CN103641068B - The change irradiation regulator control system of middle low-temperature solar Chemical complementation generating and method - Google Patents
The change irradiation regulator control system of middle low-temperature solar Chemical complementation generating and method Download PDFInfo
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- CN103641068B CN103641068B CN201310656107.7A CN201310656107A CN103641068B CN 103641068 B CN103641068 B CN 103641068B CN 201310656107 A CN201310656107 A CN 201310656107A CN 103641068 B CN103641068 B CN 103641068B
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Abstract
The invention discloses a kind of change irradiation regulator control system and method for middle low-temperature solar Chemical complementation generating, this system comprises methanol tank, water tank, control valve group, mixing tank, hydro-pump, preheater, interchanger, temperature sensor, integral solar energy absorption reactor thermally, gas-liquid separator, oil engine and liquid recovery device.The present invention is by the active control of different solar heat chemical reaction, make system can produce sun power fuel continuously when off-design irradiation intensity, by the combination of Driven by Solar Energy methanol decomposition and methanol recapitalization flow process, complete the collaborative of solar irradiation intensity temporal characteristics and different fossil oil conversion reaction, thus reach the active control becoming irradiation, varying duty complementary power generation system.Change irradiation regulator control system and the annual sun power fuel conversion of method of middle low-temperature solar Chemical complementation generating disclosed by the invention are high, and the clean generating efficiency of average annual sun power is high, good economy performance.
Description
Technical field
The present invention relates to sun power and fossil energy complemental power-generation technical field, particularly relate to a kind of change irradiation regulator control system and method for middle low-temperature solar Chemical complementation generating.
Background technology
Solar energy resources enriches, and the solar radiation rate that the earth intercepts is 10000 times of whole world energy speed.But due to features such as the intrinsic intermittence of sun power and unstable, the utilization of sun power is made to there are some difficulties.In recent years, solar heat chemical utilization mode is subject to the extensive concern of scholar.Solar heat chemistry refers to utilize optically focused solar thermal energy to drive thermo-negative reaction, and chemical energy solar thermal energy being converted into sun power fuel stores.Solar heat chemistry effectively overcomes the shortcoming that sun power is discontinuous and energy density is low.
Concentrate on high-temperature hot chemical field to the thermochemical research of sun power at present, the performance mainly for design solar irradiation intensity lower device or system is studied.Through the literature search to prior art, application number is the device that the utility model patent of 200320127837.X describes the hydrogen manufacturing of a kind of sun power thermo-chemical decomposition of water.This device utilizes Driven by Solar Energy ZnO to decompose, and can improve Solar use efficiency 1 ~ 5%.Application number be 201310022593.7 patent of invention describe a kind of cavity type solar high-temperature hot chemical reactor, this reactor has been coupled heat conduction heat exchange, convective heat exchange, radiation heat transfer and chemical kinetics, for solar heat chemical reaction process provides pyroreaction device.Application number be 201210256968.1 patent of invention describe a kind of solar energy high temperature thermochemistry coupling phase transition reactor.This reactor can reduce the thermograde of reaction chamber, and its thermochemical study efficiency can be higher by 8% ~ 21% than traditional solar heat chemical reactor.Above patent pays close attention to performance and the design of reactor under design solar irradiation intensity mostly, does not relate to the performance how improving solar heat chemical reactor when becoming irradiation.
" in sun power the thermal chemical reaction hydrogen generating system of low-temperature hot source drive and method " patent of invention is proposed before the research team of the application, disclose the thermal chemical reaction hydrogen generating system of low-temperature hot source drive in a kind of sun power, utilize parabolic trough type solar energy collector and the pipe type solar energy absorption reactor thermally of uniaxiality tracking, assemble 150 DEG C of heats to 300 DEG C of temperature ranges, drive methanol steam reforming hydrogen making.This system convert solar energy into the temperature of heat energy and reformation hydrogen production react required for Temperature Matching, achieve the Appropriate application of middle low-grade solar thermal energy.Simultaneously by solar collector and reactor apparatus integration, simplify system flow, reduce heat lost by radiation.Find in actual motion, when solar irradiation Strength Changes, it is low that system that this application is carried also exists fuel conversion, the problem of annual thermal performance difference.
