CN216880970U - Gasification slag extraction and recycling system - Google Patents
Gasification slag extraction and recycling system Download PDFInfo
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- CN216880970U CN216880970U CN202220121162.0U CN202220121162U CN216880970U CN 216880970 U CN216880970 U CN 216880970U CN 202220121162 U CN202220121162 U CN 202220121162U CN 216880970 U CN216880970 U CN 216880970U
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- 238000002309 gasification Methods 0.000 title claims abstract description 53
- 238000004064 recycling Methods 0.000 title claims abstract description 23
- 238000000605 extraction Methods 0.000 title claims abstract description 22
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- 239000012141 concentrate Substances 0.000 claims abstract description 61
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 52
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
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Abstract
The utility model provides a gasification slag extraction and recycling system, aiming at solving the problems that the existing gasification slag treatment process is complex, the recovery rate is low, the cost is high, the ideal utilization value cannot be achieved, and the comprehensive utilization efficiency of gasification slag cannot be effectively improved. The system comprises a clean water tank, a gasified slag stirring tank, a first vibrating screen, a first sorting unit, a second sorting unit and a second filter press; the discharge hole of the gasification slag stirring tank is connected with the feed inlet of the first vibrating screen; the screen lower discharge port of the first vibrating screen is connected with the feed port of the first sorting unit; the rough concentrate discharge hole of the first separator set is connected with the feed inlet of the second separator set; and a concentrate discharge hole of the second separator set is connected with a second filter press. The system is used for separating and extracting glass crystals, coarse tailing particles, high ash, fine tailing, fixed carbon, high-heat-quality electric coal and clean coal products from gasification slag, and the products can be directly sold or recycled through a recycling production line.
Description
Technical Field
The utility model relates to a coal chemical industry gasification slag comprehensive utilization technology, in particular to a gasification slag extraction and recycling system.
Background
With the change of climate, environmental pollution is treated globally, wherein a coal gasification technology is one of the core contents of a clean coal technology, but advantages and disadvantages are associated with each other, a large amount of solid waste is produced during production of coal chemical enterprises, and China also treats a large amount of solid waste as an important hand grip for achieving the goals of carbon peak reaching and carbon neutralization.
With the scale of resource exploitation, the wide increase of coal chemical industry enterprises, and the production of the coal chemical industry enterprises generate a large amount of solid wastes, including a large amount of gasified slag, fly ash, furnace slag and desulfurized gypsum, generally, the coal chemical industry enterprises bury the solid wastes in self-contained or fixed-point landfill sites of governments, and the solid wastes flow when meeting water and rise when meeting wind, thereby causing ecological environment pollution. Although solid waste constitutes a considerable environmental hazard, if it can be properly and reasonably utilized, the harm can be turned into the benefit, and the waste can be changed into valuable. The comprehensive utilization of a large amount of solid waste is developed, so that the pollutant discharge is reduced, the environmental hazard is eliminated, the energy is saved, the carbon is reduced, and the power is contributed to carbon peak reaching and carbon neutralization.
In a coal gasification technical system, inorganic mineral substances in coal are subjected to different physical and chemical transformations, and carbon particle solid residues remained in the coal are divided into coarse residues and fine residues. The coarse slag generated in the gasification furnace is discharged in an amount of 60-80%; the fine slag is mainly generated in a device of the synthesis gas, and accounts for 20-40 percent. At present, the gasified slag is mainly piled and buried, so that serious environmental pollution and land resource waste are caused, the sustainable development of coal chemical enterprises is adversely affected, the reutilization of the gasified slag becomes a new problem to be expected to be solved, and the treatment of the gasified slag is urgent.
At present, the mutual cooperation of the technologies of vibration screen dehydration and filter press dehydration is mostly adopted in the field of coal gasification slag treatment to treat coarse slag and fine slag in residues, but the comprehensive utilization rate and the energy consumption are high by only using a high-frequency vibration screen and a centrifugal machine for dehydration, for example, in the field of coal slime treatment, most of the coal slime is subjected to deashing separation by using a flotation column, a foaming agent and kerosene of a flotation machine, the process is complex, the investment is large, the energy consumption is large, the operation cost is high, the recovery rate is low, the maximum utilization value of resources is not reached, and the comprehensive utilization efficiency of the gasification slag cannot be effectively improved.
Therefore, it becomes necessary to develop a comprehensive utilization approach of the coal chemical industry gasification slag with simple process and low cost and to develop comprehensive utilization of the coal chemical industry gasification slag.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that the existing gasified slag treatment process is complex, the recovery rate is low, the cost is high, the ideal utilization value cannot be achieved, and the comprehensive utilization efficiency of the gasified slag cannot be effectively improved, and provides a gasified slag extraction and recycling system.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a gasification slag extraction and reuse system is characterized in that: the device comprises a clean water tank, a gasified slag stirring tank, a first vibrating screen, a first separator set, a second separator set and a second filter press;
the clean water tank is used for supplying water to a system;
the discharge hole of the gasification slag stirring tank is connected with the feed inlet of the first vibrating screen;
the screen lower discharge port of the first vibrating screen is connected with the feed port of the first sorting unit;
the rough concentrate discharge hole of the first separator set is connected with the feed inlet of the second separator set;
and a concentrate discharge hole of the second separator set is connected with a second filter press.
Further, the device comprises a third sorting unit, a third vibrating screen and a fourth vibrating screen;
the concentrate discharge hole of the second separator set is connected with the feed inlet of the third separator set;
the fixed carbon discharge hole of the third sorting unit is connected with the feed hole of a third vibrating screen;
the high-heat-quality electric coal discharge port of the third separator set is connected with the feed port of the fourth vibrating screen;
and the screen discharge port of the third vibrating screen and the screen discharge port of the fourth vibrating screen are both connected with a second filter press.
Further, a desliming screen is included;
the lower discharge port of the first vibrating screen is connected with the feed port of the desliming screen, and the upper discharge port of the desliming screen is connected with the fine slag pool;
and water screened by the desliming screen enters a concentration tank or a fine tailing tank through a self-flowing pipe or a trash slurry pump.
Further, the system comprises a feeding hopper, a fine slag pool, a glass crystal bin, a rough concentrate pool, a second vibrating screen, a fine tailing pool, a first filter press, a concentrate pool, a high ash pool, a first slurry pump, a second slurry pump, a fixed carbon bin, a high-heat quality electric coal bin, a clean coal pool, a clean coal bin, a tailing bin, a dryer, a recycling production line and a rough tailing bin;
the discharge hole of the feeding hopper is connected with the feed inlet of the gasification slag stirring tank;
the screen lower discharge port of the first vibrating screen is connected with the fine slag pool, and the screen upper discharge port of the first vibrating screen is connected with the glass crystal bin;
the bottom flow port of the fine slag pool is connected with the feed inlet of the first sorting unit;
a coarse concentrate discharge hole of the first separator set is connected with the coarse concentrate pool, and a coarse tailing discharge hole of the first separator set is connected with a feed inlet of the second vibrating screen;
the discharge port on the screen of the second vibrating screen is connected with the feed port of the coarse tailing bin, and the discharge port under the screen of the second vibrating screen is connected with the fine tailing pond;
the underflow opening of the rough concentrate pond is connected with the feed inlet of the second separator set;
a concentrate discharge hole of the second separator set is connected with a feed hole of the concentrate pond, and a high-ash discharge hole of the second separator set is connected with the high-ash pond or the fine tailing pond;
the underflow opening of the fine tailing pond is connected with the feed inlet of the first filter press; the discharge hole of the first filter press is connected with the feed inlet of the tailing bin; the discharge hole of the tailing bin is connected with a recycling production line;
the bottom flow port of the concentrate pond is connected with the feed inlet of the third separator set;
a fixed carbon discharge port of the third separator set is connected with a feed port of a first slurry mixing pump, a discharge port of the first slurry mixing pump is connected with a feed port of a third vibrating screen, and an oversize discharge port of the third vibrating screen is connected with a fixed carbon bin;
the discharge port of the high-thermal-quality electric coal of the third separator set is connected with the feed port of the second slurry pump, the discharge port of the second slurry pump is connected with the feed port of the fourth vibrating screen, and the discharge port on the screen of the fourth vibrating screen is connected with the high-thermal-quality electric coal bin;
the screen lower discharge port of the third vibrating screen and the screen lower discharge port of the fourth vibrating screen are both connected with the feed port of the clean coal pool;
and a underflow port of the clean coal pool is connected with a second filter press, and clean coal is dehydrated by the second filter press and then conveyed to a clean coal bin.
Further, the fixed carbon bin and the high-heat-quality electric coal bin are both connected with a dryer and used for drying the fixed carbon and the high-heat-quality electric coal to obtain a fixed carbon product and a high-heat-quality electric coal product;
the gasification slag stirring pool, the fine slag pool, the coarse concentrate pool, the concentrate pool and the clean coal pool are connected with the clean water pool through a self-flowing pipe or a clean water pump;
the water which is removed by filter pressing of the first filter press and the second filter press is connected with the concentration tank through a self-flowing pipe or a heterogeneous pump;
the concentration tank is connected with the clean water tank.
Furthermore, conveying belts are arranged between the feeding hopper and the gasification slag stirring tank, between the first vibrating screen and the glass crystal bin, between the second vibrating screen and the rough tailings bin, between the third vibrating screen and the fixed carbon bin and between the fourth vibrating screen and the high-heat-quality electric coal bin.
