CN103033532A - Experimental device for condensation heat-exchange of steam containing multi-component non-condensable gases - Google Patents
Experimental device for condensation heat-exchange of steam containing multi-component non-condensable gases Download PDFInfo
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Abstract
The invention provides an experimental device for condensation heat-exchange of steam containing multi-component non-condensable gases. The experimental device comprises a steam supply system, an air supply system, a supply system of other gases, a cooling water system and a condensation experiment body, wherein the condensation experiment body comprises a shell and an experimental pipe arranged in the shell; the upper part and the lower part of the shell are respectively provided with an upper gas inlet pipe and a lower gas inlet pipe; an upper gas inlet valve and a lower gas inlet valve are respectively mounted on the upper gas inlet pipe and the lower gas inlet pipe; a main pipeline, which is formed after the upper gas inlet pipe and the lower gas inlet pipe are connected in parallel, is connected with the steam supply system, the air supply system and the supply system of other gases; the bottom of the shell is connected with a condensate tank; the steam is condensed in the condensation experiment body, and then the condensate flows down into the condensate tank from the bottom of the shell and is drained through a drain valve; and the upper end and the lower end of the experimental pipe are connected with the cooling water system. According to the experimental device for condensation heat-exchange of steam containing multi-component non-condensable gases, external condensation heat-exchange experiments of vertical single pipes and pipe bundles in various sizes and structural forms can be performed, thereby studying effect mechanisms of stem flow direction, non-condensable gas layers and other factors on condensation heat-exchange.
Description
Technical field
What the present invention relates to is a kind of condensing heat-exchange experimental provision, specifically a kind of steam-condensation local heat transfer device that contains the polycomponent fouling gas.
Background technology
Steam-condensation is as basic heat transfer form, can be from lower temperature be poor the very high coefficient of heat transfer of acquisition, thereby be widely used in all conglomeraties such as the energy, power, chemical industry.Strengthen the steam-condensation exchange capability of heat significant to improving exchanger heat efficient, yet the fouling gass such as air have strong inhibiting effect to condensation heat transfer, air such as massfraction in water vapour 1% just can make heat transfer coefficient reduce by 60%, so its quantitative examination is the study hotspot of thermal conduction study and association area in recent years always.In the desalinization field, aeriferous steam-condensation exchange capability of heat has determined the fresh water productive rate of dew point evaporation desalination plant to a certain extent at present, studies its reinforcement approach and has just indicated direction for reducing energy consumption, the technique that improves equipment etc.; And in nuclear power unit operation field, the heat of nuclear power station under accident conditions derived in the research that contains the steam-condensation heat exchange of fouling gas and the safe operation of condenser has very important significance.
At present for the steam-condensation heat exchange that contains fouling gas, experimental study is irreplaceable approach, but mainly concentrate on horizontal tube condensation and VERTICAL TUBE in-tube condensation aspect, less to the research of VERTICAL TUBE out-tubular condensing, especially under polycomponent fouling gas and enhanced tube condition.And experimental provision is to obtain the hardware facility that authentic data must lean on, and this just needs a kind of steam-condensation local heat transfer device that is applicable to the VERTICAL TUBE out-tubular condensing and contains the polycomponent fouling gas.In published condensation test device, number of patent application is disclosed " steam condenser comprehensive experimental unit " in 89201616.7 the patent document, can only carry out the teaching demonstration experiment of horizontal tube out-tubular condensing, also can't satisfy the accuracy requirement of scientific experiment; Number of patent application is disclosed " single tube in-tube evaporation and condensation integrated experimental provision " in 200820155479.6 the patent document, can only carry out condensation test in the single tube.They all can not carry out the experiment of VERTICAL TUBE out-tubular condensing on the structure, and pipeline is taked level or vertically arrange and steam in pipe or out-tubular condensing all can mix at gas, lime set is gathered etc. that the aspect there are differences, the condensation heat transfer characteristic is obvious difference also.The experimental provision of MITDehbi (Dehbi.The Effects of Non-condensable Gases on Steam Condensation underTurbulent Natural Convection Conditions, 1991.) although can carry out the experiment of VERTICAL TUBE out-tubular condensing, but have following defective: it is inner that (1) is located at the experiment body with vapour source, just need very large hydrospace sufficiently long stabilization time for leaving to DATA REASONING, cause the experiment body bulky, experimental site, cylinder strength and sealing are all had high requirements; If experiment body small volume, frequent moisturizing will make system pressure produce fluctuation, greatly shorten stabilization time, even can't stablize at all, can not satisfy the measuring accuracy requirement.