CN209188467U - A kind of device for sealing carbon dioxide in flue gas up for safekeeping using rich magnesium mineral - Google Patents
A kind of device for sealing carbon dioxide in flue gas up for safekeeping using rich magnesium mineral Download PDFInfo
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- CN209188467U CN209188467U CN201821976037.8U CN201821976037U CN209188467U CN 209188467 U CN209188467 U CN 209188467U CN 201821976037 U CN201821976037 U CN 201821976037U CN 209188467 U CN209188467 U CN 209188467U
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Abstract
The utility model relates to a kind of devices for sealing carbon dioxide in flue gas up for safekeeping using rich magnesium mineral comprising flow container, blistering reaction kettle, liquid ammonia vaporization sled, magnesium carbonate refining kettle, the first filtrate tank, the second filtrate tank, ammonium chloride crystals kettle, concentrated hydrochloric acid storage tank, flue gas surge tank, recycled offgas cooler, three-level absorption tower, the first centrifuge, the second centrifuge, third centrifuge, the first drying machine, the second drying machine and single effect evaporator is concentrated in rich magnesium mineral.The device can effectively utilize rich magnesium mineral, and the carbon dioxide in flue gas is trapped and fixed, and realize national emission reduction targets, in package unit, material is transported using pipe chain, is avoided pollution, design has filtrate cycle pipeline, realizes the recycling of material, economic and environment-friendly；The tail gas being discharged from reaction unit can discharge again by vent gas treatment, environmentally friendly；The device of a whole set of carbon sequestration assembly line have the characteristics that it is detachable, be easy to transport, convenient for adaptation to local conditions carry out mineral and seal up for safekeeping.
Description
Technical field
The utility model relates to a kind of devices of carbon sequestration sequestration of carbon dioxide, especially a kind of to seal cigarette up for safekeeping using rich magnesium mineral
The device of carbon dioxide in gas.
Background technique
The CO2 emissions generated during dependence due to the whole world to fossil fuel, industrial production and human lives
Increasingly increase, caused greenhouse effects are seriously threatening earth environment.The trapping of carbon dioxide and Plugging Technology Applied be by
Carbon dioxide collects from large-scale emission source and is stored into place appropriate, to avoid being discharged into atmosphere.
It is sealed up for safekeeping due to mineral and is more suitable for middle-size and small-size emission source (< 2.5MtCO2, account for total release 10-15%) and generate carbon
Hydrochlorate product has certain economic value, and seeking industrial viable process route is also the emphasis that scholars study.It is close several
Carried out many demonstrations in year to test, this be for the feasibility of verification technique it is critically important, also make it from laboratory experiment to quotient
Industry scale closer to.
Pasquier and his team have used the southern two setting serpentine tailings closed in mine in Quebec, Canada
Flue gas (the CO that (magnesium silicate) discharges a cement plant2Content is 12%-20%) carbon sequestration pilot experiment has been carried out, due to serpentine
Contain iron oxide, and the larger unsuitable directly participation reaction of granularity of tailing in tailing, needs to carry out pre-treatment to tailing, lead to reality
Test energy consumption increase；Research team from Aalto university, Finland and boAkademi university develops a kind of entitled Slag2PCC
Method, using the steel slag waste material in steel converter (basic oxygen furnace, BOF) as calcium source replace natural limestone to carbon dioxide
It is absorbed, but the method does not consider the processing to waste liquid is generated in reaction process, there are no the techniques for forming a set of maturation.
China salt lake magnesium resource is abundant, containing largely with magnesium existing for chloride and sulphate form in salt lake saline.It will
Salt lake saline is placed in the former halogen pond for shining saltworks, produces carnallite (KMgCl by adjusting pH3·6H2O), carnallite is carried out into one
Potassium chloride (KCl) and old brine are generated after step processing, the dominant cation ingredient of old brine is Mg2+And Na+, old brine is passed through
Old halogen pond, progress solarization, which is dried, ultimately generates rich magnesium mineral.Cha Er Han Salt Lake positioned at China Caidamu Basin can provide super
The rich magnesium mineral for crossing 2,000,000,000 tons are that good carbon dioxide mineral seal raw material up for safekeeping.
