CN104265450A - Methanol-based fuel high-pressure supplying device - Google Patents
Methanol-based fuel high-pressure supplying device Download PDFInfo
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- CN104265450A CN104265450A CN201410502556.0A CN201410502556A CN104265450A CN 104265450 A CN104265450 A CN 104265450A CN 201410502556 A CN201410502556 A CN 201410502556A CN 104265450 A CN104265450 A CN 104265450A
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Abstract
The invention discloses a methanol-based fuel high-pressure supplying device. The device comprises a methanol tank, a water tank and a dimethyl ether tank which respectively contain methanol, water and dimethyl ether; both the methanol tank and the water tank are connected with pre-pressurizing systems; the dimethyl ether tank is connected with a mixed measuring system; the pre-pressurizing systems and the mixed measuring system are connected, wherein the mixed measuring system is sequentially connected with a pressurizing system and an engine; in addition, the pressurizing system and the pre-pressurizing systems are all connected with air compressing devices. The methanol-based fuel high-pressure supplying device has the beneficial effects that methanol, dimethyl ether and water are mixed based on different ratios; in addition, the online control is realized; the demand on material supply at different pressures can be realized under a high pressure of 100 MPa; meanwhile, the flow rate can be adjusted within a certain range, and the utilization rate of the methanol-based fuel can be raised; the supplying system has a wide range of output pressure and can directly enter an internal combustion engine and other energy consumption devices without pressure reduction, and thus the energy consumption can be reduced; the self-cooling is realized, the operation can be individually performed, the pollution resource is avoided, and the long-time, safe, stable and reliable operation is reached.
Description
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Technical field
The present invention relates to a kind of methanol-based fuel high pressure feeder apparatus.
Background technique
Along with the develop rapidly of economy, the degree of environmental pollution increases the weight of day by day, make the protection that people more and more pay attention to for environment, for increasingly serious energy supply and environmental protection dual-pressure, both at home and abroad just at the clean energy resource that active research is new, methanol-based fuel, as the clean substitute fuel of internal-combustion engine (diesel engine), shows the development potentiality that it is huge; The combustion performance of research methanol-based fuel positive both at home and abroad at present and discharge, and achieve great achievement; But with the feeder apparatus that research is supporting, be still in the tradition stage.
Existing methanol-based fuel feed system Problems existing and defect:
1) function singleness, complicated operation, volume weight is large, and automaticity is low;
2) use electronic scale when each composition of methanol-based fuel mixes, ratio inaccuracy, cannot be adjustable online;
3) directly by motoring, speed of circulation is non-adjustable, and flow is immutable, can not flexibly for multiple pressure feed;
4) inlet pressure ranges is narrow, generally needs decompressor decompression work when inlet pressure is higher, or adopts relief valve, waste energy, and belong to blind and add, safety coefficient is not high;
5) need optional equipment electric power and cooling equipment to assist, cost is high, easily pollutes;
6) at present without 100MPa high pressure feeding system.
The main cause that above problem exists be the narrow limitation of motor-drive pump technology and the domestic input in this field relative very few with research, not high enough to the attention degree of multi-functional, automatic system, environmentally friendly machine.
For the problem in correlation technique, at present effective solution is not yet proposed.
Summary of the invention
The object of this invention is to provide a kind of methanol-based fuel high pressure feeder apparatus, the feed requirement of methyl alcohol under different proportion, different pressures grade can be met, particularly realize 100Mpa stable material-supplying, the multinomial technical requirements that compatible system controls simultaneously, security monitoring is reported to the police, effectively overcomes currently available technology above shortcomings.
The object of the invention is to be achieved through the following technical solutions:
A kind of methanol-based fuel high pressure feeder apparatus, comprise the methanol tank, water pot and the dimethyl ether tank that are respectively equipped with alcohol, water and dimethyl ether, described methanol tank and water pot are all connected with pre-pressurization system, described dimethyl ether tank is connected with mixing weighing system, described pre-pressurization system is connected with described mixing weighing system, described mixing weighing system is connected with motor with pressurization system successively, and described pressurization system and pre-pressurization system are all connected with compressed air plant.
