CN113105931A - High-efficiency energy-saving smoke-eliminating coal-saving agent and preparation method thereof - Google Patents
High-efficiency energy-saving smoke-eliminating coal-saving agent and preparation method thereof Download PDFInfo
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- CN113105931A CN113105931A CN202110425852.5A CN202110425852A CN113105931A CN 113105931 A CN113105931 A CN 113105931A CN 202110425852 A CN202110425852 A CN 202110425852A CN 113105931 A CN113105931 A CN 113105931A
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- polyvinyl alcohol
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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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Abstract
The invention provides a high-efficiency energy-saving smoke abatement coal saving agent and a preparation method thereof, belonging to the technical field of coal saving agents, the high-efficiency energy-saving smoke abatement coal saving agent comprises the following components in percentage by weight: 5-10% of potassium chlorate, 6-9% of potassium nitrate, 7-12% of polyvinyl alcohol-ferric hydroxide compound, 3-5% of calcium oxide, 3-5% of sodium carbonate, 3-7% of potassium chloride, 8-11% of alkyl glycoside, 1-2% of butanol and the balance of water; the preparation method of the polyvinyl alcohol-ferric hydroxide compound comprises the steps of mixing polyvinyl alcohol with water, adding alkali to adjust the pH value to 9-11, adding ferric chloride, stirring for 20-30min, carrying out solid-liquid separation, drying and crushing to obtain the polyvinyl alcohol-ferric hydroxide compound. The coal saving agent provided by the invention can solve the problems that the coal saving agent in the prior art has poor coal saving and smoke eliminating effects, the raw materials are not environment-friendly and the catalyst is not easy to attach to the surface of coal.
Description
Technical Field
The invention belongs to the technical field of coal-saving agents, and particularly relates to a high-efficiency energy-saving smoke-eliminating coal-saving agent and a preparation method thereof.
Background
The coal-saving agent is produced by chemical compounding technology, and the chemical components are composed of catalyst, modifier, combustion improver, smoke suppressor, sulfur-fixing agent and swelling agent. The coal saving agent has the characteristics of promoting the combustion utilization rate of coal and reducing the content of harmful gas and unburned carbon particles in flue gas, is widely used at present, and discloses an environment-friendly coal saving agent in the prior art document CN101486939B, which comprises 5-10% of a catalyst, 30-40% of a modifier, 5-10% of a smoke suppressor, 5-10% of a cleaning agent, 2-8% of a combustion improver, 30-35% of a swelling agent and 5-10% of a sulfur fixing agent in percentage by weight; the catalyst is chromium trioxide; the modifier is nickel; the smoke suppressor is potassium permanganate; the cleaning agent is cyclopentadiene; the combustion improver is ammonium persulfate; the swelling agent is sodium chloride, potassium chloride or a mixture of the sodium chloride and the potassium chloride; the sulfur-fixing agent is manganese. The adopted catalyst chromium trioxide has serious toxicity to the environment and is not suitable for long-term use, and the problem that the catalytic effect of the catalyst is weakened because the catalyst is difficult to attach to the surface of coal due to insolubility in water is not noticed in the design process.
Disclosure of Invention
Based on the above, aiming at the defects of the prior art, the invention aims to provide the high-efficiency energy-saving smoke-eliminating coal-saving agent and the preparation method thereof, so as to solve the problems that the coal-saving smoke-eliminating effect is poor, the raw materials are not environment-friendly and the catalyst is not easy to attach to the surface of coal in the prior art.
In order to solve the technical problems, the invention provides an efficient energy-saving smoke abatement coal saving agent, which comprises the following components in percentage by weight: 5-10% of potassium chlorate, 6-9% of potassium nitrate, 7-12% of polyvinyl alcohol-ferric hydroxide compound, 3-5% of calcium oxide, 3-5% of sodium carbonate, 3-7% of potassium chloride, 8-11% of alkyl glycoside, 1-2% of butanol and the balance of water;
the preparation method of the polyvinyl alcohol-ferric hydroxide compound comprises the steps of mixing polyvinyl alcohol with water, adding alkali to adjust the pH value to 9-11, adding ferric chloride, stirring for 20-30min, carrying out solid-liquid separation, drying and crushing to obtain the polyvinyl alcohol-ferric hydroxide compound.
Further, the polymerization degree of the polyvinyl alcohol is 1700-3500.
Further, the alcoholysis degree of the polyvinyl alcohol is 99-100%.
Further, the alkali is ammonia water.
Further, in the preparation of the polyvinyl alcohol-iron hydroxide composite, the mass ratio of the polyvinyl alcohol to the water is 1: (20-30).
