Automatic control device of liquid phase classifier

Abstract

The utility model discloses an automatic control device of a liquid phase classifier. The automatic control device comprises a feeding electric control valve arranged on each distribution pipe, an overflow pipe of each cyclone is provided with an overflow electric control valve; the sensing assembly is used for detecting whether fluid passes through each underflow pipe at the lower end of each underflow discharging opening or not; the flushing device is communicated with a liquid-phase medium source and used for dredging blockage of the bottom flow discharge port, a liquid-phase medium outlet pipe of the flushing device is connected with the overflow pipe at the lower end of each overflow electric control valve in parallel, and a liquid-phase medium electric control valve is arranged on the liquid-phase medium outlet pipe; the feeding electric control valve, the overflow electric control valve, the sensing assembly, the flushing device and the liquid-phase medium electric control valve are all electrically connected with the controller. The automatic control device of the liquid phase classifier can automatically monitor the blockage condition of the bottom flow discharge port of any cyclone in the cyclone group, can find the blockage of the bottom flow discharge port in real time, and can automatically dredge the blockage.

Description

TECHNICAL FIELD

[0001] The utility model relates to material grading and automatic control technical field, specifically is a kind of automatic control device of liquid phase classifier. BACKGROUND

[0002] The basic principle of liquid-solid cyclone separation is to use the centrifugal force generated by the high-speed rotation of dispersed phase particles and continuous phase fluid around the center axis of cyclone to realize the distribution of liquid-solid two-phase or multi-phase with density difference at different positions in the radial direction of cyclone, wherein the heavy phase migrates to the edge wall of cyclone and is finally discharged from the underflow outlet, while the light phase migrates to the center of cyclone and is finally discharged through the overflow pipe, thereby realizing the separation of heterogeneous mixture. In recent years, a middle flow pipe is also provided below the overflow pipe to obtain an intermediate phase between the heavy phase and the light phase. Moreover, the separation precision of cyclone has developed from micrometer level to nanometer level.

[0003] In the prior art, technicians usually reduce the cyclone aperture to 1-5 cm to improve the grading precision of nanometer-level particles. However, the cyclone with small diameter size will significantly reduce the material processing capacity, so in industrial applications, multiple cyclones are usually connected in parallel to form a cyclone group, and the cyclones are arranged in the same shell.

[0004] Due to the characteristics of the classified slurry, particles of different sizes collide in the cyclone, and the centrifugal principle of the cyclone itself causes some larger particles to deposit on the inner wall of the cyclone. Over time, they will continuously accumulate at the underflow outlet of the cyclone, eventually causing the underflow outlet to be blocked. The blockage of the underflow outlet of one or more cyclones not only causes larger particles to flow out through the overflow, thereby reducing the grading precision, but also affects the production efficiency of the entire cyclone group.

[0005] In the prior art, when such problems occur, artificial unblocking is usually used. However, artificial unblocking has the following disadvantages: first, it increases labor costs; second, it is difficult to discover blockage in a timely manner, resulting in poor grading effect after blockage, and if rework is performed, it increases repetitive labor; third, during the artificial unblocking process, all equipment needs to be temporarily stopped, which affects the overall grading operation, reduces production efficiency, and reduces production output. This artificial unblocking problem has been a technical problem in this technical field that has not been well solved. UTILITY MODEL CONTENTS

[0006] The technical problem to be solved by the utility model is to provide an automatic control device for a liquid phase classifier that can automatically monitor the unblocking status of the underflow outlet of any cyclone in a cyclone group, can discover blockage of the underflow outlet in real time, and can automatically unblock the blockage.

[0007] The utility model discloses a technical solution is to provide a kind of automatic control device of liquid phase classifier, including feed distributor and the multiple cyclones around feed distributor, feed distributor is communicated with every cyclone feed inlet one-to-one by respective distribution pipe, the overflow outlet of every cyclone is communicated with overflow collector by respective overflow pipe, the underflow outlet of cyclone is communicated with underflow collector by underflow pipe, pressure drive device is communicated with feed distributor feed inlet by pipeline;Every distribution pipe has a feed electric control valve;Every overflow pipe has a overflow electric control valve;Still include the sensing component of whether every underflow pipe under each underflow outlet has fluid passing;Still include flush device for communicating with liquid phase medium source and for dredging underflow outlet blockage, the overflow pipe of the liquid outlet pipe of liquid phase medium under every overflow electric control valve end of flush device is parallelly connected, and there is liquid phase medium electric control valve on the liquid outlet pipe of liquid phase medium;Still include controller, the feed electric control valve, overflow electric control valve, sensing component, flush device, liquid phase medium electric control valve are electrically connected with controller.