Further, the first vibrating screen, the second vibrating screen, the third vibrating screen and the fourth vibrating screen are all high-frequency vibrating screens;
the first sorting machine set, the second sorting machine set and the third sorting machine set are formed by connecting one or more sorting machines in series, and the sorting machines can be common sorting machines, TPS (thermoplastic polystyrene) interference bed sorting machines or spiral sorting grooves;
the first filter press and the second filter press are connected in series by a single filter press or a plurality of filter presses, and the filter press can be a common filter press, a plate-and-frame filter press or a back-flushing filter press;
the recycling production line is a baking-free brick production line and a coal mine solidified product filler production line;
the dryer is a biomass dryer or a natural gas dryer.
Further, the vibration frequencies of the first vibrating screen, the second vibrating screen, the third vibrating screen and the fourth vibrating screen are all 960-1440 rpm.
Compared with the prior art, the utility model has the following beneficial technical effects:
1. the gasification slag extraction and recycling system provided by the utility model can be used for recycling solid waste, particularly changing waste into valuable by dehydrating fine materials of gasification slag, effectively reduces the overall energy consumption of equipment, improves the production process flow, has high accurate recovery rate, can effectively promote the maximum energy utilization rate, saves water, saves energy, reduces emission, and is beneficial to better treating environmental pollution.
2. The gasification slag extracting and recycling system provided by the utility model can enable the comprehensive extraction utilization rate of the existing gasification slag in the coal chemical industry to reach more than 95%, which is far higher than the comprehensive utilization rate of about 50% in the same industry. The extraction rate of the fixed carbon can reach about 40%, the extraction rate of the high-heat-quality electric coal can reach about 25%, the extraction rate of the glass crystal can reach about 15%, and about 20% of the residual tailings can be completely used as a baking-free brick raw material and a coal mine solidified product filler raw material.
Drawings
FIG. 1 is a schematic view of a system for extracting and recycling gasified slag according to the present invention;
reference numerals:
1-feeding hopper, 2-gasification slag stirring pool, 3-first vibrating screen, 4-fine slag pool, 5-glass crystal bin, 6-first sorting unit, 7-coarse concentrate pool, 8-second vibrating screen, 9-second sorting unit, 10-fine tailing pool, 11-first filter press, 12-concentrate pool, 13-high ash pool, 14-third sorting unit, 15-first slurry pump, 16-second slurry pump, 17-third vibrating screen, 18-fourth vibrating screen, 19-fixed carbon bin, 20-high-heat quality electric coal bin, 21-fine coal pool, 22-second filter press, 23-fine coal bin, 24-tailing bin, 25-reuse production line, 26-dryer, 27-concentration pool, 28-clean water pool, 29-coarse tailing bin and 30-desliming sieve.
Detailed Description
In order to make the objects, advantages and features of the present invention more apparent, a gasification slag extraction and reuse system according to the present invention will be described in detail with reference to the accompanying drawings and embodiments. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and the terms "first" and "second" are used for descriptive purposes only and are not intended to indicate or imply relative importance unless otherwise explicitly stated or limited.
Referring to fig. 1, a coal chemical gasification slag extracting and recycling system comprises a feeding hopper 1, a gasification slag stirring tank 2, a first vibrating screen 3, a fine slag tank 4, a glass crystal bin 5, a first sorting unit 6, a coarse concentrate tank 7, a second vibrating screen 8, a second sorting unit 9, a fine tailing tank 10, a first pressure filter 11, a concentrate tank 12, a high ash tank 13, a third sorting unit 14, a first impurity slurry pump 15, a second impurity slurry pump 16, a third vibrating screen 17, a fourth vibrating screen 18, a fixed carbon bin 19, a high-heat quality electric coal bin 20, a clean coal bin 21, a second pressure filter 22, a clean coal bin 23, a tailing bin 24, a dryer 26, a recycling production line 25, a concentration tank 27, a clean water tank 28, a coarse tailing bin 29 and a desliming screen 30.
The first vibrating screen 3, the second vibrating screen 8, the third vibrating screen 17 and the fourth vibrating screen 18 are all high-frequency vibrating screens; the first sorting machine set 6, the second sorting machine set 9 and the third sorting machine set 14 are one or more sorting machines connected in series, and the sorting machines can be common sorting machines, TPS interference bed sorting machines or spiral sorting grooves; the first filter press 11 and the second filter press 22 are single or multiple filter presses connected in series, and the filter presses can be common filter presses, plate-and-frame filter presses or reverse-blowing filter presses. And then a baking-free brick production line and a coal mine solidified product filler production line are utilized by a production line 25. Dryer 26 is a biomass dryer or a natural gas dryer.
The discharge gate of feeding funnel 1 is connected with the feed inlet of gasification sediment stirring pond 2 through conveyor belt, and the gasification sediment solid and the moisture in clean water basin 28 enter into gasification sediment stirring pond 2 through the raw materials inlet port and the water source inlet port of gasification sediment stirring pond 2 respectively, and the agitator in gasification sediment stirring pond 2 is transferred thick liquid for the gasification sediment fully dispersed.
The discharge gate of gasification sediment stirring pond 2 is connected with the feed inlet of first shale shaker 3, and the undersize discharge gate of first shale shaker 3 is connected with fine sediment pond 4, and the oversize discharge gate is connected with glass crystal storehouse 5. Conveying the gasified slag slurry in the gasified slag stirring tank 2 to a first vibrating screen 3, and separating fine slag and coarse slag of the materials under the action of vibration, wherein the fine slag with the size of 0.05mm-0.3mm and the glass crystal with the size of 0.3mm-1.00mm are firstly separated. Or a conveying belt can be arranged at the screen material outlet and the screen material outlet of the first vibrating screen 3, the separated glass crystals are directly conveyed to the glass crystal bin 5, and the obtained glass crystals can be used as cement or concrete building material raw materials.
The screen lower discharge port of the first vibrating screen 3 can also be preferentially connected with the screen feed port of the desliming screen 30, the screen upper discharge port of the desliming screen 30 is connected with the fine slag pool 4, the fine slag separated by the first vibrating screen 3 is deslimed under the vibration of the desliming screen 30 and automatically flows into the fine slag pool 4; the undersize of the desliming screen 30 may flow automatically into the thickening tank 27 or into the fine tailings pond 10.
The clean water tank 28 introduces a water source through a pipeline to enter the fine slag tank 4, the underflow port of the fine slag tank 4 is connected with the feed port of the first separator set 6, the fine slag is conveyed to the first separator set 6 to be separated, coarse concentrate and coarse tailings are obtained, the coarse concentrate discharge port of the first separator set 6 is connected with the coarse concentrate tank 7, and the coarse tailings discharge port of the first separator set 6 is connected with the feed port of the second vibrating screen 8.
The second vibrating screen 8 further carries out vibration separation and dehydration on the coarse tailings to obtain tailings particles and tailings with the particle size of 0.05mm-0.3 mm. The oversize discharge port of the second vibrating screen 8 is connected with the feed inlet of the coarse tailings bin 29, the undersize discharge port of the second vibrating screen 8 is connected with the fine tailings pond 10, and a conveying belt can be mounted at the oversize discharge port of the second vibrating screen 8 to convey tailings particles of 0.05mm-0.3mm, so that the manual and mechanical transfer times are reduced. The tailing particles can be reused as novel building materials and fillers of solidified products of coal mines.
The clean water tank 28 introduces water source into the rough concentrate tank 7 through a pipeline, the underflow port of the rough concentrate tank 7 is connected with the feed inlet of the second separator set 9, the rough concentrate pulp can be directly conveyed to the second separator set 9 through a rough pulp pump or through a rough pulp pump for separation, and concentrate and high ash are further separated.
The concentrate discharge port of the second separator set 9 is connected with the feed port of the concentrate tank 12, the obtained concentrate is further separated and reused, the high ash discharge port of the second separator set 9 is connected with the high ash tank 13, and the obtained high ash can be sold and reused as a high ash product or conveyed to the fine tailing tank 10.
The underflow opening of the fine tailing pond 10 is connected with the feed inlet of the first filter press 11, and the tailing mixed high ash is subjected to filter pressing and dehydration treatment. The discharge hole of the first filter press 11 is connected with the feed inlet of the tailing bin 24, and the tailings extruded by the first filter press 11 can be reused as novel building materials and coal mine solidified product fillers.
Meanwhile, the tailings and the high ash in the tailing bin 24 can be fully mixed in the tailing bin 24 and then are further conveyed to a recycling production line 25, so that the filler can be recycled to obtain a baking-free brick or a coal mine solidified product filler for a baking-free brick production line or a coal mine solidified product production line, and coarse slag in gasified slag can be efficiently utilized.
And thirdly, the clean water tank 28 introduces a water source into the concentrate tank 12 through self-flow or a clean water pump, a bottom flow port of the concentrate tank 12 is connected with a feed inlet of the third separator unit 14, and concentrate pulp can be directly conveyed to the third separator unit 14 through a mixed pulp pump or is conveyed to be separated so as to further separate out fixed carbon and high-heat quality electric coal.
The fixed carbon discharge port of the third separator set 14 is connected with the feed port of the first impurity slurry pump 15, the discharge port of the first impurity slurry pump 15 is connected with the feed port of the third vibrating screen 17, the oversize discharge port of the third vibrating screen 17 is connected with the fixed carbon bin 19, a conveying belt can be installed between the oversize discharge port of the third vibrating screen 17 and the fixed carbon bin 19 to convey fixed carbon, and the number of times of manual operation and mechanical transportation is reduced. The separated fixed carbon slurry is mixed and pumped into a third vibrating screen 17 through a first slurry mixing pump 15, and the fixed carbon is screened out through the third vibrating screen 17.
The high-heat-quality electric coal discharge port of the third separator group 14 is connected with the feed port of the second slurry pump 16, the discharge port of the second slurry pump 16 is connected with the feed port of the fourth vibrating screen 18, the screen upper discharge port of the fourth vibrating screen 18 is connected with the high-heat-quality electric coal bin 20, and a conveying belt can also be installed between the screen upper discharge port of the fourth vibrating screen 18 and the high-heat-quality electric coal bin 20 to convey high-heat-quality electric coal, so that the manual operation and mechanical transfer times are reduced. The sorted high-heat-quality electric coal slurry is mixed and pumped into a fourth vibrating screen 18 through a second slurry pump 16, and the high-heat-quality electric coal is screened out through the fourth vibrating screen 18.
The fixed carbon bin 19 and the high thermal mass electric coal bin 20 can dry the fixed carbon and the high thermal mass electric coal by a dryer 26 to obtain a fixed carbon product and a high thermal mass electric coal product.
The screen underflow outlet of the third vibrating screen 17 and the screen underflow outlet of the fourth vibrating screen 18 are both connected with the feed inlet of the clean coal pool 21 to obtain mixed clean coal slurry; the underflow port of the clean coal pool 21 is connected with the second filter press 22, and the clean coal is dehydrated by the second filter press 22 and then automatically flows or is conveyed to the clean coal bin 23 to obtain a clean coal product.
In this system, all filter-press dewatering, vibration dewatering or sedimentation ponding is connected to a concentration tank 27 through a pipeline or a trash slurry pump, flows into a clean water tank 28 after being precipitated by the concentration tank, and is recycled to provide a water source for the system. The center of the concentration tank is provided with a thickener, the bottom of the concentration tank is provided with a scraper, concentrated tailings are scraped at a central column low flow pipe through the scraper, a single or a plurality of impurity slurry pumps with the volume of 150-900 per hour are connected and are driven into a single or a plurality of filter presses for the tailings, and the tailings are extruded to be used as novel building materials and coal mine solidified product fillers.
In conclusion, by the extraction and reutilization system of the gasified slag in the coal chemical industry, glass crystals, high ash, tailings, fixed carbon, high-heat quality electric coal and clean coal products are obtained through separation, and the baking-free brick or the cured coal mine filler is obtained through reutilization of the coarse slag, the coarse tailings and the high ash.
The specific process steps of the gasification slag extraction and recycling system for recycling the gasification slag are as follows:
and step 1, conveying the gasified slag solid into an upper hopper 1.
Step 2, the solid and water of the gasified slag enter the gasified slag stirring pool 2 through a raw material inlet and a water source inlet of the gasified slag stirring pool 2 respectively, and slurry mixing is carried out in a stirrer in the gasified slag stirring pool 2, so that the gasified slag is fully dispersed;
a discharge port of the feed hopper 1 is provided with a conveying belt, and the gasified slag is conveyed into a gasified slag stirring pool 2; according to the solid amount of the gasification slag, 150-900 cubic clean water is mixed and stirred in the gasification slag stirring tank 2 every hour.
Step 3, conveying the gasified slag slurry to a high-frequency first vibrating screen 3, and separating coarse slag and fine slag of the material under the action of vibration to obtain glass crystals and fine slag;
the gasified slag ore pulp can automatically flow or be pumped into a first vibrating screen 3 through a single or a plurality of slurry pumps, the frequency of the first vibrating screen 3 is 960-1440 revolutions per minute, fine slag and coarse slag of the materials are separated under the action of vibration, the glass crystals with the thickness of 0.3mm-1.00mm are directly conveyed into a glass crystal bin 5 through the material outlet on the screen by automatic flow or the arrangement of a conveying belt, and the material outlet under the screen automatically flows into a fine slag pool 4.
The screen lower discharge port of the first vibrating screen 3 can also be preferentially connected with the screen feed port of the desliming screen 30, the screen upper discharge port of the desliming screen 30 is connected with the fine slag pool 4, the fine slag separated by the first vibrating screen 3 is deslimed under the vibration of the desliming screen 30 and automatically flows into the fine slag pool 4; the undersize of the desliming screen 30 may flow automatically into the thickening tank 27 or into the fine tailings pond 10.
Step 4, conveying the glass crystals to a glass crystal bin (5); simultaneously, fine slag and water respectively enter the fine slag pool 4 through a raw material inlet and a water source inlet of the fine slag pool 4, and size mixing is carried out in the fine slag pool 4, so that the fine slag is fully dispersed;
according to the amount of the fine slag, the fine slag pool 4 is fully stirred by adding 900 cubes of clear water per hour.
