CN103573413A - Energy-saving air inlet anti-icing device of gas turbine - Google Patents
Energy-saving air inlet anti-icing device of gas turbine Download PDFInfo
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- CN103573413A CN103573413A CN201210250625.4A CN201210250625A CN103573413A CN 103573413 A CN103573413 A CN 103573413A CN 201210250625 A CN201210250625 A CN 201210250625A CN 103573413 A CN103573413 A CN 103573413A
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- 238000010438 heat treatment Methods 0.000 claims abstract description 81
- 239000007789 gas Substances 0.000 claims description 64
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 40
- 239000003546 flue gas Substances 0.000 claims description 40
- 238000001914 filtration Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 210000001520 comb Anatomy 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004134 energy conservation Methods 0.000 abstract description 5
- 230000002411 adverse Effects 0.000 abstract description 2
- 230000006872 improvement Effects 0.000 abstract description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 24
- 239000000779 smoke Substances 0.000 description 16
- 238000002485 combustion reaction Methods 0.000 description 14
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 14
- 238000000034 method Methods 0.000 description 11
- 238000010977 unit operation Methods 0.000 description 8
- 238000002156 mixing Methods 0.000 description 7
- 238000010992 reflux Methods 0.000 description 7
- 238000010304 firing Methods 0.000 description 6
- 239000011435 rock Substances 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- UBAZGMLMVVQSCD-UHFFFAOYSA-N carbon dioxide;molecular oxygen Chemical compound O=O.O=C=O UBAZGMLMVVQSCD-UHFFFAOYSA-N 0.000 description 2
- 230000004087 circulation Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000003517 fume Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The invention relates to an energy-saving air inlet anti-icing device of a gas turbine, which is an improvement on the air inlet anti-icing device of a compressor of the existing gas turbine. Relates to the technical field of non-variable volume engines, heat exchange and pipeline systems. The device is characterized in that the structure of the hybrid heating device is that a plurality of rows of hybrid heating calandria (11) are arranged in parallel, two ends of the hybrid heating calandria (11) are connected with connecting boxes (10), the connecting boxes (10) at two ends of the calandria are communicated at one end to form an n-shaped shape, and the middle part of the communicated edge of the n-shaped connecting boxes (10) is connected with an air outlet pipe of a draught fan (8); the n-shaped connecting box inclines downwards at an angle of 1-3 degrees with the horizontal plane along the airflow direction, and a tiny connecting box low-point drainage hole (12) is arranged at the bottom of the lowest end of the connecting box. The invention can reduce the power loss of the gas turbine unit caused by the anti-icing system and the adverse effect on the operation stability of the unit, and has the functions of anti-icing, anti-frost and energy conservation.
Description
Technical field
The present invention is the energy-saving air inlet deicer of a kind of gas turbine, is the improvement to the compressor inlet air deicer of existing gas turbine.Relate to non variable capacitance type motor, heat exchange and pipe-line system technical field.
Background technique
PetroChina Company Limited.'s natural gas line combustion drive compressor group that puts into operation is ended existing 113 of the end of the year 2011, mainly comprises RR unit (27), GE unit (63) and Solar unit (21).These units are operated in the comparatively severe central and west regions of environment mostly, especially under the working condition of low temperature, high humility, may occur the icing situation of moisture in air inlet, can cause heavy losses to unit.There are a lot of problems in the existing ice control of these units, for example RR, GE unit are all equipped with the compressor inlet air anti-icing system from blower outlet bleed, and its major defect is to consume energy large and reliability is poor, and Solar unit is not installed this system.Although the anti-icing technical concept of existing compressor inlet of RR and GE unit is similar, in the operation of existing anti-icing system, to control and have different theories, this makes energy-conservation and this two aspect of reliability of unit can not fine combination.It is comparatively simple that RR unit is controlled theory, and its anti-icing system is only controlled by ambient temperature, as long as ambient temperature is lower than certain value (5 ℃), no matter unit operation whether, anti-icing control valve all can all be opened.Although this controlling method can not affect the operation of unit, there is higher reliability, consumed energy is larger, has affected to a great extent the macroeconomic of unit.The anti-icing system aperture of RR unit is non-adjustable, and energy consumption is larger.
