CN101698643A - Boiling bleacher used in production process of sodium benzoate and operating process - Google Patents
Boiling bleacher used in production process of sodium benzoate and operating process Download PDFInfo
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- CN101698643A CN101698643A CN 200910070991 CN200910070991A CN101698643A CN 101698643 A CN101698643 A CN 101698643A CN 200910070991 CN200910070991 CN 200910070991 CN 200910070991 A CN200910070991 A CN 200910070991A CN 101698643 A CN101698643 A CN 101698643A
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Abstract
The invention relates to a boiling bleacher used in production process of sodium benzoate and an operating process. An upper end of the bleacher is connected with a neutralization tank, an active carbon storage tank, a compressed air tank, a vacuum tank and a filtering machine through valves and pipelines; and simultaneously, the upper end of the bleacher is provided with a steam inlet pipe and a drain pipe. Pressure difference is utilized to suck sodium benzoate liquid generated in the neutralization tank and active carbon in the active carbon storage tank into the bleacher; the liquid is bubbled and boiled in the bleacher under the impact of steam, so that the liquid and the active carbon are fully mixed evenly; and the liquid is discharged into the filtering machine from the bleacher by compressed air. Through the creation, the conventional flow of bleaching the sodium benzoate liquid is changed, the product quality stability is improved, the operating environment is improved, the active carbon is saved, a large number of expenses are saved for Tianjin Dongda Chemical Co., Ltd., the social benefit is brought to the society, the pollution is lightened, the raw materials are saved, and the environment is protected.
Description
Technical field
The invention belongs to field of chemical technology, particularly relate to boiling type bleacher and operating procedure that the Sodium Benzoate production process is used.
Background technology
Sodium Benzoate claims that again sodium benzoate is a kind of food preservatives of efficient economy, and along with The development in society and economy, the demand of food service industry para Toluic Acid sodium is increasing on the domestic and international market.The Sodium Benzoate production technique generally comprises: neutralization, decolouring, filter, dry and pack 5 basic operation units.Neutralization reaction takes place and generates Sodium Benzoate in phenylformic acid and liquid caustic soda (sodium hydroxide), owing to contain partial impurities in benzene feedstock formic acid and the liquid caustic soda, need to utilize gac that the thick matter Sodium Benzoate that generates is decoloured in process of production, improve the purity and the whiteness of Sodium Benzoate, reach food grade Sodium Benzoate standard, the gac of absorption behind the impurity separated by filtering operation, and Sodium Benzoate solution is behind super-dry, packaging process, and it is for sale to become product.
Bleaching process is a very important step in Sodium Benzoate production, can adsorb impurity fully for guaranteeing the gac that adds, and the amount of gac wants sufficient on the one hand, will guarantee also that on the other hand gac mixes in the liquid material.Operating method is generally in traditional decoloration process, and the neutralization reaction liquid material that will contain Sodium Benzoate is transported in the bleacher, manually adds quantitative gac, utilizes mechanical stirring device that mixture is stirred then.As shown in Figure 1.This operating method labour intensity for operator is big, and active carbon powder flies away easily in the workshop, operating environment is caused very big pollution, and the not high activated carbon dosage that causes of churned mechanically efficient strengthens, product quality stability is not high yet.
Summary of the invention
Our Dongda Chemical Industry Co., Ltd., Tianjin City operates according to concrete actual production, research and development through autonomous innovation, provide in a kind of new Sodium Benzoate production process, system and equipment to the decolouring of neutralizer material, liquid material after the neutralization is decoloured in this equipment, realize automatic feed and discharging, improved the mixing effect of gac.
For achieving the above object, the technical scheme of the present invention's proposition is:
The boiling type bleacher that Sodium Benzoate production process of the present invention is used is to be connected with neutralization tank, gac storage tank, pneumatics jar, vacuum tank and filter in the tank body upper end through valve and pipeline; Be provided with steam inlet tube and evacuated tube in the tank body upper end simultaneously.
Concrete mode of connection is: the neutralization tank pipeline connects the material inlet pipe, gac storage tank pipeline connects the gac inlet pipe, pneumatics jar pipeline connects the pressurized air inlet pipe, the vacuum tank pipeline connects vacuum-pumping tube, the filter pipeline connects material and goes out pipe, and steam inlet tube connects exhaust steam trap provides exhaust steam or Boiler Steam.
The operating procedure of the boiling type bleacher that Sodium Benzoate production process of the present invention is used, step is: open vacuum valve earlier, open fluid feed valve and gac valve again, after the boiling type bleacher vacuumized, Sodium Benzoate liquid material and the gac in the gac storage tank that generates in the neutralization tank sucked in the boiling type bleacher; Close vacuum valve, fluid feed valve and gac valve, open exhaust-valve and steam valve, with pressure is that 0.2～0.4MPa, temperature are 110～140 ℃ steam feeding boiling type bleacher, the liquid material produces the bubbling boiling phenomenon in the boiling type bleacher, make the sufficient mixing of material and gac, high-temperature steam kept bleaching time about 25～50 minutes, steam off valve and exhaust-valve after decolouring is finished; Open bleeder valve and compressed air valve,, the liquid material is discharged bleacher in filter charging into pressurized air in the bleacher.
Of the present invention is to utilize pressure difference that Sodium Benzoate liquid material and the gac in the gac storage tank that generates in the neutralization tank sucked in the bleacher; Utilize the shock action of steam, the liquid material produces the bubbling boiling phenomenon in bleacher, makes the sufficient mixing of material and gac; Utilize pressurized air that the liquid material is discharged bleacher in filter.
Improve the input and output material mode and utilized steam bubble to improve liquid material and gac mixing effect.
By above innovation and creation; changed former Sodium Benzoate liquid material decolouring flow process; improved constant product quality; improved operating environment, saved activated carbon dosage, for our Dongda Chemical Industry Co., Ltd., Tianjin City has saved no small expense; brought social benefit for society simultaneously; reduce pollution, saved raw material, protected environment.
Description of drawings
Fig. 1: liquid material bleacher in the former Sodium Benzoate production process;
Fig. 2: boiling type bleacher in the Sodium Benzoate production process of the present invention;
Fig. 3: boiling type bleacher Link Port synoptic diagram.
Embodiment
The present invention is described in further detail with embodiment with reference to the accompanying drawings below:
Adopt liquid material boiling type bleacher in the Sodium Benzoate production process shown in accompanying drawing 2 and the accompanying drawing 3, be connected with neutralization tank, gac storage tank, pneumatics jar, vacuum tank and filter through valve and pipeline in the tank body upper end; Be provided with steam inlet tube and evacuated tube in the tank body upper end simultaneously.The neutralization tank pipeline connects the material inlet pipe, gac storage tank pipeline connects the gac inlet pipe, and pneumatics jar pipeline connects the pressurized air inlet pipe, and the vacuum tank pipeline connects vacuum-pumping tube, the filter pipeline connects material and goes out pipe, and steam inlet tube connects exhaust steam trap provides exhaust steam or Boiler Steam.
The operating procedure step is: open vacuum valve earlier, open fluid feed valve and gac valve again, after the boiling type bleacher is vacuumized, Sodium Benzoate liquid material and the gac in the gac storage tank that generates in the neutralization tank sucked in the boiling type bleacher; Close vacuum valve, fluid feed valve and gac valve, open exhaust-valve and steam valve, with pressure is that 0.2～0.4MPa, temperature are 110～140 ℃ steam feeding boiling type bleacher, the liquid material produces the bubbling boiling phenomenon in the boiling type bleacher, make the sufficient mixing of material and gac, high-temperature steam kept bleaching time about 25～50 minutes, steam off valve and exhaust-valve after decolouring is finished; Open bleeder valve and compressed air valve,, the liquid material is discharged bleacher in filter charging into pressurized air in the bleacher.
System comprises neutralization tank, gac storage tank, pneumatics jar, vacuum tank equipment and filter; The boiling type bleacher is set between neutralization tank and filter; The boiling type bleacher is provided with material inlet pipe, gac inlet pipe, pressurized air inlet pipe, steam inlet tube, material and goes out pipe, vacuum-pumping tube and evacuated tube, and steam inlet connects exhaust steam trap provides exhaust steam or Boiler Steam.
Concrete data are the boiling type bleacher: ￠ 1300mm, and H=1600mm, data are illustrative, and not exclusive, all are included in the scope of the present invention as long as reach the dimensional data of the toluene preheater of technique effect of the present invention.
Embodiment 1: open vacuum valve earlier, open fluid feed valve and gac valve again; After bleacher vacuumized, utilize pressure difference that Sodium Benzoate liquid material and the gac in the gac storage tank that generates in the neutralization tank sucked in the bleacher.Close vacuum valve, fluid feed valve and gac valve.Open exhaust-valve and steam valve, with pressure is that 0.2MPa, temperature are 110 ℃ steam feeding bleacher, utilize the shock action of steam, the liquid material produces the bubbling boiling phenomenon in bleacher, make the sufficient mixing of material and gac, high-temperature steam has kept liquid material temperature, the best decoloration performance of performance gac.About 50 minutes of bleaching time, steam off valve and exhaust-valve after decolouring is finished.Open bleeder valve and compressed air valve,, utilize pressurized air that the liquid material is discharged bleacher in filter charging into pressurized air in the bleacher.
Embodiment 2: the vapor pressure among the embodiment 1 is that 0.4MPa, temperature are that 140 ℃ steam is blown into bleacher, utilize the shock action of steam, the liquid material produces the bubbling boiling phenomenon in bleacher, make the sufficient mixing of material and gac, high-temperature steam has kept liquid material temperature, the best decoloration performance of performance gac.Decolour after 25 minutes, steam off valve and exhaust-valve are opened bleeder valve and compressed air valve, to charging into pressurized air in the bleacher, utilize pressurized air that the liquid material is discharged bleacher in filter.
