CN205055823U - Use and spout ammonia dust collector in advance in coal fired power plant flue gas - Google Patents
Use and spout ammonia dust collector in advance in coal fired power plant flue gas Download PDFInfo
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- CN205055823U CN205055823U CN201520848705.9U CN201520848705U CN205055823U CN 205055823 U CN205055823 U CN 205055823U CN 201520848705 U CN201520848705 U CN 201520848705U CN 205055823 U CN205055823 U CN 205055823U
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- China
- Prior art keywords
- ammonia
- cone
- flue gas
- spray ammonia
- coal
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Abstract
The utility model discloses an use and spout ammonia dust collector in advance in coal fired power plant flue gas, characterized by in import in the flue, be in the ammonia blowout one side of spouting the ammonia mouth and arrange that it changes the ware to spout the ammonia spiral pipe, make the spun ammonia get into along the tangential together with high -speed rotatory ash -laden gas and be upright barrel to form top -down's outer whirl in the barrel, be connected with the cone in the bottom of barrel, outside in the whirl rotatory particulate matter in the same direction as the lateral wall deposit of cone in the bottom of cone, set up the fill that gathers dust in the bottom of cone, set up the baffle at the middle part of cone, make descending air current reverse as on the baffle from bottom to top interior whirl, the blast pipe setting that is linked together with SCR denitration reactor is at the top of barrel, the opening down, with the flue gas intensive mixing under the effect of ammonia whirl and interior whirl outside. The utility model discloses simple structure, can extensively be used for the coal fired power plant SCR reactor before, accomplish simultaneously that the flue gas removes dust in advance and with the mixture of flow equalizing of ammonia.
Description
Technical field
The utility model relates to a kind of spray ammonia pre-dedusting device be applied in coal-fired plant flue gas, belongs to power-plant flue gas Treatment process field, runs and NO to improve its equipment for the protection of coal-burning power plant's SCR denitration system
xremoval efficiency.
Background technology
SCR SCR denitration technology is by certain density NH
3spray in flue and mix with flue gas, in the reactor through catalyst action, by NH
3and NO
xreaction generates nontoxic N
2and H
2o, reaches NO
xthe object removed.Because technology maturation, denitration efficiency are high, be acknowledged as the most effective coal-fired flue gas denitration method.In order to the economy of the high activity and operation that maintain catalyst, existing SCR denitration system generally adopts high dirt arrangement, is arranged between boiler economizer and air preheater by SCR reactor.Owing to flowing through the flue gas of this position without dedusting, the material of the dust granules containing high concentration in flue gas and Ca, the Se that can make catalyst poisoning, therefore, SCR denitration wearing and tearing, blocking and the poisoning difficult problem becoming this arrangement denitrating system and face.In addition, because the on-the-spot import straight pipeline of denitration is substantially very short, spray ammonia uniformity, Flow Field Distribution uniformity cause NH
3/ NO
xmixed effect is bad, Outlet Section NO
xthe representativeness of concentration is poor, and denitration efficiency is low, and the escaping of ammonia exceeds standard and a series of predicament such as air preheater blocking also becomes power plant's problem in the urgent need to address.
At present, although Catalyst Production producer also sets about from catalyst structure and machining process, actively take measures on customs clearance and increase the wearability of catalyst, as top sclerosis, wall thicken.But by coal in power plant supply complexity with multifariously to affect, these measures still cannot solve and use the wearing and tearing and blockage problem that ash-rich coal unit faces.In actual denitration engineering, power plant takes certain strategy to improve NH
3/ NO
xmixing intensity, as configuration dynamic mixer, FBE ammonia vortex mixer, dalta wing static mixer etc., these technology have oneself feature and success, but also some shortcomings of ubiquity: if flow Field Design is bad, easily cause the dust stratification of system; What have increases too greatly power consumption and the steel construction consumption of system because of resistance; Generally only be applied to small unit, apply not only resistance in large coal-fired power plant large, and require higher to flue gas flow rate, arrange more complicated.
Utility model content
The utility model is the weak point for avoiding existing for above-mentioned prior art, provides a kind of spray ammonia pre-dedusting device be applied in coal-fired plant flue gas, to effectively reducing SCR denitration system entrance dust concentration, improves NH
3/ NO
xmole mixture ratio, ensures the stability that catalyst activity and whole denitrating system run and economy.
The utility model is that technical solution problem adopts following technical scheme:
The design feature of the spray ammonia pre-dedusting device that the utility model is applied in coal-fired plant flue gas is:
In inlet flue duct, the ammonia ejection side that is in spray ammonia mouth arranges that spray ammonia helix tube turns device, the ammonia of ejection tangentially entered in upright cylindrical shell together with the ash-laden gas of High Rotation Speed, and in cylindrical shell, forms top-down contour stealth;
Be connected with cone in the bottom of described cylindrical shell, the particle rotated in contour stealth in the bottom of cone, arranges in the bottom of described cone the bucket that gathers dust along the side wall deposition of cone, and gather dust struggle against on be provided with ash discharge valve;
Arrange baffle plate at the middle part of described cone, make descending air-flow on baffle plate, be reversed to inward eddy from bottom to top, the blast pipe be connected with SCR denitration reactor is arranged on the top of cylindrical shell, opening down.