(2) because can there be greater density difference in each component of mixed gas, opposite steam flow can produce distinct gas mixed effect, thereby condensation heat transfer is produced obviously impact, and this device can not change steam flow, can't study steam flow to the impact of condensation heat transfer.(3) nearly tube wall place fouling gas layer distributes and to analyzing fouling gas the inhibition mechanism of condensation heat transfer is had important value, the temperature of gas blanket inside, concentration parameter all are very important Data supports, but this device does not arrange any measurement mechanism to it, can not carry out the experimental study of this respect.(4) can't measure and the steam regulation flow, the heat exchange amount can only be measured by cooling water side, and its accuracy can not obtain the checking of steam side.
Summary of the invention
The steam-condensation local heat transfer device that contains the polycomponent fouling gas that the object of the present invention is to provide a kind of out-tubular condensing local heat transfer that can satisfy multiple vertical single tube and tube bank to require.
The object of the present invention is achieved like this:
Comprise steam supply system, air supply system, other gas supply system, the cooling water system condensation test body of unifying, the condensation test body comprises housing and is arranged at the interior experiment tube of housing, the top of housing and bottom arrange respectively enterprising tracheae and lower inlet duct, be separately installed with upper inlet valve and lower inlet valve on enterprising tracheae and the lower inlet duct, enterprising tracheae and Trunk Line and steam supply system after lower inlet duct is in parallel, air supply system links to each other with other gas supply system, housing bottom connects the lime set tank, after steam condenses in the condensation test body, solidifying water flows into the lime set tank downwards from housing bottom and discharges through draining valve, and the up and down two ends of experiment tube link to each other with cooling water system.
The present invention can also comprise:
1, described steam supply system comprises boiler, and the steam that is produced by boiler connects Trunk Line through steam pipeline, and steam-flow meter is set on the steam pipeline, and the two ends of steam-flow meter arrange stop valve.
2, described air supply system mainly is comprised of air compressor machine, gas-holder, oil-gas separator, and air compressor machine is inflated to gas-holder, and air enters Trunk Line through oil-gas separator, between oil-gas separator and the Trunk Line operation valve is set.
3, other gas supply system mainly is comprised of high-pressure gas cylinder and reduction valve, and gas is provided by high-pressure gas cylinder, enters Trunk Line through reduction valve.
4, cooling water system comprises pond, water pump, filtrator, cooling water flow meter, buffer tank, water pump is behind pool water-pumping, chilled water enters the experiment tube lower end through filtrator, cooling water flow meter, buffer tank successively, chilled water behind intraductal heat exchange is drawn through the exit variable valve from the experiment tube upper end and is returned the pond, and cooling water flow is controlled by variable valve.
5, described steam flow is counted two composition steam-flow meter groups arranged side by side, and the two ends of steam-flow meter group all are provided with drain by-pass straight down.
6, a discharge bypass straight up respectively is set on enterprising tracheae and the lower inlet duct, is respectively arranged with vent valve on each discharge bypass.
7, be provided with the gas composition measuring system on the condensation test body, described gas composition measuring system is comprised of stopple coupon, coiled pipe, condensation water tank, exsiccator, gas purity instrument, the mouth of pipe of described stopple coupon is distributed in along on the axial a plurality of cross sections of experiment tube, mixed gas is entered the coiled pipe that is immersed in condensation water tank by stopple coupon, steam condensation, the solidifying water device that is dried absorbs, and dry gas enters the gas purity instrument.
