CN104860362A - Concentrated ammonia rectification apparatus for treating titanium dioxide industrial wastewater - Google Patents
Concentrated ammonia rectification apparatus for treating titanium dioxide industrial wastewater Download PDFInfo
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- CN104860362A CN104860362A CN201410059115.8A CN201410059115A CN104860362A CN 104860362 A CN104860362 A CN 104860362A CN 201410059115 A CN201410059115 A CN 201410059115A CN 104860362 A CN104860362 A CN 104860362A
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Abstract
The present invention relates to a concentrated ammonia rectification apparatus for treating titanium dioxide industrial wastewater. The concentrated ammonia rectification apparatus comprises a pre-heater and a steam stripping deamination tower, wherein the steam stripping deamination tower comprises a tower kettle, the tower kettle is sequentially divided into a rectification section, a wastewater feeding section, a stripping separation section and a residual liquid separation section from top to bottom, turbogrid type trays are arranged in the tower kettle, the turbogrid type tray is provided with a plate type gas separation membrane, the bottom portion of the tower kettle is provided with a wastewater outlet, and a high temperature steam inlet is arranged on the side surface below the outer portion of the tower kettle. The apparatus of the present invention has characteristics of low cost, high ammonia nitrogen conversion efficiency, and no secondary pollution of the treated wastewater.
Description
Technical field
The present invention relates to a kind of rectifier unit, be specifically related to a kind of dense ammonia rectifier unit processing titanium dioxide industry waste water.
Background technology
Titanium dioxide (TiO2) be a kind ofly to be widely used, mineral dye that consumption is huge or catalyzer, be a kind of large-tonnage industrial chemicals product, as the production of denitrating catalyst titanium dioxide, all the time along with a large amount of waste water handling problem.Due to the waste water and dregs complicated component that discharges in production process of titanium pigment and impurity is many, most importantly acid waste water, includes suspended substance, ammonia nitrogen etc.; Comprise flue dust, sulfurous gas, sulfuric acid mist and solid boiler slag, flyash, ferrous sulfate and aqueous gypsum mud etc. in addition.In production technique, in order to resource can be made to reach Appropriate application and discharged wastewater met the national standard, a kind of effective method of wastewater treatment must be selected.
Ammonia nitrogen is the crucial water-quality guideline controlling the pollution of water body itrogenous organic substance and protection aquatic ecosystem; the ammonia nitrogen aqueous concentration of titanium dioxide industry waste water is at 6000-20000mg/L; excessive ammonia nitrogen enters water body will cause body eutrophication; reduce water body ornamental value, and the NO3-N and NO2-N of oxidized generation also can affect the hydrobiont even health of the mankind.
The ammonia nitrogen processing method of the commonplace use of current trade effluent comprises biological nitration/denitrification process, ammonia aeration technique, break point chlorination oxidizing process method, reverse osmosis membrane technique and ion exchange method etc.But it is huge due to cost of investment to realize aforesaid method, safeguard comparatively complicated and working cost is higher, cause environment the factors such as secondary pollution less for large-scale industry sewage treatment project.Conventional ammonia-nitrogen desorption technique affects comparatively large by pH concentration and temperature in water body, when in water body, pH value is less than 11.5, its free state ammonia nitrogen conversion efficiency reduces, and cannot play good degradation effect, has certain engineering limitation.
Summary of the invention
Goal of the invention: the object of the invention is to overcome deficiency of the prior art, provide a kind of cost lower, ammonia nitrogen conversion efficiency is high, the dense ammonia rectifier unit of the process titanium dioxide industry waste water of the waste water non-secondary pollution after process.
Technical scheme: in order to solve the problems of the technologies described above, a kind of dense ammonia rectifier unit for the treatment of titanium dioxide industry waste water of the present invention, it comprises preheater and steam stripping ammonia-removing tower, described steam stripping ammonia-removing tower comprises tower reactor, described tower reactor is divided into rectifying section from top to bottom, wastewater feed section, profit reduction and reserving segregation section and raffinate segregation section, water inlet pipe is provided with in described tower reactor exterior lateral sides, three water-ins are provided with on described water inlet pipe top, ammoniacal liquor return line is separately provided with in described tower reactor exterior lateral sides, throngh flowing type tray is provided with in described tower reactor inside, described throngh flowing type tray is provided with panel-type air separatory membrane, described throngh flowing type tray is made up of S type column plate matrix, described S type column plate matrix is provided with mass transfer hole, ammonia outlet is provided with at described tower reactor top, wastewater outlet is provided with bottom described tower reactor, below described tower reactor outside, side is provided with high-temperature steam entrance.
Thermometer and tensimeter is provided with in described tower reactor upper outside.
The first liquidometer and the second liquidometer is provided with at described tower reactor lower outside.
