CN214764516U - Device for mineralizing and sealing by carbon dioxide magnesium method - Google Patents
Device for mineralizing and sealing by carbon dioxide magnesium method Download PDFInfo
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- CN214764516U CN214764516U CN202120712947.0U CN202120712947U CN214764516U CN 214764516 U CN214764516 U CN 214764516U CN 202120712947 U CN202120712947 U CN 202120712947U CN 214764516 U CN214764516 U CN 214764516U
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Abstract
The utility model relates to a device of carbon dioxide magnesium method mineralization sealing up, including rich magnesium solution reation kettle, reaction tower, serpentine sediment storehouse, magnesite storehouse, serpentine thick liquids case, recovery water tank, mill thick liquids circulation case, wet ball mill, industrial water tank, ammonium chloride solution recovery case, serpentine batcher, magnesite filter, serpentine sediment swirler, magnesite swirler, serpentine raw slurry swirler, first vacuum belt hydroextractor and second vacuum belt hydroextractor. The device can effectively utilize serpentine and capture and fix carbon dioxide in flue gas to form stable magnesite, so that the national emission reduction target is realized; in the whole device, materials are transported by adopting a pipe chain, so that pollution is avoided; various screening circulating pipelines are designed, so that the recycling of materials is realized, and byproducts have higher economic added value, and are economic and environment-friendly; the flue gas discharged from the reaction device is the treated clean flue gas, and is environment-friendly.
Description
Technical Field
The utility model relates to a device for mineralizing and sealing by a carbon dioxide magnesium method, which belongs to the technical field of environmental protection.
Background
CO produced during industrial production and human life due to global dependence on fossil fuels2The emission is increased with the CO in the atmosphere2Gradual increase in concentration, CO2The impact on climate change is also increasing. To realize CO2The emission reduction target of (2) needs to artificially capture, fix or reuse the CO2 discharged into the atmosphere, and the current carbon dioxide sequestration technology mainly comprises: geological sequestration, ocean sequestration and mineral sequestration, wherein mineral sequestration is the most stable and effective carbon sequestration method, and mineral sequestration refers to sequestration of CO2Fixing in the form of stable mineral to form stable carbonate mineral.
The mineral sealing is more suitable for small and medium-sized emission sources (< 2.5Mt CO)2Accounting for 10% -15% of the total discharge amount), and the produced carbonate product has certain economic value, and the search for an industrially feasible process route is also the key point of research of scholars. Many demonstration experiments have been carried out in recent years, which are important to verify the feasibility of the technology, and also to bring it closer from laboratory experiments to commercial scale.
Pasquier and his team used serpentine tailings (magnesium silicate) from two closed mines in the south of Quebec, Canada to flue gas (CO) from one cement plant2Content of 12% -20%) intoThe method is applied to carbon sequestration pilot scale experiments, and because the serpentine tailings contain iron oxide and have large granularity, the tailings are not suitable for directly participating in the reaction, and the tailings need to be pretreated, the experimental energy consumption is increased; a research team from the university of Aalto and university of boAkademi, finland, developed a method named Slag2PCC, which uses steel Slag waste in a steel converter (basic oxygen furnace, BOF) as a calcium source instead of natural limestone to absorb carbon dioxide, but this method does not consider the treatment of waste liquid generated during the reaction and has not yet formed a mature process.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a device that carbon dioxide magnesium method mineralize mineralization was sealed up and is deposited to solve the problem that the high energy consumption is costly in the raw materials ore pretreatment and the problem of liquid water disposal in the processing link among the current method.
