CN102128444B - A kind of device making therrmodynamic system stable - Google Patents
A kind of device making therrmodynamic system stable Download PDFInfo
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- CN102128444B CN102128444B CN201110081198.7A CN201110081198A CN102128444B CN 102128444 B CN102128444 B CN 102128444B CN 201110081198 A CN201110081198 A CN 201110081198A CN 102128444 B CN102128444 B CN 102128444B
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Abstract
The present invention is a kind of device making therrmodynamic system stable.Even if it adds the stable device of a vapor absorber-therrmodynamic system in therrmodynamic system, the formation of this device is: be made up of admission part, water inlet portion, water part, control section, water discharging part.The object that the device making therrmodynamic system stable of the present invention reaches and scabbles system pressure peak value, stablize whole therrmodynamic system, improve boiler operatiopn operating mode, extend pipeline and valve accessories service life.
Description
Technical field
The invention belongs to therrmodynamic system technical field, what be specifically related to be suitable for only having the heat user of trough makes the device that whole therrmodynamic system is stable.
Background technology
In existing therrmodynamic system, heat user steam consumption periodically occurs that (of short duration) uses vapour trough, and instant steam has reduced by more than more than 17% of regular supply amount.Because steam pressure changes greatly in jet chimney, heat distribution pipeline often will bear very large alternation compression and alternating thermal stress, and this is by the service life of shortening heat hydraulic piping.The thermic load Steam Turbine that the impact that produces feeds through to heat supply that fluctuates is run, and larger fluctuation (first increase, rear reduction) can appear in unit electric load instantaneously, if steam turbine is when rated load operation, often occurs moment excess load phenomenon.Heat user " suppresses vapour ", " drawing vapour " time boiler pressure can increase rear reduction instantaneously, make boiler drum level fluctuation, feed-regulating valve leaves suddenly, suddenly close, when confluent is increased sharply, feed main pressure reduces, auxiliary feed water pump, often by low hydraulic pressure interlocked startup, causes water supply system unstable.The change of heat user steam consumption causes greatly boiler operatiopn degrading, brings a lot of problem: 1, fire box temperature is unstable, and various parameter is restive, and boiler efficiency reduces; 2, burner hearth coking is serious, and run flourishing, fire grate will be obstructed and arch camber; 3 steam parameters are unstable, the irregular frequent open and close of desuperheating water, and desuperheating water pipeline often produces steam and water bursting; 4, temperature regulates difficulty.
Summary of the invention
The object of the invention is to overcome above-mentioned Problems existing, a kind of device making therrmodynamic system stable be provided, just regulated by heat dump when steam consumption more than heat user of the evaporation capacity for engine in power station, balance, make boiler load keep stable, improve the stability that equipment runs.
Technical scheme of the present invention is: even if add the stable device of a vapor absorber-therrmodynamic system in therrmodynamic system, the formation of this device is: be made up of admission part, water inlet portion, water part, control section, water discharging part, being constructed as follows of each part:
1) admission part: be connected between jet chimney and storage tank by Pressure gauge, steam control valve, filter, stop valve, vacuum breaker device, injector pipeline, forms the admission part of storage tank;
2) water inlet portion: with pipeline, by valve, steam turbine condensate water is connected with storage tank; Valve, filter, pneumatic water inlet switch valve, non-return valve are connected between cold demineralized water pipeline and storage tank, cold demineralized water is connected with storage tank, make storage tank enter cold demineralized water;
3) water part: by stop valve, heat-exchanger pump, sample valve, Pressure gauge, be connected between hot-water line and storage tank; Hot-water line is connected with condensation jellyfish pipe, and the water in storage tank is beaten to condensation jellyfish pipe by heat-exchanger pump, and condensation jellyfish pipe is connected with oxygen-eliminating device;
4) control section: temperature inductor, level sensor, steam control valve, pneumatic on-off valve, heat-exchanger pump are connected with DCS system by signal cable, realizes process system and controls;
5) water discharging part: valve is connected with storage tank by pipeline, realizes draining.
Device of the present invention has following characteristics:
1, for ensureing the quantity of steam continuously adjustabe absorbed in whole process, having selected the steam control valve 3 of two homodromous movements to form and having controlled, the while that two steam control valves 3 being when controller output signal is 4 ~ 12.5mA from full cut-off to standard-sized sheet.
