Cyclone underflow monitoring system

Abstract

The utility model relates to the field of metering and calibration equipment matching devices, in particular to a cyclone underflow monitoring system which is used for monitoring the underflow state of a cyclone and comprises the cyclone, an underflow opening of the cyclone is formed in an inlet of a grit chamber, and underflow subjected to centrifugal separation is discharged from the underflow opening to reach the grit chamber; the device further comprises at least one group of sensors, and the at least one group of sensors are arranged below the underflow opening, located in a dense area of underflow flowing out of the underflow opening and used for detecting the shape of the underflow. According to the underflow monitoring system, the normal state or the abnormal state is distinguished by detecting the underflow coverage area, and accurate monitoring of the underflow state is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of equipment matching devices for metrology and calibration, in particular to a cyclone underflow monitoring system. BACKGROUND

[0002] Hydraulic classification cyclone is a kind of high-efficiency separation and classification equipment widely used in coal slime water treatment operation of coal preparation plant, and is widely used in pre-selection desliming classification, medium recovery, coal slime water concentration and other operations of coal preparation plant. In actual operation, due to improper control of physical property parameters, unreasonable matching of structure parameters and other factors, coal slime water may appear columnar from the underflow port, and even the underflow port may be blocked, which seriously affects the treatment effect of the hydraulic classification cyclone and even causes the hydraulic classification cyclone to be unable to operate normally.

[0003] At present, the underflow port operation monitoring state of the hydraulic classification cyclone still follows the traditional manual checking method, and some detection methods such as checking the vibration of the hydraulic classification cyclone, detecting the inlet pressure and overflow pressure of the cyclone and electromagnetic induction are also used. However, most of the cyclones are installed at a high position, and the on-site operation environment is deviated, so manual observation is very inconvenient. In addition, there are problems and phenomena such as large error in detecting the vibration of the cyclone, detecting the inlet pressure and overflow pressure of the cyclone and other parameters, and the measurement coil of the electromagnetic induction measurement method is placed below the underflow port, so the induction coil and the measurement electrode are easily disturbed by the coal slime water and are not easy to check and handle, and the detection accuracy and effect will be disturbed and affected to a certain extent. CONTENT OF THE UTILITY MODEL

[0004] The present application aims to provide a cyclone underflow monitoring system.

[0005] The embodiments of the present application can be realized by the following technical solutions:

[0006] A cyclone underflow monitoring system for monitoring the underflow state of a cyclone, comprising a cyclone, wherein the underflow port of the cyclone is arranged at the inlet of a sand settling tank, and the underflow after centrifugal separation is discharged from the underflow port to the sand settling tank.

[0007] Further, at least one set of sensors is arranged below the underflow port and located in the dense area of the underflow flowing out of the underflow port, for detecting the shape of the underflow.

[0008] Further, the extension line of the line connecting the sensor and the center point of the underflow port intersects with the center line of the underflow port, and the included angle formed is 10°-15°.

[0009] Further, the sensor is arranged in a reflection type, the sensor comprises a transmitter and a receiver, the transmitter and the receiver are arranged in the same sensor, the sensor is arranged on one side of the underflow outlet, and a reflecting plate is arranged on the other side corresponding to the sensor, and a line between the sensor and the reflecting plate intersects with the direction of underflow discharge.

[0010] Further, the sensor is arranged in a reflection type, the sensor comprises a transmitter and a receiver, the transmitter and the receiver are arranged in the same sensor, the sensor is arranged on one side of the underflow outlet, and a reflecting plate is arranged on the other side corresponding to the sensor, and a line between the sensor and the reflecting plate intersects with the direction of underflow discharge.

[0011] Further, the sensor is arranged in a reflection type, the sensor comprises a transmitter and a receiver, the transmitter and the receiver are arranged in the same sensor, the sensor is arranged on one side of the underflow outlet, and a reflecting plate is arranged on the other side corresponding to the sensor, and a line between the sensor and the reflecting plate intersects with the direction of underflow discharge.

[0012] Further, the sensor is arranged in a reflection type, the sensor comprises a transmitter and a receiver, the transmitter and the receiver are arranged in the same sensor, the sensor is arranged on one side of the underflow outlet, and a reflecting plate is arranged on the other side corresponding to the sensor, and a line between the sensor and the reflecting plate intersects with the direction of underflow discharge.

[0013] Further, the sensor is arranged in a reflection type, the sensor comprises a transmitter and a receiver, the transmitter and the receiver are arranged in the same sensor, the sensor is arranged on one side of the underflow outlet, and a reflecting plate is arranged on the other side corresponding to the sensor, and a line between the sensor and the reflecting plate intersects with the direction of underflow discharge.

[0014] The cyclone underflow monitoring system provided by the embodiment has at least the following beneficial effects:

[0015] 1. The cyclone underflow monitoring system in the application realizes real-time monitoring of the underflow state by monitoring parameters such as the spatial coverage change and the occupied area of the underflow, and further judges whether the underflow outlet is in a normal state or is blocked, so that reliable state monitoring can be provided without affecting the normal operation of the cyclone, thereby providing important support for production process optimization and fault prevention.

[0016] 2. The protection cover and the flow guide plate arranged in the application cooperate with each other and form an avoidance space, which can effectively block the splashing of pollutants or underflow, and the flow guide plate further reduces the possibility of sensor contamination, thereby prolonging the service life of the sensor and providing a safer and more stable working environment for the sensor. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a partial schematic view of a cyclone underflow monitoring system in the application;

[0018] Figure 2 FIG. 4 is a structural view of a sensor and a sliding rail in the application.

[0019] Figure 3 Figure 1 is a structural diagram of a protective cover and a flow guide plate in the present application;

[0020] Figure 4 Figure 2 is a schematic diagram of a cyclone underflow monitoring system in the present application.

[0021] The figure marks: 1-sensor, 2-slideway, 3-protective cover, 4-flow guide plate, 5-cyclone, 51-underflow port, 6-sand trap. DETAILED DESCRIPTION

[0022] Hereinafter, the present application is further described based on the preferred embodiments and with reference to the accompanying drawings.

[0023] In addition, for the convenience of understanding, various components on the drawing are enlarged (thick) or reduced (thin), but this practice is not intended to limit the scope of protection of the present application.

[0024] The singular form of the word also includes the plural meaning, and vice versa.

[0025] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship of the product of the present application when it is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, in the description of the present application, in order to distinguish different units, the first, second and the like are used in the specification, but these are not limited by the order of manufacture, and cannot be understood as indicating or implying relative importance, and the name may be different in the detailed description and claims of the present application.

[0026] The words in the specification are used to illustrate the embodiments of the present application, but are not intended to limit the present application. It should be noted that, unless otherwise explicitly specified and limited, if the terms "provided", "connected", "connected" appear, they should be understood in a broad sense, for example, they can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, can be directly connected, or indirectly connected through an intermediate medium, or can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be specifically understood.

[0027] The present application provides a cyclone underflow monitoring system, Figure 1 Figure 2 is a schematic diagram of a cyclone underflow monitoring system in the present application. Figure 1As shown, a cyclone underflow monitoring system for monitoring the underflow state of a cyclone, comprising a cyclone 5, an underflow port 51 of the cyclone 5 is arranged at the inlet of a grit chamber 6, and the underflow after centrifugal separation is discharged from the underflow port 51 to the grit chamber 6. Further comprising at least one set of sensors 1, at least one set of sensors 1 is arranged below the underflow port 51 and located in the dense area of the underflow flowing out of the underflow port 51. At the same time, the sensor 1 in the application adopts a reflection type layout or a reflection type layout to detect the shape of the underflow, so as to detect the spatial coverage change of the underflow.

[0028] Further, in order to improve the accuracy of monitoring, the sensor 1 is arranged in the dense area of the underflow flowing out, that is, the area closest to the underflow port 51. Wherein, the extension line of the center line of the sensor 1 and the underflow port 51 intersects with the center line of the underflow port 51, and the included angle formed is 10°-15°. The setting of the angle neither makes the sensor 1 too close to the underflow port 51 to be directly impacted, nor makes it away from the underflow port 51 to lose the effective monitoring range. At the same time, under different working conditions, the flow rate, flow and composition of the underflow may be different, and the angle design can adapt to these changes to a certain extent, and ensure that the sensor can maintain stable monitoring performance under different working conditions.

[0029] During the operation of the cyclone 5, after centrifugal separation, according to the properties of the material, the design of the cyclone and the different operating conditions, the underflow flowing out of the underflow port 51 is in the form of umbrella flow or columnar flow, the umbrella flow usually shows that the underflow forms a diffusion area similar to an umbrella when flowing out, and the columnar flow shows that the underflow flows out in the form of a relatively concentrated column, both of which have a certain cross-sectional area. Specifically, when the underflow flows out in the form of umbrella flow, the occupied area monitored by the sensor may be relatively large, and when the underflow flows out in the form of columnar flow, the occupied area monitored by the sensor may be relatively small and relatively stable. By limiting the spatial range monitored by the sensor 1, the different states of the underflow and the difference of the occupied area of the underflow per period can be obtained, so as to determine the change of the underflow state.

[0030] In some preferred embodiments of the present application, the sensor 1 is arranged in a pair of emitter and receiver, which are installed in two separate sensors 1 respectively, and horizontally face the two sides of the underflow outlet 51 respectively, and the connection line between the emitter and the receiver intersects with the direction of underflow discharge. The monitoring principle of the pair of emitter and receiver is that the emitter emits a beam of light, which propagates linearly along a certain path to the receiver, and the receiver converts the light into an electrical signal or other form of output signal after receiving the light.

[0031] In some preferred embodiments of the present application, the sensor 1 is arranged in a pair of emitter and receiver, which are installed in two separate sensors 1 respectively, and horizontally face the two sides of the underflow outlet 51 respectively, and the connection line between the emitter and the receiver intersects with the direction of underflow discharge. The monitoring principle of the pair of emitter and receiver is that the emitter emits a beam of light, which propagates linearly along a certain path to the receiver, and the receiver converts the light into an electrical signal or other form of output signal after receiving the light.

[0032] When the underflow is in a normal state, the underflow blocks the light, resulting in that the receiver cannot receive the light signal. When the underflow is blocked, the underflow flow is hindered, which can cause changes in the cross-sectional area of the underflow or slow down the flow speed, and these factors can change the reflection characteristics of the light signal in the underflow area, such as weakening of the signal intensity, change of the frequency, etc. The receiver receives the light and converts it into an output signal, which triggers a response mechanism. The response mechanism is that when the underflow is blocked, the system automatically sends a warning signal, so that the operator can handle the abnormal operation of the cyclone in time and prevent production accidents.

[0033] At the same time, since the underflow forms include umbrella flow and columnar flow, the spatial coverage of the umbrella flow is different due to the design or operating conditions of the cyclone when the underflow is discharged. The sensor 1 can determine the change of the underflow state by the difference in the occupied area.

[0034] Further, a slide rail 2 is installed on the inner wall of the sand pool, and the sensor 1 is slidably installed on the slide rail 2. The slide rail 2 can adjust the position of the sensor 1 in the horizontal direction to adapt to the change of the underflow in different operating states, thereby improving the flexibility and accuracy of the underflow state monitoring. In some preferred embodiments of the present application, as shown in Figure 2As shown, the sensor 1 is provided with a base, a connecting shaft and a mounting table, the connecting shaft is fixedly installed between the base and the mounting table, the mounting table is provided with the sensor 1, and the sensor 1 is slidably installed on the slide rail 2 through the connecting shaft.

[0035] Further, as shown in Figure 3 and Figure 4 The protection cover 3 is fixedly installed on the sensor 1, the sensor 1 is located on the axis of the protection cover 3, the protection cover 3 is a sleeve structure with hollow inside and inverted U-shaped cross section along the radial direction, so that the sensor 1 is not exposed to the underflow. In the process of underflow discharge, there is a risk that pollutants or underflow splashes on the sensor 1, which will adversely affect the monitoring function of the sensor 1, and the splashed pollutants or underflow attached to the sensor 1 will cause the light signal to be unable to normally emit or receive, and also cause mechanical damage, thereby affecting its stability and service life.

[0036] Further, the deflector plate 4 is fixedly installed on the sensor 1, the deflector plate 4 is a folded plate structure arranged obliquely downward, preferably, the oblique angle is 5° for best effect, at the same time, the cross section of the deflector plate 4 in the vertical direction is parabolic and its apex is located on the center line of the sensor 1, the deflector plate has a flow guiding function and can guide the liquid to be discharged. The protection cover 3 and the deflector plate 4 are cooperatively arranged around the sensor 1 to form a relatively narrow avoidance space, which can effectively prevent pollutants or underflow from splashing on the sensor 1 and provide a safer and more stable working environment for it.

[0037] The above detailed the specific embodiments of the present application, for those skilled in the art, without departing from the principles of the present application, can make some improvements and modifications to the present application, these improvements and modifications also belong to the protection scope of the present application claims.

Claims

1. A bottom flow monitoring system for monitoring the bottom flow state of a cyclone, comprising a cyclone (5), characterized in that: a bottom flow port (51) of the cyclone (5) is arranged at the inlet of a sand pool (6), and the bottom flow after centrifugal separation is discharged from the bottom flow port (51) to the sand pool (6); and further comprising at least one set of sensors (1), the at least one set of sensors (1) being arranged below the bottom flow port (51) and located in the dense area of the bottom flow discharged from the bottom flow port (51), and used for detecting the shape of the bottom flow.

2. The bottom flow monitoring system of claim 1, characterized in that: the extension line of the center line of the bottom flow port (51) and the center line of the bottom flow port (51) intersect, and the included angle formed is 10°-15°.

3. The bottom flow monitoring system of claim 1, characterized in that: the sensors (1) are arranged in a pair of shooting mode, the sensors (1) comprise a transmitter and a receiver, the transmitter and the receiver are respectively installed in two separate sensors (1), the transmitter and the receiver are both horizontally arranged on both sides of the bottom flow port (51), and the connecting line between the transmitter and the receiver intersects the direction of the bottom flow discharge.

4. The bottom flow monitoring system of claim 1, characterized in that: the sensors (1) are arranged in a reflection mode, the sensors (1) comprise a transmitter and a receiver, the transmitter and the receiver are installed in the same sensor (1), the sensor (1) is arranged on one side of the bottom flow port (51), and a reflector is arranged on the other side corresponding to the sensor (1), and the connecting line between the sensor (1) and the reflector intersects the direction of the bottom flow discharge.

5. The bottom flow monitoring system of claim 1, characterized in that: further comprising a slide rail (2) fixedly installed on the inner wall of the sand pool (6), and the sensor (1) is slidably installed on the slide rail (2).

6. The bottom flow monitoring system of claim 1, characterized in that: further comprising a protective cover (3) fixedly installed on the sensor (1), the sensor (1) is located on the axis of the protective cover (3), the protective cover (3) is a sleeve structure with a hollow inside and a reverse U-shaped cross section along the radial direction, so that the sensor (1) is not exposed to the bottom flow.

7. The bottom flow monitoring system of claim 1, characterized in that: further comprising a flow guide plate (4) fixedly installed on the sensor (1), the flow guide plate (4) is an inclined downward folded plate structure, the cross section of the flow guide plate (4) along the vertical direction is parabolic, and the apex of the flow guide plate (4) is located on the center line of the sensor (1). ​ ​ ​ ​ ​ ​ ​ ​

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