CN114735959B - Decarburization treatment process method of coal gasification fine slag and application thereof - Google Patents
Decarburization treatment process method of coal gasification fine slag and application thereof Download PDFInfo
- Publication number
- CN114735959B CN114735959B CN202210311449.4A CN202210311449A CN114735959B CN 114735959 B CN114735959 B CN 114735959B CN 202210311449 A CN202210311449 A CN 202210311449A CN 114735959 B CN114735959 B CN 114735959B
- Authority
- CN
- China
- Prior art keywords
- catalytic
- coal gasification
- fine slag
- conversion
- gasification fine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- 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
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention provides a decarburization treatment process method of coal gasification fine slag and application thereof, belonging to the technical field of industrial waste slag resource utilization. According to the invention, through optimizing the decarburization process, the coal gasification fine slag is decarburized by self energy under the action of the conversion catalyst without adding any coal heat, and is converted into the fly ash (building material) so as to be convenient to use, so that the method has good practical application, and particularly has the value of large-scale industrialization and industrialization application.
Description
Technical Field
The invention belongs to the technical field of industrial waste residue resource utilization, and particularly relates to a decarburization treatment process method of coal gasification fine slag and application thereof.
Background
The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.
The gasified fine slag (also called gasified coal slime or gasified filter cake) is fine slag generated in the process of coal gasification production, incomplete fine coal particles and fine ash are converted after high-temperature combustion and reaction in a gasification furnace, the fine coal particles are somewhat similar to semicoke, the gasified fine slag generally contains 25-60% of water, a certain amount of glass colloid, is sticky and free of volatile matters, the residual carbon content is 16-28% (dry basis), and the low calorific value of the gasified fine slag is 500-1800kcal/kg.
The production of gasification fine slag is increased year by year along with the scale expansion and upgrading of the gasification industry, the new production of gasification fine slag exceeds billions of tons each year, the large quantity of gasification fine slag is low in current utilization rate, and the gasification fine slag can only be stored by building a dam, occupies a large amount of land and permeates and pollutes underground water, so that a great dangerous pollution source is formed; the dried fine powder flies upwards with wind to pollute the atmosphere; the phenomena of rain scouring, infiltration and harmful substance diffusion in rainy seasons need to be solved.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a decarburization treatment process method of coal gasification fine slag and application thereof. According to the invention, the decarburization process of the coal gasification fine slag is optimized, and 2-3% of biomass oxygen-containing conversion catalyst is added, so that the coal gasification fine slag is rapidly decarburized, the coal gasification fine slag is decarburized by means of self energy and the conversion catalyst on the premise of not adding any coal carbon heat, and is converted into the fly ash (building material) so as to be convenient to use, and therefore, the method has good practical application, and particularly has the value of large-scale industrialization and industrialization application.
In order to achieve the above object, the present invention relates to the following technical solutions:
in a first aspect of the invention, there is provided a decarbonization treatment process for coal gasification fine slag, the process comprising: under the action of an oxygen-containing conversion catalyst, decarbonizing and converting coal gasification fine slag into fly ash under the condition of high temperature air distribution, and simultaneously releasing heat energy.
Wherein the water content of the gasified fine slag is controlled to be 25-60%, more preferably 30-35%, and the gasification fine slag is rapidly decarbonized and smoothly carried out under the action of an oxygen-containing conversion catalyst.
The high temperature environment is 700-980 ℃ (preferably 850-950 ℃), and the oxygen-enriched or polyoxin conversion catalyst is added in an amount of 2-3% (w/w).
Wherein the oxygen-enriched or polyoxin conversion catalyst is made of copper-containing base material;
the catalyst is prepared by the following steps:
dissolving copper acetate and 2,2' -bipyrimidine in an organic solvent, adding cordierite porous ceramic, uniformly mixing under heating, removing the organic solvent at high temperature, crushing the residual product, and performing high-temperature calcination treatment.