8, described coiled pipe is horizontal by certain angle.
The invention provides a kind of single-phase forced circulation of chilled water of utilizing, research contains the experimental provision of the steam-condensation heat transfer characteristic of polycomponent fouling gas, can carry out the vertical single tube of sizes, structural shape and the out-tubular condensing local heat transfer of tube bank, the factors such as steam flow, fouling gas layer of studying by experiment are on the mechanism that affects of condensing heat-exchange, thereby provide reliable technical support for the technical renovation of heat exchange element exploitation, optimal design and heat interchanger.
The characteristics of technical scheme of the present invention comprise:
The steam-condensation local heat transfer device that contains the polycomponent fouling gas of the present invention mainly is comprised of steam supply system, air supply system, other gas supply system, cooling water system, condensation test body, measuring system and data acquisition system (DAS).Steam supply system mainly is comprised of boiler and flowmeter, and steam is produced by boiler, and the steam-flow meter of flowing through enters Trunk Line.Air supply system mainly is comprised of air compressor machine, gas-holder, oil-gas separator, and air compressor machine is inflated to gas-holder, and air enters Trunk Line through oil-gas separator.Other gas supply system mainly is comprised of high-pressure gas cylinder and reduction valve, and gas is provided by high-pressure gas cylinder, enters Trunk Line through reduction valve.After each gas supply line convergeed to Trunk Line, Trunk Line was divided into again the two-way admission line, led to condensation test body shell-side upper and lower part through upper inlet valve, lower inlet valve respectively.After steam condensed in the condensation test body, solidifying water flowed into the lime set tank downwards from experiment body bottom, discharged finally by crossing draining valve.In the cooling water system, water pump is behind pool water-pumping, and chilled water enters experiment tube through filtrator, flowmeter, buffer tank successively, returns the pond at intraductal heat exchange by the exit variable valve, and flow is by the variable valve control in experiment tube exit.
The flowmeter group is all adopted in the flow measurement of steam and chilled water, and flowmeter quantity is determined according to the experiment needs in the flowmeter group, and range is connected from small to large mutually, covers required flow range.According to predetermined amount of flow, mate the flowmeter of different ranges, can guarantee the accuracy that steam and cooling water flow are measured.
All be provided with drain by-pass straight down at steam-flow meter group two ends, in the ponding that is produced by heat dissipation of pipeline before and after the delivery flow, prevent that two-phase fluid from disturbing flow measurement, and cause system pressure unstable.
The two-way admission line utilizes upper and lower gas admittance valve to change steam flow, so that more different steam flow is on the impact of condensing heat-exchange, and can promote gas uniform to mix, and effectively prevents stratification of hot gas.Admission line also respectively is provided with a discharge bypass straight up, changes gas composition with the vent valve exhaust.
Condensation test body below is equipped with the lime set tank, again evaporates to prevent solidifying water, affects experiment measuring.Its outer setting water-level gauge monitoring water level surpasses predetermined water level and just opens the solidifying water of draining valve discharge.Cavitation is damaged draining valve when preventing condensate draining, and solidifying water leakage contribution changes calorimetry and comparison, and inside and outside two draining valves are set herein.
Pressure-measuring system is comprised of the instrument of measuring following pressure everywhere: the vapor pressure at the gaseous tension of condensation test body, steam-flow meter place, chilled water are at the pressure at experiment tube outlet and buffer tank place.To measuring and the demanding measuring point of degree of regulation, a plurality of pressure units and tensimeter can be installed mutually compare, improve measurement accuracy and adjustability.
