CN204042942U - A kind of device utilizing coupling technique to realize boiler smoke qualified discharge - Google Patents
A kind of device utilizing coupling technique to realize boiler smoke qualified discharge Download PDFInfo
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- CN204042942U CN204042942U CN201420407449.5U CN201420407449U CN204042942U CN 204042942 U CN204042942 U CN 204042942U CN 201420407449 U CN201420407449 U CN 201420407449U CN 204042942 U CN204042942 U CN 204042942U
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Abstract
The utility model discloses a kind of device utilizing coupling technique to realize boiler smoke qualified discharge, comprise electrostatic synergy deduster, described electrostatic synergy deduster is connected with air-introduced machine by flue I, the other end of described air-introduced machine is connected with the import of desulfurizing tower by flue II, and the outlet of described desulfurizing tower is connected with chimney by flue III; Be laid with mixing arrangement in described flue I, ozone generating-device is connected with mixing arrangement by ozone feed-line, and technique water tank is connected with electrostatic synergy electric cleaner, ozone generating-device respectively by waterline.The utility model is by carrying out local flow improvement, increasing the measures such as ozone generating-device to existing electrostatic precipitator, successfully achieve the coupling of three kinds of technology such as electrostatic synergy dedusting, ozone oxidation, wet absorption, technology is implemented need not the unit such as newly-built oxidation reactor, absorption tower, therefore there is reduced investment, floor space is little, the advantages such as retrofit work amount is little, operating cost is low.
Description
Technical field
The utility model relates to a kind of device utilizing coupling technique to realize boiler smoke qualified discharge, belongs to flue gases purification field.
Background technology
From 1 day July in 2014, existing thermal power generation boiler starts flue dust, sulfur dioxide, nitrogen oxide and the flue gas blackness emission limit that execution " fossil-fuel power plant atmospheric pollutant emission standard " (GB13223-2011) table 1 specifies, and from 1 day January in 2015, the mercury and mercuric compounds of coal-fired electric generation furnace discharge there has also been emission limit.Meanwhile, new " emission standard of air pollutants for boilers " (GB13271-2014) came into effect from 1 day July in 2014, and standard has had stricter emission request to the atmosphere pollution such as particle, sulfur dioxide, nitrogen oxide, mercury and mercuric compounds that is newly-built and active boiler discharge.
Along with the appearance successively of new discharge standard, " 12 " period, active service thermal power generation boiler and other coal-burning boiler carry out desulphurization and denitration, dedusting and demercuration technological transformation by there being the unit of more than 80% to face.At present, domestic for SO in coal-fired flue-gas
2, NO
x, the pollutant such as particle effective control generally adopt the method removed respectively by setting up distinct device.Such as SO
2remove and mainly adopt Gypsum Wet; NO
xremove and main adopt low NO
xcombustion technology and gas denitrifying technology; Particle mainly adopts the dedusting of many E field electrostatic or the efficient method such as bag-type dusting or electric bag dedusting;
The difficult problem such as equipment superposition, place restriction, system complex, investment be huge that adopts the independent removal methods of this " one to one " often to face.So the associating removing sulfuldioxide of multiple pollutant arises at the historic moment.
