slurry tank 1 near the bottom is fixed with a low liquid level touch switch 12. The slurry tank 1 is provided with a thermometer 13.

[0045] See also Figure 1 The high-level touch switch 11 and the low-level touch switch 12 are both MX-WW-144-08 tuning-fork liquid level limit switches manufactured by Shanghai Meixu Measurement & Control Technology Co., Ltd. The vibrating rod of the tuning-fork liquid level limit switch extends horizontally into the interior of the slurry tank 1, and the housing of the tuning-fork liquid level limit switch is fixedly connected to the outer surface of the slurry tank 1. Both the high-level touch switch 11 and the low-level touch switch 12 are electrically connected to a timer 16.

[0046] See also Figure 1 The discharge port 7 and the feed port 2 both connect the slurry tank 1 with the pipeline of the organic waste pretreatment equipment, and the air inlet 9 connects the slurry tank 1 with the air compressor 8, and the air compressor 8 provides compressed air to the slurry tank 1 through the air inlet 9.

[0047] See also Figure 1 The discharge port 7 is provided with a discharge valve 6, the feed port 2 is provided with a feed valve 3, and the exhaust port 5 is provided with an exhaust valve 4. The discharge valve 6 and the feed valve 3 are both pneumatic knife-type gate valves from Shanghai Jingang Valve Co., Ltd. The exhaust valve 4 is the FSP4X exhaust valve 4 from Wenzhou Zhixin Valve Co., Ltd.

[0048] See also Figure 1 The interior of the slurry tank 1 is provided with a float 17 that floats with the liquid level of the slurry. The middle part of the float 17 is a hollow structure. The ratio of the diameter of the float 17 to the diameter of the slurry tank 1 is 0.8, ensuring that there is a certain gap between the float 17 and the inner wall of the slurry tank 1. The material of the float 17 is a wear-resistant lightweight material, and the density of the float 17 is 0.4 times the measured slurry density.

[0049] See also Figure 1 The air inlet 9 is provided with an air inlet solenoid valve 10 and a pressure reducing valve 15. The pressure reducing valve 15 is closer to the air compressor 8 than the air inlet solenoid valve 10. Both the air inlet solenoid valve 10 and the pressure reducing valve 15 are connected to the slurry tank 1 and the air compressor 8. The pressure reducing valve 15 automatically operates when air passes through. The air inlet solenoid valve 10 is a KLAY air solenoid valve from the German company KLAY.

[0050] See also Figure 1The discharge valve 6, the feed valve 3, the exhaust valve 4, the high liquid level touch switch 11, the low liquid level touch switch 12, the air intake solenoid valve 10 and the timer 16 are all electrically connected to the controller.

[0051] See also Figure 2 and Figure 3 The operating steps are as follows: With all other valves closed, open feed valve 3 and exhaust valve 4. Slurry enters the bottom of slurry tank 1 through feed port 2, pushing float 17 upward until it triggers the high-level trigger switch 11. Simultaneously, close feed valve 3 and exhaust valve 4, stopping feeding. At this point, float 17 is at a high level. Open discharge valve 6 and simultaneously turn on air compressor 8. Air is pumped into slurry tank 1 from air inlet 9, pushing float 17 and the slurry downward. Float 17 leaves the high-level trigger switch 11, at which point timer 16 begins counting. This count continues until float 17 triggers the low-level trigger switch 12, at which point the float 17 is at a low level. Timer 16 stops counting. Simultaneously, close discharge valve 6, turn off air compressor 8, and open exhaust valve 4 to release any remaining compressed air. By observing the time recorded by timer 16 (i.e., the time required for discharge), the viscosity and solids content of the slurry can be determined. The online detection device for slurry viscosity and comprehensive solid content characteristics can be used in the field of urban organic solid waste and agricultural waste resource utilization.

[0052] Example 2

[0053] A method for analyzing the viscosity and solid content of slurry is suitable for an online detection device for the viscosity and solid content of slurry in Example 1. The feed port 2 and the discharge port 7 are respectively provided with three sampling ports. Figure 4 ,include:

[0054] Step S1: The controller sends a valve opening signal to the feed valve 3 and the exhaust valve 4. The feed valve 3 and the exhaust valve 4 open, the slurry enters the slurry tank 1 from the feed port 2, the float 17 rises with the liquid level of the slurry, and the exhaust valve 4 discharges the gas in the slurry tank 1.

[0055] Step S2: Slurry is collected from the three sampling ports of the feed port 2, and the slurries taken from the three sampling ports are mixed. The mixed slurry is sent to the laboratory for accurate testing of viscosity and solid content comprehensive properties.

[0056] Step S3: When the float 17 rises to touch the high liquid level touch switch 11, the high liquid level touch switch 11 sends a high liquid level reaching signal to the controller. After receiving the signal, the controller sends a valve closing signal to the feed valve 3 and the exhaust valve 4. The feed valve 3 and the exhaust valve 4 are closed, and the feeding is stopped.

