CN204241347U - A kind of Novel wet smoke on-line monitoring system - Google Patents
A kind of Novel wet smoke on-line monitoring system Download PDFInfo
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- CN204241347U CN204241347U CN201420752764.1U CN201420752764U CN204241347U CN 204241347 U CN204241347 U CN 204241347U CN 201420752764 U CN201420752764 U CN 201420752764U CN 204241347 U CN204241347 U CN 204241347U
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Abstract
The utility model relates to the technical field of gas sample, determination and analysis, discloses a kind of Novel wet smoke on-line monitoring system.Prior art cannot carry out on-line monitoring to the wet flue gas particle after wet desulphurization, and the technical solution of the utility model is as follows.It is characterized in that: the gas outlet of carrier gas blower fan (XF), be arranged on the stove pipe at carrier gas heater block (4) place, the input interface of carrier gas variable valve (XTJF), aforementioned three's order gas circuit is communicated with; The output interface of carrier gas variable valve (XTJF) is communicated with mixed gas bucket (3); Sample tracheae (2) is communicated with mixed gas bucket (3) gas circuit; Mixed gas bucket (3) is communicated with one end gas circuit in gas mixing pipe road, and the other end in gas mixing pipe road is communicated with the passive inlet end implication road of ejector (SLQ); The probe of monitor is arranged in gas mixing pipe road.Beneficial effect is: to the wet flue gas particle after wet desulphurization, can realize on-line monitoring at downstream part.
Description
Technical field
The utility model relates to the technical field of gas sample, determination and analysis, particularly relates to a kind of Novel wet smoke on-line monitoring system.
Background technology
Wet desulphurization is the common technology method of administering stationary pollution source; So-called stationary pollution source, such as coal-fired power plant passes through high-temperature flue gas of smoke stack emission etc.
Illustrate.In order to administer the high-temperature flue gas with serious environment pollution, first be tackled the particle of lower most of dust character by the dust arrester in flue, and then removing a large amount of sulfide by the wet desulphurization device in flue.
Through the process of relevant apparatus, the high-temperature flue gas composition after improvement on earth how, should in the downstream of wet desulphurization device, the on-line computing model that particle concentration is set.
The on-line computing model of particle concentration, it generally includes monitor main body and probe (or claiming sensor); Monitor main body can away from high-temperature flue gas, but probe must be stayed among high-temperature flue gas.But, these high-temperature flue gas are entrained with water smoke or are entrained with condensable salt, when high-temperature flue gas by heat meet cold and reduce temperature time, can in probe etc. place, there is condensing drip or occur the situations such as condensation acid droplet, these unfavorable conditions gently then affect the accuracy that monitor detects particle, heavy then monitor cannot normally be worked.
At present, the disposal route of prior art is: in the porch of wet desulphurization device, installs particle concentration on-line computing model.The way that preceding method is actually a caving-in bash, yields to, in fact this way does not record the flue gas situation in wet desulphurization device exit; Prior art is actual, and what detect is wet flue gas particle before wet desulphurization.
Below, the drawback of prior art is further described again.Existing research shows: wet process of FGD is very low to fine particle eliminating efficiency; Further, after the ammonia process of desulfurization, its outlet particle concentration obviously increases, the shape characteristic of particle and element components can great changes will take place before and after desulfurization; For another example, after CaCO3 desulfurization, fine particle is easily desulfurized reaction product and connects or wrap up and form fine and close irregular bulk or aggregate structure, and after desulfurization, in particle, the content of S element obviously increases; After adopting NaOH, CaCO3 and ammoniacal liquor three kinds of method desulfurization, the sulfur content in particle increases to 10.01%, 19.96% and 46.64% respectively by 1.33% before washing.(referring to School of Environment & Energy of the Southeast China University variation characteristic of fine particle " in the wet desulfurization flue gas ").These situations illustrate, are finally discharged into the flue gas in air, realize to its on-line monitoring to being really actual conditions if want, must by the downstream part that be arranged on wet desulphurization device of popping one's head in.
Monitor stationary pollution source is granular material discharged in order to more accurate, need to carry out technological innovation, carry out on-line monitoring to realize the wet flue gas particle after to wet desulphurization.
Prior art cannot carry out on-line monitoring to the wet flue gas particle after wet desulphurization; The technical scheme that the utility model proposes, can realize the wet flue gas particle after wet desulphurization and carry out on-line monitoring.
First, the utility model is made the general description, and interpretation.
