CN103979627A - Multistage efficient gas stripping system of ammonia nitrogen wastewater - Google Patents

Multistage efficient gas stripping system of ammonia nitrogen wastewater Download PDF

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Publication number
CN103979627A
CN103979627A CN201410131943.8A CN201410131943A CN103979627A CN 103979627 A CN103979627 A CN 103979627A CN 201410131943 A CN201410131943 A CN 201410131943A CN 103979627 A CN103979627 A CN 103979627A
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China
Prior art keywords
stripping
water
tower
spray
gas
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Pending
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CN201410131943.8A
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Chinese (zh)
Inventor
宗国伟
吉勇
邓贤文
谭宏林
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Jiangsu Lan Chen Environmental Protection Technology Co Ltd
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Jiangsu Lan Chen Environmental Protection Technology Co Ltd
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Priority to CN201410131943.8A priority Critical patent/CN103979627A/en
Publication of CN103979627A publication Critical patent/CN103979627A/en
Pending legal-status Critical Current

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Abstract

A multistage efficient gas stripping system of ammonia nitrogen wastewater relates to the wastewater treatment system field, and comprises a wastewater collection pool and an efficient gas stripping tower, the efficient gas stripping tower comprises a shell, the upper end of the shell is provided with a water inlet, the bottom of the shell is provided with a water outlet, the wastewater collection pool is connected with the water inlet at the upper end of the efficient gas stripping tower through a gas stripping water inlet tube, the gas stripping water inlet tube is provided with an elevator pump, at least two gas stripping units are arranged in the shell of the efficient gas stripping tower, the gas stripping units are sequentially arranged from top to bottom, each of the gas stripping units comprises a bottom air inlet, an upper portion air outlet, a water distribution and cutting device arranged below the bottom gas inlet, a gas distributor just facing the gas inlet, and a steam-water separation filler arranged between the gas inlet and the gas outlet, and each of the gas inlets is connected with the top of an ammonia absorption tower through a gas inlet pipeline. The system has the advantages of low energy consumption, good gas stripping effect, realization of ammonia nitrogen recycling, and effective prevention of secondary pollution.