Further, in the preparation of the polyvinyl alcohol-iron hydroxide composite, the mass ratio of the ferric chloride to the polyvinyl alcohol is (0.6-0.8): 1.
Further, the alkyl glycoside is C8-C10.
The invention also provides a method for preparing the high-efficiency energy-saving smoke abatement coal saving agent, which comprises the following steps:
1) preparation of polyvinyl alcohol-ferric hydroxide complex: mixing polyvinyl alcohol with water, adding ammonia water to adjust pH to 9-11, adding ferric chloride, stirring for 20-30min, performing solid-liquid separation, drying, and pulverizing to obtain polyvinyl alcohol-ferric hydroxide compound;
2) preparation of the coal saving agent: according to the formula amount, adding alkyl glycoside of C8-C10 into water, uniformly mixing, heating to 60-70 ℃, adding a polyvinyl alcohol-ferric hydroxide compound under stirring, adding potassium chlorate, potassium nitrate, calcium oxide, sodium carbonate and potassium chloride after stirring for 2-10min, cooling to 35-50 ℃, adding butanol, and uniformly mixing to obtain the product.
The coal saving agent provided by the invention is suitable for various coals such as brown coal, bituminous coal, anthracite and the like, can be used in furnaces such as circulating fluidized bed furnaces, chain furnaces, kilns, layered boilers and the like, can obviously improve the heat efficiency of coal combustion, and has a good coal saving effect. Tests prove that the coal saving agent finally prepared by the invention has the functions of high efficiency, energy saving and sulfur fixation, and can obviously reduce the content of black carbon particles in smoke discharge to whiten the black smoke.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The features and properties of the present invention are described in further detail below with reference to examples.
Example 1
An efficient energy-saving smoke-eliminating coal-saving agent comprises the following components in percentage by weight: 8% of potassium chlorate, 7.5% of potassium nitrate, 10% of polyvinyl alcohol-ferric hydroxide compound, 4% of calcium oxide, 4% of sodium carbonate, 5.5% of potassium chloride, 9.5% of alkyl glycoside, 1.5% of butanol and the balance of water.
The preparation method comprises the following steps:
1) preparation of polyvinyl alcohol-ferric hydroxide complex: mixing polyvinyl alcohol with the polymerization degree of 1700 and the alcoholysis degree of 99.5% and water according to the mass ratio of 1:25, adding ammonia water to adjust the pH to 10, adding ferric chloride with the mass of 70% of the polyvinyl alcohol, stirring for 25min, filtering, drying at 50 ℃ for 12 hours, and crushing to 100 meshes to obtain a polyvinyl alcohol-ferric hydroxide compound;
2) preparation of the coal saving agent: according to the formula, according to the formula amount, adding C8-C10 alkyl glycoside into water, uniformly mixing, heating to 65 ℃, adding a polyvinyl alcohol-ferric hydroxide compound under stirring at 200r/min, continuously stirring for 5min, adding potassium chlorate, potassium nitrate, calcium oxide, sodium carbonate and potassium chloride, stirring at 350r/min for 25min, cooling to 40 ℃, adding butanol, and uniformly mixing to obtain the finished product.
The prepared coal saving agent is added according to 3 percent of the mass of the lignite and is combusted in a circulating fluidized bed furnace, and through calculation, the heat efficiency is improved by 28.3 percent, the coal saving rate is 29.4, the discharged smoke is changed from black to white, and the coal saving and smoke abatement agent has obvious coal saving, environmental protection and smoke abatement effects.
Example 2
An efficient energy-saving smoke-eliminating coal-saving agent comprises the following components in percentage by weight: 5% of potassium chlorate, 9% of potassium nitrate, 11% of polyvinyl alcohol-ferric hydroxide compound, 3% of calcium oxide, 5% of sodium carbonate, 6% of potassium chloride, 11% of alkyl glycoside, 2% of butanol and the balance of water.
The preparation method comprises the following steps:
1) preparation of polyvinyl alcohol-ferric hydroxide complex: mixing polyvinyl alcohol with the polymerization degree of 2000 and the alcoholysis degree of 99.3% and water according to the mass ratio of 1:30, adding ammonia water to adjust the pH value to 10, adding ferric chloride with the mass of 60% of the polyvinyl alcohol, stirring for 25min, filtering, drying at 50 ℃ for 12 hours, and crushing to 100 meshes to obtain a polyvinyl alcohol-ferric hydroxide compound;
2) preparation of the coal saving agent: according to the formula, according to the formula amount, adding C8-C10 alkyl glycoside into water, uniformly mixing, heating to 65 ℃, adding a polyvinyl alcohol-ferric hydroxide compound under stirring at 200r/min, continuously stirring for 5min, adding potassium chlorate, potassium nitrate, calcium oxide, sodium carbonate and potassium chloride, stirring at 350r/min for 25min, cooling to 40 ℃, adding butanol, and uniformly mixing to obtain the finished product.
