Coal blocking cleaning device and method for activated feeder

Abstract

The present invention relates to a coal blocking cleaning device and method for an activated feeder, which is installed on the activated feeder and includes an air sweeping nozzle and a radio frequency admittance detection device. The air sweeping nozzle is installed at the bin wall of the activated feeder, and the radio frequency admittance detection device is arranged at the front end of the air sweeping nozzle, and is used to detect whether the front end of the air sweeping nozzle contacts the material. When the contact with the material is detected, a coal blocking signal is generated; the air sweeping nozzle is started according to the coal blocking signal. Compared with the prior art, the present invention can quickly determine whether the activated feeder is blocked by coal, and directly clean the accumulated coal, which greatly shortens the troubleshooting time, improves the stability of equipment operation and the accuracy of the coal blocking position.

Description

Technical Field

[0001] The invention relates to the technical field of coal cleaning for activated feeders, and in particular to a device and method for cleaning coal blockage for activated feeders. Background Art

[0002] Taking the activated vibrating feeder as an example, during the discharging operation, the types of coal used in thermal power plants are relatively complex, especially Indonesian coal and lignite are mixed, the dust content is very high, and it is easy to adhere to the arc channel position on both sides of the feeder when the moisture content is high. For example, the invention disclosed in the publication number CN117023043A discloses a coal drop shaft blockage alarm and clearing system for a thermal power plant, comprising a main body, including an upper coal conveying component, a coal drop shaft arranged at the lower end of the upper coal conveying component, and a lower coal conveying component arranged at the lower end of the coal drop shaft; a coal flow detection component and a clearing component, comprising a rotating component arranged on the coal drop shaft, a stirring component arranged on the rotating component, and an impact component arranged on the stirring component.

[0003] As the coal flow channels of related equipment are too cramped, it is also very difficult to clean and poke coal on site. This situation has almost become the norm, posing a huge hidden danger to the safe production of power plants, and also causing huge work troubles for maintenance personnel and related professionals. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for cleaning coal blockages in an activated feeder in order to overcome the defects of the prior art that it is difficult to clean and poke coal in the activated feeder, which poses a great hidden danger to the safe production of the power plant.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A coal blockage cleaning device for an activated feeder is installed on the activated feeder, comprising an air sweeping nozzle and a radio frequency admittance detection device. The air sweeping nozzle is installed on the bin wall of the activated feeder, and the radio frequency admittance detection device is arranged at the front end of the air sweeping nozzle to detect whether the front end of the air sweeping nozzle contacts the material. When it is detected that the material is contacted, a coal blockage signal is generated; the air sweeping nozzle is started according to the coal blockage signal.

[0007] Furthermore, the air sweeping nozzle includes a high-pressure air source, a high-pressure hose, a solenoid valve, a one-way valve, a nozzle structure and a fixed seat. The nozzle structure is installed on the warehouse wall of the activated feeder through the fixed seat, and penetrates the warehouse wall and extends to the inner side of the warehouse wall. The high-pressure air source, high-pressure hose, solenoid valve, one-way valve and nozzle structure are connected in sequence.

[0008] Furthermore, the top of the nozzle structure extending toward the inner side of the warehouse wall is a 360° annular nozzle.

[0009] Furthermore, the nozzle structure is fixedly connected to the fixing seat by a clamp and a tightening external hexagon.

[0010] Furthermore, the CSL layer of the radio frequency admittance detection device is distributed in an area with a radius of 40-60 cm with the front end of the air sweep nozzle as the center, and is fixed on the silo wall surface of the activation feeder.

[0011] Furthermore, the coal blockage cleaning device also includes an electrical control circuit or a PLC control module, which is used to determine whether there is coal blockage according to the change of the output signal of the radio frequency admittance detection device, and generate a coal blockage signal and alarm content.

[0012] Furthermore, the number of the air sweeping nozzles and the radio frequency admittance detection devices are both multiple, and are arranged on both sides of the outlet side of the coal flow conveying channel of the activated feeder, and the radio frequency admittance detection devices and the coal blocking cleaning devices correspond one to one.

[0013] The present invention also provides a method for cleaning coal blockages based on the above-mentioned coal blockage cleaning device for an activated feeder, comprising the following steps:

[0014] The radio frequency admittance detection device is used to detect whether the front end of the air sweep nozzle contacts the material. If it is determined that it contacts the material, a coal blocking signal is generated to drive the corresponding air sweep nozzle to start clearing the blocked coal.

[0015] Furthermore, the method further comprises:

[0016] When the activated feeder is running, the activated feeder maintains lateral vibration and performs delayed processing on the generated coal blocking signal. When the coal blocking signal is continuously generated, the corresponding air sweeping nozzle is driven to start clearing the blocked coal.

[0017] Furthermore, the method is implemented through an electrical control loop or a PLC control module.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] (1) The present invention combines radio frequency admittance technology with an intelligent anti-blocking air sweeping system to form a coal blockage cleaning device. When the feeder is stationary, if the radio frequency admittance detection center contacts the material, it is determined that there is coal blockage inside the feeder. The signal is received by the radio frequency admittance transmitter and transmitted to the air sweeping system, which activates the nozzle to clean the coal blockage. In addition, compared with installing two systems separately, the new two-in-one coal blockage cleaning device has the goal of saving working area, easy disassembly, reducing installation workload, and accurately removing coal accumulated on the silo wall; the internal threaded channel formed by the air sweeping nozzle can also be used as an additional cleaning hole for activating the feeder, which is convenient for maintenance personnel to operate.

[0020] (2) The present invention applies radio frequency admittance technology to the method for judging coal blockage in activated coal feeder, and combines radio frequency admittance technology with air sweep nozzle to form a coal blockage cleaning device. When the feeder is stationary, if the hanging material layer of the radio frequency admittance detection device contacts the material, it is judged that the feeder is blocked by coal. The advantage of this judgment method is that the radio frequency admittance technology can be used to intuitively judge the coal blockage on the narrow outlet side of the coal flow conveying channel of the activated vibration feeder, and directly clean the accumulated coal.

[0021] (3) The present invention can quickly determine whether there is coal blockage on the narrow outlet side of the coal flow conveying channel of the activated vibrating feeder, and clearly identify the location of the coal blockage, thereby greatly shortening the troubleshooting time, improving the stability of equipment operation and the accuracy of the coal blockage location, and reducing the workload of maintenance personnel and overhaul personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the structure of an air-sweeping nozzle provided in an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of the working state of an air sweep nozzle provided in an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the position of an internal threaded channel of an air sweep nozzle provided in an embodiment of the present invention;

[0025] Figure 4 A schematic flow chart of a method for cleaning a coal blockage of a coal blockage cleaning device for an activated feeder provided in an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the installation position of a coal blocking cleaning device for an activated feeder provided in an embodiment of the present invention;

[0027] Figure 6 It is a schematic diagram of the working state of a coal blocking cleaning device for an activated feeder provided in an embodiment of the present invention;

[0028] In the figure, 1. activated feeder, 2. air sweep nozzle, 201. high pressure hose, 202. solenoid valve, 203. one-way valve, 204. nozzle structure, 205. fixing seat, 206. clamp, 207. tightening external hexagon, 3. radio frequency admittance detection device. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0033] Example 1

[0034] like Figure 5 and Figure 6 As shown, this embodiment provides a coal blockage cleaning device for an activated feeder, which is installed on the activated feeder 1 and includes an air sweeping nozzle 2 and a radio frequency admittance detection device 3. The air sweeping nozzle 2 is installed on the bin wall of the activated feeder 1, and the radio frequency admittance detection device 3 is arranged at the front end of the air sweeping nozzle 2 to detect whether the front end of the air sweeping nozzle 2 contacts the material. When it is detected that the material is contacted, a coal blockage signal is generated; the air sweeping nozzle 2 is started according to the coal blockage signal.

[0035] Preferably, Figure 1 and Figure 2 As shown, the air sweeping nozzle 2 includes a high-pressure gas source, a high-pressure hose 201, a solenoid valve 202, a one-way valve 203, a nozzle structure 204 and a fixed seat 205. The nozzle structure 204 is installed on the warehouse wall of the activation feeder 1 through the fixed seat 205, and penetrates the warehouse wall and extends to the inner side of the warehouse wall. The high-pressure gas source, the high-pressure hose 201, the solenoid valve 202, the one-way valve 203 and the nozzle structure 204 are connected in sequence.

[0036] Preferably, the top of the nozzle structure 204 extending toward the inner side of the bin wall is a 360° annular nozzle, thereby achieving powerful 360° annular blowing.

[0037] Preferably, the nozzle structure 204 is fixedly connected to the fixing seat 205 by means of a clamp 206 and a fastening outer hexagon 207 to ensure the stability of the fixation.

