CN102343200A - Method and system for efficiently controlling mercury pollution of coal-fired power plant at low cost - Google Patents
Method and system for efficiently controlling mercury pollution of coal-fired power plant at low cost Download PDFInfo
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- CN102343200A CN102343200A CN2011102822929A CN201110282292A CN102343200A CN 102343200 A CN102343200 A CN 102343200A CN 2011102822929 A CN2011102822929 A CN 2011102822929A CN 201110282292 A CN201110282292 A CN 201110282292A CN 102343200 A CN102343200 A CN 102343200A
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Abstract
The invention discloses a method and system for efficiently controlling mercury pollution of a coal-fired power plant at low cost. The system comprises a primary hot air duct, a secondary hot air duct and a liquid storing tank, wherein the primary hot air duct and the secondary hot air duct are communicated with an air preheater and a hearth; a coal conveying system is communicated with a coal grinding system through a coal feeder; the liquid storing tank is filled with a halide additive solution; and the liquid storing tank is communicated with at least one of the coal conveying system, the coal feeder, the primary hot air duct and the secondary hot air duct. According to the system, the halide additive solution enters a boiler body and participates in a combustion reaction, the oxidation of the mercury in flue gas is promoted and the ratio of mercury oxide in the flue gas is increased, so that the synergetic demercuration effect of flue gas purifying equipment such as denitration equipment, desulfurization equipment, dedusting equipment and the like in a tail flue of a boiler is improved, and the mercury content of flue gas in a chimney is greatly lowered. A mercury pollutant control system has the advantages of small investment and low running cost while the mercury pollutant emission level of the coal-fired power plant can meet stricter environmental standard requirements.
Description
Technical field
The invention belongs to environmental protection technical field, relate to the groundwater pollution control of coal-burning power plant, be specifically related to a kind of coal-burning power plant's mercury pollution control method and system of high efficiency, low cost.
Background technology
Mercury is a kind of hypertoxicity material, can produce long-term and serious harm to environment, human body.And global coal-fired mercury emission accounts for 2/3 of artificial mercury emission.China is as consumption of coal big country, and mercury emissions that causes in the coal-fired process and pollution thereof are severe more.Therefore, China is listed mercury pollution control work in " heavy metal pollution control " 12 " planning ", and the mercury and the compound thereof that have tentatively proposed coal-burning power plant's discharging must be lower than 0.03mg/m
3The emission limit set requirement.
At present, a series of theoretical research has been carried out in domestic mercury pollution control to the coal-burning power plant, but does not carry out practical applications as yet.External then practice through has for many years accumulated the invaluable experience of coal-burning power plant's mercury pollution control.External ripe mercury pollution control technology mainly is divided into two types, and one type is absorption demercuration technology, and one type is collaborative demercuration technology.
Absorption demercuration technology is to utilize adsorbent such as active carbon, and the mercury in the flue gas is carried out adsorbing and removing.What patent " was used for removing the adsorbent and the corresponding demercuration method of flue gas mercury " (patent No. CN03816017.X) announce is exactly the Powdered bromination preparation method of active carbon that realizes that high-efficiency mercury removal is special-purpose, and adsorbent is sprayed into the method that realizes mercury pollution control behind the air preheater.The main feature of absorption demercuration technology is a wide adaptability, but investment and operating cost are high, and power plant generally is difficult to bear.
Collaborative demercuration technology then is to utilize the existing flue gas purifying equipment of power plant, when realizing desulfurization, denitration, dedusting, realizes collaborative demercuration.What patent " method of mercury removal for smoke desulfurizing system by fortified wetting " (patent No. 200610028333) was announced is exactly through in desulfurization slurry, adding some kinds of sulfur-bearing chemical stabilizers or chelating agent, improving the method for the demercuration efficient of wet desulfurization system.The main feature of collaborative demercuration technology is that investment and operating cost are lower, but demercuration efficient has received the restriction of flue gas purification system and coal.