The utility model overall plan is described below:
Utility model system comprises automation control circuit, and described control circuit comprises power supply parallel circuit;
Particularly: comprising: carrier gas blower fan XF, carrier gas heater block 4, carrier gas variable valve XTJF, filtering head 1, sample tracheae 2, mixed gas bucket 3, containing the monitor of probe, jet blower SF, jet variable valve STJF, ejector SLQ, and blowback cleaning member; Described ejector SLQ contains initiatively air inlet port, passive air inlet port and air outlet;
Described carrier gas blower fan XF, its air intake opening is communicated with air; The gas outlet of carrier gas blower fan XF, is arranged on the stove pipe at carrier gas heater block 4 place, the input interface of carrier gas variable valve XTJF, and aforementioned three's order gas circuit is communicated with; The output interface of carrier gas variable valve XTJF and mixed gas bucket 3, should both gas circuits be communicated with;
Filtering head 1 is arranged on one end of sample tracheae 2, and the other end of sample tracheae 2 is communicated with mixed gas bucket 3 gas circuit; Mixed gas bucket 3 is communicated with one end gas circuit in gas mixing pipe road, and the other end in gas mixing pipe road is communicated with the passive inlet end implication road of ejector SLQ;
Described jet blower SF, its air intake opening is communicated with air, and its gas outlet is communicated with the input port gas circuit of jet variable valve STJF; The output port of jet variable valve STJF is communicated with the active inlet end implication road of ejector SLQ;
The probe of monitor is arranged in gas mixing pipe road.
The utility model overall plan describes as above; Again the utility model overall plan is explained and explained below.
1. understand see Fig. 2.
2. carrier gas blower fan XF and jet blower SF is air compressor in fact.
3. mixed gas bucket 3 is container bodies of a sealing, and shape can be various, is determined on a case-by-case basis.
4. monitor is instrument wet flue gas particle being carried out to on-line monitoring.
In the utility model, monitor also claims measuring unit CLDY.Monitor comprises monitor main body and probe.The probe of broad sense is exactly sensor, and it comprises: the circuit such as part, and amplification, shaping of popping one's head in; The probe of narrow sense only refers to probe part.
For the probe of broad sense, it is a sensor, and its output signal can monitored instrument main body directly adopt.
For the probe of narrow sense, the electric signal obtained due to probe part is too small and weak and stable not, so also will be equipped with the subsequent conditioning circuits such as amplification, shaping; So when popping one's head in by narrow definition, monitor main body further comprises the subsequent conditioning circuits such as amplification, shaping.
No matter be the probe of broad sense or the probe of narrow sense, probe part is all be positioned at gas mixing pipe road, or say be positioned at dilution sample gas gas by way of part, thus initial, original electric signal can be obtained.
5. the gas that monitor monitors is mixed gas.
Mixed gas is formed by two kinds of gas and vapor permeation, and the first is the original sample gas of coming in from filtering head 1, and the second is the diluents of coming from carrier gas variable valve XTJF output interface.
Carrier gas blower fan XF sucks atmospheric gas and compresses, and the gas after compression heats through carrier gas heater block 4, makes the gas heating after compression.
To come in from filtering head 1, enter the original sample gas gas of mixed gas bucket 3, the diluents of mixed gas bucket 3 of coming from carrier gas variable valve XTJF output interface, enter, should both gases when entering mixed gas bucket 3, their temperature should be made as far as possible close.
Sample gas is diluted, there is the effect reducing condensing drip or condensation acid droplet.Dilution and the double action effect of heating, be in mixed gas bucket 3, or in the follow-up gas circuit of advancing of mixed gas, can avoid completely occurring condensing drip or condensation acid droplet.
6. carrier gas variable valve XTJF, it can regulate the output size of carrier gas.
7. ejector SLQ is the parts without moving parts, and it can work long-time, highly reliable, high temperature resistantly.Ejector SLQ contains three ports, respectively: initiatively air inlet port, passive air inlet port and air outlet.Ejector SLQ, its active air inlet port enters pressurized air and sprays at a high speed from air outlet, thus producing negative pressure at the position of passive air inlet port, the gas outside passive air inlet port is inhaled into continuously, and the gas be inhaled into is again from air outlet in the lump ejection at a high speed.
In normal work, because the position of passive air inlet port creates negative pressure, gas is made to occur directed flowing: filtering head 1 → sample tracheae 2 → mixed gas bucket 3; Also has the air outlet of the passive air inlet port → ejector SLQ of mixed gas bucket 3 → gas mixing pipe road (popping one's head at this pipeline) → ejector SLQ.
8. the air intake opening of jet blower SF sucks atmospheric gas and compresses from air, and pressure gas delivers to the input port of jet variable valve STJF; The output port of jet variable valve STJF is communicated with the active inlet end implication road of ejector SLQ.
Jet variable valve STJF can regulate the pressure gas number entering ejector SLQ active air inlet port, thus the vacuum magnitude of the passive air inlet port of adjustable ejector SLQ, and then have adjusted the uninterrupted of mixed gas.
