CN210448720U - Hg and SO3Low-temperature electric dust removal system with synergistic removal function - Google Patents
Hg and SO3Low-temperature electric dust removal system with synergistic removal function Download PDFInfo
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- CN210448720U CN210448720U CN201920426025.6U CN201920426025U CN210448720U CN 210448720 U CN210448720 U CN 210448720U CN 201920426025 U CN201920426025 U CN 201920426025U CN 210448720 U CN210448720 U CN 210448720U
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Abstract
The utility model provides a Hg, SO3The low-temperature electric dust removal system comprises a boiler, an SCR denitration system, an air preheater, a flue gas cooler, a low-temperature electric dust remover, a gas-liquid separator and a gas-liquid separator, wherein the boiler, the SCR denitration system, the air preheater, the gas-liquid separator, the low-temperature electric dust remover and the gas-liquid separator,The desulfurization tower and the chimney further comprise a modified fly ash injection system and a base dry powder injection system, wherein the modified fly ash injection system comprises an ash bin, a fly ash modification device, a fly ash bin and a fly ash injection device, the output end of an ash hopper at the bottom of the low-temperature electric precipitator is connected with the ash bin, one ash hopper is communicated with the fly ash modification device, the injection end of the fly ash injection device is arranged at the air inlet end of the flue gas cooler, the base dry powder injection system comprises a pretreatment device, a base dry powder bin and a base dry powder injection device, and the injection end of the base dry powder injection device is arranged at the air outlet end of the flue gas cooler. Has the functions of dust removal and Hg and SO3The high-efficiency removal function of the method is particularly suitable for projects with high-sulfur coal or low-sulfur ash.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a coal-fired flue gas purification's technical field, especially a Hg, SO3A low-temperature electric dust removal system with synergistic removal.
[ background of the invention ]
The improvement of the smoke pollution control level of the coal-fired power plant is of great importance to the improvement of the current atmospheric quality situation of cities in China. In view of the great environmental and social influences of particulate matter pollution, three committees such as national development and transformation committee jointly issue a coal-electric energy conservation, emission reduction, upgrade and transformation action plan (2014-2020), which definitely stipulates that the emission concentration of atmospheric pollutants of newly-built coal-fired power generating units in east regions basically reaches the standard limit value of a gas turbine unit, namely under the condition that the reference oxygen content is 6%, smoke dust and SO2、NOxThe discharge concentration is not higher than 10mg/m3、35mg/m3、50mg/m3Encourages new units in western regions to approach or reach the gas turbine unit standard limit. The ultra-low emission has become the main melody of pollution control of coal-fired units.
The artificial mercury emission mainly comes from coal, coal is the main fuel energy in China, the emission of coal-fired power stations becomes the main emission source of mercury, and the mercury pollution of the generated coal is more and more concerned in China. Compared with other pollutants, SO in the flue gas discharged by the coal-fired boiler3The concentration of (b) is low, but the concentration of (b) is harmful to equipment downstream of the flue and the atmospheric environment. SO (SO)3The sulfuric acid mist can be combined with water vapor after passing through the spray tower, and the pipeline equipment at the tail part of the flue is easy to corrode. The substandard emission of the flue gas is the main cause of air pollution. Coal fired power plant is currently on SO3And Hg removal are performed by separate removal systems, and few of them can perform SO removal3And Hg are jointly removed, and Hg and SO are provided3A low-temperature electric dust removal system with synergistic removal.
[ Utility model ] content
The purpose of the utility model is to solve the problems in the prior art and provide Hg and SO3The low-temperature electric dust removal system with synergistic removal has the dust removal function and has Hg and SO3The high-efficiency removal function of the method is particularly suitable for projects with high-sulfur coal or low-sulfur ash.
In order to achieve the purpose, the utility model provides an Hg, SO3Low temperature electrostatic precipitator system of desorption in coordination, include boiler, SCR deNOx systems, air heater, flue gas cooler, low temperature electrostatic precipitator, desulfurizing tower and the chimney that sets gradually according to flue gas treatment process direction, still include modified flying dust injection system and basic group dry powder injection system, modified flying dust injection system includes ash storehouse, flying dust modification device, flying dust feed bin and flying dust injection device, low temperature electrostatic precipitator's bottom is equipped with a plurality of ash bucket, and the output of every ash bucket all links to each other with the ash storehouse, and the output of one of them ash bucket is linked together with the input of flying dust modification device, flying dust injection device's injection end sets up in flue gas cooler's inlet end, basic group dry powder injection system includes preprocessing device, basic group dry powder feed bin and basic group dry powder injection device, basic group dry powder injection deviceThe spraying end of the spraying device is arranged at the air outlet end of the flue gas cooler.
Preferably, the output end of the fly ash modification device is communicated with a fly ash bin, and the output end of the fly ash bin is communicated with a fly ash injection device.
Preferably, the fly ash modification device is connected with a modifier storage tank, the modifier storage tank provides halogen compound agents for the fly ash modification device, the discharge end of the first electric field ash bucket of the low-temperature electric dust remover is connected with an ash conveying pipeline, the input end of the fly ash modification device is communicated with the output end of the ash conveying pipeline, a grinding device is further arranged in the fly ash modification device, coarse ash of the first electric field ash bucket of the low-temperature electric dust remover is used as a raw material, and the fly ash modification device grinds the raw material and is assisted with the mixing and modification of the halogen compound agents.
Preferably, the fly ash bin is further connected with an activated carbon injection device, and the activated carbon injection device provides activated carbon for the fly ash bin.
Preferably, the output end of the pretreatment device is connected with a base dry powder bin, and the output end of the base dry powder bin is connected with a base dry powder spraying device.
Preferably, the pretreatment apparatus is further connected to a base substance injection apparatus which supplies a base substance to the pretreatment apparatus.
The utility model has the advantages that: the utility model discloses a to modify flying dust injection apparatus arrange before flue gas cooler, can adsorb the gaseous state Hg in the flue gas, basic dry powder injection apparatus arranges behind flue gas cooler, can adsorb the sulfuric acid mist after the condensation in with, and the specially adapted high-sulfur coal (Sar > 2%) or the lower engineering of grey sulphur ratio (D/S) have dust removal function simultaneously, have Hg, SO concurrently3The high-efficiency removal function of the catalyst.
The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.
[ description of the drawings ]
FIG. 1 shows Hg and SO of the present invention3Low-temperature electric dust remover with synergistic removalA schematic structural diagram of the system;
FIG. 2 shows Hg and SO according to the present invention3An enlarged schematic diagram of a part of the structure of the low-temperature electric dust removal system with synergistic removal.
[ detailed description ] embodiments
Referring to fig. 1 and 2, the utility model relates to Hg and SO3The low-temperature electric dust removal system comprises a boiler 1, an SCR denitration system 2, an air preheater 3, a flue gas cooler 4, a low-temperature electric dust remover 5, a desulfurizing tower 6 and a chimney 7 which are sequentially arranged according to the flue gas treatment flow direction, and further comprises a modified fly ash injection system and a base dry powder injection system, wherein the modified fly ash injection system comprises an ash bin 8, a fly ash modification device 9, a fly ash bin 10 and a fly ash injection device 11, the bottom of the low-temperature electric dust remover 5 is provided with a plurality of ash hoppers, the output end of each ash hopper is connected with the ash bin 8, the output end of one ash hopper is communicated with the input end of the fly ash modification device 9, the injection end of the fly ash injection device 11 is arranged at the air inlet end of the flue gas cooler 4, and the base dry powder injection system comprises a pretreatment device 12, a base dry powder bin 13 and a base dry powder, the spraying end of the base dry powder spraying device 14 is arranged at the air outlet end of the flue gas cooler 4. The output end of the fly ash modification device 9 is communicated with a fly ash bin 10, and the output end of the fly ash bin 10 is communicated with a fly ash injection device 11. The fly ash modification device 9 is connected with a modifier storage tank 91, the modifier storage tank 91 provides halogen compound medicament for the fly ash modification device 9, the discharge end of the first electric field ash bucket 51 of the low-temperature electric dust remover 5 is connected with an ash conveying pipeline 52, the input end of the fly ash modification device 9 is communicated with the output end of the ash conveying pipeline 52, a grinding device is further arranged in the fly ash modification device 9, coarse ash of the first electric field ash bucket 51 of the low-temperature electric dust remover 5 is used as a raw material, and the fly ash modification device 9 is used for grinding and is assisted with the mixing modification of the halogen compound medicament. The fly ash bin 10 is also connected with an activated carbon injection device, and the activated carbon injection device provides activated carbon for the fly ash bin 10. The output end of the pretreatment device 12 is connected with a base dry powder bin 13, and the output end of the base dry powder bin 13 is connected with a base dry powder spraying device 14And (4) connecting. The pretreatment device 12 is also connected to a basic substance injection device which supplies a basic substance to the pretreatment device 12.
The utility model discloses the working process:
the utility model relates to a Hg, SO3The working principle of the low-temperature electric precipitation system with the synergistic removal is as follows: the modified fly ash injection device is arranged in front of the flue gas cooler, coarse ash in the No. 1 electric field of the low-temperature electric dust remover is used as a base material, and the base material is mixed with halogen (fluorine, chlorine, bromine, iodine and the like) compound agents after being mechanically ground and crushed, and is injected into the flue gas to adsorb gaseous Hg in the flue gas. The flue gas cooler reduces the temperature of the flue gas from about 130 ℃ to below 90 ℃, and fully condenses SO3 in the flue gas. The basic dry powder injection device is arranged behind the flue gas cooler, and the basic dry powder is properly injected, so that the condensed sulfuric acid mist can be effectively adsorbed and neutralized, and the basic dry powder injection device is particularly suitable for high-sulfur coal (Sar is more than 2%) or projects with lower ash-sulfur ratio (D/S). Has the functions of dust removal and Hg and SO3The Hg concentration of the flue gas at the outlet of the low-temperature electric precipitator is less than 5 mu g/m3The embodiment of SO3 being less than 1ppm is to the explanation of the present invention, not to the limitation of the present invention, and any scheme after the simple conversion of the present invention all belongs to the protection scope of the present invention.
Claims (6)
1. Hg and SO3The low-temperature electric precipitation system of synergistic desorption, its characterized in that: including boiler (1), SCR deNOx systems (2), air heater (3), flue gas cooler (4), low temperature electrostatic precipitator (5), desulfurizing tower (6) and chimney (7) that set gradually according to flue gas treatment flow direction, still include modified flying dust injection system and basic group dry powder injection system, modified flying dust injection system includes ash storehouse (8), flying dust modification device (9), flying dust feed bin (10) and flying dust injection device (11), the bottom of low temperature electrostatic precipitator (5) is equipped with a plurality of ash bucket, and the output of every ash bucket all links to each other with ash storehouse (8), and the output of one of them ash bucket is linked together with the input of flying dust modification device (9), the injection end of flying dust injection device (11) sets up in the inlet end of flue gas cooler (4), basic group dry powder injection systemThe base dry powder spraying device comprises a pretreatment device (12), a base dry powder bin (13) and a base dry powder spraying device (14), wherein the spraying end of the base dry powder spraying device (14) is arranged at the air outlet end of a flue gas cooler (4).
2. An Hg, SO according to claim 13The low-temperature electric precipitation system of synergistic desorption, its characterized in that: the output end of the fly ash modification device (9) is communicated with a fly ash bin (10), and the output end of the fly ash bin (10) is communicated with a fly ash injection device (11).
3. An Hg, SO according to claim 1 or 23The low-temperature electric precipitation system of synergistic desorption, its characterized in that: be connected with modifier bin (91) on flying dust modification device (9), modifier bin (91) provides the halogen compound medicament for flying dust modification device (9), the discharge end of first electric field ash bucket (51) of low temperature electrostatic precipitator (5) is connected with defeated ash pipeline (52), the input of flying dust modification device (9) and the output of defeated ash pipeline (52) be linked together, still be equipped with grinder in flying dust modification device (9) to the coarse ash of first electric field ash bucket (51) of low temperature electrostatic precipitator (5) is the raw materials, grinds and is assisted by flying dust modification device (9) and mixes the modification with the halogen compound medicament.
4. An Hg, SO according to claim 1 or 23The low-temperature electric precipitation system of synergistic desorption, its characterized in that: the fly ash bin (10) is also connected with an activated carbon injection device, and the activated carbon injection device provides activated carbon for the fly ash bin (10).
5. An Hg, SO according to claim 13The low-temperature electric precipitation system of synergistic desorption, its characterized in that: the output end of the pretreatment device (12) is connected with an alkali-based dry powder bin (13), and the output end of the alkali-based dry powder bin (13) is connected with an alkali-based dry powder spraying device (14).
6. An Hg, SO according to claim 53CollaborationThe low temperature electrostatic precipitator system of desorption, its characterized in that: the pretreatment device (12) is also connected with a basic substance injection device which provides basic substances for the pretreatment device (12).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920426025.6U CN210448720U (en) | 2019-04-01 | 2019-04-01 | Hg and SO3Low-temperature electric dust removal system with synergistic removal function |
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| CN201920426025.6U CN210448720U (en) | 2019-04-01 | 2019-04-01 | Hg and SO3Low-temperature electric dust removal system with synergistic removal function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110052155A (en) * | 2019-04-01 | 2019-07-26 | 浙江菲达环保科技股份有限公司 | A kind of Hg, SO3The system with low-low temperature ESP of cooperation-removal |
| CN113414006A (en) * | 2021-06-21 | 2021-09-21 | 河北中科朗博环保科技有限公司 | Electric dust removal system with fly ash modification and flue injection device |
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2019
- 2019-04-01 CN CN201920426025.6U patent/CN210448720U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110052155A (en) * | 2019-04-01 | 2019-07-26 | 浙江菲达环保科技股份有限公司 | A kind of Hg, SO3The system with low-low temperature ESP of cooperation-removal |
| CN113414006A (en) * | 2021-06-21 | 2021-09-21 | 河北中科朗博环保科技有限公司 | Electric dust removal system with fly ash modification and flue injection device |
| CN113414006B (en) * | 2021-06-21 | 2022-03-04 | 河北中科朗博环保科技有限公司 | Electric dust removal system with fly ash modification and flue injection device |
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