CN210012823U - Carbon device is carried to fine ash of coal gasification - Google Patents
Carbon device is carried to fine ash of coal gasification Download PDFInfo
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- CN210012823U CN210012823U CN201920217667.5U CN201920217667U CN210012823U CN 210012823 U CN210012823 U CN 210012823U CN 201920217667 U CN201920217667 U CN 201920217667U CN 210012823 U CN210012823 U CN 210012823U
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Abstract
The utility model relates to a coal gasification fine ash carbon extraction device; the device comprises a gasification clarification tank, wherein the gasification clarification tank is connected with a gasification system through a supernatant pipeline, the bottom of the gasification clarification tank is connected with a flotation unit through a slurry stirring and deflocculation pretreatment unit, an upper overflow pipeline of the flotation unit is connected with a pulverized coal thickening tank through a defoaming device, and a lower bed charge outlet at the bottom of the pulverized coal thickening tank is connected with a pulverized coal bunker through a solid phase outlet of a pulverized coal diaphragm filter pressing device; the device has the advantages of simple structure, reasonable design, high resource utilization rate, environmental friendliness, stable and efficient device operation and obvious economic benefit, and related medicaments can be recycled.
Description
Technical Field
The utility model belongs to the technical field of carbon is carried to coal gasification fine dust, concretely relates to carbon is carried to coal gasification fine dust device.
Background
The coal water slurry gasification furnace is a mainstream gasification mode in the coal chemical industry at present, and representative furnace types comprise a GE furnace, a pigeonry furnace, a multi-raw material slurry furnace, a four-nozzle gasification furnace and the like, the coal water slurry with low ash content is taken as a raw material and is sprayed into the gasification furnace at a high speed through a nozzle under the entrainment effect of a gasification agent for short-time combustion, the coal water slurry is subjected to oxidation combustion after being preheated and dehydrated in the furnace, and the coal water slurry can only be combusted for several seconds under the pushing effect of high-pressure airflow and then leaves high-temperature radiation to be chilled by water, so that part of organic matters are; if the potential energy generated by the temperature reduction caused by the heat absorption of the coal water slurry is higher than the total heat released by the fire coal, the phenomenon that the coal powder is wrapped by the molten-state ash can occur, and the continuous contact between organic matters and the gasifying agent is blocked.
The gasification furnace adopts a liquid slag discharging mode, a large amount of ash and unburned carbon particles of generated high-temperature and high-pressure coal gas enter a water washing system under the action of a chilling chamber and a coal gas washing system, the generated high-temperature and high-pressure black water is subjected to multi-stage flash evaporation to recover heat and then becomes ash water with the solid content of 1-3%, and the ash water is subjected to flocculation and precipitation in a clarifying tank and is purified so as to be recycled. The slurry discharged from the bottom of the clarifier is usually dehydrated by a mechanical dewatering method such as a belt filter press or a diaphragm filter press to form gasified fine slag, and the gasified fine slag is stocked in a field and sold or mixed into a fluidized bed boiler for consumption. Substances mainly contained in gasified ash include inorganic mineral melts and unburned carbon included therein, and the unburned carbon exists in different forms such as powder, flocculent and the like, and the chemical activity and the mechanical strength are reduced.
With the tightening of environmental protection policies in recent years, large environmental protection risks exist in site stockpiling, ash is directly discharged and stockpiled, resource waste and environmental pollution are caused, the risk of spontaneous combustion exists, and high environmental protection fine is paid; in addition, the situation that fine ash cannot be sold occurs due to the problems of environmental protection failure and market saturation in downstream brick kiln plants, and the phenomena of increased load of a dust removal system, abrasion of a water wall and the like are caused by the adoption of mixed combustion of a circulating fluidized bed boiler. The treatment methods do not realize the maximum utilization of resources, so that the quality-based treatment of extracting carbon from fine ash is adopted, the maximum utilization of resources can be realized, and the environmental protection risk is reduced. Coal ash flotation technology is a good way to solve this problem. The fine slag and the coarse slag both contain certain carbon content, the carbon in the ash slag is recycled, the coal resource can be saved and utilized, the method is a new direction for the technical development of clean coal, and the separated carbon product can be used in the field of utilization of carbon resources such as activated carbon preparation and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art and provide a carbon extraction device for coal gasification fine ash, which has the advantages of simple structure, reasonable design, high resource utilization rate, realization of recycling of related medicaments, environmental friendliness, stable and efficient operation of the device and obvious economic benefit.
