阅读说明：本技术 一种提升燃气轮机联合循环经济性的余热利用系统 (A kind of afterheat utilizing system promoting Gas Turbine Combined-cycle economy ) 是由 韩朝兵 戴坤鹏 张世东 黄素华 王健 黄伟栋 荆迪 郭赉佳 于 2019-08-28 设计创作，主要内容包括：本发明提供一种提升燃气轮机联合循环经济性的余热利用系统,它包括一立式管式空气预热器,以提高所述进口空气的温度；以及一设置在余热锅炉与所述立式管式空气预热器之间的主路烟道,所述主路烟道包括一进气烟道和一排气烟道,所述进气烟道设置在余热锅炉的低温省煤器烟气侧进口烟道与所述立式管式空气预热器进口之间将所述余热锅炉的烟气余热传递给所述立式管式空气预热器,所述排气烟道设置在所述立式管式空气预热器出口与所述余热锅炉低温省煤器烟气侧出口烟道之间将所述立式管式空气预热器换热后的烟气传送给所述余热锅炉。本发明采用从所述余热锅炉低温省煤器进口烟气侧抽出的部分低品位烟气来加热压气机进口空气,实现余热梯级利用,可进一步降低余热锅炉排烟温度,提高余热锅炉效率,提升联合循环机组的运行经济性。(The present invention provides a kind of afterheat utilizing system for promoting Gas Turbine Combined-cycle economy, it includes a vertical tubular air preheater, to improve the temperature of the inlet air；And one be arranged in main road flue between waste heat boiler and the vertical tubular air preheater, the main road flue includes an inlet air stack and an exhaust uptake, the inlet air stack, which is arranged between the low-level (stack-gas) economizer fume side inlet flue duct of waste heat boiler and the vertical tubular air preheater import, passes to the vertical tubular air preheater for the fume afterheat of the waste heat boiler, the exhaust uptake, which is arranged between the vertical tubular air preheater outlet and the waste heat boiler low-level (stack-gas) economizer fume side exhaust pass, sends the flue gas after vertical tubular air preheater heat exchange to the waste heat boiler.The present invention heats compressor inlet air using the part low-grade flue gas extracted out from the waste heat boiler low-level (stack-gas) economizer import fume side, realize exhaust heat stepped utilization, waste heat boiler exhaust gas temperature can be further decreased, waste heat boiler efficiency is improved, promotes the performance driving economy of combined cycle unit.)

1. a kind of afterheat utilizing system for promoting Gas Turbine Combined-cycle economy, which is characterized in that it includes:

One vertical tubular air preheater, the vertical tubular air preheater are arranged in gas turbine blower import, are used for To the inlet air heat exchange of the gas turbine blower import, to improve the temperature of the inlet air；And

One is arranged in the main road flue between waste heat boiler and the vertical tubular air preheater, and the main road flue includes one Low-level (stack-gas) economizer fume side inlet flue duct and the institute of waste heat boiler is arranged in inlet air stack and an exhaust uptake, the inlet air stack State between vertical tubular air preheater import that the fume afterheat of the waste heat boiler is passed to the vertical tubular air is pre- Hot device, the exhaust uptake are arranged in the vertical tubular air preheater outlet and the waste heat boiler low-level (stack-gas) economizer flue gas The flue gas after vertical tubular air preheater heat exchange is sent to the waste heat boiler between side outlet flue.

2. a kind of afterheat utilizing system for promoting Gas Turbine Combined-cycle economy as described in claim 1, feature exist In further including a bypass flue, the bypass flue is arranged between the inlet air stack and the exhaust uptake so as to flue gas The exhaust uptake is directly entered without the vertical tubular air preheater into inlet air stack and saves coal from the low temperature The discharge of device fume side exhaust pass.

3. a kind of afterheat utilizing system for promoting Gas Turbine Combined-cycle economy as described in claim 1, feature exist In being provided with an air intake control valve in the inlet air stack, the air intake control valve is used to adjust to be entered from the inlet air stack The exhaust gas volumn of the vertical tubular air preheater.

