CN102787000A - Coal firing boiler smoke gas dry process desulfurizing agent with calorific value - Google Patents
Coal firing boiler smoke gas dry process desulfurizing agent with calorific value Download PDFInfo
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- CN102787000A CN102787000A CN201210280616XA CN201210280616A CN102787000A CN 102787000 A CN102787000 A CN 102787000A CN 201210280616X A CN201210280616X A CN 201210280616XA CN 201210280616 A CN201210280616 A CN 201210280616A CN 102787000 A CN102787000 A CN 102787000A
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- desulfurizing agent
- carbide slag
- calorific value
- biological material
- firing boiler
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Abstract
The invention discloses a coal firing boiler smoke gas dry process desulfurizing agent with the calorific value. The coal firing boiler smoke gas dry process desulfurizing agent is prepared from the following steps that after biomass materials are crushed, the mixing and granulation work procedures are carried out according to a proportion ratio of carbide slag to the biomass materials being 1:(0.16-0.36), and particular solid specially used for in-furnace mixed burning desulfurizing is prepared. The density of the desulfurizing agent is 1.1 to 1.4 g/cm<3>, and the particle size is 6 to 10mm. The biomass materials are plant straws, crop leftovers, tree leaves or weeds. The desulfurizing agent provided by the invention overcomes the defects of the carbide slag used as the desulfurizing agent and solves the utilization problem of the biomass materials including the plant straws, crop leftovers, tree leaves, weeds and the like.
Description
Technical field
The present invention relates to a kind of coal-fired flue gas desulfurization agent, be applicable to circular fluid bed flue gas desulfurization.
Technical background
The tradition coal firing boiler adopts limestone powder as the desulfuration in furnace agent mostly, and raw materials cost is higher, and moisture-sensitive caking blocking pipe, and desulfurization causes boiler heat loss simultaneously.Carbide slag is the industrial residue during generated by polyvinyl chloride by calcium carbide is produced, and its butt CaO content is about 65%.As the sweetening agent raw material, realized not only that waste resource recovery is sharp with carbide slag, cheap with raw materials cost, and solved the environmental pollution that a large amount of carbide slag stackings is caused to a great extent.At present, wet processing is adopted in 80% above calcium carbide hydrolysis in China's Production of PVC, and the carbide slag that is produced water cut after press filtration is handled still reaches about 40%, is pasty state thickness slag slurry, and transportation, storage be difficulty very.Say that from composition carbide slag contains a large amount of calcium hydroxide; Be good coal-fired flue gas desulfurization agent, the method for existing use carbide slag desulfurization, generally be with coal mix burn and stove after the wet method dual mode; Wherein mixing burning with coal needs earlier the carbide slag airing to be dewatered, and the easy blocking pipeline.Wet desulphurization exists then that equipment attrition is big, running cost is high, system is huge behind the stove, investment is than problems such as height.
Biological materials such as straw class, crops leftovers (like Pericarppium arachidis hypogaeae, corn cob etc.), leaf, weeds, it mainly becomes organism such as Mierocrystalline cellulose.There is data to show that the calorific value of this type of material is about 15000KJ/Kg, is equivalent to 50% of standard coal equivalent calorific value.And its sulphur content is extremely low, is merely 3.8 ‰, and its flue gas sulfur that acts as a fuel is up to standard fully.But the technology of domestic pure biological material generating is still immature, and installed capacity is generally less, and the fuel ratio heavy and light, and volume is big, and it is vast that heap goes into to store the place, also needs support equipments such as a series of rainproof, moistureproof, fire prevention, and investment construction and maintenance cost are big.
Summary of the invention
In order to overcome the defective that carbide slag exists as the sweetening agent raw material; And solve the problem of utilizing of biological materials such as straw class, crops leftovers, leaf, weeds; The present invention provides in the calcareous stove that combines to prepare coal firing boiler of a kind of combustionproperty of utilizing biological material and carbide slag and mixes the burning sweetening agent; Promptly realize the changing waste into resources utilization, alleviated the environmental pollution of coal firing boiler again.
For achieving the above object, the technical scheme that the present invention takes is:
It is after biological material is pulverized, to be 1 according to carbide slag and biological material mass ratio: the ratio blending of (0.16～0.36), granulating working procedure, and the particulate solid that burns desulfurization is mixed in being exclusively used in of preparing in the stove; This sweetening agent density is 1.1～1.4g/cm
3, particle diameter is 6～10mm.
Above-mentioned carbide slag is that slurry water cut after press filtration of wet method acetylene generation technology generation in the generated by polyvinyl chloride by calcium carbide production process is 40% foundry loam.
