A flue gas particulate matter sampling system

Abstract

This application provides a flue gas particulate matter sampling system, comprising a sampling head, a first sampling bend, a sampling straight pipe, a first connecting pipe, a second sampling bend, and a second connecting pipe sequentially connected to an automatic sampler. The first sampling bend includes a first bend body, one end of which is connected to the sampling head, and the other end of which is connected to one end of the sampling straight pipe. The second sampling bend includes a second bend body, a filter membrane, and a gasket, one end of which is connected to the other end of the first connecting pipe. The other end of the second bend body, the filter membrane, and the gasket are sequentially arranged, with a sealing ring located at the edge of the other end of the second bend body, the filter membrane, and the gasket. The sealing ring securely connects the other end of the second bend body, the filter membrane, and the gasket. This application, by placing a sampling straight pipe and a first connecting pipe between the first and second sampling bends, reduces the risk of melting of the second sampling bend due to excessively high flue gas particulate matter temperatures, thus protecting the second sampling bend.

Description

Technical Field

[0001] This application relates to the field of environmental monitoring technology, and in particular to a flue gas particulate matter sampling system. Background Technology

[0002] Studies show that in northern my country, the consumption of loose coal may reach hundreds of millions of tons. Household stoves employ virtually no pollution control measures, directly releasing gaseous pollutants from coal combustion into the atmosphere. This poses a more direct and significant threat to air quality and human health than industrial sources with the same emission levels. Effectively collecting particulate matter from stove emissions is crucial for environmental pollution monitoring, pollution prevention and control, and the development of emission standards for air pollutants from stoves.

[0003] Currently, particulate matter in flue gas is mainly collected using a sampling rod. However, when the temperature of the particulate matter in the flue gas is too high, the sampling rod may melt, making it impossible to collect the particulate matter. Utility Model Content

[0004] This application provides a flue gas particulate matter sampling system to solve the problem that the sampling rod melts due to the excessively high temperature of the flue gas particulate matter, making it impossible to collect flue gas particulate matter.

[0005] To address the aforementioned technical problems, the embodiments of this application disclose the following technical solutions:

[0006] A flue gas particulate matter sampling system includes a sampling head, a first sampling bend, a sampling straight pipe, a first connecting pipe, a second sampling bend, a second connecting pipe, and an automatic sampler. The sampling head is connected to one end of the first sampling bend, the other end of the first sampling bend is connected to one end of the sampling straight pipe, the other end of the sampling straight pipe is connected to one end of the first connecting pipe, the other end of the first connecting pipe is connected to one end of the second sampling bend, the other end of the second sampling bend is connected to one end of the second connecting pipe, and the other end of the second connecting pipe is connected to the automatic sampler.

[0007] The first sampling bend includes a first bend body, one end of the first bend body is connected to the sampling head, and the other end of the first bend body is connected to one end of the sampling straight tube;

[0008] The second sampling bend includes a second bend body, a filter membrane, a gasket, and a sealing ring. One end of the second bend body is connected to the other end of the first connecting tube. The other end of the second bend body, the filter membrane, and the gasket are arranged sequentially. The sealing ring is located at the edge of the other end of the second bend body, the filter membrane, and the gasket. The sealing ring is used to fix the other end of the second bend body, the filter membrane, and the gasket together.

[0009] Optionally, the first sampling bend is detachably connected to the sampling head.

[0010] Optionally, it also includes a pitot tube and a protective sleeve, the pitot tube being connected to the automatic sampler, the pitot tube and the sampling straight tube passing through the protective sleeve, and the second sampling bend being located on the rear side of the protective sleeve.

[0011] Optionally, the second bend body includes a first connector, which is connected to the filter membrane via the sealing ring. The right view of the first connector is circular, the right view of the filter membrane is circular, and the radius of the filter membrane is larger than the radius of the first connector.

[0012] Optionally, a second connector is provided at one end of the second connecting tube. The left view of the second connector is circular, and the radius of the second connector is larger than the radius of the first connector.