Wherein, the mol ratio of the copper acetate to the 2,2' -bipyrimidine is controlled to be 4-6: 1, preferably 5:1;
the organic solvent may be ethanol;
the mass ratio of the copper acetate to the cordierite porous ceramic is 0.1-3: 90-110, preferably 1:100;
the cordierite porous ceramic may be waste cordierite porous ceramic, thereby further reducing production and use costs;
the heating conditions may be as follows: stirring and mixing uniformly at 50-70deg.C;
the high temperature condition may be evaporation to remove the organic solvent at a temperature above the boiling point of the solvent (e.g., 80 ℃ and above); the removed organic solvent (ethanol) can be reused, thereby saving the cost.
The specific process of high-temperature calcination comprises the following steps: the temperature is raised to 800-900 deg.c, preferably 850 deg.c, at 3-5 deg.c/min, preferably 4 deg.c, for 1-3 hr.
The particle diameter of the oxygen-containing conversion catalyst is controlled to be not less than 1mm, preferably 2 to 5mm.
The oxygen-enriched or multi-oxygen conversion catalyst can effectively shorten the reaction time, has excellent thermal stability, can maintain the long-time catalytic activity (at least over 100 h) in the high-temperature combustion process, and has no obvious loss of copper metal, thereby greatly reducing the production cost.
The duration of the above-mentioned catalytic conversion decarbonization process may be 2-12 seconds, more preferably 5-8 seconds, so that the decarbonization process can be realized to convert solid carbon into gaseous phase CO 2 And discharging, so that the decarburization of the coal gasification fine slag is successful.
In a second aspect of the invention there is provided the use of the process described above in any one or more of the following:
1) Preparing fly ash, and generating steam as a byproduct;
2) Recycling/innocent treatment of coal gasification fine slag;
3) Reducing the solid waste of coal gasification fine slag (reducing rate is 60-80%).
The beneficial technical effects of one or more of the technical schemes are as follows:
the technical scheme provides a conversion catalytic decarbonization treatment process method for coal gasification fine slag for the first time, wherein coal gasification fine slag in coal chemical production is conveyed into a catalytic conversion device furnace, 2-3% of oxygen-containing conversion catalyst is added, carbon in the gasified fine slag is catalytically converted by ignition of heat storage materials in the furnace, and decarbonization process is successfully realized by uniform contact of high-temperature gas-solid phase, so that solid-phase carbon is converted into gas-phase CO 2 So that the coal gasification fine slag decarburization is successful. According to the technical scheme, on the premise of not adding any coal heat, the catalytic decarburization process is realized by means of the energy of coal gasification fine slag and the catalytic action of a catalyst, and the coal gasification fine slag is formedThe process of recycling the solid waste pollutants of the gasified fine slag generated in the industrial production process has good practical application, especially large-scale industrialization and industrialization application value.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention.
FIG. 1 is a schematic view of a decarburization unit (vertical) for coal gasification fine slag according to the present invention;
FIG. 2 is a schematic diagram of a decarburization unit (gate type) of the coal gasification fine slag according to the present invention;
wherein, 1-a heat accumulating catalytic ignition area; 2-an original starting heating port; 3-catalyst inlet; 4-mud feeding reamer; 5-catalytic conversion expansion zone; 6-an energy storage catalytic conversion zone; 7-a catalytic full conversion zone; the 8-outlet is connected with the boiler.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof. It is to be understood that the scope of the invention is not limited to the specific embodiments described below; it is also to be understood that the terminology used in the examples of the invention is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the invention.
As mentioned above, the production of gasification fine slag increases year by year along with the scale expansion and upgrading of the gasification industry, and the new production of gasification fine slag exceeds billions of tons each year, so that the large quantity of gasification fine slag is low in current utilization rate, and can only be stored by building a dam, occupies a large amount of land, permeates and pollutes underground water, and forms a great dangerous pollution source; the dried fine powder flies upwards with wind to pollute the atmosphere; the phenomena of rain scouring, infiltration and harmful substance diffusion in rainy seasons need to be solved.
Coal gasification fine slag sources, including various coal gasifiers: entrained-flow bed coal gasifier and fluidized bed coal gasifier; entrained-flow bed gasifiers are divided into two main types, namely a dry coal dust gasifier and a coal water slurry gasifier; coal gasifier type with dry coal powder as gasifying coal includes various gasifiers including space furnace, shell furnace, ning coal furnace, jin coal furnace, etc.; the furnace type which takes the coal water slurry as the raw material is a Texaco coal water slurry gasifier, a multi-nozzle coal water slurry gasifier and the like; a large amount of gasified fine slag (or gasified filter cake, also called gasified coal slurry) is produced.
