CN114163151B - By using CO 2 Carbon emission reduction method and system for storing solar energy to calcine cement clinker - Google Patents

By using CO 2 Carbon emission reduction method and system for storing solar energy to calcine cement clinker Download PDF

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CN114163151B
CN114163151B CN202111395116.6A CN202111395116A CN114163151B CN 114163151 B CN114163151 B CN 114163151B CN 202111395116 A CN202111395116 A CN 202111395116A CN 114163151 B CN114163151 B CN 114163151B
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preheater
row
preheater unit
kiln
solar
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CN114163151A (en
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马娇媚
彭学平
武晓萍
李波
王伟
王佳硕
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Tianjin Cement Industry Design and Research Institute Co Ltd
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Tianjin Cement Industry Design and Research Institute Co Ltd
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    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44—Burning; Melting
    • 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
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • C04B7/44—Burning; Melting
    • C04B7/4407—Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D13/00—Apparatus for preheating charges; Arrangements for preheating charges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • Y02P40/18—Carbon capture and storage [CCS]

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Furnace Details (AREA)

Abstract

The invention discloses a method for utilizing CO 2 A carbon emission reduction method and a carbon emission reduction system for storing solar energy to calcine cement clinker are characterized in that raw materials are preheated by a preheater unit in a row A and a preheater unit in a row B and then fed into a decomposition reactor to be decomposed, the decomposed hot raw materials enter a rotary kiln to be calcined, clean fuel is adopted as the rotary kiln fuel, and the raw materials are discharged from the kiln and fall into a kiln head cooler to be cooled after being calcined to obtain the clinker; flue gas generated by decomposing raw materials in the decomposition reactor enters the A-row preheater unit to preheat raw materials, and high-concentration CO discharged from the A-row preheater unit 2 The flue gas enters a solar heat collector to absorb the energy of a solar field, the temperature is raised to 900-1300 ℃, and the flue gas is recycled to the decomposition reactor; and the flue gas discharged from the kiln enters a preheater unit B for preheating raw materials and then enters a grinding system. The invention adopts solar energy and hydrogen energy to replace 100 percent of the fuel of the existing cement production line, avoids the generation of fuel carbon emission, and has high concentration CO 2 And the carbon is isolated independently, so that the carbon enrichment, purification and utilization cost is reduced.

Description

By using CO 2 Carbon emission reduction method and system for storing solar energy to calcine cement clinker
Technical Field
The invention relates to the technical field of environment-friendly cement, in particular to a cement prepared by utilizing CO 2 A carbon emission reduction method and system for calcining cement clinker by storing solar energy.
Background
Fossil energy is the most main energy consumed in the world, the proportion of fossil energy in the energy consumed in the world in 2006 is up to 87.9%, and the proportion of China is up to 93.8%. With the continuous exploitation of mankind, the exhaustion of fossil energy is inevitable, and most of the fossil energy is almost exploited throughout this century. On the other hand, due to the increase of CO as a greenhouse gas in the use process of fossil energy 2 And meanwhile, some polluted smoke can be generated, so that the global ecology is threatened. Thus, cleaner renewable energy development with CO augmentation 2 The path of utilization is the main direction of future development. Eastern electric group, etcThe novel carbon dioxide energy storage application is positively promoted to fall to the ground, and the basic principle is that in the electricity utilization valley period, carbon dioxide gas at normal temperature and normal pressure is compressed into liquid by using redundant electric power, and heat energy generated in the compression process is stored; in the peak period of electricity utilization, the stored heat energy is utilized to heat the liquid carbon dioxide to a gas state, and a turbine (steam turbine) is driven to generate electricity.
The energy consumption of cement production is mainly from clinker production process, about 94%, and the energy type analysis mainly comes from coal and electricity, wherein the coal provides about 94% of energy, so that the dependence of cement industry on fossil energy, especially coal, is very large. Under the pressure of carbon emission reduction, the consumption of fossil energy needs to be reduced in the cement industry, and the physicochemical characteristic of decomposition and heat absorption of carbonate in the cement production process is utilized to develop a method for utilizing CO 2 The process method for storing solar energy, further realizing the calcination of cement clinker by new energy and realizing zero carbon emission is very significant, so that the proportion of fossil energy is reduced.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a method for utilizing CO 2 Carbon emission reduction method and system for storing solar energy and calcining cement clinker, and CO generated by decomposing carbonate in preparation process of cement clinker 2 Ground characteristics, using CO 2 As an energy storage medium, the energy-saving cement production method solves the problem that the existing cement production depends on fossil energy, greatly reduces the fuel carbon emission in the cement production process by utilizing solar energy and hydrogen energy, and creates basic conditions for producing zero fossil fuel and zero carbon emission by using cement clinker.
The invention is realized by using CO 2 A carbon emission reduction method for storing solar energy to calcine cement clinker, wherein raw materials are preheated to 300-800 ℃ by a preheater unit in a row A and a preheater unit in a row B and then fed into a decomposition reactor to be decomposed, the decomposition rate reaches 80-92%, the hot raw materials decomposed by the decomposition reactor enter a rotary kiln to be calcined, clean fuel is adopted to provide heat for the rotary kiln, the temperature in the kiln reaches 900-1500 ℃, and the hot raw materials after being discharged from the kiln are cooled by a kiln head cooler to obtain a clinker finished product;
decomposition reactionFlue gas generated by decomposing raw materials in the preheater enters the preheater unit in the row A to exchange heat with raw materials in the preheater unit in the row A, and high-concentration CO discharged from the preheater unit in the row A 2 The flue gas enters a solar heat collector to absorb the energy of a solar field, the temperature is raised to 900-1300 ℃, and the flue gas is recycled to the decomposition reactor to decompose raw materials;
and (4) enabling the flue gas discharged from the kiln to enter a preheater unit in the row B, preheating raw materials of the preheater unit in the row B, and then entering a grinding system.
Preferably, the waste gas at the outlet of the B-column preheater unit enters a waste gas treatment system after passing through a grinding system, the waste gas treatment system is subjected to desulfurization, denitrification and dust removal, water-gas separation is carried out, the separated water is electrolyzed to prepare hydrogen and oxygen, and then the hydrogen and oxygen are sent to the rotary kiln to be used as energy supply.
Preferably, the high concentration of CO entering the solar collector 2 The flue gas can also be conveyed to a gas making system to carry out photo-thermal catalytic reaction to prepare synthetic gas or liquid fuel, so that carbon utilization is realized.
Preferably, when the light condition is insufficient, the decomposition reactor supplements heat through clean fuel, and oxygen required by combustion of the clean fuel is introduced through an air supplement port at the lower part of the decomposition reactor for air supplement.
Preferably, the air required for clean fuel combustion of the rotary kiln is derived from kiln head cooler heat recovery air.
By using CO 2 The carbon emission reduction system for storing the solar energy to calcine the cement clinker comprises a preheater unit, a rotary kiln, a kiln head cooler, a decomposition reactor, a solar mirror field and a solar heat collector, wherein the preheater unit is divided into an A-row preheater unit and a B-row preheater unit;
a discharge port at the bottom of the penultimate secondary preheater of the A-column preheater unit is connected with a material inlet of the decomposition reactor, the solar heat collector absorbs the energy of the solar mirror field, and the high-concentration CO of the solar heat collector 2 The flue gas output port is connected with the hot flue gas input port at the bottom of the decomposition reactor, the top outlet of the decomposition reactor is connected with the inlet of the last-stage preheater of the A-column preheater unit, and the A-column preheater unitThe discharge hole at the bottom of the final preheater is connected with a kiln tail smoke chamber of the rotary kiln; the waste gas outlet of the preheater unit in the column A is connected with a solar heat collector;
a bottom discharge port of a penultimate secondary preheater of the B-row preheater unit is connected with a smoke outlet pipeline of a kiln tail smoke chamber, the smoke outlet pipeline of the kiln tail smoke chamber is connected with an inlet of a final preheater of the B-row preheater unit, and a bottom discharge port of the final preheater of the B-row preheater unit is connected with a material inlet of a decomposition reactor; the waste gas outlet of the B-column preheater unit is connected with a grinding system;
and a clean fuel inlet is formed in the kiln head of the rotary kiln.
Preferably, the grinding system is connected with a waste gas treatment system, the waste gas treatment system is connected with a water-gas separation system, a water outlet of the water-gas separation system is connected with an electrolysis device, and the electrolysis device is connected with a clean fuel inlet of the rotary kiln.
Preferably, the lower part of the decomposition reactor is provided with a clean fuel supplement inlet and a supplement tuyere so as to perform necessary energy supplement when the light condition is insufficient.
The invention has the following advantages and beneficial effects:
1. the system changes the current situation that the cement clinker production depends on fossil fuels such as coal and the like in the prior art, adopts solar energy and hydrogen energy to replace 100 percent of the fuel of the existing cement production line, and avoids the generation of fuel carbon emission in the cement clinker production process.
2. The carbon emissions of traditional cement clinker production result from fuel combustion and calcium carbonate decomposition, and due to large air entrainment, CO in the flue gas 2 The concentration is 15-35%, compared with the original cement production line, the invention decomposes the CO generated by the calcium carbonate 2 The decomposition reactor and the A-row preheater unit are isolated independently, the purity of the decomposition reactor is high, one part of the decomposition reactor can be used as a solar energy storage medium, and the rest part of the decomposition reactor can be directly used for preparing synthesis gas or organic fuel for carbon utilization, so that the cost of carbon enrichment, purification and utilization is reduced.
3. The rotary kiln accounts for about 40% of fuel in the traditional cement clinker production, and the kiln tail decomposing furnace accounts for 60% of fuelThe 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, and uses low-concentration CO at the outlet of the rotary kiln 2 The flue gas passes through the preheater units in the row B to heat the raw meal, and the heat recovery is carried out, and the flue gas and the high-concentration CO at the outlet of the preheater units in the row A 2 The flue gas is separated and treated independently, thereby avoiding reducing CO 2 The concentration of (c).
4. Aiming at the existing cement plant, the invention can reserve the original main machine equipment of a preheater unit, a decomposing furnace, a rotary kiln, a kiln head cooler and the like, and newly build a solar mirror field, a solar heat collector and hydrogen energy transmission.
Drawings
FIG. 1 shows the utilization of CO according to an embodiment of the present invention 2 Storing a flow diagram of a carbon abatement system for calcining cement clinker using solar energy;
FIG. 2 shows the utilization of CO provided by the second embodiment of the present invention 2 A flow diagram of a carbon abatement system for storing solar calcined cement clinker.
In the figure: 1. a solar mirror field; 2. a solar heat collector; 3. a decomposition reactor; 4-1, column a preheater unit; 4-2, column B preheater units; 5. a rotary kiln; 6. a clean fuel inlet; 7. kiln head 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 should be noted that, unless explicitly stated or limited otherwise, 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.
Example 1
Referring to FIG. 1, the present embodiment provides a method for utilizing CO 2 The carbon emission reduction system for storing the solar energy to calcine the cement clinker comprises an A-row preheater unit 4-1, a B-row preheater unit 4-2, a rotary kiln 5, a kiln head cooler 7, a decomposition reactor 3, a solar mirror field 1 and a solar heat collector 2; a discharge port at the bottom of a penultimate secondary preheater of the A-column preheater unit 4-1 is connected with a material inlet of a decomposition reactor 3, the solar heat collector 2 absorbs the energy of the solar mirror field 1, and the hot CO of the solar heat collector 2 2 A flue gas output port is connected with a hot flue gas input port at the bottom of the decomposition reactor 3, an outlet at the top of the decomposition reactor 3 is connected with an inlet of a final preheater of the preheater unit 4-1 in the row A, and a discharge port at the bottom of the final preheater of the preheater unit 4-1 in the row A is connected with a kiln tail smoke chamber of the rotary kiln 5; the waste gas outlet of the A-column preheater unit 4-1 is connected with the solar heat collector 2; a bottom discharge port of a penultimate secondary preheater of the B-row preheater unit 4-2 is connected with a smoke outlet pipeline of a kiln tail smoke chamber, the smoke outlet pipeline of the kiln tail smoke chamber is connected with a last-stage preheater inlet of the B-row preheater unit 4-2, and a bottom discharge port of a last-stage preheater of the B-row preheater unit 4-2 is connected with a material inlet of the decomposition reactor 3; the waste gas outlet of the B-column preheater unit 4-2 is connected with a grinding system; and a clean fuel inlet 6 is arranged at the kiln head of the rotary kiln 5.
The specific method comprises the following steps: preheating raw materials to 300-800 ℃ through a row A preheater unit 4-1 and a row B preheater unit 4-2, feeding the raw materials into a decomposition reactor 3 for decomposition, wherein the decomposition rate reaches 80-92%, the hot raw materials decomposed by the decomposition reactor 3 enter a rotary kiln 5 for calcination, the fuel of the rotary kiln 5 adopts clean fuel (such as hydrogen energy and the like) to provide heat, the air required by fuel combustion is air recovered by a kiln head cooler 7, the temperature in the kiln reaches 900-1500 ℃, and the hot raw materials fall into the kiln head cooler 7 for cooling after being discharged from the kiln after being fired to obtain a clinker finished product;
flue gas generated by decomposing the raw materials in the decomposition reactor 3 enters the A-row preheater unit 4-1, and after heat exchange with the raw materials in the A-row preheater unit 4-1 is completed, the temperature of the flue gas is reduced to 200-600 ℃, and then the flue gas enters the solar collector 2 to absorb solar mirrorsThe energy temperature of the field 1 is raised to 900-1300 ℃, and the energy temperature is recycled to the decomposition reactor 3 to decompose preheated raw materials; the energy for decomposing the preheated raw meal in the decomposition reactor 3 comes from the high-temperature circulating energy storage medium, namely high-concentration CO heated by the solar heat collector 2 2 Flue gas, high concentration CO 2 Flue gas CO production for carbonate energy storage process from solar collector 2 2 And CO produced by decomposition of raw meal 2 . High concentration CO returning to solar collector 2 2 The residual flue gas can be used as an energy storage medium to return to the decomposition reactor 3, and the residual flue gas can be conveyed to a gas preparation system to carry out photo-thermal catalytic reaction to prepare CO and H 2 Synthesis gas or liquid fuel to realize carbon utilization.
Flue gas CO discharged from kiln 2 Low concentration, entering a preheater unit 4-2 in the row B, preheating partial raw meal, lowering the temperature of the raw meal, entering a grinding system and then carrying out waste gas treatment.
The lower part of the decomposition reactor 3 is provided with a clean fuel supplement inlet and an air supplement port, when the illumination condition is insufficient, the decomposition reactor 3 can supplement heat by supplementing clean fuel, and oxygen required by combustion of the clean fuel is introduced into the decomposition reactor 3 through the air supplement port at the lower part of the decomposition reactor for air supplement.
CO from solar collector 2 in the invention 2 And CO produced by decomposition of raw meal 2 The raw materials are fed into a decomposition reactor 3 together, the decomposition reactor 3 decomposes the raw materials by absorbing energy brought by high-temperature circulating energy storage media, the decomposed hot raw materials are fed into a rotary kiln 5 for calcination, the decomposed flue gas is fed into an A-column preheater unit 4-1, the raw materials are preheated in the A-column preheater unit 4-1, the temperature of the raw materials is reduced, and the outlet of the A-column preheater unit 4-1 is high-concentration CO 2 Circularly enters the solar heat collector 2, absorbs solar energy again to be used as an energy storage medium to return to the decomposition reactor 3, and the redundant part can be conveyed to a gas making system to carry out photo-thermal catalytic reaction to prepare synthetic gas or liquid fuel, so that the cost of carbon enrichment, purification and utilization is reduced, and the carbon utilization is realized.
Example 2
Please refer to fig. 2, in order to further utilize CO 2 Storage of solar energy for calcination of cement clinkerAt present, zero carbon emission is generated in cement production, in this embodiment, preferably, a waste gas treatment system is connected behind the grinding system, the waste gas treatment system is connected with a water-gas separation system, a water outlet of the water-gas separation system is connected with an electrolysis device, and the electrolysis device is connected with the clean fuel inlet 6 of the rotary kiln 5. Flue gas at the outlet of the preheater unit 4-2 in the column B enters a waste gas treatment system after passing through a grinding system, and is subjected to desulfurization, denitrification and dust removal in the waste gas treatment system, wherein the two links are the flow of a normal cement process, a water-gas separation system is additionally arranged on the basis, so that the flue gas subjected to desulfurization, denitrification and dust removal enters the water-gas separation system for water-gas separation, other gases except water are discharged into the atmosphere, and the separated water is electrolyzed by an electrolysis device to prepare hydrogen and oxygen and then is sent to the rotary kiln 5 to be supplied as fuel required by the rotary kiln 5. The hydrogen is produced by the process of the cement plant, so that the cost of purchased hydrogen energy is reduced, and the supply of fuel is achieved.
In conclusion, the invention greatly reduces the consumption of primary fossil energy and utilizes CO generated by decomposing the carbonate of the cement raw material 2 As a solar energy storage medium, the system improves the stability and scale of the system, can produce cement clinker by reducing fossil fuel consumption, and reduces carbon emission in the cement production process.
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 (5)

1. By using CO 2 The carbon emission reduction method for storing the solar energy calcined cement clinker is characterized in that raw materials are preheated to 300-800 ℃ by the preheater units in the A row and the preheater units in the B row, then are fed into a decomposition reactor for decomposition, the decomposition rate reaches 80-92 percent, and are decomposed by the decomposition reactorThe hot raw material enters a rotary kiln for calcination, clean fuel is used for providing heat for the rotary kiln, the temperature in the kiln reaches 900-1500 ℃, and the hot raw material falls into a kiln head cooler for cooling after being discharged from the kiln after calcination is finished, so that a finished clinker product is obtained;
the flue gas generated by decomposing the raw material in the decomposition reactor enters the preheater unit in the row A to exchange heat with the raw material of the preheater unit in the row A, and the high-concentration CO discharged from the preheater unit in the row A 2 The flue gas enters a solar heat collector to absorb the energy of a solar field, the temperature is raised to 900-1300 ℃, and the flue gas is recycled to the decomposition reactor to decompose raw materials;
the flue gas discharged from the kiln enters a preheater unit in the row B, and enters a grinding system after raw materials of the preheater unit in the row B are preheated;
waste gas at the outlet of the B-row preheater unit enters a waste gas treatment system after passing through a grinding system, water-gas separation is carried out after the waste gas treatment system is subjected to desulfurization, denitrification and dust removal, separated water is electrolyzed to prepare hydrogen and oxygen, and then the hydrogen and the oxygen are sent to a rotary kiln to be used as energy supply;
high concentration CO entering solar collector 2 The flue gas can also be conveyed to a gas making system to carry out photo-thermal catalytic reaction to prepare synthesis gas or liquid fuel;
when the illumination condition is insufficient, the decomposition reactor supplements heat through clean fuel, and oxygen required by combustion of the clean fuel is introduced through an air supplement port at the lower part of the decomposition reactor.
2. The utilization of CO of claim 1 2 The carbon emission reduction method for calcining the cement clinker by storing the solar energy is characterized in that air required by combustion of clean fuel of the rotary kiln is heat recovery air of a kiln head cooler.
3. By using CO 2 The carbon emission reduction system for storing the solar energy to calcine the cement clinker comprises a preheater unit, a rotary kiln and a kiln head cooler, and is characterized by further comprising a decomposition reactor, a solar mirror field and a solar heat collector, wherein the preheater unit is divided into an A-row preheater unit and a B-row preheater unit;
a discharge port at the bottom of the penultimate secondary preheater of the A-column preheater unit is connected with a material inlet of the decomposition reactor, the solar heat collector absorbs the energy of the solar mirror field, and the high-concentration CO of the solar heat collector 2 A flue gas output port is connected with a hot flue gas input port at the bottom of the decomposition reactor, an outlet at the top of the decomposition reactor is connected with an inlet of a final preheater of the preheater unit A, and a discharge port at the bottom of the final preheater of the preheater unit A is connected with a kiln tail smoke chamber of the rotary kiln; the waste gas outlet of the preheater unit in the column A is connected with a solar heat collector;
the bottom discharge port of the penultimate secondary preheater of the preheater unit B is connected with the smoke outlet pipeline of the kiln tail smoke chamber, the smoke outlet pipeline of the kiln tail smoke chamber is connected with the inlet of the final preheater of the preheater unit B, and the bottom discharge port of the final preheater of the preheater unit B is connected with the material inlet of the decomposition reactor; the waste gas outlet of the B-row preheater unit is connected with a grinding system;
and a clean fuel inlet is arranged at the kiln head of the rotary kiln.
4. The utilization of CO of claim 3 2 The carbon emission reduction system for storing the solar calcined cement clinker is characterized in that the grinding system is connected with a waste gas treatment system, the waste gas treatment system is connected with a water-gas separation system, a water outlet of the water-gas separation system is connected with an electrolysis device, and the electrolysis device is connected with a clean fuel inlet of the rotary kiln.
5. The utilization of CO of claim 3 2 The carbon emission reduction system for storing the solar calcined cement clinker is characterized in that a clean fuel supplement inlet and an air supplement port are formed in the lower portion of the decomposition reactor, so that necessary energy supplement can be performed when the illumination condition is insufficient.
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CN112654828A (en) * 2019-08-12 2021-04-13 天津水泥工业设计研究院有限公司 Cement predecomposition kiln system and method for preparing cement clinker

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DE102012105977B4 (en) * 2012-07-04 2015-11-05 Thyssenkrupp Industrial Solutions Ag Process and plant for the production of cement clinker from cement raw meal
CN107235647A (en) * 2017-06-30 2017-10-10 中国建筑材料科学研究总院 Oxygen/carbon dioxide combustion technology applied to cement clinker production technology
CN107860238B (en) * 2017-10-14 2019-06-25 上海柯来浦能源科技有限公司 The commercial plant of zero-emission

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CN112654828A (en) * 2019-08-12 2021-04-13 天津水泥工业设计研究院有限公司 Cement predecomposition kiln system and method for preparing cement clinker

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