9., under the common regulating action of carrier gas variable valve XTJF and jet variable valve STJF, realize two kinds of gases and mix in proportion.Aforementioned two kinds of gases are nail and second two kinds of gases: first gas is the original sample gas gas of coming in from filtering head 1; Second gas is from carrier gas variable valve XTJF output interface out and the gas for diluting of having heated, and is referred to as diluents.
10. mixed gas bucket 3 gas is out mixed gas, and it will reduce greatly than the original sample gas concentration of coming in from filtering head 1.
The 11. original sample gas of coming in from filtering head 1, from the carrier gas that the output interface of carrier gas variable valve XTJF is sent out, should both mix in proportion.Owing to mixing in proportion, so after having recorded mixed gas parameter, the parameter of original sample gas just can be extrapolated.
Such as, gas mixes by 1: 3, that is: original sample gas volume is 1, and diluents volume is 3, and both mixed mixed gas volumes are 4, and original sample gas only accounts for 1/4th in mixed gas; If detected mixed gas, if the parameter recorded is 1 unit value concentration value, then can be learnt by reckoning: the parameter of original sample gas is 4 unit concentration values.
Monitor can adopt computer technology, from measuring the parameter that obtains of combination gas, automatically calculates the parameter of original sample gas, and is undertaken showing and record by the parameter after calculating, and this is the way that employing is recommended by the utility model institute.
Certainly, if must show and record the parameter of combination gas by monitor, be also fine, just so-so one, also need manually to convert, then obtain the parameter of original sample gas, this way is not optimum way.
12. from principle, although utility model system according to circumstances can adopt a certain blending ratio; But for the real system in a job, normally determine ratio to offer convenience, avoid confusion like this to work.
The air outlet of 13. ejector SLQ, its gas of discharging, can directly be discharged in air, also can be delivered in high-temperature flue (chimney) by pipeline and discharge.
After 14. monitoring system work a period of times, often at places such as filtering head 1, probes, occur and accumulate some dust, influential system normally, reliably, correctly works.The clean measure that routine techniques adopts is: monitoring system quits work, artificial unloading's related components, and manually carries out cleaning, finally manually ressembles recovery again, then works on.For above-mentioned cleaning, the utility model system adopts full-automatic technology, and speed is fast, and the time is short, does not need staff's hand labour, also makes system more reliable and more stable.
Above the utility model overall plan is described and is explained.Below, the further technical scheme of the utility model is explained and explained.
Further technical scheme 1.
Technical scheme describes.Described blowback cleaning member comprises: containing the electric T-shaped valve STF of first interface S1, the second interface S2 and the 3rd interface S3, and contains the blowback solenoid valve FCF of input interface, output interface; Described gas mixing pipe road comprises anterior pipeline and rear portion pipeline; Mixed gas bucket 3, the anterior pipeline in gas mixing pipe road, the first interface of electric T-shaped valve STF, this three's order gas circuit is communicated with; The second interface S2 of electric T-shaped valve STF, the rear portion pipeline in gas mixing pipe road, the passive air inlet port of ejector SLQ, this three's order gas circuit is communicated with; The 3rd interface S3 of electric T-shaped valve STF is communicated with by the output terminal gas circuit of tracheae with jet variable valve STJF; Described blowback solenoid valve FCF, its input interface is communicated with the input interface gas circuit of carrier gas variable valve XTJF, and its output interface is communicated with the rear portion pipeline gas circuit in gas mixing pipe road; The terminals of electric T-shaped valve STF are electrically connected with automation control circuit; The terminals of blowback solenoid valve FCF are electrically connected with automation control circuit; The probe of monitor is arranged in the rear portion pipeline in gas mixing pipe road.
The description and interpretation of technical scheme.
Composition graphs 1, Fig. 3 and Fig. 4 are described.Fig. 1 is one of schematic diagram of the utility model system, and when the system that have expressed in figure is in monitoring, the trend of each air-flow, each arrow represents the direction of travel of position air-flow; In detail in this figure, blowback solenoid valve FCF closes and cuts off (namely obstructed), and the first interface S1 of electric T-shaped valve STF and the second interface S2 leads directly to, and the 3rd interface S3 closes and cuts off (namely obstructed).Fig. 3 have expressed the trend that system is in blowback when cleaning, relevant gas flow in the schematic diagram three, figure of the utility model system, each arrow represents the direction of travel of position air-flow.Fig. 4 have expressed the trend that system is in blowback when cleaning, relevant gas flow in the schematic diagram four, figure of the utility model system, each arrow represents the direction of travel of position air-flow; This figure is also the equivalent schematic drawing of Fig. 3.
When cleaning is needed, control circuit sends instruction: blowback solenoid valve FCF action, electric T-shaped valve STF action.
Before cleaning action, between the input interface of blowback solenoid valve FCF and output interface, gas circuit is blocked.Before cleaning action, connect between the first interface S1 of electric T-shaped valve STF and the second interface S2; And the 3rd interface S3 both blocked with first interface S1, block with the second interface S2.Situation before cleaning action as shown in Figure 1.Before cleaning action, when system is in normal monitoring state.
