CN115722053A - Dispose solid useless CO in coordination of multisource 2 Trapping system and method - Google Patents
Dispose solid useless CO in coordination of multisource 2 Trapping system and method Download PDFInfo
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- 238000003860 storage Methods 0.000 claims abstract description 67
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 45
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Abstract
The invention discloses a synergistic CO for treating multi-source solid waste 2 The system and the method for trapping comprise a carbon-rich flue gas inlet, a hearth, a water-sealed slag hopper, a slag slurry storage tank, a slag slurry circulating pipeline and a slag conveyor; the bottom outlet of the hearth is communicated with the top inlet of the water-sealed slag hopper, the bottom outlet of the water-sealed slag hopper is communicated with the top inlet of the slag slurry storage tank, a stirring device is arranged in the slag slurry storage tank, the top of the slag slurry storage tank is provided with a gas outlet, the bottom outlet of the slag slurry storage tank is communicated with the inlet of the slag conveyor, the circulating slag slurry outlet on the side surface of the bottom of the slag slurry storage tank is communicated with the circulating slag slurry inlet on the top of the slag slurry storage tank through a slag slurry circulating pipeline, the carbon-rich flue gas inlet is communicated with a gas diffusion pipe in the slag slurry circulating pipeline, the gas diffusion pipe is uniformly provided with a plurality of through holes, and the CO of the system and the method are realized 2 The absorption rate and the conversion rate are high, and the treatment cost is low.
Description
Technical Field
The invention belongs to the field of multi-source solid waste disposal and carbon dioxide emission reduction, and relates to CO-treatment of multi-source solid waste 2 Systems and methods of trapping.
Background
With the increasing global warming, the climate change such as extreme weather has seriously threatened the global environment on which human beings live. According to the United nations Committee for climate Change (IPCC) report, CO 2 The resulting greenhouse effect accounts for 60% of global greenhouse gases, which leads to a reduction in CO 2 Emissions become an important means to cope with climate warming. CO of thermal power station in China 2 The emission accounts for 40-50% of the total national emission, and is CO in China 2 The largest single source of emission is also the large-scale emission reduction of CO 2 The most interesting field.
At present, the mainstream of CO in thermal power plants 2 The emission reduction route takes the form of a Combination of Capture and Sequestration (CCS). However, due to CO in the tail gas of coal-fired power plants 2 The content is low (10-20%), and the system components are complex, so that the separation equipment system after absorption and trapping is huge, the energy consumption is high, and the emission reduction cost is high. At the same time, CO 2 Has very limited consumption in industrial application, and captures the purified CO along with the popularization and application of the CCS technology 2 The supply will be far from the supermarket needs.
In recent years, CO was first introduced by Seifritz, switzerland scientist in 1990 2 The curing and sealing technique (Nature, 1990,345 (6275), 486-486) has become a hotspot of research. The reaction simulates the weathering process of the nature, is thermodynamically favorable, and can directly utilize low-concentration CO 2 . The technique is through CO 2 Reacting with alkaline earth metal salt such as calcium and magnesium in ore or industrial waste to obtain CO 2 Conversion to stable carbonate product for permanent storage and CO reduction 2 The emission reduction cost. Meanwhile, under the background that China promotes multi-source solid waste disposal, the technology can effectively utilize ash after incineration disposal of combustible solid waste such as fiber, rubber, resin and the likeSlag and a large amount of industrial solid waste ash slag generated in the processes of burning coal, steelmaking, smelting ore and the like are used as solidification raw materials, so that the win-win situation of carbon emission reduction and solid waste resource utilization is realized.
Currently, CO is carried out using multi-source solid waste 2 In the technical scheme and the system of solidification, solid waste is used as mixed aggregate in the construction industry in a large number of technical schemes: such as CN201210077244, CN201510377931, CN202010563290, CN202111561220, etc.; by CO 2 Although the curing molded blank building block can realize carbon fixation and improve the material strength, the curing and carbon fixation time is long, the curing time of part of schemes is as long as several days (CN 201510377931, CN 202011161585), continuous reaction cannot be realized, and the curing molded blank building block is difficult to adapt to CO of a flue gas source 2 And (5) curing. To increase CO 2 In some technical schemes, an ammonia medium reinforced curing system is adopted, and CO can be improved by adding amine components (CN 201310057123 and CN 202010023389) or aminated absorbing materials (CN 201710114152 and CN 202210338660) into the absorbing liquid 2 The absorption rate and the conversion rate but need a regeneration process with high energy consumption or consume a large amount of ammonia media, so that the carbon emission reduction cost is improved, and the method is not different from a carbon capture route. Other solutions have been proposed for CO 2 Curing reactors and methods, these schemes include complex equipment systems and high reaction temperatures (CN 201810948855), high pressures (CN 201510217795, CN 202111543451) are difficult to apply to large scale CO 2 A source of emissions.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for treating multi-source solid waste synergistic CO 2 System and method for capture, and CO for the system and method 2 The absorption rate and the conversion rate are high, and the treatment cost is low.