The gas composition measuring system is comprised of stopple coupon, coiled pipe, condensation water tank, exsiccator, gas purity instrument, and every kind of gas except steam, air all needs to be equipped with corresponding with it gas purity instrument.The stopple coupon mouth of pipe is distributed in along on the axial a plurality of cross sections of experiment tube, and gas enters the purity instrument along stopple coupon, gets each cross section mean value as a result of.To measuring the purity instrument of dry gas component, mixed gas is entered the coiled pipe that is immersed in condensation water tank by stopple coupon, and steam condensation, the solidifying water device that is dried absorbs, and dry gas enters the gas purity instrument.Coiled pipe is horizontal by certain angle, is conducive to hydrophobicly, prevents solidifying water slug pipeline, reduces measurement result accuracy.
Except tensimeter, lime set tank water-level gauge and gas purity instrument reading, all the other temperature, flow and pressure data are inputted PC by data acquisition system (DAS), the operation of adopting software that experimental data is gathered, calculates, shows, realization is to the Real-Time Monitoring of experiment condition, simultaneously can also deposit, process, print all data, use for the later stage further investigation.
According to said temperature, pressure, flow and waterlevel data, utilize data acquisition system (DAS), can calculate respectively heat exchange amount and Real-Time Monitoring from cooling water side, steam side and lime set side, by comparing the accuracy of three kinds of approach result of calculation validated measurement systems.
According to mixture pressure and main flow temperature, gas purity instrument registration, need not to measure emission flow and component, just can directly calculate in the experiment body and respectively form the gas accounting.Gas composition is calculated more fast and simple, and can the current mixing gas component of Real-Time Monitoring, improved the operability of experiment component control when carrying out.Computation process is as follows:
In the mixed gas, steam is depressed in its minute and is state of saturation, and the mixed gas steady temperature is exactly the vapo(u)rous temperature t
s, check in corresponding vapor partial pressure p
S (t)
According to Agmat partial volume law and the Dalton law of partial pressure, vapour volume mark
The purity instrument registration of certain gas is this composition gas volume fraction
The volume of air mark
The dividing potential drop of other gas
Certain forms the massfraction of gas
P: the mixed gas general pressure, measured by the manometer of condensation test body.
M
i: this forms the molal weight of gas, and steam is pressed 18g/mol, and air is pressed 29g/mol and calculated.
For the purity instrument that can only measure the dry gas component, the registration of purity instrument is after the dehumidifying
The dividing potential drop of other gas
The air dividing potential drop
Then certain forms gas volume fraction
The described steam-condensation local heat transfer device that contains the polycomponent fouling gas, there is energy conservation in the place at experiment tube, i.e. shell-side gas thermal discharge
Pipe side chilled water caloric receptivity
Q＝M
f(h
fo-h
fi)
Get condensation coefficient
A
o: experiment tube condensation segment external surface area, calculated by design size.
Condensation segment outside wall surface temperature is averaged by the thermocouple temperature measurement in each cross section of outside wall surface.
M
f: chilled water quality flow, by the cooling water flow flowmeter measurement.
h
Fi: the cooling water inlet enthalpy, being tabled look-up in buffer tank place pressure and temperature in by chilled water obtains.
h
Fo: the coolant outlet enthalpy, being tabled look-up by coolant outlet pressure, temperature obtains.
The invention has the beneficial effects as follows: utilize the single-phase forced circulation of chilled water, under the condition of polycomponent fouling gas, vertical single tube and tube bank being carried out the experimental study of steam pipe condensed exterior heat transfer characteristic, is the exploitation of condensing heat-exchange element, optimal design and the important experimental provision of heat exchanger technology innovation.This device can be realized: (1) carries out the vertical single tube of different size, structural shape and the out-tubular condensing heat transfer experiment of tube bank, and the partial condensation heat exchange situation of diverse location is studied; (2) change steam flow, more different steam flows are on the impact of condensing heat-exchange; (3) to the experimental data Real-Time Monitoring, according to Steady-state Parameters, continuous coverage is also monitored gas composition; (4) the actual condensation environment of simulation, relatively gas with various is on the impact of condensation heat transfer; (5) cooling water flow can accurately be regulated on a large scale, guarantees that temperature rise satisfies the experiment measuring requirement.
Description of drawings
Accompanying drawing is schematic flow sheet of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing:
Mainly formed by steam supply system, air supply system, other gas supply system, cooling water system, condensation test body 1, measuring system and data acquisition system (DAS).Steam supply system mainly is comprised of boiler 2 and flowmeter 3, and steam is produced by boiler 2, and the steam-flow meter 3 of flowing through enters Trunk Line.Air supply system mainly is comprised of air compressor machine 5, gas-holder 6, oil-gas separator 7, and air compressor machine 5 is to gas-holder 6 inflations, and air enters Trunk Line through oil-gas separator 7.Other gas supply system mainly is comprised of high-pressure gas cylinder 8 and reduction valve 9, and gas is provided by high-pressure gas cylinder 8, enters Trunk Line through reduction valve 9.After each gas supply line convergeed to Trunk Line, Trunk Line was divided into again the two-way admission line, led to condensation test body 1 shell-side upper and lower part through upper inlet valve 10, lower inlet valve 11 respectively.After steam condensed in condensation test body 1, solidifying water flowed into lime set tank 14 downwards from experiment body 1 bottom, discharged finally by crossing draining valve 15,16.In the cooling water system, after water pump 18 drew water from pond 17, chilled water entered experiment tube through filtrator 19, flowmeter 20, buffer tank 21 successively, returns pond 17 through exit variable valve 23 behind intraductal heat exchange, and flow is by variable valve 23 controls.
At steam-flow meter group 3 two ends, all be provided with drain by-pass straight down,, prevent that two-phase fluid from disturbing flow measurement, and cause system pressure unstable by the ponding that heat dissipation of pipeline produces in delivery flow 3 front and back.
The two-way admission line utilizes upper inlet valve 10 and lower inlet valve 11 to change steam flows, so that more different steam flow is on the impact of condensing heat-exchange, and can promote gas uniform to mix, and effectively prevents stratification of hot gas.Admission line also respectively is provided with a discharge bypass straight up, changes gas composition with vent valve 12,13 exhausts.
Condensation test body 1 below is equipped with lime set tank 14, prevents that the solidifying water that gathers from evaporating again, affects experiment measuring.Its outer setting water-level gauge monitoring water level surpasses predetermined water level and just opens draining valve 15, the solidifying water of 16 discharges.Cavitation is damaged draining valve when preventing condensate draining, and solidifying water leakage contribution changes calorimetry and comparison, and inside and outside two draining valves are set herein.
Temperature measurement system is comprised of the thermopair of measuring following temperature everywhere: steam is at the temperature at flowmeter 3 outlets and condensation test body 1 air intake opening place, the main flow of mixed gas and the gentle lime set tank 14 solidifying coolant-temperature gages of outer wall that nearly tube wall place temperature, cooling water outlet and inlet temperature, experiment tube 22 outside wall surface temperature enhanced tubes refer to parent tube.
Pressure-measuring system is comprised of the instrument of measuring following pressure everywhere: the vapor pressure at the gaseous tension of condensation test body 1, steam-flow meter 3 places, chilled water are at the pressure at experiment tube 22 outlets and buffer tank 21 places.To measuring and the demanding measuring point of degree of regulation, but setting pressure transmitter and tensimeter are compared raising measurement accuracy and adjustability mutually.
The gas composition measuring system is comprised of stopple coupon 24, coiled pipe 25, condensation water tank 26, exsiccator 27, gas purity instrument 28, and every kind of gas except steam, air all needs to be equipped with corresponding with it gas purity instrument 28.Stopple coupon 24 mouths of pipe are distributed in along on the axial a plurality of cross sections of experiment tube 22, and gas enters purity instrument 28 along stopple coupon 24, gets each cross section mean value as a result of.To measuring the purity instrument 28 of dry gas component, mixed gas is entered the coiled pipe 25 that is immersed in condensation water tank 26 by stopple coupon 24, and be dried device 27 of steam condensation, solidifying water absorbs, and dry gas enters gas purity instrument 28.Coiled pipe 25 is horizontal by certain angle, is conducive to hydrophobicly, prevents solidifying water slug pipeline, reduces measurement result accuracy.
