CN1281725C - Environmental protection energy-saving coal additives - Google Patents
Environmental protection energy-saving coal additives Download PDFInfo
- Publication number
- CN1281725C CN1281725C CN 200510013262 CN200510013262A CN1281725C CN 1281725 C CN1281725 C CN 1281725C CN 200510013262 CN200510013262 CN 200510013262 CN 200510013262 A CN200510013262 A CN 200510013262A CN 1281725 C CN1281725 C CN 1281725C
- Authority
- CN
- China
- Prior art keywords
- coal
- saving
- environment
- energy
- additive
- 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.)
- Expired - Fee Related
Links
Abstract
The present invention discloses an environmental protection energy-saving coal additive which is composed of the components of the following proportion by weight: 30% to 82.5% of chromium slag, 5% to 30% of calcium oxide, 2% to 15% of magnesium oxide, 1% to 4% of silicon dioxide, 5% to 20% of sodium chloride, 1% to 5% of pyrolusite refined powder, 0.5% to 6% of potassium permanganate and 3% to 12% of flammable material. The present invention has the advantages of good energy saving performance and good environmental protection performance; when the environmental protection energy-saving coal additive is used for eliminating the hazards of the chromium slag for the environment, the coal consumption of coal for plain boilers, kilns, etc. can be reduced, the discharge of SO2 and smoke dust is reduced, the boiler coke formation is prevented and cured, the chromium slag as industrial harmful waste can be fully used, and the cost of coal additives is greatly reduced.
Description
Technical Field
The invention relates to a fire coal additive, in particular to a fire coal additive which utilizes industrial waste residues to reduce environmental pollution.
Background
In the process of producing chromic anhydride and dichromate by using chromic acid ore, a large amount of waste slag is generated, and the waste slag is often called chromium slag. It was determined that a considerable amount of hexavalent chromium compounds (water-soluble Cr) were still contained in the chromium slag6+0.28% -1.34%; acid soluble Cr6+0.90% -1.49%). The existence of hexavalent chromium has great toxic action on human, livestock and surrounding environment, and serious environmental pollution is inevitably caused if the hexavalent chromium is not treated. For many years, various researches have been made by domestic and foreign science and technology workers, but various treatment schemes are not accepted by manufacturers due to high cost or secondary pollution, and the accumulated chromium slag as mountain becomes social public hazard due to the pollution of water and soil and the pollution of chromium slag dust to air. Thus, manufacturers using chromic acid ores as raw materials are not more than ten families in China.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the environment-friendly and energy-saving coal additive which is beneficial to environment protection, can save energy and utilizes wastes.
The technical scheme of the invention is summarized as follows:
an environment-friendly energy-saving fire coal additive comprises the following components in percentage by weight:
30 to 82.5 percent of chromium slag and 5 to 30 percent of calcium oxide
2 to 15 percent of magnesium oxide and 1 to 4 percent of silicon dioxide
Sodium chloride 5-20 wt% and pyrolusite fine powder 1-5 wt%
0.5 to 6 percent of potassium permanganate and 3 to 12 percent of combustible substance
The content of the chromium slag is preferably 70-82 wt%, and most preferably 82 wt%.
The combustible substance is petroleum resin or rosin.
The environment-friendly and energy-saving coal additive has excellent energy-saving and environment-friendly properties, is widely known as a country with large energy consumption, saves coal consumption, and improves SO (SO) caused by coal-fired flue gas emission2、CO2And the pollution of smoke dust and the like to the atmosphere, has become the established national policy of the government of China. The invention can reduce the coal consumption of coal burning of common boilers, industrial kilns and the like and reduce SO while eliminating the harm of chromium slag to the environment2The method has the advantages of reducing the emission of smoke dust, preventing and controlling the coking of the boiler, and greatly reducing the cost of the coal-fired additive due to the utilization of the industrial hazardous waste chromium slag which needs to be subjected to cost-consuming treatment. Therefore, the invention has obvious social benefit and economic benefit.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
An environment-friendly energy-saving fire coal additive comprises the following components in percentage by weight:
chromium slag 82%, calcium oxide 5.5%, magnesium oxide 2%, silicon dioxide 1%, sodium chloride 5%, pyrolusite fine powder 1%, potassium permanganate 0.5% and petroleum resin 3%.
The components are mixed according to a conventional method to prepare the environment-friendly energy-saving coal additive.
Example 2
An environment-friendly energy-saving fire coal additive comprises the following components in percentage by weight:
chromium slag 82.5%, calcium oxide 5%, magnesium oxide 2%, silicon dioxide 1%, sodium chloride 5%, pyrolusite fine powder 1%, potassium permanganate 0.5% and petroleum resin 3%.
