CN104748996A - Stimulation test apparatus and method of dynamic response of power plant exhaust waste heat utilization system - Google Patents
Stimulation test apparatus and method of dynamic response of power plant exhaust waste heat utilization system Download PDFInfo
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- 238000012360 testing method Methods 0.000 title claims abstract description 183
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000004044 response Effects 0.000 title claims abstract description 16
- 239000002918 waste heat Substances 0.000 title abstract 3
- 230000000638 stimulation Effects 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 130
- 239000003546 flue gas Substances 0.000 claims abstract description 83
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 82
- 238000004088 simulation Methods 0.000 claims abstract description 76
- 238000005259 measurement Methods 0.000 claims description 22
- 230000001105 regulatory effect Effects 0.000 claims description 17
- 238000005485 electric heating Methods 0.000 claims description 15
- 238000012986 modification Methods 0.000 claims description 15
- 230000004048 modification Effects 0.000 claims description 15
- 238000013461 design Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 13
- 238000002474 experimental method Methods 0.000 claims description 12
- 239000000779 smoke Substances 0.000 claims description 11
- 230000008676 import Effects 0.000 claims description 10
- 238000009841 combustion method Methods 0.000 claims description 6
- 230000007246 mechanism Effects 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 239000003517 fume Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 3
- 230000005619 thermoelectricity Effects 0.000 description 3
- 239000008236 heating water Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
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Abstract
The invention discloses a stimulation test apparatus and method of dynamic response of a power plant exhaust waste heat utilization system. The apparatus comprises a centrifugal fan, a test segment, a simulation part and a measuring device. The test segment comprises a flue gas heat exchanger simulation test segment and an air preheating test segment. The centrifugal fan is disposed at an air inlet. An air outlet of the centrifugal fan is divided into two paths by a pipeline; one path is provided with the flue gas heat exchanger simulation test segment; the other path is provided with the air preheating test segment. The air preheating test segment is connected with the flue gas heat exchanger simulation test segment through the pipeline. The simulation part is provided outside the pipeline and comprises an expansion water tank and a constant temperature water bath; water incoming and outgoing pipes of the constant temperature water bath are connected with water incoming and outgoing pipes of the flue gas heat exchanger simulation test segment and the air preheating test segment to be measured, respectively, forming a circulating water closed loop; a constant temperature water tank circulating pump is disposed on the constant temperature water bath. The apparatus is suitable for testing the dynamic response of the power plant exhaust waste heat utilization system under different influence factors; the method is simple.
Description
Technical field
The present invention relates to a kind of power plant smoke discharging residual heat and utilize system Dynamic Response Simulation experimental apparatus for testing and method.
Background technology
The general layout that the energy structure of China determines based on coal fired power generation does not have large change within a very long time.In recent years, China's electric power installed capacity speedup is swift and violent, by the end of the year 2013, whole nation electric power installation total volume has reached 12.47 hundred million kilowatts, and be only second to the U.S., wherein thermoelectricity is 8.62 hundred million kilowatts, account for 69% of national total installation of generating capacity, and estimate will reach 9.33 hundred million kilowatts China's thermoelectricity installed capacity in 2015, thermoelectricity generated energy accounts for more than 80% of gross generation, year consumes fire coal and can reach more than 2,000,000,000 tons." energy-saving and emission-reduction " of Large-scale fire-electricity unit are the important energy source policies of country always, and each power plant is faced with energy-conservation great potential.
In every loss of boiler, flue gas loss is maximum one, reduces exhaust gas temperature and has important practical significance for energy-saving and emission-reduction.Current exhaust gas temperature is generally 120-140 DEG C, and exhaust gas temperature often reduces by 10 ~ 20 DEG C, and boiler thermal output improves about 0.6% ~ 1%, the corresponding coal 1.2% ~ 2.4% of consumption less.Boiler tail smoke discharging residual heat belongs to low-grade heat source, has the features such as exhaust gas volumn is large, energy density is low, recovery is difficult; But its Exploitative potential is huge, if can make full use of, not only can saves mass energy, bring considerable economic results in society, solve energy shortage problem, significantly can also reduce environmental pollution.Research at present about smoke discharging residual heat utilization is a lot, can introduce steam heat regenerative system as backheat heat, for adding Hot gas turbine condensate water, or by heating air preheater import cold air to introduce boiler, all have certain energy-saving effect.
At present, although the theoretical research " utilizing smoke discharging residual heat to heat air preheater import cold air to introduce boiler energy-saving system " is very abundant, practical engineering experience is still not enough, and especially power plant's site environment is complicated, a lot of position is not suitable for installing measuring point, and measurement is installed restricted; Some measurement mechanism aged deterioration, causes measurement result inaccurate; Only according to design conditions certainty annuity place capacity, do not analyze variable working condition and limiting condition, for the variable element in actual motion, the dynamic response of system does not instruct code; Adopt process modeling software to carry out simulation calculation, the result obtained has limitation.
Summary of the invention
The present invention, in order to solve the problem, propose a kind of power plant smoke discharging residual heat and utilizes system Dynamic Response Simulation experimental apparatus for testing and method, and this device, on the basis meeting power plant's each equipment flow field similarity principle, simplifies system, ensures measurement accuracy; According to flowing, the heat transfer characteristic of power plant system actual condition analog machine, emulation testing is carried out to system, the dynamic response characteristic of system under observation different affecting factors.
To achieve these goals, the present invention adopts following technical scheme:
A kind of power plant smoke discharging residual heat utilizes system Dynamic Response Simulation experimental apparatus for testing, comprises centrifugal blower, test section, simulation component and measurement mechanism, wherein:
Described test section comprises electrical heating test section, flue gas heat-exchange unit simulation test section, air temperature modification test section and preheating of air test section;
Centrifugal blower is arranged at air inlet, and the air outlet of centrifugal blower is divided into two-way by pipeline, utilizes flashboard controlled wind speed respectively, to meet the throughput ratio of fume side and air side; Air is first through electrical heating test section on the way, with dry combustion method air electric heating tube by after air heat, enters flue gas heat-exchange unit simulation test section, carries out heat exchange;
On another road, air is first through air temperature modification test section, after air heat or cooling, enter preheating of air test section, carry out heat exchange, together with the air that preheating of air test section is discharged and the flue gas heat-exchange unit simulation test section air of discharging outside discharge chamber, respectively at rectangular duct import and export design temperature and the wind speed measuring point of flue gas heat-exchange unit simulation test section, electrical heating test section, preheating of air test section and air temperature modification test section;
Pipeline is outside equipped with simulation component, simulation component comprises water bath with thermostatic control, expansion tank, the inlet tube and outlet tube of water bath with thermostatic control is connected with the inlet tube and outlet tube of the heat-exchanging tube bundle of air temperature modification test section respectively, forms recirculated water closed-loop, air preheater entering air temperature is regulated; Preheating of air test section and flue gas heat-exchange unit simulation test section, by the mode connecting water pipe of bottom in and top out, form closed cycle loop, and arrange expansion tank in water circulating pump porch, carry out water-supply and pressure-stabling;
Together with the air that the air of preheating of air test section discharge and flue gas heat-exchange unit simulation test section are discharged outside discharge chamber, the parameter of measurement mechanism measurement test section, and be transferred to data acquisition unit.
Described flue gas heat-exchange unit simulation test section adopts H type finned tube or spiral fin coil tube bank along row or stagger arrangement arrangement, preheating of air test section adopts spiral fin coil tube bank along row or stagger arrangement arrangement, pipe Inner eycle water flow, two test sections all adopt the mode of bottom in and top out to carry out connecting water pipe, recirculated water rises at flue gas heat-exchange unit simulation test section endothermic temperature, decline at preheating of air test section exothermic temperature, form closed cycle loop, change flow by ebullator and carry out variable-flow working condition tests, and open type high expansion water box is set carries out level pressure, pipeline section place design temperature measuring point is imported and exported respectively in the header of water up and down of flue gas heat-exchange unit simulation test section and preheating of air test section, obtain the out temperature of water side each point.
