CN1117140C - Efficient sulfur-fixating agent for fuel coal and its preparing process and application - Google Patents
Efficient sulfur-fixating agent for fuel coal and its preparing process and application Download PDFInfo
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- CN1117140C CN1117140C CN 01114874 CN01114874A CN1117140C CN 1117140 C CN1117140 C CN 1117140C CN 01114874 CN01114874 CN 01114874 CN 01114874 A CN01114874 A CN 01114874A CN 1117140 C CN1117140 C CN 1117140C
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Abstract
The present invention provides an efficient sulfur-fixing agent for burning coal and preparing method and application thereof. The present invention is characterized in that the main body of the sulfur-fixing agent is limestone ore; hematite, magnesite, kaolin clay, ore of the class of clay, solid alkaline compounds, waste iron powder and one or more waste industrial catalysts are added to the limestone ore; the materials are pulverized, sieved, stirred and mixed into the sulfur-fixing agent; the content of the assistant is controlled within the range of 1.5 to 15 wt%. The present invention which has good catalyzing and sulfur-fixing effect, low price and high efficiency is applicable to desulfurizing burning coal with medium and high sulfur content. Simultaneously, the present invention provides coal burning and desulfurizing technology with low investment cost and simple operation, which is particularly suitable for processing coal-fired flue gas of a large coal burning power plant.
Description
The present invention relates to a kind of efficient fuel coal sulfur stabilizing agent and its production and use, be suitable for the discharging that reduces SO2 in the coal-fired product.Belong to coal-fired additive technical field.
Reality produce and life in, the burning raw coal produce contain in a large amount of waste gas, particularly waste gas a large amount of sulfurous gas severe contamination atmospheric environment.In order to reduce sulfurous gas to atmospheric pollution, at present the pollutent in the waste gas has been taked some desulfurization measures, the employing of these measures can reduce the discharging of sulfurous gas in the waste gas, but has the shortcoming of cost height, sweetening effectiveness difference.For example the Chinese patent communique discloses the patent of invention that a kind of name is called " a kind of efficient composite sulphur-fixing agent for coal burning fume ", patent publication No. " CN1239733A ", be characterized in: constitute by the lime powder of 60-90% and the auxiliary agent catalyzer of 10-40%, during use described sulphur-fixing agent and fire coal are mixed burning.But there is following shortcoming in this patent: it is raw material that (1) described auxiliary agent adopts industrial reagent in a large number, and addition is the 10-40wt% of sulphur-fixing agent, and cost is higher relatively; (2) sulphur-fixing agent and coal-fired mixed firing, Gu sulphur component efficient is on the low side, sweetening effectiveness is poor, the flue gas desulfurization of high-sulfur fire coal in not being suitable for.
The objective of the invention is provides a kind of efficient fuel coal sulfur stabilizing agent and using method thereof in order to overcome the shortcoming of prior art sulphur-fixing agent cost height, sweetening effectiveness difference.
Purpose of the present invention can reach by taking following measure: a kind of efficient fuel coal sulfur stabilizing agent, be characterized in: form by host and auxiliary agent, host is that natural limestone, its weight percentage are 85-99%, auxiliary agent is the mixture of solid alkaline thing or commercial catalysts or solid alkaline thing and commercial catalysts, and its weight percentage is 1-15%.
Purpose of the present invention also can reach by taking following measure:
Auxiliary agent is mixed by in solid alkaline thing, industrial spent catalyst and rhombohedral iron ore, magnesite, kaolin, clay class ore, scrap iron powder, the non-metallic minerals one or more, and the auxiliary agent weight percentage is controlled in the 1.5-15% scope.
Described commercial catalysts is industrial spent catalyst.
Described auxiliary agent mainly contains the oxide compound or the oxyhydroxide of metals such as Mg, AI, Fe, Na.
Described host is selected the natural limestone mineral for use, and these class mineral are mainly oxide compound or the salt of Ca.
The present invention introduces flue gas desulfurization with the catalysis notion, adds porous material (as industrial spent catalyst, kaolin), has improved the specific surface and the adsorptive power of sulphur-fixing agent, and then has improved the desulfuration efficiency of sulphur-fixing agent.For middle high-sulfur fire coal, introduce an amount of highly basic center in the sulphur-fixing agent, improve active centre density and then improved the efficient of reaction desulfuration, high-sulfur coal-fired flue gas desulfurization rate in can improving.
The preparation method of foregoing a kind of efficient fuel coal sulfur stabilizing agent is characterized in:
1) adopt natural limestone mineral or industrial waste to make host through pulverizing;
2) according to the characteristic of fire coal, select the mixture of solid alkaline thing or commercial catalysts or solid alkaline thing and commercial catalysts, make the auxiliary agent powder;
3) 1.5-15% and host powder mixes are ground and are made efficient fuel coal sulfur stabilizing agent by weight percentage with aforementioned auxiliary agent powder.