4. a kind of afterheat utilizing system for promoting Gas Turbine Combined-cycle economy as claimed in claim 3, feature exist In the air intake control valve can be gradually opened the bypass flue when progressively closing off the inlet air stack simultaneously.

5. a kind of afterheat utilizing system for promoting Gas Turbine Combined-cycle economy as claimed in claim 2, feature exist In being provided with a gas exhausting valve in the exhaust uptake, the gas exhausting valve is used to adjust to be entered from the bypass flue The exhaust gas volumn of the exhaust uptake.

6. a kind of afterheat utilizing system for promoting Gas Turbine Combined-cycle economy as claimed in claim 5, feature exist In the gas exhausting valve can be gradually opened the bypass flue when progressively closing off the exhaust uptake simultaneously.

7. a kind of afterheat utilizing system for promoting Gas Turbine Combined-cycle economy as claimed in claim 1 or 2, feature Be, one end of the bypass flue be arranged in the low-level (stack-gas) economizer fume side of the air intake control valve and the waste heat boiler into Between mouthful flue, other end setting the gas exhausting valve and the waste heat boiler low-level (stack-gas) economizer fume side exhaust pass it Between enter from the inlet air stack exhaust uptake so as to the air intake control valve and the gas exhaust inspecting valve regulation flue gas Amount.

8. a kind of afterheat utilizing system of promotion Gas Turbine Combined-cycle economy as described in claim 3 or 4 is any, It is characterized in that, the air intake control valve uses an inlet air stack baffle, and the inlet air stack baffle is for adjusting hot fume entrance Flue gas ratio in the vertical tubular air preheater and the bypass flue is then closed when opening the main road flue The bypass flue.

9. a kind of afterheat utilizing system of promotion Gas Turbine Combined-cycle economy as described in claim 5 or 6 is any, It is characterized in that, the gas exhausting valve uses an outlet damper, and the outlet damper is opening the main road flue When then close the bypass flue.

10. a kind of afterheat utilizing system for promoting Gas Turbine Combined-cycle economy as described in claim 1, feature exist In an air-introduced machine being arranged in the main road flue, for controlling the flue gas flow in flue.

11. a kind of afterheat utilizing system for promoting Gas Turbine Combined-cycle economy as described in claim 1, feature exist In further including first flow measuring device, it is located at the outlet damper in main road flue and between the air-introduced machine.

12. a kind of afterheat utilizing system for promoting Gas Turbine Combined-cycle economy as described in claim 1, feature exist In, further include an operation controller, it with the inlet air stack baffle, the outlet damper, the air-introduced machine and described The control system of gas turbine is connected, and the operation controller uses following working method:

(1) when needing to put into the system, damper is closed entirely, and the air-introduced machine starts under power frequency mode, so that from described The hot fume of waste heat boiler low-level (stack-gas) economizer flue gas side-entrance extraction all flows through to establish flue gas and return from the bypass flue Road；

(2) keeping the air-introduced machine is that power frequency mode is run, and gradually opens the damper up to standard-sized sheet, so that hot fume is slow The excessively described vertical tubular air preheater of slug flow, in this process, gas turbine control system will be in the bases for keeping steady load On plinth, big IGV angle is gradually opened；

(3) damper described in standard-sized sheet, while the bypass flue is closed, hot fume is all from the vertical tubular air preheat Device flows through, and the air-introduced machine is switched to conversion system from power frequency mode at this time, by adjusting hot fume flow come so that after heating Air themperature to maintain setting value constant.

Technical field

The present invention relates to the optimizations of Combined-cycle Gas Turbine Unit performance, and in particular, to a kind of using fume afterheat benefit With the system of skill upgrading Combined-cycle Gas Turbine Unit performance driving economy.

Background technique

Combined-cycle Gas Turbine Unit acts not only as regulating units and also has the ability for driving base load, especially For gas turbine cogeneration units, the method for operation is " electricity determining by heat ", generation load relative to regulating units more Stablize.And with the continuous increase of electric power machine kludge capacity, Gas Generator Set is difficult to hold under rated load and runs, in part Since its heat consumption rate is higher under load, unit performance driving economy is poor, especially under current peak regulation ancillary service Policy Background, Plant gas is faced with the pressure of further pressure drop unit generation load, so that unit economy further decreases.Moreover, for The longer Combined-cycle Gas Turbine Unit of production time, since residual heat boiler for exchanging heat device tube wall unavoidably has fouling Phenomenon causes exhaust gas temperature to rise, and waste heat boiler efficiency decline, combined cycle unit performance driving economy is deteriorated.Therefore, how to mention The runnability of high Combined-cycle Gas Turbine Unit at part load is a problem to be solved.

Gas compressor in gas turbine equipment is the air compression plant for rotating constant volume, and runnability is by environmental condition shadow Sound is larger.When environment temperature rises, atmospheric density declines therewith, and the air quality flow into compressor is caused to reduce.It is logical Normal pressure mechanism of qi import is equipped with adjustable guide vane, is changed by adjusting import adjustable guide vane angle (inlet guide vanes, IGV) Emptying throughput, to improve the economy of Combined-cycle Gas Turbine Unit at part load.When holding gas turbine power generation When load is constant, with being gradually increasing for environment temperature, blower outlet air themperature is gradually increasing, and compressor inlet is transducible Leaf angle will be gradually increased, and compressor inlet restriction loss reduces, and gas turbine operation rate of load condensate will be gradually increasing, combustion engine heat consumption Rate will decline therewith.

Utility model patent " air inlet temperature regulating device for air pressing unit of gas-fired " (patent No. ZL200520033435.2), " air heating mechanism (patent No. for gas turbine inlet air compressor entrance ZL201721358582.6) " there are following problems:

(1) when environment temperature is lower in winter, during gas turbine operation, inlet air heating is adjusted by regulating pondage When temperature after device, if water is inadequate；Or after the water inlet cutting of air intake heater, the water in air intake heater can freeze Air intake heater is split, heater pipes are damaged.Further damaged tubular may make water bring compressor into, will endanger combustion gas The safe operation of turbine.

(2) for the Combined-cycle Gas Turbine Unit gone into operation, waste heat boiler exhaust gas temperature is by exchanger tube wall knot The factors such as dirt influence, so that exhaust gas temperature rises, the decline of waste heat boiler heat transfer property.The prior art does not propose that effective method is come Exhaust gas temperature is further decreased, so that combined cycle unit economy promotion effect is unobvious.

Summary of the invention

The technical problem to be solved by the present invention is design a set of smoke waste heat utilization system, discharged fume using waste heat boiler more than Heat heats compressor inlet air themperature, promotes the rate of load condensate of gas turbine, further decreases waste heat boiler exhaust gas temperature, mention Rise the performance driving economy under combined cycle unit sub-load.

To achieve the goals above, the present invention provides a kind of UTILIZATION OF VESIDUAL HEAT IN system for promoting Gas Turbine Combined-cycle economy System, for promoting Combined-cycle Gas Turbine Unit part load performance, it includes:

One vertical tubular air preheater, the vertical tubular air preheater are arranged in gas turbine blower import, It exchanges heat for the inlet air to the gas turbine blower import, to improve the temperature of the inlet air；And

One is arranged in the main road flue between waste heat boiler and the vertical tubular air preheater, the main road flue packet An inlet air stack and an exhaust uptake are included, the low-level (stack-gas) economizer fume side inlet flue duct of waste heat boiler is arranged in the inlet air stack The fume afterheat of the waste heat boiler is passed into the vertical tubular sky between the vertical tubular air preheater import Air preheater, the exhaust uptake are arranged in the vertical tubular air preheater outlet and the waste heat boiler low-level (stack-gas) economizer The flue gas after vertical tubular air preheater heat exchange is sent to the waste heat boiler between fume side exhaust pass.

Further, described further includes a bypass flue, and the bypass flue is arranged in the inlet air stack and the exhaust The exhaust uptake is directly entered without the vertical tubular air preheater so that flue gas enters inlet air stack between flue And it is discharged from the low-level (stack-gas) economizer fume side exhaust pass.

Further, the inlet air stack is provided with an air intake control valve, the air intake control valve is used to adjust from described Inlet air stack enters the exhaust gas volumn of the vertical tubular air preheater.