The anti-icing system of GE unit is controlled according to ambient temperature and humidity two aspect parameters, when ambient temperature is lower than certain value (being about 4.4 ℃), and when humidity of the air is greater than the corresponding controlled humidity of this ambient temperature, anti-icing control valve will all be opened, from blower outlet a part of high temperature and high pressure gas that refluxes, guide to after inlet air filter element, be used for heating compressor air inlet machine, with this, reach anti-icing object.With respect to RR unit, GE unit has been considered the whole efficiency of unit better, and anti-icing control valve can regulate according to actual compressor air inlet machine temperature, within compressor air inlet machine temperature being remained on be greater than 0.5 ℃ of the minimum setting value of intake temperature.But whole adjustment process will complete in 15 minutes, if can not complete adjusting within this time, unit will be shut down, and provides corresponding warning message, badly influences the global stability of unit.
Adopt gas compressor to bleed as heated air, the power of gas turbine unit and the thermal efficiency are caused damage.
In addition, the problem that air filtering core frosting affects unit operation, at the compressor inlet place in air filtering core downstream, can not be taken into account in the position of existing reflux gas Hybrid Heating inlet air.In addition, the hybrid heating device of existing heating position before air filter, its heat outlet makes progress, and not only can not prevent dust, and not add water of condensation discharge (low spot) hole.In order to improve the Economy of unit operation and the stable operation of guarantee unit, these aspects all need to be improved.
CN101661451A discloses the energy-saving air inlet deicer of a kind of gas turbine, but this visual plant of its hybrid heating device unexposed concrete structure, specific implementation gets up still to have difficult point.
Summary of the invention
The object of the invention is to invent and a kind ofly reduce that anti-icing system causes gas turbine unit power loss and to the anti-icing frost prevention of unit operation stability adverse effect, the energy-saving air inlet deicer of the energy-conservation gas turbine of taking into account.
The anti-icing system of existing gas turbine as shown in Figure 1, is from the gas compressor bleeding point 3 gas turbine 1, to take over roads after adjusting control valve door 4, to access after air intake filtration device 2 blending point 5 before the system reform in air channel.
The present invention is directed to the deficiency of the existing anti-icing system of gas turbine, main thought is by the High Temperature High Pressure air at blower outlet place, to be changed the gas of heating compressor inlet air the high-temperature flue gas of gas turbine discharge into, according to the anti-icing system after this ideological remoulding as shown in Figure 2.On flue top, high-temperature flue gas fairlead 6 is set, high-temperature flue gas fairlead 6 connects induced draught fan 8 through manual regulating valve 7, the exhaust port of induced draught fan 8 connects hybrid heating device 9, hybrid heating device 9 tops are mounted air intake filtration devices 2, give a dinner for a visitor from afar to gas turbine 1 suction port after air intake filtration device 2.
The structure of described hybrid heating device 9 as shown in Figure 3-Figure 5, it is that many row's Hybrid Heating combs 11 are arranged in parallel, Hybrid Heating comb 11 two ends connect case 10, company's case 10 at comb two ends is at one end communicated with, become " Π " shape, " Π " shape, connect the air outlet tube that middle part that case 10 is communicated with limits connects induced draught fan 8; " Π " shape connects the downward-sloping of case ° angle along airflow direction horizontal by 1-3, in its least significant end bottom, small company's case low spot weep hole 12 is set;
As shown in Figure 4 and Figure 5, it is pipe to the structure of described Hybrid Heating comb 11, and on bottom 1/4 tube wall vertical along axis at each pipe, horizontal plane is deducted marks, symmetrical and be evenly equipped with 1 or 3 row's Hybrid Heating comb exhaust ports 13;
Described induced draught fan 8 is driven by frequency control motor.
