CN206996289U - A kind of heat-exchange integrated device of denitration - Google Patents
A kind of heat-exchange integrated device of denitration Download PDFInfo
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- CN206996289U CN206996289U CN201720839755.XU CN201720839755U CN206996289U CN 206996289 U CN206996289 U CN 206996289U CN 201720839755 U CN201720839755 U CN 201720839755U CN 206996289 U CN206996289 U CN 206996289U
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Abstract
The utility model embodiment provides a kind of heat-exchange integrated device of denitration, including SCR reactors, gas-gas heat exchanger, combustion chamber and mixing chamber；SCR reactor smoke inlets are provided with above SCR reactors, lower section is provided with SCR reactor exhanst gas outlets；SCR reactors exhanst gas outlet is connected by pipeline with the thermal fluid inlet of gas-gas heat exchanger；Fuel gas nozzle is provided with the combustion chamber；The gas fume of combustion chamber entrance is connected by pipeline with the cold fluid outlet of gas-gas heat exchanger；Ammonia-spraying grid is provided with the mixing chamber.The heat-exchange integrated device of denitration that the utility model embodiment provides, its ammonia-spraying grid is in charge of in each described spray ammonia is provided with a turbulent flow plate, flue gas can form turbulent area when flowing through the turbulent flow plate, when spraying ammonia mouth ejection ammonia source, ammonia source can be atomized into the drop of very little in this turbulent area, so that the mixed effect of ammonia source and flue gas is more preferable, and then improve denitration efficiency.
Description
Technical field
Denitration technology field is the utility model is related to, more particularly to a kind of heat-exchange integrated device of denitration.
Background technology
In the production process of the enterprises such as electric power, cement, coking, substantial amounts of flue gas can be produced, can be contained in these flue gases
Substantial amounts of nitrogen oxides, after preventing these nitrogen oxides pollution air, it is necessary to which nitrogen oxides is removed from flue gas, then will
Fume emission.
Selective catalytic reduction is the most commonly seen and maximally efficient side for removing the above-mentioned nitrogen oxides in effluent of pot
Method, it is widely used in each industrial circle.Its cardinal principle is as reducing agent, by itself and air using liquefied ammonia or ammoniacal liquor
After mixing spray into SCR (SCR) reactor upstream flue in, in the presence of catalyst with flue gas
Nitrogen oxides carries out reaction and generates harmless nitrogen and water, so as to which nitrogen oxides be removed from flue gas.Wherein ammonia and nitrogen oxidation
The mixing and distribution effect of thing is one of key factor of denitration efficiency for influenceing flue gas.
By to prior art retrieval find, Dong Xiaohong, Ni Yun《Discussion On Flue Gas Denitration Technology of Coal-buming Power Plant》(Inner Mongol
Palaeoenvironment science volume 20, the 1st phase, 2 months 2008) in describe coal fired boiler of power plant NOxThe generation way of (nitrogen oxides)
Footpath, at present domestic and international various denitration technology methods, selective catalytic reduction flue gas denitration technical characterstic and different catalysts pattern
The achievements in research such as performance comparision.It is but undesirable due to being designed in the technology ammonia-spraying grid so that the mixed effect of ammonia and flue gas
It is bad, cause denitration efficiency too low, environmental pollution is serious, the wasting of resources.
Utility model content
The utility model is directed to deficiencies of the prior art, there is provided a kind of heat-exchange integrated device of denitration, including
SCR reactors, gas-gas heat exchanger, combustion chamber and mixing chamber；
SCR reactor smoke inlets are provided with above the SCR reactors, lower section is provided with SCR reactor exhanst gas outlets；
The gas-gas heat exchanger is provided with cold fluid inlet, cold fluid outlet, thermal fluid inlet, hot fluid outlet ports；The SCR reactors
Exhanst gas outlet is connected by pipeline with the thermal fluid inlet of gas-gas heat exchanger；
The combustion chamber is provided with gas fume of combustion chamber entrance and gas fume of combustion chamber outlet；It is provided with the combustion chamber flammable
Gas nozzle；The gas fume of combustion chamber entrance is connected by pipeline with the cold fluid outlet of gas-gas heat exchanger；
The mixing chamber is provided with mixing chamber smoke inlet and mixing chamber exhanst gas outlet；Spray ammonia is provided with the mixing chamber
Grid；The mixing chamber smoke inlet is connected by pipeline with gas fume of combustion chamber outlet, and the mixing chamber exhanst gas outlet passes through pipe
Road is connected with SCR reactor smoke inlets；The ammonia-spraying grid, including：Multiple spray ammonia house stewards, the multiple spray ammonia house steward are parallel
Arrangement；Spray ammonia house steward connects with ammonia source distribution pipe；Ammonia source distribution pipe is connected by pipeline with ammonia source storage device；The spray
Ammonia house steward along its it is axially arranged have it is multiple spray ammonia be in charge of, it is described spray ammonia be in charge of one end with spray ammonia house steward connect, the other end be spray ammonia
Mouthful；It is in charge of in each described spray ammonia and is provided with a turbulent flow plate.
