CN107923608B - Cogeneration systems - Google Patents

Cogeneration systems Download PDF

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Publication number
CN107923608B
CN107923608B CN201680046813.1A CN201680046813A CN107923608B CN 107923608 B CN107923608 B CN 107923608B CN 201680046813 A CN201680046813 A CN 201680046813A CN 107923608 B CN107923608 B CN 107923608B
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CN
China
Prior art keywords
heat
exhaust gas
heat exchanger
temperature
medium oil
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CN201680046813.1A
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Chinese (zh)
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CN107923608A (en
Inventor
藤原雅树
松寺直树
渡会毅
伊藤隆行
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Mitsubishi Heavy Industries Environmental Engineering Co Ltd
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Mitsubishi Heavy Industries Environmental Engineering Co Ltd
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Priority to JP2015251539A priority Critical patent/JP6210241B2/en
Priority to JP2015-251539 priority
Application filed by Mitsubishi Heavy Industries Environmental Engineering Co Ltd filed Critical Mitsubishi Heavy Industries Environmental Engineering Co Ltd
Priority to PCT/JP2016/088047 priority patent/WO2017110848A1/en
Publication of CN107923608A publication Critical patent/CN107923608A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22BMETHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00Methods of steam generation characterised by form of heating method
    • F22B1/02Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00Arrangements of devices for treating smoke or fumes
    • F23J15/06Arrangements of devices for treating smoke or fumes of coolers
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/04Control effected upon non-electric prime mover and dependent upon electric output value of the generator
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23JREMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2900/00Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
    • F23J2900/15004Preventing plume emission at chimney outlet
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/30Technologies for a more efficient combustion or heat usage

Abstract

The present invention provides cogeneration systems (1), includes incinerator (2);For the offgas line (5) for exhaust gas (EG) circulation being discharged from incinerator (2);The power generator (3) that heat medium oil (HO) is generated electricity as heat source;The first heat exchanger (6) of heat exchange is carried out with the heat medium oil (HO) supplied to power generator (3) to exhaust gas (EG);The air preheater (7) of heat exchange is arranged side by side and carried out to exhaust gas (EG) with the air (A1) supplied to incinerator with first heat exchanger (6) in offgas line (5);From the dust collect plant (14) for carrying out removal solid component in the exhaust gas (EG) after heat exchange by first heat exchanger (6) and air preheater (7);And in setting in offgas line (5) in the upstream side of dust collect plant (14) and in the second heat exchanger (8) for being carried out carrying out heat exchange between the exhaust gas (EG) after heat exchange and the heat medium oil (HO) supplied to first heat exchanger (6) from first heat exchanger (6) and air preheater (7).

Description

Cogeneration systems
Technical field
The present invention relates to the cogeneration systems for using the waste heat of incinerator to generate electricity.
The application CLAIM OF PRIORITY based on Japanese Patent Application 2015-251539 filed on December 24th, 2015, and This quotes its content.
Background technique
In the sludge incineration unit handled sludge such as downflow sludges, the waste heat opposite direction incinerator of incinerator is utilized The combustion air of supply is preheated, or is generated electricity using the steam generated by the boiler of recycling waste heat.As a result, in sludge It burns in unit, improves the hot effective rate of utilization of unit entirety (referring for example to patent document 1.).
In such sludge incineration unit, it is usually provided with the collection for carrying out the dust processing for the exhaust gas being discharged from incinerator Dirt device.In such sludge incineration unit, the heat resisting temperature based on dust collect plant carries out the exhaust gas flowed into dust collect plant Temperature adjustment.In the past, it was sprayed water in the way of misty by the exhaust gas that exhaust gas cooling tower opposite direction dust collect plant imports, by temperature tune It is whole to for example, about 200 DEG C.
Citation
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2013-155974 bulletin
Summary of the invention
Subject to be solved by the invention
It is not preferably however, finally dissipate heat being sprayed water in a manner of misty when carrying out temperature adjustment to exhaust gas 's.In addition, also can be by making air etc. carry out temperature control and mixing with the exhaust gas imported to dust collect plant.However, at this In method, in the same manner as exhaust gas cooling tower, heat finally is dissipated, is undesirable.In addition, it is necessary to which the air of large capacity, is Being significantly increased for reply gas flow, needs to increase place capacity.