The purpose of the utility model is realized like this: including gasification clarification tank, gasification clarification tank pass through the supernatant pipeline and link to each other with gasification system, the bottom of gasification clarification tank passes through thick liquids stirring and the deflocculation pretreatment unit links to each other with the flotation unit, and the upper portion overflow pipe of flotation unit passes through the fire fighting equipment and links to each other with the dense pond of buggy, and the solid phase export that the export of the lower floor bed charge of the dense pond bottom of buggy passes through buggy diaphragm filter pressing device links to each other with the buggy storehouse.
Preferably, the slurry stirring and deflocculating pretreatment unit comprises a slurry buffer tank with a stirrer, and the bottom of the slurry buffer tank is connected with a slurry pretreatment device with a deflocculant adding pipeline through a slurry pump; the feed inlet of the slurry buffer tank is connected with the bottom bed material outlet of the gasification clarification tank, and the middle supernatant pipeline outlet of the slurry pretreatment device is connected with the flotation device in the flotation unit.
Preferably, the flotation unit comprises at least one flotation device, when the flotation device is used, a feed inlet of the flotation device is connected with an outlet of a supernatant pipeline in the middle of the slurry pretreatment device, a flotation agent adding channel and a foaming agent adding channel are arranged at the top of the flotation device, an overflow pipeline in the upper part of the flotation device is connected with a defoaming device, and a flotation machine and a flotation pipeline connected with an aeration fan are arranged in the flotation device; a discharge port at the bottom of the flotation device is connected with a fine ash collecting unit, a medicament recycling unit and a wastewater treatment unit;
when a plurality of flotation device, a plurality of flotation device establish ties, upper flotation device's feed inlet links to each other with ground paste preprocessing device's middle part supernatant pipeline export, upper flotation device's top is equipped with flotation agent and adds the passageway and the foaming agent adds the passageway, flotation device top except upper flotation device is equipped with the foaming agent and adds the passageway, a plurality of flotation device's upper portion overflow pipe says and links to each other with fire fighting equipment respectively, aeration fan links to each other respectively through the inside flotation pipeline of pipeline with a plurality of flotation device respectively, a plurality of flotation device's inside is equipped with the flotation machine respectively, bottom flotation device's bottom discharge gate and fine ash collection unit, medicament recovery unit and waste water treatment unit link to each other.
Preferably, the number of the flotation devices is two.
Preferably, the fine ash collecting unit comprises a coal ash dense pool connected with a bottom discharge port of the flotation device, a bottom layer bottom material outlet at the bottom of the coal ash dense pool is connected with a coal ash diaphragm filter pressing device, and a solid material outlet of the coal ash diaphragm filter pressing device is connected with an ash bin.
Preferably, the medicament recovery unit comprises an oil separation tank, and the upper part of the oil separation tank is connected with the supernatant oily medicament recovery tank through a pipeline; the lower outlet of the oil separation tank is connected with the wastewater treatment unit, and the top inlet of the oil separation tank is respectively connected with the supernatant outlet at the upper part of the coal ash dense tank, the liquid phase outlet of the coal ash diaphragm filter pressing device and the liquid phase outlet of the coal ash diaphragm filter pressing device.
Preferably, the wastewater treatment unit comprises a biochemical reaction tank connected with the lower outlet of the oil separation tank, and the biochemical reaction tank is connected with the external discharge pipeline through an aeration treatment reaction tank.
