CN103213961A - Closed cyclic utilization method for production water of monoammonium phosphate - Google Patents
Closed cyclic utilization method for production water of monoammonium phosphate Download PDFInfo
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- CN103213961A CN103213961A CN2012101549337A CN201210154933A CN103213961A CN 103213961 A CN103213961 A CN 103213961A CN 2012101549337 A CN2012101549337 A CN 2012101549337A CN 201210154933 A CN201210154933 A CN 201210154933A CN 103213961 A CN103213961 A CN 103213961A
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Abstract
A closed cyclic utilization method for production water of monoammonium phosphate, is suitable for a dihydrate pulp wet-process phosphoric acid technology and an ammonia neutralization fluidized drying phosphate fertilizer production system. A production water cyclic system mainly comprises a clear water recovery pond, a sewage settling basin, a settlement and overflow groove, a water flushing and distribution tank, a thick slurry groove, a round plate filter, an extraction tail gas washing tower, a dried tail gas washing tower. Multi stage closed cyclic utilization is preformed on sewage, and primary water consumed by per ton product is 2.5-2.8t, in order to supplement water entering into the product or phosphogypsum and lost by evaporation. The method provided by the invention resolves problems of a lot of sewage and difficult treatment, which puzzles a monoammonium phosphate production enterprise for a long time. The method has advantages of simple technology process, good sewage treating effect, small technology equipment and investment, low personnel labor intensity and high water utilization rate. The method can effectively save water resource, the water consumption of monoammonium phosphate product is reduced to 2.5-2.8t per ton product from 20t per ton product. The method implements closed cyclic utilization for production water of monoammonium phosphate, and zero discharge of sewage.
Description
Technical field
The present invention relates to the monoammonium phosphate production technical field, is that a kind of monoammonium phosphate water of productive use closed circulation is utilized method specifically.
Background technology
At present, the fluorine containing waste water that monoammonium phosphate production produces, dust-laden sewage, maintenance sewage, II are imitated the water of condensation of flashing chamber, directly are discharged to sewage works, efflux after the comprehensive treating process of employing lime; And the cooling water of vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, water cooling tower pump, gas blower and other phosphorus ammonium equipment, the water that washing extraction tank tail gas is used, the water that the flushing disk filter is used, the operations such as water that washing drying tower tail gas is used all use water one time, and general monoammonium phosphate is produced about 20 tons of ton water consumption.
Above-mentioned monoammonium phosphate production waste utilizes technology to have following deficiency.
1, monoammonium phosphate is produced water consumption height, and the utilization ratio of water resources is low;
2, production waste directly is discharged to sewage works, effluxes after the comprehensive treating process of employing lime, and blowdown flow rate is big, does not reach the technical requirements of environmental protection to water quality;
3, sewage disposal expense height, phosphor resource and water resource waste are serious.
Summary of the invention
For overcoming the deficiency that existing monoammonium phosphate production waste utilizes method, goal of the invention of the present invention is to provide a kind of monoammonium phosphate water of productive use closed circulation to utilize method, to improve the utilization ratio of water resources, realizes sewage zero-discharge.
For achieving the above object, technology thinking of the present invention is: utilize the clear water pond for recovering, recovery vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, water cooling tower pump, gas blower and other phosphorus ammonium component cooling water; Simultaneously, replenish a water to the clear water pond for recovering, the moisture five tunnel of clear water pond for recovering is walked: the first via is used as vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, water cooling tower pump, gas blower and other phosphorus ammonium component cooling water; The second the tunnel removes to wash extraction tank tail gas, and the sewage after the washing enters the sewage settling bowl; Third Road removes to wash drying tower tail gas, and then concentrates the moisturizing of production system as neutralization; The four the tunnel goes to the water cooling tower moisturizing, replenishes the moisture of water cooling tower evaporation and blowdown loss, reclaims the water of condensation that II is imitated flashing chamber, goes to the water cooling tower moisturizing, and the sewer of water cooling tower directly goes to the ball mill moisturizing; The five the tunnel removes to wash three of disk filter washes the district, forms to filter three washing filtrates, and three washing filtrates remove the sedimentation overflow groove.The sewage settling bowl reclaims two portions sewage: the fluorine containing waste water that the sewage of maintenance cleaning pipeline and fluorine absorption system produce, the clear liquid on sewage settling bowl top is made the sedimentation overflow groove again, clear liquor in the groove enters towards the cloth tank through overflow, upper clear supernate is as the punch plate district that removes to wash disk filter towards water distribution, generation punch plate phosphogypsum plants water and enters the sedimentation overflow groove, and water removes thick stock tank on the cloth; Behind sedimentation overflow groove and the liquid separation solid formation in the cloth tank, the thick slurry in bottom flows into thick stock tank, squeezes into two of disk filter as two wash waters and washes the district and wash, and produces two washing filtrates; Two washing filtrates as a wash water squeeze into one of disk filter wash the district wash, produce a washing filtrate and send to extraction tank.In whole process, one time water consumption is 2.5 ~ 2.8 tons, and sewage carries out cascade utilization, realizes that closed circulation does not efflux.
