CN208206808U - A kind of measurement power plant's denitrating catalyst is to the device of oxidation rate of sulfur dioxide - Google Patents
A kind of measurement power plant's denitrating catalyst is to the device of oxidation rate of sulfur dioxide Download PDFInfo
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- CN208206808U CN208206808U CN201820902775.1U CN201820902775U CN208206808U CN 208206808 U CN208206808 U CN 208206808U CN 201820902775 U CN201820902775 U CN 201820902775U CN 208206808 U CN208206808 U CN 208206808U
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Abstract
The utility model discloses a kind of measurement power plant's denitrating catalysts to the device of oxidation rate of sulfur dioxide, comprising: gas generating unit comprising multiple bombs and gas mixer, gas mixer input terminal and multiple bomb output ends connect；Reaction unit comprising reactor and the resistance furnace outside reactor, reactor top and gas mixer output end connect；SO3Collection device comprising constant temperature water bath apparatus and the condenser pipe in constant temperature water bath apparatus, condenser pipe input terminal and reactor bottom end connect；SO2Collection device comprising two impact type gas collectors, an impact type gas collector input terminal and condenser pipe output end connect；Titration outfit is the container for being respectively provided with aqueous isopropanol, thoron and barium perchlorate solution.The utility model has the beneficial effects that SO can be collected simultaneously3And SO2, and catalyst is measured to SO2Oxygenation efficiency.
Description
Technical field
The utility model relates to technical field of desulfurization, in particular to a kind of measurement power plant denitrating catalyst to dioxy
Change the device of sulfur oxidation rate.
Background technique
Currently, China's power supply architecture, still based on thermal power generation, the fossil fuels such as coal can generate during burning
The pollutants such as nitrogen oxides, oxysulfide.Control for pollutant, the processing technology routine of mainstream are by SCR (selectivity
Catalysis reduction) device removes NOx, and removes SO by Wet Flue Gas Desulfurization Technique2.But SCR catalyst simultaneously can be to SO2With significant
Catalysed oxidn, and generate SO3Wet desulphurization device in downstream, which is but unable to get, to be effectively removed.SO3In low temperature environment
Lower and water combines, and is condensed into liquid sulfuric acid, corrodes flue and environmental protection equipment or results in blockage, threatens operational safety.
SO3It can all be generated in different locations such as burner hearth, the flues of pulverized coal furnace of hydropower station.Wherein in SCR, denitrating catalyst pair
SO2Oxidation it is fairly obvious, conversion ratio is higher, and there are about 1% or so SO2It is generated in SCR and endangers bigger SO3, it is
Power plant SO3The important sources of generation.The size of specific conversion ratio is influenced by catalyst chemical component first, in denitrating catalyst
Active component V2O5And SO2Following react can occur:
V2O5+SO2→V2O4+SO3
2SO2+O2+V2O4→2VOSO4
2VOSO4→V2O5+SO2+SO3
SO2It is adsorbed on V2O5O in cluster surface, with the V-O-M (M is support oxide metallic atom) of catalyst surface
Atom, which reacts, generates SO3。
Secondly oxygenation efficiency also depends on SO2The factors such as concentration, air speed, flue-gas temperature.Generally, in catalyst V it is negative
Carrying capacity is bigger, flue-gas temperature is higher, air speed is lower, SO3Transformation efficiency it is also higher.
Currently, to SO2Measurement mainly pass through electrochemical method and tested using flue gas analyzer, but due to SO2Easily
It is dissolved in water, precision is ± 5% measured value when low concentration (< 2000ppm), and when concentration is higher (2000-5000ppm), precision
It only can guarantee ± 10% measured value, while measurement result is easy that other gas components are influenced by CO etc., low measurement accuracy.
SO3Since property is more active, easily causes the features such as corroding to equipment, measurement is increasingly complex, generally using following
Three kinds of detection methods:
1, gravimetric method
Referring to SO in " coal-fired flue gas desulfurization equipment performance test method " (GB/T21508) flue gas3The measuring method of concentration.