After cleaning action, block between the first interface S1 of electric T-shaped valve STF and the second interface S2; And the 3rd interface S3 and first interface S1 connects, and block between the second interface S2.After cleaning action, between the input interface of blowback solenoid valve FCF and output interface, gas circuit is connected.After cleaning action, the gas that carrier gas variable valve XTJF comes, the gas that the first interface S1 of electric T-shaped valve STF comes, after these two strands of gases enter mixed gas bucket 3, again through sample tracheae 2, finally go out from filtering head 1 from inside to outside, the dust on filtering head 1 is removed.After cleaning action, the gas that blowback solenoid valve FCF output interface is come, its powerful position through probe place, makes the dust on probe be removed.Situation after cleaning action as shown in Figure 3.After cleaning action, the namely monitoring of system temporarily stops, and system enters cleaning state.
After cleaning operation, control circuit sends instruction again: blowback solenoid valve FCF and electric T-shaped valve STF all restores to the original state, and system proceeds original monitoring.
Further technical scheme 2.
Technical scheme describes.Described system comprises the first differential pressure pickup YYC detecting carrier gas flow and the second differential pressure pickup EYC detecting mixed gas flow; Described stove pipe is communicated with by connecting tube with the input interface of described carrier gas variable valve XTJF; The first described differential pressure pickup YYC, it is arranged in connecting tube, and its terminals are electrically connected with automation control circuit; The second described differential pressure pickup EYC, it is arranged in gas mixing pipe road, and its terminals are electrically connected with automation control circuit.
The description and interpretation of technical scheme.
For the pipeline that internal diameter size determines, in pipeline, the draught head size at two places, reflects the size of air flow rate in pipeline; Difference is larger, illustrates that flow is larger; It is positive relationship between draught head and flow.If positive relationship is positive line sex ratio, draught head numerical value directly can be converted to flow number, and both conversions are fixing K value relations.
If positive relationship is forward non-linear ratio, when draught head numerical value is converted to flow number, various ways can be adopted to calculate.The most simple and reliable way is, is listed by draught head numerical value from small to large, then incites somebody to action with it flow number one to one and also enumerates out, like this, is aware of a certain draught head numerical value and is also just aware of corresponding flow number.For adopt computer technology or for adopt intellectual technology automation control circuit for, realizing conversion by program is very easily.
If have purchased standardized differential pressure pickup, and requirement to specifications, support the use the pipeline of regulation caliber, when differential pressure pickup obtains pressure drop, corresponding flow number can have been learnt easily.
Utility model content
On-line monitoring cannot be carried out to the wet flue gas particle after wet desulphurization to solve prior art, the utility model proposes following technical scheme.
1. a Novel wet smoke on-line monitoring system, comprises automation control circuit, and described control circuit comprises power supply parallel circuit;
Comprise: carrier gas blower fan, carrier gas heater block, carrier gas variable valve, filtering head, sample tracheae, mixed gas bucket, containing the monitor of probe, jet blower, jet variable valve, ejector, and blowback cleaning member; Described ejector contains initiatively air inlet port, passive air inlet port and air outlet;
Described carrier gas blower fan, its air intake opening is communicated with air; The gas outlet of carrier gas blower fan, is arranged on the stove pipe at carrier gas heater block place, the input interface of carrier gas variable valve, and aforementioned three's order gas circuit is communicated with; The output interface of carrier gas variable valve and mixed gas bucket, should both gas circuits be communicated with;
Filtering head is arranged on one end of sample tracheae, and the other end of sample tracheae is communicated with mixed gas bucket gas circuit; Mixed gas bucket is communicated with one end gas circuit in gas mixing pipe road, and the other end in gas mixing pipe road is communicated with the passive inlet end implication road of ejector;
Described jet blower, its air intake opening is communicated with air, and its gas outlet is communicated with the input port gas circuit of jet variable valve; The output port of jet variable valve is communicated with the active inlet end implication road of ejector;
The probe of monitor is arranged in gas mixing pipe road.
2. the system described in comprises: described blowback cleaning member comprises: containing the electric T-shaped valve of first interface, the second interface and the 3rd interface, and contains the blowback solenoid valve of input interface, output interface;
Described gas mixing pipe road comprises anterior pipeline and rear portion pipeline; Mixed gas bucket, the anterior pipeline in gas mixing pipe road, the first interface of electric T-shaped valve, this three's order gas circuit is communicated with; Second interface of electric T-shaped valve, the rear portion pipeline in gas mixing pipe road, the passive air inlet port of ejector, this three's order gas circuit is communicated with; 3rd interface of electric T-shaped valve is communicated with the output terminal gas circuit of jet variable valve by tracheae;
Described blowback solenoid valve, its input interface is communicated with the input interface gas circuit of carrier gas variable valve, and its output interface is communicated with the rear portion pipeline gas circuit in gas mixing pipe road;
The terminals of electric T-shaped valve are electrically connected with automation control circuit; The terminals of blowback solenoid valve are electrically connected with automation control circuit;
The probe of monitor is arranged in the rear portion pipeline in gas mixing pipe road.
