Device for detecting water content of pulverized coal

Abstract

The utility model discloses a device for detecting the water content of pulverized coal, which relates to the technical field of pulverized coal detection and comprises a pulverized coal pipeline, a detection pipe is arranged on one side of the pulverized coal pipeline, a lead is arranged at one end of the detection pipe far away from the pulverized coal pipeline, and a probe is connected to one end of the lead close to the detection pipe. A flange plate is arranged on the outer wall of the end, close to the wire, of the probe, and the wire is installed on a detection pipe at one end of the pulverized coal pipeline through matching of the flange plate and a bolt with a flange ring, so that the probe can penetrate through the detection pipe and then is inserted into the position of the inner side wall of the pulverized coal pipeline to conduct online water content detection in pulverized coal conveying. The temperature of pulverized coal is transmitted to the flange plate through the probe, the flange plate can transmit high temperature to the annular fins and the outer fins, basic heat dissipation is carried out through the annular fins and the outer fins, and the situation that normal work of a detection element is affected due to the fact that the high temperature is accumulated in the area and inaccuracy of data calculated in the later period is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pulverized coal detection, and particularly relates to a device for detecting the water content of pulverized coal. Background Technique

[0002] The devices used in power plants to detect the water content of pulverized coal usually adopt various methods for detection. One common and efficient method is the standing wave method (SWR measurement method). The following is the detailed process of online detecting the water content of pulverized coal by the standing wave method:

[0003] Detection Process

[0004] Signal emission: The high-frequency signal source generates high-frequency signals, which are propagated to the pulverized coal probe through the transmission line.

[0005] Signal reflection and superposition: Due to the impedance mismatch between the probe and the transmission line, part of the signal is reflected at the probe and superposed with the incident wave to form a standing wave.

[0006] Voltage measurement: Measure the voltage amplitude change at each point on the transmission line through a precision detection circuit.

[0007] Data analysis: According to the data of voltage change and in combination with the known relationship between the dielectric constant and the water content, calculate the water content of the pulverized coal.

[0008] Briefly speaking, when the pulverized coal flows through the probe in the conveying pipeline, the signal generated by the high-frequency signal source is transmitted to the probe through the transmission line, and reflection and superposition effects occur in the pulverized coal to form a standing wave. The detection circuit is responsible for measuring the voltage change on the transmission line and calculating the water content of the pulverized coal accordingly.

[0009] The inventor found that the following problems in the prior art were not well solved during the implementation of this solution: During the process from pulverized coal preparation to transportation to the boiler combustion chamber, the pulverized coal will undergo a series of processes, including crushing, grinding, drying, etc. These processes, especially the drying process, will increase the temperature of the pulverized coal. In addition, when the pulverized coal flows in the pipeline, due to the friction with the inner wall of the pipeline and other heat sources existing in the pipeline (such as the heat radiation of the surrounding environment, the heat conduction of other hot media in the pipeline, etc.), its temperature will further increase. Although the existing detection equipment has a certain high-temperature resistance effect, the value of its high-temperature resistance is limited. However, the temperature in the detection area of the pulverized coal conveying pipeline gradually increases. In a high-temperature environment, accidents such as current leakage may occur in the internal circuit of the equipment, randomly resulting in inaccurate data calculated later. Content of the Utility Model

[0010] The main purpose of the utility model is to provide a device for detecting the water content of pulverized coal, which can effectively solve the problems in the background technique.

[0011] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0012] A device for detecting the moisture content of pulverized coal includes a pulverized coal pipeline. One side of the pulverized coal pipeline is provided with a detection pipe. One end of the detection pipe far from the pulverized coal pipeline is provided with a wire. One end of the wire close to the detection pipe is connected with a probe. A flange plate is arranged on the outer wall of one end of the probe close to the wire. A flange ring is arranged on the outer wall of one end of the detection pipe far from the detection pipe. A plurality of annular fins are arranged on one side of the flange plate far from the flange ring. A plurality of outer fins are fixed on the outer wall of the outer annular fin. Two blowing pipes are fixedly penetrated through the top and bottom between the annular fins. A branch blowing pipe is connected between the blowing pipes. Branch blowing nozzles are arranged at both ends of the blowing pipe between adjacent annular fins.