Described air temperature modification test section adopts rectangle elliptical fin tube bank arrangement, the water of water bath with thermostatic control is as at Bottomhole pressure, inlet air temp before preheating of air test section is regulated by the water temperature of regulating thermostatic water-bath, and import and export pipeline section place design temperature measuring point in the header of water up and down of test section, obtain the out temperature of water side.
Described electrical heating test section adopts dry combustion method air electric heating tube to heat air, adopts high temperature air simulated flue gas, in order to ensure the constant of heated air temperature, and additional temperature regulating device; Adopt the temperature-controlling system of intelligent PID temperature controller and SSR solid-state relay, temperature controller, by being arranged on the thermopair measuring point Real-Time Monitoring flue temperature in flue, controls adhesive and the disconnection of solid-state relay on this basis, finally reaches experiment temperature required.
Based on an emulation testing experimental technique for said apparatus, specifically comprise the following steps:
(1) preheating of air test section intake air temperature working condition experimenting is carried out;
(2) change inlet flue gas temperature, carry out flue gas heat-exchange unit simulation test section variable work condition test;
(3) circulating water flow is controlled, carry out recirculated water variable work condition test.
In described step (1), concrete grammar comprises the following steps:
1. water bath with thermostatic control water-filling, and be heated to design temperature;
2. water pump is opened, slow running, until the intrafascicular air of developmental tube is emptying, high-speed cruising water pump, until stable conditions, namely to import and export pipeline section thermometric identical in water side;
3. open blower fan, adjust the gate valve in two air channels respectively, and measure the wind speed in two air channels with microbarograph, until the throughput ratio of preheating of air test section and flue gas heat-exchange unit simulation test section is setting value;
4. connect electric heating tube, the temperature of setting simulated flue gas heats flue gas heat-exchange unit simulation test section;
5., after stable conditions, read number and adopt the water side of instrument and the out temperature of air side, read the reading of ebullator water meter and spinner-type flowmeter, and adopt " nine grids " method, obtain with pitot tube and microbarograph measurement the mean wind speed obtaining xsect;
6. the water temperature of regulating thermostatic water-bath, under repetition above-mentioned steps obtains different preheating of air test section entering air temperature, the out temperature of water side and air side, the mean wind speed of water effluent speed and xsect.
Described step 5. in, stable conditions refer to run more than 30min.
In described step (2), the experimental technique becoming inlet flue gas temperature comprises:
A. open blower fan, adjust the gate valve in two air channels respectively, and measure the wind speed in two air channels with microbarograph, until the throughput ratio of preheating of air test section and flue gas heat-exchange unit simulation test section is setting value;
B. connect electric heating tube, change the temperature of setting simulated flue gas, flue gas heat-exchange unit simulation test section is heated;
C., after stable conditions, read number and adopt the water side of instrument and the out temperature of air side, read the reading of ebullator water meter and spinner-type flowmeter, and adopt " nine grids " method, obtain with pitot tube and microbarograph measurement the mean wind speed obtaining xsect;
D. with 5 DEG C for interval, set different simulated flue gas temperature respectively, flue gas heat-exchange unit simulation test section is heated, under repetition above-mentioned steps obtains different flue gas heat-exchange unit simulation test section entrance " flue gas " temperature, the out temperature of water side and air side, the mean wind speed of water effluent speed and xsect.
The concrete steps of described step (3) recirculated water variable work condition test comprise:
(3-1) open blower fan, adjust the gate valve in two air channels respectively, and measure the wind speed in two air channels with microbarograph, until the throughput ratio of preheating of air test section and flue gas heat-exchange unit simulation test section is setting value;
(3-2) connect electric heating tube, the temperature of setting simulated flue gas heats flue gas heat-exchange unit simulation test section;
(3-3) regulate the latter linked valve of water circulating pump, circulating water flow is controlled, reach 50% of setting flow;
(3-4) after stable conditions, read number and adopt the water side of instrument and the out temperature of air side, read the reading of ebullator water meter and spinner-type flowmeter, and adopt " nine grids " method, obtain with pitot tube and microbarograph measurement the mean wind speed obtaining xsect;
(3-5) the latter linked valve of water circulating pump is regulated, circulating water flow is controlled, from 50% to 100% change, under repetition above-mentioned steps obtains different circulating water flow, the out temperature of water side and air side, the mean wind speed of water effluent speed and xsect.
Described step (3-4) described stable conditions refers to and runs more than 30min.
Beneficial effect of the present invention is:
(1) simulate flowing, the heat transfer characteristic of each equipment according to power plant system actual condition, system is emulated;
(2) on the basis meeting each principle of similarity, the test of system dynamic response is simplified;
(3) preheating of air test section intake air temperature working condition experimenting can be carried out at this experiment table, flue gas heat-exchange unit simulation test section becomes inlet flue gas temperature working condition experimenting, recirculated water variable work condition test;
(4) for power plant's Practical Project design, run provide reliable test figure basis, and variable working condition prediction change curve.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Wherein, A-air inlet; B-blower fan; C-electrical heating test section; D-flue gas heat-exchange unit simulation test section; E-air temperature modification test section; F-preheating of air test section; G-water circulating pump; The high-order open axial flow fan of H-; J-can set temperature and record the heat time electrical heating water bath with thermostatic control; K-constant temperature water tank ebullator; L-controllable register valve; 1-12-electric thermo-couple temperature measuring point.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As shown in Figure 1, the device in this test platform comprise centrifugal blower B, air channel regulating gate, electrical heating test section C, flue gas heat-exchange unit simulation test section D, air temperature modification test section E, preheating of air test section F, water circulating pump G, high-order open axial flow fan H, can set temperature and record the heat time electrical heating water bath with thermostatic control J, the supporting ebullator K of water bath with thermostatic control; Measurement mechanism comprises pitot tube, electronic micro-manometer, air channel measuring point temperature sensor, recirculated water measuring tempeature sensor, spinner-type flowmeter.
Dynamic response test under different affecting factors:
This platform can measure the dynamic response test of system under flue gas heat-exchange unit simulation test section D heat-exchanging tube bundle, preheating of air test section F heat-exchanging tube bundle different affecting factors, during measurement, two-way air is drawn by total air channel of fan outlet, use flashboard controlled wind speed respectively, to meet the throughput ratio of fume side and air side; Wherein a road air is first through electrical heating test section C, with dry combustion method air electric heating tube by after air heat, enters flue gas heat-exchange unit simulation test section D, carries out heat exchange; Another road air is first through air temperature modification test section E, after air heat or cooling, enter preheating of air test section F, carry out heat exchange, together with the air that the air that preheating of air test section F discharges and flue gas heat-exchange unit simulation test section D discharge outside discharge chamber, respectively at rectangular duct import and export design temperature and the wind speed measuring point of flue gas heat-exchange unit simulation test section D, electrical heating test section C, preheating of air test section F and air temperature modification test section E, " nine grids " method of employing, obtains mean wind speed and the temperature of each xsect in air channel.
Wherein, flue gas heat-exchange unit simulation test section D adopts H type finned tube or spiral fin coil tube bank along row or stagger arrangement arrangement, preheating of air test section F adopts spiral fin coil tube bank along row or stagger arrangement arrangement, pipe Inner eycle water flow, two test sections all adopt the mode of bottom in and top out to carry out connecting water pipe, recirculated water rises at flue gas heat-exchange unit simulation test section D endothermic temperature, decline at preheating of air test section F exothermic temperature, form closed cycle loop, change flow by ebullator and carry out variable-flow working condition tests, and open type high expansion water box is set carries out level pressure, pipeline section place design temperature measuring point is imported and exported respectively in the header of water up and down of flue gas heat-exchange unit simulation test section D and preheating of air test section F, obtain the out temperature of water side each point.