Description

A kind of ammonia nitrogen waste water multi-stage, efficient blow-removing system
Technical field
The present invention relates to a kind of Waste Water Treatment, especially relate to a kind of multi-stage, efficient ammonia nitrogen stripping system.
Background technology
Ammonia nitrogen is present in many trade effluents, the particularly production process such as iron and steel, chemical fertilizer, inorganic chemical industry, iron alloy, glass manufacture, meat processing and feed, all discharge ammonia nitrogen waste water, its concentration depends on the multiplexing etc. of feedstock property, technical process, water consumption and water.To a given waste water, select technical scheme to depend primarily on: the last method of disposal of character, treatment effect, economic benefit and the rear water outlet of processing of water etc.Ammonia nitrogen waste water enters water body not only to be caused body eutrophication, causes water body black smelly, and to crowd and biological generation toxic action, although there are many methods can effectively remove ammonia, as physical method has reverse osmosis, distillation, soil irrigation; Chemical method has ion exchange method, ammonia stripping, chemical precipitation method, breakpoint chlorination, electrodialysis, electrochemical treatment, catalytic pyrolysis; Biological method has nitrated and algal culture, but it is applied to the processing of trade effluent, the advantage such as must have that application is convenient, waste water quality is stablized, is adapted to handling property and both economical, therefore, the good technology of ammonia nitrogen processing practicality is at present: biological denitrificaion method, ammonia stripping, vaporizing extract process, break point chlorination, ion exchange method.Wherein ammonia blow-off method uses the most extensive again.Chinese patent discloses a kind of method (publication number: CN202080917U) of processing ammonia nitrogen waste water, comprising circulating closed-loop type ammonia nitrogen stripping system, in circulating water pool, ammonia nitrogen waste water is at a stripping tower internal recycle stripping, can not realize the continuous blow-down of waste water, it is lower that single cover system day is processed the water yield.In stripping tower, be multistage filler, at different levels for being connected in series, more past tower top in stripping tower, ammonia in gas gas concentration is higher, and lower to the stripping efficiency of ammonia nitrogen in waste water, whole system processing efficiency is lower.In ammonia nitrogen stripping system, add denitrfying agent, increased the reagent cost of wastewater treatment; At the bottom of stripping tower tower, add heat exchange coil simultaneously, increased the energy consumption of system, the working cost of system increases greatly.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, provide that a kind of energy consumption is low, stripping is effective, can realize ammonia nitrogen and recycle, effectively prevent the ammonia nitrogen waste water multi-stage, efficient blow-removing system of secondary pollution.
The present invention is for solving the problems of the technologies described above, provide following technical scheme: a kind of ammonia nitrogen waste water multi-stage, efficient blow-removing system, comprise wastewater collection pond, high-efficiency air stripping tower, described high-efficiency air stripping tower comprises housing, housing upper end offers water-in, bottom offers water outlet, described wastewater collection pond connects high-efficiency air stripping tower upper end water-in by stripping water inlet pipe, on stripping water inlet pipe, be provided with lift pump, it is characterized in that being provided with in described high-efficiency air stripping tower shell at least 2 stripping unit, arrange from top to bottom successively in stripping unit, described each stripping unit includes bottom air inlet, air outlet, top, be arranged at water distribution and the cutting device of bottom air inlet below, be right against the carbonated drink separating filler between gas distributor and the air inlet/outlet of inlet mouth, described each inlet mouth all connects air outlet, top, ammonia absorption tower by intake ducting, described each air outlet all connects bottom, ammonia absorption tower inlet mouth by outlet pipe.
As preferably, high-efficiency air stripping tower shell top is provided with water separator.