Fluidized bed coal gasifier (containing an ented furnace) also contains a large amount of gasified slime in its aqueous bath flow path.
The gasification filter cake or gasification coal slurry is herein generically referred to as gasification fines.
In view of this, in an exemplary embodiment of the present invention, there is provided a decarburization process for coal gasification fine slag, the process comprising: the coal gasification fine slag is decarbonized and converted into fly ash at high temperature under the action of an oxygen-containing conversion catalyst, and meanwhile, heat energy is released.
In another specific embodiment of the invention, the water content of the gasified fine slag is controlled to be 25-60%, more preferably about 30-35%, and the gasification fine slag decarburization process is fast and smooth under the action of the oxygen-containing conversion catalyst.
The high temperature environment is 700-980 ℃ (preferably 850-950 ℃), and the oxygen-containing conversion catalyst is added in an amount of 2-3% (w/w).
Wherein the oxygen-enriched or polyoxin conversion catalyst is made of copper-containing base material;
the catalyst is prepared by the following steps:
dissolving copper acetate and 2,2' -bipyrimidine in an organic solvent, adding cordierite porous ceramic, uniformly mixing under heating, removing the organic solvent at high temperature, crushing the residual product, and performing high-temperature calcination treatment.
Wherein, the mol ratio of the copper acetate to the 2,2' -bipyrimidine is controlled to be 4-6: 1, preferably 5:1;
the organic solvent may be ethanol;
the mass ratio of the copper acetate to the cordierite porous ceramic is 0.1-3: 90-110, preferably 1:100;
the cordierite porous ceramic may be waste cordierite porous ceramic, thereby further reducing production and use costs;
the heating conditions may be as follows: stirring and mixing uniformly at 50-70deg.C;
the high temperature condition may be evaporation to remove the organic solvent at a temperature above the boiling point of the solvent (e.g., 80 ℃ and above); the removed organic solvent (ethanol) can be reused, thereby saving the cost.
The specific process of high-temperature calcination comprises the following steps: the temperature is raised to 800-900 deg.c, preferably 850 deg.c, at 3-5 deg.c/min, preferably 4 deg.c, for 1-3 hr.
The particle diameter of the oxygen-containing conversion catalyst is controlled to be not less than 1mm, preferably 2 to 5mm.
The oxygen-enriched or multi-oxygen conversion catalyst can effectively shorten the reaction time, has excellent thermal stability, and can maintain long-time catalytic activity in the high-temperature combustion process, thereby reducing the production cost.
The duration of the catalytic conversion process may be 2-12 seconds, more preferably 5-8 seconds, so that the decarbonization process is achieved to convert solid carbon into gaseous CO 2 And discharging, so that the decarburization of the coal gasification fine slag is successful.
It should be noted that even if the above catalyst is not used, the fine coal gasification slag can be decarburized and converted into fly ash (building material) at a high temperature, and therefore, it is also within the scope of the present invention to perform the above reaction process without using the catalyst.
In yet another embodiment of the present invention, the decarbonization process can be performed in a catalytic conversion unit:
the catalytic conversion device can be a catalytic converter, the catalytic converter is of a vertical structure and comprises the following components in sequence from bottom to top: the device comprises a heat accumulating catalytic ignition area, a catalytic conversion expansion area, an energy accumulating catalytic conversion area and a catalytic full conversion area;
the heat-accumulating catalytic ignition area is subjected to catalytic decarburization by heat transfer ignition of gasified slag under the action of a conversion catalyst through wind disturbance, and more specifically, a high-temperature air chamber is arranged below the heat-accumulating catalytic ignition area, the high-temperature air chamber releases high-temperature air (high-temperature oxygen-containing gas or high-temperature oxygen-enriched air) at 100-600 ℃, and the high-temperature air (high-temperature oxygen-containing gas or high-temperature oxygen-enriched air) moves from bottom to top, so that high-temperature air is provided for the heat-accumulating catalytic ignition area and other areas, wind power support is provided for the gasified slag, and the gasified slag can move upwards in the device, so that the gasified slag enters the areas. It should be noted that, the direct addition of biomass fuel, or other combustion-supporting fuels (such as diesel, natural gas, methanol, coal dust, coal or coal water slurry, and other fuels) also falls into the protection scope of the present invention.