[0013] Beneficial Effects: This application provides a flue gas particulate matter sampling system, including a sampling head, a first sampling bend, a sampling straight pipe, a first connecting pipe, a second sampling bend, a second connecting pipe, and an automatic sampler. The sampling head can collect flue gas particulate matter inside the stove. The sampling head is connected to the first sampling bend, the other end of the first sampling bend is connected to one end of the sampling straight pipe, the other end of the sampling straight pipe is connected to one end of the first connecting pipe, the other end of the first connecting pipe is connected to one end of the second sampling bend, the other end of the second sampling bend is connected to one end of the second connecting pipe, and the other end of the second connecting pipe is connected to the automatic sampler. This allows the flue gas particulate matter collected by the sampling head to sequentially pass through the first sampling bend, the sampling straight pipe, the first connecting pipe, the second sampling bend, and the second connecting pipe into the automatic sampler. The automatic sampler can analyze the composition and content of each component of the collected flue gas particulate matter. The sampling head, the first sampling bend, the sampling straight pipe, the first connecting pipe, and the second sampling bend can form a sampling rod. The first sampling bend includes a first bend body, one end of which is connected to a sampling head, and the other end of which is connected to one end of a sampling straight tube. The second sampling bend includes a second bend body, a filter membrane, a gasket, and a sealing ring. One end of the second bend body is connected to the other end of a first connecting tube. The other end of the second bend body, the filter membrane, and the gasket are sequentially arranged. The sealing ring is located at the edge of the other end of the second bend body, the filter membrane, and the gasket, and is used to securely connect the other end of the second bend body, the filter membrane, and the gasket. In the first sampling bend inside the furnace, there is no filter membrane, gasket, or sealing ring, and the temperature of the flue gas particles inside the furnace does not exceed the melting point of the first sampling bend. In the second sampling bend, there is a filter membrane, gasket, and sealing ring, and the temperature of the flue gas particles inside the furnace exceeds the melting point of the second sampling bend. A sampling straight pipe and a first connecting pipe are installed between the second sampling bend and the first sampling bend. After the flue gas particles pass through the first sampling bend, the sampling straight pipe, and the first connecting pipe, their temperature decreases, ensuring that the temperature of the particles entering the second sampling bend does not exceed the melting point of the second sampling bend. This reduces the risk of the second sampling bend melting due to excessively high flue gas particle temperature inside the furnace, thus protecting the second sampling bend and allowing the sampling rod to collect excessively hot flue gas particles. In this application, by installing a sampling straight pipe and a first connecting pipe between the first and second sampling bends, the melting of the second sampling bend due to excessively high flue gas particle temperature inside the furnace can be reduced, allowing the sampling rod to collect excessively hot flue gas particles. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This application provides a schematic diagram of the structure of a flue gas particulate matter sampling system.

[0016] Figure 2 This is a partial structural schematic diagram of a flue gas particulate matter sampling system provided in this application;

[0017] Figure 3 A partial cross-sectional view of a flue gas particulate matter sampling system provided in this application;

[0018] Figure description: 1-First sampling bend, 2-Sampling straight tube, 3-First connecting tube, 4-Second sampling bend, 5-Second connecting tube, 6-Automatic sampler, 7-Pitto tube, 8-Protective sleeve, 9-Sampling head, 41-Bend body, 42-Filter membrane, 43-Gasket, 44-Sealing ring, 411-First connector, 51-Second connector, 81-Through hole for placing objects. Detailed Implementation

[0019] To facilitate the explanation of the technical solution of this application, some concepts involved in this application will be explained first below.

[0020] Figure 1 This is a schematic diagram of the structure of a flue gas particulate matter sampling system provided in this application. Figure 2 This is a partial structural schematic diagram of a flue gas particulate matter sampling system provided in this application. Figure 3 This is a partial cross-sectional view of a flue gas particulate matter sampling system provided in this application. Figure 1 , Figure 2 and Figure 3 As shown, this application provides a flue gas particulate matter sampling system. This system can be used to collect both ultra-high temperature flue gas particulate matter and non-ultra-high temperature flue gas particulate matter. Ultra-high temperature flue gas particulate matter refers to flue gas particulate matter with a temperature between 1000℃ and 1300℃, while non-ultra-high temperature flue gas particulate matter refers to flue gas particulate matter with a temperature below 1000℃.