Electrical heating test section C adopts dry combustion method air electric heating tube to heat air, adopts high temperature air simulated flue gas, in order to ensure the constant of heated air temperature, and additional temperature regulating device; Adopt the temperature-controlling system of intelligent PID temperature controller and SSR solid-state relay, temperature controller, by being arranged on the thermopair measuring point Real-Time Monitoring flue temperature in flue, controls adhesive and the disconnection of solid-state relay on this basis, finally reaches experiment temperature required.
Air temperature modification test section E adopts original rectangle elliptical fin to restrain arrangement, the water of water bath with thermostatic control is as at Bottomhole pressure, the inlet air temp before preheating of air test section F is regulated by the water temperature of regulating thermostatic water-bath, and import and export pipeline section place design temperature measuring point in the header of water up and down of test section, obtain the out temperature of water side.
In actual measurement, measure in accordance with the following steps:
1) preheating of air test section F intake air temperature operating mode
1. water bath with thermostatic control water-filling, and be heated to design temperature;
2. open water pump, slow running, until the intrafascicular air of developmental tube is emptying, high-speed cruising water pump, until stable conditions (it is identical that pipeline section thermometric is imported and exported in water side);
3. open blower fan, adjust the gate valve in two air channels respectively, and measure the wind speed in two air channels with microbarograph, until the throughput ratio of preheating of air test section F and flue gas heat-exchange unit simulation test section D is 1.52:1;
4. connect electric heating tube, the temperature of setting simulated flue gas heats flue gas heat-exchange unit simulation test section D;
5. after stable conditions (30min), read number and adopt the water side of instrument and the out temperature of air side, read the reading of ebullator water meter and spinner-type flowmeter, and adopt " nine grids " method, obtain with pitot tube and microbarograph measurement the mean wind speed obtaining xsect;
6. the water temperature of regulating thermostatic water-bath, under repetition above-mentioned steps obtains different preheating of air test section F entering air temperature, the out temperature of water side and air side, the mean wind speed of water effluent speed and xsect.
2) flue gas heat-exchange unit simulation test section D variable working condition
1. open blower fan, adjust the gate valve in two air channels respectively, and measure the wind speed in two air channels with microbarograph, until the throughput ratio of preheating of air test section F and flue gas heat-exchange unit simulation test section D is 1.52:1;
2. connect electric heating tube, change the temperature of setting simulated flue gas, flue gas heat-exchange unit simulation test section D is heated;
3. after stable conditions (30min), read number and adopt the water side of instrument and the out temperature of air side, read the reading of ebullator water meter and spinner-type flowmeter, and adopt " nine grids " method, obtain with pitot tube and microbarograph measurement the mean wind speed obtaining xsect;
4. with 5 DEG C for interval, set different simulated flue gas temperature respectively, flue gas heat-exchange unit simulation test section is heated, under repetition above-mentioned steps obtains different flue gas heat-exchange unit simulation test section D entrance " flue gas " temperature, the out temperature of water side and air side, the mean wind speed of water effluent speed and xsect.
3) recirculated water variable working condition
1. open blower fan, adjust the gate valve in two air channels respectively, and measure the wind speed in two air channels with microbarograph, until the throughput ratio of preheating of air test section F and flue gas heat-exchange unit simulation test section D is 1.52:1;
2. connect electric heating tube, the temperature of setting simulated flue gas heats flue gas heat-exchange unit simulation test section D;
3. regulate the latter linked valve of water circulating pump G, circulating water flow is controlled, reach 50% of setting flow;
4. after stable conditions (30min), read number and adopt the water side of instrument and the out temperature of air side, read the reading of ebullator water meter and spinner-type flowmeter, and adopt " nine grids " method, obtain with pitot tube and microbarograph measurement the mean wind speed obtaining xsect;
5. regulate the latter linked valve of water circulating pump G, circulating water flow is controlled, from 50% to 100% change, under repetition above-mentioned steps obtains different circulating water flow, the out temperature of water side and air side, the mean wind speed of water effluent speed and xsect.
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (9)
1. power plant's smoke discharging residual heat utilizes a system Dynamic Response Simulation experimental apparatus for testing, it is characterized in that: comprise centrifugal blower, test section, simulation component and measurement mechanism, wherein:
Described test section comprises electrical heating test section, flue gas heat-exchange unit simulation test section, air temperature modification test section and preheating of air test section;
Centrifugal blower is arranged at air inlet, and the air outlet of centrifugal blower is divided into two-way by pipeline, utilizes flashboard controlled wind speed respectively, to meet the throughput ratio of fume side and air side; Air is first through electrical heating test section on the way, with dry combustion method air electric heating tube by after air heat, enters flue gas heat-exchange unit simulation test section, carries out heat exchange;
On another road, air is first through air temperature modification test section, after air heat or cooling, enter preheating of air test section, carry out heat exchange, together with the air that preheating of air test section is discharged and the flue gas heat-exchange unit simulation test section air of discharging outside discharge chamber, respectively at rectangular duct import and export design temperature and the wind speed measuring point of flue gas heat-exchange unit simulation test section, electrical heating test section, preheating of air test section and air temperature modification test section;
Pipeline is outside equipped with simulation component, simulation component comprises water bath with thermostatic control, expansion tank, the inlet tube and outlet tube of water bath with thermostatic control is connected with the inlet tube and outlet tube of the heat-exchanging tube bundle of air temperature modification test section respectively, forms recirculated water closed-loop, air preheater entering air temperature is regulated; Preheating of air test section and flue gas heat-exchange unit simulation test section, by the mode connecting water pipe of bottom in and top out, form closed cycle loop, and arrange expansion tank in water circulating pump porch, carry out water-supply and pressure-stabling;
Together with the air that the air of preheating of air test section discharge and flue gas heat-exchange unit simulation test section are discharged outside discharge chamber, the parameter of measurement mechanism measurement test section, and be transferred to data acquisition unit.
2. a kind of power plant as claimed in claim 1 smoke discharging residual heat utilizes system Dynamic Response Simulation experimental apparatus for testing, it is characterized in that: described flue gas heat-exchange unit simulation test section adopts H type finned tube or spiral fin coil tube bank along row or stagger arrangement arrangement, preheating of air test section adopts spiral fin coil tube bank along row or stagger arrangement arrangement, pipe Inner eycle water flow, two test sections all adopt the mode of bottom in and top out to carry out connecting water pipe, recirculated water rises at flue gas heat-exchange unit simulation test section endothermic temperature, decline at preheating of air test section exothermic temperature, form closed cycle loop, change flow by ebullator and carry out variable-flow working condition tests, and open type high expansion water box is set carries out level pressure, pipeline section place design temperature measuring point is imported and exported respectively in the header of water up and down of flue gas heat-exchange unit simulation test section and preheating of air test section, obtain the out temperature of water side each point.
3. a kind of power plant as claimed in claim 1 smoke discharging residual heat utilizes system Dynamic Response Simulation experimental apparatus for testing, it is characterized in that: described air temperature modification test section adopts rectangle elliptical fin tube bank arrangement, the water of water bath with thermostatic control is as at Bottomhole pressure, the inlet air temp before preheating of air test section is regulated by the water temperature of regulating thermostatic water-bath, and import and export pipeline section place design temperature measuring point in the header of water up and down of test section, obtain the out temperature of water side.
4. a kind of power plant as claimed in claim 1 smoke discharging residual heat utilizes system Dynamic Response Simulation experimental apparatus for testing, it is characterized in that: described electrical heating test section adopts dry combustion method air electric heating tube to heat air, adopt high temperature air simulated flue gas, in order to ensure the constant of heated air temperature, additional temperature regulating device; Adopt the temperature-controlling system of intelligent PID temperature controller and SSR solid-state relay, temperature controller, by being arranged on the thermopair measuring point Real-Time Monitoring flue temperature in flue, controls adhesive and the disconnection of solid-state relay on this basis, finally reaches experiment temperature required.
5., based on an emulation testing experimental technique for the device such as according to any one of claim 1-4, it is characterized in that: specifically comprise the following steps:
(1) preheating of air test section intake air temperature working condition experimenting is carried out;
(2) change inlet flue gas temperature, carry out flue gas heat-exchange unit simulation test section variable work condition test;
(3) circulating water flow is controlled, carry out recirculated water variable work condition test.