Although the above-described catalytic converter is exemplified by a vertical type structure (see fig. 1), the catalytic converter may be used to recover heat from a boiler including, but not limited to, a door type (see fig. 2), a horizontal type, or other types, as long as the decarburization function of the gasified fine slag can be achieved. Meanwhile, even in the vertical structure, the mode of reducing or not reducing from bottom to top, or the mode of rounding or square rounding and the like is also suitable for the invention, and therefore, the invention also belongs to the protection scope of the application.
The heat accumulating catalytic ignition area is made of any one or more of quartz sand, flint clay and fluidized bed boiler slag;
the catalytic conversion expansion zone is used for expanding the area as soon as possible and reducing the floating speed of coal gasification fine slag;
the heat accumulating catalytic conversion area is used for reserving limited conversion heat of coal gasification fine slag in the hearth, so that the heat accumulating catalytic conversion area performs heat accumulating and preserving treatment, and therefore, the existing known heat accumulating modes are all within the protection scope of the invention, such as using heat accumulating lattice bricks, a plurality of heat accumulating arch shapes side by side, a plurality of heat accumulating columns and the like, and more particularly, the wall bricks on the inner side of the furnace wall in the area adopt special-shaped heat accumulating type high-alumina bricks, so that heat loss and heat removal are prevented or reduced.
The catalytic full conversion zone is used for further converting a small amount of carbon in the coal gasification fine slag entering the zone thoroughly. In the present invention, the conversion time of coal gasification fine slag is 3-8 seconds before entering the catalytic full conversion zone, and the conversion rate is 70-80%. So as to enter the area and further convert the coal gasification fine slag to obtain the fly ash (building material) product.
In order to facilitate the transportation of the gasified fine slag into the catalytic conversion device, a gasified fine slag transportation mechanism is arranged between the heat accumulating catalytic ignition area and the catalytic conversion expansion area, the gasified fine slag transportation mechanism is used for transporting the external gasified fine slag into the catalytic conversion device, and preferably, the transportation mechanism can be a reamer type transportation mechanism. The position of the input port of the coal gasification fine slag conveying mechanism is not particularly limited, and can be determined according to the overall specification of the catalytic converter, and particularly, the position of the input port can be opened 3-18m upwards from the bottom end.
In a further embodiment of the invention, a reformed gas outlet is provided in the upper part of the catalytic full reforming zone for discharging the reformed gas into a heat recovery device or a waste heat boiler.
In order to ensure that the reaction proceeds sufficiently, the particle size of the coal gasification fine slag is not more than 1mm, more preferably 250 to 500. Mu.m. The particle size of the coal gasification fine slag is controlled, so that the full mixing of the later stage and hot flow gas is facilitated, and the reaction is promoted.
In yet another embodiment of the present invention, there is provided the use of the above process in any one or more of the following:
1) Preparing fly ash, and generating steam as a byproduct;
2) Recycling/innocent treatment of coal gasification fine slag;
3) And (5) reducing solid waste of coal gasification fine slag.
The invention is further illustrated by the following examples, which are not to be construed as limiting the invention. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention.
Example 1
A decarbonization treatment process of coal gasification fine slag, the process comprising: the coal gasification fine slag is decarbonized and converted into fly ash under the condition of adding 3% of oxygen-containing conversion catalyst, and simultaneously, heat energy is released.
The water content of the coal gasification fine slag is controlled to be about 30-35%, and the grain size of the coal gasification fine slag is 250-500 mu m.
The high temperature environment is 900-950 ℃.