According to the coal gasification fine ash carbon extraction device prepared by the scheme, the gasification fine ash enters a flotation device through pretreatment, so that 85-90% of clean coal and 95-98% of fine ash can be separated, meanwhile, oily wastewater generated by flotation is collected by an oil separation tank, the COD content is 500-600Mg/L, the PH is 7.5-8.2, the NH3-N content is 200-300Mg/L, TDS (soluble total solids) enters a biochemical reaction tank at 3500-4500Mg/L, and then is reasonably discharged; the problems that the gasified fine ash cannot be sold due to environmental protection and is easy to generate nature at present can be effectively solved, and the phenomena of increased load of a dust removal system, abrasion of a water wall and the like caused by mixed burning of a circulating fluidized bed boiler are avoided; the device and the process of the utility model can realize the quality-based treatment of extracting carbon from fine ash, realize the maximum utilization of resources and reduce the environmental protection risk; the coal gasification fine slag generally contains 19-27% of carbon content, the carbon in the slag is recycled, the coal resource can be saved and utilized, the coal gasification fine slag is a new direction for the technical development of clean coal, and the separated carbon product can be used in the field of utilization around the carbon resource such as activated carbon preparation and the like; the device has the advantages of simple structure, reasonable design, high resource utilization rate, environmental friendliness, stable and efficient device operation and obvious economic benefit, and related medicaments can be recycled.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
As shown in figure 1, the utility model relates to a carbon device is carried to coal gasification fine ash, including gasification depositing reservoir 1, gasification depositing reservoir 1 link to each other with gasification system 22 through the supernatant pipeline, slurry stirring and deflocculation pretreatment unit are passed through to gasification depositing reservoir 1's bottom and are linked to each other with the flotation unit, and the upper portion overflow pipeline of flotation unit passes through fire fighting equipment 9 and links to each other with buggy dense pond 13, and the solid phase export that the lower floor bed charge export of buggy dense pond 13 bottom passes through buggy diaphragm filter pressing device 12 links to each other with buggy storehouse 14. The slurry stirring and deflocculating pretreatment unit comprises a slurry buffer tank 2 with a stirrer 3, and the bottom of the slurry buffer tank 2 is connected with a slurry pretreatment device 5 with a deflocculant adding pipeline 8 through a slurry pump 4; the feed inlet of the slurry buffer tank 2 is connected with the bottom bed charge outlet of the gasification clarification tank 1, and the middle supernatant pipeline outlet of the slurry pretreatment device 5 is connected with a flotation device 7 in a flotation unit. The flotation unit comprises at least one flotation device 7, when one flotation device 7 is adopted, a feed inlet of the flotation device 7 is connected with a supernatant pipeline outlet in the middle of the slurry pretreatment device 5, a flotation agent adding channel 23 and a foaming agent adding channel 24 are arranged at the top of the flotation device 7, an overflow pipeline at the upper part of the flotation device 7 is connected with a defoaming device 9, and a flotation machine 25 and a flotation pipeline 20 connected with the aeration fan 6 are arranged inside the flotation device 7; a discharge port at the bottom of the flotation device 7 is connected with a fine ash collecting unit, a medicament recycling unit and a wastewater treatment unit; during a plurality of flotation device 7, a plurality of flotation device 7 establish ties, the feed inlet of upper flotation device 7 links to each other with the middle part supernatant pipeline export of ground paste preprocessing device 5, the top of upper flotation device 7 is equipped with flotation agent and adds passageway 23 and foaming agent and adds passageway 24, flotation device 7 top except upper flotation device 7 is equipped with the foaming agent and adds the passageway, the overflow pipe in upper portion of a plurality of flotation device 7 links to each other with foam breaker 9 respectively, aeration fan 6 links to each other respectively through pipeline and the inside flotation pipeline 20 of a plurality of flotation device 7, the inside of a plurality of flotation device 7 is equipped with flotation machine 25 respectively, bottom flotation device 7's bottom discharge gate and fine ash collection unit, the medicament recovery unit and waste water treatment unit link to each other. The number of the flotation devices 7 is two. The utility model discloses in the top of foam breaker 9 be provided with defoaming agent passageway 26. The fine ash collecting unit comprises a coal ash dense pool 10 connected with a bottom discharge hole of the flotation device 7, a lower-layer bottom material outlet at the bottom of the coal ash dense pool 10 is connected with a coal ash diaphragm filter pressing device 11, and a solid material outlet of the coal ash diaphragm filter pressing device 11 is connected with an ash bin 16. The drug recovery unit comprises an oil separation tank 17, and the upper part of the oil separation tank 17 is connected with a supernatant oily drug recovery tank 15 through a pipeline; the lower outlet of the oil separation tank 17 is connected with the wastewater treatment unit, and the top inlet of the oil separation tank 17 is respectively connected with the supernatant outlet at the upper part of the coal ash thickening tank 10, the supernatant outlet at the upper part of the coal powder thickening tank 13, the liquid phase outlet of the coal ash diaphragm filter pressing device 11 and the liquid phase outlet of the coal powder diaphragm filter pressing device 12. The wastewater treatment unit comprises a biochemical reaction tank 18 connected with the lower outlet of the oil separation tank 17, and the biochemical reaction tank 18 is connected with an external discharge pipeline 21 through an aeration treatment reaction tank 19.
