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Heat accumulation and energy storage graphite material for solar thermal power generation and preparation method thereof

A heat storage material, graphite technology, applied in the direction of heat exchange materials, chemical instruments and methods, etc., can solve the problems of low working temperature, undurable cost, poor heat storage capacity, etc., and achieve small elastic modulus and long service life , Enhance the effect of heat storage capacity

Active Publication Date: 2011-08-31
DATONG XINCHENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a graphite heat storage material for solar thermal power generation, so as to make up for the problems of low working temperature, poor heat storage capacity, non-durability and high cost of thermal energy storage materials in the prior art

Method used

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  • Heat accumulation and energy storage graphite material for solar thermal power generation and preparation method thereof
  • Heat accumulation and energy storage graphite material for solar thermal power generation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The calcined petroleum coke and needle coke are mixed according to the mass ratio (9:1), and the mixture is crushed and sieved to make three grades of pellets: 0.8-0.335mm, 0.335-0.075mm and less than 0.075mm , respectively placed in three material bins; among them: the mass percentage content of the mixture of 0.335<particle size≤0.8mm is 22%, the mass percentage content of the mixture of 0.075mm<particle size≤0.335mm is 35%, and the particle size≤0.075mm The mass percent of the mixture is 43%.

[0054] Put the above mixture into the kneading pot for dry mixing, the temperature of the kneading pot is 165°C, stir at 39.6 rpm for 30 minutes, and the temperature of the dry material is 135°C.

[0055] After the dry mixing is completed, add modified asphalt into the kneading pot, the mass percentage of dry material and modified asphalt is 75:25, wherein the modified asphalt is added in two times, and the first addition is 60% of the total modified asphalt. %, kneading with...

Embodiment 2

[0062] Proportion calcined petroleum coke and needle coke according to the mass percentage (17:3), and the mixture is crushed and sieved to make three grades of pellets: 0.8-0.335mm, 0.335-0.075mm and less than 0.075mm , respectively placed in three material bins; among them: the mass percentage content of the mixture of 0.335<particle size≤0.8mm is 18%, the mass percentage content of the mixture of 0.075mm<particle size≤0.335mm is 36%, and the particle size≤0.075mm The mass percentage of the mixture is 46%.

[0063] Put the above-mentioned mixture into the kneading pot for dry mixing, the temperature of the kneading pot is 170°C, stir at 39.6 rpm for 40 minutes, and the temperature of the dry material is 135°C.

[0064] After the dry mixing is completed, add modified asphalt into the kneading pot, the mass percentage of dry material and modified asphalt is 80:20, wherein the modified asphalt is added in two times, and the first addition is 55% of the total modified asphalt. ...

Embodiment 3

[0071] The calcined petroleum coke and needle coke are mixed according to the mass ratio (88:12), and the mixture is crushed and sieved to make three grades of pellets: 0.8-0.335mm, 0.335-0.075mm and 0.075-0mm , respectively placed in three material bins; among them: the mass percentage content of the mixture of 0.335<particle size≤0.8mm is 22%, the mass percentage content of the mixture of 0.075mm<particle size≤0.335mm is 32%, and the particle size≤0.075mm The mass percentage of the mixture is 46%.

[0072] Put the above mixture into the kneading pot for dry mixing, the temperature of the kneading pot is 175°C, stir at 39.6 rpm for 40 minutes, and the temperature of the dry material is controlled between 125°C.

[0073] After the dry mixing is completed, add modified asphalt into the kneading pot, the mass ratio of dry material and modified asphalt is 8:1, wherein the modified asphalt is added in two times, and the first addition is 45% of the total modified asphalt. %, knea...

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Abstract

The invention relates to a heat accumulation and energy storage graphite material for solar thermal power generation and a preparation method thereof. The performance parameters of the graphite material meet the following requirements that: volume density is more than or equal to 1.75 g / cm<3>; electrical resistivity is less than or equal to 7.5 mu ohm m; ash content is less than or equal to 0.2 percent; rupture strength is more than or equal to 18.5 MPa; elastic modulus is less than or equal to 8.8 Gpa; and thermal expansion coefficient is less than or equal to 2.0*10<-6> / DEG C<-1>. The graphite material of the invention has the advantages of high thermal capacity, high heat conductivity, long service life, low cost and the like. In the preparation method, the focusing solar thermal power generation and heat accumulating material is prepared from raw materials by the steps of sieving, burdening, kneading, airing, vibration molding, baking, soaking, secondary baking, graphitizing and machining.

Description

technical field [0001] The invention relates to a graphite material and a manufacturing method thereof, in particular to a graphite heat storage material for solar thermal power generation and a manufacturing method thereof. Background technique [0002] Concentrated solar thermal power generation system (CSP), which uses a heat collector to convert solar radiation into high-temperature heat energy, and generates electricity through a thermodynamic cycle process. As a new energy and renewable energy development technology with huge development potential, many developed countries have invested a lot of money and manpower in development and research, and established CPS demonstration projects. At present, this technology has entered the initial stage of industrial application. In CSP system, heat storage technology is a key technology. [0003] The heat storage materials in solar thermal power generation include sensible heat storage materials, phase change heat storage mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/14
Inventor 范志利陈少鲲张培模庞中海张日清杨晓峰叶宛丽阮明礼
Owner DATONG XINCHENG NEW MATERIAL CO LTD
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