Lignitic coal modifying processing system and technology

A processing system and processing technology, which is applied in the field of lignite processing, can solve the problems of insufficiency of oxygen isolation, high lignite moisture, and high ash content, and achieve the effect of increasing value, high volatile content, and low ash content

Inactive Publication Date: 2011-09-07
QIANQIU ENERGY SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The existing lignite upgrading treatment system and process generally use hot air to upgrade lignite in an unclosed environment, which cannot isolate oxygen, and the lignite drying process will be affected by the outside world, and only unbound lignite water can be removed. The obtained lignite still has higher moisture content, higher ash content and lower calorific value

Method used

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  • Lignitic coal modifying processing system and technology
  • Lignitic coal modifying processing system and technology
  • Lignitic coal modifying processing system and technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Lignite to be processed: total water 28.4%, ash content 20.04%, volatile matter 29.06%, low calorific value 3224 kcal / kg.

[0078] The lignite to be treated is crushed and ground to an average particle size of about 0.15mm, and then sent to a double-blade dryer, and the lignite is heated and dried by the heat transfer oil in the double-blade dryer, and the lignite is heated and dried at a temperature of 300°C. , Stirring treatment for 2 hours under the condition of pressure of 1.1Mpa, during the treatment process, the water vapor and escaping substances produced are discharged to the outside, and the external substances cannot enter the treatment system. After the treatment is completed, the lignite product is obtained.

[0079] Effect verification:

[0080] The lignite that the present embodiment is processed is sent to Guangdong Provincial Quality Supervision Coal Inspection Station (Guangzhou) for inspection, and the inspection results are as follows:

[0081] Inspe...

Embodiment 2

[0088] Lignite to be processed: total water 28.4%, ash content 20.04%, volatile matter 29.06%, low calorific value 3224 kcal / kg.

[0089] The lignite to be treated is crushed and ground to an average particle size of about 0.12mm, and then sent to a double-blade dryer, and the lignite is heated and dried by the heat-conducting oil in the double-blade dryer, and the lignite is heated and dried at a temperature of 400°C. 1. Under the condition of pressure of 0.9Mpa, the shearing treatment was carried out for 3 hours, and the water vapor and escaping substances produced during the treatment process were discharged to the outside, and the external substances could not enter the treatment system. After the treatment was completed, the lignite product was obtained. The lignite that the present embodiment is processed is delivered to the Guangdong Provincial Quality Supervision Coal Inspection Station (Guangzhou) for inspection, and the inspection basis is the same as embodiment one, ...

Embodiment 3

[0094] Lignite to be processed: total water 28.4%, ash content 20.04%, volatile matter 29.06%, low calorific value 3224 large / kg.

[0095] The lignite to be treated is crushed to an average particle size of about 2mm, and then sent to a double-blade dryer, and the heat-conducting oil in the double-blade dryer is used to heat and dry the lignite. Grinding treatment under the condition of 1.5Mpa for 5 hours, during the treatment process, the water vapor and escaping substances produced will be discharged to the outside world, and the outside substances will not enter the treatment system. The lignite product will be added with additives and then pressed into shape. The lignite that the present embodiment is processed is sent to Guangdong Provincial Quality Supervision Coal Inspection Station (Guangzhou) for inspection, and inspection basis is identical with that in embodiment one, and inspection result is as follows table 4:

[0096] Table 4

[0097] Test items

[009...

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Abstract

The invention discloses a lignitic coal modifying processing system which comprises a raw material delivery device, a drying device and a heat conducting oil furnace, wherein the drying device is respectively connected with the raw material delivery device and the heat conducting oil furnace; the raw material delivery device delivers the lignitic coal raw material to the drying device; the heat conducting oil furnace delivers the heat conducting oil to the drying device; and the lignitic coal is modified by the drying devices through the heat conduction of the heat conducting oil under the environment of isolating external materials. According to the lignitic coal modifying processing system provided by the invention, because the lignitic coal is subjected to heat conduction by utilizing the high-temperature heat conducting oil, simultaneously the lignitic coal is dried by isolating the influence of the external materials, not only can the heat value of the lignitic coal be improved, but also the volatile can be improved, and the moisture of the lignitic coal is reduced, thus the lignitic coal is dried fully, the moisture of the obtained lignitic coal product is obviously reduced, the heating productivity is improved greatly, the self-combustion of the coal can be prevented and the coal is convenient to transport and store, the system is good for the use of power generation, gas making, chemical engineering, and the like.

Description

technical field [0001] The invention relates to the technical field of lignite treatment, in particular to a lignite upgrading treatment system and process for performing upgrading and deashing treatment on lignite. Background technique [0002] Lignite, also known as firewood coal, is the coal with the lowest degree of coalification, accounting for about 40% of global coal reserves and 13% of China's coal reserves. Low calorific value, easy weathering and spontaneous combustion, high transportation cost per unit energy, not conducive to long-distance transportation and storage. The thermal efficiency of direct combustion of lignite is low, and the emission of greenhouse gases is also large, making it difficult to develop and utilize on a large scale. In addition, the conversion and utilization of lignite as a raw material is also limited. Lignite liquefaction, dry distillation and gasification all need to reduce the moisture in coal to below 10%. If lignite is not upgrade...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B23/10F26B25/00C10L9/00
Inventor 李柏荣
Owner QIANQIU ENERGY SHANGHAI
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