A carbon extraction process of a coal gasification fine ash carbon extraction device comprises the following steps: under the clarification and separation action of the clarifying tank 1, supernatant liquor of the grey water from the grey water treatment section returns to the gasification system 22 for recycling, and lower-layer base material is conveyed to a slurry stirring and deflocculating pretreatment unit through a pipeline for stirring and adding a deflocculant to release water, suspended particles and the like from the floccule; liquid enters a flotation unit from a slurry stirring and deflocculation pretreatment unit, a flotation agent and a foaming agent are added into the flotation unit, fine coal powder is wrapped by foam under the action of the foaming agent and the flotation agent and then enters a defoaming device 9 through an upper overflow pipeline of the flotation unit for defoaming treatment, the fine coal powder enters a coal powder thickening tank 13 after defoaming treatment, sedimentation of the coal powder in water realizes layering treatment, liquid-solid separation is carried out on lower bed charge in the coal powder thickening tank 13 through a coal powder diaphragm filter pressing device 12, solid phase is coal powder, and the coal powder enters a coal powder bin 14 through a solid phase outlet of the coal powder diaphragm filter pressing device 12 for reutilization.
A carbon extraction process of a coal gasification fine ash carbon extraction device comprises the following steps:
the method comprises the following steps: under the clarification and separation action of the clarifying tank 1, the supernatant liquid of the grey water from the grey water treatment section returns to the gasification system 22, and the bottom layer base material is conveyed into the slurry buffer tank 2 through a pipeline; the solid content of the lower layer bottom material is 5-10%;
step two: the lower-layer backing material enters the tank body from the side part of the slurry buffer tank 2, the slurry concentration is uniformly distributed under the action of the stirrer 3, and the slurry with uniform concentration enters the slurry pretreatment device 5 under the action of the slurry pump 4; after entering a slurry pretreatment device 5, slurry with uniform concentration is added with a deflocculant drug through a deflocculant adding pipeline 8 until the slurry concentration is 40-80 g/L;
step three: enabling the slurry with the concentration of 40-80g/L in the second step to enter a flotation unit, adding a flotation agent into a flotation device 7 through a flotation agent adding passage 23, adding a foaming agent through a foaming agent adding passage 24, sending air into the flotation device 7 through a flotation pipeline 20 through an aeration fan 6, starting a flotation machine 25, enabling fine coal powder to enter a defoaming device 9 through an upper overflow pipeline of the flotation unit for defoaming treatment after being wrapped by foams under the action of the foaming agent and the flotation agent;
step four: when the granularity of the gasified fine slag is fine, a multi-stage flotation device 7 is adopted, and the upper-layer flotation device 7 is used for floating large-particle coal powder and sending the large-particle coal powder to a defoaming device 9 in a foam mode; small-particle coal dust and ash content enter a lower layer flotation device 7 along with a flotation solution, the lower layer flotation device 7 is used for floating the small-particle coal dust, a foaming agent is added into the lower layer flotation device 7 through a foaming agent adding channel 24, air is sent into the lower layer flotation device 7 through a flotation pipeline 20 through an aeration fan 6, a flotation machine 25 in the lower layer flotation device 7 is started, and the small-particle coal dust enters a defoaming device 9 through an upper overflow pipeline of a flotation unit for defoaming treatment after being wrapped by foam under the action of the foaming agent and the flotation agent;
step five: the foam wrapping the coal dust in the third step and the fourth step enters a defoaming device 9, is broken under the action of a defoaming agent, the broken material enters a coal dust thickening tank 13, the coal dust is settled in water and layered treatment is realized, a lower-layer bed charge in the coal dust thickening tank 13 is subjected to liquid-solid separation through a coal dust diaphragm filter pressing device 12, the solid phase is the coal dust, and the coal dust enters a coal dust bin 14 through a solid phase outlet of the coal dust diaphragm filter pressing device 12 to be reused;
