CN103130369B - 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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- CN103130369B CN103130369B CN201110420152.3A CN201110420152A CN103130369B CN 103130369 B CN103130369 B CN 103130369B CN 201110420152 A CN201110420152 A CN 201110420152A CN 103130369 B CN103130369 B CN 103130369B
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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
Technical field
The present invention relates to a kind of method of Industrial Wastewater Treatment, be particularly 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 to carry out acetylene gas peace and quiet in acetylene cleaning process, the clorox waste water producing in this process becomes the quantity of wastewater effluent of acetylene system maximum.And be by the emphasis of energy-saving and emission-reduction by reclaiming and rationally utilize containing clorox waste water of producing in acetylene cleaning operation.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, two kinds of ways of recycling of most use in industry at present, the first is directly to enter producer to react with calcium carbide; The second is that the clorox of useless sodium and high density is configured, and 0.08 ~ 0.12% the fresh clorox system of entering of being configured to recycles.Though two kinds of mode energy reuse clorox waste water, but all there is separately still unsolved drawback: first kind of way is delivered to producer by clorox waste water and directly reacted with calcium carbide, in this process, because containing a large amount of muriates in clorox waste water, after reaction, can produce the muriate of solid, cause chlorine-containing components in the carbide slag of generation to increase, cannot carry out the reuse of carbide slag, particularly manufacture in the process of cement at carbide slag, muriatic increasing can be caused very large impact to the quality of production system and cement products; The second way is that the clorox waste water below 0.06% and the clorox of high density are configured by concentration, the fresh clorox that is configured to concentration 0.08 ~ 0.12% carries out reuse, in this process, the acetylene gas dissolving in clorox waste water on the one hand easily reacts generation chloroacetylene blasts with high-concentrated sodium hypochlorite, 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, the next operation that the high purity acetylene gas producing from peace and quiet tower enters calcium carbide method acetylene production technique is used, the clorox waste water producing 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 peace and quiet tower, to deviate from the acetylene gas dissolving clorox waste water to 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 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; In vacuum hydro-extraction tower, be provided with filler, filler bottom arranges liquid distributor; By from peace and quiet tower clorox waste water lifting out to vacuum hydro-extraction tower, under the effect of negative pressure device, by reducing dividing potential drop in the water in 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 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 comprises connected successively dephosphorization apparatus, ceramic membrane filter device, reverse osmosis membrane processing device, Rinsing Area, concentrated liquid bath; 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 to 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 processing; Clorox waste water is after 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 comprises connected successively oxidation unit, baffling groove, retort, medial launder; Clorox waste water is pumped to oxidation unit by water outlet, in oxidation unit, add oxygenant oxidation phosphorus at a low price, enter afterwards baffling groove, in baffling groove, add calcium hydroxide and sodium carbonate and enter retort with the clorox waste water after oxidation after mixing and react, after reaction, enter medial launder, 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, for taking method of evaporation to process dense water, reclaims solid sodium salt afterwards.
A kind of method of the clorox waste water recycling that described acetylene cleaning produces, dense water technology, for being evenly replenished to primary brine process in chloralkali process, is utilized again.
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 are realized, reclaim acetylene gas, saved water one time, reclaimed chlorine root simultaneously, there is certain economic benefit, social benefit and environmental benefit, reached object energy-saving and cost-reducing, that reduce discharging environmental protection, safety in production.The present invention can be widely used in, in the production technique of generated by polyvinyl chloride by calcium carbide resin, being specially adapted in the production technique of calcium carbide legal system acetylene.
Brief description of the drawings:
Fig. 1 is 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 is that front pH meter, 3 is that mixing tank, 4 is that grug feeding jar, 5 is that rear pH meter, 6 is that vacuum hydro-extraction tower, 7 is that blow-down pipe, 8 is that online detecting oxygen device, 9 is that gas-liquid separator, 10 is that water ring vacuum pump, 11 is that nitrogen inlet pipe, 13 is that liquid distributor, 14 is that filler, 15 is that clorox wastewater trough, 16 is that oxidation unit, 17 is that baffling groove, 18 is that reactive tank, 19 is medial launder for going out water pump, 12 for phosphide removes device, 2.
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, the next operation that the high purity acetylene gas producing from peace and quiet tower enters calcium carbide method acetylene production technique is used, the clorox waste water producing 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 peace and quiet tower, to deviate from the acetylene gas dissolving clorox waste water to 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 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; In vacuum hydro-extraction tower, be provided with filler 14, filler bottom arranges liquid distributor 13; By from peace and quiet tower clorox waste water lifting out to vacuum hydro-extraction tower, under the effect of negative pressure device, by reducing dividing potential drop in the water in 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 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 connected successively dephosphorization apparatus, ceramic membrane filter device, reverse osmosis membrane processing device, Rinsing Area, concentrated liquid bath; 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 to 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 processing; Clorox waste water is after 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 connected successively oxidation unit 16, baffling groove 17, retort 18, medial launder 19; Clorox waste water is pumped to clorox wastewater trough 15 by water outlet, be promoted to again oxidation unit, in oxidation unit, add oxygenant oxidation phosphorus at a low price, enter afterwards baffling groove, in baffling groove, add calcium hydroxide and sodium carbonate and enter retort with the clorox waste water after oxidation after mixing and react, after reaction, enter medial launder, 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 to process dense water, reclaims solid sodium salt afterwards;
Another embodiment difference is that dense water technology, for being evenly replenished to primary brine process in chloralkali process, utilizes again.
Claims (5)
1. a kind of method of the clorox waste water recycling that acetylene cleaning produces: 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, the next operation that the high purity acetylene gas producing from peace and quiet tower enters calcium carbide method acetylene production technique is used, the clorox waste water producing 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 peace and quiet tower, to deviate from the acetylene gas dissolving clorox waste water to 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, described acetylene gas treatment unit comprises vacuum hydro-extraction tower, negative pressure device and goes 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, in vacuum hydro-extraction tower, be provided with filler, filler bottom arranges liquid distributor, by from peace and quiet tower clorox waste water lifting out to vacuum hydro-extraction tower, under the effect of negative pressure device, by reducing dividing potential drop in the water in 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 vacuum hydro-extraction tower bottom out, is pumped into clorox waste water recycling operation by water outlet.
2. a kind of method of the clorox waste water recycling that acetylene cleaning according to claim 1 produces, is characterized in that: described clorox waste water recycling operation comprises connected successively dephosphorization apparatus, ceramic membrane filter device, reverse osmosis membrane processing device, Rinsing Area, concentrated liquid bath; 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 to 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 processing; Clorox waste water is after 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.
3. a kind of method of the clorox waste water recycling that acetylene cleaning according to claim 2 produces, is characterized in that: described dephosphorization apparatus comprises connected successively oxidation unit, baffling groove, retort, medial launder; Clorox waste water is pumped to oxidation unit by water outlet, in oxidation unit, add oxygenant oxidation phosphorus at a low price, enter afterwards baffling groove, in baffling groove, add calcium hydroxide and sodium carbonate and enter retort with the clorox waste water after oxidation after mixing and react, after reaction, enter medial launder, afterwards clorox waste water lifting to the ceramic membrane filter device after dephosphorization is for further processing.
4. a kind of method of the clorox waste water recycling that acetylene cleaning according to claim 2 produces, is characterized in that: described dense water technology, for taking method of evaporation to process dense water, reclaims solid sodium salt afterwards.
5. a kind of method of the clorox waste water recycling that acetylene cleaning according to claim 2 produces, is characterized in that: described dense water technology, for being evenly replenished to primary brine process in chloralkali process, is utilized again.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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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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