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CN-122009690-A - Safety early warning method and system for raw coal bin of thermal power plant

CN122009690ACN 122009690 ACN122009690 ACN 122009690ACN-122009690-A

Abstract

The invention discloses a safety pre-warning method and a safety pre-warning system for an original coal bunker of a thermal power plant, wherein wall thickness data of each layer of the original coal bunker of the thermal power plant can be timely obtained through detection of multiple layers of measuring points, so that originally unpredictable wall thickness thinning rate becomes quantifiable, pre-warning condition conditions are set firstly based on preset proportion and preset threshold value of each layer, and then further safety pre-warning grading is carried out through data of all layers, so that different countermeasures can be conveniently selected for different pre-warning levels subsequently, resource waste caused by excessive overhaul is avoided, accident risks caused by insufficient overhaul are also prevented, the integral wall thickness condition of the original coal bunker is mastered in real time, the safety margin of the structural strength of the original coal bunker is calculated, important accidents of collapse of the original coal bunker can be effectively prevented, economic loss of the thermal power plant is reduced, and personal injury risks are reduced.

Inventors

  • SHEN ZHI
  • YANG HUI
  • LIU XING
  • ZHANG LIANGPING
  • ZHANG HAILONG
  • FU LONGLONG

Assignees

  • 西安热工研究院有限公司

Dates

Publication Date
20260512
Application Date
20260202

Claims (10)

  1. 1. The safety pre-warning method for the raw coal bunker of the thermal power plant is characterized by comprising the following steps of: Giving a plurality of measuring points, and obtaining the wall thickness of each layer of the raw coal bin of the thermal power plant according to the measuring points; Setting a preset ratio of measurement points in any layer, and judging that the current layer meets the early warning condition when the residual wall thickness of the current layer is smaller than a preset threshold value of the designed wall thickness; counting the number of layers meeting the early warning condition: When the number of layers meeting the early warning condition is 1, judging the current working condition as three-stage early warning; when the number of layers meeting the early warning condition is more than 1 and less than the total number of layers, judging the current working condition as secondary early warning; When the number of layers meeting the early warning condition is equal to the total number of layers, the current working condition is judged to be primary early warning.
  2. 2. The method for pre-warning the raw coal bunker safety of the thermal power plant according to claim 1, wherein when the measurement points with the predetermined proportion in any layer measure that the residual wall thickness of the current layer is smaller than the predetermined threshold value of the designed wall thickness, the method for pre-warning the raw coal bunker safety of the thermal power plant comprises the following steps: The number of the measuring points in the preset proportion is more than or equal to 75% of all the measuring points in the layer.
  3. 3. The method for pre-warning the raw coal bunker safety of the thermal power plant according to claim 2, wherein when the residual wall thickness of the current layer measured by the measuring points with the preset proportion in any layer is smaller than the preset threshold value of the designed wall thickness, the method for pre-warning the raw coal bunker safety of the thermal power plant comprises the following steps: The predetermined threshold is less than 20% of the design wall thickness.
  4. 4. The method for early warning of raw coal bunker safety of a thermal power plant according to claim 1, wherein the given plurality of measurement points, the obtaining the wall thickness of each layer of the raw coal bunker of the thermal power plant according to the plurality of measurement points, comprises the following steps: and arranging a plurality of probes on each layer of the raw coal bin cylinder body, wherein the probes form a plurality of measuring points.
  5. 5. The method for early warning of raw coal bunker safety in a thermal power plant according to claim 4, wherein the probe is an ultrasonic probe or an electromagnetic ultrasonic probe.
  6. 6. The method for early warning of raw coal bunker safety in a thermal power plant according to claim 4, wherein 6 or 8 probes are arranged on each layer of raw coal bunker cylinder.
  7. 7. The method for early warning of raw coal bunker safety in a thermal power plant according to claim 1, further comprising the step of formulating different early warning measures according to different levels of early warning.
  8. 8. The utility model provides a former coal bunker safety precaution system of thermal power plant which characterized in that includes: the data measurement module is used for giving a plurality of measurement points and acquiring the wall thickness of each layer of the raw coal bin of the thermal power plant according to the plurality of measurement points; The early warning condition setting module is used for setting the early warning condition met by the current layer when the residual wall thickness of the current layer measured by the measuring points with the preset proportion in any layer is smaller than the preset threshold value of the designed wall thickness; The early warning level judging module is used for counting the number of layers meeting the early warning conditions, judging the current working condition as three-level early warning when the number of layers meeting the early warning conditions is 1, judging the current working condition as two-level early warning when the number of layers meeting the early warning conditions is more than 1 and less than the total number of layers, and judging the current working condition as one-level early warning when the number of layers meeting the early warning conditions is equal to the total number of layers.
  9. 9. A terminal device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1-7 when the computer program is executed.
  10. 10. A computer readable storage medium storing a computer program, characterized in that the computer program when executed by a processor implements the steps of the method according to any one of claims 1-7.

