CN205145809U - Processing apparatus before flue gas in DMTO device - Google Patents
Processing apparatus before flue gas in DMTO device Download PDFInfo
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- CN205145809U CN205145809U CN201520788185.7U CN201520788185U CN205145809U CN 205145809 U CN205145809 U CN 205145809U CN 201520788185 U CN201520788185 U CN 201520788185U CN 205145809 U CN205145809 U CN 205145809U
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- flue gas
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Abstract
The utility model discloses a be used for a processing apparatus before flue gas in DMTO device of petrochemical trade, mainly include filter screen part, heat exchange part, electron temperature controller, its characterized in that: the filter screen part has the second grade to filter, and the first order is the coarse filtration net, and the second level is thin filter screen, filter screen part top is the heat exchange part for high temperature flue gas and instrument wind carry out the heat exchange, heat exchange part end -to -end connection has the electron temperature controller for super temperature shut -off valve cuts off. Compared with the prior art, the utility model, collecting sample gas filtration, self -cleaning, cooling, dewatering, sample gas exit temperature automatic control in an organic whole, having simple structure, the low temperature effect is powerful, and the sample gas is pollution -free, and field maintemance work load is little, and advantages such as low cost have higher maneuverability and price / performance ratio.
Description
Technical field
The utility model belongs to petroleum chemical industry, is specifically related to a kind of device for carrying out pre-treatment in DMTO device in petroleum chemical industry to flue gas.
Background technology
In petrochemical industry and Coal Chemical Industry fluidization process device reaction regenerative system, in order to grasp burning and reproduced state of catalyst, need the O in regenerated flue gas
2, CO and CO
2constituent content carries out on-line checkingi and analysis.Owing to usually containing a large amount of catalyst dust and solid particle in regenerated flue gas, flue gas cool-down rear catalyst dust is easily combined with condensed water and blocks sample air pipe, cause sample gas to carry and difficult treatment, therefore, need during sampling to carry out pre-treatment to the catalyst dust in flue gas and solid particle.
Traditional catalyst dust and solid particle pre-treating method mainly contain following several:
1) filter method
Principle: directly install the filter with screen pack (2 μm ~ 5 μm) after sample point root valve, by the catalyst dust in filter screen filtering flue gas and solid particle.
Advantage: structure is simple, and flue gas sampling is pollution-free, cheap.
Shortcoming: catalyst dust and the easy blocking filter of solid particle, need periodic cleaning screen pack, field maintenance workload is large, cannot long-term operation.
2) immersion method
Principle: passed in water sealed tank by flue gas and wash, washes the catalyst dust in flue gas and solid particle off, reduces the temperature of sampling flue gas.
Advantage: the most of catalyst dust in flue gas and solid particle can be washed, flue gas cool-down successful.
Shortcoming: flue gas holdup time in water bath containers is longer, and sampling lag is serious; Water bath containers volume is comparatively large, needs larger installing space; Flue-gas temperature is higher, washings evaporation and overflow loss serious; Flue gas after process carries a large amount of water vapour, and needing during post processing increases drying facility again, and overall operation cost improves, and field maintenance workload is larger.
3) MOTT tube method
Principle: MOTT pipe is a kind of double layered tubular configured filter of ceramic post sintering, flue gas pipe in MOTT pipe flows and forms fast loop, flue gas after filtration under the effect of pressure differential through ceramic filter to after-treatment device, catalyst dust in flue gas and solid particle are filtered at MOTT inside pipe wall, and the catalyst steam on inner tubal wall regularly purges cleaning.
Advantage: can reach online automatically cleaning effect to a certain extent, sampling lag is less.
Shortcoming: MOTT manages as imported product, and cost is higher, installs to take up room comparatively large, and catalyst dust easily blocks ceramic filter, dismounting and change and field maintenance workload larger.
4) laser method
Principle: install a pair laser probe in flue bilateral symmetry, an Emission Lasers, one accepts laser.When laser beam is through sample gas, because component various in sample gas is different to the various wavelength light degrees of absorption in laser beam, the spectrogram of generation is not identical yet, by analyzing spectrogram, can know the gas component content in flue gas.
Advantage: solve filter clogging problems, analytical sampling speed.
Shortcoming: certainty of measurement is not high; A large amount of nitrogen blowback is needed to cool optical lens; Must to extra compensating property of nitrogen conversion of injecting in laser spectrum, bring certain error; The stability of laser head is influenced by environmental temperature; When catalyst concn is larger, the laser beam of transmitting can not arrive receiving terminal completely.
Utility model content
The purpose of this utility model is to provide the device in a kind of DMTO device, flue gas being carried out to pre-treatment, to solve the larger technical problem of dismounting and change and field maintenance workload in prior art, and the good separating effect of dust and solid particle in sample gas, can also reduce the investment of instrument entirety.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is:
A kind of DMTO device flue gas pretreating device, mainly comprises screen pack part, heat exchange section, electronic temperature controller; It is characterized in that: described screen pack part has cascade filtration, the first order is coarse filtration net, and the second level is thin screen pack; Screen pack upper is heat exchange section, carries out heat exchange for high-temperature flue gas and instrument wind; Heat exchange section end is connected with electronic temperature controller, for cutting off overtemperature shut-off valve.
A kind of DMTO device of the utility model flue gas pretreating device, it is further characterized in that: described DMTO device flue gas pretreating device is vertically arranged on process high-temperature flue.
A kind of DMTO device of the utility model flue gas pretreating device, it is further characterized in that: described screen pack part has cascade filtration, the first order is coarse filtration net, and for filtering large granular catalyst in DMTO process high-temperature flue gas, the order number of described coarse filtration net is 10 ~ 20 μm; The second level is thin screen pack, and for the catalyst fines in filtering high temperature flue gas, the order number of described thin screen pack is: 3 ~ 5 μm, and high-temperature flue gas continues upwards to arrive at heat exchange section after screen pack part cascade filtration.
A kind of DMTO device of the utility model flue gas pretreating device, it is further characterized in that: described heat exchange section and screen pack part are Flange joint.
A kind of DMTO device of the utility model flue gas pretreating device, it is further characterized in that: be provided with instrument wind entrance in the upper end of described heat exchange section, is provided with instrument wind outlet in the lower end of heat exchange section.
A kind of DMTO device of the utility model flue gas pretreating device, it is further characterized in that: described heat exchange department separation structure is heat exchange tubulation, is divided into tube side and shell side, and high-temperature flue gas walks the larger shell side in space, high pressure and the instrument wind of cleaning walks tube side.Pressure-air is the volume sharply expansion work heat absorption because pressure reduces in tube side, temperature is caused sharply to decline, the high-temperature flue gas in shell side is made to be reduced to dew point through heat exchange, high-temperature flue gas condenses in shell side, condensate water under gravity, is back to screen pack part downwards, back flush screen pack, reaching the object from rinsing, reducing and regularly removing clean and maintenance amount.
A kind of DMTO device of the utility model flue gas pretreating device; it is further characterized in that: when after heat exchange section, the cooling effect of high-temperature flue gas can not reach requirement; the electronic temperature controller of heat exchange section end detects flue-gas temperature and can not be down to below dew point; interlocking is cut off overtemperature shut-off valve; this instrument quits work, to protect downstream fume gas analysis meter and pre-processing device thereof.
The utility model is a kind of DMTO device flue gas pretreating device, pre-treatment is carried out to flue gas sample gas, high-temperature flue gas is made to remove solid dust, avoid blocking sampling conduit, by cooling high-temperature fume to analysis meter pretreatment unit acceptable scope, the water content simultaneously in control flue gas is at zone of reasonableness.
The utility model compared with prior art, filtrations of collection sample gas, self-cleaning, cool, dewater, sample gas outlet temperature is controlled in integrally automatically, have structure simple, cryogenic effect is powerful, and sample gas is pollution-free, field maintenance workload is little, the advantage such as with low cost, has higher operability and cost performance, is specially adapted to DMTO device flue gas after three grades of rotary-splitting filterings, in sample gas, catalyst content is less, and the occasion not containing corrosive gas in sample gas.In DMTO device, there is wide market prospects and application value.
Below in conjunction with accompanying drawing, the utility model is described in more detail.But the drawings and specific embodiments do not limit scope of the present utility model.
Accompanying drawing explanation
Fig. 1 is a kind of DMTO device flue gas pretreating device structural representation of the present utility model.
Reference numeral shown in figure is: 1-process high-temperature flue, 2-technique stop valve, 3-screen pack part, 4-coarse filtration net, the thin screen pack of 5-, 6-heat exchange section, 7-sample air-flow is distinguished and admirable to, 9-instrument wind entrance to, 8-instrument, 10-instrument wind outlet, 11-steam valve, 12-electronic temperature controller, 13-overtemperature shut-off valve, 14-heat exchange tubulation, 15-sample gas removes pretreated passage.
Detailed description of the invention
The utility model provides a kind of DMTO device flue gas pretreating device, is described in detail the utility model below in conjunction with accompanying drawing.
The high-temperature flue gas of this device process is through the processed flue gas of technique three grades of rotary-splitting filtering devices, its process conditions:
Medium: regenerated flue gas temperature: 645-720 DEG C pressure: 0.11MPa (G)
Nominal situation catalyst granules concentration: 0 ~ 150mg/Nm
3(maximum duty 600mg/Nm
3).
Nominal situation regenerator three screw outlet size consist: the catalyst that diameter is less than or equal to 5 μm accounts for 98.6%, is greater than 5 μm and accounts for 1.4%.
The utility model is a kind of DMTO device flue gas pretreating device, this device needs vertical installation on flue, high-temperature flue gas flows through process high-temperature flue 1, under pressure itself effect, upwards flow through technique stop valve 2, arrive the screen pack part 3 of this device, complete the first order through coarse filtration net 4 to filter, coarse filtration net 4 order number is larger in order to filter catalyst solid particle larger in flue gas, then flue gas completes second level filtration through meticulous screen pack 5, thin screen pack 5 order number is less of the catalyst particle fine powder filtered out in flue gas, after cascade filtration, solid particle in flue gas is substantially processed clean, remain micro-particle to be processed at downstream pretreatment unit, screen pack is stainless steel, not sulfur-bearing composition in flue gas, corrosivity is not strong, screen pack adopts stainless steel basic guarantee need not change by Long-Time Service, flue gas continues upwards to arrive at heat exchange section 6 after filtering, heat exchange section 6 and screen pack part 3 are Flange joint, its structure is divided into tube side and shell side two parts, tube side is heat exchange tubulation 14, operation principle and classical heat exchanger-type are seemingly, sample air-flow to 7 for flow through in shell side from bottom to top, refrigerant is instrument wind, instrument is distinguished and admirable is from top to bottom to 8, flow through in the heat exchange tubulation of instrument wind in tube side, 5 kilograms of high tension instrument wind enter heat exchange tubulation from heat exchange tubulation top instrument wind entrance 9, air is entered from bottom instrument wind outlet 10, subtract because pressure is anxious, gas sharply expansion work heat absorption, the temperature of heat exchanging pipe is caused sharply to decline, by heat exchange, the high-temperature flue gas in shell side is cooled to dew point about 3 DEG C, moisture in flue gas condenses in shell side, because this device is vertically install, water droplet returns screen pack part 3 under gravity, back flush is blocked in the catalyst of screen pack lower end, in the process high-temperature flue 1 of being sent back to, under pipeline high temperature action, aqueous water sharply gasifies repeatedly, again rise with flue gas, then the washed filter screen of condensation repeatedly, greatly reduce the workload of removing screen pack hand washing, when the device initial stage water yield that comes into operation can not be backflowed not in a large number, when affecting clean result, the steam-out (SO) valve 11 that can suitably open, suitably supplement steam, indirect increase washings consumption, due to daytime, night or summer, winter and because when regional difference causes environment temperature difference, heat transfer effect may have difference, whether electronic temperature controller 12 reaches dew point for the temperature of flue gas after monitoring heat exchange, by suitably adjusting the consumption of high tension instrument wind, ensure cooling-down effect, when flue gas cool-down cannot be ensured to dew point, downstream sample gas will cause pretreatment drying equipment to be difficult to normal work because of containing a large amount of steam, if the malfunctioning high-temperature flue gas of this equipment heat transfer effect directly passes into downstream, downstream pre-processing device and analysis meter cannot tolerate so high temperature, for pre-processing device and the analysis meter of protection downstream analysis instrument, electronic temperature controller will cut off overtemperature shut-off valve 13, close sample gas and remove pretreated passage 15, this device is stopped using, need manual intervention process.
Claims (5)
1. a flue gas pretreating device in DMTO device, mainly comprises screen pack part, heat exchange section, electronic temperature controller; It is characterized in that: described screen pack part has cascade filtration, the first order is coarse filtration net, and the second level is thin screen pack; Screen pack upper is heat exchange section, and described heat exchange section and screen pack part are Flange joint, carries out heat exchange for high-temperature flue gas and instrument wind; Heat exchange section end is connected with electronic temperature controller, for cutting off overtemperature shut-off valve.
2. flue gas pretreating device in a kind of DMTO device according to claim 1, is characterized in that: described DMTO device flue gas pretreating device is vertically arranged on process high-temperature flue.
3. flue gas pretreating device in a kind of DMTO device according to claim 1, it is characterized in that: described screen pack part has cascade filtration, the first order is coarse filtration net, and the order number of described coarse filtration net is 10 ~ 20 μm.
4. flue gas pretreating device in a kind of DMTO device according to claim 1, is characterized in that: the second level is thin screen pack, and the order number of described thin screen pack is 3 ~ 5 μm.
5. flue gas pretreating device in a kind of DMTO device according to claim 1, is characterized in that: be provided with instrument wind entrance in the upper end of described heat exchange section, is provided with instrument wind outlet in the lower end of heat exchange section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520788185.7U CN205145809U (en) | 2015-10-12 | 2015-10-12 | Processing apparatus before flue gas in DMTO device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520788185.7U CN205145809U (en) | 2015-10-12 | 2015-10-12 | Processing apparatus before flue gas in DMTO device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205145809U true CN205145809U (en) | 2016-04-13 |
Family
ID=55681553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520788185.7U Active CN205145809U (en) | 2015-10-12 | 2015-10-12 | Processing apparatus before flue gas in DMTO device |
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| Country | Link |
|---|---|
| CN (1) | CN205145809U (en) |
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2015
- 2015-10-12 CN CN201520788185.7U patent/CN205145809U/en active Active
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