The concrete methods of realizing of flue gas Hybrid Heating inlet air is as shown in Fig. 2-Fig. 3.At the air filtering core downside that adds up to many rows, the Hybrid Heating comb 11 of corresponding many rows circular section is installed.Hybrid Heating comb 11 two ends connect case 10, and are connected on the high temp. flue from induced draught fan 8.Lower half portion at Hybrid Heating comb 11 walls is provided with the suitable Hybrid Heating comb exhaust port 13 of six row's sizes, high-temperature flue gas flows out from Hybrid Heating comb exhaust port 13 air that blending sucks filter core, makes air before entering filter core, obtain the dual-heated of high-temperature flue gas blending and 11 radiation of Hybrid Heating comb.Hybrid Heating comb 11 middle parts are projection slightly, and middle part to two ends central axis is horizontal by the inclination of 1-3 ° of angle, makes its inner water of condensation flow into two ends and connects case 10, finally discharges by connecting case low spot weep hole 12 with together with water of condensation in connecting case 10.Can not make water stockpile and connect case 10 and Hybrid Heating comb 11 inside.Upper half part at Hybrid Heating comb 11 walls is not established aperture, and object is when unit blows ash, makes blown down dust can not fall into Hybrid Heating comb 11 inside.For reducing the thermal loss of flue gas in transmitting procedure, except Hybrid Heating comb 11, company's case 10 and induced draught fan 8 outsides need not be incubated, other pipelines must install thermal insulating material additional.
Aspect the control of anti-icing system, use for reference the control theory of GE, allow ambient temperature and atmospheric moisture jointly participate in anti-icing control, exactly when ambient temperature is greater than the corresponding controlled humidity of this ambient temperature lower than certain value (40 ℉ are about 4.4 ℃) and humidity of the air, anti-icing system just starts action, not only now to open anti-icing system adjusting control valve 4, but starting induced draught fan 8, induced draught fan 8 has frequency control of motor speed function, can do suitable Flow-rate adjustment according to compressor air inlet machine temperature.In bleed air lines, set valve is a manual regulating valve 7, just when system works, according to ambient temperature, be used for adjusting high temperature gases recirculating amount, guarantee that high-temperature flue gas heating compressor air inlet machine is not less than anti-icing requirement, because of the compressor air inlet machine temperature variation that variation of ambient temperature in a day causes little, adopt manual tune, the operator's workload causing is very micro-.If valve installation position is higher, can consider chain transmission, system is not worked and is closed this valve season.Because control system is simplified, just can avoid the shutdown risk of GE unit, reliability is improved.In addition,, because reflux heating gas is the high-temperature flue gas that flow is less, can not produce considerable influence to the power efficiency of unit.In the running of anti-icing system, smoke backflow amount is mainly by the adjustment of rotational speed of induced draught fan, and carries out environment coarse adjustment by manually-operated gate, and compressor air inlet machine temperature is controlled the temperature difference and suitably amplified, and avoids induced draught fan frequently to regulate.But should not make compressor air inlet machine excessive temperature higher than the temperature of anti-icing requirement, otherwise will have influence on the efficiency of unit.
Flue gas compressor inlet air and then realize anti-icing effect and be actually and utilize Hybrid Heating principle.This process can be similar to thinks an isobaric steady-state process.If do not consider the thermal loss of this process, the import and export gas for there is the control volume of this process, has following thermodynamic relation:
These two equations are representation quality conservation and energy conservation respectively.In two above equations, h represents the average enthalpy of the quality of mixed gas, and subscript out representative reaches the gas turbine inlet mixed gas of anti-icing requirement, and in representative has the Cryogenic air of ambient temperature, and FGR represents the flue gas of recirculation.
