CN114620726B - CO-production of high purity CO by calcination of small particle carbonate ore 2 Reactor and method thereof - Google Patents
CO-production of high purity CO by calcination of small particle carbonate ore 2 Reactor and method thereof Download PDFInfo
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Abstract
A reactor for CO-producing high-purity CO2 by calcining small-particle carbonate ore comprises an ore feed inlet, a moving bed reactor, a central gas collecting cavity, a gas product outlet, a solid product outlet, an air inlet, a clean gas inlet, a flue gas outlet, a combustion chamber, a discharge device and a heat transfer wall. The process comprises feeding small-particle carbonate ore at the top of a moving bed reactor, providing heat required by calcination by combustion of fuel gas and air in a combustion chamber, and transferring the heat into the moving bed reactor through a heat transfer wall; the gas transversely passes through the bed layer and is discharged through a gas product outlet of the central gas collecting cavity, and the gas is cooled and then dedusted and purified to obtain high-purity CO2; the solid metal oxide is discharged from the bottom of the moving bed reactor, and is cooled and collected together with the dust removal and separation of the gas product. The invention realizes the high-efficiency and low-energy-consumption calcination of the small-particle ore, and coproduces the solid metal oxide and the high-purity CO2. Solves the problems of difficult utilization of small-particle ores and low purity of CO2 in gas.
Description
Technical Field
The invention relates to a CO-production high-purity CO 2 Reactor and method thereof, in particular to a CO-production high-purity CO by calcining small-particle carbonate ore 2 A reactor and a method thereof.
Background
Carbonate ores are widely distributed, and the theoretical components are compounds consisting of metal cations and carbonate ions. Currently, more than 100 carbonate ores have been found, commonly including magnesite MgCO 3 CaCO of calcite 3 Dolomite CaMg (CO) 3 ) 2 ZnCO of siderite 3 Siderite FeCO 3 Rhodochrosite MnCO 3 CoCO of skutterudite 3 Etc. In general, the calcination process of carbonate ore is the first step in the resource utilization of the carbonate ore, and is widely applied to various fields such as chemical industry, metallurgy, construction and the like.
Production of solid metal oxides and gaseous CO from carbonate ore by calcination 2 Wherein the solid metal oxide can be widely applied to various fields such as chemical manufacturing, building material industry, paper industry, food processing, agricultural production and the like; CO 2 As a high-quality raw material with higher application value, the modified starch has application examples in the fields of petroleum exploitation, agricultural fertilizer preparation, medical aid, artificial rainfall, chemical synthesis, food production and the like, and has good development prospect. In the traditional ore calcination process, hot flue gas generated by fuel combustion is generally used as a heat source to directly heat the ore, so that the product CO 2 The gas is mixed with a large amount of flue gas and contains trace SO 2 、NO x And a large amount of dust, such that CO 2 The separation difficulty is high and the cost is high. Therefore, the gas product is directly discharged into the atmosphere through simple treatment, which causes resource waste and carbon emission problems. Thus, calcination of carbonate ore produces CO-produced high purity CO 2 Has important research significance and application value.
Currently, there are many kinds of large-scale carbonate ore calcination apparatuses, such as reverberatory furnaces, shaft kilns, suspension furnaces, rotary kilns, and the like. The reverberatory furnace and the shaft kiln are used as common calcining devices, are suitable for massive materials with larger grain sizes, are difficult to process small-grain ores and floatation mineral powder, and as the Chinese patent ZL201110049511.9 proposes a heat selecting method and a heat selecting device for light-burned magnesia, the materials with the grain sizes of 60-300 mm are calcined in the reverberatory kiln, solid products are conveyed to a heat selecting sieve for grain size classification, enter a heat pipe heat exchanger with the grain size of less than 40mm, exchange heat with cold air, recycle hot air as combustion air, and the cooled products are processed and then put in storage; for example, chinese patent ZL201310371812.2 proposes an internal combustion vertical kiln and a method for producing light burned magnesia, in which 30-80 mm of material is taken, dried and preheated by hot flue gas in a preheating section, then calcined in a calcining section, and then enters a cooling section downwards to exchange heat with the introduced countercurrent air, and the cooled material is discharged from a discharge port at the bottom of the furnace. The suspension furnace is very suitable for powdery materials, has the advantages of short reaction time, high product activity, large single sleeve treatment capacity and the like, can process small-particle ores, and as proposed by Chinese patent ZL201610643705.4, a suspension roasting device of a light-burned magnesia roasting kiln is provided, preheated ore powder and air enter the furnace from the lower part, gas flowing upwards in the furnace enables the ore powder to be in an ascending suspension state, and simultaneously fuel is introduced into the furnace to burn with oxygen in the air to generate heat, so that the materials are heated and decomposed in the ascending process, and products are removed from the upper part and then gas-material separation is carried out.