Existing boiler smoke is combined the method removed and is mainly divided into wet method, dry method, semidry method three kinds.The technology that typically represents is: (1) wet method combined removal methods: CN102091517A proposes absorbing liquid of integrated desulphurization and denitration, demercuration simultaneously and its preparation method and application, its technical scheme utilizes existing wet desulphurization facility, by the improvement to existing alkaline desulfurization absorbing liquid, the blend absorbent of nitrogenous reducing agent+additive is adopted to wash the SO removed in flue gas
2, NO
xand Hg.The method Problems existing is that implementation process needs will carry out larger transformation to the pulping system of existing desulfurization equipment, and operating cost significantly increases.(2) dry method associating removal methods: CN102500226A proposes a kind of dry type flue gas desulfurizing denitration demercuration integrated apparatus and method, its technical scheme adds absorbent, oxidisability additive, circulating ash in digestion humidifier, formed containing wet combination ash, combination ash sprays into reaction tower, with SO in flue gas in tower
2, NO
xwith substance reactions such as Hg, flue gas is purified.The method belongs to gas-liquid, gas and solid heterogeneous reaction, exist haptoreaction efficiency not high, need the problems such as newly-increased complicated spraying system.(3) semidry method associating removal methods: CN103566725A propose a kind of circulating fluid bed semi-drying method combined desulfurization and denitration mercury removal device and method, its technical scheme for spray into ozone by ozone distributor in flue, NO and Hg in flue gas
0high-valence state NO is oxidized in flue
xand Hg
2+, the flue gas after oxidation sends into recirculating fluidized bed reaction tower, the SO in flue gas
2, high-valence state NO
xand Hg
2+in reaction tower, under the effect of atomized water, carry out reaction remove with Ca base absorbant.This kind of method Problems existing needs newly-built circulating fluid bed reactor and auxiliary facility thereof, and system is more complicated.
In addition, CN1923341A discloses a kind of coal-burning boiler fume ozone oxidation and simultaneous desulfurization denitrification apparatus and method thereof, its technical scheme is that the low-temperature zone before or after electrostatic precipitator sprays into ozone, and lower valency nitrogen oxides water-fast in boiler smoke is become high-valence state NO soluble in water
x, SO
2be oxidized to SO
3, and then send in alkali liquid washing tower flue gas is washed, absorb the NO of high-valence state in flue gas
xand SO
x, realize simultaneous SO_2 and NO removal.This kind of method Problems existing does not consider ozone and NO, SO
2reaction rate difference.Research proves, SO
2with 3.5 times that ozone reaction activation energy is NO and ozone, the reaction rate constant at 150 DEG C be the latter 100,000/, i.e. ozone selective oxidation NO.So the enforcement of the technical program certainly will cause oxidation unit inefficiency, consume a large amount of ozone, system energy consumption increases, and also considerably increases the acid corrosion risk of oxidation unit subsequent pipeline and equipment simultaneously.
Known technology surface, SO
4 2-with SO
2compare environment and there is larger harmfulness, and be produce the immediate cause of acid corrosion, again SO in flue gas in addition
2the rate-limiting step of ozone oxidation reaction compared with NO, so ozone and SO should be avoided at ozone oxidation unit as far as possible
2react.
In a word, above-mentioned technology implements still there is the problems such as modernization system complexity, high, the newly-increased occupation of land of improvement expenses and energy consumption are large.For build desulfurization or denitrification apparatus and normal operation, pollutant emission close to or reach current standard active boiler unit for the difficulty implemented of technology more outstanding.Therefore, develop one and can make full use of existing boiler controller system environmental protecting device, under the principle not increasing large investment, large equipment, to reuse transformation to existing boiler controller system environmental protecting device, the technique and the method that finally realize pollutant discharge in compliance with the standard need in a hurry.
Summary of the invention
The purpose of this utility model is the boiler controller system for building electrostatic precipitator and wet desulphurization or semidry process desulfurizer, provides a kind of device utilizing coupling technique to realize boiler smoke qualified discharge.Boiler flue gas desulfurization, denitration, demercuration can be realized, remove combining of dedusting.
For achieving the above object, the utility model adopts following technical scheme:
A kind of device utilizing coupling technique to realize boiler smoke qualified discharge, comprise electrostatic synergy deduster, described electrostatic synergy deduster is connected with air-introduced machine by flue I, the other end of described air-introduced machine is connected with the import of desulfurizing tower by flue II, and the outlet of described desulfurizing tower is connected with chimney by flue III; Be laid with mixing arrangement in described flue I, ozone generating-device is connected with mixing arrangement by ozone feed-line, and technique water tank is connected with electrostatic synergy electric cleaner, ozone generating-device respectively by waterline.
The anode that described electrostatic synergy deduster closes on the electric field of gas vent is flexible anode, and the purge mode of flexible anode is for infiltrating liquid film deashing;
The flexible anode material of described electrostatic synergy deduster is the organic fabrix with insulation, hydrophobic, corrosion resistance characteristic.
Described mixing arrangement be combined sprinkler device or other can realize the device of gas rapid mixing.
Utilize coupling technique to realize a technique for boiler smoke qualified discharge, step is as follows:
(1) boiler smoke is first by the particle in electrostatic synergy deduster trapping flue gas, makes the dust concentration of electrostatic synergy house outlet be less than 15mg/Nm
3;
(2) ozone that ozone generating-device produces is joined in the mixing arrangement be laid in flue I, by mixing arrangement by ozone rapid dispersion in flue I, and there is oxidation reaction with Hg and NO in the flue gas after step (1) dedusting, Hg is oxidized to high-valence state soluble compound, and NO is oxidized to NO
2, the temperature of reaction is 100-150 DEG C, preferred 120-130 DEG C, and the reaction time is 1-3s, preferred 2s.The mol ratio of the NO in the ozone added and flue gas is 0.9-1.1;
(3) flue gas completing oxidation reaction in step (2) enters desulfurizing tower by flue II, SO in desulfurizing tower under the attraction of air-introduced machine
2, the mercury compound of high-valence state and NO
2also discharged desulfurizing tower in form of slurry by absorption, complete dedusting, desulfurization, the flue gas of denitration is eventually through flue III chimney discharge again.
In described step (1), water by being transported to electrostatic synergy deduster in technique water tank, as anode flushing water;
In described step (2), water is transported to ozone generating-device by technique water tank, and recycles.
The beneficial effects of the utility model:
(1) the utility model is by carrying out local flow improvement, increasing the measures such as ozone generating-device to existing electrostatic precipitator, successfully achieves the coupling of three kinds of technology such as electrostatic synergy dedusting, ozone oxidation, absorption.Start the existing environmental protecting device that reuses and realize the new idea of pollutant combined removal;
(2) implement need not the unit such as newly-built oxidation reactor, absorption tower for technology of the present utility model, therefore has reduced investment, floor space is little, the advantages such as retrofit work amount is little, operating cost is low;
(3) electrostatic synergy fine particle removes by the utility model, NO ozone oxidation, the unit such as gaseous contaminant absorption combine together, complement each other, last unit be after the Effec-tive Function of a unit, functional realiey create conditions, under Multiple techniques coordinates jointly, namely achieve the qualified discharge of flue gas.Outstanding behaviours is the removal of electrostatic synergy fine particle, avoids ozone, SO to the full extent
2, water three with fine particle be carrier generation heterogeneous reaction produce SO
4 2-possibility, the oxidation reaction of fine particle unit after the efficient removal of last unit makes is more pointed, more efficiently.In desulfurizing tower, SO
2absorb and there is S0 mutually
3 2-, HS0
3-wait reducing substances, they can impel NO
2react with it, make mass transfer rate become large, strengthen NO
2removal effect; On the other hand, due to NO in flue gas
xconcentration much smaller than SO
2, change more weak to the pH of absorbing liquid, make SO
2removal efficiency not obviously do not reduce.
(4) the utility model technology implements to have significant emission reduction effect, and denitration efficiency can reach more than 85%, and demercuration efficiency can reach more than 90%, and dust concentration is less than 15mg/Nm
3, final discharge flue gas can meet up-to-date environmental protection standard;
(5) electrostatic synergy electric cleaner and ozone generating-device can utilize full factory technique water tank water, and ozone cold radiator cooler cooling water reusable edible, technology implements repetition interest rate, the minimizing water consumption that at utmost can improve water.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram utilizing coupling technique to realize boiler smoke qualified discharge of the present utility model;
Wherein, 1-electrostatic synergy deduster, 2-ozone generating-device, 3-mixing arrangement, 4-technique water tank, 5-air-introduced machine, 6-desulfurizing tower, 7-chimney, 8-flue I, 9-flue II, 10-flue III.