The smoke backflow amount that reaches anti-icing requirement can be tried to achieve by the calculating of two equations above, and can obtain on this basis participating in firing chamber the gas componant of reaction, and then considers the impact of smoke backflow on fuel combustion and Gas Turbine Output.The solving of equation (2) needs the composition of the known flue gas that be used for anti-icing heating, and this must react to obtain in conjunction with the combustion chemistry of fuel.For simplifying, calculate, suppose and think that the composition of gas turbine fuel-rock gas is pure methane, its combustion chemistry reaction is as follows:
CH
4+2(O
2+3.76N
2)=CO
2+2H
2O+7.52N
2 (3)
Suppose above-mentioned methane perfect combustion, the burning by the known every 1.5kg methane of equation (3) will consume 6kg oxygen, and generate the water of 4.125kg carbon dioxide and 3.375kg.
The Operational Limits of table 1RR and GE unit
The Operational Limits of the RR gas turbine providing according to table 1, gas turbine inlet air temperature is 5 ℃, gas turbine inlet air mass flow rate
for 96.9kg/s, and suppose that ambient temperature is-10 ℃.In calculating herein, due to the gas turbine temperature of exhaust fume lacking in flue gas recirculation situation, table 1 provides, and lower temperature of exhaust fume in winter---350 ℃ by the temperature being considered to for the circulating flue gas of anti-icing heating.According to above given condition, by inquiry perfect gas thermodynamic property table, obtain the enthalpy of each gas, finally can try to achieve the mass flow rate of backflow flue gas.First defining flue gas recirculation ratio is:
Equation (2) can be rewritten as:
(1-y)h
air,out+yh
FGR,out=(1-y)h
air,in+yh
FGR,in (5)
The calculating of equation (5) needs the composition of known flue gas.The mass percent of supposing nitrogen in flue gas, oxygen, carbon dioxide and moisture is respectively
with
by tabling look-up, can obtain
h
air，in=263.1kJ/kg,h
air，out=278.1kJ/kg (8)
The mass-conservation equation that can obtain oxygen, carbon dioxide and moisture according to chemical reaction equation (3) is as follows respectively:
Above three equations can be rewritten as respectively:
Consolidated equation (5), (12), (13) and (14), carry out iterative computation, can finally try to achieve flue gas recirculation ratio and be:
Therefore the flue gas recirculation flow that, reaches anti-icing requirement is:
Being scaled volume flowrate is about:
Smoke components (Vol%) after table 2 flue gas recirculation heating
Utilize same Hybrid Heating principle, if bled air inlet is heated to realize anti-icing effect by gas compressor, use 300 ℃ as extraction temperature, through calculating, required extraction flow is 4.613kg/s.By relatively finding, if use flue gas to heat inlet air, required reflux heating gas flow will significantly reduce.
According to above result of calculation, the result of calculation of the compressor air inlet machine composition after flue gas recirculation heating is listed in table 3.As can be seen from Table 3, because smoke backflow amount is not very large, the high limit that oxygen percent by volume in compressor inlet gas is mentioned higher than (2005) such as Rokke---18%, therefore can think that the inlet air heating through smoke backflow not only can reach anti-icing requirement, and can support the burning in firing chamber, can not have a negative impact to propagation of flame in firing chamber.
Compressor air inlet machine composition (Vol%) after table 3 flue gas recirculation heating
The present invention uses flue gas to replace gas compressor to bleed compressor inlet air to be carried out to anti-icing heating, reduce the power loss that anti-icing system causes unit, have significant energy-saving effect.Introduce manually-operated gate and replace traditional temperature control automatic system to control heating gas flow, the operation stability of unit is improved.Smoke backflow and inlet air blending reduce the oxygen concentration in firing chamber, are conducive to reduce the discharge of nitrogen oxide.In addition, technology involved in the present invention easily realizes, and one-time investment is less.Therefore, consider the gas turbine unit that quantity will significantly increase in recent years, the present invention not only can bring considerable economic benefit, and can improve the operation stability of gas turbine unit, has comparatively wide application prospect.