The purposes of foregoing a kind of efficient fuel coal sulfur stabilizing agent is characterized in: the catalysis notion is introduced flue gas desulfurization, add porous material (as industrial spent catalyst, kaolin), the sulfur removal technology process is as follows:
1) efficient fuel coal sulfur stabilizing agent is placed storage tank, then with described sulphur-fixing agent by the compress wind pulsed rise to high-order feeding warehouse;
2) adopt spiral pump that described sulphur-fixing agent is transported to nozzle;
3) last wind by roots blower is ejected into desulfurization in the roasting kiln.
Compared with prior art, the present invention has following outstanding advantage:
1. host content height, auxiliary agent is mixed by in solid alkaline thing, industrial spent catalyst and rhombohedral iron ore, magnesite, kaolin, clay class ore, scrap iron powder, the non-metallic minerals one or more, and agent content is low and raw material sources abundant, conveniently be easy to get low cost product.
2. the present invention introduces flue gas desulfurization with the catalysis notion, adds porous material (as industrial spent catalyst, kaolin), has improved the specific surface and the adsorptive power of sulphur-fixing agent, and then has improved the desulfuration efficiency of sulphur-fixing agent.Be suitable for the processing of large-size thermal power plant coal-fired flue-gas.
Describe the present invention below in conjunction with embodiment:
Fig. 1 is a kind of desulfurization process figure of the present invention.
Embodiment 1:
The batching of all sulphur-fixing agents is all pulverized, below porphyrize to 100 order, taken by weighing host Wingdale 98.5 grams of sulphur-fixing agent, take by weighing Auxiliaries Industry alkali 1.5 grams again, they are mixed, left standstill 1-2 days, and mixture was ground sieve again, gained is the sulphur-fixing agent finished product.
Embodiment 2
The batching of all sulphur-fixing agents is all pulverized, below porphyrize to 100 order, taken by weighing host dolomitic limestone 95 grams of sulphur-fixing agent, take by weighing industrial soda 3 grams again, industry spent catalyst 2 grams mix them, leave standstill 1-2 days, mixture is ground again and sieve, gained is the sulphur-fixing agent finished product.
Embodiment 3
Take by weighing sulphur-fixing agent 87.5 grams that embodiment 1 makes, all auxiliary agents are all pulverized, below porphyrize to 100 order, taken by weighing ground hematite 6 grams and magnesite breeze 2 grams, industry spent catalyst 4.5 grams mix them, leave standstill 1-2 days, mixture is ground again and sieve, gained is the sulphur-fixing agent finished product.
Embodiment 4
Take by weighing sulphur-fixing agent 95 grams of embodiment 2, take by weighing scrap iron powder 2 grams and magnesite breeze 2 grams, clay breeze 1 gram mixes them, leaves standstill 1-2 days, mixture is ground sieve again, and gained is the sulphur-fixing agent finished product.
Embodiment 5
Take by weighing sulphur-fixing agent 90 grams of embodiment 2, take by weighing ground hematite 6 grams and magnesite breeze 2.5 grams, kaolin powder 1.5 grams mix them, leave standstill 1-2 days, mixture is ground sieve again, and gained is the sulphur-fixing agent finished product.
Embodiment 6
Get 6.0 milligrams of embodiment 1 sulphur-fixing agent finished products, 100 milligrams in the Fuxin coal (total sulphur content 0.702wt%) of same granularity, mix in the sulphur detector of packing into, furnace temperature is raised to combustion reaction temperature, connect total system, feed quantitative air, place 500 ℃ of districts to stop 5 minutes more in sample to discharge volatile matter and to prevent the coal sample detonation, then it is pushed the flat-temperature zone, burnt 20 minutes, SO2 is by the H2O2 solution absorption in the tail gas. by sulfuric acid amount in the titration measuring absorption liquid, being scaled sulfur-fixing rate again. the sulfur-fixing rate in the time of its 800 ℃ is 59.05%, 900 ℃ are 69.96%, 1000 ℃ is 57.21%, and 1100C 23.25%
Embodiment 7
Get 6.0 milligrams of embodiment 2 sulphur-fixing agent finished products, 100 milligrams in the Fuxin coal (total sulphur content 0.702wt%) of same granularity, mix in the sulphur detector of packing into, furnace temperature is raised to combustion reaction temperature, connect total system, feed quantitative air, place 500 ℃ of districts to stop 5 minutes more in sample, then it is pushed the flat-temperature zone, burnt 20 minutes to discharge volatile matter and to prevent the coal sample detonation, SO2 is by the H2O2 solution absorption in the tail gas. by sulfuric acid amount in the titration measuring absorption liquid, be scaled sulfur-fixing rate again, it is 67.85% that the sulfur-fixing rate in the time of its 800 ℃ is 58.14%, 900 ℃, 1000 ℃ is 57.10%, and 1100C 23.85%
Embodiment 8
Get 6.0 milligrams of embodiment 3 sulphur-fixing agent finished products, 100 milligrams in the Fuxin coal (total sulphur content 0.702wt%) of same granularity, mix in the sulphur detector of packing into, furnace temperature is raised to combustion reaction temperature, connects total system, feed quantitative air, place 500 ℃ of districts to stop 5 minutes more in sample to discharge volatile matter and to prevent the coal sample detonation, then it is pushed the flat-temperature zone, burnt 20 minutes, SO2 is by the H2O2 solution absorption in the tail gas.By sulfuric acid amount in the titration measuring absorption liquid, be scaled sulfur-fixing rate again.Sulfur-fixing rate in the time of its 800 ℃ is 54.37%, 900 ℃, and to be 63.83%, 1000 ℃ be 52.01%, and 1100C 25.87%
Embodiment 9
Get 6.0 milligrams of embodiment 4 sulphur-fixing agent finished products, 100 milligrams in the Fuxin coal (total sulphur content 0.702wt%) of same granularity, mix in the sulphur detector of packing into, furnace temperature is raised to combustion reaction temperature, connects total system, feed quantitative air, place 500 ℃ of districts to stop 5 minutes more in sample to discharge volatile matter and to prevent the coal sample detonation, then it is pushed the flat-temperature zone, burnt 20 minutes, SO2 is by the H2O2 solution absorption in the tail gas.By sulfuric acid amount in the titration measuring absorption liquid, be scaled sulfur-fixing rate again.Sulfur-fixing rate in the time of its 800 ℃ is 58.15%, 900 ℃, and to be 69.23%, 1000 ℃ be 56.35%, and 1100C 24.18%.