Except the reading of tensimeter, lime set tank 14 water-level gauges and gas purity instrument 28, all the other temperature, flow and pressure data are inputted PC by data acquisition system (DAS), adopt the software of special establishment to gather, calculate, show, realization is to the Real-Time Monitoring of experiment condition, simultaneously can also deposit, process, print all data, use for the later stage further investigation.
According to said temperature, pressure, flow and waterlevel data, can calculate respectively heat exchange amount and Real-Time Monitoring from cooling water side, steam side and lime set side, by comparing the result of calculation validated measurement systems accuracy of three kinds of approach.
According to mixture pressure and main flow temperature, gas purity instrument 28 registrations, just can directly calculate the accounting that forms gas, gas composition is calculated easier, and can the current mixing gas component of Real-Time Monitoring, the operability of component control in the experiment improved.
Be used for pure steam-condensation local heat transfer, its technical scheme 1 is: cooling water side, starting water pump 18 17 draws water from the pond, chilled water is successively through entering experiment tube 22 behind filtrator 19, flowmeter 20, the buffer tank 21, behind intraductal heat exchange, return pond 17 through exit variable valve 23, flow is regulated by variable valve 23.Steam side starts boiler 2, treats that its pressure is elevated to about 0.03MPa, open steam valve, upper inlet valve 10 and draining valve 15,16, steam enters condensation test body 1 and lime set tank 14 through flowmeter 3, discharges at last, gradually the air in emptying condensation test body 1 and the lime set tank 14.After half an hour, close draining valve 15,16, boiler pressure and cooling water flow are elevated to predetermined value, steam is after experiment tube 22 condensation segment surface condensations, and solidifying water flows into lime set tank 14.After solidifying water water level surpassed predetermined water level, first standard-sized sheet internal drainage valve 15 was opened outer draining valve 16 beginning drainings again; After water level dropped to low-water level, valve 16 outside the Pass the elder generation closed internal valve 15 again, and protection internal valve 15 is avoided cavitation.
Be used for containing the steam-condensation local heat transfer of air, its technical scheme 2 is: for preventing stratification of hot gas, pass into air by the upper air pipeline to condensation test body 1 first, pass into steam by the lower inlet duct line again.Cooling water circulation is with technical scheme 1.Air side starts air compressor machine 5 and boosts to gas-holder 6 inflations, closes air compressor machine 5 behind the arrival certain pressure.After opening air valve, air enters condensation test body 1 through oil-gas separator 7 and upper inlet valve 10, closes air valve and upper inlet valve 10 after reaching predetermined pressure.Steam side starts boiler 2, treats that its pressure is elevated to predetermined value, opens successively lower inlet valve 11 and steam valve, and steam enters condensation test body 1 through flowmeter 3, and after the condensation segment outside wall surface was condensed, solidifying water flowed into lime set tank 14, and the solidifying water of discharging is with technical scheme 1.
This device changes gas composition by the mode of exhaust.Open vent valve 12 exhausts, when gas temperature is about to be elevated to next operating mode predetermined temperature, close and close vent valve 12.Behind gaseous tension to be mixed, the temperature stabilization, judge whether to reach requirement of experiment according to the systematic steady state parameter.
Be used for containing the steam-condensation local heat transfer of air, helium, its technical scheme 3 is: for preventing stratification of hot gas, pass into air by the upper air pipeline to condensation test body 1 first, pass into successively helium and steam by the lower inlet duct line again.Cooling water circulation is with technical scheme 1, and air side is moved with technical scheme 2.The helium side is opened lower inlet valve 11, regulates reduction valve 9, and helium directly enters condensation test body 1 from high-pressure gas cylinder 8, closes reduction valve 9 after reaching predetermined pressure.Steam side operation and exhaust change component with technical scheme 2.
