CN1377943A - High temperature coal combustion supporting and sulphur fixing agent - Google Patents
High temperature coal combustion supporting and sulphur fixing agent Download PDFInfo
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- CN1377943A CN1377943A CN 01110303 CN01110303A CN1377943A CN 1377943 A CN1377943 A CN 1377943A CN 01110303 CN01110303 CN 01110303 CN 01110303 A CN01110303 A CN 01110303A CN 1377943 A CN1377943 A CN 1377943A
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Abstract
The high temperature coal combustion assisting and sulphur fixing agent has Ca and Mg ore as main material, and sodium nitrate, potassium permanganate, blast furnace slag and alumina as supplementary amterial. During its compounding, dilute nitric acid and ammonia water is added. Using the coal combustion assisting and sulphur fixing agent and cealize stable desulfurization at high temperatureand saving power with the sulphur fixing rate reaching 60-80 % and coal saving rate 5-10%.
Description
The invention relates to a high-temperature coal combustion-supporting sulfur-fixing agent.
Currently, the main fuel for industrial or domestic boilers and kilns is coal, but because of the high sulfur content in coal, a large amount of SO is generated during the combustion of coal2And smoke dust seriously pollute the atmosphere and cause environmental pollution. Therefore, one or more of oxides (or hydroxides, salts and the like) of magnesium, iron, calcium, aluminum, silicon and the like are adopted by countries such as the United states and the Japan as combustion-supporting desulfurizer for coal burning, so as to solve the problem of air pollution in the process of coal burning. But the desulfurization and dust removal effect of the scheme is poor. On the basis of the above-mentioned technological scheme, the calcium carbonate in the ore is firstly made into calcium oxide, then reacted with sulfur dioxide to produce calcium sulfate, and discharged with the slag so as to attain the goal of removing dust and desulfurizing. However, the sulfur fixing agent of the technical scheme is only suitable for CaSO generated by the combustion at 800-900 ℃ and once the furnace temperature is higher than 900 DEG C4Then gradually decomposed with the temperature rise to generate SO2： Therefore, the sulfur fixation is unstable, and when the temperature of the furnace rises to 1200 ℃, pure pyrolysis is generated, so that the sulfur fixation is ineffective.
The invention aims to provide a high-temperature coal combustion-supporting sulfur fixing agent which has high desulfurization and dust removal efficiency and is energy-saving.
The purpose of the invention is realized as follows: the high-temperature fire coal combustion-supporting sulfur-fixing agent takes 70-80 parts of Ca and Mg-containing ore with the weight part ratio of 140 meshes of 120-plus as a main base material, and is matched with 2-4 parts of sodium nitrate, 0.1-0.2 part of potassium permanganate, 5-15 parts of blast furnace slag with 140 meshes of 120-plus and alumite; the production process comprises the following steps: firstly, adding 1-1.5 parts of dilute nitric acid with the concentration of 36% -38% into ore powder containing Ca and Mg, stirring, adding alunite and blast furnace slag while stirring uniformly, adding ammonia water after stirring uniformly, controlling the pH value to be 8-9, finally adding sodium nitrate and potassium permanganate, and stirring uniformly to obtain the finished product.
The invention selects substances which can provide various metal ions and other necessary cations as additives to form a composite sulfur-fixing agent, thereby inhibiting CaSO at high temperature4The decomposition or the delayed decomposition temperature is realized, and the main mechanism is the formation of a heat-resistant phase and the inclusion and fusion of a molten phase; selecting a high-efficiency sulfur-fixing catalyst to increase the reaction activity of the sulfur-fixing agent; meanwhile, a proper bulking agent, a combustion improver and a substance capable of improving the ash melting point are also selected. So as to improve the combustion effect and avoid slag bonding caused by low melting point of coal ash in combustion, and the basic reaction equation is (taking dolomite for sulfur fixation as an example): the magnesium carbonate after thermal decomposition is rapidly half-calcined at high temperature, wherein MgO generated by reaction can be regarded as an inert reactant and is discharged along with furnace slag:
the reaction process is exothermic. Therefore, ore powder containing special metal ions and other cations and containing Ca and Mg is selected as an additive, so that CaSO can be effectively inhibited4The main mechanism is the formation of a heat-resistant phase and the inclusion and fusion of a molten phase to basically generate a Ca-X-S-Si-O system.(wherein X represents a variable valence metal element such as Fe, Mn), a heat-resistant silicate stable phase CaX is formed due to the addition of Ca-X-Si oxide3(SiO4)2OH to cover or encapsulate CaSO4Crystal to delay and stop CaSO4The sulfur fixation rate is obviously improved by decomposition. When the sulfur fixing agent is used, the sulfur fixing agent can be added into the fire coal in a ratio of 1: 50-1: 30, and the ratio relation can also be adjusted according to the difference of sulfur content in the fire coal. The sulfur-fixing agent can realize stable desulfurization at high temperature and greatly save energy, and the desulfurization rate can reach over 60-80%. The coal saving rate can reach more than 5-10%.
