A device for simultaneously measuring the velocity and concentration of a wind-blown powder

Abstract

The utility model relates to a kind of wind powder speed and concentration simultaneously online measuring device, to solve the technical problem that current monitoring probe is not convenient to disassemble and maintain, disassembly can affect the normal work of pulverizing system, including installation cylinder and conveying pipeline, the inside of the conveying pipeline is fixedly connected in the installation cylinder, the inside of the installation cylinder is slidably connected with installation round plate, the top middle of the installation round plate is fixedly connected with monitoring probe, the inside of the installation cylinder is provided with jack, the inside of the installation cylinder is equipped with baffle;The inside of the installation round plate is rotatably connected with rotating rod on both sides, the bottom of the rotating rod is fixedly connected with fixed clamping plate, the utility model has when disassembling monitoring probe, does not need to close pulverizing system, guarantee the normal operation of pulverizing system, to ensure the normal operation of power generation, monitoring probe can be conveniently and quickly disassembled and assembled, to facilitate subsequent maintenance and replacement.

Description

Technical Field

[0001] This utility model relates to the field of air-powder measurement technology, specifically to a device for simultaneously online measuring air-powder velocity and concentration. Background Technology

[0002] In power plant boiler power generation, "air-coal mixture" refers to the airflow of pulverized coal in the boiler, which is a mixture of air and pulverized coal. During production, the pulverizing system sends the air-coal mixture into the boiler through pipelines for combustion. Specialized measuring devices can monitor various parameters in real time, thereby effectively promoting the development of boiler combustion optimization systems and providing reliable measurement methods and basis for reducing pollutant emissions and improving boiler combustion efficiency.

[0003] In existing methods of measuring air-coal mixture, a monitoring probe is typically installed by drilling a hole in the conveying pipeline connecting the pulverizing system and the boiler. The velocity and concentration of air-coal mixture are measured online using the principle of alternating current charge induction. However, the traditional installation method of the monitoring probe is not convenient for disassembly and maintenance. In order to ensure safety, the pulverizing system must be shut down when the monitoring probe needs to be replaced or maintained. However, since the boilers in power plants usually operate continuously, shutting down the pulverizing system not only affects the normal operation of the pulverizing system but also affects the combustion of the boiler, thereby affecting power generation.

[0004] For example, when a monitoring probe is damaged and needs to be replaced, since the monitoring probe is installed on the pipe connecting the pulverizing system to the boiler, the pulverizing system needs to be temporarily shut down to ensure operational safety. As we all know, the power grid's demand for electricity is continuous. In order to ensure a stable power supply, the power plant boiler needs to operate continuously for a long time to continuously generate high-temperature and high-pressure steam, drive the turbine to rotate, and then drive the generator to generate electricity. Therefore, once the pulverizing system is stopped, it will inevitably affect the boiler's combustion efficiency and thus affect the power generation. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology, adapt to practical needs, and provide a device for simultaneously measuring the air-powder speed and concentration online, so as to solve the technical problem that the current monitoring probe is inconvenient to disassemble and maintain, and disassembly will affect the normal operation of the powder making system.

[0006] To achieve the purpose of this utility model, the technical solution adopted by this utility model is as follows: design a device for simultaneous online measurement of air powder speed and concentration, including an installation cylinder and a conveying pipe. The installation cylinder is fixedly connected inside the conveying pipe. An installation circular plate is slidably connected inside the installation cylinder. A monitoring probe is fixedly connected to the top center of the installation circular plate. An insertion hole is opened inside the installation cylinder. A baffle plate is provided inside the installation cylinder.

[0007] Rotating rods are rotatably connected to both sides of the inner side of the mounting circular plate, and a fixing plate is fixedly connected to the bottom end of the rotating rods.

[0008] In this solution, when disassembling the monitoring probe, the insertion hole is blocked and sealed by a baffle plate. This allows the pulverizing system to be installed and removed without shutting down the system, ensuring its normal operation and thus the normal operation of power generation. The rotating rod, in conjunction with the fixing plate, enables quick and easy installation and removal of the monitoring probe, facilitating subsequent maintenance and replacement.

