CN103203161A - Flue gas combined desulfurization denitration demercuration device and method - Google Patents
Flue gas combined desulfurization denitration demercuration device and method Download PDFInfo
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- CN103203161A CN103203161A CN201310063999XA CN201310063999A CN103203161A CN 103203161 A CN103203161 A CN 103203161A CN 201310063999X A CN201310063999X A CN 201310063999XA CN 201310063999 A CN201310063999 A CN 201310063999A CN 103203161 A CN103203161 A CN 103203161A
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 138
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 80
- 239000003546 flue gas Substances 0.000 title claims abstract description 80
- 230000023556 desulfurization Effects 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000000571 coke Substances 0.000 claims abstract description 78
- 230000008929 regeneration Effects 0.000 claims abstract description 26
- 238000011069 regeneration method Methods 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 14
- 230000000694 effects Effects 0.000 claims description 59
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 41
- 229910052753 mercury Inorganic materials 0.000 claims description 41
- 239000000779 smoke Substances 0.000 claims description 14
- 238000012216 screening Methods 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 4
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000003245 coal Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000003317 industrial substance Substances 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
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Abstract
The invention discloses a combined desulfurization denitration demercuration device and a method thereof. The device comprises a desulphurization demercuration reactor and a denitration demercuration reactor; a flue gas inlet is arranged on a side wall of the desulfurization demercuration reactor; a side wall opposite to the one provided with the flue gas inlet of the desulfurization demercuration reactor is connected to a gas collection chamber a through a sieve plate; the top of the desulfurization demercuration reactor is provided with an activated coke inlet of the desulfurization demercuration reactor, and the bottom of the desulfurization demercuration reactor is provided with an activated coke outlet of the desulfurization demercuration reactor; a flue gas outlet is arranged on a sidewall of the denitration demercuration reactor; the top of the desulfurization demercuration reactor is provided with an activated coke inlet of the desulfurization demercuration reactor, and the bottom of the desulfurization demercuration reactor is provided with an activated coke outlet of the desulfurization demercuration reactor; the activated coke inlet of the denitration demercuration reactor and the outlet of the desulfurization demercuration reactor communicate with each other; and the activated coke outlet of the desulfurization demercuration reactor communicates with a regeneration reactor. The flue gas combined desulfurization denitrification demercuration method employs the flue gas combined desulfurization denitrification demercuration device provided by the invention to improve the desulfurization efficiency, denitration efficiency and demercuration efficiency and recycle SO2 gas.
Description
Technical field
The present invention relates to a kind of smoke eliminator and method thereof, be specifically related to a kind of flue gas combined desulfurization and denitration mercury removal device and method thereof.
Background technology
SO in the coal-fired flue-gas
2And NO
xEnvironmental pollutions such as caused acid rain and photochemical fog have become the serious problems that influence environment for human survival, and the pollution of heavy metal Hg control also brings into schedule day by day, along with the raising of environmental requirement in recent years, control SO simultaneously
2, NO
xMore urgent with the requirement of mercury emissions.The desulfurization traditional with respect to independent application, denitration and removal of mercury technology, combined desulfurization and denitration demercuration technology has advantage aspect economy, the level of resources utilization, China's pollution that caused by coal burning is on the rise, greatly develop low expense, high efficiency pollution that caused by coal burning Prevention Technique is the task of top priority, the combined desulfurization and denitration demercuration technology that therefore has advantages such as expense is low, compact conformation is subjected to increasing attention.
Activated coke flue gas combined desulfurization and denitration demercuration technology is a kind of advanced person's dry method flue gas combined desulfurization and denitration demercuration technology, and this technology desulfurization denitration demercuration efficient height, subtractive process be consume water not substantially, is adapted at China water-deficient area and applies; But remove the product resource, can alleviate the present situation of present China sulphur shortage of resources to a certain extent; The coal-based adsorbent that adopts is primary raw material with the relative abundant in coal of China's reserves, and raw material supply has sufficient the assurance.Therefore, this technology is that a kind of suitable China's national situation, efficient and economic coal-fired flue-gas pollute and jointly control technology.
