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Method for obtaining low-rank coal pyrolysis characteristic parameters and semi-coke combustion characteristic parameters

A technology of characteristic parameters and combustion characteristics, which is applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems that characteristic parameters cannot be effectively compared and analyzed, and the temperature control system requires high precision and poor accuracy. Achieve the effect of research specification, accurate parameters and simple process

Active Publication Date: 2019-04-02
QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for obtaining low-rank coal pyrolysis characteristic parameters and its semi-coke combustion characteristic parameters, aiming at solving the problem that the existing parameter acquisition method has a complicated process and the obtained characteristic parameters Effective comparative analysis cannot be carried out, and the acquisition of semi-coke combustion characteristic parameters requires high precision of the temperature control system, and the accuracy is poor

Method used

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  • Method for obtaining low-rank coal pyrolysis characteristic parameters and semi-coke combustion characteristic parameters
  • Method for obtaining low-rank coal pyrolysis characteristic parameters and semi-coke combustion characteristic parameters
  • Method for obtaining low-rank coal pyrolysis characteristic parameters and semi-coke combustion characteristic parameters

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Experimental program
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Effect test

Embodiment 1

[0045] 1) Grind and sieve the Shenmu lignite raw coal to 160-200 mesh to obtain coal powder;

[0046] 2) Weigh 25 mg of the coal powder obtained in step 1) into a thermobalance crucible, and under the protection of an Ar atmosphere with a flow rate of 100 ml / min, perform atmosphere replacement in the thermobalance at room temperature;

[0047] 3) Continue to heat the sample to 600°C at a heating rate of 10°C / min under the protection of an Ar atmosphere with a flow rate of 100 ml / min to obtain coal semi-coke, and the thermobalance system automatically records the coal during the pyrolysis process. powder weight change data, and obtain the weight time change curve and temperature time change curve of the coal powder;

[0048] 4) Insulate at 600°C for 10 minutes;

[0049] 5) Switch the Ar atmosphere to air atmosphere, carry out semi-coke combustion at 600°C in a heat preservation state, and the thermobalance system automatically records the weight change data of the coal semi-co...

Embodiment 2

[0052] 1) Grind and sieve Shenmu bituminous coal to 160-200 mesh to obtain coal powder;

[0053] 2) Weigh 25 mg of the coal powder obtained in step 1) into a thermobalance crucible, and under the protection of an Ar atmosphere with a flow rate of 100 ml / min, perform atmosphere replacement in the thermobalance at room temperature;

[0054] 3) Continue to heat the sample to 600°C at a heating rate of 10°C / min under the protection of an Ar atmosphere with a flow rate of 100 ml / min to obtain coal semi-coke, and the thermobalance system automatically records the coal during the pyrolysis process. powder weight change data, and obtain the weight time change curve and temperature time change curve of the coal powder;

[0055] 4) Insulate at 600°C for 10 minutes;

[0056] 5) Switch the Ar atmosphere to air atmosphere, carry out semi-coke combustion at 600°C in a heat preservation state, and the thermobalance system automatically records the weight change data of the coal semi-coke, a...

Embodiment 3

[0059] 1) Grind and sieve the Shenmu lignite raw coal to 160-200 mesh to obtain coal powder;

[0060] 2) Weigh 25 mg of the coal powder obtained in step 1) into a thermobalance crucible, and under the protection of an Ar atmosphere with a flow rate of 100 ml / min, perform atmosphere replacement in the thermobalance at room temperature;

[0061] 3) Continue to heat the sample to 600°C at a heating rate of 10°C / min under the protection of an Ar atmosphere with a flow rate of 100 ml / min to obtain coal semi-coke, and the thermobalance system automatically records the coal during the pyrolysis process. powder weight change data, and obtain the weight time change curve and temperature time change curve of the coal powder;

[0062] 4) Insulate at 600°C for 10 minutes;

[0063] 5) Switch the Ar atmosphere to include 21% O 2 + 79% CO 2 Combustion of semi-coke in a mixed atmosphere at 600°C, the thermobalance system automatically records the weight change data of the coal semi-coke, ...

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Abstract

The invention discloses a low-rank coal pyrolysis characteristic parameter and semicoke combustion characteristic parameter obtaining method comprising the following steps: A, grinding and screening the low-rank coal so as to obtain coal powders; B, adding the coal powders into a thermobalance crucible, and replacing the atmosphere in the thermobalance into inert atmosphere under room temperature; C, under the inert atmosphere protection, heating the coal powders up to a preset temperature in a preset heating rate, carrying out pyrolyzation so as to obtain coal semicoke, and obtaining a coal powder weight time change curve and a temperature time change curve; D, regulating the temperature in the thermobalance to the semicoke combustion temperature, and insulating for certain time; E, switching inert atmosphere into semicoke combustion atmosphere, carrying out semicoke combustion under insulation state, thus obtaining coal semicoke weight time change curve and a temperature time change curve. The parameter obtaining method is simple in process, can eliminate influences on semicoke preparation by different pyrolysis devices, can use a static method to study low-rank coal semicoke combustion features, thus obtaining more accurate parameters.

Description

technical field [0001] The invention relates to the application field of low-rank coal, in particular to a method for obtaining low-rank coal pyrolysis characteristic parameters and semi-coke combustion characteristic parameters. Background technique [0002] my country is the world's largest coal producer and consumer, and coal has long accounted for more than 65% of primary energy consumption. Low-rank coal with a low degree of coalification accounts for more than half of my country's proven coal reserves. In order to ensure the sustainable development of the national economy, improve the utilization rate of coal, and reduce the pollution of coal to the atmosphere, develop clean and efficient utilization technologies for low-rank coal imminent. Low-rank coal has the characteristics of high water content, high volatile matter content, and low calorific value. When it is directly used, it has low efficiency and serious pollution. If it is to be used reasonably, it must be pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 王志奇沈国栋武景丽何涛杨静
Owner QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI
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