The components are mixed according to a conventional method to prepare the environment-friendly energy-saving coal additive.
Example 3
An environment-friendly energy-saving fire coal additive comprises the following components in percentage by weight:
chromium slag 70%, calcium oxide 5%, magnesium oxide 9%, silicon dioxide 2%, sodium chloride 5%, pyrolusite fine powder 5%, potassium permanganate 1%, rosin 3%.
The components are mixed according to a conventional method to prepare the environment-friendly energy-saving coal additive.
Example 4
An environment-friendly energy-saving fire coal additive comprises the following components in percentage by weight:
30% of chromium slag, 30% of calcium oxide, 8% of magnesium oxide, 4% of silicon dioxide, 5% of sodium chloride, 5% of pyrolusite fine powder, 5% of potassium permanganate and 12% of rosin.
The components are mixed according to a conventional method to prepare the environment-friendly energy-saving coal additive.
Example 5
An environment-friendly energy-saving fire coal additive comprises the following components in percentage by weight:
30% of chromium slag, 8% of calcium oxide, 15% of magnesium oxide, 4% of silicon dioxide, 20% of sodium chloride, 5% of pyrolusite fine powder, 6% of potassium permanganate and 12% of rosin.
The components are mixed according to a conventional method to prepare the environment-friendly energy-saving coal additive.
Experimental example 1
(1) Determination of residual hexavalent chromium in ash and slag
The environment-friendly and energy-saving coal additive of example 1 is prepared from the following components in percentage by weight: the weight ratio of the coal added is 1: 100, and the determination result of the residual hexavalent chromium in the slag removed from the coal powder furnace continuously heated in a mill of the spring iron and steel company and the fly-out flue dust is as follows:
slag: cr (chromium) component6+＜0.015mg/L
Flue dust Cr6+＜0.015mg/L
Test results on Tianjin Silent sea thermal power plant furnace No. 2
Cr in slag6+：0.092mg/L、0.011mg/L、0.011mg/L、0.065mg/L
Flue dust Cr6+：0.86mg/L、0.056mg/L、0.058mg/L、0.071mg/L
The national regulation emission standard: the identification standard value of hexavalent chromium leaching toxicity is specified in the identification standard of hazardous wastes GB 5083.3-1996: 1.50mg/L
The above data show that Cr in ash is present in coal after the environmental protection and energy saving coal additive of the invention is used in coal6+All below the allowable emission levels of the national standards. Therefore, the method is completely feasible to achieve one-time complete treatment of chromium slag pollution by reducing hexavalent chromium into trivalent chromium oxide at high temperature.
(2) Determination of coal saving Rate
The environment-friendly and energy-saving coal additive of example 1 is prepared from the following components in percentage by weight: the coal was added in a weight ratio of 1: 100.
Test results of the continuous heating furnace of the Jiuquan iron and Steel company, Rolling Mill:
thermal efficiency: 31.05 percent of the environment-friendly and energy-saving fire coal additive is added
33.55 percent of the environment-friendly and energy-saving fire coal additive is added
Coal-saving rate β -8.05% coal powder stove
Furnace No. 1 test results of tianjin resin factory:
coal saving rate: 12.0% note: chain furnace
Test results of boiler No. 1 of chemical plant of Tianjin institute of technology
Coal saving rate: 12.7% note: chain furnace
The above data show that: for general boiler and industrial furnace, it can save coal by about 10%. For coal-fired furnaces with higher thermal efficiency, such as utility boilers, the coal-saving rate is correspondingly lower, but the coal-saving effect can also be satisfactory.
(3) SO in flue gas2The test results of (1):
the environment-friendly and energy-saving coal additive of example 1 is prepared from the following components in percentage by weight: the coal was added in a weight ratio of 1: 100.
Test results of the continuous heating furnace of the Jiuquan iron and Steel company, Rolling Mill:
SO2emission (Standard air volume)
5.4Kg/h before adding the environment-friendly and energy-saving coal additive
4.0Kg/h after the environmental protection and energy saving coal additive of the invention is added
The sulfur removal efficiency is as follows: 25.9 percent
Note: the furnace temperature of the pulverized coal furnace of the first rolling mill of the Jiuquan iron and Steel company is 1100-1200 ℃.