The prior art adopts hot flue gas as a heat source to directly contact and transfer heat with ores in a furnace, and CO generated by decomposing the ores 2 Inevitably mixed with flue gas, resulting in CO in the gas product 2 Low concentration, high separation and purification difficulty, high cost, direct discharge and carbon discharge. Rotary kilns are another common calcination apparatus for carbonate ores such as limestone, dolomite, magnesite, etc., which can calcine carbonate ores by indirect heating. For example, chinese patent ZL201820558155.0 proposes a light burned MgO CO-production method of high purity CO 2 The production device adopts a double-cylinder rotary kiln calcination system, wherein the outer cylinder is composed of a heat-resistant steel tube, and the inner cylinder is composed of a heat-resistant ceramic tube. The combustion system burns in the inner cylinder, and transmits the heat generated by the combustion to the outer cylinder through the inner cylinder, and magnesite in the outer cylinder is heated and decomposed to obtain light burned MgO and high purity CO 2 . However, the rotary kiln has the defects of high power consumption and the like, and the calcination temperature is about 1000 ℃, so that the material of the rotary kiln body is difficult to meet the long-time operation requirement, the maintenance difficulty is high, the device is difficult to enlarge due to the limitation of the diameter of equipment, and the requirement of large-scale production operation cannot be met.
The existing calcination of carbonate ores has the following problems: the application range of the ore raw materials is small, a plurality of small-particle ores cannot be effectively utilized and are discarded, and resources are seriously wasted; dust is generated in the calcination process, equipment damage is easy to cause, and environmental pollution is easy to cause; the hot flue gas is used as a heat source to directly heat the ore, so that the calcined gas product is diluted by a large amount of flue gas, and CO in the gas 2 The separation difficulty is high, the cost is high, and the carbon emission problem is easy to cause; the mode amplification of the external heating type (rotary kiln) device has the problems of limitation, high operation power consumption, large occupied area, difficult maintenance and nursing and the like. Aiming at the problems, a plurality of research results are improved by combining complex post-treatment procedures on the basis of the traditional calcination equipment, but the problems cannot be fundamentally solved all the time, so that research and development of high-purity CO by calcining small-particle carbonate ores with high efficiency, low consumption and large scale are needed 2 A reactor and a method.
Disclosure of Invention
The invention aims to provide a method for CO-producing high-purity CO by calcining small-particle carbonate ores 2 The invention changes the flow direction of gas products by additionally arranging a central gas collecting cavity as a gas product channel in the center of an external heating type moving bed reactor, and CO-produces high-purity CO while producing solid metal oxide 2 . On the one hand, the external heating mode leads the ore not to be in direct contact with the hot flue gas, and the CO in the gas product is calcined 2 High concentration, can directly obtain high-purity CO 2 . On the other hand, the central gas collection cavity can reduce the bed thickness and the gas flow pressure drop, is used for calcining small-particle carbonate ores, regulates and controls the gas products to transversely pass through the bed layer from the outer layer high-temperature region to the inner layer low-temperature region, reduces the temperature of the gas products and plays a role in strengthening heat transfer for the inner layer; and the gas transversely passes through the bed layer to filter the gas and entrain dust; the reactor can be operated in a single group or in a combination of multiple groups, and is easy for mode amplification and large-scale industrialization.
The invention aims at realizing the following technical scheme:
CO-production of high purity CO by calcination of small particle carbonate ore 2 A reactor, said reactorComprises an ore feed inlet, a moving bed reactor, a central gas collecting cavity, a gas product outlet, a solid product outlet, an air inlet, a clean gas inlet, a flue gas outlet, a combustion chamber, a discharging device and a heat transfer wall; the moving bed reactor is internally provided with a central gas collection cavity, and the outside of the moving bed reactor is provided with a combustion chamber; the central gas collecting cavity is arranged at the center of the moving bed reactor, uniformly distributed gas passage holes are arranged, so that gas products transversely pass through the bed layer from the outer high-temperature region to the inner low-temperature region, enter the central gas collecting cavity, strengthen the heat transfer of the inner layer while reducing the temperature of the gas products, and the gas products entering the central gas collecting cavity are led out of the reactor from the gas product outlet; the combustion chamber is positioned outside the moving bed reactor and is provided with an air inlet, a clean fuel gas inlet and a flue gas outlet; the inner wall of the combustion chamber is a heat transfer wall, and the fuel in the combustion chamber is combusted to generate heat, and the heat required by calcination is transferred to the ore in the moving bed reactor through the heat transfer wall, so that the ore is heated and decomposed.
