Fly ash sampling device

Abstract

The utility model discloses a fly ash sampling device which comprises a sampling pipe, an air exhaust piece, a gas-solid separator and a collecting tank, one end of the sampling pipe penetrates into a flue, the sampling pipe is provided with a plurality of sampling ports distributed at intervals, the sampling ports face upwards and are located in the flue, the gas-solid separator is provided with a flue gas inlet, an air exhaust port and an ash discharge port, and the collecting tank is arranged in the flue. The gas outlet is communicated with a gas inlet of the gas extraction piece, the flue gas inlet is communicated with the other end of the sampling pipe, and the collecting tank is detachably mounted at the ash discharge port, so that negative pressure extraction treatment can be performed in the gas-solid separator by the gas extraction piece, and the plurality of sampling ports of the sampling pipe suck flue gas into the gas-solid separator from a flue; flue gas settles fly ash into the collecting tank in the gas-solid separator, gas distribution is pumped and sent out by the gas pumping part, the fly ash sampling device is convenient to sample, sampling can be carried out by installing the collecting tank and starting the gas pumping part, multi-point sampling can be carried out in the flue, and the sampling precision is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of boilers, and in particular relates to a fly ash sampling device. Background Art

[0002] For thermal power plants, the fly ash in their flues contains a variety of harmful substances, such as heavy metals and radioactive substances, which pose a threat to the environment and human health. The collection and treatment of fly ash is not only related to environmental protection, but also to improving energy efficiency. By effectively collecting fly ash, energy waste can be reduced and combustion efficiency can be improved. Traditional fly ash sampling methods may have operational risks, such as high-temperature burns, toxic gas leakage, etc., and their sampling accuracy is low. Although a fly ash sampling device is disclosed in document number CN104155152A "Portable Fly Ash Sampling Device", its ash collection tank is only connected to the flue, which results in a relatively single ash collection point, which will lead to a reduction in the accuracy of subsequent fly ash detection results. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a fly ash sampling device which has a simple structure, is convenient for sampling, and has good sampling safety.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a fly ash sampling device, comprising a sampling tube, an exhaust piece, a gas-solid separator and a collecting tank, one end of the sampling tube is inserted into the flue, and the sampling tube has a plurality of sampling ports distributed at intervals and located in the flue, the gas-solid separator has a flue gas inlet, an exhaust port and an ash discharge port, the exhaust port is connected to the air inlet of the exhaust piece, the flue gas inlet is connected to the other end of the sampling tube, and the collecting tank is detachably installed at the ash discharge port.

[0005] The beneficial effect of the above technical solution is that the vacuum device can be used to draw negative pressure into the gas-solid separator, so that the multiple sampling ports of the sampling tube can suck the flue gas from the flue into the gas-solid separator, and the flue gas will settle the fly ash into the collection tank in the gas-solid separator, and the gaseous distribution is sucked out by the vacuum device. The fly ash sampling device is easy to sample. Sampling can be done by installing the collection tank and starting the vacuum device. In addition, it can perform multi-point sampling in the flue with high sampling accuracy.

[0006] In the above technical solution, the plurality of sampling ports are distributed on the sampling tube at intervals along the length direction of the sampling tube.

[0007] The beneficial effects of the above technical solution are: its structure is simple, and multiple sampling points can be distributed at intervals in the radial direction of the flue.

[0008] In the above technical solution, a partition plate is further provided on the sampling tube, and the sampling tube vertically passes through the partition plate, and the partition plate is used to be connected to the tube wall of the flue.

[0009] The beneficial effect of the above technical solution is that the location where the sampling tube passes through the flue can be sealed by the partition plate, thereby preventing the smoke in the flue from leaking out.

[0010] The baffle plate in the above technical solution is a flange ring, and a tubular portion coaxially docked with its inner hole is convexly provided on the side of the baffle plate away from the flue. The sampling tube passes through the inner hole of the baffle plate and is supported on the tubular portion.

[0011] The beneficial effects of the above technical solution are: its structure is simple and it makes it more convenient to install the partition plate on the flue.

[0012] The gas-solid separator in the above technical solution includes a shell and an ash baffle arranged in the shell, the flue gas inlet is arranged on the side wall of the shell, and the ash baffle is located above the flue gas inlet, the exhaust port is arranged at the upper end of the shell, and the ash discharge port is arranged at the lower end of the shell, and the ash baffle is used to settle fly ash in the flue gas in the shell.

[0013] The beneficial effect of the above technical solution is that when the flue gas ascends in the shell, the fly ash is blocked by the ash baffle to accelerate the settling of the fly ash, so that the fly ash can be collected by the collection tank.

[0014] In the above technical solution, the shell is a vertically arranged flat shell, and a plurality of ash baffles are provided. The plurality of ash baffles are staggeredly distributed on both sides of the shell to form a serpentine flow channel in the shell.

[0015] The beneficial effect of the above technical solution is that the multiple ash baffles in the shell work together to achieve a better effect of fly ash settling.

