CN111253990A - High-efficiency coking removal method - Google Patents
High-efficiency coking removal method Download PDFInfo
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- CN111253990A CN111253990A CN201811451459.8A CN201811451459A CN111253990A CN 111253990 A CN111253990 A CN 111253990A CN 201811451459 A CN201811451459 A CN 201811451459A CN 111253990 A CN111253990 A CN 111253990A
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- blending
- jin
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Classifications
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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
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
-
- 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
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/04—Use of additives to fuels or fires for particular purposes for minimising corrosion or incrustation
-
- 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
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A method for efficiently removing coking relates to the technical field of chemistry, in particular to a method for efficiently removing coking. The method comprises the following steps: firstly, weighing one kilogram of biomass particle raw material; secondly, weighing three jin of decoking agent; taking out thirty jin of weighed biomass particle raw materials, and uniformly blending the weighed biomass particle raw materials with three jin of decoking agents to obtain a blending material; and fourthly, carrying out secondary blending on the obtained blending material and the rest seventy jin of biomass particle raw materials, uniformly blending, and adding a proper amount of clear water in the blending process. After the technical scheme is adopted, the invention has the beneficial effects that: the mixing method adopts a mode of mixing large piles and small piles, so that the decoking agent can be saved, the decoking agent and biomass particles can be mixed more uniformly, the mixing effect is better, and the biomass particles are less coked during combustion.
Description
Technical Field
The invention relates to the technical field of chemistry, in particular to a method for efficiently removing coking.
Background
The biomass fuel is a blocky environment-friendly new energy source produced by processing straws, rice hulls, peanut shells, corncobs, oil tea shells, cottonseed hulls and the like and three residues. The diameter of the biomass particles is generally 6-10 mm. The biomass particles start to support combustion when the combustion temperature of the hearth reaches 800 ℃, and a large amount of slag formed after the particles are combusted can be removed after the decoking agent is added according to the principle of micro-explosion expansion 15 times of powder separation. The fuel (without natural gas and electricity) has three combustion stages in the combustion process, namely an initial combustion stage of 1-600 ℃, a combustion peak stage of 600-1200 ℃, and an ash stage (the white heat can reach about 1350 ℃). In the process of combustion peak albefaction, both fossil (coal) and biomass particles (wood, straw and other plant wastes) can generate residues and carbon oxides (carbon residues), slagging is a normal reaction in the combustion process, the dust and too many carbon oxides can lead the furnace slag to seal the fire grate in the albefaction process, so that the fire is downward, then the phenomenon of fusing the fire grate and the furnace slag is called coking, and the fire grate and the furnace bars are easily damaged after the formation. The decoking agent can separate slag and carbon oxide after micro-explosion and expansion of 15 times in the process of blanching, avoids a bonding path, and enables air supply to be transparent up and down, thereby achieving the aim of decoking. The existing method for removing coke only can add a decoking agent, but no method for adding the decoking agent exists.
Disclosure of Invention
The invention aims to provide a method for efficiently removing coking aiming at the defects and shortcomings of the prior art, and the blending method adopts a large-pile and small-pile blending mode, so that on one hand, a decoking agent can be saved, on the other hand, the decoking agent and biomass particles can be blended more uniformly, the blending effect is better, and the coking of the biomass particles is less during combustion.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for removing coking efficiently, which comprises the following steps:
firstly, weighing one kilogram of biomass particle raw material;
secondly, weighing three jin of decoking agent;
taking out thirty jin of weighed biomass particle raw materials, and uniformly blending the weighed biomass particle raw materials with three jin of decoking agents to obtain a blending material;
and fourthly, carrying out secondary blending on the obtained blending material and the rest seventy jin of biomass particle raw materials, uniformly blending, and adding a proper amount of clear water in the blending process.
In the second step, the decoking agent consists of nitrate, aluminum powder, borax, carbon powder, purified water, a dispersing agent, a catalyst and copper nitrate.
In the third step, a small amount of clear water is required to be added in the blending process.
In the fourth step, the temperature of the clear water added in the blending process is between 25 and 35 ℃.
The weight of the biomass particle feedstock can vary as desired.
After the technical scheme is adopted, the invention has the beneficial effects that: the mixing method adopts a mode of mixing large piles and small piles, so that the decoking agent can be saved, the decoking agent and biomass particles can be mixed more uniformly, the mixing effect is better, and the biomass particles are less coked during combustion.
Detailed Description
Example 1
The technical scheme adopted by the specific implementation mode is as follows: a method for removing coking efficiently, which comprises the following steps:
firstly, weighing one kilogram of biomass particle raw material;
secondly, weighing three jin of decoking agent;
taking out thirty jin of weighed biomass particle raw materials, and uniformly blending the weighed biomass particle raw materials with three jin of decoking agents to obtain a blending material;
and fourthly, carrying out secondary blending on the obtained blending material and the rest seventy jin of biomass particle raw materials, uniformly blending, and adding a proper amount of clear water in the blending process. The biomass particle raw material comprises straw, rice straw, vegetable oil, fruit peel, plant ash, rice hull, activated carbon, animal bone, purified water and a sulfur-fixing agent, and the preparation steps are as follows: firstly, cleaning straws and rice straws, then drying in the sun, crushing after drying in the sun, wherein the crushing degree is below 0.2mm, and then storing; primarily cleaning the fruit skin, drying in the sun, crushing, and storing; then grinding the rice hulls into powder, drying the powder in the sun, mixing the powder with plant ash in a ratio of 3: 1, and naturally drying the powder in the sun; drying animal bones in the sun and crushing into powder; finally, weighing sufficient active carbon and pure water to mix at the temperature of 35-45 ℃, wherein the proportion of the active carbon to the pure water is 1: 4, the mixing time is 0.5H, continuous stirring is required during mixing, vegetable oil is added simultaneously during stirring at the proportion of 6: 1, the stirring time is 1H-2H after mixing, and the stirring speed is 300 r/mim;
in the second step, the decoking agent consists of nitrate, aluminum powder, borax, carbon powder, purified water, a dispersing agent, a catalyst and copper nitrate. The preparation method of the decoking agent comprises the following steps:
A. preparation of the dispersing agent:
firstly, reacting stearic acid with ammonia to generate ammonium salt, and then drying and dehydrating the ammonium salt;
secondly, pouring ammonium salt and higher fatty alcohol into a container for stirring, adding purified water during stirring, wherein the stirring speed is 80r/mim, the stirring time is 0.1H-0.2H, and obtaining a dispersing agent after stirring;
B. mixing:
firstly, weighing nitrate, borax and copper nitrate according to a proportion, pouring the mixture into a container for first stirring, wherein the stirring speed is 30r/mim, the stirring time is 0.05H-0.1H, adding a dispersing agent after the first stirring is finished, and stirring for a second stirring, wherein the stirring speed is 60r/mim, and the stirring time is 0.3H-0.4H, so as to finish the second stirring;
secondly, mixing aluminum powder, borax and carbon powder in proportion, then stirring, slowly adding purified water in the stirring process, wherein the stirring speed is 120r/mim, the stirring time is 0.4H-0.6H, after stirring is finished, adding a catalyst, stirring again, and then standing for 0.5H;
and thirdly, mixing the mixture obtained after stirring again, stirring, adding purified water and a catalyst during stirring, stirring at the speed of 180r/mim for 0.5H-1H, and standing for 0.5H after stirring to obtain the decoking agent.
Nitric acid HNO3 and a metal. Consisting of metal ions (ammonium ions) and nitrate ions. Common examples include sodium nitrate, potassium nitrate, ammonium nitrate, calcium nitrate, lead nitrate, cerium nitrate, etc.
Aluminum powder, commonly known as silver powder, is a silver-colored metallic pigment, and is prepared by adding a small amount of lubricant into pure aluminum foil, crushing the mixture into scaly powder by ramming, and polishing the scaly powder. The aluminum powder has light weight, high floating force, strong covering power and good light and heat reflecting performance. After treatment, the aluminum powder can also be made into non-floating aluminum powder. The aluminum powder can be used for identifying fingerprints and can also be used as fireworks. Aluminum powder is a large class of metal pigments due to its wide use, large demand, and many varieties.
