CN104402142B - A kind of method of sewage disinfection treatment in hydrogen dioxide solution production by anthraquinone process industry - Google Patents
A kind of method of sewage disinfection treatment in hydrogen dioxide solution production by anthraquinone process industry Download PDFInfo
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- CN104402142B CN104402142B CN201410696802.0A CN201410696802A CN104402142B CN 104402142 B CN104402142 B CN 104402142B CN 201410696802 A CN201410696802 A CN 201410696802A CN 104402142 B CN104402142 B CN 104402142B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5227—Processes for facilitating the dissolution of solid flocculants in water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/32—Hydrocarbons, e.g. oil
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
Abstract
A kind of method of sewage disinfection treatment in hydrogen dioxide solution production by anthraquinone process industry, the method is processed by the waste water discharged when hydrogenation tower, hydrogenation carclazyte bed or aftertreatment carclazyte bed steam blowing, first by alum purification of water by the working fluid that suspends in sewage with the isolated in form of flocs unit out, reduce the oils in sewage, reduce the COD of sewage, re-use the flucculation structure that alkaline matter (preferred salt of wormwood) destroys flocs unit, working fluid is separated. Compared with prior art, the present invention has following useful effect: 1, after pre-treatment, and the oily substance in sewage reduces by more than 70%, COD and greatly reduces, and processing costs reduces. 2, by a large amount of practical production experience, this kind of sewage of every 100m3 can produce throw out and be about 2.5m3, it is about 1:2.5 that throw out transforms the ratio of rear working fluid and water after treatment, therefore every 100m3 sewage working fluid yield increase about 0.8m3 after pretreatment, add working fluid yield, reduce and consume, reduce production cost.
Description
Technical field
The present invention relates to the method for sewage disinfection treatment in a kind of hydrogen dioxide solution production by anthraquinone process industry.
Background technology
In hydrogen dioxide solution production by anthraquinone process, be filled with a large amount of palladium catalyst in hydrogenation tower, there is hydrogenation in working fluid and hydrogen in tower, makes the effective anthraquinone in working fluid be changed into hydrogen anthracene quinone, and hydrogen anthracene quinone generates hydrogen peroxide with oxygen reaction after entering oxidation operation. Along with duration of service increases, hydrogenation tower hydrogenation efficiency drops to a certain degree, just certain tower joint must be regenerated, working fluid in tower is mainly first discharged by renovation process, re-use steaming out, working fluid in hydrogenation tower is blown and sweeps clean, then unload out by catalyst and carry out sub-sieve, be subsequently installed onto in tower and use Hydrogen activation. It is filled with a large amount of activated alumina balls in hydrogenation carclazyte bed and aftertreatment carclazyte bed, hydrogenation carclazyte bed institute role mainly becomes effective anthraquinone the ring oxygen anthraquinone degradation products reduction in hydride, aftertreatment carclazyte bed institute role be the anthraquinone degradation products that generates of regeneration hydrogenation and absorption working fluid are carried secretly solution of potassium carbonate, moisture content, and decompose remaining hydrogen peroxide, therefore, activated alumina ball in hydrogenation carclazyte bed and aftertreatment carclazyte bed needs regularly to change, to ensure stably manufactured. The working fluid of the inside is first discharged, then is carried out blowing sweeping with steam after stopping using by hydrogenation carclazyte bed or aftertreatment carclazyte bed, is blown by the working fluid that alumina balls adsorb and sweeps totally, could be drawn off by alumina balls after lowering the temperature. The process of above-mentioned steaming out can produce a large amount of sewage, accounts for more than the 60% of whole hydrogen peroxide trade effluent. This kind of COD of sewage is often up to tens thousand of, process difficulty is very big, major cause is: with in steaming out hydrogenation tower, hydrogenation carclazyte bed or aftertreatment carclazyte bed process, steam condensate fully mixes with the working fluid of residual, working fluid with very tiny oily pearl form dispersion suspension in sewage, it is difficult to allow working fluid precipitate out by standing way, so the COD of this kind of sewage is often up to tens thousand of, use conventional way process be not only difficult to be down to the COD of sewage qualified, and running cost is very high, cause the waste of working fluid simultaneously.