As preferably, on described outlet pipe, be provided with carbonated drink and separate distribution device and induced draft fan.By this kind of setting, induced draft fan is placed on after high-efficiency air stripping tower, the relative high-efficiency air stripping tower of induced draft fan is exhausting, high-efficiency air stripping tower forms negative pressure, under condition of negative pressure, reduce the boiling point of ammonia in waste water, improve the volatility of ammonia, steam-water ratio while greatly having reduced stripping, has reduced the kinetic energy consumption of stripping blower fan.Separate distribution device by carbonated drink is set, remove in gas with a small amount of moisture, prevent that the alkaline waste water in high-efficiency air stripping tower from entering in absorption tower, consume a large amount of absorption liquids, prevent bringing into of moisture simultaneously, be that in absorption tower, absorption liquid volume increases greatly.
As preferably, three grades of absorption liquid spray unit of upper, middle and lower are set in the housing of ammonia absorption tower, every grade of spray spray unit is by spray equipment, spraying filler, and spraying filler support composition, housing top is also provided with steam separator and steam separator support, described every grade of spray equipment all connects recycle pump by spray piping, the spray piping of described upper spray unit is communicated with tank for sulphuric acid, the spray piping of lower spray unit is communicated with housing bottom, the spray piping of described lower spray unit is also provided with pipeline and is communicated with the spray piping of upper spray unit respectively, housing bottom is separately provided with a circulating line and connects ammonium sulfate storage tank, on circulating line, be provided with ammonium sulfate lift pump.By this kind of setting, gas-to-liquid contact is more abundant, meanwhile, keeps the certain concentration gradient of absorption liquids at different levels when operation, and tower top absorption liquid concentration is the highest, is equivalent to absorb low concentration ammonia at tower top high density absorption liquid, and processing efficiency is higher.
And ammonia absorbs and adopts sulfuric acid to absorb, and final absorption becomes concentration and is about 28% sulphuric acid soln, for industrial application or sale, produces larger economic benefit.
As preferably, high-efficiency air stripping tower enters on intake ducting constant pressure arrangement is set, and comprises pressure transmitter and magnetic valve.
As preferably, wastewater collection pond is closed, prevents that in pond, ammonia overflows contaminate environment.
As preferably, between high-efficiency air stripping tower and ammonia absorption tower, be sealing constant-voltage system, the constant pressure on high-efficiency air stripping tower intake ducting in adopts pressure sensor and electromagnetic valve controlling system.
Principle of work of the present invention is that the ammonia nitrogen waste water in wastewater collection pond is promoted in multi-stage, efficient stripping tower, ammonia nitrogen waste water enters intermediate pool after high-efficiency air stripping tower stripping at the bottom of tower, production reuse or carry out qualified discharge, stripping ammonia out enters ammonia absorption tower and absorbs, gas after absorption cleaning causes high-efficiency air stripping tower inlet mouths at different levels, again utilizes.
Key problem in technology of the present invention is that ammonia nitrogen waste water adopts one-level to promote and enters high-efficiency air stripping column overhead, and in high-efficiency air stripping tower, each stripping unit is connected with next stage stripping unit by efficient water distribution and segmenting system, reduces the kinetic energy consumption that waste water lifting brings.When efficient water distribution and cutting device arrange in high-efficiency air stripping tower, adopt special construction, this device can only flow into next stage stripping unit by water from upper level stripping unit, and the gas in the stripping unit of next stage can not enter the stripping unit of upper level.
As preferably, high-efficiency air stripping tower can be one or many, ensures the continuous blow-down of high-efficiency air stripping tower water outlet, processes the water yield large.
Beneficial effect of the present invention: the present invention is applicable to the improvement of various ammonia nitrogen waste waters, and reach national grade one discharge standard, solve the shortcoming that stripping efficiency is low, kinetic energy consumption is large, running cost is high of existing treatment technology, solved the discharge of secondary pollution simultaneously, produced good economic benefit.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of Fig. 1 high-efficiency air stripping tower.
Fig. 3 is the structural representation on Fig. 1 ammonia absorption tower.
Embodiment
