Search

CN-121973335-A - CO in a concrete mixing system2In-situ mineralization and blockchain tracing system and method

CN121973335ACN 121973335 ACN121973335 ACN 121973335ACN-121973335-A

Abstract

The invention discloses a CO 2 in-situ mineralization and blockchain traceability system and method in a concrete mixing system, and belongs to the technical field of low-carbon building materials and digital authentication. Aiming at the pain points of low mineralization efficiency, incompatibility with a continuous production system, lack of credible tracing means of carbon data and the like existing in the existing CO 2 curing technology, the invention innovatively moves the CO 2 mineralization reaction from the traditional curing stage to the concrete stirring stage, and realizes the efficient dispersion and rapid mineralization of CO 2 by means of a dynamic stirring flow field. The system integrates four core modules of CO 2 in-situ injection, process cooperative control, carbon metering and blockchain tracing, and comprises the steps of cooperatively injecting quantitative CO 2 in the stirring process, measuring carbon sealing quantity in real time, uploading key data to a blockchain storage certificate, and generating a non-tamperable digital carbon certificate. The invention obviously improves the CO 2 mineralization efficiency, realizes the low-cost deep fusion with the existing production line, gives the concrete carbon emission reduction capacity verifiable and tradable asset attributes through the blockchain technology, and creates a complete solution from negative carbon manufacturing to value redemption for the industry.

Inventors

  • YIN RUILONG
  • GUO ZIZHENG
  • GUO ZIJING
  • LI KE
  • QIN BAORONG
  • LI JIA
  • Shi Jiaoyun

Assignees

  • 中路西建利废(陕西)技术研究有限公司

Dates

Publication Date
20260505
Application Date
20260316

Claims (9)

  1. 1. CO 2 in-situ mineralization and blockchain traceability system in a concrete mixing system is characterized by comprising: The CO 2 in-situ mineralization injection module is used for quantitatively introducing CO 2 into the mixture in the concrete stirring process; The carbon metering and data acquisition module is used for metering the amount of CO 2 introduced by the CO 2 in-situ mineralization injection module and calculating the net CO 2 storage amount of the batch of concrete based on the amount; And the blockchain carbon footprint tracing module is used for uploading batch production data comprising the CO 2 net sealing quantity to a blockchain network for certification and generating a tamper-proof carbon footprint digital certificate.
  2. 2. The system of claim 1, wherein the CO 2 in-situ mineralization injection module is integrally connected with the concrete mixing host and comprises a CO 2 supply unit and an injection terminal, wherein the injection terminal is arranged in the mixing host or in a feed port area and is used for injecting gaseous CO 2 or a solution dissolved with CO 2 into a mixture in the mixing host.
  3. 3. The system of claim 2, wherein the CO 2 in-situ mineralization injection module further comprises a metering control unit for precisely controlling the CO 2 feed flow.
  4. 4. The system of claim 1, further comprising a process cooperative control unit in communication with the CO 2 in-situ mineralization injection module and the control system of the concrete mixing host for cooperatively controlling the start timing of CO 2 injection, the injection parameters, and the mixing parameters of the mixing host according to a preset mixing process program.
  5. 5. The system of claim 4, wherein the predetermined stirring process is a step-feed stirring process, and the process cooperative control unit is configured to trigger the CO 2 in-situ mineralization injection module to start after the cement is initially hydrated in the step-feed stirring process and the fluidity of the mixture slurry satisfies a predetermined condition.
  6. 6. The system of any one of claims 1 to 5, wherein a carbon sequestration metering model is built into or connected to the carbon metering and data acquisition module, wherein the model calculates the CO 2 net sequestration amount using the amount of CO 2 consumed and the cementitious composition of the batch of concrete as inputs.
  7. 7. A CO 2 in situ mineralization and blockchain tracing method using the system of any one of claims 1 to 6, comprising the steps of: s1, introducing CO 2 into the mixture in a quantitative manner in the process of stirring concrete, so that in-situ mineralization reaction occurs; s2, measuring the amount of CO 2 consumed by the batch, and calculating the net CO 2 storage amount of the concrete of the batch; s3, uploading batch production data containing the CO 2 net sealing quantity to a blockchain network for certification, and obtaining a carbon footprint tracing certificate; s4, associating the carbon footprint tracing certificate with the product information of the batch of concrete.
  8. 8. The method of claim 7, wherein the step of introducing CO 2 into the mixture in a fixed amount is performed by injecting CO 2 into the mixing master when the mixture slurry reaches a predetermined fluidity after the cement is initially hydrated in a step-wise feed mixing process.
  9. 9. The method of claim 7, wherein the carbon footprint traceability certificate is a blockchain transaction hash and is converted to a two-dimensional code or digital label to be loaded on a factory bill or product of the batch of concrete.

