Ash sampling device for electric dust remover

Abstract

The utility model relates to the technical field of sampling devices, in particular to an ash sampling device for an electric dust remover, which comprises a dust suction pipe and a dust collection tank, one end of the dust suction pipe is communicated into a dust collection hopper on the electric dust remover, the other end of the dust suction pipe is communicated with the dust collection tank, and the middle of the dust suction pipe is communicated with a sealing valve. The main body is fixedly connected to the upper end of the interior of the fixed support, the lower end of the main body is connected with a movable bottom cover, the upper end of the main body is provided with a tank opening, the interior of the tank opening is connected with a sealing plug in a sealed mode, and the interior of the sealing plug is communicated with a pressure regulating pipe and an air suction pipe. When sampling needs to be carried out, operation can be rapidly carried out, air in the dust collecting hopper and dust can be sucked into the dust collecting tank together to be collected through negative pressure only by opening the sealing valve, after sampling is completed, the sealing valve is closed, the movable bottom cover at the bottom of the dust collecting tank is rotated and taken down, and then a dust sample can be obtained from the movable bottom cover.

Description

Technical Field

[0001] This utility model relates to the field of sampling devices, specifically a dust sampling device for an electrostatic precipitator. Background Technology

[0002] Electrostatic precipitators are essential equipment in thermal power plants. Their function is to remove particulate matter from the flue gas emitted by coal-fired or oil-fired boilers, thereby significantly reducing the amount of particulate matter released into the atmosphere. This is an important environmental protection device for improving environmental pollution and air quality.

[0003] In the production process of coal-fired power plants and industrial boilers, it is necessary to sample the fly ash produced by combustion to test the combustibles in the fly ash and thus determine its carbon content. Sampling devices are typically used to take samples in the flue gas duct. However, the fly ash in the flue gas duct is some distance from the electrostatic precipitator before it reaches the precipitator.

[0004] Therefore, fly ash in flues is not representative and has little reference value.

[0005] To address the aforementioned problems, the existing technology, specifically Chinese utility model patent CN213397825U, entitled "A Dust Collection Device for an Electrostatic Precipitator and an Electrostatic Precipitator," proposes a solution. This solution involves connecting the higher end of a sampling tube to the inlet of the dome valve of the silo pump, thus applying the dust collection device to the electrostatic precipitator. When sampling is needed, simply open the first switch valve to open the sampling tube. Due to the inclined design of the sampling tube, when open, the ash sample's own gravity and its fluidity at high temperatures allow it to automatically and quickly pass through the sampling tube into the sampling bottle, achieving the purpose of obtaining the ash sample. When sampling is not needed, closing the first switch valve disconnects the sampling tube, preventing the ash sample at the dome valve inlet from entering the sampling bottle through the sampling tube. This allows sampling directly at the inlet of the electrostatic precipitator's silo pump dome valve, ensuring strong sample representativeness. Moreover, compared to existing technologies, it does not require an electrical control system to obtain gray samples, thus it has a simple structure, low cost, fewer points of failure, and is easy to maintain.

[0006] However, the existing technology still has some problems. During use, the dust needs to fall into the sampling tube by free fall, which cannot guarantee the probability of dust falling into the sampling tube and has low efficiency. Moreover, it cannot guarantee that the sample will fall into the sampling tube when sampling is needed, resulting in poor immediacy. Therefore, there is a need for a device with stronger immediacy that can quickly perform sampling when needed and ensure the efficiency of dust sampling and collection. To this end, this utility model proposes a dust sampling device for electrostatic precipitators to solve the above-mentioned problems. Utility Model Content

[0007] The purpose of this invention is to provide a dust sampling device for an electrostatic precipitator to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a dust sampling device for an electrostatic precipitator, comprising...

[0009] A suction pipe, one end of which is connected to the dust collection hopper of an electrostatic precipitator, and the other end of which is connected to a dust collection tank, with a sealing valve connected in the middle of the suction pipe; and

[0010] The dust collection tank comprises two parts, an upper part and a lower part. The upper part is the main body, which is fixedly connected to the upper part of the fixed support. The lower part of the main body is connected to a movable bottom cover. The upper part of the main body is provided with a tank opening, and a sealing plug is sealed inside the tank opening. A pressure regulating pipe and a suction pipe are connected inside the sealing plug.

