CN208809802U - The SCR denitration device of boiler smoke - Google Patents
The SCR denitration device of boiler smoke Download PDFInfo
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- CN208809802U CN208809802U CN201821293209.1U CN201821293209U CN208809802U CN 208809802 U CN208809802 U CN 208809802U CN 201821293209 U CN201821293209 U CN 201821293209U CN 208809802 U CN208809802 U CN 208809802U
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- tank
- liquefied ammonia
- denitration
- spray head
- fan
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Abstract
The SCR denitration device of boiler smoke, including denitration tank, denitration tank top is connected to air inlet pipe, the bottom of denitration tank is connected to air outlet pump, air outlet pump is connected to escape pipe, liquefied ammonia spray head is set in denitration tank, one group of liquefied ammonia spray head is respectively set in out of stock tank internal upper part and lower part, laterally setting is catalyzed cylinder between two groups of liquefied ammonia spray heads, it is catalyzed the inner hollow setting of cylinder, it is catalyzed the inside catalyst filling of cylinder, through-hole is set on catalysis cylinder, the diameter of through-hole is less than the partial size of catalyst, one end of catalysis cylinder is fixedly connected with the output shaft of motor, the inner wall of the other end and out of stock tank that are catalyzed cylinder is rotatablely connected, the first fan is set below the liquefied ammonia spray head of one group of top, first fan to blow wind direction downward, positioned at the top of one group of lower part liquefied ammonia spray head, the second fan is set, second fan to blow wind direction upward.The utility model can be such that flue gas is sufficiently mixed with liquefied ammonia by the first fan with the second fan, to effectively improve the transfer efficiency of the NOx in flue gas.
Description
Technical field
The utility model belongs to fume treatment field, the specifically SCR denitration device of boiler smoke.
Background technique
Selective catalytic reduction (Selective Catalytic Reduction, SCR) refers to the effect in catalyst
Under, utilize reducing agent (such as NH3, liquefied ammonia, urea) come " selective " reacted with the NOx in flue gas and generate nontoxic no dirt
The N of dye2And H2O.SCR technology at 1977 and 1979, successfully use on fuel oil and coal-burning boiler by investment business.SCR technology
It is very significant to boiler smoke NOx control effect, technology is more mature, have become at present in the world using at most, it is most effective
A kind of gas denitrifying technology.Under reasonable arrangement and temperature range, 80~90% removal efficiency can reach.In China, utilize
The work that SCR carries out denitrating flue gas just starts to walk.It can be in air NOx conversion by ammonification during SCR denitration
Nitrogen (the N naturally contained2) and water (H2O), main chemical reaction is as follows:
4NO+4NH3+O2→4N2+6H2O
6NO+4NH3→5N2+6H2O
6NO2+8NH3→7N2+12H2O
2NO2+4NH3+O2→3N2+6H2O
In the case where no catalyst, above-mentioned chemical reaction only within the scope of very narrow temperature (850~1100 DEG C) into
Row, using reaction activity is reduced after catalyst, can carry out under the conditions of lower temperature (300~400 DEG C).And selectivity
Under the conditions of referring to existing for the effect of catalyst and oxygen, preferentially with NOx reduction reaction occurs for NH3, and in flue gas of getting along well
Oxygen carries out oxidation reaction.SCR system mostly uses high temperature catalyst both at home and abroad at present, and reaction temperature is at 315~400 DEG C.
Due at present no matter frequently with liquefied ammonia as reducing agent, liquefied ammonia gasifies after meeting with high-temperature flue gas, and flue gas
Density, which is greater than both ammonias, cannot quickly be sufficiently mixed to influence the transfer efficiency of the NOx in flue gas, and current catalytic plate
Fixed setting flue gas and the limited transfer efficiency to influence the NOx in flue gas of catalytic plate contact area.
Utility model content
The utility model provides the SCR denitration device of boiler smoke, to solve defect in the prior art.