Utility model content
Dioxy in flue gas is sealed up for safekeeping using rich magnesium mineral it is an object of the invention to overcome the deficiencies of the prior art and provide a kind of
Change carbon device, using the device can to carbon dioxide in flue gas realize effectively seal up for safekeeping, and can by-product light magnesium carbonate with
Ammonium chloride.
Technical solution
A kind of device for sealing carbon dioxide in flue gas up for safekeeping using rich magnesium mineral, including rich magnesium mineral concentration flow container, bubbling are anti-
Answer kettle, liquid ammonia vaporization sled, magnesium carbonate refining kettle, the first filtrate tank, the second filtrate tank, ammonium chloride crystals kettle, concentrated hydrochloric acid storage tank, cigarette
Gas surge tank, recycled offgas cooler, three-level absorption tower, the first centrifuge, the second centrifuge, third centrifuge, the first drying
Machine, the second drying machine and single effect evaporator；
The outlet of rich magnesium mineral concentration flow container is connected to the entrance of blistering reaction kettle, and the outlet of liquid ammonia vaporization sled and bubbling are anti-
The entrance of kettle is answered to be connected to, the outlet at bottom of blistering reaction kettle is connect with the first centrifuge, and the liquid outlet of the first centrifuge passes through
First filtrate tank and pump are connected to the entrance of the entrance of blistering reaction kettle and ammonium chloride crystals kettle respectively, the solid of the first centrifuge
Outlet is connected to by delivery pipe chain with the entrance of magnesium carbonate refining kettle, and the outlet at bottom of magnesium carbonate refining kettle and the second centrifuge connect
It connects, the liquid outlet of the second centrifuge is connected to by the second filtrate tank and pump with the entrance of magnesium carbonate refining kettle, the second centrifuge
Solid outlet connect with the first drying machine by delivery pipe chain；
The outlet of concentrated hydrochloric acid storage tank is connected to the entrance of ammonium chloride crystals kettle, and the outlet of ammonium chloride crystals kettle and third are centrifuged
The liquid outlet of machine connection, third centrifuge is connected to the entrance of rich magnesium mineral concentration flow container, and the outlet of third centrifuge passes through
Delivery pipe chain is connect with the second drying machine；The top exit of bubbling reactor is connected to three-level absorption tower, and three-level absorption tower goes out
Mouth is connected to the entrance of magnesium carbonate refining kettle, and another outlet on three-level absorption tower is connected to single effect evaporator；
The top exit of magnesium carbonate refining kettle is connected to by pipeline and recycled offgas cooler with the entrance of flue gas surge tank,
The outlet of flue gas surge tank is connected to by air-introduced machine with the entrance of blistering reaction kettle.
Further, first drying machine and the second drying machine are paddle-dryer.
Further, first centrifuge, the second centrifuge and third centrifuge be Horizontal type automatic scraper discharging from
Scheming.
Further, the recycled offgas cooler is fixed tube-sheet exchanger, and the heat exchanger tube of the inside is distributed in positive triangle.
