CN103791513B - A kind of dimethyl ether gas-fired boiler energy-saving efficient carburator - Google Patents
A kind of dimethyl ether gas-fired boiler energy-saving efficient carburator Download PDFInfo
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- CN103791513B CN103791513B CN201410003170.5A CN201410003170A CN103791513B CN 103791513 B CN103791513 B CN 103791513B CN 201410003170 A CN201410003170 A CN 201410003170A CN 103791513 B CN103791513 B CN 103791513B
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- dimethyl ether
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Abstract
A kind of dimethyl ether gas-fired boiler energy-saving efficient carburator, by carburetor body (1), heat exchange coil (2), electric heating tube (3), gaseous fuel outlet (4), liquid fuel import (5), water circulating pump (6), snakelike heat exchange tube (7), thermocouple (8), lower louver type baffle (9), upper louver type baffle (19), mid-board (10), back-end ductwork (11) forms；During boiler startup, take electrically heated form vaporization fuel；In boiler properly functioning period, take the form vaporization fuel that fume afterheat heats, and take the mode regulating sweep of gases amount to regulate carburretion amount.Instant invention overcomes that traditional water bath formula carburator control performance is poor, safety and the low problem of stability, and there is the advantage that power consumption is little, good economy performance, generatine set heat efficiency are high；Enough gaseous dimethyl can be supplied for combustor with security and stability, be particularly well-suited to Large Copacity dimethyl ether fuel gas Industrial Boiler.
Description
Technical field
The invention belongs to the subsidiary engine equipment of gas fired-boiler and system, particularly to a kind of dimethyl ether gas-fired boiler energy-saving efficient carburator.
Background technology
Dimethyl ether is a kind of Novel clean-fuel grown up in recent years, it is possible to converts on a large scale from the traditional fuel such as coal, biomass and produces, and has cleaning, efficient, safe and environment-friendly feature, be each main advanced country of the world try to be the first research object.Correlational study proves that dimethyl ether is in combustion without residual liquid, residue discharge, and CO and each Air Pollutants discharge capacity are all very low；The calorific value of unit volume dimethyl ether/air premix gas is bigger than conventional gas fuel；Efficiency of combustion is high.Dimethyl ether, as fuel, is currently mainly applied to the aspect such as automobile, civil kitchen range, for substituting diesel oil and the liquefied petroleum gas of a part.Promote the dimethyl ether application in Industrial Boiler field, for promoting that the energy-conserving and environment-protective cause of China is significant.But, gaseous state it is at normal temperatures and pressures due to dimethyl ether, it is usually stored in cylinder for liquefied gas after compression, therefore, needs before the use it is vaporized process.Advanced combustion gas vaporisation techniques is a key technology of popularization and application dimethyl ether gas-fired boiler.Meanwhile, combustion gas vaporization need to absorb the substantial amounts of latent heat of vaporization, and finding cheap vaporization thermal source, improving the economy of carburator is also an importance of the advanced vaporisation techniques of research and development.
Carburator patented technology known at present is broadly divided into two big classes: air temperature type and water-bath type.
The principle of air temperature type vaporisation techniques is by carburretion using air as thermal source.Have an advantage in that its thermal source is cheap air, can effectively reduce unit power consumption, improve economy.It has drawbacks in that the heat transfer temperature difference of (1) air temperature type vapourizing unit is little, and heat transfer coefficient is low, the heating surface area that need to arrange is relatively big, causes that the volume of separate unit vapourizing unit and floor space are bigger.(2) improve air eroding velocity for strengthening heat transfer effect, the increase of blower fan power consumption can be caused.(3) along with equipment uses the increase of time, heat-transfer surface frost is more serious, causes its vaporization performance considerable decrease.(4) air temperature type gasification installation is only applicable to supply combustion gas for small-load generators.
The principle of water-bath type vaporisation techniques is that hot water is generally produced by electrical heating by carburretion with water for thermal medium, as: " dimethyl ether is at the application of Industrial Boiler and feeder thereof " (application number: 201010548844.1)；" a kind of dimethyl ether liquefied gas electric heating type economizer " (application number: 201120291873.4).Have an advantage in that heat transfer temperature difference and the coefficient of heat transfer be big, thermal medium homogeneous temperature, vaporization stable performance, volume and the floor space of single unit are little, it is adaptable to supply combustion gas for large-scale combustion apparatus.Its shortcoming is in that thermal medium is produced by electrical heating, and economy is bad.For dimethyl ether, the liquid dimethyl ether of 1.0 tons of vaporizing, minimum power consumption is 114kW h.Although also some water bath type vaporizer adopts fume afterheat as vaporization thermal source (such as " a kind of dimethyl ether heating device adopting boiler chimney waste-heat water tank " (application number: 201120212616.7)), but during ignition of the boiler, because making vaporization thermal source without high-temperature flue gas, the type carburator cannot ensure enough combustion gas that igniting is required.Meanwhile, during boiler operatiopn, evaporating capacity is lacked effective control and adjustment by it；After the hot water in water tank seethes with excitement, unnecessary steam discharged to air, causes that economy reduces by evacuated tube；After running all the year round, if evacuated tube is by fouling and clogging, water tank such as easily sets off an explosion at the accident under internal boiling water effect.Therefore, the type carburator poor-performing in economy, safety, stability etc., it is difficult to adapt to dimethyl ether popularization and application on large-scale burner.
Summary of the invention
The purpose of the present invention is contemplated to overcome the deficiency of above-mentioned background technology, and a kind of dimethyl ether gas-fired boiler energy-saving efficient carburator is proposed, this carburator can be prevented effectively from the existing problem that water bath type vaporizer economy is low, fluctuation of service, poor safety performance, automaticity are low, adapt to the maximization development of dimethyl ether gas-fired boiler, enough fuel gas are provided safely and steadly for it.
Dimethyl ether gas-fired boiler energy-saving efficient carburator involved in the present invention, is made up of carburetor body, heat exchange coil, electric heating tube, water circulating pump, snakelike heat exchange tube, upper louver type baffle, lower louver type baffle, thermocouple, back-end ductwork and a mid-board；Described heat exchange coil, electric heating tube, thermocouple are arranged in inside carburetor body；The flow area of described back-end ductwork is divided into upper and lower two passages by mid-board, and the import department of upper channel is provided with louver type baffle, and lower channel is sequentially installed with lower louver type baffle and snakelike heat exchange tube along flow of flue gas direction；Described back-end ductwork adopts the form of Flange joint to be connected with boiler body and chimney；The internal cavities of described water circulating pump, snakelike heat exchange tube and carburetor body forms a closed circuit closed, thermal medium water is by the sequential loop of " carburetor body → water circulating pump → snakelike heat exchange tube → carburetor body ", fume afterheat is conveyed in carburetor body, heating vaporization fuel.
The dimethyl ether gas-fired boiler energy-saving efficient carburator of the present invention overcomes that traditional water bath formula carburator control performance is poor, safety and the low problem of stability, and power consumption is little, good economy performance, generatine set heat efficiency high；Under the premise not configuring gas storage tank, with security and stability for the gaseous dimethyl that combustor supply is enough, Large Copacity dimethyl ether fuel gas Industrial Boiler can be particularly well-suited to.
Accompanying drawing explanation
Fig. 1 is carburetor structure schematic diagram described in the embodiment of the present invention；
Fig. 2 is the carburator of the present invention scheme of installation in dimethyl ether gas-fired boiler system；
In above-mentioned accompanying drawing, 1 carburetor body, 2 heat exchange coils, 3 electric heating tubes, 4 gaseous fuel outlet, 5 liquid fuel imports, 6 water circulating pumps, 7 snakelike heat exchange tubes, 8 thermocouples, 9 times louver type baffles, louver type baffle on 19,10 mid-boards, 11 back-end ductworks, 12 dimethyl ether fluid reservoirs, 13A Pressure gauge, 14 gas pressure-reducing valves, 15 filters, 16 combustors, 17 boiler bodies, 18 chimneys, 20B Pressure gauge.
Detailed description of the invention
Below in conjunction with Figure of description and embodiment, the invention will be further described.
Embodiment
The present embodiment is dimethyl ether gas-fired boiler energy-saving efficient carburator, and its structure is as it is shown in figure 1, this carburator is by carburetor body 1, heat exchange coil 2, electric heating tube 3, gaseous fuel outlet 4, liquid fuel import 5, water circulating pump 6, snakelike heat exchange tube 7, thermocouple 8, lower louver type baffle 9, upper louver type baffle 19, mid-board 10, back-end ductwork 11 forms；Wherein, heat exchange coil 2, it is internal that electric heating tube 3 and thermocouple 8 are arranged on carburetor body 1；Gaseous fuel outlet 4, liquid fuel import 5 are connected with the two ends of heat exchange coil 2 respectively, and are arranged on the outside of carburetor body 1；Liquid fuel flows through heat exchange coil 2 heat absorption vaporization；The internal cavities of water circulating pump 6, snakelike heat exchange tube 7 and carburetor body 1 forms a closed circuit closed, thermal medium water is circulated by the order of " carburetor body 1 → water circulating pump, 6 → snakelike heat exchange tube, 7 → carburetor body 1 ", the fume afterheat at back-end ductwork 11 place is delivered in carburetor body 1, is used for heating vaporization fuel；The flow area of back-end ductwork 11 is divided into upper and lower two passages by mid-board 10, and the import department of upper channel is provided with louver type baffle 19, and lower channel is sequentially installed with lower louver type baffle 9 and snakelike heat exchange tube 7 along flow of flue gas direction；Back-end ductwork 11 takes the form of Flange joint to be connected with boiler body 17 and chimney 18.
Carburator of the present invention, during ignition of the boiler, is taked electrical heating as vaporization thermal source, is supplied combustion gas for combustor；In boiler properly functioning period, take fume afterheat heating as vaporization thermal source, supply combustion gas for combustor.Meanwhile, this carburator takes the mode of sweep of gases amount regulating snakelike heat exchange tube that temperature and the gas production of heat source medium water are adjusted, whole adjustment process safety, stable, reliable.
The work process of the carburator described in the present embodiment is as follows:
During ignition of the boiler, electric heating tube 3 works independently, and heats thermal medium water, as vaporization thermal source；
After boiler is properly functioning, electric heating tube 3 disconnects, and water circulating pump 6, snakelike heat exchange tube 7, upper louver type baffle 19 and lower louver type baffle 9 put into operation, heats thermal medium water, as vaporization thermal source；
Simultaneously, during boiler operatiopn, (as boiler load changes) after boiler operatiopn operating mode changes, the temperature of exhaust gas temperature and thermal medium water can change therewith, now, its respective aperture can the hot water temperature measured by thermocouple 8 be automatically adjusted by upper louver type baffle 19 and lower louver type baffle 9, change the exhaust gas volumn washing away snakelike heat exchange tube 7, to adapt to the change of boiler flue gas demand, avoid waste heat to assemble in carburetor body 1 and the potential safety hazard that causes simultaneously.When general work, upper louver type baffle 19 standard-sized sheet, when the water temperature that thermocouple 8 is surveyed reduces, the aperture of described lower louver type baffle 9 becomes big automatically, to guarantee that hot water temperature is stable；If during lower louver type baffle 9 standard-sized sheet, hot water temperature still can not effectively be gone up, then the aperture going up louver type baffle 19 diminishes, and increases the exhaust gas volumn washing away snakelike heat exchange tube 7, promotes water temperature；If water temperature still can not effectively promote, then open electric heating tube 3, take the form of " electrical heating+fume afterheat heating " to promote water temperature, produce enough stable combustion gas；Otherwise, when the water temperature that thermocouple 8 is surveyed raises, system disconnects the aperture of louver type baffle 19 in electric heating tube 3, increase successively, reduces the aperture of lower louver type baffle 9, regulates water temperature.
The carburator of the present invention installation in dimethyl ether gas-fired boiler system is as shown in Figure 2.Carburettor arrangement is at back-end ductwork place.During boiler operatiopn, the liquid dimethyl ether in dimethyl ether fluid reservoir 12 enters the heat exchange coil 2 in carburetor body 1, heat absorption vaporization, converts fuel gas to；Afterwards, gaseous dimethyl is through gas pressure-reducing valve 14 blood pressure lowering, and after filter 15 filters, is admitted to combustor 16 and burns, and A Pressure gauge 13 is used for the pressure before showing gas pressure-reducing, and B Pressure gauge 20 is used for the pressure after showing gas pressure-reducing.
Claims (1)
1. a dimethyl ether gas-fired boiler energy-saving efficient carburator, is characterized in that this carburator is by carburetor body (1), heat exchange coil (2), electric heating tube (3), gaseous fuel outlet (4), liquid fuel import (5), water circulating pump (6), snakelike heat exchange tube (7), thermocouple (8), lower louver type baffle (9), upper louver type baffle (19), mid-board (10), back-end ductwork (11) forms；Wherein, heat exchange coil (2), it is internal that electric heating tube (3) and thermocouple (8) are arranged on carburetor body (1)；Gaseous fuel outlet (4), liquid fuel import (5) are connected with the two ends of heat exchange coil (2) respectively, and are arranged on the outside of carburetor body (1)；The internal cavities of water circulating pump (6), snakelike heat exchange tube (7) and carburetor body (1) forms a closed circuit closed, thermal medium water is circulated by the order of " carburetor body (1) → water circulating pump (6) → snakelike heat exchange tube (7) → carburetor body (1) ", the fume afterheat at back-end ductwork (11) place is delivered in carburetor body (1), is used for heating vaporization fuel；The flow area of back-end ductwork (11) is divided into upper and lower two passages by mid-board (10), and the import department of upper channel is provided with louver type baffle (19), and lower channel is sequentially installed with lower louver type baffle (9) and snakelike heat exchange tube (7) along flow of flue gas direction；Back-end ductwork (11) takes the form of Flange joint to be connected with boiler body (17) and chimney (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003170.5A CN103791513B (en) | 2014-01-03 | 2014-01-03 | A kind of dimethyl ether gas-fired boiler energy-saving efficient carburator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410003170.5A CN103791513B (en) | 2014-01-03 | 2014-01-03 | A kind of dimethyl ether gas-fired boiler energy-saving efficient carburator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103791513A CN103791513A (en) | 2014-05-14 |
| CN103791513B true CN103791513B (en) | 2016-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410003170.5A Expired - Fee Related CN103791513B (en) | 2014-01-03 | 2014-01-03 | A kind of dimethyl ether gas-fired boiler energy-saving efficient carburator |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111306596A (en) * | 2020-02-26 | 2020-06-19 | 华电电力科学研究院有限公司 | Efficient flue gas waste heat utilization system of gas combined supply system and operation method thereof |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084459C (en) * | 1998-10-30 | 2002-05-08 | 清华大学 | Burner of light oil for gasifying type conbustion |
| CN101871731A (en) * | 2010-06-02 | 2010-10-27 | 昆明理工大学 | Large-scale industrial combustion method of dimethyl ether |
| CN201852125U (en) * | 2010-11-18 | 2011-06-01 | 昆明龙鑫洋塑料防腐设备制造有限责任公司 | Dimethyl ether gas supply device for industrial boiler |
| CN202253715U (en) * | 2011-08-11 | 2012-05-30 | 李卫教 | Dimethyl ether liquefied gas electric heating type economizer |
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Granted publication date: 20160706 Termination date: 20180103 |