Further, the air intake control valve can be gradually opened the bypass when progressively closing off the inlet air stack simultaneously Flue.

Further, the exhaust uptake is provided with a gas exhausting valve, the gas exhausting valve is used to adjust from described Bypass flue enters the exhaust gas volumn of the exhaust uptake.

Further, the gas exhausting valve can be gradually opened the bypass when progressively closing off the exhaust uptake simultaneously Flue.

Further, the air intake control valve is arranged in one end of the bypass flue and the low temperature of the waste heat boiler saves coal Between device fume side inlet flue duct, the other end is arranged in the gas exhausting valve and the waste heat boiler low-level (stack-gas) economizer fume side So that the air intake control valve and the gas exhaust inspecting valve regulation enter the exhaust from the inlet air stack between exhaust pass The exhaust gas volumn of flue.

Further, the air intake control valve uses an inlet air stack baffle, and the inlet air stack baffle is for adjusting hot cigarette Gas enters the flue gas ratio in the vertical tubular air preheater and the bypass flue, when opening the main road flue Then close the bypass flue.

Further, the gas exhausting valve uses an outlet damper, and the outlet damper is opening the master The bypass flue is then closed when the flue of road.

Further, an air-introduced machine is set in the main road flue, for controlling the flue gas flow in flue.

Further, first pressure measuring device and the first temperature measuring device are equipped on the inlet air stack.

Further, the first pressure measuring device is located at before the first temperature measuring device.

Further, second device for pressure measurement and second temperature measuring device are equipped on the exhaust uptake.

Further, the second device for pressure measurement is located at before second temperature measuring device.

Further, third device for pressure measurement and third temperature are provided in the gas turbine blower intake channel Measuring device is used to detect the pressure and temperature of the air after heat exchange.

Further, the third device for pressure measurement is located at before third temperature measuring device.

It further, further include first flow measuring device, it is located at the outlet damper and institute in main road flue It states between air-introduced machine.

Further, further include an operation controller, it with the inlet air stack baffle, it is the outlet damper, described Air-introduced machine is connected with the control system of the gas turbine, and the operation controller uses following working method:

(1) when needing to put into the system, damper is closed entirely, the air-introduced machine starts under power frequency mode, so that from The hot fume of the waste heat boiler low-level (stack-gas) economizer flue gas side-entrance extraction is all flowed through from the bypass flue to establish cigarette Air circuit；

(2) keeping the air-introduced machine is that power frequency mode is run, and gradually opens the damper up to standard-sized sheet, so that hot cigarette Gas slowly flows across the vertical tubular air preheater, and in this process, gas turbine control system will keep steady load On the basis of, gradually open big IGV angle；

(3) damper described in standard-sized sheet, while the bypass flue is closed, hot fume is all from the vertical tubular air Preheater flows through, and the air-introduced machine is switched to conversion system from power frequency mode at this time, by adjust hot fume flow come so that plus It is constant that air themperature after heat maintains setting value.

The beneficial effects of the present invention are:

(1) present invention is calmed the anger using the partial bypass flue gas of the waste heat boiler low-level (stack-gas) economizer import fume side to heat Machine inlet air, without being used as heat source medium using carbonated drink working medium, because of tubular air preheater when avoidable winter temperature is lower Inside there is water that heat exchange equipment is caused to damage and bring gas turbine operation safety issue.

(2) pressure is heated using the part low-grade flue gas extracted out from the waste heat boiler low-level (stack-gas) economizer import fume side Mechanism of qi inlet air realizes exhaust heat stepped utilization, can further decrease waste heat boiler exhaust gas temperature, improves waste heat boiler efficiency, Promote the performance driving economy of combined cycle unit.

(3) further, the air intake control valve and/or gas exhausting valve provided with bypass flue and flue, improve The flexibility for throwing/cutting smoke waste heat utilization system adjusts frequency and realizes to the Air Temperature after heating by the way that frequency converting induced draft fan is arranged The accurate control of degree, improves the flexibility of control.

Detailed description of the invention

Fig. 1 provides a kind of afterheat utilizing system for promoting Gas Turbine Combined-cycle economy for the present invention of the invention Structural schematic diagram.

