Integral process for oil shale retorting oil refining and coal-char combustion power generation

A combustion power generation and oil shale technology, applied in combustion engines, coke ovens, petroleum industry, etc., can solve the problems of large solid heat loss, high energy consumption, excessive environmental pollution, etc., and achieve high comprehensive utilization and high heat transfer effect Good, high heat utilization effect

Inactive Publication Date: 2008-02-06
NORTHEAST DIANLI UNIVERSITY +1
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Problems solved by technology

The disadvantages of the existing carbonization furnace-based process route for carbonization and refining are: ① Usually, about 20% of the total clastic shale below 8 mm is discarded; ② The refining yield is 63-90%, and 10- 37% of shale oil loss; ③The calorific value of the semi-coke of the solid residue after dry distillation is still 2500-5000kJ/kg, and the heat loss of the solid is large; ④The environmental pollution of slag discharge, waste gas and sewage exceeds the standard
This brings about three major problems: First, due to the use of massive shale, the retort time is quite long, generally 12 to 24 hours, and due to the large size of the particles, many large particles cannot be completely retorted. There are black cores, so the shale carbonization efficiency is low, the oil yield rate is low, and the utilization rate is low; the second is to use hot gas as the heat carrier for carbonization, which requires an external heat source to heat the gas. Usually, a regenerative heating furnace is used, that is, the regenerative heating furnace is first used The gas is burned in the heating furnace to heat the furnace body, and then the cold gas is sent into the heating furnace to transfer the heat of the furnace body to the cold gas. After heating, it is sent to the carbonization furnace to heat the oil shale carbonization, so it not only consumes a lot of gas , a waste of ener

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  • Integral process for oil shale retorting oil refining and coal-char combustion power generation

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Embodiment Construction

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022]Referring to Figure 1, the integrated process of oil shale dry distillation refining and semi-coke combustion power generation, the oil shale raw ore 1 is broken into 0-15mm particles by the crusher 2, and a part of the oil shale particles are sent to the oil shale feed hopper through the belt 3a, another part of the oil shale particles is conveyed to the nitrogen-sealed screw feeder 9b through the belt; the oil shale particles are sent into the sealed mixer 8 by the screw feeder 9b, and the oil shale particles in the mixer 8 Mix with the circulating ash from the circulating fluidized bed return device 7 at a temperature of 750-850°C, the weight mixing ratio is oil shale: circulating ash is 1:2-3, and the mixture of oil shale and circulating ash passes through the conveying pipe 10 Send it into the drum type carbonization furnace 11; in the drum t...

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Abstract

The present invention discloses an oil shale carbonization oil refining, carbocoal burning electricity generating integrated technology. The present invention is characterized in that green ore oil shale is crushed into 0 to 15mm grains by a crusher, through that circulating fluid bed boiler circulating ash is used as a solid heat carrier, the mixture of the oil shale and the circulating ash is fed into a roller retort to form oil shale oil refining, carbocoal and the oil shale are mixed, fluidized and burned to generate electricity as a whole, separated non-condensation carbonization coal gas is fed into the circulating fluid bed boiler and the both are burned with the carbocoal and the oil shale together or is fed into a gas engine for direct-fired power generation; the carbon content of the clinker after burned on the circulating fluid bed is less than 2 percent, thus no further roasting is necessary, and the present invention can be directly used as building raw material; the thermal value of produced carbonization coal gas which can be directly used as fuel to feed into the boiler for burning is high, the quantity of heat released through burning can be transferred to the water through the heated surface of the boiler, the water is heated into a overheat steam to be used as out-supplied working substance and/or to be fed into a steam turbine for power and electricity generating. The present invention has the advantages that the comprehensive utilization degree is high, the cost is low, the technology is scientific and reasonable, etc.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of oil shale resources, and is an integrated process of oil shale dry distillation, refining, and semi-coke combustion for power generation. The integrated process can also be used for coal and biomass. Background technique [0002] Oil shale is an important energy resource. Using oil shale as an energy source, it can be converted into shale oil and electricity at the same time; it can also be used as a resource to convert ash residue into building materials, and finally achieve no solid waste discharge. The best way to comprehensively utilize shale. [0003] The existing process routes for the development and utilization of oil shale: one is to adopt the process route based on retort furnace for dry distillation and refining; the other is to adopt the process route based on circulating fluidized bed boiler combustion power generation. The disadvantages of the existing carboniz...

Claims

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Application Information

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IPC IPC(8): C10B53/06C10G1/00F02B45/02F02B63/04F01D15/10
CPCY02T10/34Y02T10/30
Inventor 李少华王擎刘洪鹏柏静儒孙佰仲孙键
Owner NORTHEAST DIANLI UNIVERSITY
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