Process device and method for avoiding combustible liquid storage tank gaseous-phase burning explosion and held pressure damage

A technology for process equipment and storage tank gas, which is applied in the field of process equipment to avoid gas-phase explosion and pressure-suppressed damage of flammable liquid storage tanks. Achieve the effects of preventing gas phase explosion, reducing usage, and preventing explosion

Inactive Publication Date: 2015-08-12
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the large consumption of nitrogen in the prior art and the problem...

Method used

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  • Process device and method for avoiding combustible liquid storage tank gaseous-phase burning explosion and held pressure damage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A process device and method for avoiding gas-phase explosion and pressure-suppressed damage of a flammable liquid storage tank, which is used for oil product storage tanks, and the oil products include gasoline, kerosene, diesel oil, dirty oil, naphtha, solvent oil, and crude oil etc., the device includes two storage tanks (9), buffer tank (1), breathing valve (2), oxygen content detector (4), supplementary nitrogen pipeline (5), regulating valve (3), two storage tanks The gas phase space of the tank (9) is connected to the main discharge pipeline (10) through the tail gas discharge pipeline, the outlet of the total discharge pipeline (10) is connected to the top of the buffer tank (1), and one end of the breathing valve (2) is connected to the bottom of the buffer tank (1). The gas phase space is connected, and the breathing valve (2) is provided with an air inlet (6) and an exhaust gas outlet (7). It is characterized in that the oxygen content detector (4) is arranged ...

Embodiment 2

[0023] According to the conditions described in Example 1, only the device is applied to the alkane storage tank, and the alkane includes pentane, hexane, cyclohexane, pentane oil and the like. When the gaseous oxygen content in the buffer tank is higher than 9.6%, the valve is automatically opened to feed nitrogen until the gaseous oxygen volume content in the buffer tank is lower than 9.6%; when the gaseous oxygen volume content is lower than 9.6%, the valve is automatically closed to stop feeding nitrogen. Through the above control loop, it is ensured that the oxygen volume content in the gas phase of the storage tank is lower than 9.6%. In the case of saving nitrogen, the gas phase of the alkane storage tank is prevented from detonating.

[0024] By adopting the device of the invention, compared with completely using nitrogen to protect storage tanks, at least 72.9% of nitrogen can be saved, and the safety effect achieved is completely consistent. At the same time, it prev...

Embodiment 3

[0026] According to the conditions described in Example 1, only the device is applied to an organic acid storage tank, and the organic acid includes formic acid, acetic acid, propionic acid, butyric acid, isobutyric acid, isooctanoic acid and the like. When the gaseous oxygen content in the buffer tank is higher than 5.1%, the valve is automatically opened to feed nitrogen until the gaseous oxygen volume content in the buffer tank is lower than 5.1%; when the gaseous oxygen volume content is lower than 5.1%, the valve is automatically closed to stop feeding nitrogen. Through the above control loop, it is ensured that the oxygen volume content in the gas phase of the storage tank is lower than 5.1%. In the case of saving nitrogen, the organic acid storage tank is prevented from detonating in the gas phase.

[0027] By adopting the device of the invention, compared with completely using nitrogen to protect storage tanks, at least 62.2% of nitrogen can be saved, and the safety e...

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Abstract

The invention relates to a process device and a method for avoiding combustible liquid storage tank gaseous-phase burning explosion and held pressure damage. The problems that in the prior art, the nitrogen consumption is large, and pumping shrinking is easily caused are mainly solved. According to the process device for avoiding the combustible liquid storage tank gaseous-phase burning explosion and the held pressure damage, gaseous phase space of storage tanks(9) is connected with the top of a buffer tank (1) through pipes, one end of a breather valve (2) is connected with gaseous phase space of the buffer tank (1), an oxygen content detector (4) is arranged on the gaseous phase space of the buffer tank (1), a nitrogen supplementing pipe (5) is connected with the buffer tank (1), an adjusting valve (3) is arranged on the nitrogen supplementing pipe (5), and the upper portion of the buffer tank (1) is connected with a safety water seal (12) through a pipe. By means of the technical scheme, the above problems are better solved, and the process device and the method can be used for avoiding the combustible liquid storage tank gaseous-phase burning explosion.

Description

technical field [0001] The invention relates to a process device and method for avoiding gas-phase explosion and pressure-suppressed damage of a flammable liquid storage tank. Background technique [0002] For flammable liquids, such as oil, alkanes, organic oxides, etc., the gas phase of flammable liquid storage tanks is often in an explosive atmosphere. In order to prevent the gas phase explosion of flammable liquid storage tanks, the most conventional and effective way is to use gas phase nitrogen protection. The tank breathing valve continuously replenishes nitrogen. With the operation of the storage tank, nitrogen is continuously added and exhaled to keep the gas phase in the tank in an oxygen-free state. At present, the commonly used oil storage tanks have a capacity of 5,000-10,000 cubic meters. Therefore, this method requires a large amount of nitrogen, and the operating cost is relatively high for enterprises that are not rich in nitrogen. Through research, 1 cubic ...

Claims

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Application Information

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IPC IPC(8): B65D90/22B65D90/48
CPCB65D90/325B65D90/48
Inventor 石宁王林孙冰费轶姜杰
Owner CHINA PETROLEUM & CHEM CORP
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