The calcination of the small-particle carbonate ore CO-produces high-purity CO 2 A reactor, the moving bed reactor shape such as, but not limited to, a cylinder or a cuboid; the moving bed reactor is operated by a single group of modules, or a combination of a plurality of groups of modules, or an amplifying device mode.
The calcination of the small-particle carbonate ore CO-produces high-purity CO 2 The reactor, the central gas collection chamber is placed at the center of the moving bed reactor and has a shape such as, but not limited to, one or more of a cylindrical shape and a rectangular parallelepiped shape.
The calcination of the small-particle carbonate ore CO-produces high-purity CO 2 The reactor, the combustion chamber is located outside the moving bed reactor, such as but not limited to two opposing sides, three sides connected or annular interconnecting channels.
The calcination of the small-particle carbonate ore CO-produces high-purity CO 2 The temperature of the combustion chamber is controlled in a range of 800-1300 ℃ for example and without limitation.
The calcination of the small-particle carbonate ore CO-produces high-purity CO 2 The material of the combustion chamber and the heat transfer wall is refractory brick or refractory pouring or heat-resistant stainless steelOr a plurality thereof.
The calcination of the small-particle carbonate ore CO-produces high-purity CO 2 Reactor of small particle carbonate ore such as, but not limited to, magnesite MgCO 3 CaCO of calcite 3 Dolomite CaMg (CO) 3 ) 2 ZnCO of siderite 3 Siderite FeCO 3 Ore particles.
The calcination of the small-particle carbonate ore CO-produces high-purity CO 2 The reactor is characterized in that the gas dust removal device is a bag-type dust remover, and the gas purification comprises water washing dust removal, drying water removal and impurity removal by adsorption; the solid cooling device is an air cooler and is connected with the feed inlet, the solid product outlet of the moving bed reactor and the solid product outlet of the gas dust removing device.
CO-production of high purity CO by calcination of small particle carbonate ore 2 A method comprising the steps of:
the method comprises the steps of taking small-particle carbonate ore as a raw material, quantitatively adding the small-particle carbonate ore into a moving bed reactor from an ore feed inlet through a feed device, providing heat required by calcination by combustion of fuel gas and air in an external combustion chamber, and transferring the heat to the carbonate ore in the moving bed reactor through a heat transfer wall, wherein the air and the fuel gas are respectively introduced into the air inlet and a clean fuel gas inlet, and the generated flue gas is discharged through a flue gas outlet; carbonate ore particles in the moving bed reactor are heated and decomposed, gas products transversely pass through the bed layer and are discharged through a gas product outlet of the central gas collecting cavity, and high-purity CO is obtained after the gas products are cooled by a gas cooling system, processed by a gas dust removing device and a gas purifying system 2 。
The calcination of the small-particle carbonate ore CO-produces high-purity CO 2 The method realizes complete decomposition of ore by controlling the residence time of the ore in the reactor, solid metal oxide is quantitatively discharged from a solid product outlet at the bottom of the moving bed reactor through a discharging device, and enters a solid cooling device together with the solid separated by a gas dust removal device, and the solid metal oxide product is obtained after cooling.
The invention has the advantages and effects that:
the invention additionally installs a central gas-collecting cavity in the externally heated moving bed reactor, designs a novel calcination reactor suitable for small-particle ores, changes the flowing direction of gas products through the central gas-collecting cavity, and ensures that the gas transversely passes through a bed layer and is discharged through a gas product outlet of the central gas-collecting cavity in the reactor.
The method has the specific advantages that:
1. the invention reduces the bed thickness and the gas flow pressure drop and promotes CO 2 The small-particle carbonate ore is quickly led out to be calcined;
2. according to the invention, the flow of gas from the outer high-temperature region to the inner low-temperature region is regulated and controlled, the heat transfer to the inside of the reactor is enhanced, the calcination reaction time is shortened, the production energy consumption of the product is reduced, the temperature gradient in the reactor is uniform, the activity of the product is high, and the product property is uniform;
3. the bed layer plays a role in dust filtration, and gas dust entrainment and pipeline blockage are avoided;
4. the invention can operate with single or multiple groups of modules, and is easy for mode amplification and large-scale industrialization.