[0038] The air-sweeping nozzle 2 of the present scheme utilizes pulsed high-pressure gas (pressure 0.6Mpa-0.7Mpa) to perform a strong 360° circular sweep on the material in the hopper through the air-sweeping fluidizing nozzle, thereby forming a destructive flow surface from point to surface. The instantaneous explosion prevents the material from sticking to the silo wall and simultaneously releases the bonding balance force of the material, thereby ultimately achieving the effect of preventing blockage. In the present embodiment, the air-sweeping nozzle 2 is mainly composed of a stainless steel impact head, a solenoid valve, an intelligent control system, high-pressure gas, a circulation pipeline, a line, etc.

[0039] In addition, if Figure 3 As shown in the figure, the internal threaded channel formed by the air sweep nozzle can also be used as an additional cleaning hole for the activated feeder, making it easier for maintenance personnel to operate.

[0040] The radio frequency admittance detection device 3 performs detection based on radio frequency admittance technology. Radio frequency admittance technology is to lead out a wire on the circuit unit measurement signal, amplify it through a common-phase amplifier, and connect its output to the coaxial cable shielding layer, and then connect it to the shielding layer of the probe (Cote-shield element). The amplifier is a common-phase amplifier with a gain of "1". The output signal is equipotential, in phase, and at the same frequency as the input signal, but isolated from each other. The ground wire is another independent conductor in the cable. Due to the above-mentioned relationship between the center line of the coaxial cable and the outer shield, there is no potential difference between the two, and no current flows, that is, no current leaks from the center line, which is equivalent to no capacitance between the two or the capacitance is equal to zero. Therefore, the temperature effect of the cable, the installation capacitance, etc. will not have an impact.

[0041] Preferably, the CSL layer (public service layer) of the radio frequency admittance detection device 3 is distributed in an area with a radius of 40-60 cm with the front end of the air sweep nozzle 2 as the center, and is fixed on the silo wall surface of the activation feeder 1.

[0042] In this embodiment, the CSL layer in the radio frequency admittance technology is set with the center of the air sweep nozzle as the center of the circle and a radius of 50 cm;

[0043] Preferably, the coal blockage cleaning device also includes an electrical control circuit or a PLC control module, which is used to determine whether there is coal blockage according to the change of the output signal of the radio frequency admittance detection device 3, and generate a coal blockage signal and alarm content.

[0044] Preferably, there are multiple air-sweeping nozzles 2 and radio frequency admittance detection devices 3, which are arranged on both sides of the outlet side of the coal flow conveying channel of the activated feeder 1, and the radio frequency admittance detection devices 3 and the coal blockage cleaning devices correspond one to one; in this embodiment, two air-sweeping nozzles 2 and radio frequency admittance detection devices 3 are arranged on both sides of the outlet side of the coal flow conveying channel of the activated feeder 1.

[0045] like Figure 4 As shown, this embodiment also provides a method for cleaning coal blockages based on the above-mentioned coal blockage cleaning device for activating a feeder, comprising the following steps:

[0046] Install radio frequency admittance detection device and air sweep nozzle;

[0047] The radio frequency admittance detection device 3 detects whether the front end of the air sweep nozzle 2 contacts the material. If it is determined that it contacts the material, a coal blocking signal is generated to drive the corresponding air sweep nozzle 2 to start cleaning the blocked coal.

[0048] In this embodiment, Figure 1 and Figure 5 As shown, firstly, air sweep nozzles are installed on both sides of the narrow outlet side of the coal flow conveying channel of the activated vibrating feeder; the CSL layer in the radio frequency admittance technology is set with the center of the air sweep nozzle as the center of the circle and a radius of 50cm;

[0049] like Figure 2 and Figure 6 As shown, when the activated vibrating feeder is in a stationary state, the material information on the narrow outlet side of the coal flow conveying channel of the activated vibrating feeder can be obtained by detecting whether the material layer, that is, the front end of the air sweep nozzle, of the hanging material layer of the radio frequency admittance detection device contacts the material. If it contacts, a coal blocking signal is generated, and the corresponding air sweep nozzle can be activated to clear the coal blocking. The advantage of this judgment method is that the radio frequency admittance technology can be used to intuitively judge the coal blocking situation on the narrow outlet side of the coal flow conveying channel of the activated vibrating feeder, and directly clear the accumulated coal.

[0050] It is equivalent to installing a radio frequency admittance detection device on the narrow outlet side of the coal flow conveying channel of the activated vibrating feeder, that is, the front end of the air sweep nozzle contacts the material and obtains a signal, and the signal is connected to the electrical control circuit or the PLC control module, so as to judge whether the narrow outlet side of the coal flow conveying channel of the activated vibrating feeder is blocked by coal through the change of the signal and clarify the alarm content.

