CN103213961B - Closed cyclic utilization method for production water of monoammonium phosphate - Google Patents

Closed cyclic utilization method for production water of monoammonium phosphate Download PDF

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CN103213961B
CN103213961B CN201210154933.7A CN201210154933A CN103213961B CN 103213961 B CN103213961 B CN 103213961B CN 201210154933 A CN201210154933 A CN 201210154933A CN 103213961 B CN103213961 B CN 103213961B
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water
pump
sewage
washing
clear
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CN103213961A (en
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耿崇显
郭勇
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XIANGYANG ZEDONG CHEMICAL CO Ltd
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XIANGYANG ZEDONG CHEMICAL CO Ltd
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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

A kind of monoammonium phosphate water of productive use closed circulation is utilized method
Technical field
The present invention relates to 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, monoammonium phosphate is produced fluorine containing waste water, the dust-laden sewage producing, the water of condensation that overhauls sewage, II effect flashing chamber, is directly discharged to sewage works, outer row after the comprehensive treating process of employing lime; And the water that 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, washing extraction tank tail gas are used, rinse the operation such as water, the water that washing drying tower tail gas is used that disk filter uses and all use water one time, general monoammonium phosphate is produced approximately 20 tons of ton water consumptions.
Above-mentioned monoammonium phosphate production waste utilizes technique to have following deficiency.
1, monoammonium phosphate production water consumption is high, and the utilization ratio of water resources is low;
2, production waste is directly discharged to sewage works, outer row after the comprehensive treating process of employing lime, and blowdown flow rate is large, does not reach the technical requirements of environmental protection to water quality;
3, sewage disposal expense is high, and phosphor resource and water resource waste are serious.
Summary of the invention
Utilize the deficiency of method for overcoming existing monoammonium phosphate production waste, 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, technique thinking of the present invention is: utilize 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; Meanwhile, supplement a water to clear water pond for recovering, moisture five tunnels of clear water pond for recovering are 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; Extraction tank tail gas is removed to wash in the second tunnel, and the sewage after washing enters sewage settling bowl; Third Road removes to wash drying tower tail gas, and then concentrates the moisturizing of production system as neutralization; Si goes on road to water cooling tower moisturizing, supplements the moisture of water cooling tower evaporation and blowdown loss, reclaims the water of condensation of II effect flashing chamber, goes to water cooling tower moisturizing, and the sewer of water cooling tower directly goes to ball mill moisturizing; Wu goes on road to rinse disk filter San Xi district, forms and filters three washing filtrates, and three washing filtrates remove sedimentation overflow groove.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 sedimentation overflow groove again, clear liquor in groove enters and rushes cloth tank through overflow, upper clear supernate is as the punch plate district that rushes water distribution and go to rinse disk filter, generation punch plate phosphogypsum plants water and enters sedimentation overflow groove, and on cloth, water removes thick stock tank; Sedimentation overflow groove and rushing after the liquid separation solid formation in cloth tank, the thick slurry in bottom flows into thick stock tank, squeezes into disk filter Er Xi district wash as two wash waters, produces two washing filtrates; Two washing filtrates are squeezed into disk filter Yi Xi district as a wash water and are washed, and 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 the not outer row of closed circulation.
The present invention includes following operation.
(a) supplement a water to clear water pond for recovering;
(b) reclaim 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 clear water pond for recovering;
(c) a part of clear water of 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, carries out cooling to these equipment;
(d) a part of clear water of clear water pond for recovering removes to extract tail gas washing tower, for washing the fluorine of extraction tank tail gas, forms fluorine containing waste water, then reclaims fluorine containing waste water to sewage settling bowl;
(e) a part of clear water of clear water pond for recovering is delivered to drying tower, for washing drying tower tail gas, wash away the monoammonium phosphate dust containing in tail gas, during this part dry wash water is got to and concentration systems, gets back in product production system and recycle;
(f) a part of clear water of clear water pond for recovering is delivered to water cooling tower, supplements the water of water cooling tower evaporation and blowdown loss;
(g) water of condensation of recovery II effect flashing chamber, goes to water cooling tower moisturizing, and the sewer of water cooling tower is directly sent to ball mill and entered production system;
(h) a part of water of clear water pond for recovering, cleans disk filter San Xi district as three wash waters, and washings is out called three washing filtrates;
(i) three washing filtrates are made sedimentation overflow groove by three filter wash liquid pumps, and cell body upper liquid is flowed into and rushed 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 Er Xi district by thick stock pump, rinses filter disc as two wash waters, and liquid is out called two washing filtrates;
(k) two washing filtrates are got to disk filter Yi Xi district by two filter wash liquid pumps, rinse filter disc as a wash water, and liquid is out called a washing filtrate, and a washing filtrate removes extraction tank;
(l) reclaim for clearing up the maintenance sewage of pipeline and fluorine containing waste water to sewage settling bowl;
(m) clear liquid on sewage settling bowl top, is delivered to 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) upper clear supernate of rushing cloth tank is used as rushing water distribution, to rush water distribution and squeeze into the punch plate district of disk filter with rushing cloth water pump, the liquid after washing is called punch plate phosphogypsum sewage, and punch plate phosphogypsum sewage is divided on cloth water and plants water, on cloth, water removes thick stock tank, plants water and removes sedimentation overflow groove;