Alternatively, the fuel gas nozzle is prepared room with the fuel gas outside combustion chamber by pipeline and is connected；It is described
Fuel gas is prepared room and is also connected respectively by pipeline with blower fan and fuel gas storage device.
Alternatively, at least each two spray ammonia house steward connects with an ammonia source distribution pipe.
Alternatively, every four spray ammonia house stewards connect with an ammonia source distribution pipe；And ammonia source distribution pipe is perpendicular to the spray ammonia
House steward.
Alternatively, it is described spray ammonia house steward along its it is axially arranged have two row spray ammonia be in charge of；And two row spray ammonia be in charge of formed angle
Spend for 60-120 degree.
Alternatively, the two row spray ammonia is in charge of, and a row spray ammonia, which is in charge of, to be sprayed ammonia relative to another row and is in charge of interval setting.
Alternatively, the spray ammonia is in charge of is perpendicularly fixed at the spray total pipe surface of ammonia along its length.
Alternatively, the plane of the turbulent flow plate is in charge of perpendicular to the spray ammonia.
Alternatively, the plane of the turbulent flow plate is rectangle.
Alternatively, the plane of the turbulent flow plate is in charge of Central Symmetry relative to the spray ammonia.
The heat-exchange integrated device of denitration that the utility model embodiment provides, its ammonia-spraying grid is in each spray ammonia point
A turbulent flow plate is provided with pipe, flue gas can form turbulent area when flowing through the turbulent flow plate, when spraying ammonia mouth ejection ammonia source, ammonia source
The drop of very little can be atomized into this turbulent area, so that the mixed effect of ammonia source and flue gas is more preferable, and then improves denitration effect
Rate.
Further, the heat-exchange integrated device of denitration provided by the utility model, gas is used as using the flue gas after denitration process
The hot fluid of gas heat exchanger, with cold fluid, that is, treat that the flue gas of denitration process carries out heat exchange, to treat the flue gas of denitration process
Heating；The heat recycling to the flue gas after denitration process is realized, has saved the denitration cost of flue gas.
Moreover, by by SCR reactors and gas-gas heat exchanger integration, can be with the occupation of land face of effectively save device
Product.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of heat-exchange integrated apparatus structure schematic diagram of denitration provided by the utility model；
Fig. 2 is the ammonia-spraying grid structural representation in the heat-exchange integrated device of denitration provided by the utility model.
Fig. 3 is the ammonia-spraying grid structural representation on first direction in Fig. 2.
Fig. 4 is the enlarged drawing of the part A in Fig. 2.
Fig. 5 is meaning diagram in flow field in Fig. 4.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
As Figure 1-4, the utility model provides the heat-exchange integrated device of denitration, including SCR reactors 1, gas gas change
Hot device 3, combustion chamber 4 and mixing chamber 5；
The top of SCR reactors 1 is provided with SCR reactor smoke inlets, and lower section is provided with SCR reactor flue gases and gone out
Mouthful；The gas-gas heat exchanger 3 is provided with cold fluid inlet, cold fluid outlet, thermal fluid inlet, hot fluid outlet ports；The SCR is anti-
Device exhanst gas outlet is answered to be connected by pipeline with the thermal fluid inlet of gas-gas heat exchanger 3；
The combustion chamber 4 is provided with gas fume of combustion chamber entrance and gas fume of combustion chamber outlet；Being provided with the combustion chamber 4 can
Fire gas nozzle 6；The gas fume of combustion chamber entrance is connected by pipeline with the cold fluid outlet of gas-gas heat exchanger 3；
The mixing chamber sets 5 and is equipped with mixing chamber smoke inlet and mixing chamber exhanst gas outlet；Spray is provided with the mixing chamber
Ammonia grid 2；The mixing chamber smoke inlet is connected by pipeline with gas fume of combustion chamber outlet, and the mixing chamber exhanst gas outlet passes through
Pipeline is connected with SCR reactor smoke inlets；The ammonia-spraying grid 2 includes：Multiple spray ammonia house stewards 22, the multiple spray ammonia house steward
22 is arranged in parallel；Spray ammonia house steward 22 connects with ammonia source distribution pipe 21；Ammonia source distribution pipe 21 is filled by pipeline and the storage of ammonia source
Put (not shown) connection；The spray ammonia house steward 22 along its it is axially arranged there are multiple spray ammonia to be in charge of 23, the spray ammonia is in charge of 23
One end connects with spray ammonia house steward 22, and the other end is spray ammonia mouth；It is in charge of in each described spray ammonia on 23 and is provided with a turbulent flow
Plate 25.
It is understood that the SCR inside reactors in the utility model include SCR catalyst layer；Used SCR
Catalyst can select SCR catalyst commonly used in the art, and the utility model is herein without limiting.
Gas-gas heat exchanger in the utility model embodiment can use the conventional gas-gas heat exchanger in this area, therefore, this
Utility model is at this to gas-gas heat exchanger without limiting.In the utility model specific implementation process, SCR reactors 1 are located at
The top of gas-gas heat exchanger 3.
In actual applications, treat that the flue gas of denitration process enters the utility model from the cold fluid inlet of gas-gas heat exchanger
The heat-exchange integrated device of denitration in handled, last being changed from gas gas from the heat-exchange integrated device of denitration of the flue gas after processing
The hot fluid outlet ports discharge of hot device, and enter follow-up processing is carried out in miscellaneous equipment as needed, such as the cigarette after processing
Gas can enter back into other gas-liquid heat-exchanges the further recovery for carrying out heat, then be drained into air by chimney
In.The temperature of flue gas is higher during due to carrying out SCR denitration, and the temperature of pending flue gas is relatively low；Therefore needing will be pending
Flue gas heated up, its temperature is reached the temperature for being appropriate to SCR denitration；On the other hand, the flue gas temperature after SCR denitration
Degree is higher, if without recycling, can cause the waste of the energy.Based on this, the utility model is designed SCR denitration
Flue gas after processing is preheated to pending flue gas, the heat of the flue gas after on the one hand can recycling, the opposing party
Face can also save follow-up other Smoke-heating devices, such as combustion chamber is used for the heat to flue gas.
In specific implementation process, the size of combustion chamber 4, shape etc. can be by those skilled in the art according to the de- of reality
Nitre is needed to determine, its internal fuel gas nozzle 6 can be realized using prior art, as long as the energy of fuel gas nozzle 6
It is enough that fuel gas is lighted in combustion chamber and makes gas fuel burning, for being heated to flue gas.Fuel gas
Concrete form the utility model of nozzle 6 is herein without limiting.Similarly, the particular number of fuel gas nozzle 6, can be by ability
Field technique personnel according to reality fume treatment it needs to be determined that, the utility model herein without limit.
In addition, continue as shown in figure 1, in specific implementation process, fuel gas nozzle 6 by pipeline and combustion chamber 4 outside
Fuel gas prepare room 61 be connected；The fuel gas prepares room 61 and also passes through pipeline and blower fan 62 and fuel gas respectively
Storage device (not shown) is connected.In actual applications, can be according to denitrification integrated device provided by the utility model
Concrete application scene select suitable fuel gas, it is for instance possible to use coke-stove gas is as fuel gas.Can gas
Prepare in room 61, the fuel gas from fuel gas storage device mixes with by the introduced air of blower fan 62 so that can
Combustion gas body, which reaches, to be then sent to clean-burning state by pipeline to fuel gas nozzle 6, and in fuel gas nozzle
Light and burn at 6.
It should be noted that the ammonia-spraying grid 2 shown in Fig. 1, only represents and ammonia-spraying grid 2 is provided with mixing chamber 5,
The practical structures of ammonia-spraying grid 2 are not represented, the structure of ammonia-spraying grid 2 provided by the utility model also should refer to Fig. 2-4 institutes
Show.
In a kind of embodiment of the present utility model, spray ammonia house steward 22 can select hollow and closed at both ends circle
Column tube.Quantity for spraying ammonia house steward 22, the utility model is herein without limiting.Those skilled in the art can be according to reality
Border is needed to determine.
In the utility model, the one end of ammonia source distribution pipe 21 connects with spray ammonia house steward, can specifically pass through pipeline and spray ammonia
House steward connects；Connected with the other end with ammonia source storage device, specifically can be by pipeline (the ammonia source that is connected with ammonia source storage device
Conveyance conduit) connected with ammonia source storage device.Ammonia source employed in the utility model is preferably ammoniacal liquor；Certainly as needed,
It can also be ammonia or liquefied ammonia, can specifically be determined according to being actually needed, the utility model is herein without limiting.Described
Ammonia source storage device, the conventional equipment of this area according to the concrete form in ammonia source, can be selected to realize, the utility model is herein
Without limiting.
In specific implementation process, multiple spray ammonia house stewards 22 can be allowed to share a distribution pipe 21；Specifically, can allow to
Few each two spray ammonia house steward 22 connects with an ammonia source distribution pipe 21.More specifically, as shown in Fig. 2 can be with every four spray ammonia
House steward 22 connects with an ammonia source distribution pipe 21；And ammonia source distribution pipe 21 is perpendicular to the spray ammonia house steward 22.
In order that the mixed effect for obtaining ammonia and nitrogen oxides is more preferable, in a kind of embodiment of the present utility model,
The spray ammonia house steward 22 axially arranged has two row spray ammonia to be in charge of 23 along its；And two row spray ammonia to be in charge of 23 angulations be 60-120
Degree.Described spray ammonia, which is in charge of 23, can specifically use hollow cylindrical tube, the cylindrical tube both ends open, the opening of its one end
It is in charge of 22 with spray ammonia to be connected, the opening of the other end can be used as spray ammonia mouth.It will be apparent that adopted when spray ammonia house steward is in charge of with spray ammonia
During with cylindrical tube, the diameter of spray ammonia house steward 22 is greater than the diameter that spray ammonia is in charge of 23.For spray ammonia house steward 22 and spray ammonia point
Diameter, length and the quantity of pipe 23, those skilled in the art can according to being actually needed, such as amount of processing flue gas etc. come it is true
Fixed, the utility model is herein without limiting.
Preferably, the two row spray ammonia is in charge of, and a row spray ammonia, which is in charge of, to be sprayed ammonia relative to another row and is in charge of interval setting.Tool
Each spray ammonia that body can be understood as during row spray ammonia is in charge of, which is in charge of, to be in charge of adjacent another row spray ammonia with the spray ammonia and is in charge of two
Individual spray ammonia is in charge of interval setting；The spray ammonia that described interval setting can be understood as during row spray ammonia is in charge of is in charge of in target
Projection in plane, it is in charge of the projection on objective plane being in charge of adjacent another row spray ammonia with the spray ammonia and being in charge of two spray ammonia
Between.The objective plane refers to the symmetrical plane that two row spray ammonia is in charge of.
In a kind of embodiment of the present utility model, spray ammonia, which is in charge of 23, can be perpendicularly fixed at spray along its length
The surface of ammonia house steward 22.
Inventor has found, as shown in figure 5, being provided with a turbulent flow plate by being in charge of in each described spray ammonia on 23
25, turbulent area can be formed when flue gas 26 flows through turbulent flow plate 25, the ammonia source 24 and flue gas 26 in the turbulent area can reach turbulence-like
State, and ammonia source 24 can be atomized into the drop of very little in this turbulent area, so that the mixed effect of ammonia source 24 and flue gas 26 is more
It is good.Preferably, the plane of turbulent flow plate 25 is in charge of 23 perpendicular to the spray ammonia.In specific implementation process, a rectangle can be selected
Plate and by it is described spray ammonia be in charge of 23 passed through from its plate face and by weld etc. technology both are fixed.It is highly preferred that the rapids
The plane of flowing plate 25 is in charge of 23 Central Symmetries relative to the spray ammonia.Specifically, the size of turbulent flow plate 25 and the edge of turbulent flow plate 25
Spray ammonia is in charge of the positions of 23 axial directions, can be by those skilled in the art according to being actually needed, such as ammonia source 24 and flue gas 26 is mixed
Effect is closed to determine, the utility model is herein without limiting.
Preferred embodiment of the present utility model is the foregoing is only, is not intended to limit protection model of the present utility model
Enclose.All made within spirit of the present utility model and principle any modification, equivalent substitution and improvements etc., are all contained in this reality
With in new protection domain.
Claims (10)
1. a kind of heat-exchange integrated device of denitration, it is characterised in that including SCR reactors, gas-gas heat exchanger, combustion chamber and mixing
Room；
SCR reactor smoke inlets are provided with above the SCR reactors, lower section is provided with SCR reactor exhanst gas outlets；It is described
Gas-gas heat exchanger is provided with cold fluid inlet, cold fluid outlet, thermal fluid inlet, hot fluid outlet ports；The SCR reactors flue gas
Outlet is connected by pipeline with the thermal fluid inlet of gas-gas heat exchanger；
The combustion chamber is provided with gas fume of combustion chamber entrance and gas fume of combustion chamber outlet；Fuel gas is provided with the combustion chamber
Nozzle；The gas fume of combustion chamber entrance is connected by pipeline with the cold fluid outlet of gas-gas heat exchanger；
The mixing chamber is provided with mixing chamber smoke inlet and mixing chamber exhanst gas outlet；Spray ammonia lattice are provided with the mixing chamber
Grid；The mixing chamber smoke inlet is connected by pipeline with gas fume of combustion chamber outlet, and the mixing chamber exhanst gas outlet passes through pipeline
It is connected with SCR reactor smoke inlets；The ammonia-spraying grid, including：Multiple spray ammonia house stewards, the multiple spray ammonia house steward's parallel
Row；Spray ammonia house steward connects with ammonia source distribution pipe；Ammonia source distribution pipe is connected by pipeline with ammonia source storage device；The spray ammonia
House steward along its it is axially arranged have it is multiple spray ammonia be in charge of, it is described spray ammonia be in charge of one end with spray ammonia house steward connect, the other end be spray ammonia mouth；
It is in charge of in each described spray ammonia and is provided with a turbulent flow plate.
2. device as claimed in claim 1, it is characterised in that the fuel gas nozzle by outside pipeline and combustion chamber can
Combustion gas body is prepared room and is connected；The fuel gas prepares room and also passes through pipeline and blower fan and fuel gas storage device phase respectively
Even.
3. device as claimed in claim 1, it is characterised in that the SCR reactors are located above gas-gas heat exchanger.
4. device as claimed in claim 1, it is characterised in that at least each two spray ammonia house steward connects with an ammonia source distribution pipe
It is logical.
5. device as claimed in claim 1, it is characterised in that the spray ammonia house steward axially arranged has two row spray ammonia point along its
Pipe；And two row spray ammonia to be in charge of angulation be 60-120 degree.
6. device as claimed in claim 5, it is characterised in that the two row spray ammonia is in charge of, a row spray ammonia be in charge of relative to
Another row spray ammonia is in charge of interval setting.
7. device as claimed in claim 1, it is characterised in that it is described spray ammonia be in charge of be perpendicularly fixed at along its length spray ammonia it is total
Pipe surface.
8. such as the device any one of claim 1-7, it is characterised in that the plane of the turbulent flow plate is perpendicular to the spray
Ammonia is in charge of.
9. device as claimed in claim 8, it is characterised in that the plane of the turbulent flow plate is rectangle.
10. device as claimed in claim 9, it is characterised in that during the plane of the turbulent flow plate is in charge of relative to the spray ammonia
The heart is symmetrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720839755.XU CN206996289U (en) | 2017-07-12 | 2017-07-12 | A kind of heat-exchange integrated device of denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720839755.XU CN206996289U (en) | 2017-07-12 | 2017-07-12 | A kind of heat-exchange integrated device of denitration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206996289U true CN206996289U (en) | 2018-02-13 |
Family
ID=61453142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720839755.XU Active CN206996289U (en) | 2017-07-12 | 2017-07-12 | A kind of heat-exchange integrated device of denitration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206996289U (en) |
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2017
- 2017-07-12 CN CN201720839755.XU patent/CN206996289U/en active Active
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