In the helium survey system, open the valve of arbitrary cross-sectional sampling pipe 24, mixed gas enters the coiled pipe 25 that is immersed in the condensation water tank 26 along stopple coupon 24, steam condensation, solidifying water enters exsiccator 27 and is absorbed, dry gas enters helium purity instrument 28 and measures, and mean value is as a result of as a result to get each section gauge.
Claims (9)
1. the steam-condensation local heat transfer device that contains the polycomponent fouling gas, comprise steam supply system, air supply system, other gas supply system, the cooling water system condensation test body of unifying, it is characterized in that: the condensation test body comprises housing and is arranged at the interior experiment tube of housing, the top of housing and bottom arrange respectively enterprising tracheae and lower inlet duct, be separately installed with upper inlet valve and lower inlet valve on enterprising tracheae and the lower inlet duct, enterprising tracheae and Trunk Line and steam supply system after lower inlet duct is in parallel, air supply system links to each other with other gas supply system, housing bottom connects the lime set tank, after steam condenses in the condensation test body, solidifying water flows into the lime set tank downwards from housing bottom and discharges through draining valve, and the up and down two ends of experiment tube link to each other with cooling water system.
2. the steam-condensation local heat transfer device that contains the polycomponent fouling gas according to claim 1, it is characterized in that: described steam supply system comprises boiler, the steam that is produced by boiler connects Trunk Line through steam pipeline, steam-flow meter is set on the steam pipeline, and the two ends of steam-flow meter arrange stop valve.
3. the steam-condensation local heat transfer device that contains the polycomponent fouling gas according to claim 2, it is characterized in that: described air supply system mainly is comprised of air compressor machine, gas-holder, oil-gas separator, air compressor machine is inflated to gas-holder, air enters Trunk Line through oil-gas separator, between oil-gas separator and the Trunk Line operation valve is set.
4. the steam-condensation local heat transfer device that contains the polycomponent fouling gas according to claim 3, it is characterized in that: other gas supply system mainly is comprised of high-pressure gas cylinder and reduction valve, gas is provided by high-pressure gas cylinder, enters Trunk Line through reduction valve.
5. the steam-condensation local heat transfer device that contains the polycomponent fouling gas according to claim 4, it is characterized in that: cooling water system comprises pond, water pump, filtrator, cooling water flow meter, buffer tank, water pump is behind pool water-pumping, chilled water enters the experiment tube lower end through filtrator, cooling water flow meter, buffer tank successively, chilled water behind intraductal heat exchange is drawn through the exit variable valve from the experiment tube upper end and is returned the pond, and cooling water flow is controlled by variable valve.
6. the steam-condensation local heat transfer device that contains the polycomponent fouling gas according to claim 5, it is characterized in that: described steam flow is counted two composition steam-flow meter groups arranged side by side, and the two ends of steam-flow meter group all are provided with drain by-pass straight down.
7. the steam-condensation local heat transfer device that contains the polycomponent fouling gas according to claim 6 is characterized in that: a discharge bypass straight up respectively is set on enterprising tracheae and the lower inlet duct, is respectively arranged with vent valve on each discharge bypass.
8. the steam-condensation local heat transfer device that contains the polycomponent fouling gas according to claim 7, it is characterized in that: be provided with the gas composition measuring system on the condensation test body, described gas composition measuring system is comprised of stopple coupon, coiled pipe, condensation water tank, exsiccator, gas purity instrument, the mouth of pipe of described stopple coupon is distributed in along on the axial a plurality of cross sections of experiment tube, mixed gas is entered the coiled pipe that is immersed in condensation water tank by stopple coupon, steam condensation, the solidifying water device that is dried absorbs, and dry gas enters the gas purity instrument.
9. the steam-condensation local heat transfer device that contains the polycomponent fouling gas according to claim 8, it is characterized in that: described coiled pipe is horizontal by certain angle.
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