Label declaration:

Waste heat boiler 100

Low-level (stack-gas) economizer 101

Gas turbine 200

Compressor 201

Air intake filter 202

Vertical tubular air preheater 1

Main road flue 2

Bypass flue 3

Inlet air stack 21

Exhaust uptake 22

Inlet air stack baffle 31

Outlet damper 32

Air-introduced machine 4

First pressure measuring device 51

First temperature measuring device 52

Second device for pressure measurement 61

Second temperature measuring device 62

Third device for pressure measurement 71

Third temperature measuring device 72

First flow measuring device 81

Specific embodiment

The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.It should be understood that described herein Specific embodiment be merely to illustrate and explain the present invention, be not intended to restrict the invention.

It can be solely the convenience of reader herein and used certain terms, and these terms are not considered as to this hair The limitation of bright range.For example, "upper", "lower", "left", "right", "front", "rear", " top ", " bottom ", "horizontal", " hang down Directly ", the wording of " upstream ", " downstream ", "front", "rear" etc. only describes to show construction in the accompanying drawings.Certainly, of the invention one One or more elements of embodiment can orient in any direction, and thus unless expressly stated otherwise, otherwise term is answered When being interpreted as including these variants.

Referring to attached drawing 1, a kind of afterheat utilizing system packet promoting Gas Turbine Combined-cycle economy provided by the invention Include vertical tubular air preheater 1, main road flue 2 and bypass flue 3.Vertical tubular air preheater 1 is arranged in gas turbine The import of 200 compressor 201, for the inlet air heat exchange to 201 import of gas turbine blower to improve import sky The temperature of gas.Main road flue 2 be arranged between waste heat boiler 100 and vertical tubular air preheater 1, main road flue 2 include into The flue gas side-entrance of the low-level (stack-gas) economizer 101 of waste heat boiler 100 is arranged in gas flue 21 and exhaust uptake 22, inlet air stack 21 Between 1 import of flue and vertical tubular air preheater, the fume afterheat of the waste heat boiler 100 is passed into vertical tubular sky Air preheater 1；The outlet of vertical tubular air preheater 1 and the low-level (stack-gas) economizer of waste heat boiler 100 is arranged in exhaust uptake 22 Between 101 fume side exhaust pass, the flue gas after vertical tubular air preheater 1 exchanges heat will be entered and send waste heat boiler to 100.Bypass flue 2 be arranged between inlet air stack 21 and the exhaust uptake 22 so as to flue gas enter inlet air stack 21 without Vertical tubular air preheater 1 is crossed to be directly entered exhaust uptake 22 and be discharged from 201 fume side exhaust pass of low-level (stack-gas) economizer.

Further, inlet air stack 21 is provided with an air intake control valve, the air intake control valve be used to adjust from it is described into Gas flue enters the exhaust gas volumn of the vertical tubular air preheater.Air intake control valve meeting when progressively closing off inlet air stack 21 It is gradually opened bypass flue 3 simultaneously.Air intake control valve uses inlet air stack baffle 31 in the present embodiment.The inlet air stack gear Plate 31 is for adjusting the flue gas ratio that hot fume enters in vertical tubular air preheater 1 and bypass flue 3.Wherein, it is beating The bypass flue 3 is then closed when opening main road flue 2.

Further, exhaust uptake 22 is provided with a gas exhausting valve, the gas exhausting valve is used to adjust from bypass cigarette Road 3 enters the exhaust gas volumn of exhaust uptake 22.The gas exhausting valve can be gradually opened side when progressively closing off exhaust uptake simultaneously Road flue 3.Gas exhausting valve uses outlet damper 32 in the present embodiment.Outlet damper 32 can further control into Enter the flue gas ratio of exhaust uptake 22.The exhaust uptake 22 of main road flue 2 is then closed when opening the bypass flue 3.

The flue gas of the low-level (stack-gas) economizer 101 of inlet air stack baffle 31 and waste heat boiler 100 is arranged in one end of bypass flue 3 Between side-entrance flue, the flue gas of the low-level (stack-gas) economizer 101 of outlet damper 32 and waste heat boiler 100 is arranged in the other end Between side outlet flue, so that inlet air stack baffle 31 and outlet damper 32 can be adjusted to enter from inlet air stack 21 and be vented The exhaust gas volumn of flue 22.