The effect of invention:
(1) with respect to former deicer, there is obvious energy saving effect;
(2) can effectively prevent the outer frosting of air filtering core;
The present invention adopts before smoke backflow heating equipment advances to inlet air filter by Hybrid Heating district, is ensureing that air inlet has also prevented the outer field frosting of air filtering core by air heating in anti-icing;
(3) can reduce the discharge of nitrogen oxide (NOx), be very beneficial for environmental protection;
Smoke backflow will reduce the concentration of the oxygen that participates in combustion reaction in firing chamber and decrease flame of combustion temperature; The discharge of the nitrogen oxide that this causes for minimizing high-temp combustion is very favorable; Utilize the anti-icing system of smoke backflow to reduce to a certain extent the pollution of unit operation to environment;
(4) control system is simplified, and reliability greatly improves;
By introducing manually-operated gate control smoke backflow amount, replace comparatively complicated temperature control automatic valve effectively to reduce the shutdown risk of GE unit, significantly improve the stability of unit operation;
(5) system architecture is simple, and one-time investment is less;
The transformation of smoke backflow anti-icing system mainly need to be purchased induced draught fan, flue gas channel, heating calancria and other auxiliary devices, does not relate to the electric control device that any complexity and price are higher.Therefore with respect to saved combustion turbine power loss, need relatively little investment, there is higher overall economic efficiency.
The present invention is applicable to be operated in to be had that relative moisture is large, under the environment of year atmospheric temperature lower than features such as time of 5 ℃ are long, and is arranged on the single circulation model gas turbine (with respect to many circulations, high efficiency unit) above such as land, offshore platform.Due to own parts to gas turbine not, do any change, the gas turbine of the various models of the manufacturers such as GE, RR, Solar all can be installed and used.
Accompanying drawing explanation
Schematic diagram before the transformation of Fig. 1 gas turbine anti-icing system
The energy-saving air inlet deicer of Fig. 2 gas turbine pie graph
Fig. 3 hybrid heating device front view
Fig. 4 hybrid heating device plan view
Fig. 5 hybrid heating device Local map
1-gas turbine, 2-air intake filtration device wherein
3-gas compressor bleeding point, 4-adjusting control valve door
Blending point 6-high-temperature flue gas fairlead before 5-system reform
7-manual tune valve, 8-induced draught fan
9-hybrid heating device 10-company case
11-Hybrid Heating comb 12-connects case low spot weep hole
13-Hybrid Heating comb exhaust port
Embodiment
Embodiment. this example be the RR Compressor Set of transferring natural gas from the west to the east be testing machine, it forms as shown in Figure 1.On flue top, high-temperature flue gas fairlead 6 is set, high-temperature flue gas fairlead 6 connects induced draught fan 8 through manual regulating valve 7, the exhaust port of induced draught fan 8 connects hybrid heating device 9, hybrid heating device 9 tops are mounted air intake filtration devices 2, give a dinner for a visitor from afar to gas turbine blower 1 suction port after air intake filtration device 2.
The structure of described hybrid heating device 9 as shown in Figure 3-Figure 5, it is that 10 row's Hybrid Heating combs 11 are arranged in parallel, Hybrid Heating comb 11 two ends connect case 10, company's case 10 at comb two ends is at one end communicated with, become " Π " shape, " Π " shape, connect the air outlet tube that middle part that case 10 is communicated with limits connects induced draught fan 8; " Π " shape connects downward-sloping along airflow direction horizontal by 2 ° of angles of case, in its least significant end bottom, small company's case low spot weep hole 12 is set;
As shown in Figure 4 and Figure 5, it is pipe to the structure of described Hybrid Heating comb 11, and on bottom 1/4 tube wall vertical along axis at each pipe, horizontal plane is deducted marks, symmetrical and be evenly equipped with 1 or 3 row's Hybrid Heating comb exhaust ports 13;
Described induced draught fan 8 is driven by frequency control motor.
The concrete methods of realizing of flue gas Hybrid Heating inlet air is as shown in Fig. 2-Fig. 3.0.3 meter of horizontal plane hybrid heating device 9 corresponding to erection space on the upper side below ading up to 15 rows' air filtering core.Device is configured to: both sides are respectively for company's case 10, two of 300x400xLmm connects the Hybrid Heating comb that 10 upper plan-positions of case are through with 15 row φ 100mm.The Hybrid Heating comb exhaust port 13 that is provided with six row φ 10mm in lower half portion of Hybrid Heating comb 11 walls, space is apart from 15mm.High-temperature flue gas flows out from Hybrid Heating comb exhaust port 13, and the water of condensation connecting in case 10 is discharged by the weep hole 12 that connects case low spot φ 10mm.
Below ading up to 15 rows' air filtering core on 0.3 meter of horizontal plane, the hybrid heating device 4 that erection space is corresponding, device is configured to: both sides are respectively for company's case 5 of 300x400xLmm, two connect the Hybrid Heating comb that 5 upper plan-positions of case are through with 15 row φ 100mm, tube wall both sides under the horizontal middle section of comb, symmetrical three row φ 10mm circular holes, space is apart from 15mm.High-temperature flue gas flows out from aperture, and the air blending before filter core with rising, makes air before entering filter core, obtain the dual-heated of high-temperature flue gas blending and comb radiation.Whole hybrid heating device is horizontal by the inclination of suitable angle, and it connects case tail bottom least significant end a φ 10mm dewatering orifice is set.In comb, if any water of condensation, can flow out from the aperture of least significant end, can not cause the moisture of device to stockpile.Upper half part of comb wall is not provided with aperture, and when object is that unit blows ash, the dust of blowing down can not fall into comb inside.For reducing the thermal loss of flue gas in transmitting procedure, except comb, company's case and blower fan outer wall need not be incubated, other pipelines must lay heat-insulation material.
By this example test, from energy-conservation consideration, although anti-icing system gas compressor is bled, reflux heating is not very large with extraction flow, and what draw back be the gas of High Temperature High Pressure, and flow loss 1/25 affects and does work nearby 1/25, and energy consumption also just slatterns 1/25 more.To consume gas 120,000 mark sides every day, the operation of traditional anti-icing system will slattern 4800 mark side's rock gases every day.With 1 year, lower than 5 ℃ of weather, have calculating in 4 months, unit of every operation, because anti-icing system will consume 57.6 ten thousand mark side's rock gases every year.If anti-icing system reflux heating is bled and is changed into gas turbine high temperature flue gas by blower outlet with gas, will save this part considerable fuel consumption.
On the other hand, the backflow of flue gas need to be used induced draught fan that power is provided, and need to consume certain electric energy.According to result of calculation, unit needs at most 3.800kg/s high-temperature flue gas for reflux heating under specified situation, and the volume flowrate that is converted to high-temperature flue gas is 6.823m
3/ s.From result of calculation, consider in Plant model selection and should have certain nargin, should select flow to be greater than 10m
3high-temperature centrifugal fan more than/s, its necessary electromotor power is 30kW.In the working time of anti-icing system, needing the electric energy consuming is 8.64 ten thousand kilowatt hours.
This example is in the test 4 months that needs anti-icing system work, and anti-icing by using improved device to carry out, every gas turbine unit will be saved every year 57.6 ten thousand mark side's rock gases under specified situation, but electric energy 8.64 ten thousand kilowatt hours that consume only more.PetroChina Company Limited.'s natural gas line, driving nearly 100 covers of unit with GE, RR combustion, can be saved nearly 5,700 ten thousand side's rock gases, many consuming electric power 8,640,000 kilowatt hours every year at present.And expect GE, RR combustion unit in 2015, will be increased to nearly 170 covers, can save every year 9700 ten thousand side's rock gases, simultaneously many power consumption 1468.8 ten thousand kilowatt hours.According to 2 yuan of Gas Prices/side, 1 yuan/kilowatt hour of electric energy is calculated, and natural gas line enterprise of Jiang Wei PetroChina Company Limited. saves 1.75 hundred million yuan every year.Therefore there is appreciable economic benefit.
Before this example employing smoke backflow heating equipment advances to inlet air filter by Hybrid Heating district, ensureing that air inlet has also prevented the outer field frosting of air filtering core by air heating in anti-icing.
This example also can reduce the discharge of nitrogen oxide (NOx), is very beneficial for environmental protection.Smoke backflow will reduce the concentration of participation combustion reaction oxygen in firing chamber and decrease flame of combustion temperature.The discharge of the nitrogen oxide that this causes for minimizing high-temp combustion is very favorable.As everyone knows, nitrogen oxide is the major pollutants of discharge of gas turbine, and reducing flame temperature is the effective ways that reduce this pollutant.Therefore, utilize the anti-icing system of smoke backflow will reduce to a certain extent unit operation pollution on the environment.
This example makes system control simplification, and reliability greatly improves.By the mode that adopts frequency control of motor speed induced draught fan and manually-operated gate to regulate, control smoke backflow amount, replace comparatively complicated temperature control automatic valve regulation, will effectively reduce the shutdown risk of unit, significantly improve the stability of unit operation.
This routine system architecture is simple, and one-time investment is less.
Claims (2)
1. the energy-saving air inlet deicer of gas turbine; high-temperature flue gas fairlead (6) is set on flue top; high-temperature flue gas fairlead (6) connects induced draught fan (8) through manual regulating valve (7); the exhaust port of induced draught fan (8) connects hybrid heating device (9); hybrid heating device (9) top is mounted air intake filtration device (2), gives a dinner for a visitor from afar to gas turbine blower (1) suction port after air intake filtration device (2); The structure that it is characterized in that hybrid heating device is that many row's Hybrid Heating combs (11) are arranged in parallel, Hybrid Heating comb (11) two ends connect and connect case (10), company's case (10) at comb two ends is at one end communicated with, become " Π " shape, " Π " shape, connect the air outlet tube that middle part that case (10) is communicated with limit connects induced draught fan (8); " Π " shape connects the downward-sloping of case ° angle along airflow direction horizontal by 1-3, in its least significant end bottom, small company's case low spot weep hole (12) is set.
2. the energy-saving air inlet deicer of gas turbine according to claim 1, it is characterized in that described Hybrid Heating comb (11) is pipe, and on bottom 1/4 tube wall vertical along axis at each pipe, horizontal plane is deducted marks, symmetrical and be evenly equipped with 1 or 3 row's Hybrid Heating comb exhaust ports (13); Each Hybrid Heating comb (11) middle part is slightly high, and middle part to two ends central axis, horizontal by the inclination of 1-3 ° of angle, makes its inner water of condensation flow into two ends and connects case (10).
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| CN201210250625.4A CN103573413B (en) | 2012-07-19 | 2012-07-19 | Energy-saving air inlet anti-icing device of gas turbine |
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|---|---|---|---|
| CN201210250625.4A CN103573413B (en) | 2012-07-19 | 2012-07-19 | Energy-saving air inlet anti-icing device of gas turbine |
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Cited By (2)
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| EP3091202A1 (en) * | 2015-05-07 | 2016-11-09 | General Electric Technology GmbH | Method for counteracting draft through an arrangement including a gas turbine during a stop |
| CN113153527A (en) * | 2020-12-22 | 2021-07-23 | 中国船舶重工集团公司第七0三研究所 | Improved IBH system of H-25 gas turbine generator set |
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| CN113153527A (en) * | 2020-12-22 | 2021-07-23 | 中国船舶重工集团公司第七0三研究所 | Improved IBH system of H-25 gas turbine generator set |
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|---|---|
| CN103573413B (en) | 2015-08-19 |
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