[0016] In the above technical solution, the end of the dust shield away from the end connected to the inner wall of the shell is tilted downward.

[0017] The beneficial effect of the above technical solution is that it has a simple structure.

[0018] In the above technical solution, the lower end of the shell is recessed downward and closed to form the ash discharge port.

[0019] The beneficial effect of the above technical solution is that the fly ash settled in the shell can be discharged into the collection tank in a timely manner.

[0020] In the above technical solution, the collecting tank is connected to the ash discharge port by a live thread.

[0021] The beneficial effect of the above technical solution is that it makes it more convenient to disassemble and assemble the collection tank at the ash discharge port.

[0022] The collecting tank in the above technical solution is provided with a transparent window, and the transparent window is provided with a vertically arranged length scale.

[0023] The beneficial effect of the above technical solution is that the collected amount of fly ash in the collection tank can be easily known. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A vertical view of the fly ash sampling device according to an embodiment of the present utility model;

[0025] Figure 2 This is a cross-sectional view of the gas-solid separator described in an embodiment of the present utility model;

[0026] Figure 3 This is a vertical view of the gas-solid separator described in an embodiment of the present utility model;

[0027] Figure 4 This is a schematic diagram of the installation of the fly ash sampling device according to an embodiment of the present utility model on the flue;

[0028] Figure 5 This is a side view of the collection tank according to an embodiment of the present invention.

[0029] In the figure: 1. Sampling tube; 11. Sampling port; 2. Vacuum element; 3. Gas-solid separator; 31. Shell; 311. Flue gas inlet; 312. Exhaust port; 313. Ash discharge port; 32. Ash baffle; 4. Collection tank; 41. Transparent window; 42. Length scale; 5. Partition plate; 51. Tubular portion; 6. Flue. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0031] like Figure 1 and Figure 4As shown, this embodiment provides a fly ash sampling device, including a sampling tube 1, an exhaust member 2, a gas-solid separator 3 and a collecting tank 4, one end of the sampling tube 1 is inserted into the flue 6, the sampling tube 1 has a plurality of sampling ports 11 spaced and located in the flue 6, the gas-solid separator 3 has a flue gas inlet 311, an exhaust port 312 and an ash discharge port 313, the exhaust port 312 is connected to the air inlet of the exhaust member 2, the flue gas inlet 311 is connected to the other end of the sampling tube 1, the collecting tank 4 is detachably mounted at the ash discharge port 313, so that the gas-solid separator can be subjected to negative pressure treatment by the exhaust member, thereby making the sampling tube The multiple sampling ports all suck the flue gas from the flue to the gas-solid separator, and the flue gas settles the fly ash into the collection tank in the gas-solid separator, and the gaseous distribution is sucked out by the exhaust component. The fly ash sampling device is convenient for sampling. Sampling can be carried out by installing the collection tank and starting the exhaust component. Moreover, it can perform multi-point sampling in the flue with high sampling accuracy. Among them, the multiple sampling ports 11 are spaced apart on the sampling tube 1 along the length direction of the sampling tube 1. The structure is simple, and the multiple sampling points can be spaced apart in the radial direction of the flue. Specifically, the sampling ports are all tubular interfaces, and the end of the sampling tube located in the flue is also bent upward to form a sampling port.

[0032] like Figure 1 As shown, the sampling tube 1 in the above technical solution is also provided with a baffle plate 5, and the sampling tube 1 vertically passes through the baffle plate 5, and the baffle plate 5 is used to connect with the pipe wall of the flue 6. In this way, the baffle plate can be used to seal the position where the sampling tube passes through the flue, thereby preventing the smoke in the flue from leaking out.

[0033] like Figure 4 As shown, the baffle plate 5 in the above technical solution is a flange ring, and the baffle plate can be coaxially fixedly connected to the sampling tube (the two are coaxially distributed and welded to each other), or the baffle plate 5 is provided with a tubular portion 51 on the side away from the flue 6 and coaxially docked with its inner hole, and the sampling tube 1 passes through the inner hole of the baffle plate 5 and is supported at the tubular portion 51 (at this time, the sampling tube can move relative to the baffle plate to adjust its length extending into the flue, and in addition, the gap between the baffle plate and the sampling tube can be sealed and filled with mastic). Its structure is simple and makes it more convenient to install the baffle plate on the flue.

[0034] like Figure 2As shown, the gas-solid separator 3 in the above technical solution includes a shell 31 and an ash baffle 32 arranged in the shell 31, the flue gas inlet 311 is arranged on the side wall of the shell 31, and the ash baffle 32 is located above the flue gas inlet 311, the exhaust port 312 is arranged at the upper end of the shell 31, and the ash discharge port 313 is arranged at the lower end of the shell 31, and the ash baffle 32 is used to settle the fly ash in the flue gas in the shell 31, so that when the flue gas ascends in the shell, the fly ash is blocked by the ash baffle to accelerate the sedimentation of the fly ash, so that the fly ash is collected by the collection tank.