Description

Safety early warning method and system for raw coal bin of thermal power plant Technical Field The invention belongs to the field of safety early warning of thermal power plants, and relates to a safety early warning method and system for raw coal bins of a thermal power plant. Background The raw coal bin is a container for temporarily storing fuel in a thermal power plant, and the structure of the raw coal bin is generally an upper cylindrical barrel and a lower conical barrel. When the fire coal falls from the belt to the raw coal bin, the fire coal continuously erodes and wears the wall surface of the cylinder body. The coal contains water and sulfur, and acidic substances formed when the coal is retained in the raw coal bin corrode the wall surface of the cylinder body. After the abrasion and corrosion are continuously carried out for a long time, the thickness of the wall surface of the cylinder body is continuously reduced, so that not only can the coal dust leak be caused, but also the structural strength of the raw coal bin can be reduced, the integral bearing capacity of the raw coal bin is reduced, and even the raw coal bin collapses when serious. The overhaul period of the thermal power plant unit is longer, and the inspection of the upper cylinder body of the raw coal bin needs to be carried out by setting up a scaffold, and is generally carried out only during overhaul. But the wall thickness reduction rate of the raw coal bin is unpredictable, the condition of the residual wall thickness is unknown, and the long maintenance period can cause perforation of the wall of the raw coal bin and even overall collapse in operation. Disclosure of Invention The invention aims to solve the problems that in the prior art, the overhaul period of a power plant unit is long, the condition of the residual wall thickness is unknown, the condition of the residual wall thickness cannot be obtained in time, and the through hole of the cylinder wall and even the whole collapse of the cylinder wall in operation can be caused by the overlong overhaul period. In order to achieve the purpose, the invention is realized by adopting the following technical scheme: a safety pre-warning method for a raw coal bunker of a thermal power plant comprises the following steps: Giving a plurality of measuring points, and obtaining the wall thickness of each layer of the raw coal bin of the thermal power plant according to the measuring points; Setting a preset ratio of measurement points in any layer, and judging that the current layer meets the early warning condition when the residual wall thickness of the current layer is smaller than a preset threshold value of the designed wall thickness; counting the number of layers meeting the early warning condition: When the number of layers meeting the early warning condition is 1, judging the current working condition as three-stage early warning; when the number of layers meeting the early warning condition is more than 1 and less than the total number of layers, judging the current working condition as secondary early warning; When the number of layers meeting the early warning condition is equal to the total number of layers, the current working condition is judged to be primary early warning. The invention further improves that: And when the measurement points with the preset proportion measure that the residual wall thickness of the current layer is smaller than the preset threshold value of the designed wall thickness in any layer, judging that the current layer meets the early warning condition, wherein the method comprises the following steps: The number of the measuring points in the preset proportion is more than or equal to 75% of all the measuring points in the layer. When the residual wall thickness of the current layer measured by the measuring points with the preset proportion in any layer is smaller than the preset threshold value of the designed wall thickness, the current layer is judged to meet the early warning condition, and the method comprises the following steps: The predetermined threshold is less than 20% of the design wall thickness. The given plurality of measuring points, the wall thickness of each layer of the raw coal bin of the thermal power plant is obtained according to the plurality of measuring points, and the method comprises the following steps: and arranging a plurality of probes on each layer of the raw coal bin cylinder body, wherein the probes form a plurality of measuring points. The probe is an ultrasonic probe or an electromagnetic ultrasonic probe. And 6 or 8 probes are arranged on each layer of the raw coal bin barrel. And the method also comprises the step of formulating different pre-warning measures according to the pre-warning of different levels. The wall thickness data of each layer of the raw coal bin of the thermal power plant can be timely obtained through detection of the multi-layer measuring points, so that the originally unpred