CN111394149B - High-efficiency dry-method coal-saving combined auxiliary agent for cement kiln and application thereof - Google Patents
High-efficiency dry-method coal-saving combined auxiliary agent for cement kiln and application thereof Download PDFInfo
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- CN111394149B CN111394149B CN202010224038.2A CN202010224038A CN111394149B CN 111394149 B CN111394149 B CN 111394149B CN 202010224038 A CN202010224038 A CN 202010224038A CN 111394149 B CN111394149 B CN 111394149B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L9/00—Treating solid fuels to improve their combustion
- C10L9/10—Treating solid fuels to improve their combustion by using additives
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/04—Catalyst added to fuel stream to improve a reaction
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
- C10L2230/22—Function and purpose of a components of a fuel or the composition as a whole for improving fuel economy or fuel efficiency
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Abstract
The invention relates to the technical field of cement production, and particularly discloses a high-efficiency dry-method coal-saving combined auxiliary agent for a cement kiln and an application thereof. Comprises a component A and a component B; the preparation raw materials of the component A at least comprise 10-20 parts of wetting agent, 12-25 parts of dispersing activator, 25-40 parts of absorption catalyst and 36-50 parts of first carrier by weight; the raw materials for preparing the component B at least comprise 3-10 parts of catalyst, 15-25 parts of combustion improver, 1-7 parts of emulsifier, 1-5 parts of dispersant and 65-80 parts of second carrier in parts by weight.
Description
Technical Field
The invention relates to the technical field of cement production, in particular to a high-efficiency dry-method coal-saving combined auxiliary agent for a cement kiln and an application thereof.
Background
Coal resources are non-renewable resources, and are reduced with the annual large-scale exploitation and use, and a large amount of dust and carbon dioxide generated after coal combustion can generate adverse effects on the environment and climate, so that the reduction of coal consumption and carbon emission is a very important energy-saving and environment-friendly topic faced by all mankind.
Because the exploitation of Chinese coal resources is limited, China carries out planned consumption on the coal consumption index of a cement enterprise, and the coal consumption of the domestic advanced process technology is taken as an issuing index; after the cement enterprises are upgraded and modified by the self process, the cement enterprises still can not reach the advanced process indexes, and the cement enterprises can be brought into the capacity alignment; the coal saving technology of the dry-method kiln in the prior art has narrow adaptability, only has effect on the low-grade calorific value coal (below 5000 kilocalories of the base calorific value), has preference on the calorific value of the coal, has unobvious coal saving effect on the slightly high calorific value (above 5000 kilocalories of the base calorific value), and is difficult to spread in the market.
The cement industry is a large coal consumer, the burning heat consumption of each ton of cement clinker is about 100kg standard coal, the yield of each year of the cement clinker in the whole country is more than 13 hundred million tons, the standard coal is consumed by more than 1.3 hundred million tons each year, which is equivalent to 1.82 hundred million tons of 5000 kilocalories of physical coal, and the energy-saving potential is huge.
Therefore, the problem to be solved is to provide an efficient dry-method coal-saving composite additive for the cement kiln, so as to reduce the energy consumption in the process of obtaining cement clinker.
Disclosure of Invention
In order to solve the technical problems, the invention provides an efficient dry-method coal-saving composite auxiliary agent for a cement kiln, which comprises a component A and a component B; the preparation raw materials of the component A at least comprise 10-20 parts of wetting agent, 12-25 parts of dispersing activator, 25-40 parts of absorption catalyst and 36-50 parts of first carrier by weight; the raw materials for preparing the component B at least comprise 3-10 parts of catalyst, 15-25 parts of combustion improver, 1-7 parts of emulsifier, 1-5 parts of dispersant and 65-80 parts of second carrier in parts by weight.
In a preferred embodiment of the present invention, the humectant is one or more selected from polyethylene glycol, hexylene glycol, propylene glycol, and glycerin.
As a preferable technical scheme of the invention, the dispersion activating agent is N-methyldiethanolamine and/or diisopropanolamine.
As a preferred technical solution of the present invention, the absorption catalyst is triethanolamine and/or diethanolamine.
In a preferred embodiment of the present invention, the first carrier is water or an aqueous solution of sodium carbonate.
As a preferable technical scheme, the high-efficiency dry-method coal-saving composite auxiliary agent for the cement kiln according to claim 1 is characterized in that the catalyst is a nano rare earth metal oxide.
