Oil-washing energy-saving device of condensing recovery system by oil shale carbonization method and operation process thereof
A technology for condensation recovery and energy-saving devices, which is used in the petroleum industry, special forms of dry distillation, and the preparation of liquid hydrocarbon mixtures. Effect
Active Publication Date: 2012-11-14
TIANJIN UNIV
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The processes described in the above technologies all have the disadvantages of complicated process and high energy consumption.
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[0016] Such as figure 1 Shown: the oil shale dry distillation process condensation recovery new technology of the present invention is realized by the following measures: after the oil shale passes through the dry distillation furnace 1, the raw coal gas first enters the dust removal chamber (static dust removal) and the cyclone dust removal equipment to remove most of the dust . The raw coal gas 2 after cyclone dust removal enters an oil washing fractionation tower 3 in the form of a high-temperature gas phase at 400-600 ° C, including packing, liquid distributor and other tower internals, which can complete the cooling, separation and oil shale recovery process. The oil washing fractionation tower has 5-50 theoretical plates, the temperature at the top of the tower is 40-100°C, and the temperature at the bottom of the tower is 150-300°C. Raw coal gas is fed from the middle and lower parts of the fractionation tower, the middle section is circulated, and the top of the tower...
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The invention relates to an oil-washing energy-saving device of a condensing recovery system by an oil shale carbonization method and an operation process thereof. The device comprises a carbonization furnace (1), an oil-washing fractionating tower (3) and a water-washing tower (13), wherein the oil-washing fractionating tower (3) is provided with a circular middle section; a separation inner piece is arranged at the upper two-thirds section of the oil-washing fractionating tower (3); and an anti-clogging plug and an anti-coking inner piece are arranged at the lower one-third section of the oil-washing fractionating tower (3). High-temperature crude coal gas coming out from the top of the carbonization furnace (1) is not cooled and directly enters the oil-washing fractionating tower (3); coal gas and white oil come out from the top of the oil-washing fractionating tower (3), pass by a condenser at the tower top and enter the water-washing tower (13); naphtha and shale oil flow out from the sidetrack of the oil-washing fractionating tower (3) to form products; and heavy-oil products flow out from the bottom of the oil-washing fractionating tower (3), wherein part of heavy oil passes by the condenser at the tower bottom so that high-temperature heat is taken away before the heavy oil circularly enters in the oil-washing fractionating tower (3) in the same position as the crude coal gas. The invention greatly reduces wastewater production amount, can recover most of high-temperature heat, achieves the aims of improving the recovery rate and the quality of the shale oil and obtains qualified products.
Description
technical field [0001] The invention relates to an oil washing energy-saving device and an operation process of an oil shale carbonization recovery system, in particular to an oil washing energy-saving process for condensation recovery. Background technique [0002] The domestic and foreign research and actual projects on condensate recovery are mainly divided into water washing and oil washing. The water washing process mainly refers to the process after the coal dry distillation process. The raw coal gas at 490 °C from the dry distillation workshop enters the quenching pipe and the gas washing pipe. In the scrubbing pipe, the temperature of the gas is reduced from 490°C to 80-90°C, and 50%-60% of the tar gas is condensed. The raw coal gas after quenching and scrubbing enters the gas-liquid separator, where the gas is separated from tar, ammonia water, tar residue, etc. The separated tar, ammonia water and tar residue enter the mechanized ammonia water clarification tank t...
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IPC IPC(8): C10B53/06C10G1/02
Inventor 隋红黄国强李鑫钢丁辉李洪
Owner TIANJIN UNIV