CN205833093U - Modified model SNCR denitration ammonia dilution system - Google Patents
Modified model SNCR denitration ammonia dilution system Download PDFInfo
- Publication number
- CN205833093U CN205833093U CN201620708635.1U CN201620708635U CN205833093U CN 205833093 U CN205833093 U CN 205833093U CN 201620708635 U CN201620708635 U CN 201620708635U CN 205833093 U CN205833093 U CN 205833093U
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- CN
- China
- Prior art keywords
- transfer pipeline
- ammonia
- demineralized water
- tank used
- electromagnetic flowmeter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 title claims abstract description 141
- 229910021529 ammonia Inorganic materials 0.000 title claims abstract description 70
- 238000010790 dilution Methods 0.000 title claims abstract description 23
- 239000012895 dilution Substances 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000012546 transfer Methods 0.000 claims abstract description 35
- 230000033228 biological regulation Effects 0.000 claims abstract description 28
- 239000011259 mixed solution Substances 0.000 claims abstract description 12
- 238000010612 desalination reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- 239000003085 diluting agent Substances 0.000 description 15
- 239000003638 chemical reducing agent Substances 0.000 description 8
- 239000012535 impurity Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 239000000779 smoke Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- -1 float Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000006722 reduction reaction Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- YZCKVEUIGOORGS-UHFFFAOYSA-N Hydrogen atom Chemical compound [H] YZCKVEUIGOORGS-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 150000001767 cationic compounds Chemical class 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910001411 inorganic cation Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses a kind of modified model SNCR denitration ammonia dilution system, tank used for storing ammonia transfer pipeline, demineralized water transfer pipeline and the mixed solution container controlled including control system, tank used for storing ammonia transfer pipeline is connected with mixed solution container after demineralized water transfer pipeline parallel connection, described tank used for storing ammonia transfer pipeline is disposed with determines frequency pump A, electromagnetic flowmeter A, pneumatic ball valve A and regulation valve A, is provided with electromagnetic flowmeter B between described tank used for storing ammonia transfer pipeline and demineralized water transfer pipeline junction point and mixed solution container.This utility model achieves exact flow rate monitoring and regulation and control to demineralized water and ammonia spirit, thus ensures that the ammonia spirit after last dilution is in optimal concentration range, it is ensured that final denitration effect, it is to avoid the not qualified discharge of NOx, reduces air environmental pollution.
Description
Technical field
This utility model relates to gas denitrifying technology field, particularly modified model SNCR denitration ammonia dilution system.
Background technology
Along with country's attention to environmental protection, the standard of boiler smoke discharge is increasingly stricter, and wherein the discharge of NOx was by originally
Do not do requirement, newly-built heat power plant boiler discharge≤100mg/m3, existing thermal power plant pot after requiring till now 2012
Fire grate to be also down to≤100mg/m3 after being put into 2014.Therefore, the NOx that burning of originating boiler NOx produces is original dense
The control of degree requires more and more higher, and carrying out coal-burning boiler fall nitrogen denitration is an extremely urgent job.
At present both at home and abroad denitration of boiler smoke engineering major technique has: selective catalytic reduction (SCR), selectivity is non-urges
Change reducing process (SNCR), low nitrogen burning method (LNB).In various NOx removal techniques, SNCR denitration technique has low cost, accounts for
Ground area is little, the simple advantage of facility, is especially suitable for the transformation of old power plant.
In existing SNCR denitration technology, reducing agent and diluent are carried metering link, substantially all employing dosing pump
Or all use fixed frequency pump.Use dosing pump can ammonia and dilution water accurately be regulated completely, but every boiler be equipped with a pump,
Economy is inconspicuous；Use fixed frequency pump can reduce the quantity of pump completely, but lack accurately regulation.
For the problems referred to above, the Chinese patent of Publication No. CN204429087U provides a solution；
The program is specially a kind of coal-burning boiler SNCR denitration reducing agent and diluent transport metering mechanism, including reduction
Agent conveyer device, diluent conveyer device and pipeline, described reducing agent conveyer device also includes reducing agent delivery pump, described reduction
Agent conveyer device is provided with reductant metering pump, described diluent conveyer device is provided with diluent frequency pump, described reducing agent surely
Conveyer device and diluent conveyer device are connected to mixed solution container, and described whole device is controlled by control system, described
Diluent conveyer device also includes that diluent pneumatic ball valve, diluent regulation valve, diluent electromagnetic flowmeter and diluent are supported oneself
Formula ball valve.
This utility model improves the dilution precision to reducing agent to a certain extent, sets on diluent conveyer device simultaneously
Having put diluent electromagnetic flowmeter, electromagnetic flowmeter is application electromagnetic induction principle, during according to conductor fluid by externally-applied magnetic field
The electromotive force inducted is to measure a kind of instrument of conductor fluid flow, and the measurement result of conductor fluid is being compared orifice flow by it
Meter, vortex-shedding meter etc. has higher certainty of measurement, but the diluent of SNCR denitration mostly is demineralized water, and demineralized water refers to
Utilize various water treatment technology, after removing the impurities in water such as float, colloid and inorganic cation, anion, obtained
Product water, is practically free of conductive ion in demineralized water, the conductivity causing demineralized water is extremely low, so makes the reading of electromagnetic flowmeter
Number is inaccurate, thus affects the combined amount of diluent, thus causes the diluted concentration of reducing agent to there is deviation, finally affects boiler
The denitration effect of flue gas.
Utility model content
The deficiency existed for prior art, it is dilute that the purpose of this utility model is to provide a kind of modified model SNCR denitration ammonia
Release system, this dilution system can realize exact flow rate monitoring, thus ensure the ammonia after last dilution demineralized water and ammonia spirit
Aqueous solution is in optimal concentration range, it is ensured that final denitration effect.
Above-mentioned technical purpose of the present utility model has the technical scheme that
A kind of modified model SNCR denitration ammonia dilution system, the tank used for storing ammonia transfer pipeline controlled including control system, removes
Saline transfer pipeline and mixed solution container, with mixed solution container phase after tank used for storing ammonia transfer pipeline is in parallel with demineralized water transfer pipeline
Even, described tank used for storing ammonia transfer pipeline is disposed with determines frequency pump A, electromagnetic flowmeter A, pneumatic ball valve A and regulation valve A, described
It is provided with electromagnetic flowmeter B between tank used for storing ammonia transfer pipeline and demineralized water transfer pipeline junction point and mixed solution container.
Using said structure, what electromagnetic flowmeter A surveyed is the flow of the ammonia spirit that concentration is higher, and electromagnetic flowmeter B surveys
Be the flow of ammonia spirit after demineralized water dilutes because the ammonia spirit before dilution and after dilution all containing more
Ammonium radical ion, hydrion and hydroxide ion, therefore dilution before and dilution after ammonia spirit all there is more conductive ion,
Make solution have bigger conductivity so that electromagnetic flowmeter A and electromagnetic flowmeter B be respectively provided with the higher flow of precision and read
Number, therefore the flow of ammonia can be learnt according to the reading of electromagnetic flowmeter A, according to the reading of electromagnetic flowmeter B Yu electromagnetic flowmeter A
Difference determine the flow of demineralized water, thus by regulating both flows to reach Flow-rate adjustment accurately, it is ensured that finally dilute
After ammonia spirit can reach optimal denitration effect in boiler.
It is additionally provided with filter before being further arranged in described tank used for storing ammonia transfer pipeline fixed frequency pump A.
Use said structure, since it is considered that production cost, ammonia is usually mixed with and comes from industrial liquid ammonia and liquefied ammonia
Impurity in holding vessel, easily causes spray gun blocking, also can impact the Monitoring Data of the instrument such as effusion meter, filter simultaneously
The solid impurity that can effectively filter in ammonia spirit is set, prevent impurity from the nozzle of spray gun being resulted in blockage, reduce miscellaneous simultaneously
Confrontation meter readings impacts, the service life of prolonging nozzle, it is ensured that denitration effect.
Being further arranged to described tank used for storing ammonia transfer pipeline also at least provided with a bypass, every bypass sets gradually
Having filter, fixed frequency pump A and electromagnetic flowmeter A, wherein electromagnetic flowmeter A is connected with the regulation valve A in main road.
Using said structure, when tank used for storing ammonia conveying main line breaks down, or filter needs to clean or change filter element
Time, bypass can be switched to by pneumatic ball valve A, thus reach to carry out ammonia spirit filtering and not affecting boiler smoke
Denitration properly functioning.
Be further arranged to described demineralized water pipeline be disposed with determine frequency pump B, pneumatic ball valve B and regulation valve B.
Use said structure, open regulation valve B and fixed frequency pump B, by electromagnetic flowmeter A and the reading of electromagnetic flowmeter B
Regulation regulation valve B just can make ammonia be diluted to optimal concentration.
Being further arranged to described demineralized water pipeline also at least provided with a bypass, every bypass is provided with determines frequency pump B,
Fixed frequency pump B is connected with the regulation valve B in main road.
Use said structure, when demineralized water main line breaks down, bypass can be switched to by pneumatic ball valve B, thus
Ensure being normally carried out of ammonia spirit dilution, it is ensured that the effect of denitration of boiler smoke.
In sum, this utility model has the advantages that
1. by electromagnetic flowmeter and regulation valve arrange demineralized water and ammonia spirit are achieved exact flow rate monitor and
Regulation and control, thus ensure that the ammonia spirit after last dilution is in optimal concentration range, it is ensured that final denitration effect, it is to avoid NOx
Not qualified discharge, reduce air environmental pollution；
2. the setting of tank used for storing ammonia transfer pipeline filter decreases the impurity in ammonia, eliminates impurity to flowing below
Gauge and the impact of denitration nozzle, improve the reliability of whole system；
3. the design of tank used for storing ammonia conveying bypass and demineralized water conveying bypass ensure that the stability of system.
Accompanying drawing explanation
Fig. 1 is the structural representation of this embodiment.
Reference: 1. filter；2. fixed frequency pump A；3. electromagnetic flowmeter A；4. pneumatic ball valve A；5. regulation valve A；6. electricity
Magnetic flowmeter B；7. fixed frequency pump B；8. pneumatic ball valve B；9. regulation valve B.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further detail.
Embodiment:
A kind of modified model SNCR denitration ammonia dilution system, as shown in Figure 1: include that the tank used for storing ammonia that control system controls is defeated
Send pipeline, demineralized water transfer pipeline and mixed solution container, with mixed after tank used for storing ammonia transfer pipeline is in parallel with demineralized water transfer pipeline
Conjunction liquid container is connected.
Tank used for storing ammonia transfer pipeline is disposed with filter 1, fixed frequency pump A2, electromagnetic flowmeter A3, pneumatic ball valve A4 and
Regulation valve A5, tank used for storing ammonia transfer pipeline is parallel with a tank used for storing ammonia conveying bypass, and tank used for storing ammonia conveying bypass one end is connected to
After storage tank, on the pipeline before filter 1, after the other end is connected to pneumatic ball valve A4, on the pipeline before regulation valve A5,
Tank used for storing ammonia conveying bypass is disposed with filter 1, fixed frequency pump A2 and electromagnetic flowmeter A3.
Demineralized water transfer pipeline is disposed with determines frequency pump B7, pneumatic ball valve B8 and regulation valve B9, demineralized water transfer pipeline
It is parallel with a demineralized water conveying bypass, after demineralized water conveying bypass one end is connected to demineralized water filling, the pipe before fixed frequency pump B7
Lu Shang, after the other end is connected to pneumatic ball valve B8, on the pipeline before regulation valve B9, it is fixed that demineralized water conveying bypass is provided with
Frequently pump B7.
It is provided with Electromagnetic Flow between tank used for storing ammonia transfer pipeline and demineralized water transfer pipeline junction point and mixed solution container
Meter B6.
Operation principle: open and determine frequency pump A2 in tank used for storing ammonia transfer pipeline, it is ensured that at pneumatic ball valve A4 and regulation valve A5
In open mode, open simultaneously and demineralized water pipeline determines frequency pump B7, it is ensured that pneumatic ball valve B8 and regulation valve B9 is in and opens shape
State, what electromagnetic flowmeter A3 and electromagnetic flowmeter A6 surveyed is all the ammonia spirit containing high electrical conductivity, therefore electromagnetic flowmeter A3
All can measure flow value the most accurately with electromagnetic flowmeter A6, by the reading of electromagnetic flowmeter A6 and electromagnetic flowmeter A3 it
Difference, just can determine that the flow of demineralized water in demineralized water pipeline, reaches to realize demineralized water and ammonia spirit exact flow rate monitoring, logical
Overregulate regulation valve A5 and control the flow of ammonia, the flow controlling demineralized water by regulation regulation valve B9, make ammonia and demineralized water
Reach to measure accurately simultaneously, thus ensure that the ammonia spirit after last dilution is in optimal concentration range, it is ensured that final is de-
Nitre effect；
The setting of tank used for storing ammonia transfer pipeline filter 1 simultaneously decreases the impurity in ammonia, eliminates impurity to below
Effusion meter and the impact of denitration nozzle, improve the reliability of whole system；
The design of tank used for storing ammonia conveying bypass makes when tank used for storing ammonia conveying main line breaks down, or filter needs clear
When washing or change filter element, bypass can be switched to by pneumatic ball valve A；The design of demineralized water conveying bypass makes when demineralized water is responsible for
Time breaking down in road, bypass can be switched to by pneumatic ball valve B, thus ensure that what ammonia spirit diluted is normally carried out, it is ensured that
The effect of denitration of boiler smoke, finally improves the stability of whole system.
This specific embodiment is only that it is not to restriction of the present utility model, ability to explanation of the present utility model
The present embodiment can be made after reading this specification by field technique personnel as required does not has the amendment of creative contribution, but
As long as all being protected by Patent Law in right of the present utility model.
Claims (5)
1. a modified model SNCR denitration ammonia dilution system, including tank used for storing ammonia transfer pipeline, the desalination of control system control
Water transfer pipeline and mixed solution container, with mixed solution container phase after tank used for storing ammonia transfer pipeline is in parallel with demineralized water transfer pipeline
Even, it is characterized in that: described tank used for storing ammonia transfer pipeline is disposed with determines frequency pump A(2), electromagnetic flowmeter A(3), pneumatic ball valve A
(4) and regulation valve A(5), set between described tank used for storing ammonia transfer pipeline and demineralized water transfer pipeline junction point and mixed solution container
It is equipped with electromagnetic flowmeter B(6).
Modified model SNCR denitration ammonia dilution system the most according to claim 1, is characterized in that: described tank used for storing ammonia carries
Fixed frequency pump A(2 in pipeline) it is additionally provided with filter (1) before.
Modified model SNCR denitration ammonia dilution system the most according to claim 2, is characterized in that: described tank used for storing ammonia carries
Pipeline is also at least provided with a bypass, and every bypass is disposed with filter (1), fixed frequency pump A(2) and electromagnetic flowmeter A
(3), wherein electromagnetic flowmeter A(3) with the regulation valve A(5 in main road) be connected.
Modified model SNCR denitration ammonia dilution system the most according to claim 1, is characterized in that: described demineralized water pipeline depends on
Secondary being provided with determines frequency pump B(7), pneumatic ball valve B(8) and regulation valve B(9).
Modified model SNCR denitration ammonia dilution system the most according to claim 4, is characterized in that: described demineralized water pipeline is also
At least provided with a bypass, every bypass is provided with determines frequency pump B(7), fixed frequency pump B(7) with the regulation valve B(9 in main road) phase
Even.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620708635.1U CN205833093U (en) | 2016-07-05 | 2016-07-05 | Modified model SNCR denitration ammonia dilution system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620708635.1U CN205833093U (en) | 2016-07-05 | 2016-07-05 | Modified model SNCR denitration ammonia dilution system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205833093U true CN205833093U (en) | 2016-12-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620708635.1U Expired - Fee Related CN205833093U (en) | 2016-07-05 | 2016-07-05 | Modified model SNCR denitration ammonia dilution system |
Country Status (1)
| Country | Link |
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| CN (1) | CN205833093U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339422A (en) * | 2018-04-04 | 2018-07-31 | 哈尔滨理工大学 | A kind of urea mixed diluting system and its control method for SNCR denitration |
| CN111841249A (en) * | 2019-04-26 | 2020-10-30 | 宁德时代新能源科技股份有限公司 | Tail gas purification system |
-
2016
- 2016-07-05 CN CN201620708635.1U patent/CN205833093U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108339422A (en) * | 2018-04-04 | 2018-07-31 | 哈尔滨理工大学 | A kind of urea mixed diluting system and its control method for SNCR denitration |
| CN108339422B (en) * | 2018-04-04 | 2020-11-20 | 哈尔滨理工大学 | Urea mixing and diluting system for SNCR (selective non-catalytic reduction) denitration and control method thereof |
| CN111841249A (en) * | 2019-04-26 | 2020-10-30 | 宁德时代新能源科技股份有限公司 | Tail gas purification system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20161228 |