CN207237675U - Urea liquid gasification installation for power-plant flue gas denitration - Google Patents
Urea liquid gasification installation for power-plant flue gas denitration Download PDFInfo
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- CN207237675U CN207237675U CN201721079506.1U CN201721079506U CN207237675U CN 207237675 U CN207237675 U CN 207237675U CN 201721079506 U CN201721079506 U CN 201721079506U CN 207237675 U CN207237675 U CN 207237675U
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- vaporizer
- hot wind
- urea
- flue gas
- gasification installation
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Abstract
Urea liquid gasification installation provided by the utility model for power-plant flue gas denitration, including vaporizer, with the side wall through vaporizer by extending to its internal urea atomizing component outside vaporizer, the both ends of vaporizer connect hot wind diffuser casing and also Primordial Qi collecting chamber respectively, the one end of the hot wind diffuser casing away from the vaporizer forms hot wind inlet, and the also one end of Primordial Qi collecting chamber away from the vaporizer forms reducing agent outlet；Hot wind diffuser casing gradually increases from the hot wind inlet to one end internal diameter being connected with the vaporizer；Also Primordial Qi collecting chamber is gradually reduced from one end that the vaporizer is connected to the reducing agent exit inside diameter.Urea liquid is first atomized to form droplet penetrating vaporizer through urea atomizing component, then pyrolysis forms ammonia under the action of hot wind, the hot wind diffuser casing internal diameter gradually increases, so that the mitigation that the wind speed of hot wind gradually successively decreases and becomes, be conducive to prevent from crystallizing so as to improve the gasification efficiency of drop with the drop contact of atomization.
Description
Technical field
It the utility model is related to gas denitrifying technology field, and in particular to a kind of urea liquid for power-plant flue gas denitration
Gasification installation.
Background technology
Thermal power plant generates electricity to make to produce the largely exhaust gas containing sulphur and nitre, these exhaust gas in the coal of burning and is discharged into air and can produce
Pollution forms acid rain.Therefore, in order to avoid atmosphere pollution, protect living environment, it is necessary to take corresponding desulphurization and denitration method with
Remove the sulfur and nitrogen oxides (NOX) in removing exhaust gas.Wherein, nitrogen oxides mainly includes N2O、NO、N2O3、NO2、N2O4、
N2O5Etc. compound, the generation form of NOX has three kinds of burning type, temperature mode and fast temperature type, wherein thermal NO X, is air
In nitrogen aoxidize and generate at high temperature, Quick-type NOX be burning when air in nitrogen and fuel in ionic hydrocarbon group
As the reactions such as HC generate, burning type NOX is that the nitrogen compound contained in fuel thermally decomposes and then oxygen in combustion
Change and generate.The NOX of above-mentioned three types.Its respective growing amount is related with burning of coal temperature, is fired in boiler of power plant
Burning type NOX is most important, and secondly, Quick-type is minimum for heating power type.
The Treatment process of NOX can be divided into three kinds of the post processing of the pre-treatment of burning, the improvement of combustion system and burning, its
In, the method for post-processing the flue gas containing NOX namely produced to burning and being handled of burning, i.e. denitrating flue gas, in the world
The technique for comparing mainstream is divided into SCR technology (SCR) and selective non-catalytic reduction technology (SNCR), selectivity
Noncatalytic reduction is a kind of without using catalyst, the method that NOx is reduced in 850~1100 DEG C of temperature ranges.Selectivity is urged
The principle for changing reduction method is under catalyst action, and NO and NO2 are selectively reduced into N2 by reducing agent at 290-400 DEG C,
And the oxidation reaction of NH3 and O2 hardly occurs, so as to improve the selectivity of N2, reduce the consumption of NH3.It can be seen from the above that
Either SCR or SNCR technologies are required to use reducing agent, and reducing agent of the ammonia as nitrogen oxides, generally there is three kinds of ways
, that is, there are urea, liquefied ammonia and ammonium hydroxide in footpath, and ammonium hydroxide safe class is relatively low, but transport and storage facilities volume are larger, while ammonium hydroxide vaporizes
Need to consume substantial amounts of energy consumption, equipment initial outlay and operating cost are higher；Liquefied ammonia technique is simple, and initial outlay is few, but it is pacified
Congruent level is more demanding.Urea because no safe class requires, storage and the advantages that convenient transportation as power plant's denitration it is main and also
Former agent, when acting on reducing agent using urea, a kind of is that urea liquid is directly sprayed onto boiler internal in the form of atomized drop, its
The atomizing effect of urea liquid directly affects the effect of denitration, therefore, is proposed in the prior art to improve its denitration effect
Many improvement improve its mixed effect with boiler smoke to promote the atomization of drop.Obviously, ammonia and pot are sprayed to boiler internal
The mixed effect of kiln gas is better than urea atomized drop and the mixed effect of boiler smoke, therefore most of techniques are to utilize at present
Pyrolysis oven carries out urea liquid pyrolysis and forms ammonia being then sprayed into boiler internal, but due to pyrolysis chamber's interior flow field in pyrolysis oven
The problems such as design problem, poor urea spray gun atomizing effect, cause pyrolysis oven afterbody urea crystals, influence denitrating system sometimes
Normal operation.