[0021] In some embodiments, the flue gas particulate matter sampling system may include a sampling head 9, a first sampling bend 1, a sampling straight pipe 2, a first connecting pipe 3, a second sampling bend 4, a second connecting pipe 5, and an automatic sampler 6. The sampling head 9 can be placed inside the stove to collect flue gas particulate matter within the stove. One end of the sampling head 9 can be connected to the first sampling bend 1, the other end of the first sampling bend 1 can be connected to one end of the sampling straight pipe 2, the other end of the sampling straight pipe 2 can be connected to one end of the first connecting pipe 3, the other end of the first connecting pipe 3 can be connected to the second sampling bend 4, the other end of the second sampling bend 4 can be connected to one end of the second connecting pipe 5, and the other end of the second connecting pipe 5 can be connected to the automatic sampler 6. This allows the flue gas particulate matter collected by the sampling head 9 to sequentially pass through the first sampling bend 1, the sampling straight pipe 2, the first connecting pipe 3, the second sampling bend 4, and the second connecting pipe 5 into the automatic sampler 6. The automatic sampler 6 can analyze the composition and content of each component of the collected flue gas particulate matter.

[0022] In some embodiments, the first sampling bend 1 may include a first bend body 11, one end of which is connected to the sampling head, and the other end of which is connected to one end of the sampling straight tube 2.

[0023] The material of the first bend body 11 of the first sampling bend 1 can be a high-temperature resistant material, so that the flue gas particles in the furnace can directly enter the first sampling bend 1 without causing the first sampling bend 1 to melt. For example, the material of the first bend body 11 can be a titanium alloy, and the melting point of the first sampling bend 1 can be greater than 1400°C.

[0024] The sampling straight tube 2 is a rigid tube. The material of the sampling straight tube 2 can be a high-temperature resistant material, so that the flue gas particles in the furnace will not melt when they enter the sampling straight tube 2 through the first sampling bend 1. For example, the material of the sampling straight tube 2 can be a titanium alloy, so that the melting point of the sampling straight tube 2 can be greater than 1400°C.

[0025] The length of the sampling straight pipe 2 is greater than a preset value, so that the temperature of the flue gas particles inside the furnace has cooled down after passing through the sampling head 9, the first sampling bend 1, and the sampling straight pipe 2. For example, the preset value is 1m.

[0026] In some embodiments, the first sampling bend 1 and the sampling straight tube 2 may be an integrally formed structure.

[0027] In some embodiments, the first sampling bend 1 and the sampling straight tube 2 can be connected by a connecting device to ensure the sealing and stability of the connection. The connecting device can be a connecting valve or a snap-fit ​​structure.

[0028] Since the other end of the sampling straight tube 2 is set in the horizontal direction, and one end of the second sampling bend tube 4 is set in the vertical direction, the first connecting tube 3 is a flexible tube to facilitate the connection between the sampling straight tube 2 and the second sampling bend tube 4. For example, the material of the first connecting tube 3 can be Teflon polytetrafluoroethylene.

[0029] In some embodiments, the first sampling bend 1 and the sampling straight tube 2 can be connected by a first connecting tube 3 and the sampling straight tube 2. The second sampling bend 4 can be connected by a first connecting tube 3.

[0030] In some embodiments, the second sampling bend 4 may include a second bend body 41, a filter membrane 42, a gasket 43, and a sealing ring 44, wherein the second bend body 41, filter membrane 42, and gasket 43 are arranged sequentially, and the sealing ring 44 may be located at the edge of the second bend body 41, filter membrane 42, and gasket 43. The filter membrane 42 can filter larger flue gas particles. The gasket 43 can protect the filter membrane 42 and prevent the filter membrane 42 from being damaged due to the flow resistance of flue gas particles. The sealing ring 44 is used to fix the second bend body 41, filter membrane 42, and gasket 43 together.

[0031] The middle of the sealing ring 44 is in contact with the other end of the second bend body 41, the filter membrane 42 and the edge of the gasket 43. One end of the sealing ring 44 is pressed into the middle of the other end of the second bend body 41, and the other end of the sealing ring 44 is pressed into the middle of the gasket 43, so that the sealing ring 44 fixes the second bend body 41, the filter membrane 42 and the gasket 43.

[0032] The material of the second sampling bend 41 can be titanium alloy, the material of the filter membrane 42 can be quartz or glass fiber, the material of the gasket 43 can be stainless steel, and the material of the sealing ring 44 can be aluminum. Since aluminum has a melting point of approximately 600℃, the lowest melting point of the second sampling bend 4 is also approximately 600℃, making it lower than the temperature of the flue gas particles inside the furnace. If the second sampling bend 4 is placed between the sampling straight pipe 2 and the sampling head 9 (i.e., to the left of the sampling straight pipe 2), the temperature of the flue gas particles inside the furnace may cause the second sampling bend 4 to melt. However, since the length of the sampling straight pipe 2 meets the preset value (the length of the sampling straight pipe 2 is greater than the preset value), the temperature of the flue gas particles inside the furnace has already cooled down after passing through the sampling head 9, the first sampling bend 1, and the sampling straight pipe 2. Therefore, placing the second sampling bend 4 to the right of the sampling straight pipe 2 (i.e., connected to the first connecting pipe 3 on the right side of the sampling straight pipe 2) prevents the temperature of the flue gas particles entering the second sampling bend 4 from melting, thus protecting the second sampling bend 4.

