Online measurement method for dust deposition height of transverse pipeline at dust removal inlet

Abstract

The invention discloses an online measurement method for the dust deposition height of a transverse pipeline at a dust removal inlet. A group of wear-resistant armored thermal resistors are mounted at the bottom of the pipeline at an interval of 300mm in the direction of the pipeline at a transverse pipeline section at the inlet of a solid particulate matter dust removal pipeline system; by utilizing the characteristic that after a temperature measuring point of the thermal resistor is completely immersed into solid particle accumulated dust, the thermal resistor is isolated from a gas temperature field flowing through a pipeline due to a solid particle covering heat preservation effect, and then the detected temperature is relatively stable, when a corresponding thermal resistor temperature trend curve is nearly straightened, the current accumulated dust height in a transverse pipeline section can be reflected; the online detection of the dust deposition degree of the pipeline of the solid particle dust removal system is realized. According to the invention, online real-time monitoring of the dust deposition degree of the pipeline is realized; the problems that the dust collection efficiency is reduced, the operation cost is increased and the safety of a dust collection pipe system is poor due to the fact that much dust is accumulated in a dust collection inlet transverse pipeline and cannot be found in time can be solved.

Description

Technical Field

[0001] The invention relates to the field of dust removal, and in particular to an online measurement method for dust accumulation height in a transverse pipeline at a dust removal inlet. Background Art

[0002] At present, according to the national environmental protection control requirements, various industrial and mining enterprises have increased their investment in environmental protection and built a number of dust removal systems. In order to improve energy efficiency, various enterprises are studying the use of intelligent control to optimize the operating costs of dust removal systems. Among them, variable frequency control of dust removal fans is a commonly used method. In the pursuit of extreme cost control, too low fan operating frequency can easily cause the suction force of the pipeline to be difficult to overcome the friction force of the gravity of solid particles in the horizontal pipeline of the dust removal inlet, causing solid particles to accumulate in the horizontal pipeline of the dust removal inlet. As the solid particles accumulate more and more, the ventilation rate of the pipeline becomes worse. On the one hand, the fan operation energy consumption increases to ensure the dust removal effect, and on the other hand, there is a risk of dust removal pipeline collapse.

[0003] At present, there are no application cases of this technology in the industry. Enterprises generally open holes in dust removal pipes for inspection and operate on high-altitude pipes, which poses great safety risks and low work efficiency.

[0004] Therefore, it is necessary to develop a new type of online real-time monitoring technology for pipeline dust accumulation to overcome the above problems. Summary of the invention

[0005] Purpose of the invention: In view of the shortcomings and defects of the prior art, the present invention provides an online measurement method for the dust accumulation height in the transverse pipe of the dust removal inlet, so as to realize online real-time monitoring of the dust accumulation degree in the pipe; it can avoid excessive dust accumulation in the transverse pipe of the dust removal inlet, the decrease in dust removal efficiency caused by untimely discovery, the increase in operating costs and the safety problems of the dust removal pipe system itself.

[0006] Technical solution: An online measurement method for the dust accumulation height in the transverse pipeline of a dust removal inlet of the present invention is characterized in that: in the transverse pipeline section at the inlet of the solid particle dust removal pipeline system, a group of wear-resistant armored thermal resistors are installed at a distance of 300mm along the pipeline direction at the bottom of the pipeline; after the temperature measuring point of the thermal resistor is completely immersed in the solid particle dust, the thermal resistor isolates the temperature field of the gas flowing through the pipeline due to the insulation effect of the solid particles, and the detection temperature is relatively stable. When the corresponding temperature trend curve of the thermal resistor is almost straightened, it can reflect the current dust accumulation height in the transverse pipeline section, thereby realizing online detection of the dust accumulation degree in the pipeline of the solid particle dust removal system.

[0007] Among them, when installing a set of wear-resistant armored thermal resistors, when installing 7 wear-resistant armored thermal resistors.

[0008] Among them, the 7 wear-resistant armored thermal resistors are respectively 10mm, 30mm, 50mm, 75mm, 100mm, 150mm and 200mm higher than the bottom of the pipeline.

[0009] Wherein, the wear-resistant armored thermal resistor is arranged on the horizontal pipe, and the installation direction of the wear-resistant armored thermal resistor is perpendicular to the flow direction of the dust removal wind.

[0010] Wherein, the horizontal pipe is a horizontal pipe section at the inlet of the solid particle dust removal pipe system.