[0057] Step S4: The controller sends a signal to the discharge valve 6 and the air inlet solenoid valve 10 to open the valves and sends a signal to the air compressor 8 to deliver air to the slurry tank 1. The discharge valve 6 and the air inlet solenoid valve 10 are opened, the air compressor 8 starts working, and presses air into the slurry tank 1 from the air inlet 9.

[0058] Step S5: The slurry is discharged from the slurry tank 1 through the discharge port 7. The float 17 drops along with the slurry level, and the float 17 leaves the high liquid level trigger switch 11. The high liquid level trigger switch 11 sends a signal to the controller indicating that the float 17 has left the high liquid level. After receiving the signal, the controller sends a start signal to the timer 16, and the timer 16 starts timing.

[0059] Step S6: Slurry is collected from the three sampling ports of the discharge port 7, and the slurries taken from the three sampling ports are mixed. The mixed slurry is sent to the laboratory for accurate testing of viscosity and comprehensive solid content characteristics.

[0060] Step S7: When the float 17 drops to touch the low liquid level touch switch 12, the low liquid level touch switch 12 sends a low liquid level signal to the controller. After receiving the signal, the controller sends a valve closing signal to the discharge valve 6 and the air intake solenoid valve 10 and sends a signal to the air compressor 8 to stop supplying air. The discharge valve 6 and the air intake solenoid valve 10 are closed, the air compressor 8 stops working and stops discharging. At the same time, the controller also sends a stop timing signal to the timer 16, the timer 16 stops timing and records the time.

[0061] Step S8: Summarize the relationship between the laboratory analysis results of the viscosity and solid comprehensive characteristics of the slurry sampled from the feed port 2 and the discharge port 7 and the time recorded by the timer 16, and apply the conclusions to an online detection device for the slurry viscosity and solid comprehensive characteristics.

[0062] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An online detection device for slurry viscosity and solid content comprehensive characteristics, characterized by: include A slurry tank (1) is provided with an air inlet (9), an exhaust port (5) and a high liquid level touch switch (11) at the top, and a discharge port (7), a feed port (2) and a low liquid level touch switch (12) at the bottom, wherein the air inlet (9) is connected to an air compressor (8), the discharge port (7) and the feed port (2) are both connected to the pipeline of an organic waste pretreatment device, the exhaust port (5) is provided with an exhaust valve (4), the discharge port (7) is provided with a discharge valve (6), and the feed port (2) is provided with a feed valve (3); the top and bottom of the slurry tank (1) are both hemispherical; the air inlet (9) is provided with an air inlet solenoid valve (10), and the discharge valve (6), the feed valve (3), the exhaust valve (4), the high liquid level touch switch (11), the low liquid level touch switch (12) and the air inlet solenoid valve (10) are all automatic control valves and are electrically connected to a controller; A float (17) floats on the liquid surface of the slurry inside the slurry tank (1), the middle of the float (17) is a hollow structure, the ratio of the diameter of the float (17) to the diameter of the slurry tank (1) is 0.7-0.9, and the density of the float (17) is 0.4 times the measured slurry density; The timer (16) starts timing when the float (17) leaves the high liquid level touch switch (11) and stops timing when the float (17) reaches the low liquid level touch switch (12), and displays the timing time.

2. The online detection device for slurry viscosity and solid content comprehensive characteristics according to claim 1, characterized in that: A safety valve (14) is provided on the top of the slurry tank (1).

3. The online detection device for slurry viscosity and solid content comprehensive characteristics according to claim 1, characterized in that: The slurry tank (1) is provided with a thermometer (13).

4. The online detection device for slurry viscosity and solid content comprehensive characteristics according to claim 1, characterized in that: The material of the float (17) is a wear-resistant light material.

5. A method for analyzing the comprehensive characteristics of slurry viscosity and solid content, characterized in that: The device is suitable for detecting the viscosity and the comprehensive characteristics of solid content of slurry as claimed in claim 1. The feed port (2) and the discharge port (7) are both provided with sampling ports. When the feed valve (3) and the exhaust valve (4) are both opened and the feed port (2) starts to feed, the slurry sample is collected from the sampling port of the feed port (2) and immediately sent to the laboratory for viscosity and comprehensive characteristics analysis. When the float (17) touches the high liquid level touch switch (11), the feed valve (3) and the exhaust valve (4) are both closed, the discharge valve (6) and the air inlet solenoid valve (10) are opened, and the air compressor (8) starts to operate. Compressed air is supplied to the slurry tank (1), the float (17) leaves the high liquid level touch switch (11), the timer (16) starts timing, and the slurry sample is collected from the sampling port of the discharge port (7) and immediately sent to the laboratory for viscosity and solid content comprehensive property analysis until the float (17) touches the low liquid level touch switch (12). The timing is stopped and the time is recorded. The time is statistically analyzed with the laboratory analysis results. Finally, the relationship between the slurry falling time and the viscosity and solid content comprehensive property analyzed in the laboratory is applied to the online detection device of slurry viscosity and solid content comprehensive property.

Images