CN103130369A - Method of reusing sodium hypochlorite waste water generated by acetylene lustration - Google Patents
Method of reusing sodium hypochlorite waste water generated by acetylene lustration Download PDFInfo
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- CN103130369A CN103130369A CN2011104201523A CN201110420152A CN103130369A CN 103130369 A CN103130369 A CN 103130369A CN 2011104201523 A CN2011104201523 A CN 2011104201523A CN 201110420152 A CN201110420152 A CN 201110420152A CN 103130369 A CN103130369 A CN 103130369A
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Abstract
The invention relates to a method of reusing sodium hypochlorite waste water generated by acetylene lustration. Sodium hypochlorite waste water outflowing from a lustration tower is lifted to an acetylene gas processor, acetylene gas dissolved in the sodium hypochlorite waste water is removed, and the sodium hypochlorite waste water without the acetylene gas is sent into a sodium hypochlorite waste water reuse process, the sodium hypochlorite waste water reuse process comprises a dephosphorization device, a ceramic membrane filtration device, a reverse osmosis membrane device, a rinsing sink and a concentrated solution sink, and the dephosphorization device, the ceramic membrane filtration device, the reverse osmosis membrane device, the rinsing sink and the concentrated solution sink are connected in sequence. According to the method of reusing the sodium hypochlorite waste water generated by the acetylene lustration, impurities such as the acetylene gas, phosphide and chloride in the sodium hypochlorite waste water are processed by means of vacuum extraction, oxidation, membrane filtration, concentration and the like, zero release and recycle of the sodium hypochlorite waste water are achieved, the acetylene gas is recycled, primary water is saved, chloride is recycled at the same time, and the purposes of energy conservation and consumption reduction, emission reduction and environmental protection, and safety in production are achieved. The method of reusing the sodium hypochlorite waste water generated by the acetylene lustration can be widely applied to the production process of calcium carbide method of polrvinyl vhloride resin production, and particularly suitable for a calcium carbide method of acetylene production process.
Description
Affiliated technical field:
The present invention relates to a kind of method of Industrial Wastewater Treatment, particularly be applicable to a kind of method of the clorox waste water recycling of acetylene cleaning generation.
Background technology:
In calcium carbide route production polyvinyl chloride (PVC) RESINS process, adopt clorox that acetylene gas is carried out in acetylene cleaning process peace and quiet, the clorox waste water that produces in this process becomes the quantity of wastewater effluent of acetylene system maximum.And with containing of producing in the acetylene cleaning operation, clorox waste water reclaimed and rationally to utilize be emphasis with energy-saving and emission-reduction.The moiety of clorox waste water is more complicated, the indices such as TOC, COD, PH, muriate, specific conductivity and calcium, magnesium, phosphorus are all far away higher than discharge index, so must recycle timely, at present mostly in industry use two kinds of ways of recycling, the first is directly to enter producer and calcium carbide reacts; The second is that the clorox with useless sodium and high density is configured, and is configured to 0.08～0.12% fresh clorox and enters system and recycle.Though dual mode energy reuse clorox waste water, but all have separately still unsolved drawback: clorox waste water is delivered to producer directly to first kind of way and calcium carbide reacts, in this process, contain a large amount of muriates in dimension sodium chlorate waste water, can produce the muriate of solid after reaction, cause that in the carbide slag of generation, chlorine-containing components increases, can't carry out the reuse of carbide slag, particularly make in the process of cement at carbide slag, the muriatic quality that increases production system and cement products can cause very large impact; The second way is that the clorox waste water below 0.06% and the clorox of high density are configured with concentration, the fresh clorox that is configured to concentration 0.08～0.12% carries out reuse, in this process, the acetylene gas that dissolves in clorox waste water is on the one hand easily blasted with high-concentrated sodium hypochlorite reaction generation chloroacetylene, affects production safety; Another important aspect is exactly in the process of cyclically utilizing, and phosphide, muriate aggravation enrichment cause spontaneous combustion blast and saline crystallization to stop up series of problems such as producing pipeline.
Summary of the invention:
The object of the invention is to overcome deficiency of the prior art and the method for the clorox waste water recycling that a kind of acetylene cleaning produces is provided.
the technical solution used in the present invention is: a kind of method of the clorox waste water recycling that acetylene cleaning of the present invention produces is: enter peace and quiet tower from the chlorine bleach liquor in calcium carbide method acetylene production technique and carry out peace and quiet to thick acetylene gas, enter the next operation use of calcium carbide method acetylene production technique from the high purity acetylene gas of peace and quiet tower generation, the clorox waste water that produces is further processed, described method is for the technique of having carried out following recycling from peace and quiet tower clorox waste water out: an acetylene gas treatment unit is set after peace and quiet tower, to deviate from the acetylene gas that dissolves clorox waste water to the acetylene gas treatment unit from peace and quiet tower clorox waste water lifting out, the clorox waste water of deviating from after acetylene gas is sent into clorox waste water recycling operation.
A kind of method of the clorox waste water recycling that described acetylene cleaning produces, acetylene gas treatment unit comprise vacuum hydro-extraction tower, negative pressure device and go out water pump, and negative pressure device is connected with the top of vacuum hydro-extraction tower, goes out water pump and is connected with the bottom of vacuum hydro-extraction tower; Be provided with filler in the vacuum hydro-extraction tower, the filler bottom arranges liquid distributor; Will be from peace and quiet tower clorox waste water lifting out to the vacuum hydro-extraction tower, under the effect of negative pressure device, by dividing potential drop in the water in reduction vacuum hydro-extraction tower, the acetylene gas in clorox waste water is deviate from, the acetylene gas of deviating from is by vacuum hydro-extraction top of tower acetylene house steward gas holder before negative pressure device enters cooling tower, clorox waste water after degassed by the vacuum hydro-extraction tower bottom out is pumped into clorox waste water recycling operation by water outlet.
A kind of method of the clorox waste water recycling that described acetylene cleaning produces, clorox waste water recycling operation comprise dephosphorization apparatus, ceramic membrane filter device, reverse osmosis membrane processing device, Rinsing Area, the concentrated liquid bath that is connected successively; Clorox waste water is pumped to dephosphorization apparatus by water outlet and carries out dephosphorization; Clorox waste water lifting after dephosphorization to ceramic membrane filter device, is removed a small amount of solid impurity and micro-insoluble substance; Clorox waste water lifting after ceramic membrane filter to reverse osmosis membrane processing device carries out dechlorination to be processed; Clorox waste water is after the reverse osmosis membrane processing device is processed, and the clear water of generation enters Rinsing Area, directly enters afterwards water workshop section and uses, and the dense water of generation enters concentrated liquid bath, enters afterwards dense water treatment operation.
A kind of method of the clorox waste water recycling that described acetylene cleaning produces, dephosphorization apparatus comprise oxidation unit, baffling groove, retort, the medial launder that is connected successively; Clorox waste water is pumped to oxidation unit by water outlet, add oxygenant oxidation phosphorus at a low price in oxidation unit, enter afterwards the baffling groove, add in the baffling groove calcium hydroxide and sodium carbonate and with enter retort after clorox waste water after oxidation mixes and react, enter medial launder after reaction, afterwards clorox waste water lifting to the ceramic membrane filter device after dephosphorization is for further processing.
A kind of method of the clorox waste water recycling that described acetylene cleaning produces, dense water technology reclaims solid sodium salt afterwards for taking method of evaporation that dense water is processed.
A kind of method of the clorox waste water recycling that described acetylene cleaning produces, dense water technology is utilized again for evenly being replenished to primary brine process in chloralkali process.
The present invention is by taking acetylene gas, phosphide, muriate and other impurity in vacuum hydro-extraction, oxidation, membrane filtration, the method clorox waste water such as concentrated to process, zero release and recycling to clorox waste water have been realized, reclaim acetylene gas, saved water one time, reclaimed simultaneously the chlorine root, have certain economic benefit, social benefit and environmental benefit, reached purpose energy-saving and cost-reducing, that reduce discharging environmental protection, safety in production.The present invention can be widely used in being specially adapted in the production technique of calcium carbide legal system acetylene in the production technique of generated by polyvinyl chloride by calcium carbide resin.
Description of drawings:
Fig. 1 is the embodiments of the invention process flow sheet;
Fig. 2 is equipment and the process schematic representation of acetylene gas treatment unit in Fig. 1;
Fig. 3 is equipment and the process schematic representation of dephosphorization apparatus in Fig. 1.