Technical scheme
A device for mineralizing and sealing by a carbon dioxide magnesium method comprises a magnesium-rich solution reaction kettle, a reaction tower, a serpentine slag bin, a magnesite bin, a serpentine slurry tank, a recovery water tank, a mill slurry circulation tank, a wet ball mill, an industrial water tank, an ammonium chloride solution recovery tank, a serpentine feeder, a magnesite filter, a serpentine slag cyclone, a magnesite cyclone, a serpentine raw slurry cyclone, a first vacuum belt dehydrator and a second vacuum belt dehydrator;
the top of the magnesium-rich solution reaction kettle is provided with a catalyst inlet and an ammonia outlet, the ammonia outlet is communicated with an inlet on the side wall of the reaction tower, the side wall of the magnesium-rich solution reaction kettle is provided with a serpentine slurry valve, and an outlet at the bottom of the magnesium-rich solution reaction kettle is communicated with a serpentine slag cyclone; the top outlet of the serpentine slag cyclone is connected with a serpentine slag filter, and the bottom outlet of the serpentine slag filter is respectively communicated with a serpentine slurry valve of a magnesium-rich solution reaction kettle and a magnesium-rich solution valve on a reaction tower through pipelines; the bottom outlet of the serpentine slag cyclone is connected with a first vacuum belt dehydrator, the liquid outlet of the first vacuum belt dehydrator is connected with a recovery water tank, and the solid outlet of the first vacuum belt dehydrator is connected with a serpentine slag bin;
the serpentine feeder, the wet ball mill and the mill slurry circulation box are sequentially connected, an outlet of the mill slurry circulation box is connected with a serpentine raw slurry cyclone through a pipeline and a mill slurry circulation pump, a bottom outlet of the serpentine raw slurry cyclone is connected with the wet ball mill, and a top outlet of the serpentine raw slurry cyclone is connected with the serpentine slurry box; an outlet of the serpentine slurry tank is connected with a serpentine slurry valve on the magnesium-rich solution reaction kettle through a pipeline and a serpentine slurry delivery pump;
an exhaust valve is arranged at the top of the reaction tower, the lower part of the side wall of the reaction tower is communicated with industrial flue gas through a pipeline and a flue gas pump, an outlet at the bottom of the reaction tower is connected with a magnesite swirler, an outlet at the top of the magnesite swirler is connected with a magnesite filter, an outlet of the magnesite filter is connected with an ammonium chloride solution recovery box, an outlet at the bottom of the magnesite swirler is connected with a second vacuum belt dehydrator, a liquid outlet of the second vacuum belt dehydrator is connected with the ammonium chloride solution recovery box, and a solid outlet of the second vacuum belt dehydrator is connected with a magnesite bin; the outlet of the ammonium chloride solution recovery box is connected with the wet ball mill through a pipeline and an ammonium chloride solution pump; an outlet of the recovery water tank is communicated with an inlet at the upper part of the side wall of the reaction tower through a pipeline and a recovery water pump;
the industrial water tank is connected with the first vacuum belt dehydrator and the second vacuum belt dehydrator through a pipeline and an industrial water pump.
Further, a self-suction stirrer is arranged in the magnesium-rich solution reaction kettle.
Furthermore, 3 layers of sprayers are arranged in the reaction tower, each layer is provided with a spray head, and the maximum volume of the reaction tower is 2.2m3And the swirling flow in the spray which is conveyed to the top of the absorption tower by the liquid conveying pump is dispersed into fine liquid drops to be sprayed, so that gas-liquid contact is realized, and the absorption effect of carbon dioxide gas is further improved.
Furthermore, the top in the reaction tower is provided with a demister, which can condense water drops discharged along with flue gas to reduce the loss of absorption liquid.
The method for carrying out magnesium mineralization and storage on carbon dioxide in flue gas by using the device comprises the following steps:
(1) water is injected into the reaction tower by opening the related valves, and the total water content is controlled to be 1.7-1.8 m3To (c) to (d);
(2) opening the liquid pump, adjusting the valve, and introducing part of the water in the reaction tower into the ammonium chloride solution recovery tank, wherein the water amount is generally controlled at 0.3 m3Adding ammonium chloride solid into an ammonium chloride solution recovery tank, primarily stirring and sealing;
(3) putting serpentine into a feeder, opening a wet ball mill, stirring the serpentine in a magnesium-rich solution reaction kettle, and adjusting a liquid path valve to realize internal circulation of reaction liquid;
(4) opening NH3The valve is adjusted to the required flow, and the pH value of the solution is continuously detected through the liquid sampling port;
(5) when the pH value of the reaction liquid is close to 10, a flue gas pump is opened, the flow is adjusted, and CO is enabled to be in a state2The percentage content is about 15 percent;
(6) detecting and recording the pH value of the reaction solution every 5 minutes, and introducing CO2Content and export of CO2Content (c);
(7) continuously running for 3-4 hours;
(8) NH shut off3The valve is used for closing the flue gas pump, closing the wet ball mill, closing the liquid circulating pump and closing the stirrer;
(9) the reaction solution was removed and the apparatus was washed with clean water.
