Combined process and device for separating catalytic cracked dry gas
A catalytic cracking and combined process technology, which is applied in the processing of gas mixtures, hydrogen separation, hydrocarbons, etc., can solve the problems of narrow adaptability of raw materials, single recovery target, and high energy consumption per unit of production, so as to reduce the difficulty of operation and dry Gas volume, good economic benefits and environmental benefits
Inactive Publication Date: 2014-12-24
DALIAN JUYANG TECH
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Problems solved by technology
[0003] Most of the domestic refineries are extensive production, and the refinery gas separation device generally adopts a single technology, but there are narrow adaptability of raw materials, single recovery target, low recovery rate, single Disadvantages such as high production and energy consumption
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[0010] As shown in Figure 1, it is a schematic block diagram of the device structure for separating catalytic cracking dry gas, including buffer tank 1, compressor 2, gas-liquid separator 3, filter 4, heater I5, heater II6, heater III7, heating Device IV8, hydrogen membrane system 9, refrigeration compressor 10, cold box 11, organic vapor membrane 12, demethanizer 13, deethanizer 14, fuel gas pipeline network 15.
[0011] The collected catalytic cracking dry gas first enters the buffer tank 1 to stabilize the pressure and remove the liquid, then enters the compressor 2 for pressurization, and the pressurized gas enters the gas-liquid separator 3 for gas-liquid separation, and the liquid hydrocarbons are heated by the heater I5 After entering the fuel gas pipeline network 15 for recovery, the mixed gas enters the filter 4 to remove solid particles and heavy hydrocarbons in the gas, and is heated by the heater II6 to 10-20°C higher than the dew point to obtain clean and warm gas,...
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The invention provides a combined process and a device for separating a catalytic cracked dry gas, relates to the technical field of petroleum and chemical engineering, and in particular relates to a method and a device for simultaneously recycling the catalytic cracked dry gas in a multi-purpose manner by using a membrane separation and deep cold separation coupling technique. The device comprises a buffer tank, a compressor, a gas-liquid separator, a filter, a heater I, a heater II, a heater III, a heater IV, a hydrogen membrane system, a refrigeration compressor, a refrigerator, an organic steam membrane, a demethanizer, a dethanizer and a fuel gas tube net. The device takes the place of a simple deep cold separation process, is small in space, small in investment and simple in structure, has good economic benefits, social benefits and environment benefits, and can be used in the petroleum chemical engineering industry, and the recycling rate of hydrogen and light hydrocarbon is greater than 99%.
Description
technical field [0001] The invention relates to the technical fields of petroleum and chemical industry, in particular to a device for simultaneously recovering dry gas from catalytic cracking with multiple targets by utilizing membrane separation and cryogenic separation coupling technology. Background technique [0002] Petroleum has become a weapon in the economic, military and political struggles of the world's major powers, and its limited reserves and increasing demand have become the most concerned issues for everyone. In the process of petroleum processing, a large amount of hydrogen and light hydrocarbons such as methane, ethane, propane and other refinery tail gas will be produced. The tail gas contains a large amount of high value-added substances. How to comprehensively utilize refinery gas resources is a necessary means to improve refinery processing depth and economic benefits. [0003] Domestic refineries are mostly extensive production, and refinery gas sepa...
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IPC IPC(8): C10G70/04C01B3/50C07C9/04C07C9/06C07C7/00C07C7/144
Inventor 李有森王婷婷
Owner DALIAN JUYANG TECH