2, after the steam control valve 3 that employing two negotiabilities are identical forms control system, the adjustable extent of its steam control valve 3 expands one times than adjustable extent when adopting separate unit steam control valve 3 to control, different requirement of producing load can be met completely, and the precision controlled have also been obtained raising, Mass Control is improved, and the stability of simultaneously producing and security are also improved further.
3, the mode of two steam control valves 3 parallel connection is adopted to also have a benefit, be exactly that two steam control valves 3 can be for subsequent use each other, just in case wherein one is out of order, all the other one equally also can use, can't as only having a steam control valve 3, as long as one breaks down, will impact production at once.
4, for reducing the problems such as noise that steam direct heating water tank brings, vibration and thermal stratification, according to steam flow, have selected two groups of steam jet ejectors 5 (often organizing four, totally eight).Cold water operationally sucks by injector 5, mix in its cavity with steam, then the hot water jet be mixed to form is entered storage tank 18, operationally injector 5 inside produces vortex, even if steam and water also can be made so under a relatively high pressure fully to mix; Eddy current also can cause the flowing of external fluid to play stirring and ringing to liquid simultaneously, and the temperature therefore in storage tank 18 can be consistent, and can not produce thermal stratification; Noise and vibration are dropped to minimum simultaneously.
5, in order to avoid after steam control valve cuts out, after valve, steam-condensation forms vacuum, makes the aqueous reflux in storage tank enter jet chimney and form water hammer, have employed vacuum breaker device 4 in control valve rear end.
6, the device the making therrmodynamic system stable of the present invention object that reaches and scabble system pressure peak value, stablize whole therrmodynamic system, improve boiler operatiopn operating mode, extend pipeline and valve accessories service life.
Accompanying drawing explanation
Fig. 1 is the apparatus structure schematic diagram making therrmodynamic system stable of the present invention.
In figure: 1-stop valve, 2-vapor filter, 3-steam control valve, 4-vacuum breaker device, 5-steam jet ejector, 6-level sensor, 7-fluid level transmitter, 8-temperature inductor, 9-is intake stop valve, 10-water inflow filter, the pneumatic water inlet switch valve of 11-, 12-non-return valve, 13-condensate water water intaking valve, 14-heat-exchanger pump, 15-steam pressure transmitter, 16-is Pressure gauge on the spot, 17-sample valve, 18-storage tank, 19-drainpipe, the cold demineralized water water inlet pipe of 20-, 21-steam turbine condensate pipe, 22-jet chimney, 23-overflow pipe, 24-evacuated tube, 25-hot-water line, 26-discharging valve, 27-condensation jellyfish pipe, 28-oxygen-eliminating device.
Detailed description of the invention
As shown in Figure 1, the device making therrmodynamic system stable of the present invention is by stop valve 1, vapor filter 2, steam control valve 3, vacuum breaker device 4, steam jet ejector 5, level sensor 6, fluid level transmitter 7, temperature inductor 8, water inlet stop valve 9, water inflow filter 10, pneumatic water inlet switch valve 11, non-return valve 12, condensate water water intaking valve 13, heat-exchanger pump 14, steam pressure transmitter 15, Pressure gauge 16 on the spot, sample valve 17, storage tank 18, drainpipe 19, cold demineralized water water inlet pipe 20, steam turbine condensate pipe 21, jet chimney 22, overflow pipe 23, evacuated tube 24, hot-water line 25, discharging valve 26, condensation jellyfish pipe 27, composition such as oxygen-eliminating device 28 grade,
The annexation of each equipment room:
1) admission part: be connected between jet chimney 22 and storage tank 18 by Pressure gauge 16, steam control valve 3, filter 2, stop valve 1, vacuum breaker device 4, injector 5 pipeline, forms the admission part of storage tank 18;
2) water inlet portion: with pipeline 21, by valve 13, steam turbine condensate water is connected with storage tank 18; Valve 9, filter 10, water inlet pneumatic on-off valve 11, non-return valve 12 are connected between cold demineralized water pipeline 20 and storage tank 18, cold demineralized water are connected with storage tank, make storage tank enter cold demineralized water;
3) water part: by stop valve 1, heat-exchanger pump 14, sample valve 17, Pressure gauge 16, be connected between hot-water line 25 and storage tank 18; Hot-water line 25 is connected with condensation jellyfish pipe 27, and the water in storage tank 18 is beaten to condensation jellyfish pipe 27 by heat-exchanger pump 14, and condensation jellyfish pipe 27 is connected with oxygen-eliminating device 28, then to oxygen-eliminating device 28;
4) control section: temperature inductor 8, level sensor 6, steam control valve 3, pneumatic on-off valve 11, heat-exchanger pump 14 are connected with DCS system by signal cable, realizes process system and controls;
5) water discharging part: valve 26 is connected with storage tank by pipeline 19, realizes draining.