6. emulation testing experimental technique as claimed in claim 5, is characterized in that: in described step (1), concrete grammar comprises the following steps:
1. water bath with thermostatic control water-filling, and be heated to design temperature;
2. water pump is opened, slow running, until the intrafascicular air of developmental tube is emptying, high-speed cruising water pump, until stable conditions, namely to import and export pipeline section thermometric identical in water side;
3. open blower fan, adjust the gate valve in two air channels respectively, and measure the wind speed in two air channels with microbarograph, until the throughput ratio of preheating of air test section and flue gas heat-exchange unit simulation test section is setting value;
4. connect electric heating tube, the temperature of setting simulated flue gas heats flue gas heat-exchange unit simulation test section;
5., after stable conditions, read number and adopt the water side of instrument and the out temperature of air side, read the reading of ebullator water meter and spinner-type flowmeter, and adopt " nine grids " method, obtain with pitot tube and microbarograph measurement the mean wind speed obtaining xsect;
6. the water temperature of regulating thermostatic water-bath, under repetition above-mentioned steps obtains different preheating of air test section entering air temperature, the out temperature of water side and air side, the mean wind speed of water effluent speed and xsect.
7. emulation testing experimental technique as claimed in claim 5, is characterized in that: in described step (2), and the experimental technique becoming flue gas flow comprises:
A. open blower fan, adjust the gate valve in two air channels respectively, and measure the wind speed in two air channels with microbarograph, until the throughput ratio of preheating of air test section and flue gas heat-exchange unit simulation test section is setting value;
B. connect electric heating tube, change the temperature of setting simulated flue gas, flue gas heat-exchange unit simulation test section is heated;
C., after stable conditions, read number and adopt the water side of instrument and the out temperature of air side, read the reading of ebullator water meter and spinner-type flowmeter, and adopt " nine grids " method, obtain with pitot tube and microbarograph measurement the mean wind speed obtaining xsect;
D. with 5 DEG C for interval, set different simulated flue gas temperature respectively, flue gas heat-exchange unit simulation test section is heated, under repetition above-mentioned steps obtains different flue gas heat-exchange unit simulation test section entrance " flue gas " temperature, the out temperature of water side and air side, the mean wind speed of water effluent speed and xsect.
8. emulation testing experimental technique as claimed in claim 5, is characterized in that: the concrete steps of described step (3) comprising:
(3-1) open blower fan, adjust the gate valve in two air channels respectively, and measure the wind speed in two air channels with microbarograph, until the throughput ratio of preheating of air test section and flue gas heat-exchange unit simulation test section is setting value;
(3-2) connect electric heating tube, the temperature of setting simulated flue gas heats flue gas heat-exchange unit simulation test section;
(3-3) regulate the latter linked valve of water circulating pump, circulating water flow is controlled, reach 50% of setting flow;
(3-4) after stable conditions, read number and adopt the water side of instrument and the out temperature of air side, read the reading of ebullator water meter and spinner-type flowmeter, and adopt " nine grids " method, obtain with pitot tube and microbarograph measurement the mean wind speed obtaining xsect;
(3-5) the latter linked valve of water circulating pump is regulated, circulating water flow is controlled, from 50% to 100% change, under repetition above-mentioned steps obtains different circulating water flow, the out temperature of water side and air side, the mean wind speed of water effluent speed and xsect.
9. emulation testing experimental technique as claimed in claim 8, is characterized in that: described step (3-4) described stable conditions refers to and runs more than 30min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510181876.5A CN104748996B (en) | 2015-04-16 | 2015-04-16 | Power plant's smoke discharging residual heat utilizes system Dynamic Response Simulation experimental apparatus for testing and method |
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| CN201510181876.5A CN104748996B (en) | 2015-04-16 | 2015-04-16 | Power plant's smoke discharging residual heat utilizes system Dynamic Response Simulation experimental apparatus for testing and method |
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