(p) the thick slurry in bottom that rushes cloth tank flows into thick stock tank, and the liquid in thick stock tank goes to disk filter Er Xi district, carries out recycle.
The present invention compared with prior art, has solved and has perplexed for a long time the monoammonium phosphate manufacturing enterprise sewage water yield
Administer difficult a great problem greatly,, technological process is simple, good sewage processing effect, processing unit and less investment, personnel labor intensity is low, and water use efficiency is high, effectively saving water resource, monoammonium phosphate product water consumption is down to 2.5 ~ 2.8 tons of/ton of products by 20 tons of left and right, realizes the closed circulation utilization of monoammonium phosphate water of productive use and sewage zero-discharge.
Brief description of the drawings
Fig. 1 is schema of the present invention.
Embodiment
As shown in Figure 1, the present invention includes following operation.
(a) supplement a water to clear water pond for recovering;
(b) reclaim 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 clear water pond for recovering;
(c) a part of clear water of 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, carries out cooling to these equipment;
(d) a part of clear water of clear water pond for recovering removes to extract tail gas washing tower, for washing the fluorine of extraction tank tail gas, forms fluorine containing waste water, then reclaims fluorine containing waste water to sewage settling bowl;
(e) a part of clear water of clear water pond for recovering is delivered to drying tower, for washing drying tower tail gas, wash away the monoammonium phosphate dust containing in tail gas, during this part dry wash water is got to and concentration systems, gets back in product production system and recycle;
(f) a part of clear water of clear water pond for recovering is delivered to water cooling tower, supplements the moisture of water cooling tower evaporation and blowdown loss;
(g) water of condensation of recovery II effect flashing chamber, goes to water cooling tower moisturizing, and the sewer of water cooling tower is directly sent to ball mill and entered production system;
(h) a part of water of clear water pond for recovering, cleans disk filter San Xi district as three wash waters, and washings is out called three washing filtrates;
(i) three washing filtrates are made sedimentation overflow groove by three filter wash liquid pumps, and cell body upper liquid is flowed into and rushed 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 Er Xi district by thick stock pump, rinses filter disc as two wash waters, and liquid is out called two washing filtrates;
(k) two washing filtrates are got to disk filter Yi Xi district by two filter wash liquid pumps, rinse filter disc as a wash water, and liquid is out called a washing filtrate, and a washing filtrate removes extraction tank;
(l) reclaim for clearing up the maintenance sewage of pipeline and fluorine containing waste water to sewage settling bowl;
(m) clear liquid on sewage settling bowl top, is delivered to 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) upper clear supernate of rushing cloth tank is used as rushing water distribution, to rush water distribution and squeeze into the punch plate district of disk filter with rushing cloth water pump, the liquid after washing is called punch plate phosphogypsum sewage, and punch plate phosphogypsum sewage is divided on cloth water and plants water, on cloth, water removes thick stock tank, plants water and removes sedimentation overflow groove;
(p) the thick slurry in bottom that rushes cloth tank flows into thick stock tank, and the liquid in thick stock tank goes to disk filter Er Xi district, carries out recycle.
Operation of the present invention (a) and (b) in, reclaim for vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, dredge pump, gas blower and other phosphorus ammonium component cooling water, then supplement a water according to water consumption to clear water pond for recovering.
In operation of the present invention (c), (d), (e), (f), (h), utilized for the first time by clear water pond for recovering clear water Fen Wu road out, 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 tail gas of extraction tank is removed to wash in the second tunnel, after water and tail gas counter current contact, generates fluorine containing waste water, decontaminated water settling bowl, the upper clear supernate of sewage settling bowl turns back in 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 tail gas washes with water, generates dust-laden sewage, in directly going and concentration systems, reclaims product; Si goes on road to water cooling tower moisturizing, supplements the moisture of water cooling tower evaporation and blowdown loss; Wu goes on road to rinse disk filter San Xi district, forms and filters three washing filtrates, and three washing filtrates remove sedimentation overflow groove, and liquid two portions of sedimentation overflow groove utilize, and the not outer row of closed circulation, realizes sewage zero-discharge.
In operation of the present invention (g), except giving water cooling tower moisturizing, also reclaim the water of condensation of II effect flashing chamber from clear water pond for recovering, go to water cooling tower moisturizing, the sewer of water cooling tower enters production system, directly goes to ball mill moisturizing.
Operation of the present invention (i), in (j), (k), (l), (m), use three wash waters of clear water after disk filter, generate three washing filtrates, pump into again sedimentation overflow groove, clear liquid part goes to rinse the punch plate district of disk filter, and thick slurry part goes to rinse disk filter Er Xi district, and two washing filtrates out go to rinse disk filter Yi Xi district again, a washing filtrate out removes extraction tank, enters into production system.
In operation of the present invention (n), the thick slurry in bottom of sewage settling bowl, can not be re-used as washing water utilization, but contain portioned product, and not outer row, carries and remove extraction tank, enters into production system.
In operation of the present invention (o), (p), the upper liquid that rushes cloth tank is comparatively clean, use as rushing water distribution, pump into the punch plate district of disk filter, liquid after washing is called punch plate phosphogypsum sewage, punch plate phosphogypsum sewage is divided on cloth water and plants water, on cloth, water removes thick stock tank, plant water and remove sedimentation overflow groove, liquid flooding in groove enters to rush cloth tank, sedimentation overflow groove all flows into thick stock tank with the bottom liquid that rushes cloth tank, and the liquid in thick stock tank goes to disk filter Er Xi district, carries out recycle; In this process, sedimentation overflow groove, rush cloth tank, disk filter punch plate district and form a recycle system, by thick stock pump, thick slurry is shifted out, remove to rinse disk filter, utilize the clear liquid moisturizing in sewage settling bowl, reach balance with this.

