Comprehensive utilization method and device for pulverized coal

A pulverized coal, first-class technology, applied in the field of pulverized coal comprehensive utilization methods and devices, can solve problems such as cracking, affecting tar yield, high asphaltene and dusty tar increasing processing difficulty, etc.

Pending Publication Date: 2019-03-01
上海博申工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Studies on the pyrolysis of coal (especially low-rank coal) have shown that usually pyrolysis at low temperature (450-600°C) can maximize the output of tar, and pyrolysis at high temperature (600-950°C) can maximize Pyrolysis gas (mainly including hydrogen and methane) is produced, and tar will be further cracked under high temperature conditions, affecting the yield of tar
It is precisely because of the difference in the reaction conditions for coal pyrolysis to produce tar and pyrolysis gas (mainly hydrogen and methane), therefore, the existing pulverized coal pyrolysis methods have not been able to ensure the production of tar and pyrolysis gas. Maximize the production of tar and pyrolysis gas at the same time under the premise of quality
[0005] In addition, the existing pulverized coal pyrolysis processing methods generally fail to solve the problems of online separation of oil and gas with dust and semi-coke cooling. At the same time, the tar produced by the existing coal processing methods generally contains coal tar pitch. Therefore, The high asphaltene and dusty tar produced by the existing coal processing method increases the difficulty of subsequent processing

Method used

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  • Comprehensive utilization method and device for pulverized coal
  • Comprehensive utilization method and device for pulverized coal
  • Comprehensive utilization method and device for pulverized coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0109] In this embodiment, the pulverized coal comprehensive utilization device of the present invention is used to process long-flame coal.

[0110] The main properties of the long-flame coal used are shown in Table 1.

[0111] Table 1 Main properties of long-flame coal (raw coal 1)

[0112]

[0113] Raw material pulverized coal particle size range: particle size <5mm, 0.1-1mm range is greater than 70%;

[0114] Experimental method of working condition 1:

[0115] Such as figure 1 As mentioned above, the primary pyrolysis semi-coke 8 after air stripping from the primary settler C-1 is mixed with the high-temperature heating semi-coke 29 lifted from the primary heater D-1 in the premixer A to obtain High temperature material 30.

[0116] Raw pulverized coal 1 and high-temperature material 30 quickly achieve sufficient back-mixing and mass transfer and heat transfer in the primary pyrolyzer B-1 to obtain primary pyrolysis reaction material 2 .

[0117] The primary pyrol...

Embodiment 2

[0170] This embodiment uses the pulverized coal comprehensive utilization device of the present invention to process lignite.

[0171] The main properties of the lignite used are shown in Table 4.

[0172] Table 4 lignite (feed) main properties

[0173]

[0174] Raw material pulverized coal particle size range: particle size <5mm, 0.1-1mm range is greater than 70%;

[0175] (1) adopt the experimental method of 1 of working condition in embodiment 1, main operation condition is as follows, other with reference to embodiment 1:

[0176] The operating conditions of the primary pyrolyzer B-1 are: the pressure is 0.2-0.4MPa(G), and the temperature is 480-550°C;

[0177] The operating conditions of the primary settler C-1 are: the pressure is 0.2~0.4MPa(G), the temperature is 480~540℃;

[0178] The operating conditions of premixer A are: pressure 0.2-0.4MPa(G), temperature 580-620°C;

[0179] The operating conditions of the secondary pyrolyzer B-2 are: pressure 0.2~0....

Embodiment 3

[0189] The present embodiment is to use the pulverized coal comprehensive utilization device of the present invention to process raw materials comprising lignite 90% by weight+heavy oil 10% by weight.

[0190] The main properties of the lignite used are shown in Table 6.

[0191] Table 6 lignite (feed) main properties

[0192]

[0193] Raw material pulverized coal particle size range: particle size <5mm, 0.1-1mm range is greater than 70%;

[0194] Table 7 The main properties of heavy oil (feed) blended

[0195] project

unit

value

Remark

density

20℃,kg / m 3

1050

carbon residue

%weight

22.5％

Sulfur content

% heavy scene

2.0％

heavy metal content

ppm

200

Colloid + asphaltenes

%weight

45％

Solid content

%weight

0.1％

[0196] (1) adopt the experimental method of 1 of working condition in embodiment 1, main operation condition is as fol...

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Abstract

The invention relates to a comprehensive utilization method and device for pulverized coal, in particular to a comprehensive utilization device for the pulverized coal. The device comprises a premixer(A), a primary pyrolyzer (B-1), a primary settling device, a secondary pyrolyzer (B-2), a secondary settling device, a primary heating device, a secondary heating device, a semi-coke heater (E), a washer (F) and a quencher (G); the connection method is described in detail in the specification; a comprehensive utilization method using the device for the pulverized coal is also disclosed. The comprehensive utilization method and device for the pulverized coal have the advantages that a series level separate pyrolysis method of producing oil at a low temperature condition and producing gas at ahigh temperature condition is adopted, thereby avoiding the mutual influence of producing more oil at the low temperature and producing more gas at the high temperature, achieving the maximum output of tar and pyrolysis gas, ensuring the quality of the tar, and obtaining low volatile powder coke; the high-efficiency utilization of coal in different grades and qualities is achieved, thereby achieving the graded utilization and recovery of energy, and improving the comprehensive utilization benefits of the coal.

Description

technical field [0001] The invention belongs to the field of coal processing and utilization, and in particular relates to a pulverized coal comprehensive utilization method and device. Background technique [0002] my country is one of the few countries in the world where coal is the main energy source, and coal accounts for more than 60% of my country's energy consumption structure. According to our country's resource situation and the status quo of the energy structure, the basic strategy of the future energy structure policy is "coal-based, diversified development", that is, to maintain the primary energy structure with coal as the main body and the comprehensive development of oil, gas and new energy; to optimize the secondary energy structure, especially improving coal utilization efficiency and cleanliness. With the rapid development of the coal chemical industry in recent years, the efficient and clean utilization of coal has become the country's guiding direction f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10G1/00
CPCC10B53/04C10G1/002
Inventor 王重平陈兆然马骏
Owner 上海博申工程技术有限公司
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