Summary of the invention
(1) technical problem that will solve
In view of this, main purpose of the present invention is the change irradiation regulator control system and the method that propose a kind of middle low-temperature solar Chemical complementation generating, poor with methyl alcohol thermochemistry complementary power generation system system thermal performance when becoming irradiation, varying duty to solve low-temperature solar energy at present, the problem that generating efficiency is low only every year.
(2) technical scheme
For achieving the above object, the invention provides a kind of change irradiation regulator control system of middle low-temperature solar Chemical complementation generating, this system comprises methanol tank 1, water tank 2, first by-pass valve control 3, second by-pass valve control 4, 3rd by-pass valve control 5, mixing tank 6, hydro-pump 7, preheater 8, first temperature sensor 9, interchanger 10, second temperature sensor 11, integral solar energy absorption reactor thermally 12, three-temperature sensor 13, gas-liquid separator 14, oil engine 15, liquid recovery device 16, 4th by-pass valve control 17 and the 5th by-pass valve control 18, wherein: methanol tank 1, 3rd by-pass valve control 5, hydro-pump 7, preheater 8, first temperature sensor 9, interchanger 10, second temperature sensor 11 is connected successively with integral solar energy absorption reactor thermally 12, water tank 2, first by-pass valve control 3, mixing tank 6, hydro-pump 7, preheater 8, first temperature sensor 9, interchanger 10, second temperature sensor 11, integral solar energy absorption reactor thermally 12 connects successively, integral solar energy absorption reactor thermally 12 is connected to gas-liquid separator 14 by preheater 8 and three-temperature sensor 13 more successively, gas-liquid separator 14 is connected to hydro-pump 7 by liquid recovery device 16 and the 4th by-pass valve control 17 successively, gas-liquid separator 14 is connected to mixing tank 6 by liquid recovery device 16 and the 5th by-pass valve control 18 successively, be connected by the second by-pass valve control 4 between methanol tank 1 with mixing tank 6, gas-liquid separator 14 is also connected to oil engine 15.
In such scheme, when direct projection solar irradiation intensity (DNI) is higher than default irradiation value, this system adopts the flow process driving methanol decomposition reaction, now open the 3rd by-pass valve control 5 all to keep closing with the 4th by-pass valve control 17, first by-pass valve control 3, second by-pass valve control 4 and the 5th by-pass valve control 18; The liquid methanol of 25 DEG C enters hydro-pump 7 from methanol tank 1, and in preheater 8, the heat of absorption reaction product heats up, and absorbs heat in interchanger 10, makes the inlet temperature of integrated absorption reactor thermally 12 maintain 150 DEG C; There is methanol decomposition reaction while methanol steam absorbs solar thermal energy in integral solar energy absorption reactor thermally 12, produce H
2with the synthetic gas fuel of CO; The temperature out of integral solar energy absorption reactor thermally 12 is between 150 DEG C ~ 300 DEG C; Reaction product is condensed to 26 DEG C after preheater 8, enters gas-liquid separator 14 and is separated; Unreacted liquid methanol enters liquid recovery device 16, enters hydro-pump 7 prepare recycle by the 4th by-pass valve control 17; Synthetic gas fuel enters oil engine 15 combustion power generation.
In such scheme, when DNI can not meet lower than default irradiation value the needs driving methanol decomposition reaction, this system adopts the flow process driving methanol steam reforming, now open the first by-pass valve control 3, second by-pass valve control 4 and the 5th by-pass valve control 18, close the 3rd by-pass valve control 5 and the 4th by-pass valve control 17; The ratio of the de-salted water of the liquid methanol of 25 DEG C and 25 DEG C 1:1.2 in molar ratio enters mixing tank 6 respectively from methanol tank 1 and water tank 2, preheater 8 is pumped into by hydro-pump 7 after abundant mixing, the heat of absorption reaction product heats up, and heat is absorbed in interchanger 10, make the temperature of methyl alcohol and water mixture maintain 150 DEG C and enter integral solar energy absorption reactor thermally 12; There is methanol steam reforming while absorbing solar thermal energy, produce H
2and CO
2; Reaction product condensation after preheater 8 release of heat, be separated in gas-liquid separator 14, unreacted liquid enters liquid recovery device 16, enters mixing tank 6 recycle by the 5th by-pass valve control 18; H
2and CO
2mixed gas enter oil engine 15 combustion power generation.