As a preferable technical scheme of the invention, the nano rare earth metal oxide is selected from one or more of titanium dioxide, cerium dioxide and lanthanum oxide.
In a preferred embodiment of the present invention, the combustion improver is one or more selected from potassium nitrate, potassium chlorate, sodium nitrate, and sodium chlorate.
In a preferred embodiment of the present invention, the emulsifier is an anionic surfactant.
The second aspect of the invention provides application of the high-efficiency dry-method coal-saving composite auxiliary agent for the cement kiln, and the application field is the technical field of cement production.
Has the advantages that: the invention provides an efficient dry-method cement kiln coal-saving combined auxiliary agent and application thereof, which are combined with the process characteristics of producing clinker by a novel dry-method cement enterprise, originally create the problem solving point, and simultaneously exert force from two ends of raw materials and fuel, and adopt the combined catalytic auxiliary agent through innovative technical thought to realize the catalysis of the calcinations of the raw materials and the combustion of the fuel and play the role of superposed catalysis, thereby finally saving coal and reducing energy consumption, helping the cement enterprise to realize advanced coal consumption index and helping the cement enterprise to enter the high-quality technical development stage.
Detailed Description
The disclosure may be understood more readily by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
The term "prepared from …" as used herein is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.
The conjunction "consisting of …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.
When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when a range of "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2 and 4 to 5", "1 to 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.
The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
Approximating language, as used herein throughout the specification and claims, is intended to modify a quantity, such that the invention is not limited to the specific quantity, but includes portions that are literally received for modification without substantial change in the basic function to which the invention is related. Accordingly, the use of "about" to modify a numerical value means that the invention is not limited to the precise value. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value. In the present description and claims, range limitations may be combined and/or interchanged, including all sub-ranges contained therein if not otherwise stated.
In addition, the indefinite articles "a" and "an" preceding an element or component of the invention are not intended to limit the number requirement (i.e., the number of occurrences) of the element or component. Thus, "a" or "an" should be read to include one or at least one, and the singular form of an element or component also includes the plural unless the stated number clearly indicates that the singular form is intended.
In order to solve the technical problems, the invention provides a high-efficiency dry-method coal-saving composite additive for a cement kiln, which comprises a component A and a component B; the preparation raw materials of the component A at least comprise 10-20 parts of wetting agent, 12-25 parts of dispersing activator, 25-40 parts of absorption catalyst and 36-50 parts of first carrier by weight; the raw materials for preparing the component B at least comprise 3-10 parts of catalyst, 15-25 parts of combustion improver, 1-7 parts of emulsifier, 1-5 parts of dispersant and 65-80 parts of second carrier in parts by weight.
In a preferred embodiment, the high-efficiency dry-method cement kiln coal-saving combination auxiliary agent comprises a component A and a component B; the preparation raw materials of the component A at least comprise 11-17 parts of wetting agent, 15-21 parts of dispersing activator, 31-35 parts of absorption catalyst and 41-47 parts of first carrier by weight; the raw materials for preparing the component B at least comprise 5-8 parts of catalyst, 19-21 parts of combustion improver, 3-5 parts of emulsifier, 1-3 parts of dispersant and 70-75 parts of second carrier in parts by weight.
In a most preferred embodiment, the high-efficiency dry-method cement kiln coal-saving combination auxiliary agent comprises a component A and a component B; the preparation raw materials of the component A at least comprise 15 parts of wetting agent, 18 parts of dispersing activator, 33 parts of absorption catalyst and 15 parts of first carrier in parts by weight; the preparation raw materials of the component B at least comprise 6 parts of catalyst, 20 parts of combustion improver, 4 parts of emulsifier, 2 parts of dispersant and 73 parts of second carrier by weight.
Component A
The raw materials for preparing the component A at least comprise 10-20 parts of wetting agent, 12-25 parts of dispersing activator, 25-40 parts of absorption catalyst and 36-50 parts of first carrier.
The component A belongs to a raw material end catalytic assistant, is applied to a raw material end, accelerates the reaction and absorption of carbon dioxide in a calcium carbonate decomposition product, and promotes the decomposition of calcium carbonate and inhibits or hinders the reversible reaction of the calcium carbonate, so that the absorption of heat in the decomposition process of the calcium carbonate is reduced, and the effects of saving coal and reducing consumption are further realized.
In a preferred embodiment, the blending proportion of the A component is 0.03% of the yield of the feed.
In a preferred embodiment, the preparation method of the A component comprises the following steps: adding the first carrier into a reaction kettle, adding the absorption catalyst into the reaction kettle, stirring for 3-5 minutes, adding the dispersion activating agent into the reaction kettle, stirring for 3-5 minutes, and finally adding the wetting agent into the reaction kettle, stirring for 3-5 minutes to obtain the catalyst.
Wetting agent
The wetting agent is a substance which can enable solid materials to be more easily wetted by water. The solid material is wetted by reducing its surface tension or interfacial tension, allowing water to spread on or penetrate the surface of the solid material.
In a preferred embodiment, the humectant of the present invention is selected from one or more of polyethylene glycol, hexylene glycol, propylene glycol, and glycerin.
In a more preferred embodiment, the wetting agent of the present invention is polyethylene glycol.
In a preferred embodiment, the polyethylene glycol of the present invention has a molecular weight of 200-600.
In a most preferred embodiment, the polyethylene glycol of the present invention has a molecular weight of 400.
Dispersion activator
In a preferred embodiment, the dispersion activator is N-methyldiethanolamine and/or diisopropanolamine.
The N-methyldiethanolamine is a chemical substance with the molecular formula of C5H13NO2. The hydroxyl groups reduce vapor pressure, increase solubility, facilitate absorption of acid gas, improve concentration, reduce circulation and reduce energy consumption.
The diisopropanolamine of the invention has the appearance character of white crystalline solid, has the smell similar to ammonia, is pre-mixed with water, and is used for removing hydrogen sulfide and carbon dioxide from natural gas and refinery gas.
In a more preferred embodiment, the dispersion activator of the present invention is N-methyldiethanolamine and diisopropanolamine, wherein the mass ratio of N-methyldiethanolamine to diisopropanolamine is 1: (0.8-1.6).
In a most preferred embodiment, the dispersion activator of the present invention is N-methyldiethanolamine and diisopropanolamine, wherein the mass ratio of N-methyldiethanolamine to diisopropanolamine is 1: 1.
absorption catalyst
In a preferred embodiment, the absorption catalyst according to the invention is triethanolamine and/or diethanolamine.
The triethanolamine provided by the invention is colorless to light yellow transparent viscous liquid with slight ammonia smell, and becomes colorless to light yellow cubic crystal system crystals at low temperature. When exposed to air, the color gradually darkens. Is easily soluble in water, ethanol, acetone, glycerol, ethylene glycol, etc., is slightly soluble in benzene, diethyl ether, carbon tetrachloride, etc., and is hardly soluble in nonpolar solvents. Can be regarded as trihydroxy substitute of triethylamine. Similar to other amine compounds, because of the lone pair of electrons on the nitrogen atom, triethanolamine has weak alkalinity and can react with inorganic acid or organic acid to generate salt.
The Chinese name of the diethanolamine is 2,2' -dihydroxydiethylamine and diethanolamine; bis-hydroxyethyl amine; 2,2' -iminobisethanol: english abbreviation DEA. Colorless viscous liquid or crystals. It is alkaline and can absorb gases such as carbon dioxide and hydrogen sulfide in air.
In a more preferred embodiment, the absorption catalyst of the present invention is triethanolamine and diethanolamine, wherein the mass ratio of the triethanolamine to the diethanolamine is 1: (1-1.5).
In a most preferred embodiment, the absorption catalyst of the present invention is triethanolamine and diethanolamine, wherein the mass ratio of the triethanolamine to the diethanolamine is 1: 1.
first carrier
In a preferred embodiment, the first carrier of the present invention is water or an aqueous solution of sodium carbonate.
In a most preferred embodiment, the first carrier of the present invention is an aqueous solution of sodium carbonate, wherein the mass fraction of sodium carbonate is 1%.
B component
The raw materials for preparing the component B at least comprise 3-10 parts of catalyst, 15-25 parts of combustion improver, 1-7 parts of emulsifier, 1-5 parts of dispersant and 65-80 parts of second carrier.
The component B belongs to a fuel end catalytic auxiliary agent, and is applied to a fuel end, and in the using process, the fuel end catalytic auxiliary agent and coal fuel are ground together, so that on one hand, the whole particle size of pulverized coal particles is optimized through physical action, and the combustion characteristic of the pulverized coal is improved; on the other hand, under the high-temperature environment of the kiln, the coal dust particles can be effectively cracked and the combustion rate of the coal dust particles is catalyzed through the photocatalysis of the nano-scale rare earth catalyst, so that the phenomenon that fuel does little useless work and does more useful work in a thermal system of the kiln is greatly reduced or avoided, and the purposes of saving coal and reducing consumption are achieved.
In a preferred embodiment, the blending proportion of the B component is 0.055 percent of the total using amount of the coal.
In a preferred embodiment, the preparation method of the component B comprises the following steps: adding a carrier into a reaction kettle, sequentially adding nano rare earth metal oxide titanium dioxide, cerium dioxide and lanthanum oxide into the kettle respectively, stirring for 3-5 minutes at intervals, adding an emulsifier into the kettle, stirring for 3-5 minutes, adding a combustion improver into the kettle, stirring for 3-5 minutes, and finally adding a dispersant into the kettle, stirring for 3-5 minutes to obtain the catalyst.
Catalyst and process for preparing same
In a preferred embodiment, the catalyst of the present invention is a nano rare earth metal oxide.
In a more preferred embodiment, the nano rare earth metal oxide of the present invention is selected from one or more of titanium dioxide, cerium dioxide and lanthanum oxide.
In a more preferred embodiment, the nano rare earth metal oxide of the present invention is titanium dioxide, cerium dioxide and lanthanum oxide, wherein the mass ratio of titanium dioxide, cerium dioxide and lanthanum oxide is 1: 1: (0.5-1.5).
In a most preferred embodiment, the nano rare earth metal oxide of the present invention is titanium dioxide, cerium dioxide and lanthanum oxide, wherein the mass ratio of titanium dioxide, cerium dioxide and lanthanum oxide is 1: 1: 1.
combustion improver
The combustion improver refers to a substance which cannot be combusted per se but can generate oxygen required for combustion. In a broad sense, additives used to improve combustion conditions are combustion improvers. The combustion improver comprises a combustion accelerator, a slurry dispersing agent, a water separating agent, an ash modifier, an emulsifier and a catalyst.
In a preferred embodiment, the combustion improver is one or more selected from potassium nitrate, potassium chlorate, sodium nitrate and sodium chlorate.
In a more preferred embodiment, the combustion improver is sodium nitrate and sodium chlorate, wherein the mass ratio of the sodium nitrate to the sodium chlorate is (7: 3) - (9: 1).
In a most preferred embodiment, the combustion improver of the present invention is sodium nitrate and sodium chlorate, wherein the mass ratio of sodium nitrate to sodium chlorate is 8: 2.
emulsifier
The emulsifier is a compound which can form stable emulsion by a mixed solution of two or more immiscible components; can improve the surface tension between various constituent phases in the emulsion to form a uniform dispersion or emulsion.
In a preferred embodiment, the emulsifier of the present invention is an anionic surfactant.
In a more preferred embodiment, the anionic surfactant according to the present invention is selected from one or more of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, sodium dodecyl sulfonate, and sodium phosphate.
In a most preferred embodiment, the anionic surfactant of the present invention is sodium dodecyl sulfate.
Dispersing agent
The dispersant of the present invention is a material capable of uniformly dispersing solid and liquid particles of inorganic and organic pigments which are difficult to dissolve in a liquid, and also capable of preventing the particles from settling and coagulating to form a stable suspension.
In a preferred embodiment, the dispersant of the present invention is adipic acid.
Carrier
In a preferred embodiment, the second support of the present invention is water or an aqueous nitric acid solution.
In a more preferred embodiment, the second support of the present invention is an aqueous solution of nitric acid, wherein the volume of nitric acid is 0.3% to 0.5% of the volume of water.
In a most preferred embodiment, the second support of the present invention is an aqueous solution of nitric acid, wherein the volume of nitric acid is 0.4% of the volume of water.
The second aspect of the invention provides application of the high-efficiency dry-method coal-saving composite auxiliary agent for the cement kiln, and the application field is the technical field of cement production.
It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the raw materials used are commercially available from national chemical reagents, unless otherwise specified.
Examples
In order to better understand the above technical solutions, the following detailed descriptions will be provided with reference to specific embodiments. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention. In addition, the raw materials are commercially available and the extraction methods of the extract are all conventional extraction methods, if not otherwise specified.
