CN105197892A - Novel production process of sodium hypochlorite - Google Patents
Novel production process of sodium hypochlorite Download PDFInfo
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- CN105197892A CN105197892A CN201510604830.XA CN201510604830A CN105197892A CN 105197892 A CN105197892 A CN 105197892A CN 201510604830 A CN201510604830 A CN 201510604830A CN 105197892 A CN105197892 A CN 105197892A
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Abstract
The invention discloses a novel production process of sodium hypochlorite. The problem that in a circulating process, analysis staff ceaselessly detect the concentration of sodium hypochlorite till sodium hypochlorite in a sodium hypochlorite circulating tank is qualified is solved. According to the technical scheme, sodium hydroxide with the concentration of 32% is diluted by water into sodium hydroxide with the concentration of 20%, two orp detecting devices are arranged and each comprise a noble electrode and a reference electrode, the noble electrode of one orp detecting device is introduced into a sodium hydroxide solution in front of a falling film absorption tower, the reference electrode of the orp detecting device is introduced into reaction products in the falling film absorption tower, the noble electrode of the other orp detecting device is introduced into a sodium hydroxide solution in front of a filler absorption tower, the reference electrode of the orp detecting device is introduced into the reaction products in the falling film absorption tower, and the noble electrodes and the reference electrodes detect the detected volume through a flow speed reduction device. The work intensity of the staff is lowered, the yield is increased, and the quality stability of products is improved.
Description
Technical field
The present invention relates to clorox production field, in particular, it relates to a kind of production technique of novel clorox.
Background technology
Clorox is a kind of high-efficient oxidant and chlorine-containing disinfectant, is used for papermaking, weaving, light industry etc., has the effect of bleaching, sterilization, sterilization as SYNTHETIC OPTICAL WHITNER, oxygenant and water scavengine agent.Its oxidation capacity is strong, it is fast, effective to act on, and its effect is very extensive.Its preparation method mainly contains saline electrolysis, chlorine and sodium hydroxide contact reacts.
Existing production process of sodium hypochlorite is that interrupter method is produced.Main technique is a sodium hydroxide header tank, a packed absorber and a clorox circulation groove, sodium hydroxide header tank is made into the sodium hydroxide of 20% concentration, then packed absorber is flow to, with recycle pump, sodium hydroxide solution is played circulation between packed absorber and clorox circulation groove, chlorine is led at packed absorber, in working cycle, analyze the concentration that employee does not stop to detect clorox, until the clorox inside clorox circulation groove is qualified.Salable product are delivered to finished product storage tank, then carries out next one circulation, do next groove.Be characterized in that manipulation strength is high, quality is unstable, and the flow velocity due to detected solution in the middle of testing process is very fast, can not accomplish stable Real-Time Monitoring.
Summary of the invention
According to the deficiencies in the prior art, the invention provides a kind ofly can increase clorox output and reduce operative's intensity and can realize the production technique of a kind of novel clorox stablizing Real-Time Monitoring.
For achieving the above object, the invention provides following technical scheme: the sodium hydroxide of 32% concentration is diluted with water to the sodium hydroxide of 20% concentration by a.,
B. by dilution after sodium hydroxide solution enter water cooler cooling, condensed product is passed into film-falling absorption tower, in film-falling absorption tower, passes into chlorine reaction, temperature of reaction is 10 ~ 30 DEG C, obtain reaction product available chlorine 7% ~ 8.5% chlorine bleach liquor,
C. chlorine bleach liquor cooled through supercooler, condensed product is passed into packed absorber, in packed absorber, adds chlorine, temperature of reaction is 10 ~ 30 DEG C, obtain reaction product available chlorine 9% ~ 10.5% chlorine bleach liquor,
D. reacted chlorine bleach liquor is entered water cooler cooling, passes in finished product storage tank,
Also comprise and two place orp proofing units are set, described orp proofing unit comprises noble electrode and reference electrode, wherein the noble electrode of a place orp proofing unit passes into the sodium hydroxide solution before film-falling absorption tower, the reference electrode of this orp proofing unit passes in the reacted product of film-falling absorption tower, another noble electrode locating orp proofing unit passes into the sodium hydroxide solution before packed absorber, the reference electrode of this orp proofing unit passes in the reacted product of film-falling absorption tower, described noble electrode and reference electrode all detect tested capacity by flow deceleration device.
According to design of the present invention, described flow deceleration device comprises flow reduction box, described flow reduction box is as in detected solution liquid level, described noble electrode or reference electrode stretch into detected solution from the upper end of flow reduction box and detect, described in described noble electrode or reference electrode, the bottom of flow reduction box has the flowing water import mutual with detected solution, and the sidewall of described flow reduction box is provided with water outlet higher than detected solution liquid level place.
According to design of the present invention, the import of described flow reduction box flowing water is provided with water stream board.
According to design of the present invention, the reaction end gas of described film-falling absorption tower and packed absorber is sent into tail gas and is gone in accident tower.
According to design of the present invention, described noble electrode is platinum electrode.
According to design of the present invention, described reference electrode is mercurous chloride electrode or silver-silver chloride electrode.
Beneficial effect of the present invention is, this equipment for producing sodium hypochlorite is that continuous processing is produced, and product clorox is by on-line detector on-line monitoring, not Water demand work real-time analysis monitoring.Decrease employee work intensity, improve output, improve the quality stability of product, and be provided with the speed that flow deceleration device can realize slowing down its liquid-flow under flow velocity faster situation, accomplish Real-Time Monitoring, improve the accuracy of detection.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of a kind of novel clorox technique of the present invention;
Fig. 2 is the schematic diagram of the flow deceleration device of a kind of novel clorox technique of the present invention;
Fig. 3 is the another kind of schematic diagram of the flow deceleration device of a kind of novel clorox technique of the present invention.
Description of reference numerals: 1, flow reduction box; 2, flowing water import; 3, water outlet; 4, water stream board; 5, electrode.
Embodiment
A production technique for novel clorox, comprises the following steps,
A. the sodium hydroxide of 32% concentration is diluted with water to the sodium hydroxide of 20% concentration,
B. by dilution after sodium hydroxide solution enter water cooler cooling, condensed product is passed into film-falling absorption tower, in film-falling absorption tower, passes into chlorine reaction, temperature of reaction is 10 ~ 30 DEG C, obtain reaction product available chlorine 7% ~ 8.5% chlorine bleach liquor,
C. chlorine bleach liquor cooled through supercooler, condensed product is passed into packed absorber, in packed absorber, adds chlorine, temperature of reaction is 10 ~ 30 DEG C, obtain reaction product available chlorine 9% ~ 10.5% chlorine bleach liquor,
D. reacted chlorine bleach liquor is entered water cooler cooling, passes in finished product storage tank,
Also comprise and two place orp proofing units are set, described orp proofing unit comprises noble electrode and reference electrode, wherein the noble electrode of a place orp proofing unit passes into the sodium hydroxide solution before film-falling absorption tower, the reference electrode of this orp proofing unit passes in the reacted product of film-falling absorption tower, another noble electrode locating orp proofing unit passes into the sodium hydroxide solution before packed absorber, and the reference electrode of this orp proofing unit passes in the reacted product of film-falling absorption tower.The reaction end gas of film-falling absorption tower and packed absorber is sent into tail gas and is gone in accident tower.Noble electrode is that to state reference electrode be mercurous chloride electrode or silver-silver chloride electrode to platinum electrode.Noble electrode and reference electrode all detect tested capacity by flow deceleration device.Flow deceleration device comprises flow reduction box 1, flow reduction box 1 is as in detected solution liquid level, but not by the complete submergence of detected solution, noble electrode or reference electrode stretch into detected solution from the upper end of flow reduction box 1 and detect, described in described noble electrode or reference electrode, the bottom of flow reduction box 1 has the flowing water import 2 mutual with detected solution, the sidewall of flow reduction box 1 is provided with water outlet 3 higher than detected solution liquid level place, and flow reduction box 1 flowing water import 2 is provided with water stream board 4, electrode 5 wherein can be reference electrode or noble electrode.
With reference to accompanying drawing 2, as embodiment one, the direction of the vergence direction solution flowing of water stream board 4 is obliquely installed, further can slow down the rate of interaction of solution in flow reduction box 1 and extraneous detected solution like this, when water stream board 4 tilt angle alpha≤30 °, detected solution current are laminar flow, reynolds number Re is 1697 ~ 1800, the tolerance range applying this scheme is 82%, as embodiment two, the direction of the vergence direction solution flowing of water stream board 4 is obliquely installed, when water stream board 4 angle of inclination is greater than 30 ° of < α≤90 °, detected solution current are transition state, reynolds number Re is 2675 ~ 2730, the tolerance range applying this scheme is 78%.
With reference to accompanying drawing 3, as embodiment three, water stream board 4 is obliquely installed towards solution flow direction, when the flow rate of solution is when low, can promote the rate of exchange with extraneous detected solution in certain reduction box in this way.Be provided with the speed that flow deceleration device can realize slowing down its liquid-flow under flow velocity faster situation, accomplish Real-Time Monitoring, improve the accuracy of detection.In the middle of the present embodiment, detected solution is laminar flow, and reynolds number Re is 1443 ~ 1537, and the tolerance range applying this scheme is 88.3%.
If do not adopt flow deceleration device, be the concentration directly measuring detected solution, detected solution current are rapid layer, and reynolds number Re is 4675 ~ 4730, and the tolerance range applying this scheme is 68%.
The essence of redox reaction is the transfer of electronics.It is stronger that material connects nucleophobic tendency its oxidisability larger, this material i.e. strong oxidizer.Providing the larger material of electronics tendency is on the contrary exactly strong reductant, the power of redox agent can compare by measuring its size accepting (or providing) electronics tendency, and the potential difference measuring electrode and the reference electrode be made up of redox couple can be learnt.In clorox, chlorion has strong oxidizing property, and available chlorine content is higher, and its oxidisability will be stronger, and accepting electronic capability also can be stronger, and the potential difference therefore recorded by ORP just can draw the content of clorox available chlorine.In actual production, also strictly should control the temperature of absorption liquid, temperature raises, and the decomposition rate of chlorine bleach liquor is accelerated, and temperature declines greatly higher than its available chlorine content when 30 DEG C.Chlorine bleach liquor is suitable for storing below 10-30 DEG C.Due to present method describe be intermediate control analysis, do not consider the content of iron, arsenic and heavy metal at this.
This equipment for producing sodium hypochlorite is that continuous processing is produced, product clorox is by on-line detector on-line monitoring, Water demand work real-time analysis monitoring is not when being provided with this equipment, only only have 68% ~ 75% by the accuracy of personal monitoring, the accuracy of more than 85% can be reached by this Real-Time Monitoring.Decrease employee work intensity; improve output; facts have proved from 30,000 in the past ton and bring up to 100,000 tons; and improve product quality stability the above be only the preferred embodiment of the present invention; protection scope of the present invention be not only confined to above-described embodiment, all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a production technique for novel clorox, is characterized in that, comprises the following steps,
A. the sodium hydroxide of 32% concentration is diluted with water to the sodium hydroxide of 20% concentration,
B. by dilution after sodium hydroxide solution enter water cooler cooling, condensed product is passed into film-falling absorption tower, in film-falling absorption tower, passes into chlorine reaction, temperature of reaction is 10 ~ 30 DEG C, obtain reaction product available chlorine 7% ~ 8.5% chlorine bleach liquor,
C. chlorine bleach liquor cooled through supercooler, condensed product is passed into packed absorber, in packed absorber, adds chlorine, temperature of reaction is 10 ~ 30 DEG C, obtain reaction product available chlorine 9% ~ 10.5% chlorine bleach liquor,
D. reacted chlorine bleach liquor is entered water cooler cooling, passes in finished product storage tank,
Also comprise and two place orp proofing units are set, described orp proofing unit comprises noble electrode and reference electrode, wherein the noble electrode of a place orp proofing unit passes into the sodium hydroxide solution before film-falling absorption tower, the reference electrode of this orp proofing unit passes in the reacted product of film-falling absorption tower, another noble electrode locating orp proofing unit passes into the sodium hydroxide solution before packed absorber, the reference electrode of this orp proofing unit passes in the reacted product of film-falling absorption tower, described noble electrode and reference electrode all detect tested capacity by flow deceleration device.
