CN102531260A - Steam stripping technology of high-concentration ammonia nitrogen effluent - Google Patents
Steam stripping technology of high-concentration ammonia nitrogen effluent Download PDFInfo
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- CN102531260A CN102531260A CN2011104462805A CN201110446280A CN102531260A CN 102531260 A CN102531260 A CN 102531260A CN 2011104462805 A CN2011104462805 A CN 2011104462805A CN 201110446280 A CN201110446280 A CN 201110446280A CN 102531260 A CN102531260 A CN 102531260A
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Abstract
The invention provides a steam stripping technology of high-concentration ammonia nitrogen effluent, which includes: a treated effluent led out from the bottom of steam stripping tower is performed with primary flash evaporation or secondary flash evaporation, and the ammonia nitrogen effluent absorbing heat flows into an effluent storage tank, then is conveyed into a pipeline mixer to be mixed with alkali liquor by a feeding pump of the steam stripping tower and enters an effluent inlet distribution tube of the steam stripping tower; b low-pressure steam enters the steam stripping tower through the low-pressure steam inlet distribution tube; c transferring of heat and quality in the steam stripping tower is performed between the low-pressure steam and the ammonia nitrogen effluent entering through the effluent inlet distribution tube; d gas-phase flow is led out from the top of the steam stripping tower and condensed through a reflux condenser, a part of ammonia water returns to the steam stripping tower as reflux liquid, the other part of the ammonia water is conveyed outside as by-product, and by-product of ammonia water is obtained, or the flux condenser adopts the condensing method of partial condensation, and ammoniac by-product of gaseous ammonia is led out from the top of a reflux tank. The steam stripping technology of high-concentration ammonia nitrogen is low in equipment investment, simple in process and stable in working.
Description
Technical field
The present invention relates to a kind of ammonia nitrogen waste water treatment method, particularly relate to a kind of high-concentration ammonia nitrogenous wastewater stripping process.
Background technology
Industries such as petrochemical industry, metallurgy, pharmacy, food usually can produce a large amount of ammonia nitrogen waste waters; Usually also contain negatively charged ion such as positively charged ions such as calcium magnesium and sulfate radical, chlorine root, carbonate in this type waste water; Tradition steam stripped stripping technique; Recommend matter with low pressure water vapor as gas, adopt packing tower or tray column that the gas-to-liquid contact interface is provided, to reach the isolating purpose of component.Calcium ions and magnesium ions in the ammonia nitrogen waste water and corresponding negatively charged ion; In heating is under the condition of steam stripped, and very easily generation precipitates fouling and stops up filler, or on float valve, bubble-cap or the sieve plate of tray column, forms the dirt layer; Make the stuck or clogging of screen of float valve (or bubble-cap), and can't continue operation.Therefore conventional fillers or board-like stripping tower technology only are suitable for non-fouling system occasion.
Traditional in addition stripping process adopts high temperature waste water residual heat up to standard at the bottom of shell-and-tube or the plate-type heat exchanger regenerating column usually, reducing the energy consumption of technological process, but for the waste water system, because its fouling tendency is serious, therefore usually influences the long-period stable operation of device.
The patent No. is that 201010123251.0 invention relates to a kind of heat pump flash distillation stripping deamination method; After the steam that is rich in ammonia nitrogen of this method after with the stripping deamination absorbs through the absorption tower; Recycle after the steam process heat pump set supercharging that purifies; Direct heating pre-treatment high ammonia-nitrogen wastewater after the vacuum flashing unit flash distillation that waste water process Venturi behind the deamination and liquid-ring vacuum pump are formed; This invention is compared with traditional deamination steam consumption quantity technology big, that running cost is high, aspect energy-conservation, consumption reduction, has effect remarkable, in ammonia nitrogen waste water is handled, has wider application market prospect and huge application potential.
But the patent No. is that 201010123251.0 invention relates to a kind of heat pump flash distillation stripping deamination method, and its stripping tower adopts packing tower or tray column, and as adopting packing tower, system's fouling is prone to cause filler to stop up; As adopt tray column, system's fouling also can cause float valve, bubble-cap is stuck or clogging of screen; In case occur stuck or obstruction, then processing efficiency sharply descends, job insecurity, even can not satisfy processing requirements.