Embodiment 10
Get 6.0 milligrams of embodiment 5 sulphur-fixing agent finished products, 100 milligrams in the Fuxin coal (total sulphur content 0.702wt%) of same granularity, mix in the sulphur detector of packing into, furnace temperature is raised to combustion reaction temperature, connects total system, feed quantitative air, place 500 ℃ of districts to stop 5 minutes more in sample to discharge volatile matter and to prevent the coal sample detonation, then it is pushed the flat-temperature zone, burnt 20 minutes, SO2 is by the H2O2 solution absorption in the tail gas.By sulfuric acid amount in the titration measuring absorption liquid, be scaled sulfur-fixing rate again.Sulfur-fixing rate in the time of its 800 ℃ is 55.30%, 900 ℃, and to be 65.72%, 1000 ℃ be 55.88%, and 1100C 23.43%.
As can be seen from Figure 1, the present invention introduces flue gas desulfurization with the catalysis notion, adds porous material (as industrial spent catalyst, kaolin), and the sulfur removal technology process is as follows:
1) efficient fuel coal sulfur stabilizing agent is placed storage tank 1, then with described sulphur-fixing agent by compression fan 2 pulseds rise to high-order feeding warehouse 3;
2) adopt spiral pump 4 that described sulphur-fixing agent is transported to nozzle 5;
3) last wind by roots blower 6 divides two-way to be ejected into desulfurization in the roasting kiln.
Claims (5)
1. efficient fuel coal sulfur stabilizing agent, it is characterized in that: be made up of host and auxiliary agent, host is that natural limestone, its weight percentage are 85-99%, and auxiliary agent is an industrial soda, and its weight percentage is 1-15%.
2. a kind of efficient fuel coal sulfur stabilizing agent according to claim 1 is characterized in that: the auxiliary agent weight percentage is controlled in the 1.5-15% scope.
3. a kind of efficient fuel coal sulfur stabilizing agent according to claim 1 is characterized in that: described host is selected the natural limestone mineral for use, and these class mineral are mainly oxide compound or the salt of Ca.
4. the preparation method of a kind of efficient fuel coal sulfur stabilizing agent as claimed in claim 1 is characterized in that:
1) adopt the natural limestone mineral to make host through pulverizing;
2) select industrial soda to make the auxiliary agent powder;
3) with aforementioned auxiliary agent powder 1.5-15% and host mixed grinding and make efficient fuel coal sulfur stabilizing agent by weight percentage.
5. the purposes of a kind of efficient fuel coal sulfur stabilizing agent as claimed in claim 1 is characterized in that: use the sulfur removal technology process of this sulphur-fixing agent as follows:
1) efficient fuel coal sulfur stabilizing agent is placed storage tank (1), then with described sulphur-fixing agent by compression fan (2) pulsed rise to high-order feeding warehouse (3);
2) adopt spiral pump (4) that described sulphur-fixing agent is transported to nozzle (5);
3) be ejected into desulfurization in the roasting kiln by the wind of roots blower (6) at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114874 CN1117140C (en) | 2001-07-02 | 2001-07-02 | Efficient sulfur-fixating agent for fuel coal and its preparing process and application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01114874 CN1117140C (en) | 2001-07-02 | 2001-07-02 | Efficient sulfur-fixating agent for fuel coal and its preparing process and application |
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| CN1334324A CN1334324A (en) | 2002-02-06 |
| CN1117140C true CN1117140C (en) | 2003-08-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102580485A (en) * | 2012-02-24 | 2012-07-18 | 辽宁科技大学 | Flue gas desulfurization method for preparing desulfurizer by utilizing magnesite tailings obtained through flotation |
| CN104178240B (en) * | 2014-08-11 | 2015-08-12 | 江苏省镔鑫钢铁集团有限公司 | Utilize high ferro to give up and admittedly prepare the method for coal combustion catalyst |
| 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 |
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