[0033] In some embodiments, the first sampling bend 1 is detachably connected to the sampling head 9, so that the first sampling bend 1 can be connected to sampling heads 9 of different sizes to meet the sampling requirements of flue gas particles of different sizes.

[0034] The inner wall of the first sampling bend 1 is provided with an internal thread, and the outer wall of the sampling head 9 is provided with an external thread. The external thread is connected to the internal thread so that the first sampling bend 1 and the sampling head 9 can be detachably connected.

[0035] The sampling head 9 is snapped into the first sampling bend 1 so that the first sampling bend 1 and the sampling head 9 can be detachably connected.

[0036] The design of the first sampling bend 1 and the second sampling bend 4 both take into account the smooth flow of flue gas particles. Their smooth inner walls reduce the resistance of flue gas particles during the flow process and improve the efficiency and accuracy of sampling.

[0037] In some embodiments, the flue gas particulate matter sampling system further includes a pitot tube 7, one end of which can be installed inside the furnace to collect the instantaneous total pressure and static pressure of the flue gas particulate matter inside the furnace. The other end of the pitot tube 7 can be connected to an automatic sampler 6, so that the automatic sampler 6 can calculate and adjust the sampling flow rate in a timely manner based on the instantaneous total pressure and static pressure collected by the pitot tube 7 to maintain isokinetic sampling.

[0038] In some embodiments, the flue gas particulate matter sampling system further includes a protective sleeve 8. The protective sleeve 8 has a through hole 81 inside, and the Pitot tube 7 and the sampling straight tube 2 are disposed in the through hole 81 so that the Pitot tube 7 and the sampling straight tube 2 pass through the protective sleeve to protect the Pitot tube 7 and the sampling straight tube 2.

[0039] The protective sleeve 8 can be made of a high-temperature resistant material so that it can be inserted into the furnace without being damaged. For example, the protective sleeve 8 can be made of titanium alloy.

[0040] When sampling using the flue gas particulate matter sampling system, one end of the protective sleeve 8 is inserted into the furnace, and the second sampling bend 4 is located behind the protective sleeve 8 (i.e., the other end of the protective sleeve 8). This can prevent the second sampling bend 4 from melting due to high temperature, thereby protecting the second sampling bend 4.

[0041] In some embodiments, the second bend body 41 includes a first connector 411, which is connected to the filter membrane 42 via a sealing ring 44. The right view of both the first connector 411 and the filter membrane 42 is circular, with the filter membrane 42 having a larger radius than the first connector 411. This allows the filter membrane 42 to completely cover the first connector 411, preventing particulate matter from escaping through the gap between the first connector 411 and the filter membrane 42. The sealing ring 44 further enhances the sealing performance of the connection, ensuring no particulate matter leakage during sampling, thus guaranteeing the accuracy and reliability of the sampling.

[0042] In some embodiments, one end of the second connecting pipe 5 may be provided with a second connector 51. The left view of the second connector 51 is circular, and the radius of the second connector 51 is larger than the radius of the first connector 411. This ensures that the second connector 51 can be securely connected to the first connector 411, and a good sealing effect can be formed between the two.

