CN105236355A - Clean and environmental-protection bleaching powder production process - Google Patents
Clean and environmental-protection bleaching powder production process Download PDFInfo
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- CN105236355A CN105236355A CN201510621713.4A CN201510621713A CN105236355A CN 105236355 A CN105236355 A CN 105236355A CN 201510621713 A CN201510621713 A CN 201510621713A CN 105236355 A CN105236355 A CN 105236355A
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Abstract
The present invention discloses a clean and environmental-protection bleaching powder production process, which comprises: (1) carrying out a dry digestion reaction on quicklime to obtain slaked lime; (2) adding the slaked lime to a chlorination device, introducing chlorine gas into the chlorination device through a chlorine gas control system, and carrying out a chlorination reaction to obtain bleaching powder and dust-containing and chlorine-containing tail gas; and (3) introducing the dust-containing and chlorine-containing tail gas into a first-stage water washing tower to obtain a chlorinated tail gas alkaline washing solution, carrying out an absorption reaction on the alkaline washing solution as a second-stage absorption tower absorption solution and the chlorine gas in the tail gas to obtain clean water vapor and an absorption solution, discharging the obtained clean water vapor from an emptying pipe, and adopting the absorption solution as the water for lime digestion in the digestion system. According to the present invention, the digestion-waste gas treatment integrated pulse dust removing process is used to treat the produced dust waste steam so as to avoid the pipeline from being clogged by dust and the external discharge pollution; and the process has characteristics of no dust clogging, no three-waste discharge, and clean environmental protection.
Description
Technical field
The invention belongs to chemical industry manufacturing technology field, be specifically related to a kind of technique using waste water closed cycle clean environment firendly to produce chlorinated lime.
Background technology
Chlorinated lime is traditional one of SYNTHETIC OPTICAL WHITNER and disinfection sanitizer, is also the conventional products balancing chlorine in chemical industry for making chlorine and alkali industry.Chlorinated lime is easy to use, cheap; Production process technology is uncomplicated, less demanding to purity of chlorine gas feeding, have wide range of applications.
Chlorinated lime production technique is with lime and chlorine for raw material, and lime reacts with chlorine after digestion.And lime produces a large amount of water vapors containing dust in digestive process, when the water vapor that chlorination reaction process produces is discharged, take away again a small amount of unreacted chlorine.Therefore, be the most scabrous problem of this technique to the waste gas waste water produced in the removing of dust and tail gas absorption treating processes.
In chlorinated lime production process, the shortcoming that traditional production technique exists is: lime is in digestive process, the dust of slaked lime is large, jet of water absorption process weak effect, when being drawn out of system dust removing containing slaked lime dust steam, slaked lime, with good adherence of on pipeline and squirt pump inwall, causes line clogging and squirt pump encrustation block and lost efficacy, finally causes environmental pollution.And in water smoke absorption process, because quantity of circulating water makes assimilated efficiency reduce with the raising of temperature, therefore water demand is large, finally causes system uneven and external sewage effluent contaminate environment.In addition, vent gas treatment after chlorinated lime chlorination absorbs is the difficult point of this technique always, traditional technology mainly absorbs remaining chlorine in tail gas by the circulation of water in slaked lime, thus obtain sodium hypochlorite solution byproduct, but because chlorinated lime chlorination absorption process is an exothermic process, containing a large amount of high-temperature water vapors in tail gas, in the process of producing sodium hypochlorite solution byproduct, because of cannot heat transfer and make sodium hypochlorite solution cyclic absorption liquid temp too high and decompose in a large number, the sodium hypochlorite solution product of certified concentration finally cannot be obtained.Therefore, the sodium hypochlorite solution byproduct how reclaiming these lower concentrations is the difficult point of traditional technology always, and discharging of waste liquid finally can only be used as it as by most manufacturing enterprise.In addition, the maximum problem of chlorinated lime production technique is the safe handling problem of chlorine, and when many manufacturing enterprises are often because of accidental power failure, artificial start or stop valve causes not in time and serious emits chlorine accident.
In traditional chlorinated lime art production process, environmental pollution is serious, and a large amount of dust and waste water are arranged outward, in today that environment protection is more and more strict, adopts the chlorinated lime novel process of clean environment firendly, the social effect of own profound.
The information being disclosed in this background technology part is only intended to increase the understanding to general background of the present invention, and should not be regarded as admitting or imply in any form that this information structure has been prior art that persons skilled in the art are known.
Summary of the invention
The object of the invention is to improve chlorinated lime traditional processing technology, by the waste water after tail gas absorption, adopt closed cycle to enter system response, make non-wastewater discharge in production process, a kind of clean environment firendly novel process using waste water closed cycle to produce chlorinated lime is provided.
Technical scheme provided by the invention is:
Clean environment firendly produces a technique for chlorinated lime, comprises the following steps:
(1) first by unslaked lime after dry method digestion reaction, obtain slaked lime;
(2) again slaked lime is added in chlorinator, then in chlorinator, passes into chlorine by chlorine Controlling System and carry out chlorination reaction, obtain chlorinated lime and dust-laden, chloride tail gas;
(3) dust-laden, chloride tail gas are passed in one-stage water wash tower, obtain chlorinated exhaust alkaline detergent solution, then alkaline detergent solution is carried out absorption reaction as chlorine in secondary tail gas absorber absorption liquid and tail gas, obtain clean aqueous vapor and absorption liquid; The clean aqueous vapor obtained is discharged from blow-down pipe; Using absorption liquid as the lime slaking water in Digestive tract.
As preferably, described chlorine Controlling System comprises chlorinator, pneumavalve and magnetic valve, described pneumavalve is connected in the mode of interlocked control with magnetic valve, carry out control chlorine with pneumavalve at ordinary times and enter chlorinator, when having a power failure suddenly, magnetic valve can in seconds cut out, thus controls chlorine and can not enter chlorinator and react.
As preferably, described one-stage water wash tower and secondary tail gas absorber form a chlorination-de-dusting cycle treatment system.
As preferably, the workflow of described digestion-de-dusting cycle treatment system is as follows: chlorinated exhaust absorption liquid imports digestion millpond, uses, react, obtain slaked lime with quicklime slaking as digestion water; The dust produced in dry method digestive process, after the slaking carrying out slaked lime through slaking and dust removal integrated equipment and dedusting, clean aqueous vapor is discharged through vacuum fan, and the slaked lime powder that dedusting is got off is got back in ager and become slaked lime.
Compared with prior art, the present invention has following beneficial effect:
1. production technique of the present invention is in lime slaking process, introduces digestion and dust removal integrated theory, be located in same equipment, thus it is low to solve efficiency of dust collection, line clogging and the unbalanced difficult problem of sewage by digestion and dedusting.
2. production technique of the present invention solves the process problem of low-density bleaching liquid, infiltrate in digestion hot water by the sodium hypochlorite solution substep after supernatant process, enter in chlorination system and chlorinated lime finished product after the slaked lime mixture making the effective ingredient in sodium hypochlorite solution become solid-state, thus avoid the emission problem of sodium hypochlorite solution waste water.
3. production technique of the present invention can the generation of pre-anti-risk chlorine accident, valve and electronics tune is established to establish valve double insurance system by introducing two cover air pressure tune, run into when having a power failure suddenly, cannot under the state of initiatively start or stop valve at air pressure valve, electronics is adjusted and is established valve can automatic-closing valve, and that can avoid causing because of power failure suddenly emits chlorine accident.
4. production technique of the present invention has the feature without dust blocking, nothing " three wastes " discharge, clean environment firendly.
Accompanying drawing explanation
Fig. 1 is that the present invention uses waste water closed cycle to produce the clean environment firendly process flow sheet of chlorinated lime.
Fig. 2 is digestion-de-dusting cycle treatment system fundamental diagram.
Fig. 3 is chlorine Controlling System workflow diagram.
Embodiment
Below in conjunction with specific embodiment, elaboration detailed is further done to the present invention, but embodiments of the present invention are not limited to the scope that embodiment represents.These embodiments only for illustration of the present invention, but not for limiting the scope of the invention.In addition, after reading content of the present invention, those skilled in the art can do various amendment to the present invention, and these equivalent variations fall within appended claims limited range of the present invention equally.
embodiment 1: a kind of clean environment firendly produces the technique of chlorinated lime, comprises the following steps:
(1) first by unslaked lime after dry method digestion reaction, obtain slaked lime;
(2) again slaked lime is added in chlorinator, then in chlorinator, passes into chlorine by chlorine Controlling System and carry out chlorination reaction, obtain chlorinated lime and dust-laden, chloride tail gas; Described chlorine Controlling System comprises chlorinator, pneumavalve and magnetic valve, described pneumavalve is connected in the mode of interlocked control with magnetic valve, carry out control chlorine with pneumavalve at ordinary times and enter chlorinator, when having a power failure suddenly, magnetic valve can in seconds cut out, thus controls chlorine and can not enter chlorinator and react;
(3) dust-laden, chloride tail gas are passed in one-stage water wash tower, obtain chlorinated exhaust alkaline detergent solution, again alkaline detergent solution is carried out absorption reaction as chlorine in secondary tail gas absorber absorption liquid and tail gas, finally the clean aqueous vapor obtained is discharged from blow-down pipe; Gone by absorption liquid Digestive tract to make lime slaking water to use; Described one-stage water wash tower and secondary tail gas absorber form a chlorination-de-dusting cycle treatment system; The workflow of described digestion-de-dusting cycle treatment system is as follows: chlorinated exhaust absorption liquid imports digestion millpond, uses, react, obtain slaked lime with quicklime slaking as digestion water; The dust produced in dry method digestive process, after the slaking carrying out slaked lime through slaking and dust removal integrated equipment and dedusting, clean aqueous vapor is discharged through vacuum fan, and the slaked lime powder that dedusting is got off is got back in ager and become slaked lime.
Result of implementation is as follows:
Production technique of the present invention discharge of wastewater in chlorinated lime production process is 0 ton, and water of productive use consumption chlorinated lime product water consumption per ton from traditional technology is 10 tons and drops to present 0.5 ton.By 40000 tons/year of product scales, annual water-saving amount reaches 380000 tons, by 3.5 yuan/ton of water, can save water rate 1,330,000 yuan the whole year.
Without discarded dust discharge in production process, production environment reaches occupational health standard-required completely.
Because introducing chlorine interlock control system, it is 0 that annual accident chlorine leaks number of times.
The aforementioned description to concrete exemplary of the present invention is to illustrate and the object of illustration.These descriptions not want the present invention to be defined as disclosed precise forms, and obviously, according to above-mentioned instruction, can much change and change.The object selected exemplary embodiment and describe is to explain certain principles of the present invention and practical application thereof, thus those skilled in the art can be realized and utilize various different exemplary of the present invention and various different selection and change.Scope of the present invention is intended to limited by claims and equivalents thereof.
Claims (4)
1. clean environment firendly produces a technique for chlorinated lime, it is characterized in that, comprises the following steps:
(1) first by unslaked lime after dry method digestion reaction, obtain slaked lime;
(2) again slaked lime is added in chlorinator, then in chlorinator, passes into chlorine by chlorine Controlling System and carry out chlorination reaction, obtain chlorinated lime and dust-laden, chloride tail gas;
(3) dust-laden, chloride tail gas are passed in one-stage water wash tower, obtain chlorinated exhaust alkaline detergent solution, then alkaline detergent solution is carried out absorption reaction as chlorine in secondary tail gas absorber absorption liquid and tail gas, obtain clean aqueous vapor and absorption liquid; The clean aqueous vapor obtained is discharged from blow-down pipe; Using absorption liquid as the lime slaking water in Digestive tract.
2. clean environment firendly according to claim 1 produces the technique of chlorinated lime, it is characterized in that, described chlorine Controlling System comprises chlorinator, pneumavalve and magnetic valve, described pneumavalve is connected in the mode of interlocked control with magnetic valve, carry out control chlorine with pneumavalve at ordinary times and enter chlorinator, when having a power failure suddenly, magnetic valve can in seconds cut out, thus controls chlorine and can not enter chlorinator and react.
3. clean environment firendly according to claim 1 produces the technique of chlorinated lime, it is characterized in that, described one-stage water wash tower and secondary tail gas absorber form chlorination-de-dusting cycle treatment system.
4. clean environment firendly according to claim 3 produces the technique of chlorinated lime, it is characterized in that, the workflow of described chlorination-de-dusting cycle treatment system is as follows: chlorinated exhaust absorption liquid imports digestion millpond, uses as digestion water, react with quicklime slaking, obtain slaked lime; The dust produced in dry method digestive process, after the slaking carrying out slaked lime through slaking and dust removal integrated equipment and dedusting, clean aqueous vapor is discharged through vacuum fan, and the slaked lime powder that dedusting is got off is got back in ager becomes slaked lime product.
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| CN201510621713.4A CN105236355A (en) | 2015-09-25 | 2015-09-25 | Clean and environmental-protection bleaching powder production process |
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| CN201510621713.4A CN105236355A (en) | 2015-09-25 | 2015-09-25 | Clean and environmental-protection bleaching powder production process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105582761A (en) * | 2016-02-17 | 2016-05-18 | 常熟市宏宇钙化物有限公司 | Dust treatment device utilizing heat energy generated in preparation of calcium hydroxide from quick lime |
| CN109316904A (en) * | 2018-11-09 | 2019-02-12 | 成都蜀菱科技发展有限公司 | A kind of processing method of chlorine contained exhaust gas |
| CN110342466A (en) * | 2019-06-25 | 2019-10-18 | 扬州市海纳源科技服务有限责任公司 | A kind of production technology of bleaching powder |
| CN110872651A (en) * | 2018-09-04 | 2020-03-10 | 中国科学院过程工程研究所 | Method for removing chloride ions in chlorine-containing sulfuric acid solution by adopting fluidized bed electrode |
Citations (4)
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| CN1198403A (en) * | 1997-05-04 | 1998-11-11 | 王振文 | Technological process of calcium method producing bleaching powder extract |
| CN1198402A (en) * | 1997-05-04 | 1998-11-11 | 王振文 | Telchnological process of sodium method producing bleaching powder extract |
| CN101602489A (en) * | 2009-03-03 | 2009-12-16 | 王嘉兴 | The method for preparing chlorinated lime and Calcium Chloride Powder Anhydrous with hydrated lime to treat chlorine water |
| CN203582470U (en) * | 2013-08-30 | 2014-05-07 | 天津市凯丰化工有限公司 | Production system of calcium hypochlorite |
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2015
- 2015-09-25 CN CN201510621713.4A patent/CN105236355A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1198403A (en) * | 1997-05-04 | 1998-11-11 | 王振文 | Technological process of calcium method producing bleaching powder extract |
| CN1198402A (en) * | 1997-05-04 | 1998-11-11 | 王振文 | Telchnological process of sodium method producing bleaching powder extract |
| CN101602489A (en) * | 2009-03-03 | 2009-12-16 | 王嘉兴 | The method for preparing chlorinated lime and Calcium Chloride Powder Anhydrous with hydrated lime to treat chlorine water |
| CN203582470U (en) * | 2013-08-30 | 2014-05-07 | 天津市凯丰化工有限公司 | Production system of calcium hypochlorite |
Non-Patent Citations (1)
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| 崔英德等: "《漂白剂及其应用》", 28 February 1999, 中山大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105582761A (en) * | 2016-02-17 | 2016-05-18 | 常熟市宏宇钙化物有限公司 | Dust treatment device utilizing heat energy generated in preparation of calcium hydroxide from quick lime |
| CN110872651A (en) * | 2018-09-04 | 2020-03-10 | 中国科学院过程工程研究所 | Method for removing chloride ions in chlorine-containing sulfuric acid solution by adopting fluidized bed electrode |
| CN109316904A (en) * | 2018-11-09 | 2019-02-12 | 成都蜀菱科技发展有限公司 | A kind of processing method of chlorine contained exhaust gas |
| CN110342466A (en) * | 2019-06-25 | 2019-10-18 | 扬州市海纳源科技服务有限责任公司 | A kind of production technology of bleaching powder |
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