Lignite transient dehydration upgrading and temperature and pressure instant generating device system

A generation system, lignite technology, applied in the direction of drying gas arrangement, drying solid materials, dryers, etc., can solve the problems of poor dehydration effect, easy spontaneous combustion, easy reabsorption, etc., to achieve large processing capacity, reduce reabsorption, and flow simple effect

Active Publication Date: 2021-07-09
CHINA UNIV OF MINING & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art, the present invention provides a lignite transient dehydration upgrading and temperature-pressure instantaneous device system, which overcomes the poor dehydration effect, easy spontaneous combustion, and problem of relapse and, due to its structural properties, it is well suited for large-scale industrial applications

Method used

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  • Lignite transient dehydration upgrading and temperature and pressure instant generating device system

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Effect test

Embodiment 1

[0019] A lignite transient dehydration upgrading and temperature-pressure instantaneous device system is composed of a steam generation system 2 , a steam dehydration system, a steam recovery system 12 and a tail gas purification device 18 . The material is fed through the feeding device above the steam dehydration system, and the material enters the feeding area 4. At this time, the sealing valves 3 and 17 are opened, and the internal material platform is rotated forward. The wet material enters the dehydration area 8, and the material enters and then seals the valve 3, 17 off. Saturated steam is added in from the steam generation system 2 through the inlet valve 7, adjusted to a high temperature and high pressure state, and the pressure is maintained for a certain period of time. During this stage, the saturated water vapor takes away the moisture inside the material through gas-liquid exchange, and the pressure relief valve 15 Instantaneous pressure release to normal temper...

Embodiment 2

[0021] The lignite contains water before dehydration, and the material is fed through the feeding device 13 above the steam dehydration system, and the material enters the feeding area 4. At this time, the sealing valves 5 and 10 are opened, and the internal material platform is rotated forward, and the lignite enters the dehydration area 8. After dehydration The lignite enters and then the sealing valves 5, 10 are closed. Saturated steam is added from the steam generation system, and then adjusted to 2 MPa by the pressure sensing devices 6 and 9 of the electronic control system 1 to stabilize the pressure. In this stage, the saturated water vapor takes away the internal moisture of the lignite through gas-liquid exchange, and then the electric control system The pressure relief valve 14 is controlled to release the pressure instantaneously to normal temperature and pressure, and the internal steam will explode to destroy the lignite pores, and then be introduced into the steam...

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Abstract

The invention belongs to the technical field of mineral processing, and particularly relates to a lignite transient dehydration upgrading and temperature and pressure instant generating device system. The device is composed of a steam generation system, an electric control system, a steam dehydration system, a steam recovery system and a tail gas purification device. Materials are added through a feeding device above the steam dehydration system and enter a feeding area, at the moment, a sealing valve is opened, an internal material platform is pushed forwards in a rotary mode, wet materials enter the dehydration area, dry materials enter and then the sealing valve is closed. Saturated steam is added into the steam generation system and then adjusted to be at a high-temperature and high-pressure state by the electric control system, and the pressure is continuously stabilized for a certain period of time. And then the sealing valve is opened, the dry materials enter the discharging area and then are discharged by a conveying belt, and new wet materials enter the dehydration area to begin the next round of dehydration. The device solves the problems that a traditional lignite and high-water-content low-quality coal dehydration device is poor in effect and prone to spontaneous combustion and relapse, continuous operation can be achieved, the treatment capacity is large, the process is simple, and the device can be suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a lignite transient dehydration and upgrading and temperature-pressure instantaneous device system, which is suitable for dehydration and upgrading of lignite and high-water-content low-quality coal. Background technique [0002] The high moisture content of lignite is a major factor restricting its deep processing and subsequent utilization. The high water content of lignite will increase the transportation cost of lignite; when lignite is directly used for combustion to generate electricity, the evaporation of its internal water needs to consume a large amount of latent heat of gasification, which reduces the efficiency of power plants and causes relatively high carbon dioxide emissions. At present, the traditional dehydration methods of lignite and low-quality coal with high water content in my country have the disadvantages of poor dehydration effect, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B17/20F26B21/00F26B21/04F26B25/00F26B25/04
CPCF26B17/20F26B21/005F26B21/04F26B25/002F26B25/04F26B25/005B01J19/20B01J19/0013C10L5/04C10L2290/08C10L2290/547
Inventor 张博赵鹏飞巩林盛张真兴刘晋芳杨凡
Owner CHINA UNIV OF MINING & TECH
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