CN111548835A - Environment-friendly clean coal and preparation method thereof - Google Patents
Environment-friendly clean coal and preparation method thereof Download PDFInfo
- Publication number
- CN111548835A CN111548835A CN202010202168.6A CN202010202168A CN111548835A CN 111548835 A CN111548835 A CN 111548835A CN 202010202168 A CN202010202168 A CN 202010202168A CN 111548835 A CN111548835 A CN 111548835A
- Authority
- CN
- China
- Prior art keywords
- weight
- coal
- parts
- environment
- anthracite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
-
- 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
-
- 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
Abstract
The invention relates to an environment-friendly clean coal and a preparation method thereof, wherein the environment-friendly clean coal comprises 595-680 parts by weight of anthracite, 170-255 parts by weight of bituminous coal, 3-5 parts by weight of a desulfurization and denitrification agent, 1-3 parts by weight of urea, 1-3 parts by weight of calcium lactate, 0.3-0.5 part by weight of a catalyst, 1-3 parts by weight of a binder and 8-15 parts by weight of water. The environment-friendly clean coal provided by the invention fully fills the materials with different particle sizes into the coal powder, SO that SO is generated when the clean coal is combusted2、NOxThe standard discharge is achieved, the soft coal and the anthracite are inflammable when being used together, the sufficient combustion is ensured, the additive filled in the molded coal fully plays a role, and SO is added2With NOx left in the ash to form metal salts and the combustion process is reduced to N2Reduce SO2、NOxThe aim of clean combustion is fundamentally realized by discharging pollutants, and the bituminous coal is prepared by adding various coal-fired cleaning additives into the mixture ratio of bituminous coal and anthraciteThe environment-friendly clean briquette improves the utilization of coal resources and improves economic benefits.
Description
Technical Field
The invention relates to coal and a preparation method thereof, in particular to environment-friendly clean coal and a preparation method thereof.
Background
China is a large coal consuming country, and coal accounts for about 70% of primary energy consumption, wherein about 70% of the primary energy consumption is used for direct combustion or power generation. The average sulfur content of commodity coal in China is 1.01%, and the main atmospheric pollutants discharged by fire coal include smoke dust and SO2、NOx、CO2Etc. in which SO is discharged from the coal2Accounting for 87 percent of the total discharge of various pollution sources.
Coal is still the main source of energy in China in a considerable period in the future. Especially in winter heating season, northern rural areas are still heated by directly burning coal, and the generated waste gas brings great harm to the atmospheric environment.
Disclosure of Invention
The invention aims to provide an environment-friendly clean coal briquette and a preparation method thereof, which are used for improving the utilization rate of coal resources and enabling bulk coal to burn SO2、NOxDischarge after reaching the standard, and has higher environmental benefit and social benefit.
In order to achieve the purpose, the invention provides an environment-friendly clean coal briquette, which comprises 595-680 parts by weight of anthracite, 170-255 parts by weight of bituminous coal, 3-5 parts by weight of a desulfurization and denitrification agent, 1-3 parts by weight of urea, 1-3 parts by weight of calcium lactate, 0.3-0.5 part by weight of a catalyst, 1-3 parts by weight of a binder and 8-15 parts by weight of water.
Preferably, the desulfurization and denitrification agent comprises 1-3 parts by weight of a mixture of combustion improver magnesium oxide and magnesium acetate.
Preferably, the catalyst is nano titanium dioxide, silicon oxide, iron oxide and/or copper oxide.
Preferably, the binder is modified starch, polyvinyl alcohol, sodium polyacrylate and/or sodium carboxymethyl cellulose.
Preferably, the binder is modified starch, polyvinyl alcohol, sodium polyacrylate and/or sodium carboxymethyl cellulose.
Preferably, the particle size of the anthracite is less than 3mm, and the particle size of the bituminous coal is 5-15 mm.
The invention also provides an environment-friendly clean coal briquette which comprises 680 parts by weight of anthracite, 170 parts by weight of bituminous coal, 3 parts by weight of desulfurization and denitrification agent, 1.5 parts by weight of urea, 1 part by weight of calcium lactate, 0.3 part by weight of catalyst, 1 part by weight of adhesive and 8 parts by weight of water.
