CN102241422A - Circulating closed ammonia nitrogen stripping system - Google Patents
Circulating closed ammonia nitrogen stripping system Download PDFInfo
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- CN102241422A CN102241422A CN2011101016037A CN201110101603A CN102241422A CN 102241422 A CN102241422 A CN 102241422A CN 2011101016037 A CN2011101016037 A CN 2011101016037A CN 201110101603 A CN201110101603 A CN 201110101603A CN 102241422 A CN102241422 A CN 102241422A
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- Prior art keywords
- stripping
- tower
- filler
- waste water
- absorption tower
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- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000000945 filler Substances 0.000 claims abstract description 63
- 238000010521 absorption reaction Methods 0.000 claims abstract description 58
- 239000002351 wastewater Substances 0.000 claims abstract description 39
- 239000007788 liquid Substances 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000003795 desorption Methods 0.000 claims description 15
- 239000007921 spray Substances 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000000889 atomisation Methods 0.000 claims description 8
- 239000000835 fiber Substances 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 8
- 239000003595 mist Substances 0.000 claims description 7
- 238000012856 packing Methods 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 5
- 239000003814 drug Substances 0.000 claims description 5
- 235000013409 condiments Nutrition 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 229920001083 polybutene Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 15
- 230000008569 process Effects 0.000 abstract description 10
- 239000002912 waste gas Substances 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 238000005507 spraying Methods 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 14
- 229910021529 ammonia Inorganic materials 0.000 description 13
- 239000010865 sewage Substances 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 7
- 229910052757 nitrogen Inorganic materials 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000009692 water atomization Methods 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 1
- DPDMMXDBJGCCQC-UHFFFAOYSA-N [Na].[Cl] Chemical compound [Na].[Cl] DPDMMXDBJGCCQC-UHFFFAOYSA-N 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 238000009388 chemical precipitation Methods 0.000 description 1
- 238000005660 chlorination reaction Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- Physical Water Treatments (AREA)
Abstract
The invention relates to a waste water treatment system, in particular to a circulating closed ammonia nitrogen stripping system. The system mainly solves the technical problems of low efficiency, high energy consumption, heavy secondary pollution, instable operation, high temperature requirement of a stripping process, low stripping efficiency in cold winter, need of heating waste water, high treatment cost and the like in the prior art. The system provided by the invention comprises a waste water circulating pool, wherein the waste water circulating pool is connected with a stripping liquid inlet pump; the stripping liquid inlet pump is connected with a stripping tower; the stripping tower is communicated with the waste water circulating pool; a waste water spraying device is arranged in the stripping tower and on the top; a filler layer is fixed below the waste water spraying device; the top of the stripping tower is connected with an absorption tower through a waste gas pipe; a filler layer is fixed in the absorption tower; the top of the absorption tower is connected with a stripping fan through a pipe; the stripping fan is arranged at the bottom of the stripping tower and is communicated with the stripping tower; and the waste water circulating pool is also connected with a pH reversely regulating pool through a clean water pipe.
Description
Technical field
The present invention relates to a kind of Waste Water Treatment, especially relate to a kind of circulation closed loop ammonia-nitrogen desorption system.