In such scheme, the default irradiation value of described direct projection solar irradiation intensity (DNI) is 390W/m
2, when DNI is higher than 390W/m
2time this system adopt drive methanol decomposition reaction flow process, when DNI is lower than 390W/m
2time this system adopt and drive the flow process of methanol steam reforming.
For achieving the above object, present invention also offers a kind of change irradiation regulate and control method of middle low-temperature solar Chemical complementation generating, the method is by reacting higher than adopting methanol decomposition during default irradiation value at DNI, adopt methanol steam reforming at DNI lower than during default irradiation value, complete working in coordination with of different DNI and different thermo-negative reaction.
In such scheme, when DNI can well drive methanol decomposition to react higher than default irradiation value, methyl alcohol is through hydro-pump, interchanger, the first temperature sensor, preheater, the second temperature sensor, integral solar energy absorption reactor thermally is entered with steady temperature, in integral solar energy absorption reactor thermally, methanol decomposition reaction is there is while low-grade solar thermal energy, CH during methanol fuel absorbs
3oH=CO+2H
2△ H
298K=90kJ/mol, middle low-grade solar thermal energy is converted into H
2with the chemical energy of CO synthetic gas fuel, synthetic gas fuel burns work done in oil engine.
In such scheme, when DNI is not enough to drive methanol decomposition reaction lower than default irradiation value, by changing system flow, methyl alcohol and de-salted water enter mixing tank by a certain percentage, pressurizeed, through preheater, the first temperature sensor, interchanger, the second temperature sensor by hydro-pump after abundant mixing, enter integral solar energy absorption reactor thermally with steady temperature, absorb solar thermal energy in integral solar energy absorption reactor thermally while, methanol steam reforming occurs, CH
3oH+H
2o=CO
2+ 3H
2△ H
298K=50kJ/mol, reacted mixture is by gas-liquid separator separates, and the liquid form mixt of methyl alcohol and water is back to liquid recovery device, and hydrogen enriched fuel gas enters combustion in IC engine generating.
In such scheme, the default irradiation value of described DNI is 390W/m
2, when DNI is higher than 390W/m
2shi Caiyong drives the flow process of methanol decomposition reaction, when DNI is lower than 390W/m
2shi Caiyong drives the flow process of methanol steam reforming.
(3) beneficial effect
As can be seen from technique scheme, the present invention has following beneficial effect:
1, utilize the present invention, relatively high according to methanol decomposition temperature of reaction, the feature that methanol steam reforming temperature is relatively low, at DNI higher than 390W/m
2when being applicable to driving methanol decomposition reaction, system adopts methanol decomposition reaction process, when DNI is lower than 390W/m
2time, increase mixing tank and control valve, change the flow process of Driven by Solar Energy methanol decomposition reactive system, and be regulated to Driven by Solar Energy methanol steam reforming flow process.By the active control of different solar heat chemical reaction, make system can produce sun power fuel continuously when off-design irradiation intensity.By the combination of Driven by Solar Energy methanol decomposition and methanol recapitalization flow process, complete the collaborative of solar irradiation intensity temporal characteristics and different fossil oil conversion reaction, thus reach the active control becoming irradiation, varying duty complementary power generation system.The annual sun power fuel conversion of system disclosed by the invention is high, and the clean generating efficiency of average annual sun power is high, good economy performance.
2, utilize the present invention, the maximum using of solar energy resources can be realized.At DNI lower than 390W/m
2when can not meet the needs driving methanol decomposition reaction, system adopts methanol steam reforming.Compared with the thermochemistry complementary power generation system driving methanol decomposition with middle low-temperature solar energy, under the condition that methanol inlet flow is constant, the present invention put forward system sun power fuel conversion can improve 9 percentage points.
3, utilize the present invention, the collaborative of different DNI and different thermo-negative reaction can be completed, thus improve system thermal performance.Compared with the thermochemistry complementary power generation system driving methanol decomposition with middle low-temperature solar energy, the clean generating efficiency of sun power can improve 6 percentage points, reaches 35%, close to design conditions value.
4, the present invention is utilized, at DNI lower than 390W/m
2time, system still can produce more hydrogen-rich fuel.Compared with the thermochemistry complementary power generation system driving methanol decomposition with middle low-temperature solar energy, when oil engine generated energy is identical, the mirror scene of present system is long-pending can reduce 25%, and cost of electricity-generating is expected to reduction by 8%.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the change irradiation regulator control system according to middle low-temperature solar Chemical complementation generating of the invention process, and be wherein the system flowchart before regulation and control in dashed rectangle, solid line is the system flowchart after regulation and control.