step six: the solution passing through the flotation unit enters the coal ash thickening tank 10 through a bottom discharge hole in the third step and the fourth step, ash is settled in the solution and layered treatment is realized, the lower-layer bottom material in the coal ash thickening tank 10 enters the coal ash diaphragm filter pressing device 11 to realize solid-liquid separation, the solid phase is ash, and the ash enters the ash bin 16 through a solid phase outlet of the coal ash diaphragm filter pressing device 11 for sale;
step seven: supernatant on the upper part of the coal ash thickening tank 10, supernatant on the upper part of the coal ash thickening tank 13, liquid phase of the coal ash diaphragm filter pressing device 11 and liquid phase of the coal ash diaphragm filter pressing device 12 respectively enter the oil separation tank 17 through a top inlet of the oil separation tank 17 and are separated in the oil separation tank 17, and oily medicament of the supernatant enters the oily medicament recovery tank 15 of the supernatant for recycling;
step eight: and the waste liquid at the lower part of the middle oil tank 17 in the step seven is subjected to advanced oxidation treatment by a biochemical reaction tank 18, enters an aeration treatment reaction tank 19 for aeration treatment, and is discharged through a discharge pipeline 21 after being qualified through the aeration treatment.
The deflocculant in the second step is mainly electrolyte substances, and the deflocculant is any one of sodium citrate, dextran sulfate, phosphate, carbonate and glycinate; the flocculating agent breaking device has the flocculating function of destroying the flocculating agent, so that a flocculating group structure formed by adding the flocculating agent into the clarifying tank 1 is broken, and water, suspended particles and the like are released from a flocculating body; in the third step, the flotation agent is diesel oil, and the addition proportion of the flotation agent is 4.0Kg/t-8.0 Kg/t; the foaming agent is secondary octanol, and the addition proportion is 1.5Kg/t-3.5 Kg/t; the air pressure in the flotation pipeline 20 is 40-60 KPa; the rotation speed of the flotation machine 25 is: 1500-1900 r/min; in the fourth step, the foaming agent in the lower layer flotation device 7 is secondary octanol, and the addition ratio is 1.5Kg/t-3.5 Kg/t; the air pressure in the flotation pipeline 20 is 40-60 KPa; the rotation speed of the flotation machine 25 in the layer flotation device 7 is: 1300-1800 r/min; in the fifth step, the defoaming agent is any one of emulsified silicone oil, a high-carbon alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether or polydimethylsiloxane; the water content of the coal powder subjected to solid-liquid separation by the coal powder diaphragm filter pressing device 12 is 20-30%; in the sixth step, the water content of the ash obtained by solid-liquid separation of the coal ash diaphragm filter pressing device 11 is 15-20%; in the step eight, the COD content of the waste liquid is 500-600Mg/l, and the pH value is as follows: 7.5-8.2; the COD content of the waste liquid in the discharge pipeline 21 is 500-600Mg/l, and the pH value is as follows: 7.5-8.2.
It is noted that in the device section herein, "first", "second", etc. are used only for distinguishing one from another, and do not indicate their importance, order, etc. In the description of the present invention, it is to be understood that the terms "the other end", "the one end" and the like indicate the orientation or the positional relationship based on the orientation or the positional relationship shown in the drawings, which are only for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or the element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may include, for example, a fixed connection, an integral connection, or a detachable connection; or communication between the interior of the two elements; they may be directly connected or indirectly connected through an intermediate, and those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.
Claims (7)
1. The utility model provides a carbon device is carried to coal gasification fine ash, the device link to each other its characterized in that with gasification system (22) through the supernatant fluid pipeline including gasification depositing reservoir (1), gasification depositing reservoir (1): the bottom of the gasification clarification tank (1) is connected with a flotation unit through a slurry stirring and deflocculation pretreatment unit, an upper overflow pipeline of the flotation unit is connected with a pulverized coal thickening tank (13) through a defoaming device (9), and a lower bed charge outlet at the bottom of the pulverized coal thickening tank (13) is connected with a pulverized coal bunker (14) through a solid phase outlet of a pulverized coal diaphragm filter pressing device (12).
2. The coal gasification fine ash carbon extraction device according to claim 1, characterized in that: the slurry stirring and deflocculating pretreatment unit comprises a slurry buffer tank (2) with a stirrer (3), and the bottom of the slurry buffer tank (2) is connected with a slurry pretreatment device (5) with a deflocculant adding pipeline (8) through a slurry pump (4); the feed inlet of the slurry buffer tank (2) is connected with the bottom bed material outlet of the gasification clarifying tank (1), and the middle supernatant pipeline outlet of the slurry pretreatment device (5) is connected with a flotation device (7) in a flotation unit.
3. The coal gasification fine ash carbon extraction device according to claim 1, characterized in that: the flotation unit comprises at least one flotation device (7),
when the device is a flotation device (7), a feed inlet of the flotation device (7) is connected with a supernatant pipeline outlet in the middle of the slurry pretreatment device (5), a flotation agent adding channel (23) and a foaming agent adding channel (24) are arranged at the top of the flotation device (7), an overflow pipeline at the upper part of the flotation device (7) is connected with a defoaming device (9), and a flotation machine (25) and a flotation pipeline (20) connected with an aeration fan (6) are arranged inside the flotation device (7); a discharge port at the bottom of the flotation device (7) is connected with a fine ash collecting unit, a medicament recycling unit and a wastewater treatment unit;
when a plurality of flotation devices (7) are arranged, the flotation devices (7) are connected in series, a feed inlet of an upper layer flotation device (7) is connected with a supernatant pipeline outlet in the middle of a slurry pretreatment device (5), a flotation agent adding channel (23) and a foaming agent adding channel (24) are arranged at the top of the upper layer flotation device (7), a foaming agent adding channel is arranged at the top of the flotation device (7) except the upper layer flotation device (7), upper overflow pipelines of the flotation devices (7) are respectively connected with a defoaming device (9), an aeration fan (6) is respectively connected with flotation pipelines (20) in the flotation devices (7) through pipelines, flotation machines (25) are respectively arranged in the flotation devices (7), a bottom discharge outlet of the bottom flotation device (7) is connected with a fine ash collecting unit, the drug recovery unit is connected with the wastewater treatment unit.
4. The coal gasification fine ash carbon extraction device according to claim 3, characterized in that: the number of the flotation devices (7) is two.
5. The coal gasification fine ash carbon extraction device according to claim 3, characterized in that: the fine ash collecting unit comprises a coal ash dense pool (10) connected with a bottom discharge hole of the flotation device (7), a bottom layer bottom material outlet at the bottom of the coal ash dense pool (10) is connected with a coal ash diaphragm filter pressing device (11), and a solid material outlet of the coal ash diaphragm filter pressing device (11) is connected with an ash bin (16).
6. The coal gasification fine ash carbon extraction device according to claim 3, characterized in that: the drug recovery unit comprises an oil separation tank (17), and the upper part of the oil separation tank (17) is connected with a supernatant oily drug recovery tank (15) through a pipeline; the lower outlet of the oil separating tank (17) is connected with the wastewater treatment unit, and the top inlet of the oil separating tank (17) is respectively connected with the supernatant outlet at the upper part of the coal ash thickening tank (10), the supernatant outlet at the upper part of the coal ash thickening tank (13), the liquid phase outlet of the coal ash diaphragm filter pressing device (11) and the liquid phase outlet of the coal ash diaphragm filter pressing device (12).
7. The coal gasification fine ash carbon extraction device according to claim 6, characterized in that: the wastewater treatment unit comprises a biochemical reaction tank (18) connected with the lower outlet of the oil separation tank (17), and the biochemical reaction tank (18) is connected with an external discharge pipeline (21) through an aeration treatment reaction tank (19).
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| CN109749784A (en) * | 2019-01-31 | 2019-05-14 | 河南心连心化肥有限公司 | A kind of coal gasification fine ash mentions carbon device and proposes carbon technique |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109749784A (en) * | 2019-01-31 | 2019-05-14 | 河南心连心化肥有限公司 | A kind of coal gasification fine ash mentions carbon device and proposes carbon technique |
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