[0011] Preferably, the end of the suction pipe is inclinedly connected to the dust collection hopper, and the suction pipe and the dust collection hopper are sealed and connected by a flange, forming a detachable connection. The suction pipe is a flexible pipe that can be bent, and the other end of the suction pipe is also connected to the upper end of the dust collection tank through a flange. The sealing valve connected in the middle of the suction pipe is a butterfly valve, and an opening and closing handwheel is provided on one side of the sealing valve.

[0012] Preferably, the dust collection tank has protruding fixing ears on both sides, and a sealing plug is inserted into the upper opening of the dust collection tank. The sealing plug has two sets of through holes running vertically through it. An air suction pipe is inserted into one of the through holes. The lower end of the air suction pipe is connected to the bottom of the dust collection tank, and a dust filter element is provided at the end of the air suction pipe. The other end of the air suction pipe is connected to a vacuum pump.

[0013] Preferably, a pressure regulating pipe is sealed and inserted into another through hole on the sealing plug. The lower end of the pressure regulating pipe is connected to the upper end of the dust collection tank, and the upper end of the pressure regulating pipe is connected to a solenoid valve.

[0014] Preferably, the fixed support is square plate-shaped with a circular slot in the middle. The main body of the upper part of the dust collection tank is inserted into the circular slot and fastened to the fixed support by fixing lug bolts. The four corners of the lower end of the fixed support are fixedly connected with screw legs. The screw legs include an upper sleeve and a lower screw. The screw is threaded into the sleeve. The lower end of the screw is fixedly connected with a support pad.

[0015] Preferably, the lower inner wall of the dust collection tank is provided with a threaded sleeve, a movable bottom cover is connected inside the threaded sleeve, a connector is provided at the upper end of the movable bottom cover, the connector corresponds to the threaded sleeve, the outer side is provided with threads, and is fastened to the threaded sleeve by the threads, and a number of screwing protrusions are provided on the outer side of the upper end of the movable bottom cover in a uniformly distributed annular array.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention utilizes a vacuum pump to create a vacuum inside the dust collection tank and maintain a negative pressure state. This allows for rapid sampling when needed. During sampling, simply open the sealing valve; the negative pressure draws air and dust from the dust collection hopper into the dust collection tank for collection. This method is fast and efficient. After sampling, close the sealing valve and rotate the movable bottom cover at the bottom of the dust collection tank to remove the ash sample. This results in more stable and efficient sampling, effectively improving the performance and ensuring timely sampling. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a lower structural view of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0021] In the diagram: 1. Dust collection hopper, 2. Suction pipe, 3. Sealing valve, 4. Dust collection can, 5. Fixing lug, 6. Fixing support, 7. Screw support leg, 8. Movable bottom cover, 9. Sealing plug, 10. Suction pipe, 11. Pressure regulating pipe, 12. Vacuum pump, 13. Twisting protrusion, 14. Connector. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] Example 1: Please refer to Figures 1-3 This utility model provides a technical solution: a dust sampling device for an electrostatic precipitator, comprising...

[0024] The suction pipe 2 has one end connected to the dust collection hopper 1 on the electrostatic precipitator and the other end connected to the dust collection tank 4. A sealing valve 3 is connected in the middle of the suction pipe 2.

[0025] Dust collection tank 4 includes two parts, upper and lower. The upper part is the main body, which is fixedly connected to the upper part of the fixed support 6. The lower part of the main body is connected to a movable bottom cover 8. The upper part of the main body is provided with a tank opening. A sealing plug 9 is sealed inside the tank opening. A pressure regulating pipe 11 and a suction pipe 10 are connected inside the sealing plug 9.

