CN203079693U - Reaction device for preparing phosphoric acid - Google Patents
Reaction device for preparing phosphoric acid Download PDFInfo
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- CN203079693U CN203079693U CN 201320034500 CN201320034500U CN203079693U CN 203079693 U CN203079693 U CN 203079693U CN 201320034500 CN201320034500 CN 201320034500 CN 201320034500 U CN201320034500 U CN 201320034500U CN 203079693 U CN203079693 U CN 203079693U
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Abstract
The utility model provides a reaction device for preparing phosphoric acid. The reaction device comprises a high-position reaction groove (1), an extraction groove (2) and a fluosilicic acid generation device, wherein the high-position reaction groove (1) is used for reaction of phosphoric ore pulp and fluosilicic acid, the extraction groove (2) is connected with the extraction groove (2) and is used for reaction of the phosphoric ore pulp, dilute sulfuric acid and concentrated sulfuric acid, the fluosilicic acid generation device is connected with the extraction groove (2), is used for collecting fluosilicic acid prepared from fluorine and is communicated with the high-position reaction groove (1), the fluorine generated by the extraction groove (2) is recycled for preparing the fluosilicic acid, and the prepared fluosilicic acid is conveyed to the high-position reaction groove (1) so as to replace a part of sulfuric acid and react with the phosphoric ore pulp for preparing the phosphoric acid; and as only a part of sulfuric acid is used, the pollution of fluorine to environments is avoided, and the production cost of the phosphoric acid is reduced.
Description
Technical field
The utility model relates to a kind of reaction unit, especially a kind of reaction unit that is used to produce phosphoric acid.
Background technology
At present, industrial phosphoric acid is divided into thermal phosphoric acid and phosphoric acid by wet process two big classes, and thermal phosphoric acid mainly is that Rock Phosphate (72Min BPL) is reduced into yellow phosphorus with coke, then yellow phosphorus burning is become Vanadium Pentoxide in FLAKES, absorbs through water to generate phosphoric acid again.Phosphoric acid by wet process mainly is to utilize sulfuric acid and phosphorus ore reaction to make.Thermal phosphoric acid owing to the energy consumption height, pollute reasons such as big, have progressively by the displaced trend of phosphoric acid by wet process.
In the Wet-process Phosphoric Acid Production process, all can be accompanied by the generation of fluorine gas, if the fluorine gas of these by-products is not used, not only can causes a large amount of fluorine resources to be wasted, but also need reinvestment equipment to carry out waste water treatment.In the Wet-process Phosphoric Acid Production process, fluorine mainly is that volatilization forms HF and SiF
4, in absorption process, form silicate fluoride solution then.At present, domestic utilization for fluorine resource in the phosphorus ore mainly is to generate silicofluoric acid earlier, and then preparation silicofluoride, fluorochemical etc., but this method has the big shortcoming of facility investment.On the other hand, in the process of utilizing the sulfuric acid decomposing phosphate rock, need to consume a large amount of sulfuric acid, general 1 ton of Rock Phosphate (72Min BPL) reaction is produced phosphoric acid and need be consumed 0.85 ton of sulfuric acid.
Summary of the invention
In order to overcome above-mentioned technical disadvantages, the purpose of this utility model provides a kind of reaction unit that is used to produce phosphoric acid by wet process, has therefore reduced vitriolic consumption in the production process of phosphoric acid, has recycled the fluorine resource in the phosphorus ore simultaneously.
For achieving the above object, the technical scheme that the utility model is taked is: include and be used for phosphorus ore slurry and link to each other with the high-order reactive tank of silicofluoric acid reaction, with high-order reactive tank and be used for phosphorus ore and starch and link to each other with the extraction tank of light phosphoric acid and strong sulfuric acid response, with extraction tank and be used to collect the silicofluoric acid generating unit that fluorine gas is produced silicofluoric acid, the silicofluoric acid generating unit is set to be communicated with high-order reactive tank.
After Rock Phosphate (72Min BPL) is prepared into phosphorus ore slurry, at first in high-order reactive tank, react with silicofluoric acid, pour into again in the extraction tank and react with light phosphoric acid, the vitriol oil, obtain phosphoric acid more simultaneously, obtain fluorine gas, fluorine gas generates silicofluoric acid after entering the silicofluoric acid generating unit, and silicofluoric acid is transported in the high-order reactive tank and produces phosphoric acid with the reaction of phosphorus ore slurry.Owing to designed the silicofluoric acid generating unit, the fluorine gas recycling to extraction tank produces substitutes part of sulfuric acid with silicofluoric acid simultaneously, no longer all uses sulfuric acid, has therefore avoided the pollution of fluorine gas to environment, has reduced the production cost of phosphoric acid.
The utility model has designed, the silicofluoric acid generating unit is set to include Venturi meter, the silicofluoric acid recycle pump, the silicofluoric acid recycle column, the silicofluoric acid groove, exhaust fan and tail gas chimney, high-order reactive tank is set to be communicated with extraction tank, one end of Venturi meter is set to be communicated with extraction tank, the upper end of silicofluoric acid recycle column is set to be communicated with the Venturi meter the other end, the lower end of silicofluoric acid recycle column is set to be communicated with Venturi meter by the silicofluoric acid recycle pump, the tail gas chimney is communicated with by the upper end of exhaust fan with the silicofluoric acid recycle column, the input aperture of silicofluoric acid groove is set to be communicated with the lower end of silicofluoric acid recycle column, and the delivery port of silicofluoric acid groove is set to be communicated with high-order reactive tank.
Description of drawings
Fig. 1 is a synoptic diagram of the present utility model.
Embodiment
Accompanying drawing is an embodiment of the present utility model, specify present embodiment in conjunction with the accompanying drawings, include high-order reactive tank 1, extraction tank 2, Venturi meter 3, silicofluoric acid recycle pump 4, silicofluoric acid recycle column 5, exhaust fan 6, tail gas chimney 7 and silicofluoric acid groove 8, high-order reactive tank 1 is set to be communicated with extraction tank 2, one end of Venturi meter 3 is set to be communicated with extraction tank 2, the upper end of silicofluoric acid recycle column 5 is set to be communicated with Venturi meter 3 the other ends, the lower end of silicofluoric acid recycle column 5 is set to be communicated with Venturi meter 3 by silicofluoric acid recycle pump 4, tail gas chimney 7 is communicated with the upper end of silicofluoric acid recycle column 5 by exhaust fan 6, the input aperture of silicofluoric acid groove 8 is set to be communicated with the lower end of silicofluoric acid recycle column 5, and the delivery port of silicofluoric acid groove 8 is set to be communicated with high-order reactive tank 1.
After Rock Phosphate (72Min BPL) is prepared into phosphorus ore slurry, at first in high-order reactive tank 1, react with silicofluoric acid, pour in the extraction tank 2 again and light phosphoric acid, the vitriol oil reacts, keeping the temperature of extraction tank 2 is 95 ℃, carried out three hours, just can obtain phosphoric acid, when extraction tank 2 reacts, the fluorine gas main component that produces is a hydrogen fluoride, silicon tetrafluoride gas, this part gas enters by Venturi meter 3 and enters into silicofluoric acid recycle column 5, absorb the generation silicofluoric acid by water, the concentration of silicofluoric acid is about 17%, and silicofluoric acid enters into silicofluoric acid groove 8, be transported to again in the high-order reactive tank 1 and react with the phosphorus ore slurry earlier, make the part phosphorus ore decompose, with reacted slip again with sulfuric acid reaction, make phosphoric acid.
Show that through test substitute part of sulfuric acid and phosphorus ore prepared in reaction technical grade phosphoric acid by wet process with silicofluoric acid, one ton of phosphoric acid can be saved 41 kilograms of sulfuric acid, has prevented the discharging of fluorine gas again, has reduced the pollution of fluorine gas to environment.According to the scale of producing 40000 tons of wet method industrial phosphoric acids per year, can save 1640 tons of sulfuric acid, the sulfuric acid price can be saved 65.6 ten thousand yuan in 1 year according to 400 yuan of/ton calculating.
The characteristics of the utlity model has down:
1, owing to designed the silicofluoric acid generating unit, the fluorine gas recycling to extraction tank 2 produces substitutes part of sulfuric acid with silicofluoric acid simultaneously, no longer all uses sulfuric acid, has therefore avoided the pollution of fluorine gas to environment, has reduced the production cost of phosphoric acid.
2, owing to designed high-order reactive tank, the silicofluoric acid that the silicofluoric acid generating unit can be produced is used for instead of part sulfuric acid and comes decomposing phosphate rock to produce phosphoric acid, makes to produce phosphoric acid and react in two steps.
3, owing to designed Venturi meter 3, silicofluoric acid recycle pump 4 and silicofluoric acid recycle column 5, just react, improved the efficient of producing of silicofluoric acid with water at Venturi meter 3.
Be used to produce in the reaction unit technical field of phosphoric acid; Be used for phosphorus ore slurry link to each other with the high-order reactive tank 1 of silicofluoric acid reaction, with high-order reactive tank 1 and be used for phosphorus ore and starch and link to each other with the extraction tank 2 of light phosphoric acid and strong sulfuric acid response, with extraction tank 2 and be used to collect the silicofluoric acid generating unit that fluorine gas is produced silicofluoric acid every including, and the technology contents that the silicofluoric acid generating unit is set to be communicated with high-order reactive tank 1 is all in protection domain of the present utility model.
Claims (2)
1. reaction unit that is used to produce phosphoric acid; It is characterized in that: include and be used for phosphorus ore slurry and link to each other with the high-order reactive tank (1) of silicofluoric acid reaction, with high-order reactive tank (1) and be used for phosphorus ore and starch and link to each other with the extraction tank (2) of light phosphoric acid and strong sulfuric acid response, with extraction tank (2) and be used to collect the silicofluoric acid generating unit that fluorine gas is produced silicofluoric acid, the silicofluoric acid generating unit is set to be communicated with high-order reactive tank (1).
2. the reaction unit that is used to produce phosphoric acid according to claim 1; It is characterized in that: the silicofluoric acid generating unit is set to include Venturi meter (3), silicofluoric acid recycle pump (4), silicofluoric acid recycle column (5), silicofluoric acid groove (8), exhaust fan (6) and tail gas chimney (7), high-order reactive tank (1) is set to be communicated with extraction tank (2), one end of Venturi meter (3) is set to be communicated with extraction tank (2), the upper end of silicofluoric acid recycle column (5) is set to be communicated with Venturi meter (3) the other end, the lower end of silicofluoric acid recycle column (5) is set to be communicated with Venturi meter (3) by silicofluoric acid recycle pump (4), tail gas chimney (7) is communicated with the upper end of silicofluoric acid recycle column (5) by exhaust fan (6), the input aperture of silicofluoric acid groove (8) is set to be communicated with the lower end of silicofluoric acid recycle column (5), and the delivery port of silicofluoric acid groove (8) is set to be communicated with high-order reactive tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320034500 CN203079693U (en) | 2013-01-23 | 2013-01-23 | Reaction device for preparing phosphoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320034500 CN203079693U (en) | 2013-01-23 | 2013-01-23 | Reaction device for preparing phosphoric acid |
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| Publication Number | Publication Date |
|---|---|
| CN203079693U true CN203079693U (en) | 2013-07-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320034500 Expired - Fee Related CN203079693U (en) | 2013-01-23 | 2013-01-23 | Reaction device for preparing phosphoric acid |
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| CN (1) | CN203079693U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106882776A (en) * | 2017-04-11 | 2017-06-23 | 胡士清 | wet-process phosphoric acid production system and wet-process phosphoric acid production method |
| CN111847412A (en) * | 2020-07-31 | 2020-10-30 | 天宝动物营养科技股份有限公司 | Recycling process of fluosilicic acid in phosphoric acid extraction process |
-
2013
- 2013-01-23 CN CN 201320034500 patent/CN203079693U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106882776A (en) * | 2017-04-11 | 2017-06-23 | 胡士清 | wet-process phosphoric acid production system and wet-process phosphoric acid production method |
| CN111847412A (en) * | 2020-07-31 | 2020-10-30 | 天宝动物营养科技股份有限公司 | Recycling process of fluosilicic acid in phosphoric acid extraction process |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130724 Termination date: 20180123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |