CN205517269U - SCR denitrification facility suitable for two economizers, air preheater staggered arrangement - Google Patents
SCR denitrification facility suitable for two economizers, air preheater staggered arrangement Download PDFInfo
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- CN205517269U CN205517269U CN201620043239.1U CN201620043239U CN205517269U CN 205517269 U CN205517269 U CN 205517269U CN 201620043239 U CN201620043239 U CN 201620043239U CN 205517269 U CN205517269 U CN 205517269U
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Abstract
The utility model provides a SCR denitrification facility suitable for two economizers, air preheater staggered arrangement, relates to the flue gas denitrification technology field. The utility model discloses it has rectifier, a plurality of catalyst layer and a plurality of sound wave soot blower, a plurality of catalyst layers and a plurality of sound wave soot blower interval arrangement to deploy on the SCR reactor. Structurally, the SCR reactor is deployed down has the low -level (stack -gas) economizer. Separate by the expansion joint between low -level (stack -gas) economizer and the bottom catalyst layer, put the guide plate between low -level (stack -gas) economizer and the expansion joint. It supports the tube bank of low -level (stack -gas) economizer to put a supporting beam in the middle of the low -level (stack -gas) economizer. Access boiler system is connected to the entry flue of SCR reactor and mode and the low -level (stack -gas) economizer shell that exhaust pass adopted the side to advance, incline out. Entry flue and exhaust pass separate through the baffle in the low -level (stack -gas) economizer shell, and the outflow flue gas gets into the low temperature air preheater behind exhaust pass and low -level (stack -gas) economizer shell. The utility model has the characteristics of SCR deNOx systems interface space is little, the investment is low, the transformation cycle is short.
Description
Technical field
This utility model relates to gas denitrifying technology field, especially for the industry such as petrochemical industry, chemical industry power plant for self-supply middle and small burn coal boiler double economizer, the SCR denitration device of air preheater interlaced arrangement.
Background technology
The discharge of NOx and the control focus that always environmental area is paid close attention to.At present, coal-burning boiler controls the measure of NOx emission two big classes, and a class is the discharge that the optimization by combustion process reduces NOx, such as low-NO_x combustion technology；Another kind of is to utilize reducing agent to be reduced by the NOx in flue gas, including SCR SCR denitration technology and SNCR SNCR denitration technology.But, low-NO_x combustion technology and SNCR denitration technology the most all cannot meet the discharge standard of country's formulation.Therefore, SCR technology becomes current coal-burning boiler denitration mainstream technology.
SCR denitration technology of the prior art, usual boiler tail needs the space of reserved 5-7m to be connected with SCR system import and export flue, and requisite space is big.For the industry private station such as petrochemical industry, chemical industry uses double air preheater, the middle and small burn coal boiler of economizer interlaced arrangement, boiler tail is without connecting SCR system space, air preheaters double to boiler tail, economizer simultaneously is needed to transform, in order to reserve enough connection space for SCR system.Though part boiler can be implemented by this scheme, but the cycle of denitration transformation is long, and cost of investment is high.
Summary of the invention
For above-mentioned the deficiencies in the prior art, the purpose of this utility model is to provide and a kind of is applicable to double economizer, the SCR denitration device of air preheater interlaced arrangement.It has, and SCR denitration system per-interface space is little, it is low to invest, the transformation cycle is short feature.
In order to reach foregoing invention purpose, the technical solution of the utility model realizes as follows:
A kind of being applicable to double economizer, the SCR denitration device of air preheater interlaced arrangement, it includes high temperature air preheater, low-level (stack-gas) economizer shell and the SCR reactor being sequentially connected with boiler.SCR reactor top is equipped with commutator, multiple catalyst layer and multiple acoustic wave ash ejector, multiple catalyst layers and multiple acoustic wave ash ejector interval and arranges.It is structurally characterized in that, described SCR reactor lower part is equipped with low-level (stack-gas) economizer.Separated by expansion joint between low-level (stack-gas) economizer and bottom catalyst layer, between low-level (stack-gas) economizer and expansion joint, be equipped with deflector.It is equipped with support beam in the middle of low-level (stack-gas) economizer the tube bank of low-level (stack-gas) economizer to be supported.The gas approach of SCR reactor and exhaust pass use the mode that side is entered, side goes out to be connected access steam generator system with low-level (stack-gas) economizer shell.Gas approach and exhaust pass are separated by dividing plate in low-level (stack-gas) economizer shell, flow out flue gas and enter low temperature air preheater after exhaust pass and low-level (stack-gas) economizer shell.
In above-mentioned SCR denitration device, the catalyst layer of the described bottom is 2-3m with the spacing of the first row pipe of low-level (stack-gas) economizer, leaves 0.5-0.8m straight section above first row pipe.
In above-mentioned SCR denitration device, the import header one of described low-level (stack-gas) economizer is arranged on the avris of SCR reactor, and the outlet header of low-level (stack-gas) economizer is arranged on the SCR reactor side near boiler.Outlet header is connected with the import header two of high-temperature economizer in boiler by pipeline.
This utility model compared with prior art, has the advantage that
1) SCR system flue uses side to enter the connected mode that side goes out, and import and export flue, in same level height, decreases the per-interface space needed for SCR system.
2) low-level (stack-gas) economizer is placed on the bottom of SCR reactor by this utility model, heating surface area is held essentially constant, and not only solves SCR system per-interface space problem, and compared with prior art is transformed two-stage economizer, two-stage air preheater simultaneously, cost can be reduced, shorten the transformation cycle.
3) low-level (stack-gas) economizer is placed in SCR reactor lower part, without the transformation blowing out for low-level (stack-gas) economizer in improvement project, decreases furnace outage time.
The utility model is described in further detail with detailed description of the invention below in conjunction with the accompanying drawings.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model；
Fig. 2 is that the A-A of Fig. 1 is to elevational schematic view；
Fig. 3 is that the B-B of Fig. 1 is to floor map.
Detailed description of the invention
Referring to Fig. 1 to Fig. 3, this utility model is applicable to double economizer, the SCR denitration device of air preheater interlaced arrangement, and it includes high temperature air preheater 1, low-level (stack-gas) economizer the shell 2 and SCR reactor 5 being sequentially connected with boiler.SCR reactor 5 top is equipped with commutator 6, multiple catalyst layer 7 and multiple acoustic wave ash ejector 8, multiple catalyst layers 7 and multiple acoustic wave ash ejector 8 and arranges at vertical direction interval.SCR reactor 5 bottom is equipped with low-level (stack-gas) economizer 11, is separated by expansion joint 9 between low-level (stack-gas) economizer 11 and bottom catalyst layer 7, is equipped with deflector 10 between low-level (stack-gas) economizer 11 and expansion joint 9.It is equipped with one group in the middle of low-level (stack-gas) economizer 11 by the support beam 14 of two channel-section steel Two bors d's oeuveres, the form hung under employing is propped up, the tube bank 13 of low-level (stack-gas) economizer 11 to be supported.The catalyst layer 7 of the bottom is 2-3m with the spacing of the first row pipe 12 of low-level (stack-gas) economizer 11, leaves 0.5-0.8m straight section above first row pipe 12.The gas approach 4 of SCR reactor 5 and exhaust pass 19 all use the mode that side is entered, side goes out to be connected access steam generator system with low-level (stack-gas) economizer shell 2, gas approach 4 and exhaust pass 19 are separated by dividing plate 3 in low-level (stack-gas) economizer shell 2, flow out flue gas and enter low temperature air preheater 20 after exhaust pass 19 and low-level (stack-gas) economizer shell 2.The import header 1 of low-level (stack-gas) economizer 11 is arranged on the avris of SCR reactor 5, and the outlet header 18 of low-level (stack-gas) economizer 11 is arranged on the SCR reactor 5 side by boiler, and outlet header 18 is connected with the import header 2 21 of high-temperature economizer in boiler 22 by pipeline.
Low-level (stack-gas) economizer 11 supports support beam 14 by the column 15 on lower section Vierendeel girder 17.Support beam 14 is heated in temperature economizer 11 simultaneously, and centre needs ventilating and cooling.Between support beam 14 and column 15, one end is welded, and one end uses slide construction, reduces the thermal walking that thermal expansion produces.Left and right backplate welds with support beam 14, and forward and backward backplate welds mutually with left and right backplate, and all load of low-level (stack-gas) economizer 11 is all passed on Vierendeel girder 17 by the column 15 being connected with support beam 14.
During utility model works, flue gas is in boiler high temperature air preheater 1 enters the low-level (stack-gas) economizer shell 2 removing tube bank.Dividing plate 3 in low-level (stack-gas) economizer shell 2 is by spaced apart from high temperature air preheater 1 and low temperature air preheater 20 of flue gas.Dividing plate 3 top flue gas enters SCR reactor 5 sideways through gas approach 4.SCR reactor 5 has the catalyst 7 of commutator 6 and multilamellar, above every layer of catalyst 7, all arranges one group of acoustic wave ash ejector 8.The boiler smoke rectification by commutator 6, then NOx in multi-layer catalyst 7 reduces flue gas.The flue gas of abjection NOx enters the low-level (stack-gas) economizer 11 of SCR reactor 5 bottom, and flue gas enters the low temperature air preheater 20 of boiler tail by exhaust pass 19 from side afterwards.
Claims (3)
- null1. one kind is applicable to double economizer、The SCR denitration device of air preheater interlaced arrangement，It includes the high temperature air preheater (1) being sequentially connected with boiler、Low-level (stack-gas) economizer shell (2) and SCR reactor (5)，SCR reactor (5) top is equipped with commutator (6)、Multiple catalyst layers (7) and multiple acoustic wave ash ejector (8)，The plurality of catalyst layer (7) and multiple acoustic wave ash ejector (8) interval are arranged，It is characterized in that，Described SCR reactor (5) bottom is equipped with low-level (stack-gas) economizer (11)，Separated by expansion joint (9) between low-level (stack-gas) economizer (11) and bottom catalyst layer (7)，Deflector (10) it is equipped with between low-level (stack-gas) economizer (11) and expansion joint (9)，It is equipped with support beam (14) in the middle of low-level (stack-gas) economizer (11) tube bank (13) of low-level (stack-gas) economizer (11) to be supported，The gas approach (4) of SCR reactor (5) and exhaust pass (19) use side to enter、The mode that side goes out is connected access steam generator system with low-level (stack-gas) economizer shell (2)，Gas approach (4) and exhaust pass (19) are separated by dividing plate (3) in low-level (stack-gas) economizer shell (2)，Flow out flue gas after exhaust pass (19) and low-level (stack-gas) economizer shell (2), enter low temperature air preheater (20).
- It is applicable to double economizer, the SCR denitration device of air preheater interlaced arrangement the most according to claim 1, it is characterized in that, the catalyst layer (7) of the described bottom is 2-3m with the spacing of the first row pipe (12) of low-level (stack-gas) economizer (11), and 0.5-0.8m straight section is left in first row pipe (12) top.
- The most according to claim 1 or claim 2 it is applicable to double economizer, the SCR denitration device of air preheater interlaced arrangement, it is characterized in that, the import header one (16) of described low-level (stack-gas) economizer (11) is arranged on the avris of SCR reactor (5), the outlet header (18) of low-level (stack-gas) economizer (11) is arranged on the SCR reactor (5) side near boiler, and outlet header (18) is connected with the import header two (21) of high-temperature economizer in boiler (22) by pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620043239.1U CN205517269U (en) | 2016-01-18 | 2016-01-18 | SCR denitrification facility suitable for two economizers, air preheater staggered arrangement |
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| CN201620043239.1U CN205517269U (en) | 2016-01-18 | 2016-01-18 | SCR denitrification facility suitable for two economizers, air preheater staggered arrangement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106871148A (en) * | 2017-03-31 | 2017-06-20 | 冯力燕 | The threeway switching device of Denitration in Boiler |
| CN106975356A (en) * | 2016-01-18 | 2017-07-25 | 同方环境股份有限公司 | It is a kind of to be applied to double economizer, the SCR denitration systems of air preheater interlaced arrangement |
-
2016
- 2016-01-18 CN CN201620043239.1U patent/CN205517269U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106975356A (en) * | 2016-01-18 | 2017-07-25 | 同方环境股份有限公司 | It is a kind of to be applied to double economizer, the SCR denitration systems of air preheater interlaced arrangement |
| CN106871148A (en) * | 2017-03-31 | 2017-06-20 | 冯力燕 | The threeway switching device of Denitration in Boiler |
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