Boiler fly ash sampling device

Abstract

The utility model provides a boiler fly ash sampling device which comprises a sampling barrel, an air inlet pipe, an air exhaust pipe, a filter screen ash removal mechanism and an ash inlet amount control pipe, the sampling barrel is provided with a first air inlet channel and a first air exhaust channel, a sampling bottle is arranged at the bottom of the sampling barrel, and the first air inlet channel is communicated with the first air exhaust channel. A filter screen is arranged at one end, positioned in the sampling barrel, of the first air exhaust channel; the air inlet pipe is connected with the first air inlet channel, and the air exhaust pipe is connected with the first air exhaust channel; the filter screen deashing mechanism is used for deashing the filter screen; and the ash inlet amount control pipe is used for controlling the ash inlet amount. According to the technical scheme, the sampling efficiency and the sampling precision are improved.

Description

Technical Field

[0001] This application relates to the field of boiler fly ash sampling technology, and in particular to a boiler fly ash sampling device. Background Technology

[0002] In thermal power plants, accurate detection of carbon content in boiler fly ash is crucial for the scientific calculation of boiler thermal efficiency. However, existing fly ash sampling devices have many problems. Traditional impact samplers and sedimentation samplers are no longer sufficient to meet the sampling accuracy and efficiency requirements of modern power plants. Some sampling devices are prone to fly ash clogging of the filter screen during sampling, causing the air pump to fail to extract air smoothly and affecting sampling efficiency. Moreover, some devices have uncontrollable sampling volume and poor sampling integrity, failing to guarantee the representativeness of the sample. For example, in flue ducts, when the fly ash flow rate is inconsistent with the fly ash flow rate in the sampling gun, the sampling results are not representative. Therefore, developing a new type of boiler fly ash sampling device is of significant practical importance. Utility Model Content

[0003] This application provides a boiler fly ash sampling device to improve sampling efficiency and sampling accuracy.

[0004] This application provides a boiler fly ash sampling device, comprising: a sampling bucket, an air inlet pipe, an air extraction pipe, a filter cleaning mechanism, and an ash inlet control pipe, wherein...

[0005] The sampling bucket is equipped with a first air inlet channel and a first air extraction channel.

[0006] A sampling bottle is provided at the bottom of the sampling barrel, and a filter screen is provided at one end of the first air extraction channel inside the sampling barrel.

[0007] The air intake pipe is connected to the first air intake channel, and the air extraction pipe is connected to the first air extraction channel;

[0008] The filter cleaning mechanism is used to clean the filter screen.

[0009] The ash feed control tube is used to control the ash feed rate.

[0010] In the above technical solution, by setting up a sampling bucket, an air inlet pipe, an air extraction pipe, a filter cleaning mechanism, and an ash inlet control pipe, the sampling bucket is provided with a first air inlet channel and a first air extraction channel, and a sampling bottle is provided at the bottom of the sampling bucket. A filter is provided at one end of the first air extraction channel located inside the sampling bucket; the air inlet pipe is connected to the first air inlet channel, and the air extraction pipe is connected to the first air extraction channel; the filter cleaning mechanism is used to clean the filter; and the ash inlet control pipe is used to control the ash inlet amount; thus improving sampling efficiency and sampling accuracy.

[0011] In one specific implementation scheme, the filter cleaning mechanism includes a first mounting block, an impeller, and a cleaning plate, wherein,

[0012] The first mounting block is provided with a second air extraction channel, which is connected to the first air extraction channel;

[0013] The impeller is disposed within the second air extraction channel;

[0014] The impeller is used to drive the dust removal plate.

[0015] In one possible implementation, the first mounting block is fixedly connected to the side wall of the sampling bucket.

[0016] In one specific implementation, the impeller is rotatably connected to the first mounting block via a rotating shaft.

[0017] In one specific implementation, the dust removal plate is located inside the sampling bucket and is positioned opposite to the filter screen.

[0018] In one possible implementation, the rotating shaft is rotatably connected to the sampling bucket;

[0019] A crank-connecting rod mechanism is provided on the rotating shaft.

[0020] The crank-connecting rod mechanism is connected to the cleaning plate and is used to drive the cleaning plate to reciprocate up and down.

[0021] In one specific implementation, the ash inlet control pipe is connected to the air inlet pipe;

[0022] The ash inlet control pipe is equipped with a baffle mechanism for adjusting the fly ash flow rate.

[0023] In one possible implementation, the extraction pipe is used to connect to an extraction pump.

[0024] In one specific implementation, a return spring is provided between the dust removal plate and the sampling bucket.

[0025] In one specific implementation, the bottom of the sampling bucket is detachably connected to the body of the sampling bucket via threads. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the boiler fly ash sampling device provided in the embodiments of this application.

[0027] Among them, 1-sampling bucket, 2-air inlet pipe, 3-extraction pipe, 4-crank connecting rod mechanism, 5-return spring, 6-first air inlet channel, 7-first extraction channel, 8-sampling bottle, 9-filter screen, 10-ash inlet control pipe, 11-baffle mechanism, 12-first mounting block, 13-impeller, 14-ash cleaning plate, 15-second extraction channel, 16-rotating shaft. Detailed Implementation

[0028] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present application will become clearer and more apparent.

[0029] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0030] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0031] To facilitate understanding of the boiler fly ash sampling device provided in this application embodiment, its application scenario will be explained first. The boiler fly ash sampling device provided in this application embodiment is used to improve sampling efficiency and accuracy. In thermal power plants, accurate detection of the carbon content in boiler fly ash is crucial for the scientific calculation of boiler thermal efficiency. However, existing fly ash sampling devices have many problems. Traditional impact samplers and accumulation samplers are no longer sufficient to meet the requirements of modern power plants for sampling accuracy and efficiency. Some sampling devices are prone to fly ash clogging the filter screen during sampling, causing the air pump to fail to extract air smoothly, affecting sampling efficiency. Moreover, some devices have uncontrollable sampling volume and poor sampling integrity, failing to guarantee the representativeness of the sample. For example, in flue ducts, when the fly ash flow rate is inconsistent with the fly ash flow rate in the sampling gun, the sampling results are not representative. Therefore, developing a new type of boiler fly ash sampling device has important practical significance. To this end, this application embodiment provides a boiler fly ash sampling device to improve sampling efficiency and accuracy. The following detailed description, in conjunction with specific accompanying drawings, illustrates the device in detail.

[0032] refer to Figure 1 , Figure 1 This is a schematic diagram of the boiler fly ash sampling device provided in the embodiments of this application.

[0033] exist Figure 1 This application provides a boiler fly ash sampling device, including: a sampling bucket 1, an air inlet pipe 2, an air extraction pipe 3, a filter cleaning mechanism, and an ash inlet control pipe 10.

[0034] The sampling bucket is equipped with a first air inlet channel 6 and a first air extraction channel 7.

[0035] A sampling bottle 8 is provided at the bottom of the sampling barrel, and a filter screen 9 is provided at one end of the first air extraction channel located inside the sampling barrel.

[0036] The air intake pipe is connected to the first air intake channel, and the air extraction pipe is connected to the first air extraction channel;

[0037] The filter cleaning mechanism is used to clean the filter screen.

[0038] The ash feed control tube is used to control the ash feed rate.

[0039] In the above technical solution, by setting up a sampling bucket, an air inlet pipe, an air extraction pipe, a filter cleaning mechanism, and an ash inlet control pipe, the sampling bucket is provided with a first air inlet channel and a first air extraction channel, and a sampling bottle is provided at the bottom of the sampling bucket. A filter is provided at one end of the first air extraction channel located inside the sampling bucket; the air inlet pipe is connected to the first air inlet channel, and the air extraction pipe is connected to the first air extraction channel; the filter cleaning mechanism is used to clean the filter; and the ash inlet control pipe is used to control the ash inlet amount; thus improving sampling efficiency and sampling accuracy.

[0040] Specifically, the beneficial effects of the boiler fly ash sampling device include:

[0041] Improve sampling efficiency

[0042] Rapid fly ash collection: The device is equipped with an air inlet pipe, an air extraction pipe, and a first air inlet channel and a first air extraction channel inside the sampling container. During the sampling process, the suction effect of the air extraction pipe creates a negative pressure inside the sampling container, causing the fly ash in the boiler flue to quickly enter the sampling container along the air inlet pipe and the first air inlet channel. This efficient airflow design significantly shortens the fly ash collection time. Compared with traditional sampling methods, it can obtain a sufficient amount of fly ash sample in a shorter time, improving the efficiency of the sampling work.