Admission pipeline is connected with main steam line 22, and inlet channel is from two systems, and steam turbine condensate pipe 21 is connected with steam turbine condensate water outlet conduit; Cold demineralized water water inlet pipe 20 is connected with cold demineralized water pipeline.The water of heating is got to condensation jellyfish pipe 27 by pump 14 by hot-water line 25 by water outlet, then to oxygen-eliminating device 28.Process control is by DCS system picture, and through programming, realize automatically controlling, also changeable is Non-follow control.
Operation principle: when in 4 kg of vapor pipelines 22 during the Mpa of pressure >=0.40, two steam control valves 3 are opened according to given pace simultaneously, steam is sprayed into heating water in storage tank 18, when in jet chimney 22 during pressure < 0.40 Mpa, two steam control valves 3 cut out according to given pace, keep pressure stability in jet chimney 22.Water in storage tank 18 regulates maintenance ordinary water level by desalination water pipe 20, steam turbine condensate pipe 21 water by valve pneumatic on-off valve 11, condensate water water intaking valve 13.When water tank 18 liquid level attains to a high place (1200mm), hot water is beaten to condensation jellyfish pipe 27 by heat-exchanger pump 14 self-starting, then to oxygen-eliminating device 28; When water tank 18 liquid level reaches low level (800mm), heat-exchanger pump 14 stops automatically.When temperature reaches setting value 70 DEG C, pneumatic water inlet switch valve 11 opens moisturizing automatically, and when temperature reaches setting value 65 DEG C, pneumatic water inlet switch valve 11 cuts out automatically.During repair apparatus, close all admission, water intaking valve, cut off heat-exchanger pump power supply, open discharging valve 26, can keep in repair after discharging water.
Claims (1)
1. make the device that therrmodynamic system is stable, it is characterized in that being made up of admission part, water inlet portion, water part, control section, water discharging part, being constructed as follows of each part:
1) admission part: be connected between jet chimney (22) and storage tank (18) by Pressure gauge (16), steam control valve (3), filter (2), stop valve (1), vacuum breaker device (4), injector (5) pipeline, forms the admission part of storage tank (18);
2) water inlet portion: use pipeline A(21), by valve (13), steam turbine condensate water is connected with storage tank (18); By valve A(9), filter (10), water inlet pneumatic on-off valve (11), non-return valve (12) is connected between cold demineralized water pipeline (20) and storage tank (18);
3) water part: by stop valve (1), heat-exchanger pump (14), sample valve (17), Pressure gauge (16), be connected between hot-water line (25) and storage tank (18); Hot-water line (25) is connected with condensation jellyfish pipe (27), and condensation jellyfish pipe (27) is connected with oxygen-eliminating device (28);
4) control section: temperature inductor (8), level sensor (6), steam control valve (3), pneumatic on-off valve (11), heat-exchanger pump (14) are connected with DCS system by signal cable;
5) water discharging part: valve B(26) by pipeline B(19) be connected with storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110081198.7A CN102128444B (en) | 2011-04-01 | 2011-04-01 | A kind of device making therrmodynamic system stable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110081198.7A CN102128444B (en) | 2011-04-01 | 2011-04-01 | A kind of device making therrmodynamic system stable |
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| CN102128444A CN102128444A (en) | 2011-07-20 |
| CN102128444B true CN102128444B (en) | 2015-09-09 |
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| FR2363061A1 (en) * | 1976-08-23 | 1978-03-24 | Petroles Cie Francaise | METHOD OF STORING A FLUID BY MEANS OF A TANK LIMITING ENTHALPY DEGRADATION |
| CN2636191Y (en) * | 2003-06-14 | 2004-08-25 | 董兆温 | Steam heat storage device |
| CN202024302U (en) * | 2011-04-01 | 2011-11-02 | 昆明醋酸纤维有限公司 | Device stabilizing thermodynamic system |
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