[0011] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The present invention monitors the dust accumulation height of the inlet transverse pipe of the solid particle dust removal system with temperature fluctuation online and in a graded manner, which is suitable for the solid particle dust removal system in the industry that pursues economic operation, and can avoid the dust accumulation in the inlet transverse pipe of the dust removal, the decrease in dust removal efficiency caused by untimely discovery, the increase in operating costs and the safety of the dust removal pipe system itself. It prevents the dust removal pipe from collapsing easily due to the wear of the dust removal pipe, and ensures the effective and economical operation of the dust removal system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the installation structure of the wear-resistant armored thermal resistor of the present invention;

[0013] Figure 2 It is a schematic diagram of the temperature trend change of the state line of the thermal resistor of the present invention when it is not buried by dust accumulation;

[0014] Figure 3 It is a schematic diagram of the temperature trend change of the state line of the thermal resistor buried by dust of the present invention;

[0015] In the figure, 1 is the horizontal pipe; 2 is the wear-resistant armored thermal resistor; 3 is the dust removal wind flow direction. DETAILED DESCRIPTION

[0016] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0017] The online measurement method of dust accumulation height in the transverse pipeline of the dust removal inlet of the present invention is to install a group (7 pieces) of wear-resistant armored thermal resistors at a distance of 300mm at the bottom of the pipeline along the pipeline direction at the transverse pipeline section at the entrance of the solid particle dust removal pipeline system; the 7 wear-resistant armored thermal resistors are respectively 10mm, 30mm, 50mm, 75mm, 100mm, 150mm, and 200mm higher than the bottom of the pipeline; the specific number and classification standard can be adjusted with reference to the inner diameter of the pipeline and the actual scene needs. After the temperature measuring point of the thermal resistor is completely immersed in the solid particle dust, the thermal resistor detects a relatively stable temperature after the gas temperature field flowing through the pipeline is isolated due to the insulation effect of the solid particles. When the corresponding thermal resistor temperature trend curve is almost straightened, it can reflect the current dust accumulation height in the transverse pipeline section, and realize the online detection of the dust accumulation degree of the pipeline of the solid particle dust removal system.

[0018] The wear-resistant armored thermal resistor 2 of the present invention is arranged on the horizontal pipe 1, and the installation direction of the wear-resistant armored thermal resistor 2 is perpendicular to the dust removal wind flow direction 3. The horizontal pipe 1 is a horizontal pipe section at the inlet of the solid particle dust removal pipe system.

[0019] like Figure 2-3 The invention can monitor the dust accumulation height of the inlet lateral pipe of the solid particle dust removal system with temperature fluctuation online and in stages. It is suitable for the solid particle dust removal system in the industry that pursues economic operation. It can avoid the dust accumulation in the inlet lateral pipe of the dust removal system, the decrease of dust removal efficiency, the increase of operating cost and the safety problem of the dust removal pipe system itself caused by the untimely discovery of the dust accumulation. It can prevent the dust removal pipe from collapsing easily due to the wear of the dust removal pipe. It can ensure the effective and economic operation of the dust removal system.

[0020] The present invention can detect the dust accumulation height of the horizontal pipe section at the inlet of the solid particle dust removal pipe system online, find the appropriate low-frequency limit of the dust removal system, and realize economical operation under the premise of effective operation of the dust removal system.

Claims

1. An online measurement method for dust accumulation height in a transverse duct at a dust removal inlet, characterized in that: In the horizontal pipe section at the entrance of the solid particle dust removal system, a group of wear-resistant armored thermal resistors are installed at a distance of 300mm at the bottom of the pipe along the direction of the pipe. After the temperature measuring point of the thermal resistor is completely immersed in the solid particle dust, the thermal resistor isolates the temperature field of the gas flowing through the pipe due to the insulation effect of the solid particles. When the corresponding temperature trend curve of the thermal resistor is almost straightened, it can reflect the current dust accumulation height in the horizontal pipe section, thereby realizing online detection of the dust accumulation degree in the pipeline of the solid particle dust removal system.

2. The method for online measurement of dust accumulation height in the transverse duct of the dust removal inlet according to claim 1 is characterized by: When installing a set of wear-resistant armored thermal resistors, when installing 7 wear-resistant armored thermal resistors.

3. The method for online measurement of dust accumulation height in the transverse duct of the dust removal inlet according to claim 2 is characterized by: The 7 wear-resistant armored thermal resistors are respectively 10mm, 30mm, 50mm, 75mm, 100mm, 150mm and 200mm higher than the bottom of the pipeline.

4. The method for online measurement of dust accumulation height in the transverse duct of the dust removal inlet according to claim 1 is characterized by: The wear-resistant armored thermal resistor (2) is arranged on the horizontal pipe (1), and the installation direction of the wear-resistant armored thermal resistor (2) is perpendicular to the dust removal wind flow direction (3).

5. The method for online measurement of dust accumulation height in the transverse duct of the dust removal inlet according to claim 4 is characterized in that: The transverse pipe (1) is a transverse pipe section at the inlet of the solid particle dust removal pipe system.

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