[0043] This application provides a flue gas particulate matter sampling system, including a sampling head, a first sampling bend, a sampling straight pipe, a first connecting pipe, a second sampling bend, a second connecting pipe, and an automatic sampler. The sampling head can collect flue gas particulate matter inside the stove. The sampling head is connected to the first sampling bend, the other end of the first sampling bend is connected to one end of the sampling straight pipe, the other end of the sampling straight pipe is connected to one end of the first connecting pipe, the other end of the first connecting pipe is connected to one end of the second sampling bend, the other end of the second sampling bend is connected to one end of the second connecting pipe, and the other end of the second connecting pipe is connected to the automatic sampler. This allows the flue gas particulate matter collected by the sampling head to sequentially pass through the first sampling bend, the sampling straight pipe, the first connecting pipe, the second sampling bend, and the second connecting pipe into the automatic sampler. The automatic sampler can analyze the composition and content of each component of the collected flue gas particulate matter. The sampling head, the first sampling bend, the sampling straight pipe, the first connecting pipe, and the second sampling bend can form a sampling rod. The first sampling bend includes a first bend body, one end of which is connected to a sampling head, and the other end of which is connected to one end of a sampling straight tube. The second sampling bend includes a second bend body, a filter membrane, and a gasket. One end of the second bend body is connected to the other end of a first connecting tube. The other end of the second bend body, the filter membrane, and the gasket are sequentially arranged. A sealing ring is located at the edge of the other end of the second bend body, the filter membrane, and the gasket, and is used to securely connect the other end of the second bend body, the filter membrane, and the gasket. In the first sampling bend inside the furnace, there is no filter membrane, gasket, or sealing ring, and the temperature of the flue gas particles inside the furnace does not exceed the melting point of the first sampling bend. In the second sampling bend, there is a filter membrane, gasket, and sealing ring, and the temperature of the flue gas particles inside the furnace exceeds the melting point of the second sampling bend. A sampling straight pipe and a first connecting pipe are installed between the second sampling bend and the first sampling bend. After the flue gas particles pass through the first sampling bend, the sampling straight pipe, and the first connecting pipe, their temperature decreases, ensuring that the temperature of the particles entering the second sampling bend does not exceed the melting point of the second sampling bend. This reduces the risk of the second sampling bend melting due to excessively high flue gas particle temperature within the furnace, thus protecting the second sampling bend and allowing the sampling rod to collect excessively hot flue gas particles. In this application, by installing a sampling straight pipe and a first connecting pipe between the first and second sampling bends, the melting of the second sampling bend due to excessively high flue gas particle temperature within the furnace can be reduced, thus protecting the second sampling bend and allowing the sampling rod to collect excessively hot flue gas particles.

[0044] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the embodiments described herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not used in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims. It should be understood that this application is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A flue gas particulate matter sampling system characterized by, The system includes a sampling head (9), a first sampling bend (1), a sampling straight tube (2), a first connecting tube (3), a second sampling bend (4), a second connecting tube (5), and an automatic sampler (6). The sampling head (9) is connected to one end of the first sampling bend (1), the other end of the first sampling bend (1) is connected to one end of the sampling straight tube (2), the other end of the sampling straight tube (2) is connected to one end of the first connecting tube (3), the other end of the first connecting tube (3) is connected to one end of the second sampling bend (4), the other end of the second sampling bend (4) is connected to one end of the second connecting tube (5), and the other end of the second connecting tube (5) is connected to the automatic sampler (6). The first sampling bend (1) includes a first bend body (11), one end of the first bend body (11) is connected to the sampling head (9), and the other end of the first bend body (11) is connected to one end of the sampling straight tube (2). The second sampling bend (4) includes a second bend body (41), a filter membrane (42), a gasket (43) and a sealing ring (44). One end of the second bend body (41) is connected to the other end of the first connecting tube (3). The other end of the second bend body (41), the filter membrane (42) and the gasket (43) are arranged in sequence. The sealing ring (44) is located at the edge of the other end of the second bend body (41), the filter membrane (42) and the gasket (43). The sealing ring (44) is used to fix the other end of the second bend body (41), the filter membrane (42) and the gasket (43) together.

2. The flue gas particulate matter sampling system of claim 1, wherein, The first sampling bend (1) is detachably connected to the sampling head (9).

3. The flue gas particulate matter sampling system of claim 1, wherein, It also includes a Pitot tube (7) and a protective sleeve (8), the Pitot tube (7) being connected to the automatic sampler (6), the Pitot tube (7) and the sampling straight tube (2) passing through the protective sleeve (8), and the second sampling bend (4) being located on the rear side of the protective sleeve (8).

4. The flue gas particulate matter sampling system of claim 1, wherein, The second bent tube body (41) includes a first connector (411), which is connected to the filter membrane (42) through the sealing ring (44). The right view of the first connector (411) is circular, the right view of the filter membrane (42) is circular, and the radius of the filter membrane (42) is greater than the radius of the first connector (411).

5. The flue gas particulate matter sampling system of claim 4, wherein, One end of the second connecting pipe (5) is provided with a second connector (51). The left view of the second connector (51) is circular, and the radius of the second connector (51) is greater than the radius of the first connector (411).

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