CN113636769B - Burner and method for reducing carbon emission in cement clinker production - Google Patents
Burner and method for reducing carbon emission in cement clinker production Download PDFInfo
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- CN113636769B CN113636769B CN202110863181.0A CN202110863181A CN113636769B CN 113636769 B CN113636769 B CN 113636769B CN 202110863181 A CN202110863181 A CN 202110863181A CN 113636769 B CN113636769 B CN 113636769B
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- air outlet
- combustor
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- 239000004568 cement Substances 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 12
- 238000000034 method Methods 0.000 title abstract description 15
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 22
- GALOTNBSUVEISR-UHFFFAOYSA-N molybdenum;silicon Chemical compound [Mo]#[Si] GALOTNBSUVEISR-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000003345 natural gas Substances 0.000 claims abstract description 11
- 238000005485 electric heating Methods 0.000 claims abstract description 9
- 239000003245 coal Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 6
- 239000007921 spray Substances 0.000 claims description 2
- 125000002619 bicyclic group Chemical group 0.000 claims 5
- 239000000463 material Substances 0.000 abstract description 6
- 239000003034 coal gas Substances 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 238000005245 sintering Methods 0.000 abstract description 2
- 238000001354 calcination Methods 0.000 description 9
- 239000011398 Portland cement Substances 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000010881 fly ash Substances 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000003469 silicate cement Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000002956 ash Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
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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
- C04B7/46—Burning; Melting electric
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/0019—Circuit arrangements
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
- H05B3/148—Silicon, e.g. silicon carbide, magnesium silicide, heating transistors or diodes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
Abstract
The invention relates to a method and equipment for reducing carbon emission in cement clinker production. A method for reducing carbon emission in cement clinker production is characterized in that: 1) Adopting electric heating to provide heat for completing the heat required by cement clinker production; 2) The device of the invention is used for replacing the existing burner for sintering the cement clinker, namely, the clinker is produced by using heat generated by electric heating to replace the heat generated by burning coal powder or natural gas; 3) Intelligent control, and the temperature can be continuously adjusted within the range of 0-1500 ℃. The equipment is characterized by comprising a hanger, wherein a walking trolley is arranged on the hanger, a heater is arranged below the walking trolley, and the heater is provided with three air channels, five air inlets, five air outlets and two layers of silicon-molybdenum rods; the heater is provided with an intelligent electric control system, and the temperature, the wind speed and the wind volume are continuously controllable and adjustable; and the outermost layer of the heater is provided with a high-thermal-conductivity dustproof material. The method and the equipment are suitable for enterprises which produce cement and use pulverized coal or natural gas for combustion to provide heat.
Description
Technical Field
The invention relates to a combustor for reducing carbon emission in cement clinker production and a method thereof, belonging to the technical field of building materials.
Background
CO of cement industry 2 The emission of CO mainly comes from the calcination decomposition of limestone and the combustion of pulverized coal 2 According to data statistics, the cement production accounts for 8 percent of the global carbon dioxide emission, wherein the Chinese cement production accounts for 57 percent of the world, and the Chinese cement production emits CO 2 Occupies CO of the whole world 2 4.56% of the discharge amount. According to the industry statistics, 940kg of CO is emitted when 1 ton of cement is produced 2 In 2020, the cement yield in China is 23.77 million tons, and the carbon dioxide is 22.34 million tons.