Embodiment 3: the vapor pressure among the embodiment 1 is that 0.3MPa, temperature are that 120 ℃ steam is blown into bleacher, utilize the shock action of steam, the liquid material produces the bubbling boiling phenomenon in bleacher, make the sufficient mixing of material and gac, high-temperature steam has kept liquid material temperature, the best decoloration performance of performance gac.Decolour after 40 minutes, steam off valve and exhaust-valve are opened bleeder valve and compressed air valve, to charging into pressurized air in the bleacher, utilize pressurized air that the liquid material is discharged bleacher in filter.
Embodiments of the invention have all reached effect of the present invention:
The qualification rate of Sodium Benzoate brings up to present 99.9% by 97.1% of original technology.
Save gac: 0.5kg for every jar, every day the neutralization tank number: 60 jars,
Saved gac in 1 year: 0.0005 ton * 60 jars/day * 360 days/year=10.8 tons/year;
Gac price: 6500 yuan/ton;
Saved in 1 year: 0.65 ten thousand yuan/ton * 10.8 tons/year=7.02 ten thousand yuan/year.
Claims (3)
1. the boiling type bleacher that the Sodium Benzoate production process is used is characterized in that being connected with neutralization tank, gac storage tank, pneumatics jar, vacuum tank and filter in the tank body upper end through valve and pipeline; Be provided with steam inlet tube and evacuated tube in the tank body upper end simultaneously.
2. the boiling type bleacher that Sodium Benzoate production process as claimed in claim 1 is used, it is characterized in that the neutralization tank pipeline connects the material inlet pipe, gac storage tank pipeline connects the gac inlet pipe, pneumatics jar pipeline connects the pressurized air inlet pipe, the vacuum tank pipeline connects vacuum-pumping tube, the filter pipeline connects material and goes out pipe, and steam inlet tube connects exhaust steam trap provides exhaust steam or Boiler Steam.
3. the operating procedure of the boiling type bleacher that uses of claim 1 or 2 described Sodium Benzoate production processes, it is characterized in that opening earlier vacuum valve, open fluid feed valve and gac valve again, after the boiling type bleacher vacuumized, Sodium Benzoate liquid material and the gac in the gac storage tank that generates in the neutralization tank sucked in the boiling type bleacher; Close vacuum valve, fluid feed valve and gac valve, open exhaust-valve and steam valve, with pressure is that 0.2～0.4MPa, temperature are 110～140 ℃ steam feeding boiling type bleacher, the liquid material produces the bubbling boiling phenomenon in the boiling type bleacher, make the sufficient mixing of material and gac, high-temperature steam kept bleaching time about 25～50 minutes, steam off valve and exhaust-valve after decolouring is finished; Open bleeder valve and compressed air valve,, the liquid material is discharged bleacher in filter charging into pressurized air in the bleacher.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910070991 CN101698643B (en) | 2009-10-27 | 2009-10-27 | Boiling bleacher used in production process of sodium benzoate and operating process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910070991 CN101698643B (en) | 2009-10-27 | 2009-10-27 | Boiling bleacher used in production process of sodium benzoate and operating process |
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| CN101698643A true CN101698643A (en) | 2010-04-28 |
| CN101698643B CN101698643B (en) | 2013-03-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102961984A (en) * | 2012-12-06 | 2013-03-13 | 天津开发区渤海东大药业有限公司 | Dissolution tank for drug level benzoic acid production and operation method |
| CN103834471A (en) * | 2012-11-26 | 2014-06-04 | 北京中天金谷粮油工程技术有限公司 | Multifunctional efficient edible oil decolorizing pot |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100463895C (en) * | 2006-07-27 | 2009-02-25 | 天津市东大化工有限公司 | Granular sodium benzoate and its production process |
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2009
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834471A (en) * | 2012-11-26 | 2014-06-04 | 北京中天金谷粮油工程技术有限公司 | Multifunctional efficient edible oil decolorizing pot |
| CN102961984A (en) * | 2012-12-06 | 2013-03-13 | 天津开发区渤海东大药业有限公司 | Dissolution tank for drug level benzoic acid production and operation method |
| CN102961984B (en) * | 2012-12-06 | 2015-04-15 | 天津开发区渤海东大药业有限公司 | Dissolution tank for drug level benzoic acid production and operation method |
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| Publication number | Publication date |
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| CN101698643B (en) | 2013-03-20 |
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Owner name: TIANJIN DONGDA CHEMICAL GROUP CO., LTD. Free format text: FORMER NAME: DONGDA CHEMICAL INDUSTRY CO., LTD., TIANJIN CITY |
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Address after: 300455 Tianjin city Tanggu District No. 728 Kaiweilu Patentee after: Tianjin Dongda Chemical Co., Ltd Address before: 300452 Tianjin city Tanggu District No. 728 Kaiweilu Patentee before: Dongda Chemical Industry Co., Ltd., Tianjin City |