Detailed description of the invention
The utility model is further described in conjunction with the embodiments, should be noted that following explanation is only to explain the utility model, its content not being limited.
Embodiment 1
As shown in Figure 1, a kind of device utilizing coupling technique to realize boiler smoke qualified discharge, comprise electrostatic synergy deduster 1, described electrostatic synergy deduster 1 is connected with air-introduced machine 5 by flue I, the other end of described air-introduced machine 5 is connected by the import of flue II with desulfurizing tower 6, and the outlet of described desulfurizing tower 6 is connected with chimney 7 by flue III; Be laid with mixing arrangement 3 in described flue I, ozone generating-device 2 is connected with mixing arrangement 3 by ozone feed-line, and technique water tank 4 is connected with electrostatic synergy electric cleaner 1, ozone generating-device 2 respectively by waterline.
Electrostatic synergy deduster 1 of the present utility model still retains electrostatic precipitator main body, be mainly used in the particle removing more than 10 μm particles, only the electric field that electrostatic precipitator closes on gas vent is changed into wet static dedusting mode, for preventing subparticle reentrainment of dust, improve the removal efficiency of overall deduster, simultaneously for the oxidation reaction of follow-up gaseous contaminant provides reliable and stable entry condition; Specifically, for main the transforming as of existing electrostatic precipitator: 1. the anode closing on the electric field of gas vent of electrostatic precipitator is transformed into flexible anode, anode material is the organic fabrix with insulation, hydrophobic, corrosion resistance characteristic.2. the purge mode of flexible anode adopts and infiltrates liquid film deashing, and namely moisture film to rinse after anode outside bleeder.Infiltrate liquid film ash removal method and breach the mode that conventional electrostatic deduster spraying liquid film washes away deashing, significantly decrease flushing water consumption, reduce deduster operating cost.3. one fresh water (FW) is drawn as pole plate flushing water from technique water tank.Dry wet Coupled Rigid-flexible positive plate electrostatic field mechanism, can effectively avoid " secondary fly-up " that conventional dry electric cleaner vibration dust-cleaning produces, ensures the low limit value discharge of house outlet gas dust concentration.
Utilize this device to carry out purified treatment to boiler smoke, realize the technique of boiler smoke qualified discharge, discharge for the boiler smoke in certain power station, specific as follows:
Certain flue gas in power station boiler amount is 8000Nm
3/ h, flue-gas temperature 130 DEG C, dust concentration 10g/Nm in flue gas
3, SO
2concentration is 2000mg/Nm
3, nitrogen oxide (with NO metering) concentration is for 400mg/Nm
3.Boiler smoke enters into electrostatic synergy electric cleaner 1, and the particle in flue gas is captured, and electrostatic synergy electric cleaner 1 exit flue gas concentration is less than 15mg/Nm
3, be that the ozone generating-device 2 of source of the gas produces ozone with oxygen, the amount of substance of the ozone of generation is 1:1 with the ratio of the amount of substance of NO in flue gas, and the ozone of generation enters into the mixing arrangement 3 laying flue I.By mixing arrangement 3, ozone is quickly dispersed in flue I, and with the lower valency gaseous contaminant N0 etc. in the flue gas after dedusting, oxidation reaction occurs, and the temperature of reaction is 120 DEG C, and reaction can complete instantaneously, and the nitric oxide of more than 70% is oxidized to NO
2, Hg is oxidized to Hg
2+, the flue gas completing oxidation reaction enters lime stone-gypsum wet desulphurization tower 6 by flue II under the attraction of air-introduced machine 5.In desulfurizing tower 6, SO
2, Hg
2+, NO
2also desulfurizing tower is discharged in form of slurry by absorption.One road fresh water (FW) is transported to electrostatic synergy electric cleaner 1 as anode flushing water from technique water tank 4; Second road fresh water (FW) is transported to ozone generating-device 2 as cooling water, and recycles.Complete dedusting, desulfurization, out of stock flue gas is discharged by chimney 7 eventually through flue III, and in the flue gas of discharge, dust concentration is less than 15mg/Nm
3, nitrogen oxide is (with NO
2metering) be less than 100mg/Nm
3, SO
2concentration is less than 50mg/Nm
3.