[0035] like Figure 2 and Figure 3 As shown, the shell 31 in the above technical solution is a vertically arranged flat shell, and a plurality of ash baffles 32 are provided. The plurality of ash baffles 32 are staggered on both sides of the shell 31 to form a serpentine flow channel in the shell 31, so that the multiple ash baffles in the shell work together to achieve a better effect of fly ash sedimentation. Of course, the shell adopts a flat shell, which can also make the volume of the entire gas-solid separator more compact.

[0036] In the above technical solution, the end of the dust baffle 32 away from the end connected to the inner wall of the shell 31 is tilted downward, and its structure is simple.

[0037] In the above technical solution, the lower end of the shell 31 is recessed and closed downward to form the ash discharge port 313 , so that the fly ash settled in the shell can be discharged into the collection tank in a timely manner.

[0038] Of course, the gas-solid separator 3 in this embodiment can also be directly replaced by a cyclone separator.

[0039] In the above technical solution, the collecting tank 4 is connected to the ash discharge port 313 by a hoop and a live thread, which makes it more convenient to disassemble and assemble the collecting tank at the ash discharge port.

[0040] like Figure 5 As shown, the collection tank 4 in the above technical solution has a transparent window 41 (the transparent window can be), and the transparent window 41 has a vertically arranged length scale 42, so that the collection amount of fly ash in the collection tank can be easily known.

[0041] In this embodiment, the exhaust component can be a vacuum pump. At this time, a silencer dust bag can be set at the air outlet of the exhaust component for dust filtering. Of course, the air outlet of the exhaust component can also be directly connected to the flue to form a closed loop, which can further reduce environmental pollution.

[0042] The sampling port in this embodiment is preferably oriented away from the direction of flue gas flow in the flue. This can prevent the flue gas in the flue from flowing back into the sampling tube through the sampling port and leaking out through the fly ash sampling device when fly ash sampling is not needed (of course, a valve can be provided at the air outlet of the exhaust component, which can be closed when sampling is not required).

[0043] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, based on the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A fly ash sampling device, characterized in that: The invention comprises a sampling tube (1), an air extraction member (2), a gas-solid separator (3) and a collecting tank (4); one end of the sampling tube (1) penetrates into the flue (6); the sampling tube (1) has a plurality of sampling ports (11) spaced apart and located in the flue (6); the gas-solid separator (3) has a flue gas inlet (311), an exhaust port (312) and an ash discharge port (313); the exhaust port (312) is connected to the air inlet of the air extraction member (2); the flue gas inlet (311) is connected to the other end of the sampling tube (1); and the collecting tank (4) is detachably mounted at the ash discharge port (313).

2. The fly ash sampling device according to claim 1, characterized in that: The plurality of sampling ports (11) are distributed on the sampling tube (1) at intervals along the length direction of the sampling tube (1).

3. The fly ash sampling device according to claim 1, characterized in that: A partition plate (5) is also provided on the sampling tube (1), and the sampling tube (1) vertically passes through the partition plate (5), and the partition plate (5) is used to be connected to the tube wall of the flue (6).

4. The fly ash sampling device according to claim 3, characterized in that: The partition plate (5) is a flange ring. A tubular portion (51) coaxially connected to the inner hole of the partition plate (5) is provided on the side of the partition plate (5) facing away from the flue (6). The sampling tube (1) passes through the inner hole of the partition plate (5) and is supported on the tubular portion (51).

5. The fly ash sampling device according to claim 1, characterized in that: The gas-solid separator (3) comprises a shell (31) and an ash baffle (32) arranged in the shell (31); the flue gas inlet (311) is arranged on the side wall of the shell (31), and the ash baffle (32) is located above the flue gas inlet (311); the exhaust port (312) is arranged at the upper end of the shell (31); the ash discharge port (313) is arranged at the lower end of the shell (31); and the ash baffle (32) is used to settle fly ash in the flue gas in the shell (31).

6. The fly ash sampling device according to claim 5, characterized in that: The shell (31) is a flat shell arranged vertically, and a plurality of ash baffles (32) are provided. The plurality of ash baffles (32) are staggeredly distributed on both sides of the shell (31) to form a serpentine flow channel in the shell (31).

7. The fly ash sampling device according to claim 6, characterized in that: The end of the dust shield (32) away from the end connected to the inner wall of the shell (31) is tilted downward.

8. The fly ash sampling device according to claim 6, characterized in that: The lower end of the shell (31) is recessed downward and closed to form the ash discharge port (313).

9. The fly ash sampling device according to claim 1, characterized in that: The collecting tank (4) is connected to the ash discharge port (313) via a clamping thread.

10. The fly ash sampling device according to claim 1, characterized in that: The collecting tank (4) is provided with a transparent window (41), and the transparent window (41) is provided with a length scale (42) arranged vertically.

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