CN101972584A - Device and process for washing phosphoric acid tail gas and cogenerating sodium fluosilicate - Google Patents
Device and process for washing phosphoric acid tail gas and cogenerating sodium fluosilicate Download PDFInfo
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- CN101972584A CN101972584A CN 201010527908 CN201010527908A CN101972584A CN 101972584 A CN101972584 A CN 101972584A CN 201010527908 CN201010527908 CN 201010527908 CN 201010527908 A CN201010527908 A CN 201010527908A CN 101972584 A CN101972584 A CN 101972584A
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Abstract
The invention discloses a device for washing phosphoric acid tail gas and cogenerating sodium fluosilicate. The device comprises a venturi tube, a washer liquid tank, a washing tower I, a washing tower II, a tail gas washer, a defoamer, a tail gas fan, a tail gas chimney, a washer liquid geosyncline, a venturi tube washing pump, a filter press feed pump, a frame filter press, a fluosilicic acid pool, a fluosilicic acid pump and a sodium fluosilicate reaction tank. The invention also discloses a process for washing phosphoric acid tail gas and cogenerating sodium fluosilicate. The process comprises the following steps: washing the phosphoric acid tail gas with water, wherein the fluosilicic acid is dissolved in water; adding sodium sulfate into the water with the dissolved fluosilicic acid for reaction to generate sodium fluosilicate and sulfuric acid; and filtering to obtain sodium fluosilicate. The invention solves the problem of using the byproduct fluosilicic acid in the production process, improves the operation quality of the environmental protection equipment in plants, guarantees the environment quality and creates new economic growth points.
Description
Technical field
The present invention relates to a kind of device and technology of washing phosphoric acid tail gas and coproduction prodan.
Background technology
At present, most chemical enterprise constantly increases environmental protection equipment to guarantee the various tail gas of qualified discharge, the environment of preserving our planet on the basis of original environmental protection equipment.Yet the middle byproduct of Chan Shenging just constantly increases like this, and fluosilicic acid is exactly wherein one.Continual in service at environmental protection facility, produce a large amount of fluosilicic acid byproducts, it has extremely strong corrosivity, is difficult for storing, and gives the ordinary production of our chemical enterprise, and the normal operation of environmental protection facility brings puzzlement.
Summary of the invention
At above-mentioned prior art; in order to protect environment, reduce pollutant emission, recycle resource, to improve the business economic benefit; the present invention provides a kind of device and technology of washing phosphoric acid tail gas and coproduction prodan on the basis that original washing tail gas system is transformed.
The present invention is achieved by the following technical solutions:
A kind of device that washs phosphoric acid tail gas and coproduction prodan, comprise Venturi tube, the washing lotion groove, one washes tower, two wash tower, exhaust scrubber, bubble trap, exhaust fan, tail gas funnel, the washing lotion geosyncline, the Venturi tube washing pump, the filter press feed pump, plate and frame type filter-press, the fluosilicic acid pond, fluosilicic acid pump and prodan reactive tank, one washes tower is provided with one and washes the tower pump, two wash tower is provided with two and washes the tower pump, wherein, the connection of each assembly is divided into three pipelines, as follows: Venturi tube, the washing lotion groove, one washes tower, two wash tower, exhaust scrubber, bubble trap, exhaust fan is connected successively with tail gas funnel, for phosphoric acid tail gas is handled pipeline; Two Xi Ta, one wash tower, washing lotion geosyncline, Venturi tube washing pump, Venturi tube and washing lotion groove and are connected successively, handle pipeline together with aforementioned phosphoric acid tail gas, are the cleaning solution circulation line; Washing lotion geosyncline, filter press feed pump, plate and frame type filter-press, fluosilicic acid pond, fluosilicic acid pump and prodan reactive tank are connected successively, for fluosilicic acid is handled pipeline; Described connection is pipeline and connects.
A kind of technology of washing phosphoric acid tail gas and coproduction prodan, step is: after the phosphoric acid tail gas water washed, then fluosilicic acid was water-soluble, in the water that is dissolved with fluosilicic acid, add sodium sulphate then, react, generate prodan and sulfuric acid, filter, promptly obtain prodan.
Concrete steps are:
(1) after phosphoric acid tail gas is extracted out by reactive tank three districts, inhale towers and wash through venturi tube, a suction tower, two, then fluosilicic acid is water-soluble, and cleaning solution is recycling; After other not water-soluble tail gas enters exhaust scrubber, bubble trap, exhaust fan and tail gas funnel, carry out emptying;
(2) replenishing of cleaning solution: wash the tower moisturizing from two, branch to then and wash tower, wash tower from again and branch to the washing lotion geosyncline, squeeze into the absorption that circulates of Venturi tube, washing lotion groove by the Venturi tube washing pump;
(3) preparation of prodan: the cleaning solution that is dissolved with fluosilicic acid is delivered to deckle board formula filter press by the filter press feed pump, carry out press filtration, filtrate enters the fluosilicic acid pond, squeeze into the prodan reactive tank through the fluosilicic acid pump again, add sodium sulphate then in the prodan reactive tank, prodan is produced in reaction, filters, promptly get the prodan finished product, reactant liquor is recycled: add phosphoric acid extraction groove decomposing phosphate rock slurry.
During use, the silica gel that press filtration goes out to deckle board formula filter press was once cleared up and was concentrated to reclaim and place in per 8 hours.
The reaction principle that the present invention prepares prodan is: H
2SiF
6+ Na
2SO
4=Na
2SiF
6+ H
2SO
4
During concrete the reaction, should be according to actual conditions, control adds the amount of sodium sulphate, accomplishes that as much as possible fluosilicic acid is all reacted, and does not waste sodium sulphate.
Method of the present invention is produced the tendency that prodan is a kind of economizing economy development; and can also help environmental protection; be used for producing the chemical enterprise that the fluoride intermediate products occur; carry out the fluoride washing by the washing tail gas device; use separator (filter press) that fluosilicic acid is separated again; add a certain amount of fluosilicic acid in reactive tank, add the metabisulfite solution for preparing then in proportion, the back gets the product prodan with centrifuge with Separation of Solid and Liquid.
The present invention when not influencing production task, can guarantee the operation of environmental protection facility 100% for middle byproduct again.During concrete the application, can utilize discarded reactive tank to produce prodan, and the diluted acid that filter produces be squeezed into reactive tank and continues to use, and can not only solve the puzzlement that fluosilicic acid brings to enterprise like this, can also save resource according to the existence conditions of factory.
Advantage of the present invention is: improved effect is that phosphoric acid workshop tail gas clean result is obvious, is lower than discharging standards.Fluosilicic acid concentration row in the fluosilicic acid pond is measured, and fluosilicic acid concentration can be stablized and is controlled between the 10-15%.Visual method checks that to discharging tail gas tail gas obviously reduces.Use problem to byproduct fluosilicic acid in the production process is resolved, and has improved the running quality of workshop environmental protection equipment, when guaranteeing environmental quality, has opened up new growth engines.
Description of drawings
Fig. 1 is the structural representation of the device of washing phosphoric acid tail gas of the present invention and coproduction prodan;
Fig. 2 is the process chart of washing phosphoric acid tail gas of the present invention and coproduction prodan.
Wherein, 1, Venturi tube; 2, washing lotion groove; 3, one wash tower; 4, two wash tower; 5, exhaust scrubber; 6, bubble trap; 7, exhaust fan; 8, tail gas funnel; 9, washing lotion geosyncline; 10, Venturi tube washing pump; 11, filter press feed pump; 12, plate and frame type filter-press; 13, fluosilicic acid pond; 14, fluosilicic acid pump; 15, prodan reactive tank; 16, one wash the tower pump; 17, two wash the tower pump.
The specific embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
A kind of device that washs phosphoric acid tail gas and coproduction prodan, comprise Venturi tube 1, washing lotion groove 2, one washes tower 3, two wash tower 4, exhaust scrubber 5, bubble trap 6, exhaust fan 7, tail gas funnel 8, washing lotion geosyncline 9, Venturi tube washing pump 10, filter press feed pump 11, plate and frame type filter-press 12, fluosilicic acid pond 13, fluosilicic acid pump 14 and prodan reactive tank 15, as shown in Figure 1, one washes tower 3 is provided with one and washes tower pump 16, two wash tower 4 is provided with two and washes tower pump 17, wherein, the connection of each assembly is divided into three pipelines, as follows: Venturi tube 1, washing lotion groove 2, one washes tower 3, two wash tower 4, exhaust scrubber 5, bubble trap 6, exhaust fan 7 is connected successively with tail gas funnel 8, for phosphoric acid tail gas is handled pipeline; Two wash tower 4, washes tower 3, washing lotion geosyncline 9, Venturi tube washing pump 10, Venturi tube 1 and washing lotion groove 2 and is connected successively, handles pipeline together with aforementioned phosphoric acid tail gas, is the cleaning solution circulation line; Washing lotion geosyncline 9, filter press feed pump 10, plate and frame type filter-press 11, fluosilicic acid pond 12, fluosilicic acid pump 13 and prodan reactive tank 14 are connected successively, for fluosilicic acid is handled pipeline; Described connection is pipeline and connects.
1 one kinds of technologies of washing phosphoric acid tail gas and coproduction prodan of embodiment, flow chart as shown in Figure 2, the direction of arrow is represented the traffic direction of material among the figure.Concrete steps are:
(1) after phosphoric acid tail gas is extracted out by reactive tank three districts, inhale towers 4 and wash through venturi tube 1, washing lotion groove 2, a suction tower 3, two, then fluosilicic acid is water-soluble, and cleaning solution is recycling; Other not water-soluble tail gas carries out emptying after entering exhaust scrubber 5, bubble trap 6, exhaust fan 7 and tail gas funnel 8;
(2) replenishing of cleaning solution: wash tower 4 moisturizings from two, branch to then and wash tower 3, wash tower 3 from again and branch to washing lotion geosyncline 9, squeeze into the absorption that circulates of Venturi tube 1, washing lotion groove 2 by Venturi tube washing pump 10;
(3) preparation of prodan: the cleaning solution that is dissolved with fluosilicic acid is delivered to deckle board formula filter press 12 by filter press feed pump 11, carry out press filtration, filtrate enters fluosilicic acid pond 13, squeeze into prodan reactive tank 15 through fluosilicic acid pump 14 again, add sodium sulphate then in prodan reactive tank 15, prodan is produced in reaction, filters, promptly get the prodan finished product, reactant liquor is recycled: add phosphoric acid extraction groove decomposing phosphate rock slurry.
During use, the silica gel that 12 press filtrations go out to deckle board formula filter press was once cleared up and was concentrated to reclaim and place in per 8 hours.
The reaction principle that the present invention prepares prodan is: H
2SiF
6+ Na
2SO
4=Na
2SiF
6+ H
2SO
4
During concrete the reaction, should be according to actual conditions, control adds the amount of sodium sulphate, accomplishes that as much as possible fluosilicic acid is all reacted, and does not waste sodium sulphate.
Claims (3)
1. device that washs phosphoric acid tail gas and coproduction prodan, it is characterized in that: comprise Venturi tube, the washing lotion groove, one washes tower, two wash tower, exhaust scrubber, bubble trap, exhaust fan, tail gas funnel, the washing lotion geosyncline, the Venturi tube washing pump, the filter press feed pump, plate and frame type filter-press, the fluosilicic acid pond, fluosilicic acid pump and prodan reactive tank, one washes tower is provided with one and washes the tower pump, two wash tower is provided with two and washes the tower pump, wherein, the connection of each assembly is divided into three pipelines, as follows: Venturi tube, the washing lotion groove, one washes tower, two wash tower, exhaust scrubber, bubble trap, exhaust fan is connected successively with tail gas funnel, for phosphoric acid tail gas is handled pipeline; Two Xi Ta, one wash tower, washing lotion geosyncline, Venturi tube washing pump, Venturi tube and washing lotion groove and are connected successively, handle pipeline together with aforementioned phosphoric acid tail gas, are the cleaning solution circulation line; Washing lotion geosyncline, filter press feed pump, plate and frame type filter-press, fluosilicic acid pond, fluosilicic acid pump and prodan reactive tank are connected successively, for fluosilicic acid is handled pipeline; Described connection is pipeline and connects.
2. technology of washing phosphoric acid tail gas and coproduction prodan, it is characterized in that: step is: after the phosphoric acid tail gas water washed, then fluosilicic acid was water-soluble, in the water that is dissolved with fluosilicic acid, add sodium sulphate then, react, generate prodan and sulfuric acid, filter, promptly obtain prodan.
3. the technology of washing phosphoric acid tail gas according to claim 1 and coproduction prodan is characterized in that: concrete steps are:
(1) after phosphoric acid tail gas is extracted out by reactive tank three districts, inhale towers and wash through venturi tube, a suction tower, two, then fluosilicic acid is water-soluble, and cleaning solution is recycling; After other not water-soluble tail gas enters exhaust scrubber, bubble trap, exhaust fan and tail gas funnel, carry out emptying;
(2) replenishing of cleaning solution: wash the tower moisturizing from two, branch to then and wash tower, wash tower from again and branch to the washing lotion geosyncline, squeeze into the absorption that circulates of Venturi tube, washing lotion groove by the Venturi tube washing pump;
(3) preparation of prodan: the cleaning solution that is dissolved with fluosilicic acid is delivered to deckle board formula filter press by the filter press feed pump, carry out press filtration, filtrate enters the fluosilicic acid pond, squeeze into the prodan reactive tank through the fluosilicic acid pump again, add sodium sulphate then in the prodan reactive tank, prodan is produced in reaction, filters, promptly get the prodan finished product, reactant liquor is recycled.
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| CN 201010527908 CN101972584A (en) | 2010-11-01 | 2010-11-01 | Device and process for washing phosphoric acid tail gas and cogenerating sodium fluosilicate |
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|---|---|---|---|
| CN 201010527908 CN101972584A (en) | 2010-11-01 | 2010-11-01 | Device and process for washing phosphoric acid tail gas and cogenerating sodium fluosilicate |
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| CN101972584A true CN101972584A (en) | 2011-02-16 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102258929A (en) * | 2011-05-19 | 2011-11-30 | 武汉市中东化工有限公司 | Method for recycling phosphoric acid-produced exhaust |
| CN102826552A (en) * | 2012-09-18 | 2012-12-19 | 贵州开磷（集团）有限责任公司 | Method for recycling fluosilicic acid from phosphoric acid extraction tail gas |
| CN102976346A (en) * | 2012-07-20 | 2013-03-20 | 山东胜通集团股份有限公司 | Automatic control system for layered crystal sodium disilicate production line |
| CN103446851A (en) * | 2013-08-21 | 2013-12-18 | 泉州市天龙环境工程有限公司 | Recovery and purification device and method for phosphoric acid from tail gases generated in chemical method activated carbon production process |
| CN104401950A (en) * | 2014-10-24 | 2015-03-11 | 聊城市鲁西化工工程设计有限责任公司 | Device and process for co-production of fluosilicate in phosphate rock-to-phosphoric acid production |
| CN105084368A (en) * | 2015-08-10 | 2015-11-25 | 山东聊城鲁西化工第四化肥有限公司 | Method for producing sodium fluorosilicate through comprehensive utilization of sulphur-burning sulphuric acid tail gas and phosphoric acid tail gas |
| CN107281900A (en) * | 2017-06-20 | 2017-10-24 | 宁夏农丰源肥业科技有限公司 | The processing method of tail gas during calcium superphosphate is produced using Waste Sulfuric Acid |
| CN108046271A (en) * | 2018-01-31 | 2018-05-18 | 湖北三宁化工股份有限公司 | A kind of device and technique of continuous production prodan |
| CN110562987A (en) * | 2019-09-03 | 2019-12-13 | 贵州开磷集团矿肥有限责任公司 | Method and equipment for reducing production amount of sewage in sodium fluosilicate production and recycling sewage |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102258929A (en) * | 2011-05-19 | 2011-11-30 | 武汉市中东化工有限公司 | Method for recycling phosphoric acid-produced exhaust |
| CN102976346A (en) * | 2012-07-20 | 2013-03-20 | 山东胜通集团股份有限公司 | Automatic control system for layered crystal sodium disilicate production line |
| CN102976346B (en) * | 2012-07-20 | 2014-07-02 | 山东胜通集团股份有限公司 | Automatic control system for layered crystal sodium disilicate production line |
| CN102826552A (en) * | 2012-09-18 | 2012-12-19 | 贵州开磷（集团）有限责任公司 | Method for recycling fluosilicic acid from phosphoric acid extraction tail gas |
| CN102826552B (en) * | 2012-09-18 | 2014-09-10 | 贵州开磷（集团）有限责任公司 | Method for recycling fluosilicic acid from phosphoric acid extraction tail gas |
| CN103446851A (en) * | 2013-08-21 | 2013-12-18 | 泉州市天龙环境工程有限公司 | Recovery and purification device and method for phosphoric acid from tail gases generated in chemical method activated carbon production process |
| CN104401950A (en) * | 2014-10-24 | 2015-03-11 | 聊城市鲁西化工工程设计有限责任公司 | Device and process for co-production of fluosilicate in phosphate rock-to-phosphoric acid production |
| CN104401950B (en) * | 2014-10-24 | 2016-06-08 | 聊城市鲁西化工工程设计有限责任公司 | The device of a kind of phosphorus ore phosphoric acid coproduction silicofluoride made of stones and technique |
| CN105084368A (en) * | 2015-08-10 | 2015-11-25 | 山东聊城鲁西化工第四化肥有限公司 | Method for producing sodium fluorosilicate through comprehensive utilization of sulphur-burning sulphuric acid tail gas and phosphoric acid tail gas |
| CN107281900A (en) * | 2017-06-20 | 2017-10-24 | 宁夏农丰源肥业科技有限公司 | The processing method of tail gas during calcium superphosphate is produced using Waste Sulfuric Acid |
| CN108046271A (en) * | 2018-01-31 | 2018-05-18 | 湖北三宁化工股份有限公司 | A kind of device and technique of continuous production prodan |
| CN110562987A (en) * | 2019-09-03 | 2019-12-13 | 贵州开磷集团矿肥有限责任公司 | Method and equipment for reducing production amount of sewage in sodium fluosilicate production and recycling sewage |
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Application publication date: 20110216 |