CN203451317U - Catalytic cracking flue gas desulfurization wastewater treatment device - Google Patents
Catalytic cracking flue gas desulfurization wastewater treatment device Download PDFInfo
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- CN203451317U CN203451317U CN201320573143.2U CN201320573143U CN203451317U CN 203451317 U CN203451317 U CN 203451317U CN 201320573143 U CN201320573143 U CN 201320573143U CN 203451317 U CN203451317 U CN 203451317U
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Abstract
The utility model provides a catalytic cracking flue gas desulfurization wastewater treatment device which mainly comprises a cyclone hydraulic separator, an alkali tank, a neutralization reactor, a slurry pool, an expansion drum type filter, an oxidation tank, a sedimentation tank and a volute dehydrator, wherein the cyclone hydraulic separator is provided with an acidic liquid waste inlet and a weak liquor outlet, the bottom of the cyclone hydraulic separator is connected with the feed opening of the neutralization reactor, and the bottom of the alkali tank is connected with the feed opening of the neutralization reactor at the same time; the discharge opening of the neutralization reactor is connected with the slurry pool, the slurry pool is connected with the feed opening of the expansion drum type filter, the supernatant outlet of the expansion drum type filter is connected with the feed opening of the oxidation tank, and a discharge opening is formed in the upper part of the oxidation tank; the discharge opening of the expansion drum type filter is connected with the feed opening of the sedimentation tank, and the discharge opening of the sedimentation tank is connected with the feed opening of the volute dehydrator. Wastewater treated by the device can be directly discharged, and a catalyst filter cake can be directly transported; compared with existing equipment, the catalytic cracking flue gas desulfurization wastewater treatment device is small in occupation area, low in operation cost and wide in application range.
Description
Technical field
The utility model relates to a kind of waste liquor treatment equipment, especially catalytic cracking flue gas desulfurization waste liquor treatment unit.
Background technology
Catalytic cracking flue gas generally adopts wet desulfurizing process at present, and wet fuel gas desulfurizing technology comprises disposable absorption technique and renewable absorption technique two classes.Renewable absorption technique is owing to changing the pollutent in flue gas into SO that purity is very high
2reclaimed, and substantially do not produce secondary pollution and receive attention, it comprises the washing of flue gas chilling, SO
2the operating units such as absorption and regeneration.The washing of flue gas chilling adopts fresh water to carry out dedusting cooling; system is in normal course of operation; need to control to protect equipment and the pipelines such as pump, nozzle to the suspended substance in circulation sour water, chlorion, soluble solid content; when These parameters exceeds standard, the recycle system needs outer row's part sour water to enter follow-up liquid waste treatment system.The principal pollutant that contain in sour water have catalyst dust, sulfurous acid, sulfuric acid, sodium salt and heavy metal etc., if these pollutents are processed direct discharge not in time, will certainly cause serious pollution to environment.Generally adopt at present first sour water to be added to alkali and be neutralized to neutrality, then after filtration or subsider, improve after the solid content of waste liquid, then carry out solid-liquid separation with filtrate box, the discharge after oxidation tank oxidation of the supernatant liquor of subsider.As CN101003412A has introduced a kind of flue gas desulfurization waste-water treatment unit, it is characterized in that being composed in series through pipeline by waste water Buffer Pool, neutralization/reaction/flocculation tanks, clarification/concentration basin, water tank; In waste water Buffer Pool, be provided with aerator, liquidometer, waste water lifting system; In neutralization/reaction/flocculation tanks, be provided with whipping device; At clarification/concentration basin, be provided with the mud equipment of scraping, sludge interface instrument; In water tank, be provided with pH meter, whipping device and liquidometer.Said apparatus exists: the waste liquid residence time is long, and occupation area of equipment is large, and going out water suspension can not be up to standard, and water outlet COD is too high, and device impact resistance is little; In addition, equipment checking maintenance difficulty, auxiliary facility investment is high, and schedule of operation is loaded down with trivial details, work under bad environment, most for the treatment of unit be that intermittence is affected, the shortcoming such as can not move continuously.
Utility model content
Long in order to overcome the waste liquid residence time that prior art exists, occupation area of equipment is large, and going out water suspension can not be up to standard, and water outlet COD is too high, the little technical problem of device impact resistance, the utility model provides a kind of catalytic cracking flue gas desulfurization waste liquor treatment unit.
The catalytic cracking flue gas desulfurization waste liquor treatment unit that the utility model provides is mainly comprised of wet cyclone, alkali tank, neutralization reactor, slurry pool, swollen drum strainer, oxidation tank, settling tank and folded spiral shell formula water extracter; Wet cyclone middle part is provided with acid waste liquid import, and its top is provided with thin liquid outlet, and its bottom is connected with the opening for feed of neutralization reactor, and the bottom of alkali tank is also connected with the opening for feed of neutralization reactor simultaneously; The discharge port of neutralization reactor is connected with slurry pool, and slurry pool is connected with the opening for feed of swollen drum strainer middle and lower part, and the supernatant liquor outlet of cripling formula filter top is connected with the opening for feed of oxidation tank bottom, and oxidation tank top is provided with discharge port; The discharge port of cripling formula filter bottom is connected with the top fed mouth of settling tank, and the discharge port of settling tank bottom is connected with the opening for feed of folded spiral shell formula water extracter.
Described wet cyclone, for the catalyst dust of acid waste liquid is concentrated, reduces the particle concentration in acid waste liquid, reduces the wearing and tearing of acid waste liquid to equipment, pipeline and pump.
Described neutralization reactor, for the dope from wet cyclone is neutralized, makes liquid be neutral.
Described swollen drum strainer, for waste liquid is carried out to fast filtering, is realized solid-liquid separation, makes the total suspended matter of efflux wastewater meet petrochemical industry emission standard.
Described oxidation tank, for the oxidation to efflux wastewater, reduces the false COD in waste water, makes the COD of efflux wastewater up to standard.
Described settling tank is for further precipitating the underflow of cripling formula Filter Back Washing.
Described folded spiral shell formula sludge dewatering equipment carries out further dehydration for the mud that settling tank is discharged and becomes filter cake, is convenient to solid slag and directly transports.
The utlity model has following advantages:
1, in catalytic cracking flue gas, catalyst powder particle concentration is high, after washing by chilling, enter in recycle acid water, adopt after wet cyclone, catalyst dust can be concentrated, do not changing on the basis of waste liquor treatment equipment size, greatly reduce the dust concentration in circulation sour water, reduce the wearing and tearing of circulation sour water to equipment, pipeline and pump, be conducive to the long-term operation of device.
2, adopt swollen drum strainer to carry out solid-liquid separation, filtering rate is fast, filtrate water conditioning, and total suspended matter meets emission standard.
3, utilize serial or parallel connection oxidation tank to be fully oxidized supernatant liquor, making sulfite oxidation is vitriol, removes the COD of sewage.
4, the mud in settling tank enters folded spiral shell formula water extracter and further dewaters, and export outer blowdown mud solid content approximately 40%, can directly transport, and equipment occupation of land is little, safeguards simple, easy to operate.
5, complete assembly floor space is little, solid-liquid separation is thorough, and clear liquid can directly discharge; Mud cake can directly transport, good operational environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of catalytic cracking flue gas desulfurization waste liquor treatment unit of the present utility model.