Above-mentioned biological material is straw class, crops leftovers (like Pericarppium arachidis hypogaeae, corn cob etc.), leaf, weeds etc.
Preparing method of the present invention is following:
The first step: with the biological material process powder that hay cutter prescinds, kibbler is crushed into particle diameter 0.1～2mm (, be prone to during pulverizing be mingled with the small amount of fibers silk, but do not influence product performance) after the outsourcing collection because the raw material water cut is different;
Second step: is 1 with the powdered biomass of the carbide slag and the first step according to mass ratio: (0.16～0.36) ratio joins stirrer mixes, and sends into the Squeezinggranulator granulating and forming behind two kinds of raw material even blend;
The 3rd step:, excessive moisture in the pellet is taken out of, simultaneously airborne CO at the reverse warm air that is blown into of pellet outlet
2With particle surface Ca (OH)
2Reaction generates CaCO
3The film coatedparticles prevents particle bond.The final pellet that forms particle diameter 6～10mm is sent into finished product bin after dedusting.
Advantage of the present invention is:
1, solid desulfurating agent of the present invention contains 20%～37% biological material.Press biological material calorific value average 15000KJ/Kg and calculate, this sweetening agent has 3000～5550KJ/Kg calorific value, is equivalent to mark 10.2%～18.9% of coal.In coal firing boiler, mix the defective of both having avoided traditional sweetening agent heat absorption power consumption when burning, also certain heat can be provided.
2, the mass ratio that passes through this carbide slag of conciliation and this biomass powder is between 1:0.16～0.36, and the density of may command sweetening agent is between 1.1～1.4g/cm3.Through the template perforate aperture of regulation and control Squeezinggranulator, may command sweetening agent particle diameter is between 6～10mm.Finally make sorbent particle and circular fluid bed go into stove coal density, the particle diameter index is suitable, can mix burning with fire coal, almost follows whole coal burning process at boiler internal, helps timely desulfurization.
3, after the biological material burning ash content about 3% is only arranged, the outer biological material of solid desulfurating agent of the present invention outer support after the stove internal combustion is weak, and particle and coal grain frictional impact on every side come out inside is calcareous gradually.Follow the burning gradually of the inner biological material of sweetening agent simultaneously, the granule interior space increases gradually, enlarges calcareous and the flue gas contact surface, thereby makes calcareous utilization more abundant.
4, the traditional lime stone flour is mixed and is burnt not only cost height of sulfur removal technology, and moisture absorption caking stops up the pan feeding pipeline easily.Simple carbide slag is mixed and is burnt sulfur removal technology then because of the thickness pan feeding difficulty of carbide slag own, also causes the coking of stove inwall easily.Sweetening agent of the present invention is the dried particulate solid; Not only raw materials cost is cheap, the transportation convenient for storing, can be with coal grain pan feeding, do not have the line clogging problem, and can avoid limestone-based process to exploit the lime ore deposit in a large number and carbide slag is stored up the environmental pollution that is caused.
5, the used biological material wide material sources of the present invention do not have the region restriction, and are renewable resources.The present invention can use on carbide slag output ground nearby, has not only solved a upper reaches acetylene unit industrial waste residue disposal difficult problem, and has avoided the inconvenience of carbide slag slurries long-distance transport, for the coal firing boiler away from the carbide slag place of production provides cheap sweetening agent.
6, mix burning in the sweetening agent stove of the present invention, the gypsum that in desulfurization, generates gets into slag, makes calcium sulphate content increase in the slag, helps the recycling of boiler ash.
Below through cost benefit estimation explanation advantage of the present invention.
A) product material cost per ton:
B) product benefit:
By raw material calcium carbide slag butt CaO content 65%, but with carbide slag unit consumption * 60% * 65%/56 * 64 sweetening agent per ton treatment S O in theory
2593～468kg.
This product contains 20%～37% biological material, and by biological material calorific value average 15000KJ/Kg, product burning per ton will produce 3000～5,500 million burnt heats, be equivalent to 102.4～187.7kg mark coal.By 0.7 yuan of 1kg mark coal price value, this product heat energy is worth 71.68～131.39 yuan/t.
The present invention is that worker, agricultural wastes are able to a kind of new way that resource utilization is utilized again, can be used as the practicality of coal firing boiler sweetening agent simultaneously.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Enforcement of the present invention such as summary of the invention are said, and technical scheme that those skilled in the art put down in writing to specifications and technical process shown in Figure 1 can be implemented, and are not described in detail in this.
Claims (2)
1. fire coal boiler fume dry-desulphurizer with calorific value; It is characterized in that; It is after biological material is pulverized; According to carbide slag and biological material mass ratio is 1: the ratio blending of (0.16～0.36), granulating working procedure, and the particulate solid that burns desulfurization is mixed in being exclusively used in of preparing in the stove; This sweetening agent density is 1.1～1.4g/cm
3, particle diameter is 6～10mm.