Summary of the invention
The technical problem to be solved in the present invention is, the method of sewage disinfection treatment in a kind of hydrogen dioxide solution production by anthraquinone process industry is provided, first by alum purification of water by the working fluid that suspends in sewage with the isolated in form of flocs unit out, reduce the oils in sewage, reduce the COD of sewage, re-use alkaline matter to destroy the flucculation structure of flocs unit, working fluid is separated, improve working fluid yield, reduce production cost.
The technical scheme solved the problems of the technologies described above is: a kind of method of sewage disinfection treatment in hydrogen dioxide solution production by anthraquinone process industry, comprises the following steps:
Step one: the waste water discharged when hydrogenation tower, hydrogenation carclazyte bed or aftertreatment carclazyte bed steam blowing being introduced layering pond and carries out stratification, bottom one layer is sewage;
Step 2: one layer, bottom sewage is sent into sewage stirring tank;
Step 3: the agitator opening sewage stirring tank, and add concentration 80 ~ 90% phosphoric acid to sewage stirring tank, every cubic metre of sewage need to use phosphatase 11 ~ 1.5kg, then continue to add mineral acid the pH of sewage is adjusted to 5 ~ 6;
Step 4: add alum to sewage stirring tank, every cubic metre of sewage need to use alum 1.5 ~ 2.5kg, stirs 15 ~ 25 minutes;
Step 5: respectively add anionic flocculant and cationic flocculant to sewage stirring tank, every cubic metre of sewage need to use anionic flocculant and cationic flocculant to be 0.001 ~ 0.002kg, continues stirring 3 ~ 8 minutes;
Step 6: when seeing that flocs unit occurs in sewage, all enters settling bowl by the sewage in still, carries out stratification;
Step 7: sewage left standstill after 1 ~ 2 hour, flocs unit and water stratification, upper strata is flocculation waste residue, and lower floor is the water that COD drops to below 3000mg/L;
Step 8: the waste residue that flocculated on upper strata is concentrated and received in reaction tank by blowback, is furnished with whipping appts in reaction tank;
Step 9: the whipping appts opening reaction tank stirs, makes original agglomerate shape flocculation waste residue try one's best into slurry shape;
Step 10: add appropriate alkaline matter in reaction tank, every cubic metre of flocculation waste residue need to use alkaline matter 80 ~ 120kg, and ceaselessly stirs, and allows alkaline matter dissolve as early as possible; Described alkaline matter be the one in salt of wormwood, soda ash, caustic soda and potassium hydroxide, two kinds, three kinds or four kinds;
Step 11: all dissolving from flocculation waste residue and become liquid and see that working fluid is counted precipitating out gradually, close the whipping appts of reaction tank, stratification after 15 ~ 40 minutes, after stratification, upper strata is working fluid, and lower floor is aqueous phase;
Step 12: the working fluid in recycling step 11, the lower floor's aqueous phase in step 11 and the water in step 7 can process according to a conventional method further.
Described reaction tank is also provided with heating unit, in step 8, adds after flocculation waste residue terminates and open heating unit, make the heating material to 50 in reaction tank ~ 60 DEG C, and maintain this temperature, when closing the whipping appts of reaction tank to step 11, stop heating.
In step 3, the mineral acid for adjust ph is nitric acid, sulfuric acid, hydrochloric acid or phosphoric acid.
The whipping appts being furnished with in described reaction tank is air stirrer or mechanical stirring device.
Described anionic flocculant is anionic polyacrylamide, and described cationic flocculant is cationic polyacrylamide.
After step one stratification, one layer, the top, layering pond is working fluid, and the working fluid that step one and step 11 stratification obtain reclaims and cleans into configuration still, sends into production system after qualified.
Described layering pond is made up of the N number of pond being connected by overflow manner successively, the value of N is 3 ~ 10, by the flow direction of waste water, the pond that waste water finally flows to is Shi great pond, N number of pond, the 1st pond above, the 2nd pond to Shi little pond, the N-1 pond, big pond volume is 10 ~ 20 times of little pond volume.