In order to achieve the aim, the invention relates to CO synergistic with multi-source solid waste disposal 2 The trapping system comprises a carbon-rich flue gas inlet, a hearth, a water seal slag hopper, a slag slurry storage tank, a slag slurry circulating pipeline and a slag dragging machine;
the bottom export of furnace is linked together with the top entry of water seal sediment fill, the bottom export of water seal sediment fill is linked together with the top entry of sediment thick liquid storage tank, be provided with agitating unit in the sediment thick liquid storage tank, the top of sediment thick liquid storage tank is provided with the gas outlet, the bottom export of sediment thick liquid storage tank is linked together with the entry of dragveyer, the circulation sediment thick liquid export of sediment thick liquid storage tank bottom side is linked together through the circulation sediment thick liquid entry at sediment thick liquid circulating line with sediment thick liquid storage tank top, carbon-rich flue gas entry is linked together with the gas diffusion pipe among the sediment thick liquid circulating line, the gas diffusion pipe evenly is provided with a plurality of through-holes.
The top of the slurry storage tank is provided with a safety valve.
The circulating slag slurry outlet on the side surface of the bottom of the slag slurry storage tank is communicated with the circulating slag slurry inlet on the top of the slag slurry storage tank through a slag slurry circulating pump and a slag slurry circulating pipeline.
The bottom of the slag dragging machine is provided with a slag water outlet and an overflow water outlet.
The slag extractor also comprises a slag bin, wherein a slag outlet of the slag extractor is communicated with the slag bin.
The slag outlet of the slag conveyor is communicated with the slag bin through the lifting section of the slag conveyor.
And a deslagging gate is arranged at the outlet of the bottom of the water seal slag hopper.
And a slag slurry gate is arranged at the outlet at the bottom of the slag slurry storage tank.
The invention relates to CO-synergy of treating multi-source solid waste 2 The method of trapping comprises the steps of:
1) The ash slag in the hearth is introduced into a water-sealed slag hopper, the coke block is cracked and cooled, and after a preset time, the slag slurry in the water-sealed slag hopper is discharged into a slag slurry storage tank;
2) In a slag slurry storage tank, under the action of a stirring device, effective carbon fixing components in ash slag are dissolved or dispersed into slurry water;
simultaneously, the slag slurry in the slag slurry storage tank enters a slag slurry circulating pipeline, and the slag slurry in the slag slurry circulating pipeline reacts with the carbon-rich flue gas introduced from the carbon-rich flue gas inlet and then returns to the slag slurry storage tank again, wherein the carbon-rich flue gas enters a gas diffusion pipe in the slag slurry circulating pipeline, micro bubbles are formed in the whole length range of the gas diffusion pipe, and are mixed with the slag slurry to be in contact with the gas diffusion pipe for solidification reaction, so that carbonate precipitation is formed, decarburization is realized, and the decarburized flue gas is discharged from a gas outlet;
3) Discharging the slurry in the slurry storage tank into a slag conveyor, and fishing out the wet slag after carbon sequestration through the slag conveyor.
The ash slag is the ash slag after the combustible solid waste is incinerated or the ash slag of industrial solid waste.
The invention has the following beneficial effects:
the invention relates to CO-synergy of treating multi-source solid waste 2 During the specific operation of the trapping system and the trapping method, the slag slurry in the slag slurry storage tank enters the slag slurry circulating pipeline, and in the slag slurry circulating pipeline, the slag slurry returns to the slag slurry storage tank again after reacting with the carbon-rich flue gas introduced from the carbon-rich flue gas inlet, wherein the carbon-rich flue gas is mixed with the slag slurry to perform a curing reaction to form carbonate precipitate, so that decarburization is realized, and the CO content is improved 2 The absorption rate and the conversion rate are high, and meanwhile, in practical application, the original slag-slurry mixing system, the subsequent slag dragging system and the slag water treatment system are used, so that the repeated treatment steps in the process of utilizing solid waste and solid carbon are avoided, the equipment system is simplified, and the treatment cost is low.
Drawings
FIG. 1 is a block diagram of the present invention;
fig. 2 is a view showing the position of the gas diffusion tube 5b in the present invention.
The device comprises a hearth 1, a water seal slag hopper 2, a slag slurry storage tank 3, a slag slurry circulating pump 4, a slag slurry circulating pipeline 5, a slag salvaging machine 6, a slag discharging gate 2a, a stirring device 3a, a gas outlet 3b, a safety valve 3c, a slag slurry gate 3d, a circulating slag slurry outlet 3e, a circulating slag slurry inlet 3f, a carbon-rich flue gas inlet 5a, a gas diffusion pipe 5b, a slag salvaging machine lifting section 6a, a slag bin 6b and a slag water and overflow water outlet 6 c.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and do not limit the scope of the disclosure of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
There is shown in the drawings a schematic block diagram of a disclosed embodiment in accordance with the invention. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
Example one
Referring to fig. 1 and 2, the invention relates to the disposal of multi-source solid waste synergistic CO 2 The trapping system comprises a hearth 1, a water-sealed slag hopper 2, a slag slurry storage tank 3, a slag slurry circulating pump 4, a slag slurry circulating pipeline 5 and a slag dragging machine 6;
the bottom outlet of the hearth 1 is communicated with the top inlet of a water-sealed slag hopper 2, the bottom outlet of the water-sealed slag hopper 2 is communicated with the top inlet of a slag slurry storage tank 3, a slag discharge gate 2a is arranged at the bottom outlet of the water-sealed slag hopper 2, a stirring device 3a is arranged in the slag slurry storage tank 3, a safety valve 3c and a gas outlet 3b are arranged at the top of the slag slurry storage tank 3, the bottom outlet of the slag slurry storage tank 3 is communicated with the inlet of a slag dragger 6, a slag slurry gate 3d is arranged at the bottom outlet of the slag slurry storage tank 3, a circulating slag slurry outlet 3e at the bottom side surface of the slag slurry storage tank 3 is communicated with a circulating slag slurry inlet 3f at the top of the slag slurry storage tank 3 through a slag slurry circulating pump 4 and a slag slurry circulating pipeline 5, a carbon-rich flue gas inlet 5a is communicated with a gas diffusion pipe 5b in the slag slurry circulating pipeline 5, a plurality of through holes are uniformly arranged on the gas diffusion pipe 5b, a slag water outlet 6c and an overflow water outlet 6c of the slag dragger 6 are communicated with a slag dragger 6b through a lifting section.
According to the inventionTo deal with multiple sources solid waste is cooperated with CO 2 The method of trapping comprises the steps of:
1) Ash residues in the hearth 1 are introduced into a water-sealed slag hopper 2, coke blocks are cracked and cooled, and after a preset time, a slag discharging gate 2a is opened to discharge slag slurry stored in the water-sealed slag hopper 2 into a slag slurry storage tank 3;
2) In the slag slurry storage tank 3, under the stirring device 3a, effective carbon fixing components in the ash slag are dissolved or dispersed into slurry water;
meanwhile, the slag slurry in the slag slurry storage tank 3 enters the slag slurry circulating pipeline 5 under the action of the slag slurry circulating pump 4, and returns to the slag slurry storage tank 3 again after reacting with the carbon-rich flue gas in the slag slurry circulating pipeline 5, wherein the carbon-rich flue gas enters the gas diffusion pipe 5b in the slag slurry circulating pipeline 5, micro bubbles are formed in the whole length range of the gas diffusion pipe 5b, and are mixed and contacted with the slag slurry to carry out a curing reaction to form carbonate precipitation and realize decarburization, and the decarburized flue gas is discharged from the gas outlet 3 b;
3) Opening a slurry gate 3d, and discharging the slurry in the slurry storage tank 3 to a slag dragging machine 6;
4) And the slag dragging machine 6 drags out the wet slag after carbon sequestration, and conveys the wet slag to the slag bin 6b for storage, and simultaneously conveys the residual slag water and the overflow water into a subsequent slag water treatment system for treatment and recycling.
The ash slag is the ash slag after the burning treatment of combustible solid wastes such as fiber, rubber, resin and the like, and also can be the bulk industrial solid waste ash slag generated in the processes of burning coal, steelmaking, smelting ore and the like.
The deslagging period of the water seal slag hopper 2 is 3-9h.
The water quantity in the water-sealed slag hopper 2 is controlled to keep the cooling water temperature at 40-80 ℃, namely the temperature of the slag slurry is 40-80 ℃.