[0008] After using the above structure, the automatic control device of the liquid phase classifier has the following advantages: it can automatically monitor the unobstructed or blocked condition of the underflow port of any cyclone in the cyclone group, it can quickly and timely find the blockage of the underflow port and automatically dredge the blockage. It not only reduces the labor cost, but also reduces the problem of poor classification effect caused by not timely finding the underflow blockage, and if rework is required, it increases repetitive labor. In the dredging process of each cyclone, the normal classification operation of the cyclone group or the liquid phase classifier does not need to be stopped, which improves the classification efficiency of the equipment, ensures high production efficiency, and improves the classification production yield. It well solves the technical problems that have been expected to be solved for many years in this technical field but have not been well solved.

[0009] Further, the sensing component includes a transmitter that always emits an electric signal and a receiver that indicates blockage of the underflow port when the received electric signal is 0; the receiver in the sensing component is electrically connected with the controller; the transmitter and the receiver are respectively arranged on both sides of the underflow pipe. After using the above specific structure of the sensing component, the real-time performance, stability, reliability and accuracy of the sensing component are better.

[0010] Further, the transmitter is a plurality of transmitters same as the number of underflow pipes, and the receiver is a plurality of receivers same as the number of underflow pipes; the underflow pipe is externally fixed with a sensing component fixing frame, and the transmitter and the receiver are symmetrically arranged along the circumference of the sensing component fixing frame. After using the above specific structure of the transmitter in the sensing component, the real-time performance is better, and the accuracy is higher.

[0011] Further, the transmitter is one, the transmitter is 360 ° transmitter of electric signal, transmitter is arranged in the middle of the underflow pipe of the radially arranged multiple cyclone; the receiver is multiple same as the number of underflow pipe, each receiver is arranged on the back surface of the underflow pipe away from the receiver, the transmitter and all receivers are not blocked except the corresponding underflow pipe. After the transmitter in the sensing assembly adopts the specific structure of the above one, under the premise of ensuring the real-time, stability, reliability and accuracy of the sensing assembly, the installation is relatively simple, and the component cost is relatively low.

[0012] Further, the underflow pipe is a transparent pipe. After adopting the above structure, the accuracy and reliability of monitoring are higher for the slurry with different properties.

[0013] Further, the controller is a PLC control module; further comprising a data screen display control module electrically connected with the PLC control module; further comprising an audible and visual alarm device electrically connected with the PLC control module; the flushing device is a high-pressure liquid injection gun or a high-pressure hydraulic pump. The high pressure is 1.6-2.0MPA. After adopting the above structure, the real-time condition of the cyclone group is more intuitive through the display screen of the data screen display control module and the audible and visual alarm of the real-time condition of the cyclone group. The flushing effect is better and the flushing time is shorter. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the connection structure schematic diagram of the automatic control device embodiment of the liquid phase classifier of the utility model (in which the wires of electric connection are not shown in the drawing, only the solid line of pipeline connection is shown; in which the cyclone and the feed distributor are vertical section view).

[0015] Figure 2 It is Figure 1 The enlarged structure schematic diagram of A in figure

[0016] Figure 3 It is the horizontal section view schematic diagram of the feed distributor and the cyclone connection in the embodiment of the utility model.

[0017] Figure 4 It is the structure schematic diagram of one transmitter and multiple receivers in the embodiment of the utility model (in which the shell is horizontal section view).

