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Concrete heat storage material for solar moderate-temperature steam electric power generation and preparation method thereof

A heat storage material and concrete technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., to achieve low price, improve compactness and crack resistance, and reduce mixing water consumption

Inactive Publication Date: 2015-06-03
中广核太阳能开发有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to provide a concrete heat storage material for solar medium-temperature steam power generation and its preparation method, thereby solving the aforementioned problems in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] Formula: dolomite aggregate: particle size 10-30mm, 38 parts by weight

[0078] Bauxite aggregate: particle size 1-10mm, 32 parts by weight

[0079] Aluminate cement: particle size 500 mesh, 8 parts by weight

[0080] Slag powder: particle size 500 mesh, 15 parts by weight

[0081] Silica powder: particle size 500 mesh, 5 parts by weight

[0082] Carbon nanotubes: tube diameter 10-50nm, 2 parts by weight

[0083] Add 0.3 parts by weight of high-efficiency water reducer.

[0084] Preparation:

[0085] Take the formula amount of dolomite aggregate, bauxite aggregate, aluminate cement, slag powder, silicon micropowder and carbon nanotubes, and then mix the formula amount of high-efficiency water reducer, after dry mixing evenly, add 6 parts by weight of Water, mix evenly and place in a steel mold (or other type of mold), remove the mold after 24 hours, cure in water at a temperature of 20-25°C for 72 hours, and bake at a temperature...

Embodiment 2

[0088] Formula: dolomite aggregate: particle size 10-30mm, 35 parts by weight

[0089] Bauxite aggregate: particle size 1-10mm, 35 parts by weight

[0090] Aluminate cement: particle size 500 mesh, 6 parts by weight

[0091] Slag powder: particle size 500 mesh, 17 parts by weight

[0092] Silica powder: particle size 500 mesh, 4 parts by weight

[0093] Carbon nanotubes: tube diameter 100-500nm, 3 parts by weight

[0094] Add 0.3 parts by weight of high-efficiency water reducer.

[0095] Preparation:

[0096] Take the formula amount of dolomite aggregate, bauxite aggregate, aluminate cement, slag powder, silicon micropowder and carbon nanotubes, and then mix the formula amount of high-efficiency water reducer, after dry mixing evenly, add 5.5 parts by weight of Water, mix evenly and place in a steel mold (or other type of mold), remove the mold after 24 hours, cure in water at a temperature of 20-25°C for 72 hours, and bake at a tempera...

Embodiment 3

[0099] Formula: dolomite aggregate: particle size 10-30mm, 32 parts by weight

[0100] Bauxite aggregate: particle size 1-10mm, 38 parts by weight

[0101] Aluminate cement: particle size 500 mesh, 9 parts by weight

[0102] Slag powder: particle size 500 mesh, 14 parts by weight

[0103] Silica powder: particle size 500 mesh, 3 parts by weight

[0104] Carbon nanotubes: tube diameter 100-500nm, 4 parts by weight

[0105] Add 0.3 parts by weight of high-efficiency water reducer.

[0106] Preparation:

[0107] Take the formula amount of dolomite aggregate, bauxite aggregate, aluminate cement, slag powder, silicon micropowder and carbon nanotubes, and then mix the formula amount of high-efficiency water reducer, after dry mixing evenly, add 6.5 parts by weight of Water, mix evenly and place in a steel mold (or other type of mold), remove the mold after 24 hours, cure in water at a temperature of 20-25°C for 72 hours, and bake at a tempera...

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Abstract

The invention provides a concrete heat storage material for solar moderate-temperature steam electric power generation and a preparation method thereof. The composition of the heat storage material is subjected to optimization design, thereby greatly enhancing the comprehensive properties of the heat storage material. By using dolomite with low price and excellent thermal properties as aggregate and adopting a micropowder technique, the enhancement effect of the nano material is utilized, and a high efficiency water reducing agent and low-doping-amount aluminate cement are used as binding agents, thereby greatly lowering the cement consumption (lowering the productive energy consumption of the raw materials) and the mixing water quantity of the heat storage material, and greatly enhancing the heat stability and service life of the heat storage material at working temperature (350-600 DEG C). Carbon nanotubes are doped and filled in the concrete pores to enhance the compactness and strength of the concrete. A novel high efficiency composite water reducing agent can be adopted to lower the mixing water quantity, thereby improving the workability of the concrete and enhancing the compactness and strength.

Description

technical field [0001] The invention relates to the technical field of preparation of new heat storage materials for solar power generation, and in particular to a preparation method that uses dolomite and bauxite as aggregates, adds silicon micropowder, aluminum micropowder, slag powder, aluminate cement and other micropowders, and carbon nanotubes. Heat storage materials and preparation methods thereof. Background technique [0002] At present, the heat storage materials used in solar steam power generation mainly include molten salt (KNO3, NaNO3 or a mixture of the two) and iron ore. However, molten salt has a very obvious defect, which is its strong corrosiveness, which has a very strong corrosive effect on heat exchange pipes and other auxiliary facilities, thus increasing the operating cost of the power plant and reducing the safety and stability of the system. Iron ore is in a loose accumulation state, which is not conducive to the process of heat storage and heat re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B14/26C04B18/12
CPCY02W30/91
Inventor 谢昭荆汝林朱教群周卫斌邱河梅
Owner 中广核太阳能开发有限公司
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