Drawings
FIG. 1 is a schematic view (front view) of the reactor structure of the present invention;
FIG. 2 is a schematic flow chart of the present invention;
FIG. 3 is a schematic view (top view) of an embodiment of a multi-module combination structure of the reactor of the present invention;
FIG. 4 is a schematic diagram A (particle redistribution) of an embodiment of the reactor structure of the present invention;
FIG. 5 is a schematic diagram B (particle redistribution) of an embodiment of the reactor structure of the present invention;
FIG. 6 is a schematic view showing an example of the structure of the reactor of the present invention (water vapor enhanced heat transfer).
The components in the figure: ore feed inlet 1, moving bed reactor 2, central gas collecting chamber 3, gas product outlet 4, solid product outlet 5, air inlet 6, clean gas inlet 7, flue gas outlet 8, combustion chamber 9, discharge device 10, heat transfer wall 11, baffle 12, upper discharge device 13, flue gas pipe 14, gas cooling system 15, gas dust removal device 16, gas purification system 17, solid cooling device 18, water vapor inlet 19.
Detailed Description
The present invention will be described in detail with reference to the embodiments shown in the drawings.
The invention discloses a CO-production method for calcining small-particle carbonate ore and CO-producing high-purity CO 2 The reactor, as shown in figure 1, comprises an ore feed inlet 1, a moving bed reactor 2, a central gas collecting cavity 3, a gas product outlet 4, a solid product outlet 5, an air inlet 6, a clean gas inlet 7, a flue gas outlet 8, a combustion chamber 9, a discharging device 10 and a heat transfer wall 11. The ore feed inlet 1 is positioned at the upper end of the moving bed reactor 2, and small-particle carbonate ore is quantitatively added into the moving bed reactor 2 from the ore feed inlet 1 through a feed device. The moving bed reactor 2 is shaped like, but not limited to, a cylinder or a cuboid, is internally provided with a central gas collection chamber 3, and is externally provided with a combustion chamber 9. The central gas collection chamber 3 is arranged at the center of the moving bed reactor 2 and has one or more shapes such as, but not limited to, a cylinder shape and a cuboid shape; and uniformly distributed gas passage holes are arranged, so that gas products transversely pass through the bed layer from the outer high-temperature region to the inner low-temperature region, enter the central gas collection cavity 3, strengthen the heat transfer of the inner layer while reducing the temperature of the gas products, and the gas products entering the central gas collection cavity 3 are led out of the reactor through the gas product outlet 4. The combustion chamber 9 is located outside the moving bed reactor 2, such as, but not limited to, two opposite sides, three sides connected or annular interconnecting channels; an air inlet 6, a clean gas inlet 7 and a flue gas outlet 8 are arranged; the temperature control range is, for example, but not limited to, 800-1300 ℃; the inner wall of the combustion chamber is a heat transfer wall 11, the fuel in the combustion chamber burns to generate heat, the heat required by calcination is transferred to the ore in the moving bed reactor 2 through the heat transfer wall 11 to be heated and decomposed, and the combustion chamber 9 and the heat transfer wall 11 can be made of one or more of refractory bricks, refractory pouring and heat-resistant stainless steel. The discharging device 10 is connected with the lower solid product outlet 5, can be set into one or more, and is used for regulating and controlling the discharge amount of the solid metal oxide, controlling the height of a bed layer in the moving bed, reducing the phenomena of raw material burning and overburning in the bed and improving the activity of the product.
The small particle carbonate ore of the inventionCO-production of high purity CO by calcination 2 The method flow, as shown in fig. 2, comprises the following specific processes: the small-particle carbonate ore is taken as a raw material, the small-particle carbonate ore is quantitatively added into the moving bed reactor 2 from an ore feed inlet 1 through a feeding device, heat required by calcination is provided by combustion of fuel gas and air in an external combustion chamber 9, the heat is transferred to the carbonate ore in the moving bed reactor through a heat transfer wall 11, wherein the air and the fuel gas are respectively fed through an air inlet 6 and a clean fuel gas inlet 7, and generated flue gas is discharged through a flue gas outlet 8. Carbonate ore particles in the moving bed reactor 2 are heated and decomposed, gas products transversely pass through a bed layer and are discharged through a gas product outlet 4 of the central gas collection cavity 3, and after being cooled by a gas cooling system 15, processed by a gas dust removal device 16 and a gas purification system 17, high-purity CO is obtained 2 The method comprises the steps of carrying out a first treatment on the surface of the By controlling the residence time of the ore in the reactor, the ore is completely decomposed, the solid metal oxide is quantitatively discharged from a solid product outlet 5 at the bottom of the moving bed reactor through a discharging device 10, and enters a solid cooling device 18 together with the solid separated by a gas dust removing device 16, and the solid metal oxide product is obtained after cooling and collecting. The small-particle carbonate ore is heated to decompose to obtain solid metal oxide and high-purity CO 2 The specific process is as follows.