[0018] The shown in the drawing:

[0019] 1. Liquid phase classifier, 11. Distributing pipe, 12. Cyclone, 121. Cyclone feed inlet, 122. Overflow outlet, 123. Underflow outlet, 124. Inverted cone hole, 125. Midflow outlet, 126. Overflow channel, 127. Midflow channel, 13. Feed distributor, 131. Feed distributor feed inlet, 14. Overflow pipe, 15. Overflow collector, 16. Underflow pipe, 17. Underflow collector, 18. Hydraulic pump, 19. Slurry tank, 110. Housing, 111. Midflow collector, 112. Midflow pipe;

[0020] 2. Automatic control device, 21. Feed electric control valve, 22. Overflow electric control valve, 23. Sensing assembly, 231. Transmitter, 2311. First transmitter, 2312. Second transmitter, 232. Receiver, 2321. First receiver, 2322. Second receiver, 24. Liquid phase medium tank, 25. Flushing device, 251. Liquid outlet pipe, 26. Liquid phase medium electric control valve, 27. PLC control module, 28. Data screen display control module, 29. Acousto-optic alarm device, 210. Midflow electric control valve. DETAILED DESCRIPTION

[0021] The specific embodiments of the present application will be further described below with reference to the drawings. It needs to be declared here that the description of these specific embodiments is used to help understand the present application, but does not constitute a limitation to the present application. In addition, the technical features involved in each specific embodiment of the present application described below can be combined with each other as long as there is no conflict.

[0022] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 .

[0023] The embodiment of the automatic control device of the liquid phase classifier, the liquid phase classifier 1 comprises a feed distributor 13 and a plurality of cyclones 12 surrounding the feed distributor 13, the feed distributor 13 is in one-to-one correspondence with each cyclone feed port 121 through a respective distribution pipe 11, the overflow outlet port 122 of each cyclone 12 is communicated with the overflow collector 15 through a respective overflow pipe 14, the underflow outlet port 123 of the cyclone 12 is communicated with the underflow collector 17 through the underflow pipe 16, and the pressure driving device such as the hydraulic pump 18 is communicated with the feed distributor feed port 131 through a pipeline and a slurry source such as a slurry pool 19. It is not difficult to understand that if deionized water classification is adopted, the liquid phase classifier is also called a hydraulic classifier. The underflow outlet port 123 is also called an underflow port. The distribution pipe 11 is also called a feed pipe. The central hole or inner hole of a single cyclone 12, such as a reverse tapered hole 124, generally has a diameter of 1-5 cm, i.e. 1-5 cm, such as a small diameter of 1 cm and a large diameter of 5 cm, which is called a micro cyclone 12 in the industry. The reverse tapered hole 124 is also called a reverse tapered hole. The top end of the reverse tapered hole 124 is communicated with the overflow outlet port 122 through an overflow passage 126. The micro cyclone 12 is used to improve the classification accuracy of nanoscale particles, and a plurality of micro cyclones 12 are connected in parallel to form a cyclone group and are arranged in the same shell 110 to improve the material processing capacity and improve the production efficiency. The specific distribution can be that the center of the shell 110 is the feed distributor 13, a plurality of cyclones 12 are uniformly distributed on the concentric circle of the feed distributor 13 around the center, each cyclone 12 is also called a single cyclone 12 or each cyclone 12, the center of the feed distributor 13 and the plurality of cyclones 12 are located in the same shell 110, the feed distributor 13 is communicated with each cyclone 12 through a plurality of radial distribution pipes 11, and the arrangement has the advantages that the feed uniformity caused by the different positions of the cyclones 12 in the cyclone group can be prevented. Each cyclone 12 has a respective single distribution pipe 11, i.e. a feed pipe, a single overflow pipe 14 and a single underflow pipe 16. A middle flow outlet port 125 can also be arranged below the overflow outlet port 122 of the cyclone 12, the middle flow outlet port 125 is communicated with the overflow passage 126 through a middle flow passage 127, and the middle flow outlet port 125 is communicated with a middle flow collector 210 through a middle flow pipe 112. The middle flow collector 210 can also be communicated with the hydraulic pump 18 and the slurry pool 19 through a pipe. It is not difficult to understand that in the prior art, valves (which can be manually controlled or electrically controlled) can be arranged in front of the overflow collector, the underflow collector, the slurry pool and the middle flow collector to facilitate cleaning and maintenance, and the middle flow collector and the underflow collector need to be backflowed for secondary or tertiary classification, but these have little relevance to the control device in normal classification operation in the following invention points of the present application, and the above valves are in an open state in normal classification operation. In order to avoid confusion between the above valves in the figure and the electrically controlled valves in the following invention points of the present application, the above-mentioned valves are not shown in the figure. The above is the prior art.