3. the system described in comprises the first differential pressure pickup detecting carrier gas flow and the second differential pressure pickup detecting mixed gas flow;
Described stove pipe is communicated with by connecting tube with the input interface of described carrier gas variable valve; The first described differential pressure pickup, it is arranged in connecting tube, and its terminals are electrically connected with automation control circuit;
The second described differential pressure pickup, it is arranged in gas mixing pipe road, and its terminals are electrically connected with automation control circuit.
4. the system described in comprises: detect the first temperature sensor of carrier gas temperature and detect the second temperature sensor of mixture temperature;
Described stove pipe is communicated with by connecting tube with the input interface of described carrier gas variable valve; The first described temperature sensor, it is arranged on connecting tube place, and its terminals are electrically connected with automation control circuit;
The second described temperature sensor, it is arranged on gas mixing pipe road place, and its terminals are electrically connected with automation control circuit;
Described carrier gas heater block comprises electrical heating elements, and electrical heating elements is electrically connected with automation control circuit.
The beneficial effects of the utility model are:
To the wet flue gas particle after wet desulphurization, on-line monitoring can be realized at downstream part.
In the method, in order to avoid the impact that condensing drip or condensation acid droplet are measured particle, special process has been carried out to sample gas, that is: sample gas heated and dilute, thus ensure that sample gas is in the process of transmission, monitoring, do not produce new particle, do not produce particle deposition, yet frozen-free accumulation.
Further, system the oneself of intermittent can carry out the cleaning of short time; Eliminate the out of service for a long time and cleaning that is that could carry out after dismantling of whole system.
Accompanying drawing explanation
Fig. 1 is one of schematic diagram of the utility model system, and when the system that have expressed in figure is in monitoring, the trend of each air-flow, each arrow represents the direction of travel of position air-flow; In detail in this figure, blowback solenoid valve FCF closes and cuts off (namely obstructed), and the first interface S1 of electric T-shaped valve STF and the second interface S2 is straight-through, the 3rd interface S3 closes and cuts off (namely obstructed);
Fig. 2 is the trend that have expressed system when being in monitoring, each air-flow in the schematic diagram two, figure of the utility model system, and each arrow represents the direction of travel of position air-flow; This figure is also the equivalent schematic drawing of Fig. 1;
Fig. 3 have expressed the trend that system is in blowback when cleaning, relevant gas flow in the schematic diagram three, figure of the utility model system, each arrow represents the direction of travel of position air-flow;
Fig. 4 have expressed the trend that system is in blowback when cleaning, relevant gas flow in the schematic diagram four, figure of the utility model system, each arrow represents the direction of travel of position air-flow; This figure is also the equivalent schematic drawing of Fig. 3;
Fig. 5 is the schematic diagram five of the utility model system.
Number in the figure explanation
1. filtering head; 2. sample tracheae; 3. mixed gas bucket; 4. carrier gas heater block; 5. toxic emission chimney; CLDY. measuring unit; FCF. blowback solenoid valve; S1. first interface; S2. the second interface; S3. the 3rd interface; SF. jet blower; STJF. jet variable valve; SLQ. ejector; STF. electric T-shaped valve; XF. carrier gas blower fan; XTJF. carrier gas variable valve; YYC. the first differential pressure pickup; EYC. the second differential pressure pickup; YWC. the first temperature sensor; EWC. the second temperature sensor.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment
Embodiment one
Composition graphs 2, is described.Fig. 2 is the trend that have expressed system when being in monitoring, each air-flow in the schematic diagram two, figure of the utility model system; Each arrow represents the direction of travel of position air-flow.Number in the figure illustrates: 1. filtering head; 2. sample tracheae; 3. mixed gas bucket; 4. carrier gas heater block; CLDY. measuring unit; SF. jet blower; STJF. jet variable valve; SLQ. ejector; XF. carrier gas blower fan; XTJF. carrier gas variable valve.
When system is in monitoring, carrier gas blower fan XF compresses from air suction gas, and thus, gas nature is walked from the place that the ground directional pressure that pressure is high is low; Arrived carrier gas heater block 4 whereabouts, gas, while walking, is also heated.Carrier gas variable valve XTJF, what its input end was come in compressed and by the diluents of heat temperature raising, high temperature dilution gas is sent into mixed gas bucket 3 by pipeline by its output terminal, and carrier gas variable valve XTJF can regulate the airshed size of the diluents flowed through herein.