Example 1
The multi-module combined structure (top view) of the reactor of this embodiment is shown in fig. 3. The two moving bed reactors are arranged longitudinally and are connected through a combustion chamber to form a multi-module combination of the combustion chamber, the reactor, the combustion chamber, the reactor and the combustion chamber from the top view. When the moving bed reactor is used for calcining small-particle carbonate ore, the small-particle carbonate ore is fed at the top of the moving bed reactor 2 through a feeding device, combustion gas and air in two external combustion chambers 9 and combustion chambers 9 connected with the two moving bed reactors burn to provide heat required by calcining, the heat is transferred to the carbonate ore in the moving bed reactor 2 through a heat transfer wall 11, air and gas in three combustion chambers 9 are respectively fed through an air inlet 6 and a clean gas inlet 7, and generated flue gas is discharged through a flue gas outlet 8. The carbonate ore particles in the two moving bed reactors 2 are simultaneously heated to decompose and the gas products are transversePasses through the bed layer, is discharged through a gas product outlet 4 of the central gas collecting cavity 3, is cooled and is dedusted and purified to obtain high-purity CO 2 The method comprises the steps of carrying out a first treatment on the surface of the The solid metal oxide is discharged from the bottom of the moving bed reactor, and is collected after being cooled together with the solid separated from the dust removal of the gas product.
Example 2
The reactor structure of this example is schematically shown as a (particle redistribution) in fig. 4, and comprises an ore feed inlet 1, a moving bed reactor 2, a central gas collection chamber 3, a gas product outlet 4, a solid product outlet 5, an air inlet 6, a clean gas inlet 7, a flue gas outlet 8, a combustion chamber 9, a discharge device 10, a heat transfer wall 11, and a baffle 12.
Wherein the moving bed reactor is longitudinally enlarged and prolonged, and baffle plates 12 are transversely arranged on each side of the central height of the reactor; the baffle 12 is in a horizontal equilateral trapezoid shape in front view, one end of a long side is fixed on the heat transfer wall 11, one end of a short side is close to the central air collecting cavity 3, a space is reserved, the diameter of the central air collecting cavity can be properly reduced, the baffle can fully penetrate into a bed layer, and the function of redistributing particles is achieved on the material particles. When the moving bed reactor is used for calcining carbonate ores, small-particle ores are quantitatively added into the moving bed reactor 2 from the upper ore feed inlet 1, combustion gas and air in the external combustion chamber 9 provide heat required for calcining, the heat is transferred to the carbonate ores in the moving bed reactor through the heat transfer wall 11, the external ores in the upper reactor are decomposed and crushed first, the formed powder products seriously obstruct heat transfer, the bed layer moves downwards, the powder products and unreacted large-particle ores are discharged into the lower reactor through the baffle 12, a stacking angle is formed at the top of the lower reactor, due to different particle sizes and densities of the small-particle ores and the powder products, the powder products are concentrated in the center of the moving bed reactor after passing through the stacking angle, unreacted small-particle ores are redistributed to the outer side of the moving bed reactor and are heated and decomposed by contacting with the high-temperature heat transfer wall, the whole heat transfer efficiency and the processing capacity of the device are greatly improved, the production capacity is reduced, and the solid metal oxide quality is uniform and stable. Wherein air and fuel gas are respectively introduced into the air inlet 6 and the clean fuel gas inlet 7, and generated flue gas is discharged through the flue gas outlet 8. Moving bedCarbonate ore particles in the reactor 2 are heated and decomposed, gas products transversely pass through a bed layer and flow to the central gas collection cavity 3, after being cooled by the inner low-temperature bed layer, the gas products flow into the central gas collection cavity 3 through gas passage holes, are discharged from a gas product outlet 4 of the central gas collection cavity 3, and after being cooled, the gas products are dedusted and purified to obtain high-purity CO 2 The method comprises the steps of carrying out a first treatment on the surface of the By controlling the residence time of the ore in the reactor, complete decomposition of the ore is achieved, and the solid metal oxide is quantitatively discharged from the two solid product outlets 5 at the bottom of the moving bed reactor through the discharging device 10, cooled and collected. Thus obtaining the solid metal oxide and high-purity CO 2 。
Example 3
The reactor structure of this example is schematically shown as B (particle redistribution) and, as shown in fig. 5, comprises an ore feed inlet 1, a moving bed reactor 2, a central gas collection chamber 3, a gas product outlet 4, a solid product outlet 5, an air inlet 6, a clean gas inlet 7, a flue gas outlet 8, a combustion chamber 9, a discharge device 10, a heat transfer wall 11, an upper discharge device 13, and a flue gas duct 14.
