Burning device and process for oil shale fluidized bed

Abstract

The invention relates to a device and craft for using fluidized bed to burn kerogen. The raw oil and kerogen are transmitted into the boiler combustion device through the transmission system. The device includes fluidized bed boiler, vortex separator, and ash particle combustion system and ash dredge reclaiming device. In the boiler, the hot wind enters with small aperture speed and hot fluidized speed through the directional cap, the wind is divided into the first wind and the secondary wind; the wind quantity can be adjusted, maintains the stability of the bed and homogeneity of temperature, the temperature is maintained between 850deg.C-920deg.C. The smoke is separated through the separator, the raw particle returns into the furnace to be burned, the residue tail gas reclaims heat through several heat exchangers, and the ash dredge in the furnace is discharged out of the dredge colder with high wind quantity and pressure through the electric dust eliminator, which can be used as cement mixing material. The combustion intensity and efficiency are high, the contamination is little.

Description

technical field [0001] The invention relates to a process for comprehensive utilization of kerogen shale, in particular to a device and process for realizing comprehensive utilization of kerogen shale through fluidized bed combustion. Background technique [0002] Kerogen shale is a clay rock or marl with a low combustion value. As a by-product of coal mines, it was once used as a raw material for refining petroleum, but due to the high cost of dry distillation, it has no practical application significance. Because kerogen shale is a low-quality fuel with high ash content, high volatile components, and low calorific value, it contains aluminum, silicon, iron and other substances, and the ash content is composed of SiO 2 with Al 2 o 3 Mainly, suitable for building materials. The existing comprehensive utilization process focuses on using its slag or slag as cement raw material or making unburned bricks, and also mixes kerogen shale oil into heavy oil to produce fuel oil. ...

AI Technical Summary

Problems solved by technology

In fact, the use of existing equipment and technology for oil shale combustion has the problems of easy coking and ash formation, as well as problems such as difficult combustion, incomplete combustion, and low utilization value of ash residue; or it needs to be equipped with high bituminous coal It is difficult to make full use of the calorific value and ash content of oil shale to achieve the purpose of efficient comprehensive utilization

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