High-efficiency coupling, polygeneration, and low-nitrogen coal gangue activation process

A technology of coal gangue and polygeneration, which is applied in the chemical industry, control/regulation process, inorganic chemistry, etc., can solve the problems of unfriendly environment, less large-scale industrial application, and low utilization rate of coal gangue.

Active Publication Date: 2021-03-23
辽宁盛达环保科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The utilization rate of existing coal gangue is extremely low, and there are few large-scale industrial applications. The comprehensive utilization of coal gangue first needs to activate the coal gangue, and then can produce chemical products. Inventions can change the existing industrial utilization status and improve the quality of craftsmanship

Method used

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  • High-efficiency coupling, polygeneration, and low-nitrogen coal gangue activation process
  • High-efficiency coupling, polygeneration, and low-nitrogen coal gangue activation process
  • High-efficiency coupling, polygeneration, and low-nitrogen coal gangue activation process

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Comparison scheme
Effect test

Embodiment 1

[0065] A high-efficiency coupling, multi-generation, low-nitrogen coal gangue activation process of this embodiment, the steps include:

[0066] Step A. Carrying out extensive preheating treatment of coal gangue raw material to obtain:

[0067] - The first coal gangue with a moisture content lower than 0.8%;

[0068] Specifically, the wide-width preheating treatment adopts the wide-width preheating technology of coal gangue: the coal gangue mined in the mining area is transported to the site, after preliminary crushing, it enters the rotary preheater, and the moisture content of the coal gangue is reduced. to below 0.8%.

[0069] Specifically, step A includes:

[0070] Step A1. The coal gangue raw material is subjected to primary crushing to obtain primary crushed particles with a particle size ranging from 20 mm to 50 mm; the particle size of the primary crushed particles in this embodiment is 20 mm.

[0071] Wherein, the primary crushing is carried out in the pulverizer 1...

Embodiment 2

[0108] A high-efficiency coupling, multi-generation, low-nitrogen coal gangue activation process of this embodiment, the steps include:

[0109] Step A. Carrying out extensive preheating treatment of coal gangue raw material to obtain:

[0110] - The first coal gangue with a moisture content lower than 0.8%;

[0111] Specifically, the wide-width preheating treatment adopts the wide-width preheating technology of coal gangue: the coal gangue mined in the mining area is transported to the site, after preliminary crushing, it enters the rotary preheater, and the moisture content of the coal gangue is reduced. to below 0.8%.

[0112] Specifically, step A includes:

[0113] Step A1. The coal gangue raw material is subjected to primary crushing to obtain primary crushed particles with a particle size ranging from 20 mm to 50 mm; the particle size of the primary crushed particles in this embodiment is 30 mm.

[0114] Wherein, the primary crushing is carried out in the pulverizer 1...

Embodiment 3

[0150] A high-efficiency coupling, multi-generation, low-nitrogen coal gangue activation process of this embodiment, the steps include:

[0151] Step A. Carrying out extensive preheating treatment of coal gangue raw material to obtain:

[0152] - The first coal gangue with a moisture content lower than 0.8%;

[0153]Specifically, the wide-width preheating treatment adopts the wide-width preheating technology of coal gangue: the coal gangue mined in the mining area is transported to the site, after preliminary crushing, it enters the rotary preheater, and the moisture content of the coal gangue is reduced. to below 0.8%.

[0154] Specifically, step A includes:

[0155] Step A1. The coal gangue raw material is subjected to primary crushing to obtain primary crushed particles with a particle size ranging from 20 mm to 50 mm; the particle size of the primary crushed particles in this embodiment is 50 mm.

[0156] Wherein, the primary crushing is carried out in the pulverizer 1,...

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Abstract

A high-efficiency coupling, polygeneration and low-nitrogen coal gangue activation process includes the following process steps: A. a coal gangue raw material is subjected to wide preheating to obtainfirst coal gangue having a water content of less than 0.8%; B. the first coal gangue is subjected to field effect low nitrogen roasting to obtain a first activated powder product and a high temperature flue gas; C. the high temperature flue gas is subjected to residual heat coupling adjustment to obtain a second activated powder product, a low temperature flue gas recycled to the step A to participate in the wide preheating and low temperature air recycled to the step B to participate in the field effect low nitrogen roasting. The process adopts the combination of mechanical, high temperatureand chemical three activation modes, the activation effect almost reaches the limit, the activation is no longer a single roasting process, the thermal energy in the flue gas is fully utilized, and the coupling adjustment form is designed, the material itself is preheated for drying, combustion air is preheated, and external heat is supplied.

Description

【Technical field】 [0001] The invention relates to the technical field of comprehensive utilization of coal gangue, in particular to an energy-saving and environment-friendly coal gangue activation process combined with multiple methods. 【Background technique】 [0002] At present, coal gangue is the gangue between coal seams. Its composition is diverse. It is a mixed sedimentary rock that is mined together with coal. Because of its low calorific value, poor activity, and high processing and utilization costs, it has always been regarded as waste. Its emissions are huge, accounting for 10% to 15% of coal production. At present, the annual emissions are 150 million tons, which is already one of the largest industrial solid wastes in my country. Because it occupies a large amount of land and destroys the local environment, it has endangered the healthy development of the coal industry. The comprehensive utilization of coal gangue is an ideal idea for circular economy and ecologi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J19/00B01J6/00C01B32/50B01D53/00
CPCB01D53/00B01D2257/102B01D2257/302B01D2257/504B01D2258/0283B01J6/00B01J19/0006C01B32/50Y02P20/10Y02P20/129
Inventor 王玲刘胜许辉朱福英
Owner 辽宁盛达环保科技发展有限公司
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