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CN-120907894-B - Intelligent sampling system and control method for hazardous chemical substance storage tank

CN120907894BCN 120907894 BCN120907894 BCN 120907894BCN-120907894-B

Abstract

An intelligent sampling system and a control method for a hazardous chemical substance storage tank relate to the field of sampling control. The system comprises a storage tank, a sampling tube, a steel wire rope, a roller box, a driving motor and a sampling control box, wherein a roller is arranged in the roller box, sampling ports are formed in the storage tank and the roller box, the sampling ports are connected with the roller box through flanges, the sampling tube is connected with one end of the steel wire rope, the other end of the steel wire rope is wound on the roller, a driving shaft of the driving motor is fixedly connected with the roller shaft in the axial direction, the sampling control box is electrically connected with the driving motor and used for controlling the sampling speed, the storage tank is further provided with a high-frequency radar liquid level meter and used for detecting the liquid level height in the storage tank, and a balancing weight is further arranged on the outer wall of the sampling tube and used for enabling the sampling tube to sink to a designated depth. By implementing the technical scheme provided by the application, the problems that when the sampling structure of the current telescopic sampling tube faces dangerous chemicals with high viscosity and particle impurities, the inlet of the telescopic tube is easy to be blocked and residual medium in the tube is difficult to thoroughly clean are solved.

Inventors

  • QU YANLIN
  • LU CHAO
  • ZHOU SHENSHAN
  • LU DAYU

Assignees

  • 湖北万安环保石化设备有限公司

Dates

Publication Date
20260508
Application Date
20250826

Claims (6)

  1. 1. The utility model provides a danger article storage tank intelligence sampling control method which characterized in that is applied to in danger article storage tank intelligence sampling system's sampling control box (9), danger article storage tank intelligence sampling system includes storage tank (5), sampling tube (3), wire rope (4), roller box (10), driving motor (7) and sampling control box (9), be provided with roller (11) in roller box (10), wherein: The storage tank (5) and the roller box are provided with sampling ports which are connected by adopting a flange (6), The sampling tube (3) is connected with one end of the steel wire rope (4), the other end of the steel wire rope (4) is wound on the winding roller (11), The driving shaft of the driving motor (7) is axially and fixedly connected with the winding roller (11), The sampling control box (9) is electrically connected with the driving motor (7) and is used for controlling the sampling speed, The storage tank (5) is also provided with a high-frequency radar liquid level gauge for detecting the liquid level height in the storage tank (5), The outer wall of the sampling tube (3) is also provided with a balancing weight (1) for sinking the sampling tube (3) to a specified depth, The outer wall of the sampling tube (3) is also provided with a miniature static induction probe (2), The grounding end of the roll box (10) is connected in series with a high-frequency current sensor (8) for detecting current flowing to the grounding end, and the method comprises the following steps: According to the electric data collected by the miniature electrostatic induction probe (2) and the high-frequency current sensor (8), determining the charge generation rate and the charge dissipation rate of the surface of the sampling cylinder (3); determining whether the charge generation rate is greater than the charge dissipation rate; if yes, acquiring the sampling depth of the sampling cylinder (3); based on the sampling depth and the liquid level of the storage tank (5), determining a target sampling speed of the sampling cylinder (3), which is specifically: If the sampling depth is below the liquid level of the storage tank (5), determining the flow state of the liquid dangerous chemical according to the current sampling speed of the sampling cylinder (3); calculating the viscous resistance of the liquid hazardous chemical substance to the sampling cylinder (3) according to the flowing state of the liquid hazardous chemical substance; calculating accumulated potential energy according to the viscous resistance and the sampling depth; Calculating to obtain a target sampling speed of the sampling cylinder (3) based on a safe energy threshold of the hazardous chemical liquid; and adjusting the power of the driving motor (7) according to the target sampling speed.
  2. 2. The method according to claim 1, wherein said determining a target sampling speed of the cartridge (3) based on the sampling depth, in particular further comprises: If the sampling depth is above the liquid level of the storage tank (5), judging whether the charge dissipation rate is greater than or equal to a preset threshold value; If not, obtaining a first sampling speed adjusting coefficient according to the ratio of the charge dissipation rate to the charge generation rate; and adjusting the current sampling speed based on the first sampling speed adjusting coefficient to obtain the target sampling speed of the sampling cylinder (3).
  3. 3. The method according to claim 2, wherein said determining whether said charge generation rate is greater than or equal to a preset threshold value, in particular further comprises: if the charge dissipation rate is greater than or equal to a preset threshold value, calculating the residual thickness of the liquid film on the sampling cylinder (3) according to the current sampling speed; acquiring the gas phase concentration and the temperature in the storage tank (5); determining the evaporation rate of the liquid film according to the gas phase concentration and the temperature; determining a liquid film residual coefficient according to the liquid film residual thickness and the liquid film evaporation rate; According to the liquid film residual coefficient, the charge dissipation rate is adjusted to obtain a risk charge dissipation rate; obtaining a second sampling speed adjustment coefficient according to the ratio of the risk charge dissipation rate to the charge generation rate; And adjusting the current sampling speed based on the second sampling speed adjusting coefficient to obtain the target sampling speed of the sampling cylinder (3).
  4. 4. An intelligent sampling control device for a hazardous chemical storage tank, which is characterized in that the device is a sampling control box (9), the sampling control box (9) comprises an acquisition module (91), a processing module (92) and a control module (93), and the sampling control box (9) is used for executing the intelligent sampling control method for the hazardous chemical storage tank according to any one of claims 1-3, wherein: The acquisition module (91) is used for determining the charge generation rate and the charge dissipation rate of the surface of the sampling tube (3) according to the electric data acquired by the miniature electrostatic induction probe (2) and the high-frequency current sensor (8); The processing module (92) is used for judging whether the charge generation rate is greater than the charge dissipation rate, if so, acquiring the sampling depth of the sampling cylinder (3), and determining the target sampling speed of the sampling cylinder (3) based on the sampling depth and the liquid level of the storage tank (5); The control module (93) is used for adjusting the power of the driving motor (7) according to the target sampling speed.
  5. 5. An electronic device comprising a processor (401), a memory (405), a user interface (403) and a network interface (404), the memory (405) being for storing instructions, the user interface (403) and the network interface (404) being for communicating to other devices, the processor (401) being for executing the instructions stored in the memory (405) to cause the electronic device (400) to perform the method according to any of claims 1 to 3.
  6. 6. A computer readable storage medium storing instructions which, when executed, perform the method of any one of claims 1 to 3.

Description

Intelligent sampling system and control method for hazardous chemical substance storage tank Technical Field The application relates to the technical field of sampling control, in particular to an intelligent sampling system and a control method for a hazardous chemical substance storage tank. Background In the long-term storage process of the liquid dangerous chemical, the quality of the liquid dangerous chemical is reduced due to the property change possibly caused by factors such as temperature change, pressure fluctuation, medium volatilization and the like, so that periodic sampling detection is needed to ensure the quality stability of the final product. The current sampling mode is mostly through seting up the sampling hole on the storage tank, then install sampling pipeline and valve at the sampling hole, open the valve when needs sampling, liquid danger article flows into the collecting bottle through the pipeline in this kind of mode, and this kind of mode is simple and convenient, but can't satisfy the sampling demand at the different degree of depth of storage tank, therefore, the sampling structure of a telescopic sampling pipe has been proposed in the prior art, it is through in the sealed tank body of storage liquid danger article, the flexible pipe of sampling that installs accessible traction mechanism and realize going up and down, this pipe one end sets up to the sampling mouth, the other end stretches out jar body and connects sampling device, through control traction mechanism, adjust the flexible pipe of sampling in the internal height of jar, thereby realize the sampling of different degree of depth. However, the sampling structure of the telescopic sampling tube is easy to block the inlet of the telescopic tube when facing to dangerous chemicals with high viscosity and particle impurities, so that effective sampling is difficult, and in addition, residual media in the tube are difficult to thoroughly clean after sampling, so that a subsequent sampling sample is polluted. Disclosure of Invention Aiming at the problems that the inlet of the telescopic pipe is easy to be blocked and residual medium in the pipe is difficult to be thoroughly cleaned when the sampling structure of the telescopic sampling pipe faces to dangerous chemicals with high viscosity and particle impurities at present, the application provides an intelligent sampling system of a dangerous chemicals storage tank and a control method. In a first aspect, the application provides an intelligent sampling system for a dangerous chemical storage tank, which comprises a storage tank, a sampling cylinder, a steel wire rope, a roller box, a driving motor and a sampling control box, wherein a roller is arranged in the roller box, and the intelligent sampling system comprises the following components: The storage tank and the roller box are provided with sampling ports and are connected by flanges; the sampling cylinder is connected with one end of the steel wire rope, and the other end of the steel wire rope is wound on the winding roller; The driving shaft of the driving motor is fixedly connected with the axial direction of the winding roller; the sampling control box is electrically connected with the driving motor and used for controlling the sampling speed; The storage tank is also provided with a high-frequency radar liquid level gauge for detecting the liquid level height in the storage tank; the outer wall of the sampling tube is also provided with a balancing weight which is used for enabling the sampling tube to sink to a designated depth. Optionally, a micro static induction probe is further installed on the outer wall of the sampling tube, wherein the micro static induction probe is used for detecting charges generated on the surface of the sampling tube. Optionally, a high-frequency current sensor is connected in series with the grounding end of the roller box and is used for detecting current flowing to the grounding end. In a second aspect, the present application provides an intelligent sampling control method for a hazardous chemical substance storage tank, which is applied to the sampling control box in any one of the first aspects, and the method includes: Determining the charge generation rate and the charge dissipation rate of the surface of the sampling tube according to the electric data collected by the miniature electrostatic induction probe and the high-frequency current sensor; determining whether the charge generation rate is greater than the charge dissipation rate; If yes, acquiring the sampling depth of the sampling cylinder; determining a target sampling speed of the sampling cylinder based on the sampling depth and the liquid level of the storage tank; And adjusting the power of the driving motor according to the target sampling speed. Optionally, the determining, based on the sampling depth, the target sampling speed of the sampling cylinder specifically includes: If the sampling depth is belo