Background technology
The ammonia nitrogen waste water source is very wide and quantity discharged is big, all produces a large amount of high-concentration ammonia nitrogenous wastewaters as chemical fertilizer, coking, petrochemical industry, pharmacy, food, refuse landfill etc.A large amount of ammonia nitrogen waste waters enter water body not only to be caused body eutrophication, causes water body black smelly, and will increase difficulty and the cost of giving water treatment, even to crowd and biological generation toxic action.The processing of ammonia nitrogen has a lot of methods, as break point chlorination, chemical precipitation method, biochemical process, electrochemical process etc., and these method processing cost height, Technology is not mature enough, can only the lower waste water of concentration of treatment.Ammonia nitrogen waste water to high density, big yield adopts the most still stripping technology.Chinese patent discloses a kind of method (publication number: CN102001721A) of handling ammonia nitrogen waste water, it is included in microwave field irradiation and carries out removal of ammonia and nitrogen, before removal of ammonia and nitrogen is handled, order is measured the ammonia nitrogen concentration of ammonia nitrogen waste water and is added the operation of modified activated carbon, ammonia nitrogen mass ratio in modified activated carbon and the ammonia nitrogen waste water is 2-212: 1, and the ammonia nitrogen waste water that has added modified activated carbon forms liquid-solid mixed solution; Described liquid-solid mixed solution is at microwave field irradiation removal of ammonia and nitrogen.Modified activated carbon is by sodium hydroxide, potassium hydroxide, sodium-chlor, Repone K, nine water water glass, one or several carry out the gac that modification is handled to gac hydrochloric acid and vitriolic, the time of microwave field irradiation removal of ammonia and nitrogen is 4-15 minute, temperature is a 50-117 degree Celsius, its method can also be to be included in microwave field irradiation to carry out removal of ammonia and nitrogen, solid support of modified gac in the microwave field, the ammonia nitrogen waste water Continuous Flow is crossed the microwave field irradiation removal of ammonia and nitrogen that is loaded with modified activated carbon, irradiation time is 4-15 minute, and the temperature of microwave field irradiation removal of ammonia and nitrogen is a 50-117 degree Celsius.Shortcomings such as but this removal of ammonia and nitrogen technology exists, and efficient is low, energy consumption is big, secondary pollution is big, operation is stable inadequately.Existing stripping process is higher to temperature requirement, and the stripping efficiency ratio is lower under the colder situation of weather in winter, need heat waste water, has so just increased the cost of handling greatly.
Summary of the invention
The present invention provides a kind of circulation closed loop ammonia-nitrogen desorption system, it mainly is that solution existing in prior technology efficient is low, energy consumption is big, secondary pollution is big, operation is stable inadequately, and stripping process is higher to temperature requirement, the stripping efficiency ratio is lower under the colder situation of weather in winter, need heat the technical problem that the cost of processing is more high to waste water.
Above-mentioned technical problem of the present invention is mainly solved by following technical proposals:
A kind of circulation closed loop ammonia-nitrogen desorption of the present invention system, comprise the effluent cycle pond, described effluent cycle pond is connected with the stripping liquid feeding pump by waste pipe, the stripping liquid feeding pump is connected with stripping tower by pipeline, the stripping tower bottom is provided with water outlet and is communicated with the effluent cycle pond, the top is provided with the waste water spray equipment in the stripping tower, the below of waste water spray equipment is fixed with packing layer by the condiment support, the filler support below is provided with redistributor, the stripping tower top is connected with the absorption tower by waste pipe, the inlet mouth on absorption tower is located at the bottom, inside, absorption tower is fixed with packing layer by the condiment support, and the filler support below is provided with redistributor, and the top, absorption tower is connected with the stripping blower fan by pipeline, the stripping blower fan is located at the stripping tower bottom and is communicated with it, and the effluent cycle pond is also by clear water pipe coupling pH readjustment pond.Stripping tower, stripping liquid feeding pump, absorption tower, sour absorption pump, recycle pump, stripping blower fan are efficiently installed in the supporting effluent cycle pond of the present invention on the effluent cycle pond.The outlet of stripping blower fan connects the import of stripping tower, and the outlet of stripping tower connects the import on absorption tower, and the outlet on absorption tower connects the import of stripping blower fan, form one closed circuit, avoid in the tail gas ammonia excessive, cause secondary pollution.
The present invention pumps into stripping tower with the sewage in the circulatory pool, and the sewage behind stripping flows into the effluent cycle pond again and carries out repeatedly stripping, and the waste gas behind the stripping absorbs by the absorption tower, and the waste gas after the absorption enters behind the stripping blower fan stripping once more.Form between native system stripping tower, absorption tower, the effluent cycle pond one closed circuit, the sewage behind stripping repeatedly reaches emission standard and requires the back qualified discharge.
As preferably, the top on described stripping tower, absorption tower is provided with the fibre bed mist eliminator.The present invention installs the fibre bed demister at the top on stripping tower, absorption tower, and this device can be caught the submicron droplet to reach collecting effect.This device resistance is little, and demist is effective, can prevent effectively that the waste water behind the stripping from entering in the absorption system, prevent the pollution of waste water to absorption liquid, has improved the purity that absorbs the back by product, by product is better reclaimed and utilizes.
As preferably, described stripping tower bottom is provided with heat exchange coil, and heat exchange coil is communicated with bottom the absorption tower by pipeline, recycle pump.Heat exchange coil is in order to recycle the heat that discharges in the absorption process.Improving the temperature of stripping tower water inlet, is that this system can move under different temperature condition stably.Can keep the temperature of total system especially in winter, not need waste water is heated, keep the stable of total system treatment effect.
As preferably, the top of described absorption tower packing layer is provided with the waste water spray equipment, and the waste water spray equipment is communicated with the bottom, absorption tower by pipeline, sour absorption pump.Can circulate like this sour water is handled.
As preferably, described effluent cycle pond be provided with can feed alkali lye, denitrfying agent advance the medicament pipe, pH readjustment pond is provided with acid inlet tube.Utilize the medicament pipe can in sewage, add a kind of deamidization, the effect of this deamidization has two, the first is that sewage forms a large amount of small bubbles in the stripping process at the surface energy that reduces sewage, is that ammonia is better finished the gas-liquid exchange in these small bubbles; It two is the chemical forces that interrupt between ammonia and the water molecules, and ammonia can be dissociated out as far as possible, and stripping efficient is provided.
As preferably, filler support in the described stripping tower is made up of stripping tower upper strata filler support, stripping tower middle layer filler support, stripping tower lower floor filler support, be fixed with stripping tower upper strata filler, stripping tower middle layer filler, stripping tower lower floor filler on three filler supports respectively, upper strata, middle layer filler support below all are provided with redistributor, and stripping tower lower floor filler support below is provided with air-distributor.The multiwalled filler is set can be so that the stripping effect be better.
As preferably, filler support in the described absorption tower is made up of upper strata, absorption tower filler support, absorption tower lower floor filler support, be fixed with upper strata, absorption tower filler, absorption tower lower floor filler on two filler supports respectively, every layer of filler support below all is provided with redistributor.The multiwalled filler is set can be so that sour assimilation effect be better.
As preferably, described waste water spray equipment is the solid spiral nozzle of high atomization.The present invention adopts a kind of gas-liquid mixed stripping liquid feeding pump, by the stripping liquid feeding pump, waste water and the air of handling is mixed in pump chamber, then waste water is promoted to cat head, by the solid spiral nozzle of high atomization with the waste water atomizing spray.Use gas-liquid mixed stripping liquid feeding pump, improved the shower nozzle top hole pressure, make the waste water atomizing more thorough, increased the area of gas-to-liquid contact in the stripping process, improved the stripping effect.
As preferably, described heat exchange coil is graphite modified coiled polybutene pipe.
As preferably, described stripping blower fan is connected with additional blast main, can replenish air at any time in the stripping blower fan.
Therefore, the present invention can keep stablizing stripping the ammonia nitrogen in the sewage is removed under condition of different temperatures, improve stripping efficient, reduce running cost, the ammonia nitrogen waste water that makes high density is through reaching country's discharging first discharge standard behind the stripping process, and solved temperature in the stripping process and reduced influence, reduced the discharging of secondary pollution in the stripping process stripping.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the present invention.
Component among the figure, position and numbering: effluent cycle pond 1, waste pipe 2, stripping liquid feeding pump 3, stripping tower 4, redistributor 5, waste pipe 6, absorption tower 7, stripping blower fan 8, clear water pipe 9, pH adjusts back pond 10, fibre bed mist eliminator 11, heat exchange coil 12, recycle pump 13, advance medicament pipe 14, acid inlet tube 15, stripping tower upper strata filler support 16, stripping tower middle layer filler support 17, stripping tower lower floor filler support 18, stripping tower upper strata filler 19, stripping tower middle layer filler 20, stripping tower lower floor filler 21, air-distributor 22, upper strata, absorption tower filler support 23, absorption tower lower floor filler support 24, upper strata, absorption tower filler 25, absorption tower lower floor filler 26, the solid spiral nozzle 27 of high atomization, replenish blast main 28, acid absorption pump 29.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment: a kind of circulation closed loop ammonia-nitrogen desorption system of this example, as Fig. 1, an effluent cycle pond 1 is arranged, the effluent cycle pond be provided with can feed alkali lye, denitrfying agent advance medicament pipe 14.The effluent cycle pond is connected with stripping liquid feeding pump 3 by waste pipe 2, the stripping liquid feeding pump is connected with stripping tower 4 by pipeline, the top is provided with fibre bed mist eliminator 11 in the stripping tower, fibre bed mist eliminator below is provided with the waste water spray equipment and is communicated with the stripping liquid feeding pump, and the waste water spray equipment is the solid spiral nozzle 27 of high atomization.The below of the solid spiral nozzle of high atomization is provided with stripping tower upper strata filler 19, stripping tower upper strata filler support 16, redistributor 5, stripping tower middle layer filler 20, stripping tower middle layer filler support 17, redistributor 5, stripping tower lower floor filler 21, stripping tower lower floor filler support 18, air-distributor 22 successively.The stripping tower bottom is communicated with stripping blower fan 8, and the stripping blower fan is connected with and replenishes blast main 28.The stripping tower top is connected with absorption tower 7 by waste pipe 6, and the inlet mouth on absorption tower is located at the bottom.The top is provided with fibre bed mist eliminator 11 in the absorption tower, fibre bed mist eliminator below is provided with stripping tower upper strata filler 19, stripping tower middle layer filler support 17, redistributor 5, stripping tower lower floor filler 21, stripping tower lower floor filler support 18, redistributor 5 successively, each layer filler top all is provided with the solid spiral nozzle 27 of high atomization, and the solid spiral nozzle of high atomization is communicated with the bottom, absorption tower by pipeline, sour absorption pump 29.The top, absorption tower is connected with stripping blower fan 8 by pipeline, and the effluent cycle pond also connects pH readjustment pond 10 by clear water pipe 9, and pH readjustment pond is provided with acid inlet tube 15.The stripping tower bottom is provided with heat exchange coil 12, and heat exchange coil is graphite modified coiled polybutene pipe, and heat exchange coil is communicated with the bottom, absorption tower by pipeline, recycle pump 13.
During use, utilize stripping liquid feeding pump 3 that sewage is pumped in the stripping tower 4 from effluent cycle pond 1, sewage behind stripping flows into circulatory pool again and carries out repeatedly stripping, and the waste gas behind the stripping absorbs by absorption tower 7, and the waste gas after the absorption enters behind the stripping blower fan 8 stripping once more.Form between native system stripping tower 4, absorption tower 7, the effluent cycle pond 1 one closed circuit, the sewage behind stripping repeatedly reaches emission standard and requires the back qualified discharge.
The above only is specific embodiments of the invention, but constitutional features of the present invention is not limited thereto, and any those skilled in the art is in the field of the invention, and the variation of being done or modify all is encompassed among the claim of the present invention.
Claims (10)
1. circulation closed loop ammonia-nitrogen desorption system, comprise effluent cycle pond (1), it is characterized in that described effluent cycle pond (1) is connected with stripping liquid feeding pump (3) by waste pipe (2), the stripping liquid feeding pump is connected with stripping tower (4) by pipeline, the stripping tower bottom is provided with water outlet and is communicated with the effluent cycle pond, the top is provided with the waste water spray equipment in the stripping tower, the below of waste water spray equipment is fixed with packing layer by the condiment support, the filler support below is provided with redistributor (5), the stripping tower top is connected with absorption tower (7) by waste pipe (6), the inlet mouth on absorption tower is located at the bottom, inside, absorption tower is fixed with packing layer by the condiment support, the filler support below is provided with redistributor (5), the top, absorption tower is connected with stripping blower fan (8) by pipeline, the stripping blower fan is located at stripping tower (4) bottom and is communicated with it, and effluent cycle pond (1) also connects pH readjustment pond (10) by clear water pipe (9).