[0009] Preferably, the top of the mounting cylinder extends to the outside of the conveying pipe, the interior of the mounting cylinder has a sliding cavity, and the sliding cavity is connected to the insertion hole. The monitoring end of the monitoring probe extends through the mounting plate, the sliding cavity, and the insertion hole sequentially into the interior of the conveying pipe, and the monitoring probe is slidably connected to the insertion hole. The barrier plate is slidably connected to the sliding cavity. An operating plate is fixedly connected to the outside of the barrier plate. The other end of the operating plate extends to the outside of the mounting cylinder, and the operating plate is slidably connected to the mounting cylinder. A hollow block is slidably connected to the outside of the operating plate, and the hollow block is fixedly connected to the outside of the mounting cylinder. Fixing holes are opened on both sides of the top of the operating plate. A fixing screw is screwed onto the top of the hollow block, and the fixing screw is screwed into the fixing hole.

[0010] In practical applications, the control panel, along with hollow blocks, fixing holes, and fixing screws, facilitates the fixation of the barrier plate, ensuring the stability of the seal. This allows the monitoring probe to be replaced without affecting the normal operation of the pulverizing system.

[0011] Preferably, a sealing rubber layer is provided on the outer side of the mounting plate, the inside of the insertion hole, and the outer side of the barrier plate.

[0012] In practical applications, the sealing rubber layer improves the sealing performance to prevent air and powder leakage from the conveying pipeline, ensuring that air and powder will not leak out during use, while also facilitating the disassembly and assembly of the monitoring probe.

[0013] Preferably, the mounting cylinder has mounting slots on both sides inside, the fixing plate engages with the mounting slots, and the top of the rotating rod has a rotating knob.

[0014] In practical applications, by setting up mounting slots and fixing plates, the mounting disc can be quickly installed, which facilitates the installation and removal of the monitoring probe.

[0015] Preferably, a sliding rod is slidably connected inside the mounting circular plate, the bottom end of the sliding rod is fixedly connected to the inside of the mounting cylinder, and the top end of the sliding rod extends to the outside of the mounting cylinder and is screwed with a positioning block.

[0016] In practical applications, the sliding rod is used to limit the installation of the circular plate, making it easy to position it during installation. At the same time, the sliding rod, together with the positioning block, positions the installation circular plate at a specified height when the monitoring probe is disassembled, thus facilitating subsequent operations.

[0017] Preferably, dustproof protective nets are placed on both sides of the top of the mounting cylinder, and a handle is provided on the top of the mounting plate.

[0018] In practical applications, the monitoring probe is protected from dust by a dustproof net, and the circular plate is easy to operate and install with a handle.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. This utility model uses a barrier plate to block and seal the insertion hole, preventing the leakage of air and powder from the conveying pipeline. Therefore, when disassembling and assembling the monitoring probe, it is not necessary to shut down the pulverizing system to ensure its normal operation. The barrier plate is easily fixed by the operation panel, hollow block, fixing hole and fixing screw, ensuring the stability of the seal. Through the above combination, it is possible to disassemble and assemble the monitoring probe without shutting down the pulverizing system, ensuring the normal operation of the pulverizing system, thereby ensuring the normal operation of power generation.

[0021] 2. This utility model uses a rotating rod and a fixed plate to install a mounting slot, which facilitates quick assembly and disassembly of the mounting plate, thereby facilitating the installation and disassembly of the monitoring probe. A sliding rod and a positioning block limit the mounting plate for easy positioning during installation. Simultaneously, the sliding rod and positioning block position the mounting plate at a specified height when disassembling the monitoring probe, facilitating subsequent operations. Through this combination, the monitoring probe can be quickly and easily assembled and disassembled, thus facilitating subsequent maintenance and replacement. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0023] Figure 2 This is a schematic cross-sectional view of the overall structure of this utility model;

[0024] Figure 3 This is a cross-sectional view of the mounting cylinder structure of this utility model;

[0025] Figure 4 This is a schematic diagram of the positioning block structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the barrier plate structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the fixing plate structure of this utility model;

[0028] Figure 7 For the present utility model Figure 2 A magnified view of A in the middle.