Mercury in coal-burning power plant's discharging flue gas can be divided three classes: simple substance mercury, mercury oxide, particle mercury.Experimental study shows: the ratio of the simple substance mercury in the flue gas, relevant with the content of elements such as chlorine, bromine, calcium, iron in the coal, especially when content of halogen was low, the ratio of simple substance mercury was high in the flue gas.Dust pelletizing system can remove the particle mercury of the overwhelming majority, but limited to the removal effect of simple substance mercury and mercury oxide, and the being proportionate property of ratio of the ratio of particle mercury and mercury oxide.Desulphurization system can realize efficiently removing of mercury oxide, but simple substance mercury is not almost had removal effect.Denitrating system can make the simple substance mercury oxidation in the flue gas, but when content of halogen was low in the flue gas, oxidation effectiveness was poor.
Therefore; Collaborative demercuration technology is better to the removal effect of mercury oxide and particle mercury; But the removal effect to simple substance mercury is poor, and when the simple substance mercury content was very high in especially low when content of halogen in the coal, the flue gas, the collaborative demercuration effect of desulfurization, denitration, dust arrester all can obviously descend.And the content of halogen in China's coal is generally lower, therefore utilizes existing flue gas purification system possibly be difficult to obtain collaborative preferably demercuration effect simply.
By the end of the year 2009, in China coal-burning power plant, 100% cleaner is installed, and the unit that has a desulphurization system accounts for 71% of thermoelectricity installed capacity, the unit that has denitrating system accounts for 6.7% of thermoelectricity installed capacity, and will keep growing at top speed.Consider that simultaneously working in coordination with the demercuration technology compares with low cost with absorption demercuration technology; Therefore, make full use of existing flue gas purification system, exploitation can improve the technical matters of collaborative demercuration efficient; Be the mercury pollution control technology that is suitable for China coal-burning power plant, have very important significance.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art; The object of the present invention is to provide a kind of coal-burning power plant's mercury pollution control method and system of high efficiency, low cost; Through with villaumite; Bromine salt; Salt compounded of iodine or their mixture or contain their mixture; Add in the coal or in the combustion air as halide additive; Make halide additive get into burner hearth and participate in combustion reaction; Promote the oxidation of mercury in the flue gas; Improve the ratio of mercury oxide in the flue gas; Thereby denitration in the raising boiler back end ductwork; The collaborative demercuration effect of flue gas purifying equipment such as desulfurization and dedusting reduces the flue gas mercury content in the chimney significantly.When the satisfied stricter environmental protection standard of this system mercury contaminants emission level in can realizing the coal-fired plant boiler flue gas requires, have investment of mercury contaminants control system and the low advantage of operating cost.。
In order to solve the problems of the technologies described above, the technical scheme that the present invention adopts is:
A kind of coal-burning power plant mercury pollution control system of high efficiency, low cost; Make halide additive solution get into boiler body 6 and participate in burning; The simple substance mercury oxidation that promotes the boiler combustion reaction to generate is a divalence mercury; Thereby utilize the existing flue gas purifying equipment of boiler back end ductwork to realize effectively removing of mercury, the concentration range of said halide additive solution is 0.1～20mol/L.
Halide additive solution is directly sprayed into boiler body 6 participate in burning, halide additive is 1～1000mg/Nm with the ratio of the air capacity that gets into boiler body 6
3
Perhaps, halide additive solution is injected in the hot air duct, brings halide additive into boiler body 6 through hot blast and participate in burning, halide additive is 1～1000mg/Nm with the ratio of the air capacity that gets into boiler body 6
3
Perhaps, halide additive is got into boiler body 6 participate in burning after coal mixes, the ratio of halide additive addition and coal-supplying amount is 1～5000ppm.
The present invention also provides a kind of system of coal-burning power plant's mercury pollution control method of said high efficiency, low cost; Comprise the secondary wind hot air duct 7 that is communicated with boiler body 6; Secondary wind hot air duct 7 is communicated with air preheater 15; Air preheater 15 also is communicated with wind-heat airduct road 11 one time; One time wind-heat airduct road 11 is communicated with coal pulverizer 10; Coal pulverizer 10 is communicated with boiler body 6; Also comprise fluid reservoir 5; In fluid reservoir 5 and wind-heat airduct road 11 and the secondary wind hot air duct 7 at least one is connected, and halide additive solution is arranged in the fluid reservoir 5.
Realize the another kind of system of coal-burning power plant's mercury pollution control method of said high efficiency, low cost; Comprise a wind-heat airduct road 11 that is communicated with air preheater 15; One time wind-heat airduct road 11 is communicated with coal pulverizer 10; Coal pulverizer 10 is communicated with boiler body 6; Coal handling system 2 is communicated with coal pulverizer 10 through feeder 3, it is characterized in that, also comprises fluid reservoir 5; Fluid reservoir 5 is communicated with coal handling system 2 or feeder 3, and halide additive solution is arranged in the fluid reservoir 5.