A kind of ammonia nitrogen waste water multi-stage, efficient blow-removing system, comprise wastewater collection pond 001, high-efficiency air stripping tower 002, described high-efficiency air stripping tower 002 comprises housing 021, housing 021 top is provided with water separator 022, housing 021 upper end offers water-in 221, bottom offers water outlet 222, described wastewater collection pond 001 connects high-efficiency air stripping tower 002 upper end water-in 221 by stripping water inlet pipe 011, on stripping water inlet pipe 011, be provided with lift pump 012, in described high-efficiency air stripping tower 002 housing 021, be provided with 6 stripping unit 023, arrange from top to bottom successively in stripping unit 023, described each stripping unit 023 includes bottom air inlet 231, air outlet, top 232, be arranged at water distribution and the cutting device 233 of bottom air inlet 231 belows, be right against gas distributor 234 and the air inlet/outlet (231 of inlet mouth 231, 232) the carbonated drink separating filler 235 between, described each inlet mouth 231 all connects 003 air outlet, top 031, ammonia absorption tower by intake ducting 236, described each air outlet 232 all connects ammonia absorption tower 003 bottom inlet mouth 032 by outlet pipe 237.On described outlet pipe 237, be provided with carbonated drink and separate distribution device 024 and induced draft fan 025.On intake ducting 236, constant pressure arrangement is set, comprises pressure transmitter 026 and magnetic valve 027.Three grades of absorption liquid spray unit 031 of upper, middle and lower are set in 003 housing of ammonia absorption tower, every grade of spray spray unit 031 is by spray equipment 311, spraying filler 312, and spraying filler support 313 forms, housing top is also provided with steam separator 032 and steam separator support 033, described every grade of spray equipment 311 all connects recycle pump 035 by spray piping 034, described upper spray unit (031a, spray piping 034 031b) is communicated with tank for sulphuric acid 036, the spray piping 034 of lower spray unit 031c is communicated with housing bottom, the spray piping 034 of described lower spray unit 031c be also provided with pipeline respectively with upper spray unit (031a, spray piping 034 031b) is communicated with, housing bottom is separately provided with a circulating line 037 and connects ammonium sulfate storage tank 038, on circulating line 037, be provided with ammonium sulfate lift pump 039.
Its technical process is as follows: produce the ammonia nitrogen waste water producing and enter airtight wastewater collection pond 001, prevent that ammonia volatilization from causing environmental pollution, wastewater collection pond 001 is connected to lift pump 012 by stripping water inlet pipe 011, ammonia nitrogen waste water is promoted and is entered high-efficiency air stripping tower 002 by lift pump 012, also be connected with liquid caustic soda chemicals dosing plant 004 by liquid caustic soda chemical feed pipe 041 at lift pump 012 simultaneously, ammonia nitrogen waste water passes through after sprinkling system atomization after entering high-efficiency air stripping tower 002, from top to bottom, through carbonated drink separating filler 235, until enter next stage stripping unit through water distribution and cutting device 233, finally at the bottom of tower, enter intermediate pool 005, carry out reuse or qualified discharge.The required gas of high-efficiency air stripping tower 002 stripping passes through intake ducting 236, inlet mouth 231 and gas distributor 234 enter high-efficiency air stripping tower 002, then by air outlet 232, outlet pipe 237 enters carbonated drink and separates distribution device 024 and induced draft fan 025, and then enter ammonia absorption tower 003, ammonia absorption tower 003 is interior arranges three grades of sprays, the sulfuric acid absorption liquid of different concns is promoted and is entered ammonia absorption tower 003 by water circulating pump 035, absorb the ammonia in gas, the ammonia absorbing forms ammonium sulfate, at the bottom of ammonia absorption tower, be connected with ammonium sulfate lift pump 039, ammonium sulfate promotes and enters ammonium sulfate storage tank 038 through ammonium sulfate lift pump 039.The clean gas forming after absorbing enters high-efficiency air stripping tower inlet mouth 032 after steam separator 032, and then enters high-efficiency air stripping tower 002.
When use, stripping lift pump adds ammonia nitrogen waste water in wastewater collection pond after liquid caustic soda, promote enter in high-efficiency air stripping tower, in high-efficiency air stripping tower after multistage stripping unit stripping, at the bottom of tower, enter intermediate pool, carry out qualified discharge.High-efficiency air stripping tower waste gas out carries out entering ammonia absorption tower after carbonated drink separation, in ammonia absorption tower after three grades of different concns absorption liquids spray, form clean gas and enter high-efficiency air stripping tower inlet pipe, and then enter the recycling of high-efficiency air stripping tower.In ammonia absorption tower, adopt sulfuric acid that ammonia is absorbed, finally form 28% ammonium sulfate, for industrial application or sale.

Claims (5)

1. an ammonia nitrogen waste water multi-stage, efficient blow-removing system, comprise wastewater collection pond, high-efficiency air stripping tower, described high-efficiency air stripping tower comprises housing, housing upper end offers water-in, bottom offers water outlet, described wastewater collection pond connects high-efficiency air stripping tower upper end water-in by stripping water inlet pipe, on stripping water inlet pipe, be provided with lift pump, it is characterized in that being provided with in described high-efficiency air stripping tower shell at least 2 stripping unit, arrange from top to bottom successively in stripping unit, described each stripping unit includes bottom air inlet, air outlet, top, be arranged at water distribution and the cutting device of bottom air inlet below, be right against the carbonated drink separating filler between gas distributor and the air inlet/outlet of inlet mouth, described each inlet mouth all connects air outlet, top, ammonia absorption tower by intake ducting, described each air outlet all connects bottom, ammonia absorption tower inlet mouth by outlet pipe.
2. a kind of ammonia nitrogen waste water multi-stage, efficient blow-removing system according to claim 1, is characterized in that on described outlet pipe, being provided with carbonated drink separates distribution device and induced draft fan.
3. a kind of ammonia nitrogen waste water multi-stage, efficient blow-removing system according to claim 1, it is characterized in that in the housing of ammonia absorption tower, three grades of absorption liquids of upper, middle and lower being set sprays unit, every grade of spray spray unit is by spray equipment, spraying filler, and spraying filler support composition, housing top is also provided with steam separator and steam separator support, described every grade of spray equipment all connects recycle pump by spray piping, the spray piping of described upper spray unit is communicated with tank for sulphuric acid, the spray piping of lower spray unit is communicated with housing bottom, the spray piping of described lower spray unit is also provided with pipeline and is communicated with the spray piping of upper spray unit respectively, housing bottom is separately provided with a circulating line and connects ammonium sulfate storage tank, on circulating line, be provided with ammonium sulfate lift pump.
4. a kind of ammonia nitrogen waste water multi-stage, efficient blow-removing system according to claim 1, is characterized in that high-efficiency air stripping tower enters on intake ducting constant pressure arrangement is set, and comprises pressure transmitter and magnetic valve.
5. a kind of ammonia nitrogen waste water multi-stage, efficient blow-removing system according to claim 1, is characterized in that high-efficiency air stripping tower shell top is provided with water separator.
CN201410131943.8A 2014-04-03 2014-04-03 Multistage efficient gas stripping system of ammonia nitrogen wastewater Pending CN103979627A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104944666A (en) * 2015-06-24 2015-09-30 安徽显闰环境工程有限公司 High-concentration ammonia-nitrogen wastewater treatment combination device for industrial waste water treatment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101935080A (en) * 2009-06-30 2011-01-05 罗松阳 High-concentration ammonia nitrogen blowoff treatment system
DE102009055182A1 (en) * 2009-12-22 2011-06-30 Dresdner Grundwasserforschungszentrum e.V., 01217 Sprinkler irrigation stripping module for removing volatile solute substance from groundwater stream, comprises two vacuum-pressure-resistant sprinkler irrigation columns in water through flow direction connected in series
CN202080917U (en) * 2011-04-22 2011-12-21 杭州恒易环保科技有限公司 Circulating closed-loop type ammonia nitrogen stripping system
CN103449551A (en) * 2013-09-17 2013-12-18 天津市创举科技有限公司 Multi-level ammonia-nitrogen wastewater removal process and equipment
CN203807201U (en) * 2014-04-03 2014-09-03 江苏蓝晨环保科技有限公司 Multistage efficient air stripping system for ammonia nitrogen wastewater

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101935080A (en) * 2009-06-30 2011-01-05 罗松阳 High-concentration ammonia nitrogen blowoff treatment system
DE102009055182A1 (en) * 2009-12-22 2011-06-30 Dresdner Grundwasserforschungszentrum e.V., 01217 Sprinkler irrigation stripping module for removing volatile solute substance from groundwater stream, comprises two vacuum-pressure-resistant sprinkler irrigation columns in water through flow direction connected in series
CN202080917U (en) * 2011-04-22 2011-12-21 杭州恒易环保科技有限公司 Circulating closed-loop type ammonia nitrogen stripping system
CN103449551A (en) * 2013-09-17 2013-12-18 天津市创举科技有限公司 Multi-level ammonia-nitrogen wastewater removal process and equipment
CN203807201U (en) * 2014-04-03 2014-09-03 江苏蓝晨环保科技有限公司 Multistage efficient air stripping system for ammonia nitrogen wastewater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104944666A (en) * 2015-06-24 2015-09-30 安徽显闰环境工程有限公司 High-concentration ammonia-nitrogen wastewater treatment combination device for industrial waste water treatment

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Application publication date: 20140813