CN204237664U - A kind of energy-conservation difficult for biological degradation organic waste water advanced treatment system - Google Patents
A kind of energy-conservation difficult for biological degradation organic waste water advanced treatment system Download PDFInfo
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- CN204237664U CN204237664U CN201420739011.7U CN201420739011U CN204237664U CN 204237664 U CN204237664 U CN 204237664U CN 201420739011 U CN201420739011 U CN 201420739011U CN 204237664 U CN204237664 U CN 204237664U
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Abstract
A kind of energy-conservation difficult for biological degradation organic waste water advanced treatment system, this system comprises forward osmosis membrane concentrating unit and multiple-effect evaporator, forward osmosis membrane concentrating unit comprises the airtight commuting case of FO film, draw liquid recycle device and clean water recovery device, the airtight commuting case of FO film at least arranges one-level, draw liquid recycle device to be connected respectively by electrically operated valve with the airtight commuting case of FO films at different levels, clean water recovery device with draw liquid recycle device and be connected, the airtight commuting case of FO films at different levels is connected by discharge opeing electrically operated valve successively, and be all connected with mother liquor incinerator by surmounting electrically operated valve.This system is for the high osmotic pressure characteristic of difficult for biological degradation organic waste water, by preparation colligative property higher draw liquid, the permeable pressure head utilizing colligative property of solution difference to bring, recycle and reuse water resources while making difficult for biological degradation organic waste water obtain efficient concentration, produces electric energy; Operational process realizes automatic interlock and controls, can according to different flow condition adjust operation mode.
Description
Technical field
The utility model relates to a kind of advanced treatment system for difficult for biological degradation organic waste water, belongs to waste water advanced Treatment process field.
Background technology
Water pollution problems is one of main Environmental Problems of facing of China.According to statistics, trade effluent has accounted for more than 70 percent of total sewage quantity, and in trade effluent, the overwhelming majority all belongs to the organic waste water of high density.High concentrated organic wastewater is mainly derived from the waste water of COD concentration at more than 2000mg/L of the industry discharges such as papermaking, leather, food and chemical industry, be called as the organic waste water of difficult degradation in organic waste water containing the polluted water of biodegradable organic compounds, hardly degraded organic substance is commonly referred to as under microorganism or specified conditions all can not fast decoupled or decompose halfway organism.The form always enrichment that this pollutant exists in vivo, causes potential danger and pollution to water body.
The chemical structure existed according to Organic Pollutants In Water and the difference of its characteristic, people are mainly divided into following classification the organic pollutant of difficult degradation: the aliphatic hydrocarbon of halo and ester, organic chlorinated compound, the compound with mono-cyclic aromatic character, phenols and cresols class etc.
The feature that organic wastewater with difficult degradation thereby generally has all comprises the following aspects, and namely the structure of comparatively strong, the pollutent of the toxicity of relatively large, the pollutent of the molecular weight of pollutent and composition relative complex, pollutent are present in that chemical oxygen demand (COD) in water body is general higher, these pollutents cannot effectively decompose by the simple microorganism existed in water body.And extended residual in water body, biological accumulation, half volatile and high toxicity are the principal features of pollutent in these difficult degradation organic chemical waste waters.The organism of high density, difficult degradation why can concentration in organism in water body increasing be because the character of its high liposoluble.In addition, for some special high density, biodegradable organic compounds, the volatility of himself is a large feature, therefore can drift about arbitrarily at occurring in nature, will be larger to the intractability of this pollutent.
The harm of high concentration hard-degraded organic waste water is mainly reflected in it in the harm of human body and environment, such source of pollution all have carcinogenic or toxicity, and through years of researches, people have summed up high density, organic wastewater with difficult degradation thereby to the main harm of human body, and the degree difference according to harm can be divided into acute hazard, chronic hazard and potential hazard.
Acute hazard refers to can just to embody at short notice after human body contacts with this kind of material falls ill or the feature of intoxicating; And this kind of source of pollution to the chronic hazard of human body mainly refer to human body through with the Long Term Contact of this kind of material after, and this toxoid have accumulated in vivo a certain amount of after just there will be the feature of pathology, to be therefore also called savings poisoning in chronic hazard.
Because high density difficult for biological degradation organic waste water is serious and intractability large to water environment pollution degree, therefore the research of high density difficult for biological degradation Technologies for Organic Wastewater Treatment is the emphasis of water technology research always.Through years of researches and summary, people have had more deep understanding to high density, organic wastewater with difficult degradation thereby, also the major measure of this kind of waste water of effective process has been probed into out, general be all following some: chemical oxidization method, solvent extration, absorption method, photocatalytic method and biochemical treatment process etc., wherein biologic treating technique better economy in the industry organic waste waters such as process agricultural chemicals, pharmacy, printing, and can not secondary pollution be produced.Applying biological treatment technology carries out high concentration hard-degraded organic waste water process, and its method is mainly aerobe, anaerobe, enzyme biologic treating technique and fermentation engineering.Chemical treatment method is then build on the basis of the principles of chemistry and chemical action, change pollutant component in high density difficult for biological degradation organic waste water into innoxious substance, reach the object of purifying liquid waste, conventional method is burning method, catalytic oxidation, electrochemical oxidation process etc.
Pollutants in Wastewater, when processing high density waste water difficult for biological degradation process, is realized purification target by phase transition change by materializing strategy technology, comparatively extensive with extraction process application.It is lower, simple to operate that extraction process carries out its cost of high concentration hard-degraded organic waste water, can efficient recovery principal pollutant, and the application of especially pulse extraction technology, its effect is better.
The existence of these methods opens new road to the process of high density, difficult degradation organic chemical waste water, but these methods also have the relative merits of himself.
Chinese patent literature CN102381812A is disclosed, and " one utilizes O
3the method of catalyzed oxidation advanced treatment difficult for biological degradation organic waste water and device ", CN103539296A disclosed " method of process high density difficult for biological degradation organic waste water and device thereof " and CN1264761C disclosed " difficult for biological degradation method for processing organic wastewater and device thereof ", complex technical process, cost is high, and treatment effect has much room for improvement.
For this reason, be necessary the characteristic reanalysing difficult for biological degradation organic waste water, on the basis of biochemical treatment, develop energy-conservation, efficient difficult for biological degradation organic waste water further treatment technique.
Osmosis be the solution of two kinds of different concns every with semi-permeable membranes (allow solvent molecule pass through, do not allow the film that solute molecule passes through), water molecules or other solvent molecule to enter the phenomenon highly concentrated solution by semi-permeable membranes from the solution of lower concentration.Its condition occurred has two: one to be have semi-permeable membranes, and two is that semi-permeable membranes both sides have substance withdrawl syndrome poor.
Osmosis can be divided into again just permeates (FO), reverse osmosis (RO) and pressure damping infiltration (PRO).
(FO) process of just permeating is for motivating force with the permeable pressure head of semi-permeable membranes both sides, water molecules in solution is transmitted to low water chemistry gesture district (high ion concentration solution) from high water chemistry gesture district (low ion concns solution) by semi-permeable membranes, and solute molecule or ion are by a kind of process of osmosis stopped.
Reverse osmosis (RO) process is a kind of is impellent with pressure difference, isolates the membrane sepn operation of solvent from solution.Because it is contrary with the direction just permeated, therefore claims reverse osmosis.The osmotic pressure difference of different material can be utilized, use the reverse osmosis pressure being greater than osmotic pressure, reach separation, extraction, purifying and concentrated object.
Pressure damping infiltration (PRO) is between just permeating the pilot process with reverse osmosis process, refer to and apply pressure in the opposite direction of permeable pressure head, similar to reverse osmosis process, but water molecules remains and is diffused into high ion concentration side, similar to positive process of osmosis.
The colligative property of dilute solution (comprising difficult for biological degradation organic waste water) refers to the numerical value of the vapor pressure lowering of solvent in dilute solution, depression of the freezing point, the elevation of boiling point and osmotic pressure, only relevant with the amount of solute in solution, have nothing to do with the person's character of solute, colligative property of solution draws liquid for exploitation special type and provides theoretical foundation, as long as namely configuration is necessarily colligative draw liquid, make its osmotic pressure higher than pending difficult for biological degradation organic waste water, utilize osmosis, just difficult for biological degradation organic waste water can be concentrated further.
For this reason, need badly on the basis of biochemical treatment, develop energy-conservation difficult for biological degradation organic waste water advanced treatment system, osmosis is utilized especially just to permeate the permeable pressure head that (FO) acts on and colligative property of solution difference is brought, realize that difficult for biological degradation organic waste water is effectively disposed, while recycle water resources, make full use of the pressure reduction acquisition electric energy just permeating (FO) and produce, save energy.
Summary of the invention
The deficiency that the utility model exists for existing difficult for biological degradation Technologies for Organic Wastewater Treatment, according to the characteristic of difficult for biological degradation organic waste water after biochemical treatment, utilize colligative property of solution, the difficult for biological degradation organic waste water advanced treatment system providing a kind for the treatment of effect good, energy-conservation.There is provided this system a kind of to the deep treatment method of difficult for biological degradation organic waste water simultaneously.
Energy-conservation difficult for biological degradation organic waste water advanced treatment system of the present utility model, by the following technical solutions:
This system, comprise forward osmosis membrane concentrating unit and mother liquor incinerator, forward osmosis membrane concentrating unit comprises the airtight commuting case of FO film, draws liquid recycle device and clean water recovery device, the airtight commuting case of FO film at least arranges one-level, draw liquid recycle device to be connected respectively by electrically operated valve with the airtight commuting case of FO films at different levels, clean water recovery device with draw liquid recycle device and be connected, the airtight commuting case of FO films at different levels is connected by discharge opeing electrically operated valve successively, and is all connected with mother liquor incinerator by surmounting electrically operated valve.Mother liquor incinerator is supporting combustion-supporting fuel (Sweet natural gas, diesel oil or coke-oven gas etc.) burner and exhaust gas cleaner.
The inside of the airtight commuting case of FO film arranges membrane element, and airtight for FO film commuting case inside is divided into mother liquor district and draws liquid zone by membrane element, and the top in mother liquor district is provided with water inlet pipe, this water inlet pipe is provided with into water electrically operated valve; In the airtight commuting case of upper level FO film, the bottom in mother liquor district is connected with the top in mother liquor district in the airtight commuting case of next stage FO film by discharge opeing electrically operated valve, and in every airtight commuting case of one-level FO film, the bottom in mother liquor district is all connected with mother liquor incinerator by surmounting electrically operated valve simultaneously; The top of drawing liquid zone in the airtight commuting case of every one-level FO film is connected with the liquid commuting case that draws drawn in liquid recycle device respectively by drawing liquid transfer lime, respective draw liquid transfer lime is provided with draw liquid outlet electric valve door; The bottom of drawing liquid zone in the airtight commuting case of every one-level FO film is provided with draws liquid compensation electrically operated valve, and with draw drawing between liquid compensation box in liquid recycle device and be connected by drawing liquid offsetting pipe, draw liquid offsetting pipe is connected with and draw liquid compensated pump.
The outer setting drawing liquid zone have connect draw upper and lower, liquid zone draw liquid circulation tube, draw liquid circulation tube is provided with and draw liquid recycle pump.By draw liquid recycle pump will draw liquid drawing upper and lower, liquid zone formed circulation.
Mother liquor district is provided with agitator and temperature control equipment with drawing in liquid zone.
Mother liquor district is provided with COD on-line computing model, draws liquid zone and is provided with ionometer.
Draw liquid recycle device comprise draw liquid commuting case, draw liquid intermediate box, draw liquid multiple-effect evaporator, draw liquid dissolve case, draw liquid compensation box and molten medicine-chest, draw liquid commuting case top and be provided with commuting case electrically operated valve and commuting case electric-powered air release valve, and by commuting case electrically operated valve with draw liquid intermediate box and be connected; The bottom of drawing liquid commuting case is surmounted pipe electrically operated valve by commuting case and is drawn liquid intermediate box and be connected; Draw liquid intermediate box top and be provided with intermediate box electric-powered air release valve, draw liquid intermediate box and draw liquid multiple-effect evaporator and be connected; Draw liquid to dissolve case and draw liquid multiple-effect evaporator and be connected; The bottom of drawing liquid compensation box is connected with the bottom of drawing liquid and dissolve case by compensation box import electrically operated valve; The bottom of molten medicine-chest is connected with the bottom of drawing liquid compensation box by molten medicine outlet electric valve door.
Draw in liquid dissolving case and molten medicine-chest and be provided with agitator and ionometer.
Draw in liquid compensation box and be provided with ionometer.
Clean water device comprises filtered water tank, fresh water pump and clear water pipe, filtered water tank with draw liquid multiple-effect evaporator and be connected, clear water pipe is connected with filtered water tank, and fresh water pump is connected on clear water pipe, and clear water pipe is connected with molten medicine-chest.
Said system, also comprise infiltration energy utilization device, this device comprises airtight rotor casing and turbine generation unit, turbine wheel is provided with in rotor casing, turbine wheel is connected with turbine generation unit, the bottom of rotor casing is provided with rotor casing electric-powered air release valve, rotor casing by rotor casing water inlet electrically operated valve with draw liquid commuting case and be connected, while rotor casing also with draw liquid intermediate box and be connected.
The treatment process of said system, is:
First amount concentration (the ionic state amount of substance in solution and the molecular state amount of substance sum) S of the permeate substance of analytical calculation difficult for biological degradation organic waste water
1according to required seepage water pressure (△ π, by whether waiting actual demand decision for generating electricity), (in operational process with COD on-line computing model display data approximate conversion), show that the airtight commuting case of required first step FO film draws the ionic concn J of liquid
1, J
1be greater than S
1, and draw the progression n of the airtight commuting case of FO film of needs and the number i of every grade of airtight commuting case of FO film; Then by drawing liquid recycle device preparation ionic concn J
1draw liquid, make to draw liquid and be full of the airtight commuting case of first step FO film; Open difficult for biological degradation organic waste water water inlet electrically operated valve, difficult for biological degradation organic waste water flows in the airtight commuting case of first step FO film, with draw liquid and exchange, water molecules in difficult for biological degradation organic waste water is freely reached and draws liquid, what after dilution, volume increased draw liquid realizes drawing being separated of liquid solute (being generally gas) and water (solvent) by drawing multiple-effect evaporator in liquid recycle device, realize the recovery and reuse of drawing liquid solute, unnecessary water enters clean water device, realizes the recycling of water resources; Difficult for biological degradation organic waste water is concentrated by the airtight commuting case of FO film step by step, finally cannot reconcentration or enter mother liquor incinerator without the need to the mother liquor of concentrated when more than 600000mg/L (general COD) further as required and carry out burning disposal.
The utility model is for the high osmotic pressure characteristic of difficult for biological degradation organic waste water, by preparation colligative property higher draw liquid, the permeable pressure head utilizing colligative property of solution difference to bring, while making difficult for biological degradation organic waste water obtain efficient concentration, recycle and reuse water resources, produces electric energy; Meanwhile, operational process realizes automatic interlock and controls, and can, according to different flow condition adjust operation mode, be convenient to implement.There is following characteristics:
1. make full use of colligative property of solution, by preparation colligative property higher draw liquid (as NH
4hCO
3deng), utilize the Thief zone pressure reduction of itself and difficult for biological degradation organic waste water, while realizing difficult for biological degradation organic waste water efficient concentration, recyclable great lot of water resources;
2. it is large that the FO film adopted has membrane flux, and the characteristic that concentration polarization phenomenon is few, can ensure the smooth realization of infiltration function;
3. the mother liquor incinerator adopted is general-purpose equipment, and special disposal high concentrated organic waste liquid, utilizes high temperature (850-1100 DEG C) pyrolysis, can organism fully in decomposing wasting liquid and chloride, benzene, phenols hazardous compound, and has following characteristics:
(1) tiny structure design, combustion safety is high, is provided with in stove the function do not got rid of flammable explosive gas before igniting and just can not light a fire, with gas explosion-proof in sequence of control;
(2) level of automation is high, comprehensive online detection and control, flameholding.
(3) adopt atomizing lance, spray imperceptible particle, ensure to gasify in the air in stove, oxygenolysis, can not drip.
(4) tangent line combustion atomization device internal mix formula twin fluid atomization device is adopted, its degree of mixing, atomizing effect combustionvelocity
High, surplus air is low, can save a large amount of fuel.
(5) venturi effect is good, and the burning residence time reaches more than 2 seconds, and burning is without dead angle.
(6) low-NO_x combustion technology, smokeless and odorless, without obnoxious flavour, can burn organic exhaust gas and a small amount of solid simultaneously.
(7) comprehensive rational vent gas treatment refining plant, ensures that environment protection emission is up to standard.
4. the osmotic energy that system produces can be converted into electric energy by the infiltration energy utilization device adopted, thus reduces cost for wastewater treatment;
5. make operational process realize automatic interlock by automation instrument to control, be convenient to according to different flow condition adjust operation mode;
6. modular design, can according to difficult for biological degradation organic waste water actual concentrations and other implementation conditions, and independent assortment, has stronger handiness.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the energy-efficient difficult for biological degradation organic wastewater treating system of the utility model.
In figure: 1, water inlet electrically operated valve, 2, the airtight commuting case of FO film, 3, difficult for biological degradation organic waste water agitator, 4, draw liquid agitator, 5, film frame, 6, membrane element, 7, difficult for biological degradation organic waste water COD on-line computing model, 8, draw liquid ionometer, 9, temperature control equipment, 10, draw liquid delivery gauge, 11, draw liquid outlet electric valve door, 12, draw liquid recycle pump, 13, draw liquid commuting case, 14, commuting case tensimeter, 15, commuting case electrically operated valve, 16, airtight rotor casing, 17, turbine wheel, 18, turbine generation unit, 19, draw liquid intermediate box, 20, intermediate box electric-powered air release valve, 21, draw liquid multiple-effect evaporator, 22, intermediate box upflow tube, 23, draw liquid and dissolve case, 24, dissolve box mixer, 25, dissolve case ionometer, 26, compensation box import electrically operated valve, 27, draw liquid compensation box, 28, compensation box ionometer, 29, molten medicine outlet electric valve door, 30, molten medicine-chest, 31, molten medicine agitator, 32, draw liquid ionometer, 33, air-washer, 34, filtered water tank, 35, fresh water pump, 36, the first step surmounts pipe electrically operated valve, and 37, discharge opeing electrically operated valve, 38, the second stage surmounts pipe electrically operated valve, and 39, mother liquor incinerator import electrically operated valve, 40, mother liquor incinerator, 41, draw liquid compensated pump, 42, draw liquid and compensate electrically operated valve, 43, commuting case surmounts pipe electrically operated valve, and 44, water supply pipe, 45, commuting case electric-powered air release valve, 46, rotor casing electric-powered air release valve, 47, rotor casing water inlet electrically operated valve, 48, baffle, 49, combustion-supporting fuel burner, 50, exhaust gas cleaner.
Embodiment
Energy-efficient difficult for biological degradation organic wastewater treating system of the present utility model mainly comprises forward osmosis membrane concentrating unit, mother liquor incinerator 40 and infiltration energy utilization device, and each device is connected successively by pipeline.The concrete structure of each device as shown in Figure 1.
Forward osmosis membrane concentrating unit, comprises the airtight commuting case 2 (being provided with 3 grades in Fig. 1) of at least one-level FO film, draws liquid recycle device and clean water recovery device.
The bosom of the airtight commuting case 2 of single-stage FO film is provided with film frame 5, is provided with membrane element 6 in film frame 5.Airtight for FO film commuting case 2 is divided into mother liquor district, left side (difficult for biological degradation organic waste pool) and right side to draw liquid zone two portions by film frame 5, and twoth district are complete isolated area, only carry out mass transfer by membrane element 6.The top in mother liquor district is provided with difficult for biological degradation organic waste water water inlet pipe, this water inlet pipe is provided with into water electrically operated valve 1, difficult for biological degradation organic waste water agitator 3, difficult for biological degradation organic waste water COD on-line computing model 7 and temperature control equipment 9 (being arranged on bottom mother liquor district) is provided with in mother liquor district, temperature control equipment 9 can be electric drive, also can be interchanger.Draw in liquid zone to be provided with and draw liquid agitator 4, draw liquid ionometer 8 and well heater (be arranged on and draw bottom liquid zone), the outer setting drawing liquid zone have connect its upper and lower draw liquid circulation tube, draw liquid circulation tube is provided with and draw liquid recycle pump 12, liquid being drawn drawing the formation circulation of upper and lower, liquid zone by drawing liquid recycle pump 12, accelerating mass transfer.
In the airtight commuting case of upper level FO film 2, the bottom in mother liquor district is connected with the top in mother liquor district in the airtight commuting case of next stage FO film by liquid discharge pipe, liquid discharge pipe is provided with discharge opeing electrically operated valve 37, in every airtight commuting case of one-level FO film, the bottom of concentrated liquid zone is all connected with mother liquor incinerator 40 by surmounting pipe simultaneously, surmount and pipe arranges electrically operated valve (surmount pipe electrically operated valve 36 as the first step in Fig. 1 and the second stage surmounts pipe electrically operated valve 38), surmount pipe and be connected with mother liquor incinerator 40 by mother liquor incinerator import electrically operated valve 39.Supporting on mother liquor incinerator 40 have combustion-supporting fuel (Sweet natural gas, diesel oil or coke-oven gas etc.) burner 49 and exhaust gas cleaner 50.The top of drawing liquid zone in the airtight commuting case of every one-level FO film is connected with the airtight liquid commuting case 13 that draws respectively by drawing liquid transfer lime, respective draw liquid transfer lime is provided with draw liquid delivery gauge 10 and draw liquid outlet electric valve door 11.The bottom of drawing liquid zone in the airtight commuting case of every one-level FO film is provided with draws liquid compensation electrically operated valve 42, and be connected by drawing liquid offsetting pipe with drawing between liquid compensation box 27, draw liquid offsetting pipe is connected with and draw liquid compensated pump 41, draw on liquid compensation box 27 and be provided with compensation box ionometer 28.
Draw liquid recycle device to comprise and draw liquid commuting case 13, draw liquid intermediate box 19, draw liquid multiple-effect evaporator 21, draw liquid and dissolve case 23, draw liquid compensation box 27 and molten medicine-chest 30, draw liquid commuting case 13, draw liquid intermediate box 19, draw liquid multiple-effect evaporator 21, draw liquid and dissolve case 23 and to draw liquid compensation box 27 be all airtight.It is airtight for drawing liquid commuting case 13, and its top is provided with commuting case tensimeter 14, commuting case electrically operated valve 15 and commuting case electric-powered air release valve 45, and is connected with the top of drawing liquid intermediate box 19 by commuting case electrically operated valve 15; The bottom of drawing liquid commuting case 13 surmounts pipe electrically operated valve 43 by commuting case and is connected with the bottom of drawing liquid intermediate box 19.Draw liquid intermediate box 19 inside and be provided with baffle 48, its top is provided with intermediate box electric-powered air release valve 20.Draw liquid intermediate box 19 and draw liquid multiple-effect evaporator 21 bottom and be connected, and top is connected with intermediate box upflow tube 22.Draw liquid to dissolve case 23 and draw liquid multiple-effect evaporator 21 and be connected, draw liquid and dissolve in case 23 to be provided with and dissolve box mixer 24 and dissolve case ionometer 25, draw bottom liquid dissolving case 23 and be connected with air-washer 33 (scrubber tower).The bottom of drawing liquid compensation box 27 is connected with the bottom of drawing liquid and dissolve case 23 by compensation box import electrically operated valve 26, draws in liquid compensation box 27 and is provided with compensation box ionometer 28.The bottom of molten medicine-chest 30 is connected with the bottom of drawing liquid compensation box 27 by molten medicine outlet electric valve door 29, and molten medicine-chest 30 is connected with water supply pipe 44, and is provided with molten medicine agitator 31 in it and draws liquid ionometer 32.Multiple-effect evaporator is general-purpose equipment.
Clean water device comprises filtered water tank 34, fresh water pump 35 and clear water pipe, filtered water tank 34 with draw liquid multiple-effect evaporator 21 and be connected, clear water pipe is connected with filtered water tank 34, and fresh water pump 35 is connected on clear water pipe.Clear water pipe is connected with molten medicine-chest 30 by valve, to utilize the clear water drawing liquid multiple-effect evaporator 21 generation.
Infiltration energy utilization device, comprise airtight rotor casing 16 and turbine generation unit 18, be provided with turbine wheel 17 in rotor casing 16, turbine wheel 17 is connected with turbine generation unit 18, and the bottom of rotor casing 16 is provided with rotor casing electric-powered air release valve 46.Rotor casing 16 by rotor casing water inlet electrically operated valve 47 with draw liquid commuting case 13 and be connected, while also with draw liquid intermediate box 19 and be connected.
The operational process of said system, as described below.
Before operation, first determine following several important parameters:
1, the osmotic pressure π (difficult for biological degradation organic waste water) of the front difficult for biological degradation organic waste water of process
First carry out detection to difficult for biological degradation organic waste water before process to analyze, calculate amount concentration (the ionic state amount of substance molecular state amount of substance sum in the solution) (S of permeate substance wherein
1, with molL
-1meter), adopt Fan Tuofu (van ' t Hoff) formulae discovery to draw the osmotic pressure π (difficult for biological degradation organic waste water) of difficult for biological degradation organic waste water before process:
π (difficult for biological degradation organic waste water)=c
brT ≈ S
1rT
Wherein: π (difficult for biological degradation organic waste water) is the osmotic pressure of difficult for biological degradation organic waste water before process;
Concerning electrolyte solution, c
bsolute molecule and the total amount of substance of ion that osmotic effect in 1L solution, can be produced, c herein
b≈ S
1, be called the amount concentration of permeate substance;
R is gas law constant;
T is absolute temperature.
In operational process, the amount concentration of the permeate substance in FO films at different levels airtight commuting case mother liquor district (or claiming concentrated liquid zone) is by the approximate conversion of the waste water COD on-line computing model display data that it is arranged;
2, the airtight commuting case of first step FO film draws the ionic concn J of liquid
1
According to required permeable pressure head (△ π by whether determines for the actual demand such as to generate electricity), adopt Fan Tuofu (van ' t Hoff) formula π=c
brT calculates the ionic concn J that the airtight commuting case of required first step FO film draws liquid
1:
J
1≈ c
b=π (drawing liquid)/RT
π (drawing liquid)=π (difficult for biological degradation organic waste water)+△ π
π (difficult for biological degradation organic waste water) ≈ S
1rT
Wherein, π (drawing liquid) for drawing the osmotic pressure of liquid, the osmotic pressure that π (difficult for biological degradation organic waste water) is difficult for biological degradation organic waste water;
Concerning electrolyte solution, c
bsolute molecule and the total amount of substance of ion that osmotic effect in 1L solution, can be produced, c herein
b≈ J
1, be called the amount concentration of permeate substance;
R is ideal gas constant;
T is absolute temperature.
In operational process, the airtight commuting case of FO films at different levels draws the amount concentration of the permeate substance of liquid zone by the waste water ionometer display data proximate calculation that it is arranged;
For raising the efficiency, generally adopting and drawing liquid close to saturation concentration.
3, the progression n (serial number) of the airtight commuting case of FO film
To draw the ionic concn J of liquid
1for the saturation concentration drawing liquid solute under normal temperature and pressure conditions is example, its osmotic pressure is definite value π (drawing liquid)
saturated;
Due to the effect of agitator and recycle pump, with the airtight commuting case of one-level FO film mother liquor (or claiming concentrated solution) concentration and draw liquid concentration and can think homogeneous;
When system is normally run, along with constantly concentrating of mother liquor (or claiming concentrated solution), the amount concentration of the mother liquor district permeate substance of the airtight commuting case of FO film not at the same level can be more and more higher, and S
n+1> S
n(S
nbe the amount concentration of permeate substance in the mother liquor of n-th grade of airtight commuting case of FO film, n is the progression of the airtight commuting case of FO film), it also can reduce gradually with the permeable pressure head △ π drawing liquid, in theory, works as S
nclose to the saturation concentration of mother liquor solute, close to when drawing liquid ionic concn J1 and equal to draw liquid ionic concn J1, the mother liquor of FO film both sides and draw liquid and there is not permeable pressure head △ π, now the progression of the airtight commuting case of FO film is the greatest measure of n.
The reduction of permeable pressure head △ π can affect membrane flux and osmotic efficiency, the work of generator also can be affected during for generating electricity, for this reason, the practical factor such as pressure needed for membrane flux, osmotic efficiency and generator impeller, comprehensively determines the progression n of the airtight commuting case of FO film usually.
4, the number i (quantity in parallel) of every grade of airtight commuting case of FO film
The number i of every grade of airtight commuting case of FO film is estimated by following formula:
i＝Q/(Q’·S)。
Wherein: Q is wastewater treatment scale (m
3s
-1);
Q ' is FO membrane flux (m
3s
-1m
-2);
S is effective forward osmosis membrane area (m of the airtight commuting case of single FO film
2).
Determine above-mentioned important parameter, mean the configuration of the system of determining.
Open water supply pipe 44, make to add tap water in molten medicine-chest 30, and in molten medicine-chest 30, pouring liquid drawing liquor into, (the amount concentration of permeate substance is J
0, J
0> J
1, market purchasing) or solid draw liquid solute powder (market purchasing), stirred by molten medicine agitator 31, preparation ionic concn is J
1draw liquid, by draw liquid ionometer 32 detect preparation draw liquid ionic concn.Open molten medicine outlet electric valve door 29, make to draw liquid inflow and draw liquid compensation box 27, then the liquid that draws opening the first step successively compensates electrically operated valve 42 and draws liquid compensated pump 41, make to draw liquid and be full of the airtight commuting case 2 of first step FO film, then successively close draw liquid compensated pump 41, the first step draw liquid compensate electrically operated valve 42, molten medicine outlet electric valve door 29 and molten medicine agitator 31, check simultaneously and determine that all the other electrically operated valves are all in closing condition, each vent valve is in opened condition, finally carries out the process preparation work before system cloud gray model.
After above-mentioned job done, open difficult for biological degradation organic waste water water inlet electrically operated valve 1, difficult for biological degradation organic waste water flows into the mother liquor district of the airtight commuting case 2 of first step FO film, because the ionic concn (J of liquid zone is drawn in membrane element 6 side
1) be greater than the amount concentration (S of the permeate substance in mother liquor district
1) permeable pressure head (△ π) that formed, water molecules in mother liquor district difficult for biological degradation organic waste water is freely reached through membrane element 6 and draws liquid zone, be closed structure owing to drawing liquid zone, what after dilution, volume increased draw liquid can enter and airtight draws liquid commuting case 13 by drawing liquid offsetting pipe.Draw after liquid commuting case 13 is full of, close commuting case electric-powered air release valve 45.Draw liquid as utilized to generate electricity, then close commuting case and surmount pipe electrically operated valve 43, open rotor casing water inlet electrically operated valve 47, rare after dilution draws liquid, and (ionic concn is J
1', J
1' < J
1) enter airtight rotor casing 16, promote turbine wheel 17 and do work, export electric energy by turbine generation unit 18, rare after generating draws liquid and enters and draw liquid intermediate box 19.As without the need to generating, then close rotor casing water inlet electrically operated valve 47, open commuting case and surmount pipe electrically operated valve 43, make rare liquid that draws enter and draw liquid intermediate box 19, then enter and draw liquid multiple-effect evaporator 21.By multiple-effect evaporator 21, being separated of liquid solute (being generally gas) and water (solvent) is drawn in realization, solute wherein enters and draws liquid dissolving case 23, open and dissolve box mixer 24, utilize dissolving case ionometer 25 to control strength of solution, realize the recovery and reuse of drawing liquid solute; Unnecessary water enters filtered water tank 34, is delivered to molten medicine-chest 30 or is back to plant area that other is arranged with water by fresh water pump 35, realizes the recycling of water resources.
Difficult for biological degradation organic waste water after concentrated enters the airtight commuting case of FO film of next stage step by step by discharge opeing electrically operated valve 37, by above-mentioned process flow operation.Every grade of airtight commuting case of FO film utilizes the temperature control equipment 9 bottom it, the temperature of conservative control difficult for biological degradation organic waste water, the saturation concentration under making its concentration reach this temperature.Finally cannot reconcentration or enter mother liquor incinerator 40 without the need to the mother liquor of concentrated when more than 600000mg/L (general COD) further as required and carry out burning disposal.
Claims (9)
1. an energy-conservation difficult for biological degradation organic wastewater treating system, comprise forward osmosis membrane concentrating unit and mother liquor incinerator, it is characterized in that: forward osmosis membrane concentrating unit comprises the airtight commuting case of FO film, draw liquid recycle device and clean water recovery device, the airtight commuting case of FO film at least arranges one-level, draw liquid recycle device to be connected respectively by electrically operated valve with the airtight commuting case of FO films at different levels, clean water recovery device with draw liquid recycle device and be connected, the airtight commuting case of FO films at different levels is connected by discharge opeing electrically operated valve successively, and be all connected with mother liquor incinerator by surmounting electrically operated valve.
2. energy-conservation difficult for biological degradation organic wastewater treating system according to claim 1, it is characterized in that: the inside of the airtight commuting case of described FO film arranges membrane element, airtight for FO film commuting case inside is divided into mother liquor district and draws liquid zone by membrane element, the top in mother liquor district is provided with water inlet pipe, this water inlet pipe is provided with into water electrically operated valve; In the airtight commuting case of upper level FO film, the bottom in mother liquor district is connected with the top in mother liquor district in the airtight commuting case of next stage FO film by discharge opeing electrically operated valve, and in every airtight commuting case of one-level FO film, the bottom in mother liquor district is all connected with mother liquor incinerator by surmounting electrically operated valve simultaneously; The top of drawing liquid zone in the airtight commuting case of every one-level FO film is connected with the liquid commuting case that draws drawn in liquid recycle device respectively by drawing liquid transfer lime, respective draw liquid transfer lime is provided with draw liquid outlet electric valve door; The bottom of drawing liquid zone in the airtight commuting case of every one-level FO film is provided with draws liquid compensation electrically operated valve, and with draw drawing between liquid compensation box in liquid recycle device and be connected by drawing liquid offsetting pipe, draw liquid offsetting pipe is connected with and draw liquid compensated pump.
3. energy-conservation difficult for biological degradation organic wastewater treating system according to claim 2, is characterized in that: described in draw liquid zone outer setting have connect draw upper and lower, liquid zone draw liquid circulation tube, draw liquid circulation tube is provided with and draw liquid recycle pump.
4. energy-conservation difficult for biological degradation organic wastewater treating system according to claim 2, is characterized in that: described mother liquor district is provided with agitator and temperature control equipment with drawing in liquid zone; Mother liquor district is provided with COD on-line computing model, draws liquid zone and is provided with ionometer.
5. energy-conservation difficult for biological degradation organic wastewater treating system according to claim 1, it is characterized in that: described in draw liquid recycle device comprise draw liquid commuting case, draw liquid intermediate box, draw liquid multiple-effect evaporator, draw liquid dissolve case, draw liquid compensation box and molten medicine-chest, draw liquid commuting case top and be provided with commuting case electrically operated valve and commuting case electric-powered air release valve, and by commuting case electrically operated valve with draw liquid intermediate box and be connected; The bottom of drawing liquid commuting case is surmounted pipe electrically operated valve by commuting case and is drawn liquid intermediate box and be connected; Draw liquid intermediate box top and be provided with intermediate box electric-powered air release valve, draw liquid intermediate box and draw liquid multiple-effect evaporator and be connected; Draw liquid to dissolve case and draw liquid multiple-effect evaporator and be connected; The bottom of drawing liquid compensation box is connected with the bottom of drawing liquid and dissolve case by compensation box import electrically operated valve; The bottom of molten medicine-chest is connected with the bottom of drawing liquid compensation box by molten medicine outlet electric valve door.
6. energy-conservation difficult for biological degradation organic wastewater treating system according to claim 5, is characterized in that: described in draw liquid and dissolve in case and molten medicine-chest and be provided with agitator and ionometer.
7. energy-conservation difficult for biological degradation organic wastewater treating system according to claim 5, is characterized in that: described in draw in liquid compensation box and be provided with ionometer.
8. energy-conservation difficult for biological degradation organic wastewater treating system according to claim 1, it is characterized in that: described clean water device comprises filtered water tank, fresh water pump and clear water pipe, filtered water tank with draw liquid multiple-effect evaporator and be connected, clear water pipe is connected with filtered water tank, fresh water pump is connected on clear water pipe, and clear water pipe is connected with molten medicine-chest.
9. energy-conservation difficult for biological degradation organic wastewater treating system according to claim 1, it is characterized in that: also comprise infiltration energy utilization device, this device comprises airtight rotor casing and turbine generation unit, turbine wheel is provided with in rotor casing, turbine wheel is connected with turbine generation unit, the bottom of rotor casing is provided with rotor casing electric-powered air release valve, rotor casing by rotor casing water inlet electrically operated valve with draw liquid commuting case and be connected, while rotor casing also with draw liquid intermediate box and be connected.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104326616A (en) * | 2014-11-28 | 2015-02-04 | 山东省环科院环境工程有限公司 | Energy-saving fine chemical wastewater deep treatment system and treatment method |
| CN104326617A (en) * | 2014-11-28 | 2015-02-04 | 康兴生 | Energy-saving deep treatment system and method for non-biodegradable organic wastewater |
| CN104402161A (en) * | 2014-11-28 | 2015-03-11 | 山东省环科院环境工程有限公司 | Energy-saving petrochemical engineering wastewater deep treatment system and treatment method thereof |
| CN104402092A (en) * | 2014-11-28 | 2015-03-11 | 山东省环科院环境工程有限公司 | Energy-saving comprehensive chemical wastewater deep treatment system and treatment method thereof |
| CN104402160A (en) * | 2014-11-28 | 2015-03-11 | 山东省环科院环境工程有限公司 | Energy-saving coal chemical engineering wastewater deep treatment system and treatment method thereof |
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2014
- 2014-11-28 CN CN201420739011.7U patent/CN204237664U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104326616A (en) * | 2014-11-28 | 2015-02-04 | 山东省环科院环境工程有限公司 | Energy-saving fine chemical wastewater deep treatment system and treatment method |
| CN104326617A (en) * | 2014-11-28 | 2015-02-04 | 康兴生 | Energy-saving deep treatment system and method for non-biodegradable organic wastewater |
| CN104402161A (en) * | 2014-11-28 | 2015-03-11 | 山东省环科院环境工程有限公司 | Energy-saving petrochemical engineering wastewater deep treatment system and treatment method thereof |
| CN104402092A (en) * | 2014-11-28 | 2015-03-11 | 山东省环科院环境工程有限公司 | Energy-saving comprehensive chemical wastewater deep treatment system and treatment method thereof |
| CN104402160A (en) * | 2014-11-28 | 2015-03-11 | 山东省环科院环境工程有限公司 | Energy-saving coal chemical engineering wastewater deep treatment system and treatment method thereof |
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