2. a kind of circulation closed loop ammonia-nitrogen desorption according to claim 1 system is characterized in that the top of described stripping tower (4), absorption tower (7) is provided with fibre bed mist eliminator (11).
3. a kind of circulation closed loop ammonia-nitrogen desorption according to claim 1 and 2 system is characterized in that described stripping tower (4) bottom is provided with heat exchange coil (12), and heat exchange coil is communicated with bottom pipeline, recycle pump (13) and absorption tower (7).
4. a kind of circulation closed loop ammonia-nitrogen desorption according to claim 1 and 2 system, the top that it is characterized in that described absorption tower (7) packing layer is provided with the waste water spray equipment, and the waste water spray equipment is communicated with the bottom, absorption tower by pipeline, sour absorption pump (29).
5. a kind of circulation closed loop ammonia-nitrogen desorption according to claim 1 and 2 system, it is characterized in that described effluent cycle pond (1) be provided with can feed alkali lye, denitrfying agent advance medicament pipe (14), pH readjustment pond (10) is provided with acid inlet tube (15).
6. a kind of circulation closed loop ammonia-nitrogen desorption according to claim 1 and 2 system, it is characterized in that the interior filler support of described stripping tower (4) is by stripping tower upper strata filler support (16), stripping tower middle layer filler support (17), stripping tower lower floor filler support (18) is formed, be fixed with stripping tower upper strata filler (19) on three filler supports respectively, stripping tower middle layer filler (20), stripping tower lower floor filler (21), the upper strata, filler support below, middle layer all is provided with redistributor (5), and stripping tower lower floor filler support below is provided with air-distributor (22).
7. according to the described a kind of circulation closed loop ammonia-nitrogen desorption of claim 1 or 2 system, it is characterized in that the filler support in the described absorption tower (7) is made up of upper strata, absorption tower filler support (23), absorption tower lower floor filler support (24), be fixed with upper strata, absorption tower filler (25), absorption tower lower floor filler (26) on two filler supports respectively, every layer of filler support below all is provided with redistributor (5).
8. according to the described a kind of circulation closed loop ammonia-nitrogen desorption of claim 4 system, it is characterized in that described waste water spray equipment is the solid spiral nozzle of high atomization (27).
9. according to the described a kind of circulation closed loop ammonia-nitrogen desorption of claim 3 system, it is characterized in that described heat exchange coil (12) is graphite modified coiled polybutene pipe.
10. according to the described a kind of circulation closed loop ammonia-nitrogen desorption of claim 3 system, it is characterized in that described stripping blower fan (8) is connected with additional blast main (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110101603 CN102241422B (en) | 2011-04-22 | 2011-04-22 | Circulating closed ammonia nitrogen stripping system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110101603 CN102241422B (en) | 2011-04-22 | 2011-04-22 | Circulating closed ammonia nitrogen stripping system |
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| Publication Number | Publication Date |
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| CN102241422A true CN102241422A (en) | 2011-11-16 |
| CN102241422B CN102241422B (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201110101603 Expired - Fee Related CN102241422B (en) | 2011-04-22 | 2011-04-22 | Circulating closed ammonia nitrogen stripping system |
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Cited By (20)
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| CN102583613A (en) * | 2012-02-22 | 2012-07-18 | 宜兴市金德环保设备有限公司 | Stripping tower |
| CN102744168A (en) * | 2012-06-15 | 2012-10-24 | 无锡翱翔环保机械有限公司 | Supply water spray head for thermal deaerator |
| CN103432974A (en) * | 2013-09-14 | 2013-12-11 | 河北冀衡集团有限公司 | Deaminizing and dewatering technology and special device for sodium persulfate (salt) synthetic fluid |
| CN104176851A (en) * | 2014-07-07 | 2014-12-03 | 湖北泰盛化工有限公司 | Glyphosate wastewater purifying device and purifying method |
| CN104250040A (en) * | 2014-06-05 | 2014-12-31 | 浙江南化防腐设备有限公司 | Concentrated seawater bromine extraction and closed-loop air stripping system and method |
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| 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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