Description

CO 2 in-situ mineralization and blockchain traceability system and method in concrete mixing system Technical Field The invention relates to the technical field of low-carbon manufacturing and digital authentication of building materials, in particular to a CO 2 in-situ mineralization and blockchain traceability system and method in a concrete mixing system. Background The cement concrete industry is one of the most prominent sources of carbon dioxide emissions worldwide, with carbon emissions accounting for about 7% -8% of the global man-made carbon emissions. The CO 2 mineralization maintenance technology is a potential carbon-negative technology, and the basic principle is that cement hydration products such as calcium hydroxide, calcium silicate hydrate and the like are utilized to carry out carbonation reaction with CO 2 to generate substances such as calcium carbonate CaCO 3, silica gel and the like with thermodynamic stability, so that CO 2 is permanently sealed in the concrete. The process not only can realize carbon fixation, but also can improve the early strength, wear resistance and durability of the concrete. However, the currently mainstream CO 2 curing technology generally has obvious technical bottlenecks and application limitations. The prior art generally arranges the mineralization process in a separate curing stage after the formation of the concrete element, for example by introducing high-pressure CO 2 gas into the prefabricated element in a curing kiln or in a closed chamber. This post-curing mode has the following inherent drawbacks: First, the reaction efficiency is low. Mineralization is carried out in the hardened concrete, CO 2 gas is slowly diffused through the formed compact microstructure mainly by means of concentration gradient, mass transfer resistance is extremely high, and reaction rate is severely limited. Long-time maintenance of several hours to tens of hours is generally required to achieve a certain carbon fixation depth and efficiency, and the continuous and rapid production and supply rhythm of modern ready-mixed concrete is difficult to meet. Second, it is disjointed from the mainstream production. The ready-mixed commercial concrete occupies most of the total yield of the concrete and is characterized by concentrated stirring, fluidized transportation and in-situ casting. The existing independent maintenance technology is difficult to be compatible with the continuous flow mode of stirring, transporting and pouring, and the application of the technology in wider markets is limited. Third, environmental benefits are difficult to quantify and manifest in a trusted manner. Despite the potential for carbon sequestration itself, the resulting carbon sequestration lacks accurate, real-time, transparent and widely accepted metering and nuclear evidence means. The existing method depends on theoretical calculation or staged detection, the data is easy to tamper and difficult to trace, and the strict requirements of a carbon trade market or a green building authentication system on the authenticity, verifiability and uniqueness of the data cannot be met, so that the environmental value of the data is difficult to realize the capitalization. In view of the foregoing, there is a need in the art for an innovative solution that can efficiently and cost-effectively embed the CO 2 mineralization process into existing concrete mixing processes, and that can provide real-time, tamper-resistant carbon credit data vouchers for each production unit. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a CO 2 in-situ mineralization and block chain traceability system and method in a concrete stirring system. In order to achieve the above purpose, the present invention provides the following technical solutions: a CO 2 in-situ mineralization and blockchain traceability system in a concrete mixing system, comprising: The CO 2 in-situ mineralization injection module is used for quantitatively introducing CO 2 into the mixture in the concrete stirring process; The carbon metering and data acquisition module is used for metering the amount of CO 2 introduced by the CO 2 in-situ mineralization injection module and calculating the net CO 2 storage amount of the batch of concrete based on the amount; And the blockchain carbon footprint tracing module is used for uploading batch production data comprising the CO 2 net sealing quantity to a blockchain network for certification and generating a tamper-proof carbon footprint digital certificate. Further, the CO 2 in-situ mineralization injection module is integrally connected with the concrete stirring host machine and comprises a CO 2 supply unit and an injection terminal, wherein the injection terminal is arranged in the stirring host machine or in a feed inlet area and is used for injecting gaseous CO 2 or a solution dissolved with CO 2 into a mixture in the stirring host machine. Further, the CO 2