CN114262170A - Process and system for calcining cement clinker by stably using new energy - Google Patents
Process and system for calcining cement clinker by stably using new energy Download PDFInfo
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- CN114262170A CN114262170A CN202111393144.4A CN202111393144A CN114262170A CN 114262170 A CN114262170 A CN 114262170A CN 202111393144 A CN202111393144 A CN 202111393144A CN 114262170 A CN114262170 A CN 114262170A
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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- Y02P40/00—Technologies relating to the processing of minerals
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- Y02P40/125—Fuels from renewable energy sources, e.g. waste or biomass
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Abstract
The invention discloses a process and a system for calcining cement clinker by using new energy stably, and the process comprises the specific steps of preheating raw materials to 700 ℃ plus energy of 300 through a preheater unit, feeding the raw materials into a solar energy decomposition reactor, decomposing the raw materials when the temperature of the energy absorbed by the solar energy decomposition reactor reaches 1300 ℃ plus energy of 900 plus energy, wherein the decomposition rate reaches 80-92%, the decomposed hot raw materials enter a rotary kiln for calcination, the fuel of the rotary kiln adopts green hydrogen and/or biological fuel for providing heat, the temperature in the kiln reaches 1500 ℃ plus energy, and the raw materials fall into a kiln head cooling machine for cooling after being discharged from the kiln, so that a clinker finished product is obtained. The invention adopts solar energy and hydrogen energy to replace 100% of fuel of the existing cement production line, avoids the generation of fuel carbon emission in the production process of cement clinker, and can selectively enter a rotary kiln or a storage warehouse according to the intensity of sunlight, thereby realizing stable production.
Description
Technical Field
The invention relates to the technical field of environment-friendly cement, in particular to a process and a system for calcining cement clinker by stably using new energy.
Background
The cement industry is a large energy consumption household, and data published by the building materials association show that: in 2020, the cement yield in China reaches 23.77 million tons, carbon dioxide in cement industry discharges 12.3 million tons, wherein the power consumption is indirectly converted into about 8955 million tons of carbon dioxide equivalent, and the pressure of carbon emission reduction is very large. According to the estimation of national standard energy consumption limit, the coal consumption of the cement industry exceeds 2 billion tons of coal, and the power consumption exceeds 2 billion degrees of electricity. The energy consumption of cement production is mainly from clinker production process analysis, and accounts for about 94%, and the energy type analysis is mainly from coal and electricity, wherein the coal provides about 94% of energy, so that the dependence of the cement industry on fossil energy, particularly coal, is very large. Under the pressure of carbon neutralization, the consumption of fossil energy must be reduced in the cement industry, and the adoption of new energy technology is an important choice for realizing carbon neutralization in the preparation of cement clinker.
Solar energy and hydrogen energy are important options of known clean energy sources, for example, the energy density of hydrogen is 140MJ/kg, 3.25 times of the energy density of gasoline (43MJ/kg), 2.80 times of the energy density of solid fuel (50MJ/kg), the preparation cost of green hydrogen is gradually reduced, and the green hydrogen is adopted to replace fossil fuel, so that the load of storing and conveying cement production fuel can be reduced. With the continuous maturation of the photothermal technology and the green hydrogen technology, conditions are created for the new energy source for the cement clinker calcination, but a plurality of problems still exist, especially the energy supply is unstable, the severe fluctuation is easily generated by the change of peripheral conditions such as natural environment and the like, the continuous production of a cement calcination system cannot be realized, and the application pace of the new energy source technology in the cement industry is limited.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a process and a system for stably calcining cement clinker by using new energy, which solve the problem that the existing cement production depends on fossil energy, greatly reduce the fuel carbon emission in the cement production process by using solar energy and hydrogen energy, and improve the CO content in waste gas2The concentration of the cement clinker creates a basic condition for zero carbon emission in cement clinker production.
The invention is realized in this way, a process for calcining cement clinker by stably using new energy, raw materials are preheated to 700 ℃ of 300-.
Preferably, part of the hot raw meal decomposed by the solar decomposition reactor may be cooled and then fed to the storage reservoir when the solar energy is sufficient; when the solar energy is insufficient, decomposed raw materials stored in the storage warehouse are fed into a tail smoke chamber of the rotary kiln, and the stable production of the kiln system is ensured.
Further preferably, the hot air that cools the hot raw meal before it is fed to the holding reservoir is led to the decomposing furnace for recycling.
Preferably, the exhaust gas of the preheater unit enters a solar energy decomposition reactor and/or a kiln head cooler or is separately subjected to carbon capture utilization, thereby realizing zero carbon emission and carbon utilization.
Further preferred isThe exhaust gas entering the solar decomposition reactor and/or the CO generated by the hot raw meal in the solar decomposition reactor2Transporting the carbon dioxide to a carbon capture and utilization system, and under the action of a catalyst, adding water and CO2Preparing synthesis gas or liquid fuel; or, the exhaust gas entering the solar decomposition reactor, and/or CO produced by the hot raw meal inside the solar decomposition reactor2A final preheater delivered to the preheater unit; or, the exhaust gas entering the solar decomposition reactor, and/or CO produced by the hot raw meal inside the solar decomposition reactor2One part is sent to the carbon capture utilization system and one part is sent to the final preheater of the preheater unit.
Preferably, the kiln head cooler utilizes waste gas or ambient air of the preheater unit to cool the clinker, and gas after heat exchange with the clinker enters the rotary kiln again to dilute heat instantaneously released after combustion of hydrogen gas, so as to stabilize ventilation of the rotary kiln.
Preferably, when the illumination condition is insufficient or the solar decomposition reactor equipment is overhauled, the heat of the decomposition furnace is supplemented through the biofuel, and oxygen required by combustion of the biofuel is introduced through an air supplementing opening at the lower part of the decomposition furnace for air supplementing.
The utility model provides a system for stably use new forms of energy to calcine cement clinker, includes preheater unit, dore furnace, rotary kiln, kiln head cooler, still includes solar energy decomposition reactor and solar mirror field, be provided with the branch material valve on the penultimate level preheater bottom discharging pipe of preheater unit, a way and the solar energy decomposition reactor pan feeding mouth of branch material valve are connected, solar energy decomposition reactor is used for absorbing the energy in solar mirror field decomposes the raw material, the discharge gate pipeline and the preheater income kiln material union coupling of solar energy decomposition reactor, the kiln head department of rotary kiln is provided with the biofuel entry.
Preferably, the system further comprises a storage warehouse, wherein the discharge port pipeline of the solar decomposition reactor is also connected with the storage warehouse, so that the discharge port pipeline of the solar decomposition reactor is divided into two paths, and gate valves are respectively arranged on the two paths; a cooler for cooling the decomposed hot raw meal is arranged on a branch connected with the storage reservoir; and a discharge hole at the bottom of the storage warehouse is connected with a smoke chamber at the tail of the rotary kiln.
Further preferably, the hot air outlet of the cooler is connected to the decomposing furnace.
Preferably, the waste gas outlet of the preheater unit is connected with the air inlet of the solar energy decomposition reactor and/or the kiln head cooler.
Preferably, the gas outlet of the solar decomposition reactor is connected to the inlet of the final preheater of the preheater unit.
Preferably, a biofuel supplement inlet and a biofuel supplement port are arranged at the lower part of the decomposing furnace, so that on one hand, the energy supply of a heat stabilizing system is supplemented, and on the other hand, the switching of the conventional cement calcining process can be realized during the long-time insufficient solar energy input or the overhaul of the solar energy decomposing reactor equipment.
The invention has the following advantages and beneficial effects:
1. the system changes the current situation that the prior cement clinker production depends on fossil fuels such as coal and the like, adopts solar energy and hydrogen energy to replace 100 percent of the fuels of the prior cement production line, and avoids the generation of fuel carbon emission in the cement clinker production process.
2. The system of the invention carries out solar energy storage by decomposing and absorbing heat of carbonate in cement raw materials, is provided with a gate valve capable of switching branches, and selectively enters a rotary kiln or a storage warehouse according to the sunlight intensity, thereby realizing stable production.
3. The carbon emissions of traditional cement clinker production result from fuel combustion and calcium carbonate decomposition, with CO in the flue gas due to large air entrainment2The concentration is 15-35%, compared with the original cement production line, the invention decomposes the CO generated by the calcium carbonate2The outlet of the solar energy decomposition reactor is isolated independently, the purity of the solar energy decomposition reactor is high, the solar energy decomposition reactor can be directly used for preparing synthesis gas or organic fuel for carbon utilization, and the cost of carbon enrichment and purification is reduced.
4. The invention uses solar energy to replace the fuel at the tail of the kiln, uses hydrogen energy to replace the fuel of the rotary kiln, heats the raw material by the smoke gas at the outlet of the rotary kiln through a preheater unit, carries out heat recovery, reduces the temperature of the smoke gas to 90-300 ℃, and circulates back to a kiln head cooler to cool the clinker.
5. The kiln head and the kiln tail of the invention both adopt new energy, the storage house, the conveying equipment and the coal mill of the traditional fuel can be cancelled, and the original occupied space is reserved for the solar mirror field.
6. Aiming at the existing cement plant, the equipment of the original preheater unit, the decomposing furnace, the rotary kiln, the kiln head cooler and other main machines can be reserved, and a mirror field, a solar energy decomposing reactor and green hydrogen energy transmission are newly built.
Drawings
FIG. 1 is a flow chart of a system for calcining cement clinker by stably using new energy provided by an embodiment of the invention;
FIG. 2 is a flow chart of a system for calcining cement clinker by using new energy stably according to an embodiment of the present invention;
FIG. 3 is a flow chart of a system for calcining cement clinker by stably using new energy provided by the second embodiment of the invention.
In the figure: 1. a solar mirror field; 2. a solar energy decomposition reactor; 3. a gate valve; 4. a cooler; 5. a repository; 6. a preheater unit; 6-1, a material distributing valve; 6-2, a preheater feeding pipe; 7. a decomposing furnace; 8. a rotary kiln; 9. a biofuel inlet; 10. kiln hood cooler.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The existing cement clinker production line has great dependence on fossil energy, and clean energy is needed to achieve the 3060 carbon peak carbon neutralization target, so that the consumption of the fossil energy is reduced.
Referring to fig. 1 to 3, the embodiment provides a system for calcining cement clinker by using new energy stably, which includes a preheater unit 6, a decomposing furnace 7, a rotary kiln 8, a kiln head cooler 10, a solar energy decomposing reactor 2 and a solar mirror field 1, wherein a material distributing valve 6-1 is arranged on a material discharging pipe at the bottom of a penultimate preheater of the preheater unit 6, one outlet of the material distributing valve 6-1 is connected with a material inlet of the solar energy decomposing reactor 2, the other outlet of the material distributing valve 6-1 is connected with the decomposing furnace 7, the solar energy decomposing reactor 2 is used for absorbing energy of the solar mirror field 1 to decompose raw materials, a material discharging pipe of the solar energy decomposing reactor 2 is connected with a material charging pipe 6-2 of the preheater, a bottom outlet of a last stage of the preheater unit 6 is connected with a kiln tail smoke chamber of the rotary kiln 8 through the material charging pipe 6-2 of the preheater, the kiln head of the rotary kiln 8 is provided with a biofuel inlet 9, and in the embodiment, the biofuel selects hydrogen energy and is matched with a small amount of biofuel such as meat, bone meal and the like.
The specific process comprises the following steps: the raw materials are preheated to the temperature of 700-.
In order to further realize the aim, a storage warehouse 5 is also arranged, a discharge port pipeline of the solar energy decomposition reactor 2 is also connected with the storage warehouse 5, so that the discharge port pipeline of the solar energy decomposition reactor 2 is divided into two paths, one path is connected with a kiln feeding pipe 6-2 of a preheater, the other path is connected with the storage warehouse 5, gate valves 3 are respectively arranged on the two paths, so that hot raw materials decomposed by the solar energy decomposition reactor 2 enter the kiln feeding pipe 6-2 of the preheater, and the other path enters the storage warehouse 5; a cooler 4 is arranged on the branch connected with the storage tank 5, and the cooler 4 is preferably a cyclone cooler 4.
When solar energy is sufficient, partial hot raw materials decomposed by the solar energy decomposition reactor 2 can enter the storage warehouse 5 for storage and standby after being cooled by the cooler 4 before entering the storage warehouse 5, and a part of excessive decomposed hot raw materials are switched to be cooled to enter the storage warehouse 5, so that solar energy can be stored in the decomposed raw materials when the sunlight is sufficient, and the standby regulation is performed in the state when the solar energy is insufficient. The bottom discharge hole of the storage warehouse 5 is connected with the kiln tail smoke chamber of the rotary kiln 8, the kiln feeding device is arranged at the bottom discharge hole of the storage warehouse 5, when the solar energy is insufficient, the kiln feeding device at the bottom of the storage warehouse 5 is opened, decomposed raw materials stored in the storage warehouse 5 are fed into the kiln tail smoke chamber of the rotary kiln 8, and therefore the feeding stability of a kiln system is guaranteed, and the production continuity is achieved.
The exhaust gas entering the solar decomposition reactor 2, and/or the CO generated from the hot raw meal inside the solar decomposition reactor 22Transporting the carbon dioxide to a carbon capture and utilization system, and under the action of a catalyst, adding water and CO2Preparing synthesis gas or liquid fuel; or, the exhaust gas entering the solar decomposition reactor 2, and/or the CO generated by the hot raw meal inside the solar decomposition reactor 22To the final preheater of the preheater unit 6; or, the exhaust gas entering the solar decomposition reactor 2, and/or the CO generated by the hot raw meal inside the solar decomposition reactor 22One part is sent to the carbon capture utilization system and one part is sent to the final preheater of the preheater unit 6. The hot air outlet of the cooler 4 is connected to the decomposing furnace 7, and in particular, the hot air outlet of the cooler 4 is connected to the bottom of the column of the decomposing furnace 7, so that the hot air for cooling the hot raw meal can be introduced into the decomposing furnace 7 for recycling before entering the storage 5.
Furthermore, when the energy of the solar mirror field 1 is not sufficient for the decomposition of the whole raw meal entering the preheater unit 6, it is also possible to feed part or all of the raw meal preheated by the preheater unit 6 to the decomposing furnace 7 for decomposition. The bottom of the column body of the decomposing furnace 7 is provided with a biofuel supplement inlet and a biofuel supplement port, the decomposing furnace 7 supplements heat through supplementing the biofuel, oxygen required by combustion of the biofuel is introduced through the biofuel supplement port at the lower part of the decomposing furnace 7 for supplementing air, so that on one hand, energy supply of a heat stabilizing system can be supplemented, and on the other hand, switching of a conventional cement calcining process can be realized during long-time insufficient solar energy input or equipment maintenance of the solar energy decomposing reactor 2.
The kiln head cooler 10 can adopt a grate cooler, and can also adopt other cooling machines, such as a single-cylinder cooler and the like, and the specific form is not limited to the above. The cooling gas for cooling the clinker by the kiln head cooler 10 can come from the waste gas of the preheater unit 6, specifically, the waste gas outlet of the preheater unit 6 is connected with the air inlet of the kiln head cooler 10, the kiln head cooler 10 is provided with waste gas circulation, and the clinker is cooled by the waste gas of the preheater unit 6; or from ambient air. The waste gas after heat exchange with the clinker enters the rotary kiln 8 again, and the heat instantaneously released after the combustion of the hydrogen can be diluted, so that the ventilation of the rotary kiln 8 is stabilized.
Example 1
The system for calcining cement clinker by stably using new energy of the invention establishes a cement production line, please refer to fig. 2, which comprises: the device comprises a solar mirror field 1, a solar decomposition reactor 2, a storage warehouse 5, a preheater unit 6, a decomposing furnace 7, a rotary kiln 8, a kiln head cooler 10 and corresponding connecting air pipes and material conveying devices.
The process method comprises the following steps: the raw materials are preheated to the temperature of 300-; the fuel of the rotary kiln 8 adopts hydrogen energy to provide heat, the temperature in the kiln reaches 900-1500 ℃, the thermal raw material decomposed by the solar energy decomposition reactor 2 is fired to form clinker, the clinker falls into a kiln head cooling machine 10 after being discharged from the kiln, the kiln head cooling machine 10 adopts a single-cylinder cooling machine, ambient air is extracted by using negative pressure to serve as cooling gas to cool the clinker, and the finished product is obtained after the clinker is cooled.
In this embodiment, the exhaust gas outlet of the preheater unit 6 is connected to the solar energy decomposition reactor 2 through the pulverizing system, the exhaust gas generated by the cement kiln passes through the pulverizing system and then enters the solar energy decomposition reactor 2, the water and CO2 in the exhaust gas, and the CO generated by the thermal raw material in the solar energy decomposition reactor 22And the carbon is conveyed to a carbon capture utilization system, and the synthesis gas or the liquid fuel is prepared through photo-thermal catalytic reaction under the action of a catalyst, so that zero carbon emission and carbon utilization are realized.
The hot air outlet of the cooler 4 is connected to the decomposing furnace 7 and the hot air that cools the hot raw meal before it is fed to the storage 5 is led to the decomposing furnace 7 for recycling.
Example 2
The system for calcining cement clinker by stably using new energy of the invention reforms the existing cement production line, please refer to fig. 3, and comprises a newly added device: solar mirror field 1, solar energy decomposing reactor 2, storage warehouse 5 and corresponding connecting air pipe and material conveying device.
The process method comprises the following steps: the raw materials are preheated to 700 ℃ through a preheater unit 6, fed into a solar decomposition reactor 2, the energy temperature absorbed by the solar decomposition reactor 2 in a solar mirror field 1 reaches 900 ℃ to 1200 ℃, the raw materials are decomposed, the decomposition rate reaches 80-92%, the decomposed hot raw materials enter a rotary kiln 8 through a kiln tail smoke chamber of the rotary kiln 8 to be calcined, and CO generated by decomposing the raw materials2Enters the last stage preheater inlet of the preheater unit 6 to provide heat to the preheater unit 6; the fuel of the rotary kiln 8 adopts hydrogen energy to provide heat, the temperature in the kiln reaches 900-.
In the embodiment, the waste gas at the outlet of the preheater unit 6 passes through the grinding system and then enters the grate cooler, so that the waste gas is recycled; the rest waste gas enters CCUS, so that zero carbon emission and carbon utilization are realized.
The solar energy is stored by decomposing and absorbing heat of raw materials, and decomposed raw materials can be used for supplement when the illumination condition is insufficient, so that new energy is stably utilized for normal production; secondly, because of adopting solar energy, the air adopted by the prior fuel combustion is greatly reduced, and CO in the flue gas produced by the cement kiln2The concentration is greatly improved, and the subsequent carbon capture, purification and utilization are facilitated; and thirdly, fossil energy such as coal is replaced by solar energy and hydrogen energy, an industrialization scheme of calcining clinker by new energy is provided, and fuel carbon emission in the cement production process is greatly reduced.
In conclusion, the solar energy is used as a main energy source, so that the carbon emission of the fuel of the cement clinker is greatly reduced, and the hydrogen energy is used for replacing the fuel of the kiln head of the cement kiln, thereby realizing the production of the cement clinker by 100 percent replacing fossil fuel, and greatly reducing the carbon emission of a cement factory. CO of cement kiln system flue gas due to reduction of air amount required for fuel combustion2The concentration is greatly improved, the cost of subsequent capture and purification is reduced, and zero carbon emission in cement production can be realized by matching with the preparation of synthesis gas or liquid fuel or CCUS (carbon controlled us) through solar catalysis.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features may be equivalently replaced, and the modifications or the replacements may not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A process for calcining cement clinker by using new energy stably is characterized in that raw materials are preheated to 700 ℃ plus material temperature of 300 through a preheater unit and then fed into a solar energy decomposition reactor, the energy temperature absorbed by the solar energy decomposition reactor reaches 1300 ℃ plus material temperature of 900, the raw materials are decomposed, the decomposition rate reaches 80-92%, the decomposed hot raw materials enter a rotary kiln for calcining, the fuel of the rotary kiln adopts green hydrogen and/or biological fuel to provide heat, the temperature in the kiln reaches 1500 ℃ plus material temperature, and the raw materials fall into a kiln head cooling machine for cooling after being discharged from the kiln, so that a clinker finished product is obtained.
2. The process for calcining cement clinker by using new energy stably according to claim 1, characterized in that, when solar energy is sufficient, part of the hot raw meal decomposed by the solar energy decomposition reactor can be cooled and then enter a storage warehouse; when the solar energy is insufficient, feeding decomposed raw materials stored in the storage warehouse into a tail smoke chamber of the rotary kiln; the hot air that cools the hot raw meal is directed to the decomposing furnace for recycling before it is stored in the storage.
3. The process for the stable use of new energy sources for the calcination of cement clinker according to claim 1, characterized in that the exhaust gases of said preheater unit are either fed to a solar energy decomposition reactor and/or kiln head cooler or separately used for carbon capture.
4. The process for calcining cement clinker with stable use of new energy source as claimed in claim 3, characterized in that exhaust gas entering into the solar energy decomposition reactor and/or CO generated from hot raw material in the solar energy decomposition reactor2Transporting the carbon dioxide to a carbon capture and utilization system, and under the action of a catalyst, adding water and CO2Preparing synthesis gas or liquid fuel; or, the exhaust gas entering the solar decomposition reactor, and/or CO produced by the hot raw meal inside the solar decomposition reactor2A final preheater delivered to the preheater unit; or, the exhaust gas entering the solar decomposition reactor, and/or CO produced by the hot raw meal inside the solar decomposition reactor2One part is sent to the carbon capture utilization system and one part is sent to the final preheater of the preheater unit.
5. The process for calcining cement clinker by using new energy stably according to claim 1, characterized in that the kiln head cooler uses the exhaust gas of the preheater unit or the ambient air to cool the clinker, and the gas after heat exchange with the clinker is re-introduced into the rotary kiln.
6. The process for calcining cement clinker by using new energy stably as claimed in claim 1, wherein when the illumination condition is insufficient or the solar energy decomposition reactor equipment is overhauled, the heat of the decomposition furnace is supplemented by the biofuel, and the oxygen required by the combustion of the biofuel is introduced through an air supplement port at the lower part of the decomposition furnace for air supplement.
7. The utility model provides a system for stably use new forms of energy to calcine cement clinker, includes preheater unit, dore furnace, rotary kiln, kiln head cooler, its characterized in that still includes solar energy decomposition reactor and solar mirror field, be provided with the branch material valve on the penultimate level preheater bottom discharging pipe of preheater unit, a way and the solar energy decomposition reactor pan feeding mouth of branch material valve are connected, solar energy decomposition reactor is used for absorbing the energy in solar mirror field decomposes the raw material, the discharge gate pipeline and the preheater income kiln material union coupling of solar energy decomposition reactor, the kiln head department of rotary kiln is provided with the biofuel entry.
8. The system for calcining cement clinker by using new energy stably as claimed in claim 7, further comprising a storage warehouse, wherein the discharge port pipeline of the solar energy decomposition reactor is further connected with the storage warehouse, so that the discharge port pipeline of the solar energy decomposition reactor is divided into two paths, and gate valves are respectively arranged on the two paths; a cooler for cooling the decomposed hot raw meal is arranged on a branch connected with the storage reservoir; the hot air outlet of the cooler is connected with the decomposing furnace; and a discharge hole at the bottom of the storage warehouse is connected with a smoke chamber at the tail of the rotary kiln.
9. The system for stably calcining cement clinker by using new energy source as claimed in claim 7, wherein the exhaust gas outlet of the preheater unit is connected with the air inlet of the solar energy decomposition reactor and/or the kiln head cooler.
10. The system for the stable use of new energy sources for the calcination of cement clinker according to claim 7, characterized in that the gas outlet of the solar energy decomposition reactor is connected to the inlet of the last preheater of the preheater unit; and the lower part of the decomposing furnace is provided with a biofuel supplement inlet and a biofuel supplement port.
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Cited By (1)
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| CN114870584A (en) * | 2022-05-25 | 2022-08-09 | 西安康桥能源技术有限责任公司 | Method for improving reduction efficiency and reducing nitrogen oxides in cement kiln |
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