[0043] Automated processes simplify operation: The overall design of the device is reasonable, and all components work together to form a relatively automated sampling process. Operators only need to connect the corresponding pipelines and start the equipment to automatically complete the extraction and collection of fly ash, eliminating the need for excessive and tedious manual operations. This not only reduces manpower input but also avoids problems such as prolonged sampling time or sampling failures caused by improper manual operation, further improving sampling efficiency.

[0044] Improve sampling accuracy

[0045] A filter screen ensures sample purity: A filter screen is installed at one end of the first air extraction channel inside the sampling bucket. This design plays a crucial filtering role. When fly ash enters the sampling bucket with the airflow, the filter screen effectively intercepts the fly ash while allowing gas to pass through. This ensures that the collected fly ash sample is free of other impurities, such as dust particles and foreign objects from the flue, guaranteeing the purity of the fly ash sample. A pure sample can more accurately reflect the true condition of boiler fly ash, providing a reliable data foundation for subsequent analysis and research, thereby improving sampling accuracy.

[0046] Precise adjustment of the ash inlet control tube: The ash inlet control tube allows operators to precisely control the amount of fly ash entering the sampling bin according to actual needs. During sampling, adjusting the ash inlet control tube can prevent the accuracy of sampling results from being affected by too much or too little fly ash. For example, in some experiments or tests with strict requirements on fly ash content, precise control of the fly ash amount makes the sampling results more consistent with actual needs, greatly improving the accuracy and reliability of sampling.

[0047] Ensure stable equipment operation and extend its lifespan

[0048] Filter cleaning mechanism reduces clogging: The filter plays a crucial role in intercepting fly ash during sampling. However, as fly ash accumulates, the filter is prone to clogging, affecting sampling efficiency and even causing equipment failure. The filter cleaning mechanism equipped in this device can clean the filter in a timely manner, maintaining its permeability and ensuring smooth passage of air and fly ash. This avoids equipment malfunctions caused by filter clogging and guarantees the stable operation of the device.

[0049] Enhancing data reliability and usability

[0050] Accurately reflecting boiler operating conditions: Due to improved sampling efficiency and precision, the obtained fly ash samples can more accurately reflect the characteristics of fly ash during boiler combustion, such as key indicators like particle size distribution and carbon content. This accurate data is crucial for evaluating boiler combustion efficiency, adjusting combustion parameters, and optimizing boiler operation, providing strong support for energy conservation, emission reduction, and efficient boiler operation.

[0051] In one specific implementation scheme, the filter cleaning mechanism includes a first mounting block 12, an impeller 13, and a cleaning plate 14, wherein,

[0052] The first mounting block is provided with a second air extraction channel 15, which is connected to the first air extraction channel;

[0053] The impeller is disposed within the second air extraction channel;

[0054] The impeller is used to drive the dust removal plate.

[0055] Specifically, the beneficial effects include: utilizing the airflow to drive the impeller in the second extraction channel, eliminating the need for an additional power source, thus saving energy and increasing efficiency. The impeller rotation drives the cleaning plate to work, which can promptly remove fly ash from the filter screen, preventing filter screen blockage, ensuring smooth airflow in the sampling bucket, ensuring continuous and stable fly ash sampling, maintaining sampling efficiency and accuracy, extending filter screen life, and reducing maintenance costs.

[0056] In one possible implementation, the first mounting block is fixedly connected to the side wall of the sampling bucket.

[0057] Specifically, the beneficial effects include: First, the structure is robust, effectively resisting airflow impact and vibration during sampling, ensuring stable operation of all components. Second, it facilitates overall layout, reduces space occupation, and makes the device more compact. Third, it promotes airflow conduction, ensuring smooth connection between the second and first extraction channels, guaranteeing the normal operation of the filter cleaning mechanism, and thus maintaining the efficient and stable operation of the fly ash sampling device.

[0058] In one possible implementation, the impeller is rotatably connected to the first mounting block via a rotating shaft 16.

[0059] Specifically, the beneficial effects include: the rotating shaft enables the impeller to rotate around the first mounting block, resulting in a simple and reliable structure that allows the impeller to rotate stably and flexibly under the action of the suction airflow. Smooth rotation efficiently drives the cleaning plate, promptly cleaning the filter screen and preventing clogging, ensuring smooth airflow within the sampling bucket, maintaining normal fly ash sampling, improving sampling efficiency and accuracy, and facilitating later maintenance and component replacement, thus reducing maintenance costs.

[0060] In one specific implementation, the dust removal plate is located inside the sampling bucket and is positioned opposite to the filter screen.

[0061] Specifically, the beneficial effects include: the cleaning plate and the filter screen are positioned opposite each other, and when the impeller drives the cleaning plate to move, it can directly and accurately clean the filter screen, effectively removing the fly ash accumulated on the filter screen and preventing filter screen blockage. This ensures smooth airflow within the sampling bucket, ensuring continuous and stable fly ash sampling, maintaining high sampling efficiency and accuracy, reducing sampling interruptions or errors caused by filter screen blockage, and improving the overall performance of the device.

[0062] In one possible implementation, the rotating shaft is rotatably connected to the sampling bucket;

[0063] A crank-connecting rod mechanism 4 is provided on the rotating shaft.

[0064] The crank-connecting rod mechanism is connected to the cleaning plate and is used to drive the cleaning plate to reciprocate up and down.

[0065] Specifically, the beneficial effects include: the rotating shaft is rotatably connected to the sampling bucket and has a crank-connecting rod mechanism, which converts the rotation of the shaft into the up-and-down reciprocating motion of the cleaning plate. This motion allows the cleaning plate to thoroughly and efficiently clean the filter screen, avoiding cleaning dead corners and ensuring filter screen permeability. This maintains stable airflow within the sampling bucket, ensuring a continuous and stable entry of fly ash, improving sampling efficiency and accuracy, extending filter screen lifespan, and reducing maintenance costs.

[0066] In one specific implementation, the ash inlet control pipe is connected to the air inlet pipe;

[0067] The ash inlet control pipe is equipped with a baffle mechanism 11 for adjusting the fly ash flow rate.

[0068] Specifically, the beneficial effects include: the connection between the ash inlet control pipe and the air inlet pipe facilitates the regulation of the fly ash flow rate entering the sampling container. The internal baffle mechanism allows for flexible adjustment of the fly ash flow rate, enabling operators to precisely control the ash inlet amount according to actual needs, avoiding excessive or insufficient ash that could affect sampling results. This improves the accuracy and reliability of sampling, better meeting the fly ash requirements of different experiments or tests, and providing high-quality samples for subsequent analysis.

[0069] In one possible implementation, the extraction pipe is used to connect to an extraction pump.

[0070] Specifically, the beneficial effects include: the connection between the extraction pipe and the extraction pump creates a stable negative pressure environment, efficiently extracting gas from the sampling container and rapidly drawing in fly ash, significantly improving sampling efficiency. Simultaneously, precise negative pressure control helps stabilize the fly ash flow rate, ensuring accurate sampling volume and improving sampling precision. Furthermore, this connection method is simple in structure, easy to operate, and facilitates maintenance and replacement, reducing operating costs and improving the overall performance of the device.

[0071] In one specific implementation scheme, a return spring 5 is provided between the dust removal plate and the sampling bucket.

[0072] Specifically, the beneficial effects include: the return spring plays a role between the cleaning plate and the sampling bucket. After the cleaning plate moves under the drive of the crank-connecting rod mechanism, the return spring helps it to quickly return to its original position, ensuring that the cleaning plate moves continuously and rhythmically, effectively cleaning the filter screen. At the same time, it can buffer the impact force during the movement of the cleaning plate, reduce component wear, extend the service life of the device, and maintain the stability of the cleaning action, ensuring the smooth progress of sampling.

[0073] In one specific implementation, the bottom of the sampling bucket is detachably connected to the body of the sampling bucket via threads.

[0074] Specifically, the beneficial effects include: the bottom of the sampling bucket is detachably connected to the body via threads, facilitating regular cleaning of accumulated ash inside the bucket and preventing fly ash buildup from affecting sampling. After sampling, the bottom can be easily removed to retrieve the fly ash sample, making operation convenient. Furthermore, if the bucket body or bottom is damaged, it can be replaced individually, reducing maintenance costs, improving the practicality and economy of the device, and extending its overall service life.

[0075] Specifically, the working process of the boiler fly ash sampling device is as follows: When fly ash sampling is required, the sampling bucket is connected to the boiler through the first air inlet channel. The suction pump is started, and the air inside the sampling bucket is extracted from the first suction channel, while the gas inside the boiler enters the sampling bucket through the first air inlet channel. The filter screen set in the first suction channel can block the fly ash in the air, preventing the fly ash from moving out of the sampling bucket from the first suction channel. The blocked fly ash will fall into the sampling bottle located at the bottom of the sampling bucket under its own gravity. At the same time, when the suction pump extracts the air inside the sampling bucket from the first suction channel, the gas will flow in the second suction channel, driving the impeller to rotate. The rotation of the impeller drives the cleaning plate to reciprocate to clean the fly ash on the filter screen, reducing the fly ash accumulated on the filter screen and preventing fly ash from clogging the filter screen. Furthermore, by adjusting the baffle mechanism in the ash inlet control pipe, the amount of fly ash entering the sampling chamber is controlled, so as to achieve controllable sampling volume. After a certain amount of fly ash falls into the sampling bottle, the sampling bottle and sampling container can be separated to test the fly ash inside the sampling bottle.

[0076] The specific structure and control method of the controller are well-known technologies and will not be elaborated here.

[0077] Those skilled in the art will know that this application can be implemented as a system, method, or computer program product.

[0078] Therefore, this disclosure can be implemented in the following forms: it can be entirely hardware, entirely software (including firmware, resident software, microcode, etc.), or a combination of hardware and software, generally referred to herein as a "circuit," "module," or "system." Furthermore, in some embodiments, this application can also be implemented as a computer program product in one or more computer-readable media, which contains computer-readable program code.

[0079] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0080] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application. Based on this, various substitutions and improvements can be made to this application, all of which fall within the protection scope of this application.

Claims

1. A boiler fly ash sampling device, characterized in that, Includes: sampling bucket, air inlet pipe, air extraction pipe, filter cleaning mechanism, and ash inlet control pipe, among which, The sampling bucket is equipped with a first air inlet channel and a first air extraction channel. A sampling bottle is provided at the bottom of the sampling barrel, and a filter screen is provided at one end of the first air extraction channel inside the sampling barrel. The air intake pipe is connected to the first air intake channel, and the air extraction pipe is connected to the first air extraction channel; The filter cleaning mechanism is used to clean the filter screen. The ash feed control tube is used to control the ash feed rate.

2. The boiler fly ash sampling device according to claim 1, characterized in that, The filter cleaning mechanism includes a first mounting block, an impeller, and a cleaning plate, wherein... The first mounting block is provided with a second air extraction channel, which is connected to the first air extraction channel; The impeller is disposed within the second air extraction channel; The impeller is used to drive the cleaning plate.

3. The boiler fly ash sampling device according to claim 2, characterized in that, The first mounting block is fixedly connected to the side wall of the sampling bucket.

4. The boiler fly ash sampling device according to claim 3, characterized in that, The impeller is rotatably connected to the first mounting block via a rotating shaft.

5. The boiler fly ash sampling device according to claim 4, characterized in that, The dust removal plate is located inside the sampling bucket and is positioned opposite to the filter screen.

6. The boiler fly ash sampling device according to claim 5, characterized in that, The rotating shaft is rotatably connected to the sampling bucket; A crank-connecting rod mechanism is provided on the rotating shaft. The crank-connecting rod mechanism is connected to the cleaning plate and is used to drive the cleaning plate to reciprocate up and down.

7. The boiler fly ash sampling device according to claim 6, characterized in that, The ash inlet control pipe is connected to the air inlet pipe; The ash inlet control pipe is equipped with a baffle mechanism for adjusting the fly ash flow rate.

8. The boiler fly ash sampling device according to claim 7, characterized in that, The extraction pipe is used to connect to the extraction pump.

9. The boiler fly ash sampling device according to claim 8, characterized in that, A return spring is provided between the dust removal plate and the sampling bucket.

10. The boiler fly ash sampling device according to claim 9, characterized in that, The bottom of the sampling bucket is detachably connected to the body of the sampling bucket via threads.

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