A Dry Distillation Equipment for Dry Coke Gas Heat Carrier Oil Shale

Abstract

The invention discloses oil shale distillation equipment employing a dry coke extract gas heat carrier. The oil shale distillation equipment is characterized in that a charging surge bin and a control gate valve for controlling the charging surge bin to feed and discharge are arranged at the top of a dry distillation furnace; a constant-temperature dry distillation section is arranged between a dry distillation section and a semicoke cooling section of the dry distillation furnace; distributors are respectively arranged on the dry distillation section, the constant-temperature dry distillation section and the semicoke cooling section; two coke extract surge bins with coke extract gate valves are arranged at the bottom of the dry distillation furnace; and air sealing devices are respectively arranged on the two coke extract surge bins. The oil shale distillation equipment has the advantages of being reasonable in structure, complete in dry distillation, free of leakage of gas and oil gas, free of pollution to environment, low in semicoke oil content, high in oil yield, and the like, and is suitable for dry distillation of 10-100mm of oil shale blocks; and the processing capacity is 500t per day.

Description

technical field [0001] The invention belongs to oil shale retort equipment, in particular to an oil shale retort equipment for dry coke exhaust gas heat carrier. Background technique [0002] At present, there are three kinds of massive oil shale retort refining equipment widely used at home and abroad. The first is Fushun Furnace with generation section, processing 12-75mm massive oil shale, with a daily processing capacity of 100 tons, wet coke discharge, semi-coke is difficult to use, semi-coke stacking pollutes the environment, and the heat required for dry distillation is generated by circulating gas and generation The section flue gas and generated gas are provided, the heat supply of the retort section is insufficient, there is oil burning in the retort, the oil content of semi-coke is 0.4-0.5%, the retort is incomplete, and the oil yield of the aluminum retort method is 60-65%. The second is the oil shale gas full-cycle retort furnace with a daily processing capacit...

AI Technical Summary

Problems solved by technology

The first is Fushun Furnace with generation section, processing 12-75mm massive oil shale, with a daily processing capacity of 100 tons, wet coke discharge, semi-coke is difficult to use, semi-coke stacking pollutes the environment, and the heat required for dry distillation is generated by circulating gas and generation The supply of flue gas and generated gas in the section, the heat supply in the retort section is insufficient, and there is oil burning in the retort, the oil content of semi-coke is 0.4-0.5%, the retort is incomplete, and the oil yield of the aluminum retort method is 60-65%

The second is the oil shale gas full-cycle retort furnace with a daily processing capacity of 300 tons by Liaoning Chengda Hongsheng Energy Research Institute Co., Ltd., which can process 6-50mm massive oil shale, wet coke discharge, and the utilization of semi-coke is difficult

The third is the Petrosix retort furnace in Brazil, which processes 6-50mm massive oil shale, with a daily processing capacity of 6,000 tons. The heat required for retort is provided by circulating gas, and the oil recovery rate can reach 90% %, the disadvantage is that the coke discharge method is wet coke discharge, and the semi-coke is not used, polluting the environment

[0003] The common problems of the above three dry distillation furnaces are wet slag discharge, semi-coke is difficult to use or not used, and pollutes the environment

At present, the heat supply of retort furnaces used in China is insufficient, resulting in incomplete retort distillation of oil shale, and high oil content of semi-coke, which is the main reason for the low oil recovery rate of oil shale refining.

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