The invention also aims to provide a preparation method of the environment-friendly clean coal, which comprises the following steps:
A. uniformly mixing 595-680 parts by weight of anthracite coal, 170-255 parts by weight of bituminous coal, 1-3 parts by weight of binder and 1-3 parts by weight of calcium lactate to obtain coal powder A;
B. mixing 3-5 parts by weight of a desulfurization and denitrification agent and 5-10 parts by weight of water to obtain a liquid B;
C. mixing 0.3-0.5 part by weight of catalyst and 1-3 parts by weight of urea, and adding the mixture into 3-5 parts by weight of water to obtain liquid C;
D. and mixing the liquid C with the liquid B, adding the coal powder A after uniformly stirring, stirring for 1-2 hours by using a mixer, and forming to obtain the environment-friendly clean coal.
Preferably, the desulfurization and denitrification agent comprises 1-3 parts by weight of a mixture of combustion improver magnesium oxide and magnesium acetate.
Preferably, the catalyst is nano titanium dioxide, silicon oxide, iron oxide and/or copper oxide.
Preferably, the binder is modified starch, polyvinyl alcohol, sodium polyacrylate and/or sodium carboxymethyl cellulose.
Preferably, the particle size of the anthracite is less than 3mm, and the particle size of the bituminous coal is 5-15 mm.
Based on the technical scheme, the invention has the advantages that:
the environment-friendly clean coal provided by the invention fully fills the materials with different particle sizes into the coal powder, SO that SO is generated when the clean coal is combusted2、NOxThe standard discharge is achieved, the soft coal and the anthracite are inflammable when being used together, the sufficient combustion is ensured, the additive filled in the molded coal fully plays a role, and SO is added2With NOx left in the ash to form metal salts and the combustion process is reduced to N2Reduce SO2、NOxThe pollutant is discharged, and the aim of clean combustion is fundamentally fulfilled.
According to the invention, various coal-fired cleaning additives are added in the ratio of the bituminous coal and the anthracite to prepare the environment-friendly clean coal, so that the utilization of coal resources is improved, and the economic benefit is improved.
Detailed Description
The technical solution of the present invention is further described in detail by the following examples.
The invention provides an environment-friendly clean briquette for SO in the process of burning bulk coal2、NOxThe emission exceeds standard, the problems of nonflammability and low burnout rate of the existing molded coal are solved, and the utilization rate of coal resources is increased.
Specifically, the environment-friendly clean coal comprises 595-680 parts by weight of anthracite, 170-255 parts by weight of bituminous coal, 3-5 parts by weight of a desulfurization and denitrification agent, 1-3 parts by weight of urea, 1-3 parts by weight of calcium lactate, 0.3-0.5 part by weight of a catalyst, 1-3 parts by weight of a binder and 8-15 parts by weight of water.
Preferably, the desulfurization and denitrification agent comprises 1-3 parts by weight of a mixture of combustion improver magnesium oxide and magnesium acetate. The catalyst is nano titanium dioxide, silicon oxide, iron oxide and/or copper oxide. The adhesive is modified starch, polyvinyl alcohol, sodium polyacrylate and/or sodium carboxymethyl cellulose.
Preferably, the particle size of the anthracite is less than 3mm, and the particle size of the bituminous coal is 5-15 mm.
The invention also provides an environment-friendly clean coal briquette which comprises 680 parts by weight of anthracite, 170 parts by weight of bituminous coal, 3 parts by weight of desulfurization and denitrification agent, 1.5 parts by weight of urea, 1 part by weight of calcium lactate, 0.3 part by weight of catalyst, 1 part by weight of adhesive and 8 parts by weight of water.
The environment-friendly clean coal provided by the invention fully fills the materials with different particle sizes into the coal powder, SO that SO is generated when the clean coal is combusted2、NOxThe standard discharge is achieved, the soft coal and the anthracite are inflammable when being used together, the sufficient combustion is ensured, the additive filled in the molded coal fully plays a role, and SO is added2With NOx left in the ash to form metal salts and the combustion process is reduced to N2Reduce SO2And NOx pollutants are discharged, so that the aim of clean combustion is fundamentally fulfilled.
The invention also provides a preparation method of the environment-friendly clean coal, which comprises the following steps:
A. uniformly mixing 595-680 parts by weight of anthracite coal, 170-255 parts by weight of bituminous coal, 1-3 parts by weight of binder and 1-3 parts by weight of calcium lactate to obtain coal powder A;
B. mixing 3-5 parts by weight of a desulfurization and denitrification agent and 5-10 parts by weight of water to obtain a liquid B;
C. mixing 0.3-0.5 part by weight of catalyst and 1-3 parts by weight of urea, and adding the mixture into 3-5 parts by weight of water to obtain liquid C;
D. and mixing the liquid C with the liquid B, adding the coal powder A after uniformly stirring, stirring for 1-2 hours by using a mixer, and forming to obtain the environment-friendly clean coal.
Preferably, the desulfurization and denitrification agent comprises 1-3 parts by weight of a mixture of combustion improver magnesium oxide and magnesium acetate. The catalyst is nano titanium dioxide, silicon oxide, iron oxide and/or copper oxide. The adhesive is modified starch, polyvinyl alcohol, sodium polyacrylate and/or sodium carboxymethyl cellulose.
Preferably, the particle size of the anthracite is less than 3mm, and the particle size of the bituminous coal is 5-15 mm. Because the environment-friendly clean coal briquette is prepared by fully mixing anthracite with the particle size of less than 3mm and bituminous coal with the particle size of 5-15 mm, adding the auxiliary agent to uniformly mix the auxiliary agent in the coal material, the environment-friendly clean coal briquette fully plays a role in the combustion process of the coal briquette, and can remarkably reduce SO2、NOxThe materials are uniformly dispersed in the molded coal to ensure that the molded coal is formed by discharging and pressingThe obtained briquette is inflammable and has good combustion effect.
According to the invention, various coal-fired cleaning additives are added in the ratio of the bituminous coal and the anthracite to prepare the environment-friendly clean coal, so that the utilization of coal resources is improved, and the economic benefit is improved.
Example 1
A. 680 kg of anthracite and 170 kg of bituminous coal are uniformly mixed, 1.5 kg of calcium lactate and 3 kg of adhesive are uniformly mixed, and a coal powder material A is obtained;
B. uniformly stirring 4 kg of desulfurization and denitrification agent and 5 kg of water to obtain liquid B;
B. 0.5 kg of catalyst and 3 kg of urea are mixed uniformly, and 5 kg of water is added to obtain liquid C;
C. and mixing the liquid C and the liquid B, mixing the liquid C and the liquid B into the coal material A, stirring the mixture for 1 to 2 hours by using a mixer, and forming to obtain the environment-friendly clean coal.
The waste of materials is reduced by combining the coal powder and the coal briquettes, and the coal powder is discarded as coal cinder in actual industrial production, so that resources are fully utilized. Pollutant SO2、NOxAre 18 and 32ppm, respectively, below the emission requirement of the (boiler) dust by a multiple.
Example 2
A. Uniformly mixing 640 kg of anthracite coal and 210 kg of bituminous coal, uniformly mixing 1 kg of calcium lactate and 3 kg of adhesive to obtain a coal powder material A, and uniformly stirring 4 kg of desulfurization and denitrification agent and 8 kg of water to obtain a liquid B;
B. 0.5 kg of catalyst was mixed with 3 kg of urea and 5 kg of water was added to obtain liquid C
C. And mixing the liquid C with the liquid B, mixing the liquid C with the coal material A, stirring the mixture for 1 to 2 hours by using a mixer, and forming to obtain the environment-friendly clean coal.
The waste of materials is reduced by combining the coal powder and the coal briquettes, and the coal powder is discarded as coal cinder in actual industrial production, so that resources are fully utilized. Pollutant SO2、NOxThe emissions of (co) are 8 and 18ppm, respectively, which are several times lower than the emission requirements of (boiler) dust.
Example 3
A. 595 kg of anthracite coal and 255 kg of bituminous coal are uniformly mixed, 3 kg of calcium lactate and 3 kg of adhesive are uniformly mixed, coal powder material A is added, and 3 kg of desulfurization and denitrification agent and 8 g of water are uniformly stirred to obtain liquid B;
B. 0.5 kg of catalyst and 3 kg of urea are mixed uniformly, and 5 kg of water is added to obtain liquid C;
C. and mixing the liquid C with the liquid B, mixing the liquid C with the coal material A, stirring the mixture for 1 to 2 hours by using a mixer, and forming to obtain the environment-friendly clean coal.
The waste of materials is reduced by combining the coal powder and the coal briquettes, and the coal powder is discarded as coal cinder in actual industrial production, so that resources are fully utilized. Pollutant SO2、NOxThe emissions of (co) are 16 and 28ppm, respectively, which are several times lower than the emission requirements of (boiler) dust.
Example 4
A. 680 kg of anthracite and 170 kg of bituminous coal are uniformly mixed, 2 kg of calcium lactate and 3 kg of adhesive are uniformly mixed, coal powder material A is pulverized, and 5 kg of desulfurization and denitrification agent and 8 g of water are uniformly stirred to obtain liquid B;
B. mixing 0.4 kg catalyst and 2 kg urea, adding 4 kg water to obtain liquid C;
C. and mixing the liquid C with the liquid B, mixing the liquid C with the coal material A, stirring the mixture for 1 to 2 hours by using a mixer, and forming to obtain the environment-friendly clean coal.
The waste of materials is reduced by combining the coal powder and the coal briquettes, and the coal powder is discarded as coal cinder in actual industrial production, so that resources are fully utilized. Pollutant SO2、NOxThe emissions of (co) are 17 and 22ppm, respectively, which are several times lower than the emission requirements of (boiler) dust.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.
Claims (10)
1. An environment-friendly clean briquette is characterized in that: the coal-fired boiler comprises 595-680 parts by weight of anthracite, 170-255 parts by weight of bituminous coal, 3-5 parts by weight of desulfurization and denitrification agent, 1-3 parts by weight of urea, 1-3 parts by weight of calcium lactate, 0.3-0.5 part by weight of catalyst, 1-3 parts by weight of binder and 8-15 parts by weight of water.
2. The clean coal briquette of claim 1, which is characterized in that: the desulfurization and denitrification agent comprises 1-3 parts by weight of a mixture of combustion improver magnesium oxide and magnesium acetate.
3. The clean coal briquette of claim 1, which is characterized in that: the catalyst is nano titanium dioxide, silicon oxide, iron oxide and/or copper oxide.
4. The clean coal briquette of claim 1, which is characterized in that: the adhesive is modified starch, polyvinyl alcohol, sodium polyacrylate and/or sodium carboxymethyl cellulose.
5. The clean coal briquette of claim 1, which is characterized in that: the particle size of the anthracite is smaller than 3mm, and the particle size of the bituminous coal is 5-15 mm.
6. An environment-friendly clean briquette is characterized in that: the coal tar desulfurization and denitrification catalyst comprises 680 parts by weight of anthracite, 170 parts by weight of bituminous coal, 3 parts by weight of desulfurization and denitrification agent, 1.5 parts by weight of urea, 1 part by weight of calcium lactate, 0.3 part by weight of catalyst, 1 part by weight of binder and 8 parts by weight of water.
7. The preparation method of the environment-friendly clean coal is characterized by comprising the following steps: the method comprises the following steps:
A. uniformly mixing 595-680 parts by weight of anthracite coal, 170-255 parts by weight of bituminous coal, 1-3 parts by weight of binder and 1-3 parts by weight of calcium lactate to obtain coal powder A;
B. mixing 3-5 parts by weight of a desulfurization and denitrification agent and 5-10 parts by weight of water to obtain a liquid B;
C. mixing 0.3-0.5 part by weight of catalyst and 1-3 parts by weight of urea, and adding the mixture into 3-5 parts by weight of water to obtain liquid C;
D. and mixing the liquid C with the liquid B, adding the coal powder A after uniformly stirring, stirring for 1-2 hours by using a mixer, and forming to obtain the environment-friendly clean coal.
8. The method for preparing environment-friendly clean coal as claimed in claim 7, which is characterized in that: the desulfurization and denitrification agent comprises 1-3 parts by weight of a mixture of combustion improver magnesium oxide and magnesium acetate; the catalyst is nano titanium dioxide, silicon oxide, iron oxide and/or copper oxide.
9. The method for preparing environment-friendly clean coal as claimed in claim 7, which is characterized in that: the adhesive is modified starch, polyvinyl alcohol, sodium polyacrylate and/or sodium carboxymethyl cellulose.
10. The method for preparing environment-friendly clean coal as claimed in claim 7, which is characterized in that: the particle size of the anthracite is smaller than 3mm, and the particle size of the bituminous coal is 5-15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202168.6A CN111548835A (en) | 2020-03-20 | 2020-03-20 | Environment-friendly clean coal and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010202168.6A CN111548835A (en) | 2020-03-20 | 2020-03-20 | Environment-friendly clean coal and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111548835A true CN111548835A (en) | 2020-08-18 |
Family
ID=71997648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010202168.6A Pending CN111548835A (en) | 2020-03-20 | 2020-03-20 | Environment-friendly clean coal and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111548835A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112175688A (en) * | 2020-10-22 | 2021-01-05 | 安徽海螺新材料科技有限公司 | Cement clinker calcination fire coal additive and preparation method thereof |
| CN115418257A (en) * | 2022-07-07 | 2022-12-02 | 中国科学院大学 | Carbon-based desulfurization and denitrification double-effect catalytic additive for decoupling combustion type coal, and preparation method and application method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112115A (en) * | 2015-09-23 | 2015-12-02 | 白山市亿通经贸有限公司 | Anthracite composite fuel, composite coal and preparation method for composite coal |
| CN109609241A (en) * | 2018-12-25 | 2019-04-12 | 北京首创博桑环境科技股份有限公司 | A kind of fire coal cleaning additive and preparation method thereof |
-
2020
- 2020-03-20 CN CN202010202168.6A patent/CN111548835A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105112115A (en) * | 2015-09-23 | 2015-12-02 | 白山市亿通经贸有限公司 | Anthracite composite fuel, composite coal and preparation method for composite coal |
| CN109609241A (en) * | 2018-12-25 | 2019-04-12 | 北京首创博桑环境科技股份有限公司 | A kind of fire coal cleaning additive and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 谌伦建等: "《工业型煤技术》", 30 September 2012, 煤炭工业出版社 * |
| 车得福: "《煤氮热变迁与氮氧化物生成》", 31 May 2013, 西安交通大学出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112175688A (en) * | 2020-10-22 | 2021-01-05 | 安徽海螺新材料科技有限公司 | Cement clinker calcination fire coal additive and preparation method thereof |
| CN115418257A (en) * | 2022-07-07 | 2022-12-02 | 中国科学院大学 | Carbon-based desulfurization and denitrification double-effect catalytic additive for decoupling combustion type coal, and preparation method and application method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102776051B (en) | Efficient and environment-friendly coal additive and preparation method thereof | |
| CN1236027C (en) | Process for preparing composite biomass briquettes | |
| CN102796583B (en) | Efficient clean briquette coal and preparation method thereof | |
| CN102517120A (en) | Fuel coal additive | |
| CN101269339B (en) | High-efficiency fuel coal catalyst | |
| CN104845697A (en) | Biomass briquettes prepared from municipal domestic waste and preparation method | |
| CN111548835A (en) | Environment-friendly clean coal and preparation method thereof | |
| CN101457165B (en) | Coal water slurry made by combining lincomycin wet bacteria slag and coal | |
| CN1064994C (en) | Sulfur-immobilizing coal-saving additive | |
| CN104560258B (en) | Cleaning briquette coal binder | |
| CN101089153A (en) | Industrial hot puffed briquette | |
| CN101285015A (en) | Quick burning coal compositions of environmental protection and energy conservation by using bituminous coal as component | |
| CN107987912A (en) | A kind of high-performance biomass solid fuel and preparation method thereof | |
| CN101165147A (en) | Liquid combustion adjuvant for coal | |
| CN104357124A (en) | Environment-friendly fire coal combustion improver | |
| CN103666632A (en) | Solid coal combustion improver and preparation method thereof | |
| CN105733725A (en) | Coal ash type fire enhancing brick | |
| CN100540638C (en) | A kind of coal saving and combustion supporting sulfur fixer and method for making | |
| CN101955833A (en) | Coal combustion catalyst | |
| CN104611082A (en) | Production method of environmental-friendly charcoal | |
| CN101434885A (en) | Multiple-effect coal fines additive and efficient clean fire coal powder prepared thereby | |
| CN109609241B (en) | Coal-fired cleaning additive and preparation method thereof | |
| CN100999690A (en) | Soft coal smoke eliminating agent | |
| CN1121951A (en) | Combustion adjuvant and fuel contg. it | |
| CN101705133A (en) | Efficient coal-fired combustion-supporting desulfurization additive and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200818 |
|
| RJ01 | Rejection of invention patent application after publication |