The wall bottom that described overflow manner refers between adjacent 2 ponds has overflow hole, corresponding overflow hole is provided with divider wall, divider wall height is lower than pond height 1/5, after sewage flows through overflow hole, being isolated wall to block, the water level in only current 1 pond overflow could enter rear 1 pond higher than divider wall.
The present invention is first by alum purification of water by the working fluid that suspends in sewage with the isolated in form of flocs unit out, reduce the oils in sewage, reduce the COD of sewage, re-use the flucculation structure that alkaline matter (preferred salt of wormwood) destroys flocs unit, working fluid is separated, compared with prior art, the present invention has following useful effect:
1, after pre-treatment, the oily substance in sewage reduces by more than 70%, COD and greatly reduces, and sewage disposal expense reduces.
2, by a large amount of practical production experience, this kind of sewage of every 100m3 can produce throw out and be about 2.5m3, the ratio that throw out transforms rear working fluid and water after treatment is about about 1:2.5, therefore every 100m3 sewage working fluid yield increase about 0.8m3 after pretreatment, add working fluid yield, reduce and consume, reduce production cost.
Below, the technology feature of the method for sewage disinfection treatment in a kind of hydrogen dioxide solution production by anthraquinone process industry of the present invention is further described in conjunction with the embodiments.
Accompanying drawing explanation
Fig. 1: the apparatus structure schematic diagram that in a kind of hydrogen dioxide solution production by anthraquinone process industry of the present invention, the method for sewage disinfection treatment uses.
Fig. 2-Fig. 3: the layering pool structure schematic diagram that the embodiment of the present invention one uses.
Fig. 2: vertical view; The Q-Q sectional view of Fig. 3: Fig. 2.
In figure: 1-layering pond, 101-divider wall, 102-overflow hole, 2-surge pump I, 3-configures still, and 31-configures still agitator, 32-visor, 4-configures still pump, 5-sump pump I, 6-sewage Buffer Pool, 7-sump pump II, 8-sewage stirring tank, 81-stirring tank agitator, 9-settling bowl, 10-surge pump II, 11-reaction tank, 12-surge pump III.
In figure: P1 represents the sewage from hydrogenation tower, hydrogenation carclazyte bed or aftertreatment carclazyte bed, P2 represents working fluid, P3 represents sewage, and P4 represents air, and P5 represents steam, P6 represents recirculated water backwater, P7 represents water on recirculated water, and P8 represents phlegma, and P9 represents that working fluid sends into system, P10 represents that sending to subsequent processing processes, and P11 represents flocculation waste residue.
Embodiment
Embodiment one:
A method for sewage disinfection treatment in hydrogen dioxide solution production by anthraquinone process industry, the device (as shown in Figure 1) that the method uses comprises the equipment such as layering pond 1, surge pump I 5, configuration still 3, configuration still pump 4, sump pump I 5, sewage stirring tank 8, settling bowl 9, surge pump II 10, reaction tank 11, surge pump III 12, the length in layering pond, wide, height is respectively 10m, 8m, 2.5m, inside is divided into 4 little ponds and a big pond, by the flow direction of waste water, it is respectively the little pond A being connected successively by overflow manner, little pond B, little pond C, little pond D(length �� wide �� height=2 �� 2 �� 2.5, unit is m) He 1 big pond E(length �� wide �� high=8 �� 8 �� 2.5, unit is m), as shown in accompanying drawing 2-Fig. 3, the wall bottom that described overflow manner refers between adjacent 2 ponds has overflow hole 102, corresponding overflow hole is provided with divider wall 101, divider wall height is lower than pond height 1/5, after sewage flows through overflow hole, it is isolated wall to block, water level in only current 1 pond overflow could enter rear 1 pond higher than divider wall. the overflow hole height in each pond is 0.4m, and wide is 0.4m, and the overflow divider wall length in each pond is 0.4m, and wide is 0.4m, and height is 2m, configuration still cubic capacity is 6m3, is accompanied with whipping appts and the chuck of heating or cooling, sewage stirring tank cubic capacity is 8m3, is accompanied with whipping appts, length and width, the height of reaction tank are respectively 6m, 5m, 2m.
The method realizes the pre-treatment of sewage in hydrogen peroxide industry by following step. (1) waste water discharged when hydrogenation tower, hydrogenation carclazyte bed or aftertreatment carclazyte bed steam blowing is introduced in the A pond in layering pond, sewage successively flows into B, C, D pond by overflow manner, final inflow E pond, owing to working fluid density is less than water, therefore working fluid stops substantially in ABCD tetra-little ponds, the sewage in E pond is substantially without working fluid; (2) with surge pump I, the working fluid in ABCD pond is reclaimed into configuration still, add-on is about 4m3, open the stirring of configuration still, add 1m3 deionized water simultaneously and carry out cleaning about 15 minutes, stirring of stopping, after working fluid and water stratification, opening configuration still and lead the pouring forward and backward valve of visor, water is entered sewage lagoon, this cleaning step carries out three times altogether, after working fluid cleaning is qualified, by configuring still pump, working fluid is sent into production system; (3) by sump pump I, the sewage in layering pond being sent into sewage stirring tank, add-on is 6m3; (4) open the agitator of sewage stirring tank, and add 9kg phosphoric acid (phosphoric acid concentration about 85%) to sewage stirring tank, then continue to add about 50kg dust technology (concentration of nitric acid is 42%), the pH of sewage is adjusted to 5 ~ 6; (5) alum 2kg need to be used by every cubic metre of sewage, add the alum of 12kg to sewage stirring tank, stir 20 minutes; (6) respectively add the anions and canons flocculation agent of 0.006kg to sewage stirring tank, continue to stir 5 minutes; (7) when see sewage occurs flocs unit (alumen ustum) time, open sewage stirring tank outlet valve, the sewage in still all entered settling bowl; (8) sewage left standstill after about 1 hour, flocs unit and water stratification, and upper strata is flocculation waste residue, and lower floor is water, and now the COD of water drops to below 3000mg/L, and additive method can be used to process further; (9) by surge pump II, waste residue centralized recovery is flocculated to reaction tank (being furnished with steam heater and air stirrer in reaction tank) in upper strata; (10) when the flocculation waste residue yield in reaction tank reaches 15m3, the air intlet valve opening reaction tank stirs, original agglomerate shape flocculation waste residue is made to try one's best into slurry shape, open reaction tank steam inlet valve and condensate outlet valve simultaneously, giving flocculation waste residue heating, the temperature of heating is 60 DEG C; After (11) 20 minutes, in reaction tank, slowly add the salt of wormwood of 1.5 tons, and ceaselessly stir and heating, make temperature maintain 60 DEG C, allow salt of wormwood dissolve as early as possible; Suitably heat to waste residue while adding salt of wormwood, it is possible not only to the dissolving accelerating salt of wormwood, reduces the treatment time, and be conducive to follow-up work liquid and aqueous phase layering. (12) waste residue that flocculates all dissolves and becomes liquid and see that working fluid precipitates out gradually, close pneumatic blending after 40 minutes and stop heating, allow the material stratification in reaction tank, after stratification, upper strata is working fluid, the volume of working fluid is 4.5m3, and lower floor is water, and the volume of water is 10.5m3; (13) entering to configure still by the working fluid in surge pump III recycling step 12 and clean, cleaning process is identical with step (2), and the water of lower floor is delivered to next sewage disposal operation together with the water in step (8) and done further process.
In embodiment one, the salt of wormwood used is technical grade salt of wormwood, should not use the waste product of salt of wormwood, in order to avoid introducing other impurity, pollutes working fluid; As a kind of conversion of embodiment one, it is possible to adjust the consumption of salt of wormwood according to different situations, salt of wormwood consumption is more many, and effect is more good, but to be avoided salt of wormwood too much can not to dissolve completely, cause waste; Generally salt of wormwood 80 ~ 120kg need to be used to calculate by the every cubic metre of waste residue that flocculates. In addition, it is also possible to use the basic materials such as soda ash, caustic soda, potassium hydroxide to be used alone or as a mixture, to replace salt of wormwood, but the effect using salt of wormwood is best.