The method for sealing carbon dioxide in flue gas up for safekeeping using above-mentioned apparatus, includes the following steps:
(1) rich magnesium mineral concentrate is pumped into blistering reaction kettle from rich magnesium mineral concentration flow container, opens liquid ammonia vaporization sled, leads to
Entering liquefied ammonia tune pH value of solution is 8 ~ 10；
(2) industrial smoke enters flue gas surge tank by flue, then enters blistering reaction kettle by air-introduced machine, 25 ~ 99
It is reacted at DEG C, obtains slurries and tail gas；
Tail gas from blistering reaction kettle top exit enter three-level absorption tower carry out pickling and alkali cleaning processing, obtain ammonium chloride and
Can direct emission alkali cleaning tail gas, 5 ~ 10% alkali cleaning tail gas is sent to magnesium carbonate refining kettle and is utilized, by ammonium chloride by single
Ammonium chloride product is formed after effect evaporator processing；
Slurries in blistering reaction kettle enter the first centrifuge from outlet at bottom and are centrifuged, and obtain magnesium carbonate ammonium water
Close object and filtrate；The main component of magnesium carbonate ammonium hydrate is (NH4)2Mg(CO3)2·4H2O、MgCO3·3H2O、Mg2CO3
(OH)2·3H2O、Mg2(OH)ClCO3·3H2O, the main component of filtrate are NH4Cl、MgCl2。
(3) filtrate after being centrifugated in the first centrifuge is sent into the first filtrate tank, then passes through pump and pipeline difference
Be sent into blistering reaction kettle and ammonium chloride crystals kettle, wherein send the amount of filtrate to ammonium chloride crystals kettle account for filtrate total amount 10 ~
30wt%；
Magnesium carbonate ammonium hydrate after being centrifugated in first centrifuge is delivered to magnesium carbonate purification by delivery pipe chain
Kettle, while the part alkali cleaning tail gas for being passed through water into magnesium carbonate refining kettle and being come out from three-level absorption tower, to carbon in refining kettle
Sour magnesium ammonium hydrate is refined, and slurries and recycled offgas are generated；Recycled offgas is returned into cigarette by recycled offgas cooler
Slurries are sent to the second centrifuge and are centrifuged by gas surge tank, obtain light magnesium carbonate crude product and refined soln；It refines molten
The main component of liquid is water.
(4) light magnesium carbonate crude product is delivered to the first drying machine by delivery pipe chain to be dried, obtains lightweight carbonic acid
Magnesium products；Refined soln is stored in the second filtrate tank, magnesium carbonate refining kettle is then sent back to by pump and pipeline and continues to participate in reaction；
(5) rich magnesium mineral are sent to ammonium chloride crystals kettle by delivery pipe chain, concentrated hydrochloric acid storage tank is opened, toward ammonium chloride crystals
Concentrated hydrochloric acid tune pH2 ~ 7 are added in kettle, obtain slurries after stirring, crystallizing in crystallization kettle, by slurries send to third centrifuge into
Row centrifuge separation, obtains ammonium chloride crude product and rich magnesium solution, sends rich magnesium solution back to rich magnesium mineral concentration flow container, and ammonium chloride is thick
Product are delivered to the second drying machine by delivery pipe chain and are dried, and obtain ammonium chloride product.
In step (1), rich magnesium mineral concentrate is the aqueous solution of rich magnesium mineral, and rich magnesium mineral shine in saltworks from salt lake
Old halogen pond, main component MgCl2·xH2O, Mg content are greater than 46%；The concentration of rich magnesium mineral concentrate is 3 ~ 6mol/L.
Further, in step (1), the flow that rich magnesium mineral concentrate enters blistering reaction kettle is 10 ~ 40m3/h。
Further, in step (2), the flow that flue gas is passed through bubbling reactor is 10 ~ 50 m3/h。
Further, in step (3), it is described to magnesium carbonate ammonium hydrate carry out purification refer to: by magnesium carbonate ammonium hydrate with
The mass ratio of water is 1:3 ~ 1:10 mixing, is warming up to 50 ~ 99 DEG C, stirs 20 ~ 80min.
Further, in step (4), the drying temperature of the first drying machine setting is 110-180 DEG C, time 0.5-
4h。
Further, in step (5), the drying temperature of the second drying machine setting is 80 ~ 150 DEG C, and the time is 0.5 ~ 1h.
The utility model has the beneficial effects that the utility model, which provides a set of utilization rich magnesium mineral, seals titanium dioxide in flue gas up for safekeeping
The device of carbon, which can effectively utilize rich magnesium mineral, and the carbon dioxide in flue gas is trapped and fixed,
Realize national emission reduction targets, in package unit, material is transported using pipe chain, is avoided pollution, and design has filtrate cycle pipeline, realization
The recycling of material, it is economic and environment-friendly；The tail gas being discharged from reaction unit can discharge again by vent gas treatment, to environment friend
It is good；The device of a whole set of carbon sequestration assembly line have the characteristics that it is detachable, be easy to transport, convenient for adaptation to local conditions carry out mineral and seal up for safekeeping.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the device of the invention for sealing carbon dioxide in flue gas up for safekeeping using rich magnesium mineral；
Wherein: 1- liquid ammonia vaporization sled；2- flue gas surge tank；3- air-introduced machine；4- blistering reaction kettle；5- concentrated hydrochloric acid storage tank；6-
Flow container is concentrated in rich magnesium mineral；The first centrifuge of 7-；8- delivery pipe chain；The first filtrate tank of 9-；10- magnesium carbonate refining kettle；11- second
Centrifuge；12- recycled offgas cooler；The second filtrate tank of 13-；The first drying machine of 14-；15- ammonium chloride crystals kettle；16- third
Centrifuge；The second drying machine of 17-；18- three-level absorption tower；19- single effect evaporator.