Original high temperature wet flue gas, also known as sample gas, it is under the effect of negative pressure, enters mixed gas bucket 3 through filtering head 1 and sample tracheae 2.Two kinds of gases mix in mixed gas bucket 3, and flow under suction function in gas mixing pipe road, and the gas namely in gas mixing pipe road is mixed gas.Mixed gas is mixed with two kinds of gases: sample gas and diluents.
Mixed gas, the temperature close of its temperature and sample gas, its concentration is significantly less than the concentration of sample gas.
Illustrate concentration levels.Such as, mix with the ratio of 1 to 2, namely sample gas gas is 1 volume unit, and carrier gas gas is 2 volume units, and like this, the concentration of mixed gas is reduced to 1/3rd of original sample gas concentration.
In above-mentioned introduction, mixed gas, the temperature close of its temperature and sample gas, its concentration ratio sample gas reduces greatly, under such double action, no matter be in mixed gas bucket 3, or in the follow-up gas circuit of advancing of mixed gas, be included in detection probe place, all can avoid completely occurring condensing drip or condensation acid droplet.Detection probe is positioned at gas mixing pipe road.
Jet blower SF suction gas compressing from air, pressure gas delivers to the input port of jet variable valve STJF; The output port of jet variable valve STJF is communicated with the active inlet end implication road of ejector SLQ.Jet variable valve STJF can regulate the pressure gas number entering ejector SLQ active air inlet port, thus the vacuum magnitude of the passive air inlet port of adjustable ejector SLQ.
Pressurized air enters the active air inlet port of ejector SLQ, then pressurized air is from the air outlet ejection at a high speed of ejector SLQ, thus produce negative pressure at the position of passive air inlet port, attract the gas outside passive air inlet port to be inhaled into continuously, the gas be inhaled into sprays at a high speed in the lump from air outlet again.
In normal work, because the position of passive air inlet port creates negative pressure, sample gas gas is made to occur directed flowing: filtering head 1 → sample tracheae 2 → mixed gas bucket 3.After sample gas and diluents mix in mixed gas bucket 3, equally under the effect of negative pressure, there is directed flowing in mixed gas: the air outlet of the passive air inlet port → ejector SLQ of mixed gas bucket 3 → gas mixing pipe road → ejector SLQ.
Filtering head 1 is arranged in gas mixing pipe road, and continuously flow around it mixed gas; So, comprise the monitor of filtering head 1, the constituent data of mixed gas can be detected in real time, online, continuously, after converting, learn the constituent data of original wet flue gas.
Embodiment two
Composition graphs 3, Fig. 4 are described.Fig. 3 have expressed the trend that system is in blowback when cleaning, relevant gas flow in the schematic diagram three, figure of the utility model system, each arrow represents the direction of travel of position air-flow.Fig. 4 have expressed the trend that system is in blowback when cleaning, relevant gas flow in the schematic diagram four, figure of the utility model system, each arrow represents the direction of travel of position air-flow; This figure is also the equivalent schematic drawing of Fig. 3.
Number in the figure illustrates: 1. filtering head; 2. sample tracheae; 3. mixed gas bucket; 4. carrier gas heater block; 5. toxic emission chimney; CLDY. measuring unit; FCF. blowback solenoid valve; S1. first interface; S2. the second interface; S3. the 3rd interface; SF. jet blower; STJF. jet variable valve; SLQ. ejector; STF. electric T-shaped valve; XF. carrier gas blower fan; XTJF. carrier gas variable valve.
After monitoring system work a period of time, often at places such as filtering head 1, probes, occur and accumulation dust, influential system normally, reliably, correctly works.And the utility model system the oneself of intermittent can carry out the cleaning of short time, and cleaning is full-automation carries out.Situation is described below further.
When cleaning is needed, control circuit sends instruction: blowback solenoid valve FCF action, electric T-shaped valve STF action.
Before cleaning action, situation is: between the input interface of blowback solenoid valve FCF and output interface, gas circuit is blocked.Connect between the first interface S1 of electric T-shaped valve STF and the second interface S2; And the 3rd interface S3 both blocked with first interface S1, block with the second interface S2.Situation before above-mentioned cleaning action, can also understand see Fig. 1 and Fig. 2.
After cleaning action starts, situation is: between the input interface of blowback solenoid valve FCF and output interface, gas circuit is connected.Block between the first interface S1 of electric T-shaped valve STF and the second interface S2; 3rd interface S3 and first interface S1 connects, and blocks between the 3rd interface S3 and the second interface S2.Situation after above-mentioned cleaning action, can also understand see Fig. 3 and Fig. 4.
During cleaning action, the gas that carrier gas variable valve XTJF comes, the gas that the first interface S1 of electric T-shaped valve STF comes, after these two strands of gases enter mixed gas bucket 3, again through sample tracheae 2, finally go out from filtering head 1 from inside to outside, the dust on filtering head 1 is removed.
