CN101844828B - Treating method for efficiently catalyzing and oxidizing chlor-alkali industrial waste water - Google Patents
Treating method for efficiently catalyzing and oxidizing chlor-alkali industrial waste water Download PDFInfo
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- CN101844828B CN101844828B CN2010101839966A CN201010183996A CN101844828B CN 101844828 B CN101844828 B CN 101844828B CN 2010101839966 A CN2010101839966 A CN 2010101839966A CN 201010183996 A CN201010183996 A CN 201010183996A CN 101844828 B CN101844828 B CN 101844828B
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Abstract
The invention discloses a treating method for efficiently catalyzing and oxidizing chlor-alkali industrial waste water. In the method, sodium hypochlorite in the chlor-alkali industrial waste water is decomposed mainly by adding a nickel oxide catalyst with an efficient surface; and simultaneously a small amount of other pollutants in the waste water is degraded. The treating method for efficiently catalyzing and oxidizing the chlor-alkali industrial waste water of the invention comprises the following step of: making sodium hypochlorite-containing alkaline waste water continuously flow through a catalytic oxidation reaction bed filled with a catalyst from the bottom to the top at an air speed of between 1.6 and 2.6 h<-1>.
Description
Technical field
The present invention relates to a kind of processing method of industrial waste water, relate to a kind of treatment process of efficiently catalyzing and oxidizing chlor-alkali industrial waste water specifically.
Background technology
Chlorine industry is one of the most basic chemical industry, polyvinyl chloride (PVC) RESINS, caustic soda, hydrochloric acid.Chlorine-alkali products such as liquid chlorine all are national economy and the requisite material of people's lives, occupy critical role in national economy and national defense construction, but the chlor-alkali industry environmental pollution also is bigger simultaneously.Along with the enhancing of people's environmental protection consciousness, pollution of being caused in the chemical process based on chlorine industry and products thereof is more and more paid attention to the influence that environment causes.Therefore, when giving full play to chlorine industry and the effect of Chemical Manufacture in the national economic development, should reduce its disadvantageous effect to environment based on chlorine industry as far as possible.
In chlorine industry, can produce the alkaline waste water that contains clorox in a large number; Clorox is also used in a large number as SYNTHETIC OPTICAL WHITNER and sterilizing agent, also contains a large amount of chlorine residue in the waste water of discharge.The discharging of being rich in clorox waste water has not only caused a large amount of wastes of water resources, and environment and human lives have also been caused very big harm.Therefore, the discharging that contains the alkaline waste water of clorox has been subjected to strict control.Catalytic oxidation is the state-of-the-art technology of chemical field and a kind of efficient oxidation technology that corresponding efficient surface catalyst combines, and is the excellent means of handling wastewater of chemical industry with high concentration.The essence of catalytic oxidation is exactly the decomposition generation katalysis of catalyzer to oxygenant, the chemical reaction in the quickening waste water between organic pollutant and the oxygenant.Catalytic oxidation can reduce the chemical oxygen demand of waste water, improve the biodegradability of waste water, and cost is lower, has the favorable industrial prospect.
Summary of the invention:
The objective of the invention is at containing clorox in a large amount of trade effluents that discharge in the chlorine industry, bring the phenomenon of very big influence to environment and human lives, a kind of treatment process of efficiently catalyzing and oxidizing chlor-alkali industrial waste water is provided, mainly be to decompose clorox in the chlor-alkali industrial waste water, simultaneously a small amount of other pollutents in the waste water degraded by the nickel oxide catalyst that interpolation has an efficient surface.
Technical scheme of the present invention is as follows:
The treatment process of efficiently catalyzing and oxidizing chlor-alkali industrial waste water of the present invention, its step are that the alkaline waste water that will contain clorox is 1.6～2.6h with air speed from bottom to top
-1Continuously by the catalytic oxidation bed of catalyzer is housed.
The treatment process of efficiently catalyzing and oxidizing chlor-alkali industrial waste water of the present invention, its further technical scheme are that described catalyzer is nickel oxide loaded catalyzer; Further technical scheme is that described nickel oxide loaded Preparation of catalysts method is as follows again: earlier with the 100g carrier impregnation at 30～40% Ni (NO
3)
2In the solution, placing 10～15 hours, dry naturally, is in 5～10% the NaOH aqueous solution again to concentration expressed in percentage by weight with the air dried carrier impregnation, at the uniform velocity stirs under the normal temperature, and dipping time is 12～20 hours; And then, place 300～400 ℃ of following roastings of retort furnace 4～5 hours at 105～115 ℃ times dry 12～15 hours, and naturally cool to room temperature, promptly obtain nickel oxide loaded catalyzer; Further technical scheme is that described carrier is preferably Al again
2O
3, MgO or MgAl
2O
4
The treatment process of efficiently catalyzing and oxidizing chlor-alkali industrial waste water of the present invention, to account for the per-cent of nickel oxide loaded catalyzer total mass be 10～15% to the quality of burning nickel in its described nickel oxide loaded catalyzer.
Principle of the present invention is as follows:
Clorox decomposition reaction of the present invention is:
NaClO→NaCl+[O]
Nickel oxide catalytic decomposition clorox mechanism is:
The present invention mainly has following beneficial effect:
(1) preparation of loading type nickel oxide catalyst is simple, only needs simple dipping, roasting to use
(2) the present invention is in the chlor-alkali wastewater treatment that contains clorox, and technology is simple, running cost is cheap
(3), in decomposing waste water, in the clorox, can also make full use of and decompose the clorox generation according to method of the present invention
Active oxygen atom a small amount of other pollutent in the chlor-alkali waste water of degrading, reach the effect of the treatment of wastes with processes of wastes against one another.
Description of drawings
Fig. 1 is a treatment process process flow diagram of the present invention.
Among the figure: 1. contain clorox chlor-alkali waste water, 2. reservoir, 3. peristaltic pump, 4. jacketed reactor 5. goes out water storage tank, 6. circulation thermostatic water-circulator bath.
Embodiment:
Further specify the present invention below by specific examples, method for preparing catalyst used among the embodiment is as follows:
Earlier with 100gAl
2O
3Impregnated with particles is at 35% Ni (NO
3)
2In the solution, placing 10h, dry naturally, is in 7.5% the NaOH aqueous solution again to concentration expressed in percentage by weight with the air dried carrier impregnation, at the uniform velocity stirring under the normal temperature, and dipping time is 12h.At 110 ℃ of following dry 12h, place 350 ℃ of following roasting 4h of retort furnace, naturally cool to room temperature, the load that finally obtains this experiment usefulness has the aluminum trioxide catalyst of nickel, burns till afterwards that the weight metal percentage composition is 14% in the sample.
Embodiment 1: aluminium sesquioxide load nickel oxide catalyst catalytic oxidation treatment contains clorox chlor-alkali waste water
Reaction is to carry out in the reactor that is material with glass.The chlor-alkali waste water that will contain clorox places reservoir, utilizes peristaltic pump to regulate air speed, allow contain clorox alkaline waste water from bottom to top air speed be 1.6h
-1By the catalytic oxidation bed of 120g catalyzer is housed, catalyst decomposes the chlorine bleach liquor, the results are shown in Table 1 continuously.
Air speed sees Table 1 among the embodiment 2-6, and other condition and method the results are shown in Table 1 with embodiment 1:
Table 1 catalyzing oxidizing degrading contains clorox chlor-alkali waste water effect
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
|
|
| Air speed h -1 | 1.6 | 1.8 | 2.0 | 2.2 | 2.4 | 2.6 |
| NaClO transformation efficiency % | 98.8 | 97.6 | 96.7 | 77.2 | 66.5 | 58.3 |
From table experimental data as can be seen, chlor-alkali industrial waste water is with less than 2.0h
-1Air speed flow through the fixed-bed reactor of 120g catalyzer are housed after, the clorox degradation rate reaches more than 95% in the waste water, effect is remarkable.