[0013] Preferably, a plurality of bolts are arranged between the flange plate and the flange ring, and the flange plate and the heat-resistant sealing ring are detachably connected by bolts.

[0014] Preferably, a heat-resistant sealing ring is arranged between the flange plate and the flange ring.

[0015] Preferably, the branch blowing nozzles are all obliquely arranged on the blowing pipes.

[0016] Preferably, flow guiding plates are fixed at both the left and right ends between adjacent annular fins, and both sides of the flow guiding plate are arc-shaped.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. The wire is installed on the detection pipe at one end of the pulverized coal pipeline by using the flange plate, bolts and flange ring, so that the probe can pass through the detection pipe and be inserted into the inner side wall of the pulverized coal pipeline to detect the on-line moisture content during the pulverized coal transportation. The temperature of the pulverized coal is transmitted to the flange plate through the probe, and the flange plate will transfer the high temperature to a plurality of annular fins and outer fins, and the basic heat dissipation is carried out through the annular fins and outer fins, so as to avoid the influence of high temperature accumulation in this area on the normal operation of the detection element and the inaccuracy of the calculated data in the later stage.

[0019] 2. The fan is connected to the branch blowing pipe through a pipeline. The branch blowing pipe distributes the air into the two blowing pipes at the top and bottom respectively. Branch blowing nozzles are arranged at both ends of the blowing pipe between adjacent two annular fins. The blown air can be blown to the space between adjacent two annular fins through the branch blowing nozzles, and the high temperature dissipated from the surface of the annular fins is taken away, so as to avoid accumulation between adjacent annular fins and accelerate the cooling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a device for detecting the moisture content of pulverized coal according to the utility model;

[0021] Figure 2 Schematic diagram of the disassembled structure of a device for detecting the moisture content of pulverized coal according to the present utility model;

[0022] Figure 3 Exploded view structure diagram of the annular fins and the flow guide plate of a device for detecting the moisture content of pulverized coal according to the present utility model;

[0023] Figure 4 Schematic diagram of the structure of the blow pipe of a device for detecting the moisture content of pulverized coal according to the present utility model after being sectioned.

[0024] In the figure: 1, pulverized coal pipeline; 2, detection pipe; 3, wire; 4, flange plate; 5, flange ring; 6, probe; 7, heat-resistant sealing ring; 8, bolt; 9, annular fin; 10, outer fin; 11, blow pipe; 1101, sub-blow nozzle pipe; 12, sub-blow pipe; 13, flow guide plate. Specific implementation mode

[0025] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific implementation modes.

[0026] As Figures 1-4 shown, a device for detecting the moisture content of pulverized coal includes a pulverized coal pipeline 1. A detection pipe 2 is arranged on one side of the pulverized coal pipeline 1. A wire 3 is arranged at one end of the detection pipe 2 away from the pulverized coal pipeline 1. A probe 6 is connected to one end of the wire 3 close to the detection pipe 2. A flange plate 4 is arranged on the outer wall of one end of the probe 6 close to the wire 3. A flange ring 5 is arranged on the outer wall of one end of the detection pipe 2 away from the detection pipe 2. A plurality of annular fins 9 are arranged on one side of the flange plate 4 away from the flange ring 5. A number of outer fins 10 are fixed on the outer wall of the outer annular fin 9. Two blow pipes 11 are fixedly penetrated through the top and bottom between the annular fins 9. A sub-blow pipe 12 is connected between the blow pipes 11. Sub-blow nozzle pipes 1101 are arranged at both ends of the blow pipe 11 located between adjacent annular fins 9.