[0026] The suction pipe 2 is connected to the dust collection hopper 1 at an angle. The suction pipe 2 and the dust collection hopper 1 are connected by a flange seal and are detachable. The suction pipe 2 is a flexible pipe that can be bent. The other end of the suction pipe 2 is also connected to the upper end of the dust collection tank 4 through a flange. The sealing valve 3 connected in the middle of the suction pipe 2 is a butterfly valve. The sealing valve 3 is equipped with an opening and closing handwheel on one side. The sealing valve 3 in the middle of the suction pipe 2 can block the suction pipe 2. When dust sampling is required, it can maintain a sealed state and ensure that the dust collection tank 4 can be evacuated and put into a negative pressure state. When sampling is required, the sealing valve 3 can be opened to suck the dust in the dust collection hopper 1 from the suction pipe 2 into the dust collection tank 4 through negative pressure suction. This can ensure the sampling effect. Compared with the existing technology where dust falls into the sampling pipe by free fall, it is more efficient and ensures that the dust can be sucked into the dust collection tank 4, improving the timeliness of work.

[0027] Example 2: The dust collection tank 4 has protruding fixing ears 5 on both sides. The upper end of the dust collection tank 4 is sealed with a sealing plug 9. The sealing plug 9 has two sets of through holes. One of the through holes is sealed with a suction pipe 10. The lower end of the suction pipe 10 is connected to the bottom of the dust collection tank 4. A dust filter element is provided at the end of the suction pipe 10. The other end of the suction pipe 10 is connected to a vacuum pump 12. The vacuum pump 12 can evacuate the dust collection tank 4 to make it negative pressure. This makes it easy to quickly suck air and dust into the dust collection tank 4 for sampling when the sealing valve 9 is opened.

[0028] A pressure regulating pipe 11 is sealed and inserted into another through hole on the sealing plug 9. The lower end of the pressure regulating pipe 11 is connected to the upper end of the dust collection tank 4, and the upper end of the pressure regulating pipe 11 is connected to a solenoid valve. The pressure inside the dust collection tank 4 can be adjusted by the solenoid valve on the pressure regulating pipe 11, thereby roughly controlling the air intake and the amount of dust sampled. When sampling is not required, the pressure inside the dust collection tank 4 is guaranteed, and the service life of the dust collection tank 4 is avoided by being in a negative pressure state for a long time.

[0029] The fixed support 6 is square plate-shaped with a circular slot in the middle. The main body of the upper part of the dust collection tank 4 is inserted into the circular slot and fastened to the fixed support 6 by bolts with fixing ears 5. The four corners of the lower end of the fixed support 6 are fixedly connected with screw legs 7. The screw legs 7 include an upper sleeve and a lower screw. The screw is threaded into the sleeve. The lower end of the screw is fixedly connected with a support pad. The fixed support 6 can support and fix the dust collection tank 4 to maintain a stable state. The screw legs 7 can be adjusted in height according to the actual site to ensure stability. It also facilitates the installation and removal of the movable bottom cover 8 at the lower end of the dust collection tank 4, making it convenient to take out dust samples and clean the inside.

[0030] The lower inner wall of the dust collection tank 4 is provided with a threaded sleeve, and a movable bottom cover 8 is connected inside the threaded sleeve. A connector 14 is provided at the upper end of the movable bottom cover 8. The connector 14 corresponds to the threaded sleeve, and is threaded on the outside. It is fastened to the threaded sleeve by the thread. Several screwing protrusions 13 are evenly distributed in a ring array on the outer side of the upper end of the movable bottom cover 8. The movable bottom cover 8 connected by the thread facilitates installation and disassembly, improving the convenience of use and cleaning.

[0031] In actual use, the sealing valve 3 in the middle of the suction pipe 2 can block the suction pipe 2, maintaining a sealed state when dust sampling is needed. This ensures that the dust collection can 4 can be evacuated, creating an internal negative pressure state. When sampling is required, opening the sealing valve 3 allows the negative pressure suction to draw dust from the dust collection hopper 1 from the suction pipe 2 into the dust collection can 4, ensuring sampling effectiveness. Compared to existing technologies where dust falls freely into the sampling tube, this method is more efficient, ensuring dust is drawn into the dust collection can 4 and improving the immediacy of the work. The vacuum pump 12 can evacuate the dust collection can 4, creating a negative pressure state inside, facilitating the rapid intake of air and dust when the sealing valve 9 is opened. Sampling is performed inside the dust collection tank 4. The pressure inside the dust collection tank 4 can be adjusted by the solenoid valve on the pressure regulating pipe 11, thereby roughly controlling the air intake and the amount of dust sampled. When sampling is not required, the internal pressure of the dust collection tank 4 is maintained to avoid prolonged negative pressure, which would shorten the service life of the dust collection tank 4. The dust collection tank 4 can be supported and fixed by the fixed support 6 to maintain a stable state. The screw support leg 7 can be adjusted in height according to the actual site to ensure stability and facilitate the installation and removal of the movable bottom cover 8 at the bottom of the dust collection tank 4. This makes it convenient to remove dust samples and clean the inside. The movable bottom cover 8, which is connected by threads, is easy to install and remove, improving the convenience of use and cleaning.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dust sampling device for an electrostatic precipitator, characterized by: The utility model provides a dust collection device, which comprises a dust collection pipe (2) having one end connected to a dust collecting hopper (1) of an electric dust collector and the other end connected to a dust collecting tank (4), and a sealing valve (3) connected to the middle of the dust collection pipe (2). The dust collecting tank (4) comprises an upper part and a lower part, wherein the upper part is a main body fixedly connected to the inner upper end of a fixed support (6), the lower end of the main body is connected to a movable bottom cover (8), the upper end of the main body is provided with a tank opening, the tank opening is sealingly connected to a sealing plug (9), and the sealing plug (9) is connected to a pressure regulating pipe (11) and a suction pipe (10). The end of the dust collection pipe (2) is obliquely connected to the dust collecting hopper (1), the dust collection pipe (2) is sealingly connected to the dust collecting hopper (1) through flanges, the connection is detachable, the dust collection pipe (2) is a flexible pipe capable of being bent, the other end of the dust collection pipe (2) is also connected to the upper end of the dust collecting tank (4) through flanges, the sealing valve (3) connected to the middle of the dust collection pipe (2) is a butterfly valve, and the sealing valve (3) is provided with an opening and closing hand wheel on one side.

2. A dust sampling device for an electrostatic precipitator according to claim 1, characterized in that: The dust collecting tank (4) is provided with fixed ears (5) on both sides, the upper end of the dust collecting tank (4) is sealingly inserted with the sealing plug (9), two groups of through holes are formed in the sealing plug (9) in a penetrating manner from top to bottom, the suction pipe (10) is sealingly inserted into one of the through holes, the lower end of the suction pipe (10) is connected to the bottom of the dust collecting tank (4), a dustproof filter element is arranged at the end of the suction pipe (10), and the other end of the suction pipe (10) is connected to a vacuum pump (12).

3. A dust sampling device for an electrostatic precipitator according to claim 1, wherein: The other through hole in the sealing plug (9) is sealingly inserted with the pressure regulating pipe (11), the lower end of the pressure regulating pipe (11) is connected to the inner upper end of the dust collecting tank (4), and the upper end of the pressure regulating pipe (11) is connected to an electromagnetic valve.

4. A dust sampling device for an electrostatic precipitator according to claim 3, wherein: The fixed support (6) is a square plate, a circular insertion slot is formed in the middle of the fixed support (6), the main body of the upper part of the dust collecting tank (4) is inserted into the circular insertion slot, and the fixed ears (5) are bolted to the fixed support (6), the lower end of the fixed support (6) is fixedly connected to screw rod legs (7), the screw rod legs (7) comprise a sleeve at the upper end and a screw rod at the lower end, the screw rod is connected to the sleeve in a threaded manner, and the lower end of the screw rod is fixedly connected to a supporting pad.

5. A dust sampling device for an electrostatic precipitator according to claim 1, wherein: The inner wall of the lower end of the main body of the dust collecting tank (4) is provided with a threaded sleeve, the movable bottom cover (8) is connected to the threaded sleeve, the upper end of the movable bottom cover (8) is provided with a connecting head (14), the connecting head (14) corresponds to the threaded sleeve, is provided with threads on the outer side, and is fastened to the threaded sleeve in a threaded manner, and a plurality of screw protrusions (13) are uniformly distributed in an annular array and protrude from the outer side of the upper end of the movable bottom cover (8).

6. A dust sampling device for an electrostatic precipitator according to claim 1, wherein: ​

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