It is required that carrying out isokinetic sampling to flue gas to dedicated gas sampling device, the serpentine condenser pair of forced circulation is used later
SO3Water-bath control condensation is carried out, barium chloride solution is added to the liquid containing sulfate radical being collected into, the precipitating of generation is carried out
Drying calculates the SO being collected by the weight of barium sulfate to constant3Amount.The operation of this gravimetric method is relatively complicated, the time compared with
It is long.
2, potentiometric titration
Collection method is same as above, to the SO being collected into3Solution carries out constant volume, later using lead electrode as indicator electrode, in pH
Under conditions of=4, the solution containing sulfate ion under 75% alcoholic environment is titrated with lead perchlorate.Excessive lead ion makes
Current potential generates jumping, i.e., it is believed that reaching titration emphasis, calculates SO by the amount of the lead perchlorate standard solution of consumption3Contain
Amount.The instrument that this potentiometric titration is used is more, same complicated for operation.
3, the chromatography of ions
Referring to " the survey of fluorine, chlorine, phosphate radical, nitrite anions, nitrate anion and sulfate radical in industrial circulating cooling water and boiler water
Determine the chromatography of ions " (GB/T14642), the solution containing sulfate ion is injected into sample amounts cup, leacheate is molten by sample
Liquid band enters analytical column, and the anionic radicals such as sulfate radical realize separation according to its retention characteristic difference on analytical column, and are converted into phase
The acid answered, causes conductivity to increase.Response signal is detected by electric conductivity detector, it is qualitative to sulfate ion with retention time, with
Peak height or peak area quantification, to calculate SO3Content.Although this chromatography of ions measurement accuracy rate is high, equipment
Valuableness can only rely on proprietary mechanism and be tested, and not be suitable for the quick detection of colleges and universities and production unit to catalyst performance.
From the point of view of to sum up, to catalyst SO2Or SO3Performance evaluation need referring to other testing standards to measure SO respectively2And
SO3, it is the above two gas of independent measurement, measurement method and standard disunity, can not realizes SO2And SO3It measures simultaneously.
Utility model content
To solve the above problems, the purpose of this utility model is to provide a kind of measurement power plant denitrating catalysts to titanium dioxide
The device of sulfur oxidation rate, based on control condensation method and oxidative absorption method respectively to the SO by catalyst3And SO2It is collected, together
When by the method quantitative analysis of chemistry titration, measure catalyst to SO2Oxygenation efficiency.
The utility model provides a kind of measurement power plant's denitrating catalyst to the device of oxidation rate of sulfur dioxide, comprising:
Gas generating unit comprising be respectively provided with CO2、N2、O2And SO2Multiple bombs and gas mixer, institute
The multiple input terminals for stating gas mixer are connected with multiple bomb output ends respectively, wherein are provided on multiple bombs
Gas flowmeter；
Reaction unit comprising the reactor of quartzy tube body and the resistance furnace being arranged in outside the reactor, it is described
Reactor top is connected with the gas mixer output end, wherein fixed catalyst in the middle part of the reactor, the resistance furnace
On be connected with temperature control system；
SO3Collection device comprising constant temperature water bath apparatus and the condenser pipe in the constant temperature water bath apparatus, it is described
Condenser pipe input terminal is connected with the reactor bottom end；
SO2Collection device comprising two contain 3%H2O2Solution and end to end impact type gas collector, one
Impact type gas collector input terminal is connected with the condenser pipe output end；
Titration outfit is the container for being respectively provided with aqueous isopropanol, thoron and barium perchlorate solution.
It is further improved as the utility model, further includes being connected with another impact type gas collector output end
NaOH air-washer.
It is further improved as the utility model, the condenser pipe is serpentine condenser.
It is further improved as the utility model, the pipe between the reactor output end and the condenser pipe input terminal
Heat tracing is provided on line.
It is further improved as the utility model, ice water is placed in impact type gas collector bottom.
It is further improved as the utility model, the temperature control system includes thermocouple and temperature controller.
It is further improved as the utility model, between the gas mixer output end and the reactor top
Pipeline is equipped with the valve being connected with exhaust gas processing device.
The utility model has the following beneficial effects:
It can be collected separately and measure unreacted SO of the simulated flue gas after denitrating catalyst2And newly-generated SO3, solution
Certainly SO3Property is active, is difficult to the problem of collecting measurement, realizes SO2And SO3It measures in the same system, measuring device letter
It is single, quickly, simplicity, accurately measure catalyst SO2/SO3Conversion ratio provides preliminary analysis method for catalyst performance, reduces the time
Cost and economic cost.
Quantization variety classes denitrating catalyst can quickly be measured to SO2Oxidation, do not need complicated measurement analysis and set
Standby, measuring speed is fast, and it is convenient to operate, and selects SCR catalyst to provide guidance for coal-burning power plant, and be denitrating catalyst SO2Oxidation
Performance test provides technological means.
Experimental condition is variable, is convenient for measuring under different operating conditions catalyst to SO2Oxidability.
Detailed description of the invention
Fig. 1 is a kind of measurement power plant's denitrating catalyst showing to the device of oxidation rate of sulfur dioxide described in the utility model
It is intended to；
Fig. 2 is the schematic diagram of condenser pipe.
In figure,
1, gas flowmeter；2, gas mixer；3, reactor；4, resistance furnace；5, catalyst；6, temperature control system；7, permanent
Warm water bath apparatus；8, condenser pipe；9, impact type gas collector；10, NaOH air-washer；11, valve；12, vent gas treatment fills
It sets.
Specific embodiment
Below by specific embodiment and in conjunction with attached drawing, the utility model is further described in detail.
As shown in Figure 1, a kind of device of the measurement power plant denitrating catalyst of the utility model to oxidation rate of sulfur dioxide, packet
It includes: gas generating unit, reaction unit, SO3Collection device, SO2Collection device and titration outfit.The device is directed to denitration catalyst
Agent is to SO2Oxidation exploitation, can in the present apparatus simultaneously measure denitrating catalyst generation SO3With unreacted SO2, survey
Amount device is simple, operation is convenient, time of measuring is short, without using complicated measuring device, accurately measures catalyst SO2/SO3Conversion ratio,
To catalyst SO2Oxidation susceptibility carries out rapid and convenient analysis.Each specific connection type of device is as follows:
Gas generating unit includes being respectively provided with CO2、N2、O2And SO2Four bombs and gas mixer 2, gas
Four input terminals of mixer 2 are connected with four bomb output ends respectively, wherein are provided with gas stream on four bombs
Meter 1.Pass through the bottled gas simulated flue gas ingredient of high pressure, main gas component CO2、N2、O2、SO2.Using gas flowmeter 1 is adjusted
The road Jie Ge gas component reaches and gas mixer 2 is connected to 3 side of reactor after predetermined gas component.
Reaction unit includes the reactor 3 of quartzy tube body and the resistance furnace 4 that is arranged in outside reactor 3, and reactor 3 pushes up
End is connected with 2 output end of gas mixer, wherein is placed with catalyst 5 in the middle part of reactor 3, and is fixed by silica wool, resistance
Temperature control system 6 is connected on furnace 4.Using 4 heated quartz reactor 3 of resistance furnace, the temperature control of thermocouple and temperature controller composition
The adjustable reaction temperature of system 6, range are 200-400 DEG C.
SO3Collection device includes constant temperature water bath apparatus 7 and the condenser pipe 8 in constant temperature water bath apparatus 7, condenser pipe 8
Input terminal is connected with 3 bottom end of reactor, as shown in Fig. 2, condenser pipe 8 is serpentine condenser.Reactor 3 exports (i.e. output end) even
The serpentine condenser being placed in water-bath heater is connect, the SO generated in the reactor3It condenses and is being centrifuged at a predetermined temperature
It is condensed under power effect on condensation tube wall.Further, it is exported between 8 entrance of condenser pipe (i.e. input terminal) from reactor 3
Pipeline be arranged heat tracing, prevent SO3It condenses in advance.
SO2Collection device includes two and contains 3%H2O2Solution and end to end impact type gas collector 9, a punching
It hits 9 input terminal of formula gas collector to be connected with 8 output end of condenser pipe, gas is collected by two impact type gas collectors 9.Punching
It hits 9 bottom of formula gas collector and places ice water, for cooling down.When passing through if any residual exhaust, further include and another impact type
The connected NaOH air-washer 10 of 9 output end of gas collector.
Titration outfit is the container for being respectively provided with aqueous isopropanol, thoron and barium perchlorate solution.Use conical flask
The aqueous isopropanol that isopropanol makes 80% is added after the two parts being collected into solution constant volume to be measured in equal titration outfits,
Use thoron as indicator, is titrated on titration platform using barium perchlorate solution.
Further, the pipeline between 3 top of 2 output end of gas mixer and reactor is equipped with and exhaust gas processing device
12 connected valves 11 close all devices when not needing measurement, and at this time by valve 11, the tail gas in device is introduced
The processing of exhaust gas processing device 12.
A kind of measurement power plant denitrating catalyst of the utility model to the device of oxidation rate of sulfur dioxide, using quartz ampoule as
Reactor, catalyst are fixed in the middle part of reactor, are heated using tube furnace to reactor.Simulated flue gas is passed through to reaction
Oxidation reaction is carried out in device, and adjustable gas flow velocity, reaction temperature etc. change experimental condition.The gas of generation first pass through by
Spiral (snakelike) condenser pipe of heating water bath separates and collects SO3, other gases are by containing H2O2Impact type gas collection
Device, unreacted SO2It is collected in impact type gas collector.It carries out constant volume titration respectively later, this kind can be calculated and taken off
Denox catalyst SO2Oxygenation efficiency.When measurement specifically includes the following steps:
Step 1, each device required for connection measures, the connection of each device is as described in Example 1, and is passed through nitrogen
It removes residual gas in device unless each and checks the air-tightness of each device.
Step 2, according to 5 space velocities of catalyst fixed in the middle part of reactor 3, total gas flow rate is determined, using filling respectively
There is CO2、N2、O2And SO2Each bomb export mixed gas simulative power plant flue gas, and adjusted respectively according to practical smoke components
The gas flowmeter 1 being arranged on each bomb is saved, CO is adjusted2、 N2、O2And SO2Gas component.
Step 3, mixed gas is entered in reactor 3 by gas mixer 2, and resistance furnace 4 is heated up, and passes through temperature control system
System 6 adjusts temperature range.
Wherein, temperature range may be selected 200-400 DEG C to test under condition of different temperatures catalyst to SO2Oxidisability
Can, emphasis under the conditions of denitrating catalyst actual work temperature to testing.
Step 4,7 temperature of constant temperature water bath apparatus is made to be maintained at 80 DEG C, at this temperature SO3It condenses, and in snakelike condensation
It is attached on tube wall in pipe 8 by centrifugal force effect, other gas components then directly by condenser pipe 8, realize SO3Separation.
Step 5, mixed gas enters two after condenser pipe 8 and contains 3%H2O2The impact type gas collector 9 of solution
In, SO2It is absorbed and is oxidized to sulfate radical collection in the H of impact type gas collector 92O2In solution.
Step 6, it reaches and closes N after subscribing the reaction time2Other gases in addition, and 1min is kept, make in reactor 3
Mixed gas passes through condenser pipe 8 completely, removes the connection of reactor 3 and condenser pipe 8 later.
Step 7, condenser pipe 8 is repeatedly rinsed using deionized water, collects the sulfuric acid being condensate in condenser pipe 8 and constant volume, together
Sample is collected in impact type gas collector 9 and absorbs SO2The H of gas2O2Solution and constant volume.
Step 8, the solution for containing sulfate ion in the two parts being collected into be added isopropanol make 80% it is different
Propanol solution, isopropanol environment can prevent and treat SO2It is oxidized to SO3, reducing may micro existing SO2Experimental result is done
The effect of disturbing adds 2-4 drop thoron as indicator, is titrated with the barium perchlorate solution of calibration, excessive barium ions
Complex compound is formed with thoron, solution can be become pink from bright yellow, show sulfate ion titration completely, i.e., eventually up to titration
Point, to calculate SO in flue gas2And SO3Content, and then calculate SO2Conversion ratio；
Step 9, uncollected sour gas is collected using the NaOH air-washer 10 equipped with NaOH solution, is prevented
Discharge gas pollutes environment.
The utility model can be collected separately and measure unreacted SO of the simulated flue gas after denitrating catalyst2And it is new
The SO of generation3, solve SO3Property is active, is difficult to the problem of collecting measurement, realizes SO2And SO3It is surveyed in the same system
Amount, measuring device is simple, quickly, simplicity, accurately measures catalyst SO2/SO3Conversion ratio provides preliminary point for catalyst performance
Analysis method reduces time cost and economic cost.Quantization variety classes denitrating catalyst can quickly be measured to SO2Oxidation make
With not needing complicated measurement analytical equipment, measuring speed is fast, and it is convenient to operate, and provides finger for coal-burning power plant's selection SCR catalyst
It leads, and is denitrating catalyst SO2Oxidation susceptibility test provides technological means.Experimental condition is variable, is convenient for measuring under different operating conditions
Catalyst is to SO2Oxidability.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (7)
1. a kind of measurement power plant's denitrating catalyst is to the device of oxidation rate of sulfur dioxide characterized by comprising
Gas generating unit comprising be respectively provided with CO2、N2、O2And SO2Multiple bombs and gas mixer (2), it is described
Multiple input terminals of gas mixer (2) are connected with multiple bomb output ends respectively, wherein are provided on multiple bombs
Gas flowmeter (1)；
Reaction unit comprising resistance furnace (4) of the reactor (3) and setting of quartzy tube body outside the reactor (3),
Reactor (3) top is connected with the gas mixer (2) output end, wherein fixed catalytic in the middle part of the reactor (3)
Agent (5) is connected with temperature control system (6) on the resistance furnace (4)；
SO3Collection device comprising constant temperature water bath apparatus (7) and the condenser pipe (8) being located in the constant temperature water bath apparatus (7),
Condenser pipe (8) input terminal is connected with the reactor (3) bottom end；
SO2Collection device comprising two contain 3%H2O2Solution and end to end impact type gas collector (9), one
Impact type gas collector (9) input terminal is connected with the condenser pipe (8) output end；
Titration outfit is the container for being respectively provided with aqueous isopropanol, thoron and barium perchlorate solution.
2. the apparatus according to claim 1, which is characterized in that further include defeated with another impact type gas collector (9)
The connected NaOH air-washer (10) of outlet.
3. the apparatus according to claim 1, which is characterized in that the condenser pipe (8) is serpentine condenser.
4. the apparatus according to claim 1, which is characterized in that reactor (3) output end and the condenser pipe (8) are defeated
Enter and is provided with heat tracing on the pipeline between end.
5. the apparatus according to claim 1, which is characterized in that place ice water in impact type gas collector (9) bottom.
6. the apparatus according to claim 1, which is characterized in that the temperature control system (6) includes thermocouple and temperature control
Instrument.
7. the apparatus according to claim 1, which is characterized in that gas mixer (2) output end and the reactor
(3) pipeline between top is equipped with the valve (11) being connected with exhaust gas processing device (12).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414516A (en) * | 2018-06-12 | 2018-08-17 | 大唐环境产业集团股份有限公司 | It is a kind of to measure device and method of power plant's denitrating catalyst to oxidation rate of sulfur dioxide |
| CN110064302A (en) * | 2019-04-30 | 2019-07-30 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | A kind of honeycomb type denitrification catalyst SO2Oxygenation efficiency real-time on-line detecting method and device |
-
2018
- 2018-06-12 CN CN201820902775.1U patent/CN208206808U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414516A (en) * | 2018-06-12 | 2018-08-17 | 大唐环境产业集团股份有限公司 | It is a kind of to measure device and method of power plant's denitrating catalyst to oxidation rate of sulfur dioxide |
| CN110064302A (en) * | 2019-04-30 | 2019-07-30 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | A kind of honeycomb type denitrification catalyst SO2Oxygenation efficiency real-time on-line detecting method and device |
| CN110064302B (en) * | 2019-04-30 | 2024-03-26 | 中国大唐集团科学技术研究院有限公司华中电力试验研究院 | Honeycomb denitration catalyst SO 2 Real-time on-line detection method and device for oxidation rate |
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