Wherein Reference numeral is: 1-methanol tank; 2-water tank; 3-first by-pass valve control; 4-second by-pass valve control; 5-the 3rd by-pass valve control; 6-mixing tank; 7-hydro-pump; 8-preheater; 9-first temperature sensor; 10-interchanger; 11-second temperature sensor; 12-integral solar energy absorption reactor thermally; 13-three-temperature sensor; 14-gas-liquid separator; 15-oil engine; 16-liquid recovery device; 17-the 4th by-pass valve control; 18-the 5th by-pass valve control.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
Based on average annual irradiation intensity principle of design, the invention provides a kind of change irradiation regulator control system and method for middle low-temperature solar Chemical complementation generating, when DNI can well drive methanol decomposition to react close to design load, methyl alcohol is through hydro-pump, interchanger, the first temperature sensor, preheater, the second temperature sensor, enter integral solar energy absorption reactor thermally with steady temperature, in absorption, methanol decomposition reaction occurs while low-grade solar thermal energy.Reacted mixture is by gas-liquid separator separates, and liquid methanol is back to liquid recovery device, and synthetic gas enters combustion in IC engine generating; Lower at DNI, when can not meet the needs of methanol decomposition reaction, system adopts methanol steam reforming.Methyl alcohol and de-salted water enter mixing tank by a certain percentage, are fully pressurizeed by hydro-pump, through preheater, the first temperature sensor, interchanger, the second temperature sensor, enter integral solar energy absorption reactor thermally with steady temperature after mixing.While low-grade solar thermal energy, methanol steam reforming occurs in absorption, reacted mixture is by gas-liquid separator separates, and the liquid form mixt of methyl alcohol and water is back to liquid recovery device, and hydrogen enriched fuel gas enters combustion in IC engine generating.
As shown in Figure 1, Fig. 1 is the schematic diagram according to the change irradiation regulator control system of low-temperature solar Chemical complementation generating in the embodiment of the present invention, and this system comprises methanol tank 1, water tank 2, first by-pass valve control 3, second by-pass valve control 4, the 3rd by-pass valve control 5, mixing tank 6, hydro-pump 7, preheater 8, first temperature sensor 9, interchanger 10, second temperature sensor 11, integral solar energy absorption reactor thermally 12, three-temperature sensor 13, gas-liquid separator 14, oil engine 15, liquid recovery device 16, the 4th by-pass valve control 17 and the 5th by-pass valve control 18.Wherein: methanol tank 1, 3rd by-pass valve control 5, hydro-pump 7, preheater 8, first temperature sensor 9, interchanger 10, second temperature sensor 11 is connected successively with integral solar energy absorption reactor thermally 12, water tank 2, first by-pass valve control 3, mixing tank 6, hydro-pump 7, preheater 8, first temperature sensor 9, interchanger 10, second temperature sensor 11, integral solar energy absorption reactor thermally 12 connects successively, integral solar energy absorption reactor thermally 12 is connected to gas-liquid separator 14 by preheater 8 and three-temperature sensor 13 more successively, gas-liquid separator 14 is connected to hydro-pump 7 by liquid recovery device 16 and the 4th by-pass valve control 17 successively, gas-liquid separator 14 is connected to mixing tank 6 by liquid recovery device 16 and the 5th by-pass valve control 18 successively, be connected by the second by-pass valve control 4 between methanol tank 1 with mixing tank 6, gas-liquid separator 14 is also connected to oil engine 15.
When direct projection solar irradiation intensity (DNI) is higher than default irradiation value, this system adopts the flow process driving methanol decomposition reaction, now open the 3rd by-pass valve control 5 all to keep closing with the 4th by-pass valve control 17, first by-pass valve control 3, second by-pass valve control 4 and the 5th by-pass valve control 18; The liquid methanol of 25 DEG C enters hydro-pump 7 from methanol tank 1, and in preheater 8, the heat of absorption reaction product heats up, and absorbs heat in interchanger 10, makes the inlet temperature of integrated absorption reactor thermally 12 maintain 150 DEG C; There is methanol decomposition reaction while methanol steam absorbs solar thermal energy in integral solar energy absorption reactor thermally 12, produce H
2with the synthetic gas fuel of CO; The temperature out of integral solar energy absorption reactor thermally 12 is between 150 DEG C ~ 300 DEG C; Reaction product is condensed to 26 DEG C after preheater 8, enters gas-liquid separator 14 and is separated; Unreacted liquid methanol enters liquid recovery device 16, enters hydro-pump 7 prepare recycle by the 4th by-pass valve control 17; Synthetic gas fuel enters oil engine 15 combustion power generation.
