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Nitrogen sealing system of tank field

A technology of nitrogen blanketing and tank farms, applied in the field of nitrogen blanketing system, can solve the problems of increased energy consumption in system operation, increased investment in pipeline accessories, unbalanced nitrogen consumption, etc., and achieves the reduction of total emissions, the reduction of the scale of air separation units, and the reduction of nitrogen The effect of decreasing usage

Pending Publication Date: 2019-10-29
宝塔国际石化工程技术有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

There are two types of problems: ①The nitrogen blanketing pipeline of each storage tank is equipped with nitrogen blanketing valves, flow-limiting orifice plates, check valves, etc., resulting in increased investment in pipeline accessories
②The nitrogen-enriched and nitrogen-encapsulated exhaust gas discharged from each nitrogen-encapsulated storage tank is not fully utilized, increasing nitrogen consumption and increasing energy consumption for system operation
③The amount of nitrogen used in the storage tank area is unbalanced. Considering the maximum amount of gas used, the scale of nitrogen is large, the investment is high but the utilization rate is low

Method used

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Embodiment Construction

[0012] System design description: figure 1 and figure 2 The storage tanks (1, 2) are used as examples in the middle, and more storage tanks can be added when the system is set up. The relationship is similar to the attached figure.

[0013] figure 1 and figure 2 The middle restrictor orifice 3 is a nitrogen flow control element, which can effectively prevent the overpressure of the storage tank from being released due to excessive nitrogen replenishment, resulting in nitrogen waste.

[0014] figure 1 and figure 2 The stop return valve 4 can effectively prevent the flammable gas from running back to the nitrogen gas filter and prevent the occurrence of explosion accidents.

[0015] figure 1 and figure 2 Medium self-operated nitrogen sealing valve 5, the control tank pressure is stable at +800 ~ +1400kpa, when the pressure drops to +500kpa, the self-operated nitrogen sealing valve opens, and when the pressure increases +1600kpa, the self-operated nitrogen sealing val...

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Abstract

The invention discloses a nitrogen sealing system of a tank field oil. The nitrogen sealing system needs to be arranged in parts of storage tanks for toxic and combustible oil products at the storagetank field of a petrochemical enterprise according to different properties of materials, nitrogen sealing is carried out on the storage tanks, so that the oil products can be effectively prevented from making direct contact with air, the product deterioration risk is reduced, the safety risk caused by toxic combustible gas is reduced, the oil gas volatilization degree is lowered, and the pollutionto the environment is reduced. The nitrogen sealing system can solve the following problems that at present, when nitrogen sealing of oil product storage tanks in China is performed, each nitrogen seal tank creates a self-contained system, all the nitrogen seal tanks cannot be comprehensively considered, and then (1) the investment of pipeline accessories is increased due to the fact that a nitrogen sealing valve, a flow limiting pore plate, a check valve and the like are arranged on each storage tank nitrogen sealing pipeline; (2) nitrogen-rich nitrogen-sealed tail gas discharged by each nitrogen seal storage tank is not fully utilized, the nitrogen consumption is increased, and the system operation energy consumption is increased; and (3) the usage amount of nitrogen in the storage tankfield is unbalanced, the maximum gas consumption is considered, the nitrogen scale is large, the investment is high, but the utilization rate is low.

Description

technical field [0001] The invention relates to the field of safe and environmentally friendly production of oil storage and transportation in petrochemical enterprises, in particular to a nitrogen sealing system capable of effectively reducing nitrogen consumption and investment. Background technique [0002] Depending on the nature of the materials in the oil storage tank area of ​​petrochemical enterprises, some toxic and combustible oil storage tanks must be equipped with a nitrogen sealing system. Nitrogen sealing of storage tanks can effectively reduce the direct contact of oil products with air, reduce the risk of product deterioration, reduce the safety risks caused by toxic and combustible gases, and reduce the volatility of oil and gas to reduce environmental pollution. At present, when nitrogen sealing of oil storage tanks in China is set up, each nitrogen sealing tank is a self-contained system, and all nitrogen sealing tanks cannot be considered as a whole. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D90/44
CPCB65D90/44
Inventor 米云龙肖珊何小芳成小玲周蕊黄越
Owner 宝塔国际石化工程技术有限公司
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