Furnace No. 1 of chemical plant of Tianjin institute of technology and technology
SO2Emission concentration (mg/Nm)3)
369A is added with the environment-friendly and energy-saving coal additive
258 after the environment-friendly and energy-saving coal additive is added (the adding ratio is 1: 100)
The sulfur removal efficiency is as follows: 30 percent of
The above data indicate that SO is present in conventional boilers and industrial furnaces with furnace temperatures not exceeding 1200 deg.C2The emission can be reduced by about 25 percent. The sulfur fixing effect of the environment-friendly and energy-saving coal additive is reduced when the environment-friendly and energy-saving coal additive is used in a high-temperature boiler with the temperature of over 1200 ℃. The sulfur removal efficiency is reduced, which is characteristic of dry sulfur fixation.
(4) Determination of soot emissions in flue gases
The environment-friendly and energy-saving coal additive of example 1 is prepared from the following components in percentage by weight: the coal was added in a weight ratio of 1: 100.
Test results of the continuous heating furnace of the Jiuquan iron and Steel company, Rolling Mill:
smoke and dust emission (Standard air quantity)
36.4Kg/h before adding the environment-friendly and energy-saving coal additive
After the environment-friendly and energy-saving fire coal additive is added, 33.8Kg/h
Dust removal efficiency: 7.1 percent
Test results of Tianjin Silent sea thermal power plant No. 2 furnace
2000 Kg/h before adding the environment-friendly energy-saving coal additive
1700 Kg/h of the environment-friendly and energy-saving fire coal additive of the invention is added
Dust removal efficiency: 15 percent of
The data show that the environment-friendly and energy-saving coal additive has obvious effect on reducing the smoke and dust emission of the boiler.
Relevant experiments also prove that the coking phenomenon is obviously improved after the environment-friendly and energy-saving coal additive is used.
When the environment-friendly energy-saving fire coal additive which takesthe chromium slag as the main raw material is used, hexavalent chromium is reduced into trivalent chromium oxide (Cr) which is nontoxic and insoluble in water at high temperature of a hearth2O3) Thereby achieving the purpose of treating the chromium slag pollution at one time.
The theoretical basis of the invention.
1. Harmlessness of hexavalent chromium
Hexavalent chromium compounds are strong oxidizers that promote complete combustion of coal under conditions of coal combustion. During combustion, coal is the reducing agent, which is oxidized to carbon dioxide, and hexavalent chromium is reduced to trivalent chromium oxide, represented by the formula
The reaction formula (1) is an auto-oxidation-reduction decomposition reaction in which a part of hexavalent chromium is reduced to Cr2O3. Wherein Me is a coal-fired additive (which can be heavy oil or resin).
Equation (2) shows that the oxygen generated by equation (1) is more reactive than oxygen in air due to the presence of atomic oxygen during formation, and it reacts more readily with carbon to form carbon dioxide.
The equation (3) shows that at higher temperatures chromate is directly reduced to Cr2O3。
The end result of the reaction is the formation of Cr2O3And CO2。
Coal with a small amount of additive is in excess compared to hexavalent chromium compounds, which are strong oxidizers, thus allowing more complete combustion of the coal. While the hexavalent chromium compound is reduced to Cr2O3。Cr2O3Is insoluble in water, non-toxic and stable in the atmosphere, thereby achieving the purpose of treating the chromium slag pollution.
2. Coal saving
The combustion of coal is virtually stepwise. Firstly, volatile matters are volatilized, the ignition point is lower, and the combustion speed is high; the second is the burning of carbon, which burns at a slower rate.
The additive can promote the volatilization of volatile matters and release heat after combustion; the oxidant and the catalyst can effectively accelerate the combustion speed of carbon, the comprehensive effect is to obviously advance the pre-combustion section of combustion, the combustion speed is obviously accelerated, the fuel is fully combusted in the hearth to release heat, and the temperature in the hearth is greatly improved, so that the heat efficiency of the coal-fired furnace is improved, the residual carbon content in ash slag is reduced, the utilization rate of the coal is improved, and the purpose of saving coal is achieved.
3. Reduction of SO2Is discharged from
More or less sulfur compounds are present in the coal, mainly in the form of inorganic or organic sulfur, which is oxidized to form SO during the combustion of the coal2Reducing SO in the flue gas discharged from coal-fired furnace2Is another important aspect of the present invention. The method we used is dry desulphurization. At high temperature in furnace, using oxide of iron and chromium as catalyst, SO2Is oxidized into SO3SO formed3Mixing with sulfur-fixing agent in additive to form sulfate which is difficult to decompose and deposit in furnaceAsh and slag, so as to achieve the purpose of fixing sulfur.
4. Others
The coal additive of the invention is added with the leavening agent and the anti-coking agent, thereby changing the melting temperature of the coke residue, leading the coke to be soft and easy to fall, being easy to remove and effectively preventing the trouble of serious coking of the combustion furnace.