Claims (3)
1. the treatment process of an efficiently catalyzing and oxidizing chlor-alkali industrial waste water is characterized in that may further comprise the steps:
The alkaline waste water that will contain clorox is 1.6～2.6h with air speed from bottom to top
-1Continuously by the catalytic oxidation bed of catalyzer is housed, wherein said catalyzer is nickel oxide loaded catalyzer, and described nickel oxide loaded Preparation of catalysts method is as follows: earlier with the 100g carrier impregnation at 30～40% Ni (NO
3)
2In the solution, placing 10～15 hours, dry naturally, is in 5～10% the NaOH aqueous solution again to concentration expressed in percentage by weight with the air dried carrier impregnation, at the uniform velocity stirs under the normal temperature, and dipping time is 12～20 hours; And then, place 300～400 ℃ of following roastings of retort furnace 4～5 hours at 105～115 ℃ times dry 12～15 hours, and naturally cool to room temperature, promptly obtain nickel oxide loaded catalyzer.
2. the treatment process of efficiently catalyzing and oxidizing chlor-alkali industrial waste water according to claim 1 is characterized in that described carrier is Al
2O
3, MgO or MgAl
2O
4
3. the treatment process of efficiently catalyzing and oxidizing chlor-alkali industrial waste water according to claim 1, the per-cent that the quality that it is characterized in that nickel oxide in the described nickel oxide loaded catalyzer accounts for nickel oxide loaded catalyzer total mass is 10～15%.
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| CN101844828B true CN101844828B (en) | 2011-12-14 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992468A (en) * | 2012-11-27 | 2013-03-27 | 常州大学 | Method for treating chlorine-containing waste water through catalytic oxidation |
| CN104084026B (en) * | 2014-07-18 | 2016-01-27 | 贵州大龙银星汞业有限责任公司 | The processing method of chloride tail gas in a kind of mercury chloride production |
| CN104085904A (en) * | 2014-07-18 | 2014-10-08 | 贵州大龙银星汞业有限责任公司 | Method for decomposing sodium hypochlorite |
| CN105797702A (en) * | 2014-12-30 | 2016-07-27 | 上海洗霸科技股份有限公司 | Novel supported catalyst, preparation method therefor and use of novel supported catalyst |
| CN106345485B (en) * | 2016-08-25 | 2018-12-07 | 万华化学集团股份有限公司 | A kind of catalyst and its preparation method and application for catalytic oxidation treatment organic wastewater |
| CN106492785A (en) * | 2016-08-31 | 2017-03-15 | 浙江奇彩环境科技股份有限公司 | A kind of catalyst and its method of wastewater treatment for dye wastewater treatment |
| CN106396075A (en) * | 2016-10-27 | 2017-02-15 | 华中科技大学 | Method for catalytically degrading organic wastewater by using sodium hypochlorite |
| CN106673253B (en) * | 2016-12-14 | 2019-09-27 | 安徽华塑股份有限公司 | A kind of processing method of chlor-alkali industrial waste water catalysis oxidation |
| CN112299651B (en) * | 2020-10-10 | 2022-12-16 | 浙江工业职业技术学院 | Method for treating rice milk water for brewing yellow rice wine |
| CN114682262B (en) * | 2020-12-29 | 2023-09-01 | 中国石油化工股份有限公司 | Hypochlorite decomposition catalyst |
| WO2022183513A1 (en) * | 2021-03-05 | 2022-09-09 | 万华化学集团股份有限公司 | Catalytic dechlorination process for brackish water at outlet of electrolytic cell |
| CN115010286A (en) * | 2021-03-05 | 2022-09-06 | 万华化学集团股份有限公司 | Catalytic dechlorination process for dilute brine at outlet of electrolytic cell |
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| CN1332892C (en) * | 2005-09-29 | 2007-08-22 | 江苏工业学院 | Normal temperature and normal pressure ClO2 catalyzed oxidation process of treating high concentration organic waste water |
| CN101559369B (en) * | 2009-05-21 | 2013-12-25 | 中国矿业大学(北京) | Supported catalyst for coal pyrolysis hydrogen production and preparation method thereof |
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