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Safety protection system for air separation

A technology of safety protection and air separation, applied in the direction of measuring devices, instruments, etc., can solve problems such as safe operation and emergency prevention hidden dangers, suffocation accidents, leakage and diffusion of storage tanks, etc., and achieve the effect of timely emergency response

Pending Publication Date: 2021-07-30
KAIFENG DEAR AIR SEPARATION IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In addition to pipeline transportation of chemicals, modern chemical production enterprises store the produced chemicals in various storage tanks. Since the chemicals are relatively concentrated in the storage tanks, their storage is safe and may bring The risk of leakage in the future has attracted more and more attention. The leakage and spread of storage tanks may not only affect the inside of the production enterprise, but may also spread to surrounding communities and enterprises. How to evaluate and prevent the spread of leakage of storage tanks, There are no relevant standards for the design of emergency measures and material preparations that the enterprise should take in various situations, and the designers have no relevant basis for how to prevent the leakage design of the storage tank in the surrounding area, which is for the safe operation and emergency response of the enterprise. To prevent some hidden dangers, the impact on the surrounding area and the notification and forecast, and to avoid the expansion of the situation all require diffusion model analysis
[0003] The oxygen production scale of the air separation equipment is expanded, and the storage tanks used as its backup and storage systems are also from tens of cubic meters to thousands of cubic meters. If a large-scale leakage occurs in the storage tank area of ​​​​such a factory , will have a great impact on factory employees and surrounding areas
[0004] The air separation process includes raw material air filtration and compression system, air precooling system, air purification system, fractionation tower system and storage system. The produced liquid oxygen, liquid nitrogen and liquid oxygen are transported and stored in the storage system through pipelines. In this state, the liquid oxygen leaked from the storage system is combined with combustibles and immediately ignites, forming a fire in an oxygen-enriched area; the leaked oxygen is not ignited, and forms an oxygen-enriched mass, threatening the personnel in its diffusion range; the leaked nitrogen gas diffuses , forming a certain suffocating gas cloud, which may cause suffocation accidents

Method used

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  • Safety protection system for air separation
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] combine figure 1 and figure 2 , a safety protection system for air separation, including a storage tank area 5, including a host computer 1 and a lower computer 4 controlling the storage tank area 5, the sensor group 6 in the storage tank area 5 collects the corresponding The parameters are transmitted to the data collector 3 through the pressure transmitter 7, and the data collector 3 uploads the collected data to the host computer 1 through the server 2, and the host computer 1 passes the control command through the data collector according to the corresponding data 3 to the lower computer 4, and the lower computer 4 controls the storage tank area 5 to make adjustments.

[0032] Through the pressure transmitter and the data collector, the parameter values ​​of the indicators in the dangerous source of the storage tank are collected in real time, and the data is judged and processed by the upper computer. When the indicators reach the specified limit value, the upper...

Embodiment 2

[0036] On the basis of Example 1, during the long-term operation of the storage tank, due to the filling and extraction of internal gas and the influence of the natural environment, it is inevitable that deformation will occur to varying degrees. When the storage tank is deformed to a certain extent, the stress concentration area of ​​the storage tank The probability of cracking and damage will be greatly increased, and the risk of leakage will also be increased. Therefore, an optical fiber grating strain sensor 27 is installed on the storage tank to detect the stress situation of each storage tank in the storage tank area 5. The optical fiber grating strain sensor 27 The sensor 27 is connected to the demodulator through a single-mode optical fiber, and the fiber grating strain sensor 27 transmits the received strain signal to the demodulator through the optical cable, and the demodulator demodulates the wavelength offset and transmits it to the host computer 1.

[0037] When ...

Embodiment 3

[0041] On the basis of Example 1, when the liquid substance in the storage tank in the storage tank area leaks, it is accompanied by a flash phenomenon, and part of the liquid substance is converted into steam and suspended in the air, forming a mixed heavy gas cloud. After heat absorption and evaporation, the cloud cluster is transformed into a gaseous state of matter and a mixed gas cloud cluster of air, forming a neutral gas cloud cluster. Therefore, the judgment of the continuous leakage rate Q of the liquid material in the storage tank in the server is as follows:

[0042] Q=S·P·{k·M·[2 / (k+1)] (k+1) / (k-1) / RT} 1 / 2 ;

[0043] Where S is the leakage area (m2), P is the pressure in the storage tank (Pa), M is the molecular weight of the corresponding gas (kg / mL), k is the adiabatic index, T is the absolute temperature of the corresponding gas (K), and R is Gas constant, T is the absolute temperature of the gas.

[0044] During the leakage process, the pressure in the stor...

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Abstract

The invention relates to a safety protection system for air separation. The system comprises a storage tank area comprising an upper computer and a lower computer for controlling the storage tank area, wherein a sensor group in the storage tank area transmits acquired corresponding parameters to a data acquisition unit through a pressure transmitter, the data acquisition unit uploads acquired data to the upper computer through a server, the upper computer sends a control instruction to the lower computer through the data collector according to the corresponding data, and the lower computer controls the storage tank area to make adjustment. According to the safety protection system provided by the invention, a safety coefficient of the storage tank area is improved, the possibility of accidents in the storage tank area is reduced, and purposes of hidden danger investigation and treatment are achieved.

Description

technical field [0001] The invention belongs to the technical field of air separation equipment safety, and in particular relates to a safety protection system for air separation. Background technique [0002] In addition to pipeline transportation of chemicals, modern chemical production enterprises store the produced chemicals in various storage tanks. Since the chemicals are relatively concentrated in the storage tanks, their storage is safe and may bring The risk of leakage in the future has attracted more and more attention. The leakage and spread of storage tanks may not only affect the inside of the production enterprise, but may also spread to surrounding communities and enterprises. How to evaluate and prevent the spread of leakage of storage tanks, There are no relevant standards for the design of emergency measures and material preparations that the enterprise should take in various situations, and the designers have no relevant basis for how to prevent the leakag...

Claims

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Application Information

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IPC IPC(8): G01D21/02
CPCG01D21/02
Inventor 王宏玉王文杰李虎
Owner KAIFENG DEAR AIR SEPARATION IND
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