CN204495576U - The simulation testing device of system reliability control characteristic is utilized for smoke discharging residual heat - Google Patents
The simulation testing device of system reliability control characteristic is utilized for smoke discharging residual heat Download PDFInfo
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- CN204495576U CN204495576U CN201520230279.2U CN201520230279U CN204495576U CN 204495576 U CN204495576 U CN 204495576U CN 201520230279 U CN201520230279 U CN 201520230279U CN 204495576 U CN204495576 U CN 204495576U
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Abstract
The utility model discloses a kind of simulation testing device utilizing system reliability control characteristic for smoke discharging residual heat, comprise centrifugal blower, test section, simulation component, automatic regulating valve and measurement mechanism, 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, is provided with electrical heating test section, flue gas heat-exchange unit simulation test section on the way successively; Separately be disposed with air temperature modification test section and preheating of air test section on the way, preheating of air test section is connected by pipeline with flue gas heat-exchange unit simulation test section; When this experiment table can ensure flue gas heat-exchange unit simulation cigarette temperature respectively and air preheater outlet air temperature is constant, carry out preheating of air test section intake air temperature working condition experimenting respectively, flue gas heat-exchange unit simulation test section becomes inlet flue gas temperature working condition experimenting, recirculated water variable work condition test.
Description
Technical field
The utility model relates to a kind of simulation testing device utilizing system reliability control characteristic for smoke discharging residual heat.
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.
In order to prevent the cold end corrosion of back-end ductwork, smoke discharging residual heat utilizes system to be in operation needs minimum exhaust gas temperature higher than acid dew point, and there is cold end corrosion phenomenon to prevent air preheater, should ensure that entrance air temperature can not be too low, therefore, in " utilizing smoke discharging residual heat to heat air preheater import cold air to introduce boiler energy-saving system ", ensure that smoke evacuation outlet temperature and air preheater temperature in are very important.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, but practical engineering experience is still not enough, especially for ensureing that the design proposal of exhaust gas temperature and air preheater entrance air temperature does not still have clear and definite test effect, 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; And adopting process modeling software to carry out simulation calculation, the result obtained has limitation.
Utility model content
The utility model, in order to solve the problem, proposes a kind of simulation testing device utilizing system reliability control characteristic for smoke discharging residual heat, 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, system is emulated.
To achieve these goals, the utility model adopts following technical scheme:
Utilize a simulation testing device for system reliability control characteristic for smoke discharging residual heat, comprise centrifugal blower, test section, simulation component, automatic regulating valve 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, is provided with electrical heating test section, flue gas heat-exchange unit simulation test section on the way successively;
Separately be disposed with air temperature modification test section and preheating of air test section on the way, preheating of air test section is connected by pipeline with flue gas heat-exchange unit simulation test section;
Pipeline is outside equipped with simulation component, and simulation component comprises expansion tank and water bath with thermostatic control, and expansion tank and flue gas heat-exchange unit simulation test section water side outlet draw arm respectively, and configure automatic regulating valve, access flue gas heat-exchange unit simulation test Duan Shui side entrance place; Be connected by the inlet tube and outlet tube of the inlet tube and outlet tube of water bath with thermostatic control with air temperature modification test section heat-exchanging tube bundle, form recirculated water closed-loop, water bath with thermostatic control is provided with constant temperature water tank ebullator;
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 air temperature modification test section connects water bath with thermostatic control, water bath with thermostatic control connects constant temperature water tank ebullator, constant temperature water tank ebullator connects air temperature modification test section, forms circulation, and is provided with spinner-type flowmeter between constant temperature water tank ebullator and air temperature modification test section.
The ducting outlet place set temperature sensor of described flue gas heat-exchange unit simulation test section and preheating of air test section, by automatic regulating valve, FEEDBACK CONTROL adjustment is carried out to arm flow, control the ducting outlet temperature constant of flue gas heat-exchange unit simulation test section and preheating of air test section respectively.
Based on an emulation testing experimental technique for said apparatus, specifically comprise the following steps:
(1) variable working condition automatically adjusts, and to control preheating of air test section outlet air temperature constant for valve;
(2) variable working condition automatically adjusts, and to control flue gas heat-exchange unit simulation test section exit gas temperature constant for valve.