The invention is further described below by way of examples:
| ingredients (Kg) | Example 1 | Example 2 | Example 3 |
| Dolomite (magnesium diamond) | 70 | 75 | 80 |
| Blast furnace slag | 5 | 10 | 15 |
| Aluminumite | 5 | 10 | 15 |
| Sodium nitrate | 2 | 3 | 4 |
| Potassium permanganate | 0.1 | 0.15 | 0.2 |
| Dilute nitric acid | 1 | 1.3 | 1.5 |
The amounts of the components are as described above. Firstly, adding 36-38% dilute nitric acid into fine dolomite or magnesium-magnesite powder, stirring, adding 36-38% dilute nitric acid while stirring uniformly, adding 120-140 mesh alumite and blast furnace slag while stirring uniformly, adding ammonia water after stirring uniformly, wherein the adding amount of the ammonia water is preferably controlled to control the PH value of the ammonia water to be 8-9, and finally adding sodium nitrate and potassium permanganate, and fully stirring to prepare the high-temperature coal-fired combustion-supporting sulfur-fixing agent.
Claims (2)
1. A high-temperature combustion-supporting sulfur-fixing agent for burning coal is characterized in that 70-80 parts by weight of ore containing Ca and Mg with the proportion of 140 meshes of 120-plus materials are taken as main base materials, and 2-4 parts by weight of sodium nitrate, 0.1-0.2 part by weight of potassium permanganate, 5-15 parts by weight of blast furnace slag with 140 meshes of 120-plus materials and alunite are further matched; the process comprises the following steps: firstly, adding 1-1.5 parts of dilute nitric acid with the concentration of 36% -38% into ore powder containing Ca and Mg, stirring, adding alunite and blast furnace slag while stirring uniformly, adding ammonia water after stirring uniformly, controlling the pH value to be 8-9, finally adding sodium nitrate and potassium permanganate, and stirring uniformly to obtain the finished product.
2. The high-temperature coal-fired combustion-supporting sulfur-fixing agent as claimed in claim 1, characterized in that the ore containing Ca and Mg is dolomite or magnesiate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01110303 CN1377943A (en) | 2001-04-02 | 2001-04-02 | High temperature coal combustion supporting and sulphur fixing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01110303 CN1377943A (en) | 2001-04-02 | 2001-04-02 | High temperature coal combustion supporting and sulphur fixing agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1377943A true CN1377943A (en) | 2002-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01110303 Pending CN1377943A (en) | 2001-04-02 | 2001-04-02 | High temperature coal combustion supporting and sulphur fixing agent |
Country Status (1)
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| CN (1) | CN1377943A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101607172B (en) * | 2008-06-16 | 2011-07-27 | 中国科学院过程工程研究所 | Desulfurizer for desulfurization of smoke and method for preparing same |
| CN104449943A (en) * | 2014-12-23 | 2015-03-25 | 刘生金 | Fire coal combustion-supporting desulfurization powder for flue gas desulfurization and preparation method thereof |
| CN104830396A (en) * | 2015-05-12 | 2015-08-12 | 天津神侬环保科技有限公司 | Preparation method of sludge clean fuel |
| CN106800959A (en) * | 2017-02-21 | 2017-06-06 | 辽宁天宝华瑞建材有限公司 | Coal combustion supporting and sulphur fixing agent |
| CN112742204A (en) * | 2020-12-30 | 2021-05-04 | 铜陵铜冠神虹化工有限责任公司 | Flue gas sulfur-fixing agent used in sodium sulfide synthesis process and preparation process thereof |
-
2001
- 2001-04-02 CN CN 01110303 patent/CN1377943A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101607172B (en) * | 2008-06-16 | 2011-07-27 | 中国科学院过程工程研究所 | Desulfurizer for desulfurization of smoke and method for preparing same |
| CN104449943A (en) * | 2014-12-23 | 2015-03-25 | 刘生金 | Fire coal combustion-supporting desulfurization powder for flue gas desulfurization and preparation method thereof |
| CN104830396A (en) * | 2015-05-12 | 2015-08-12 | 天津神侬环保科技有限公司 | Preparation method of sludge clean fuel |
| CN106800959A (en) * | 2017-02-21 | 2017-06-06 | 辽宁天宝华瑞建材有限公司 | Coal combustion supporting and sulphur fixing agent |
| CN112742204A (en) * | 2020-12-30 | 2021-05-04 | 铜陵铜冠神虹化工有限责任公司 | Flue gas sulfur-fixing agent used in sodium sulfide synthesis process and preparation process thereof |
| CN112742204B (en) * | 2020-12-30 | 2022-07-19 | 铜陵铜冠环保科技有限公司 | Flue gas sulfur-fixing agent used in sodium sulfide synthesis process and preparation process thereof |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhang Weiyan Document name: Deemed as a notice of withdrawal |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |