Continuous curing method and system for programmed carbon dioxide curing building material products

Abstract

The invention discloses a continuous curing method and system for programmed carbon dioxide curing of building material products, the continuous curing method comprises the steps that M groups of curing kettles are arranged in total, and the CO2 curing process of each group of curing kettles comprises a building material product moving-in stage, a pressure increasing stage, a pressure reducing stage, a tail end gas recycling stage and a building material product moving-out stage which are carried out in sequence; the boosting stage comprises a recycled gas boosting stage and a raw material gas boosting stage which are carried out in sequence, the number of boosting stages is n, and n is larger than or equal to 1 and smaller than or equal to 8; the number of times of the step-down stage is the same as that of the step-up stage; the recycled gas in the xth recycled gas boosting stage comes from recycled gas discharged by other groups of curing kettles in the xth depressurization stage; wherein x is smaller than or equal to n, n and x are positive integers, and M is a positive integer larger than or equal to 2; the frequency of the boosting stage is increased, and the effective utilization rate of the curing kettle is improved.

Description

technical field [0001] The invention relates to the technical field of maintenance of building materials, in particular to a continuous maintenance method and system for programmed carbon dioxide curing of building materials. Background technique [0002] with CO 2 Mineralization curing building materials product technology can realize CO 2 The high-efficiency utilization of the building materials conforms to the national policy requirements of carbon reduction, and at the same time realizes the recycling of industrial alkali metal solid waste. [0003] In the maintenance process of the actual industrial equipment, in order to increase the CO 2 The utilization efficiency of mineralization requires the raw gas to have a certain pressure. According to the material characteristics of different building materials, the curing pressure of porous blocks is generally 0.8-1.5MPaG, while the curing pressure of solid blocks is 1.5-2.5MpaG. The process is a slow pressurization proces...

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Problems solved by technology

[0003] In the maintenance process of the actual industrialized device, in order to improve the CO 2 The utilization efficiency of mineralization requires a certain pressure of raw material gas. According to the material characteristics of different building materials, the curing pressure of porous blocks is generally 0.8-1.5MPaG, while the curing pressure of solid blocks is 1.5-2.5MpaG. The process is a slow boosting process. After the curing, the curing kettle is maintained at a high curing pressure. This part of the high-pressure gas is rich in CO 2 , if it is discharged directly, it will cause CO 2 Decreased utilization efficiency and CO 2 waste of gas

[0004] In the prior art, there are cases where this part of high-pressure gas is returned to the curing kettle for reuse, but the utilization effect is not good

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