In described step (1), concrete grammar comprises the following steps:
1. at the ducting outlet place set temperature sensor of preheating of air test section, arm is drawn respectively at open axial flow fan and the outlet of flue gas heat-exchange unit simulation test section, water side-entrance place of access flue gas heat-exchange unit simulation test section, and automatic regulating valve is set carries out flow regulation, constant to ensure the outlet wind-warm syndrome of preheating of air test section;
2. carry out preheating of air test section intake air temperature working condition tests, concrete implementation step is as follows;
A. water bath with thermostatic control water-filling, and be heated to design temperature;
B. 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;
C. 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 1.52:1;
D. connect electric heating tube, the temperature of setting simulated flue gas heats flue gas heat-exchange unit simulation test section;
E., 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;
F. 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.
3. carry out flue gas heat-exchange unit simulation test section and become inlet flue gas temperature working condition tests, concrete implementation step is as follows;
I. 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 1.52:1;
II. connect electric heating tube, change the temperature of setting simulated flue gas, flue gas heat-exchange unit simulation test section is heated;
III., 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;
IV. 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 step I-III 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.
4. carry out recirculated water variable working condition test, concrete implementation step is as follows;
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 F and flue gas heat-exchange unit simulation test section D is 1.52:1;
B. connect electric heating tube, the temperature of setting simulated flue gas heats flue gas heat-exchange unit simulation test section D;
C. regulate the latter linked valve of water circulating pump G, circulating water flow is controlled, reach 50% of setting flow;
D. 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;
E. 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.
In described step (2), experimental technique comprises:
(2-1) at the ducting outlet place set temperature sensor of flue gas heat-exchange unit simulation test section, arm is drawn respectively at open axial flow fan and the outlet of flue gas heat-exchange unit simulation test section, water side-entrance place of access flue gas heat-exchange unit simulation test section, and automatic regulating valve is set carries out flow regulation, constant to ensure the outlet wind-warm syndrome of flue gas heat-exchange unit simulation test section.
(2-2) carry out preheating of air test section intake air temperature working condition tests, 2. implementation step is identical with described step (1) for concrete steps;
(2-3) carry out flue gas heat-exchange unit simulation test section and become inlet flue gas temperature working condition tests, 3. implementation step is identical with described step (1) for concrete steps;
(2-4) carry out recirculated water variable working condition test, 4. implementation step is identical with described step (1) for concrete steps.
The beneficial effects of the utility model are:
(1) according to flowing, the heat transfer characteristic of the energy-saving system for power plant each equipment actual condition of simulative power plant that " utilizes smoke discharging residual heat to heat air preheater import cold air to introduce boiler energy-saving system ", emulation testing is carried out to system;
(2) when this experiment table can ensure flue gas heat-exchange unit simulation cigarette temperature respectively and air preheater outlet air temperature is constant, carry out preheating of air test section intake air temperature working condition experimenting respectively, flue gas heat-exchange unit simulation test section becomes inlet flue gas temperature working condition experimenting, recirculated water variable work condition test;
(3) design proposal in order to prevent back-end ductwork and low-temperature corrosion of air preheater is drafted, and the dynamic response of system under different operating mode is tested, for the design of power plant's Practical Project, safe operation provide reliable test figure basis, and system variable working condition prediction change curve.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
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; M-exhaust outlet; N-data acquisition unit; S-automatic regulating valve; 1-12-electric thermo-couple temperature measuring point; 18-spinner-type flowmeter.
Embodiment:
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
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 the record electrical heating water bath with thermostatic control J of heat time, the supporting ebullator of water bath with thermostatic control, data acquisition unit N, automatic regulating valve S; Measurement mechanism comprises pitot tube, electronic micro-manometer, air channel measuring point temperature sensor, recirculated water measuring tempeature sensor, spinner-type flowmeter.
This platform can measure the control characteristic test of system reliability under different affecting factors, during measurement, draw arm respectively from high-order open axial flow fan and the outlet of flue gas heat-exchange unit simulation test section, and configure automatic regulating valve, access flue gas heat-exchange unit simulation test section porch; Respectively at the ducting outlet place set temperature sensor of flue gas heat-exchange unit simulation test section and preheating of air test section, by automatic regulating valve, FEEDBACK CONTROL adjustment is carried out to arm flow, control the ducting outlet temperature constant of flue gas heat-exchange unit simulation test section and preheating of air test section respectively, and record the Parameters variation situation of each measuring point of dynamic test, obtain the control characteristic test findings of system reliability.