Further, described mixing weighing system comprises mixer, described mixer is connected with the switch valve one, switch valve two and the switch valve three that are in parallel, and described switch valve one, switch valve two and switch valve three connect water pot, methanol tank and dimethyl ether tank respectively by flow dontroller one, flow dontroller two and flow dontroller three.
Further, described flow dontroller one, flow dontroller two and flow dontroller three include flowmeter, flow control valve and proportional/integral/derivative PID feedback means.
Further, described pressurization system comprises suction booster, and described suction booster is connected with through the mixed fuel of mixer, and described suction booster connecting engine, described motor connects fuel combination reflux by back pressure valve.
Further, safety valve and knock out drum is connected in parallel between described suction booster and motor.
Further, described suction booster is Pneumatic booster pump.
Further, auto-cool system is provided with between described motor and pressurization system.
Beneficial effect of the present invention is: add mass flow controller, achieves the methyl alcohol of different proportion, the mixing of dimethyl ether and water, and achieves and can regulate and control online; Realize the feed demand of different pressures under high pressure 100MPa, realize within the specific limits that flow is adjustable simultaneously, improve the availability of methanol-based fuel; Feeding system delivery pressure scope is wide, directly can enter the energy consumption equipment such as internal-combustion engine, without the need to decompression, reduces energy consumption; Realize from cooling, independent operating, stops pollution sources, realizes long-time safety and stability reliable operation.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of a kind of methanol-based fuel high pressure feeder apparatus according to the embodiment of the present invention;
Fig. 2 is the schematic flow sheet of the mixing weighing system of a kind of methanol-based fuel high pressure feeder apparatus according to the embodiment of the present invention;
Fig. 3 is the schematic flow sheet of the pressurization system of a kind of methanol-based fuel high pressure feeder apparatus according to the embodiment of the present invention;
Fig. 4 is the schematic diagram of the automatical control system of a kind of methanol-based fuel high pressure feeder apparatus according to the embodiment of the present invention.
In figure:
1, water pot; 2, methanol tank; 3, dimethyl ether tank; 4, pre-pressurization system; 5, mixing weighing system; 6, pressurization system; 7, motor; 8, mixer; 9, switch valve one; 10, switch valve two; 11, switch valve three; 12, flow dontroller one; 13, flow dontroller two; 14, flow dontroller three; 15, suction booster; 16, safety valve; 17, knock out drum; 18, back pressure valve; 19, PLC; 20, load module; 21, output module; 22, process control machine; 23, sensor unit.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technological scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain, belongs to the scope of protection of the invention.
According to embodiments of the invention, provide a kind of methanol-based fuel high pressure feeder apparatus.
As Figure 1-3, according to a kind of methanol-based fuel high pressure feeder apparatus of the embodiment of the present invention, comprise the methanol tank 2, water pot 1 and the dimethyl ether tank 3 that are respectively equipped with alcohol, water and dimethyl ether, described methanol tank 2 and water pot 1 are all connected with pre-pressurization system 4, described dimethyl ether tank 3 is connected with mixing weighing system 5, described pre-pressurization system 4 is connected with described mixing weighing system 5, described mixing weighing system 5 is connected with motor 7 with pressurization system 6 successively, further, described pressurization system 6 and pre-pressurization system 4 are all connected with compressed air plant.
Described pre-pressurization system 4 is made up of two membrane pump with pneumatic drives, and described membrane pump with pneumatic drive downstream is configured with accumulator, plays stable downstream pressure effect, can better guaranteed flow controller measuring accuracy.
Self there is saturation vapour pressure because the dimethyl ether tank 3 being provided with dimethyl ether is interior, during normal temperature 20 DEG C, pressure is 0.5MPa, in order to make dimethyl ether, first alcohol and water fully mixes smoothly, the water in the methyl alcohol in methanol tank 2 and water pot 1 is needed to be pressurized to 0.5MPa, realized by pre-pressurization system 4, described pre-pressurization system 4 comprises membrane pump with pneumatic drive, first alcohol and water is pressurized to 0.5MPa by described membrane pump with pneumatic drive, the advantage of membrane pump with pneumatic drive is compressed air-driven, without the need to electricity consumption, pressure can steadily export, and pressure surge is less.
Described mixing weighing system 5 comprises mixer 8, described mixer 8 is connected with the switch valve 1, switch valve 2 10 and the switch valve 3 11 that are in parallel, and described switch valve 1, switch valve 2 10 and switch valve 3 11 connect water pot 1, methanol tank 2 and dimethyl ether tank 3 respectively by flow dontroller 1, flow dontroller 2 13 and flow dontroller 3 14; Described flow dontroller 1, flow dontroller 2 13 and flow dontroller 3 13 include flowmeter, flow control valve and proportional/integral/derivative PID feedback means.
Described mixing weighing system 5 is primarily of 5 flow dontrollers and supporting valve pipe fitting, and mixer 8 forms, and flow dontroller accurately can control the flow value of each medium kind; Described mixer 8 can ensure methyl alcohol, dimethyl ether and water more fully evenly stroke fuel combination, when motor 7 combustion, combustion value is higher, and contributes to reducing the pollutant load in exhaust emissions.
Due to the main fuel that methyl alcohol is fuel test system, the mixed proportion of dimethyl ether and water is all for radix with the flow of methyl alcohol, be multiplied by suitable scaling factor again and carry out mixing match, the combustion characteristic under each mixed proportion of test dimethyl ether and water, thus draw optimum mixing match.
The flow control of methyl alcohol has been come by described flow dontroller 2 13, described flow dontroller 2 13 is become one at mass flowmenter and flow control valve, and described flow dontroller 2 13 inside is also provided with PID feedback means, flow value is adjusted in real time by PID feedback means, have the reaction time fast, flow is effect more accurately.
Wherein, the flow instruction of flow dontroller is inputted by the interface of automatical control system, can also input the proportion coefficient of water and dimethyl ether, after having inputted, during system cloud gray model, flow control can adjust the flow value of water and dimethyl ether at any time according to the actual flow of methyl alcohol simultaneously.
This online proporting system in real time, faster than traditional hybrid system reaction velocity, mixing evenly, and avoid the waste of material, save cost.
Described pressurization system 6 comprises suction booster 15, and described suction booster 15 is connected with through the mixed fuel of mixer 8, and described suction booster 15 connecting engine 7, described motor 7 connects fuel combination reflux by back pressure valve 18; Safety valve 16 and knock out drum 17 is connected in parallel between described suction booster 15 and motor 7; Described suction booster 15 is Pneumatic booster pump, and described back pressure valve 18 is electric-controlled type back pressure valve.
Described pressurization system 6 mainly comprises Pneumatic booster pump, back pressure valve 18, safety valve 16, Decompression valves and instrument; Described pressurization system 6 is mainly downstream engine 7 and provides fuel under high pressure, and postcombustion consumption at any time; The pressure surge of the fuel under high pressure entering motor 7 can control 2% by the effect of described back pressure valve 18.
Described pressurization system 6 is that mixed methanol-based fuel combination is pressurized to by Pneumatic booster pump the working pressure that internal-combustion engine (diesel engine) needs, and after downstream internal-combustion engine (diesel engine) consume fuel rapid postcombustion, described pressurization system 6 mainly realizes concrete function by Pneumatic booster pump and electric-controlled type back pressure valve.
Wherein, described gas boosting pump has following characteristics: (1) compressed media drives: without producing heat, Mars and spark hazard; (2) inlet pressure range is wide: can regulate arbitrarily driver frequency and output flow, and inlet pressure; (3) easily realize automatically controlling: supercharging equipment is reserved with external control port, when there being control signal in external control port, supercharging equipment just has the possibility of normal work, therefore, utilize outside control mouth to coordinate control unit, easily can realize supercharging equipment autostop under any predetermined pressure; Equipment between down period Non-energy-consumption, do not produce heat; (4) can stop continuously/start shooting, unrestrictedly, have no adverse effect.