Be provided with top visor on described tower reactor top, be provided with bottom visor in described tower reactor bottom.
Be provided with preheater on described tower reactor side, described preheater is connected with described steam stripping ammonia-removing tower by pipeline.
The membranous wall aperture of described panel-type air separatory membrane is 0.1nm-0.5nm.
The present invention includes preheater, steam stripping ammonia-removing tower two parts.Preheater is provided with hot water or cold water and imports and exports; Steam stripping ammonia-removing tower comprises rectifying section, wastewater feed section, profit reduction and reserving segregation section, raffinate segregation section from top to bottom successively.Top fractionation stage is provided with ammonia vapour outlet, ammoniacal liquor refluxing opening, throngh flowing type tray; Wastewater feed section is provided with waterwater entrance, and entrance is outer to be connected with preheater; Profit reduction and reserving segregation section is provided with throngh flowing type tray, heating steam inlet; Raffinate segregation section is provided with wastewater outlet at tower bottom.Ammonia vapor outlet is positioned at rectifying tower top, for collecting the higher ammonia steam of rectifying tower top purity, ammoniacal liquor refluxing opening provides the amount of liquid phase needed for column plate mass transfer, rectifying section throngh flowing type tray completes the vapour-liquid mass of rectifying section, column plate is provided with special membrane material, improve the permeability of ammonia steam, column plate is regularly arranged the mass transfer hole of some amount; Wastewater feed section is positioned at tower body middle and upper part, for rectifying tower provides charging stoste or heat exchange stoste; Profit reduction and reserving segregation section throngh flowing type tray mainly completes the vapour-liquid mass of profit reduction and reserving segregation section, and under the effect of heating steam, accelerate the conversion of ammonia steam, heating steam inlet is the import of system capacity input, for the normal operation of rectifying tower provides heat-exchange power; The wastewater outlet of bottom raffinate segregation section is positioned at rectifier bottoms, for the waste water after emission treatment.
The present invention is achieved through the following technical solutions: waste water enters tower axe by pipeline, hot steam in steam stripping ammonia-removing tower is combined and forms ammonia/water vapor gas, because the relative volatility of ammonia is greater than water, therefore under the effect of steam, more ammonia enters gas phase, and set up new vapor liquid equilibrium with the liquid that last layer S type column plate flows down, on column plate, mould material retains and penetratingly makes gas-liquid phase equilibrium, ammonia density in gas phase is improved constantly, then enter condenser by tower top to be liquefied completely, the dense ammonia of a part of liquefaction is returned in tower by tower top to increase the inner ammonia density of tower body from condenser by pump, along with ammonia constantly volatilizees liquefaction, in tower body, waste water ammonia density is more and more lower, finally discharge from wastewater outlet, ammonia density now in waste water has been reduced to the requirement of qualified discharge.Because the waste water of discharging from wastewater outlet still has larger heat, the preheater now by connecting, carries out heat exchange by the hot wastewater of discharge and Yuan Shui, collects heat and is sent to the increment that tower axe reduces System steam.
The present invention adopts the technology of heating, stripping, rectifying, enhance removing of ammonia nitrogen pollutant in waste water, realize being separated of waste water and ammonia nitrogen pollutant, enhance the purifying of ammonia, concentrate, the ammonia and nitrogen pollution substrate concentration in processed waste water is lower than national grade one discharge standard (≤15ppm) requirement simultaneously.
The present invention does not establish waste gas in the whole process of the high dense ammonia nitrogen titanium dioxide industry waste water of process, waste residue arranges mouth outward, and a complete set of equipment realizes the recycling treatment of ammonia nitrogen pollutant.
The present invention is simple to operate, and floor space is little, and processing cost is low, and effectively can realize the efficient removal of ammonia nitrogen pollutant, water outlet ammonia nitrogen concentration can reach 5-15ppm, and the resource utilization that can realize ammonia nitrogen pollutant reclaims.
What the present invention adopted is a kind of less energy-consumption ammonia still process technology, to compare traditional ammonia-nitrogen desorption technique, improve the physical construction that rectifier unit (tower) is inner, arranged by rational column plate and the selection of mould material on column plate, make in tower, to define multi-layer vapor transmission, improve the permeability of ammonia steam, reach the rectification and purification of ammonia nitrogen pollutant.
Adopt Multilayer cross-flow formula S type mould material column plate in tower of the present invention, can effectively prevent and treat waste water suspension, fouling causes device block, thus the rate of recovery of raising titanium dioxide industry waste water ammonia; Mould material is panel-type air separatory membrane mainly, and membranous wall aperture is 0.1nm-0.5nm, and film withstand temperature is-10-300 DEG C.
Preheater of the present invention is provided with hot water or cold water and imports and exports, ammonia vapor outlet is positioned at rectifying tower top, for collecting the higher ammonia steam of rectifying tower top purity, ammoniacal liquor refluxing opening provides the amount of liquid phase needed for column plate mass transfer, rectifying section throngh flowing type tray completes the vapour-liquid mass of rectifying section, column plate is provided with special membrane material, improves the permeability of ammonia steam, column plate is regularly arranged the mass transfer hole of some amount.Wastewater feed section waterwater entrance is positioned at tower body middle and upper part, for rectifying tower provides charging stoste or heat exchange stoste.Profit reduction and reserving segregation section throngh flowing type tray mainly completes the vapour-liquid mass of profit reduction and reserving segregation section, and under the effect of heating steam, accelerate the conversion of ammonia steam, heating steam inlet is the import of system capacity input, for the normal operation of rectifying tower provides heat-exchange power.
When apparatus of the present invention use, waste water enters tower axe by pipeline, hot steam in steam stripping ammonia-removing tower is combined and forms ammonia/water vapor gas, because the relative volatility of ammonia is greater than water, therefore under the effect of steam, more ammonia enters gas phase, and set up new vapor liquid equilibrium with the liquid that last layer S type column plate flows down, on column plate, mould material retains and penetratingly makes gas-liquid phase equilibrium, ammonia density in gas phase is improved constantly, then enter condenser by tower top to be liquefied completely, the dense ammonia of a part of liquefaction is returned in tower by tower top to increase the inner ammonia density of tower body from condenser by pump, along with ammonia constantly volatilizees liquefaction, in tower body, waste water ammonia density is more and more lower, finally discharge from wastewater outlet, ammonia density now in waste water has been reduced to the requirement of qualified discharge.Because the waste water of discharging from wastewater outlet still has larger heat, preheater now by connecting, the hot wastewater of discharge is entered from preheater, heat exchange is carried out with former water, collect heat and be sent to the increment that tower axe reduces System steam, waste water is finally from discharge, and ammonia and nitrogen pollution substrate concentration is now lower than national grade one discharge standard (≤15ppm) requirement.
Beneficial effect: compared with prior art, its remarkable advantage is in the present invention: one-piece construction of the present invention is simple, and cost is lower, and ammonia nitrogen conversion efficiency is high, the waste water non-secondary pollution after process.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of the type of S described in the present invention column plate matrix.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As depicted in figs. 1 and 2, a kind of dense ammonia rectifier unit for the treatment of titanium dioxide industry waste water of the present invention, it comprises preheater 1 and steam stripping ammonia-removing tower 2, described steam stripping ammonia-removing tower 2 comprises tower reactor 3, described tower reactor 3 is divided into rectifying section 4 from top to bottom, wastewater feed section 5, profit reduction and reserving segregation section 6 and raffinate segregation section 7, water inlet pipe 8 is provided with in described tower reactor 3 exterior lateral sides, three water-ins 9 are provided with on described water inlet pipe 8 top, ammoniacal liquor return line 10 is separately provided with in described tower reactor 3 exterior lateral sides, throngh flowing type tray 11 is provided with in described tower reactor 3 inside, described throngh flowing type tray 11 is provided with panel-type air separatory membrane 12, described throngh flowing type tray 11 is made up of S type column plate matrix 13, described S type column plate matrix 13 is provided with mass transfer hole 14, ammonia outlet 15 is provided with at described tower reactor 3 top, wastewater outlet 16 is provided with bottom described tower reactor 3, high-temperature steam entrance 17 is provided with in side, described tower reactor 3 outside below, thermometer 18 and tensimeter 19 is provided with in described tower reactor 3 upper outside, the first liquidometer 20 and the second liquidometer 21 is provided with at described tower reactor 3 lower outside, be provided with top visor 22 on described tower reactor 3 top, be provided with bottom visor 23 in described tower reactor 3 bottom, be provided with preheater 1 on described tower reactor 3 side, described preheater 1 is connected with described steam stripping ammonia-removing tower 2 by pipeline, the membranous wall aperture of described panel-type air separatory membrane 12 is 0.1nm-0.5nm.One-piece construction of the present invention is simple, and cost is lower, and ammonia nitrogen conversion efficiency is high, the waste water non-secondary pollution after process.
The invention provides a kind of thinking and method; the method and access of this technical scheme of specific implementation is a lot; the above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art, under the premise without departing from the principles of the invention, some improvements and modifications can also be made; these improvements and modifications also should be considered as protection scope of the present invention, and all available prior art of each integral part not clear and definite in the present embodiment is realized.
Claims (6)
1. the dense ammonia rectifier unit for the treatment of titanium dioxide industry waste water, it is characterized in that: it comprises preheater (1) and steam stripping ammonia-removing tower (2), described steam stripping ammonia-removing tower (2) comprises tower reactor (3), described tower reactor (3) is divided into rectifying section (4) from top to bottom, wastewater feed section (5), profit reduction and reserving segregation section (6) and raffinate segregation section (7), water inlet pipe (8) is provided with in described tower reactor (3) exterior lateral sides, three water-ins (9) are provided with on described water inlet pipe (8) top, ammoniacal liquor return line (10) is separately provided with in described tower reactor (3) exterior lateral sides, throngh flowing type tray (11) is provided with in described tower reactor (3) inside, described throngh flowing type tray (11) is provided with panel-type air separatory membrane (12), described throngh flowing type tray (11) is made up of S type column plate matrix (13), described S type column plate matrix (13) is provided with mass transfer hole (14), ammonia outlet (15) is provided with at described tower reactor (3) top, wastewater outlet (16) is provided with in described tower reactor (3) bottom, high-temperature steam entrance (17) is provided with in side, described tower reactor (3) outside below.
2. the dense ammonia rectifier unit for the treatment of titanium dioxide industry waste water according to claim 1, is characterized in that: be provided with thermometer (18) and tensimeter (19) in described tower reactor (3) upper outside.
3. the dense ammonia rectifier unit for the treatment of titanium dioxide industry waste water according to claim 1, is characterized in that: be provided with the first liquidometer (20) and the second liquidometer (21) at described tower reactor (3) lower outside.
4. the dense ammonia rectifier unit for the treatment of titanium dioxide industry waste water according to claim 1, is characterized in that: be provided with top visor (22) on described tower reactor (3) top, is provided with bottom visor (23) in described tower reactor (3) bottom.
5. the dense ammonia rectifier unit for the treatment of titanium dioxide industry waste water according to claim 1, is characterized in that: be provided with preheater (1) on described tower reactor (3) side, described preheater (1) is connected with described steam stripping ammonia-removing tower (2) by pipeline.
6. the dense ammonia rectifier unit for the treatment of titanium dioxide industry waste water according to claim 1, is characterized in that: the membranous wall aperture of described panel-type air separatory membrane (12) is 0.1nm-0.5nm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410059115.8A CN104860362A (en) | 2014-02-21 | 2014-02-21 | Concentrated ammonia rectification apparatus for treating titanium dioxide industrial wastewater |
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| CN201410059115.8A CN104860362A (en) | 2014-02-21 | 2014-02-21 | Concentrated ammonia rectification apparatus for treating titanium dioxide industrial wastewater |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107935327A (en) * | 2017-12-30 | 2018-04-20 | 杭州布瑞霖环保科技有限公司 | A kind of livestock/poultry wastewater treatment system |
| CN107986580A (en) * | 2017-12-30 | 2018-05-04 | 杭州布瑞霖环保科技有限公司 | A kind of aquaculture wastewater processing system |
| CN108128828A (en) * | 2018-01-31 | 2018-06-08 | 丹阳同泰化工机械有限公司 | A kind of rectifying column for sewage disposal |
| CN108178222A (en) * | 2018-02-10 | 2018-06-19 | 许灯彪 | A kind of ammonia ingredient recovery and treatment method and system |
| US10815132B2 (en) | 2017-04-21 | 2020-10-27 | China Petroleum & Chemical Corporation | Apparatus and method for treating waste water containing ammonium salts |
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2014
- 2014-02-21 CN CN201410059115.8A patent/CN104860362A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10815132B2 (en) | 2017-04-21 | 2020-10-27 | China Petroleum & Chemical Corporation | Apparatus and method for treating waste water containing ammonium salts |
| US11572289B2 (en) | 2017-04-21 | 2023-02-07 | China Petroleum & Chemical Corporation | Apparatus and method for treating waste water containing ammonium salts |
| CN107935327A (en) * | 2017-12-30 | 2018-04-20 | 杭州布瑞霖环保科技有限公司 | A kind of livestock/poultry wastewater treatment system |
| CN107986580A (en) * | 2017-12-30 | 2018-05-04 | 杭州布瑞霖环保科技有限公司 | A kind of aquaculture wastewater processing system |
| CN107986580B (en) * | 2017-12-30 | 2023-09-29 | 东莞市健源泉水处理科技有限公司 | Culture sewage treatment system |
| CN107935327B (en) * | 2017-12-30 | 2023-12-29 | 丰都县典昌农牧技术有限公司 | Livestock and poultry wastewater treatment system |
| CN108128828A (en) * | 2018-01-31 | 2018-06-08 | 丹阳同泰化工机械有限公司 | A kind of rectifying column for sewage disposal |
| CN108178222A (en) * | 2018-02-10 | 2018-06-19 | 许灯彪 | A kind of ammonia ingredient recovery and treatment method and system |
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Application publication date: 20150826 |