Embodiment two:
A method for sewage disinfection treatment in hydrogen dioxide solution production by anthraquinone process industry, the device that the method uses is identical with embodiment one, and the method realizes the pre-treatment of sewage in hydrogen peroxide industry by following step. (1) waste water discharged when hydrogenation tower, hydrogenation carclazyte bed or aftertreatment carclazyte bed steam blowing is introduced in the A pond in layering pond, sewage successively flows into B, C, D pond by overflow manner, final inflow E pond, owing to working fluid density is less than water, therefore working fluid stops substantially in ABCD tetra-little ponds, the sewage in E pond is substantially without working fluid; (2) with surge pump I, the working fluid in ABCD pond is reclaimed into configuration still, add-on is about 4m3, open the stirring of configuration still, add 1m3 deionized water simultaneously and carry out cleaning about 15 minutes, stirring of stopping, after working fluid and water stratification, opening configuration still and lead the pouring forward and backward valve of visor, water is entered sewage lagoon, this cleaning step carries out three times altogether, after working fluid cleaning is qualified, by configuring still pump, working fluid is sent into production system; (3) by sump pump I, the sewage in layering pond being sent into sewage stirring tank, add-on is 6m3; (4) open the agitator of sewage stirring tank, and add 9kg phosphoric acid (phosphoric acid concentration about 85%) to sewage stirring tank, then continue to add about 70kg hydrochloric acid (concentration of hydrochloric acid is 33%), the pH of sewage is adjusted to 5 ~ 6; (5) alum 2kg need to be used by every cubic metre of sewage, add the alum of 12kg to sewage stirring tank, stir 20 minutes; (6) respectively add the anions and canons flocculation agent of 0.006kg to sewage stirring tank, continue to stir 5 minutes; (7) when see sewage occurs flocs unit (alumen ustum) time, open sewage stirring tank outlet valve, the sewage in still all entered settling bowl; (8) sewage left standstill after about 1 hour, flocs unit and water stratification, and upper strata is flocculation waste residue, and lower floor is water, and now the COD of water drops to below 3000mg/L, and additive method can be used to process further; (9) by surge pump II, waste residue centralized recovery is flocculated to reaction tank (being furnished with steam heater and air stirrer in reaction tank) in upper strata; (10) when the flocculation waste residue yield in reaction tank reaches 15m3, the air intlet valve opening reaction tank stirs, original agglomerate shape flocculation waste residue is made to try one's best into slurry shape, open reaction tank steam inlet valve and condensate outlet valve simultaneously, giving flocculation waste residue heating, the temperature of heating is 60 DEG C; After (11) 20 minutes, in reaction tank, add the caustic soda of 1.2 tons of salt of wormwood and 0.7 ton successively, and ceaselessly stir and heating, make temperature maintain 60 DEG C, allow salt of wormwood and caustic soda dissolve as early as possible; Suitably heat to waste residue while adding salt of wormwood and caustic soda, it is possible not only to the dissolving accelerating salt of wormwood and caustic soda, reduces the treatment time, and be conducive to follow-up work liquid and aqueous phase layering. (12) waste residue that flocculates all dissolves and becomes liquid and see that working fluid precipitates out gradually, closes pneumatic blending and stop heating after 40 minutes, allows the material stratification in reaction tank, after stratification, the volume of working fluid is 4m3, and lower floor is water, and the volume of water is 11m3; (13) entering to configure still by the working fluid in surge pump III recycling step 12 and clean, cleaning process is identical with step (2), and the water of lower floor is delivered to next sewage disposal operation together with the water in step (8) and done further process.
In various embodiments of the present invention, described anionic flocculant is anionic polyacrylamide, and described cationic flocculant is cationic polyacrylamide. Convert as one, it is also possible to use other positive and negative ionic flocculants satisfactory.