Above-mentioned carbide slag is that slurry water cut after press filtration of wet method acetylene generation technology generation in the generated by polyvinyl chloride by calcium carbide production process is 40% foundry loam;
Above-mentioned biological material is straw class, crops leftovers, leaf or weeds.
2. the preparation method with fire coal boiler fume dry-desulphurizer of calorific value as claimed in claim 1 is characterized in that,
The first step: with the biological material process powder that hay cutter prescinds, kibbler is crushed into particle diameter 0.1～2mm after the outsourcing collection;
Second step: is 1 with the powdered biomass of the carbide slag and the first step according to mass ratio: (0.16～0.36) ratio joins stirrer mixes, and sends into the Squeezinggranulator granulating and forming behind two kinds of raw material even blend;
The 3rd step:, excessive moisture in the pellet is taken out of, simultaneously airborne CO at the reverse warm air that is blown into of pellet outlet
2With particle surface Ca (OH)
2Reaction generates CaCO
3The film coatedparticles prevents particle bond; The final pellet that forms particle diameter 6～10mm is sent into finished product bin after dedusting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210280616XA CN102787000A (en) | 2012-08-08 | 2012-08-08 | Coal firing boiler smoke gas dry process desulfurizing agent with calorific value |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210280616XA CN102787000A (en) | 2012-08-08 | 2012-08-08 | Coal firing boiler smoke gas dry process desulfurizing agent with calorific value |
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| CN102787000A true CN102787000A (en) | 2012-11-21 |
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| CN201210280616XA Pending CN102787000A (en) | 2012-08-08 | 2012-08-08 | Coal firing boiler smoke gas dry process desulfurizing agent with calorific value |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826585A (en) * | 2015-04-22 | 2015-08-12 | 芜湖市鸿坤汽车零部件有限公司 | High mechanical strength economic and environmentally friendly desulphurization activated carbon and preparation method thereof |
| CN108704470A (en) * | 2018-05-15 | 2018-10-26 | 山西大学 | Carbide slag composite calcium based desulphurizing agent based on biomass hardening, tempering and preparation method thereof |
| CN112604611A (en) * | 2020-11-26 | 2021-04-06 | 清华大学 | Device and method for carrying out chemical energy storage/discharge by using carbide slag |
| CN112920870A (en) * | 2021-01-25 | 2021-06-08 | 安徽省融工博大环保技术材料研究院有限公司 | Biomass straw fuel with incineration ash having gelling property and preparation method and application thereof |
| CN114028925A (en) * | 2021-05-27 | 2022-02-11 | 苏州仕净环保科技股份有限公司 | Desulfurization and denitrification agent for flue gas and desulfurization and denitrification method and device thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1895742A (en) * | 2006-06-30 | 2007-01-17 | 山东泉林纸业有限责任公司 | Coal-fired boiler smoke devulcanization |
| CN102604711A (en) * | 2012-02-27 | 2012-07-25 | 刘奇 | Multifunctional coal burning sectional desulfurizing agent, civil coal stove desulfurizer and mixed coal |
-
2012
- 2012-08-08 CN CN201210280616XA patent/CN102787000A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1895742A (en) * | 2006-06-30 | 2007-01-17 | 山东泉林纸业有限责任公司 | Coal-fired boiler smoke devulcanization |
| CN102604711A (en) * | 2012-02-27 | 2012-07-25 | 刘奇 | Multifunctional coal burning sectional desulfurizing agent, civil coal stove desulfurizer and mixed coal |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104826585A (en) * | 2015-04-22 | 2015-08-12 | 芜湖市鸿坤汽车零部件有限公司 | High mechanical strength economic and environmentally friendly desulphurization activated carbon and preparation method thereof |
| CN108704470A (en) * | 2018-05-15 | 2018-10-26 | 山西大学 | Carbide slag composite calcium based desulphurizing agent based on biomass hardening, tempering and preparation method thereof |
| CN112604611A (en) * | 2020-11-26 | 2021-04-06 | 清华大学 | Device and method for carrying out chemical energy storage/discharge by using carbide slag |
| CN112920870A (en) * | 2021-01-25 | 2021-06-08 | 安徽省融工博大环保技术材料研究院有限公司 | Biomass straw fuel with incineration ash having gelling property and preparation method and application thereof |
| CN114028925A (en) * | 2021-05-27 | 2022-02-11 | 苏州仕净环保科技股份有限公司 | Desulfurization and denitrification agent for flue gas and desulfurization and denitrification method and device thereof |
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Application publication date: 20121121 |