Safe and environment-friendly method for removing explosive oil gas of large-scale emptying oil tank

A safe, environmentally friendly and explosive technology, applied in medical science, dentistry, dental drilling, etc., can solve problems such as low efficiency, explosion accidents, and easy explosion, and achieve high efficiency, low flame temperature, and accelerated evaporation.

Inactive Publication Date: 2012-01-04
LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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Problems solved by technology

If it encounters various ignition energy sources such as high temperature, static electricity, and lightning, it will easily trigger an explosion and cause a catastrophic explosion accident, and the direct discharge of oil and gas is not conducive to environmental protection
Therefore, this direct ventilation operation method is not only extremely prone to explosions, which can lead to disastrous consequences, but als

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  • Safe and environment-friendly method for removing explosive oil gas of large-scale emptying oil tank
  • Safe and environment-friendly method for removing explosive oil gas of large-scale emptying oil tank

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Embodiment Construction

[0012] Further illustrate the present invention below in conjunction with accompanying drawing and a specific implementation process:

[0013] Drained 3000m 3 The oil tank is filled with oil gas with an oil gas concentration of 4%, and the oxygen concentration reaches 12% after 1-2 hours of inert replacement; at this time, the inert gas generation system is turned off, and the circulation pipeline is switched to the catalytic reaction system. The oil and gas that have been inerted first enter the heat exchanger. Before starting the catalytic reactor, use a preheater to heat the oil and gas so that the outlet temperature reaches 250-270 ° C. At this time, after the oil and gas mixture enters the catalytic reactor, the high temperature oil and gas mixture is ignited under the action of the catalyst. The high-temperature gas product after combustion enters the hot end of the heat exchanger to exchange heat with the newly entered oil and gas, and then circulates into the oil tank...

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Abstract

The invention relates to a safe and environment-friendly method for removing explosive oil gas of a large-scale emptying oil tank. The method comprises the following steps of: (1) carrying out an inert gas replacement treatment on the large-scale emptying oil tank or other large-scale limited spaces which are full of the oil gas and are located within the explosive limit, so as to lower the oxygen concentration of the large-scale emptying oil tank or the other large-scale limited spaces to 10-13%; (2) enabling the inert oil gas to pass through a heat exchanger and a preheater and then to enter a catalytic reactor, introducing high-temperature gas with the oil gas concentration which is lower than 0.1% into a wall-dividing type heat exchanger after the catalytic combustion is carried out so as to transfer heat quantity to new-entered inert gas, and then continuously carrying out replacement through circularly entering the oil gas into the oil tank or the other large-scale limited spaces; and (3) directly carrying out an air replacement emission treatment until the whole oxygen concentration recovers to an air normal concentration range when the oxygen concentration is lower than 0.5%. The method has the advantages of safety, high efficiency and environment protection, and the efficiency of hypoxia catalytic combustion processing under an inerting condition reaches 99%.

Description

technical field [0001] The invention relates to a safe and environment-friendly large-scale evacuated oil tank method for removing explosive oil and gas, which can be applied to oil-gas replacement and discharge treatment in large-scale evacuated oil tanks and other large confined spaces where the oil-gas concentration is within the explosive limit. Background technique [0002] The conventional treatment for vapor-filled large emptied oil tanks and other large confined spaces is air displacement. Ventilation work is faced with tens of thousands of m 3 Combustible and explosive gases and oil and gas volatilized from the "sludge" continuously. The ventilation technology currently in use is carried out under such explosive ambient conditions. The concentration of oil and gas during the whole process is generally within the explosion limit. If it encounters various ignition energy sources such as high temperature, static electricity, and lightning, it will easily trigger an ...

Claims

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Application Information

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IPC IPC(8): A62C2/04A62C3/06
Inventor 杜扬钱海兵王培文周琳莉周建忠
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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