The decarburization treatment process method is carried out in a catalytic conversion device:
the catalytic conversion device can be a catalytic converter, the catalytic converter is of a vertical structure and comprises the following components in sequence from bottom to top: the device comprises a heat accumulating catalytic ignition area, a catalytic conversion expansion area, an energy accumulating catalytic conversion area and a catalytic full conversion area;
the heat-accumulating catalytic ignition area is subjected to heat transfer ignition and gasification fine slag decarburization under the action of a conversion catalyst through wind disturbance, and more specifically, a high-temperature air chamber is arranged below the heat-accumulating catalytic ignition area and releases high-temperature air at about 500-600 ℃, the high-temperature air moves from bottom to top, so that high-temperature air is provided for the heat-accumulating catalytic ignition area and other areas, wind power support is provided for the coal gasification fine slag, and the coal gasification fine slag can move upwards in the device, so that the coal gasification fine slag enters the areas.
The heat accumulating catalytic ignition area is made of quartz sand.
The catalytic conversion expansion zone is used for expanding the area as soon as possible and reducing the floating speed of coal gasification fine slag;
the energy storage catalytic conversion zone is used for reserving limited conversion heat of coal gasification fine slag in the hearth, so that the energy storage catalytic conversion zone is used for heat storage and heat preservation treatment, and special-shaped heat storage type high-alumina bricks are adopted as wall bricks on the inner side of the furnace wall in the area, so that heat is prevented or reduced and taken away.
The catalytic full conversion zone is used for further converting a small amount of carbon in the coal gasification fine slag entering the zone thoroughly. In this example, the conversion time of the coal gasification fines was up to about 4 seconds and the conversion was up to about 80% prior to entering the catalytic full conversion zone. So that the coal gasification fine slag enters the area, further decarburization is carried out, and the complete conversion of the coal gasification fine slag is realized, so that the fly ash (building material) product is obtained.
In order to facilitate the transportation of coal gasification fine slag (mixed with oxygen-containing conversion catalyst) into the catalytic conversion device, a coal gasification fine slag transportation mechanism is arranged between the heat accumulating catalytic ignition area and the catalytic conversion expansion area, and the transportation mechanism is a reamer type transportation mechanism.
And a converted gas outlet is arranged at the upper part of the catalytic full conversion zone, so that the converted gas is discharged and enters a waste heat recovery device to recover heat.
The preparation method of the oxygen-containing conversion catalyst comprises the following steps: putting copper acetate and 2,2' -bipyrimidine in ethanol according to a molar ratio of 5:1, adding cordierite porous ceramic (the mass of which is 100 times that of copper acetate), uniformly mixing at 60 ℃, removing ethanol at 80 ℃, crushing the residual product, and performing high-temperature calcination treatment. The specific process of high-temperature calcination comprises the following steps: the temperature was raised to 850℃at a rate of 4℃for 2 hours. Controlling the particle size of the oxygen-containing conversion catalyst to be 2-5mm.
Example 2
A decarbonization treatment process of coal gasification fine slag, the process comprising: the coal gasification fine slag is decarbonized and converted into fly ash at high temperature under the action of an oxygen-containing conversion catalyst, and meanwhile, heat energy is released.
The water content of the coal gasification fine slag is controlled to be about 30-35%, and the grain size of the coal gasification fine slag is 300-800 mu m. .
The high temperature environment is 900-950 ℃, and 2% of oxygen-containing conversion catalyst is added.
The decarburization process may be carried out in a catalytic converter:
the catalytic conversion device can be a catalytic converter, the catalytic converter is of a vertical structure and comprises the following components in sequence from bottom to top: the device comprises a heat accumulating catalytic ignition area, a catalytic conversion expansion area, an energy accumulating catalytic conversion area and a catalytic full conversion area;
the high-temperature air chamber is arranged below the heat-accumulating catalytic ignition area and releases high-temperature air at about 500-600 ℃ and moves from bottom to top under the action of a conversion catalyst through wind disturbance, so that high-temperature air is provided for the heat-accumulating catalytic ignition area and the like, wind power support is provided for coal gasification slag, and coal gasification slag can move upwards in the device and enter the areas.
The heat accumulating catalytic ignition area is made of flint clay.
The catalytic conversion expansion zone is used for expanding the area as soon as possible and reducing the floating speed of coal gasification fine slag;
the energy storage catalytic conversion zone is used for reserving limited conversion heat of coal gasification fine slag in the hearth, so that the energy storage catalytic conversion zone is subjected to heat storage and heat preservation treatment, and more particularly, the special-shaped heat storage type high-alumina bricks are adopted as the wall bricks on the inner side of the furnace wall in the area, so that heat loss and removal are prevented or reduced.
The catalytic full conversion zone is used for further converting a small amount of carbon in the coal gasification fine slag entering the zone thoroughly. In this example, the conversion time of the coal gasification fines was up to 5 seconds and the conversion was up to about 75% before entering the catalytic full conversion zone. So as to enter the area and be further oxidized to realize the complete conversion of coal gasification fine slag, thus obtaining the fly ash product.
In order to facilitate the transportation of coal gasification fine slag (mixed with oxygen-containing conversion catalyst) into the catalytic conversion device, a coal gasification fine slag transportation mechanism is arranged between the heat accumulating catalytic ignition area and the catalytic conversion expansion area, and the transportation mechanism is a reamer type transportation mechanism.
And a converted gas outlet is arranged at the upper part of the catalytic full conversion zone, so that the converted gas is discharged and enters the waste heat boiler to recover heat.
Wherein the oxygen-containing conversion catalyst was prepared in the same manner as in example 1.
Example 3
A decarbonization treatment process of coal gasification fine slag, the process comprising: the coal gasification fine slag is decarbonized and converted into fly ash under the action of an oxygen-containing conversion catalyst, and meanwhile, heat energy is released.
The water content of the coal gasification fine slag is controlled to be about 30-35%, and the grain size of the coal gasification fine slag is 1mm.
The high temperature environment is 800-850 ℃, and 2% of oxygen-containing conversion catalyst is added.
The decarburization process may be carried out in a catalytic converter:
the catalytic conversion device can be a catalytic converter, the catalytic converter is of a vertical structure and comprises the following components in sequence from bottom to top: the device comprises a heat accumulating catalytic ignition area, a catalytic conversion expansion area, an energy accumulating catalytic conversion area and a catalytic full conversion area;
the heat accumulating catalytic ignition area is subjected to heat transfer ignition, catalytic decarburization and more specifically a high-temperature air chamber is arranged below the heat accumulating catalytic ignition area under the action of a conversion catalyst, the high-temperature air chamber releases high-temperature air at 300-400 ℃, the high-temperature air moves from bottom to top, so that high-temperature air is provided for the heat accumulating catalytic ignition area and the like, wind power support is provided for coal gasification slag, and coal gasification slag can move upwards in the device, so that coal gasification slag enters the areas.
The heat accumulating catalytic ignition area can be made of fluidized bed boiler slag.
The catalytic conversion expansion zone is used for expanding the area as soon as possible and reducing the floating speed of coal gasification fine slag.
The energy storage catalytic conversion zone is used for reserving limited conversion heat of coal gasification fine slag in the hearth, so that the energy storage catalytic conversion zone is subjected to heat storage and heat preservation treatment, and more particularly, the special-shaped heat storage type high-alumina bricks are adopted as the wall bricks on the inner side of the furnace wall in the area, so that heat loss and removal are prevented or reduced.
The catalytic full conversion zone is used for further converting a small amount of carbon in the coal gasification fine slag entering the zone thoroughly. In this example, the conversion time of the coal gasification fines was up to 6 seconds and the conversion was 80% before entering the catalytic full conversion zone. So as to enter the area and be further oxidized to realize the complete conversion of coal gasification fine slag, thus obtaining the fly ash product.
In order to facilitate the transportation of coal gasification fine slag (mixed with oxygen-containing conversion catalyst) into the catalytic conversion device, a coal gasification fine slag transportation mechanism is arranged between the heat accumulating catalytic ignition area and the catalytic conversion expansion area, and the transportation mechanism is a reamer type transportation mechanism.
And a converted gas outlet is arranged at the upper part of the catalytic full conversion zone, so that the converted gas is discharged and enters the waste heat boiler to recover heat.
Wherein the oxygen-containing conversion catalyst was prepared in the same manner as in example 1.