During cleaning action, the gas that blowback solenoid valve FCF output interface is come, its powerful position through probe place, makes the dust on probe be removed.
After cleaning operation completes, control circuit sends instruction again: blowback solenoid valve FCF and electric T-shaped valve STF all restores to the original state, and system proceeds original monitoring.
Embodiment three
Read and understand the content of the present embodiment three, should read fully this instructions content before this and understand.
Composition graphs 5 is described.Label declaration in figure: 1. filtering head; 2. sample tracheae; 3. mixed gas bucket; 4. carrier gas heater block; 5. toxic emission chimney; CLDY. measuring unit; FCF. blowback solenoid valve; S1. first interface; S2. the second interface; S3. the 3rd interface; SF. jet blower; STJF. jet variable valve; SLQ. ejector; STF. electric T-shaped valve; XF. carrier gas blower fan; XTJF. carrier gas variable valve; YYC. the first differential pressure pickup; EYC. the second differential pressure pickup; YWC. the first temperature sensor; EWC. the second temperature sensor.
The utility model system of the present embodiment three shown in Fig. 5, can carry out for a long time online, in real time, continuous print monitoring, also interval character can carry out the cleaning operation of short time.
First temperature sensor YWC, for detecting gas temperature, namely detects the diluents temperature after carrier gas heater block 4 is heated.If the temperature of carrier gas exceedes the setting upper limit, then carrier gas heater block 4 minimizing adds heat or suspends heating; If the temperature of carrier gas is not higher than exceeding the setting upper limit and being not less than setting lower limit, then to keep current heating state constant; If the temperature of carrier gas lower than setting lower limit, then needs to continue to heat to improve temperature or improve to heat class to improve temperature.
Second temperature sensor EWC is for detecting gas temperature, and it is arranged in gas mixing pipe road, to monitor that in pipeline, mixed gas temperature is suitable, is not less than a certain temperature value, thus avoids occurring condensing drip or condensation acid droplet.In the process of system Installation and Debugging, when finding that mixed gas temperature is on the low side, the technical measures that automation control circuit can adopt, a kind of way improves the intensity of heating of carrier gas heater block 4; Another kind of way is that carrier gas heater block 4 intensity of heating is constant and reduce the flow of mixed gas.Reduce the flow of mixed gas, can by regulating carrier gas variable valve XTJF and regulating jet variable valve STJF to realize; Aforementioned two valves all participate in regulating, and can reduce the flow of mixed gas, improve the temperature of mixed gas, and mixing ratio can be kept constant.Under the condition of heating that carrier gas heater block 4 is set, the lower then temperature of carrier gas flow is higher, thus makes the temperature of mixed gas higher.
Two differential pressure pickups can detect the gas flow of position, and the parameter feedback obtained to automation control circuit; According to these parameters, automation control circuit can carry out the running of whole system well.
Claims (4)
1. a Novel wet smoke on-line monitoring system, comprises automation control circuit, and described control circuit comprises power supply parallel circuit;
It is characterized in that: comprising: carrier gas blower fan (XF), carrier gas heater block (4), carrier gas variable valve (XTJF), filtering head (1), sample tracheae (2), mixed gas bucket (3), containing the monitor of probe, jet blower (SF), jet variable valve (STJF), ejector (SLQ), and blowback cleaning member; Described ejector (SLQ) is containing active air inlet port, passive air inlet port and air outlet;
Described carrier gas blower fan (XF), its air intake opening is communicated with air; The gas outlet of carrier gas blower fan (XF), is arranged on the stove pipe at carrier gas heater block (4) place, the input interface of carrier gas variable valve (XTJF), and aforementioned three's order gas circuit is communicated with; The output interface of carrier gas variable valve (XTJF) and mixed gas bucket (3), should both gas circuits be communicated with;
Filtering head (1) is arranged on one end of sample tracheae (2), and the other end of sample tracheae (2) is communicated with mixed gas bucket (3) gas circuit; Mixed gas bucket (3) is communicated with one end gas circuit in gas mixing pipe road, and the other end in gas mixing pipe road is communicated with the passive inlet end implication road of ejector (SLQ);
Described jet blower (SF), its air intake opening is communicated with air, and its gas outlet is communicated with the input port gas circuit of jet variable valve (STJF); The output port of jet variable valve (STJF) is communicated with the active inlet end implication road of ejector (SLQ);
The probe of monitor is arranged in gas mixing pipe road.
