A kind of recovery method and equipment of refinery dry gas
A technology for refining dry gas and recovery methods, which is applied in the fields of chemical instruments and methods, organic chemistry, hydrocarbons, etc., and can solve problems such as environmental pollution, energy waste of refining dry gas, etc., and achieve the effect of avoiding waste
Active Publication Date: 2015-08-05
陕西汇涓能源科技有限公司
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Problems solved by technology
[0002] Refining dry gas mainly refers to the tail gas that can be recycled and reused in the production process of petrochemical and related industries. The main components include hydrogen, nitrogen, light alkanes and light olefins, etc., but there is no good recycling in China Methods and equipment for recycling and reusing refining and chemical dry gas. Most petrochemical industries choose to discharge to fire cabinets for direct combustion or direct exhaust to the atmosphere. This will not only lead to waste of refining and chemical dry gas energy, but even waste of refining and chemical dry gas Harmful gas components can also cause environmental pollution
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Embodiment 3
[0043] The refining dry gas recovery equipment of the embodiment of the present invention can process 700Nm 3 Take the dry refining gas as an example, the volume percentages of the main components in the dry refining gas are: nitrogen 12%, hydrogen 25%, methane 25%, ethylene 23%, and the rest is C 3 Above light olefins and C 2 The above light alkanes and traces of carbon dioxide, the following table 1-3 shows the refining and chemical dry gas equipment under different working conditions such as temperature and other conditions for the treatment of different components in the refining dry gas and different components of dry gas can The achieved purity and other conditions are detailed in the following table 1-3:
[0044] Table 1 Gas component processing capacity and component purity in the first working condition
[0045]
[0046]
[0047] Table 2 Gas component processing capacity and component purity in the second working condition
[0048]
[0049] Table 3 Gas component processing c...
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The invention relates to the chemical industry field, in particular to a refined and chemical dry gas recycling method and device. The refined and chemical dry gas recycling method includes the following steps that firstly, refined and chemical dry gas is condensed until the temperature of the refined and chemical dry gas ranges from -80 DEG C to -40 DEG C to form first gas phases and first liquid phases, and the first liquid phases are collected; secondly, the first gas phases are condensed through liquid nitrogen until the temperature of the first gas phases ranges from -180 DEG C to -162 DEG C to form second gas phases and second liquid phases, rectification and purification are carried out on the second liquid phases to obtain methane and ethylene, and rectification and purification are carried out on the second gas phases to obtain hydrogen and nitrogen mixtures. According to the refined and chemical dry gas recycling method and device, components such as hydrogen, light alkane and light olefin in the refined and chemical dry gas can be well recycled, and waste of the refined and chemical dry gas and pollution to the environment can be avoided.
Description
Technical field [0001] The invention relates to the field of chemical engineering, and in particular to a method and equipment for recovering dry gas in refining and chemical engineering. Background technique [0002] Dry refining gas mainly refers to the recyclable tail gas produced in the production process of petrochemical and related industries. The main components include hydrogen, nitrogen, light alkanes and light olefins, but there is no good recovery in China. Methods and equipment to recycle and reuse refining dry gas, most petrochemical industries choose to discharge it into a fire cabinet for direct combustion or direct exhaust to the atmosphere. This will not only lead to waste of energy in the refining dry gas, but even the waste in the refining dry gas. Harmful gas components can also cause environmental pollution. Summary of the invention [0003] The purpose of the present invention is to provide a method and equipment for refining dry gas recovery to solve the ab...
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IPC IPC(8): F25J3/02C07C9/04C07C11/04C07C7/00C07C7/04
Inventor 王嘉文王飞
Owner 陕西汇涓能源科技有限公司