One air-introduced machine 4 is set in the main road flue, for controlling the flue gas flow in main road flue 2.In the implementation In example, air-introduced machine 4 is arranged in the exhaust uptake 22 of main road flue 2.Air-introduced machine can be run under power frequency or conversion system.

In addition, being equipped with first pressure measuring device 51 and the first temperature measuring device 52 on inlet air stack 21.First pressure Force measuring device 51 is located at before the first temperature measuring device 52.Second device for pressure measurement 61 is equipped on exhaust uptake 22 With second temperature measuring device 62.Second device for pressure measurement 61 is located at before second temperature measuring device 62.

Third device for pressure measurement 71 and third temperature are provided in the intake channel of the compressor 201 of gas turbine 200 Degree measuring device 72 is used to detect the pressure and temperature of the inlet air after heat exchange.Third device for pressure measurement 71 is located at third temperature It spends before measuring device 72.

First flow measuring device 81 is located in main road flue 2, between outlet damper 32 and air-introduced machine 4, uses To measure the flue gas flow of exhaust uptake 22.

It can be seen from the figure that inlet air stack baffle 31 and 32 design comparison of outlet damper of the invention is ingenious, lead to It crosses open proportional band realize that the flue gas ratio that can further control into exhaust uptake 22, structure are simple and real with can be convenient With.

It may also include an operation in a kind of afterheat utilizing system of promotion Gas Turbine Combined-cycle economy of the invention Controller, to further increase more than the afterheat utilizing system of promotion Gas Turbine Combined-cycle economy of the invention a kind of Efficiency of heating- utilization.The operation controller and inlet air stack baffle 31, outlet damper 32, air-introduced machine 4, gas turbine 200 Control system (not illustrating in figure) is connected, it uses following working method:

(1) when needing to put into the system, gas damper 31 and outlet damper 32 are put into entirely, air-introduced machine 4 is in work Start under frequency mode, so that the hot fume that the flue gas side-entrance of waste heat boiler low-level (stack-gas) economizer 101 is extracted out is all from bypass flue 3 It flows through to establish a flue gas circuit；

(2) keeping air-introduced machine 4 is that power frequency mode is run, and gradually opens inlet air stack baffle 31 and outlet damper 32, So that hot fume slowly flows across vertical tubular air preheater 1, in this process, the control system of gas turbine 200 will protected On the basis of holding steady load, big IGV angle is gradually opened；

(3) full admission damper 31 and outlet damper 32, at the same bypass flue 3 close, hot fume all from Vertical tubular air preheater 1 flows through, and air-introduced machine 4 is switched to conversion system from power frequency mode at this time, by adjusting hot fume stream Amount come so that the air themperature after heating to maintain setting value constant.

Referring back to Fig. 1, the flue gas side-entrance of tubular air preheater 1 passes through the inlet air stack of upper perforated plate and main road flue 2 21 are connected, and the flue gas in flue is extracted out from the import fume side of the low-level (stack-gas) economizer 101 of waste heat boiler 100, as heat exchanger Heat source fluid.The flue gas side outlet of vertical tubular air preheater 1 is connected by lower perforated plate with the exhaust uptake 22 of main road flue, Flue gas after heat exchange is flowed to the flue gas side outlet of the low-level (stack-gas) economizer 101 of waste heat boiler 100, is discharged into chimney together with smoke evacuation.

In one embodiment, it when needing to put into smoke waste heat utilization system of the invention, shuts entirely state flue first Baffle, air-introduced machine start under power frequency mode, and hot fume all passes through bypass flue 3 and constitutes circulation loop.When flue gas circuit is built After the completion of vertical, above-mentioned damper is gradually opened, so that hot fume gradually flows through vertical tubular air preheater 1, until flue Until baffle standard-sized sheet, hot fume all passes through vertical tubular air preheater 1 at this time.At this point, can by 4 method of operation of air-introduced machine from Power frequency is switched to frequency conversion, changes the hot fume flow extracted out from waste heat boiler 100 by adjusting frequency, realizes to empty after heating Temperature degree is precisely controlled.