2. a kind of Novel wet smoke on-line monitoring system according to claim 1, is characterized in that:
Described blowback cleaning member comprises: containing the electric T-shaped valve (STF) of first interface (S1), the second interface (S2) and the 3rd interface (S3), and contains the blowback solenoid valve (FCF) of input interface, output interface;
Described gas mixing pipe road comprises anterior pipeline and rear portion pipeline; Mixed gas bucket (3), the anterior pipeline in gas mixing pipe road, the first interface (S1) of electric T-shaped valve (STF), this three's order gas circuit is communicated with; Second interface (S2) of electric T-shaped valve (STF), the rear portion pipeline in gas mixing pipe road, the passive air inlet port of ejector (SLQ), this three's order gas circuit is communicated with; 3rd interface (S3) of electric T-shaped valve (STF) is communicated with by the output terminal gas circuit of tracheae with jet variable valve (STJF);
Described blowback solenoid valve (FCF), its input interface is communicated with the input interface gas circuit of carrier gas variable valve (XTJF), and its output interface is communicated with the rear portion pipeline gas circuit in gas mixing pipe road;
The terminals of electric T-shaped valve (STF) are electrically connected with automation control circuit; The terminals of blowback solenoid valve (FCF) are electrically connected with automation control circuit;
The probe of monitor is arranged in the rear portion pipeline in gas mixing pipe road.
3. a kind of Novel wet smoke on-line monitoring system according to claim 1, is characterized in that: described system comprises the first differential pressure pickup (YYC) detecting carrier gas flow and the second differential pressure pickup (EYC) detecting mixed gas flow;
Described stove pipe is communicated with by connecting tube with the input interface of described carrier gas variable valve (XTJF); Described the first differential pressure pickup (YYC), it is arranged in connecting tube, and its terminals are electrically connected with automation control circuit;
Described the second differential pressure pickup (EYC), it is arranged in gas mixing pipe road, and its terminals are electrically connected with automation control circuit.
4. a kind of Novel wet smoke on-line monitoring system according to claim 1, is characterized in that: described system comprises: detect first temperature sensor (YWC) of carrier gas temperature and detect second temperature sensor (EWC) of mixture temperature;
Described stove pipe is communicated with by connecting tube with the input interface of described carrier gas variable valve (XTJF); Described the first temperature sensor (YWC), it is arranged on connecting tube place, and its terminals are electrically connected with automation control circuit;
Described the second temperature sensor (EWC), it is arranged on gas mixing pipe road place, and its terminals are electrically connected with automation control circuit;
Described carrier gas heater block (4) comprises electrical heating elements, and electrical heating elements is electrically connected with automation control circuit.
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| CN105092641A (en) * | 2015-08-14 | 2015-11-25 | 中国石油化工股份有限公司 | Test device and test method of spontaneous ignition point of gas or liquid in high pressure oxygen-enriched environment |
| CN105675810A (en) * | 2016-01-18 | 2016-06-15 | 南京博沃科技发展有限公司 | System and method for monitoring high-temperature corrosive atmosphere of water cooling wall of boiler |
| CN105699259A (en) * | 2014-11-29 | 2016-06-22 | 上海北分仪器技术开发有限责任公司 | Online monitoring system for wet flue gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105699259A (en) * | 2014-11-29 | 2016-06-22 | 上海北分仪器技术开发有限责任公司 | Online monitoring system for wet flue gas |
| CN105092641A (en) * | 2015-08-14 | 2015-11-25 | 中国石油化工股份有限公司 | Test device and test method of spontaneous ignition point of gas or liquid in high pressure oxygen-enriched environment |
| CN105675810A (en) * | 2016-01-18 | 2016-06-15 | 南京博沃科技发展有限公司 | System and method for monitoring high-temperature corrosive atmosphere of water cooling wall of boiler |
| CN107238519A (en) * | 2016-03-29 | 2017-10-10 | 上海北分科技股份有限公司 | A kind of constant speed flue gas sampling detecting system |
| CN107238559A (en) * | 2016-03-29 | 2017-10-10 | 上海北分科技股份有限公司 | A kind of constant speed flue gas sampling detection device |
| CN107238518A (en) * | 2016-03-29 | 2017-10-10 | 上海北分科技股份有限公司 | A kind of constant speed flue gas sampling detection means |
| CN110044781A (en) * | 2019-05-06 | 2019-07-23 | 西安交通大学 | The on-line detecting system and method for ultra-fine multi-modal particle object particle diameter distribution in high-temperature flue gas |
| CN110044781B (en) * | 2019-05-06 | 2020-04-28 | 西安交通大学 | Online detection system and method for particle size distribution of ultrafine modal particles in high-temperature flue gas |
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Address after: 201202 Shanghai City, Pudong New Area Chuansha new town of Sichuan Road No. 508 Building 1 floor 1 Patentee after: Shanghai North Branch Polytron Technologies Inc Address before: 201202 Shanghai City, Pudong New Area Chuansha new town of Sichuan Road No. 508 Building 1 floor 1 Patentee before: Shanghai Baif Instrument Technology Development Co., Ltd. |
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