[0024] The invention points of the utility model are as follows.

[0025] The structure of the automatic control device 2 is that each distribution pipe 11 is provided with a feeding electric control valve 21, and each overflow pipe 14 is provided with an overflow electric control valve 22. In the embodiment of the automatic control device of the liquid phase classifier, the automatic control device 2 further comprises a sensing assembly 23 for detecting whether each underflow pipe 16 under the lower end of each underflow discharge port 123 has fluid passing through. In the embodiment of the automatic control device of the liquid phase classifier, the automatic control device 2 further comprises a flushing device 25 in communication with a liquid medium tank 24 such as a deionized water tank and used for dredging the underflow discharge port 123. The liquid outlet pipe 251 of the liquid medium of the flushing device 25 such as the water outlet pipe of the deionized water is connected in parallel with the overflow pipe 14 at the lower end of each overflow electric control valve 22, and the liquid outlet pipe 251 of the liquid medium such as the water outlet pipe of the deionized water is provided with a liquid medium electric control valve 26 such as a deionized water electric control valve. In the embodiment of the automatic control device of the liquid phase classifier, the automatic control device 2 further comprises a controller such as a PLC control module 27, and the feeding electric control valve 21, the overflow electric control valve 22, the sensing assembly 23, the flushing device 25 and the liquid medium electric control valve 26 are electrically connected with the controller such as the PLC control module 27. It can be understood that if the liquid phase classifier 1 is provided with a middle flow pipe 112 and a middle flow collector 210, a middle flow electric control valve 210 is further arranged at the position of the middle flow pipe 112 close to the middle flow discharge port 125, and the middle flow electric control valve 210 is also electrically connected with the controller such as the PLC control module 27. It can be understood that the electric control valve such as an electric control ball valve can be an electromagnetic valve which is opened or closed by a relay.

[0026] The sensing assembly 23 comprises a transmitter 231 always emitting an electric signal and a receiver 232 indicating that the underflow discharge port 123 is blocked when the received electric signal is 0. The receiver 232 in the sensing assembly 23 is electrically connected with the controller such as the PLC control module 27. The transmitter 231 and the receiver 232 are respectively arranged on the two sides of the underflow pipe 16, which can be called symmetrically on both sides or opposite sides, and can be understood as being arranged at the two ends of the extension line of the same diameter line of the underflow pipe 16.

[0027] As shown in Figure 1 The transmitter 231 such as the first transmitter 2311 can be a plurality of transmitters with the same number as the underflow pipe 16, and the receiver 232 such as the first receiver 2321 can also be a plurality of receivers with the same number as the underflow pipe 16. The underflow pipe 16 can be fixed by a hoop type sensing assembly fixing frame, and the first transmitter 2311 and the first receiver 2321 can be symmetrically arranged along the circumference of the sensing assembly fixing frame.

[0028] As shown in Figure 4The transmitter 231 is shown in the figures, or the transmitter 231 can be one, and the second transmitter 2312 is a 360° transmitter 2312, which is arranged in the middle of the plurality of underflow pipes 16 of the plurality of cyclones 12 arranged in a radial manner. The receiver 232 is shown in the figures, or the receiver 232 can be one, and the second receiver 2322 is a plurality of receivers 2322, which is equal to the number of the underflow pipes 16, and each second receiver 2322 is arranged on the back of the underflow pipe 16 away from the second receiver 2322 and can be fixed by a second receiver fixing frame, and there is no other obstruction between the second transmitter 2312 and all the second receivers 2322 except the corresponding underflow pipe 16. The plurality of cyclones 12 are arranged uniformly along the same circle, and the second transmitter 2312 can be arranged in the middle or center of the circle of the cavity of the shell 110, and the second transmitter 2312 and each second receiver 2322 can be in the same horizontal plane, and the feed distributor 13 can not extend downward to block the 360° signal transmission of the second transmitter 2312, but can avoid it by using a bent pipe or the like.