The prepared coal saving agent is added according to 3 percent of the mass of the lignite and is combusted in a circulating fluidized bed furnace, and through calculation, the heat efficiency is improved by 26.4 percent, the coal saving rate is 26.9, the discharged smoke is changed from black to white, and the coal saving and smoke abatement agent has obvious coal saving, environmental protection and smoke abatement effects.
Example 3
An efficient energy-saving smoke-eliminating coal-saving agent comprises the following components in percentage by weight: 10% of potassium chlorate, 6% of potassium nitrate, 7% of polyvinyl alcohol-ferric hydroxide compound, 5% of calcium oxide, 3% of sodium carbonate, 6% of potassium chloride, 8% of alkyl glycoside, 1% of butanol and the balance of water.
The preparation method comprises the following steps:
1) preparation of polyvinyl alcohol-ferric hydroxide complex: mixing polyvinyl alcohol with the polymerization degree of 2000 and the alcoholysis degree of 99.3% and water according to the mass ratio of 1:20, adding ammonia water to adjust the pH to 10, adding ferric chloride with the mass of 80% of the polyvinyl alcohol, stirring for 30min, filtering, drying at 50 ℃ for 12 hours, and crushing to 100 meshes to obtain a polyvinyl alcohol-ferric hydroxide compound;
2) preparation of the coal saving agent: according to the formula, according to the formula amount, adding C8-C10 alkyl glycoside into water, uniformly mixing, heating to 70 ℃, adding a polyvinyl alcohol-ferric hydroxide compound under stirring at 200r/min, continuously stirring for 5min, adding potassium chlorate, potassium nitrate, calcium oxide, sodium carbonate and potassium chloride, stirring at 350r/min for 25min, cooling to 40 ℃, adding butanol, and uniformly mixing to obtain the finished product.
The prepared coal saving agent is added according to 3 percent of the mass of the lignite and is combusted in a circulating fluidized bed furnace, through calculation, the heat efficiency is improved by 26.8 percent, the coal saving rate is 27.5 percent, the smoke discharge is changed from black to white, and the coal saving and smoke abatement agent has obvious coal saving, environmental protection and smoke abatement effects.
Comparative example 1
A coal saving agent comprises the following components in percentage by weight: 8% of potassium chlorate, 7.5% of potassium nitrate, 4.2% of ferric hydroxide, 5.8% of polyvinyl alcohol (the degree of polymerization is 1700, and the degree of alcoholysis is 99.5%), 4% of calcium oxide, 4% of sodium carbonate, 5.5% of potassium chloride, 9.5% of alkyl glycoside, and the balance of water.
The preparation method comprises the following steps: according to the formula, according to the formula amount, adding polyvinyl alcohol into water, heating to dissolve, adding alkyl glycoside of C8-C10, uniformly mixing, adding ferric hydroxide under stirring at 200r/min, continuing stirring for 5min, adding potassium chlorate, potassium nitrate, calcium oxide, sodium carbonate and potassium chloride, stirring at 350r/min for 25min, and cooling to room temperature to obtain the product.
The prepared coal saving agent is added according to 3 percent of the mass of the lignite and is combusted in a circulating fluidized bed furnace, and through calculation, the heat efficiency is improved by 19.1 percent, and the coal saving rate is 19.8 percent.
The coal saving agent provided by the invention is suitable for various coals such as brown coal, bituminous coal, anthracite and the like, can be used in furnaces such as circulating fluidized bed furnaces, chain furnaces, kilns, layered boilers and the like, in the invention, iron hydroxide is compounded by polyvinyl alcohol and crushed into 80-120 meshes, on one hand, polyvinyl alcohol gel has very good affinity with coal, can be uniformly attached to the surface of the coal by spraying, the polyvinyl alcohol gel is taken as combustible matter, has obvious micro-explosion effect during combustion, can enable coal aggregates to be crushed to form a larger combustion area, has stirring effect on airflow in the furnace, promotes the combustion of free carbon granules without combustion, reduces the content of black carbon in smoke, on the other hand, the iron hydroxide is used as a catalyst, can catalyze the harmless conversion of carbon monoxide and sulfur dioxide, and after the iron hydroxide is compounded by the polyvinyl alcohol, the adsorption effect of ferric hydroxide and coal can be enhanced, potassium chlorate and potassium nitrate are added into the coal saving agent to have oxygenation effects at different temperature sections, calcium oxide and sodium carbonate can synergistically exert a sulfur fixation effect, potassium chloride has a smoke abatement function, and butanol and alkyl glycoside of C8-C10 are added to ensure that the polyvinyl alcohol-ferric hydroxide compound and each component can keep good mixing uniformity in water, so that the coal saving agent can be mixed with coal in a spraying mode without causing nozzle blockage. Tests prove that the coal saving agent finally prepared by the invention has the functions of high efficiency, energy saving and sulfur fixation, and can obviously reduce the content of black carbon particles in smoke discharge to whiten the black smoke.
