Low-cost and pollution-less biomass liquefying process and equipment

A biomass and non-polluting technology, applied in the petroleum industry, the preparation of liquid hydrocarbon mixtures, etc., can solve the problems of complex liquefier structure, environmental secondary pollution, unfavorable industrialization, etc., and achieve easy popularization and application without secondary pollution , low cost effect

Inactive Publication Date: 2003-05-14
UNIV OF SCI & TECH OF CHINA
0 Cites 18 Cited by

AI-Extracted Technical Summary

Problems solved by technology

The common disadvantages in the prior art are: (1) high-quality energy is consumed to heat the intermediate heat carrier, which makes the liquefaction cost higher and unfavorable for industrialization; (2) the solid heat carrier a...
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Abstract

The present invention relates to biomass utilizing treatment, especially the technological process and equipment to utilize biomass in producing liquid fuel. The gasified product of biomass is utilized in heating, so that the biomass to be liquefied obtains heat without using intermediate solid heat carrier. The complete liquefied process includes mixing of crushed biomass with biological gas, cracking of the crushed biomass, the separation between and collection of the biological oil and the biological gas. The liquefying equipment consists of mainly biomass gasifying furnace, biomass liquefier, gas-solid separator and condensator. The process of the present invention is resonable technologically, simple in equipment structure, has no secondary pollution and other advantages.

Application Domain

Liquid hydrocarbon mixture production

Technology Topic

Heat carrierProcess engineering +3

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  • Low-cost and pollution-less biomass liquefying process and equipment
  • Low-cost and pollution-less biomass liquefying process and equipment
  • Low-cost and pollution-less biomass liquefying process and equipment

Examples

  • Experimental program(1)

Example Embodiment

[0013] Further description will be made below in conjunction with the embodiments and accompanying drawings.
[0014] Gasifier 1 adopts the existing fixed bed downdraft type, with a rated gas production of 400m 3 /hr, the temperature of the outlet gas can be adjusted by changing the air volume of the most downstream fan (550°C in this example). The high-temperature anaerobic combustible biogas from the outlet of the gasifier is directly introduced into the bottom of the liquefier 4 (the feeding rate is about 400kg/hr according to the rated gas production), and at the same time, the crushed biomass in the raw material cylinder 2 (using 0.8mm or so sawdust) is also sent into the bottom of the liquefier via the screw material conveyor 3 (the feeding rate is 150kg/hr). According to the feeding rate of the aforementioned pulverized biomass and biogas, it can be seen that the mass mixing ratio of the two is about 1:2.7. The liquefier is made of stainless steel and is in the shape of a cylinder with equal diameters. The inner wall is smooth. The inner diameter is 300mm and the height is 4m, which determines that the flow velocity of the gas-solid two-phase flow in the liquefier is about 4m/ s, the flow time is 1s. The gas-solid separator 5 adopts a cyclone separator (the specific size is determined by the gas flow rate), the spray head 7 is a commonly used spray head, the cooling water pipe 8 is a copper cooling coil, and the oil pump 9 has a flow rate of 4m 3 /hr gear pump, the material collector 12 is a steel rectangular structure (volume is 0.2m 3 ), the condenser 6 is a vertical single-stage condensation tower, the liquid outlet 11 is connected to the container for storing bio-oil, and the flow rate of the fan connected to the gas outlet 10 is 400m 3 /hr Roots blower. When the device works for the first time, 100 kg of industrial alcohol should be preset in the condenser to replace bio-oil.
[0015] Experiments show that the biomass liquefaction process and device provided by the present invention have a bio-oil yield of about 50wt%, a charcoal yield of about 20wt%, and an output cost that is only about half of the output income.

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