CN101837241A - Desulfuration process and device thereof - Google Patents
Desulfuration process and device thereof Download PDFInfo
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- CN101837241A CN101837241A CN201010171943A CN201010171943A CN101837241A CN 101837241 A CN101837241 A CN 101837241A CN 201010171943 A CN201010171943 A CN 201010171943A CN 201010171943 A CN201010171943 A CN 201010171943A CN 101837241 A CN101837241 A CN 101837241A
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Abstract
The invention discloses a desulfuration process. The process comprises the following steps of: combusting a desulfuration agent and coal together to generate smoke and cinder, treating the smoke by using water, flushing the cinder, treating the formed waste water, and then treating the smoke produced by the combustion of the desulfuration agent and the coal and flushing the cinder produced by the combustion of the desulfuration agent and the coal by using the waste water so as to form a circulating system. The process saves a gypsum crystallization system, a drying system and a limestone slurry-making system in a wet limestone/lime-gypsum desulfuration device so as to greatly simplify the structure and reduce the cost; and the process recycles the cinder flushing water to remove sulfur-containing gas from the smoke and uses the desulfuration agent taking sludge as a main raw material, so the method reduces secondary pollution, can save the coal by 6 to 12 percent, has the desulfuration efficiency of 95 percent, and has remarkable environmental benefit and economic benefit.
Description
Technical field
The present invention relates to the coal-fired and industrial coal technology of a kind of electric power, relate in particular to a kind of flue gas desulfurization technique and device thereof.
Background technology
Announce according to environmental quality, China's sulfur dioxide (SO2) emissions total amount occupies the first in the world, exceed atmospheric environment capacity 80%, to the end of the year 2005, in state-owned more than 50 tame desulfurization companies successively introduced Germany, the U.S., Japan, Sweden, Italy, Austria, the flue gas desulfurization technique of states such as Korea S and device, but these technology and device all are developed country's eighties of last century to be used the thirties, the overwhelming majority is a wet type limestone/lime-gypsum doctor treatment, the sulfur removal technology of described wet type limestone/lime-gypsum doctor treatment comprises limestone crushing, grind after stirring is mixed with lime stone slurry, lime stone slurry is sent into flue gas in the spray column spray washing flue, the gypsum that produces is through crystallization, drying system is handled the back and is discharged, the discharge of wastewater that produces, this doctor treatment is complex process not only, systematic running cost is with high, and the apparatus structure complexity, and cost of investment is big, and the waste water calcium plaster that forms does not have the value of recycling major part because of reasons such as quality to be abandoned, and environment is caused severe contamination.
Summary of the invention
The object of the present invention is to provide a kind of circular treatment, reduce the sulfur removal technology that discharges.
Second purpose of the present invention is to provide a kind of desulfurizer that is used for above-mentioned sulfur removal technology, and this apparatus structure is simple.
The object of the present invention is achieved like this, a kind of sulfur removal technology, described technology comprises that desulfurizing agent and fire coal burn together, produce flue gas and cinder, with the described flue gas of water treatment, wash described cinder, be used further to handle the cinder of flue gas, the described desulfurizing agent of flushing and the fired coal combustion generation of described desulfurizing agent and fired coal combustion generation after the wastewater treatment that forms, form the circulatory system.
In order to improve the treatment effect to flue gas, described wastewater treatment is that the waste water after the described smoke treatment is carried out oxidation processes, and the waste water behind the described flushing cinder carries out physical treatment.
In order to make desulfurizing agent and fired coal combustion abundant, improve desulfurized effect, described desulfurizing agent and coal-fired through pulverizing, the coal-grinding after-combustion, produce flue gas and cinder, described flue gas is former flue gas, described former flue gas is after dedusting, becoming clean flue gas through the water spray washing discharges, the waste water that forms is as spraying waste water through be used to wash the cinder of described desulfurizing agent and fired coal combustion generation after the oxidation processes as flushing cinder water, described cinder is after the water flushing, through dragging for slag, filter to isolate cinder and supernatant, described cinder is discharged, described supernatant is used further to the flue gas of described desulfurizing agent of spray washing and fired coal combustion generation, circulation successively after pressurization.
In order further to improve desulfurized effect, reduce secondary pollution, above-mentioned desulfurizing agent is made by the raw material of the following meter of percentage composition by weight: mud 50～60%, magnesia and/or lime stone 20～30%, sodium carbonate and/or aluminium oxide 10～15%, oxalic acid 5～10%.
In order to guarantee desulfurized effect and can save fire coal that the interpolation weight of described desulfurizing agent in fire coal is 6～12% of desulfurizing agent and coal-fired gross weight.
Second purpose of the present invention is to realize like this, a kind of desulfurizer that is used for above-mentioned sulfur removal technology, it is characterized in that: described desulfurizer comprise boiler and be communicated with described boiler advance coal channel, circulating water pipeline and flue, described circulating water pipeline passes flue and is communicated with slagging channel.
In order to be easy to discharge flue gas and cinder, above-mentionedly advance coal channel and be communicated with above-mentioned boiler side walls, above-mentioned circulating water pipeline is communicated with above-mentioned boiler bottom, and above-mentioned flue is communicated with above-mentioned upper boiler.
In order to make desulfurizing agent and fired coal combustion fully and improve desulfurized effect, above-mentionedly advance on the coal channel to be provided with former scuttle storehouse, disintegrating machine, coal pulverizer successively, described coal pulverizer is communicated with above-mentioned boiler by Pulverized Coal Bin; Be provided with the desulfurizing agent automatic feeder between described former scuttle storehouse and the described disintegrating machine; Be provided with slag bath, dragveyer, filtering ponds, water circulating pump, spray column and oxidation pond on the above-mentioned circulating water pipeline successively, described slag bath is arranged on the below of described boiler and is communicated with described boiler bottom, described spray column is arranged on the top of above-mentioned flue, and passes described flue; The end of described flue is a chimney, is provided with electric precipitation between described chimney and the described boiler; Above-mentioned slagging channel is communicated with described filtering ponds and described dragveyer.
Above-mentioned desulfurizer adopts above-mentioned sulfur removal technology, with above-mentioned desulfurizing agent and fire coal together in the boiler internal combustion, described desulfurizing agent can make coal-fired physical organization loose, form spongiform structure, and can utilize moisture content in the fire coal to be penetrated in the coal-fired particulate and go, microparticle surfaces at fire coal forms coating, the sulfur dioxide that element sulphur in the fire coal is produced in thermal response, sulfur trioxide is by described coating chemisorbed (conversion) and physical absorption (solid phase), the basic anhydride in the cinder that desulfurizing agent and fired coal combustion produce have been increased, dwindled ratio with acidic oxide, reduced the slagging index of boiler cinder, simultaneously, the sulphur of solid phase is converted into Sulfates material etc., finish desulfurization preliminary treatment in the boiler, the sulfur in smoke content that makes desulfurizing agent and fired coal combustion produce reduces by 50～60%, has alleviated the desulfurization burden of spray column spray washing flue gas significantly; Be used to wash the water absorption sulfur in smoke of flue gas and be converted into the Sulfates material, the waste water that forms washes described cinder as flushing cinder water after oxidation processes, send the Sulfates material to cinder, and the molten cinder neutral and alkali oxide of taking, alkaline solution after filtering is used further to remove the sulfurous gas in the flue gas that desulfurizing agent and fired coal combustion produce, finish the main body desulfurization, successively circulation.
PH value when the water that is used to wash flue gas leaves spray column is 5.5～6.5, and can reach 9～13 through the pH value of the flushing cinder water behind flushing cinder pond, dragveyer, the filtering ponds, the flushing cinder water of this basicity is after the water circulating pump pressurization, enter spray column spray washing flue gas, can effectively remove gases such as sulfur dioxide.
The present invention has following beneficial effect:
1, the flushing cinder water circulation use removes sulfurous gas in the flue gas in the sulfur removal technology of the present invention, and use with the desulfurizing agent of mud as primary raw material, reduced the use amount of all lime stones 98% of wet type limestone/lime-gypsum method desulfurization, a large amount of exploitation lime stones have been exempted to environment damage, also reduced simultaneously the secondary pollution that wet type limestone/lime-gypsum method-desulfurization of gypsum method causes, and can save fire coal 6～12%, desulfuration efficiency reaches 95%, has significant environmental benefit and economic benefit.
2, desulfurizer of the present invention has been cancelled gypsum crystallization, drying system and the lime stone pulping system etc. in the wet type limestone/lime-gypsum method desulfurizer, simplifies the structure significantly, has reduced cost.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Accompanying drawing 1 embodiment of the invention desulfurizer schematic diagram.
Accompanying drawing 2 is embodiment of the invention desulfurization process figure.
The specific embodiment
Advance coal channel 2 and be communicated with boiler 1 sidewall, circulating water pipeline 3 is communicated with boiler 1 bottom, and flue 4 is communicated with boiler 1 top.
Advance to be provided with former scuttle storehouse 6, disintegrating machine 7, coal pulverizer 8 on the coal channel 2 successively, coal pulverizer 8 is communicated with boiler 1 by Pulverized Coal Bin 9; Be provided with desulfurizing agent automatic feeder 10 between former scuttle storehouse 6 and the disintegrating machine 7; Be provided with slag bath 11, dragveyer 12, filtering ponds 13, water circulating pump 14, spray column 15, water circulating pump 16 and oxidation pond 17 on the circulating water pipeline 3 successively, slag bath 11 is arranged on the below of boiler 1 and is communicated with boiler 1 bottom, and spray column 15 is arranged on the top of flue 4 and passes flue 4; The end of flue 4 is a chimney 18, is provided with electric precipitation 19 between chimney 18 and the boiler 1; Slagging channel 5 is communicated with filtering ponds 13 and dragveyer 12 respectively.
Utilize the sulfur removal technology of above-mentioned desulfurizer, this technology comprises: by automatic feeder 10 desulfurizing agent is added in the raw coal, grind through disintegrating machine 7 fragmentations, coal pulverizer 8, enter Pulverized Coal Bin 9, be blown into boiler 1 and burn; The interpolation weight of this desulfurizing agent is 8% of desulfurizing agent and coal-fired gross weight, and the raw material composition of this desulfurizing agent sees Table 1; Desulfurizing agent and coal-fired the burning in boiler 1 are produced flue gas and cinder, flue gas enters flue 4, cinder enters circulating water pipeline 3, the water that is used for washing flue gas enters the former flue gas of spray column 15 spray washing flues 4 through electric precipitations 19 through water circulating pump 14 pressurizations, become spray waste water, former flue gas after the washing becomes clean flue gas discharges from chimney 18, and this spray waste water pressurizes after peroxidating pond 17 becomes flushing cinder water according to conventional oxidation processes through water circulating pump 16; After the water that is used to wash cinder drags for slag, filtering ponds 13 and filters through dragveyer 12, isolated cinder is discharged from Residue extraction pipeline 5, separated liquid supernatant enters spray column 15 after water circulating pump 14 pressurizations, flue gas from spray column 15 spray washing flues 4, absorbing sulfur in smoke becomes spray waste water, successively circulation.
Embodiment 2, and used desulfurizer and sulfur removal technology are with embodiment 1, and the raw material of desulfurizer therefor is formed and addition sees Table 1.
Embodiment 6, and used desulfurizer and sulfur removal technology are with embodiment 1, and the raw material of desulfurizer therefor is formed and addition sees Table 1.
Table 1
| Desulfurizing agent raw material and | Embodiment | 1 | Embodiment 2 | |
|
|
Embodiment 6 |
| Mud (%) | ??60 | ??55 | ??50 | ??60 | ??55 | ??50 | |
| Magnesia (%) | ??15 | ??23 | ??0 | ??5 | ??10 | ??20 | |
| Lime stone (%) | ??10 | ??0 | ??30 | ??20 | ??15 | ??5 | |
| Calcium carbonate (%) | ??5 | ??15 | ??0 | ??2 | ??4 | ??8 |
| Desulfurizing agent raw material and | Embodiment | 1 | Embodiment 2 | |
|
|
Embodiment 6 |
| Aluminium oxide (%) | ??5 | ??0 | ??10 | ??8 | ??6 | ??2 | |
| Oxalic acid (%) | ??5 | ??7 | ??10 | ??5 | ??7 | ??10 | |
| The addition of desulfurizing agent accounts for the weight percentage (%) of desulfurizing agent and coal-fired total amount | ??8 | ??6 | ??7 | ??9 | ??10 | ??12 |
Claims (8)
1. sulfur removal technology, it is characterized in that: described technology comprises that desulfurizing agent and fire coal burn together, produce flue gas and cinder, with the described flue gas of water treatment, wash described cinder, be used further to handle the cinder of flue gas, the described desulfurizing agent of flushing and the fired coal combustion generation of described desulfurizing agent and fired coal combustion generation after the wastewater treatment that forms, form the circulatory system.
2. sulfur removal technology as claimed in claim 1 is characterized in that: described wastewater treatment is that the waste water that the waste water after the described smoke treatment carries out behind oxidation processes, the described flushing cinder is carried out physical treatment.
3. sulfur removal technology as claimed in claim 2, it is characterized in that: described technology comprises described desulfurizing agent and coal-fired through pulverizing, coal-grinding after-combustion, produce former flue gas and cinder, described former flue gas water spray washing after dedusting, become clean flue gas and discharge, the spray waste water of formation is used to wash described cinder through after the oxidation processes as flushing cinder water; Through dragging for slag, filtering to isolate cinder and supernatant, this cinder is discharged behind the described flushing cinder water flushing cinder, and described supernatant is used further to the flue gas of described desulfurizing agent of spray washing and fired coal combustion generation, circulation successively after pressurization.
4. as claim 1,2 or 3 described sulfur removal technologies, it is characterized in that: described desulfurizing agent is made by the raw material of the following meter of percentage composition by weight: mud 50～60%, magnesia and/or lime stone 20～30%, sodium carbonate and/or aluminium oxide 10～15%, oxalic acid 5～10%.
5. sulfur removal technology as claimed in claim 4 is characterized in that: the interpolation weight of described desulfurizing agent in fire coal is 6～12% of desulfurizing agent and coal-fired gross weight.
6. desulfurizer that is used for as claim 1～5 sulfur removal technology as described in each, it is characterized in that: described desulfurizer comprise boiler (1) and be communicated with described boiler (1) advance coal channel (2), circulating water pipeline (3) and flue (4), described circulating water pipeline (3) passes flue (4) and is communicated with slagging channel (5).
7. desulfurizer as claimed in claim 6 is characterized in that: describedly advance coal channel (2) and be communicated with boiler (1) sidewall, described circulating water pipeline (3) is communicated with boiler (1) bottom, and described flue (4) is communicated with boiler (1) top.
8. desulfurizer as claimed in claim 7 is characterized in that: describedly advance on the coal channel (2) to be provided with former scuttle storehouse (6), disintegrating machine (7), coal pulverizer (8) successively, described coal pulverizer (8) is communicated with described boiler (1) by Pulverized Coal Bin (9); Be provided with desulfurizing agent automatic feeder (10) between described former scuttle storehouse (6) and the described disintegrating machine (7); Be provided with slag bath (11), dragveyer (12), filtering ponds (13), water circulating pump (14), spray column (15), water circulating pump (16) and oxidation pond (17) on the described circulating water pipeline (3) successively, described slag bath (11) is arranged on the below of boiler (1) and is communicated with boiler (1) bottom, described spray column (15) is arranged on the top of flue (4), and passes described flue (4); The end of described flue (4) is chimney (18), is provided with electric precipitation (19) between described chimney (18) and the described boiler (1); Described slagging channel (5) is communicated with described filtering ponds (13) and dragveyer (12).
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| CN201010171943A CN101837241A (en) | 2010-05-13 | 2010-05-13 | Desulfuration process and device thereof |
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| CN201010171943A CN101837241A (en) | 2010-05-13 | 2010-05-13 | Desulfuration process and device thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151481A (en) * | 2011-02-17 | 2011-08-17 | 大连海事大学 | Monitoring and automatic control system in desulfurization process for magnesium-based seawater ships |
| CN102794092A (en) * | 2012-07-23 | 2012-11-28 | 四川极度电控系统制造有限责任公司 | Fire coal flue gas wet method energy-saving desulfurization method |
| CN104403697A (en) * | 2014-11-26 | 2015-03-11 | 陕西延长石油（集团）有限责任公司 | Flue gas emission pollutant control process device for coal-fired boiler in power plant and control method |
| CN105114966A (en) * | 2015-08-25 | 2015-12-02 | 华电电力科学研究院 | Wet-type ash removing and waste heat using method and system for power plant pulverized coal boiler |
| CN105110601A (en) * | 2015-10-13 | 2015-12-02 | 中国石油化工股份有限公司 | Method for preparing desulfurization agent from excess activated sludge |
| CN107999268A (en) * | 2017-12-20 | 2018-05-08 | 安徽摩诃环保科技有限公司 | A kind of coal cleaning process of desulfurization |
| CN108548190A (en) * | 2018-04-26 | 2018-09-18 | 广州奇达瑞盛环保科技有限公司 | A kind of lean burn device |
| CN109354366A (en) * | 2018-11-16 | 2019-02-19 | 佛山科学技术学院 | A kind of device for treating sludge using catalytic wet air oxidation |
| CN111440630A (en) * | 2020-05-12 | 2020-07-24 | 江西省蓝洁环保科技工程有限公司 | Agricultural biological straw pyrolysis gasification activation method |
-
2010
- 2010-05-13 CN CN201010171943A patent/CN101837241A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102151481A (en) * | 2011-02-17 | 2011-08-17 | 大连海事大学 | Monitoring and automatic control system in desulfurization process for magnesium-based seawater ships |
| CN102151481B (en) * | 2011-02-17 | 2012-11-07 | 大连海事大学 | Monitoring and automatic control system in desulfurization process for magnesium-based seawater ships |
| CN102794092A (en) * | 2012-07-23 | 2012-11-28 | 四川极度电控系统制造有限责任公司 | Fire coal flue gas wet method energy-saving desulfurization method |
| CN104403697B (en) * | 2014-11-26 | 2016-08-24 | 陕西延长石油（集团）有限责任公司 | A kind of coal-fired boiler in power plant smoke emissioning pollution thing controls device and control method |
| CN104403697A (en) * | 2014-11-26 | 2015-03-11 | 陕西延长石油（集团）有限责任公司 | Flue gas emission pollutant control process device for coal-fired boiler in power plant and control method |
| CN105114966A (en) * | 2015-08-25 | 2015-12-02 | 华电电力科学研究院 | Wet-type ash removing and waste heat using method and system for power plant pulverized coal boiler |
| CN105110601A (en) * | 2015-10-13 | 2015-12-02 | 中国石油化工股份有限公司 | Method for preparing desulfurization agent from excess activated sludge |
| CN107999268A (en) * | 2017-12-20 | 2018-05-08 | 安徽摩诃环保科技有限公司 | A kind of coal cleaning process of desulfurization |
| CN107999268B (en) * | 2017-12-20 | 2020-01-07 | 安徽摩诃环保科技有限公司 | Desulfurization coal washing process |
| CN108548190A (en) * | 2018-04-26 | 2018-09-18 | 广州奇达瑞盛环保科技有限公司 | A kind of lean burn device |
| CN109354366A (en) * | 2018-11-16 | 2019-02-19 | 佛山科学技术学院 | A kind of device for treating sludge using catalytic wet air oxidation |
| CN109354366B (en) * | 2018-11-16 | 2021-12-24 | 佛山科学技术学院 | Sludge treatment equipment adopting catalytic wet oxidation method |
| CN111440630A (en) * | 2020-05-12 | 2020-07-24 | 江西省蓝洁环保科技工程有限公司 | Agricultural biological straw pyrolysis gasification activation method |
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Open date: 20100922 |