There is also setting gas regenerative air heaters to carry out temperature controlled method, but have gas regenerative air heater Heat-transfer pipe easily become low-temperature corrosion region such problems.
It is an object of the present invention to provide one kind in the cogeneration systems that the waste heat using incinerator generates electricity The hot higher cogeneration systems of effective rate of utilization.
Solution
First method according to the present invention, cogeneration systems include incinerator;Offgas line is supplied from the incinerator The exhaust gas of discharge circulates;Power generator generates electricity heat medium oil as heat source;First heat exchanger, to the exhaust gas Heat exchange is carried out with the heat medium oil supplied to the power generator;Air preheater, with described first in the offgas line Heat exchanger is arranged side by side, and carries out heat exchange with the air supplied to the incinerator to the exhaust gas;Dust collect plant, from It is carried out removing solid component in the exhaust gas after heat exchange by the first heat exchanger and the air preheater;And the The upstream side of the dust collect plant is arranged in two heat exchangers in the offgas line, and by the first heat exchanger And the air preheater carry out the exhaust gas after heat exchange and the heat medium oil that is supplied to the first heat exchanger it Between carry out heat exchange.
According to this structure, the temperature of the exhaust gas imported to dust collect plant is reduced by using second heat exchanger, Compared with the case where for example reducing the temperature of exhaust gas using exhaust gas cooling tower, heat can be more efficiently utilized.
In above-mentioned cogeneration systems, it is also possible to have control device, which is based on from second heat The temperature of the exhaust gas of exchanger discharge, to adjust the flow for the heat medium oil for carrying out heat exchange by the second heat exchanger.
According to this structure, the temperature of exhaust gas is adjusted by adjusting the flow of heat medium oil, can make the temperature of exhaust gas As temperature corresponding with the heat resisting temperature of dust collect plant.
In above-mentioned cogeneration systems, be also possible to have: heat-carrying oil circulation path is recycled for heat medium oil;And Bypass path, by the upstream side of the second heat exchanger and the second heat exchanger in the heat-carrying oil circulation path Downstream side by around connecting in a manner of the second heat exchanger, the control device in the bypass path to flowing The flow of heat medium oil is adjusted.
It is adjusted by the flow using the heat medium oil imported to the second heat exchanger for the upstream side for being configured at dust collect plant The temperature of the whole exhaust gas flowed into dust collect plant, can more promptly adjust the temperature of exhaust gas.
In above-mentioned cogeneration systems, it is also possible to based on by the institute after first heat exchanger progress heat exchange The temperature of heat medium oil is stated, to adjust the flow velocity of the heat medium oil supplied to the power generator.
According to this structure, the temperature of heat medium oil can be adjusted to the temperature suitable for power generator.In addition, can answer The temperature of exhaust gas in the case that the temperature (heat) for the exhaust gas being discharged from incinerator is significantly increased rises.In addition, can answer The temperature of exhaust gas in the case that the temperature (heat) for the exhaust gas being discharged from incinerator is greatly decreased reduces.
In above-mentioned cogeneration systems, it is also possible to have anti-white cigarette device, which utilizes from second heat Exchanger is discharged and passes through the exhaust gas after the dust collect plant and heats to outside air, and by the exhaust gas and described Outside air is supplied to chimney.
According to this structure, with for example in the case where anti-white cigarette device is arranged on the upstream side than second heat exchanger compared with, Heat is recycled from the exhaust gas of low temperature, therefore, can be improved the heat recovery rate of system entirety.
Invention effect
According to the present invention, the temperature that the exhaust gas imported to dust collect plant is reduced by using second heat exchanger, with example The temperature that exhaust gas is such as reduced using exhaust gas cooling tower is compared, and heat can be more efficiently utilized.
Detailed description of the invention
Fig. 1 is the system diagram of the sludge incineration unit of embodiments of the present invention.
Fig. 2 is the flow chart that the first control method of the sludge incineration unit to embodiments of the present invention is illustrated.
Fig. 3 is the flow chart that the second control method of the sludge incineration unit to embodiments of the present invention is illustrated.
Specific embodiment
Hereinafter, being carried out in detail referring to cogeneration systems, that is, sludge incineration unit 1 of the attached drawing to embodiments of the present invention Explanation.