The charcoal powder is prepared from crop straws and forestry residues, and is applied to various fields such as industry, agriculture, medicine, families and the like. The charcoal powder can be used for metallurgy, pharmacy, soil improvement, and can be used for adsorbing formaldehyde, removing harmful gas, and removing dampness and odor in household.
In the third step, a small amount of clear water is required to be added in the blending process.
In the fourth step, the temperature of the clear water added in the blending process is between 25 and 35 ℃.
Example 2
A method for removing coking efficiently, which comprises the following steps:
firstly, weighing a flemingia philippinensis biomass particle raw material;
secondly, weighing thirty jin of decoking agent;
taking out three hundred jin of weighed biomass particle raw material, and uniformly blending the weighed biomass particle raw material with thirty jin of decoking agent to obtain a blend;
and fourthly, carrying out secondary blending on the obtained blending material and the rest seven hundred jin of biomass particle raw materials, uniformly blending, and adding a proper amount of clear water in the blending process.
In the second step, the decoking agent consists of nitrate, aluminum powder, borax, carbon powder, purified water, a dispersing agent, a catalyst and copper nitrate. 200 parts of nitrate, 50 parts of aluminum powder, 100 parts of borax, 50 parts of carbon powder, 80 parts of purified water, 15 parts of dispersing agent, 20 parts of catalyst and 40 parts of copper nitrate; the preparation method of the decoking agent comprises the following steps:
A. preparation of the dispersing agent:
firstly, reacting stearic acid with ammonia to generate ammonium salt, and then drying and dehydrating the ammonium salt;
secondly, pouring ammonium salt and higher fatty alcohol into a container for stirring, adding purified water during stirring, wherein the stirring speed is 80r/mim, the stirring time is 0.1H-0.2H, and obtaining a dispersing agent after stirring;
B. mixing:
firstly, weighing nitrate, borax and copper nitrate according to a proportion, pouring the mixture into a container for first stirring, wherein the stirring speed is 30r/mim, the stirring time is 0.05H-0.1H, adding a dispersing agent after the first stirring is finished, and stirring for a second stirring, wherein the stirring speed is 60r/mim, and the stirring time is 0.3H-0.4H, so as to finish the second stirring;
secondly, mixing aluminum powder, borax and carbon powder in proportion, then stirring, slowly adding purified water in the stirring process, wherein the stirring speed is 120r/mim, the stirring time is 0.4H-0.6H, after stirring is finished, adding a catalyst, stirring again, and then standing for 0.5H;
and thirdly, mixing the mixture obtained after stirring again, stirring, adding purified water and a catalyst during stirring, stirring at the speed of 180r/mim for 0.5H-1H, and standing for 0.5H after stirring to obtain the decoking agent.
Purified water refers to H free of impurities2O, purified water or pure water for short, is pure, clean, free of impurities or bacteria, such as organic contaminants, inorganic salts, any additives and various impurities, and is water that meets sanitary standards for drinking water. Is prepared by an electrodialyzer method, an ion exchanger method, a reverse osmosis method, a distillation method and other appropriate processing methods, is sealed in a container, does not contain any additive, is colorless and transparent, and can be directly drunk.
The dispersant is a surfactant which has two opposite properties of lipophilicity and hydrophilcity in a molecule. The amphiphilic agent is capable of uniformly dispersing solid and liquid particles of inorganic and organic pigments which are difficult to dissolve in liquids, and also preventing settling and agglomeration of the particles to form stable suspensions.
