CN102807232A - System for evaporating liquid ammonia by using ammonium phosphate slurry concentration and waste hot water - Google Patents
System for evaporating liquid ammonia by using ammonium phosphate slurry concentration and waste hot water Download PDFInfo
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- CN102807232A CN102807232A CN2012103095682A CN201210309568A CN102807232A CN 102807232 A CN102807232 A CN 102807232A CN 2012103095682 A CN2012103095682 A CN 2012103095682A CN 201210309568 A CN201210309568 A CN 201210309568A CN 102807232 A CN102807232 A CN 102807232A
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- ammonia
- hot water
- ammonium phosphate
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- mixing condenser
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention relates to a system for evaporating liquid ammonia by using ammonium phosphate slurry concentration and waste hot water. The system comprises a liquid ammonia storage tank, a liquid ammonia evaporator, a gas ammonia buffer tank, a mixing condenser and a circulating pool, wherein the liquid ammonia storage tank is communicated with the gas ammonia buffer tank through an evaporation part of the liquid ammonia evaporator; the gas ammonia buffer tank is externally connected with an ammonia vapor utilization procedure; gas out of a flash chamber in a ammonium phosphate slurry concentration procedure is communicated with the mixing condenser; and the mixing condenser is communicated between the circulating pool and a heating part of the liquid ammonia evaporator. The system can effectively recycle heat energy by mixing ammonium phosphate slurry concentration and the waste hot water of the mixing condenser to evaporate the liquid ammonia, also can save electricity, water and energy and reduce environmental pollution, and has a high heat energy recovery rate.
Description
Technical field
The invention belongs to ammonium phosphate is the waste heat utilization technology in the production technology, is a kind of system that utilizes ammonium phosphate slip thickened waste hot water evaporation ammonium phosphate raw materials for production liquefied ammonia specifically.
Background technology
At ammonium phosphate is in the production technology, generally adopts in gas ammonia and the phosphoric acid and generation ammonium phosphate slip.The tradition by liquid ammonia storage tank to liquefied ammonia vaporizer feed flow ammonia; Generate gas ammonia to the liquefied ammonia heating and gasifying indirectly with steam; 1kg liquefied ammonia flashes to gas ammonia need consume the 0.5kg LP steam; LP steam mostly adopts and burns coal heating makes to water, has not only consumed a large amount of coals and water resources, and the flue gas that produces during coal combustion has caused environmental pollution.
In addition, when the ammonium phosphate slip concentrated, flashing chamber was discharged high temperature waste hot gas and is taked cooling tower to force the back discharging, waste hot gas heat energy is not utilized, and has not only wasted heat energy capable of using, and has thermal pollutions such as water, vapour, had increased the consumption of water, electricity.
Summary of the invention
The heat energy that concentrates the mixing condenser spent hot water to existing ammonium phosphate slip is wasted always; Coal combustion generation steam evaporates liquefied ammonia again simultaneously; Have environmental pollution, the defective that wastes energy the invention provides a kind of heat energy evaporation liquefied ammonia that can effective recycling ammonium phosphate slip concentrates the mixing condenser spent hot water; Can economize on electricity again, water saving, energy-conservation and reduce environmental pollution, heat energy recovery rate is high utilizes ammonium phosphate slip thickened waste hot water evaporated liquor ammonia system.
In order to achieve the above object; The technical scheme that the present invention adopts is: a kind of ammonium phosphate slip thickened waste hot water evaporated liquor ammonia system of utilizing; It is characterized in that comprising liquid ammonia storage tank, liquefied ammonia vaporizer, gas ammonia surge tank, mixing condenser and circulating water pool; Liquid ammonia storage tank is communicated with the gas ammonia surge tank through the evaporation part of liquefied ammonia vaporizer; The external ammonia steam of gas ammonia surge tank uses operation, the ammonium phosphate slip enrichment process flashing chamber connection mixing condenser of giving vent to anger, and mixing condenser is communicated between the heating part of circulating water pool and liquefied ammonia vaporizer.
Be communicated with through cooling tower between the heating part of said liquefied ammonia vaporizer and the circulating water pool, circulating water pool is communicated with the mixing condenser top through the water circulating pump water inlet, and mixing condenser bottom water outlet is communicated with the heating part of liquefied ammonia vaporizer through hot tub, hot water pump.