As a kind of conversion of each embodiment, the alkaline matter added in step (11), it is possible to be the one in salt of wormwood, soda ash, caustic soda and potassium hydroxide, or the mixture of two kinds, three kinds or four kinds in salt of wormwood, soda ash, caustic soda and potassium hydroxide.
As a kind of conversion of each embodiment, described reaction tank can not also arrange heating unit, by stirring, salt of wormwood be dissolved, but effect is not best. Other equipment with mechanical stirring and heating unit can also be selected to replace reaction tank.
As a kind of conversion of each embodiment, it is possible to use other acid such as nitric acid, sulfuric acid, hydrochloric acid, phosphoric acid regulate the pH value of sewage; But suitable phosphoric acid add-on can significantly improve flocculating effect; It is generally adopt phosphoric acid or the composition of phosphoric acid and other acid is to regulate the pH value of sewage.
As another conversion of each embodiment, described layering pond without separating into several little ponds, but can also be made up of a big pond.
Claims (8)
1. the method for sewage disinfection treatment in a hydrogen dioxide solution production by anthraquinone process industry, it is characterised in that: comprise the following steps:
Step one: the waste water discharged when hydrogenation tower, hydrogenation carclazyte bed or aftertreatment carclazyte bed steam blowing being introduced layering pond and carries out stratification, bottom one layer is sewage;
Step 2: one layer, bottom sewage is sent into sewage stirring tank;
Step 3: the agitator opening sewage stirring tank, and add concentration 80 ~ 90% phosphoric acid to sewage stirring tank, every cubic metre of sewage need to use phosphatase 11 ~ 1.5kg, then continue to add mineral acid the pH of sewage is adjusted to 5 ~ 6;
Step 4: add alum to sewage stirring tank, every cubic metre of sewage need to use alum 1.5 ~ 2.5kg, stirs 15 ~ 25 minutes;
Step 5: respectively add anionic flocculant and cationic flocculant to sewage stirring tank, every cubic metre of sewage need to use anionic flocculant and cationic flocculant to be 0.001 ~ 0.002kg, continues stirring 3 ~ 8 minutes;
Step 6: when seeing that flocs unit occurs in sewage, all enters settling bowl by the sewage in still, carries out stratification;
Step 7: sewage left standstill after 1 ~ 2 hour, flocs unit and water stratification, upper strata is flocculation waste residue, and lower floor is the water that COD drops to below 3000mg/L;
Step 8: the waste residue that flocculated on upper strata is concentrated and received in reaction tank by blowback, is furnished with whipping appts in reaction tank;
Step 9: the whipping appts opening reaction tank stirs, makes original agglomerate shape flocculation waste residue try one's best into slurry shape;
Step 10: add appropriate alkaline matter in reaction tank, every cubic metre of flocculation waste residue need to use alkaline matter 80 ~ 120kg, and ceaselessly stirs, and allows alkaline matter dissolve as early as possible; Described alkaline matter be the one in salt of wormwood, soda ash, caustic soda and potassium hydroxide, two kinds, three kinds or four kinds;
Step 11: all dissolving from flocculation waste residue and become liquid and see that working fluid is counted precipitating out gradually, close the whipping appts of reaction tank, stratification after 15 ~ 40 minutes, after stratification, upper strata is working fluid, and lower floor is aqueous phase;
Step 12: the working fluid in recycling step 11, the lower floor's aqueous phase in step 11 and the water in step 7 can process according to a conventional method further.
2. the method for sewage disinfection treatment in a kind of hydrogen dioxide solution production by anthraquinone process industry according to claim 1, it is characterized in that: described reaction tank is also provided with heating unit, in step 8, add after flocculation waste residue terminates and open heating unit, make the heating material to 50 in reaction tank ~ 60 DEG C, and maintain this temperature, stop heating when closing the whipping appts of reaction tank to step 11.
3. the method for sewage disinfection treatment in a kind of hydrogen dioxide solution production by anthraquinone process industry according to claim 1 and 2, it is characterised in that: in step 3, the mineral acid for adjust ph is nitric acid, sulfuric acid, hydrochloric acid or phosphoric acid.