The utility model is achieved by the following technical programs:
The SCR denitration device of boiler smoke, including denitration tank, the denitration tank top is connected to air inlet pipe, described
The bottom of denitration tank is connected to air outlet pump, and the air outlet pump is connected to escape pipe, and liquefied ammonia spray head is arranged in the denitration tank,
One group of liquefied ammonia spray head is respectively set in the denitration tank internal upper part and lower part, is laterally arranged between liquefied ammonia spray head described in two groups and urges
Change cylinder, the inner hollow of the catalysis cylinder is arranged, the inside catalyst filling of the catalysis cylinder, sets on the catalysis cylinder
Through-hole is set, the diameter of the through-hole is less than the partial size of catalyst, and described one end of catalysis cylinder and the output shaft of motor are fixed
Connection, the other end of catalysis cylinder and the inner wall of denitration tank are rotatablely connected, and are located at setting below the liquefied ammonia spray head of one group of top
First fan, first fan blow that wind direction is downward, and the second fan is arranged positioned at the top of one group of lower part liquefied ammonia spray head,
Second fan to blow wind direction upward.
The SCR denitration device of boiler smoke as described above, the denitration tank are connected to by air inlet pipe with aspiration pump, institute
The aspiration pump stated is connected to the top of filtering tank, and three layer filtration net, the filtering of the filter screen are arranged in the filtering tank
Aperture is sequentially increased from top to bottom, and the filter screen is funnel-shaped, and high pressure water jets are arranged in the top of filter screen described in every layer
The bottom of head, the filtering tank is connected to connecting tube, is connected in the middle part of the connecting tube with one end of drainpipe, the company
Valve is set on the lower part of adapter tube and drainpipe, and the other end of the drainpipe connects draining pump.
Flue gas heater, the cigarette is arranged on the escape pipe in the SCR denitration device of boiler smoke as described above
Electric boiling plate is set in hot-air heater, thermometer is set on the escape pipe between the flue gas heater and filtering tank.
The utility model has the advantages that: the utility model can be such that flue gas fills with liquefied ammonia by the first fan with the second fan
Divide mixing, to effectively improve the transfer efficiency of the NOx in flue gas.The utility model when in use flue gas by air inlet pipe into
Enter the ammonia that gasifies rapidly after denitration tank and liquefied ammonia spray head spray the drive of the first fan quickly adequately mix merga pass with
The catalyst contact being catalyzed in cylinder, and motor is able to drive catalysis cylinder rotation and contacts flue gas more fully with catalyst, from
And the liquid for effectively improving the transfer efficiency of the NOx in flue gas, while lower part liquefied ammonia spray head capable of being made to spray by the second fan
Ammonia is sufficiently mixed with flue gas again and catalyst in the catalysis cylinder of rotation under the action of react to the raising cigarette of effect
The transfer efficiency of NOx in gas.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is
Some embodiments of the utility model, for those of ordinary skill in the art, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the utility model structure diagram；
Fig. 2 is the enlarged drawing of the A direction view of Fig. 1；
Fig. 3 is enlarged drawing of the Fig. 1 along the cross-sectional view of line B-B.
Appended drawing reference: 1, denitration tank；2, air inlet pipe；3, escape pipe；4, liquefied ammonia spray head；5, it is catalyzed cylinder；6, motor；7,
One fan；8, the second fan；9, filtering tank；10, filter screen；11, high-pressure water nozzle；12, connecting tube；13, drainpipe；14, valve
Door；15, draining pump；16, flue gas heater；17, electric boiling plate；18, thermometer；19, through-hole；20, air outlet pump；21, it is evacuated
Pump.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The range of the utility model protection.
The SCR denitration device of boiler smoke, including denitration tank 1,1 top of denitration tank are connected to air inlet pipe 2, institute
The bottom for the denitration tank 1 stated is connected to air outlet pump 20, and the air outlet pump 20 is connected to escape pipe 3, in the denitration tank 1
Liquefied ammonia spray head 4 is set, and one group of liquefied ammonia spray head 4, the spray of liquefied ammonia described in two groups is respectively set in 1 internal upper part of denitration tank and lower part
Laterally setting catalysis cylinder 5, the inside filling of the inner hollow setting of the catalysis cylinder 5, the catalysis cylinder 5 are urged between first 4
Agent, through-hole 19 is arranged on the catalysis cylinder 5, and the diameter of the through-hole 19 is less than the partial size of catalyst, the catalysis
One end of cylinder 5 is fixedly connected with the output shaft of motor 6, and the other end of catalysis cylinder 5 and the inner wall of denitration tank 1 rotate and connect
Connect, the first fan 7 be set below the liquefied ammonia spray head 4 of one group of top, first fan 7 to blow wind direction downward, be located at
The top of one group of lower part liquefied ammonia spray head 4 is arranged the second fan 8, second fan 7 to blow wind direction upward.This is practical new
The ammonia that type gasifies rapidly after flue gas is sprayed by air inlet pipe 2 into denitration tank 1 and liquefied ammonia spray head 4 when in use is in the first fan
Quickly adequately mixed merga pass is contacted with the catalyst being catalyzed in cylinder 5 for 7 drive, and motor 6 is able to drive catalysis cylinder 5 and rotates
It contacts flue gas more fully with catalyst, to effectively improve the transfer efficiency of the NOx in flue gas, while passing through second
The liquefied ammonia that fan 8 can be such that lower part liquefied ammonia spray head 4 sprays is sufficiently mixed again with flue gas and urging in the catalysis cylinder 5 of rotation
Carry out reacting the transfer efficiency for improving the NOx in flue gas to effect under the action of agent.
Specifically, will affect reaction rate in denitration tank 1 due to carrying a large amount of dust in flue gas, on overcoming
Problem is stated, denitration tank 1 described in the present embodiment is connected to by air inlet pipe 2 with aspiration pump 21, the aspiration pump 21 and filtering tank 9
Top connection, three layer filtration net 10 is set in the filtering tank 9, the pore size filter of the filter screen 10 from top to bottom according to
Secondary increase, the filter screen 10 is funnel-shaped, and high-pressure water nozzle 11 is arranged in the top of filter screen 10 described in every layer, described
The bottom of filtering tank 9 is connected to connecting tube 12, and 12 middle part of connecting tube is connected to one end of drainpipe 13, the connection
Valve 14 is set on the lower part of pipe 12 and drainpipe 13, and the other end of the drainpipe 13 connects draining pump 15.Passed through
Strainer 10 can effectively obstruct dust, while the filter screen 10 being sequentially increased by pore size filter from top to bottom can effectively be kept away
Exempt from the blocking of filter screen 10, while funnelform filter screen 10 can effectively increase filter area, improves filter efficiency, while in pot
Furnace opens the valve 14 on drainpipe 13 without using the valve 14 in connecting tube 12 is closed when clearing up filter screen 10, high
Pressure sprinkler head 11 is rinsed filter screen 10, is discharged by draining pump 15 by the waste water that filter screen 10 generates is cleared up, it is ensured that mistake
The normal use of filter tank 9.
Even if specifically, since reaction activity can be reduced using catalyst, but reacting also will be at 300~400 DEG C
Under the conditions of carry out effectively removing NOx in flue gas, and flue gas can radiate in moving process, and the temperature of liquefied ammonia is very low
Will lead into 1 wild beast anger waistband of denitration tank will lead to temperature rapid decrease after liquefied ammonia mixing, to influence in flue gas
Flue gas heater 16 is arranged in order to overcome the above problem in the transfer efficiency of NOx on escape pipe 3 described in the present embodiment, described
Electric boiling plate 17 is set in flue gas heater 16, is arranged on the escape pipe 3 between the flue gas heater 16 and filtering tank 9
Thermometer 18.The actual temp of flue gas at this time can be easily learnt by thermometer 18, if temperature can satisfy reaction needs
Flue gas is not heated then, but temperature passes through the electric heating in flue gas heater 16 if not being able to satisfy reaction and needing
Plate 17 heats flue gas, so that it is guaranteed that the transfer efficiency of the NOx in flue gas.
Embodiment
The SCR denitration device of boiler smoke, including denitration tank 1,1 top of denitration tank are connected to air inlet pipe 2, institute
The denitration tank 1 stated is connected to by air inlet pipe 2 with aspiration pump 21, and the aspiration pump 21 is connected to the top of filtering tank 9, described
Three layer filtration net 10 is set in filtering tank 9, and the pore size filter of the filter screen 10 is sequentially increased from top to bottom, the filtering
Net 10 is funnel-shaped, and the top of filter screen 10 described in every layer is arranged high-pressure water nozzle 11, the bottom of the filtering tank 9 with
Connecting tube 12 is connected to, and 12 middle part of the connecting tube is connected to one end of drainpipe 13, the lower part of the connecting tube 12 and
Valve 14 is set on drainpipe 13, and the other end of the drainpipe 13 connects draining pump 15, is arranged on the escape pipe 3
Flue gas heater 16, is arranged electric boiling plate 17 in the flue gas heater 16, the flue gas heater 16 and filtering tank 9 it
Between escape pipe 3 on thermometer 18 is set, the bottom of the denitration tank 1 is connected to air outlet pump 20, the air outlet pump 20 and
Escape pipe 3 is connected to, and liquefied ammonia spray head 4 is arranged in the denitration tank 1,1 internal upper part of denitration tank and lower part are respectively set one
Liquefied ammonia spray head 4 is organized, catalysis cylinder 5 is laterally set between liquefied ammonia spray head 4 described in two groups, the inner hollow of the catalysis cylinder 5 is set
It sets, the inside catalyst filling of the catalysis cylinder 5, through-hole 19, the diameter of the through-hole 19 is set on the catalysis cylinder 5
Less than the partial size of catalyst, one end of the catalysis cylinder 5 is fixedly connected with the output shaft of motor 6, and described is catalyzed the another of cylinder 5
The inner wall of one end and denitration tank 1 is rotatablely connected, and is arranged the first fan 7 below the liquefied ammonia spray head 4 of one group of top, and described the
One fan 7 blows that wind direction is downward, and the second fan 8, second fan is arranged positioned at the top of one group of lower part liquefied ammonia spray head 4
7 to blow wind direction upward.
Finally, it should be noted that in the description of the utility model, it is to be understood that term " top ", " bottom ", " one
End ", " other end ", " top ", " bottom end ", "upper", "lower", "left", "right", " side ", "inner", " middle part ", " center ", " two
The orientation or positional relationship of the instructions such as end " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing this reality
It is described with novel with simplified, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore should not be understood as limiting the present invention.In the present invention, unless otherwise specific
Regulation and restriction, the terms such as term " installation ", " setting ", " connection ", " fixation ", " rotation connection " shall be understood in a broad sense, for example,
Can be fixedly connected, also can be to be detachably connected, or it is integral；It can be mechanical connection, also can be electrical connection；It can
It is to be connected directly, also can is indirectly connected through an intermediary the phase of the connection or two elements inside two elements
Unless otherwise restricted clearly interaction relationship for the ordinary skill in the art, can manage as the case may be
Solve the concrete meaning of above-mentioned term in the present invention.Above embodiments are only to illustrate the technical solution of the utility model,
Rather than its limitations；Although the utility model is described in detail with reference to the foregoing embodiments, the ordinary skill of this field
Personnel are it is understood that it is still possible to modify the technical solutions described in the foregoing embodiments, or to part
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The spirit and scope of each embodiment technical solution of type.
Claims (3)
1. the SCR denitration device of boiler smoke, including denitration tank (1), denitration tank (1) top is connected to air inlet pipe (2),
The bottom of the denitration tank (1) is connected to air outlet pump (20), and the air outlet pump (20) is connected to escape pipe (3), described
Liquefied ammonia spray head (4) are set in denitration tank (1), it is characterised in that: denitration tank (1) internal upper part and lower part are respectively set one group
Liquefied ammonia spray head (4), laterally setting catalysis cylinder (5), the inside of the catalysis cylinder (5) between liquefied ammonia spray head (4) described in two groups
Through-hole (19) are arranged on the catalysis cylinder (5) in hollow setting, the inside catalyst filling of the catalysis cylinder (5), described
The diameter of through-hole (19) is less than the partial size of catalyst, one end of the catalysis cylinder (5) and the fixed company of the output shaft of motor (6)
It connects, the other end of the catalysis cylinder (5) and the inner wall of denitration tank (1) are rotatablely connected, and are located under the liquefied ammonia spray head (4) of one group of top
The second fan (8) are arranged in side's setting the first fan (7), the top for being located at one group of lower part liquefied ammonia spray head (4).
2. the SCR denitration device of boiler smoke according to claim 1, it is characterised in that: the denitration tank (1) passes through
Air inlet pipe (2) is connected to aspiration pump (21), and the aspiration pump (21) is connected to the top of filtering tank (9), the filtering tank
(9) three layer filtration net (10) are set in, the pore size filter of the filter screen (10) is sequentially increased from top to bottom, the filtering
Net (10) is funnel-shaped, and high-pressure water nozzle (11) are arranged in the top of filter screen described in every layer (10), the filtering tank (9)
Bottom is connected to connecting tube (12), is connected in the middle part of the connecting tube (12) with one end of drainpipe (13), the connecting tube
(12) valve (14) are set on lower part and drainpipe (13), the other end of the drainpipe (13) connects draining pump
(15)。
3. the SCR denitration device of boiler smoke according to claim 1, it is characterised in that: set on the escape pipe (3)
It sets flue gas heater (16), electric boiling plate (17) is set in the flue gas heater (16), the flue gas heater (16)
Thermometer (18) are set on escape pipe (3) between filtering tank (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821293209.1U CN208809802U (en) | 2018-08-09 | 2018-08-09 | The SCR denitration device of boiler smoke |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821293209.1U CN208809802U (en) | 2018-08-09 | 2018-08-09 | The SCR denitration device of boiler smoke |
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| Publication Number | Publication Date |
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| CN208809802U true CN208809802U (en) | 2019-05-03 |
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| CN201821293209.1U Active CN208809802U (en) | 2018-08-09 | 2018-08-09 | The SCR denitration device of boiler smoke |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110585913A (en) * | 2019-09-29 | 2019-12-20 | 冀东水泥重庆合川有限责任公司 | Cement kiln flue gas denitration process |
| CN110624348A (en) * | 2019-08-27 | 2019-12-31 | 江苏鲲鹏环保工程技术有限公司 | Environment-friendly circulating dust removal device for coal-fired power plant and dust removal process thereof |
| CN111773924A (en) * | 2020-06-22 | 2020-10-16 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Catalytic device for denitration SCR hybrid contact in diesel engine tail gas |
| CN113209739A (en) * | 2021-05-13 | 2021-08-06 | 福建晋江热电有限公司 | Flue gas denitration equipment |
| CN113350995A (en) * | 2021-07-08 | 2021-09-07 | 安徽国能亿盛环保科技有限公司 | Efficient desulfurization and denitrification flue gas purification device and implementation method thereof |
| CN114797431A (en) * | 2022-01-19 | 2022-07-29 | 上海隆麦机械设备工程有限公司 | Combined denitration device based on SNCR and SCR |
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2018
- 2018-08-09 CN CN201821293209.1U patent/CN208809802U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110624348A (en) * | 2019-08-27 | 2019-12-31 | 江苏鲲鹏环保工程技术有限公司 | Environment-friendly circulating dust removal device for coal-fired power plant and dust removal process thereof |
| CN110624348B (en) * | 2019-08-27 | 2021-05-25 | 江苏鲲鹏环保工程技术有限公司 | Environment-friendly circulating dust removal device for coal-fired power plant and dust removal process thereof |
| CN110585913A (en) * | 2019-09-29 | 2019-12-20 | 冀东水泥重庆合川有限责任公司 | Cement kiln flue gas denitration process |
| CN110585913B (en) * | 2019-09-29 | 2021-11-30 | 冀东水泥重庆合川有限责任公司 | Cement kiln flue gas denitration process |
| CN111773924A (en) * | 2020-06-22 | 2020-10-16 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Catalytic device for denitration SCR hybrid contact in diesel engine tail gas |
| CN113209739A (en) * | 2021-05-13 | 2021-08-06 | 福建晋江热电有限公司 | Flue gas denitration equipment |
| CN113350995A (en) * | 2021-07-08 | 2021-09-07 | 安徽国能亿盛环保科技有限公司 | Efficient desulfurization and denitrification flue gas purification device and implementation method thereof |
| CN114797431A (en) * | 2022-01-19 | 2022-07-29 | 上海隆麦机械设备工程有限公司 | Combined denitration device based on SNCR and SCR |
| CN114797431B (en) * | 2022-01-19 | 2023-12-12 | 上海隆麦机械设备工程有限公司 | Combined denitration device based on SNCR and SCR |
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