Claims (1)

1. monoammonium phosphate water of productive use closed circulation is utilized a method, it is characterized in that: comprise following operation:
(a) supplement a water to clear water pond for recovering;
(b) reclaim the water coolant that is used for vacuum pump, shurry pump, thick stock pump, sump pump, filtrate pump, water cooling tower pump, gas blower and other phosphorus ammonium equipment to clear water pond for recovering;
(c) a part of clear water of 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, carries out cooling to these equipment;
(d) a part of clear water of clear water pond for recovering removes to extract tail gas washing tower, for washing the fluorine of extraction tank tail gas, forms fluorine containing waste water, then reclaims fluorine containing waste water to sewage settling bowl;
(e) a part of clear water of clear water pond for recovering is delivered to drying tower, for washing drying tower tail gas, wash away the monoammonium phosphate dust containing in tail gas, during this part dry wash water is got to and concentration systems, gets back in product production system and recycle;
(f) a part of clear water of clear water pond for recovering is delivered to water cooling tower, supplements the water of water cooling tower evaporation and blowdown loss;
(g) water of condensation of recovery II effect flashing chamber, goes to water cooling tower moisturizing, and the sewer of water cooling tower is directly sent to ball mill and entered production system;
(h) a part of water of clear water pond for recovering, cleans disk filter San Xi district as three wash waters, and washings is out called three washing filtrates;
(i) three washing filtrates are made sedimentation overflow groove by three filter wash liquid pumps, and cell body upper liquid is flowed into and rushed 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 Er Xi district by thick stock pump, rinses filter disc as two wash waters, and liquid is out called two washing filtrates;
(k) two washing filtrates are got to disk filter Yi Xi district by two filter wash liquid pumps, rinse filter disc as a wash water, and liquid is out called a washing filtrate, and a washing filtrate removes extraction tank;
(l) reclaim for clearing up the maintenance sewage of pipeline and fluorine containing waste water to sewage settling bowl;
(m) clear liquid on sewage settling bowl top, is delivered to 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) upper clear supernate of rushing cloth tank is used as rushing water distribution, to rush water distribution and squeeze into the punch plate district of disk filter with rushing cloth water pump, the liquid after washing is called punch plate phosphogypsum sewage, and punch plate phosphogypsum sewage is divided on cloth water and plants water, on cloth, water removes thick stock tank, plants water and removes sedimentation overflow groove;
(p) the thick slurry in bottom that rushes cloth tank flows into thick stock tank, and the liquid in thick stock tank goes to disk filter Er Xi district, carries out recycle.
CN201210154933.7A 2012-05-18 2012-05-18 Closed cyclic utilization method for production water of monoammonium phosphate Active CN103213961B (en)

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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
CN104477863B (en) * 2014-11-18 2016-04-13 瓮福(集团)有限责任公司 A kind of method reducing phosphoric acid by wet process fresh water usage quantity
CN107522335B (en) * 2017-07-31 2021-04-20 湖北祥云(集团)化工股份有限公司 Comprehensive utilization system for phosphoric acid and phosphate wastewater
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
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
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

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