Example 1
Embodiment 1 provides a high-efficiency dry-method coal-saving composite additive for a cement kiln, which comprises a component A and a component B; the preparation raw materials of the component A comprise 15 parts of wetting agent, 18 parts of dispersing activator, 33 parts of absorption catalyst and 15 parts of first carrier in parts by weight; the preparation raw materials of the component B comprise 6 parts of catalyst, 20 parts of combustion improver, 4 parts of emulsifier, 2 parts of dispersant and 73 parts of second carrier by weight.
The preparation method of the component A comprises the following steps: adding the first carrier into a reaction kettle, adding the absorption catalyst into the reaction kettle, stirring for 4 minutes, adding the dispersion activating agent into the reaction kettle, stirring for 3 minutes, and finally adding the wetting agent into the reaction kettle, and stirring for 5 minutes to obtain the catalyst.
The wetting agent is polyethylene glycol.
The molecular weight of the polyethylene glycol is 400.
The dispersing activator is N-methyldiethanolamine and diisopropanolamine, wherein the mass ratio of the N-methyldiethanolamine to the diisopropanolamine is 1: 1.
the absorption catalyst comprises triethanolamine and diethanolamine, wherein the mass ratio of the triethanolamine to the diethanolamine is 1: 1.
the first carrier is a sodium carbonate aqueous solution, wherein the mass fraction of sodium carbonate is 1%.
The preparation method of the component B comprises the following steps: adding a carrier into a reaction kettle, sequentially adding nano rare earth metal oxide titanium dioxide, cerium dioxide and lanthanum oxide into the kettle respectively, stirring at intervals for 3 minutes, adding an emulsifier into the kettle, stirring for 5 minutes, adding a combustion improver into the kettle, stirring for 5 minutes, and finally adding a dispersant into the kettle, stirring for 4 minutes to obtain the catalyst.
The catalyst is nano rare earth metal oxide.
The nanometer rare earth metal oxide comprises titanium dioxide, cerium dioxide and lanthanum oxide, wherein the mass ratio of the titanium dioxide to the cerium dioxide to the lanthanum oxide is 1: 1: 1.
the combustion improver comprises sodium nitrate and sodium chlorate, wherein the mass ratio of the sodium nitrate to the sodium chlorate is 8: 2.
the emulsifier is an anionic surfactant.
The anionic surfactant is sodium dodecyl sulfate.
The dispersant is adipic acid.
The second carrier is a nitric acid aqueous solution, wherein the volume of the nitric acid accounts for 0.4% of the volume of the water.
Example 2
Embodiment 2 provides a high-efficiency dry-method coal-saving composite additive for a cement kiln, which comprises a component A and a component B; the preparation raw materials of the component A comprise 10 parts of wetting agent, 12 parts of dispersing activator, 25 parts of absorption catalyst and 36 parts of first carrier by weight; the preparation raw materials of the component B comprise, by weight, 3 parts of a catalyst, 15 parts of a combustion improver, 1 part of an emulsifier, 1 part of a dispersant and 65 parts of a second carrier.
The preparation method of the component A comprises the following steps: adding the first carrier into a reaction kettle, adding the absorption catalyst into the reaction kettle, stirring for 4 minutes, adding the dispersion activating agent into the reaction kettle, stirring for 3 minutes, and finally adding the wetting agent into the reaction kettle, and stirring for 5 minutes to obtain the catalyst.
The wetting agent is polyethylene glycol.
The molecular weight of the polyethylene glycol is 400.
The dispersing activator is N-methyldiethanolamine and diisopropanolamine, wherein the mass ratio of the N-methyldiethanolamine to the diisopropanolamine is 1: 1.
the absorption catalyst comprises triethanolamine and diethanolamine, wherein the mass ratio of the triethanolamine to the diethanolamine is 1: 1.
the first carrier is a sodium carbonate aqueous solution, wherein the mass fraction of sodium carbonate is 1%.
The preparation method of the component B comprises the following steps: adding a carrier into a reaction kettle, sequentially adding nano rare earth metal oxide titanium dioxide, cerium dioxide and lanthanum oxide into the kettle respectively, stirring at intervals for 3 minutes, adding an emulsifier into the kettle, stirring for 5 minutes, adding a combustion improver into the kettle, stirring for 5 minutes, and finally adding a dispersant into the kettle, stirring for 4 minutes to obtain the catalyst.
The catalyst is nano rare earth metal oxide.
The nanometer rare earth metal oxide comprises titanium dioxide, cerium dioxide and lanthanum oxide, wherein the mass ratio of the titanium dioxide to the cerium dioxide to the lanthanum oxide is 1: 1: 1.
the combustion improver comprises sodium nitrate and sodium chlorate, wherein the mass ratio of the sodium nitrate to the sodium chlorate is 8: 2.
the emulsifier is an anionic surfactant.
The anionic surfactant is sodium dodecyl sulfate.
The dispersant is adipic acid.
The second carrier is a nitric acid aqueous solution, wherein the volume of the nitric acid accounts for 0.4% of the volume of the water.
Example 3
Embodiment 3 provides a high-efficiency dry-method coal-saving composite additive for a cement kiln, which comprises a component A and a component B; the preparation raw materials of the component A comprise 20 parts of wetting agent, 25 parts of dispersing activator, 40 parts of absorption catalyst and 50 parts of first carrier by weight; the preparation raw materials of the component B comprise, by weight, 10 parts of a catalyst, 25 parts of a combustion improver, 7 parts of an emulsifier, 5 parts of a dispersant and 80 parts of a second carrier.
The preparation method of the component A comprises the following steps: adding the first carrier into a reaction kettle, adding the absorption catalyst into the reaction kettle, stirring for 4 minutes, adding the dispersion activating agent into the reaction kettle, stirring for 3 minutes, and finally adding the wetting agent into the reaction kettle, and stirring for 5 minutes to obtain the catalyst.
The wetting agent is polyethylene glycol.
The molecular weight of the polyethylene glycol is 400.
The dispersing activator is N-methyldiethanolamine and diisopropanolamine, wherein the mass ratio of the N-methyldiethanolamine to the diisopropanolamine is 1: 1.
the absorption catalyst comprises triethanolamine and diethanolamine, wherein the mass ratio of the triethanolamine to the diethanolamine is 1: 1.
the first carrier is a sodium carbonate aqueous solution, wherein the mass fraction of sodium carbonate is 1%.
The preparation method of the component B comprises the following steps: adding a carrier into a reaction kettle, sequentially adding nano rare earth metal oxide titanium dioxide, cerium dioxide and lanthanum oxide into the kettle respectively, stirring at intervals for 3 minutes, adding an emulsifier into the kettle, stirring for 5 minutes, adding a combustion improver into the kettle, stirring for 5 minutes, and finally adding a dispersant into the kettle, stirring for 4 minutes to obtain the catalyst.
The catalyst is nano rare earth metal oxide.
The nanometer rare earth metal oxide comprises titanium dioxide, cerium dioxide and lanthanum oxide, wherein the mass ratio of the titanium dioxide to the cerium dioxide to the lanthanum oxide is 1: 1: 1.
the combustion improver comprises sodium nitrate and sodium chlorate, wherein the mass ratio of the sodium nitrate to the sodium chlorate is 8: 2.
the emulsifier is an anionic surfactant.
The anionic surfactant is sodium dodecyl sulfate.
The dispersant is adipic acid.
The second carrier is a nitric acid aqueous solution, wherein the volume of the nitric acid accounts for 0.4% of the volume of the water.
Example 4
Embodiment 4 provides a high-efficiency dry-method coal-saving composite additive for a cement kiln, which comprises a component A, wherein the preparation raw materials of the component A comprise 15 parts by weight of a wetting agent, 18 parts by weight of a dispersing activator, 33 parts by weight of an absorption catalyst and 15 parts by weight of a first carrier.
The preparation method of the component A comprises the following steps: adding the first carrier into a reaction kettle, adding the absorption catalyst into the reaction kettle, stirring for 4 minutes, adding the dispersion activating agent into the reaction kettle, stirring for 3 minutes, and finally adding the wetting agent into the reaction kettle, and stirring for 5 minutes to obtain the catalyst.
The wetting agent is polyethylene glycol.
The molecular weight of the polyethylene glycol is 400.
The dispersing activator is N-methyldiethanolamine and diisopropanolamine, wherein the mass ratio of the N-methyldiethanolamine to the diisopropanolamine is 1: 1.
the absorption catalyst comprises triethanolamine and diethanolamine, wherein the mass ratio of the triethanolamine to the diethanolamine is 1: 1.
the first carrier is a sodium carbonate aqueous solution, wherein the mass fraction of sodium carbonate is 1%.