[0027] Specifically, a plurality of bolts 8 are arranged between the flange plate 4 and the flange ring 5, and the flange plate 4 and the heat-resistant sealing ring 7 are detachably connected by the bolts 8. A heat-resistant sealing ring 7 is arranged between the flange plate 4 and the flange ring 5 to play a sealing role.

[0028] Specifically, the sub-blow nozzle pipes 1101 are all inclined on the blow pipe 11.

[0029] Specifically, flow guide plates 13 are fixed at both the left and right ends between adjacent annular fins 9. Both sides of the flow guide plate 13 are in an arc shape. The air blown out from the sub-blowing nozzle tube 1101 travels along the space between adjacent annular fins 9. When it hits the flow guide plate 13, it will be guided along the arc-shaped side wall of the flow guide plate 13 to the outside of the annular fin 9, so that it can be better dissipated and prevent accumulation between adjacent annular fins 9.

[0030] Working principle:

[0031] The wire 3 is installed on the detection tube 2 at one end of the pulverized coal pipeline 1 through the use of the flange plate 4, bolts 8 and flange ring 5, so that the probe 6 can pass through the detection tube 2 and insert into the position of the inner side wall of the pulverized coal pipeline 1 for on-line moisture content detection during pulverized coal transportation. The temperature of the pulverized coal is transmitted to the flange plate 4 through the probe 6, and the flange plate 4 will transfer the high temperature to several annular fins 9 and outer fins 10 for basic heat dissipation, avoiding the accumulation of high temperature in this area, which may affect the normal operation of the detection element and the inaccuracy of the data calculated later. The fan is connected to the sub-blowing pipe 12 through a pipeline. The sub-blowing pipe 12 distributes the air to the two blowing pipes 11 at the top and bottom respectively. The sub-blowing nozzle tubes 1101 are provided at both ends of the blowing pipe 11 located between two adjacent annular fins 9. The blown air can be blown to the space between two adjacent annular fins 9 through the sub-blowing nozzle tubes 1101, and take away the high temperature dissipated from their surfaces, preventing accumulation between adjacent annular fins 9 and accelerating the cooling effect.

[0032] The circuits, electronic components and control modules involved are all prior arts and can be fully realized by those skilled in the art without elaboration. The content protected by the present invention does not involve the improvement of software and methods.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the moisture content of pulverized coal, comprising a pulverized coal pipeline (1), characterized in that: A detection pipe (2) is arranged on one side of the pulverized coal pipeline (1). A wire (3) is provided at one end of the detection pipe (2) away from the pulverized coal pipeline (1). A probe (6) is connected to one end of the wire (3) close to the detection pipe (2). A flange plate (4) is arranged on the outer wall of one end of the probe (6) close to the wire (3). A flange ring (5) is arranged on the outer wall of one end of the detection pipe (2) away from the detection pipe (2). A plurality of annular fins (9) are arranged on one side of the flange plate (4) away from the flange ring (5). A number of outer fins (10) are fixed on the outer wall of the outer annular fin (9). Two blowing pipes (11) are fixedly penetrated through the top and bottom between the annular fins (9). A sub-blowing pipe (12) is connected between the blowing pipes (11). Sub-blowing nozzles (1101) are arranged at both ends of the blowing pipe (11) located between adjacent annular fins (9).

2. The moisture content detection device for pulverized coal according to claim 1, characterized in that: A plurality of bolts (8) are arranged between the flange plate (4) and the flange ring (5), and the flange plate (4) and the heat-resistant sealing ring (7) are detachably connected by bolts (8).

3. The moisture content detection device for pulverized coal according to claim 1, wherein: A heat-resistant sealing ring (7) is arranged between the flange plate (4) and the flange ring (5).

4. The moisture content detection device for pulverized coal according to claim 1, characterized in that: The sub-blowing nozzles (1101) are all inclined on the blowing pipes (11).

5. The moisture content detection device for pulverized coal according to claim 1, wherein: Flow guide plates (13) are fixed at the left and right ends between adjacent annular fins (9), and both sides of the flow guide plate (13) are arc-shaped.

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