Summary of the invention
The purpose of this invention is to provide a kind of high-concentration ammonia nitrogenous wastewater stripping process, this high-concentration ammonia nitrogenous wastewater stripping process, technology is simple, and facility investment is few, and working process is stable.
In order to achieve the above object, high-concentration ammonia nitrogenous wastewater stripping process of the present invention the steps include:
The waste water of the processing that draw a, stripping tower bottom is through one-level flash distillation or double flash evaporation; Carry out the vapour-liquid direct heat exchange with undressed ammonia nitrogen waste water through one-level injection or two-stage injection; Ammonia nitrogen waste water behind the absorption heat gets into the waste water storage tank, is delivered to the waste water import distribution pipe of line mixer and the mixed back entering of alkali lye stripping tower again by the stripping tower feeding pump;
B, LP steam are sent stripping tower to by the LP steam import distribution pipe of stripping tower;
C, LP steam and the ammonia nitrogen waste water that gets into through waste water import distribution pipe carry out the transmission of heat and quality in stripping tower; Again through circulation at the bottom of the tower, stripping section follows and three grades of circulations of rectifying section round-robin; The liquid phase of each grade working cycle is sprayed by recycle pump pressurization, liquid phase distributor; Fully carry out the transmission of heat and quality with the gas phase in the stripping tower, separate to reach the ammonia nitrogen waste water component through the riser rising;
D, stripping cat head airbleed flow mutually, and through the reflux exchanger condensation, a part of ammoniacal liquor returns stripping tower as phegma; Another part is seen off out-of-bounds as sub product; Obtain sub product ammoniacal liquor, perhaps reflux exchanger adopts the partial condensation mode, and ammoniated sub product gas ammonia is drawn from the return tank top.
Because in the high-concentration ammonia nitrogenous wastewater stripping process of the present invention, do not have absorption tower and saturator, make facility investment little, technology is simple.
Described high-concentration ammonia nitrogenous wastewater stripping process is characterized in that: alkali lye is NaOH solution or Ca (OH)
2Solution.
Described high-concentration ammonia nitrogenous wastewater stripping process; It is characterized in that: stripping tower comprises stripping tower body, waste water import distribution pipe, seal pot, riser, liquid phase distributor and LP steam import distribution pipe, and the stripping tower body is a vertical tower body, and its top is provided with gaseous phase outlet; The bottom is provided with leakage fluid dram; LP steam import distribution pipe and waste water import distribution pipe are installed in the stripping tower body, and waste water import distribution pipe is installed in the top of LP steam import distribution pipe, and seal pot, riser and liquid phase distributor are installed in the stripping tower body; Riser is set on the seal pot, and liquid phase distributor is positioned at the riser top.Because this stripping tower is not owing to adopt filler or tower tray; Only adopt seal pot and riser; Under the sprinkling of liquid phase distributor, can reach the efficient efficient of removing ammonia, and can guarantee that stripping tower does not receive the influence of the easy fouling of material system and keeps continuous, stable operation.
Described high-concentration ammonia nitrogenous wastewater stripping process is characterized in that: one-level is sprayed or two-stage is sprayed the injector that adopted for being the water-jet exhauster of actuating fluid with the ammonia nitrogen waste water.
High-concentration ammonia nitrogenous wastewater stripping process of the present invention, technology is simple, and facility investment is few, and working process is stable.
Description of drawings
Fig. 1 is the process flow diagram of the embodiment of the invention.
Fig. 2 sprays the process flow diagram that extracts ammoniacal liquor through secondary double flash evaporation, two-stage.
Fig. 3 sprays the process flow diagram that extracts gaseous ammonia through secondary double flash evaporation, two-stage.