The utility model has the advantages that: the utility model provides a device for mineralizing and sealing by a carbon dioxide-magnesium method, which can effectively utilize serpentine and collect and fix carbon dioxide in flue gas to form stable magnesite, thereby realizing the national emission reduction target; in the whole device, materials are transported by adopting a pipe chain, so that pollution is avoided; various screening circulating pipelines are designed, so that the recycling of materials is realized, and byproducts have higher economic added value, and are economic and environment-friendly; the flue gas discharged from the reaction device is the treated clean flue gas, and is environment-friendly.
Drawings
FIG. 1 is a schematic structural diagram of a device for capturing carbon dioxide in flue gas by a magnesium method according to the present invention;
in the figure, 1-a magnesium-rich solution reaction kettle; 2-a reaction tower; 3-serpentine slag bin; 4-magnesite ore bin; 5-serpentine slurry tank; 6-a recovery water tank; 7-mill slurry circulation box; 8-wet ball mill; 9-an industrial water tank; 10-ammonium chloride solution recovery tank; 11-serpentine feeder; 12-magnesite filters; 13-serpentine slag filter; 14-serpentine slag cyclone; 15-magnesite cyclone; 16-serpentine raw slurry cyclone; 17-an addition funnel; 18-serpentine slurry delivery pump; 19-a sprayer; 20-a magnesium rich solution pump; 21-a flue gas pump; 22-ammonium chloride solution pump; 23-industrial water pump; 24-mill slurry circulation pump; 25-a recovery water pump; 26-a first vacuum belt dehydrator; 27-a second vacuum belt dehydrator; 28-self-priming agitator; 29-serpentine slurry valve; 30-a catalyst inlet; 31-ammonia outlet; 32-an exhaust valve; 33-magnesium rich solution valve.
Detailed Description
In order to make the objects and advantages of the present invention more clearly understood, the technical solution of the present invention is specifically described below with reference to the accompanying drawings and specific embodiments. It is to be understood that the following text is only intended to describe one or several particular embodiments of the invention, and does not strictly limit the scope of the claims specifically claimed.
Example 1
As shown in fig. 1, a device for mineralizing and sealing by a carbon dioxide magnesium method comprises a magnesium-rich solution reaction kettle 1, a reaction tower 2, a serpentine slag bin 3, a magnesite slag bin 4, a serpentine slurry tank 5, a recovery water tank 6, a mill slurry circulation tank 7, a wet ball mill 8, an industrial water tank 9, an ammonium chloride solution recovery tank 10, a serpentine feeder 11, a magnesite filter 12, a serpentine slag filter 13, a serpentine slag cyclone 14, a magnesite cyclone 15, a serpentine crude slurry cyclone 16, a first vacuum belt dehydrator 26 and a second vacuum belt dehydrator 27;
a self-suction stirrer 28 is arranged in the magnesium-rich solution reaction kettle 1, a catalyst inlet 30 and an ammonia gas outlet 31 are arranged at the top of the magnesium-rich solution reaction kettle 1, the ammonia gas outlet 31 is communicated with an inlet on the side wall of the reaction tower, a serpentine slurry valve 29 is arranged on the side wall of the magnesium-rich solution reaction kettle 1, and an outlet at the bottom of the magnesium-rich solution reaction kettle 1 is communicated with the serpentine slag cyclone 14; the top outlet of the serpentine slag cyclone 14 is connected with a serpentine slag filter 13, the bottom outlet of the serpentine slag filter 13 is communicated with a serpentine slurry valve 29 of the magnesium-rich solution reaction kettle 1 through a pipeline, and the bottom outlet of the serpentine slag filter 13 is also communicated with a magnesium-rich solution valve 33 on the reaction tower 2 through a pipeline and a magnesium-rich solution pump 20; the bottom outlet of the serpentine slag cyclone 14 is connected with a first vacuum belt dehydrator 26, the liquid outlet of the first vacuum belt dehydrator 26 is connected with the recovery water tank 6, and the solid outlet of the first vacuum belt dehydrator 26 is connected with the serpentine slag bin 3;
the serpentine feeder 11, the wet ball mill 8 and the mill slurry circulation box 7 are sequentially connected, an outlet of the mill slurry circulation box 7 is connected with a serpentine raw slurry cyclone 16 through a pipeline and a mill slurry circulation pump 24, a bottom outlet of the serpentine raw slurry cyclone 16 is connected with the wet ball mill 8, and a top outlet of the serpentine raw slurry cyclone 16 is connected with the serpentine slurry box 5; an outlet of the serpentine slurry tank 5 is connected with a serpentine slurry valve 29 on the magnesium-rich solution reaction kettle 1 through a pipeline and a serpentine slurry delivery pump 18;
the volume of the reaction tower 2 is 2.2m33 layers of sprayers 19 are arranged in the reaction kettle, each layer is provided with a spray head, the reaction liquid is conveyed to the spray at the top of the absorption tower through a liquid conveying pump, the swirling flow is dispersed into fine liquid drops to be sprayed down, gas-liquid contact is realized, the absorption effect of carbon dioxide gas is further improved, and the conveying flow of the liquid conveying pump is 3m3H is used as the reference value. The demister is arranged at the top end in the reaction tower 2, and water drops discharged along with the simulated flue gas are condensed to reduce the loss of the absorption liquid. The top of the reaction tower 2 is provided with an exhaust valve 32, the lower part of the side wall of the reaction tower 2 is communicated with industrial flue gas through a pipeline and a flue gas pump 21, the bottom outlet of the reaction tower 2 is connected with a magnesite cyclone 15, the top outlet of the magnesite cyclone 15 is connected with a magnesite filter 12, the outlet of the magnesite filter 12 is connected with an ammonium chloride solution recovery box 10, and the exhaust valve 32 is arranged on the top of the reaction tower 2The bottom outlet of the magnesite cyclone 15 is connected with a second vacuum belt dehydrator 27, the liquid outlet of the second vacuum belt dehydrator 27 is connected with an ammonium chloride solution recovery box 10, and the solid outlet of the second vacuum belt dehydrator 27 is connected with a magnesite bin 4; the outlet of the ammonium chloride solution recovery box 10 is connected with the wet ball mill 8 through a pipeline and an ammonium chloride solution pump 22; the ammonium chloride solution recovery box is provided with an ammonium chloride feeding port which is connected with a feeding funnel 17; the outlet of the recovery water tank 6 is communicated with the inlet at the upper part of the side wall of the reaction tower 2 through a pipeline and a recovery water pump 25;
the industrial water tank 9 is connected to a first vacuum belt dehydrator 26 and a second vacuum belt dehydrator 27 through a pipe and an industrial water pump 23.
The device can effectively utilize serpentine and capture and fix carbon dioxide in flue gas to form stable magnesite, so that the national emission reduction target is realized; in the whole device, materials are transported by adopting a pipe chain, so that pollution is avoided; various screening circulating pipelines are designed, so that the recycling of materials is realized, and byproducts have higher economic added value, and are economic and environment-friendly; the flue gas discharged from the reaction device is the treated clean flue gas, and is environment-friendly.
The device is used for carrying out magnesium mineralization and storage on carbon dioxide in flue gas, 600 MW units of a certain coal-fired power plant are taken as research objects, and the actual flue gas is extracted by 2000 m3(standard condition wet flue gas)/h is equivalent to the flue gas amount of a 0.6 MW unit, and the device is used for capturing CO in the sealed flue gas2The concrete parameters are as follows: the tower height: 8 m; gas-liquid ratio in the reaction tower is 1: 18; concentration of Mg in the magnesium-rich solution: 0.16 mol/L; liquid pump flow rate: 3m2H; flue gas pump flow: 54 m2H; flue gas CO2The content is as follows: 15 percent;
after 3 hours of operation, the results were as follows: flue gas exhaust valve CO2The content is as follows: 1.1 percent; CO22Absorption efficiency: 92 percent; fixation of CO per hour2: 16 kg; energy consumption per hour: 1.47 kWh; fix per ton of CO2Energy consumption: 91 kWh; fix per ton of CO2Cost: 809-1325 yuan. As the solution generated by the reaction is rich in ammonium chloride, the process conditions can allowAmmonium chloride is extracted to react with the alkaline substances of calcium and magnesium to regenerate ammonia gas, so that the reuse of ammonia is realized, and the cost is further reduced. Furthermore, the synthesized solid product may have a certain industrial value, such as the production of magnesium cement and the like. The actual cost of fixing the carbon dioxide can be further reduced.
Claims (4)
1. A device for mineralizing and sealing by a carbon dioxide magnesium method is characterized by comprising a magnesium-rich solution reaction kettle (1), a reaction tower (2), a serpentine slag bin (3), a magnesite slag bin (4), a serpentine slurry tank (5), a recovery water tank (6), a mill slurry circulation tank (7), a wet ball mill (8), an industrial water tank (9), an ammonium chloride solution recovery tank (10), a serpentine feeder (11), a magnesite filter (12), a serpentine slag filter (13), a serpentine slag cyclone (14), a magnesite cyclone (15), a serpentine raw slurry cyclone (16), a first vacuum belt dehydrator (26) and a second vacuum belt dehydrator (27);
a catalyst inlet (30) and an ammonia gas outlet (31) are formed in the top of the magnesium-rich solution reaction kettle (1), the ammonia gas outlet (31) is communicated with an inlet in the side wall of the reaction tower, a serpentine slurry valve (29) is formed in the side wall of the magnesium-rich solution reaction kettle (1), and an outlet in the bottom of the magnesium-rich solution reaction kettle (1) is communicated with a serpentine slag cyclone (14); the top outlet of the serpentine slag cyclone (14) is connected with a serpentine slag filter (13), and the bottom outlet of the serpentine slag filter (13) is respectively communicated with a serpentine slurry valve (29) of the magnesium-rich solution reaction kettle (1) and a magnesium-rich solution valve (33) on the reaction tower (2) through pipelines; the bottom outlet of the serpentine slag cyclone (14) is connected with a first vacuum belt dehydrator (26), the liquid outlet of the first vacuum belt dehydrator (26) is connected with a recovery water tank (6), and the solid outlet of the first vacuum belt dehydrator (26) is connected with the serpentine slag bin (3);
the serpentine feeder (11), the wet ball mill (8) and the mill slurry circulation box (7) are sequentially connected, an outlet of the mill slurry circulation box (7) is connected with a serpentine raw slurry cyclone (16) through a pipeline and a mill slurry circulation pump (24), a bottom outlet of the serpentine raw slurry cyclone (16) is connected with the wet ball mill (8), and a top outlet of the serpentine raw slurry cyclone (16) is connected with the serpentine slurry box (5); an outlet of the serpentine slurry tank (5) is connected with a serpentine slurry valve (29) on the magnesium-rich solution reaction kettle (1) through a pipeline and a serpentine slurry delivery pump (18);
an exhaust valve (32) is arranged at the top of the reaction tower (2), the lower part of the side wall of the reaction tower (2) is communicated with industrial flue gas through a pipeline and a flue gas pump (21), the bottom outlet of the reaction tower (2) is connected with a magnesite cyclone (15), the top outlet of the magnesite cyclone (15) is connected with a magnesite filter (12), the outlet of the magnesite filter (12) is connected with an ammonium chloride solution recovery box (10), the bottom outlet of the magnesite cyclone (15) is connected with a second vacuum belt dehydrator (27), the liquid outlet of the second vacuum belt dehydrator (27) is connected with an ammonium chloride solution recovery box (10), and the solid outlet of the second vacuum belt dehydrator (27) is connected with a magnesite bin (4); an outlet of the ammonium chloride solution recovery box (10) is connected with the wet ball mill (8) through a pipeline and an ammonium chloride solution pump (22); an outlet of the recovery water tank (6) is communicated with an inlet at the upper part of the side wall of the reaction tower (2) through a pipeline and a recovery water pump (25);
the industrial water tank (9) is connected with the first vacuum belt dehydrator (26) and the second vacuum belt dehydrator (27) through a pipeline and an industrial water pump (23).
2. The apparatus for carbon dioxide-magnesium mineralization-sequestration as claimed in claim 1, wherein a self-priming agitator (28) is provided in the reaction vessel for the magnesium-rich solution.
3. The apparatus for carbon dioxide magnesian mineralization sequestration as claimed in claim 1, wherein the reaction tower is provided with 3 layers of sprayers (19), each layer having a spray head.
4. The apparatus for carbon dioxide magnesium mineralization-sequestration as claimed in claim 1, 2 or 3, wherein a demister is arranged at the top of the reaction tower.
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| CN202120712947.0U CN214764516U (en) | 2021-04-08 | 2021-04-08 | Device for mineralizing and sealing by carbon dioxide magnesium method |
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| CN202120712947.0U CN214764516U (en) | 2021-04-08 | 2021-04-08 | Device for mineralizing and sealing by carbon dioxide magnesium method |
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