In figure:
1-chilling washing tower, 2-recycle pump, 3-wet cyclone, 4-neutralization reactor, 5-alkali tank, the online pH analyser of 6-, 7-slurry pool, 8-flocculation agent feeder, 9-slurry pool stirrer, 10-submerged pump, 11-is swollen drum strainer, 12-transferpump, 13-oxidation tank, 14-air-distributor, 15-oxidation tank agitator, the online pH analyser of 16-, 17-effluent trough, 18-settling tank, 19-bleed valve, 20-folds spiral shell formula water extracter, 21-alkali tank pump, 22-underflow valve.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, as shown in Figure 1, the catalytic cracking flue gas desulfurization waste liquor treatment unit that the utility model provides is mainly by chilling washing tower 1, recycle pump 2, wet cyclone 3, neutralization reactor 4, alkali tank 5, online pH analyser 6, slurry pool 7, flocculation agent feeder 8, slurry pool stirrer 9, submerged pump 10, swollen drum strainer 11, transferpump 12, oxidation tank 13, air-distributor 14, oxidation tank agitator 15, online pH analyser 16, effluent trough 17, settling tank 18, bleed valve 19, folded spiral shell formula water extracter 20 and underflow valve 22 form.
The middle and lower part of chilling washing tower 1 is provided with FCC smoke inlet, the acid waste liquid outlet of chilling washing tower 1 bottom is connected with recycle pump 2, the outlet of recycle pump 2 is divided into two bye-passes, one bye-pass returns to the top of chilling washing tower 1, form circulation loop, another bye-pass is connected with the acid waste liquid import of being located at wet cyclone 3 middle parts, wet cyclone 3 tops are provided with thin liquid outlet, thin liquid outlet is connected with chilling washing tower 1 bottom by pipeline, the bottom of wet cyclone 3 is connected with the opening for feed of neutralization reactor 4 by being provided with the pipeline of underflow valve 22, the bottom of alkali tank 5 is also connected with the opening for feed of neutralization reactor 4 by being provided with the pipeline of alkali tank pump 21 simultaneously, the outlet of neutralization reactor 4 is connected with slurry pool 7 by pipeline, the export pipeline of neutralization reactor 4 is provided with online pH analyser 6, the outer flocculation agent feeder 8 that is provided with of slurry pool 7, in slurry pool 7, be provided with slurry pool stirrer 9 and submerged pump 10, the export pipeline of submerged pump 10 is connected with the opening for feed of swollen drum strainer 11 middle and lower parts, the supernatant liquor outlet at swollen drum strainer 11 tops is connected with two bye-passes, one is connected with the middle and lower part of chilling washing tower 1, another is connected with the opening for feed of oxidation tank 13 bottoms by transferpump 12, the discharge port that oxidation tank 13 tops arrange is connected with effluent trough 17 by pipeline, the interior position near middle and lower part of oxidation tank 13 is provided with air-distributor 14 and oxidation tank agitator 15, the pipeline of the discharge port of oxidation tank 13 is provided with online pH analyser 16, the discharge port of swollen drum strainer 11 bottoms is connected with the opening for feed that is positioned at settling tank 18 tops of its below by pipeline, and the discharge port of settling tank 18 bottoms is connected with the opening for feed of folded spiral shell formula water extracter 20 by being provided with the pipeline of bleed valve 19.
While utilizing device of the present utility model to carry out liquid waste disposal, FCC flue gas enters chilling washing tower 1, and to carry out chilling saturated from the middle and lower part of chilling washing tower 1, formation contains particulate matter, the acid waste liquid of vitriol and sulphite, waste liquid is discharged at the bottom of tower, major part is returned to chilling washing tower 1 through recycle pump 2 circulations, remainder is sent into wet cyclone 3 and is carried out concentration-type solid-liquid separation, catalyst dust is separated from waste liquid, the thin liquid producing through separation returns to 1 circulation of chilling washing tower through wet cyclone 3 tops, what through separation, produce enters neutralization reactor 4 containing the more dope of particulate matter through wet cyclone 3 bottoms.
Containing the more dope of particulate matter, in neutralization reactor 4, mix with the alkali lye of coming through alkali tank pump 21 from alkali tank 5, there is neutralization reaction, generation is neutral waste liquid, the alkali lye amount adding is controlled by online pH analyser 6, waste liquid after neutralization enters slurry pool 7, flocculation agent feeder 8 injects flocculation agent to slurry pool 7, through slurry pool stirrer 9, stir waste liquid is mixed with flocculation agent, mixed waste liquid is transported to swollen drum strainer 11 through submerged pump 10, and (swollen drum strainer is two, one open one standby, reach capacity need to carry out back flushing time when one, be switched to another, swollen drum strainer after back flushing is standby), after entering the mixing of swollen drum strainer 11, waste liquid is in the interior generation flocculation of swollen drum strainer 11, and small particulate matter is flocculated into large flocs unit, then by the membrane filtration of swollen drum strainer 11, realizes solid-liquid separation and obtain underflow and supernatant liquor.
Supernatant liquor is discharged from swollen drum strainer 11 tops, part is returned to the 1 bottom reuse of chilling washing tower to reduce efflux wastewater amount, remaining supernatant liquor is transported in oxidation tank 13 by transferpump 12, establishes air-distributor 14, oxidation tank agitator 15 and on-line pH value analyser 16 in oxidation tank 13; Supernatant liquor enters in oxidation tank 13 and the non-purified compressed air injecting from oxidation tank 13 bottoms and a small amount of alkali lye, fully contact under the effect of oxidation tank agitator 15, a large amount of aerations will contain the false COD oxidation removal of inferior sulfate radical, bisulfite in supernatant liquor, effectively reduce the COD of discharge opeing, the injection rate of alkali lye is controlled by on-line pH value analyser 16, to guarantee that water outlet is neutral, supernatant liquor waste liquid total suspended matter (TSS) after treatment meets emission standard, through effluent trough 17, can directly discharge.How much quantity of oxidation tank 13 can arrange according to the concentration of sulphite in waste liquid, can be one, two or more (in Fig. 1, oxidation tank is 1).When oxidation tank 13 is two or more, as 2～5, its mode of connection can be also parallel connection for series connection.
Underflow enters settling tank 18 from swollen drum strainer 11 bottoms and again precipitates, when block that settling tank 18 bottoms are flocculated precipitation gathers and reach a certain height at the bottom of pond (height that can monitor that block precipitation is assembled by mud liquidometer is set in settling tank), bleed valve 19 by bottom is periodically discharged to folded spiral shell formula water extracter 20, at folded spiral shell formula water extracter 20 interior filter cakes, be further dehydrated mummification to solid content and reach 35～40%, can directly transport, landfill, the filtrate removing is returned after slurry pool 7 mixes with waste liquid and is re-started filtration.Certainly water extracter also can adopt the water extracter of other patterns.
Described wet cyclone 3 can be according to dust concentration manual regulation underflow valve 22 apertures in flue gas with the dust content in controlled circulation sour water; Folded spiral shell formula water extracter 20 has replaced traditional filter cloth and centrifugal filter type, and occupation area of equipment is little, simple to operate, can be according to sludge quantity flexible to be processed.
The COD<60mg/L of efflux wastewater after the device shown in Fig. 1 is processed, total suspended matter concentration <50mg/L, reaches petrochemical industry sewage drainage standard, can directly discharge; Outer blowdown mud solid content approximately 40%, further standing dehydration just can directly be transported again.
The experiment proved that, catalytic cracking flue gas desulfurization waste liquor treatment unit treatment effect stability and high efficiency of the present utility model, strong shock resistance, investment and floor space are little, easy and simple to handle.
Claims (6)
1. a catalytic cracking flue gas desulfurization waste liquor treatment unit, is characterized in that: mainly wet cyclone, alkali tank, neutralization reactor, slurry pool, swollen drum strainer, oxidation tank, settling tank and folded spiral shell formula water extracter, consist of; Wet cyclone middle part is provided with acid waste liquid import, and its top is provided with thin liquid outlet, and its bottom is connected with the opening for feed of neutralization reactor, and the bottom of alkali tank is also connected with the opening for feed of neutralization reactor simultaneously; The discharge port of neutralization reactor is connected with slurry pool, and slurry pool is connected with the opening for feed of swollen drum strainer middle and lower part, and the supernatant liquor outlet of cripling formula filter top is connected with the opening for feed of oxidation tank bottom, and oxidation tank top is provided with discharge port; The discharge port of cripling formula filter bottom is connected with the top fed mouth of settling tank, and the discharge port of settling tank bottom is connected with the opening for feed of folded spiral shell formula water extracter.
2. device according to claim 1, it is characterized in that: the charging of described wet cyclone is from chilling washing tower, the middle and lower part of chilling washing tower is provided with FCC smoke inlet, the acid waste liquid outlet of chilling wash tower bottoms is connected with recycle pump, circulation pump outlet is divided into two bye-passes, one bye-pass returns to the top of chilling washing tower, form circulation loop, another bye-pass is connected with the acid waste liquid import of being located at wet cyclone middle part, wet cyclone top is provided with thin liquid outlet, thin liquid outlet is connected with chilling washing tower bottom by pipeline, the bottom of wet cyclone is by being provided with the pipeline of underflow valve and the opening for feed of neutralization reactor is connected, the bottom of alkali tank is also connected with the opening for feed of neutralization reactor by being provided with the pipeline of alkali tank pump simultaneously, the outlet of neutralization reactor is connected with slurry pool by pipeline, slurry pool is provided with flocculation agent feeder outward, in slurry pool, be provided with slurry pool stirrer and submerged pump, the export pipeline of submerged pump is connected with the opening for feed of swollen drum strainer middle and lower part, the supernatant liquor outlet of cripling formula filter top is connected with two bye-passes, one is connected with the middle and lower part of chilling washing tower, another is connected with the opening for feed of oxidation tank bottom by transferpump, the discharge port that oxidation tank top arranges is connected with effluent trough by pipeline, position near middle and lower part in oxidation tank is provided with air-distributor and oxidation tank agitator, the discharge port of cripling formula filter bottom is connected with the opening for feed that is positioned at the settling tank top of its below by pipeline, and the discharge port of settling tank bottom is connected with the opening for feed of folded spiral shell formula water extracter by being provided with the pipeline of bleed valve.
3. device according to claim 1 and 2, is characterized in that: described swollen drum strainer is out that one for two.
4. device according to claim 1 and 2, is characterized in that: described oxidation tank is two or more, and mode of connection is serial or parallel connection.
5. device according to claim 1 and 2, is characterized in that: in described settling tank, be provided with for monitoring the mud liquidometer of block precipitation gathering height.
6. device according to claim 1 and 2, is characterized in that: the pipeline of the discharge port of described oxidation tank is provided with online pH analyser, is also provided with online pH analyser on the export pipeline of neutralization reactor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320573143.2U CN203451317U (en) | 2013-09-09 | 2013-09-09 | Catalytic cracking flue gas desulfurization wastewater treatment device |
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|---|---|---|---|
| CN201320573143.2U CN203451317U (en) | 2013-09-09 | 2013-09-09 | Catalytic cracking flue gas desulfurization wastewater treatment device |
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| CN203451317U true CN203451317U (en) | 2014-02-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104043328A (en) * | 2014-06-19 | 2014-09-17 | 山东黑石环保科技有限公司 | Regenerated flue gas desulfurizing device and method by alkaline process catalytic cracking |
| CN106746148A (en) * | 2017-03-17 | 2017-05-31 | 成都源蓉科技有限公司 | A kind of magnetic loading precipitation filtration, purification system |
-
2013
- 2013-09-09 CN CN201320573143.2U patent/CN203451317U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104043328A (en) * | 2014-06-19 | 2014-09-17 | 山东黑石环保科技有限公司 | Regenerated flue gas desulfurizing device and method by alkaline process catalytic cracking |
| CN106746148A (en) * | 2017-03-17 | 2017-05-31 | 成都源蓉科技有限公司 | A kind of magnetic loading precipitation filtration, purification system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
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Granted publication date: 20140226 |