[0029] The underflow pipe 16 is preferably a transparent pipe.

[0030] It is not difficult to understand that the sensing assembly 23 can adopt different sensing assemblies 23 according to different properties of the classified slurry. For example, the general property slurry can adopt an infrared light sensing assembly, such as an infrared light transmitter and an infrared light receiver or an infrared light sensor, which is also called an infrared light transmitter and an infrared light receiver in the industry. For another example, some slurry has high viscosity and is easy to adhere to the inner wall of the underflow pipe, and then a laser sensor or an electromagnetic sensor can be used, in which the transmitter of the laser sensor is a laser generator, and the receiver is a laser receiver; and the transmitter of the electromagnetic sensor is a transmitting end, and the receiver is a receiving end.

[0031] As described above, the controller can be a PLC control module 27, also called a PLC programmable controller or a PLC chip, which can be installed in a control box and can also have an auxiliary circuit board. In the embodiment of the automatic control device 2 of the liquid classifier of the utility model, the automatic control device 2 can also include a data screen display control module 28 electrically connected with the PLC control module 27, and the data screen display control module 28 at least includes a display screen. The controller and the data screen display control module can also use a computer, such as a handheld computer to replace it. In the embodiment of the automatic control device 2 of the liquid classifier of the utility model, the automatic control device 2 can also include an audible and visual alarm device 29 such as a flashing light and a voice reminder device electrically connected with the PLC control module 27.

[0032] The flushing device 25 can be a high-pressure liquid injection gun or a high-pressure hydraulic pump. The high-pressure liquid injection gun is also called a high-pressure injector, such as a high-pressure water gun. The high-pressure hydraulic pump is, for example, a high-pressure water pump. The high pressure is 1.6-2.0 MPA. It is understood that the high-pressure water gun or the high-pressure water pump is started or stopped by a relay, and the relay is electrically connected to the controller PLC control module 27. The controller is also called the main controller.

[0033] The liquid medium can be deionized water, alcohol (i.e., ethanol), or ethylene glycol, etc.

[0034] The control process of the automatic control device of the hydraulic classifier of the utility model comprises the following steps:

[0035] 1) The sensing assembly 23 always monitors the underflow pipe 16 and transmits an electrical signal to the controller, such as the PLC control module 27.

[0036] When the receiver 232 receives an electrical signal of 0, it indicates that the underflow outlet 122 is blocked. When this electrical signal lasts for 5 seconds, the controller, such as the PLC control module 27, determines that the underflow outlet 123 is blocked. When the transmitter 231 always transmits an electrical signal and the receiver 232 receives an electrical signal of 1, it indicates that the underflow outlet 123 is unblocked. When this electrical signal lasts for 5 seconds, the controller, such as the PLC control module 27, determines that the underflow outlet 123 is unblocked.

[0037] The cyclones 12 can be sequentially numbered or referred to as sequentially numbered, and the sensing assembly 23, the overflow electric control valve 22, and the feeding electric control valve 21 of the underflow pipe 16 corresponding to each cyclone 12 are numbered with the number of the corresponding cyclone 12 as the first character. The opening and closing of each electric control valve during the flushing process of the underflow outlet 123 of a cyclone 12 or a certain cyclone 12, and the unblocking of the underflow outlet 123, are all displayed on the display screen of the data screen display control module 28 with the number. When the underflow outlet 123 of the cyclone 12 is blocked and the audible and visual alarm 29 alarms, the number is also displayed.

[0038] When the controller, such as the PLC control module 27, detects in real time that there is no fluid falling in the underflow pipe 16, i.e., the underflow outlet 123 is blocked, the controller, such as the PLC control module 27, controls the closing of the feeding electric control valve 21 and the overflow electric control valve 22 of the single cyclone 12, and simultaneously controls the starting of the flushing device 25 and the opening of the deionized water electric control valve 26 to flush the overflow channel 126, the inverted conical hole 124, and the underflow outlet 123 of the single cyclone 12 from the top down. The predetermined time for flushing can be 5-90 seconds, preferably 5-30 seconds, i.e., 5-30 seconds.

[0039] 2) after flushing for a predetermined time, such as 30 seconds, the controller, such as the PLC control module 27, controls to stop the flushing device 25 and close the liquid medium electric valve 26, such as the deionized water electric valve; at this time, the controller, such as the PLC control module 27, detects the electrical signal returned by the sensing assembly 23 in real time, if it is still a blockage signal, returns to the flushing action in step 1) to clean again, if it is a smooth signal, it is transferred to step 3).

[0040] 3) the controller, such as the PLC control module 27, controls to stop the flushing device 25 and close the liquid medium electric valve 26, such as the deionized water electric valve, and the controller, such as the PLC control module 27, controls to open the feed electric valve 21 and the overflow electric valve 22 of the single cyclone 12, and the single cyclone 12 enters the normal working state.

[0041] It is not difficult to understand that if the liquid phase classifier 1 is provided with the middle flow pipe 112, the middle flow collector 111 and the middle flow electric valve 210, in the above control process, when the overflow electric valve 22 is closed, the controller, such as the PLC control module 27, also controls the relay to close the middle flow electric valve 210; when the overflow electric valve 22 is opened, the controller, such as the PLC control module 27, also controls the relay to open the middle flow electric valve 210.

[0042] The above unmarked parts or structures or quantities are not shown in the figure, and some parts are not marked in the figure. The drawings are only schematic, and if there are inconsistencies between the drawings and the written description, or between the drawings and each other, the written description shall prevail.

[0043] The above only describes the preferred embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic control device for a liquid phase classifier comprising a feed distributor and a plurality of cyclones surrounding the feed distributor, the feed distributor being in communication with the feed inlet of each cyclone via a respective distribution pipe, the overflow outlet of each cyclone being in communication with an overflow collector via a respective overflow pipe, the underflow outlet of each cyclone being in communication with an underflow collector via an underflow pipe, and a pressure driven device being in communication via a pipe with a source of slurry and the feed inlet of the feed distributor; characterised in that: Each distribution pipe has a feed electric control valve; each overflow pipe has an overflow electric control valve; further comprising a sensing assembly detecting whether each underflow pipe has fluid passing; further comprising a flushing device communicating with a liquid phase medium source and used for unblocking the underflow discharge port, the liquid outlet pipe of the liquid phase medium of the flushing device is connected in parallel with the overflow pipe under the under end of each overflow electric control valve, and the liquid outlet pipe of the liquid phase medium has a deionized water electric control valve; further comprising a controller, the feed electric control valve, the overflow electric control valve, the sensing assembly, the flushing device, and the liquid phase medium electric control valve are electrically connected with the controller.

2. The automatic control device for a liquid fractionator according to claim 1, characterized by: The sensing assembly comprises a transmitter always emitting an electric signal and a receiver indicating that the underflow discharge port is blocked when the received electric signal is 0; the receiver in the sensing assembly is electrically connected with the controller; the transmitter and the receiver are respectively arranged on both sides of the underflow pipe.

3. The automatic control device for a liquid fractionator according to claim 2, characterized by: The transmitter is a plurality of transmitters same in number with the underflow pipes, and the receiver is a plurality of receivers same in number with the underflow pipes; the underflow pipe is externally fixed with a sensing assembly fixing frame, and the transmitter and the receiver are symmetrically arranged along the circumference of the sensing assembly fixing frame.

4. The automatic control device for a liquid fractionator according to claim 2, characterized by: The transmitter is one, the transmitter is a 360° transmitter, and the transmitter is arranged in the middle of the underflow pipes of the plurality of cyclones arranged in a radial manner; the receiver is a plurality of receivers same in number with the underflow pipes, each receiver is arranged on the back surface of the underflow pipe away from the receiver, and there is no other shielding object between the one transmitter and all the receivers except the corresponding underflow pipe.

5. An automatic control device for a liquid fractionator according to claim 3 or 4, characterized in that: The underflow pipe is a transparent pipe.

6. The automatic control device for a liquid fractionator according to claim 1, wherein: The controller is a PLC control module; further comprising a data screen display control module electrically connected with the PLC control module; further comprising an audible and visual alarm device electrically connected with the PLC control module; the flushing device is a high-pressure liquid injection gun or a high-pressure hydraulic pump, and the high pressure is 1.6-2.0MPA.

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