CN107998878A - A kind of accurate gametic fertility equipment of large-scale flue - Google Patents
A kind of accurate gametic fertility equipment of large-scale flue Download PDFInfo
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- CN107998878A CN107998878A CN201711304470.7A CN201711304470A CN107998878A CN 107998878 A CN107998878 A CN 107998878A CN 201711304470 A CN201711304470 A CN 201711304470A CN 107998878 A CN107998878 A CN 107998878A
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- flue
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- air admission
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The present invention relates to field of industrial measurement, and in particular to a kind of large-scale accurate gametic fertility equipment of flue, including：Flue module, spray ammonia system；Multiple through holes are offered in wherein described flue module, the through hole runs through the flue module, and multiple through holes are opened in the flue module in grid matrix shape；The spray ammonia system includes computer control system, nozzle, valve body；The nozzle is both provided with multiple through holes, multiple nozzles are individually controlled by multiple valve bodies respectively；The present invention in flue by setting the flue module being made of multiple latticed through holes, so that flue gas is equably segmented in single through hole, and probe tube and ammonia nozzle are separately provided in single through hole, realize independent detection and the spray ammonia to the NOx content in flue gas in single through hole, so as to accurately carry out gametic fertility to flue gas, gametic fertility efficiency is improved, there are efficient, energy-saving and environmental protection.
Description
Technical field
The present invention relates to field of industrial measurement, and in particular to a kind of large-scale accurate gametic fertility equipment of flue.
Background technology
SCR (selective catalytic reduction) refers in the presence of catalyst and oxygen, in 320 DEG C~427 DEG C temperature ranges
Under, reducing agent (anhydrous ammonia, ammonium hydroxide or urea) selectively generates harmless nitrogen and water with the NOx reactions in flue gas, so that
The NOx in flue gas is removed, SCR denitration device is usually placed in above the steel flue gas duct stent between boiler and electric precipitator, and mesh
It is mounted on detection sampler on the entrance of preceding most SCR denitration device, outlet, but current detection sampler
Sampling mode be single-point sampling；Since turbulence flow flied is presented in flue gas in flue, close to reducing flue, wall flow of flue gas
It is more chaotic, therefore：Existing detection sampler has the disadvantage that at present：It is single to sample region, without representativeness, nothing
Method gets representative flue gas, and to embody the exhaust gas components of whole flue, denitration flue gas inspection just loses for existing detection undersampling
Accuracy and reliability is gone.
In recent years, economic society high-speed smooth in China's develops, and realizes huge economic and social benefit, but thereupon
Environmental problem increasingly become and restrict the severe bottleneck that further develops of China.To strengthen Thermal Power Generation Industry environmental protection management, lifting
Sustainable Development Level, country's limitation coal unit Air Pollutant Emission concentration are：Flue dust 5mg/m3, sulfur dioxide 35mg/
M3, nitrogen oxides 50mg/m3.Do not reach discharge standard at the appointed time not provides environmentally friendly electricity price.
The ultra-clean emission request oncoming force is swift and violent, has to the nitrogen oxides after denitration and the sulfur dioxide after desulfurization same high
Discharge standard, still, compares operation coal fired power plant flue gas desulfurization engineering for a long time, due to denitration engineering launch usage time compared with
Short, technique still imperfection, how to reach current higher denitration efficiency and discharge value standard becomes major coal-burning power plant and faces
Great challenge.
To realize ultra-clean emission compliance, it is necessary to capture coal-burning power plant's denitration this great environment-friendly engineering, understanding denitration
Technique, is familiar with the characteristics of denitration is run, and on the basis of improving the means such as the reliability of denitration device, to reduce in sold out operation absolutely
It is particularly important that most problem, optimization denitration reaction.
Presently, there are denitration efficiency not enough, discharge easily exceeded, the escaping of ammonia rate it is excessive and due to cannot rationally control spray ammonia to lead
The problems such as catalyst life of cause reaches design load, and air preheater blocks.
For denitration spray ammonia control situation we do a lot of work after find, denitration outlet measuring point then there are straight tube
The problems such as road falls short of, and flue turbulent flow is serious, NOX skewness, and flue gas flow rate is inconsistent.Cause to spray ammonia control hardly possible, Wu Fashi
Easily there is excessive spray ammonia in the case of being now precisely controlled or spray the situation of ammonia deficiency.By different negative in thermal power generation unit
Experiment is compared in lotus, diverse location measuring point, finds each measuring point under different load, corresponding all without fixation with floss hole data
Relation.SCR equipment for denitrifying flue gas is arranged in above the steel flue gas duct stent between boiler and electric precipitator.Divide SCR inlet A, B both sides
With SCR outlets A, B both sides.At present major part unit SCR inlet, outlet A B sides smoke sampling be single-point sampling, entrance A
Side and B sides respectively set a smoke sampling point.After denitration outlet sample point is built up in lower floor SCR, lead to the vertical gas pass of air preheater
Place, residing flue is below denitration reaction layer, smoke sampling directly level is in vertical gas pass.Since flue cross section product is big and flue gas
Composition skewness, flow velocity are inconsistent.Single measuring point can not meet that the spray ammonia of whole flue is adjusted.Surveyed for air flue horizontal section
In flue upper surface, insertion is located at flue middle position to point, since turbulence flow flied is presented in flue gas in flue, close to reducing cigarette
Road, wall flow of flue gas is more chaotic, can not adjust the ammonia spraying amount at each position of flue, so as to local excessive spray ammonia easily occur
With the situation of local spray ammonia deficiency.
The content of the invention
In view of this, in order to solve the problems of the prior art, the present invention proposes a kind of large-scale accurate gametic fertility of flue
Equipment.
The present invention is solved the above problems by following technological means：
A kind of accurate gametic fertility equipment of large-scale flue, including：Flue module, spray ammonia system；Wherein described flue module
On offer multiple through holes, the through hole runs through the flue module, and multiple through holes are opened in described in grid matrix shape
In flue module；
The spray ammonia system includes computer control system, nozzle, valve body, and the valve body controls ammonia from the nozzle
Spray, the computer control system controls the valve body；
The nozzle is both provided with multiple through holes, multiple nozzles are individually carried out by multiple valve bodies respectively
Control.
In detail, further include：Cycle detection sampler；The cycle detection sampler includes：Gas analyzer, mother
Pipe, aspiration pump, the first control valve, the first probe tube, the second control valve, the second probe tube；
The outlet side of wherein described main pipe is connected with the air inlet of the aspiration pump, the gas outlet of the aspiration pump with it is described
Gas analyzer connects, and gas sampled is sent into the gas analyzer by the main pipe by the aspiration pump；
The inlet end of wherein described main pipe is connected with first control valve, and first control valve is equipped with multiple first
Air admission hole, multiple first air admission holes can in turn be circulated by the control for the relay being arranged in first control valve and led
Logical, first air admission hole is respectively connected with first probe tube；
Multiple first probe tubes by the control stream of the relay device wheel in first control valve cyclically with it is described
Main pipe connects.
First probe tube is connected with second control valve, and second control valve is equipped with multiple second air inlets
Hole, multiple second air admission holes can circulate conducting in turn by the control for the relay being arranged in second control valve,
Second air admission hole is respectively connected with second probe tube；
Second probe tube is both provided with the plurality of through hole, second probe tube is extracted in the through hole
Gas；The gas analyzer second probe tube is extracted other be detected output data result；The data
As a result it is fed back to the computer control system.
In detail, multiple through holes are opened in the flue module in three rows four row, amount to 12 through holes.
In detail, first control valve is equipped with four first air admission holes, distinguishes equipped with four the first probe tubes
It is connected on four first air admission holes；Second control valve is equipped with three second air admission holes, equipped with three
Two probe tubes are connected on three second air admission holes；12 are separately positioned on equipped with 12 second probe tubes
In a through hole.
In detail, temperature measuring equipment is equipped with the through hole, the temperature measuring equipment is controlled with the computer
System is connected；Catalyst is both provided with the through hole.
The present invention in flue by setting the flue module being made of multiple latticed through holes so that flue gas is uniform
Ground Split is separately provided probe tube and ammonia nozzle in single through hole in single through hole, realize in single through hole
Independent detection and the spray ammonia of NOx content in flue gas, so as to accurately carry out gametic fertility to flue gas, improves gametic fertility
Efficiency, has the characteristics that efficient, energy-saving and environmental protection.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, put on not making the creative labor, other can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the structure diagram of cycle detection sampler in the present invention；
Fig. 3 is the electric operation control circuit figure of the cycle detection sampler in the present invention.
Description of reference numerals：
1- flues module, 2- through holes, 3- flues, 11- main pipes, the first control valves of 12-, the first probe tubes of 13-, 14- second
Control valve, the second probe tubes of 15-.
Embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with attached drawing and specifically
Embodiment technical scheme is described in detail.It is pointed out that described embodiment is only this hair
Bright part of the embodiment, instead of all the embodiments, based on the embodiments of the present invention, those of ordinary skill in the art are not having
Make and all other embodiments obtained are put on creative work, belong to the scope of protection of the invention.
It is to be appreciated that the orientation or position relationship of the instruction such as term " top ", " vertical part " are based on shown in the drawings
Orientation or position relationship, are for only for ease of the description present invention and simplify description, rather than instruction or imply signified device or
Element must have specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Term " first ", " second ", " the 3rd " are only used for description purpose, and it is not intended that indicating or implying relatively important
Property or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", " second ", " the 3rd " feature can
To express or implicitly include one or more this feature.In the description of the present invention, unless otherwise indicated, " one group "
It is meant that two or more.
Embodiment
As shown in Figure 1, 2, 3, the accurate gametic fertility equipment of a kind of large-scale flue, including：Flue module 1, spray ammonia system (figure
Not shown in)；Multiple through holes 2 are offered in wherein described flue module 1, the through hole 2 runs through the flue module 1, multiple
The through hole 2 is opened in the flue module 1 in grid matrix shape；
The spray ammonia system includes computer control system, nozzle, valve body, and the valve body controls ammonia from the nozzle
Spray, the computer control system controls the valve body；
Be both provided with the nozzle in multiple through holes 2, multiple nozzles respectively by multiple valve bodies individually into
Row control.
In detail, further include：Cycle detection sampler；The cycle detection sampler includes：Gas analyzer, mother
Pipe 11, aspiration pump, the first control valve 12, the first probe tube 13, the second control valve 14, the second probe tube 15；
The outlet side of wherein described main pipe 11 is connected with the air inlet of the aspiration pump, the gas outlet of the aspiration pump and institute
Gas analyzer connection is stated, gas sampled is sent into the gas analyzer by the main pipe 11 by the aspiration pump；
The inlet end of wherein described main pipe 11 is connected with first control valve 12, and first control valve 12 is equipped with more
A first air admission hole, multiple first air admission holes can pass through the control wheel for the relay being arranged in first control valve 12
Stream circulation conducting, first air admission hole are respectively connected with first probe tube 13；
Multiple first probe tubes 13 by the control stream of the relay device wheel in first control valve 12 cyclically with
The main pipe 11 connects.
First probe tube 13 is connected with second control valve 14, and second control valve 14 is equipped with multiple second
Air admission hole, multiple second air admission holes can be circulated in turn by the control for the relay being arranged in second control valve 14
Conducting, second air admission hole are respectively connected with second probe tube 15；
Second probe tube 15 is both provided with the plurality of through hole 2, second probe tube 15 extracts described
Gas in through hole 2；The gas analyzer second probe tube 15 is extracted other be detected output data result；
The data result is fed back to the computer control system；It is more by being connected with the inlet main pipe 11 of gas analyzer
A probe tube, and probe tube is cyclically sampled in turn by the control of control valve, is realized by a gas analyzer
The function of cycle detection is carried out to the gas of multiple sample points, have it is simple in structure, into it is local the characteristics of, and pass through multidraw
Improve gas componant and the accuracy of Concentration Testing.
In detail, multiple through holes 2 are opened in the flue module 1 in three rows four row, amount to 12 it is described logical
Hole 2.
In detail, first control valve 12 is equipped with four first air admission holes, equipped with four the first probe tubes 13
It is connected on four first air admission holes；Second control valve 14 is equipped with three second air admission holes, is equipped with
Three the second probe tubes 15 are connected on three second air admission holes；Distinguish equipped with 12 second probe tubes 15
It is arranged in 12 through holes 2.
With reference to the course of work, the present invention is further described, entrance of the flue gas containing nitrogen oxides (NOx) from flue 3
Flow into, flue gas is divided to be separately flowed into the through hole 2 in more parts, and then second probe tube 15 will extract flue gas, will
Flue gas is sent into the gas analyzer content for analyzing nitrogen oxides in effluent (NOx), and the gas analyzer will be analyzed and tied
Fruit is output in the computer control system, and the computer control system controls the valve body to spray according to analysis result
Relative to the ammonia of amount.
In detail, temperature measuring equipment (not shown), the temperature measuring equipment and institute are equipped with the through hole 2
Computer control system is stated to be connected；Catalyst is both provided with the through hole 2.Gametic fertility is worked during start and stop
Journey：Denitration reaction temperature has considerable influence to NOx removal.When reaction temperature is at 200~310 DEG C, with the liter of reaction temperature
Height, NOx removal efficiency quickly increase.Exhaust gas volumn is few during start and stop, and 3 center smoke temperature of flue is usually higher, ambient temperature compared with
It is low, then if temperature is not reaching to the operating temperature of catalyst, the activity of catalyst is not high, even if having sprayed ammonia, ammonia and
The chemical reaction efficiency of nitrogen oxides (NOx) can be very low, this has resulted in a large amount of wastes of ammonia；So often in start and stop mistake
It is that this has resulted in a large amount of flue gases and has been directly discharged in air, causes pollution without spraying ammonia work in journey；So described
Set temperature measuring device in through hole 2, judges that this region whether may be used according to whether local temperature reaches catalyst operating temperature
Ammonia valve is sprayed to open, so as to fulfill the spray ammonia of locality is selected during start and stop, it is possible thereby to substantially reduce because of start and stop
Caused discharge is exceeded, decreases the discharge of pollutant.
The present invention in flue by setting the flue module being made of multiple latticed through holes so that flue gas is uniform
Ground Split is separately provided probe tube and ammonia nozzle in single through hole in single through hole, realize in single through hole
Independent detection and the spray ammonia of NOx content in flue gas, so as to accurately carry out gametic fertility to flue gas, improves gametic fertility
Efficiency, has the characteristics that efficient, energy-saving and environmental protection.
Embodiment described above only expresses the several embodiments of the present invention, its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, do not depart from present inventive concept on put, various modifications and improvements can be made, these belong to the present invention guarantor
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (5)
- A kind of 1. accurate gametic fertility equipment of large-scale flue, it is characterised in that including：Flue module, spray ammonia system；It is wherein described Multiple through holes are offered in flue module, the through hole runs through the flue module, and multiple through holes are opened in grid matrix shape It is located in the flue module；The spray ammonia system includes computer control system, nozzle, valve body, and the valve body control ammonia is sprayed from the nozzle Go out, the computer control system controls the valve body；The nozzle is both provided with multiple through holes, multiple nozzles are individually controlled by multiple valve bodies respectively System.
- 2. the accurate gametic fertility equipment of large-scale flue according to claim 1, it is characterised in that further include：Cycle detection Sampler；The cycle detection sampler includes：Gas analyzer, main pipe, aspiration pump, the first control valve, the first sampling Pipe, the second control valve, the second probe tube；The outlet side of wherein described main pipe is connected with the air inlet of the aspiration pump, the gas outlet of the aspiration pump and the gas Analyzer connects, and gas sampled is sent into the gas analyzer by the main pipe by the aspiration pump；The inlet end of wherein described main pipe is connected with first control valve, and first control valve is equipped with multiple first air inlets Hole, multiple first air admission holes can circulate conducting in turn by the control for the relay being arranged in first control valve, First air admission hole is respectively connected with first probe tube；Multiple first probe tubes by the control stream of the relay device wheel in first control valve cyclically with the main pipe Connection.First probe tube is connected with second control valve, and second control valve is equipped with multiple second air admission holes, more A second air admission hole can circulate conducting in turn by the control for the relay being arranged in second control valve, and described Two air admission holes are respectively connected with second probe tube；Second probe tube is both provided with the plurality of through hole, second probe tube extracts the gas in the through hole Body；The gas analyzer second probe tube is extracted other be detected output data result；The data result It is fed back to the computer control system.
- 3. the accurate gametic fertility equipment of large-scale flue according to claim 2, it is characterised in that multiple through holes are in three The row of row four are opened in the flue module, amount to 12 through holes.
- 4. the accurate gametic fertility equipment of large-scale flue according to claim 3, it is characterised in that on first control valve Equipped with four first air admission holes, it is connected to equipped with four the first probe tubes on four first air admission holes；It is described Second control valve is equipped with three second air admission holes, equipped with three the second probe tubes be connected to three described second into On stomata；It is separately positioned on equipped with 12 second probe tubes in 12 through holes.
- 5. the accurate gametic fertility equipment of large-scale flue according to claim 1-4 any of which items, it is characterised in that described Temperature measuring equipment is equipped with through hole, the temperature measuring equipment is connected with the computer control system；In the through hole It is both provided with catalyst.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711304470.7A CN107998878A (en) | 2017-12-11 | 2017-12-11 | A kind of accurate gametic fertility equipment of large-scale flue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711304470.7A CN107998878A (en) | 2017-12-11 | 2017-12-11 | A kind of accurate gametic fertility equipment of large-scale flue |
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| Publication Number | Publication Date |
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| CN107998878A true CN107998878A (en) | 2018-05-08 |
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ID=62058008
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| CN201711304470.7A Pending CN107998878A (en) | 2017-12-11 | 2017-12-11 | A kind of accurate gametic fertility equipment of large-scale flue |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109173706A (en) * | 2018-09-07 | 2019-01-11 | 西安热工研究院有限公司 | A kind of temperature of the big section flue of denitration, nitric oxide, oxygen multiple spot real-time measurement system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854597A (en) * | 2016-04-14 | 2016-08-17 | 国网河南省电力公司电力科学研究院 | Ammonia spraying grating intelligent optimization and adjustment system and method for SCR denitration device |
| CN106984191A (en) * | 2017-03-29 | 2017-07-28 | 华电电力科学研究院 | A kind of efficient hybrid system of reducing agent ammonia and its method of work for SCR denitrating flue gas |
-
2017
- 2017-12-11 CN CN201711304470.7A patent/CN107998878A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854597A (en) * | 2016-04-14 | 2016-08-17 | 国网河南省电力公司电力科学研究院 | Ammonia spraying grating intelligent optimization and adjustment system and method for SCR denitration device |
| CN106984191A (en) * | 2017-03-29 | 2017-07-28 | 华电电力科学研究院 | A kind of efficient hybrid system of reducing agent ammonia and its method of work for SCR denitrating flue gas |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109173706A (en) * | 2018-09-07 | 2019-01-11 | 西安热工研究院有限公司 | A kind of temperature of the big section flue of denitration, nitric oxide, oxygen multiple spot real-time measurement system |
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Application publication date: 20180508 |