Step-by-step dewatering method for biomass pyrolysis liquid hydrogenation combined device

Abstract

The invention discloses the technical field of biomass pyrolysis liquid hydrogenation and relates to a step-by-step dewatering method for a biomass pyrolysis liquid hydrogenation combined device. Themethod comprises the following steps: (1) a biomass pyrolysis liquid raw material of a biomass pyrolysis liquid hydrogenation deoxidation device firstly passes through a deep dewatering unit; (2) a BDO device reaction product enters a modified BDO cold high pressure separator to be primarily dewatered; (3) an OTM device reaction product enters a modified OTM cold high pressure separator to be primarily dewatered; (4) naphtha and light diesel oil products are finally treated by a deep dewatering device to be delivered out of factory. According to a technological process of the method, the biomass pyrolysis liquid raw material of the biomass pyrolysis liquid hydrogenation deoxidation device, an intermediate product and a final product are dewatered step by step. By means of a step-by-step dewatering technology, operation energy consumption of the biomass pyrolysis liquid hydrogenation combined device is remarkably reduced, product quality is greatly improved, stable operation time of thedevice is greatly prolonged, and economical benefits of the whole set of device are improved.

Description

[0001] The present invention requires Chinese application number: 201710665214.4 application date: 2017-08-04, and the name is a method for step-by-step dehydration of a wood tar hydrogenation unit as a Chinese priority. technical field [0002] The invention belongs to the field of oil dehydration of bio-crude oil hydrogenation gasoline and diesel equipment, and specifically relates to a method for distributed dehydration of a biomass pyrolysis liquid hydrogenation combined device, specifically, for the biomass pyrolysis liquid hydrogenation combined device Raw materials, intermediate products, and final products are subjected to deep dehydration treatment to achieve the goal of low energy consumption and stable operation of the biomass pyrolysis liquid hydrogenation unit. Background technique [0003] Energy is an important material basis for maintaining the stable survival and long-term development of human beings. With the extensive exploitation and use of human beings, n...

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Problems solved by technology

[0011] The electrostatic dehydration method refers to the electrostatic demulsification of the crude oil emulsion under the action of an electrostatic field, so that the water droplets quickly coalesce and grow under the action of gravity or centrifugal force to achieve the purpose of oil-water separation, but the electric field dehydration method has obvious defects: The energy consumption of the equipment is relatively high, and there are potential safety hazards in operation

[0018] The patent ZL01823742.8 oil dehydrator discloses a method of dehydrating oil by using a membrane, but there are problems of high cost of use and easy pollution and damage; the patent application number 200810042145.2 discloses a method and device for dehydrating diesel oil. The cyclone method is used for separation. Due to the technical characteristics of cyclone separation, it is only suitable for the separation of free water droplets above 15 μm, and the operating pressure drop is large, which cannot achieve deep dehydration of oil products with high efficiency and low consumption; patent ZL201010145423.4 A heavy oil and coal tar dehydrator is disclosed, which uses drum evaporation for dehydration, which has relatively high energy consumption and complicated operation, and is only suitable for the oil dehydration process of specific media. ZL200910065725.8 discloses a dehydration method using electric field and devices, patent 201010261697.X discloses a method and device for dehydration using ultrasonic technology, and patent application number 201310352748.3 discloses a method for dehydrating heavy dirty oil using the method of filtration-swirl-coalescence-swirl , the above patented technologies are only applicable to specific occasions, and all have the problems of high energy consumption and narrow application range, and cannot meet the requirements of deep dehydration of oil products

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