Example 5
Embodiment 5 provides a high-efficiency dry-method coal-saving composite additive for a cement kiln, which comprises a component B; the preparation raw materials of the component B comprise 6 parts of catalyst, 20 parts of combustion improver, 4 parts of emulsifier, 2 parts of dispersant and 73 parts of second carrier by weight.
The preparation method of the component B comprises the following steps: adding a carrier into a reaction kettle, sequentially adding nano rare earth metal oxide titanium dioxide, cerium dioxide and lanthanum oxide into the kettle respectively, stirring at intervals for 3 minutes, adding an emulsifier into the kettle, stirring for 5 minutes, adding a combustion improver into the kettle, stirring for 5 minutes, and finally adding a dispersant into the kettle, stirring for 4 minutes to obtain the catalyst.
The catalyst is nano rare earth metal oxide.
The nanometer rare earth metal oxide comprises titanium dioxide, cerium dioxide and lanthanum oxide, wherein the mass ratio of the titanium dioxide to the cerium dioxide to the lanthanum oxide is 1: 1: 1.
the combustion improver comprises sodium nitrate and sodium chlorate, wherein the mass ratio of the sodium nitrate to the sodium chlorate is 8: 2.
the emulsifier is an anionic surfactant.
The anionic surfactant is sodium dodecyl sulfate.
The dispersant is adipic acid.
The second carrier is a nitric acid aqueous solution, wherein the volume of the nitric acid accounts for 0.4% of the volume of the water.
Evaluation of Performance
1. Coal saving rate: the high-efficiency dry-method coal-saving composite additive for the cement kiln, which is provided by the examples 1 to 3, is applied to the cement dry kiln, and the coal-saving rate of the high-efficiency dry-method coal-saving composite additive is tested by using the bituminous coal 2 (the coal quality parameters are shown in the table III), and the results are shown in the following table 1.
TABLE 1
| Examples | Example 1 | Example 2 | Example 3 |
| Coal saving rate/% | 9 | 8 | 7 |
2. Experimental results of the crude end catalyst promoter
The component A (raw meal end catalytic promoter) prepared in example 4 is applied to a cement production process, and index tests are carried out according to the GB/T26566-2011 cement raw meal easy-burning test method, and the results are shown in the following table 2, wherein blank indicates that no catalytic promoter is added at the raw meal end.
TABLE 2
3. Experimental results of Fuel end catalyst Assistant
The component B (fuel-end catalytic promoter), the agent C, and the agent D provided in example 5 were added to bituminous coal 1, bituminous coal 2, anthracite 3, and anthracite 4, respectively, and calcined, and their coal saving indices were measured by an atmospheric thermogravimetric analysis method, and the results were shown in tables 3, 4, 5, and 6 below, in comparison with bituminous coal 1, bituminous coal 2, anthracite 3, and anthracite 4 to which no coal saving agent was added.
Wherein, the agent C is a coal saving agent of Guangdong FF company; the agent D is coal-saving agent of Anhui ZZ company.
TABLE 3
TABLE 4
TABLE 5
TABLE 6
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (2)
1. An efficient dry-method coal-saving composite auxiliary agent for a cement kiln is characterized by comprising a component A and a component B; the preparation raw materials of the component A at least comprise 10-20 parts of wetting agent, 12-25 parts of dispersing activator, 25-40 parts of absorption catalyst and 36-50 parts of first carrier by weight; the raw materials for preparing the component B at least comprise 3-10 parts of catalyst, 15-25 parts of combustion improver, 1-7 parts of emulsifier, 1-5 parts of dispersant and 65-80 parts of second carrier in parts by weight; the component A belongs to a raw material end catalytic auxiliary agent applied to a raw material end;
the wetting agent is polyethylene glycol;
the dispersing activator is N-methyldiethanolamine and/or diisopropanolamine;
the absorption catalyst is triethanolamine and/or diethanolamine;
the first carrier is water or sodium carbonate aqueous solution;
the catalyst is a nano rare earth metal oxide; the nano rare earth metal oxide is titanium dioxide, cerium dioxide and lanthanum oxide;
the combustion improver is sodium nitrate and sodium chlorate;
the emulsifier is an anionic surfactant; the anionic surfactant is sodium dodecyl sulfate; the dispersant is adipic acid;
the second carrier is water or a nitric acid aqueous solution.
2. The application of the high-efficiency dry-method cement kiln coal-saving combined auxiliary agent as claimed in claim 1 is characterized in that the application field is the technical field of cement production.
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