CN204758348U - Denitration flue gas on -line monitoring system sample dust removal purification device - Google Patents
Denitration flue gas on -line monitoring system sample dust removal purification device Download PDFInfo
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- CN204758348U CN204758348U CN201520481417.4U CN201520481417U CN204758348U CN 204758348 U CN204758348 U CN 204758348U CN 201520481417 U CN201520481417 U CN 201520481417U CN 204758348 U CN204758348 U CN 204758348U
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Abstract
The utility model discloses a denitration flue gas on -line monitoring system sample dust removal purification device, include and is kept apart for the rose box of former smoke -box with clean smoke -box by isolating device that the rose box links to each other with blowback air supply control system, blowback air supply control system includes differential pressure detector and pulse control appearance, the malleation side -draw appearance union coupling of differential pressure detector the former smoke -box of rose box, negative pressure side -draw appearance union coupling the clean smoke -box of rose box, the differential pressure detector generates blowback command signal according to the differential pressure rising condition and delivers to the pulse control appearance, and it is right that the blowback air supply is opened to the pulse control appearance rigid surface filter carries out the blowback. Denitration flue gas on -line monitoring system's timing blowback instruction is still received to the pulse control appearance to blowback disabler during differential pressure measurement appearance trouble, get into the flue gas of the former smoke -box of rose box, take from a plurality of sample points of deNOx systems flue. The utility model has the advantages of it is accurate that reliable, the artifical maintenance of sample flue gas dust removal function volume is little, the flue gas is measured.
Description
Technical field
The utility model relates to smoke on-line monitoring system technical field, is specifically related to a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device.
Background technology
The major function of denitration smoke on-line monitoring system (being called for short CEMS, the i.e. abbreviation of English ContinuousEmissionMonitoringSystem) is the concentration of gaseous contaminant and oxides of nitrogen in monitoring flue gas.Nitrous oxides concentration signal both for monitoring, also sprayed ammonia varitrol for denitration.
Denitration flue gas CEMS sampling spot is positioned at the flue before fly-ash separator, flue gas dust burdening is large, conventional filtrating smoke dust method adopts millipore filter (as: ceramic element), configuration normal temperature blowback source of the gas, aperture in millipore filter is easily blocked, blowback source of the gas can only blow part flue dust off, simultaneously, the blowback time long (reaching tens seconds to several minutes), blowback air source temperature is low, attachment part flue dust is on the filter met cryogenic gas and is easily lumpd and not easily blow off, the gas ability of crossing of filtrator declines gradually, filtrator need be removed by human at periodic intervals thoroughly to clear up, affect the continuous operation of denitration flue gas CEMS and the automatic input rate of denitration spray ammonia varitrol, add the labour intensity of personnel, affect the safe and stable operation of denitrating system, sometimes the discharge beyond standards of oxides of nitrogen is caused.
A kind of denitration CEMS how is provided to sample flue-gas dust removal and purification device, realizing the reliability that sampling flue gas ash removal reliable in function, blowback time are short, do not need labor cleaning's filtrator, improve denitration flue gas CEMS, is those skilled in the art's technical matterss urgently to be resolved hurrily.
Utility model content
For solving the deficiency that prior art exists, the utility model discloses a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device, realize the reliability that sampling flue gas ash removal reliable in function, blowback time are short, do not need labor cleaning's filtrator, improve denitration CEMS.
For achieving the above object, concrete scheme of the present utility model is as follows:
A kind of denitration smoke on-line monitoring system sampling dedusting and purifying device, comprise the Rose Box that isolated device is isolated into former smoke-box and clean smoke-box, Rose Box is connected with blowback air source control system; Blowback air source control system comprises differential pressure measuring instrument and pulse control instrument, the malleation side stopple coupon of described differential pressure measuring instrument connects the former smoke-box of described Rose Box, suction side stopple coupon connects the clean smoke-box of described Rose Box, described differential pressure measuring instrument generates blowback command signal according to differential pressure rising condition and delivers to pulse control instrument, and pulse control instrument is opened blowback source of the gas and carried out blowback to described rigid surface filter.
Described clean smoke-box is connected with denitration smoke on-line monitoring system sampling probe, and former flue gas enters clean smoke-box after rigid surface filter dedusting, enters denitration smoke on-line monitoring system sampling probe through clean smoke-box.
