Device for eliminating environmental interference of radar level gage of raw coal bunker of thermal power plant

Abstract

The utility model discloses a device for eliminating environmental interference of a radar level gage of a raw coal bunker of a thermal power plant, and relates to the technical field of flue gas purification. The system comprises a coal bunker, a coal bunker top cover is arranged at the top of the coal bunker, a bunker bay floor slab is arranged above the coal bunker top cover, and the bottom of the radar level gauge is connected with the top of a first steel pipe; the bottom of the first steel pipe sequentially penetrates through a bunker bay floor and a bunker top cover and then extends into the bunker; the air compressor main pipe is connected with a compressed air main pipe, a plurality of compressed air branch pipes are arranged on the compressed air main pipe, and the compressed air branch pipes are communicated with the side face of a first steel pipe above a bunker bay floor. According to the utility model, the air source of the air compressor near the raw coal bunker of the thermal power plant is led to the installation position of the radar level gauge to purge the probe, so that the problem that the coal dust environment and the water vapor environment of the existing raw coal bunker affect the actual measurement data of the radar level gauge is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas purification, and more specifically is a device for eliminating environmental interference of a radar level meter of a raw coal bunker in a thermal power plant. Background Art

[0002] Radar level meter is a measuring instrument based on the time travel principle. Radar waves run at the speed of light, and the running time can be converted into level signals through electronic components.

[0003] The raw coal bunker of a thermal power plant uses a radar level meter to measure the accumulation of coal in the raw coal bunker. Because the radar level meter is installed in a coal dust and water vapor environment for a long time, the measurement data often jumps and is distorted, and cannot reflect the actual coal level in the bunker, resulting in the operator being unable to make accurate judgments and control the operation of the entire material system.

[0004] Therefore, it is necessary to develop a device to eliminate environmental interference of radar level meter in raw coal bunker of thermal power plant. Summary of the invention

[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and to provide a device for eliminating environmental interference of a radar level meter of a raw coal bunker in a thermal power plant.

[0006] In order to achieve the above-mentioned purpose, the technical scheme of the utility model is: a device for eliminating environmental interference of a radar level meter of a raw coal bunker in a thermal power plant, comprising a coal bunker, a coal bunker top cover is arranged on the top of the coal bunker, and a coal bunker inter-floor is arranged above the coal bunker top cover, characterized in that: it also comprises a radar level meter and an air compressor mother pipe, the bottom of the radar level meter is connected to the top of a first steel pipe; the bottom of the first steel pipe sequentially penetrates the coal bunker inter-floor and the coal bunker top cover and then extends into the coal bunker;

[0007] The air compressor main pipe is connected to a compressed air main pipe, a plurality of compressed air branch pipes are arranged on the compressed air main pipe, and the compressed air branch pipes are communicated with the side of the first steel pipe above the floor of the coal bunker room.

[0008] In the above technical solution, the top of the first steel pipe is welded to the first flange, the first flange is connected to the second flange via mounting bolts, and the radar level meter is connected to the second flange.

[0009] In the above technical solution, a ball valve is provided on the compressed air main pipe.

[0010] In the above technical solution, the compressed air branch pipe includes a first branch pipe and a second branch pipe, the diameter of the first branch pipe is larger than that of the second branch pipe, one end of the first branch pipe is connected to the compressed main gas mother pipe, and the other end is connected to the second branch pipe through a reducer, and the second branch pipe is connected to the side of the first steel pipe above the floor of the coal bunker room.

[0011] In the above technical solution, the first branch pipe has the same diameter as the compressed air main pipe, and the first branch pipe is connected to the compressed air main pipe through a tee.

[0012] In the above technical solution, a needle valve is provided on the reducer.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1) The utility model uses bolts, flanges, steel pipes and other common materials to install the radar level meter on the coal bunker floor which is convenient for inspection and maintenance, and uses steel pipes, reducers, tees, elbows, needle valves, ball valves and other common equipment materials to lead the air source of the air compressor near the raw coal bunker of the thermal power plant to the installation place of the radar level meter to purge its probe.

[0015] 2) The utility model effectively solves the problem that the coal dust environment and water vapor environment of the existing raw coal bin affect the actual measurement data of the radar level meter.