Utility model content
Therefore, the technical problems to be solved in the utility model be to overcome in the prior art pyrolysis oven afterbody urea easily crystallize
The problem of, so as to provide a kind of urea liquid gasification installation.
For this reason, the technical solution that the application takes is：
A kind of urea liquid gasification installation for power-plant flue gas denitration, including vaporizer, and through the vaporizer
Side wall is connected respectively by extending to the urea atomizing component inside the vaporizer, the both ends of the vaporizer outside the vaporizer
Hot wind diffuser casing and also Primordial Qi collecting chamber are connect, the one end of the hot wind diffuser casing away from the vaporizer forms hot wind inlet, institute
State the also one end of Primordial Qi collecting chamber away from the vaporizer and form reducing agent outlet；The hot wind diffuser casing is from the hot wind inlet
Gradually increase to one end internal diameter being connected with the vaporizer；The Primordial Qi collecting chamber of going back is from the one end being connected with the vaporizer
It is gradually reduced to the reducing agent exit inside diameter.
Preferably, the urea liquid gasification installation for power-plant flue gas denitration, if the hot wind diffuser casing includes
Hot dry wind diffuser, axially symmetric distribution of the hot wind diffuser along the hot wind diffuser casing, and along hot wind flow direction institute
Hot wind diffusion bore is stated gradually to increase.
Preferably, the urea liquid gasification installation for power-plant flue gas denitration, the urea atomizing component include,
Urea delivery pipe, through the vaporizer side wall by being extended to outside the vaporizer inside the vaporizer；Nozzle, is set
It is located in the urea delivery pipe on the pipeline section inside the vaporizer；Compressed gas tube, is arranged at the urea delivery pipe position
On pipeline section outside the vaporizer.
Preferably, the urea liquid gasification installation for power-plant flue gas denitration, the urea atomizing component are set
In the vaporizer close to one end of the hot wind diffuser casing.
Preferably, the urea liquid gasification installation for power-plant flue gas denitration, also sets up at the hot wind inlet
There is temperature measurement component.
Preferably, the urea liquid gasification installation for power-plant flue gas denitration, on the side wall of the vaporizer also
It is provided with manometric module and temperature measurement component.
Preferably, the urea liquid gasification installation for power-plant flue gas denitration, the urea liquid gasification installation
It is additionally provided with fixing device.
Preferably, the urea liquid gasification installation for power-plant flue gas denitration, the urea atomizing component is along institute
Several are distributed with the perisporium for stating vaporizer.
Preferably, the urea liquid gasification installation for power-plant flue gas denitration, the vaporizer are cylindrical shape, if
The urea atomizing component is done to be evenly distributed on same circumference.
Preferably, the urea liquid gasification installation for power-plant flue gas denitration, the urea atomizing component are mist
Change spray gun.
Technical solutions of the utility model, have the following advantages that：
1. the urea liquid gasification installation provided by the utility model for power-plant flue gas denitration, including vaporizer, and wear
The side wall of the vaporizer is crossed by extending to the urea atomizing component inside the vaporizer, the gasification outside the vaporizer
The both ends of room connect hot wind diffuser casing and also Primordial Qi collecting chamber, one end shape of the hot wind diffuser casing away from the vaporizer respectively
Into hot wind inlet, the described one end of also Primordial Qi collecting chamber away from the vaporizer forms reducing agent outlet；The hot wind diffuser casing
Gradually increase from the hot wind inlet to one end internal diameter being connected with the vaporizer；It is described also Primordial Qi collecting chamber from the gas
One end to the reducing agent exit inside diameter for changing room connection is gradually reduced.Wherein, urea liquid is first atomized through urea atomizing component
Form droplet and spray into vaporizer, then pyrolysis forms ammonia under the action of hot wind, and the hot wind diffuser casing internal diameter gradually increases
Greatly so that the mitigation that the wind speed of hot wind gradually successively decreases and becomes, is conducive to the drop contact of atomization so as to improve the gasification of drop
Efficiency, prevents from crystallizing.
2. the urea liquid gasification installation provided by the utility model for power-plant flue gas denitration, the hot wind diffuser casing bag
If including hot dry wind diffuser, axially symmetric distribution of the hot wind diffuser along the hot wind diffuser casing, and along hot wind flow side
Gradually increase to hot wind diffusion bore, in the case where ensuring that wind speed relaxes, make cloth wind more uniform, further improve
Gasification efficiency.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical solution of the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, describe below
In attached drawing be the utility model some embodiments, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is a kind of urea liquid gasification installation for power-plant flue gas denitration of the utility model；
Fig. 2 is that the utility model is used for a kind of knot of hot wind diffuser casing in the urea liquid gasification installation of power-plant flue gas denitration
Structure schematic diagram.
Wherein, reference numeral is,
1- vaporizers, 2- hot wind diffuser casings, 21- hot wind inlets, 22- hot wind diffusers, 3- also Primordial Qi collecting chambers, 31- is also
Former agent outlet, 4- urea delivery pipes, 5- nozzles, 6- compressed gas tubes, 7- temperature measurement components, 8- manometric modules, 9- fixing devices.
Embodiment
As shown in Figure 1, the utility model is carried from a kind of urea liquid gasification installation for power-plant flue gas denitration, including
Vaporizer 1, and be atomized through the side wall of the vaporizer by extending to the urea inside the vaporizer outside the vaporizer
Component, wherein, the both ends of the vaporizer 1 connect hot wind diffuser casing 2 and also Primordial Qi collecting chamber 3, the hot wind diffuser casing 2 respectively
One end away from the vaporizer 1 forms hot wind inlet 21, the also one end shape of the Primordial Qi collecting chamber 3 away from the vaporizer 1
Into reducing agent outlet 31；The hot wind diffuser casing 2 from the hot wind inlet 21 to one end internal diameter being connected with the vaporizer by
It is cumulative big；The also Primordial Qi collecting chamber 3 gradually subtracts from 31 internal diameters of one end that the vaporizer is connected to reducing agent outlet
It is small.
On the practice processes of aforesaid way, if the hot wind diffuser casing 2 includes hot dry wind diffuser 22, the hot wind expands
Axially symmetric distribution of the separate tube 22 along the hot wind diffuser casing 2, and it is gradual along hot wind diffusion bore described in hot wind flow direction
Increase (as shown in Figure 2).In the present embodiment, hot wind diffuser is 21, in other embodiments, could be provided as it
Its number, can be preferably 20-35 as long as its function can be realized.
On the practice processes of aforesaid way, the urea atomizing component includes, urea delivery pipe 4, through the gasification
The side wall of room 1 outside the vaporizer 1 by extending to inside the vaporizer；Nozzle 5, is arranged at the urea delivery pipe and is located at
On pipeline section inside the vaporizer；Compressed gas tube 6, is arranged at the pipe that the urea delivery pipe is located at outside the vaporizer
Duan Shang.
On the practice processes of aforesaid way, the urea atomizing component is arranged at the vaporizer and expands close to the hot wind
One end of room 2 is dissipated, to extend the time of contact of atomized drop and hot wind, improves gasification result.
On the practice processes of aforesaid way, manometric module 8 and temperature measurement component are additionally provided with the side wall of the vaporizer
7；Temperature measurement component 7 is additionally provided with the hot wind inlet.In the present embodiment, manometric module is pressure transmitter, thermometric group
Part is thermocouple.
On the practice processes of aforesaid way, the urea liquid gasification installation is additionally provided with fixing device 9, to realize this
The fixation of urea liquid gasification installation in application.
On the practice processes of aforesaid way, to improve the amount of gasification ammonia, the urea atomizing component is along the gasification
Several are distributed with the perisporium of room.
On the practice processes of aforesaid way, the vaporizer is cylindrical shape, and some urea atomizing components uniformly divide
Cloth is on same circumference, and in the present embodiment, urea atomizing component is arranged to 8, in other embodiments, can also set
Other numbers are set to, preferably 8-15 is a.
As alternative embodiment, the urea atomizing component is atomizing lance.
The operation principle of urea liquid gasification installation described in the utility model is that the hot wind by heater heating is through overheat
Wind inlet enters the hot wind diffuser inside hot wind diffuser casing, is diffused into up to vaporizer.At the same time, urea liquid is defeated from urea
Pipe is sent to enter, compressed air enters from compressed gas tube, and under the action of compressed air, urea liquid is sprayed by nozzle and is in
Spray pattern.The urea droplet of atomization is decomposed into ammonia, ammonia warp from the hot wind that hot wind diffuser comes out in vaporizer
Cross also Primordial Qi collecting chamber and reach reducing agent outlet, the ammonia for exporting out from reducing agent is used for denitrification reducing agent.
Obviously, the above embodiments are merely examples for clarifying the description, and the restriction not to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the scope of protection of the utility model.
Claims (9)
1. a kind of urea liquid gasification installation for power-plant flue gas denitration, including vaporizer (1), and through the vaporizer
Side wall is by extending to the urea atomizing component inside the vaporizer outside the vaporizer, it is characterised in that
The both ends of the vaporizer (1) connect hot wind diffuser casing (2) and also Primordial Qi collecting chamber (3), the hot wind diffuser casing respectively
(2) one end away from the vaporizer (1) forms hot wind inlet (21), and the also Primordial Qi collecting chamber (3) is away from the vaporizer
(1) one end forms reducing agent outlet (31)；
The hot wind diffuser casing (2) gradually increases from the hot wind inlet (21) to one end internal diameter being connected with the vaporizer；
The also Primordial Qi collecting chamber (3) gradually subtracts from exporting (31) internal diameter with one end that the vaporizer is connected to the reducing agent
It is small.
2. the urea liquid gasification installation according to claim 1 for power-plant flue gas denitration, it is characterised in that
The hot wind diffuser casing (2) if including hot dry wind diffuser (22), along the hot wind spread by the hot wind diffuser (22)
The axially symmetric distribution of room (2), and gradually increase along hot wind diffusion bore described in hot wind flow direction.
3. the urea liquid gasification installation according to claim 1 or 2 for power-plant flue gas denitration, it is characterised in that institute
Stating urea atomizing component includes,
Urea delivery pipe (4), the side wall through the vaporizer (1) extend to the vaporizer by the vaporizer (1) is exterior
It is internal；
Nozzle (5), is arranged on the pipeline section that the urea delivery pipe is located inside the vaporizer；
Compressed gas tube (6), is arranged on the pipeline section that the urea delivery pipe is located at outside the vaporizer.
4. the urea liquid gasification installation according to claim 3 for power-plant flue gas denitration, it is characterised in that the urine
Plain atomizing component is arranged at the vaporizer close to one end of the hot wind diffuser casing (2).
5. the urea liquid gasification installation according to claim 4 for power-plant flue gas denitration, it is characterised in that
Manometric module (8) and temperature measurement component (7) are additionally provided with the side wall of the vaporizer；
Temperature measurement component (7) is additionally provided with the hot wind inlet.
6. the urea liquid gasification installation according to claim 4 or 5 for power-plant flue gas denitration, it is characterised in that institute
State urea liquid gasification installation and be additionally provided with fixing device (9).
7. the urea liquid gasification installation according to claim 6 for power-plant flue gas denitration, it is characterised in that the urine
Several are distributed with along the perisporium of the vaporizer in plain atomizing component.
8. the urea liquid gasification installation according to claim 7 for power-plant flue gas denitration, it is characterised in that the gas
Change room is cylindrical shape, and some urea atomizing components are evenly distributed on same circumference.
9. the urea liquid gasification installation according to claim 1 or 2 for power-plant flue gas denitration, it is characterised in that institute
It is atomizing lance to state urea atomizing component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721079506.1U CN207237675U (en) | 2017-08-18 | 2017-08-18 | Urea liquid gasification installation for power-plant flue gas denitration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721079506.1U CN207237675U (en) | 2017-08-18 | 2017-08-18 | Urea liquid gasification installation for power-plant flue gas denitration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207237675U true CN207237675U (en) | 2018-04-17 |
Family
ID=61883488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721079506.1U Expired - Fee Related CN207237675U (en) | 2017-08-18 | 2017-08-18 | Urea liquid gasification installation for power-plant flue gas denitration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207237675U (en) |
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2017
- 2017-08-18 CN CN201721079506.1U patent/CN207237675U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180417 Termination date: 20180818 |