Specific embodiment
The present invention is explained in detail with attached drawing with reference to embodiments.
Embodiment 1
Such as Fig. 1, a kind of device for sealing carbon dioxide in flue gas up for safekeeping using rich magnesium mineral, including rich magnesium mineral concentration flow container 6,
Blistering reaction kettle 4, liquid ammonia vaporization prize 1, magnesium carbonate refining kettle 10, the first filtrate tank 9, the second filtrate tank 13, ammonium chloride crystals kettle
15, concentrated hydrochloric acid storage tank 5, flue gas surge tank 2, recycled offgas cooler 12, three-level absorption tower 18, the centrifugation of the first centrifuge 7, second
Flow container 6 is concentrated in machine 11, third centrifuge 16, the first drying machine 14, the second drying machine 17 and single effect evaporator 19, rich magnesium mineral
Outlet is connected to the entrance of blistering reaction kettle 4, and the outlet of liquid ammonia vaporization sled 1 is connected to the entrance of blistering reaction kettle 4, blistering reaction
The outlet at bottom of kettle 4 is connect with the first centrifuge 7, the liquid outlet of the first centrifuge 7 by the first filtrate tank 9 and pump respectively with
The entrance of blistering reaction kettle 4 is connected to the entrance of ammonium chloride crystals kettle 15；The solid outlet of first centrifuge 7 passes through delivery pipe chain
8 are connected to the entrance of magnesium carbonate refining kettle 10, and the outlet at bottom of magnesium carbonate refining kettle 10 is connect with the second centrifuge 11, second from
The liquid outlet of scheming 11 is connected to by the second filtrate tank 13 and pump with the entrance of magnesium carbonate refining kettle 10, the second centrifuge 11
Solid outlet is connect by delivery pipe chain 8 with the first drying machine 14；The outlet of concentrated hydrochloric acid storage tank 5 enters with ammonium chloride crystals kettle 15
Mouth connection, the outlet of ammonium chloride crystals kettle 15 are connect with third centrifuge 16, the liquid outlet and rich magnesium mine of third centrifuge 16
The entrance connection of flow container 6 is concentrated in object, and the outlet of third centrifuge 16 is connect by delivery pipe chain 8 with the second drying machine 17；It is bubbled
The top exit of reactor 4 is connected to three-level absorption tower 18, the outlet on three-level absorption tower 18 and the entrance of magnesium carbonate refining kettle 10
Connection, another outlet on three-level absorption tower 18 is connected to single effect evaporator 19；The top exit of magnesium carbonate refining kettle 10 passes through pipe
Road and recycled offgas cooler 12 are connected to the entrance of flue gas surge tank 2, and the outlet of flue gas surge tank 2 passes through air-introduced machine 3 and drum
Steep the entrance connection of reaction kettle 4.
First drying machine 14 and the second drying machine 17 are paddle-dryer, and first centrifuge 7, second is centrifuged
Machine 11 and third centrifuge 16 are Horizontal type automatic centrifuge with cutter discharge of solid；The recycled offgas cooler 12 is fixed tube sheet
The heat exchanger tube of formula heat exchanger, the inside is distributed in positive triangle.
Generated rich magnesium mineral in the old halogen pond of saltworks are shone using salt lake to seal up for safekeeping using above-mentioned apparatus two in flue gas as raw material
Carbonoxide, in rich magnesium mineral used, Mg content is greater than 46%, adds water to be prepared into the rich magnesium that concentration is 6mol/L rich magnesium mineral
Mineral concentrate, it is spare；Carbon dioxide in flue gas is sealed up for safekeeping using the device of the present embodiment:
Scheme one:
The method for sealing carbon dioxide in flue gas up for safekeeping using above-mentioned apparatus, includes the following steps:
(1) flow container is concentrated from rich magnesium mineral with 30m in the rich magnesium mineral concentrate of 6mol/L3It is anti-that the flow of/h is pumped into bubbling
Kettle is answered, liquid ammonia vaporization sled is opened, being passed through liquefied ammonia tune pH value of solution is 8；
(2) industrial smoke that carbon dioxide content is 13% is entered into flue gas surge tank by flue, then pass through air-introduced machine with
30m3The flow of/h enters blistering reaction kettle, is reacted at 65 DEG C, obtains slurries and tail gas；
Tail gas from blistering reaction kettle top exit enter three-level absorption tower carry out pickling and alkali cleaning processing, obtain ammonium chloride and
Can direct emission alkali cleaning tail gas (main component N2), 5% alkali cleaning tail gas is sent to magnesium carbonate refining kettle and is utilized, it will
Ammonium chloride forms ammonium chloride product after single effect evaporator is handled；
Slurries in blistering reaction kettle enter the first centrifuge from outlet at bottom and are centrifuged, and obtain magnesium carbonate ammonium water
Close object (measuring Mg content in magnesium carbonate ammonium hydrate is 95%) and filtrate (concentration for measuring magnesium ion in filtrate is 0.4mol/L,
The concentration of ammonium ion is 3.2mol/L)；
(3) filtrate after being centrifugated in the first centrifuge is sent into the first filtrate tank, then passes through pump and pipeline difference
It is sent into blistering reaction kettle and ammonium chloride crystals kettle, wherein the 30wt% for sending the amount of filtrate to ammonium chloride crystals kettle to account for filtrate total amount；
Magnesium carbonate ammonium hydrate after being centrifugated in first centrifuge is delivered to magnesium carbonate purification by delivery pipe chain
Kettle, while the part alkali cleaning tail gas for being passed through water into magnesium carbonate refining kettle and being come out from three-level absorption tower, magnesium carbonate ammonium hydrate
Mass ratio with water is 1:3, is refined to magnesium carbonate ammonium hydrate in refining kettle and (is warming up to 80 DEG C, stir 60min), produced
Raw pulp liquid and recycled offgas；Recycled offgas is returned into flue gas surge tank by recycled offgas cooler, slurries are sent to second
Centrifuge is centrifuged, and obtains light magnesium carbonate crude product (purity of light magnesium carbonate crude product is 99%) and refined soln；Essence
The main component of solution processed is water.
(4) light magnesium carbonate crude product is delivered to the first drying machine by delivery pipe chain and (120 DEG C, 2h) is dried, obtained
To light magnesium carbonate product；Refined soln is stored in the second filtrate tank, then by pump and pipeline send back to magnesium carbonate refining kettle after
It is continuous to participate in reaction；
(5) rich magnesium mineral are sent to the ammonium chloride crystals kettle (matter of rich magnesium mineral and solution in crystallization kettle by delivery pipe chain
Amount ratio is 0.6:1), concentrated hydrochloric acid storage tank is opened, concentrated hydrochloric acid tune pH to 7 is added in ammonium chloride crystals kettle, crystallization kettle is interior by stirring
Mix, crystallize after obtain slurries, slurries are sent to third centrifuge and are centrifuged, ammonium chloride crude product (ammonium chloride crude product is obtained
Purity 98.8%) and rich magnesium solution (magnesium ion concentration 2mol/L) be, to send rich magnesium solution back to rich magnesium mineral concentration flow container,
Ammonium chloride crude product is delivered to the second drying machine by delivery pipe chain, (80 DEG C, 0.5h) are dried, obtains ammonium chloride product.
Carbon dioxide total absorptivity is 93% in the program, and the yield of light magnesium carbonate is 97%.
