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A new technology for drying briquette or semi-coke passivation and refining of lignite

A new process and drying technology, which is applied in the field of solid product-semi-coke passivation and refining, can solve problems such as system security threats, and achieve the effects of reducing activity, product stability, and reducing dust generation

Active Publication Date: 2016-04-13
TIANHUA INST OF CHEM MACHINERY & AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process needs to strictly control the oxygen content to prevent overoxidation; at the same time, the semi-coke contains a large amount of carbon powder, and the addition of air (or oxygen) poses a threat to the safety of the system

Method used

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  • A new technology for drying briquette or semi-coke passivation and refining of lignite
  • A new technology for drying briquette or semi-coke passivation and refining of lignite

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Embodiment Construction

[0016] The present invention will be further explained in conjunction with the drawings:

[0017] Reference attached figure 1 , 2 , The lignite dried coal or semi-coke is added to the impregnator 2 from the star-shaped rotary valve 1. The impregnator 2 is a rotary cylinder impregnator with built-in nozzles, and the lime water is sprayed evenly through the nozzles in the rotary impregnator 2. Into the rotary macerator 2, the lignite dried coal or semi-coke and the lime water are evenly contacted in the rotary macerator and the surface is impregnated, and discharged from the discharge box into the refiner 3. The refiner 3 is the roof filling Tower; lignite dry briquette or semi-coke impregnated with lime water in the refiner 3 is fully contacted with low-temperature flue gas from the hot blast stove 5 at a temperature of 80 ℃, and the obtained lignite dry briquette or semi-coke is obtained from the bottom of the refiner 3 The star-shaped rotary valve 4 is discharged; the dust-conta...

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Abstract

The invention relates to a new technology for passivation refining of dried formed coal or semi coke of lignite. The technology comprises: adding dried formed coal or semi coke of lignite into a dipping apparatus, also uniformly spraying lime water into the dipping apparatus, enabling the lignite dried formed coal or semi coke subjected to dipping to enter a refiner, then introducing low-temperature flue gas into the refiner by a hot air furnace to perform sufficient contact refining, so as to obtain the product after refining is finished. Calcium hydroxide in lime water and carbon dioxide in flue gas are reacted for forming calcium carbonate, calcium carbonate fills micropores of the lignite dried formed coal or semi coke, and a calcium carbonate protective membrane is formed on the surface of the lignite upgraded coal or semi coak, so that the activity of the lignite dried formed coal or semi coke is reduced, and the purpose of passivation refining is realized. The technology is capable of reducing generation of lignite upgraded coal or semi coke, and the obtained product is stable and suitable for long-distance transportation.

Description

Technical field [0001] The invention relates to a new technology for the passivation and refining of semi-coke, which is a solid product obtained by a lignite dry briquette or a low-temperature pyrolysis (dry distillation) process of lignite. Background technique [0002] my country is rich in coal resources, but the utilization of coal resources is still in a low-efficiency and high-emission stage where combustion is the mainstay; in recent years, the amount of lignite resources and proven reserves in my country has been increasing, and the comprehensive and efficient utilization of coal resources, especially lignite It becomes increasingly important. Lignite pyrolysis (dry distillation) upgrading refers to the process (method) in which coal is heated in isolation of air (or in a non-oxidizing atmosphere), and pyrolysis reaction occurs, and finally tar, coal gas and semi-coke are obtained. The optimized combination of lignite pyrolysis and related processes or products can impro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L9/00
Inventor 赵旭谭永鹏詹仲福高妍
Owner TIANHUA INST OF CHEM MACHINERY & AUTOMATION