Embodiment
The explanation of Fig. 1 mark: one-level injector 1 goes out water pump 3, one-level flash tank 4, waste water storage tank 6, stripping tower feeding pump 8; Stripping tower 9, line mixer 10, reflux exchanger 11, return tank 12, stripping section recycle pump 13; Rectifying section recycle pump 14, recycle pump 15 at the bottom of the tower, reflux pump 16, trip valve 17, stripping tower body 90; Liquid phase distributor 91, waste water import distribution pipe 92, riser 93, seal pot 94, LP steam import distribution pipe 95; LP steam A, alkali lye B, ammonia nitrogen waste water C, waste discharge D reclaims ammoniacal liquor E.
The explanation of Fig. 2 mark: two-stage injection device 2, two-stage flash jar 5 sprays feeding pump 7.
The explanation of Fig. 3 mark: reclaim gas ammonia F.
The embodiment of high-concentration ammonia nitrogenous wastewater stripping process of the present invention the steps include:
The waste water of the processing that draw a, stripping tower 9 bottoms is through one-level flash distillation or double flash evaporation; Carry out the vapour-liquid direct heat exchange with undressed ammonia nitrogen waste water through one-level injection or two-stage injection; Ammonia nitrogen waste water behind the absorption heat gets into waste water storage tank 6, is delivered to the waste water import distribution pipe 92 of line mixer 10 and the mixed back entering of alkali lye stripping tower 9 again by stripping tower feeding pump 8;
B, LP steam are sent stripping tower 9 to by the LP steam import distribution pipe 95 of stripping tower 9;
C, LP steam and the ammonia nitrogen waste water that gets into through waste water import distribution pipe 92 carry out the transmission of heat and quality in stripping tower 9; Again through circulation at the bottom of the tower, stripping section follows and three grades of circulations of rectifying section round-robin; The liquid phase of each grade working cycle is sprayed by recycle pump pressurization, liquid phase distributor 91; Fully carry out the transmission of heat and quality with the air-flow that rises through riser 93 in the stripping tower 9, separate to reach the ammonia nitrogen waste water component;
Vapor phase stream is drawn on d, stripping tower 9 tops; Through reflux exchanger 11 condensations; Part ammoniacal liquor returns stripping tower 9 as phegma, and another part is seen off out-of-bounds as sub product, obtains sub product ammoniacal liquor; Perhaps reflux exchanger 11 adopts the partial condensation mode, and ammoniated sub product gas ammonia is drawn from return tank 12 tops.
Because in the high-concentration ammonia nitrogenous wastewater stripping process of the present invention, do not have absorption tower and saturator, make facility investment little, technology is simple.
The alkali lye that is adopted in the high-concentration ammonia nitrogenous wastewater stripping process of the present invention is NaOH solution or Ca (OH)
2Solution.
Embodiment 1
One high-concentration ammonia nitrogenous wastewater, ammonia-nitrogen content: 10000 mg/l, 35 ℃ of temperature, water yield 20t/h.
Processing requirements: water outlet ammonia content at the bottom of the tower＜15 mg/l, cat head by-product 20% ammoniacal liquor.
Referring to Fig. 2, adopt the high-concentration ammonia nitrogenous wastewater stripping process of double flash evaporation recovery waste heat: high-concentration ammonia nitrogenous wastewater is taken out the flash steam that attracts from two-stage flash jar 5 through two-stage injection device 2, and wastewater temperature is brought up to and got into waste water storage tank 6 hypomeres about 60 ℃; Spray the laggard one-level injector 1 of feeding pump 7 pressurize by one-level again, take out the flash steam that attracts from one-level flash tank 4, wastewater temperature is brought up to and is got into waste water storage tank 6 epimeres about 82 ℃; Get into stripping tower 9 through stripping tower feeding pump 8, LP steam gets into stripping towers 9 by stripping tower body 90 bottom seal pots 94 and stripping tower 9 interior LP steam import distribution pipes 95 respectively, and gas phase rises through riser 93; Reverse contact of liquid under with spraying through liquid phase distributor 91; Carry out heat and mass transfer, after the multi-stage gas-liquid balance, draw vapor phase stream by stripping tower 9 tops; Be cooled to 35 ℃ through reflux exchanger 11; Obtain 20% ammoniacal liquor, a part of ammoniacal liquor returns stripping tower 9 as phegma, and another part is seen off out-of-bounds as sub product.
102 ℃ of 9 ends of stripping tower waste water (ammonia content＜15 mg/l) temperature of discharging reclaim heat through the flash distillation of double flash evaporation jar, go out about 60 ℃ of the wastewater temperatures of waste water storage tank 6, after being cooled to normal temperature, discharge out-of-bounds.
One high-concentration ammonia nitrogenous wastewater, ammonia-nitrogen content: 20000 mg/l, 70 ℃ of temperature, water yield 10t/h.
Processing requirements: water outlet ammonia content at the bottom of the tower＜15 mg/l, cat head by-product 20% ammoniacal liquor.
Referring to Fig. 1,, can adopt the high-efficiency high-concentration ammonia nitrogen waste water stripping process of one-level flash distillation recovery waste heat because ammonia nitrogen waste water temperature (70 ℃) is higher.
High-concentration ammonia nitrogenous wastewater is taken out the flash steam that attracts from one-level flash tank 4 through one-level injector 1, and wastewater temperature is brought up to and got into waste water storage tank 6 about 87 ℃, sends into stripping tower 9 through stripping tower feeding pump 8 again; LP steam gets into stripping towers 9 by stripping tower body 90 bottom seal pots 94 and stripping tower 9 interior LP steam import distribution pipes 95 respectively; Gas phase rises through riser 93, and reverse contact of liquid under with spraying through liquid phase distributor 91 carried out heat and mass transfer; After the multi-stage gas-liquid balance; Draw vapor phase stream by stripping tower 9 tops, be cooled to 35 ℃, obtain 20% ammoniacal liquor through reflux exchanger 11; Part ammoniacal liquor returns stripping tower 9 as phegma, and another part is seen off out-of-bounds as sub product.
102 ℃ of 9 ends of stripping tower waste water (ammonia content＜15 mg/l) temperature of discharging reclaim heat through 4 flash distillations of one-level flash tank, go out about 87 ℃ of the wastewater temperatures of waste water storage tank 6, after being cooled to normal temperature, discharge out-of-bounds.
One high-concentration ammonia nitrogenous wastewater, ammonia-nitrogen content: 25000 mg/l, 35 ℃ of temperature, water yield 15t/h.
Processing requirements: water outlet ammonia content at the bottom of the tower＜15 mg/l, cat head by-product 90% gas ammonia.
Referring to Fig. 3, adopt the high-efficiency high-concentration ammonia nitrogen waste water stripping process of double flash evaporation recovery waste heat.
High-concentration ammonia nitrogenous wastewater is taken out the flash steam that attracts from two-stage flash jar 5 through two-stage injection device 2; Wastewater temperature is brought up to and is got into waste water storage tank 6 hypomeres about 60 ℃, sprays the laggard one-level injector 1 of feeding pump 7 pressurize by one-level again, takes out the flash steam that attracts from one-level flash tank 4; Wastewater temperature is brought up to and is got into waste water storage tank 6 epimeres about 82 ℃; Get into stripping tower 9 through stripping tower feeding pump 8, LP steam gets into stripping tower 9 through stripping tower 9 bottom seal pots 94 and LP steam import distribution pipe 95 respectively, and gas phase rises through riser 93; With spray through liquid phase distributor 91 and under reverse contact of liquid; Carry out heat and mass transfer, after the multi-stage gas-liquid balance, draw gas phase by stripping tower 9 tops; After reflux exchanger 11 partial condensations, send return tank 12, draw ammoniacal liquor from return tank 12 bottoms and return stripping tower 9 tops through reflux pump 16 as phegma; Draw the gas ammonia that contains ammonia about 90% from return tank 12 tops, see off out-of-bounds as sub product.
102 ℃ of 9 ends of stripping tower waste water (ammonia content＜15 mg/l) temperature of discharging reclaim heat through the flash distillation of double flash evaporation jar, go out about 60 ℃ of the wastewater temperatures of waste water storage tank 6, after being cooled to normal temperature, discharge out-of-bounds.