The ratio of the volume flow rates of the circulating slag slurry in the slag slurry storage tank 3 and the carbon-rich flue gas is (3-9): (1-2).
Example two
This embodiment uses the system described in the first embodiment. High-temperature ash A at about 800 ℃ in a hearth 1 falls into a water-sealed slag hopper 2, the composition of the ash A is shown in table 1, and a coke block is cracked and cooled to 65 ℃. After 8 hours of storage, the slag discharge gate 2a is opened, and the stored slag slurry is discharged into the slag slurry storage tank 3.
TABLE 1
| Composition (I) | SiO 2 | Al 2 O 3 | Fe 2 O 3 | CaO | MgO | Na 2 O | K 2 O | SO 3 |
| Mass fraction% | 12.1 | 4.7 | 16.5 | 57.4 | 4.2 | 0.33 | 0.36 | 1.8 |
Slurry in slurry storageStirring and mixing evenly in the tank 3, and dissolving or dispersing effective carbon fixing components such as calcium, magnesium and the like in the ash slag into the slurry. The slag slurry in the slag slurry storage tank 3 is circulated by the slag slurry circulating pump 4 at 8000m 3 The flow rate of the flow/h enters a slag slurry circulating pipeline 5. Contains 20% of CO 2 The carbon-rich flue gas has the particle size of 1800m 3 The flow velocity of the/h enters the gas diffusion pipe 5b in the slurry circulating pipeline 5, micro bubbles are formed in the whole length range of the gas diffusion pipe 5b, and the micro bubbles are mixed with the slurry to be in contact with the slurry to generate a curing reaction, so that carbonate sediment is formed. The reacted slag slurry returns to the slag slurry storage tank 3 again, the decarbonized flue gas is discharged from the gas outlet 3b, the slag slurry gate 3d is opened before the water seal slag hopper 2 discharges the slag next time, the slag slurry in the slag slurry storage tank 3 is discharged, the wet slag after carbon fixation is fished up by the slag scooper 6 and is conveyed to the slag bin 6b for storage, and the residual slag water and the overflow water are recycled after being treated by a subsequent slag water treatment system.
Under the condition, after the circulating reaction is carried out for 6 hours, the pH value of the slag water is reduced from 11.7 to 8.5, the ash residue A is taken out and dried, the content of carbonate is detected, and the carbon fixation rate (weight gain after the reaction) is up to 23 percent compared with the original ash residue. The carbon dioxide concentration of the decarbonized flue gas at the gas outlet 3b was measured every one hour, and as a result, as shown in table 2, although the decarbonization effect of the slurry decreased as the reaction time increased, the reaction time decreased to lower the utilization rate of the carbon-fixed component in the ash, and therefore, it was necessary to design the reaction time in accordance with the slag hopper discharge frequency to make full use of the carbon-fixed component in the ash.
TABLE 2
| Reaction time length/ |
1 | 2 | 3 | 4 | 5 | 6 |
| Decarbonized flue gas CO 2 Concentration/%) | 0.8 | 1.0 | 1.45 | 3.2 | 3.8 | 4.8 |
EXAMPLE III
As described in example two, the ash is cooled to 50 ℃ in the water-sealed slag hopper 2 under the other conditions, namely, the slag slurry is circulated at 50 ℃ for carbon fixation.
Under these conditions, the slag water pH dropped from 11.5 to 8.7 after 6 hours of cycling reaction. And (3) taking out the ash residue A, drying, detecting the content of carbonate, and comparing with the original ash residue to obtain the carbon fixation rate of 26%. The carbon dioxide concentration of the decarbonized flue gas at the gas outlet 3b was measured every one hour, and as a result, as shown in table 3, it can be understood from table 3 that the lowering of the temperature of the slurry slightly lowers the initial decarbonization efficiency, but the higher decarbonization efficiency can be maintained at the later stage of the decarbonization cycle of 6 hours.
TABLE 3
| Reaction time length/ |
1 | 2 | 3 | 4 | 5 | 6 |
| Decarbonized flue gas CO 2 Concentration/%) | 1.4 | 2.2 | 2.1 | 2.0 | 2.4 | 1.9 |
Example four
As described in example two, other conditions are unchanged, and the slurry in the slurry storage tank 3 is at 4000m under the action of the slurry circulating pump 4 3 The flow rate of the flow/h enters a slag slurry circulating pipeline 5.
