CN105692742A - Horizontal pipe type falling film evaporation high salinity wastewater depth concentration device - Google Patents
Horizontal pipe type falling film evaporation high salinity wastewater depth concentration device Download PDFInfo
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- CN105692742A CN105692742A CN201610120012.7A CN201610120012A CN105692742A CN 105692742 A CN105692742 A CN 105692742A CN 201610120012 A CN201610120012 A CN 201610120012A CN 105692742 A CN105692742 A CN 105692742A
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- falling film
- film evaporation
- steam
- evaporation concentrator
- horizontal tube
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/08—Thin film evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/046—Treatment of water, waste water, or sewage by heating by distillation or evaporation under vacuum produced by a barometric column
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention relates to a horizontal pipe type falling film evaporation high salinity wastewater depth concentration device which comprises a horizontal pipe type falling film evaporation concentrator. The horizontal pipe type falling film evaporation concentrator is provided with a horizontally-arranged heat exchange pipe. A feeding pipe of the horizontal pipe type falling film evaporation concentrator is provided with a preheater, and a discharging pipe of the horizontal pipe type falling film evaporation concentrator is provided with a discharging pump. The horizontal pipe type falling film evaporation concentrator is provided with two sections of circulation concentration pipes. The horizontal pipe type falling film evaporation concentrator is provided with a steam return line, and the steam return line is provided with a steam recycle compressor. The steam return line is connected with a steam inlet pipe and then communicated to the heat exchange pipe of the evaporation concentrator, and the horizontal pipe type falling film evaporation concentrator is provided with a vacuum pump. The device can efficiently treat high salinity wastewater with low cost through depth concentration, the space occupied by the whole equipment is reduced by the adoption of the horizontal pipe type falling film evaporation concentrator, building and maintenance are convenient, and project initial investment and running cost are saved.
Description
Technical field
The invention belongs to high slat-containing wastewater concentration technical field, be specifically related to a kind of horizontal tube falling film evaporation degree of depth enrichment facility。
Background technology
China is with the colliery energy for main energy sources form。Coal Chemical Industry, coking of coal, power plant effluent broadly falls into the industrial wastewater that ubiquity salt content is significantly high, and the ecological environment of the mankind is not caused irreversible destruction by the directly discharge of this type of waste water or qualified discharge。
At present, the domestic concentration technology for high slat-containing wastewater mainly has vertical tube to rise film, vertical tube falling and three kinds of process routes of forced circulation, it is low that three kinds of process equipments are usually present heat transfer efficiency, energy consumption is high, the common drawback that the equipment initial stage has high input, and this three kind equipment is both needed to take bigger solid space, difficult in maintenance, safety is relatively low；It is low that first two there is also cycles of concentration, the shortcoming that subsequent treatment pressure is big；The energy consumption of latter and input are also all very big。
Summary of the invention
The technical problem to be solved be for above-mentioned prior art provide a kind of can low cost, efficiently, the process device of degree of depth concentration high-salt wastewater, adopt horizontal tube falling film condenser to reduce integral device to be taken up space, it is easy to build and safeguards, save project initial stage input and operating cost。
This invention address that the technical scheme that the problems referred to above adopt is: a kind of horizontal tube falling film evaporation high-salt wastewater degree of depth enrichment facility, including horizontal tube falling film evaporation concentrator, described horizontal tube falling film evaporation concentrator has horizontally disposed heat exchanger tube, the feeding pipe of horizontal tube falling film evaporation concentrator arranges preheater, discharging pipeline arranges discharging pump, horizontal tube falling film evaporation concentrator is configured with two sections of circulation concentration pipelines, horizontal tube falling film evaporation concentrator is configured with on steam-return line and steam-return line and is provided with steam recycle compressor, steam-return line is connected, with steam steam inlet pipe, the heat exchanger tube being switched to evaporation concentrator again, horizontal tube falling film evaporation concentrator vacuum pump。
Preferably, the heating tube side of described preheater connects and is provided with condensate pump on horizontal tube falling film evaporation concentrator and this heating tube side, it is achieved solidifying for the indirect steam formed in evaporation concentrator heat exchanger tube water is passed into preheater high-salt wastewater is preheated。The solidifying water of the indirect steam produced in evaporation concentrator tube side is discharged as high-quality distilled water as thermal source, high-salt wastewater can be preheated through condensate pump, improves energy utilization rate, reduces evaporation and concentration cost。
Preferably, the bypass line with valve is set between described steam-return line and steam steam inlet pipe, ensures the steady of steam recycle start/stop of compressor by bypass valve, and be used for slightly regulating exerting oneself。Indirect steam grade increase thus being reused, is reduced energy consumption needed for system, it is achieved that the internal recycle of steam in heat exchanger tube tube side by steam-return line。
Relatively it is reasonable that, described two sections of circulation concentration pipelines are respectively provided with circulating pump。
Horizontal tube falling film evaporation concentrator includes the cylinder of accumbency, is arranged on the end socket of cylinder one end, and horizontally disposed described heat exchanger tube is uniformly arranged up and down, heat exchanger tube be provided above horizontal cloth liquid dish, cylinder is provided with correspondence various adapters。
Compared with prior art, present invention have the advantage that
1, by heating surface bank horizontal positioned, reduce the setting height(from bottom) of device, reduce primary construction cost, and safety in operation can also be improved。
2, material is membranaceous from up to down flow outside heat transfer tube wall, adds vapours and walks tube side, and under in-tube condensation and discharge condensation latent heat, material flows from top to bottom along pipe outer wall, natural film forming。Owing to flow process is short, and through repeatedly redistributing, thin film drainage is uniform, and little being easy to controls the thickness of film, and heat transfer coefficient obtains and is effectively improved, so that the heat exchange gross area effectively reduces；The reduction of the gross area and the reduction of film thickness can reduce again the circulating load of saline, thus reducing power consumption。
3, adopt thin-walled heat exchanger tube, strengthen heat transfer, reduce cost；Horizontally disposed tube bank intensity, rigidity requirement are low, such that it is able to adopt thin-walled heat exchanger tube, reduce material consumption, and thin-walled can strengthen again heat transfer simultaneously。
4, optimize cloth liquid mode, adopt multi-stage evaporation, make salt content bring up to close to saturated, and reduce operation and cost of investment；Circulating brine adopts two segment type formulas, and the concentrated solution after one section of evaporation enters two-stage nitration and is evaporated。Owing to the elevation of boiling point of one section of material is lower than the elevation of boiling point of two-stage nitration, so that the effective temperature difference of a section is improved, thus reducing heat exchange area；The load that can reduce steam recycle compressor while of raising of the average effective temperature difference, thus reducing equipment power consumption。
Meanwhile, the operating feature of horizontal tube bundle is gathered so that evenly, mobility is better, adds and reasonably controls flow for cloth liquid, such that it is able to by brine concentration to close to saturated state。
5, employing steam recompression technology, reduces system energy consumption, will adopt the indirect steam main heat source as evaporation and concentration improving self the evaporation generation after temperature through mechanical compressor, it is achieved recycling of steam, effectively reduces system overall heat consumption。
Accompanying drawing explanation
Fig. 1 is the structural representation of horizontal tube falling film evaporation high-salt wastewater degree of depth enrichment facility in the embodiment of the present invention；
Fig. 2 is the longitudinally cutting structural representation of horizontal tube falling film evaporation concentrator in the embodiment of the present invention；
Fig. 3 is the transverse cross sectional structural representation of horizontal tube falling film evaporation concentrator in the embodiment of the present invention。
1 horizontal tube falling film evaporation concentrator 2 material water pump 37 one sections of water circulating pump 8 two-stage nitration water circulating pump 9 vacuum pumps of preheater 4 steam recycle compressor 5 condensate pump 6 discharging pump
1.1 1.6 1 sections, steam inlet of cylinder 1.2 end socket 1.3 cloth liquid dish 1.4 tube sheet 1.5 circulation fluids export 1.7 solidifying mono-section of circulation fluid entrance 1.10 two-stage nitration circulation fluid entrance 1.11 of water out A1.9 of two-stage nitration circulation fluid outlet 1.8 and coagulate water out B1.12 heat-transfer pipe。
Detailed description of the invention
In order to make technical scheme and advantage become apparent from, the present embodiment combines solidifying hydro-thermal retracting device and steam recycle compressor realizes haline water and concentrates the recovery with high-quality saline。Compared with traditional evaporation concentration equipment, reducing the height of system and device, it is simple to Operation and Maintenance, cost of investment reduces by more than 50%, and energy consumption reduces more than 60%, and system is run controlled and more stable。
In embodiment, high-salt wastewater is mainly composed of sodium chloride, sodium sulfate etc., using saturated or superheated steam as thermal source。Below with reference to accompanying drawing, the present invention is described in further detail。High-salt wastewater degree of depth enrichment facility includes horizontal tube falling film evaporation concentrator 1, the feeding pipe of horizontal tube falling film evaporation concentrator 1 arranges preheater 3, feeding pipe before preheater 3 is provided with material water pump 2 for high-salt wastewater being pumped into preheater 3, discharging pipeline arranges discharging pump 6 for discharging closely saturated saline, horizontal tube falling film evaporation concentrator 1 is configured with two sections and is respectively configured independent loops pump 7, the circulation concentration pipeline of 8, horizontal tube falling film evaporation concentrator 1 is configured with on steam-return line and steam-return line and is provided with steam recycle compressor 4, bypass line with valve is set between steam-return line and steam steam inlet pipe, the steady of steam recycle compressor 4 start and stop is ensured by bypass valve, and be used for slightly regulating exerting oneself。Steam-return line is connected the tube side being switched to evaporation concentrator 1 again with steam steam inlet pipe, and horizontal tube falling film evaporation concentrator 1 also configures that vacuum pump 9 is for arranging outside fixed gas。
The heating tube side of above-mentioned preheater 3 is connected with horizontal tube falling film evaporation concentrator 1, and the solidifying water of the high-quality indirect steam produced in evaporation concentrator tube side passes into preheater by condensate pump 5, as the preheating heating source of material。
Specifically, horizontal tube falling film evaporation concentrator includes the cylinder 1.1 of accumbency, cylinder 1.1 one end is provided with end socket 1.2, cylinder 1.1 is provided with one section of circulation fluid outlet 1.6, two-stage nitration circulation fluid outlet 1.7, one section of circulation fluid entrance 1.9, two-stage nitration circulation fluid entrance 1.10, steam inlet 1.5, solidifying water out A1.8, solidifying water out B1.11, tube sheet 1.4 it is provided with inside cylinder 1.1, horizontally disposed heat exchanger tube about 1.12 is uniformly arranged, heat exchanger tube 1.12 be provided above horizontal cloth liquid dish 1.3, material after cloth liquid dish cloth liquid from top to bottom uniformly under ooze, enter the shell side of concentrator。
Material is squeezed in one section of vaporization chamber by material water pump 2, and by material preheater 3 solidifying water heat exchange with the indirect steam of high temperature, preliminary preheating material reaches more than 50 DEG C。Saline material after preheating enters in horizontal tube falling film evaporation concentrator 1, and ooze under the uniform cloth liquid of horizontal cloth liquid dish 1.3 on entrance cylinder top concentrate the mixing of materials of pipeline with one section of circulation after, enter horizontal tube falling film evaporation concentrator 1 shell side, material is formed on heat exchanger tube outer wall and drips under relatively thin liquid film, and period evaporates with the saturated vapor heat exchange in tube side。It is indoor that material overflow after concentration enters dual circulation, and with the mixing of materials of two-stage nitration circulation concentration pipeline after carry out dual circulation concentration。Rare material is carried out initial concentration circulation by one section of water circulating pump 7, two-stage nitration water circulating pump 8 under stable conditions to the brine recycling or the discharging that improve concentration。It is preferred that circulating pump 7,8 pipeline needs add flow monitoring device, circular flow monitoring is regulated。In system, material concentration is relevant to evaporation capacity, and the frequency regulating feed rate, discharging flow or steam recycle compressor 4 can realize material concentration stability contorting。The solidifying water of indirect steam discharges the heat source as preheater 3 as high-quality distilled water through condensate pump 5。Material after final concentration is got system by strong brine discharging pump 6, the so far Matter Transfer in completion system and evaporation and concentration。
Add the vapours (saturated vapor of 105 DEG C, corresponding saturation pressure is about 120kpa), enter horizontal tube falling film evaporation concentrator 1 tube side, heat exchange is carried out with the material of shell side, the indirect steam (about 90 DEG C, 91kpa) that shell side evaporation produces returns steam recycle compressor 4 repressurization and is warming up to the saturated vapor continuation of 105 DEG C as adding vapours recycling。Bypass line is set between steam-return line, ensures the steady of steam recycle compressor 4 start and stop by bypass valve, and be used for slightly regulating exerting oneself。This system makes indirect steam grade promote thus being reused by compressor, reduces energy consumption needed for system。So far the internal recycle of steam is completed。
The final Waste water concentrating of the present embodiment is to sodium chloride-containing 25.5%, when circulating load controls stable, cloth liquid is uniform, liquid film is column or drop-wise distribution continuously, flowing is uniform and flow velocity is normal, substantially increases situation without viscosity, and in running, tube wall shows metallic luster all the time, have no the appearance of dirt speckle or salting stain, it was shown that horizontal pipe falling film evaporation device disclosure satisfy that the demand that saline high power concentrates。
In this embodiment, brine recycling multiplying power is only three times of inlet amount, circulating ratio far below vertical tube falling tens times, and owing to setting height(from bottom) is lower, circulation pump lift is lower, circulating pump power consumption is only 1/10th of vertical tube falling, the energy consumption that comprehensively other electrical equipment is total, horizontal tube falling film system using electricity wisely more than 60%。Significant energy-saving effect is had when showing horizontal tube falling film system for brine concentration。
In this embodiment, actual measurement overall heat-transfer coefficient is more than 3200w/m2DEG C, and in vertical tube falling device, this numerical value is only about 2000, adds employing light-wall pipe, tube bank gross weight has obvious reduction, and horizontal tube falling film device can save the cost of more than 50% on material。
Claims (5)
1. a horizontal tube falling film evaporation high-salt wastewater degree of depth enrichment facility, it is characterized in that: include horizontal tube falling film evaporation concentrator, described horizontal tube falling film evaporation concentrator has horizontally disposed heat exchanger tube, the feeding pipe of horizontal tube falling film evaporation concentrator arranges preheater, discharging pipeline arranges discharging pump, horizontal tube falling film evaporation concentrator is configured with two sections of circulation concentration pipelines, horizontal tube falling film evaporation concentrator is configured with on steam-return line and steam-return line and is provided with steam recycle compressor, steam-return line is connected, with steam steam inlet pipe, the heat exchanger tube being switched to evaporation concentrator again, horizontal tube falling film evaporation concentrator vacuum pump。
2. horizontal tube falling film evaporation high-salt wastewater degree of depth enrichment facility according to claim 1, it is characterized in that: the heating tube side of described preheater is connected on horizontal tube falling film evaporation concentrator and this heating tube side and is provided with condensate pump, it is achieved solidifying for the indirect steam formed in evaporation concentrator heat exchanger tube water is passed into preheater as the thermal source that high-salt wastewater is preheated。
3. horizontal tube falling film evaporation high-salt wastewater degree of depth enrichment facility according to claim 1, it is characterised in that: the bypass line with valve is set between described steam-return line and steam steam inlet pipe。
4. horizontal tube falling film evaporation high-salt wastewater degree of depth enrichment facility according to claim 1, it is characterised in that: described two sections of circulation concentration pipelines are respectively provided with circulating pump。
5. horizontal tube falling film evaporation high-salt wastewater degree of depth enrichment facility according to claim 1, it is characterized in that: described horizontal tube falling film evaporation concentrator includes the cylinder of accumbency, it is arranged on the end socket of cylinder one end, horizontally disposed described heat exchanger tube is uniformly arranged up and down, heat exchanger tube be provided above horizontal cloth liquid dish, cylinder is provided with correspondence adapter。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610120012.7A CN105692742B (en) | 2016-03-03 | 2016-03-03 | Horizontal tube falling film evaporation high-salt wastewater depth enrichment facility |
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| CN201610120012.7A CN105692742B (en) | 2016-03-03 | 2016-03-03 | Horizontal tube falling film evaporation high-salt wastewater depth enrichment facility |
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| CN105692742A true CN105692742A (en) | 2016-06-22 |
| CN105692742B CN105692742B (en) | 2018-10-26 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108635900A (en) * | 2018-05-26 | 2018-10-12 | 江苏源拓环境科技有限公司 | A kind of compact micro-pressure-difference push in circulating and evaporating concentration and crystallization apparatus |
| CN110590040A (en) * | 2019-09-30 | 2019-12-20 | 江苏源拓环境科技有限公司 | Wastewater treatment method and wastewater treatment system |
| CN114392576A (en) * | 2021-12-25 | 2022-04-26 | 江苏源拓环境科技有限公司 | Horizontal pipe falling film type rectifying device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101497465B (en) * | 2008-02-02 | 2011-06-08 | 上海达源环境科技工程有限公司 | Process for evaporating high-concentration sewage |
| CN203959862U (en) * | 2014-06-16 | 2014-11-26 | 溧阳德维透平机械有限公司 | A kind of MVR evaporation concentration equipment for high-salt wastewater treatment industry |
| CN204173941U (en) * | 2014-10-29 | 2015-02-25 | 宝鸡忠诚制药机械有限责任公司 | Horizontal tube falling film thermocompression distiller |
| CN104529743B (en) * | 2014-12-09 | 2016-03-16 | 双良节能***股份有限公司 | A kind of sodium-acetate continuous evaporative crystallization method |
| CN204607621U (en) * | 2015-03-13 | 2015-09-02 | 沈阳航空航天大学 | Tidal energy sun power and mechanical steam recompression sea water desaltination system ensemble structure |
| CN205398149U (en) * | 2016-03-03 | 2016-07-27 | 双良节能***股份有限公司 | High salt waste water degree of depth enrichment facility of horizontal tubular falling film evaporation |
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2016
- 2016-03-03 CN CN201610120012.7A patent/CN105692742B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108635900A (en) * | 2018-05-26 | 2018-10-12 | 江苏源拓环境科技有限公司 | A kind of compact micro-pressure-difference push in circulating and evaporating concentration and crystallization apparatus |
| CN110590040A (en) * | 2019-09-30 | 2019-12-20 | 江苏源拓环境科技有限公司 | Wastewater treatment method and wastewater treatment system |
| CN110590040B (en) * | 2019-09-30 | 2023-08-25 | 江苏源拓环境科技有限公司 | Wastewater treatment method and wastewater treatment system |
| CN114392576A (en) * | 2021-12-25 | 2022-04-26 | 江苏源拓环境科技有限公司 | Horizontal pipe falling film type rectifying device |
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