Said ammonium phosphate slip enrichment process flashing chamber is given vent to anger and is communicated with the mixing condenser bottom.Go against the stream with water coolant from bottom to top in mixing condenser from the secondary vapour of II effect flashing chamber in the ammonium phosphate slip enrichment process, be convenient to fully contact and the cooling condensation.
Said liquefied ammonia vaporizer is a shell U-shaped tubular evaparator, and liquid ammonia storage tank is communicated with the shell side of liquefied ammonia vaporizer, and hot water pump is communicated with the tube side of liquefied ammonia vaporizer.During operation, the spent hot water walks shell side, and liquefied ammonia is walked tube side, the anti-spent hot water's corrosion of vaporizer, and long service life, heat-transfer effect is good.
Said mixing condenser stretches into hot tub mouth of pipe height and is lower than hot water pump and stretches into hot tub mouth of pipe height.The difference of coat height can effectively be guaranteed the fluid-tight effect greater than 300mm.
Said hot water pump is nonmetal chemical industry corrosion resisting centrifugal pump, further improves the system component corrosion resistance nature.
The invention has the beneficial effects as follows: from ammonium phosphate slip enrichment process II imitate the flashing chamber outflow temperature be secondary vapour about 85 ℃ after the mixing condenser condensation becomes the spent hot water about 76 ℃ to the hot water collecting tank; Deliver to the liquefied ammonia vaporizer through hot water pump; Evaporation liquefied ammonia temperature reduces to that back to cooling tower further cools to about 30 ℃ about 55 ℃; To the cold water collecting tank; Deliver to mixing condenser by water circulating pump then, steam meets with the water coolant adverse current and the condensation that fully contacts, lowers the temperature from bottom to top in mixing condenser, so circulation.Get in the liquefied ammonia vaporizer shell side from the liquefied ammonia in the liquid ammonia storage tank; Being made liquefied ammonia flash to pressure by the spent hot water's indirect heating in the tube side is the saturated ammonia steam about 0.5MPa, and sends into the gas ammonia surge tank through the gas ammonia pipeline and go in the required ammonium phosphate then and operation.The present invention has fully recycled the concentrated mixing condenser spent hot water's of ammonium phosphate slip heat energy; Energy efficient; Reduce thermal pollution, improve production environment, solved evaporation 1000kg liquefied ammonia and need consume 64.3kg standard coal equivalent and the wasting of resources of 500kg soft and coal-fired problem of environmental pollution.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: liquid ammonia storage tank 1, liquefied ammonia vaporizer 2, gas ammonia surge tank 3, cooling tower 4, circulating water pool 5, water circulating pump 6, mixing condenser 7, hot tub 8, hot water pump 9.
Embodiment
Below in conjunction with accompanying drawing the present invention is described further.
Shown in Figure 1, a kind of ammonium phosphate slip thickened waste hot water evaporated liquor ammonia system of utilizing comprises liquid ammonia storage tank 1, liquefied ammonia vaporizer 2, gas ammonia surge tank 3, cooling tower 4, circulating water pool 5, water circulating pump 6, mixing condenser 7, hot tub 8 and hot water pump 9.Liquefied ammonia vaporizer 2 is a shell U-shaped tubular evaparator; Liquid ammonia storage tank 1 is communicated with gas ammonia surge tank 3 through the tube side of liquefied ammonia vaporizer 2; Gas ammonia surge tank 3 external ammonia steam use operation; Ammonium phosphate slip enrichment process II effect flashing chamber is given vent to anger and is communicated with mixing condenser 7 bottoms, and mixing condenser 7 is communicated between the shell side of circulating water pool 5 and liquefied ammonia vaporizer 2; Be communicated with through cooling tower 4 between the shell side of liquefied ammonia vaporizer 2 and the circulating water pool 5, circulating water pool 5 is communicated with mixing condensers 7 tops through water circulating pump 6 water inlets, and mixing condenser 7 bottom water outlets are communicated with the shell side of liquefied ammonia vaporizers 2 through hot tub 8, hot water pump 9; Mixing condenser 7 stretches into hot tub 8 mouth of pipe height and is lower than hot water pump 9 and stretches into hot tub 8 mouth of pipe height; Hot water pump 9 is nonmetal chemical industry corrosion resisting centrifugal pump.
Claims (6)
1. one kind is utilized ammonium phosphate slip thickened waste hot water evaporated liquor ammonia system; It is characterized in that: comprise liquid ammonia storage tank, liquefied ammonia vaporizer, gas ammonia surge tank, mixing condenser and circulating water pool; Liquid ammonia storage tank is communicated with the gas ammonia surge tank through the evaporation part of liquefied ammonia vaporizer; The external ammonia steam of gas ammonia surge tank uses operation, the ammonium phosphate slip enrichment process flashing chamber connection mixing condenser of giving vent to anger, and mixing condenser is communicated between the heating part of circulating water pool and liquefied ammonia vaporizer.
2. a kind of ammonium phosphate slip thickened waste hot water evaporated liquor ammonia system of utilizing according to claim 1; It is characterized in that: be communicated with through cooling tower between the heating part of said liquefied ammonia vaporizer and the circulating water pool; Circulating water pool is communicated with the mixing condenser top through the water circulating pump water inlet, and mixing condenser bottom water outlet is communicated with the heating part of liquefied ammonia vaporizer through hot tub, hot water pump.
3. a kind of ammonium phosphate slip thickened waste hot water evaporated liquor ammonia system of utilizing according to claim 1 is characterized in that: said ammonium phosphate slip enrichment process flashing chamber is given vent to anger and is communicated with the mixing condenser bottom.
4. a kind of ammonium phosphate slip thickened waste hot water evaporated liquor ammonia system of utilizing according to claim 1 and 2; It is characterized in that: said liquefied ammonia vaporizer is a shell U-shaped tubular evaparator; Liquid ammonia storage tank is communicated with the shell side of liquefied ammonia vaporizer, and hot water pump is communicated with the tube side of liquefied ammonia vaporizer.
5. a kind of ammonium phosphate slip thickened waste hot water evaporated liquor ammonia system of utilizing according to claim 2 is characterized in that: said mixing condenser stretches into hot tub mouth of pipe height and is lower than hot water pump and stretches into hot tub mouth of pipe height.
6. a kind of ammonium phosphate slip thickened waste hot water evaporated liquor ammonia system of utilizing according to claim 2, it is characterized in that: said hot water pump is nonmetal chemical industry corrosion resisting centrifugal pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103095682A CN102807232A (en) | 2012-08-28 | 2012-08-28 | System for evaporating liquid ammonia by using ammonium phosphate slurry concentration and waste hot water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103095682A CN102807232A (en) | 2012-08-28 | 2012-08-28 | System for evaporating liquid ammonia by using ammonium phosphate slurry concentration and waste hot water |
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| CN102807232A true CN102807232A (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012103095682A Pending CN102807232A (en) | 2012-08-28 | 2012-08-28 | System for evaporating liquid ammonia by using ammonium phosphate slurry concentration and waste hot water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104492105A (en) * | 2014-12-08 | 2015-04-08 | 广西鹿寨化肥有限责任公司 | Method for evaporating liquid ammonia by virtue of waste heat of tail gas from granulation of diammonium phosphate |
| CN107892287A (en) * | 2017-12-10 | 2018-04-10 | 什邡市长丰化工有限公司 | A kind of production method of water-soluble poly ammonium phosphate liquid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202087068U (en) * | 2011-03-15 | 2011-12-28 | 合肥宁垣工程技术有限责任公司 | Energy-saving liquid ammonia evaporating device |
-
2012
- 2012-08-28 CN CN2012103095682A patent/CN102807232A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202087068U (en) * | 2011-03-15 | 2011-12-28 | 合肥宁垣工程技术有限责任公司 | Energy-saving liquid ammonia evaporating device |
Non-Patent Citations (2)
| Title |
|---|
| 沙德宏: "30kt/a料浆浓缩法磷酸一铵装置的扩能改造", 《化肥工业》 * |
| 魏会林等: "料浆法磷铵生成实现废水零排放", 《磷肥与复肥》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104492105A (en) * | 2014-12-08 | 2015-04-08 | 广西鹿寨化肥有限责任公司 | Method for evaporating liquid ammonia by virtue of waste heat of tail gas from granulation of diammonium phosphate |
| CN107892287A (en) * | 2017-12-10 | 2018-04-10 | 什邡市长丰化工有限公司 | A kind of production method of water-soluble poly ammonium phosphate liquid |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20121205 |