And 5, pumping the fine slag slurry into a first separator unit 6 for separation by gravity flow or through one or more slurry pumps to obtain coarse concentrate and coarse tailings.
And 6, automatically flowing or conveying the obtained coarse tailings to a high-frequency second vibrating screen 8 for vibration dehydration, wherein the frequency of the second vibrating screen 8 is 960-1440 revolutions per minute, and tailings particles and tailings with the diameter of 0.05-0.3 mm are obtained.
And 7, conveying the tailing particles separated by the second vibrating screen 8 to a coarse tailing bin 29 by self-flowing or through a conveying belt, and conveying the tailings below the screen to a fine tailing pond 10.
Step 8, enabling the rough concentrate and the water obtained in the step 5 to enter the rough concentrate pool 7 through a raw material inlet and a water source inlet of the rough concentrate pool 7 respectively, and enabling the rough concentrate to be fully dispersed;
according to the amount of fine slag, the coarse concentrate pool 7 is fully stirred by adding 900 cubes of clear water every hour.
And 9, automatically flowing the coarse concentrate pulp or pumping the coarse concentrate pulp into a second separator set 9 through one or more slurry pumps for separation, and further separating out the concentrate and the high ash.
And step 10, conveying the sorted high ash to a high ash pond 13 for sale as a high ash product, or automatically flowing into a fine tailing pond 10, mixing with the tailings obtained in the step 7, pumping into a single or multiple first filter presses 11 connected in series through a single or multiple slurry pumps for filter pressing and dehydration, conveying into a recycling production line 25, namely a baking-free brick production line or a coal mine solidified product production line, recycling to obtain a baking-free brick or coal mine solidified product filler, and extruding tailings to be used as a novel building material and a coal mine solidified product filler.
Step 11, enabling the concentrate and the water obtained in the step 9 to enter the concentrate tank 12 through a raw material inlet and a water source inlet of the concentrate tank 12 respectively so as to fully disperse the concentrate;
according to the amount of fine slag, the concentrate pool 12 is fully stirred by adding 900 cubes of clear water every hour.
And step 12, the concentrate pulp flows automatically or is pumped into a third separator set 14 through one or more slurry pumps for separation, and fixed carbon and high-heat-quality electric coal are further separated.
Step 13, pumping the fixed carbon into a pool by a first slurry pump 15 and stirring, conveying the mixed carbon into a third vibrating screen 17 for vibration dehydration, drying the fixed carbon on the screen by a dryer 26, and conveying the dried fixed carbon to a fixed carbon bin 19 by gravity flow or a conveying belt;
meanwhile, high-heat-quality electric coal flows automatically or is thrown into the pool through a second slurry pump 16 and then is stirred, the high-heat-quality electric coal is conveyed to a fourth vibrating screen 18 for vibration dehydration, and the high-heat-quality electric coal on the screen flows automatically or is conveyed to a high-heat-quality electric coal bin 20 through a conveying belt after being dried by a dryer 26.
And step 14, connecting screen lower discharge ports of the third vibrating screen 17 and the fourth vibrating screen 18 into a clean coal tank 21, connecting a water source to fully disperse clean coal, and fully stirring 150-cubic clean water per hour in the clean coal tank 21 according to the clean coal amount to form clean coal slurry.
And step 15, pumping the clean coal slurry into a single or a plurality of second filter presses 22 connected in series by self-flowing or through a single or a plurality of slurry pumps, and conveying the dehydrated clean coal slurry to a clean coal bin 23 to obtain a clean coal product.
After secondary separation, the concentrate and the high ash can be automatically flowed or pumped into a vibrating screen by one or more than one slurry pump without further separation, the screened clean coal slurry is pumped into one or more than one second filter press 22 connected in series by one or more than one slurry pump, and the clean coal slurry is automatically flowed or conveyed to a clean coal bin 23 after dehydration treatment, so that a clean coal product is obtained.
To sum up, the materials uniformly enter a gasification slag stirring pool from a feed hopper, enter a high-frequency vibrating screen for separation after wet washing and stirring, the coarse slag on the screen is sent to a baking-free brick machine production line, enters TPS (thermoplastic polystyrene) washing equipment under the screen, is separated according to density by utilizing interference sedimentation, does not need a medium, forms turbulent flow by water flow sprayed by hundreds of high-pressure spray nozzles at the bottom, and realizes interference sedimentation with gasification slag particles.
The method separates and extracts glass crystals, coarse tailing particles, high ash, fine tailings, fixed carbon, high-heat quality electric coal and clean coal products in a tailing bin, removes water from coarse slag, coarse tailing and high ash through a high-pressure back-blowing filter press, and enters a baking-free brick machine production line (a proportioning machine, a feeding machine, a stirring machine, a belt conveyor, a brick machine, a brick blank, curing, finished product and leaving factory) to obtain the baking-free brick.
The technological process of the system is simple to operate, high in recovery rate, low in investment, low in energy consumption and low in operation cost, can achieve the purposes of pollution reduction, carbon reduction, synergy and carbon neutralization, can achieve the long-range goal of carbon peak reaching and carbon neutralization, and simultaneously turns the gasified slag into harm and benefit and changes waste into valuable.
The utility model extracts the energy and carbon elements of the solid waste, reduces the resource loss and the energy loss, also reduces the discharge amount of the solid waste, reduces the occupation amount of the traditional landfill land, and reduces the environmental pollution and the risk. The extracted fixed carbon is high-quality fixed carbon for producing active carbon, and the extracted electric coal is high-quality electric coal for power plants and thermal power plants. The extracted glass crystal is high-quality glass crystal in ceramic factories and cement factories. The tailings are used for producing novel building materials and coal mine solidified product fillers, the produced novel building material baking-free bricks replace the traditional baked bricks, and the produced coal mine solidified product fillers are used for filling collapse areas and coal mining areas of coal mines.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the present invention.
Claims (8)
1. A gasification slag extraction and reuse system is characterized in that: comprises a clean water tank (28), a gasified slag stirring tank (2), a first vibrating screen (3), a first sorting unit (6), a second sorting unit (9) and a second filter press (22);
the clean water tank (28) is used for supplying water to the system;
the discharge hole of the gasified slag stirring tank (2) is connected with the feed hole of the first vibrating screen (3);
the screen lower discharge port of the first vibrating screen (3) is connected with the feed port of the first sorting unit (6);
the rough concentrate discharge hole of the first separator set (6) is connected with the feed inlet of the second separator set (9);
and a concentrate discharge hole of the second separator set (9) is connected with a second filter press (22).
2. The gasification slag extraction and reuse system according to claim 1, wherein:
comprises a third sorting machine set (14), a third vibrating screen (17) and a fourth vibrating screen (18);
the concentrate discharge hole of the second separator set (9) is connected with the feed inlet of the third separator set (14);
a fixed carbon discharge hole of the third sorting unit (14) is connected with a feed hole of a third vibrating screen (17);
a high-heat-quality electric coal discharge port of the third separator set (14) is connected with a feed port of a fourth vibrating screen (18);
and the screen discharge port of the third vibrating screen (17) and the screen discharge port of the fourth vibrating screen (18) are both connected with a second filter press (22).
3. The gasification slag extraction and reuse system according to claim 2, wherein:
comprises a desliming screen (30);
the screen lower discharge port of the first vibrating screen (3) is connected with the feed port of the desliming screen (30), and the screen upper discharge port of the desliming screen (30) is connected with the fine slag pool (4);
and water screened by the desliming screen (30) enters the concentration tank (27) or the fine tailing tank (10) through a gravity pipe or a slurry pump.
4. The gasification slag extraction and reuse system according to any one of claims 1 to 3, wherein:
the device comprises a feeding hopper (1), a fine slag pool (4), a glass crystal bin (5), a coarse concentrate pool (7), a second vibrating screen (8), a fine tailing pool (10), a first filter press (11), a concentrate pool (12), a high ash pool (13), a first slurry pump (15), a second slurry pump (16), a fixed carbon bin (19), a high-heat quality electric coal bin (20), a clean coal pool (21), a clean coal bin (23), a tailing bin (24), a dryer (26), a recycling production line (25) and a coarse tailing bin (29);
the discharge hole of the feeding hopper (1) is connected with the feed inlet of the gasification slag stirring tank (2);
the screen lower discharge port of the first vibrating screen (3) is connected with the fine slag pool (4), and the screen upper discharge port is connected with the glass crystal bin (5);
the underflow opening of the fine slag pool (4) is connected with the feed inlet of the first sorting unit (6);
a rough concentrate discharge hole of the first separator set (6) is connected with the rough concentrate pool (7), and a rough tailings discharge hole of the first separator set (6) is connected with a feed hole of the second vibrating screen (8);
the screen upper discharge hole of the second vibrating screen (8) is connected with the feed inlet of the coarse tailing bin (29), and the screen lower discharge hole of the second vibrating screen (8) is connected with the fine tailing pond (10);
the underflow opening of the rough concentrate pond (7) is connected with the feed inlet of the second separator set (9);
a concentrate discharge hole of the second separator set (9) is connected with a feed inlet of the concentrate pond (12), and a high-ash discharge hole of the second separator set (9) is connected with a high-ash pond (13) or a fine tailing pond (10);
the underflow opening of the fine tailing pond (10) is connected with the feed inlet of the first filter press (11); the discharge hole of the first filter press (11) is connected with the feed inlet of the tailing bin (24); the discharge hole of the tailing bin (24) is connected with a recycling production line (25);
the bottom flow port of the concentrate tank (12) is connected with the feed inlet of the third separator set (14);
a fixed carbon discharge port of the third separator set (14) is connected with a feed port of a first slurry mixing pump (15), a discharge port of the first slurry mixing pump (15) is connected with a feed port of a third vibrating screen (17), and an on-screen discharge port of the third vibrating screen (17) is connected with a fixed carbon bin (19);
a high-heat-quality electric coal discharge port of the third separator set (14) is connected with a feed port of a second slurry pump (16), a discharge port of the second slurry pump (16) is connected with a feed port of a fourth vibrating screen (18), and an oversize discharge port of the fourth vibrating screen (18) is connected with a high-heat-quality electric coal bin (20);
the screen discharge port of the third vibrating screen (17) and the screen discharge port of the fourth vibrating screen (18) are both connected with the feed port of the clean coal pool (21);
and a underflow port of the clean coal pool (21) is connected with a second filter press (22), and the clean coal is dehydrated by the second filter press (22) and then conveyed to a clean coal bin (23).