In Fig. 1-3: 1 for grug feeding jar, 5 for rear PH meter, 6 for vacuum hydro-extraction tower, 7 for blow-down pipe, 8 for online detecting oxygen device, 9 for gas-liquid separator, 10 for water ring vacuum pump, 11 for go out water pump, 12 for nitrogen inlet pipe, 13 for liquid distributor, 14 for filler, 15 for clorox wastewater trough, 16 for oxidation unit, 17 for baffling groove, 18 for reactive tank, 19 is medial launder for mixing tank, 4 for phosphide removes device, 2 for front PH meter, 3.
Specific embodiments:
with reference to accompanying drawing 1-3, entering peace and quiet tower from the chlorine bleach liquor in calcium carbide method acetylene production technique carries out peace and quiet to thick acetylene gas, enter the next operation use of calcium carbide method acetylene production technique from the high purity acetylene gas of peace and quiet tower generation, the clorox waste water that produces is further processed, described method is for the technique of having carried out following recycling from peace and quiet tower clorox waste water out: an acetylene gas treatment unit is set after peace and quiet tower, to deviate from the acetylene gas that dissolves clorox waste water to the acetylene gas treatment unit from peace and quiet tower clorox waste water lifting out, the clorox waste water of deviating from after acetylene gas is sent into clorox waste water recycling operation,
With reference to accompanying drawing 2, another embodiment difference is that the acetylene gas treatment unit comprises vacuum hydro-extraction tower 6, negative pressure device and goes out water pump 11, and negative pressure device is connected with the top of vacuum hydro-extraction tower, goes out water pump and is connected with the bottom of vacuum hydro-extraction tower; Capable filler 14 is set in the vacuum hydro-extraction tower, and the filler bottom arranges liquid distributor 13; Will be from peace and quiet tower clorox waste water lifting out to the vacuum hydro-extraction tower, under the effect of negative pressure device, by dividing potential drop in the water in reduction vacuum hydro-extraction tower, the acetylene gas in clorox waste water is deviate from, the acetylene gas of deviating from is by vacuum hydro-extraction top of tower acetylene house steward gas holder before negative pressure device enters cooling tower, clorox waste water after degassed by the vacuum hydro-extraction tower bottom out is pumped into clorox waste water recycling operation by water outlet;
With reference to accompanying drawing 1, another embodiment difference is that clorox waste water recycling operation comprises dephosphorization apparatus, ceramic membrane filter device, reverse osmosis membrane processing device, Rinsing Area, the concentrated liquid bath that is connected successively; Clorox waste water is pumped to dephosphorization apparatus by water outlet and carries out dephosphorization; Clorox waste water lifting after dephosphorization to ceramic membrane filter device, is removed a small amount of solid impurity and micro-insoluble substance; Clorox waste water lifting after ceramic membrane filter to reverse osmosis membrane processing device carries out dechlorination to be processed; Clorox waste water is after the reverse osmosis membrane processing device is processed, and the clear water of generation enters Rinsing Area, directly enters afterwards water workshop section and uses, and the dense water of generation enters concentrated liquid bath, enters afterwards dense water treatment operation;
With reference to accompanying drawing 3, another embodiment difference is that dephosphorization apparatus comprises oxidation unit 16, baffling groove 17, retort 18, the medial launder 19 that is connected successively; Clorox waste water is pumped to clorox wastewater trough 15 by water outlet, be promoted to again oxidation unit, add oxygenant oxidation phosphorus at a low price in oxidation unit, enter afterwards the baffling groove, add in the baffling groove calcium hydroxide and sodium carbonate and with enter retort after clorox waste water after oxidation mixes and react, enter medial launder after reaction, afterwards clorox waste water lifting to the ceramic membrane filter device after dephosphorization is for further processing.
Another embodiment difference is that dense water technology for taking method of evaporation that dense water is processed, reclaims solid sodium salt afterwards;
Another embodiment difference is that dense water technology for evenly being replenished to primary brine process in chloralkali process, utilizes again.
Claims (6)
1. a kind of method of the clorox waste water recycling that produces of acetylene cleaning: enter peace and quiet tower from the chlorine bleach liquor in calcium carbide method acetylene production technique and carry out peace and quiet to thick acetylene gas, enter the next operation use of calcium carbide method acetylene production technique from the high purity acetylene gas of peace and quiet tower generation, the clorox waste water that produces is further processed, it is characterized in that, described method is for the technique of having carried out following recycling from peace and quiet tower clorox waste water out: an acetylene gas treatment unit is set after peace and quiet tower, to deviate from the acetylene gas that dissolves clorox waste water to the acetylene gas treatment unit from peace and quiet tower clorox waste water lifting out, the clorox waste water of deviating from after acetylene gas is sent into clorox waste water recycling operation.
2. a kind of method of the clorox waste water recycling that produces of acetylene cleaning according to claim 1, it is characterized in that: described acetylene gas treatment unit comprises vacuum hydro-extraction tower, negative pressure device and goes out water pump, negative pressure device is connected with the top of vacuum hydro-extraction tower, goes out water pump and is connected with the bottom of vacuum hydro-extraction tower; Be provided with filler in the vacuum hydro-extraction tower, the filler bottom arranges liquid distributor; Will be from peace and quiet tower clorox waste water lifting out to the vacuum hydro-extraction tower, under the effect of negative pressure device, by dividing potential drop in the water in reduction vacuum hydro-extraction tower, the acetylene gas in clorox waste water is deviate from, the acetylene gas of deviating from is by vacuum hydro-extraction top of tower acetylene house steward gas holder before negative pressure device enters cooling tower, clorox waste water after degassed by the vacuum hydro-extraction tower bottom out is pumped into clorox waste water recycling operation by water outlet.
3. a kind of method of the clorox waste water recycling that produces of acetylene cleaning according to claim 1 and 2, it is characterized in that: described clorox waste water recycling operation comprises dephosphorization apparatus, ceramic membrane filter device, reverse osmosis membrane processing device, Rinsing Area, the concentrated liquid bath that is connected successively; Clorox waste water is pumped to dephosphorization apparatus by water outlet and carries out dephosphorization; Clorox waste water lifting after dephosphorization to ceramic membrane filter device, is removed a small amount of solid impurity and micro-insoluble substance; Clorox waste water lifting after the ceramic membrane filter permeable membrane treatment unit that is all-trans carries out dechlorination and processes; Clorox waste water is after the reverse osmosis membrane processing device is processed, and the clear water of generation enters Rinsing Area, directly enters afterwards water workshop section and uses, and the dense water of generation enters concentrated liquid bath, enters afterwards dense water treatment operation.
4. a kind of method of the clorox waste water recycling that produces of acetylene cleaning according to claim 3, it is characterized in that: described dephosphorization apparatus comprises oxidation unit, baffling groove, retort, the medial launder that is connected successively; Clorox waste water is pumped to oxidation unit by water outlet, add oxygenant oxidation phosphorus at a low price in oxidation unit, enter afterwards the baffling groove, add in the baffling groove calcium hydroxide and sodium carbonate and with enter retort after clorox waste water after oxidation mixes and react, enter medial launder after reaction, afterwards clorox waste water lifting to the ceramic membrane filter device after dephosphorization is for further processing.
5. a kind of method of the clorox waste water recycling that produces of acetylene cleaning according to claim 3, it is characterized in that: described dense water technology reclaims solid sodium salt afterwards for taking method of evaporation that dense water is processed.
6. in a kind of acetylene production process according to claim 3, embrane method is recycled the method for clorox waste water, and it is characterized in that: described dense water technology is utilized again for evenly being replenished to primary brine process in chloralkali process.
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Cited By (5)
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| CN105268207A (en) * | 2014-11-27 | 2016-01-27 | 青岛科技大学 | Technology and device for acetylene desorption and complex formulation of waste sodium hypochlorite solution |
| CN107879501A (en) * | 2017-09-28 | 2018-04-06 | 内蒙古君正化工有限责任公司 | A kind of method of the recovery containing sodium hypochlorite waste water |
| CN110845063A (en) * | 2019-08-22 | 2020-02-28 | 青海宜化化工有限责任公司 | Acetylene sodium hypochlorite cleaning waste liquid circulation zero-emission system for PVC production process |
| CN111348782A (en) * | 2020-04-03 | 2020-06-30 | 唐山三友氯碱有限责任公司 | Method for removing and recycling phosphorus in acetylene-cleaned waste sodium hypochlorite |
| CN115432874A (en) * | 2021-06-01 | 2022-12-06 | 天辰化工有限公司 | Comprehensive utilization method of phosphorus-containing wastewater |
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| CN111348782A (en) * | 2020-04-03 | 2020-06-30 | 唐山三友氯碱有限责任公司 | Method for removing and recycling phosphorus in acetylene-cleaned waste sodium hypochlorite |
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