In actual measurement, measure in accordance with the following steps:
(1) automatic regulating valve S control preheating of air test section F outlet air temperature is constant
1. at the ducting outlet place set temperature sensor of preheating of air test section F, arm is drawn respectively at open axial flow fan H and flue gas heat-exchange unit simulation test section D water side outlet, water side-entrance place of access flue gas heat-exchange unit simulation test section D, and automatic regulating valve S is set respectively carries out flow regulation, constant to ensure that the F of preheating of air test section exports wind-warm syndrome;
2. preheating of air test section F intake air temperature operating mode
A. water bath with thermostatic control water-filling, and be heated to design temperature;
B. 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);
C. 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;
D. connect electric heating tube, the temperature of setting simulated flue gas heats flue gas heat-exchange unit simulation test section D;
E. 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;
F. 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.
3. flue gas heat-exchange unit simulation test section D variable working condition
I. 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;
II. connect electric heating tube, change the temperature of setting simulated flue gas, flue gas heat-exchange unit simulation test section D is heated;
III. 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;
IV. 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.
4. recirculated water variable working condition
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 F and flue gas heat-exchange unit simulation test section D is 1.52:1;
B. connect electric heating tube, the temperature of setting simulated flue gas heats flue gas heat-exchange unit simulation test section D;
C. regulate the latter linked valve of water circulating pump G, circulating water flow is controlled, reach 50% of setting flow;
D. 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;
E. 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.
(2) automatic regulating valve S control flue gas heat-exchange unit simulation test section D outlet " flue gas " is temperature-resistant
1. at the ducting outlet place set temperature sensor of flue gas heat-exchange unit simulation test section D, export at open axial flow fan H and flue gas heat-exchange unit simulation test section D respectively and draw arm, water side-entrance place of access flue gas heat-exchange unit simulation test section D, and automatic regulating valve S is set carries out flow regulation, constant to ensure the outlet wind-warm syndrome of flue gas heat-exchange unit simulation test section D;
2. carry out preheating of air test section intake air temperature working condition tests, 2. implementation step is identical with described step (1) for concrete steps;
3. carry out flue gas heat-exchange unit simulation test section and become inlet flue gas temperature working condition tests, 3. implementation step is identical with described step (1) for concrete steps;
4. carry out recirculated water variable working condition test, 4. implementation step is identical with described step (1) for concrete steps.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.
Claims (3)
1. utilize a simulation testing device for system reliability control characteristic for smoke discharging residual heat, it is characterized in that: comprise centrifugal blower, test section, simulation component, automatic regulating valve 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, is provided with electrical heating test section, flue gas heat-exchange unit simulation test section on the way successively;
Separately be disposed with air temperature modification test section and preheating of air test section on the way, preheating of air test section is connected by pipeline with flue gas heat-exchange unit simulation test section;
Pipeline is outside equipped with simulation component, and simulation component comprises expansion tank and water bath with thermostatic control, and expansion tank and the outlet of flue gas heat-exchange unit simulation test section draw arm respectively, and configure automatic regulating valve, access flue gas heat-exchange unit simulation test section porch; Be connected by the inlet tube and outlet tube of the inlet tube and outlet tube of water bath with thermostatic control with air temperature modification test section heat-exchanging tube bundle, form recirculated water closed-loop, water bath with thermostatic control is provided with constant temperature water tank ebullator;
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 simulation testing device utilizing system reliability control characteristic for smoke discharging residual heat as claimed in claim 1, it is characterized in that: described air temperature modification test section connects water bath with thermostatic control, water bath with thermostatic control connects constant temperature water tank ebullator, constant temperature water tank ebullator connects air temperature modification test section, form circulation, and be provided with spinner-type flowmeter between constant temperature water tank ebullator and air temperature modification test section.
3. a kind of simulation testing device utilizing system reliability control characteristic for smoke discharging residual heat as claimed in claim 1, it is characterized in that: the ducting outlet place set temperature sensor of described flue gas heat-exchange unit simulation test section and preheating of air test section, by automatic regulating valve, FEEDBACK CONTROL adjustment is carried out to arm flow, control the ducting outlet temperature constant of flue gas heat-exchange unit simulation test section and preheating of air test section respectively.
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| CN201520230279.2U CN204495576U (en) | 2015-04-16 | 2015-04-16 | The simulation testing device of system reliability control characteristic is utilized for smoke discharging residual heat |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748995A (en) * | 2015-04-16 | 2015-07-01 | 山东大学 | Reliable-regulation simulation test device for flue gas waste heat utilization system |
| CN104777008A (en) * | 2015-04-16 | 2015-07-15 | 山东大学 | Performance simulation testing experimental device for power plant smoke waste heat utilizing system |
-
2015
- 2015-04-16 CN CN201520230279.2U patent/CN204495576U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104748995A (en) * | 2015-04-16 | 2015-07-01 | 山东大学 | Reliable-regulation simulation test device for flue gas waste heat utilization system |
| CN104777008A (en) * | 2015-04-16 | 2015-07-15 | 山东大学 | Performance simulation testing experimental device for power plant smoke waste heat utilizing system |
| CN104777008B (en) * | 2015-04-16 | 2018-04-06 | 山东大学 | A kind of power-plant flue gas afterheat utilizing system performance simulation experimental apparatus for testing |
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