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A solar greenhouse wall containing coal gasification slag and preparation method thereof

A technology of coal gasification slag and solar greenhouse, which is applied in the direction of wall, solid waste management, climate sustainability, etc., can solve the problems of air and water pollution, waste of cultivated land resources, unutilized coal, etc., and achieve the effect of meeting the needs of the project

Active Publication Date: 2019-01-01
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The continuous development of coal gasification technology has greatly increased the conversion ratio of coal, but the average conversion ratio of carbon in various bed types is still below 85%. The output is quite amazing
Based on the 110 million tons of gasification coal used in 2010, it is preliminarily estimated that the annual output of coal gasification slag in my country will reach about 30Mt. In addition, there are almost no domestic methods for utilizing large amounts of coal gasification slag, resulting in a large accumulation of coal gasification slag, which wastes my country's current Very tight arable land resources are likely to cause serious air and water pollution. It is imminent to find feasible commercial products that can utilize coal gasification slag in large quantities

Method used

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  • A solar greenhouse wall containing coal gasification slag and preparation method thereof
  • A solar greenhouse wall containing coal gasification slag and preparation method thereof
  • A solar greenhouse wall containing coal gasification slag and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The preparation test of wall building materials containing coal gasification slag uses cement, carbide slag, and coal gasification slag as building materials, among which carbide slag and cement are the main cementitious materials, and coal gasification slag is used as aggregate. SiO in coal gasification slag 2 、Al 2 o 3,Hydration to generate calcium silicate hydrate and calcium aluminate hydrate gel to improve the strength and compactness of the free material. According to the experimental design idea of ​​concrete mix ratio, select the water consumption per unit volume m w , water-binder ratio (m w / m c +m cs ), and the ratio of cement to carbide slag (m c / m cs ) are the three influencing factors A, B, and C of this experiment, combined with the volume method used in the concrete proportioning test, the four components of water, cement, carbide slag, and coal gasification slag in each group of experiments can be obtained. quality.

[0039] In this example, c...

Embodiment 2

[0053] Embodiment 2 additive test

[0054] Under the conditions of strong alkalinity and rich calcium ions, sulfate ions can interact with active Al in slag 2 o 3 The reaction takes place, and the reaction equation is as follows:

[0055] AlO 2 - +Ca 2+ +OH - +SO 4 2- →CaO·Al 2 o 3 · 3CaSO 4 32H 2 O In this example, gypsum powder and potassium sulfate were selected as the sulfate activator of this test, and the influence of these two sulfates on the performance of unburned bricks was explored without adding cement.

[0056] Table 5 Comparative experiment of sulfate and onset effect

[0057]

[0058] From the comparison test and it has been clearly found that without adding cement, the stimulation effect of sulfate is very obvious, and the 14d compressive strength of gypsum and potassium sulfate is increased by 100.03% and 67.01% respectively, because gypsum itself is gelled material, so its effect on improving the strength of unburned bricks is better than that...

Embodiment 3

[0059] Example 3 Construction of solar greenhouse wall

[0060] Apply the building material of embodiment 1 and embodiment 2, build the method for solar greenhouse gable wall body, comprise steps:

[0061] 1) The elevation of the indoor floor 8 of the greenhouse is ±0.00, and the elevation of the outdoor floor 9 is at least -0.3m; that is, the indoor floor is at least 0.3m higher than the outdoor floor. This prevents outdoor water from entering the interior when it rains (see Figure 5 ).

[0062] 2) Along the vertical direction of the wall, adopt the method of layered construction. For the part of the wall below the outdoor floor, the ratio is: 14.61% water, 12.03% composite Portland cement, 17.19% carbide slag, 56.17% coal gasification slag, pour it into the mixing bin of the mixer, stir evenly, and prepare Wall building material; after being compacted with a flat vibrator, its compressive strength can reach 5MPa. For the part of the wall above the outdoor floor, the rat...

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Abstract

The invention provides a solar greenhouse wall containing coal gasification furnace slag. The wall part under the outdoor terrace is prepared from components as follows: 14-15 parts of water, 12-13 parts of complex Portland cement, 17-18 parts of carbide slag and 54-58 parts of the coal gasification furnace slag; the wall part above the outdoor terrace is prepared from components as follows: 13-14 parts of water, 10-12 parts of complex Portland cement, 15-17 parts of carbide slag, 50-53 parts of the coal gasification furnace slag and 0-8 parts of an additive. The invention further provides a preparation method of the solar greenhouse wall. The coal gasification furnace slag and the carbide slag are taken as main raw materials for building materials, a solar greenhouse is built on the basis of local geographic conditions, solid wastes are utilized locally, the structure of the greenhouse wall is suitable for the continental climate of plateaus and mountains, and the solar greenhouse wall is an excellent way to solve the problems about the environment and agriculture.

Description

technical field [0001] The invention belongs to the field of inorganic materials, in particular to a wall based on coal gasification slag and carbide slag and its preparation. Background technique [0002] The continuous development of coal gasification technology has greatly increased the conversion ratio of coal, but the average conversion ratio of carbon in various bed types is still below 85%. The yield is pretty amazing. Based on the 110 million tons of gasification coal used in 2010, it is preliminarily estimated that the annual output of coal gasification slag in my country will reach about 30Mt. In addition, there are almost no domestic methods for utilizing large amounts of coal gasification slag, resulting in a large accumulation of coal gasification slag, which wastes my country's current Very tight arable land resources are likely to cause serious air and water pollution. It is imminent to find feasible commercial products that can utilize coal gasification slag ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B2/00
CPCC04B18/04C04B18/065C04B28/04C04B2201/20C04B22/002C04B22/143Y02W30/91
Inventor 彭红涛张帅余真宝李靖赵祺朱耀东由明昊张嘉辉
Owner CHINA AGRI UNIV