A co2 sequestration carrier, method of manufacture and apparatus

Abstract

The application discloses a CO2 storage carrier, a preparation method and a device, which comprise the following components in percentage by mass: quartz: 30.10-40.45%, borax: 8.75-14.3%, calcium oxide: 5.13-7.20%, magnesium oxide: 5.50-7.52%, sodium carbonate: 1.87-3.47%, sodium sulfate: 0.12-0.53%, sodium phosphate: 0.23-0.82%, a stable dispersing agent: 0.06-0.33%, a surfactant: 0.02-0.13%, and water: 35-45%. The application comprises the following steps in the preparation: (1) preparing a slurry; (2) preparing a CO2 storage carrier precursor; and (3) preparing the CO2 storage carrier. The CO2 storage carrier provided by the application can wrap carbon dioxide gas inside, can realize carbon storage, and can help realize the vision of carbon neutrality as soon as possible.

Description

Technical Field

[0001] This invention relates to the field of non-metallic material preparation technology, and in particular to a CO2 encapsulation carrier, preparation method and apparatus. Background Technology

[0002] Against the backdrop of global climate change, increased greenhouse gas emissions are leading to a continuously intensifying greenhouse effect, severely impacting human survival and development. Controlling carbon dioxide emissions is considered a key measure to mitigate global climate change.

[0003] Carbon capture and storage (CCS) technology is a key tool for zero-carbon and carbon-negative production worldwide, especially for the power industry, which accounts for nearly 70% of China's CO2 emissions, and other industrial sectors where emission reduction is difficult. CCS technology refers to the technology of separating carbon dioxide generated by industrial sectors and then storing it in a carrier. Although CCS technology plays an important role in reducing carbon dioxide emissions, it still faces significant limitations and challenges at the current technological level. CCS technology can be mainly divided into two types: physical storage and chemical storage. The technical principles are: (1) storage through a closed-pore structure; (2) absorption through chemical reaction. Currently, the storage carriers for CCS are mainly geological structures such as underground rocks, depleted oil and gas fields, and seafloor saline water layers. The investment cost of complete sets of technologies is high, the stored carriers are difficult to reuse, and there is a great risk of leakage. It is difficult to promote and apply them on a large scale when the economic benefits are not obvious. Summary of the Invention

[0004] The present invention aims to solve the problems of high leakage risk and difficulty in reusing the carrier in existing CCS technology.

[0005] The technical solution of the present invention is: a CO2 encapsulation carrier, comprising the following components by mass percentage:

[0006] Quartz: 30.10–40.45%

[0007] Borax: 8.75–14.3%

[0008] Calcium oxide: 5.13–7.20%

[0009] Magnesium oxide: 5.50–7.52%

[0010] Sodium carbonate: 1.87–3.47%

[0011] Sodium sulfate: 0.12–0.53%

[0012] Sodium phosphate: 0.23–0.82%

[0013] Stabilizing dispersant: 0.06–0.33%

[0014] Surfactant: 0.02–0.13%

[0015] Water: 35-45%.

[0016] The stabilizing dispersant is one or more of sodium polyacrylate, sodium tripolyphosphate, and polyethylene glycol mixed in any proportion.

[0017] The surfactant is either a fluorocarbon surfactant or an organosilicon surfactant.

[0018] The purpose of the calcium oxide and magnesium oxide is to react with CO2 in the atmosphere during the preparation of the CO2 encapsulation carrier, thereby chemically absorbing CO2.

[0019] A method for preparing a CO2 encapsulation carrier includes the following steps:

[0020] (1) Preparation of precursor material slurry;

[0021] (2) Based on precursor material slurry, CO2 encapsulation carrier precursor was prepared;

[0022] (3) Based on the CO2 storage carrier precursor, prepare a CO2 storage carrier filled with carbon dioxide gas.

[0023] Step (1) includes: weighing each component of the raw material, mixing and stirring each component of the raw material for 10 to 20 minutes, and then pumping it to a ball mill to obtain a slurry with a solid content of 55% to 65% and a particle size of ≤10μm.

[0024] Step (2) includes: pumping the slurry prepared in step (1) into a spray granulation equipment and spraying it under the conditions of an inlet temperature of 260-450°C, an outlet temperature of 120-160°C, and a centrifugal speed of 10000-16500 rpm. The spray atmosphere is carbon dioxide gas, and the collected powder is a CO2 encapsulation carrier precursor with a diameter of 1-100 μm.

[0025] Step (3) includes: pumping the CO2 storage carrier precursor prepared in step (2) to the upper section of the main tower. The CO2 storage carrier precursor is vitrified by high temperature as it descends from the upper section of the main tower to the lower section cone to form a CO2 storage carrier. The high temperature inside the main tower is 600-900℃. At the same time, carbon dioxide gas mixing is performed.

[0026] The main tower includes a gas distribution system and a heating system. The gas supplied by the gas distribution system is carbon dioxide. The high-temperature zone of the heating system has a temperature of 600-900℃, which is intended to create reaction conditions for the chemical absorption of CO2 and accelerate the CO2 solidification reaction.

[0027] Among them, the sources of carbon dioxide in the CO2 storage carrier are: (1) carbon dioxide introduced during spray granulation and vitrification is absorbed and solidified by magnesium oxide and calcium oxide in the raw materials in the form of chemical reaction; (2) carbon dioxide is entrained and physically stored during the formation of the closed-pore structure of the storage carrier.

[0028] An apparatus for preparing a CO2 encapsulation carrier, used to prepare a CO2 encapsulation carrier;

[0029] The preparation apparatus includes a high-temperature energy-saving furnace, which includes a main tower. A slurry tank connected to the top of the upper section of the main tower via a guide shroud is provided. A first recovery unit is connected to one side of the bottom of the upper section. The upper part of the first recovery unit is connected to a second recovery unit via a pipe. The upper part of the second recovery unit is connected to an induced draft fan via a pipe.

[0030] The lower section of the main tower is conical, and ventilation holes are provided at the bottom of the lower section of the main tower.

[0031] An apparatus for preparing a CO2 encapsulation carrier further includes a hot blast furnace output pipe and a tail gas exhaust pipe.

[0032] The hot air furnace output pipe is connected to a flow guide shroud.

[0033] One end of the exhaust pipe is connected to the deflector, and the other end is connected to the induced draft fan.

[0034] This invention proposes an integrated approach to CO2 physical and chemical sequestration, thereby improving carbon sequestration capabilities.

[0035] In the CO2 encapsulation carrier preparation method provided by the present invention, the preparation atmosphere is carbon dioxide, and carbon dioxide is encapsulated in the hollow structure during the formation of the porous structure of the CO2 encapsulation carrier.

[0036] The method for preparing a CO2 encapsulation carrier provided by this invention uses raw materials that can react with carbon dioxide in the preparation atmosphere, thereby improving the carbon fixation capability of the encapsulation carrier.

[0037] The CO2 storage carrier provided by this invention has a closed-pore structure that encapsulates a large amount of carbon dioxide gas, which reduces the risk of leakage compared with conventional storage carriers.

[0038] The spray granulation method and its formulation used in this invention have high yield, and the prepared CO2 storage carrier has a narrow particle size distribution, high porosity, and high closed-pore ratio, which increases the sealed space required for carbon dioxide storage and thus improves the carbon dioxide storage rate.

[0039] The present invention sets up a first-stage and a second-stage recoverer, which increases the recovery rate of CO2 storage carrier and avoids the storage carrier being sucked into the induced draft fan or discharged into the equipment operating environment.

[0040] The CO2 storage carrier provided by this invention has excellent mechanical and thermal insulation properties, can be reused, and is suitable for industrial fields such as construction, coating, and plastics. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the CO2 encapsulation carrier device of the present invention.

[0042] 1-Hot air furnace output pipe, 2-Slurry tank, 3-Guide hood, 4-Main tower, 5-First recovery unit, 6-Second recovery unit, 7-Induced draft fan, 8-Tail exhaust pipe, 9-Storage silo. Detailed implementation method:

[0043] To further describe the present invention, the following embodiments are provided to further illustrate a CO2 encapsulation carrier, its preparation method, and its apparatus. However, the present invention is not limited to these embodiments.

[0044] The specific implementation process of the CO2 encapsulation carrier, preparation method and apparatus of the present invention is as follows:

[0045] (1) Preparation of slurry: Weigh each component of the raw material; mix and stir each component of the raw material for 10 to 20 minutes, then pump it to a ball mill to obtain a slurry with a solid content of 55 to 65% and a particle size ≤ 10 μm.

[0046] (2) Preparation of CO2 encapsulation carrier precursor: The slurry prepared in step (1) is pumped to a spray granulation equipment. The spray atmosphere is carbon dioxide gas, the inlet temperature is 260-450℃, the outlet temperature is 120-160℃, and the centrifugal speed is 10000-16500rpm. The collected powder is the CO2 encapsulation carrier precursor with a diameter of 1-100μm. The obtained CO2 encapsulation carrier precursor has the characteristics of good flowability and narrow particle size distribution.

[0047] (3) Preparation of CO2 storage carrier: The CO2 storage carrier precursor prepared in step (2) is pumped to the upper section of the high-temperature main tower of the high-temperature energy-saving furnace. When the CO2 storage carrier precursor descends from the upper section of the main tower to the lower conical section, it is subjected to the synergistic effect of the heating system and the carbon dioxide gas distribution system. At the same time as the shell of the CO2 storage carrier vitrifies, carbon dioxide is entrained into the hollow structure. The prepared CO2 storage carrier falls into the first and second stage recovery units under the action of the induced draft fan, is cooled and collected, and finally the CO2 storage carrier is obtained.