Scheme two:
The method for sealing carbon dioxide in flue gas up for safekeeping using above-mentioned apparatus, includes the following steps:
(1) flow container is concentrated from rich magnesium mineral with 40m in the rich magnesium mineral concentrate of 6mol/L3It is anti-that the flow of/h is pumped into bubbling
Kettle is answered, liquid ammonia vaporization sled is opened, being passed through liquefied ammonia tune pH value of solution is 8.5；
(2) industrial smoke that carbon dioxide content is 15% is entered into flue gas surge tank by flue, then pass through air-introduced machine with
40m3The flow of/h enters blistering reaction kettle, is reacted at 50 DEG C, obtains slurries and tail gas；
Tail gas from blistering reaction kettle top exit enter three-level absorption tower carry out pickling and alkali cleaning processing, obtain ammonium chloride and
Can direct emission alkali cleaning tail gas (main component N2), 5% alkali cleaning tail gas is sent to magnesium carbonate refining kettle and is utilized, it will
Ammonium chloride forms ammonium chloride product after single effect evaporator is handled；
Slurries in blistering reaction kettle enter the first centrifuge from outlet at bottom and are centrifuged, and obtain magnesium carbonate ammonium water
It closes object (purity 96%) and filtrate (measures the concentration of magnesium ion in filtrate as 0.08mol/L, the concentration of ammonium ion is
3.9mol/L)；
(3) filtrate after being centrifugated in the first centrifuge is sent into the first filtrate tank, then passes through pump and pipeline difference
It is sent into blistering reaction kettle and ammonium chloride crystals kettle, wherein the 20wt% for sending the amount of filtrate to ammonium chloride crystals kettle to account for filtrate total amount；
Magnesium carbonate ammonium hydrate after being centrifugated in first centrifuge is delivered to magnesium carbonate purification by delivery pipe chain
Kettle, while the part alkali cleaning tail gas for being passed through water into magnesium carbonate refining kettle and being come out from three-level absorption tower, magnesium carbonate ammonium hydrate
Mass ratio with water is 1:4, is refined to magnesium carbonate ammonium hydrate in refining kettle and (is warming up to 65 DEG C, stir 80min), produced
Raw pulp liquid and recycled offgas；Recycled offgas is returned into flue gas surge tank by recycled offgas cooler, slurries are sent to second
Centrifuge is centrifuged, and obtains light magnesium carbonate crude product (purity of light magnesium carbonate crude product is 99%) and refined soln；Essence
The main component of solution processed is water.
(4) light magnesium carbonate crude product is delivered to the first drying machine by delivery pipe chain and (150 DEG C, 1h) is dried, obtained
To light magnesium carbonate product；Refined soln is stored in the second filtrate tank, then by pump and pipeline send back to magnesium carbonate refining kettle after
It is continuous to participate in reaction；
(5) rich magnesium mineral are sent to the ammonium chloride crystals kettle (matter of rich magnesium mineral and solution in crystallization kettle by delivery pipe chain
Amount ratio is 0.9:1), concentrated hydrochloric acid storage tank is opened, concentrated hydrochloric acid tune pH to 6 is added in ammonium chloride crystals kettle, crystallization kettle is interior by stirring
Mix, crystallize after obtain slurries, slurries are sent to third centrifuge and are centrifuged, ammonium chloride crude product (ammonium chloride crude product is obtained
Purity 99%) and rich magnesium solution (magnesium ion concentration 1.8mol/L) be, to send rich magnesium solution back to rich magnesium mineral concentration flow container,
Ammonium chloride crude product is delivered to the second drying machine by delivery pipe chain, (100 DEG C, 0.5h) are dried, obtains ammonium chloride product.
Carbon dioxide total absorptivity in this programme is 92%, and the yield of light magnesium carbonate is 98%.
Scheme three:
The method for sealing carbon dioxide in flue gas up for safekeeping using above-mentioned apparatus, includes the following steps:
(1) flow container is concentrated from rich magnesium mineral with 30m in the rich magnesium mineral concentrate of 6mol/L3It is anti-that the flow of/h is pumped into bubbling
Kettle is answered, liquid ammonia vaporization sled is opened, being passed through liquefied ammonia tune pH value of solution is 9.2；
(2) industrial smoke that carbon dioxide content is 13% is entered into flue gas surge tank by flue, then pass through air-introduced machine with
20m3The flow of/h enters blistering reaction kettle, is reacted at 80 DEG C, obtains slurries and tail gas；
Tail gas from blistering reaction kettle top exit enter three-level absorption tower carry out pickling and alkali cleaning processing, obtain ammonium chloride and
Can direct emission alkali cleaning tail gas (main component N2), 5% alkali cleaning tail gas is sent to magnesium carbonate refining kettle and is utilized, it will
Ammonium chloride forms ammonium chloride product after single effect evaporator is handled；
Slurries in blistering reaction kettle enter the first centrifuge from outlet at bottom and are centrifuged, and obtain magnesium carbonate ammonium water
It closes object (purity 95%) and filtrate (measures the concentration of magnesium ion in filtrate as 0.3mol/L, the concentration of ammonium ion is
3.8mol/L)；
(3) filtrate after being centrifugated in the first centrifuge is sent into the first filtrate tank, then passes through pump and pipeline difference
It is sent into blistering reaction kettle and ammonium chloride crystals kettle, wherein the 30wt% for sending the amount of filtrate to ammonium chloride crystals kettle to account for filtrate total amount；
Magnesium carbonate ammonium hydrate after being centrifugated in first centrifuge is delivered to magnesium carbonate purification by delivery pipe chain
Kettle, while the part alkali cleaning tail gas for being passed through water into magnesium carbonate refining kettle and being come out from three-level absorption tower, magnesium carbonate ammonium hydrate
Mass ratio with water is 1:5, is refined to magnesium carbonate ammonium hydrate in refining kettle and (is warming up to 85 DEG C, stir 30min), produced
Raw pulp liquid and recycled offgas；Recycled offgas is returned into flue gas surge tank by recycled offgas cooler, slurries are sent to second
Centrifuge is centrifuged, and obtains light magnesium carbonate crude product (purity of light magnesium carbonate crude product is 99%) and refined soln；Essence
The main component of solution processed is water.
(4) light magnesium carbonate crude product is delivered to the first drying machine by delivery pipe chain and (120 DEG C, 1h) is dried, obtained
To light magnesium carbonate product；Refined soln is stored in the second filtrate tank, then by pump and pipeline send back to magnesium carbonate refining kettle after
It is continuous to participate in reaction；
(5) rich magnesium mineral are sent to the ammonium chloride crystals kettle (matter of rich magnesium mineral and solution in crystallization kettle by delivery pipe chain
Amount is than being 1:1), open concentrated hydrochloric acid storage tank, toward being added concentrated hydrochloric acid tune pH to 5 in ammonium chloride crystals kettle, in crystallization kettle by stirring,
Obtain slurries after crystallization, slurries sent to third centrifuge and are centrifuged, obtain ammonium chloride crude product (ammonium chloride crude product it is pure
Degree is 98%) rich magnesium solution to be sent back to rich magnesium mineral concentration flow container, by chlorine with rich magnesium solution (magnesium ion concentration 1.7mol/L)
Change ammonium crude product is delivered to the second drying machine by delivery pipe chain and (80 DEG C, 1h) is dried, and obtains ammonium chloride product.
The carbon dioxide total absorptivity of this programme is 90%, and the yield of light magnesium carbonate is 99%.
Claims (4)
1. a kind of device for sealing carbon dioxide in flue gas up for safekeeping using rich magnesium mineral, which is characterized in that including rich magnesium mineral concentrate
Tank (6), blistering reaction kettle (4), liquid ammonia vaporization prize (1), magnesium carbonate refining kettle (10), the first filtrate tank (9), the second filtrate tank
(13), ammonium chloride crystals kettle (15), concentrated hydrochloric acid storage tank (5), flue gas surge tank (2), recycled offgas cooler (12), three-level absorb
Tower (18), the first centrifuge (7), the second centrifuge (11), third centrifuge (16), the first drying machine (14), the second drying machine
(17) and single effect evaporator (19)；
Rich magnesium mineral concentration flow container (6) outlet be connected to the entrance of blistering reaction kettle (4), liquid ammonia vaporization sled (1) outlet and
The entrance of blistering reaction kettle (4) is connected to, and the outlet at bottom of blistering reaction kettle (4) is connect with the first centrifuge (7), the first centrifuge
(7) liquid outlet by the first filtrate tank (9) and pump respectively with the entrance of blistering reaction kettle (4) and ammonium chloride crystals kettle (15)
Entrance connection；The solid outlet of first centrifuge (7) is connected by the entrance of delivery pipe chain (8) and magnesium carbonate refining kettle (10)
Logical, the outlet at bottom of magnesium carbonate refining kettle (10) is connect with the second centrifuge (11), and the liquid outlet of the second centrifuge (11) is logical
It crosses the second filtrate tank (13) and pump is connected to the entrance of magnesium carbonate refining kettle (10), the solid outlet of the second centrifuge (11) passes through
Delivery pipe chain (8) is connect with the first drying machine (14)；
The outlet of concentrated hydrochloric acid storage tank (5) is connected to the entrance of ammonium chloride crystals kettle (15), the outlet of ammonium chloride crystals kettle (15) with
The liquid outlet of third centrifuge (16) connection, third centrifuge (16) is connected to the entrance of rich magnesium mineral concentration flow container (6), the
The outlet of three centrifuges (16) is connect by delivery pipe chain (8) with the second drying machine (17)；
The top exit of blistering reaction kettle (4) is connected to three-level absorption tower (18), the outlet of three-level absorption tower (18) and magnesium carbonate
The entrance of refining kettle (10) is connected to, and another outlet of three-level absorption tower (18) is connected to single effect evaporator (19)；
The top exit of magnesium carbonate refining kettle (10) is entered by pipeline and recycled offgas cooler (12) and flue gas surge tank (2)
The outlet of mouth connection, flue gas surge tank (2) is connected to by air-introduced machine (3) with the entrance of blistering reaction kettle (4).
2. device as described in claim 1, which is characterized in that first drying machine and the second drying machine are Paddle Drying
Machine.
3. device as described in claim 1, which is characterized in that first centrifuge, the second centrifuge and third centrifuge
It is Horizontal type automatic centrifuge with cutter discharge of solid.
4. the device as described in claims 1 or 2 or 3, which is characterized in that the recycled offgas cooler changes for fixed tube sheet type
The heat exchanger tube of hot device, the inside is distributed in positive triangle.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109364715A (en) * | 2018-11-28 | 2019-02-22 | 南京浦世环境科技发展有限公司 | A kind of device and method for sealing carbon dioxide in flue gas up for safekeeping using rich magnesium mineral |
| CN114100362A (en) * | 2021-11-22 | 2022-03-01 | 南京大学 | Method for sequestering carbon dioxide by using alkalophilic algae |
| CN115228278A (en) * | 2022-07-19 | 2022-10-25 | 天津中材工程研究中心有限公司 | PH value regulation and control calcium carbonate for accelerating mineralization and absorption of CO in flue gas 2 System and method |
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2018
- 2018-11-28 CN CN201821976037.8U patent/CN209188467U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109364715A (en) * | 2018-11-28 | 2019-02-22 | 南京浦世环境科技发展有限公司 | A kind of device and method for sealing carbon dioxide in flue gas up for safekeeping using rich magnesium mineral |
| CN114100362A (en) * | 2021-11-22 | 2022-03-01 | 南京大学 | Method for sequestering carbon dioxide by using alkalophilic algae |
| CN115228278A (en) * | 2022-07-19 | 2022-10-25 | 天津中材工程研究中心有限公司 | PH value regulation and control calcium carbonate for accelerating mineralization and absorption of CO in flue gas 2 System and method |
| CN115228278B (en) * | 2022-07-19 | 2024-04-30 | 天津中材工程研究中心有限公司 | PH value regulated calcium carbonate for accelerating mineralization and absorption of CO in flue gas2Systems and methods of (1) |
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