As shown in Figure 1, the sludge incineration unit 1 of present embodiment has: being burnt to what the sludge such as downflow sludge S was burned Burn furnace 2;The power generator 3 to be generated electricity using the waste heat (burning heat) for the exhaust gas EG being discharged from incinerator 2;And control device 4.The sludge incineration unit 1 of present embodiment is to carry out burning disposal to sludge S and recycle the heat generated with burning to come The cogeneration systems to generate electricity.Power generator 3 uses the heat medium oil HO recycled in the unit as thermophore.
Sludge incineration unit 1 has: being imported into the offgas line 5 for the exhaust gas EG being discharged from incinerator 2;It is arranged in offgas line 5 On first heat exchanger 6;The air preheater 7 being arranged side by side in offgas line 5 with first heat exchanger 6;It is arranged first The second heat exchanger 8 in the downstream side of heat exchanger 6 and air preheater 7;And the downstream side of second heat exchanger 8 is set Emission-control equipment 9.
It can also be arranged in the upstream side of incinerator 2 and the sludge that sludge, that is, dewatered sludge comprising moisture is dried is done Dry machine.Sludge drier is the dewatered sludge (dewatered cake, such as aqueous for making the volume reduction chemical industry skill by being concentrated, being dehydrated and importing Rate is device that is 72%) dry and generating dry sludge (such as moisture content 50%).
First heat exchanger 6 and second heat exchanger 8 are supplied with to power generator 3 the exhaust gas EG being discharged from incinerator 2 The heat medium oil HO given carries out the heat exchanger of heat exchange (heating).Air preheater 7 be to the exhaust gas EG that is discharged from incinerator 2 with The combustion air A1 supplied to incinerator 2 carries out the heat exchanger of heat exchange (preheating).
Emission-control equipment 9 includes the dust collect plant that dust processing is carried out from exhaust gas EG removal solid component (ash etc.) 14 (belt filters);Anti- white cigarette device 15;It contacts exhaust gas EG with cleaning solution and carries out (the exhaust gas cleaning of innoxious gas cleaner 16 Device);And by treated chimney 17 that exhaust gas EG releases to atmosphere.
The ring-type that power generator 3 has power generator main body 11 and imports heat medium oil HO to power generator main body 11 Heat source system, that is, heat-carrying oil circulation path 12 (being shown in Fig. 1 using double dot dash line).Heat-carrying oil circulation path 12 is to make heat-carrying The path that oily HO is recycled between power generator main body 11 and first heat exchanger 6 and second heat exchanger 8.Heat medium oil HO is being carried It is flowed in one direction in hot-oil circulation path 12.
Incinerator 2 is the equipment for burning it and sludge S is stirred, is mixed in temperature flowing bed.It burns Furnace 2 is the burning facility for waste being burned and being discharged the exhaust gas EG of high temperature.As incinerator 2, gas can be used Alveolitoid flows the burning facilities such as furnace, circular form flowing furnace.
Combustion air A1 (flowing sky is imported to incinerator 2 via combustion air line 13 (showing in Fig. 1 using single dotted broken line) Gas).Exhaust gas EG is discharged from incinerator 2 via the first offgas line 5a.The temperature for the exhaust gas EG being discharged from incinerator 2 is for example 850℃。
First offgas line 5a branches into two second offgas line 5b (5b1,5b2) arranged side by side in downstream side.One side's Second offgas line 5b1 is connect with first heat exchanger 6.First heat exchanger 6 is arranged on heat-carrying oil circulation path 12 and second On offgas line 5b1.First heat exchanger 6 is carried out as the heat of the exhaust gas EG to the high temperature flowed in the second offgas line 5b1 It recycles and heats the heating device of heat medium oil HO and function.
The second offgas line 5b2 of another party is connect with air preheater 7.Air preheater 7 is in the second offgas line 5b2 The heat of the exhaust gas EG of the high temperature of middle flowing is recycled and heats the combustion air that (preheating) is flowed in combustion air line 13 The heat exchanger of A1.
First heat exchanger 6 and air preheater 7 are arranged side by side in offgas line 5.
Two second offgas line 5b collaborate in the downstream side of first heat exchanger 6 and air preheater 7.Two second exhaust gas Line 5b is connect with third offgas line 5c.The downstream side of first heat exchanger 6 and air preheater 7 is arranged in second heat exchanger 8 That is on third offgas line 5c.After second heat exchanger 8 is used as to heat exchange is carried out by first heat exchanger 6 and air preheater 7 The heat of exhaust gas EG recycled and heat the heating device of heat medium oil HO and function.
Then, for coal dust, SO contained by the exhaust gas EG that will be discharged from incinerator 22, the removal such as HCl and to become cleaning useless The emission-control equipment 9 of gas is illustrated.
The dust collect plant 14 for being set to the downstream side of second heat exchanger 8 is using filter cloth with heat resistance etc. and to useless The solid components such as coal dust, ash in gas EG are filtered the device of capture.That is, from being discharged from second heat exchanger 8 and via the Four offgas line 5d imported into the exhaust gas EG of dust collect plant 14 and remove coal dust etc..
In dust collect plant 14, for imported exhaust gas EG temperature and be set with heat resisting temperature.Dust collect plant 14 Heat resisting temperature is, for example, 220 DEG C.
The anti-white cigarette device 15 that the downstream side of dust collect plant 14 is set in offgas line 5 is the white cigarette for preventing exhaust gas EG Device.Anti- white cigarette device 15 has: sucking air A2 and the air sent out supply fan 19;Make useless via the 5th from dust collect plant 14 Heat exchange is carried out between the exhaust gas EG and air A2 that gas line 5e is imported, and air A2 is heated and becomes and mixes with air A3's Air heater 20;And mixing is oriented to the mixing air line 21 of chimney 17 with air A3.
As the air heater 20 of anti-white cigarette device 15, such as shell and tube heat exchanger can be used.Air heater 20 Heat-transfer pipe for example by Teflon (registered trademark) resistant material cover.In other words, it is connect in the exhaust gas of air heater 20 Contacting surface is formed with the anti-corrosion layer formed by Teflon.That is, the air heater 20 of present embodiment has low-temperature corrosion protection erosion type Heat-transfer pipe.
Thereby, it is possible to inhibit the corrosion of the metal surface of heat-transfer pipe, low-temperature corrosion is prevented.For becoming anti-white cigarette device 15 The processing of low-temperature corrosion protection erosion type is not limited to above-mentioned Teflon, such as can also be using nonmetallic materials such as resins.In addition, Heat-transfer pipe itself can be formed by resistant materials such as ceramics.
Gas cleaner 16 is to make to be discharged from anti-white cigarette device 15 and via the 6th offgas line 5f exhaust gas EG imported and water, caustic soda The cleaning solutions such as aqueous solution contact and carry out innoxious exhaust gas cleaning device.
Exhaust gas EG in offgas line 5 is discharged by air-introduced machine attraction (not shown) via chimney 17.
In the 4th offgas line 5d for connecting second heat exchanger 8 with dust collect plant 14 of offgas line 5, be provided with to The exhaust gas temperature measurement device 18 that the temperature of the exhaust gas EG flowed in 4th offgas line 5d is measured.Exhaust gas temperature measurement device The temperature for the exhaust gas EG that 18 opposite dust collect plants 14 flow into is measured.The exhaust gas EG measured by exhaust gas temperature measurement device 18 Temperature to control device 4 send.
Then, the detailed content of the power generator of present embodiment 3 is illustrated.
Power generator main body 11 is made using the waste heat of incinerator 2 is heated to organic working media M as heat source It is evaporated, and using the steam make steamturbine 23 rotate and so-called binary (binery) cogeneration systems for generating electricity (organic rankine cycle cogeneration systems).
The power generator main body 11 of present embodiment include using via heat-carrying oil circulation path 12 to power generator main body The heat of the heat medium oil HO of 11 supplies is heated to organic working media M and is made the evaporator 22 of its evaporation;Utilize organic work Make the steamturbine 23 that the steam of medium M is rotated;The generator 24 directly linked with steamturbine 23;And make from steam The condenser 25 for organic working media M condensation that turbine 23 imports.
Heat-carrying oil circulation path 12 be the heat of the exhaust gas EG flowed in third offgas line 5c is recycled and to The path that the heat of the exhaust gas EG flowed in second offgas line 5b1 is recycled.
Heat-carrying oil circulation path 12 includes the first circulation road for connecting power generator main body 11 with second heat exchanger 8 Diameter 12a;The second circulation path 12b that second heat exchanger 8 is connect with first heat exchanger 6;And by first heat exchanger 6 The third circulating path 12c being connect with power generator main body 11.