The malleation side stopple coupon of described differential pressure measuring instrument connects the former smoke-box of described Rose Box through anti-blocking sampler.
Described blowback air source control system also comprises electromagnetic impulse valve, injection tube and Venturi tube, pulse control instrument converts blowback command signal to electromagnetic pulse signal and delivers to electromagnetic impulse valve and makes it to open, and blowback source of the gas carries out blowback through injection tube and Venturi tube to described rigid surface filter.
Described spacer assembly comprises card, diaphragm seal, rigid surface filter and pressing plate, described card is connected with Rose Box inwall, diaphragm seal is provided with between the top that rigid surface filter is thicker and card, described pressing plate to be fixed on card and to push down the thicker top of described rigid surface filter, makes top that rigid surface filter is thicker, diaphragm seal and card compact siro spinning technology under pressure.Perforate on card, the size in hole meet the thinner filtering bodies of described rigid surface filter stretch into former smoke-box by this hole and the thicker top of rigid surface filter not by this hole.
Described rigid surface filter outside surface and Rose Box are encircled into former smoke-box, and inside surface and Rose Box, card are encircled into clean smoke-box.
The Long-term service temperature that described rigid surface filter tolerates is higher than the maximum temperature of former flue gas normal operation period.
Described blowback source of the gas first heats through electric heater before entering clean smoke-box, and the gas temperature after heating is not less than 150 DEG C, and to prevent, blowback air source temperature is too low affects blowback dust removing effects or infringement filtrator.
Described rigid surface filter is vertically placed, and during filtrator blowback, dust is fallen to enter flue to be taken away by flue gas.
Described pulse control instrument also receives the timing blowback instruction of denitration smoke on-line monitoring system, in order to avoid described differential pressure measurement instrument fault blowing function lost efficacy.
Enter the flue gas of the former smoke-box of described Rose Box, take from multiple sampling spots of denitrating system flue, sampling spot is connected with former gas sampling probe, the former flue gas that multiple sampling spot obtains converges rear portion flue gas and enters the former smoke-box of described Rose Box, part of smoke is exported by former smoke-box and enters boiler air preheater exhaust pass or induced draft fan gas approach, so that former flue gas continues flowing under suction function; Former Gas phase Smoke after multidraw converges more can reflect the truth of flue gas than some sampling.
Described Rose Box shell place installs auxiliary heating device additional.
The electric heater of described blowback source of the gas comprises: heating cabinet, the side of heating cabinet is connected with blowback source of the gas draft tube, the opposite side of heating cabinet is connected with blowback source of the gas escape pipe, be provided with temperature element and electrical heating elements in heating cabinet, temperature element and electrical heating elements are connected with electric heating control case respectively.
Blowback source of the gas (i.e. pressurized air) first enters heating cabinet by draft tube, heating, temperature element is provided with in heating cabinet, electric heating control case controls exerting oneself of electrical heating elements according to the measured value of temperature element, purge gas is heated, as: design temperature is 150 DEG C, and the gas after heating accesses clean smoke-box by escape pipe.It should be noted that, heating cabinet, escape pipe should carry out insulation and as far as possible near clean smoke-box, possess higher temperature to keep blowback source of the gas.
Former gas sampling probe, according to pipeline rout, keeps with surface level the degree of tilt being not less than 5 °.
Flue outside after the shell of described Rose Box, former gas sampling probe and former smoke-box outlet at bottom need carry out installing the insulation of auxiliary heating device additional, guarantees that flue-gas temperature is not less than 150 DEG C.
The beneficial effects of the utility model:
The utility model adopts the rigid surface filter of high temperature resistant flue gas (as: Britain produces too cotton high-temperature gas filter) to carry out udst separation to the sampling flue gas of denitration smoke on-line monitoring system, adopt electromagnetic impulse valve to control blowback source of the gas and blowback is carried out to filtrator, the dust being attached to filter surfaces can blow off by a blowback, good dedusting effect; The blowback time is as short as 0.15 second to 0.3 second, and filtrator not easily blocks, and reliability is high, does not need labor cleaning's filtrator, and denitration smoke on-line monitoring system long-term stability is run, and is conducive to denitration spray ammonia varitrol and runs under automated manner.
The utility model blowback source of the gas first heater via before entering clean smoke-box heats, and the gas temperature after heating is not less than 150 DEG C, can prevent blowback air source temperature too low affect blowback dust removing effects or infringement filtrator.
Smoke sampling dedusting and purifying device described in the utility model possesses timing blowback and filter pressure difference height blowing function, and blowback reliability is high, thus ensure that the reliability service of denitration smoke on-line monitoring system.
The flue gas of the former smoke-box of Rose Box described in the utility model, take from multiple sampling spots of denitrating system flue, as: 3, converge rear portion flue gas and enter the former smoke-box of described Rose Box, a part enters boiler air preheater exhaust pass or induced draft fan gas approach, so that flue gas continues flowing under suction function, the former Gas phase Smoke after multidraw converges more can reflect the truth of flue gas than some sampling, make Test Data of Cigarette Smoke in time, accurately, shorten the response time of denitration spray ammonia varitrol.
Accompanying drawing explanation
Fig. 1 is a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device structural representation disclosed in embodiment;
Fig. 2 is blowback source of the gas electric heater structure schematic diagram disclosed in embodiment.
In figure, 1, Rose Box, 2, rigid surface filter, 3, diaphragm seal, 4, pressing plate, 5, card, 6, former smoke-box, 7, clean smoke-box, 8, denitration smoke on-line monitoring system sampling probe, 9, differential pressure measuring instrument, 10, pulse control instrument, 11, electromagnetic impulse valve, 12, injection tube, 13, Venturi tube, 14, malleation side stopple coupon, 15, anti-blocking sampler, 16, suction side stopple coupon, 17, electric heater, 18, former smoke-box outlet at bottom, 19, the timing blowback command signal of denitration smoke on-line monitoring system, 20, first former gas sampling probe, 21, second former gas sampling probe, 22, 3rd former gas sampling probe,
2-1, blowback source of the gas draft tube, 2-2, heating cabinet, 2-3, electrical heating elements, 2-4, temperature element, 2-5, electric heating control case, 2-6, blowback source of the gas escape pipe.
Embodiment:
Below in conjunction with accompanying drawing, the utility model is described in detail:
As Fig. 1 a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device structural representation disclosed in the utility model embodiment, comprise Rose Box 1, rigid surface filter 2 (as: too cotton high-temperature gas filter) is provided with in Rose Box, diaphragm seal 3, pressing plate 4 and card 5, rigid surface filter 2, Rose Box 1 is isolated into former smoke-box and clean smoke-box by diaphragm seal 3 and card 5 under the pressure effect of pressing plate 4, described rigid surface filter 2 outside surface and Rose Box 1 are encircled into former smoke-box 6, described rigid surface filter 2 inside surface and Rose Box 1, card 5 is encircled into clean smoke-box 7, clean smoke-box 7 is connected with denitration smoke on-line monitoring system sampling probe 8, former flue gas enters clean smoke-box 7 after the dedusting of rigid surface filter 2, denitration smoke on-line monitoring system sampling probe 8 is entered through clean smoke-box, differential pressure measuring instrument 9, pulse control instrument 10, electromagnetic impulse valve 11, injection tube 12 and Venturi tube 13 form blowback air source control system, the malleation side stopple coupon 14 of described differential pressure measuring instrument 9 connects former smoke-box 6 through anti-blocking sampler 15, suction side stopple coupon 16 connects clean smoke-box 7, differential pressure measuring instrument 9 generates blowback command signal according to the differential pressure rising condition between former smoke-box and clean smoke-box and delivers to pulse control instrument 10, blowback command signal is converted to electromagnetic pulse signal and delivers to electromagnetic impulse valve 11 and make it to open by pulse control instrument, blowback source of the gas carries out blowback through injection tube 12 and Venturi tube 13 to rigid surface filter 2.Venturi tube 13 is placed on the top of rigid surface filter 2.
It should be noted that the Long-term service temperature that rigid surface filter 2 tolerates should higher than the maximum temperature of former flue gas normal operation period.As: at 300 DEG C to 400 DEG C the former flue-gas temperature of denitrating system, the Long-term service temperature of the rigid surface filter tolerance of selecting should be greater than 400 DEG C, in order to avoid filtrator overtemperature damages.At present, China market has company and provides high temperature resistant rigid surface filter, such as: the too cotton high-temperature gas filter that Tai Mian company of Britain produces can the flue-gas temperature of withstand long term exposure 1600 DEG C.
Blowback source of the gas first heats through electric heater 17 before entering clean smoke-box 7, and the gas temperature after heating is not less than 150 DEG C, and to prevent, blowback air source temperature is too low affects blowback dust removing effects or infringement filtrator.
Rigid surface filter 2 needs vertical placement, dust can be made to fall enter flue by former smoke-box outlet at bottom 18 to be taken away by the flue gas flowed during filtrator blowback.
Rigid surface filter 2 is actually a circular sack, sack position is larger, be stuck in the top of card 5 perforate, bag is exposed at the bottom in hole, be the O-ring seal (or diaphragm seal 3) of a circle between bag mouth and card 5, pressing plate 4 also can be circular, pushes down bag mouth, bag mouth pushes down O-ring seal (or diaphragm seal 3), and diaphragm seal is pressed on card 5.
Pulse control instrument 10 also receives the timing blowback command signal 19 of denitration smoke on-line monitoring system, in order to avoid differential pressure measurement instrument 9 fault causes blowing function to lose efficacy.The differential pressure height signal that the timing blowback instruction 19 of denitration smoke on-line monitoring system and differential pressure measurement instrument 9 generate also is connected in the enabling signal input end of pulse control instrument 10, and detailed connection can with reference to the pulse control instrument instructions of practical application.
Enter the former flue gas of former smoke-box 6, desirable multiple sampling spots from denitrating system flue, as: 3, the former Gas phase Smoke after multidraw converges more can reflect the truth of flue gas than some sampling.From the first former gas sampling probe 20, second former gas sampling probe 21, former smoke-box 6 is entered after three strands of flue gases of the 3rd former gas sampling probe 22 converge, a small amount of flue gas enters clean smoke-box 7 through rigid surface filter 2, all the other flue gases are through former smoke-box outlet at bottom 18, enter boiler air preheater exhaust pass or induced draft fan gas approach, to keep flue gas to continue flowing under suction function.
It should be noted that, former gas sampling probe 20,21,22, when the flue after former smoke-box outlet at bottom 18 lays, according to pipeline rout, need consider to keep with surface level the degree of tilt being not less than 5 °, make dust stratification or cryogenic temperature condensation flow direction flue collector in pipeline; The outsides such as the flue after Rose Box 1 shell, former cigarette stopple coupon 20,21,22 and former smoke-box outlet at bottom 18 need well be incubated, and guarantee that flue-gas temperature is not less than 150 DEG C, in case flue gas low-temperature condensation.If desired, auxiliary heating device is installed additional at Rose Box 1 shell.
Be illustrated in figure 2 blowback source of the gas electric heater structure schematic diagram.Blowback source of the gas (i.e. pressurized air) first enters heating cabinet 2-2 by blowback source of the gas draft tube 2-1, heating 2-3, temperature element 2-4 is provided with in heating cabinet, electric heating control case 5 controls exerting oneself of electrical heating elements 2-3 according to the measured value of temperature element, purge gas is heated, as: design temperature is 150 DEG C, and the gas after heating accesses the clean smoke-box 7 of Fig. 1 by blowback source of the gas escape pipe 2-6.It should be noted that, heating cabinet 2-2, blowback source of the gas escape pipe 2-6 should carry out insulation and as far as possible near the clean smoke-box 7 shown in Fig. 1, possess higher temperature to keep blowback source of the gas.
In sum, the sampling flue-gas dust removal and purification device that the utility model provides has that high temperature resistant flue gas, good dedusting effect, blowback time short, filtrator does not need that manual maintenance, reliability are high, sampling flue gas is representative strong and measure the advantages such as the response time is short.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (10)
1. a denitration smoke on-line monitoring system sampling dedusting and purifying device, it is characterized in that, comprise the Rose Box that isolated device is isolated into former smoke-box and clean smoke-box, Rose Box is connected with blowback air source control system; Blowback air source control system comprises differential pressure measuring instrument and pulse control instrument, the malleation side stopple coupon of described differential pressure measuring instrument connects the former smoke-box of described Rose Box, suction side stopple coupon connects the clean smoke-box of described Rose Box, described differential pressure measuring instrument generates blowback command signal according to differential pressure rising condition and delivers to pulse control instrument, and pulse control instrument is opened blowback source of the gas and carried out blowback to rigid surface filter.
2. a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device as claimed in claim 1, it is characterized in that, described clean smoke-box is connected with denitration smoke on-line monitoring system sampling probe, former flue gas enters clean smoke-box after rigid surface filter dedusting, enters denitration smoke on-line monitoring system sampling probe through clean smoke-box;
The malleation side stopple coupon of described differential pressure measuring instrument connects the former smoke-box of described Rose Box through anti-blocking sampler.
3. a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device as claimed in claim 1, it is characterized in that, described blowback air source control system also comprises electromagnetic impulse valve, injection tube and Venturi tube, pulse control instrument converts blowback command signal to electromagnetic pulse signal and delivers to electromagnetic impulse valve and makes it to open, and blowback source of the gas carries out blowback through injection tube and Venturi tube to described rigid surface filter.
4. a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device as claimed in claim 1, it is characterized in that, described spacer assembly comprises card, diaphragm seal, rigid surface filter and pressing plate, described card is connected with Rose Box inwall, diaphragm seal is provided with between the top that rigid surface filter is thicker and card, described pressing plate to be fixed on card and to push down the thicker top of described rigid surface filter, makes top that rigid surface filter is thicker, diaphragm seal and card compact siro spinning technology under pressure;
Described rigid surface filter outside surface and Rose Box are encircled into former smoke-box, and inside surface and Rose Box, card are encircled into clean smoke-box.
5. a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device as claimed in claim 4, it is characterized in that, the Long-term service temperature that described rigid surface filter tolerates is higher than the maximum temperature of former flue gas normal operation period.
6. a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device as claimed in claim 1, it is characterized in that, described blowback source of the gas first heats through electric heater before entering clean smoke-box, and the gas temperature after heating is not less than 150 DEG C.
7. a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device as claimed in claim 4, it is characterized in that, described rigid surface filter is vertically placed.
8. a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device as claimed in claim 1, it is characterized in that, described pulse control instrument also receives the timing blowback instruction of denitration smoke on-line monitoring system.
9. a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device as claimed in claim 1, it is characterized in that, enter the flue gas of the former smoke-box of described Rose Box, take from multiple sampling spots of denitrating system flue, sampling spot is connected with former gas sampling probe, the former flue gas that multiple sampling spot obtains converges rear portion flue gas and enters the former smoke-box of described Rose Box, part of smoke is exported by former smoke-box and enters boiler air preheater exhaust pass or induced draft fan gas approach, so that former flue gas continues flowing under suction function;
Described Rose Box shell place installs auxiliary heating device additional.
10. a kind of denitration smoke on-line monitoring system sampling dedusting and purifying device as claimed in claim 6, it is characterized in that, the electric heater of described blowback source of the gas comprises: heating cabinet, the side of heating cabinet is connected with blowback source of the gas draft tube, the opposite side of heating cabinet is connected with blowback source of the gas escape pipe, be provided with temperature element and electrical heating elements in heating cabinet, temperature element and electrical heating elements are connected with electric heating control case respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520481417.4U CN204758348U (en) | 2015-07-06 | 2015-07-06 | Denitration flue gas on -line monitoring system sample dust removal purification device |
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| CN201520481417.4U CN204758348U (en) | 2015-07-06 | 2015-07-06 | Denitration flue gas on -line monitoring system sample dust removal purification device |
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| CN204758348U true CN204758348U (en) | 2015-11-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021428A (en) * | 2015-07-06 | 2015-11-04 | 山东国电技术咨询有限公司 | Sampling purification dedusting device for denitration flue gas on-line monitoring system |
-
2015
- 2015-07-06 CN CN201520481417.4U patent/CN204758348U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105021428A (en) * | 2015-07-06 | 2015-11-04 | 山东国电技术咨询有限公司 | Sampling purification dedusting device for denitration flue gas on-line monitoring system |
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Effective date of registration: 20190524 Address after: 250101 Shandong Province Jinan High-tech Zone Shunhua Road 2000 Shuntai Square 9 North District 10 floors Patentee after: SHANDONG GUODIAN POWERPLANT ENGINEERING CO., LTD. Address before: Room 1002, Building 9, Shuntai Square, 2000 Shunhua Road, Jinan High-tech Zone, Shandong Province, 250101 Patentee before: Power technology Advisory Co., Ltd of Shandong state |