Because of the improved heat efficiency of the furnace, the coal consumption of unit output is saved, and the use of the smoke suppressor, the discharge amount of smoke dust is greatly reduced, and the corresponding reduction of CO2And (4) discharging. This is very important to protect the environment in which humans rely on to survive.
Scope of use of the invention
The coal additive of the invention has the suggested action amount as follows:
the coal and additive are mixed uniformly according to the ratio of 100-.
Claims (4)
1. An environment-friendly energy-saving fire coal additive is characterized by comprising the following components in percentage by weight:
30 to 82.5 percent of chromium slag and 5 to 30 percent of calcium oxide
2 to 15 percent of magnesium oxide and 1 to 4 percent of silicon dioxide
Sodium chloride 5-20 wt% and pyrolusite fine powder 1-5 wt%
0.5 to 6 percent of potassium permanganate and 3 to 12 percent of combustible substance.
2. The environment-friendly energy-saving coal additive as claimed in claim 1, wherein the weight percentage of the chromium slag is 70-82%.
3. The environment-friendly energy-saving coal additive as claimed in claim 2, wherein the weight percentage of the chromium slag is 82%.
4. An environment-friendly energy-saving coal additive according to claim 1, 2 or 3, wherein the combustible substance is petroleum resin or rosin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510013262 CN1281725C (en) | 2005-03-31 | 2005-03-31 | Environmental protection energy-saving coal additives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510013262 CN1281725C (en) | 2005-03-31 | 2005-03-31 | Environmental protection energy-saving coal additives |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1667100A CN1667100A (en) | 2005-09-14 |
| CN1281725C true CN1281725C (en) | 2006-10-25 |
Family
ID=35038384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510013262 Expired - Fee Related CN1281725C (en) | 2005-03-31 | 2005-03-31 | Environmental protection energy-saving coal additives |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1281725C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106190427B (en) * | 2016-08-17 | 2019-04-19 | 宫小奕 | A kind of boiler fired coal additive and preparation method thereof and application method |
| CN107267250B (en) * | 2017-06-19 | 2020-07-24 | 中国电力建设工程咨询中南有限公司 | Boiler anti-contamination additive and preparation and application thereof |
-
2005
- 2005-03-31 CN CN 200510013262 patent/CN1281725C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1667100A (en) | 2005-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1784483A (en) | Compositon for preventing scaling,excluding of soot,clinker and sludge,and controlling flame in combustion apparatus | |
| JP7204156B2 (en) | Pre-dechlorination and sintering process for highly chlorinated metallurgical waste and incineration fly ash | |
| CN101053908A (en) | Pyrolytic treatment method for chromium slag | |
| CN107267252B (en) | Cement kiln fire coal combustion improver and preparation method thereof | |
| WO2017018628A1 (en) | Fossil fuel and livestock manure combustion promoter for harmful discharge gas and clinker inhibition and for complete combustion, and preparation method therefor | |
| CN108249892A (en) | A kind of method that cyanidation tailings harmless treatment prepares fired brick | |
| CN1127776A (en) | Sulfur-immobilizing coal-saving additive | |
| CN113915619A (en) | Waste fan blade treatment device for rotary kiln and plasma melting furnace | |
| CN202792039U (en) | Combined-type incinerator | |
| CN1281725C (en) | Environmental protection energy-saving coal additives | |
| CN1396239A (en) | Additive of fuel coal and mud-type fuel coal | |
| KR100833345B1 (en) | Combustion accelerating agent for solid fuel | |
| JP2007238350A (en) | Method for producing foamed glass | |
| CN111548840A (en) | Special coking inhibitor for hazardous waste incinerator and preparation method and application thereof | |
| KR101569632B1 (en) | Coal Additives Compositions For Reducing Harmful Gas And Coal Use And Clinker Removal | |
| CN101358154A (en) | High-efficient and low consumptive fire coal additive agent special for boiler | |
| CN108793650B (en) | Treatment method of steel rolling oily sludge | |
| JP2008273749A (en) | Artificial aggregate and its manufacturing method | |
| CN101067102A (en) | Coal-burning energy releasing powder and its prepn | |
| JP2007254863A (en) | Sintered material with the use of organic waste, method for producing the sintered material, and refining method | |
| CN103611410A (en) | Method for treating yellow phosphorus tail gas | |
| JP2009262067A (en) | Roasting treatment method for incineration residue | |
| CN1060675A (en) | Design method of waste slag coal-saving additive | |
| CN211012436U (en) | Utilize blue charcoal innocent treatment rubbish flying dust device | |
| WO2022224986A1 (en) | Unburnt carbon reduction method and heating method using ferric oxide |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061025 Termination date: 20130331 |