High-concentration ammonia nitrogenous wastewater stripping process of the present invention, technology is simple, and facility investment is few, and working process is stable.The high-concentration ammonia nitrogenous wastewater that is applicable to industries such as petrochemical industry, chemical fertilizer, weaving, agricultural chemicals, biological products and Metal smelting is handled.
Claims (4)
1. the high-concentration ammonia nitrogenous wastewater stripping process the steps include:
The waste water of the processing that draw a, stripping tower bottom is through one-level flash distillation or double flash evaporation; Carry out the vapour-liquid direct heat exchange with undressed ammonia nitrogen waste water through one-level injection or two-stage injection; Ammonia nitrogen waste water behind the absorption heat gets into the waste water storage tank, is delivered to the waste water import distribution pipe of line mixer and the mixed back entering of alkali lye stripping tower again by the stripping tower feeding pump;
B, LP steam are sent stripping tower to by the LP steam import distribution pipe of stripping tower;
C, LP steam and the ammonia nitrogen waste water that gets into through waste water import distribution pipe carry out the transmission of heat and quality in stripping tower; Again through circulation at the bottom of the tower, stripping section follows and three grades of circulations of rectifying section round-robin; The liquid phase of each grade working cycle is sprayed by recycle pump pressurization, liquid phase distributor; Fully carry out the transmission of heat and quality with the gas phase in the stripping tower, separate to reach the ammonia nitrogen waste water component through the riser rising;
D, stripping cat head airbleed flow mutually, and through the reflux exchanger condensation, a part of ammoniacal liquor returns stripping tower as phegma; Another part is seen off out-of-bounds as sub product; Obtain sub product ammoniacal liquor, perhaps reflux exchanger adopts the partial condensation mode, and ammoniated sub product gas ammonia is drawn from the return tank top.
2. high-concentration ammonia nitrogenous wastewater stripping process according to claim 1 is characterized in that: alkali lye is NaOH solution or Ca (OH)
2Solution.
3. high-concentration ammonia nitrogenous wastewater stripping process according to claim 1; It is characterized in that: stripping tower comprises stripping tower body, waste water import distribution pipe, seal pot, riser, liquid phase distributor and LP steam import distribution pipe, and the stripping tower body is a vertical tower body, and its top is provided with gaseous phase outlet; The bottom is provided with leakage fluid dram; LP steam import distribution pipe and waste water import distribution pipe are installed in the stripping tower body, and waste water import distribution pipe is installed in the top of LP steam import distribution pipe, and seal pot, riser and liquid phase distributor are installed in the stripping tower body; Riser is set on the seal pot, and liquid phase distributor is positioned at the riser top.
4. high-concentration ammonia nitrogenous wastewater stripping process according to claim 1 is characterized in that: one-level is sprayed or two-stage is sprayed the injector that adopted for being the water-jet exhauster of actuating fluid with the ammonia nitrogen waste water.
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| CN103570172A (en) * | 2013-10-24 | 2014-02-12 | 天华化工机械及自动化研究设计院有限公司 | Phenol-ammonia coal gasification sewage treatment method |
| CN103964631A (en) * | 2014-03-27 | 2014-08-06 | 武汉科梦环境工程有限公司 | Efficient coal-water slurrygasification ash water treatment method |
| CN104628212A (en) * | 2013-11-07 | 2015-05-20 | 青岛博研达工业技术研究所(普通合伙) | High-efficiency treatment method for oil refining wastewater |
| CN104843816A (en) * | 2014-02-18 | 2015-08-19 | 中国石油化工股份有限公司 | Method for combined production of ammonium sulfate and ammonia water through heat pump flash evaporation, stripping and deamination |
| CN104860465A (en) * | 2015-05-22 | 2015-08-26 | 江西明兴环境工程有限公司 | Double-tower catalysis thermal-coupling reflux deamination method and deamination device thereof |
| CN104860464A (en) * | 2015-05-22 | 2015-08-26 | 江西明兴环境工程有限公司 | Energy-saving ammonia-nitrogen wastewater treatment method and device |
| CN105126377A (en) * | 2015-08-24 | 2015-12-09 | 河南省中原大化集团有限责任公司 | Novel ammonia stripper feeding apparatus and application method thereof |
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| CN107840400A (en) * | 2017-12-14 | 2018-03-27 | 夏兴洪 | A kind of evaporator and its processing method for handling high salt high ammonia-nitrogen wastewater |
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| CN110104712A (en) * | 2019-04-19 | 2019-08-09 | 中石化宁波工程有限公司 | A kind of Treatment Method of Ammonia-contained Waste Water |
| CN115196807A (en) * | 2022-07-21 | 2022-10-18 | 中国科学院山西煤炭化学研究所 | Treatment method for deacidifying and deaminating coal chemical wastewater with enhanced waste heat recovery |
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| CN103570172A (en) * | 2013-10-24 | 2014-02-12 | 天华化工机械及自动化研究设计院有限公司 | Phenol-ammonia coal gasification sewage treatment method |
| CN104628212B (en) * | 2013-11-07 | 2018-12-28 | 青岛环优惠众新能源有限公司 | A kind of refinery(waste) water high-efficient treatment method |
| CN104628212A (en) * | 2013-11-07 | 2015-05-20 | 青岛博研达工业技术研究所(普通合伙) | High-efficiency treatment method for oil refining wastewater |
| CN104843816B (en) * | 2014-02-18 | 2016-12-07 | 中国石油化工股份有限公司 | A kind of heat pump flash distillation stripping deamination coproduction of ammonia sulfate and the method for ammonia |
| CN104843816A (en) * | 2014-02-18 | 2015-08-19 | 中国石油化工股份有限公司 | Method for combined production of ammonium sulfate and ammonia water through heat pump flash evaporation, stripping and deamination |
| CN103964631A (en) * | 2014-03-27 | 2014-08-06 | 武汉科梦环境工程有限公司 | Efficient coal-water slurrygasification ash water treatment method |
| CN104860464A (en) * | 2015-05-22 | 2015-08-26 | 江西明兴环境工程有限公司 | Energy-saving ammonia-nitrogen wastewater treatment method and device |
| CN104860464B (en) * | 2015-05-22 | 2017-05-03 | 江西耐可化工设备填料有限公司 | Energy-saving ammonia-nitrogen wastewater treatment method and device |
| CN104860465A (en) * | 2015-05-22 | 2015-08-26 | 江西明兴环境工程有限公司 | Double-tower catalysis thermal-coupling reflux deamination method and deamination device thereof |
| CN105126377A (en) * | 2015-08-24 | 2015-12-09 | 河南省中原大化集团有限责任公司 | Novel ammonia stripper feeding apparatus and application method thereof |
| CN105732300A (en) * | 2016-01-30 | 2016-07-06 | 青岛科技大学 | Heat-pump-technique-based caffeine chlorine extraction wastewater treatment process |
| CN105732300B (en) * | 2016-01-30 | 2018-03-30 | 青岛科技大学 | A kind of caffeine chlorine based on heat pump techniques carries waste water treatment process |
| CN107840400A (en) * | 2017-12-14 | 2018-03-27 | 夏兴洪 | A kind of evaporator and its processing method for handling high salt high ammonia-nitrogen wastewater |
| CN109354099A (en) * | 2018-12-18 | 2019-02-19 | 山东金洋药业有限公司 | Waste ammonia liquor recycling and processing device and its processing method in the production of L- hydroxyproline |
| CN110104712A (en) * | 2019-04-19 | 2019-08-09 | 中石化宁波工程有限公司 | A kind of Treatment Method of Ammonia-contained Waste Water |
| CN115193084A (en) * | 2022-07-07 | 2022-10-18 | 中国海洋石油集团有限公司 | Process enhanced stripping device system and method |
| CN115196807A (en) * | 2022-07-21 | 2022-10-18 | 中国科学院山西煤炭化学研究所 | Treatment method for deacidifying and deaminating coal chemical wastewater with enhanced waste heat recovery |
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Application publication date: 20120704 |