The air heating apparatus of liquid in visual pipeline
Technical field
The present invention relates to the heating of liquid in visual pipeline, particularly the air heating apparatus of liquid in visual pipeline.
Background technology
In chemical field, need external heat could guarantee the carrying out of reaction or the speed of raising reaction in a large amount of chemical reactions.Simultaneously carry out real-time monitored and control for the process to chemical reaction, the carrying out of some chemical reactions need obtain enough external heat sources in the industry under the visual situation of chemical reaction state.In addition, in the scientific experiment, need the chemical experiment of heating to carry out hourly observation in a large number to the phenomenon of chemical reaction; In addition, the experiment of the flowing heat transfer of two-phase such as some vapour-liquids of carrying out under heating state, profit and multiphase flow also need be carried out in visual water back, to carry out the observation and analysis of experimental phenomenas such as flow pattern, steam quality.
Patent CN201039503 has described a kind of electrically heated glass.This electrically heated glass resistance wire of between glassy layer, evenly arranging.After the electrically heated glass energising, can heat the glass both sides.But in order to guarantee the transparent effect of glass, the density of resistance wire and diameter are all wanted strict restriction.Therefore, the heating power of electrically heated glass is relatively low, generally is applied to automobile, the defrosting of train windshield, demist.
Summary of the invention
The objective of the invention is to overcome above-mentioned prior art deficiency, a kind of air heating apparatus of liquid in visual pipeline is provided, this device can carry out the device that high power heats by convection cell under real-time monitored fluid state situation, and the adjustable power of heating.
For achieving the above object, the present invention has adopted following technical scheme: utilize the air heat case that air is heated, as the thermal source that adds hot fluid; The tube wall of the fluid line of observation section is resistant to elevated temperatures quartz glass; Utilize air blast the high temperature air in the air heat case to be sent in the observation case that has observation window, the quartz glass pipeline inner fluid that passes the observation case is heated; Regulate the electrical power of heating rod in air blast or the air heat case, can control the heat flow density that high temperature air adds hot fluid.
The inlet of air heat case of the present invention is connected with an air blast, and its outlet is connected to the air intake of observation case by the high temperature air valve; Fluid line passes from observation case inside, two relative sidewalls of observation case are provided with observation window, the fluid line pipeline section parallel with observation window is quartz glass observation pipeline, between quartz glass observation pipeline and the observation case is the runner of high temperature air, fluid in the quartz glass observation pipeline is heated in this passage by the high temperature air after the heating of air heat case, enter atmosphere via the air outlet slit of observing case.
Intermesh on the air heat case tank wall and be connected with steel plate, box house is divided into a plurality of measure-alike rectangular flow that are connected with each other threads a pipe, each circulation duct with the flow layout electrically heated rod of vertical direction equal intervals of air.
Fluid line comprises fluid intake pipeline, outlet conduit and quartz glass observation pipeline, and quartz glass observation pipe ends connects inlet duct and outlet conduit respectively.
Three layers of transparency and heat-proof quartz glass plate are set, heat-insulation and heat-preservation when guaranteeing real-time monitored quartz glass observation pipeline inner fluid heating situation on the described observation window.
Air heat case, observation case and be positioned at the fluid intake of observation case Outboard Sections and the outer setting of outlet conduit has heat-insulation layer.
The present invention adopts colourless high temperature air that quartz glass observation inner fluid passage is heated.At first guarantee fluid good transparent effect in heating process; Secondly because the silicon-carbon electrically heated rod in the air heat case can be with air heat to very high temperature, the pipeline inner fluid can obtain very high heating power from high temperature air.In quartz glass observation section, high temperature air can be heated to the two-phase fluidized state with the fluid under certain inlet temperature easily.
Description of drawings
Fig. 1 is the structural representation of air heat case;
Fig. 2 is the scheme of installation of electrically heated rod;
Fig. 3 is the structural representation of the air heating apparatus of liquid in visual pipeline;
Below in conjunction with accompanying drawing content of the present invention is described in further detail.
The specific embodiment
With reference to shown in Figure 1, air electrical heating case 2 is a rectangle stainless steel casing.Air electrical heating case 2 inside are welded on the steel plate 4 on the tank wall by intermeshing, box house is divided into a plurality of measure-alike rectangular flow circulation passage that are connected with each other.After normal temperature air is sent in the air electrical heating case 2 by air blast 1, under the restriction of each steel plate 4, turn back successively along curve and to flow through behind each passage, flow out from 2 outlets of air electrical heating case.Increased the circulation distance of air, increased the time that air is heated, helped improving the outlet temperature of air, reduced the casing self-temperature in air heat case 2 inside.Air electrical heating case 2 sidewall two sides have equally spaced circular hole along rectangular channel, in order to the flow layout electrically heated rod 3 of vertical direction equal intervals of air.
With reference to shown in Figure 2, electrically heated rod 3 is the cylinder Elema.Be inserted in behind several layers of aluminium foil 12 of electrically heated rod 3 two ends parcel in the separation sleeve 13 of pottery location.By pottery location separation sleeve 13 it is stuck in air electrical heating case 2 sidewall circular hole places, makes electrically heated rod 3 and 2 isolation of air electrical heating case and play the effect of location.Between air electrical heating case 2 and the location separation sleeve 13, between location separation sleeve 13 and the electrically heated rod 3 small gap is arranged all, guarantee that the deformation that causes under the hot operation condition can not cause crisp hard silicon-carbon electrically heated rod 3 fractures.Two electrodes of power supply are clipped to aluminium foil place, electrically heated rod 3 two ends, regulate the heating power that power source voltage can change electrically heated rod 3.Silicon-carbon electrically heated rod 3 can the operating temperature with 1450 ℃ use 7000 hours in the air of dried and clean continuously, and maximum operating temperature can reach 1500 ℃.In the flow process, constantly stream high temperature silicon-carbon electrically heated rod 3 in the tortuous runner of normal temperature air in air electrical heating case 2.Behind tens of electrically heated rods 3 heat temperature raisings, in the exit of air heat case 2, air themperature can reach 400~500 ℃.
With reference to shown in Figure 3, the inlet of air heat case 2 is connected with an air blast 1, by air blast 1 extraneous air is sent in the air heat case 2.Air air heat case 2 invaginations backflow moving in, by the electrically heated rod heat temperature raising.High temperature air enters air flow channel in the outer observation case of fluid line 7 by the air intake of observation case 7 behind high temperature air valve 5.
Observation case 7 is the stainless steel cuboid, and two opposing sidewalls has rectangle observation window 8.Observation window 8 has been riveted three layers of vitreosil glass plate heat-insulation and heat-preservation when guaranteeing real-time monitored quartz glass observation pipeline 9 inner fluid situations.Fluid line is made up of fluid intake pipeline 10, quartz glass observation pipeline 9 and fluid issuing pipeline 11.The observation fluid can be heated by the high temperature air in the tube wall outside enter observation case 7 via fluid intake pipeline 10 after.At whole section quartz glass observation pipeline 9, the various states of fluid under heating condition can be observed via observation window 8.In addition, can also be outside observation case 7 one side observation windows 8 behind the certain light source of layout, heated state in pipeline is carried out real time record with camera or video camera convection cell at observation case 7 one side observation windows 8 places, for detail analysis.
By the air output of change air blast 1 or the heating power of silicon-carbon electrically heated rod 2, thereby the flow velocity and the temperature of change fluid line outside high temperature air are regulated the heat flow density of high temperature air heating tube inner fluid with this.After the fluid heating in the high temperature air convection cell pipeline, enter atmosphere via the air outlet slit of observing case 7.Air heat case 2, observation case 7 and the fluid intake and the outlet conduit 10,11 that are positioned at observation case 7 outsides all wrap up heat-insulation layer, to reduce the dissipated heat of whole device in environment.