4. the method for sewage disinfection treatment in a kind of hydrogen dioxide solution production by anthraquinone process industry according to claim 1 and 2, it is characterised in that: the whipping appts being furnished with in described reaction tank is air stirrer or mechanical stirring device.
5. the method for sewage disinfection treatment in a kind of hydrogen dioxide solution production by anthraquinone process industry according to claim 1 and 2, it is characterised in that: described anionic flocculant is anionic polyacrylamide, and described cationic flocculant is cationic polyacrylamide.
6. the method for sewage disinfection treatment in a kind of hydrogen dioxide solution production by anthraquinone process industry according to claim 1 and 2, it is characterized in that: after step one stratification, one layer, the top, layering pond is working fluid, the working fluid that step one and step 11 stratification obtain reclaims and cleans into configuration still, sends into production system after qualified.
7. the method for sewage disinfection treatment in a kind of hydrogen dioxide solution production by anthraquinone process industry according to claim 1 and 2, it is characterized in that: described layering pond is made up of the N number of pond being connected by overflow manner successively, the value of N is 3 ~ 10, by the flow direction of waste water, the pond that waste water finally flows to is Shi great pond, N number of pond, the 1st pond above, the 2nd pond to Shi little pond, the N-1 pond, big pond volume is 10 ~ 20 times of little pond volume.
8. the method for sewage disinfection treatment in a kind of hydrogen dioxide solution production by anthraquinone process industry according to claim 7, it is characterized in that: the wall bottom that described overflow manner refers between adjacent 2 ponds has overflow hole, corresponding overflow hole is provided with divider wall, divider wall height is lower than pond height 1/5, after sewage flows through overflow hole, being isolated wall to block, the water level in only current 1 pond overflow could enter rear 1 pond higher than divider wall.
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| CN201410696802.0A CN104402142B (en) | 2014-11-26 | 2014-11-26 | A kind of method of sewage disinfection treatment in hydrogen dioxide solution production by anthraquinone process industry |
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| CN109534429A (en) * | 2018-11-20 | 2019-03-29 | 黎明化工研究设计院有限责任公司 | Sewerage pretreatment method in a kind of process for prepairng hydrogen peroxide by anthraquinone |
Citations (4)
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| EP0687649A1 (en) * | 1994-05-31 | 1995-12-20 | Degussa Aktiengesellschaft | Process for the separation of a catalyst-free work solution from the hydrogenation cycle of the anthrachinone process for the preparation of hydrogen peroxide |
| JPH08337405A (en) * | 1995-06-15 | 1996-12-24 | Sumitomo Chem Co Ltd | Method for refining hydrogen peroxide water |
| CN101041446A (en) * | 2007-03-09 | 2007-09-26 | 广东中成化工股份有限公司 | Treatment method of waste potasium carbonate solution during production process of hydrogen dioxide solution by anthraquinones method |
| CN104003496A (en) * | 2013-02-22 | 2014-08-27 | 上海阿科玛双氧水有限公司 | Treatment technology of wastewater generated in preparation of hydrogen peroxide from anthraquinone |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0687649A1 (en) * | 1994-05-31 | 1995-12-20 | Degussa Aktiengesellschaft | Process for the separation of a catalyst-free work solution from the hydrogenation cycle of the anthrachinone process for the preparation of hydrogen peroxide |
| JPH08337405A (en) * | 1995-06-15 | 1996-12-24 | Sumitomo Chem Co Ltd | Method for refining hydrogen peroxide water |
| CN101041446A (en) * | 2007-03-09 | 2007-09-26 | 广东中成化工股份有限公司 | Treatment method of waste potasium carbonate solution during production process of hydrogen dioxide solution by anthraquinones method |
| CN104003496A (en) * | 2013-02-22 | 2014-08-27 | 上海阿科玛双氧水有限公司 | Treatment technology of wastewater generated in preparation of hydrogen peroxide from anthraquinone |
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