The silicate cement clinker is prepared by using limestone and clay as main raw materials, crushing, blending, grinding to prepare raw materials, and calcining in a cement kiln. Slag portland cement is called slag cement for short. It is composed of Portland cement clinker, 20-70% of granulated blast furnace slag and a proper amount of gypsum. The pozzolanic portland cement is abbreviated as pozzolanic cement. It is composed of silicate cement clinker, 20% -50% of volcanic ash mixed material and proper quantity of gypsum. The fly ash portland cement is called fly ash cement for short. It is composed of silicate cement clinker, 20% -40% of fly ash and proper quantity of gypsum. Calcination of clinkerAs the name implies, raw material is cooked. Calcination varies from kiln type to kiln type. At present, the domestic kiln type has a wet kiln; dry-process kilns, including hollow kilns, SP (without decomposing furnace), new dry-process kilns; the semidry process includes a vertical kiln and a vertical Bohr kiln. Several important temperatures are now introduced: 1.CaCO 3 —CaO+CO 2 The decomposition temperature is 890 ℃, mgCO 3 —MgO+CO 2 The decomposition temperature is 590 ℃, so the temperature of the decomposing furnace is controlled to be about 900 ℃;2.C 3 S can be formed only after the liquid phase appears, and the liquid phase temperature is 1250 ℃, so the clinker firing temperature is 1300-1450 ℃ (material temperature). 3.C 3 S——C 2 S——C 3 A——C 4 AF minimum eutectic temperature of 1338 ℃ is below which mineral formation is difficult. (see Baidu encyclopedia for details)https://baike.baidu.com/item/Portland cement clinker).
The Chinese patent application (application publication No. CN102519246, publication date 2012.06.27) discloses an atmosphere-controllable high-speed rotary kiln, wherein the rotary kiln is heated by more than two silicon-molybdenum rods, the silicon-molybdenum rods are transversely and uniformly distributed on the outer side of a pre-rotary kiln body, and heat-insulating materials are filled between the silicon-molybdenum rods and a box body for isolation, so that a heating system is formed (paragraph 0026 in the specification). Taking calcined limestone particles as an example: 823060, calcining at 900 deg.C for half an hour while maintaining the temp. (paragraph 0030 of the specification). Heating for decomposition, wherein the drying and preheating stage is carried out at 920 ℃ for 15-20MIN; the calcining temperature range is controlled to be 920 ℃ to 970 ℃. The highest temperature of the calcination temperature of the patent application is 970 ℃, and the temperature can not reach 1300-1450 ℃ required by the calcination of cement clinker. The main problem that the calcination temperature can not be exceeded by 970 ℃ in the patent application is caused by the structural defects, specifically speaking, "the silicon-molybdenum bars in the application are transversely and uniformly distributed outside the pre-rotary furnace body, and the silicon-molybdenum bars and the box body are filled with heat-insulating materials for isolation to form a heating system. The heat generated by the silicon-molybdenum rod needs to heat the rotary kiln through heat conduction and then heats materials through the rotary kiln, and the structure has low thermal conductivity on one hand, and on the other hand, if the heat of the silicon-molybdenum rod is increased, the rotary kiln and the heat-insulating material thereof cannot bear higher temperature. All the rotary kilns of this patent application are not suitable for cement clinker production.
Aims at the common adoption of coal powder or natural gas as fuel to burn and produce clinker and discharge a large amount of CO in domestic and foreign cement clinker production enterprises 2 The method and the equipment for reducing carbon emission in cement clinker production replace the existing method for burning clinker by using coal powder or natural gas to generate heat and a burner thereof, and CO is reduced 2 Discharge and improve social benefits.
Disclosure of Invention
The invention aims to provide a burner for reducing carbon emission in cement clinker production and a method thereof, and the method and the burner are suitable for enterprises which produce cement and use pulverized coal or natural gas for combustion to provide heat.
In order to achieve the purpose, the technical scheme of the invention is as follows: a method for reducing carbon emission in cement clinker production is characterized in that:
1) Adopting electric heating to provide heat for completing the heat required by cement clinker production;
2) The burner of the invention is used for replacing the existing burner for sintering cement clinker, namely, the electric heating heat is used for generating heat to replace the coal powder or natural gas to generate heat for producing the clinker;
3) Intelligent control, and the temperature can be continuously adjusted within the range of 0-1500 ℃.