The design feature of the spray ammonia pre-dedusting device that the utility model is applied in coal-fired plant flue gas is also:
Described spray ammonia mouth is set to ring-type.
Described baffle plate is on horizonal base plate, arrange the gusset plate with tapering.
It is for material with the specialty metal of high temperature resistant, erosion resistant and corrosion or ceramic material that described spray ammonia helix tube turns device.
Arranging described spray ammonia helix tube, to turn the downward-sloping angle of device be 10 °.
The utility model is by arranging that spray ammonia helix tube turns device, High Rotation Speed ash-laden gas forms downward contour stealth together with ammonia tangentially to enter cylindrical shell, due to particle and smoke density difference, be separated from flue gas by centrifugal acceleration effect and get rid of to wall, be deposited on cone base.When air-flow continues to go downwards to cone base baffle plate, form the inward eddy on counter steer, deliver to SCR denitration reactor through blast pipe.Ammonia fully mixes with flue gas under contour stealth and inward eddy effect.Compared with the prior art, the utility model beneficial effect is embodied in:
1, centrifugal pre-dustproof function.
The utility model makes the particle concentration entered in SCR denitration reactor flue gas greatly reduce, and effectively solves SCR denitration wearing and tearing, blocking and the problem such as poisoning.
The utility model carries out pre-dedusting to larger flue gas particles, reduces its concentration in deduster import, improves dust collector efficiency, achieves many equipment collaborations dust removing effects.
2, ammonia nitrogen Combination effect is improved.
The utility model effectively reduces mixing distance, for shortening flue length, reduces the consumption of deflector, cowling panel, thus reduces denitration improvement project cost.
The utility model optimization spray ammonia and Flow Field Distribution, to make under different load NO on Outlet Section
xconcentration all has good representativeness, and relatively accurate data can be provided to make power plant operations staff accurately regulate and control the operation of denitrification apparatus.
The utility model improves SCR denitration efficiency, alleviates air preheater fouling simultaneously, reduces the utilization rate etc. of the escaping of ammonia secondary pollution and raising power plant ammonia.
3, actual operation is strong.
The utility model is workable, by adjustable screw pipe rotating speed, can change the magnitude range of pre-dedusting particle, has good pre-dust removing effects to the flue gas that the coal of the different ash content of burning produces.
The utility model simplifies ammonia-spraying grid, and entirety needs the advantages such as increase equipment is few, and body resistance is little, structure is simple, widely applicable, for effectively application provides guarantee.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation;
Number in the figure: 1 inlet flue duct, 2 spray ammonia helix tubes turn device, 3 spray ammonia mouths, and 4 is SCR denitration reactor, 5 cylindrical shells, 6 cones, 7 contour stealth, 8 ash discharge valves, and 9 gather dust bucket, 10 pneumatic carriers, 11 baffle plates, 12 inward eddies, 13 blast pipes.
Detailed description of the invention
See Fig. 1, the version being applied in the spray ammonia pre-dedusting device in coal-fired plant flue gas in the present embodiment is:
In inlet flue duct 1, the ammonia ejection side that is in spray ammonia mouth 3 arranges that spray ammonia helix tube turns device 2, the ammonia of ejection is tangentially entered in upright cylindrical shell 5 together with the ash-laden gas of High Rotation Speed, and form top-down contour stealth 7 with centrifugal acceleration motion in cylindrical shell 5.
Cone 6 is connected with in the bottom of cylindrical shell 5, according to spin moment invariance principle, in cone 6, the tangential velocity of air-flow improves constantly, the particle rotated in contour stealth 7 is subject to the effect of centrifugal acceleration by the side wall deposition along cone 6 in the bottom of cone 6, in the bottom of cone 6, the bucket 9 that gathers dust is set, and be provided with ash discharge valve 8 gathering dust on bucket 9, open ash discharge valve 8 and the dust collected in the bucket 9 that gathers dust can be delivered to Power Plant Ash storehouse by pneumatic carrier 10.
At the middle part of cone 6, baffle plate 11 is set, make descending air-flow on baffle plate 11, be reversed to inward eddy 12 from bottom to top, the blast pipe 13 be connected with SCR denitration reactor 4 is arranged on the top of cylindrical shell 5, opening down, entered by blast pipe 13 after the flue gas of relative purification is up and import SCR denitration reactor 4, baffle plate 11 vertical section shown in Fig. 1 is trapezoidal, that the gusset plate with tapering is set on horizonal base plate, its tapering is basic consistent with the tapering of cone 6, and this form is more conducive to the formation of inward eddy 12.
In concrete enforcement, corresponding vibrational power flow also comprises: spray ammonia mouth 3 is set to ring-type; It is with the specialty metal of high temperature resistant, erosion resistant and corrosion or ceramic material for material that spray ammonia helix tube turns device 2, can resistance to temperature be 600 DEG C; Arranging spray ammonia helix tube, to turn the downward-sloping angle of device 2 be 10 °, ensures that ash-laden gas is rotated down after entering cylindrical shell 5.
High Rotation Speed ash-laden gas tangentially enters cylindrical shell 5 together with the ammonia sprayed into by nozzle 3, and particle is separated in centrifugal acceleration effect and gets rid of to wall from flue gas, is deposited on cone base.Air-flow continues to go downwards to cone base baffle plate 11, forms inward eddy 12 upwards, delivers to SCR denitration reactor 4 through blast pipe 13.Flue gas, before entering SCR denitration reactor, completes pre-dedusting simultaneously and mixes with the current-sharing of ammonia, and available protecting is unified and improved coal-burning power plant's SCR denitration equipment operation and NO
xremoval efficiency.
In embody rule, import tolerance is Q=3600A × V, and wherein A is import sectional area, and V is inlet air flow speed, and the air velocity of this device air inlet controls at 10 ~ 20m/s, can the number of applications increasing this device in parallel according to coal unit exhaust gas volumn size.
Claims (5)
1. be applied in the spray ammonia pre-dedusting device in coal-fired plant flue gas, it is characterized in that:
In inlet flue duct (1), the ammonia ejection side that is in spray ammonia mouth (3) arranges that spray ammonia helix tube turns device (2), the ammonia of ejection is tangentially entered in upright cylindrical shell (5) together with the ash-laden gas of High Rotation Speed, and form top-down contour stealth (7) in cylindrical shell (5);
Cone (6) is connected with in the bottom of described cylindrical shell (5), the particle rotated in the contour stealth (7) along the side wall deposition of cone (6) in the bottom of cone (6), arrange in the bottom of described cone (6) and to gather dust bucket (9), and be provided with ash discharge valve (8) gathering dust on bucket (9);
At the middle part of described cone (6), baffle plate (11) is set, make descending air-flow on baffle plate (11), be reversed to inward eddy (12) from bottom to top, the blast pipe (13) be connected with SCR denitration reactor (4) is arranged on the top of cylindrical shell (5), opening down.
2. the spray ammonia pre-dedusting device be applied in coal-fired plant flue gas according to claim 1, is characterized in that: described spray ammonia mouth (3) is set to ring-type.
3. the spray ammonia pre-dedusting device be applied in coal-fired plant flue gas according to claim 1, is characterized in that: described baffle plate (11) is on horizonal base plate, arrange the gusset plate with tapering.
4. according to claim 1 being applied in coal-fired plant flue gas sprays ammonia pre-dedusting device, it is characterized in that: it is for material with the specialty metal of high temperature resistant, erosion resistant and corrosion or ceramic material that described spray ammonia helix tube turns device (2).
5. the spray ammonia pre-dedusting device be applied in coal-fired plant flue gas according to claim 1, is characterized in that: arranging described spray ammonia helix tube, to turn the downward-sloping angle of device (2) be 10 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520848705.9U CN205055823U (en) | 2015-10-27 | 2015-10-27 | Use and spout ammonia dust collector in advance in coal fired power plant flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520848705.9U CN205055823U (en) | 2015-10-27 | 2015-10-27 | Use and spout ammonia dust collector in advance in coal fired power plant flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205055823U true CN205055823U (en) | 2016-03-02 |
Family
ID=55382427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520848705.9U Expired - Fee Related CN205055823U (en) | 2015-10-27 | 2015-10-27 | Use and spout ammonia dust collector in advance in coal fired power plant flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205055823U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110152485A (en) * | 2019-05-24 | 2019-08-23 | 中建材环保研究院（江苏）有限公司 | A kind of cement kiln fume high-temperature denitration dust collecting device |
| CN112807991B (en) * | 2020-12-30 | 2022-07-01 | 启源（西安）大荣环保科技有限公司 | Corrugated-honeycomb denitration catalyst coupling module |
-
2015
- 2015-10-27 CN CN201520848705.9U patent/CN205055823U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110152485A (en) * | 2019-05-24 | 2019-08-23 | 中建材环保研究院（江苏）有限公司 | A kind of cement kiln fume high-temperature denitration dust collecting device |
| CN112807991B (en) * | 2020-12-30 | 2022-07-01 | 启源（西安）大荣环保科技有限公司 | Corrugated-honeycomb denitration catalyst coupling module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20181027 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |