CN204265565U - Based on the marine exhaust desulfurization washing water treatment system of sodium alkali - Google Patents

Based on the marine exhaust desulfurization washing water treatment system of sodium alkali Download PDF

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Publication number
CN204265565U
CN204265565U CN201420740546.6U CN201420740546U CN204265565U CN 204265565 U CN204265565 U CN 204265565U CN 201420740546 U CN201420740546 U CN 201420740546U CN 204265565 U CN204265565 U CN 204265565U
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China
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air
outlet
inlet
pool
pump
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Expired - Fee Related
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CN201420740546.6U
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Inventor
刘亚琼
沈飞翔
耿见宇
李晓波
姜小鑫
任中
王志刚
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Shanghai shine Heavy Industry Co., Ltd.
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711th Research Institute of CSIC
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Abstract

The utility model discloses a kind of marine exhaust desulfurization washing water treatment system based on sodium alkali, comprise Aeration fan, neutralization oxidation integral pool, flocculation tank, air-water mixing pump, air flotation pool, lift pump and strainer.Neutralization oxidation integral pool is provided with wastewater inlet pipeline, alkali lye inlet ductwork, blast inlet and outlet; The blast inlet that the outlet of Aeration fan is oxidized integral pool by pipeline and neutralization is communicated with; Air-water mixing pump has liquid-inlet, air inlet and outlet, the liquid-inlet of this air-water mixing pump is oxidized the outlet of integral pool and the outlet of the tank that flocculates with neutralization respectively by pipeline, the inlet communication of mixing wastewater with air pump outlet and air flotation pool, first outlet of air flotation pool is communicated with the entrance of lift pump, second outlet and the inlet communication of sludge tank of air flotation pool, be provided with dreg scraper in this air flotation pool; Promote the inlet communication of pump outlet and strainer.The advantages such as it is good that the utility model has treatment effect, and equipment occupation space is little, energy consumption is low, running cost is low.

Description

Based on the marine exhaust desulfurization washing water treatment system of sodium alkali
Technical field
The utility model relates to a kind of marine exhaust desulfurization washing water treatment system based on sodium alkali.
Background technology
Marine exhaust washing desulphurization technology processes SO in marine diesel waste gas at present xmajor technique, use waste gas washing desulphurization technology to produce and need desulfurization washing water to be processed, the washing water emission standard of International Maritime Organizaton (IMO) to marine exhaust cleaning system has also made strict regulation, therefore the key being treated as marine exhaust washing system of boats and ships desulfurization washing water.
Because marine exhaust washing desulphurization technology belongs to emerging technology, the treatment system both at home and abroad for its washing water seldom has detailed introduction.Marine exhaust washing desulphurization technology at present based on sodium alkali becomes the mainstream technology of domestic and international marine exhaust washing desulphurization due to reasons such as desulfuration efficiency are high.Waste gas enters washing tower and sodium hydroxide spray liquid contact reacts, and in system cloud gray model, washings recycles, and the part such as the particulate pollutant in gas and unburnt fuel oil is absorbed by spray liquid, and alkaline spray liquid absorbs SO simultaneously 2form sulfurous acid and sulfate liquor, together constitute and need desulfurization washing water to be processed.The main component of desulfurization washing water is sulphite, vitriol and a small amount of greasy dirt, impurity and particle etc.Therefore a kind of effective washing water treatment system is needed to carry out Timing Processing to desulfurization washing water, to reach IMO to discharge the indexs such as pH, PAH, turbidity, temperature requirement about washing water.
The process of prior art land is to the waste water treatment process of the similar waste water of boats and ships desulfurization washing water composition, air supporting-flotation waste water facture due to disengaging time shorter, scum silica frost water ratio is lower, the advantages such as level of automation is high are widely used, but this technique and equipment used thereof may exist following drawback in marine vessel applications environment:
1. equipment used mainly comprises oxidation fan, neutralization tank, oxidation pond, transferpump, air compressor machine, dissolving, air flotation pool etc., and cause integral device floor space large, energy consumption is higher;
2. the operating mode moment of diesel engine is all changing, and needs washing water Pollutant levels to be processed different under causing different operating mode, likely causes effluent quality unstable on the one hand, causes the waste of water treatment agent when the low operating mode of diesel engine is run on the other hand;
3. the oil in water emulsion that the greasy dirt that carries of washing water is mainly finely divided, makes finely divided oil in water emulsion naturally float with bubble by flocculation-flotation technique is more difficult, may affect effluent quality.
In addition, application number be 201310422883.0, denomination of invention be propose in the application text of " a kind of boats and ships desulfurizing waste water processing device and method " a kind of for magnesium base-seawater method desulfurization after the device of wastewater treatment.Also there is following drawback in this boats and ships desulfurizing waste water processing device:
1. in wastewater treatment, solid-liquid separation process adopts cyclonic separator to utilize the principle of centrifugal settling to realize, and the flowing due to swirler inner fluid produces certain shearing action, is easily broken up by the solid particulate of flocculation, reduces treatment effect, worsens sepn process;
2. the liquid after process discharges after macroporous resin adsorption post, and absorption greasy dirt efficiency is low, not easily regenerates.
Summary of the invention
It is good that the purpose of this utility model is to provide a kind for the treatment of effect, and equipment occupation space is little, energy consumption is low, running cost is low, be applicable to the marine exhaust desulfurization washing water treatment system based on sodium alkali of marine exhaust desulfurization washing water quality.
In order to achieve the above object, the utility model have employed following technical scheme:
Based on a marine exhaust desulfurization washing water treatment system for sodium alkali, its feature is, comprises Aeration fan, neutralization oxidation integral pool, flocculation tank, air-water mixing pump, air flotation pool, lift pump and strainer; Neutralization oxidation integral pool is provided with wastewater inlet pipeline, alkali lye inlet ductwork, blast inlet and outlet; The blast inlet that the outlet of Aeration fan is oxidized integral pool by pipeline and neutralization is communicated with; Air-water mixing pump has liquid-inlet, air inlet and outlet, the liquid-inlet of this air-water mixing pump is oxidized the outlet of integral pool and the outlet of the tank that flocculates with neutralization respectively by pipeline, the inlet communication of mixing wastewater with air pump outlet and air flotation pool, first outlet of air flotation pool is communicated with the entrance of lift pump, second outlet and the inlet communication of sludge tank of air flotation pool, be provided with dreg scraper in this air flotation pool; Promote the inlet communication of pump outlet and strainer.
After can realizing the process of boats and ships washing water by the utility model, water quality meets the emission standard of IMO to washing water, and the utility model comprises following advantage and disadvantage:
1. the utility model utilizes neutralization oxidation integral pool to introduce while realization oxidation in alkali lye and modified, neutralizes, is oxidized and completes in a pond, adopts neutralization tank, oxidation pond to carry out modifiedly saving space more respectively.Utilize the space saved to add strainer, improve treatment effect.Utilize air-water mixing pump to replace traditional air compressor machine, dissolving simultaneously, save the device space of air compressor machine, dissolving on the one hand, also reduce energy consumption simultaneously, solve land air supporting-floatation process integral device floor space large, the problem that energy consumption is higher;
2. in air flotation pool, be provided with turbidity transducer, automatically regulate dissolved air water amount and treatment agent usage quantity in conjunction with diesel engine condition according to washing water turbidity feedback, save the usage quantity of water treatment agent under low operating mode, can guarantee that effluent quality is basically identical;
3. the washing water after filter filters solid-liquid separation, remove finely divided oil in water emulsion, and solving part oil in water emulsion cannot naturally be floated by flocculation-air floating and affect the problem of effluent quality;
4. air flotation pool utilizes the characteristic of water different solubility at various pressures, makes to produce microbubble in water under pressurization or condition of negative pressure.Under the acting in conjunction of the many kinds of forces such as interfacial tension, bubble rising buoyancy and hydrostaticpressure difference, promote that micro bubble adheres to coagulated particles thing and floats to the water surface, solid-liquid separation is realized by dreg scraper, compare centrifugal settling principle to realize solid-liquid separation to have treatment effect good, the advantage of stable effluent quality;
5. adopt the finely divided emulsification greasy dirt that walnut shell filter filtration, purification removal washing water carry, guarantee that discharge water waste liquid oleaginousness meets emission standard, there is adsorptive power strong, the feature of oil, the removal of suspended substance economic benefits and social benefits can be carried out, during backwash, nut-shell rubs at the volley mutually, desorption, regenerative power are strong, and chemical stability is good, is applicable to ship environment.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the marine exhaust desulfurization washing water treatment system based on sodium alkali according to the utility model one embodiment.
Description of reference numerals: 1, Aeration fan; 2, control valve; 3, wastewater inlet pipeline; 4, neutralization oxidation integral pool; 5, flocculate tank; 6, air-water mixing pump; 7, air flotation pool; 8, turbidity transducer; 9, sludge tank; 10, lift pump; 11, strainer; 12, visor; 13, agitator; 14, counter-flushing pipeline; 15, stopping valve; 16, dreg scraper; 17, tensimeter; 18, under meter; 19, air inflow control valve; 20, alkali lye inlet ductwork; 21, blast inlet.
Embodiment
Please refer to Fig. 1.The marine exhaust desulfurization washing water treatment system based on sodium alkali according to the utility model one embodiment comprises: Aeration fan 1, neutralization oxidation integral pool 4, flocculation tank 5, air-water mixing pump 6, air flotation pool 7, lift pump 10 and strainer 11.
Neutralization oxidation integral pool 4 is provided with wastewater inlet pipeline 3, alkali lye inlet ductwork 20, blast inlet 21 and outlet, and blast inlet 21 is provided with control valve 2.The blast inlet that the outlet of Aeration fan 1 is oxidized integral pool 4 by pipeline and neutralization is communicated with.Air-water mixing pump 6 has liquid-inlet, air inlet and outlet, and the liquid-inlet of air-water mixing pump 6 is oxidized the outlet of integral pool 4 and the outlet of the tank 5 that flocculates, the outlet of air-water mixing pump 6 and the inlet communication of air flotation pool 7 with neutralization respectively by pipeline.Establish tensimeter 17 after air-water mixing pump 6, the air intlet of air-water mixing pump 6 is provided with under meter 18 and air inflow control valve 19.First outlet of air flotation pool 7 is communicated with the entrance of lift pump 10, second outlet of air flotation pool 7 and the inlet communication of sludge tank 9, be provided with and turbidity transducer 8 in this air flotation pool 7, thus automatically can regulate the usage quantity of dissolved air water amount and flocculation agent according to washing water turbidity feedback.Dreg scraper 16 is also provided with in air flotation pool 7.The outlet of lift pump 10 and the inlet communication of strainer 11.Strainer 11 is provided with counter-flushing pipeline 14, and counter-flushing pipeline 14 is provided with stopping valve 15, and strainer 11 regularly carries out back flushing by counter-flushing pipeline 14, realizes desorption and regeneration.Preferably, this strainer 11 is walnut shell filter, is provided with visor 12 and agitator 13 in walnut shell filter.
The working process of the marine exhaust desulfurization washing water treatment system based on sodium alkali of the present utility model is described below in conjunction with a specific embodiment.
Power set promoted mainly by certain boats and ships be rated output is 4500kW, specified speed is the slow speed diesel engine of 163.6r/min, adopt the marine exhaust desulfurization washing water treatment system based on sodium alkali of the present utility model, washing water extract to neutralization oxidation integral pool by timing, extraction amount 800L/h.The step of washing water process is as follows:
One, neutralization oxidation is modified
Neutralization oxidation integral pool 4 need be entered by wastewater inlet pipeline 3 by washing water to be processed from the recycle system, open Aeration fan 1, and regulate the by-pass valve control after Aeration fan 2, aeration disturbance is utilized to carry out neutralization modified to sulfite oxidation rate >98%, complete aeration, and it is modified to utilize aeration disturbance to carry out neutralization.Simultaneously in pond, pH sensor is set, by PH Sensor monitoring to the pH value fixing quantity alkali lye of washing water annotate from alkali lye inlet ductwork 20, regulate washing water pH value to meet emission standard.
Two, air supporting-flotation solid-liquid separation
Washing water after modified enter air-water mixing pump 6, air-water mixing pump water-in has certain negative pressure, flocculation agent and air can be sucked, flocculation agent is sucked from flocculation tank 5 while washings after conveying is modified, air is sucked from air intlet, mixing wastewater with air is completed, the process of pressure air-dissolving and medicament mixing in mixing pump.Air flotation pool, built with turbidity transducer 8, according to the turbidity of the different working condition acquiring washing water of diesel engine, automatically regulating dissolved air water amount and flocculant usage by controlling charge flow rate, ensureing that effluent quality is basically identical, playing saving medicament, saving the object of running cost.Under the acting in conjunction of the many kinds of forces such as interfacial tension, bubble rising buoyancy and hydrostaticpressure difference, be wrapped with impurity, particle, a small amount of heavy metal, greasy dirt scum silica frost (this scum silica frost is that micro bubble adheres to coagulated particles thing) float to the water surface because buoyancy is gathered in air flotation pool top, realize solid-liquid separation by dreg scraper 16, by dreg scraper 16, scum silica frost is collected into sludge tank 9.
Three, filtration, purification
Washing water after air supporting flotation enter strainer 11 through lift pump 10 and purify absorption, and the finely divided oil in water emulsion that dominant absorption washing water carry, guarantees that oily waste treatment meets emission request.Strainer regularly carries out back flushing by counter-flushing pipeline 14, absorbs and opens counter-flushing pipeline wash-down water close to time saturated, realize desorption and regeneration, and then extends the work-ing life of walnut shell filter.
By above treatment step, complete the oxide treatment of washing water sulfite salt, the adjustment of pH value, the absorption of the finely divided oil in water emulsion that the flocculation of particle, impurity thing, air supporting and washing water carry, guarantees that boats and ships washing water effluent quality meets the requirement of IMO to indexs such as the discharge of washing water discharge washing water pH, PAH, turbidity, the temperature of marine exhaust cleaning system.

Claims (5)

1. based on a marine exhaust desulfurization washing water treatment system for sodium alkali, it is characterized in that, comprise Aeration fan, neutralization oxidation integral pool, flocculation tank, air-water mixing pump, air flotation pool, lift pump and strainer;
Described neutralization oxidation integral pool is provided with wastewater inlet pipeline, alkali lye inlet ductwork, blast inlet and outlet; The blast inlet that the outlet of described Aeration fan is oxidized integral pool by pipeline and neutralization is communicated with; Described air-water mixing pump has liquid-inlet, air inlet and outlet, the liquid-inlet of this air-water mixing pump by pipeline respectively with the described outlet neutralizing outlet and the described flocculation tank being oxidized integral pool, the inlet communication of mixing wastewater with air pump outlet and air flotation pool, first outlet of air flotation pool is communicated with the entrance of lift pump, second outlet and the inlet communication of sludge tank of air flotation pool, be provided with dreg scraper in this air flotation pool; Promote the inlet communication of pump outlet and described strainer.
2., as claimed in claim 1 based on the marine exhaust desulfurization washing water treatment system of sodium alkali, it is characterized in that, described strainer is provided with counter-flushing pipeline, and strainer regularly carries out back flushing by counter-flushing pipeline, realizes desorption and regeneration.
3., as claimed in claim 1 or 2 based on the marine exhaust desulfurization washing water treatment system of sodium alkali, it is characterized in that, described strainer is walnut shell filter.
4., as claimed in claim 1 based on the marine exhaust desulfurization washing water treatment system of sodium alkali, it is characterized in that, in described air flotation pool, be provided with turbidity transducer.
5., as claimed in claim 1 based on the marine exhaust desulfurization washing water treatment system of sodium alkali, it is characterized in that, the air intlet of described air-water mixing pump is provided with under meter and air inflow control valve.
CN201420740546.6U 2014-11-28 2014-11-28 Based on the marine exhaust desulfurization washing water treatment system of sodium alkali Expired - Fee Related CN204265565U (en)

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CN104326604A (en) * 2014-11-28 2015-02-04 中国船舶重工集团公司第七一一研究所 Ship exhaust gas desulfurization wash water treatment process and treatment system based on sodium alkali method
CN109970230A (en) * 2017-12-27 2019-07-05 中国船舶重工集团公司第七一一研究所 Waste water treatment system and wastewater treatment method
US11124714B2 (en) 2020-02-19 2021-09-21 Marathon Petroleum Company Lp Low sulfur fuel oil blends for stability enhancement and associated methods
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CN104326604A (en) * 2014-11-28 2015-02-04 中国船舶重工集团公司第七一一研究所 Ship exhaust gas desulfurization wash water treatment process and treatment system based on sodium alkali method
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Effective date of registration: 20151117

Address after: 201108 Shanghai city Minhang District Huaning Road No. 3111 Building 1 room 629

Patentee after: Shanghai shine Heavy Industry Co., Ltd.

Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111

Patentee before: The 711th Research Institute of China Shipbuilding Industrial Corporation(CSIC)

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150415

Termination date: 20161128