A substance that can change (increase or decrease) the chemical reaction rate of a reactant in a chemical reaction without changing the chemical equilibrium and whose own mass and chemical properties are not changed before and after the chemical reaction is called a catalyst. According to statistics, about more than 90% of industrial processes use catalysts, such as chemical industry, petrochemical industry, biochemical industry, environmental protection and the like. The catalysts are various in types and can be divided into liquid catalysts and solid catalysts according to states; the method is divided into a homogeneous catalyst and a heterogeneous catalyst according to the phase state of a reaction system, wherein the homogeneous catalyst comprises acid, alkali, soluble transition metal compounds and peroxide catalysts. Catalysts are of great importance in the modern chemical industry, for example, iron catalysts for ammonia synthesis, vanadium catalysts for sulfuric acid production, ethylene polymerization and the production of rubber from butadiene, all using different catalysts.
After the technical scheme is adopted, the invention has the beneficial effects that: the mixing method adopts a mode of mixing large piles and small piles, so that the decoking agent can be saved, the decoking agent and biomass particles can be mixed more uniformly, the mixing effect is better, and the biomass particles are less coked during combustion.
The above description is only for the purpose of illustrating the technical solutions of the present invention and not for the purpose of limiting the same, and other modifications or equivalent substitutions made by those skilled in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. A method for efficiently removing coking is characterized in that: the method comprises the following steps:
firstly, weighing one kilogram of biomass particle raw material;
secondly, weighing three jin of decoking agent;
taking out thirty jin of weighed biomass particle raw materials, and uniformly blending the weighed biomass particle raw materials with three jin of decoking agents to obtain a blending material;
and fourthly, carrying out secondary blending on the obtained blending material and the rest seventy jin of biomass particle raw materials, uniformly blending, and adding a proper amount of clear water in the blending process.
2. The method for removing coke efficiently as claimed in claim 1, wherein: in the second step, the decoking agent consists of nitrate, aluminum powder, borax, carbon powder, purified water, a dispersing agent, a catalyst and copper nitrate.
3. The method for removing coke efficiently as claimed in claim 1, wherein: in the third step, a small amount of clear water is required to be added in the blending process.
4. The method for removing coke efficiently as claimed in claim 1, wherein: in the third step, the ratio of the decoking agent to the clear water is 4: 1.
5. The method for removing coke efficiently as claimed in claim 1, wherein: in the fourth step, the temperature of the clear water added in the blending process is between 25 and 35 ℃.
6. The method for removing coke efficiently as claimed in claim 1, wherein: in the fourth step, stirring is carried out in the blending process, and clear water is added while stirring, wherein the stirring speed is 120 r/mim.
7. The method for removing coke efficiently as claimed in claim 1, wherein: the weight of the biomass particle feedstock can vary as desired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811451459.8A CN111253990A (en) | 2018-11-30 | 2018-11-30 | High-efficiency coking removal method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811451459.8A CN111253990A (en) | 2018-11-30 | 2018-11-30 | High-efficiency coking removal method |
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| CN111253990A true CN111253990A (en) | 2020-06-09 |
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| CN201811451459.8A Pending CN111253990A (en) | 2018-11-30 | 2018-11-30 | High-efficiency coking removal method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58164696A (en) * | 1982-03-24 | 1983-09-29 | Kubo Makoto | Preparation of high-quality coal from low-grade coal and debris |
| CN105637071A (en) * | 2014-09-25 | 2016-06-01 | 高钟成 | Pellet preparation system and preparation method using biomass |
| CN106065346A (en) * | 2016-05-26 | 2016-11-02 | 台山市合利生物质科技有限公司 | A kind of decoking cleaning boiler wall biological granular fuel and preparation method thereof |
-
2018
- 2018-11-30 CN CN201811451459.8A patent/CN111253990A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58164696A (en) * | 1982-03-24 | 1983-09-29 | Kubo Makoto | Preparation of high-quality coal from low-grade coal and debris |
| CN105637071A (en) * | 2014-09-25 | 2016-06-01 | 高钟成 | Pellet preparation system and preparation method using biomass |
| CN106065346A (en) * | 2016-05-26 | 2016-11-02 | 台山市合利生物质科技有限公司 | A kind of decoking cleaning boiler wall biological granular fuel and preparation method thereof |
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