A system and method for converting biomass feedstock into clean diesel

A biomass raw material and biomass technology, which is applied in the preparation of waste fuel, liquid hydrocarbon mixture, and the treatment of hydrocarbon oil, etc., can solve the problems of fluid drift, multiple equipment, and high energy consumption of tail gas circulation.

Active Publication Date: 2020-10-27
CHINA PETROLEUM & CHEM CORP +1
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Chinese patent CN101845319B discloses a process for producing wax and fuel oil using biomass as raw material, which is characterized in that the biomass is gasified by the oxygen method, and the synthesis gas is used for Fischer-Tropsch synthesis after tar reintegration and purification, using a three-stage fixed-bed reaction Fischer-Tropsch synthesis is carried out in the form of series reactors, but the process is complex, the process is long, more equipment is required, and the investment is larger
Chinese patent CN102703107B discloses a method for producing liquid hydrocarbons from biomass, which is characterized in that the synthesis gas obtained from biomass gasification is mixed with hydrogen, and after dehydration and decarburization, Fischer-Tropsch synthesis is carried out, most of the tail gas is recycled, and a small amount of tail gas is used for Combustion power generation. In this method, the mixing ratio of hydrogen and syngas is 1.1 to 1.7. It needs to be matched with a large hydrogen production device, and a large amount of tail gas cycle consumes high energy consumption.
However, the distribution of fluid, especially the distribution of fluid between multi-layer reaction plates, is not considered, and it is easy to generate fluid drift

Method used

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  • A system and method for converting biomass feedstock into clean diesel
  • A system and method for converting biomass feedstock into clean diesel
  • A system and method for converting biomass feedstock into clean diesel

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Experimental program
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Effect test

Embodiment 1

[0061] use figure 1 The system shown, processes biomass feedstock. The biomass raw material is corncob. After crushing and drying, the corncobs are fed into the fluidized bed gasification furnace in the form of particles with a diameter of 15 mm. The air-steam feed equivalence ratio is 0.3, the reaction temperature is 950 ° C, and the reaction pressure is 0.5 MPa. The composition of the obtained crude synthesis gas is shown in Table 1. The crude synthesis gas passes through the purification unit to remove the sulfur in the synthesis gas, and the removed tar is used as fuel oil for heating. The purified syngas is pressurized and enters the Fischer-Tropsch synthesis reaction unit. The reaction is carried out in the Fischer-Tropsch synthesis reactor described in the present invention. Fischer-Tropsch synthesis reactor as attached figure 2 shown. The reactor is processed by plate brazing method. Respectively process the reaction channel layer plate, the fluid channel layer...

Embodiment 2

[0076] In the Fischer-Tropsch synthesis reaction unit, react in the Fischer-Tropsch synthesis reactor of the present invention, and the Fischer-Tropsch synthesis reactor is as figure 2 shown. The Fischer-Tropsch synthesis reactor is processed by plate brazing method. Respectively process the reaction channel layer plate, the fluid channel layer plate, the upper cover plate and the lower cover plate. The reaction channel is a linear channel with a length of 100 mm, a width of 10 mm, a depth of 1 mm, and a left and right interval of 5 mm. The fluid channel is 60mm long and 1mm deep, and adopts a scaled shape, such as figure 2 As shown, the maximum width is 8mm and the minimum width is 5mm. 1 upper cover plate, 10 reaction channel laminates, 11 fluid channel laminates, and 1 lower cover plate are welded together by high-temperature brazing, and the brazing material is alloy Al-20Cu-10Si-2Ni. Reactor unit specific surface area 1100m 2 / m 3 , the ratio of fluid channel area...

Embodiment 3

[0079] In the Fischer-Tropsch synthesis reaction unit, react in the Fischer-Tropsch synthesis reactor of the present invention, and the Fischer-Tropsch synthesis reactor is as Figure 4 shown. The reactor is processed by high-temperature diffusion welding of plates. Respectively process the reaction channel layer plate, the fluid channel layer plate, the upper cover plate and the lower cover plate. The reaction channel is a linear channel with a length of 400 mm, a width of 10 mm, a depth of 1 mm, and a left and right interval of 5 mm. The fluid channel is 400mm long, 5mm wide, and 1mm deep, and adopts a broken line shape, such as figure 2 As shown, the angle of the broken line is 105°, the length of the broken line unit is 20mm, the length of the straight channel at both ends is 10mm, and the channel interval is 5mm. 1 upper cover plate, 10 reaction channel laminates, 11 fluid channel laminates, and 1 lower cover plate are welded together by high temperature diffusion wel...

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Abstract

The invention discloses a system and method for converting a biomass raw material into clean diesel. The system comprises a biomass gasification unit, a synthetic gas purification unit, a Fischer-Tropsch synthesis reaction unit, a hydrofinishing unit and a hydroisomerization cracking unit. The system has the advantages of simple processes, high integration, high energy efficiency and good economy.The system and method realize efficient conversion and utilization of biomass.

Description

technical field [0001] The present invention relates to a system and method for converting biomass feedstock into clean diesel. Background technique [0002] As a new type of environmentally friendly alternative fuel, biofuel will be a good choice to reduce dependence on fossil fuels and alleviate greenhouse gas emissions. Biomass can be converted through biochemical conversion, pyrolysis, Fischer-Tropsch synthesis, and hydrodeoxygenation technologies, among which Fischer-Tropsch synthesis is currently considered to be a more mature and economical technical route. The main process is that biomass is converted into synthesis gas containing hydrogen and carbon monoxide through thermochemical process, and then generates hydrocarbons through Fischer-Tropsch synthesis reaction. After further processing, high-quality liquid fuels can be obtained from hydrocarbons. [0003] Chinese patent CN101845319B discloses a process for producing wax and fuel oil using biomass as raw material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/02C10G2/00C10G67/14
CPCC10G2/341C10G67/14C10G2300/1011C10G2300/1022C10G2400/04C10G2400/06C10J3/02C10J2300/092C10J2300/0956C10J2300/0976C10J2300/1659Y02E50/30
Inventor 徐润牛传峰胡志海夏国富侯朝鹏田鹏程孙霞
Owner CHINA PETROLEUM & CHEM CORP
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