2. the production technique of a kind of novel clorox according to claim 1, it is characterized in that, described flow deceleration device comprises flow reduction box, described flow reduction box is as in detected solution liquid level, described noble electrode or reference electrode stretch into detected solution from the upper end of flow reduction box and detect, the bottom of described flow reduction box has the flowing water import mutual with detected solution, and the sidewall of described flow reduction box is provided with water outlet higher than detected solution liquid level place.
3. the production technique of a kind of novel clorox according to claim 2, is characterized in that, the import of described flow reduction box flowing water is provided with water stream board.
4. the production technique of a kind of novel clorox according to claim 1, is characterized in that, the reaction end gas of described film-falling absorption tower and packed absorber is sent into tail gas and gone in accident tower.
5. the production technique of a kind of novel clorox according to claim 1, is characterized in that, described noble electrode is platinum electrode.
6. the production technique of a kind of novel clorox according to claim 1, is characterized in that, described reference electrode is mercurous chloride electrode or silver-silver chloride electrode.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105833703A (en) * | 2016-05-10 | 2016-08-10 | 浙江钛合工程技术有限公司 | Process for recovery of sodium chloride electrolysis industrial exhaust |
| CN106115625A (en) * | 2016-07-04 | 2016-11-16 | 宁波镇洋化工发展有限公司 | A kind of method preparing sodium hypochlorite |
| CN109133010A (en) * | 2018-11-09 | 2019-01-04 | 杭州电化集团有限公司 | A kind of production method for sodium hypochlorite of paddling |
| CN110255504A (en) * | 2019-07-10 | 2019-09-20 | 杭州中昊科技有限公司 | The system and technique of tower continuity method production sodium hypochlorite |
| CN111792625A (en) * | 2020-08-26 | 2020-10-20 | 河北泽世康环保科技有限公司 | Method for producing sodium hypochlorite |
| CN115196600A (en) * | 2021-04-10 | 2022-10-18 | 惠州科创美环保技术有限公司 | Novel sodium hypochlorite production process |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105833703A (en) * | 2016-05-10 | 2016-08-10 | 浙江钛合工程技术有限公司 | Process for recovery of sodium chloride electrolysis industrial exhaust |
| CN106115625A (en) * | 2016-07-04 | 2016-11-16 | 宁波镇洋化工发展有限公司 | A kind of method preparing sodium hypochlorite |
| CN106115625B (en) * | 2016-07-04 | 2019-01-29 | 宁波镇洋化工发展有限公司 | A method of preparing sodium hypochlorite |
| CN109133010A (en) * | 2018-11-09 | 2019-01-04 | 杭州电化集团有限公司 | A kind of production method for sodium hypochlorite of paddling |
| CN110255504A (en) * | 2019-07-10 | 2019-09-20 | 杭州中昊科技有限公司 | The system and technique of tower continuity method production sodium hypochlorite |
| CN111792625A (en) * | 2020-08-26 | 2020-10-20 | 河北泽世康环保科技有限公司 | Method for producing sodium hypochlorite |
| CN111792625B (en) * | 2020-08-26 | 2023-04-28 | 河北泽世康环保科技有限公司 | Method for producing sodium hypochlorite |
| CN115196600A (en) * | 2021-04-10 | 2022-10-18 | 惠州科创美环保技术有限公司 | Novel sodium hypochlorite production process |
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