5. The gasification slag extraction and reuse system according to claim 4, wherein:
the fixed carbon bin (19) and the high-heat-quality electric coal bin (20) are connected with a dryer (26) and are used for drying fixed carbon and high-heat-quality electric coal to obtain a fixed carbon product and a high-heat-quality electric coal product;
the gasification slag stirring pool (2), the fine slag pool (4), the coarse concentrate pool (7), the concentrate pool (12) and the clean coal pool (21) are connected with a clean water pool (28) through a self-flowing pipe or a clean water pump;
the water which is removed by filter pressing of the first filter press (11) and the second filter press (22) is connected with a concentration tank (27) through a gravity flow pipe or a slurry pump;
the concentration tank (27) is connected with a clean water tank (28).
6. The gasification slag extraction and reuse system according to claim 5, wherein:
conveying belts are arranged between the feeding hopper (1) and the gasification slag stirring tank (2), between the first vibrating screen (3) and the glass crystal bin (5), between the second vibrating screen (8) and the rough tailing bin (29), between the third vibrating screen (17) and the fixed carbon bin (19) and between the fourth vibrating screen (18) and the high-heat-quality electric coal bin (20).
7. The gasification slag extraction and reuse system according to claim 6, wherein:
the first vibrating screen (3), the second vibrating screen (8), the third vibrating screen (17) and the fourth vibrating screen (18) are all high-frequency vibrating screens;
the first sorting machine set (6), the second sorting machine set (9) and the third sorting machine set (14) are formed by connecting one or more sorting machines in series, and the sorting machines can be common sorting machines, TPS interference bed sorting machines or spiral sorting tanks;
the first filter press (11) and the second filter press (22) are connected in series by one or more filter presses, and the filter press can be a common filter press, a plate-and-frame filter press or a back-blowing filter press;
the recycling production line (25) is a baking-free brick production line and a coal mine solidified product filler production line;
the dryer (26) is a biomass dryer or a natural gas dryer.
8. The gasification slag extraction and reuse system according to claim 7, wherein:
the vibration frequencies of the first vibrating screen (3), the second vibrating screen (8), the third vibrating screen (17) and the fourth vibrating screen (18) are 960 and 1440 revolutions per minute.
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Address after: 710000 No. 10101, Qujiang Film and Television Building, No. 1868, Yannan Fifth Road, Qujiang New District, Xi'an, Shaanxi Patentee after: Shaanxi Shaanxi Carbon Group Holding Co.,Ltd. Address before: 710018 50902, floor 9, unit 5, building 10, baihualinju, Fengcheng ninth Road, Xi'an Economic and Technological Development Zone, Shaanxi Province Patentee before: Shaanxi carbon extraction energy conservation and environmental protection technology (Group) Co.,Ltd. |
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Effective date of registration: 20230920 Address after: 710000 No. 10101, Qujiang Film and Television Building, No. 1868, Yannan Fifth Road, Qujiang New District, Xi'an, Shaanxi Patentee after: Xi'an Haohui Future Technology Co.,Ltd. Address before: 710000 No. 10101, Qujiang Film and Television Building, No. 1868, Yannan Fifth Road, Qujiang New District, Xi'an, Shaanxi Patentee before: Shaanxi Shaanxi Carbon Group Holding Co.,Ltd. |
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Effective date of registration: 20231101 Address after: 710000 No. 10101, Qujiang Film and Television Building, No. 1868, Yannan Fifth Road, Qujiang New District, Xi'an, Shaanxi Patentee after: Shaanxi Shaanxi Carbon Group Holding Co.,Ltd. Address before: 710000 No. 10101, Qujiang Film and Television Building, No. 1868, Yannan Fifth Road, Qujiang New District, Xi'an, Shaanxi Patentee before: Xi'an Haohui Future Technology Co.,Ltd. |