Claims (3)
1. the device utilizing coupling technique to realize boiler smoke qualified discharge, it is characterized in that, comprise electrostatic synergy deduster, described electrostatic synergy deduster is connected with air-introduced machine by flue I, the other end of described air-introduced machine is connected with the import of desulfurizing tower by flue II, and the outlet of described desulfurizing tower is connected with chimney by flue III; Be laid with mixing arrangement in described flue I, ozone generating-device is connected with mixing arrangement by ozone feed-line, and technique water tank is connected with electrostatic synergy electric cleaner, ozone generating-device respectively by waterline;
The anode that described electrostatic synergy deduster electric field closes on gas vent is flexible anode, and the purge mode of flexible anode is for infiltrating liquid film deashing.
2. a kind of device utilizing coupling technique to realize boiler smoke qualified discharge as claimed in claim 1, it is characterized in that, the flexible anode material of described electrostatic synergy deduster is organic fabrix.
3. a kind of device utilizing coupling technique to realize boiler smoke qualified discharge as claimed in claim 1, it is characterized in that, described mixing arrangement is combined sprinkler device.
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|---|---|---|---|
| CN201420407449.5U CN204042942U (en) | 2014-07-22 | 2014-07-22 | A kind of device utilizing coupling technique to realize boiler smoke qualified discharge |
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|---|---|---|---|
| CN201420407449.5U CN204042942U (en) | 2014-07-22 | 2014-07-22 | A kind of device utilizing coupling technique to realize boiler smoke qualified discharge |
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| CN204042942U true CN204042942U (en) | 2014-12-24 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075335A (en) * | 2014-07-22 | 2014-10-01 | 山东山大能源环境有限公司 | Process and device for realizing up-to-standard emission of boiler flue gas with coupling technology |
| CN104534491A (en) * | 2015-01-04 | 2015-04-22 | 山东大学 | Ultralow-dust rear smoke channel system of boiler |
| CN104841256A (en) * | 2015-05-27 | 2015-08-19 | 北京宜泽环保科技有限责任公司 | Zero discharge system for treating flue gas of boiler and method |
-
2014
- 2014-07-22 CN CN201420407449.5U patent/CN204042942U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075335A (en) * | 2014-07-22 | 2014-10-01 | 山东山大能源环境有限公司 | Process and device for realizing up-to-standard emission of boiler flue gas with coupling technology |
| CN104534491A (en) * | 2015-01-04 | 2015-04-22 | 山东大学 | Ultralow-dust rear smoke channel system of boiler |
| CN104841256A (en) * | 2015-05-27 | 2015-08-19 | 北京宜泽环保科技有限责任公司 | Zero discharge system for treating flue gas of boiler and method |
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Effective date of registration: 20170912 Address after: 100011 Beijing, Dongcheng District Anwai Binhe West Road No. 22 Shenhua building Co-patentee after: CHINA ENERGY SAVING REDUCTION CO., LTD. Patentee after: Shenhua Group LLC Co-patentee after: Shandong Shenhua Shan great energy environment Co., Ltd Co-patentee after: Shandong University Address before: 250014, Ji'nan City, Lixia District, Lixia District, Lishan Road, No. 173, Lishan County, B, South four blocks, Shandong Co-patentee before: Shandong University Patentee before: Shandong Shenhua Shan great energy environment Co., Ltd |