The present invention includes following operation.
(a) replenish a water to the clear water pond for recovering;
(b) recovery is used for vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, water cooling tower pump, gas blower and other phosphorus ammonium component cooling water to the clear water pond for recovering;
(c) a part of clear water with the clear water pond for recovering is delivered to vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, dredge pump, gas blower and other phosphorus ammonium equipment, and these equipment are cooled off;
(d) a part of clear water of clear water pond for recovering removes to extract tail gas washing tower, is used for washing the fluorine of extraction tank tail gas, forms fluorine containing waste water, reclaims fluorine containing waste water then to the sewage settling bowl;
(e) a part of clear water with the clear water pond for recovering is delivered to drying tower, is used to wash drying tower tail gas, and the monoammonium phosphate dust that contains in the flush away tail gas during this part dry wash water is got to and concentration systems, is got back in the product production system and utilized;
(f) a part of clear water with the clear water pond for recovering is delivered to water cooling tower, replenishes the water of water cooling tower evaporation and blowdown loss;
(g) reclaim the water of condensation that II is imitated flashing chamber, go to the water cooling tower moisturizing, the sewer of water cooling tower is directly sent to ball mill and is entered production system;
(h) a part of water of clear water pond for recovering cleans three of disk filter as three wash waters and washes the district, and the washings that comes out is called three washing filtrates;
(i) three washing filtrates are made the sedimentation overflow groove by three filter wash liquid pumps, and the cell body upper liquid flows into towards the cloth tank by the mode of overflow;
(j) the thick slurry in the bottom of sedimentation overflow groove flows into thick stock tank, gets to disk filter two by thick stock pump and washes the district, and as two wash waters flushing filter disc, the liquid that comes out is called two washing filtrates;
(k) two washing filtrates are got to disk filter one by two filter wash liquid pumps and are washed the district, and as wash water flushing filter disc, the liquid that comes out is called a washing filtrate, and a washing filtrate removes extraction tank;
(l) reclaim the maintenance sewage be used to clear up pipeline and fluorine containing waste water to the sewage settling bowl;
(m) clear liquid on sewage settling bowl top is delivered to the sedimentation overflow groove by sump pump, and water is used as a supplement;
(n) the thick slurry of sewage settling bowl bottom is transported to extraction tank, enters production system;
(o) use towards water distribution towards the upper clear supernate conduct of cloth tank, with squeezing into the punch plate district of disk filter towards water distribution towards the cloth water pump, the liquid after the washing is called punch plate phosphogypsum sewage, and punch plate phosphogypsum sewage is divided on the cloth water and plants water, water removes thick stock tank on the cloth, plants water and removes the sedimentation overflow groove;
(p) flow into thick stock tank towards the thick slurry in the bottom of cloth tank, the liquid in the thick stock tank goes disk filter two to wash the district, carries out recycle.
The present invention has compared with prior art solved and has perplexed the monoammonium phosphate manufacturing enterprise sewage water yield for a long time
Administer difficult a great problem greatly,, technological process is simple, good sewage processing effect, processing unit and less investment, personnel labor intensity is low, water use efficiency height, effectively conserve water resource, monoammonium phosphate product water consumption is reduced to 2.5 ~ 2.8 tons of/ton products by about 20 tons, realizes utilization of monoammonium phosphate water of productive use closed circulation and sewage zero-discharge.
Description of drawings
Fig. 1 is a schema of the present invention.
Embodiment
As shown in Figure 1, the present invention includes following operation.
(a) replenish a water to the clear water pond for recovering;
(b) recovery is used for vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, water cooling tower pump, gas blower and other phosphorus ammonium component cooling water to the clear water pond for recovering;
(c) a part of clear water with the clear water pond for recovering is delivered to vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, dredge pump, gas blower and other phosphorus ammonium equipment, and these equipment are cooled off;
(d) a part of clear water of clear water pond for recovering removes to extract tail gas washing tower, is used for washing the fluorine of extraction tank tail gas, forms fluorine containing waste water, reclaims fluorine containing waste water then to the sewage settling bowl;
(e) a part of clear water with the clear water pond for recovering is delivered to drying tower, is used to wash drying tower tail gas, and the monoammonium phosphate dust that contains in the flush away tail gas during this part dry wash water is got to and concentration systems, is got back in the product production system and utilized;
(f) a part of clear water with the clear water pond for recovering is delivered to water cooling tower, replenishes the moisture of water cooling tower evaporation and blowdown loss;
(g) reclaim the water of condensation that II is imitated flashing chamber, go to the water cooling tower moisturizing, the sewer of water cooling tower is directly sent to ball mill and is entered production system;
(h) a part of water of clear water pond for recovering cleans three of disk filter as three wash waters and washes the district, and the washings that comes out is called three washing filtrates;
(i) three washing filtrates are made the sedimentation overflow groove by three filter wash liquid pumps, and the cell body upper liquid flows into towards the cloth tank by the mode of overflow;
(j) the thick slurry in the bottom of sedimentation overflow groove flows into thick stock tank, gets to disk filter two by thick stock pump and washes the district, and as two wash waters flushing filter disc, the liquid that comes out is called two washing filtrates;
(k) two washing filtrates are got to disk filter one by two filter wash liquid pumps and are washed the district, and as wash water flushing filter disc, the liquid that comes out is called a washing filtrate, and a washing filtrate removes extraction tank;
(l) reclaim the maintenance sewage be used to clear up pipeline and fluorine containing waste water to the sewage settling bowl;
(m) clear liquid on sewage settling bowl top is delivered to the sedimentation overflow groove by sump pump, and water is used as a supplement;
(n) the thick slurry of sewage settling bowl bottom is transported to extraction tank, enters production system;
(o) use towards water distribution towards the upper clear supernate conduct of cloth tank, with squeezing into the punch plate district of disk filter towards water distribution towards the cloth water pump, the liquid after the washing is called punch plate phosphogypsum sewage, and punch plate phosphogypsum sewage is divided on the cloth water and plants water, water removes thick stock tank on the cloth, plants water and removes the sedimentation overflow groove;
(p) flow into thick stock tank towards the thick slurry in the bottom of cloth tank, the liquid in the thick stock tank goes disk filter two to wash the district, carries out recycle.
Operation of the present invention (a) and (b) in, reclaim and to be used for vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, dredge pump, gas blower and other phosphorus ammonium component cooling water, replenish a water according to water consumption to the clear water pond for recovering again.
Among operation of the present invention (c), (d), (e), (f), (h), the clear water that is come out by the clear water pond for recovering divides five the tunnel to carry out the utilization first time, and the first via is used as vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, dredge pump, gas blower and other phosphorus ammonium component cooling water; The second the tunnel removes to wash the tail gas of extraction tank, after water and the tail gas counter current contact, generates fluorine containing waste water, the decontaminated water settling bowl, the upper clear supernate of sewage settling bowl turns back in the system again, removes to wash disk filter, the thick slurry in bottom is sent into extraction tank, and sewage circulates in inside; Third Road removes to wash the tail gas of drying tower, after the dust in the tail gas washes with water, generates dust-laden sewage, in directly going and concentration systems, reclaims product; The four the tunnel goes to the water cooling tower moisturizing, replenishes the moisture of water cooling tower evaporation and blowdown loss; The five the tunnel removes to wash three of disk filter washes the district, forms to filter three washing filtrates, and three washing filtrates remove the sedimentation overflow groove, and liquid two portions of sedimentation overflow groove utilize, and closed circulation does not efflux, and realizes sewage zero-discharge.
In the operation of the present invention (g), except giving the water cooling tower moisturizing, also reclaim the water of condensation that II is imitated flashing chamber from the clear water pond for recovering, go to the water cooling tower moisturizing, the sewer of water cooling tower enters production system, directly goes to the ball mill moisturizing.
Among operation of the present invention (i), (j), (k), (l), (m), three wash waters that use clear water are through behind the disk filter, generate three washing filtrates, pump into the sedimentation overflow groove again, clear liquid partly goes to wash the punch plate district of disk filter, and thick slurry partly removes to wash two of disk filter and washes the district, and two washing filtrates that come out remove to wash one of disk filter again and wash the district, a washing filtrate that comes out removes extraction tank, enters into production system.
In operation of the present invention (n), the thick slurry in the bottom of sewage settling bowl can not be re-used as the washing water utilization, but contains portioned product, does not efflux, and carries and removes extraction tank, enters into production system.
Among operation of the present invention (o), (p), upper liquid towards the cloth tank is comparatively clean, as using towards water distribution, pump into the punch plate district of disk filter, liquid after the washing is called punch plate phosphogypsum sewage, punch plate phosphogypsum sewage is divided on the cloth water and plants water, water removes thick stock tank on the cloth, plant water and remove the sedimentation overflow groove, liquid flooding in the groove is gone into towards the cloth tank, sedimentation overflow groove and all flow into thick stock tank towards the bottom liquid of cloth tank, the liquid in the thick stock tank goes disk filter two to wash the district, carries out recycle; In this process, the sedimentation overflow groove, constitute a recycle system towards cloth tank, disk filter punch plate district, by thick stock pump thick slurry is shifted out, remove to wash disk filter, utilize the clear liquid moisturizing in the sewage settling bowl, reach balance with this.
Claims (1)
1. a monoammonium phosphate water of productive use closed circulation is utilized method, it is characterized in that: comprise following operation:
(a) replenish a water to the clear water pond for recovering;
(b) recovery is used for vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, water cooling tower pump, gas blower and other phosphorus ammonium component cooling water to the clear water pond for recovering;
(c) a part of clear water with the clear water pond for recovering is delivered to vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, dredge pump, gas blower and other phosphorus ammonium equipment, and these equipment are cooled off;
(d) a part of clear water of clear water pond for recovering removes to extract tail gas washing tower, is used for washing the fluorine of extraction tank tail gas, forms fluorine containing waste water, reclaims fluorine containing waste water then to the sewage settling bowl;
(e) a part of clear water with the clear water pond for recovering is delivered to drying tower, is used to wash drying tower tail gas, and the monoammonium phosphate dust that contains in the flush away tail gas during this part dry wash water is got to and concentration systems, is got back in the product production system and utilized;
(f) a part of clear water with the clear water pond for recovering is delivered to water cooling tower, replenishes the water of water cooling tower evaporation and blowdown loss;
(g) reclaim the water of condensation that II is imitated flashing chamber, go to the water cooling tower moisturizing, the sewer of water cooling tower is directly sent to ball mill and is entered production system;
(h) a part of water of clear water pond for recovering cleans three of disk filter as three wash waters and washes the district, and the washings that comes out is called three washing filtrates;
(i) three washing filtrates are made the sedimentation overflow groove by three filter wash liquid pumps, and the cell body upper liquid flows into towards the cloth tank by the mode of overflow;
