CN207929004U - A kind of denitrification apparatus for power plant - Google Patents
A kind of denitrification apparatus for power plant Download PDFInfo
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- CN207929004U CN207929004U CN201721818372.0U CN201721818372U CN207929004U CN 207929004 U CN207929004 U CN 207929004U CN 201721818372 U CN201721818372 U CN 201721818372U CN 207929004 U CN207929004 U CN 207929004U
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- power plant
- compressed air
- import
- catalytic reactor
- mixing duct
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Abstract
The utility model discloses a kind of denitrification apparatus for power plant, including urea storage tank, multi-fluid injection apparatus, mixing duct, catalytic reactor and with the escaping of ammonia control room.Multi-fluid injection apparatus is equipped with urea solution import and compressed air inlet, and urea solution import is connected to by the first delivery pipe with urea storage tank, and the first delivery pipe is equipped with peristaltic pump, and compressed air inlet is connected to compressed air source.Mixing duct is equipped with the high-temperature flue gas import being connect with smoke discharging pipe, the reducing agent import being connect with multi-fluid injection apparatus and the fluid-mixing outlet being connect with catalytic reactor import, and the outlet of catalytic reactor is connect with the escaping of ammonia control room；Further include control system, smoke discharging pipe is being equipped with temperature sensor, flow sensor and NOx concentration detector at high-temperature flue gas import, control system respectively with temperature sensor, flow sensor, NOx concentration detector and peristaltic pump connection communication.The utility model is simple in structure, denitration efficiency is high.
Description
Technical field
The utility model is related to power plant's denitration technology field more particularly to a kind of denitrification apparatus for power plant.
Background technology
Contain a large amount of nitrogen oxides in the high-temperature flue gas of power plant discharge, nature ring is given in the discharge of this part nitrogen oxides
Border and human lives bring serious harm.If nitrogen oxides can be such that human body hemochrome nitrifies, cause respiratory inflammation.Nitrogen oxygen
Compound is one of the main reason for forming acid rain, acid mist, and nitrogen oxides has also assisted in the destruction of ozone layer, therefore, nitrogen oxides
Have become the big public hazards of one be set as now, is influenced caused by atmospheric environment to control and reduce it, country and local ring
There is clear, enforceable discharge standard in border protection department to the discharge of nitrogen oxides in industrial production waste gas.Currently, both at home and abroad
The removing process of a variety of nitrogen oxides, the main selective noncatalytic reduction of denitrating technique (SNCR) and choosing are developed
Selecting property catalytic reduction method (SCR).In comparison, its denitration efficiency of existing denitration device is all relatively low, and generally 50% is left
The right side, initial outlay is big, therefore, is badly in need of a kind of equipment that can mention denitration efficiency.
Utility model content
The technical problem to be solved by the present invention is to provide a kind of taking off for power plant simple in structure, denitration efficiency is high
Nitre device.
In order to solve the above-mentioned technical problem, the utility model provides a kind of denitrification apparatus for power plant, including urea
Storage tank, multi-fluid injection apparatus, mixing duct, catalytic reactor and the escaping of ammonia control room are set on the multi-fluid injection apparatus
There are urea solution import and compressed air inlet, the urea solution import to be connected to the urea storage tank by the first delivery pipe, institute
It states the first delivery pipe and is equipped with peristaltic pump, the compressed air inlet is connected to a compressed air source, is used for the multi-fluid
Compressed air is sent into injection apparatus；The mixing duct is equipped with high-temperature flue gas import, reducing agent import and fluid-mixing row
The smoke discharging pipe of outlet, the high-temperature flue gas import and power plant connects, the reducing agent import and the multi-fluid injection apparatus
Jet exit connection, the fluid-mixing outlet connect with the import of the catalytic reactor, the high-temperature flue gas with and also
Former agent mixed in the mixing duct after enter the catalytic reactor in reacts, the outlet of the catalytic reactor with it is described
The escaping of ammonia control room connects, and the escaping of ammonia control room is for handling unreacted NH in the catalytic reactor3；It further include control
System processed, the smoke discharging pipe are being equipped with temperature sensor, flow sensor and NOx concentration at the high-temperature flue gas import
Detector, the control system are connect with the temperature sensor, flow sensor, NOx concentration detector and peristaltic pump respectively
Communication.
Further, it connects between the peristaltic pump and the urea storage tank and is equipped with first filter and the second filter.
Further, the pipeline that the compressed air inlet is connected to compressed air source is equipped with regulator, the tune
Pressure device and the control system connection communication.
Further, in the mixing duct baffle plate is equipped with along fluid flow direction interval.
Further, what is be spaced in the mixing duct is equipped with 3 baffle plates, wherein there are two the baffle plates to be arranged
In mixing duct inside upper part, there are one the baffle plates to be arranged in mixing duct lower inside.
Further, the pressure of the compressed air is 2~3MPa.
Further, expansion joint is equipped between the mixing duct and the catalytic reactor.
Further, it is provided in the escaping of ammonia control room and enters in the escaping of ammonia control indoor gas for aoxidizing
NH3Catalyst bed.
A kind of denitrification apparatus for power plant of the utility model, has the advantages that：
(1) denitrification apparatus for power plant of the utility model, first by the urea solution and high-temperature flue gas as reducing agent
It is sufficiently mixed to be re-fed into catalytic reactor in mixing duct first and carries out selective catalytic reduction, due to reducing agent and high temperature
Flue gas is sufficiently mixed, so that the nitrogen oxides in high-temperature flue gas can be contacted more fully with reducing agent, is conducive to carry
The transformation efficiency of high nitrogen oxides.
(2) device is equipped with temperature sensor, flow sensor and NOx concentration detector at high-temperature flue gas import, and
Temperature sensor, flow sensor, NOx concentration detector and the peristaltic pump that is arranged on urea solution conveyance conduit are with control
System connection communication, so as to control the emitted dose of urea well so that the emitted dose of urea is discharged with high-temperature flue gas
Change and change, by the lasting monitoring to NOx concentration, control system can continue to adjust the emitted dose of urea solution, allow more
NOx is restored, and improves the conversion ratio of nitrogen oxides in effluent.
(3) the utility model is equipped with the escaping of ammonia control room after catalytic reactor, will be catalyzed by the escaping of ammonia control room anti-
Answer unreacted NH in device3It is oxidized to N2And H2O, so as to ensure that the content of ammonia in gas gas, the row of effectively preventing is discharged
Secondary pollution caused by sky.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of denitrification apparatus for power plant provided by the utility model；
Figure label explanation：1- urea storage tanks, 2- multi-fluid injection apparatus, 3- mixing ducts, 4- catalytic reactors, 5-
One delivery pipe, 6- peristaltic pumps, 7- smoke discharging pipes, 8- control systems, 9- expansion joints, 10- the escaping of ammonia control rooms, 11- first are filtered
Device, the second filters of 12-, 21- urea solution imports, 22- compressed air inlets, 31- high-temperature flue gas imports, 32- reducing agent imports,
33- fluid-mixing outlets, 101- temperature sensors, 102- flow sensors, 103-NOx concentration detectors, 221- pressure regulation dress
It sets.
Specific implementation mode
The utility model is described in further detail in the following with reference to the drawings and specific embodiments, so that those skilled in the art
The utility model may be better understood and can be practiced, but illustrated embodiment is not as the restriction to the utility model.
An a kind of embodiment for the denitrification apparatus for power plant of the utility model, the denitrification apparatus include urea storage tank 1,
Multi-fluid injection apparatus 2, mixing duct 3, catalytic reactor 4 and the escaping of ammonia control room 10.Urea storage tank 1 is for storing as also
The urea solution that former agent uses, multi-fluid injection apparatus 2 is for spraying urea solution and compressed air, and mixing duct 3 is for so that spray
Urea solution and compressed air fluid after penetrating are sufficiently mixed uniformly with high-temperature flue gas, and catalytic reactor 4 is for restoring high-temperature flue gas
In nitrogen oxides, to obtain the tail gas of abundant denitration, the escaping of ammonia control room 10 for processing enter catalytic reactor 4 and not
The NH reacted3, and then prevent secondary pollution caused by emptying.
Specifically, the multi-fluid injection apparatus 2 is equipped with urea solution import 21 and compressed air inlet 22, the urea
Liquid import 21 is connected to by the first delivery pipe 5 with the urea storage tank 1, and first delivery pipe 5 is equipped with peristaltic pump 6, this is compacted
Urea solution can not only be carried out pressurized delivered by dynamic pump 6, additionally it is possible to measure the amount of the urea solution of conveying.The compressed air inlet
22 are connected to a compressed air source, for being sent into compressed air into the multi-fluid injection apparatus 2.
The mixing duct 3 is equipped with high-temperature flue gas import 31, reducing agent import 32 and fluid-mixing outlet 33, described
High-temperature flue gas import 31 is connect with the smoke discharging pipe 7 of power plant, and the high-temperature flue gas in smoke discharging pipe 7 passes through the high-temperature flue gas import 31
Into in mixing duct 3.
The reducing agent import 32 is connect with the jet exit of the multi-fluid injection apparatus 2, the fluid-mixing discharge
Mouth 33 is connect with the import of the catalytic reactor 4, and the high-temperature flue gas and urea solution mixing in the mixing duct 3 are laggard
Enter reaction in the catalytic reactor 4, the nitrogen oxides in catalytic reactor 4 in high-temperature flue gas is reduced, to be filled
Divide the tail gas of denitration.
Unreacted ammonia is directly discharged to secondary pollution caused by environment in catalytic reactor 4 in order to prevent, is being catalyzed
The outlet of reactor 4 is connected with the escaping of ammonia control room 10, will fail the ammonia of reaction in tail gas by the escaping of ammonia control room 10
Further removal.Preferably, it is provided in the escaping of ammonia control room 10 and enters the escaping of ammonia control room 10 for aoxidizing
NH in interior gas3Catalyst bed.
The denitrification apparatus includes control system 8, and the smoke discharging pipe 7 is being equipped with temperature at the high-temperature flue gas import 31
Spend sensor 101, flow sensor 102 and NOx concentration detector 103, the control system 8 respectively with the temperature sensor
101,6 connection communication of flow sensor 102, NOx concentration detector 103 and peristaltic pump.
In actual motion, detection enters in real time for temperature sensor 101, flow sensor 102 and NOx concentration detector 103
Temperature, flow and the NOx concentration of high-temperature flue gas in mixing duct 3, and coherent signal is conveyed to control system 8, control system
System 8 exports control signal to peristaltic pump 6, peristaltic pump by the analysis of the temperature of the high-temperature flue gas to reception, flow and NOx concentration
6 receive the control signal from control system 8, and adjust the flow of the urea solution of conveying, so as to control urea well
Emitted dose, not only allow more nitrogen oxides to restore, moreover it is possible to save raw material, reduce energy consumption.
In one preferred embodiment, in order to which the impurity timely processing in the urea solution by conveying is fallen, the wriggling
Pump 6 with connect between the urea storage tank 1 equipped with first filter 11 and the second filter 12.
In one preferred embodiment, the pipeline that the compressed air inlet 22 is connected to compressed air source is equipped with
Regulator 221, the regulator 221 and 8 connection communication of the control system.Compressed air is controlled by control system 8
Pressure be conducive to improve nitrogen oxides so as to controlling the jet velocity of urea solution and the uniformity of injection well
Transfer efficiency.Preferably, the pressure of compressed air is 2~3MPa.
In one preferred embodiment, in order to enable injection fluid can be filled with high-temperature flue gas in mixing duct 3
The mixing divided, to ensure high denitration efficiency, the mixing duct 3 is interior to be equipped with baffle plate along fluid flow direction interval.It should
Baffle plate setting so that mixing duct 3 in fluid occur various dimensions disturbance, mixing more fully.Preferably, described
What is be spaced in mixing duct 3 is equipped with 3 baffle plates, wherein there are two the baffle plates to be arranged in mixing duct inside upper part, has
One baffle plate setting is in mixing duct lower inside, in this way, fluid is flowed in mixing duct 3 with S types path.
In one preferred embodiment, in order to prevent between mixing duct 3 and catalytic reactor 4 junction fracture,
Expansion joint 9 is equipped between the mixing duct 3 and the catalytic reactor 4.
A kind of denitrification apparatus for power plant of the utility model, has the advantages that：
(1) denitrification apparatus for power plant of the utility model, first by the urea solution and high-temperature flue gas as reducing agent
It is sufficiently mixed to be re-fed into catalytic reactor in mixing duct first and carries out selective catalytic reduction, due to reducing agent and high temperature
Flue gas is sufficiently mixed, so that the nitrogen oxides in high-temperature flue gas can be contacted more fully with reducing agent, is conducive to carry
The transformation efficiency of high nitrogen oxides.
(2) device is equipped with temperature sensor, flow sensor and NOx concentration detector at high-temperature flue gas import, and
Temperature sensor, flow sensor, NOx concentration detector and the peristaltic pump that is arranged on urea solution conveyance conduit are with control
System connection communication, so as to control the emitted dose of urea well so that the emitted dose of urea is discharged with high-temperature flue gas
Change and change, by the lasting monitoring to NOx concentration, control system can continue to adjust the emitted dose of urea solution, allow more
NOx is restored, and improves the conversion ratio of nitrogen oxides in effluent.
(3) the utility model is equipped with the escaping of ammonia control room after catalytic reactor, will be catalyzed by the escaping of ammonia control room anti-
Answer unreacted NH in device3It is oxidized to N2And H2O, so as to ensure that the content of ammonia in gas gas, the row of effectively preventing is discharged
Secondary pollution caused by sky.
Embodiment described above is only the preferred embodiment lifted to absolutely prove the utility model, the utility model
Protection domain it is without being limited thereto.Those skilled in the art on the basis of the utility model made by equivalent substitute or change
It changes, both is within the protection scope of the present invention.The scope of protection of the utility model is subject to claims.
Claims (8)
1. a kind of denitrification apparatus for power plant, which is characterized in that including urea storage tank (1), multi-fluid injection apparatus (2), mix
Close pipeline (3), catalytic reactor (4) and the escaping of ammonia control room (10), the multi-fluid injection apparatus (2) equipped with urea solution into
Mouth (21) and compressed air inlet (22), the urea solution import (21) pass through the first delivery pipe (5) and the urea storage tank (1)
Connection, first delivery pipe (5) are equipped with peristaltic pump (6), and the compressed air inlet (22) is connected to a compressed air source,
For being sent into compressed air into the multi-fluid injection apparatus (2)；The mixing duct (3) is equipped with high-temperature flue gas import
(31), reducing agent import (32) and fluid-mixing outlet (33), the smoke discharging pipe of high-temperature flue gas import (31) and power plant
(7) it connects, the reducing agent import (32) connect with the jet exit of the multi-fluid injection apparatus (2), the fluid-mixing
Outlet (33) is connect with the import of the catalytic reactor (4), and the high-temperature flue gas and urea solution are in the mixing duct (3)
Enter reaction in the catalytic reactor (4), outlet and the escaping of ammonia control room of the catalytic reactor (4) after interior mixing
(10) it connects, the escaping of ammonia control room (10) is for handling unreacted NH in the catalytic reactor (4)3；It further include control
System (8) processed, the smoke discharging pipe (7) are being equipped with temperature sensor (101), flow at the high-temperature flue gas import (31)
Sensor (102) and NOx concentration detector (103), the control system (8) respectively with the temperature sensor (101), flow
Sensor (102), NOx concentration detector (103) and peristaltic pump (6) connection communication.
2. a kind of denitrification apparatus for power plant as described in claim 1, which is characterized in that the peristaltic pump (6) with it is described
Series connection is equipped with first filter (11) and the second filter (12) between urea storage tank (1).
3. a kind of denitrification apparatus for power plant as described in claim 1, which is characterized in that the compressed air inlet (22)
The pipeline being connected to compressed air source is equipped with regulator (221), the regulator (221) and the control system (8)
Connection communication.
4. a kind of denitrification apparatus for power plant as described in claim 1, which is characterized in that the interior edge of the mixing duct (3)
Fluid flow direction interval is equipped with baffle plate.
5. a kind of denitrification apparatus for power plant as claimed in claim 4, which is characterized in that between in the mixing duct (3)
Every be equipped with 3 baffle plates, wherein there are two baffle plate settings in mixing duct inside upper part, and there are one the bafflings
Plate is arranged in mixing duct lower inside.
6. a kind of denitrification apparatus for power plant as described in claim 1, which is characterized in that the pressure of the compressed air is
2~3MPa.
7. a kind of denitrification apparatus for power plant as described in claim 1, which is characterized in that the mixing duct (3) and institute
It states and is equipped with expansion joint (9) between catalytic reactor (4).
8. a kind of denitrification apparatus for power plant as described in claim 1, which is characterized in that the escaping of ammonia control room (10)
It is inside provided with and enters NH in the interior gas of the escaping of ammonia control room (10) for aoxidizing3Catalyst bed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721818372.0U CN207929004U (en) | 2017-12-22 | 2017-12-22 | A kind of denitrification apparatus for power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721818372.0U CN207929004U (en) | 2017-12-22 | 2017-12-22 | A kind of denitrification apparatus for power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207929004U true CN207929004U (en) | 2018-10-02 |
Family
ID=63646731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721818372.0U Expired - Fee Related CN207929004U (en) | 2017-12-22 | 2017-12-22 | A kind of denitrification apparatus for power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207929004U (en) |
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2017
- 2017-12-22 CN CN201721818372.0U patent/CN207929004U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20181002 Termination date: 20181222 |