Relatively and motor-drive pump, Pneumatic booster pump has safe and reliable, without the need to electricity consumption, greatly reduces the advantage of the danger of test site, and Pneumatic booster pump can frequent start and stop with pressure, more meet the actual service condition of test system.
Described electric-controlled type back pressure valve has following characteristics: in order to test the combustion characteristic of methanol-based fuel, require that testing precision is higher, the pressure surge in downstream all can impact the oil consumption of motor 7 and combustion characteristic, in order to keep the pressure stability entering motor 7 as much as possible, by the electric-controlled type back pressure valve set up, can regulate back pressure valve according to downstream real-time pressure value, when testing the working condition under different pressures without the need to manual operation, precision is higher.
Auto-cool system is provided with between described motor 7 and pressurization system 6.
As shown in Figure 4, this device is also provided with automatical control system, and described automatical control system comprises PLC 19, and described PLC 19 is connected to load module 20, output module 21 and process control machine 22, described load module 20 connecting sensor unit 23, described output module 21 connection traffic controller; This device can in the start and stop of all elements of remote operating system by automatical control system, and the real-time working situation of monitoring element; Once be in an emergency, system can autostop.
Described PLC 19 from the electrical signal of sensor unit 23, calculates the solenoid valve and the flowmeter that are then controlled every part by output module 21, to reach the control overflow of flow and pressure as the core accepts of this system through conversion; PLC air device 19 selects the PLC of Omron CP1H-X40DRA series, the PLC of Omron series industrial control field use boundless, technology maturation very.This makes equipment very stable when operation, and antijamming capability is very strong.The hardware of automatical control system also comprises sensing unit, output module, relay etc.
Described sensor unit 23 is made up of sensor, comprises pressure, temperature, flow, and the sensor that weight etc. are dissimilar is converted to electrical signal the physical signalling in system, is transferred in PLC 19.
During concrete use, this system mainly uses Methanol Blends (main component is methyl alcohol, water and dimethyl ether) to replace traditional diesel oil as fuel in motor combustion, the combustion characteristic of test Methanol Blends is also assessed fuel combination and is replaced the Security of traditional fuel, Economy and feasibility analysis, mainly comprises water pot 1, methanol tank 2, dimethyl ether tank 3, pre-pressurization system 4, mixing weighing system 5 and pressurization system 6 form; Medium in methanol tank 2 and water pot 1 is by pre-pressurization system 4 supercharging (pressurized air enters into pre-pressurization system 4, as power source by compressed air plant) voltage stabilizing; To be water and methyl alcohol keep certain pressure entering between mixing weighing system for the effect of described pre-pressurization system 4, to overcome the resistance of medium in metering and pipeline, and keeps certain flowing velocity; It is because the physical property (volatile) of dimethyl ether itself determines dimethyl ether tank interior carry certain pressure that dimethyl ether does not need to carry out pre-supercharging.
After water after pre-supercharging and methyl alcohol enter mixing weighing system 5, carry out online mixing with dimethyl ether according to certain ratio (ratio is adjustable), after the mixing of each medium, after mixer 8 stirs, enter pressurization system 6; The critical piece of mixing weighing system 5 is flow transducers of tape controller, the flow of water, methyl alcohol and dimethyl ether can be controlled in real time by this sensor, can ensure that the composition of the fuel combination in pipeline is adjustable, flow is adjustable, and can not cause the waste of fuel combination.
Described mixing weighing system 5 is with the original creation part of present existing hybrid system: use traffic controls sensor to replace existing storage pot type fuel mix method, flow dontroller inside is integrated with flowmeter and flow control valve, and inside carries PID feedback control, can according to the aperture of the target instruction target word flow automatic regulation control valve of flow control flowmeter, and regulate this opening value by the value of feedback of flowmeter, thus reach the dual order ground controlling flow and measuring flow.
Fuel combination through stirring enters pressurization system 6 and is pressurized to engine target value (100MPa) and does not stop to keep Output pressure to stablize when consuming fuel combination at motor 7, the working principle of described pressurization system 6 utilizes pressurized air fuel combination to be pressurized to engine target value for power, but due to Pneumatic booster pump characteristics and downstream engine 7 do not stop consume, during actual motion, pressurization system outlet pressure is fluctuating always; Stablize for keeping pressurization system 6 outlet pressure, we add an automatically controlled back pressure valve in the outlet port of pressurization system 6, when pressurization system 6 and motor 7 fuel pressure exceed the setting value of back pressure valve 18, back pressure valve 18 can open pressure release, until pressurization system 6 and motor 7 fuel pressure are no more than back pressure valve 18 setting value; When pressurization system 6 actual motion, the pressure of the Pneumatic booster pump in pressurization system 6 and flow are all greater than the requirements of motor 7, and back pressure valve 18 is in open mode always, and whole system is in a kind of dynamic balance; Can keep the pressure stability of fuel combination in pressurization system 6 and motor 7, and when motor 7 test needs to change test pressure value, only need the setting value changing automatically controlled back pressure valve, pressurization system 6 can continue test under new pressure condition.
Whole hardware of this device are installed in four and independently prize at the bottom of unit, and end sled is provided with forklift hole, to facilitate equipment moving; Each unit inside comprises again some little modules, and these little modules are fixed on sled at the bottom of unit, can dismounting flexibly, facilitates the maintenance and repair of equipment; Unit box shell adopts cabinet type making, outside paint baking, opens the door convenient, to facilitate installation or the maintenance of internal module.
All unit internal pipelines adopt stainless steel manufacture (except part drives air pipe), to prevent the corrosion of water; Cabinet material carries out antirust treatment, and non-corroding comes off without coating, and in cabinet, exterior skin is smooth, without any delamination warpage; In box body, each electric loop over the ground and mutual insulating resistance value, ambient temperature 15 ~ 35 DEG C, when relative air humidity 45% ~ 75%, is not less than 20M Ω; Each individual electrical loop and can bear 50Hz each other, alternating voltage 1000V, lasts 1min without puncturing flashover; Each unit box is convenient to installation and removal.The reliable locking of its door, window, can not open when equipment runs automatically, and cabinet inner panel wall adopts low heat transfer material, smooth surface, smooth, without obviously concavo-convex.
System pipeline meets flow chart requirement, piping layout is attractive in appearance, reasonable, install firmly, be easy to demolition, repair, replacement, pipeline has good tightness, lasts 5min answer ne-leakage phenomenon under 1.05 times of design pressures do air tightness test, all need check, maintenance, decompose, repair component all there is good accessibility, and measure according to human body, suitable service clearance is provided, maintenance man is had and more reasonably keeps in repair attitude.
This device has carried out modular division, and each module has certain independence, improves the interchangeability of product, maintenance, also saves development cost simultaneously; And successfully have employed the method for Pneumatic booster advanced in the world at present, the flow process of the method is advanced, simple, host performance is excellent, comprehensive, and the source of goods, the quality of raw material, components and parts, component and corollary equipment are guaranteed, and has the incomparable explosion-proof performance of motor; Whole system automaticity is high, easy and simple to handle, easy to maintenance, and starting time is short, and work safety is reliable and stable, and complete unit has more perfect automatic monitor system and reliable safety assurance system, improves the safety reliability of system.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a methanol-based fuel high pressure feeder apparatus, comprise and be respectively equipped with alcohol, the methanol tank (2) of water and dimethyl ether, water pot (1) and dimethyl ether tank (3), it is characterized in that, described methanol tank (2) and water pot (1) are all connected with pre-pressurization system (4), described dimethyl ether tank (3) is connected with mixing weighing system (5), described pre-pressurization system (4) is connected with described mixing weighing system (5), described mixing weighing system (5) is connected with motor (7) with pressurization system (6) successively, and, described pressurization system (6) and pre-pressurization system (4) are all connected with compressed air plant.
2. methanol-based fuel high pressure feeder apparatus according to claim 1, it is characterized in that, described mixing weighing system (5) comprises mixer (8), described mixer (8) is connected with the switch valve one (9), switch valve two (10) and the switch valve three (11) that are in parallel, and described switch valve one (9), switch valve two (10) and switch valve three (11) connect water pot (1), methanol tank (2) and dimethyl ether tank (3) respectively by flow dontroller one (12), flow dontroller two (13) and flow dontroller three (14).
3. methanol-based fuel high pressure feeder apparatus according to claim 2, it is characterized in that, described flow dontroller one (12), flow dontroller two (13) and flow dontroller three (13) include flowmeter, flow control valve and proportional/integral/derivative PID feedback means.
4. methanol-based fuel high pressure feeder apparatus according to claim 1, it is characterized in that, described pressurization system (6) comprises suction booster (15), described suction booster (15) is connected with through mixer (8) mixed fuel, and described suction booster (15) connecting engine (7), described motor (7) connects fuel combination reflux by back pressure valve (18).
5. methanol-based fuel high pressure feeder apparatus according to claim 4, is characterized in that, is connected in parallel to safety valve (16) and knock out drum (17) between described suction booster (15) and motor (7).
6. methanol-based fuel high pressure feeder apparatus according to claim 4, is characterized in that, described suction booster (15) is Pneumatic booster pump.
7. methanol-based fuel high pressure feeder apparatus as claimed in any of claims 1 to 6, is characterized in that, is provided with auto-cool system between described motor (7) and pressurization system (6).
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| CN201410502556.0A CN104265450B (en) | 2014-09-26 | 2014-09-26 | Methanol-based fuel high-pressure supplying device |
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| CN201410502556.0A CN104265450B (en) | 2014-09-26 | 2014-09-26 | Methanol-based fuel high-pressure supplying device |
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| CN105617924A (en) * | 2016-03-16 | 2016-06-01 | 熊菊莲 | Safe and reliable mixing device |
| CN105617899A (en) * | 2016-03-16 | 2016-06-01 | 熊菊莲 | Device for gas-liquid mixing |
| CN105617897A (en) * | 2016-03-25 | 2016-06-01 | 熊菊莲 | Mixer |
| CN105688703A (en) * | 2016-03-25 | 2016-06-22 | 熊菊莲 | Safe and reliable mixer |
| CN105749775A (en) * | 2016-03-16 | 2016-07-13 | 熊菊莲 | Gas-liquid mixing device |
| CN108533422A (en) * | 2018-01-23 | 2018-09-14 | 中国第汽车股份有限公司 | A kind of Alcohol engines water mixing spraying system and water mixing injection method |
| CN111520258A (en) * | 2020-04-30 | 2020-08-11 | 南方科技大学 | Compression ignition type methanol engine combustion system and control method |
| CN111520259A (en) * | 2020-04-30 | 2020-08-11 | 南方科技大学 | Ignition type methanol engine combustion system and control method |
| WO2021217601A1 (en) * | 2020-04-30 | 2021-11-04 | 南方科技大学 | Compression-ignition type methanol engine combustion system and control method |
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| CN111520258A (en) * | 2020-04-30 | 2020-08-11 | 南方科技大学 | Compression ignition type methanol engine combustion system and control method |
| CN111520259A (en) * | 2020-04-30 | 2020-08-11 | 南方科技大学 | Ignition type methanol engine combustion system and control method |
| WO2021217601A1 (en) * | 2020-04-30 | 2021-11-04 | 南方科技大学 | Compression-ignition type methanol engine combustion system and control method |
| CN111520259B (en) * | 2020-04-30 | 2023-08-18 | 南方科技大学 | Ignition type methanol engine combustion system and control method |
| CN111520258B (en) * | 2020-04-30 | 2023-08-18 | 南方科技大学 | Compression ignition type methanol engine combustion system and control method |
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