A combustor for reducing carbon emission in cement clinker production is characterized in that: the air conditioner is characterized in that the air conditioner is lifted by a hanger (1) and fixed in a certain height space, a walking trolley (2) is driven by a motor on the hanger to move continuously and freely, a fan is connected with air inlets (3), (5) and (7) respectively, three air streams enter from different channels and are sprayed out from different air outlets and do not interfere with each other, heat generated by a burner is provided by two layers of silicon-molybdenum rods (9) and (11), the generated heat is sprayed out by five types of air outlets (10), (12) and (13) and is taken out by a high-heat-conductivity dustproof shell (14), each air outlet is provided with a dustproof net, the angles of the air outlets (10) and (12) are 30, and the air outlets (10) and (12) are 30 respectively.
The combustor comprises a hanger (1), a walking trolley (2) is arranged on the hanger, a heater is arranged below the walking trolley, and the heater is provided with three air channels (4), (6) and (8), five air inlets (3), (5) and (7), five air outlets (10), (12) and (13) and two layers of silicon-molybdenum rods (9) and (11); the heater is provided with an intelligent electric control system, and the temperature, the wind speed and the wind volume are continuously controllable and adjustable; the outermost layer of the heater is provided with a high-thermal-conductivity dustproof material (14). The method and the burner are suitable for enterprises producing cement and providing heat by burning pulverized coal or natural gas.
The combustor has the advantages that:
1) Pure electric heating is adopted to replace the existing method for producing cement clinker by burning coal dust or natural gas at home and abroad, and CO generated by burning coal dust or natural gas is reduced 2 Carbon emission in the production process of the cement industry is reduced;
2) The burner has a simple structure and is convenient to replace and install;
3) The combustor fully considers the dustproof problems of the use working conditions, including the angle of an air outlet, a protective net, a shell and the like;
4) The combustor adopts an intelligent control method, so that the operation of production personnel is facilitated.
Drawings
FIG. 1 is a front view of the burner of the present invention
FIG. 2 is a top view of the burner of the present invention
FIG. 3 is a right side view of the burner of the present invention
Wherein: 1. the device comprises a hanging bracket, 2, a traveling trolley, 3, a central air pipe air inlet, 4, a central air pipe, 5, a double-ring air pipe air inlet, 6, a double-ring air pipe, 7, a triple-ring air pipe air inlet, 8, a triple-ring air pipe, 9, an inner silicon-molybdenum rod, 10, a double-ring air outlet, 11, an outer silicon-molybdenum rod, 12, a triple-ring air outlet, 13, a central air pipe air outlet, 14 and a high-heat-conduction-material dustproof shell.
Detailed Description
Example 1:
a method for reducing carbon emissions from cement clinker production, comprising the steps of:
1) The heat required by the production of cement clinker is completed by adopting the heat generated by electric heating;
2) The burner is electrified to enable the silicon-molybdenum rods (9) and (11) to generate heat, the fans of the five air inlets (3), (5) and (7) are opened, air flow enters through three different ventilation channels (4), (6) and (8), the heat generated by the silicon-molybdenum rods (9) and (11) is sprayed out from the five air outlets (10), (12) and (13) and is taken out from the high-heat-conductivity dustproof shell (14), and the heat required by cement clinker production is provided;
3) The burner replaces the existing burner for firing cement clinker, namely, the electric heating heat is used for generating heat to replace the coal powder or natural gas to generate heat for producing the clinker;
4) The temperature is continuously adjustable within the range of 0-1500 ℃ by an intelligent control system.
The combustor is characterized in that a hanger (1) of the combustor is lifted and fixed in a space with a certain height, an electric control system controls a walking trolley (2) to continuously and freely move on the hanger (1), a fan is respectively connected with air inlets (3), (5) and (7), three strands of air respectively enter from different channels (4), (6) and (8) and spray out from different air outlets (10), (12) and (13) without mutual interference, heat generated by the combustor is provided by two layers of silicon-molybdenum rods (9) and (11) after being electrified, the generated heat is sprayed out from five types of air outlets (10), (12) and (13) and is taken out from a high-heat-conduction dustproof shell (14), each air outlet is provided with a high-temperature-resistant dustproof net, the angles of the air outlets (10) and (12) are 30 degrees, the air outlets (10) and (12) are respectively 30 and are connected by bolts and can be timely updated and replaced according to the use condition. The temperature of the silicon-molybdenum rod and the air quantity and the air speed of different air ducts are adjusted through an intelligent control system, so that the temperature can be continuously adjusted within the range of 0-1500 ℃, and the requirements of various production working conditions are met.
The sizes of all parts of the combustor can be adjusted according to the heat required by production, and the combustors with different specifications and models can be produced.
Claims (1)
1. A burner for reducing carbon emissions from cement clinker production, the burner providing the heat required for cement clinker production; the combustor is characterized in that the combustor is hoisted and fixed in a certain height space by a hoisting frame (1), a walking trolley (2) can continuously and freely move on the hoisting frame under the drive of a motor, a fan is respectively connected with a central air pipe air inlet (3), a dicyclic air pipe air inlet (5) and a tricyclic air pipe air inlet (7), three air streams respectively enter and spray out from different air outlets from a central air pipe (4), a dicyclic air pipe (6) and a tricyclic air pipe (8) without mutual interference, heat generated by the combustor is provided by an inner layer silicon-molybdenum rod (9) and an outer layer silicon-molybdenum rod (11), the generated heat is sprayed out from a dicyclic air outlet (10), a tricyclic air outlet (12) and a central air pipe air outlet (13) and taken out from a high-heat-conduction dustproof shell (14), each air outlet is provided with a dustproof net, the angles of the dicyclic air outlet (10) and the tricyclic air outlet (12) are 30 degrees, the dicyclic air outlet (10) and the tricyclic air outlet (12) are respectively, and the combustor is provided with an electric control intelligent system, and the temperature, the air speed and the air volume can be continuously controlled and adjusted; the temperature of the generated heat is continuously adjustable within the range of 0-1500 ℃; the combustor adopts electric heating to provide heat required by cement clinker production, namely the electric heating is used for generating heat to replace coal powder or natural gas to generate heat for producing clinker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110863181.0A CN113636769B (en) | 2021-07-29 | 2021-07-29 | Burner and method for reducing carbon emission in cement clinker production |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110863181.0A CN113636769B (en) | 2021-07-29 | 2021-07-29 | Burner and method for reducing carbon emission in cement clinker production |
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| Publication Number | Publication Date |
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| CN113636769A CN113636769A (en) | 2021-11-12 |
| CN113636769B true CN113636769B (en) | 2023-03-31 |
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| CN114477812A (en) * | 2022-01-12 | 2022-05-13 | 成都建筑材料工业设计研究院有限公司 | Low-carbon, low-nitrogen and coal-saving cement clinker sintering system and production method |
| CN115159877B (en) * | 2022-07-06 | 2023-05-26 | 西安康桥能源技术有限责任公司 | Method for producing cement clinker by using electric power or natural gas as driving heat source |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2529083Y (en) * | 2002-04-02 | 2003-01-01 | 王姝森 | Rotary kiln five-duct coal burner |
| US6764544B2 (en) * | 2002-12-23 | 2004-07-20 | Lafarge Canada Inc. | Process for incorporating coal ash into cement clinker |
| DE102008023898B3 (en) * | 2008-05-16 | 2009-07-02 | Polysius Ag | Producing cement clinker, comprises preheating raw material in pre-heater, calcinating preheated raw material in calcinator, combusting deacidified raw material in furnace to form cement clinker, and cooling burnt cement clinker in cooler |
| CN102519246A (en) * | 2011-12-31 | 2012-06-27 | 西安建筑科技大学 | Atmosphere-controllable high-speed rotary kiln |
| CN211177900U (en) * | 2019-07-30 | 2020-08-04 | 唐山不锈钢有限责任公司 | Double-channel fuel burner of rotary kiln |
| CN112723705B (en) * | 2020-12-30 | 2022-08-16 | 山东大学 | Method for using sludge subjected to calcium-increasing drying pretreatment as main raw material and fuel for cement production |
| CN112923357A (en) * | 2021-04-07 | 2021-06-08 | 南京建安机械制造有限公司 | Low-nitrogen energy-saving full-automatic six-duct pulverized coal burner |
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