Finally, it is also noted that the above-mentioned lists merely illustrate a few specific embodiments of the invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (9)
1. The high-efficiency energy-saving smoke-eliminating coal-saving agent is characterized by comprising the following components in percentage by weight: 5-10% of potassium chlorate, 6-9% of potassium nitrate, 7-12% of polyvinyl alcohol-ferric hydroxide compound, 3-5% of calcium oxide, 3-5% of sodium carbonate, 3-7% of potassium chloride, 8-11% of alkyl glycoside, 1-2% of butanol and the balance of water;
the preparation method of the polyvinyl alcohol-ferric hydroxide compound comprises the steps of mixing polyvinyl alcohol with water, adding alkali to adjust the pH value to 9-11, adding ferric chloride, stirring for 20-30min, carrying out solid-liquid separation, drying and crushing to obtain the polyvinyl alcohol-ferric hydroxide compound.
2. The efficient energy-saving smoke abatement and coal saving agent as claimed in claim 1, wherein the degree of polymerization of the polyvinyl alcohol is 1700-3500.
3. The efficient energy-saving smoke-eliminating coal-saving agent according to claim 1 or 2, wherein the particle size of the pulverized coal is 80-120 meshes.
4. The high-efficiency energy-saving smoke-eliminating coal-saving agent according to claim 1 or 2, wherein the alcoholysis degree of the polyvinyl alcohol is 99-100%.
5. The efficient energy-saving smoke abatement coal saving agent as claimed in claim 1, wherein the alkali is ammonia water.
6. The energy-efficient smoke-eliminating and coal-saving agent according to claim 1 or 3, wherein in the step 1), in the preparation of the polyvinyl alcohol-ferric hydroxide compound, the mass ratio of the polyvinyl alcohol to the water is 1: (20-30).
7. The efficient energy-saving smoke-eliminating coal-saving agent according to claim 5, wherein the mass ratio of the ferric chloride to the polyvinyl alcohol in the preparation of the polyvinyl alcohol-ferric hydroxide compound is (0.6-0.8): 1.
8. The efficient energy-saving smoke-eliminating coal-saving agent as claimed in claim 1, wherein the alkyl glycoside is C8-C10.
9. A method for preparing the high-efficiency energy-saving smoke abatement coal saving agent of any one of claims 1 to 8, which is characterized by comprising the following steps:
1) preparation of polyvinyl alcohol-ferric hydroxide complex: mixing polyvinyl alcohol with water, adding ammonia water to adjust pH to 9-11, adding ferric chloride, stirring for 20-30min, performing solid-liquid separation, drying, and pulverizing to obtain polyvinyl alcohol-ferric hydroxide compound;
2) preparation of the coal saving agent: according to the formula amount, adding alkyl glycoside of C8-C10 into water, uniformly mixing, heating to 60-70 ℃, adding a polyvinyl alcohol-ferric hydroxide compound under stirring, adding potassium chlorate, potassium nitrate, calcium oxide, sodium carbonate and potassium chloride after stirring for 2-10min, cooling to 35-50 ℃, adding butanol, and uniformly mixing to obtain the product.
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| CN202110425852.5A CN113105931A (en) | 2021-04-20 | 2021-04-20 | High-efficiency energy-saving smoke-eliminating coal-saving agent and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114479981A (en) * | 2022-03-15 | 2022-05-13 | 福建朝旭新能源科技有限公司 | Low-mixing-amount efficient coal-saving agent and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114479981A (en) * | 2022-03-15 | 2022-05-13 | 福建朝旭新能源科技有限公司 | Low-mixing-amount efficient coal-saving agent and preparation method thereof |
| CN114479981B (en) * | 2022-03-15 | 2023-08-29 | 福建朝旭新能源科技有限公司 | Low-dosage high-efficiency coal-saving agent and preparation method thereof |
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