(j) the thick slurry in the bottom of sedimentation overflow groove flows into thick stock tank, gets to disk filter two by thick stock pump and washes the district, and as two wash waters flushing filter disc, the liquid that comes out is called two washing filtrates;
(k) two washing filtrates are got to disk filter one by two filter wash liquid pumps and are washed the district, and as wash water flushing filter disc, the liquid that comes out is called a washing filtrate, and a washing filtrate removes extraction tank;
(l) reclaim the maintenance sewage be used to clear up pipeline and fluorine containing waste water to the sewage settling bowl;
(m) clear liquid on sewage settling bowl top is delivered to the sedimentation overflow groove by sump pump, and water is used as a supplement;
(n) the thick slurry of sewage settling bowl bottom is transported to extraction tank, enters production system;
(o) use towards water distribution towards the upper clear supernate conduct of cloth tank, with squeezing into the punch plate district of disk filter towards water distribution towards the cloth water pump, the liquid after the washing is called punch plate phosphogypsum sewage, and punch plate phosphogypsum sewage is divided on the cloth water and plants water, water removes thick stock tank on the cloth, plants water and removes the sedimentation overflow groove;
(p) flow into thick stock tank towards the thick slurry in the bottom of cloth tank, the liquid in the thick stock tank goes disk filter two to wash the district, carries out recycle.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103520993A (en) * | 2013-10-16 | 2014-01-22 | 瓮福紫金化工股份有限公司 | Filtering cloth washing water filtering system in wet-process phosphoric acid production |
| CN104477863A (en) * | 2014-11-18 | 2015-04-01 | 瓮福（集团）有限责任公司 | Method for reducing usage amount of fresh water in phosphoric acid by wet process |
| CN107522335A (en) * | 2017-07-31 | 2017-12-29 | 湖北祥云(集团)化工股份有限公司 | A kind of utilization system of phosphoric acid and phosphate waste |
| CN108178190A (en) * | 2018-03-08 | 2018-06-19 | 四川龙蟒钛业股份有限公司 | A kind of method for improving disk filtration efficiency and ferrous sulfate quality |
| CN108178189A (en) * | 2018-03-08 | 2018-06-19 | 四川龙蟒钛业股份有限公司 | A kind of method for effectively avoiding titanium liquid premature hydrolysis |
| CN108408768A (en) * | 2018-04-25 | 2018-08-17 | 四川龙蟒钛业股份有限公司 | A method of efficiently using metatitanic acid washing filtrate |
| CN110510589A (en) * | 2019-09-10 | 2019-11-29 | 湖北祥云(集团)化工股份有限公司 | A kind of Wet-process Phosphoric Acid Production method and production system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103520993A (en) * | 2013-10-16 | 2014-01-22 | 瓮福紫金化工股份有限公司 | Filtering cloth washing water filtering system in wet-process phosphoric acid production |
| CN104477863A (en) * | 2014-11-18 | 2015-04-01 | 瓮福（集团）有限责任公司 | Method for reducing usage amount of fresh water in phosphoric acid by wet process |
| CN107522335A (en) * | 2017-07-31 | 2017-12-29 | 湖北祥云(集团)化工股份有限公司 | A kind of utilization system of phosphoric acid and phosphate waste |
| CN108178190A (en) * | 2018-03-08 | 2018-06-19 | 四川龙蟒钛业股份有限公司 | A kind of method for improving disk filtration efficiency and ferrous sulfate quality |
| CN108178189A (en) * | 2018-03-08 | 2018-06-19 | 四川龙蟒钛业股份有限公司 | A kind of method for effectively avoiding titanium liquid premature hydrolysis |
| CN108178189B (en) * | 2018-03-08 | 2019-11-05 | 四川龙蟒钛业股份有限公司 | A method of effectively avoiding titanium liquid premature hydrolysis |
| CN108178190B (en) * | 2018-03-08 | 2019-11-29 | 四川龙蟒钛业股份有限公司 | A method of improving disk filtration efficiency and ferrous sulfate quality |
| CN108408768A (en) * | 2018-04-25 | 2018-08-17 | 四川龙蟒钛业股份有限公司 | A method of efficiently using metatitanic acid washing filtrate |
| CN108408768B (en) * | 2018-04-25 | 2019-11-29 | 四川龙蟒钛业股份有限公司 | A method of effective use metatitanic acid washs filtrate |
| CN110510589A (en) * | 2019-09-10 | 2019-11-29 | 湖北祥云(集团)化工股份有限公司 | A kind of Wet-process Phosphoric Acid Production method and production system |
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| CN103213961B (en) | 2014-09-17 |
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Address after: 441100 Yujiahu, Xiangcheng District, Xiangyang City, Hubei Province Patentee after: Xiangyang Zedong Chemical Group Co.,Ltd. Address before: No. 1 Tianshun Avenue, Yujiahu Industrial Park, Xiangcheng Economic Development Zone, Xiangfan City, Hubei Province, 441001 Patentee before: XIANGYANG ZEDONG CHEMICAL Co.,Ltd. |