The active coke desulphurizing technological principle is based on SO
2Absorption and catalytic action on the activated coke surface, the SO in the flue gas
2Under 110～180 ℃ temperature, generate sulfuric acid and be adsorbed in the activated coke hole with the chemical reaction that reacts of oxygen, water vapour in the flue gas, reaction equation is as follows:
2SO
2+O
2+2H
2O→2H
2SO
4
Activated coke denitrating technique principle is to utilize the catalysis characteristics of activated coke, adopts low-temperature selective catalytic reduction reaction (SCR) method, allocates small amount of N H in flue gas into
3, impel NO that selective catalytic reduction reaction takes place and generate harmless N
2Directly discharging, reaction equation is as follows:
4NO+4NH
3+O
2→4N
2+6H
2O
The activated coke demercuration is to utilize the functional group on activated coke surface and pore structure thereof that mercury is adsorbed in the hole of activated coke.
Because the SO of the concentration of mercury in the flue gas in the flue gas
2Or NO
XConcentration is lower, and the adsorbing and removing of mercury is to SO
2With NO
xThe basic not influence of absorption on activated coke or reaction, so mercury can be removed when active coke desulphurizing, also can be removed when the activated coke denitration; But need to spray into ammonia in the activated coke denitrification process, if SO is arranged
2Exist and to produce certain adverse effect to denitration, so active coke desulphurizing should separate with denitration and carries out.
Absorption SO
2After activated coke be heated when regeneration, discharge SO
2, can recover desulphurizing activated, what discharge in the activated coke thermal regeneration process is rich in SO
2(V/V:20%-40%) gas can be used as industrial chemicals and recycles, and its processing technology is all very ripe, can produce the multiple commercial grades that contains element sulphur according to the market demand, as sulfuric acid, elemental sulfur, chemical fertilizer, liquid SO
2Or other Containing Sulfur chemical product etc., environment is not caused secondary pollution.
Summary of the invention
An object of the present invention is to provide a kind of flue gas combined desulfurization and denitration mercury removal device.
Another object of the present invention provides a kind of method of utilizing said apparatus to carry out the combined desulfurization and denitration demercuration.
A kind of flue gas combined desulfurization and denitration mercury removal device provided by the present invention comprises desulfuration demercuration reactor and denitration demercuration reactor; The sidewall of described desulfuration demercuration reactor is provided with smoke inlet, and the sidewall of the described desulfuration demercuration reactor relative with smoke inlet is set is connected with collection chamber a by sieve plate, is provided with spray NH in the described collection chamber a
3Device, the top of described desulfuration demercuration reactor are provided with the burnt entrance of desulfuration demercuration reactor activity, and its bottom is provided with the burnt outlet of desulfuration demercuration reactor activity; The sidewall of described denitration demercuration reactor is provided with exhanst gas outlet, and a sidewall of described denitration demercuration reactor is connected with collection chamber b by sieve plate, and described collection chamber a is connected with described collection chamber b; The top of described denitration demercuration reactor is provided with the burnt entrance of denitration demercuration reactor activity, and its bottom is provided with the burnt outlet of denitration demercuration reactor activity; The burnt outlet of described denitration demercuration reactor activity is connected with the burnt entrance of described desulfuration demercuration reactor activity, the burnt outlet of described desulfuration demercuration reactor activity is connected with regeneration reactor, and the outlet of described regeneration reactor is connected with the burnt entrance of described desulfuration demercuration reactor activity and the burnt entrance of denitration demercuration reactor activity respectively.
Above-mentioned flue gas combined desulfurization and denitration mercury removal device, described smoke inlet is located at the middle part of described desulfuration demercuration reactor; Described exhanst gas outlet is located at the place, top of nearly described denitration demercuration reactor.
Above-mentioned flue gas combined desulfurization and denitration mercury removal device, described regeneration reactor is connected with screening plant, and the outlet of the qualified particle diameter of described screening plant is connected with the burnt entrance of described desulfuration demercuration reactor activity and the burnt entrance of denitration demercuration reactor activity respectively.
The method of a kind of flue gas desulfurization and denitrification demercuration provided by the invention comprises the steps: to utilize above-mentioned flue gas combined desulfurization and denitration mercury removal device that flue gas to be clean is carried out desulfurization denitration demercuration, obtains the flue gas of allow compliance with emission standards; When described flue gas to be clean entered described desulfuration demercuration reactor and denitration demercuration reactor and purifies, circulation added activated coke in described desulfuration demercuration reactor and the denitration demercuration reactor.
In the above-mentioned method, the purification route of flue gas to be clean is: flue gas to be clean enters in the described desulfuration demercuration reactor from described smoke inlet, contacts with activated coke in the described desulfuration demercuration reactor; Described flue gas enters in the described collection chamber a then, with described spray NH
3The NH of device ejection
3Enter after the premixed in the described collection chamber b, and then enter in the described denitration demercuration reactor; Activated coke in described flue gas and the described denitration demercuration reactor contact, reaches the flue gas of allow compliance with emission standards then from described exhanst gas outlet discharge;
The circulation route of described activated coke is: back activated coke and the fresh activated coke of part of regenerating enters in described desulfuration demercuration reactor and the denitration demercuration reactor from the burnt entrance of desulfuration demercuration reactor activity and the burnt entrance of denitration demercuration reactor activity respectively, and described activated coke dependence gravity moves and remove the NO in the flue gas from top to bottom in described denitration demercuration reactor
xAnd mercury, export out by the burnt entrance of described desulfuration demercuration reactor activity from described denitration demercuration reactor activity Jiao then and enter in the described desulfuration demercuration reactor; Described activated coke relies on gravity SO in the mobile and absorption flue gas from top to bottom in described desulfuration demercuration reactor
2And mercury; After exporting out, described desulfuration demercuration reactor activity Jiao enters the regeneration of carrying out activated coke in the described regeneration reactor then; Activated coke after the regeneration and the fresh activated coke of replenishing enter in described denitration demercuration reactor and the desulfuration demercuration reactor from the burnt entrance of described denitration demercuration reactor activity and the burnt entrance of desulfuration demercuration reactor activity respectively, begin new circulation.
In the above-mentioned method, the temperature of described flue gas can be 110 ℃ ~ 180 ℃.
In the said method, it is the activated coke that raw material is produced that described activated coke can be with one or more of anthracite, bituminous coal or brown coal.
In the said method, the move down speed of described activated coke in described denitration demercuration reactor can be according to NO
xConcentration is adjusted, specifically can be adjusted to the speed that moves down in described desulfuration demercuration reactor 1/10 ~ 1 between.
Flue gas combined desulfurization and denitration mercury removal device provided by the invention has following advantage:
(1) because denitration is that activated coke is used as catalyst, and the concentration of mercury is lower in the flue gas, and it is saturated can not reach absorption for a long time; And flue gas is denitration demercuration behind the first desulfuration demercuration, so the activated coke in the denitration demercuration reactor can be subjected to small amount of residual SO
2Influence, therefore comprehensive these two reasons are considered, it is slow than the desulfuration demercuration reactor to make in the denitration demercuration reactor activated coke move down speed, can guarantee that like this activated coke can keep comparatively stable denitration efficiency, also greatly reduce the regeneration cycle of activated coke in the denitration demercuration reactor, saved lot of energy, and because the speed that moves down has also reduced the friction between the activated coke slowly, reduce the activated coke fragmentation, promoted the service life of activated coke greatly.
(2) owing to the activated coke of coming out from the denitration demercuration reactor has only been adsorbed a spot of SO
2Be far from reaching capacity, therefore can return desulfuration demercuration reactor recycling and continue desulfuration demercuration, will not send into regeneration reactor from the activated coke that the denitration demercuration reactor comes out, can save the heat energy that activated coke regeneration needs greatly, also reduce the load of regenerative system simultaneously.
(3) agent structure of desulfuration demercuration reactor and denitration demercuration reactor is simple, processing easily, and flue gas and activated coke are the cross-flow form, air resistance is less, is conducive to the raising of desulfurization denitration demercuration efficient; Desulfuration demercuration reactor and denitration demercuration inside reactor are simple in structure, can reduce the activated coke friction, reduce the crushing of activated coke, and can make flue gas and activated coke full contact, are conducive to the raising of desulfurization denitration demercuration efficient.
(4) mercury in the flue gas is together removed desulfurization the time, the mercury that is not removed can remove by secondary in denitration, has improved the removal efficiency of mercury greatly; And this technology need not join a demercuration system separately again, than the industrial independent mercury removal device that uses, saved expenses of environmental protection greatly, also saved the occupation of land of device, improved economic benefit of enterprises.
(5) flue gas that comes out of desulfuration demercuration reactor, residual a small amount of SO
2, can in the denitration demercuration reactor, remove by secondary, realized smart desulfurization, promoted SO greatly
2Removal efficiency greatly reduces the SO that flue gas enters atmosphere
2Concentration can effectively be controlled SO
2Total emission volumn.
(6) technology pollutant removing efficient height, SO
2Removal efficiency 〉=95%, NO
xRemoval efficiency 〉=70%, mercury removal efficient 〉=70%.
The method of a kind of flue gas combined desulfurization and denitration demercuration provided by the invention because this method is utilized flue gas combined desulfurization and denitration mercury removal device provided by the invention, has improved desulfurization, denitration and demercuration efficient simultaneously, and can be to SO
2Gas is recycled.
Description of drawings
Fig. 1 is the structural representation of flue gas combined desulfurization and denitration mercury removal device provided by the invention.
Fig. 2 is the structural representation of the desulfuration demercuration reactor of flue gas combined desulfurization and denitration mercury removal device provided by the invention.
Fig. 3 is the structural representation of the denitration demercuration reactor of flue gas combined desulfurization and denitration mercury removal device provided by the invention.
Fig. 4 is the desulfuration demercuration reactor of flue gas combined desulfurization and denitration mercury removal device provided by the invention and the flow direction schematic diagram of the interior activated coke of denitration demercuration reactor and flue gas.
The specific embodiment
Employed experimental technique is conventional method if no special instructions among the following embodiment.
Used material, reagent etc. if no special instructions, all can obtain from commercial channels among the following embodiment.
The used activated coke of the following embodiment of the present invention is bought the emerging charcoal industry Co., Ltd in section.
SO in the flue gas among the following embodiment of the present invention
2SO with the production of NO employing Beijing BAIF-Maihak Analytical Instrument Co., Ltd.
2With the NO infrared analyzer, model is QGS-08B.Flue gas after the desulfurization denitration demercuration is introduced analytical instrument respectively, and analytical instrument is measured SO in the flue gas automatically
2With NO concentration, then signal is passed to computer data are preserved.The mercury analyzer device adopts the RA-915M mercury analyzer of Russian Lumex company.Concentration behind mensuration flue gas pollutant initial concentration and the desulfurization denitration demercuration can obtain removal efficiency by calculating.
Flue gas combined desulfurization and denitration mercury removal device provided by the invention, its structure as shown in Figure 1, desulfuration demercuration reactor wherein and the structural representation of denitration demercuration reactor respectively are labeled as among the figure respectively as shown in Figures 2 and 3: I denitration demercuration reactor, II desulfuration demercuration reactor, the burnt entrance of 1 denitration demercuration reactor activity, the burnt entrance of 2 desulfuration demercuration reactor activity, the burnt outlet of 3 denitration demercuration reactor activity, the burnt outlet of 4 desulfuration demercuration reactor activity, 5 regeneration reactors, 6 screening plants, 7 smoke inlets, 8 exhanst gas outlets, 9 collection chamber a, 10 collection chamber b.
This device comprises desulfuration demercuration reactor II and denitration demercuration reactor I, the center of the sidewall of desulfuration demercuration reactor II is provided with smoke inlet 7, the sidewall of the desulfuration demercuration reactor II relative with smoke inlet 7 is connected with collection chamber a9 by sieve plate, is provided with spray NH in the collection chamber a9
3Device, the top of desulfuration demercuration reactor II are provided with the burnt entrance 2 of desulfuration demercuration reactor activity, and its bottom is provided with the burnt outlet 4 of desulfuration demercuration reactor activity; Nearly its place, top is provided with exhanst gas outlet 8 on the sidewall of denitration demercuration reactor I, and a sidewall of this denitration demercuration reactor I is connected with collection chamber b10 by sieve plate, and collection chamber a9 and collection chamber b10 are connected; The top of denitration demercuration reactor I is provided with the burnt entrance 1 of denitration demercuration reactor activity, and its bottom is provided with the burnt outlet 3 of denitration demercuration reactor activity; The burnt outlet 3 of denitration demercuration reactor activity is connected with the burnt entrance 2 of desulfuration demercuration reactor activity, the burnt outlet of desulfuration demercuration reactor activity 4 is connected with regeneration reactor 5, the outlet of regeneration reactor 5 is connected with screening plant 6, the outlet of the qualified particle diameter of screening plant 6 is connected with the burnt entrance 2 of desulfuration demercuration reactor activity and the burnt entrance 1 of denitration demercuration reactor activity respectively, obtain the activated coke of release mesh through the outlet of the qualified particle diameter of screening plant 6 through the activated coke of regeneration, activated coke after the regeneration and the fresh activated coke of replenishing enter into respectively in denitration demercuration reactor I and the desulfuration demercuration reactor II by the burnt entrance 1 of denitration demercuration reactor activity and the burnt entrance 2 of desulfuration demercuration reactor activity, enter next circulation.
The inside activated coke of the desulfuration demercuration reactor II of this device and denitration demercuration reactor I and the flow direction schematic diagram of flue gas as shown in Figure 4, flue gas to be clean enters among the collection chamber a in smoke inlet enters to desulfuration demercuration reactor II then, with the spray NH
3The NH of device ejection
3Enter to after the mixing among the collection chamber b, enter then in the denitration demercuration reactor I, discharge by exhanst gas outlet at last; Activated coke is all mobile from top to bottom by gravity in desulfuration demercuration reactor II and denitration demercuration reactor I, contacts with flue gas in moving process.
Carry out desulfurization, denitration and demercuration with the above-mentioned flue gas combined desulfurization and denitration mercury removal device that provides, detailed process is: will just adorn activated coke 500t and join denitration demercuration reactor I and the desulfuration demercuration reactor II from the burnt entrance 1 of denitration demercuration reactor activity and the burnt entrance 2 of desulfuration demercuration reactor activity respectively; Activated coke dependence gravity moves and removes the NO in the flue gas from top to bottom in denitration demercuration reactor I
xAnd mercury, come out to enter in the desulfuration demercuration reactor II by the burnt entrance 2 of desulfuration demercuration reactor activity from the burnt outlet 3 of denitration demercuration reactor activity then; Activated coke relies on gravity SO in the mobile and absorption flue gas from top to bottom in desulfuration demercuration reactor II
2And mercury; After coming out, the burnt outlet 4 of desulfuration demercuration reactor activity enters the regeneration of carrying out activated coke in the regeneration reactor 5 then; Activated coke after the regeneration and the fresh activated coke of replenishing enter in denitration demercuration reactor I and the desulfuration demercuration reactor II from the burnt entrance 1 of denitration demercuration reactor activity and the burnt entrance 2 of desulfuration demercuration reactor activity respectively, begin new circulation; With flue gas (SO to be clean
2Concentration is 3000mg/Nm
3, NO
xConcentration is 400mg/Nm
3, the concentration 20 μ g/Nm of mercury
3, the temperature of flue gas is 120 ℃) and from being added to the desulfuration demercuration reactor II of this device, smoke inlet 7 contacts with activated coke, to remove the SO in the flue gas
2And mercury, the control flue gas flow rate is 80000Nm
3/ h; Then flue gas is introduced behind the collection chamber a9 and spray NH
3The NH of device ejection
3Enter after the premixed in the collection chamber b10, enter then and contact with activated coke in the denitration demercuration reactor I, to remove the NO in the flue gas
xAnd mercury, and further smart desulfurization; Discharge the flue gas that reaches allow compliance with emission standards from exhanst gas outlet 8 then.Whole process SO
2Removal efficiency is 98%, NO
xRemoval efficiency is 75%, and the removal efficiency of mercury is 80%.
Claims (6)
1. a combined desulfurization and denitration mercury removal device comprises desulfuration demercuration reactor and denitration demercuration reactor; It is characterized in that: the sidewall of described desulfuration demercuration reactor is provided with smoke inlet, and the sidewall of the described desulfuration demercuration reactor relative with smoke inlet is set is connected with collection chamber a by sieve plate, is provided with spray NH in the described collection chamber a
3Device, the top of described desulfuration demercuration reactor are provided with the burnt entrance of desulfuration demercuration reactor activity, and its bottom is provided with the burnt outlet of desulfuration demercuration reactor activity; The sidewall of described denitration demercuration reactor is provided with exhanst gas outlet, and a sidewall of described denitration demercuration reactor is connected with collection chamber b by sieve plate, and described collection chamber a is connected with described collection chamber b; The top of described denitration demercuration reactor is provided with the burnt entrance of denitration demercuration reactor activity, and its bottom is provided with the burnt outlet of denitration demercuration reactor activity; The burnt outlet of described denitration demercuration reactor activity is connected with the burnt entrance of described desulfuration demercuration reactor activity, the burnt outlet of described desulfuration demercuration reactor activity is connected with regeneration reactor, and the outlet of described regeneration reactor is connected with the burnt entrance of described desulfuration demercuration reactor activity and the burnt entrance of denitration demercuration reactor activity respectively.
2. device according to claim 1, it is characterized in that: described smoke inlet is located at the middle part of described desulfuration demercuration reactor; Described exhanst gas outlet is located at the place, top of nearly described denitration demercuration reactor.
3. device according to claim 1 and 2, it is characterized in that: described regeneration reactor is connected with screening plant, and the outlet of the qualified particle diameter of described screening plant is connected with the burnt entrance of described desulfuration demercuration reactor activity and the burnt entrance of denitration demercuration reactor activity respectively.
4. the method for a flue gas desulfurization and denitrification demercuration comprises the steps: to utilize that arbitrary described flue gas combined desulfurization and denitration mercury removal device carries out desulfurization denitration demercuration to flue gas to be clean among the claim 1-3, obtains the flue gas of allow compliance with emission standards; When described flue gas to be clean entered described desulfuration demercuration reactor and denitration demercuration reactor and purifies, circulation added activated coke in described desulfuration demercuration reactor and the denitration demercuration reactor.
5. method according to claim 4, it is characterized in that: the purification route of flue gas to be clean is: flue gas to be clean enters in the described desulfuration demercuration reactor from described smoke inlet, contacts with activated coke in the described desulfuration demercuration reactor; Described flue gas enters in the described collection chamber a then, with described spray NH
3The NH of device ejection
3Enter after the premixed in the described collection chamber b, and then enter in the described denitration demercuration reactor; Activated coke in described flue gas and the described denitration demercuration reactor contact, reaches the flue gas of allow compliance with emission standards then from described exhanst gas outlet discharge;
The circulation route of described activated coke is: back activated coke and the fresh activated coke of part of regenerating enters in described desulfuration demercuration reactor and the denitration demercuration reactor from the burnt entrance of desulfuration demercuration reactor activity and the burnt entrance of denitration demercuration reactor activity respectively, and described activated coke dependence gravity moves and remove the NO in the flue gas from top to bottom in described denitration demercuration reactor
xAnd mercury, export out by the burnt entrance of described desulfuration demercuration reactor activity from described denitration demercuration reactor activity Jiao then and enter in the described desulfuration demercuration reactor; Described activated coke relies on gravity SO in the mobile and absorption flue gas from top to bottom in described desulfuration demercuration reactor
2And mercury; After exporting out, described desulfuration demercuration reactor activity Jiao enters the regeneration of carrying out activated coke in the described regeneration reactor then; Activated coke after the regeneration and the fresh activated coke of replenishing enter in described denitration demercuration reactor and the desulfuration demercuration reactor from the burnt entrance of described denitration demercuration reactor activity and the burnt entrance of desulfuration demercuration reactor activity respectively, begin new circulation.
6. according to claim 4 or 5 described methods, it is characterized in that: the temperature of described flue gas is 110 ℃ ~ 180 ℃.
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| CN112403189A (en) * | 2020-02-28 | 2021-02-26 | 中冶长天国际工程有限责任公司 | Flue gas desulfurization and denitrification activated carbon distribution system and distribution method |
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