Smoke and gas sampling and detection equipment with U-shaped three-way pipe

Abstract

The present invention discloses a smoke and fume sampling and detection device with a U-shaped three-way pipe, comprising: a U-shaped three-way pipe, a smoke and fume intake pipe, a sampling gun body, and a humidity sensor. The U-shaped three-way pipe is connected to the front end of the sampling gun body in an inverted state, and the smoke and fume intake pipe is arranged inside the sampling gun body. The U-shaped three-way pipe is a hollow U-shaped pipe, and the front end of the U-shaped three-way pipe is provided with a first opening, and the rear side wall of the rear end of the U-shaped three-way pipe is provided with a second opening and connected to the front end of the smoke and fume intake pipe, and the first opening is connected with the second opening, and the humidity sensor is arranged inside the U-shaped three-way pipe. The smoke and fume emitted by the fixed pollution source enters the U-shaped three-way pipe from the first opening of the U-shaped three-way pipe, passes through the humidity sensor, and is introduced into the smoke and fume intake pipe from the second opening of the U-shaped three-way pipe. The present invention is a smoke and fume sampling and detection device that can effectively protect the humidity sensor from being damaged by wind pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of smoke and fume sampling and processing equipment, and in particular to a smoke and fume sampling and detection equipment capable of effectively protecting a humidity sensor from being damaged by wind pressure. Background Art

[0002] 1. According to the requirements of relevant environmental protection regulations and standards, when power station boilers, industrial boilers and other flue gas are discharged, the flue gas outlet velocity is generally around 10m / s to 30m / s, and the most suitable chimney outlet gas velocity is 15m / s. Under normal circumstances, the wind speed where the humidity sensor is located should not exceed 3m / s. The wind pressure is proportional to the square of the wind speed. The greater the wind speed, the greater the wind pressure on the plane perpendicular to the airflow direction, and the more serious the damage to the humidity sensor.

[0003] 2. The existing integrated working condition detector does not provide fundamental protection for the humidity sensor when detecting humidity in the flue. Changes in wind speed will affect the measurement results of the humidity sensor. During on-site measurement, when the wind speed in the environment where the humidity sensor is located exceeds the maximum wind speed it can withstand, overpressure will cause sensor detection failure.

[0004] 3. In actual use, due to the influence of dust, oil and harmful gases, the humidity sensor will age and its accuracy will decrease after a long period of use.

[0005] Therefore, there is an urgent need for a smoke and flue gas sampling and detection device that can effectively protect the humidity sensor from being damaged by wind pressure. Summary of the invention

[0006] The object of the present invention is to provide a smoke and fume sampling and detection device which can effectively protect a humidity sensor from being damaged by wind pressure.

[0007] In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is as follows: a smoke and smoke sampling and detection device with a U-shaped three-way pipe is provided, which can be used to detect the humidity information of the smoke and smoke emitted by the fixed pollution source through the humidity sensor, comprising: a U-shaped three-way pipe, a smoke and smoke inlet pipe, a sampling gun body, and a humidity sensor, the U-shaped three-way pipe is connected to the front end of the sampling gun body in an inverted state, the smoke and smoke inlet pipe is arranged inside the sampling gun body, the U-shaped three-way pipe is a hollow U-shaped pipe, the front end of the U-shaped three-way pipe is provided with a first opening, the rear side wall of the rear end of the U-shaped three-way pipe is provided with a second opening and is connected to the front end of the smoke and smoke inlet pipe, the first opening is connected with the second opening, the humidity sensor is arranged inside the U-shaped three-way pipe, the smoke and smoke emitted by the fixed pollution source enters the U-shaped three-way pipe from the first opening of the U-shaped three-way pipe, passes through the humidity sensor, and is introduced into the smoke and smoke inlet pipe from the second opening of the U-shaped three-way pipe.

[0008] The rear end of the U-shaped three-way pipe is provided with a third opening, and the first opening, the second opening and the third opening are mutually connected in pairs, and the first opening and the third opening are both provided with filter screens.

[0009] The humidity sensor is arranged at the bending position of the U-shaped three-way pipe.

[0010] It also includes a wind speed sensor, and the humidity sensor and the wind speed sensor are both arranged at the bending part of the U-shaped three-way pipe.

[0011] The rear side wall of the rear end of the U-shaped three-way pipe is provided with a flange at the second opening, and the flange can be pluggably inserted into the front end of the smoke and gas inlet pipe for connection.

[0012] Compared with the prior art, since the present invention introduces the U-shaped three-way pipe, when the humidity of the smoke and flue gas in the fixed pollution source is detected by the present invention, the U-shaped three-way pipe can buffer the flow rate of the smoke and flue gas entering the U-shaped three-way pipe, reduce the flow rate of the smoke and flue gas, thereby effectively preventing the smoke and flue gas from damaging the humidity sensor due to the large particles of dust carried by the smoke and flue gas due to excessively high flow rate.

[0013] The present invention will become more apparent from the following description taken in conjunction with the accompanying drawings, which are used to illustrate embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Shown is a schematic diagram of an embodiment of a smoke and flue gas sampling and detection device with a U-shaped three-way pipe of the present invention.

[0015] Figure 2 Shown is a schematic diagram of a U-shaped tee pipe. DETAILED DESCRIPTION

[0016] According to the requirements of relevant environmental protection regulations and standards, when power station boilers, industrial boilers, chimneys and other flue gases are discharged, the flue gas outlet velocity is generally around 10m / s to 30m / s, and the most suitable chimney outlet gas velocity is 15m / s. Wind pressure is proportional to the square of wind speed. The greater the wind speed, the greater the wind pressure on the plane perpendicular to the airflow direction, and the more serious the damage caused to the humidity sensor by large particles contained in the smoke and flue gas. Existing working condition detectors or smoke and flue gas sampling and detection equipment do not provide fundamental protection for humidity sensors when detecting temperature and humidity. When the maximum wind pressure that the humidity sensor can withstand is exceeded, it will cause sensor detection failure.

[0017] It should be noted that the working condition detector mentioned above is a device used to detect working condition information in fixed pollution sources. Before formally testing the temperature, humidity and other information of smoke and flue gas in fixed pollution sources, the working condition information in the fixed pollution sources is tested in advance, so that a general understanding of the working condition information in the fixed pollution sources can be obtained in advance. Generally speaking, before sampling and testing the smoke and flue gas in fixed pollution sources, the temperature and humidity information of the smoke and flue gas in the fixed pollution sources will be tested in advance using a working condition detector. Only when the temperature and humidity of the smoke and flue gas in the fixed pollution sources are suitable for sampling by more precise smoke and flue gas sampling and testing equipment, can the smoke and flue gas sampling and testing equipment be inserted into the fixed pollution sources for sampling and testing. There are also integrated working condition detectors and sampling and testing equipment on the market, which are not specifically restricted in this article.

[0018] It should also be noted that the operating condition information within a fixed pollution source refers to the physical information such as the temperature, humidity, flow rate, etc. of the smoke and flue gas within the fixed pollution source. It can also be chemical information, which is not specifically limited in this article.

[0019] It should also be noted that fixed pollution sources usually refer to places, equipment and devices that emit or release harmful substances into the environment or have harmful effects on the environment. Air pollution sources include fixed pollution sources and mobile pollution sources. Fixed pollution sources are further divided into organized emission sources and unorganized emission sources. Organized fixed pollution sources refer to power station boilers, industrial boilers, flues, chimneys and exhaust pipes, etc. In this article, it mainly refers to organized fixed pollution sources, and there is no specific restriction on whether it is a flue, chimney or exhaust pipe.

[0020] In one embodiment, taking a chimney as an example, when the chimney is subjected to smoke and flue gas detection by means of an operating condition detector or a smoke and flue gas sampling and detection device, the above-mentioned instrument or device is usually directly inserted into the sampling port of the chimney for detection. When sampling is performed through the sampling port, a part of the smoke and flue gas in the chimney will enter the sampling tube of the above-mentioned instrument or device through the sampling port, forming a smoke and flue gas sample for sampling and detection.

[0021] Embodiments of the present invention will now be described with reference to the accompanying drawings, in which like reference numerals represent like elements. Figure 1 , 2The present invention provides a smoke and flue gas sampling and detection device 100 with a U-shaped three-way pipe, which can be used to detect the humidity information of smoke and flue gas emitted by a fixed pollution source 10 through a humidity sensor, comprising: a U-shaped three-way pipe 1, a smoke and flue gas intake pipe 2, a sampling gun body 3, and a humidity sensor 4. The U-shaped three-way pipe 1 is connected to the front end of the sampling gun body 3 in an inverted state, and the smoke and flue gas intake pipe 2 is arranged inside the sampling gun body 3. The U-shaped three-way pipe 1 is a hollow U-shaped pipe, that is, the inside of the U-shaped three-way pipe 1 is a buffer tube with a U-shaped hollow cavity. The front end of the U-shaped three-way pipe 1 is provided with a first opening 11, and the A second opening 12 is provided on the rear side wall of the rear end of the U-shaped three-way pipe 1 and is connected to the front end of the smoke and fume intake pipe 2. The first opening 11 and the second opening 12 are connected. Specifically, the first opening 11 and the second opening 12 are both connected to the U-shaped hollow cavity inside the U-shaped three-way pipe 1. The humidity sensor 4 is arranged inside the U-shaped three-way pipe 1. The smoke and fume emitted by the fixed pollution source 10 enters the U-shaped three-way pipe 1 from the first opening 11 of the U-shaped three-way pipe 1, passes through the humidity sensor 4, and is introduced into the smoke and fume intake pipe 2 from the second opening 12 of the U-shaped three-way pipe 1.

[0022] Explain: "inverted state", specific reference Figure 1 , 2 The smoke and flue gas from fixed pollution sources such as chimneys flows from bottom to top, and the "inverted state" means that the U-shaped opening 15 of the U-shaped three-way pipe 1 is facing downward, and the smoke and flue gas can enter the interior of the U-shaped three-way pipe 1 from bottom to top through the first opening 11.

[0023] It should be noted that the greater the flow rate of the smoke and flue gas emitted by the fixed pollution source, the greater the wind pressure value that the humidity sensor 4 that detects the humidity information of the smoke and flue gas inside the fixed pollution source may be subjected to. When the smoke and flue gas in the fixed pollution source is discharged, particles with relatively large particle sizes may be discharged at the same time. If the large particle size particles directly hit the surface of the humidity sensor 4, the humidity sensor 4 may be damaged.

[0024] It should be noted that the smoke and fume entering the first opening 11 of the U-shaped three-way pipe 1 will be buffered in the U-shaped three-way pipe 1, and the smoke and fume enter from the first opening 11 from bottom to top, rise to the highest point in the U-shaped three-way pipe 1 on one side of the U-shaped three-way pipe, and then descend to the second opening 12 from the other side, and then enter the smoke and fume inlet pipe 2 from the second opening 12. Therefore, the flow velocity of the smoke and fume entering the U-shaped three-way pipe 1 will be greatly reduced, so the wind pressure on the humidity sensor 4 will be greatly reduced.

[0025] refer to Figure 2 The rear end of the U-shaped three-way pipe 1 is provided with a third opening 13, and the first opening 11, the second opening 12 and the third opening 13 are interconnected in pairs, and the first opening 11 and the third opening 13 are both provided with a filter screen.

[0026] refer to Figure 2 As shown, the humidity sensor 4 is arranged at the bending part of the U-shaped three-way pipe 1.

[0027] Specifically, the U-shaped three-way pipe 1 is a hollow U-shaped pipe, and the first opening 11, the second opening 12 and the third opening 13 are all connected to the U-shaped hollow cavity inside the U-shaped three-way pipe 1. When the U-shaped three-way pipe 1 is placed inside a fixed pollution source, such as a chimney flue, smoke and smoke will enter the U-shaped cavity from the first opening 11 and the third opening 13 at the same time, and be introduced into the smoke and smoke intake pipe 2 from the second opening 12. The advantage of such a setting is that the wind pressure on both sides of the humidity sensor 4 arranged in the U-shaped three-way pipe 1 can be offset, so that the wind pressure on the humidity sensor 4 is greatly reduced, and the humidity sensor 4 can be prevented from being damaged by high wind pressure and particles carried by the high wind pressure. Therefore, the service life of the humidity sensor 4 can be maximized.

[0028] Specifically, a filter is provided at each of the first opening 11 and the third opening 13. The apertures of the filter provided at the first opening 11 and the third opening 13 are different, and the wind pressure entering the first opening 11 and the third opening 13 is controlled to ensure that the flow rate of the smoke flowing through the humidity sensor 4 is within the target value range. It should be noted that this "target value" refers to the flow rate of the smoke that will not damage the humidity sensor 4.

[0029] It should be noted that, by setting the aperture sizes of the filter to different ones, the wind pressure at the first opening 11 is greater than the wind pressure at the third opening 13. Therefore, the amount of smoke and flue gas entering the third opening 13 will be much smaller than the amount entering the first opening 11, and will be introduced into the smoke and flue gas inlet pipe 2 from the second opening 12.

[0030] In one embodiment, reference Figure 2 As shown, the wind speed sensor 5 is also included, and the humidity sensor 4 and the wind speed sensor 5 are both arranged at the bend of the U-shaped three-way pipe 1. The wind speed sensor 5 is arranged, and the location of the wind speed sensor 5 and the humidity sensor 4 is basically consistent. Therefore, the magnitude information of the wind speed detected by the wind speed sensor 5 is the magnitude of the wind speed of the environment where the humidity sensor 4 is located, so it is convenient to grasp the magnitude information of the wind speed received by the humidity sensor 4.

[0031] In one embodiment, reference Figure 2 As shown, the rear side wall of the rear end of the U-shaped three-way pipe 1 is provided with a flange 14 at the second opening 12, and the flange 14 can be plugged into the front end of the smoke and smoke inlet pipe 2 for connection. The flange 14 can well plug the U-shaped three-way pipe 1 and the smoke and smoke inlet pipe 2, and the U-shaped three-way pipe 1 can also be removed from the smoke and smoke inlet pipe 2. When the humidity sensor 4 is needed to detect the humidity of the smoke and smoke, it can be quickly installed, and when the detection is completed, it can be removed.

[0032] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A smoke and flue gas sampling and detection device with a U-shaped three-way pipe, which can be used to detect the humidity information of smoke and flue gas emitted by a fixed pollution source through a humidity sensor, characterized in that: include: A U-shaped three-way pipe, a smoke and flue gas intake pipe, a sampling gun body, and a humidity sensor, wherein the U-shaped three-way pipe is connected to the front end of the sampling gun body in an inverted state, and the smoke and flue gas intake pipe is arranged inside the sampling gun body. The U-shaped three-way pipe is a hollow U-shaped pipe, and a first opening is provided at the front end of the U-shaped three-way pipe, and a second opening is provided at the rear side wall of the rear end of the U-shaped three-way pipe and is connected to the front end of the smoke and flue gas intake pipe, and the first opening is connected to the second opening, and the humidity sensor is arranged inside the U-shaped three-way pipe, and the smoke and flue gas emitted by the fixed pollution source enters the U-shaped three-way pipe from the first opening of the U-shaped three-way pipe, passes through the humidity sensor, and is introduced into the smoke and flue gas intake pipe from the second opening of the U-shaped three-way pipe; A third opening is provided at the rear end of the U-shaped three-way pipe, and the first opening, the second opening and the third opening are mutually connected in pairs, and a filter screen is provided at the first opening and the third opening, and the apertures of the filter screens at the first opening and the third opening are different, so that the wind pressure at the first opening is greater than the wind pressure at the third opening; The humidity sensor is arranged at the bending part of the U-shaped three-way pipe; The humidity sensor and wind speed sensor are both arranged at the bend of the U-shaped three-way pipe; The rear side wall of the rear end of the U-shaped three-way pipe is provided with a flange at the second opening, and the flange can be pluggably inserted into the front end of the smoke and gas inlet pipe for connection.

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