The partial fume extracted out from the import fume side of the low-level (stack-gas) economizer 101 of waste heat boiler 100 is surveyed by first pressure Device 51 and the first temperature measuring device 52 are measured, measures the pressure and temperature for the hot fume extracted out from waste heat boiler 100 respectively, After heat is delivered heat to air by vertical tubular air preheater 1 by hot fume, air-introduced machine 4 is entered by main road flue 2 and is carried out Boosting is provided with second device for pressure measurement 61, second temperature measuring device 62 and first flow measurement dress before air-introduced machine 81 are set, for measuring temperature, pressure and the flow of the flue gas after exchanging heat.It is surveyed by first pressure measuring device 51 and second pressure Device 61 is measured, pressure drop of the hot fume in vertical tubular air preheater can be measured out, pass through the first temperature measuring device 52 With second temperature measuring device 62, it can be deduced that temperature drop of the hot fume in vertical tubular air preheater.

In addition, being equipped with third before 201 import air intake filter 202 of compressor, after vertical tubular air preheater 1 Device for pressure measurement 71 and third Temperature Quantity device 72.By the way that atmospheric pressure and 71 measured value of device for pressure measurement are compared Compared with, can learn pressure drop of the inlet air when flowing through vertical tubular air preheater 1, pass through third Temperature Quantity device 72 measure Temperature be compared with environment temperature, can learn the temperature rise situation of inlet air, with realize to fume afterheat of the invention Utilize the real-time monitoring of system heat exchange property.

In one embodiment, certain PG9351FA type Combined-cycle Gas Turbine Unit is established using Apros software to imitate True system, the 9F grades of gas turbine have carried out the advanced passage of heat (advanced gas path, AGP) upgrading.In spring or autumn Under season and winter condition and under gas turbine different load, combined cycle unit after smoke waste heat utilization system is thrown/is cut in calculating The situation of change of economy.

Experiment one

Spring or autumn operating condition, environmental parameter are as follows: 15.6 DEG C of environment temperature, atmospheric pressure 101.58kPa, relative humidity is 82%.Respectively in the case where gas turbine load is 240MW and 220MW, the front and rear combined circulation of smoke waste heat utilization system is thrown/is cut in calculating The economic comparison of unit, the results are shown in Table 1.

Smoke waste heat utilization system combined cycle unit performance comparison is thrown/cut to 1 spring of table or autumn

Experiment two

Winter condition, environmental parameter are as follows: 3.6 DEG C of environment temperature, atmospheric pressure 102.59kPa, relative humidity 78%.Point Not in the case where gas turbine load is 240MW and 220MW, the front and rear combined Cycle Unit of smoke waste heat utilization system is thrown/is cut in calculating Economic comparison, the results are shown in Table 2.

Smoke waste heat utilization system combined cycle unit performance comparison is thrown/cut to 2 winter of table

From above-mentioned table 1,2 as can be seen that after smoke waste heat utilization system of the invention, 201 inlet air temperature of compressor 4.3~5.8 DEG C can be risen, 100 exhaust gas temperature of waste heat boiler declines 3.8~5.8 DEG C, and 100 efficiency of waste heat boiler can rise about 1%, combustion engine heat consumption rate declines 34.2~85.8kJ/ (kWh), and combined cycle heat consumption rate can decline 33.9~70.9kJ/ (kW H), being converted into gross coal consumption rate is 1.16~2.42 g/ (kWh).Although putting into the smoke waste heat utilization system will increase factory Power consumption rate, but from the point of view of calculating analysis, the influence to station service power consumption rate only makes station service power consumption rate increase about 0.10%.It is imitated from comprehensive From the point of view of fruit, using smoke waste heat utilization system of the invention, Combined-cycle Gas Turbine Unit can be promoted well in part The performance driving economy of load, so the present invention has the significant technological progress of substantive features.

Finally it is noted that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng It is described the invention in detail according to embodiment, those skilled in the art should understand that, to technical side of the invention Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention Scope of the claims in.