It should be noted that the above examples are only for illustrating the technical solution of the present invention and are not limiting thereof. Although the present invention has been described in detail with reference to the examples given, those skilled in the art can make modifications and equivalents to the technical solutions of the present invention as required, without departing from the spirit and scope of the technical solutions of the present invention.
Claims (16)
1. A decarburization treatment process method for coal gasification fine slag, which is characterized by comprising the following steps: decarburizing and converting coal gasification fine slag into fly ash under the action of an oxygen-containing conversion catalyst at a high temperature environment, and simultaneously releasing heat energy; the high-temperature environment is 800-950 ℃, and oxygen-containing conversion catalyst accounting for 2-3% of the weight of coal gasification fine slag is uniformly added; the oxygen-containing conversion catalyst is made of copper-containing base material; the preparation method of the oxygen-containing conversion catalyst comprises the following steps: dissolving copper acetate and 2,2' -bipyrimidine in an organic solvent, adding cordierite porous ceramic into the organic solvent, uniformly mixing the mixture under a heating condition, removing the organic solvent at a high temperature, crushing a residual product, and performing high-temperature calcination treatment; the molar ratio of the copper acetate to the 2,2' -bipyrimidine is controlled to be 5:1; the organic solvent is ethanol; the mass ratio of the copper acetate to the cordierite porous ceramic is 0.1-3: 90-110; the heating conditions are as follows: stirring and mixing uniformly at 50-70deg.C; the high temperature condition is that the organic solvent is removed by evaporation at the temperature of 80 ℃ or above; the specific process of high-temperature calcination comprises the following steps: heating to 800-900 ℃ at 3-5 ℃/min for 1-3 hours; the particle size of the oxygen-containing conversion catalyst is controlled to be 2-5mm; the duration of the catalytic conversion process is 2-12 seconds.
2. The decarburization process of claim 1, wherein the high temperature calcination process is as follows: heating to 850 ℃ at 4 ℃/min for 1-3 hours; the duration of the catalytic conversion process is 5-8 seconds.
3. The decarburization process of claim 1, wherein the moisture content of the gasified fine slag is controlled to be 30 to 35%; or the particle size of the coal gasification fine slag is not more than 1mm.
4. The decarburization process of claim 3, wherein the coal gasification fine slag has a particle size of 250 to 500. Mu.m.
5. The decarburization process of claim 1, wherein the decarburization process is carried out in a catalytic converter.
6. The decarburization process of claim 5, wherein the catalytic converter is a catalytic converter, and the catalytic converter is a vertical structure comprising, in order from bottom to top: the device comprises a heat accumulating catalytic ignition area, a catalytic conversion expansion area, an energy accumulating catalytic conversion area and a catalytic full conversion area.
7. The decarburization process of claim 6, wherein the thermally regenerative catalytic pilot zone initiates the catalytic decarburization by wind turbulence heat transfer.
8. The decarburization process of claim 7, wherein a hot plenum is provided below the thermally regenerative catalytic pilot zone, wherein the hot plenum releases hot air at a temperature of between 100 ℃ and 600 ℃, and wherein the hot air moves from bottom to top.
9. The decarburization process of claim 8, wherein the thermally accumulating catalytic pilot zone is selected from the group consisting of any one or more of silica sand, flint clay and fluidized bed boiler slag.
10. The decarburization process of claim 8, wherein the high temperature air is a high temperature oxygen containing gas or a high temperature oxygen enriched air.
11. The decarburization process of claim 6, wherein the energy accumulating catalytic conversion zone is adapted to retain the limited heat of conversion of the coal gasification fines within the furnace such that the energy accumulating catalytic conversion zone is heat accumulating and retaining.
12. The decarburization process according to claim 11, wherein the inner wall bricks of the furnace wall in the region are shaped heat accumulating type high alumina bricks.
13. The decarburization process of claim 6, wherein a coal gasification fine slag conveyor is provided between the thermally regenerative catalytic pilot zone and the catalytic converter expansion zone, wherein the coal gasification fine slag conveyor is configured to convey the external coal gasification fine slag to the catalytic converter.
14. The decarburization process of claim 13, wherein the transfer mechanism is a reamer transfer mechanism.
15. The decarburization process of claim 6, wherein a reformed gas outlet is provided at an upper portion of said catalytic full reforming zone for facilitating recovery of heat from the exhaust heat boiler.
16. Use of the process of any one of claims 1 to 15 in any one or more of the following: 1) Preparing fly ash, and generating steam as a byproduct; 2) Recycling/innocent treatment of coal gasification fine slag; 3) And (5) reducing solid waste of coal gasification fine slag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210311449.4A CN114735959B (en) | 2022-03-28 | 2022-03-28 | Decarburization treatment process method of coal gasification fine slag and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210311449.4A CN114735959B (en) | 2022-03-28 | 2022-03-28 | Decarburization treatment process method of coal gasification fine slag and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114735959A CN114735959A (en) | 2022-07-12 |
| CN114735959B true CN114735959B (en) | 2023-05-05 |
Family
ID=82276304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210311449.4A Active CN114735959B (en) | 2022-03-28 | 2022-03-28 | Decarburization treatment process method of coal gasification fine slag and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114735959B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7824574B2 (en) * | 2006-09-21 | 2010-11-02 | Eltron Research & Development | Cyclic catalytic upgrading of chemical species using metal oxide materials |
| US20090165361A1 (en) * | 2007-12-28 | 2009-07-02 | Greatpoint Energy, Inc. | Carbonaceous Fuels and Processes for Making and Using Them |
| CN113732007B (en) * | 2021-07-30 | 2023-01-31 | 华东理工大学 | Recycling method of coal gasification fine slag |
-
2022
- 2022-03-28 CN CN202210311449.4A patent/CN114735959B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN114735959A (en) | 2022-07-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7077878B1 (en) | Method for gasifying organic materials and mixtures of materials | |
| CN102010728B (en) | Method for preparing semicoke, empyreumatic oil and coal gas by pyrolyzing coal | |
| CN101220299B (en) | Device and method for production synthesis gas energy conservation and emission reduction of static bed gas making furnace | |
| US20220236009A1 (en) | Kiln system and method for firing ceramsite and by-producing waste heat by utilizing raw materials with heating values | |
| CN102322630A (en) | The macromolecular substances high-efficiency cleaning uses method and device | |
| CN110094722B (en) | Fluidized bed oxygen carrier assisted oxygen-enriched combustion system and method | |
| CN111498806A (en) | Method for preparing high-purity hydrogen from biomass and system adopted by method | |
| CN111621612B (en) | Converter tail gas waste heat carbonization coal pyrolysis coal gas preheating steelmaking system and steelmaking method | |
| CN107023837A (en) | Processing method for application of city life garbage | |
| CN209307184U (en) | Solid waste high-temperature plasma gasification power generation system | |
| CN109735369A (en) | A kind of petroleum coke chemical chain gasification produces the device and method of sulphur | |
| CN114735959B (en) | Decarburization treatment process method of coal gasification fine slag and application thereof | |
| CN205170774U (en) | Mud schizolysis gasification equipment | |
| CN1810929A (en) | Coal gas-recovering economizing clean coking process | |
| CN114314508B (en) | Poly-generation method and system for coupling biomass baking and chemical chain conversion | |
| CN108504396A (en) | A kind of biomass segmented gasification process and its special equipment | |
| CN205690388U (en) | A kind of high volatile carbon-containing fuel hot efflorescence high efficient combustion device | |
| CN212581819U (en) | Coal gasification slag plasma gasification cogeneration system | |
| JP4108886B2 (en) | Method for reducing nitrogen oxides in cement raw material firing equipment | |
| CN207316917U (en) | A kind of microwave radiation technology pyrolysis gasification furnace | |
| CN207688142U (en) | A kind of application clout processing equipment | |
| CN206266226U (en) | For rotary hearth furnace system prepared by active carbon from coal | |
| CN201232055Y (en) | Pressurized entrained-bed gasifying device for high ash fusion temperature coal | |
| CN114874815B (en) | Device and method for preparing high-quality synthetic gas by gasifying high-water-content Chinese medicinal residues | |
| CN202107674U (en) | Coal gasifying device for suspension bed |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |