CN105261808B - A kind of low grade heat energy electricity-generating method and device - Google Patents

A kind of low grade heat energy electricity-generating method and device Download PDF

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Publication number
CN105261808B
CN105261808B CN201510694726.4A CN201510694726A CN105261808B CN 105261808 B CN105261808 B CN 105261808B CN 201510694726 A CN201510694726 A CN 201510694726A CN 105261808 B CN105261808 B CN 105261808B
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solution
energy
low grade
grade heat
heat energy
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CN201510694726.4A
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CN105261808A (en
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徐士鸣
吴曦
吴德兵
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大连理工大学
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M14/00Electrochemical current or voltage generators not provided for in groups H01M6/00 - H01M12/00; Manufacture thereof

Abstract

The present invention relates to a kind of new low grade heat energy electricity-generating method, the electricity-generating method includes two processes:Low grade heat energy is converted to the chemical potential energy of solution by generator;The chemical potential energy of solution is converted into electric energy by reverse electrodialysis (RED) battery pile again to export;Solution chemistry potential energy converting and energy is after electric energy, strong solution concentration declines, the rise of weak solution concentration, and both flow out RED battery piles and are mixed into intermediate concentration solution, intermediate concentration solution is heated separation by low grade heat energy again after being heated up through solution heat exchanger into generator, completes a power generation cycle.The present invention advantage be:1) low grade heat energy can obtain abundant, continuous, cascade utilization;2) electricity generation system is simple, reliable, and capacity configuration flexibly, and possesses energy-storage function;3) negative pressure Operating In Persistent Current Mode is circulated, safe, reliable, environmentally friendly, noiseless.

Description

A kind of low grade heat energy electricity-generating method and device

Technical field

The invention belongs to low grade heat energy technical field of power generation, it is related to a kind of low grade heat energy electricity-generating method and device.

Background technology

Existing low grade heat energy generation technology mainly using the Rankine cycle generation technology of heat-work(conversion, that is, utilizes heat energy By the liquid working media gasification under elevated pressures, relatively-high temperature, the steam driving centrifugation turbine or screw expansion of high pressure Machine exports shaft work and drives electrical power generators;Steam its temperature and pressure drop after being expanded in centrifugation turbine or screw expander It is low, liquid is then condensed into condenser, last profit to pump up and be pumped into boiler or steaming again by the working media of liquid Gasified again in hair device.Generated electricity for the of a relatively high low-grade heat of temperature, the working media used in circulation is right for water Generated electricity in the relatively low low-grade heat of temperature, the working media used in circulation is more lower boiling organic matter.

For using traditional Rankine cycle using water as working medium, because the critical point of water vapour is high, cause low-grade heat The efficiency reduction of electric energy, and turbine or screw expander size and weight increase can be converted into.For being substituted with organic working medium The organic rankie cycle (ORC) that water is constituted, its intrinsic defect includes:1) organic working medium used by is with higher HFC (HFCs) material of GWP (Global Warming Potential) value, or inflammable and explosive hydrogen hydrocarbon (HCs) thing Matter;2) generated electricity for the low grade heat energy of different temperatures grade, it is necessary to from the organic working medium without species, working medium versatility Difference;3) generated electricity for the larger low grade heat energy of temperature and thermal change scope, organic working medium turbine not only develop difficulty it is high and The versatility of turbine is poor, it is difficult to form seriation;4) because organic working medium gasification latent heat is small, pump work consumption is big, works as low-grade heat When energy temperature is less than 70 DEG C, ORC output net work is reduced and drastically reduced with low grade heat energy temperature;5) including ORC Heat-work(conversion cycle is in itself without energy-storage function, it is difficult to adapt to unstable low-grade heat source power generation needs.

In order to overcome the inherent shortcoming present in the Rankine thermodynamic cycle based on heat-work(conversion, document (ammonium hydrogen carbonate-anti- To electrodialysis modular configuration research membrane science and technologies, 2013,33 (6):6-12) provide a kind of thermal drivers electrochemical generator (TDEG) circulate.The circulation is made up of distillation column and RED battery piles, and work is used as using the ammonium bicarbonate soln that heat endurance is poor Medium.Ammonium bicarbonate soln decomposed is made into CO by low grade heat energy heating in distillation column intracellular bicarbonate ammonium salt solution2And NH3Gas Body simultaneously flows out distillation column, CO2And NH3Side is reuptaked by solution for dilute (outlet) that gas is circulated in RED battery piles concentrated solution turns into Concentrated solution.There is concentration difference between concentrated solution and the weak solution for going out distillation column, the solution of two kinds of various concentrations respectively enters RED electricity Chi Dui dilute, concentrated solution room, in the presence of solution concentration difference, cation NH3 +Weak solution is entered by cation exchange membrane module Room, anion CO3 -Weak solution room is also entered by anion-exchange membrane, as a result make solution concentration in weak solution room raise and from Open RED battery piles to enter in distillation column, again by low grade heat energy heat resolve;Solution concentration difference can be converted into by RED battery piles Electric energy.The shortcoming of the circulation is:1) ammonium bicarbonate soln need certain decomposition temperature (>60 DEG C), temperature is less than this value Low grade heat energy can not be utilized;2) when low grade heat energy temperature is higher, it is impossible to reuse separation process using multiple-effect mode The heat energy of generation, causes energy conversion efficiency low;3) circulation is difficult to store energy in itself.In addition, the recycle stream shown in document The absorption heat that journey lacks produced by solution to be absorbed to a cooler gas is discharged.Single heat source system is can not be by low-grade heat High-grade electric energy can be converted into.

Document (Robert L.McGinnis, Jeffrey R.McCutcheon, Menachem Elimelech.Journal of Membrane Science,2007,(305):13-19) another low grade heat energy is given The concentration difference power generation cycle of driving.The circulation is made up of distillation column, pressure exchanger and osmotic pressure heat engine, and working media is still used Ammonium bicarbonate soln.It is identical with foregoing method, distillation column is first passed through by ammonium bicarbonate soln decomposed, makes low grade heat energy It is converted into solution concentration difference (chemical potential) energy.Then solution concentration difference can be converted into the pressure energy (gravitational potential of solution using permeable membrane Can) come drive hydraulic turbine work done drive electrical power generators.Absorb through the mixed intermediate concentration solution part of permeable membrane The CO isolated from distillation column2And NH3Gas formation concentrated solution, another part is decomposed again in distillation column.The circulation is same There is drawbacks described above in sample, and hydraulic turbine cost of manufacture is higher, for temperature and thermal change very big low grade heat energy, It is hardly formed series.Causing the possibility of practical application reduces.

The content of the invention

In view of the shortcomings of the prior art, the technical problem to be solved in the present invention is to propose a kind of low grade heat energy generating side Method, is converted to low grade heat energy by generator the chemical potential energy of solution, then will be molten by reverse electrodialysis (RED) battery pile The chemical potential energy of liquid is converted into available electric energy output, and low-grade heat source temperature is higher, and system generating efficiency is higher;It is low-grade Heat from heat source is bigger, and system generated energy is bigger.

The technical solution of the present invention is to provide a kind of low grade heat energy electricity-generating method and device, wherein low grade heat energy Electricity-generating method includes following two processes:

The first step:Low grade heat energy is converted into the process of solution chemistry potential energy.(more than 50 DEG C) of low grade heat energy adds first Part low boiling component in working solution in heater, working solution is evaporated and is separated from solution, separation A small amount of working solution is carried in the low boiling component steam gone out secretly to increase the electrical conductivity of low boiling component condensate liquid (weak solution); The low boiling component steam isolated enters in condenser the medium that is cooled and is condensed into weak solution;It is low that working solution isolates part Concentration rise turns into concentrated solution after boiling point component;Concentration difference is produced between concentrated solution and weak solution and has chemical potential energy poor.

Second step:Chemical potential energy between dilute, concentrated solution is converted into the process of electric energy using RED battery piles.Concentrated solution stream Go out generator, cooling processing is carried out in solution heat exchanger, the operating temperature that concentrated solution temperature reaches membrane module and allowed (is less than 60 DEG C) after, flow out solution heat exchanger;Concentrated solution pump pressurizes to it and is incorporated into each concentrated solution room of RED battery piles;Condenser Interior weak solution is pressurizeed by weak solution pump and is incorporated into each weak solution room of RED battery piles;In RED battery piles concentrated solution room and Weak solution room is alternately arranged, and the anions and canons in concentrated solution are migrated to each weak solution room respectively by anions and canons exchange membrane Interior, because the migration of anions and canons is formed in ion stream and then generation, electric current can be by external circuit between the membrane module of RED battery piles Output.

When RED battery piles constitute closed-loop path with load, the electrode solution in anode chamber and cathode chamber is followed by electrode solution Ring pump is circulated between two pole rooms, keeps electroneutral;Electrode solution with cation reaches cloudy by electrode solution circulating pump Pole room, occurs reduction reaction acquisition electronics in negative electrode and becomes metallic atom, metallic atom is circulated together with electrode solution through electrode solution Pump reaches anode chamber, and in anode oxidation reaction occurs for metallic atom, loses electronics as cation, electronics is through external circuit by anode Flow to negative electrode;External circuit produces DC current, RED battery pile direct output of DC current because of the displacement of electronics;Single RED electricity Chi Dui output voltage and electric current is limited by RED battery pile structures, can use multiple RED battery piles with series, parallel or string Parallel way meets requirement of the electric power output to voltage and current, and dilute, dense, intermediate concentration solution stream stock need to be according to battery pile group Conjunction mode makes corresponding change;The DC current of RED battery piles output can also exchange electric forming output through current inverter.

Between dilute, concentrated solution under the driving of difference in chemical potential, in RED battery piles in concentrated solution room solute anions and canons Weak solution room is moved into by anion exchange membrane module and cation exchange membrane module respectively;Concentrated solution in concentrated solution room is because molten Moving out for matter ion and concentration decline, and because of moving into for solute ions, concentration is raised the weak solution in weak solution room, and both flow out The solution of intermediate concentration is mixed into after RED battery piles, generator is entered after being heated up through solution heat exchanger by low grade heat energy Heat, separate, so as to complete a complete working cycles again.Circulatory system generated energy and generating efficiency are by low-grade heat source Temperature and heat influence, low-grade heat source temperature are higher, and system generating efficiency is higher;Low-grade heat source heat is bigger, system hair Electricity is bigger.

With the device of the low grade heat energy electricity-generating method, including generator, solution heat exchanger, concentrated solution pump, RED electricity Chi Dui, electrode solution circulating pump, condenser, weak solution pump, inverter and auxiliary device.

The generator is divided into single-action by heat source temperature difference or multiple-effect occurs, and the number of generator is equal with effect number, in Between strength solution multiple-effect generator is entered in the mode such as in parallel, series connection or connection in series-parallel mixing;The solution heat exchanger number by The mode that intermediate concentration solution enters each generator determines (such as occur for the effect of following current series connection two, intermediate concentration solution is through single An effect generator is introduced into after heat exchanger heat exchange, two effect generators are then then flowed into, the concentrated solution that generator is imitated in outflow two is being changed Exchanged heat in hot device with intermediate concentration solution;And occur for the effect of parallel connection two, intermediate concentration solution is passed in and out in parallel Each effect generator, need to set two solution heat exchangers, and the concentrated solution that an effect generator comes out is imitated in generator with entering one Between strength solution exchanged heat, two concentrated solutions that come out of effect generators are changed with entering the intermediate concentration solution of two effect generators Heat);According to heat source temperature grade characteristic and to middle strength solution mode of heating, low grade heat energy Land use systems can also be divided into Single-stage is utilized or Multi-class propagation.

The RED battery piles include end casing, negative electrode, anode, cathode chamber, anode chamber, multiple anions and canons exchange membrane groups Part, multiple dilute, concentrated solution rooms;Anode chamber and cathode chamber are located at the two ends of RED battery piles, by cation exchange membrane module and end cap Plate is separated;Anions and canons exchange membrane module and are alternately arranged to form concentrated solution room and weak solution room, a cation-exchange membrane Component and an anion exchange membrane module constitute a film group pair;Cation exchange membrane module is connected with electrode chamber, than the moon from Proton exchange component is more one;Concentration (chemical potential) difference produced between concentrated solution and weak solution produces membrane voltage between film group pair Difference;A membrane voltage is produced between each film group pair, the film group of RED battery piles series connection is more to quantity, its voltage exported Higher, power is bigger.

The auxiliary equipment includes concentrated solution storage tank, concentrated solution recirculation pump and weak solution storage tank;It can increase in a device If concentrated solution storage tank and weak solution storage tank, system has energy storage and releases energy function, makes the electric power output of system stable, not with low product Position heat energy parameter (temperature and heat) change and change.

The beneficial effects of the invention are as follows:1) low grade heat energy can obtain abundant, continuous, cascade utilization;2) working cycles Simply, reliability, operating pressure are low, do not need complex structure, reliability poor centrifugation turbine or screw expander and generator Deng rotating machinery, simplify low grade heat energy generating flow and equipment, reduce low grade heat energy cost of electricity-generating;3) generating capacity Flexible configuration, possesses energy-storage function, system can adapt to all kinds of low temperature heat energies, and can fully recycle its hot grade, have High energy conversion efficiency;4) working cycles are closed circulation, and working media is electrolyte solution, no other harmful substances matter life Into to environment without any pollution;5) system composition is flexible, and manufacture is easy, and moving component is few, long working life, and operation is quiet.

Brief description of the drawings

Fig. 1:The working cycles flow chart of low grade heat energy electricity-generating method occurs for a kind of single-action for not having energy-storage function.

Fig. 2:RED battery pile structure schematic diagrames.

Fig. 3:The working cycles flow chart of low grade heat energy electricity-generating method occurs for a kind of five effects for not having energy-storage function.

Fig. 4:The working cycles flow chart of low grade heat energy electricity-generating method occurs for a kind of single-action for possessing energy-storage function.

In figure:1 generator, 2 solution heat exchangers, 3 concentrated solution pumps, 4RED battery piles, 5 end casings, 6 negative electrodes, 7a negative electrodes Room, 7b anode chambers, 8 cation exchange membrane modules, 9 concentrated solution rooms, 10 anion exchange membrane modules, 11 weak solution rooms, 12 anodes, 13 electrode solution circulating pumps, 14 condensers, 14a cooling stream stocks, 14b cooling stream stocks, 15 weak solution pumps, 16 inverters, 17 concentrated solutions Storage tank, 18 concentrated solution recirculation pumps, 19 weak solution storage tanks, 1a low grade heat energies stream stock, 1b low grade heat energies stream stock, 1A first is imitated Generator, 1A1 water vapours, the effect generators of 1B second, 1B1 water vapours, 1C triple effect generators, 1C1 water vapours, 1D quadruple effects hair Raw device, 1D1 water vapours, the effect generators of 1E the 5th, 1E1 low pressure water vapors, 1E2 condensate liquids.

Arrow direction is stream stock flow direction in accompanying drawing, and solid line is concentrated solution stream stock, and dotted line is steam or weak solution Stock is flowed, dotted line is intermediate concentration solution stream stock, and two-dot chain line is electrode solution stream stock.

Embodiment

With reference to the specific implementation process of technical scheme and accompanying drawing, in detail the narration present invention.

Accompanying drawing 1 is a kind of working cycles flow of the single-action low grade heat energy electricity-generating method without energy-storage function, wherein attached Fig. 2 is the structural representation of RED battery piles 4 in working cycles;Its course of work is:Low-temperature water heating, low pressure water vapor or low temperature The low grade heat energy such as hot gas stream stock 1a, flows through generator 1, heating work solution (such as NaCl aqueous solution) in generator 1, Low grade heat energy stream stock 1a, which flows through generator 1 and released, flows out generator 1 after heat;The NaCl aqueous solution obtains heat in generator 1 After amount, low boiling component (water) is partially vaporized under low pressure, separated as a vapor from the NaCl aqueous solution;Point Carry a small amount of NaCl aqueous solution in the water vapour separated out secretly;The water vapour for carrying a small amount of NaCl aqueous solution secretly enters cold in condenser 14 But medium 14a, 14b is condensed into weak solution, condensate can increase the conductance of condensation water (weak solution) containing a small amount of NaCl components Rate;Isolating the rise of the NaCl concentration of aqueous solution after the water of part turns into concentrated solution, and it forms concentration difference between weak solution and made It has chemical potential energy poor;The concentrated solution of outflow generator 1 is pressurizeed after exchanging heat, cool through solution heat exchanger 2 by concentrated solution pump 3 And each concentrated solution room 9 of RED battery piles 4 is introduced into, weak solution introduces each of RED battery piles after being pressurizeed by weak solution pump 13 Weak solution room 11;Between dilute, concentrated solution under the driving of concentration (chemical potential energy) difference, the yin, yang of solute in concentrated solution room 9 (Cl-、Na+) ion moves into weak solution room 11 by anion exchange membrane module 10 and cation exchange membrane module 9 respectively, in RED Ion stream is produced in battery pile 4, and makes it have interior electric current;So, in RED battery piles 4, the chemistry between dilute, concentrated solution Potential energy difference is converted into direct current energy;Negative electrode 6 and anode 12 are respectively equipped with the electrode chamber at the two ends of RED battery piles 4, in anode Locate Na atoms in electrode solution generation oxidation reaction, electrode solution and lose electronics as Na+, electronics flows to negative electrode 6, electrode through external circuit Liquid obtains electronics on negative electrode 10 and occurs reduction reaction, Na+Ion is reduced into Na atoms;Electrode solution passes through electrode solution circulating pump 13 circulate between two electrode chambers, keep its electroneutral;External circuit is directly defeated because the displacement of electronics produces DC current Go out, or exported through current inverter 16 with exchanging electric forming;Membrane module is more to quantity in RED battery piles 4, and it exports total voltage Higher, power output is also bigger;Dilute, concentrated solution is after RED battery piles 4, and because of moving out for solute ions, concentration declines concentrated solution, Because of moving into for solute ions, concentration is raised weak solution, and both, which flow out, is mixed into intermediate concentration solution after RED battery piles 4, and passes through Solution heat exchanger 2 enters generator 1 after heating up, and separation is heated again by low-grade heat source, so as to complete a complete work Circulate.

Accompanying drawing 3 is that the working cycles flow chart of low grade heat energy electricity-generating method occurs for a kind of five effects for not having energy-storage function, Its basic procedure explanation is identical with accompanying drawing 1, and difference is that the generator 1 in this flow is the effect series connection thermal release of following current five; In order to better profit from low-grade heat source thermograde, according to low-grade heat source temperature and the working solution property used, Generator 1 can from single-action to ten effect more than carry out thermal release (effect number refer to the number of times that heat energy is utilized, merely with once for list Effect, is triple effect using three times, by that analogy using being two effects twice), multiple-effect generator 1 can reduce the heat energy of solution separation Consumption.Its course of work is:Low grade heat energy stream stock 1a with higher temperature flow through generator 1 the first effect (1A) heat into Enter the intermediate concentration solution (e.g., the NaCl aqueous solution) in generator;The NaCl aqueous solution obtains heat in the effect of generator 1 first 1A Afterwards, low boiling component (water) therein is vaporized under the first effect 1A pressure and separated from solution;Due to heat source temperature It is higher, make it is also higher from the first water vapour 1A1 temperature for isolating of effect generator 1A, can as the second effect generator 1B's plus Thermal source, heating comes out solution from the first effect generator 1A, it is again separate out water vapour 1B1, with going out the second effect generator 1B Water vapor condensate 1B2 is in the lump as triple effect generator 1C thermal source;By that analogy until the 5th effect generator 1E;It is final from The low pressure water vapor 1E1 and condensate liquid 1E2 of 5th effect generator 1E outflows enter the cooled stream stock 14a, 14b of condenser 14 in the lump It is condensed into weak solution;Weak solution has big concentration difference with leaving the effect of generator 1 the 5th 1E concentrated solution, can be by RED batteries Heap converts thereof into electric energy;Because heat energy is repeatedly utilized in multiple-effect generating process, the utilization of low grade heat energy can be improved Efficiency, the low grade heat energy of same heat can produce more electric energy.

Accompanying drawing 4 is that the working cycles flow chart of low grade heat energy electricity-generating method occurs for a kind of single-action for possessing energy-storage function, Its basic procedure explanation is identical with accompanying drawing 1, and difference is to be additionally arranged concentrated solution recirculation pump 18, the and of concentrated solution storage tank 17 in flow Weak solution storage tank 19.In the case of low grade heat energy parameter (temperature, heat) is unstable, concentrated solution storage tank 17 and weak solution storage tank 19 can store or release energy, while making RED battery piles 4 in workflow export electric energy in a stable manner.Its work is former Reason is:In closed cycle, when low grade heat energy parameter increases, flow in concentrated solution recirculation pump 18 and in generator 1 The weak solution flow inside isolated accordingly increases, and unnecessary weak solution is stored in solution reservoir 19;It is dilute molten due to what is isolated Liquid measure increase can raise the solution concentration in concentrated solution storage tank 17, increase the difference in chemical potential between dilute, concentrated solution, the change of solution Potential energy is learned to be stored.And when low grade heat energy parameter reduces, flow in concentrated solution recirculation pump 18 and in generator 1 point The weak solution flow separated out also accordingly reduces, and the weak solution flow for flowing through RED battery piles 4 is constant, can make weak solution storage tank 19 Interior weak solution amount reduces, because the working solution amount that whole closed system is filled is determined, so the solution in concentrated solution storage tank 17 Amount increase, concentration reduction.The solution chemistry potential energy being stored in dilute, concentrated solution is released.

Claims (6)

1. a kind of low grade heat energy electricity-generating method, it is characterised in that comprise the following steps:
The first step, low grade heat energy is converted into solution chemistry potential energy;Working solution in low grade heat energy heating generator (1), Part low boiling component is entered in condenser (14) by thermal evaporation outflow generator (1) in working solution, the medium that is cooled (14a, 14b) it is condensed into the weak solution with certain electrical conductivity;The working solution after the low boiling component of part is isolated for concentrated solution;It is dense Have chemical potential energy poor between solution and weak solution;
Chemical potential energy is converted into electric energy by second step, reverse electrodialysis RED battery piles (4);Concentrated solution outflow generator (1) is through molten After liquid heat exchanger (2) cools and concentrated solution pump (3) pressurizes, RED battery piles (4) each concentrated solution room (9) is introduced;Condenser (14) Interior weak solution introduces each weak solution room (11) of RED battery piles (4) after being pressurizeed through weak solution pump (15);Anion in concentrated solution Migrated with cation by the anion exchange membrane module (10) and cation exchange membrane module (8) in RED battery piles (4) to dilute In solution room (11), ion stream is formed;Cation exchange membrane module (8) and anion exchange membrane module (10) are alternately arranged to be formed Multiple concentrated solution rooms (9) and weak solution room (11), a cation exchange membrane module (8) and an anion exchange membrane module (10) membrane module pair is constituted;Ion stream is produced between membrane module pair in RED battery piles and forms interior electric current, interior electric current is by RED Battery pile (4) is exported by external circuit;RED battery piles (4) two ends are provided with cathode chamber (7a) and anode chamber (7b), and electrode solution is led to Electrode solution circulating pump (13) is crossed in two electrode circulating insides;Cation in electrode solution is arrived by electrode solution circulating pump (13) Electronics is obtained up to negative electrode (6), metallic atom reaches anode (12) through electrode solution circulating pump (13) together with electrode solution and loses electronics; Electronics produces direct current from anode (12) displacement to negative electrode (6) in external circuit, and is directly exported through RED battery piles (4), or It is converted into exchanging electricity output through current inverter (16);
Solution chemistry potential energy converting and energy is after electric energy, strong solution concentration declines in concentrated solution room (9), weak solution in weak solution room (11) Concentration is raised, and both flow out RED battery piles (4) and are mixed into intermediate concentration solution, and intermediate concentration solution is through solution heat exchanger (2) heated separation again by low grade heat energy into generator (1) after heating up, complete a power generation cycle.
2. a kind of low grade heat energy electricity-generating method according to claims 1, it is characterised in that:The low grade heat energy root Can single-stage or Multi-class propagation according to temperature grade;Working solution in the generator (1) can be divided into single-action or many by heat source temperature Effect occurs, and generator (1) number is equal with effect number;Intermediate concentration solution is entered with parallel, series connection or connection in series-parallel hybrid mode to be sent out Raw device (1), the mode that solution heat exchanger (2) number enters generator (1) by intermediate concentration solution is determined.
3. a kind of low grade heat energy electricity-generating method according to claims 1 or 2, it is characterised in that:Working solution is easy By the electrolyte solution of thermal release, the heated low boiling component isolated contains a small amount of electrolyte.
4. a kind of low grade heat energy electricity-generating method according to claims 1, it is characterised in that:Single RED battery piles (4) Output voltage and electric current limited by battery pile structure, increase hair by way of multiple RED battery piles (4) serial or parallel connections The output voltage and power of electric system, while dilute, concentrated solution and intermediate concentration stream stock are done by RED battery piles (4) series and parallel mode Go out respective change.
5. with the TRT of low grade heat energy electricity-generating method as claimed in claim 1, it is characterised in that:Including generator (1), solution heat exchanger (2), concentrated solution pump (3), RED battery piles (4), electrode solution circulating pump (13), condenser (14), dilute molten Liquid pump (15), inverter (16) and auxiliary device;The RED battery piles (4) include end casing (5), negative electrode (6), anode (12), Anode chamber (7a), cathode chamber (7b), multiple cation exchange membrane modules (8), multiple anion exchange membrane modules (10), Duo Genong Solution room (9) and multiple weak solution rooms (11);Cathode chamber (7a) and anode chamber (7b) are located at RED battery piles (4) two ends;Cation Exchange membrane module (8) with electrode chamber to be connected, than anion exchange membrane module (10) one more;Produced between each membrane module pair One membrane voltage, series connection membrane module is more to quantity, and RED battery pile output voltages are higher, and power is bigger.
6. the TRT according to claims 5, it is characterised in that:The auxiliary equipment of described TRT includes dense Solution reservoir (17), concentrated solution recirculation pump (18) and weak solution storage tank (19), set up in a device concentrated solution storage tank (17) and Weak solution storage tank (19), system has energy storage and releases energy function.
CN201510694726.4A 2015-10-21 2015-10-21 A kind of low grade heat energy electricity-generating method and device CN105261808B (en)

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