Realize the another kind of system of coal-burning power plant's mercury pollution control method of said high efficiency, low cost; Comprise the secondary wind hot air duct 7 that is communicated with boiler body 6; Secondary wind hot air duct 7 also is communicated with secondary wind arm 21 and air preheater 15; Secondary wind arm 21 is communicated with coal pulverizer 10; Coal pulverizer 10 is connected with Pulverized Coal Bin 20 through coal dust classifier 19; Pulverized Coal Bin 20 is communicated with boiler body 6; Pulverized Coal Bin 20 is communicated with air preheater 15 through a wind-heat airduct road 11; Coal handling system 2 is communicated with coal pulverizer 10 through feeder 3; It is characterized in that; Also comprise fluid reservoir 5; Fluid reservoir 5 and coal handling system 2; Feeder 3; A wind-heat airduct road 11; In the secondary wind hot air duct 7 at least one is connected, and halide additive solution is arranged in the fluid reservoir 5.
In described several system, between the outlet of boiler body 6 and air preheater 15, denitrating system 14 is set, air preheater 15 is communicated with deduster 16, desulphurization system 17 and chimney 18 again successively.
In the described method and system; Halide is villaumite, bromine salt, salt compounded of iodine or their mixture or the mixture that contains them; Such as calcium chloride, calcium bromide, hydrobromic acid, KI or their mixture; Can also be to contain halid mixture, as: the mixture of calcium bromide, calcium chloride and sodium sulphate.
Compared with prior art, advantage of the present invention is:
1) low to content of halogen in China's coal; Thereby cause the high characteristics of simple substance mercury content in the flue gas; Through in coal and/or combustion air, adding halide additive; Make halide get into burner hearth uniformly and participate in burning; Can effectively increase the ratio of mercury oxide in the flue gas, thereby utilize the existing flue gas purification system in coal-burning power plant to obtain higher demercuration efficient.
2) this method only need add a spot of comparatively cheap halide additive and can realize mercury pollution control efficiently, and medicine machine is simple, and cost of investment and operating cost are all well below adsorbing the demercuration technology.
3) the actual multiple additives of having set forth of this method adds mode.Wherein, in coal handling system, add additive, have the advantage that system is simple, medicine system is few, but time-delay is longer if adopt; In feeder or coal pulverizer, add additive if adopt, the short operation of then delaying time is convenient, but medicine system quantity is more; In first and second hot blast, add additive if adopt, then the simple quantity of equipment is few, and easy to operate time-delay is short.
Description of drawings
Fig. 1 is the operation principle structural representation of embodiments of the invention 1, adopts in secondary wind hot air duct and a wind-heat airduct road, to add calcium chloride solution.
Fig. 2 is the operation principle structural representation of embodiments of the invention 2, adopts in a wind-heat airduct road of unit pulverized-coal system, to add calcium bromide solution.
Fig. 3 is the operation principle structural representation of embodiments of the invention 3, adopts the mixed solution that in a wind-heat airduct road of bin storage type pulverizing system, adds calcium bromide and calcium chloride.
Fig. 4 is the operation principle structural representation of embodiments of the invention 4, adopts in the secondary wind hot air duct of unit pulverized-coal system, to add hydrobromic acid solution, no denitrating system.
Fig. 5 is the operation principle structural representation of embodiments of the invention 5, adopts in the feeder of unit pulverized-coal system, to add calcium bromide solution.
Fig. 6 is the operation principle structural representation of embodiments of the invention 6, adopts the mixed solution that in the coal handling system of unit pulverized-coal system, adds calcium bromide, KI.
Fig. 7 is the operation principle structural representation of embodiments of the invention 7, adopts the mixed solution that in the feeder of bin storage type pulverizing system, adds calcium bromide, calcium chloride and sodium sulphate, no denitrating system.
The specific embodiment
Describe embodiment of the present invention in detail below in conjunction with accompanying drawing and embodiment.
Embodiment one
As shown in Figure 1; A kind of coal-burning power plant mercury pollution control system of high efficiency, low cost; Comprise the secondary wind hot air duct 7 that is communicated with boiler body 6; Secondary wind hot air duct 7 is communicated with air preheater 15; Also comprise a wind-heat airduct road 11 that is communicated with air preheater 15; One time wind-heat airduct road 11 is communicated with coal pulverizer 10; Coal pulverizer 10 is communicated with boiler body 6; Coal handling system 2 is communicated with coal pulverizer 10 by feeder 3; Be used for to coal pulverizer 10 coal supplies; Air preheater 15 is connected with primary air fan 12 and overfire air fan 13; Give wind-heat airduct road 11 and secondary wind hot air duct 7 air feeds respectively; Between the outlet of boiler body 6 and air preheater 15, denitrating system 14 is set; Air preheater 15 is communicated with deduster 16, desulphurization system 17 and chimney 18 again successively, and fluid reservoir 5 is communicated with secondary wind hot air duct 7 with a wind-heat airduct road 11 with secondary wind dosing mouth 8 by a wind dosing mouth 4 respectively.
Its method that realizes mercury pollution control is following:
Halide additive selective chlorination calcium in the fluid reservoir 5.Calcium chloride is in fluid reservoir 5; After being formulated into the homogeneous solution of 4mol/L; Add in wind-heat airduct road 11 and the secondary wind hot air duct 7 by wind dosing mouth 4 and secondary wind dosing mouth 8 respectively; Bring boiler body 6 into by wind and secondary wind and participate in burning; Promote the oxidation of the mercury in the flue gas to make the flue gas mercury content in the chimney 18 reach emission request, the ratio 40mg/Nm of calcium chloride addition and wind and secondary wind total amount
3A described wind dosing mouth 4 is arranged in wind-heat airduct road 11 one time, and its quantity is corresponding one by one with a wind-heat airduct road 11, is two; Secondary wind dosing mouth 8 is arranged in secondary wind hot air duct 7, and its quantity is corresponding one by one with secondary wind hot air duct 7, is two.Because in the normal course of operation, the air quantity of wind and secondary wind is constant basically, so the addition of calcium chloride is also constant basically, need not frequent adjustment.
In the present embodiment, demercuration efficient can reach more than 65%.
Embodiment two
As shown in Figure 2; A kind of coal-burning power plant mercury pollution control system of high efficiency, low cost; Comprise the secondary wind hot air duct 7 that is communicated with boiler body 6; Secondary wind hot air duct 7 is communicated with air preheater 15; Also comprise a wind-heat airduct road 11 that is communicated with air preheater 15; One time wind-heat airduct road 11 is communicated with coal pulverizer 10; Coal pulverizer 10 is communicated with boiler body 6; Coal handling system 2 is communicated with coal pulverizer 10 by feeder 3; Be used for to coal pulverizer 10 coal supplies; Air preheater 15 is connected with primary air fan 12 and overfire air fan 13; Give wind-heat airduct road 11 and secondary wind hot air duct 7 air feeds respectively; Between the outlet of boiler body 6 and air preheater 15, denitrating system 14 is set; Air preheater 15 is communicated with deduster 16, desulphurization system 17 and chimney 18 again successively, and fluid reservoir 5 only is communicated with a wind-heat airduct road 11 by a wind dosing mouth 4.
Its method that realizes mercury pollution control is following:
Halide additive in the fluid reservoir 5 is selected calcium bromide.Calcium bromide is in fluid reservoir 5; After being formulated into the homogeneous solution of 4mol/L; In wind-heat airduct road 11 of wind dosing mouth 4 addings; Bring boiler body 6 into by a wind and participate in burning; Promote the oxidation of the mercury in the flue gas to make the flue gas mercury content in the chimney 18 reach emission request, the ratio of a calcium bromide addition and a wind air quantity of standard is 40mg/Nm
3A described wind dosing mouth 4 is arranged in wind-heat airduct road 11 one time, and its quantity is corresponding one by one with a wind-heat airduct road 11, is two, thereby has reduced the quantity and the complexity thereof of additive injection system.After additive adds from a wind dosing mouth 4 simultaneously, will get into coal pulverizer 10, thereby realize that additive mixes participation burning then with a wind more equably.Because in the normal course of operation, the air quantity of a wind is constant basically, so the addition of calcium bromide is also constant basically, need not frequent adjustment.
In the present embodiment, demercuration efficient can reach more than 80%.
Embodiment three
As shown in Figure 3; A kind of coal-burning power plant mercury pollution control system of high efficiency, low cost; Comprise the secondary wind hot air duct 7 that is communicated with boiler body 6; Secondary wind hot air duct 7 is communicated with air preheater 15; Also comprise the secondary wind arm 21 that is communicated with air preheater 15 and secondary wind hot air duct 7; Secondary wind arm 21 is communicated with coal pulverizer 10; Coal pulverizer 10 is communicated with boiler body 6; Coal handling system 2 is communicated with coal pulverizer 10 by feeder 3; Be used for to coal pulverizer 10 coal supplies; Coal pulverizer 10 is connected with Pulverized Coal Bin 20 by coal dust classifier 19; Pulverized Coal Bin 20 is communicated with boiler body 6; Pulverized Coal Bin 20 is communicated with air preheater 15 by a wind-heat airduct road 11; Air preheater 15 is connected with primary air fan 12 and overfire air fan 13; Give wind-heat airduct road 11 and secondary wind hot air duct 7 air feeds respectively; Between the outlet of boiler body 6 and air preheater 15, denitrating system 14 is set; Air preheater 15 is communicated with deduster 16, desulphurization system 17 and chimney 18 again successively; Also comprise fluid reservoir 5; Fluid reservoir 5 is communicated with a wind-heat airduct road 11 by a wind dosing mouth 4; A described wind dosing mouth 4 is arranged in wind-heat airduct road 11 one time; Its quantity is corresponding one by one with a wind-heat airduct road 11; Be two, thereby reduced the quantity and the complexity thereof of additive injection system.
Its method that realizes mercury pollution control is following:
Halide additive in the fluid reservoir 5 is selected the mixed solution of calcium bromide and calcium chloride.In fluid reservoir 5; Calcium bromide concentration is 3mol/L; Calcium chloride concentration is 5mol/L; Then; In wind-heat airduct road 11 of wind dosing mouth 4 addings, bring boiler body 6 into by a wind and participate in burning, promote the oxidation of the mercury in the flue gas to make the flue gas mercury content in the chimney 18 reach emission request; In the present embodiment, the ratio of a calcium bromide and a wind air quantity of standard is 30mg/Nm
3, the ratio of a calcium chloride and a wind air quantity of standard is about 28mg/Nm
3Additive will get into Pulverized Coal Bin 20 after adding from a wind dosing mouth 4, thereby realize that additive mixes participation burning then with a wind more equably.Because in the normal course of operation, the air quantity of a wind is constant basically, so the addition of additive mixed solution is also constant basically, need not frequent adjustment.
In the present embodiment, demercuration efficient can reach more than 80%.
Embodiment four
As shown in Figure 4; Be with the difference of embodiment one; No out of stock system 14 between boiler body 6 and the air preheater 15; Fluid reservoir 5 only is communicated with secondary wind hot air duct 7 through secondary wind dosing mouth 8; Described secondary wind dosing mouth 8 is arranged in secondary wind hot air duct 7, and its quantity is corresponding one by one with secondary wind hot air duct 7.
Its method that realizes mercury pollution control is following:
Halide additive in the fluid reservoir 5 is selected hydrobromic acid.Hydrobromic acid is in fluid reservoir 5; Be formulated into the homogeneous solution of 2mol/L; Add in the secondary wind hot air duct 7 by secondary wind dosing mouth 8; Bring boiler body 6 into by secondary wind and participate in burning; Promote the oxidation of the mercury in the flue gas to make the flue gas mercury content in the chimney 18 reach emission request, the ratio of mixed solution addition and standard secondary wind air quantity is 50mg/Nm
3Because in the normal course of operation, the air quantity of secondary wind is constant basically, so hydrobromic addition is also constant basically, need not frequent adjustment.
In the present embodiment, demercuration efficient can reach more than 70%.
Embodiment five
As shown in Figure 5, be that with the difference of embodiment one fluid reservoir 5 is connected with feeder 3 through feeder dosing mouth 9, its quantity is corresponding one by one with the quantity of feeder 3, is 4 covers.。
Its method that realizes mercury pollution control is following:
Halide additive in the fluid reservoir 5 is selected calcium bromide.Calcium bromide is in fluid reservoir 5; Be formulated into the homogeneous solution of 4mol/L; Add in the feeder 3 by feeder dosing mouth 9; Gone into to participate in burning in the boiler body 6 by the ribbing, promote the oxidation of the mercury in the flue gas to make the flue gas mercury content in the chimney 18 reach emission request, the ratio of calcium bromide addition and coal-supplying amount is 10～500ppm; In the present embodiment; Select 100ppm, system is simple, and is easy to operate.
In the present embodiment, demercuration efficient can reach more than 80%.
Embodiment six
As shown in Figure 6, be with the difference of embodiment one that fluid reservoir 5 is connected with coal handling system 2 through defeated coal dosing mouth 1, described defeated coal dosing mouth 1 is positioned at the posterior segment of coal handling system 2, and its quantity is corresponding one by one with the quantity of coal handling system 2, is 2 and overlaps.
Its method that realizes mercury pollution control is following:
Halide additive in the fluid reservoir 5 is selected the mixture of calcium bromide and KI.In fluid reservoir 5; Calcium bromide concentration is 3mol/L, and KI concentration is 1mol/L, is added in the coal handling system 2 by defeated coal dosing mouth 1; Go into to participate in burning in the boiler body 6 by the ribbing; Promote the oxidation of the mercury in the flue gas to make the flue gas mercury content in the chimney 18 reach emission request, in the present embodiment, the ratio of calcium bromide addition and coal-supplying amount is 80ppm; The ratio of corresponding KI addition and coal-supplying amount is about 22ppm; System is simple, and is easy to operate, and equipment is less.
In the present embodiment, demercuration efficient can reach more than 75%.
Embodiment seven
As shown in Figure 7, be with the difference of embodiment three, no out of stock system 14 between boiler body 6 and the air preheater 15, fluid reservoir 5 is connected with feeder 3 through feeder dosing mouth 9, and its quantity is corresponding one by one with the quantity of feeder 3, is 6 covers.
Its method that realizes mercury pollution control is following:
Halide additive in the fluid reservoir 5 is selected the mixture of calcium bromide, calcium chloride and sodium sulphate.In fluid reservoir 5; Calcium bromide concentration is 3mol/L; Calcium chloride concentration is 2mol/L; Sodium sulfate concentration is 0.5mol/L; Add in the coal handling system 2 by defeated coal dosing mouth 1; Go into to participate in burning in the boiler body 6 by the ribbing; Promote the oxidation of the mercury in the flue gas to make the flue gas mercury content in the chimney 18 reach emission request; In the present embodiment; The ratio of calcium bromide addition and coal-supplying amount is 80ppm; The ratio that the ratio of corresponding calcium chloride addition and coal-supplying amount is about 30ppm, sodium sulphate addition and coal-supplying amount is about 9.5ppm, and system is simple, and is easy to operate.
In the present embodiment, demercuration efficient can reach more than 70%.
According to above embodiment, according to actual needs, when system has comprised coal handling system 2, feeder 3, wind-heat airduct road 11, secondary wind hot air duct 7 and secondary wind arm 21, fluid reservoir 5 can with wherein any one or a plurality of the connection.
Among the present invention, the implication of Reference numeral is following:
1, defeated coal dosing mouth, 2, coal handling system, 3, feeder, 4, wind dosing mouths; 5, fluid reservoir, 6, boiler body, 7, the secondary wind hot air duct, 8, the secondary wind dosing mouth; 9, feeder dosing mouth, 10, coal pulverizer, 11, wind-heat airduct roads, 12, primary air fan; 13, overfire air fan, 14, denitrating system, 15, air preheater; 16, deduster, 17, desulphurization system, 18, chimney; 19, coal dust classifier, 20, Pulverized Coal Bin, 21, the secondary wind arm.
Claims (10)
1. coal-burning power plant's mercury pollution of a high efficiency, low cost is controlled system; It is characterized in that; Make halide additive solution get into boiler body (6) and participate in combustion reaction; The simple substance mercury oxidation that promotes the boiler combustion reaction to generate is a divalence mercury; Thereby utilize the existing flue gas purifying equipment of boiler back end ductwork to realize effectively removing of mercury, the concentration range of said halide additive solution is 0.1～20mol/L.
2. coal-burning power plant's mercury pollution control method of high efficiency, low cost according to claim 1; It is characterized in that; Halide additive solution is directly sprayed into boiler body (6) participate in burning, halide additive is 1～1000mg/Nm with the ratio of the air capacity that gets into boiler body (6)
3
3. coal-burning power plant's mercury pollution control method of high efficiency, low cost according to claim 1; It is characterized in that; Halide additive solution is injected in the hot air duct; Bring halide additive into boiler body (6) through hot blast and participate in burning, halide additive is 1～1000mg/Nm with the ratio of the air capacity that gets into boiler body (6)
3
4. coal-burning power plant's mercury pollution control method of high efficiency, low cost according to claim 1; It is characterized in that; Halide additive is got into boiler body participate in burning after coal mixes, the ratio of halide additive addition and coal-supplying amount is 1～5000ppm.
5. coal-burning power plant's mercury pollution control method of high efficiency, low cost according to claim 1 is characterized in that, said halide additive solution replaces with comprising halid mixture solution.
6. according to coal-burning power plant's mercury pollution control method of claim 1 or 5 described high efficiency, low costs, it is characterized in that said halide is villaumite, bromine salt, salt compounded of iodine or their mixture.
7. system that realizes coal-burning power plant's mercury pollution control method of the said high efficiency, low cost of claim 1; Comprise the secondary wind hot air duct (7) that is communicated with boiler body (6); Secondary wind hot air duct (7) is communicated with air preheater (15); Air preheater (15) also is communicated with a wind-heat airduct road (11); A wind-heat airduct road (11) is communicated with coal pulverizer (10); Coal pulverizer (10) is communicated with boiler body (6); It is characterized in that; System also comprises fluid reservoir (5); In fluid reservoir (5) and a wind-heat airduct road (11) and the secondary wind hot air duct (7) at least one is connected, and fluid reservoir has halide additive solution in (5).
8. system that realizes coal-burning power plant's mercury pollution control method of the said high efficiency, low cost of claim 1; Comprise a wind-heat airduct road (11) that is communicated with air preheater (15); A wind-heat airduct road (11) is communicated with coal pulverizer (10); Coal pulverizer (10) is communicated with boiler body (6); Coal handling system (2) is communicated with coal pulverizer (10) through feeder (3); It is characterized in that; System also comprises fluid reservoir (5); Fluid reservoir (5) is communicated with coal handling system (2) or feeder (3), and fluid reservoir has halide additive solution in (5).
9. system that realizes coal-burning power plant's mercury pollution control method of the said high efficiency, low cost of claim 1; Comprise the secondary wind hot air duct (7) that is communicated with boiler body (6); Secondary wind hot air duct (7) also is communicated with secondary wind arm (21) and air preheater (15); Secondary wind arm (21) is communicated with coal pulverizer (10); Coal pulverizer (10) is connected with Pulverized Coal Bin (20) through coal dust classifier (19); Pulverized Coal Bin (20) is communicated with boiler body (6); Pulverized Coal Bin (20) is communicated with air preheater (15) through a wind-heat airduct road (11); Coal handling system (2) is communicated with coal pulverizer (10) through feeder (3); It is characterized in that; System also comprises fluid reservoir (5); Fluid reservoir (5) and coal handling system (2); Feeder (3); A wind-heat airduct road (11); In the secondary wind hot air duct (7) at least one is connected, and fluid reservoir has halide additive solution in (5).
10. control system according to coal-burning power plant's mercury pollution of claim 7 or 8 or 9 described high efficiency, low costs; It is characterized in that; Between the outlet of boiler body (6) and air preheater (15), denitrating system (14) is set, air preheater (15) is communicated with deduster (16), desulphurization system (17) and chimney (18) again successively.
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| CN102989282A (en) * | 2012-11-30 | 2013-03-27 | 东方电气集团东方锅炉股份有限公司 | Method and device for collaborative removal of mercury in flue gas |
| CN102989305A (en) * | 2012-11-23 | 2013-03-27 | 中国华能集团清洁能源技术研究院有限公司 | Method suitable for controlling mercury contamination in coal-fired power plants adopting wet-process flue gas desulfurization |
| CN103831000A (en) * | 2013-12-12 | 2014-06-04 | 大唐科技产业有限公司 | Collaborative oxidation demercuration device and demercuration method for coal-fired flue gas |
| CN104399360A (en) * | 2014-11-14 | 2015-03-11 | 华能国际电力股份有限公司 | NOx and mercury combined removal process and device based on combination of SNCR-SCR |
| CN105268300A (en) * | 2015-11-11 | 2016-01-27 | 中国华能集团公司 | Joint mercury removing method and device based on SNCR |
| CN110302633A (en) * | 2019-07-26 | 2019-10-08 | 中国华能集团清洁能源技术研究院有限公司 | A kind of stationary source gas mercury concentration monitor activated carbon adsorption pipe and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1933894A (en) * | 2004-03-22 | 2007-03-21 | 巴布考克及威尔考克斯公司 | Bromine addition for the improved removal of mercury from flue gas |
| CN101133141A (en) * | 2005-02-24 | 2008-02-27 | 巴布考克及威尔考克斯公司 | Method of applying mercury reagent with coal |
| CN101175948A (en) * | 2005-03-17 | 2008-05-07 | Noxⅱ国际有限公司 | Reducing mercury emissions from the burning of coal |
| WO2009005525A1 (en) * | 2007-07-03 | 2009-01-08 | Albemarle Corporation | Use of compounds containing halogen and nitrogen for reducing mercury emissions during coal combustion |
| CN201811226U (en) * | 2010-09-30 | 2011-04-27 | 河北理工大学 | Gas and air device of condensation type circulating fluidized-bed boiler |
-
2011
- 2011-09-21 CN CN2011102822929A patent/CN102343200A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1933894A (en) * | 2004-03-22 | 2007-03-21 | 巴布考克及威尔考克斯公司 | Bromine addition for the improved removal of mercury from flue gas |
| CN101133141A (en) * | 2005-02-24 | 2008-02-27 | 巴布考克及威尔考克斯公司 | Method of applying mercury reagent with coal |
| CN101175948A (en) * | 2005-03-17 | 2008-05-07 | Noxⅱ国际有限公司 | Reducing mercury emissions from the burning of coal |
| WO2009005525A1 (en) * | 2007-07-03 | 2009-01-08 | Albemarle Corporation | Use of compounds containing halogen and nitrogen for reducing mercury emissions during coal combustion |
| CN201811226U (en) * | 2010-09-30 | 2011-04-27 | 河北理工大学 | Gas and air device of condensation type circulating fluidized-bed boiler |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588979A (en) * | 2012-03-09 | 2012-07-18 | 华北电力大学（保定） | Method for promoting generation of particle mercury during mixed combustion of waste printed circuit boards in coal-fired boiler and system |
| CN102588979B (en) * | 2012-03-09 | 2014-05-14 | 华北电力大学（保定） | Method for promoting generation of particle mercury during mixed combustion of waste printed circuit boards in coal-fired boiler and system |
| CN102989305A (en) * | 2012-11-23 | 2013-03-27 | 中国华能集团清洁能源技术研究院有限公司 | Method suitable for controlling mercury contamination in coal-fired power plants adopting wet-process flue gas desulfurization |
| CN102989282A (en) * | 2012-11-30 | 2013-03-27 | 东方电气集团东方锅炉股份有限公司 | Method and device for collaborative removal of mercury in flue gas |
| CN103831000A (en) * | 2013-12-12 | 2014-06-04 | 大唐科技产业有限公司 | Collaborative oxidation demercuration device and demercuration method for coal-fired flue gas |
| CN103831000B (en) * | 2013-12-12 | 2016-04-27 | 大唐环境产业集团股份有限公司 | A kind of coal-fired flue-gas synergistic oxidation mercury removal device and demercuration method |
| CN104399360A (en) * | 2014-11-14 | 2015-03-11 | 华能国际电力股份有限公司 | NOx and mercury combined removal process and device based on combination of SNCR-SCR |
| CN105268300A (en) * | 2015-11-11 | 2016-01-27 | 中国华能集团公司 | Joint mercury removing method and device based on SNCR |
| CN105268300B (en) * | 2015-11-11 | 2017-11-14 | 中国华能集团公司 | A kind of joint demercuration method and device based on SNCR |
| CN110302633A (en) * | 2019-07-26 | 2019-10-08 | 中国华能集团清洁能源技术研究院有限公司 | A kind of stationary source gas mercury concentration monitor activated carbon adsorption pipe and preparation method thereof |
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