When DNI can not meet lower than default irradiation value the needs driving methanol decomposition reaction, this system adopts the flow process driving methanol steam reforming, now open the first by-pass valve control 3, second by-pass valve control 4 and the 5th by-pass valve control 18, close the 3rd by-pass valve control 5 and the 4th by-pass valve control 17; The ratio of the de-salted water of the liquid methanol of 25 DEG C and 25 DEG C 1:1.2 in molar ratio enters mixing tank 6 respectively from methanol tank 1 and water tank 2, preheater 8 is pumped into by hydro-pump 7 after abundant mixing, the heat of absorption reaction product heats up, and heat is absorbed in interchanger 10, make the temperature of methyl alcohol and water mixture maintain 150 DEG C and enter integral solar energy absorption reactor thermally 12; There is methanol steam reforming while absorbing solar thermal energy, produce H
2and CO
2; Reaction product condensation after preheater 8 release of heat, be separated in gas-liquid separator 14, unreacted liquid enters liquid recovery device 16, enters mixing tank 6 recycle by the 5th by-pass valve control 18; H
2and CO
2mixed gas enter oil engine 15 combustion power generation.
Wherein, in the present invention, the default irradiation value of DNI is 390W/m
2, when DNI is higher than 390W/m
2shi Caiyong drives the flow process of methanol decomposition reaction, when DNI is lower than 390W/m
2shi Caiyong drives the flow process of methanol steam reforming.
Based on the change irradiation regulator control system of low-temperature solar Chemical complementation generating in shown in Fig. 1, present invention also offers a kind of change irradiation regulate and control method of middle low-temperature solar Chemical complementation generating, the method is by reacting higher than adopting methanol decomposition during default irradiation value at DNI, adopt methanol steam reforming at DNI lower than during default irradiation value, complete working in coordination with of different DNI and different thermo-negative reaction.
Wherein, at DNI higher than 390W/m
2when can well drive methanol decomposition to react, methyl alcohol is through hydro-pump, interchanger, the first temperature sensor, preheater, the second temperature sensor, integral solar energy absorption reactor thermally is entered with steady temperature, in integral solar energy absorption reactor thermally, methanol decomposition reaction is there is while low-grade solar thermal energy, CH during methanol fuel absorbs
3oH=CO+2H
2△ H
298K=90kJ/mol, middle low-grade solar thermal energy is converted into H
2with the chemical energy of CO synthetic gas fuel, synthetic gas fuel burns work done in oil engine.
At DNI lower than 390W/m
2when being not enough to drive methanol decomposition reaction, by changing system flow, by increasing water tank 2, mixing tank 6, first control valve 3 and the 5th control valve 18 etc., changing the flow process of system, making, in integral solar energy absorption reactor thermally 12, methanol steam reforming occurs.Methyl alcohol and de-salted water enter mixing tank by a certain percentage, pressurizeed, through preheater, the first temperature sensor, interchanger, the second temperature sensor by hydro-pump after abundant mixing, integral solar energy absorption reactor thermally is entered with steady temperature, methanol steam reforming is there is, CH absorb solar thermal energy in integral solar energy absorption reactor thermally while
3oH+H
2o=CO
2+ 3H
2△ H
298K=50kJ/mo1, reacted mixture is by gas-liquid separator separates, and the liquid form mixt of methyl alcohol and water is back to liquid recovery device, and hydrogen enriched fuel gas enters combustion in IC engine generating.
Be arranged in the low-temperature solar Chemical Experimental Platform of Beijing for this research team, choose the average DNI390W/m of Beijing's whole year
2as design irradiation value.Namely at DNI higher than 390W/m
2time system adopt drive methanol decomposition reaction flow process, at DNI lower than 390W/m
2time system adopt and drive the flow process of methanol steam reforming.The rated output of oil engine is 10kW.Mirror scene is long-pending chooses 10m
2.Methanol inlet flow is 145mol/h.Envrionment temperature is 25 DEG C.
From 25 DEG C of liquid refrigerants of methanol tank 1, enter integral solar energy absorption reactor thermally 12 via hydro-pump 7, preheater 8, first temperature sensor 9, interchanger 10 and the second temperature sensor 11.Add heat by what control interchanger 10, ensure that the inlet temperature of integral solar energy absorption reactor thermally 12 maintains 150 DEG C.
When DNI is higher than 390W/m
2time, system adopts the flow process driving methanol decomposition reaction.Now open the 3rd by-pass valve control 5 all to keep closing with the 4th by-pass valve control 17, first by-pass valve control 3, second by-pass valve control 4 and the 5th by-pass valve control 18.The liquid methanol of 25 DEG C enters hydro-pump 7 from methanol tank 1, and in preheater 8, the heat of absorption reaction product heats up, and absorbs heat in interchanger 10, makes the inlet temperature of integrated absorption reactor thermally 12 maintain 150 DEG C.There is methanol decomposition reaction while methanol steam absorbs solar thermal energy in integral solar energy absorption reactor thermally 12, produce H
2with the synthetic gas fuel of CO.The temperature out of integral solar energy absorption reactor thermally 12 is between 150 DEG C ~ 300 DEG C.Reaction product is condensed to 26 DEG C after preheater 8, enters gas-liquid separator 14 and is separated.Unreacted liquid methanol enters liquid recovery device 16, enters hydro-pump 7 prepare recycle by the 4th by-pass valve control 17.Synthetic gas fuel enters oil engine 15 combustion power generation.
When DNI is lower than 390W/m
2when can not meet the needs driving methanol decomposition reaction, system adopts the flow process driving methanol steam reforming.Now open the first by-pass valve control 3, second by-pass valve control 4 and the 5th by-pass valve control 18, close the 3rd by-pass valve control 5 and the 4th by-pass valve control 17.The ratio of the de-salted water of the liquid methanol of 25 DEG C and 25 DEG C 1:1.2 in molar ratio enters mixing tank 6 respectively from methanol tank 1 and water tank 2, preheater 8 is pumped into by hydro-pump 7 after abundant mixing, the heat of absorption reaction product heats up, and heat is absorbed in interchanger 10, make the temperature of methyl alcohol and water mixture maintain 150 DEG C and enter integral solar energy absorption reactor thermally 12.There is methanol steam reforming while absorbing solar thermal energy, produce H
2and CO
2.Reaction product condensation after preheater 8 release of heat, be separated in gas-liquid separator 14, unreacted liquid enters liquid recovery device 16, enters mixing tank 6 recycle by the 5th by-pass valve control 18.H
2and CO
2mixed gas enter oil engine 15 combustion power generation.
System that the present invention carries can at DNI lower than 390W/m
2when can not meet the needs driving methanol decomposition reaction, continuing by driving methanol steam reforming flow process to produce sun power fuel, realizing the maximum using of solar energy resources.Under identical methanol inlet flow condition, the present invention carry low-temperature solar energy in the sun power fuel conversion ratio of system and drive the thermochemistry complementary power generation system of methanol decomposition high 9 percentage points.
The present invention puies forward the clean generating efficiency of system sun power can reach 35%, close to design conditions, drives the thermochemistry complementary power generation system about 6 percentage points of methanol decomposition higher than middle low-temperature solar energy.
The present invention to put forward system at the generated energy in September be 177kWh.Original middle low-temperature solar energy drives the generated energy in thermochemistry complementary power generation system September of methanol decomposition to be 132kWh.When identical generated energy, the present invention carry that mirror scene needed for system is long-pending can reduce 25%.Cost of electricity-generating is expected to reduction by 8%.
The change irradiation regulator control system of middle low-temperature solar Chemical complementation generating provided by the invention and method, at DNI greater than or equal to 390W/m
2when can well drive methanol decomposition to react, in integral solar energy absorption reactor thermally, while low-grade solar thermal energy, methanol decomposition reaction occurs during methanol fuel absorbs, middle low-grade solar thermal energy be converted into H
2with the chemical energy of CO synthetic gas fuel, synthetic gas fuel burns work done in oil engine.At DNI lower than 390W/m
2when being not enough to drive methanol decomposition reaction, by changing system flow, the mixture of first alcohol and water is made to enter integral solar energy absorption reactor thermally, methanol steam reforming is there is while absorbing solar thermal energy wherein, the hydrogen-rich fuel produced enters combustion in IC engine work done, and the middle low-temperature solar energy of hydrogen-rich fuel discharges with the form of high temperature heat.By at DNI greater than or equal to 390W/m
2shi Caiyong methanol decomposition reacts, at DNI lower than 390W/m
2shi Caiyong methanol steam reforming, completes the collaborative of different DNI and different thermo-negative reaction, and make the annual sun power fuel conversion of system high, the clean generating efficiency of average annual sun power is high, good economy performance.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the change irradiation regulator control system of low-temperature solar Chemical complementation generating in a kind, it is characterized in that, this system comprises methanol tank (1), water tank (2), first by-pass valve control (3), second by-pass valve control (4), 3rd by-pass valve control (5), mixing tank (6), hydro-pump (7), preheater (8), first temperature sensor (9), interchanger (10), second temperature sensor (11), integral solar energy absorption reactor thermally (12), three-temperature sensor (13), gas-liquid separator (14), oil engine (15), liquid recovery device (16), 4th by-pass valve control (17) and the 5th by-pass valve control (18), wherein:
Methanol tank (1), 3rd by-pass valve control (5), hydro-pump (7), preheater (8), first temperature sensor (9), interchanger (10), second temperature sensor (11) is connected successively with integral solar energy absorption reactor thermally (12), water tank (2), first by-pass valve control (3), mixing tank (6), hydro-pump (7), preheater (8), first temperature sensor (9), interchanger (10), second temperature sensor (11), integral solar energy absorption reactor thermally (12) connects successively, integral solar energy absorption reactor thermally (12) is connected to gas-liquid separator (14) by preheater (8) and three-temperature sensor (13) more successively, gas-liquid separator (14) is connected to hydro-pump (7) by liquid recovery device (16) and the 4th by-pass valve control (17) successively, gas-liquid separator (14) is connected to mixing tank (6) by liquid recovery device (16) and the 5th by-pass valve control (18) successively, be connected by the second by-pass valve control (4) between methanol tank (1) with mixing tank (6), gas-liquid separator (14) is also connected to oil engine (15).
2. the change irradiation regulator control system of middle low-temperature solar Chemical complementation generating according to claim 1, it is characterized in that, when direct projection solar irradiation intensity is higher than default irradiation value, this system adopts the flow process driving methanol decomposition reaction, now open the 3rd by-pass valve control (5) and the 4th by-pass valve control (17), the first by-pass valve control (3), the second by-pass valve control (4) and the 5th by-pass valve control (18) all keep closing; The liquid methanol of 25 DEG C enters hydro-pump (7) from methanol tank (1), in preheater (8), the heat of absorption reaction product heats up, and heat is absorbed in interchanger (10), make the inlet temperature of integrated absorption reactor thermally (12) maintain 150 DEG C; There is methanol decomposition reaction while methanol steam absorbs solar thermal energy in integral solar energy absorption reactor thermally (12), produce H
2with the synthetic gas fuel of CO; The temperature out of integral solar energy absorption reactor thermally (12) is between 150 DEG C ~ 300 DEG C; Reaction product is condensed to 26 DEG C after preheater (8), enters gas-liquid separator (14) and is separated; Unreacted liquid methanol enters liquid recovery device (16), enters hydro-pump (7) prepare recycle by the 4th by-pass valve control (17); Synthetic gas fuel enters oil engine (15) combustion power generation.
3. the change irradiation regulator control system of middle low-temperature solar Chemical complementation generating according to claim 1, it is characterized in that, when direct projection solar irradiation intensity can not meet lower than default irradiation value the needs driving methanol decomposition reaction, this system adopts the flow process driving methanol steam reforming, now open the first by-pass valve control (3), the second by-pass valve control (4) and the 5th by-pass valve control (18), close the 3rd by-pass valve control (5) and the 4th by-pass valve control (17); The ratio of the de-salted water of the liquid methanol of 25 DEG C and 25 DEG C 1:1.2 in molar ratio enters mixing tank (6) respectively from methanol tank (1) and water tank (2), preheater (8) is pumped into by hydro-pump (7) after abundant mixing, the heat of absorption reaction product heats up, and heat is absorbed in interchanger (10), make the temperature of methyl alcohol and water mixture maintain 150 DEG C and enter integral solar energy absorption reactor thermally (12); There is methanol steam reforming while absorbing solar thermal energy, produce H
2and CO
2; Reaction product condensation after preheater (8) release of heat, be separated in gas-liquid separator (14), unreacted liquid enters liquid recovery device (16), enters mixing tank (6) recycle by the 5th by-pass valve control (18); H
2and CO
2mixed gas enter oil engine (15) combustion power generation.
4. the change irradiation regulator control system of low-temperature solar Chemical complementation generating according to Claims 2 or 3, it is characterized in that, the default irradiation value of described direct projection solar irradiation intensity is 390W/m
2, when direct projection solar irradiation intensity is higher than 390W/m
2time this system adopt drive methanol decomposition reaction flow process, when direct projection solar irradiation intensity is lower than 390W/m
2time this system adopt and drive the flow process of methanol steam reforming.
5. the change irradiation regulate and control method of low-temperature solar Chemical complementation generating in a kind, be applied to the system according to any one of Claims 1-4, it is characterized in that, the method is by reacting higher than adopting methanol decomposition during default irradiation value in direct projection solar irradiation intensity, adopt methanol steam reforming in direct projection solar irradiation intensity lower than during default irradiation value, complete working in coordination with of different direct projection solar irradiation intensity and different thermo-negative reaction.
6. the change irradiation regulate and control method of middle low-temperature solar Chemical complementation generating according to claim 5, it is characterized in that, when direct projection solar irradiation intensity can well drive methanol decomposition to react higher than default irradiation value, methyl alcohol is through hydro-pump, interchanger, the first temperature sensor, preheater, the second temperature sensor, integral solar energy absorption reactor thermally is entered with steady temperature, in integral solar energy absorption reactor thermally, methanol decomposition reaction is there is while low-grade solar thermal energy, CH during methanol fuel absorbs
3oH=CO+2H
2; Δ H
298K=90kJ/mol, middle low-grade solar thermal energy is converted into H
2with the chemical energy of CO synthetic gas fuel, synthetic gas fuel burns work done in oil engine.
7. the change irradiation regulate and control method of middle low-temperature solar Chemical complementation generating according to claim 5, it is characterized in that, when direct projection solar irradiation intensity is not enough to drive methanol decomposition reaction lower than default irradiation value, by changing system flow, methyl alcohol and de-salted water enter mixing tank by a certain percentage, pressurizeed by hydro-pump after abundant mixing, through preheater, first temperature sensor, interchanger, second temperature sensor, integral solar energy absorption reactor thermally is entered with steady temperature, methanol steam reforming is there is absorb solar thermal energy in integral solar energy absorption reactor thermally while, CH
3oH+H
2o=CO
2+ 3H
2, Δ H
298K=50kJ/mol, reacted mixture is by gas-liquid separator separates, and the liquid form mixt of methyl alcohol and water is back to liquid recovery device, and hydrogen enriched fuel gas enters combustion in IC engine generating.
8. the change irradiation regulate and control method of middle low-temperature solar Chemical complementation generating according to claim 5, it is characterized in that, the default irradiation value of described direct projection solar irradiation intensity is 390W/m
2, when direct projection solar irradiation intensity is higher than 390W/m
2shi Caiyong drives the flow process of methanol decomposition reaction, when direct projection solar irradiation intensity is lower than 390W/m
2shi Caiyong drives the flow process of methanol steam reforming.
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| CN107434241A (en) * | 2017-06-06 | 2017-12-05 | 华电电力科学研究院 | One kind is based on the low NO of hydrogen-rich fuelXThe formula device and method of providing multiple forms of energy to complement each other of discharge |
| CN107634697A (en) * | 2017-10-20 | 2018-01-26 | 中国科学院工程热物理研究所 | A kind of " pyrolysis coupling " photovoltaic heat chemistry utilization system |
| CN112194100A (en) * | 2020-11-16 | 2021-01-08 | 王海东 | Conduction oil-free methanol water hydrogen production device for recycling carbon dioxide |
| CN114413502A (en) * | 2021-12-31 | 2022-04-29 | 集美大学 | Solar-driven methanol reforming and cracking reaction combined cooling heating and power system |
| CN115259083A (en) * | 2022-08-03 | 2022-11-01 | 西安热工研究院有限公司 | Solar efficient comprehensive utilization system and working method thereof |
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