[0048] The preparation process of Examples 1 to 4 is the same, and the formula and preparation parameters are shown in Table 1. The upper and lower limits and ranges of the proportions of each additive and the spray granulation process parameters involved in this invention can all achieve the present invention. Examples are not listed one by one here.

[0049]

[0050] It can be observed that the particle size of the CO2 encapsulation carrier can be controlled by adjusting the raw material composition and process. Gas chromatography coupled with TG-FTIR was used to test the gas inside the encapsulation carrier, demonstrating that the carbon dioxide concentration reached over 90%.

[0051] The present invention provides a CO2 encapsulation carrier that encapsulates a large amount of carbon dioxide gas inside the CO2 encapsulation carrier, thereby increasing carbon capture and protecting the environment.

[0052] Due to their high porosity and closed hollow structure, CO2 sequestration carriers are excellent containers for storing carbon dioxide, enabling large-scale carbon dioxide sequestration. Furthermore, the performance of CO2 sequestration carriers is not affected after carbon dioxide sequestration, and the sequestered gas is very difficult to leak when used at normal temperature and pressure. Therefore, CO2 sequestration carriers are of great significance for industrial carbon neutrality.

[0053] This invention proposes a novel carbon dioxide sequestration carrier. By designing the raw material composition to create conditions for the chemical absorption of carbon dioxide and by designing the preparation process to create a closed-pore structure for the physical storage of carbon dioxide, the invention successfully achieves the integration of physical and chemical sequestration of carbon dioxide. Furthermore, the prepared carbon dioxide carrier has excellent mechanical and thermal insulation properties and can be reused in industrial fields such as construction, plastics, and coatings.

[0054] Regarding the information disclosed in this case, the following points need to be clarified:

[0055] (1) The accompanying drawings of the embodiments disclosed in this case only involve the structures involved in the embodiments disclosed in this case. Other structures can be referred to the general design.

[0056] (2) Where there is no conflict, the embodiments and features disclosed in this case can be combined with each other to obtain new embodiments;

[0057] The above are merely specific embodiments disclosed in this case, but the scope of protection of this disclosure is not limited thereto. The scope of protection disclosed in this case shall be determined by the scope of protection of the claims.

Claims

1. A CO2 sequestration carrier, characterized by, The raw materials of the sealing carrier include the following components by mass percentage: Quartz: 30.10-40.45% Borax: 8.75～14.3% Calcium oxide: 5.13-7.20% Magnesium oxide: 5.50-7.52% Sodium carbonate: 1.87-3.47% Sodium sulfate: 0.12-0.53% Sodium phosphate: 0.23-0.82% Stable dispersant: 0.06-0.33% Surfactant: 0.02-0.13% Water: 35-45%; The raw materials of the sealing carrier are vitrified under high temperature to form the CO2 sealing carrier.

2. The CO2 storage carrier according to claim 1, wherein The stable dispersant is one or more of sodium polyacrylate, sodium tripolyphosphate and polyethylene glycol mixed in any ratio.

3. The CO2 storage carrier of claim 1, wherein The surfactant is fluorocarbon surfactant or silicone surfactant.

4. A method of producing a CO2 sequestration carrier according to any one of claims 1 to 3, characterized in that, The method includes the following steps: (1) preparing a precursor slurry; (2) preparing a CO2 sealing carrier precursor based on the precursor slurry; (3) preparing a CO2 sealing carrier filled with carbon dioxide gas based on the CO2 sealing carrier precursor.

5. The method of claim 4, wherein the CO2 storage carrier is prepared by the steps of: Step (1) includes weighing each component of the raw materials, mixing and stirring the raw materials for 10-20 minutes, and then pumping into a ball mill to prepare a slurry with a solid content of 55-65% and a particle size of ≤10 μm.

6. The method of claim 4, wherein the CO2 storage carrier is prepared by the steps of: Step (2) includes pumping the slurry prepared in step (1) to a spray granulation device, spray granulating under the conditions of an inlet temperature of 260-450 ℃, an outlet temperature of 120-160 ℃, and a centrifugal speed of 10,000-16,500 rpm, wherein the spray atmosphere is carbon dioxide gas, and the collected powder is a CO2 sealing carrier precursor with a diameter of 1-100 μm.

7. The method of claim 4, wherein the CO2 storage carrier is prepared by the steps of: Step (3) includes pumping the CO2 sealing carrier precursor prepared in step (2) to the upper section of a main tower, and the CO2 sealing carrier precursor is vitrified under high temperature during its descent from the upper section to the lower section of the tower to form a CO2 sealing carrier; wherein the temperature of the main tower is 600-900 ℃, and carbon dioxide is simultaneously supplied.

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