Novel fluidized bed semicoke production system and process thereof

Abstract

The invention discloses a novel fluidized bed semicoke production system and a process thereof. The novel fluidized bed semicoke production system comprises a drying system and a dry distillation system, wherein the feed end of the drying system is connected with a feeding device, the tail gas of the drying system is reclaimed after passing through at least one stage of drying and dust removing device, and the drying system is connected with a heat source; both the discharge end of the drying system and the discharge end of the drying and dust removing device are connected with the feed end of the dry distillation system; and after passing through at least one stage of dust removing device, one path of the pyrolysis gas of the dry distillation system is used as the fluidizing medium of the dry distillation system for closed circulation, one part of the other path passing through at least one stage of condensing device is evacuated, the other part is burnt and then used as the heat source of the system, and the discharge end of the dry distillation system is connected with a finished product area. After lignite is processed and upgraded by adopting the technology, low-temperature semicoke as solid fuel and low-temperature coal tar as a derivative with good stability, low sulfur content and high heat value can be produced. Meanwhile, the novel fluidized bed semicoke production system has high heat utilization ratio, no environment pollution and high comprehensive utilization level of resources, can be continuous and stable to operate and realizes large-scale production.

Description

technical field [0001] The invention provides a novel fluidized bed semi-coke production system and its technology, namely, the technology of producing semi-coke by using a fluidized bed to carry out low-temperature dry distillation of lignite and other coal types. Background technique [0002] Semi-coke, commonly known as semi-coke, is named for its short blue flame when it burns. It is a solid product obtained by dry distillation of peat, lignite and high-volatile bituminous coal at low temperature (500-700°C). With high volatile content, it is a very good smokeless fuel with high calorific value. It can completely replace and be superior to ordinary coke in ferroalloy, calcium carbide, chemical fertilizer and other industries. Development potential. [0003] Lignite is one of the most widely distributed coal types in my country. It is shallowly buried and easy to mine. The production and application of lignite semi-coke can greatly alleviate the shortage of bituminous co...

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Problems solved by technology

[0007] (3) The R&D of semi-coke production is backward, the process technology is single, and the large-scale technical equipment is immature

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