Under the condition, after the circulating reaction is carried out for 6 hours, the pH value of the slag water is reduced from 11.7 to 8.8, the ash residue A is taken out and dried, the carbonate content is detected, and the carbon fixation rate is up to 25 percent compared with the original ash residue. The circulating reaction is carried out for 6 hours, and the carbon dioxide concentration of the decarbonized flue gas at the gas outlet 3b is 8.7 percent.
EXAMPLE five
As described in example two, the slurry in the slurry storage tank 3 is 12000m under the action of the slurry circulating pump 4 under the condition that other conditions are not changed 3 The flow rate of the flow/h enters a slag slurry circulating pipeline 5.
Under the condition, after the cyclic reaction is carried out for 6 hours, the pH value of the slag water is reduced to 9.2 from 11.7, the ash A is taken out and dried, the content of carbonate is detected, the carbon fixation rate is up to 16 percent by comparing with the original ash, the cyclic reaction is carried out for 6 hours, and the carbon dioxide concentration of the decarbonized flue gas at the gas outlet 3b is 3.5 percent.
EXAMPLE six
As described in example two, the high temperature ash B was dropped from the furnace 1 under otherwise unchanged conditions, and the composition of the ash B is shown in Table 4.
TABLE 4
| Composition (I) | SiO 2 | Al 2 O 3 | Fe 2 O 3 | CaO | MgO | Na 2 O | K 2 O | SO 3 |
| Mass fraction% | 40.1 | 8.3 | 1.0 | 43.6 | 5.2 | 0.55 | 0.60 | 0.23 |
Under the condition, after the circulating reaction is carried out for 6 hours, the pH value of the slag water is reduced from 11.2 to 8.7, the ash residue A is taken out and dried, the carbonate content is detected, and the carbon fixation rate is up to 18 percent compared with the original ash residue. The circular reaction is carried out for 6 hours, and the carbon dioxide concentration of the decarbonized flue gas at the gas outlet 3b is 6.7 percent.
EXAMPLE seven
As described in example two, the high temperature ash C was dropped from the furnace 1 under otherwise unchanged conditions, and the composition of the ash C was as shown in Table 5.
TABLE 5
| Composition (I) | SiO 2 | Al 2 O 3 | Fe 2 O 3 | CaO | MgO | Na 2 O | K 2 O | SO 3 |
| Mass fraction% | 35.4 | 11.7 | 9.6 | 28.9 | 2.1 | 0.88 | 1.1 | 6.5 |
Under the condition, after the circulating reaction is carried out for 6 hours, the pH value of slag water is reduced from 10.5 to 8.6, the ash residue A is taken out and dried, the content of carbonate is detected, and the carbon fixation rate is 15 percent compared with the original ash residue. The circulating reaction is carried out for 6 hours, and the carbon dioxide concentration of the decarbonized flue gas at the gas outlet 3b is 9.8 percent.
The invention has the following characteristics:
the equipment system is simple: the invention adds CO on the basis of a wet slag removal system 2 The absorption unit is used for carbon fixation in a synergic mode, an original slag and slurry mixing system is effectively utilized, a subsequent slag fishing system and a slag water treatment system are utilized, repeated treatment steps during utilization of solid waste carbon fixation are avoided, and an equipment system is simplified.
Co-processing multi-source solid waste: the invention is suitable for various occasions involving solid wastes, can utilize ash residues after incineration disposal of combustible solid wastes such as fibers, rubber, resin and the like, and also can utilize bulk industrial solid waste ash residues generated in the processes of coal burning, steel making, ore smelting and the like as carbon-fixing raw materials, has wide application scenes and high applicability, and the treated solid wastes can be used as aggregate for resource utilization.
And (3) waste heat utilization: the high-temperature slag falls into the water-sealed slag hopper 2 for cooling and cracking, and the high-temperature slag at about 800 ℃ transfers heat to cooling water; the invention introduces carbon-rich flue gas into a mixed system of slag and cooling water for CO treatment 2 The solidification reaction can effectively utilize the residual heat of the slag and promote the generation of the solidification reaction.
Optimizing a wet slag removal system: the wet slag removal system adopts a closed circulating water system, slag water is conveyed into the slag removal system for recycling after being subjected to precipitation treatment,the circulating water is alkaline and easy to scale; the invention adds the slag slurry storage tank 3 into the system to carry out carbon fixation reaction, and alkaline ions (Ca) in the system are added 2+ 、Mg 2+ ) And the precipitate is converted into carbonate precipitate, is fished up with ash slag and is discharged or is removed by filtration, so that the pH value of circulating water is effectively reduced, and scaling is slowed down.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. Dispose solid useless CO in coordination of multisource 2 The system for trapping is characterized by comprising a carbon-rich flue gas inlet (5 a), a hearth (1), a water-sealed slag hopper (2), a slag slurry storage tank (3), a slag slurry circulating pipeline (5) and a slag conveyor (6);
the bottom outlet of the hearth (1) is communicated with the top inlet of the water-sealed slag hopper (2), the bottom outlet of the water-sealed slag hopper (2) is communicated with the top inlet of the slag slurry storage tank (3), a stirring device (3 a) is arranged in the slag slurry storage tank (3), a gas outlet (3 b) is arranged at the top of the slag slurry storage tank (3), the bottom outlet of the slag slurry storage tank (3) is communicated with the inlet of the slag dragger (6), the circulating slag slurry outlet (3 e) at the bottom side of the slag slurry storage tank (3) is communicated with the circulating slag slurry inlet (3 f) at the top of the slag slurry storage tank (3) through the slag slurry circulating pipeline (5), the carbon-rich flue gas inlet (5 a) is communicated with the gas diffusion pipe (5 b) in the slag slurry circulating pipeline (5), and the gas diffusion pipe (5 b) is uniformly provided with a plurality of through holes.
2. The handling multi-source solid waste synergistic CO of claim 1 2 The trapping system is characterized in that a safety valve (3 c) is arranged at the top of the slag slurry storage tank (3).
3. The handling multi-source solid waste synergistic CO of claim 1 2 TrappingThe system is characterized in that a circulating slag slurry outlet (3 e) on the side surface of the bottom of the slag slurry storage tank (3) is communicated with a circulating slag slurry inlet (3 f) on the top of the slag slurry storage tank (3) through a slag slurry circulating pump (4) and a slag slurry circulating pipeline (5).
4. The handling multi-source solid waste synergistic CO of claim 1 2 The trapping system is characterized in that the bottom of the slag dragging machine (6) is provided with slag water and overflow water outlets (6 c).
5. The handling multi-source solid waste synergistic CO of claim 1 2 The trapping system is characterized by further comprising a slag bin (6 b), wherein the slag outlet of the slag dragging machine (6) is communicated with the slag bin (6 b).
6. The handling of multi-sourced solid waste synergistic CO of claim 5 2 The trapping system is characterized in that a slag outlet of the slag conveyor (6) is communicated with a slag bin (6 b) through a lifting section (6 a) of the slag conveyor.
7. The handling multi-source solid waste synergistic CO of claim 1 2 The trapping system is characterized in that a slag discharge gate (2 a) is arranged at the bottom outlet of the water-sealed slag hopper (2).
8. The handling multi-source solid waste synergistic CO of claim 1 2 The trapping system is characterized in that a slag slurry gate (3 d) is arranged at the bottom outlet of the slag slurry storage tank (3).
9. Dispose solid useless CO in coordination of multisource 2 A capture method, characterized in that the method is based on the method of claim 1 for disposing multi-source solid waste and CO 2 A system for trapping comprising the steps of:
1) ash slag in the hearth (1) is introduced into a water-sealed slag hopper (2), the coke block is cracked and cooled, and after a preset time, slag slurry in the water-sealed slag hopper (2) is discharged into a slag slurry storage tank (3);
2) In the slag slurry storage tank (3), under the action of the stirring device (3 a), effective carbon-fixing components in the ash slag are dissolved or dispersed into the slurry water;
meanwhile, the slag slurry in the slag slurry storage tank (3) enters a slag slurry circulating pipeline (5), and in the slag slurry circulating pipeline (5), the carbon-rich flue gas which is introduced from a carbon-rich flue gas inlet (5 a) acts and then returns to the slag slurry storage tank (3), wherein the carbon-rich flue gas enters a gas diffusion pipe (5 b) in the slag slurry circulating pipeline (5), micro bubbles are formed in the whole length range of the gas diffusion pipe (5 b), and are mixed and contacted with the slag slurry to carry out a curing reaction to form carbonate precipitation and realize decarburization, and the decarburized flue gas is discharged from a gas outlet (3 b);
3) Discharging the slurry in the slurry storage tank (3) into a slag conveyor (6), and fishing out the wet slag after carbon sequestration through the slag conveyor (6).
10. The handling of multi-source solid waste synergistic CO of claim 9 2 The method for trapping is characterized in that the ash slag is the ash slag after the combustible solid waste is incinerated or the ash slag of industrial solid waste.
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