[0029] In the diagram: 100, mounting cylinder; 110, mounting plate; 111, monitoring probe; 112, insertion hole; 113, barrier plate; 120, rotating rod; 121, fixing plate; 130, sliding cavity; 131, operating panel; 132, hollow block; 133, fixing hole; 134, fixing screw; 140, mounting slot; 150, slide rod; 151, positioning block; 200, conveying pipe. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0031] Example 1: A device for simultaneous online measurement of airflow velocity and concentration, see [link to example]. Figures 1 to 7 The system includes an installation cylinder 100 and a conveying pipe 200. The installation cylinder 100 is fixedly connected inside the conveying pipe 200. An installation plate 110 is slidably connected inside the installation cylinder 100. A monitoring probe 111 is fixedly connected to the top center of the installation plate 110. An insertion hole 112 is opened inside the installation cylinder 100. A baffle plate 113 is provided inside the installation cylinder 100. The top of the installation cylinder 100 extends to the outside of the conveying pipe 200. A sliding cavity 130 is opened inside the installation cylinder 100 and is connected to the insertion hole 112. The monitoring end of the monitoring probe 111 passes through the installation plate 110, the sliding cavity 130, and the insertion hole in sequence. 112 extends into the interior of the conveying pipe 200, and the monitoring probe 111 is slidably connected to the socket 112. The baffle plate 113 is slidably connected to the sliding cavity 130. An operating plate 131 is fixedly connected to the outside of the baffle plate 113. The other end of the operating plate 131 extends to the outside of the mounting cylinder 100, and the operating plate 131 is slidably connected to the mounting cylinder 100. A hollow block 132 is slidably connected to the outside of the operating plate 131. The hollow block 132 is fixedly connected to the outside of the mounting cylinder 100. Fixing holes 133 are opened on both sides of the top of the operating plate 131. A fixing screw 134 is screwed onto the top of the hollow block 132, and the fixing screw 134 is screwed into the fixing hole 133.

[0032] When measuring the velocity and concentration of powder within the conveying pipeline 200, the monitoring probe 111 is positioned in the powder flow field via the sensing electrode. The powder particles are charged and generate an AC charge signal when they approach the sensing electrode. The faster the velocity, the higher the signal frequency. The probe circuit obtains the frequency through spectrum analysis and converts it into powder velocity according to the calibration relationship. The powder flow rate is then measured and monitored. The higher the powder concentration, the greater the amplitude of the AC charge signal on the sensing electrode. A concentration calibration curve is plotted through experiments. During actual measurement, the curve is compared, and the powder concentration is calculated from the signal amplitude. The measured powder concentration is then measured and monitored, and the data is transmitted to the terminal for monitoring.

[0033] When maintenance or replacement of the monitoring probe 111 is required, rotate the fixing screw 134 to release the fixation of the operation plate 131, then release the fixation of the mounting plate 110, lift the mounting plate 110 upwards, and the upward movement of the mounting plate 110 will move the monitoring probe 111 upwards, pulling the monitoring end of the monitoring probe 111 out of the delivery pipe 200. After the monitoring probe 111 is pulled out a certain distance, it touches the positioning block 151 and stops under the action of the positioning block 151, leaving the monitoring end of the monitoring probe 111 in the socket 112 for a certain distance to seal the socket 112 and prevent air dust leakage. At this time, push the operation plate 131, and the operation plate 131 will move the barrier plate 1. 13 slides in the sliding cavity 130 to block the socket 112. Then, rotate the fixing screw 134 to fix the baffle plate 113 through the current fixing hole 133. At this time, the remaining part of the monitoring probe 111 can be completely pulled out to complete the removal of the monitoring probe 111. At the same time, the pulverizing system operates normally by conveying air and pulverizing to the boiler through the conveying pipe 200 to ensure normal power generation. During installation, after inserting the monitoring probe 111 into the socket 112, release the fixation of the baffle plate 113 and pull the baffle plate 113 outward to release the seal on the socket 112. At this time, the monitoring end of the monitoring probe 111 can be completely inserted into the conveying pipe 200.

[0034] For example, in the traditional process of disassembling and assembling the monitoring probe 111, the pulverizing system needs to be temporarily shut down to ensure operational safety, which would affect normal power generation. This application uses a baffle plate 113 to block and seal the insertion hole 112, preventing the leakage of air and powder from the conveying pipeline 200. Thus, when disassembling and assembling the monitoring probe 111, it is not necessary to shut down the pulverizing system to ensure its normal operation. The baffle plate 113 is easily fixed by the operating plate 131 in conjunction with the hollow block 132, the fixing hole 133, and the fixing screw 134, ensuring the stability of the seal. Therefore, when disassembling and assembling the monitoring probe 111, it is not necessary to shut down the pulverizing system, ensuring the normal operation of the pulverizing system and thus ensuring the normal operation of power generation.