Wherein the moving bed reactor is divided into an upper section and a lower section, which are connected with a flue gas pipeline 14 through an upper section discharging device 13, and the position of a gas product outlet of a central gas collecting cavity in the lower section moving bed is opposite to the upper part. Wherein the upper-stage discharging device 13 plays a role in redistributing the material particles. When the moving bed reactor is used for calcining carbonate ore, small-particle ore is quantitatively added into the moving bed reactor 2 at the upper section from the ore feed inlet 1 at the upper end, the combustion of fuel gas and air in the external combustion chamber 9 provides heat required for calcining, and the heat is indirectly transferred into the moving bed reactor through the heat transfer wall 11. Carbonate ore particles in the upper moving bed reactor 2 are heated and decomposed, gas products transversely pass through a bed layer and flow to the central gas collection cavity 3, after being cooled by the inner low-temperature bed layer, the gas products flow into the central gas collection cavity 3 through gas passage holes, are discharged through a gas product outlet 4 of the central gas collection cavity 3, and after being cooled, the gas products are dedusted and purified to obtain high-purity CO 2 . The external ore in the upper reactor is decomposed and crushed by heating, the formed powder product can seriously obstruct heat transfer, the bed layer moves downwards, and the powder product and unreacted large-particle ore pass through the upper section to be dischargedThe material device 13 is discharged into the lower reactor, so that a stacking angle is formed at the top of the lower reactor, powder products normally move downwards from the center, unreacted large-particle ores in the powder products are redistributed to the outside and are close to the combustion chamber, heat is continuously provided through the outer combustion chamber 9 to enable the unreacted large-particle ores to be heated and decomposed, the overall heat transfer efficiency and the processing capacity of the device are greatly improved, the production energy consumption is reduced, and the quality of the solid metal oxide is uniform and stable. Wherein the lower section combustion chamber is connected with the upper section combustion chamber through a flue gas pipeline 14, air and fuel gas are provided through the lower section combustion chamber air inlet 6 and the clean fuel gas inlet 7, and the flue gas after combustion is discharged from a flue gas outlet 8 of the upper section combustion chamber. Carbonate ore particles in the lower moving bed reactor 2 are heated and decomposed, gas products transversely pass through a bed layer and flow to the central gas collection cavity 3, after being cooled by the inner low-temperature bed layer, the gas products flow into the central gas collection cavity 3 through gas passage holes, are discharged through a gas product outlet 4 of the central gas collection cavity 3, and after being cooled, the gas products are dedusted and purified to obtain high-purity CO 2 The method comprises the steps of carrying out a first treatment on the surface of the By controlling the residence time of the ore in the reactor, complete decomposition of the ore is achieved, and the solid metal oxide is quantitatively discharged from the two solid product outlets 5 at the bottom of the moving bed reactor through the discharging device 10, cooled and collected. Thus obtaining the solid metal oxide and high-purity CO 2 。
Example 4
The reactor structure of this example (water vapor enhanced heat transfer) is schematically shown in fig. 6, and includes an ore feed inlet 1, a moving bed reactor 2, a central gas collection chamber 3, a gas product outlet 4, a solid product outlet 5, an air inlet 6, a clean gas inlet 7, a flue gas outlet 8, a combustion chamber 9, a discharge device 10, a heat transfer wall 11, and a water vapor inlet 19.
On the basis of the structure of a common reactor, water vapor is introduced into the reactor from a plurality of water vapor inlets 19, so that the heat transfer efficiency is improved, and small-particle carbonate ores are heated rapidly and uniformly. When the moving bed reactor is used for calcining carbonate ore, small-particle ore is quantitatively added into the moving bed reactor 2 from the upper ore feed inlet 1. The heat required for calcination is provided by combustion of the gas and air in the external combustion chamber 9, and is transferred to the carbonate ore in the moving bed reactor through the heat transfer wall 11The stone, wherein air and fuel gas are respectively introduced into the stone through an air inlet 6 and a clean fuel gas inlet 7, and the generated flue gas is discharged through a flue gas outlet 8. And steam is introduced into the reactor from a plurality of steam inlets 19, the steam transfers the high-temperature heat at the outer side to the low-temperature bed layer inside, so that the heat transfer efficiency is improved, the partial pressure of the gas around the ore is reduced, the decomposition temperature is reduced, the decomposition speed is improved, small-particle carbonate ore is heated rapidly and uniformly, and the small-particle carbonate ore is decomposed into gas CO gradually 2 And solid metal oxides. The gas and the water vapor transversely pass through the bed layer and flow to the central gas collection cavity 3, after being cooled by the inner low-temperature bed layer, the gas flows into the central gas collection cavity 3 through the gas passage holes, is discharged through the gas product outlet 4 of the central gas collection cavity 3, and after being cooled, the gas is dedusted and purified to obtain high-purity CO 2 The method comprises the steps of carrying out a first treatment on the surface of the By controlling the residence time of the ore in the reactor, complete decomposition of the ore is achieved, and the solid metal oxide is quantitatively discharged from the two solid product outlets 5 at the bottom of the moving bed reactor through the discharging device 10, cooled and collected. Thus obtaining the solid metal oxide and high-purity CO 2 。
The present invention has been described with particular reference to the principles and embodiments thereof, but the above examples are provided to facilitate understanding of the method and core ideas of the invention. The foregoing is merely a preferred embodiment of the invention, and it should be noted that, due to the limited text expressions, there is objectively no limit to the specific structure, and that, for a person skilled in the art, modifications, adaptations or variations may be made without departing from the principles of the present invention, and the above technical features may be combined in any suitable manner; such modifications, variations and combinations, or the direct application of the concepts and aspects of the principles without modification thereto, are contemplated as being within the scope of the present invention.
Claims (8)
1. CO-production of high purity CO by calcination of small particle carbonate ore 2 The reactor is characterized by comprising an ore feed inlet (1), a moving bed reactor (2), a central gas collecting cavity (3), a gas product outlet (4), a solid product outlet (5), an air inlet (6), a clean gas inlet (7) and smokeThe device comprises a gas outlet (8), a combustion chamber (9), a discharging device (10), a heat transfer wall (11), a gas dust removing device and a solid cooling device; the moving bed reactor (2) is internally provided with a central gas collection cavity (3) and is externally provided with a combustion chamber (9); the central gas collecting cavity (3) is arranged at the center of the moving bed reactor (2), uniformly distributed gas passage holes are arranged, so that gas products transversely pass through a bed layer from an outer high-temperature region to an inner low-temperature region, enter the central gas collecting cavity (3), heat transfer of the inner layer is enhanced while the temperature of the gas products is reduced, and the gas products entering the central gas collecting cavity (3) are led out of the reactor through a gas product outlet (4); the combustion chamber (9) is positioned at the outer side of the moving bed reactor (2) and is provided with an air inlet (6), a clean fuel gas inlet (7) and a flue gas outlet (8); the inner wall of the combustion chamber is a heat transfer wall (11), and the fuel in the combustion chamber is combusted to generate heat, and the heat required by calcination is transferred to the ore in the moving bed reactor (2) through the heat transfer wall (11) to be heated and decomposed.
2. The CO-production of high purity CO by calcination of small particle carbonate ore according to claim 1 2 The reactor is characterized in that the moving bed reactor (2) is cylindrical or cuboid in shape; the moving bed reactor is operated by a single group of modules, or a combination of a plurality of groups of modules, or an amplifying device mode.
3. The CO-production of high purity CO by calcination of small particle carbonate ore according to claim 1 2 The reactor is characterized in that the central gas collection cavity (3) is arranged at the center of the moving bed reactor (2) and is one or more of cylindrical and cuboid.
4. The CO-production of high purity CO by calcination of small particle carbonate ore according to claim 1 2 Reactor, characterized in that the combustion chamber (9) is located outside the moving bed reactor (2), i.e. on opposite sides, on three connected sides or in annular mutually communicating channels.
5. The CO-production of high purity CO by calcination of small particle carbonate ore according to claim 1 2 A reactor is characterized in thatThe temperature control range of the combustion chamber (9) is 800-1300 ℃.
6. The CO-production of high purity CO by calcination of small particle carbonate ore according to claim 1 2 The reactor is characterized in that the combustion chamber (9) and the heat transfer wall (11) are made of one or more of refractory bricks or refractory casting or heat-resistant stainless steel.
7. The CO-production of high purity CO by calcination of small particle carbonate ore according to claim 1 2 The reactor is characterized in that the small-particle carbonate ore is magnesite MgCO 3 CaCO of calcite 3 Dolomite CaMg (CO) 3 ) 2 ZnCO of siderite 3 Siderite FeCO 3 Ore particles.
8. The CO-production of high purity CO by calcination of small particle carbonate ore according to claim 1 2 The reactor is characterized in that the gas dust removal device is a bag-type dust remover, and gas purification comprises water washing dust removal, drying and water removal and impurity adsorption removal; the solid cooling device is an air cooler and is connected with the feed inlet, the solid product outlet of the moving bed reactor and the solid product outlet of the gas dust removing device.
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| CN202210244560.6A CN114620726B (en) | 2022-03-14 | 2022-03-14 | CO-production of high purity CO by calcination of small particle carbonate ore 2 Reactor and method thereof |
| PCT/CN2023/079744 WO2023174082A1 (en) | 2022-03-14 | 2023-03-06 | High-purity co2 coproduction reactor which calcines small-particle carbonate ore, and method therefor |
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| CN202210244560.6A CN114620726B (en) | 2022-03-14 | 2022-03-14 | CO-production of high purity CO by calcination of small particle carbonate ore 2 Reactor and method thereof |
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Citations (4)
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|---|---|---|---|---|
| CN1120588A (en) * | 1994-10-14 | 1996-04-17 | 中国科学院化工冶金研究所 | Calcining system and technique for fluidized bed-mobile bed mixed reactor |
| CN107057797A (en) * | 2017-03-28 | 2017-08-18 | 大连理工大学 | A kind of composite oxygen carrier, preparation method and its application in solid fuel gasification |
| CN108558238A (en) * | 2018-04-18 | 2018-09-21 | 镇江苏博特新材料有限公司 | A kind of light-burned MgO co-producing high-purities CO2Production system |
| CN110951508A (en) * | 2019-12-16 | 2020-04-03 | 中国科学院山西煤炭化学研究所 | Device and process for preparing methane by coal chemical-looping catalytic gasification based on calcium oxide |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1154388B (en) * | 1959-08-17 | 1963-09-12 | Beckenbach Karl | Shaft furnace charged with limestone, dolomite or the like with automatic control of the discharge device |
| CA2965298C (en) * | 2009-11-16 | 2018-07-17 | Mitsubishi Materials Corporation | Mixing calciner |
| FR2975094B1 (en) * | 2011-05-12 | 2013-05-03 | Lafarge Sa | DECARBONATION PROCESS |
| CN213012597U (en) * | 2020-08-05 | 2021-04-20 | 沈阳鑫博工业技术股份有限公司 | High-purity magnesia apparatus for producing |
| CN113477186B (en) * | 2021-06-22 | 2022-07-01 | 沈阳化工大学 | Selective catalytic upgrading device and method for heavy tar |
| CN114620726B (en) * | 2022-03-14 | 2023-09-15 | 沈阳化工大学 | CO-production of high purity CO by calcination of small particle carbonate ore 2 Reactor and method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1120588A (en) * | 1994-10-14 | 1996-04-17 | 中国科学院化工冶金研究所 | Calcining system and technique for fluidized bed-mobile bed mixed reactor |
| CN107057797A (en) * | 2017-03-28 | 2017-08-18 | 大连理工大学 | A kind of composite oxygen carrier, preparation method and its application in solid fuel gasification |
| CN108558238A (en) * | 2018-04-18 | 2018-09-21 | 镇江苏博特新材料有限公司 | A kind of light-burned MgO co-producing high-purities CO2Production system |
| CN110951508A (en) * | 2019-12-16 | 2020-04-03 | 中国科学院山西煤炭化学研究所 | Device and process for preparing methane by coal chemical-looping catalytic gasification based on calcium oxide |
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| CN114620726A (en) | 2022-06-14 |
| WO2023174082A1 (en) | 2023-09-21 |
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