[0051] Specifically, when there is no coal blocking inside the feeder, there is no material on the wall of the feeder hopper, and the material hanging layer of the radio frequency admittance detection device, that is, the front end of the air sweep nozzle cannot contact the material, the built-in sensor does not send a signal, and there is no coal blocking fault on the narrow outlet side of the coal flow conveying channel of the activated vibration feeder;

[0052] When the feeder is blocked by coal, the blocked coal sample will condense on the wall of the feeder hopper. When the hanging layer of the radio frequency admittance detection device, that is, the front end of the air sweep nozzle, contacts the material, the built-in sensor will send a signal. After receiving the signal, the control system will activate the coal blockage fault on the narrow outlet side of the coal flow conveying channel of the vibration feeder.

[0053] Preferably, the method further comprises:

[0054] When the activated feeder 1 is running, the activated feeder 1 maintains lateral vibration, and performs delayed processing on the generated coal blocking signal. When the coal blocking signal is continuously generated, the corresponding air sweeping nozzle 2 is driven to start clearing the blocked coal.

[0055] That is, when the activated feeder is running, i.e. discharging materials, the activated feeder continues to vibrate horizontally, and there is continuous contact between the nozzle and the CLS layer (bin wall). Therefore, the coal blocking signal of the wall should be delayed to avoid false operation.

[0056] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A coal blockage cleaning device for an activated feeder, installed on an activated feeder (1), characterized in that: The invention comprises an air-sweeping nozzle (2) and a radio frequency admittance detection device (3), wherein the air-sweeping nozzle (2) is installed at the bin wall of an activated feeder (1), and the radio frequency admittance detection device (3) is arranged at the front end of the air-sweeping nozzle (2) and is used to detect whether the front end of the air-sweeping nozzle (2) contacts with materials, and generates a coal blocking signal when contact with materials is detected; the air-sweeping nozzle (2) is activated according to the coal blocking signal.

2. The coal blocking cleaning device for an activated feeder according to claim 1, characterized in that: The air sweeping nozzle (2) comprises a high-pressure gas source, a high-pressure hose (201), an electromagnetic valve (202), a one-way valve (203), a nozzle structure (204) and a fixing seat (205); the nozzle structure (204) is installed on the warehouse wall of the activation feeder (1) through the fixing seat (205), and penetrates the warehouse wall and extends to the inner side of the warehouse wall; the high-pressure gas source, the high-pressure hose (201), the electromagnetic valve (202), the one-way valve (203) and the nozzle structure (204) are connected in sequence.

3. The coal blocking cleaning device for an activated feeder according to claim 2, characterized in that: The top of the nozzle structure (204) extending toward the inner side of the warehouse wall is a 360° annular nozzle.

4. The coal blocking cleaning device for an activated feeder according to claim 2, characterized in that: The nozzle structure (204) is fixedly connected to the fixing seat (205) via a clamp (206) and a tightening outer hexagon (207).

5. The coal blocking cleaning device for an activated feeder according to claim 1, characterized in that: The CSL layer of the radio frequency admittance detection device (3) is distributed in an area with a radius of 40-60 cm with the front end of the air sweep nozzle (2) as the center, and is fixed on the silo wall surface of the activated feeder (1).

6. The coal blocking cleaning device for an activated feeder according to claim 1, characterized in that: The coal blockage cleaning device also includes an electrical control circuit or a PLC control module, which is used to determine whether there is coal blockage according to the change of the output signal of the radio frequency admittance detection device (3) and generate a coal blockage signal and alarm content.

7. The coal blocking cleaning device for an activated feeder according to claim 1, characterized in that: The air sweep nozzles (2) and the radio frequency admittance detection devices (3) are both in multiple numbers and are arranged on both sides of the outlet side of the coal flow conveying channel of the activated feeder (1), and the radio frequency admittance detection devices (3) correspond to the coal blocking cleaning devices one by one.

8. A method for cleaning coal blockages based on a coal blockage cleaning device for an activated feeder according to any one of claims 1 to 7, characterized in that: The following steps are involved: A radio frequency admittance detection device (3) is used to detect whether the front end of the air sweep nozzle (2) contacts the material. If it is determined that the material is contacted, a coal blocking signal is generated to drive the corresponding air sweep nozzle (2) to start cleaning the blocked coal.

9. The method according to claim 8, characterized in that The method further comprises: When the activated feeder (1) is running, the activated feeder (1) maintains lateral vibration, performs delayed processing on the generated coal blocking signal, and when the coal blocking signal is continuously generated, drives the corresponding air sweeping nozzle (2) to start clearing the blocked coal.

10. The method according to claim 8, characterized in that The method is implemented through an electrical control loop or a PLC control module.

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