[0035] For details, see Figure 1 , Figure 2 and Figure 7 A sealing rubber layer is provided on the outer side of the mounting plate 110, the inside of the socket 112, and the outer side of the barrier plate 113. The sealing rubber layer is used to improve the sealing of each connection, ensure that the air powder will not leak out during use, and facilitate the disassembly and assembly of the monitoring probe 111.

[0036] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 The inner sides of the mounting circular plate 110 are rotatably connected to rotating rods 120. The bottom end of the rotating rods 120 is fixedly connected to a fixing plate 121. The inner sides of the mounting cylinder 100 are provided with mounting slots 140. The fixing plate 121 is engaged with the mounting slots 140. The top of the rotating rods 120 is provided with a rotating knob. The inner side of the mounting circular plate 110 is slidably connected to a sliding rod 150. The bottom end of the sliding rod 150 is fixedly connected to the inner side of the mounting cylinder 100. The top end of the sliding rod 150 extends to the outer side of the mounting cylinder 100 and is screwed with a positioning block 151.

[0037] When removing the monitoring probe 111, press down firmly on the mounting plate 110 to cause elastic deformation of the sealing rubber layer on the mounting plate 110, thereby creating a gap between the fixing plate 121 and the mounting slot 140. Simultaneously, grasp the rotating knobs on both sides and rotate them to drive the rotating rod 120 to rotate. The rotation of the rotating rod 120 drives the fixing plate 121 to rotate, causing the fixing plate 121 to rotate from the horizontal direction to the vertical direction, matching the outlet of the mounting slot 140. Then release the pressure and lift the mounting plate 110 upwards using the handle on it. The mounting plate 110 slides upwards on the slide rod 150. When it aligns with the fixed... When the positioning block 151 contacts, the insertion hole 112 is blocked by the barrier plate 113. After that, rotate the positioning block 151 to remove it. Then the mounting plate 110 can be removed, and the monitoring probe 111 can be removed. During installation, slide the mounting plate 110 onto the slide rod 150 and slide it downwards so that the fixing plate 121 enters the mounting slot 140. Repeat the above pressing operation, then rotate the fixing plate 121 to the horizontal position and release the press. At this time, the sealing rubber layer on the mounting plate 110 deforms and rebounds. The elasticity cooperates with the fixing plate 121 to tighten the mounting plate 110. Then the positioning block 151 can be installed.

[0038] For example, traditionally, removing the monitoring probe 111 from the conveying pipe 200 requires specialized tools, which is cumbersome and inefficient, further extending the downtime of the pulverizing system. This invention utilizes a rotating rod 120 and a fixed clamping plate 121 in conjunction with a mounting slot 140 to facilitate quick assembly and disassembly of the mounting plate 110, thus simplifying the installation and disassembly of the monitoring probe 111. A sliding rod 150, in conjunction with a positioning block 151, limits the mounting plate 110 for easy positioning during installation. Simultaneously, the sliding rod 150, in conjunction with the positioning block 151, positions the mounting plate 110 to a specified height when disassembling the monitoring probe 111, facilitating subsequent operations and enabling quick assembly and disassembly of the monitoring probe 111.

[0039] For details, see Figures 1-3 Dustproof protective nets are placed on both sides of the top of the mounting cylinder 100, and a handle is provided on the top of the mounting plate 110. The dustproof protective nets protect the monitoring probe 111 from dust, and the handle makes it easy to operate the mounting plate 110.

[0040] It should be noted that the pulverizing system mentioned in this application is existing technology and is a commonly used method in air-coal conveying. In this application, the conveying pipeline 200 is connected to the pulverizing system at one end and to the boiler at the other end. Specifically, the pulverizing system is used as follows: raw coal is sent to the raw coal bunker by a belt conveyor, and the coal feeder feeds the raw coal evenly into the coal mill according to the boiler load requirements. The raw coal is ground into coal powder in the coal mill and dried using hot air provided by the air preheater. The dried coal powder is mixed with the hot air to form an air-coal mixture. After the air-coal mixture comes out of the coal mill, it enters the coarse powder separator. The separated coarse coal powder is returned to the coal mill, and the qualified fine coal powder enters the fine powder separator. In the fine powder separator, the coal powder is separated from the air, and the coal powder is sent to the boiler for combustion through the coal feeding pipeline by the coal feeder.

[0041] The monitoring probe 111 and the terminal mentioned in this application are both existing technologies. More specifically, after the monitoring probe 111 measures data through its internal sensing electrodes, the signal conditioning module performs preliminary processing on the raw AC charge signal acquired by the sensing electrodes. Then, the analog-to-digital conversion module converts the conditioned analog signal into a digital signal. Next, the microprocessor module further processes and analyzes the digital signal. Finally, the data is transmitted to the terminal through the communication module. The terminal receives the data transmitted from the monitoring probe 111 through the receiving module. The data acquisition module converts the data into a digital format that can be processed by a computer. The signal processing module further processes the acquired data. The data analysis module performs calculations and analysis based on the measurement principle and the pre-established model. Finally, the display module presents the results of the analysis in an intuitive way, so as to simultaneously measure the speed and concentration of the air-powder online.

[0042] In addition, all components designed in this utility model are general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods. Those skilled in the art can fully implement them, so there is no need to elaborate. The content protected by this utility model does not involve improvements to the internal structure and method.

[0043] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A device for simultaneously measuring air-powder velocity and concentration online, comprising an installation cylinder (100) and a conveying pipe (200), characterized in that, The mounting cylinder (100) is fixedly connected inside the conveying pipe (200). A mounting plate (110) is slidably connected inside the mounting cylinder (100). A monitoring probe (111) is fixedly connected at the top center of the mounting plate (110). An insertion hole (112) is opened inside the mounting cylinder (100). A baffle plate (113) is provided inside the mounting cylinder (100). Rotating rods (120) are rotatably connected to both sides of the inner side of the mounting circular plate (110), and a fixing plate (121) is fixedly connected to the bottom end of the rotating rods (120).

2. The device for simultaneously measuring airflow velocity and concentration online as described in claim 1, characterized in that, The top of the mounting cylinder (100) extends to the outside of the conveying pipe (200). A sliding cavity (130) is formed inside the mounting cylinder (100), and the sliding cavity (130) is connected to the insertion hole (112). The monitoring end of the monitoring probe (111) extends through the mounting cylinder (110), the sliding cavity (130), and the insertion hole (112) sequentially into the interior of the conveying pipe (200). The monitoring probe (111) is slidably connected to the insertion hole (112). The barrier plate (113) is slidably connected to the sliding cavity (130). An operating plate (131) is fixedly connected to the outside of the mounting cylinder (100). The other end of the operating plate (131) extends to the outside of the mounting cylinder (100), and the operating plate (131) is slidably connected to the mounting cylinder (100). A hollow block (132) is slidably connected to the outside of the operating plate (131), and the hollow block (132) is fixedly connected to the outside of the mounting cylinder (100). Fixing holes (133) are opened on both sides of the top of the operating plate (131), and a fixing screw (134) is screwed to the top of the hollow block (132), and the fixing screw (134) is screwed to the fixing hole (133).

3. The device for simultaneously measuring airflow velocity and concentration online as described in claim 1, characterized in that, A sealing rubber layer is provided on the outer side of the mounting plate (110), the inside of the insertion hole (112), and the outer side of the barrier plate (113).

4. The device for simultaneously measuring airflow velocity and concentration online as described in claim 1, characterized in that, The mounting cylinder (100) has mounting slots (140) on both sides inside. The fixing plate (121) is engaged with the mounting slots (140). The top of the rotating rod (120) is provided with a rotating knob.

5. The device for simultaneously measuring air-powder velocity and concentration online as described in claim 1, characterized in that, The mounting disc (110) is slidably connected to a slide rod (150). The bottom end of the slide rod (150) is fixedly connected to the inside of the mounting cylinder (100). The top end of the slide rod (150) extends to the outside of the mounting cylinder (100) and is screwed with a positioning block (151).

6. The device for simultaneously measuring air-powder velocity and concentration online as described in claim 1, characterized in that, Dustproof protective nets are placed on both sides of the top of the mounting cylinder (100), and a handle is provided on the top of the mounting plate (110).

Images