[0016] 3) The existing technologies mostly start from the self-cleaning angle of the radar level meter itself, which has great limitations and cannot completely solve the interference of the environment on the radar level meter. The utility model has a wide range of applications and is simpler and easier to operate.

[0017] 4) The utility model utilizes the first steel pipe to achieve the connection between the radar level meter and the coal bunker, which is more convenient for inspection and maintenance while ensuring the function of the radar level meter.

[0018] 5) The utility model is applicable to radar material levels of different manufacturers and is simple and easy to operate. The installation materials in the utility model can be obtained through conventional procurement, without the need for special customization, and is highly practical. During use, the utility model can prevent the radar material level meter from generating measurement errors due to dust and water vapor interference by purging. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the radar level meter and coal bunker.

[0020] Figure 2 It is a schematic diagram of the structure of the radar level meter, the first flange and the second flange.

[0021] Figure 3 It is a structural schematic diagram of the utility model.

[0022] Among them, 1-coal bunker, 11-coal bunker top cover, 12-coal bunker floor, 2-radar level meter, 3-air compressor main pipe, 41-first steel pipe, 42-first flange, 43-mounting bolt, 431-threaded hole, 44-second flange, 51-compressed air main pipe, 52-compressed air branch pipe, 521-first branch pipe, 522-second branch pipe, 523-reducing pipe, 53-ball valve, 54-needle valve, 55-tee, 56-elbow. DETAILED DESCRIPTION

[0023] The following is a detailed description of the implementation of the utility model in conjunction with the accompanying drawings, but they do not constitute a limitation of the utility model and are only used as examples. At the same time, the advantages of the utility model will become clearer and easier to understand through the description.

[0024] Referring to the attached drawings, it can be seen that a device for eliminating environmental interference of a radar level meter in a raw coal bunker of a thermal power plant comprises a coal bunker 1, a coal bunker roof 11 is arranged on the top of the coal bunker 1, and a coal bunker inter-floor 12 is arranged above the coal bunker roof 11, characterized in that it also comprises a radar level meter 2 and an air compressor main pipe 3, the bottom of the radar level meter 2 is connected to the top of a first steel pipe 41; the bottom of the first steel pipe 41 sequentially penetrates the coal bunker inter-floor 12 and the coal bunker roof 11 and then extends into the coal bunker 1;

[0025] The air compressor main pipe 3 is connected to a compressed air main pipe 51 , and a plurality of compressed air branch pipes 52 are provided on the compressed air main pipe 51 . The compressed air branch pipes 52 are connected to the side of the first steel pipe 41 above the coal bunker floor 12 .

[0026] The top of the first steel pipe 41 is welded to the first flange 42 . The first flange 42 is connected to the second flange 44 via mounting bolts 43 . The radar level meter 2 is connected to the second flange 44 .

[0027] The compressed air main pipe 51 is provided with a ball valve 53 .

[0028] The compressed air branch pipe 52 includes a first branch pipe 521 and a second branch pipe 522. The diameter of the first branch pipe 521 is larger than that of the second branch pipe 522. One end of the first branch pipe 521 is connected to the compressed air main pipe 51, and the other end is connected to the second branch pipe 522 through a reducer 523. The second branch pipe 522 is connected to the side of the first steel pipe 41 above the coal bunker floor 12.

[0029] The first branch pipe 521 has the same diameter as the compressed air main pipe 51 , and the first branch pipe 521 is connected to the compressed air main pipe 51 through a tee 55 .

[0030] The reducer 523 is provided with a needle valve 54 .

[0031] Example

[0032] In a certain thermal power plant, there is a 1.5-meter mezzanine between the coal bunker roof 11 and the coal bunker floor 12, and there is a structural beam in the mezzanine.

[0033] The first steel pipe 41 is a steel pipe with a length of 1700mm and a diameter of 300mm; the compressed air main pipe 51 is a steel pipe with a diameter of 16mm; the first branch pipe 521 is a steel pipe with a diameter of 16mm; the second branch pipe 522 is a steel pipe with a diameter of 6mm; the reducer 523 is a φ16 to 6 reducer; the tee 55 is a φ16 tee; the engineering materials of the utility model are all commonly used engineering materials and do not require special production.

[0034] A method for installing a device for eliminating environmental interference of a radar level meter in a raw coal bunker of a thermal power plant comprises the following steps:

[0035] Step 1: pre-embed a 400X400 flat iron on the top of the coal bunker 1, and open a φ300 hole in the middle; weld the first steel pipe 41 in the hole, and the top of the first steel pipe 41 is 150mm higher than the top of the coal bunker floor 12;

[0036] Step 2: Weld the second branch pipe 522 on the side of the first steel pipe 41 close to the gas source to achieve the connection between the second branch pipe 522 and the first steel pipe 41. Here, the gas source directly blows the air inlet hole of the radar level meter 2;

[0037] Step 3: Weld the first steel pipe 41 to the first flange 42; this step needs to be coordinated with step 2. Under the premise of not affecting the installation of the first flange 42, the second branch pipe 522 is welded as close to the position of the radar level meter 2 probe as possible;

[0038] Step 4: Use the mounting bolts 43 to install and fix the second flange 44 and the radar level meter 2;

[0039] Step 5: Lay the compressed air main pipe 51, and install the compressed air main pipe 51, the ball valve 53, the tee 55, the elbow 56, the first branch pipe 521, the reducer 523, and the needle valve 54 in sequence from the air compressor along the installation position of the radar level meter 2, and then connect it with the second branch pipe 522 in step 2;

[0040] Step 6: Open the ball valve 53 and adjust the opening of the needle valve 54 to achieve purging of the radar level meter 2.

[0041] The utility model is suitable for radar material levels of different manufacturers and is simple and easy to operate; the installation materials in the utility model can be obtained through conventional procurement, no special customization is required, and the utility model is highly practical; during use, the utility model can prevent the radar material level meter 2 from generating measurement errors due to dust and water vapor interference by purging.

[0042] Other parts not described belong to the prior art.

Claims

1. A device for eliminating environmental interference of a radar level meter in a raw coal bunker of a thermal power plant, comprising a coal bunker (1), a coal bunker roof (11) being arranged on the top of the coal bunker (1), and a coal bunker inter-floor (12) being arranged above the coal bunker roof (11), characterized in that: It also includes a radar level meter (2) and an air compressor main pipe (3); the bottom of the radar level meter (2) is connected to the top of a first steel pipe (41); the bottom of the first steel pipe (41) sequentially penetrates the coal bunker floor (12) and the coal bunker top cover (11) and then extends into the coal bunker (1); The air compressor main pipe (3) is connected to a compressed air main pipe (51), and a plurality of compressed air branch pipes (52) are arranged on the compressed air main pipe (51). The compressed air branch pipes (52) are connected to the side of the first steel pipe (41) above the coal bunker floor (12).

2. The device for eliminating environmental interference of the radar level meter of the raw coal bunker of a thermal power plant according to claim 1 is characterized by: The top of the first steel pipe (41) is welded to the first flange (42), the first flange (42) is connected to the second flange (44) via mounting bolts (43), and the radar level meter (2) is connected to the second flange (44).

3. The device for eliminating environmental interference of the radar level meter of the raw coal bunker of a thermal power plant according to claim 1 is characterized by: The compressed air main pipe (51) is provided with a ball valve (53).

4. The device for eliminating environmental interference of the radar level meter of the raw coal bunker of a thermal power plant according to claim 3 is characterized by: The compressed air branch pipe (52) comprises a first branch pipe (521) and a second branch pipe (522). The diameter of the first branch pipe (521) is larger than that of the second branch pipe (522). One end of the first branch pipe (521) is connected to the compressed air main pipe (51), and the other end is connected to the second branch pipe (522) through a reducer (523). The second branch pipe (522) is connected to the side of the first steel pipe (41) above the coal bunker floor (12).

5. The device for eliminating environmental interference of the radar level meter of the raw coal bunker of a thermal power plant according to claim 4 is characterized by: The first branch pipe (521) has the same diameter as the compressed air main pipe (51), and the first branch pipe (521) is connected to the compressed air main pipe (51) via a tee (55).

6. The device for eliminating environmental interference of radar level meter in raw coal bunker of thermal power plant according to claim 4, characterized in that: The reducer (523) is provided with a needle valve (54).

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