Heat medium oil HO after heating in power generator main body 11 to organic working media M is according to second heat exchanger 8, the sequence circulation of first heat exchanger 6.First heat exchanger 6 is set to second heat exchanger in heat-carrying oil circulation path 12 8 downstream side.
It is flowed in third offgas line 5c via the heat medium oil HO that first circulation path 12a imported into second heat exchanger 8 Dynamic exhaust gas EG heating.The heat medium oil HO of first heat exchanger 6 is imported by the second offgas line via second circulation path 12b The exhaust gas EG heating flowed in 5b1.Heat medium oil HO after being heated by second heat exchanger 8 and first heat exchanger 6 is via third Circulating path 12c is imported to the evaporator 22 of power generator main body 11.
The first circulation path 12a of upstream side in second heat exchanger 8 and the downstream side for being in second heat exchanger 8 Second circulation path 12b using bypass path 27b around second heat exchanger 8 and be directly connected.That is, on first circulation road A part of the heat medium oil HO flowed in diameter 12a does not import to second heat exchanger 8 and imported into bypass path 27b.
It is arranged between the branch point 28 and second heat exchanger 8 for being set to the bypass path 27b of first circulation path 12a The first flow adjustment valve 29 for thering is the flow to heat medium oil HO to be adjusted.It is provided in bypass path 27b to heat medium oil HO's The second flow that flow is adjusted adjusts valve 30.
On the 12a of first circulation path and the upstream side of branch point 28, it is provided with and is flowed in heat-carrying oil circulation path 12 The heat-carrying oil pump 31 that the flow of dynamic heat medium oil HO is adjusted.Heat-carrying oil pump 31 is for supplying to heat-carrying oil circulation path 12 The pump of heat medium oil HO.Heat-carrying oil pump 31 utilizes discharge damper or change-over switch (inverter) to the stream of the heat medium oil HO of discharge Amount is controlled.
First flow adjustment valve 29, second flow adjustment valve 30 and heat-carrying oil pump 31 are controlled by control device 4.
As the heat medium oil HO that will be flowed in the main path 27a of 28 downstream of branch point than first circulation path 12a Flow when being set as O1, the flow of the heat medium oil HO flowed in bypass path 27b being set as O2, control device 4 usually at Mode for O1: O2=4: 1 degree adjusts valve 29 to first flow and second flow adjusts valve 30 and controls.That is, control Device 4 is so that the flow of the heat medium oil HO flowed in the main path 27a as mainstream is flowed far more than in bypass path 27b Heat medium oil HO flow mode to first flow adjust valve 29 and second flow adjustment valve 30 control.
In the third circulating path for connecting first heat exchanger 6 with power generator main body 11 of heat-carrying oil circulation path 12 In 12c, it is provided with the heat medium oil temperature measuring being measured to the temperature of the heat medium oil HO flowed in third circulating path 12c Device 32.The temperature for the heat medium oil HO that the opposite power generator main body 11 of heat medium oil temperature measuring apparatus 32 imports is measured.By The temperature for the heat medium oil HO that heat medium oil temperature measuring apparatus 32 determines is sent to control device 4.
The control device 4 of present embodiment has the temperature based on the exhaust gas EG determined by exhaust gas temperature measurement device 18 And the function that the flow for the heat medium oil HO that opposite second heat exchanger 8 imports is adjusted.
Control device 4 the temperature of exhaust gas EG be greater than set first threshold (such as 220 DEG C) in the case where so that The flow of the heat medium oil HO flowed in the main path 27a (downstream side of branch point 28) of first circulation path 12a becomes more modes Valve 29 is adjusted to first flow and second flow adjustment valve 30 controls.Specifically, control device 4 is so that in bypass path The mode that the flow of the heat medium oil HO flowed in 27b tails off operates second flow adjustment valve 30, and so that in main road The mode that the flow of the heat medium oil HO flowed in diameter 27a becomes more operates first flow adjustment valve 29.
At this point, the flow of the heat medium oil HO of 12 entirety of heat-carrying oil circulation path is constant.That is, not changing in heat medium oil the circulation path The flow of the heat medium oil HO flowed in the entirety of diameter 12 and can increase to second heat exchanger 8 supply heat medium oil HO stream Amount.The heat exchange amount in second heat exchanger 8 rises as a result, the temperature decline of exhaust gas EG.
In addition, control device 4 have the temperature based on the heat medium oil HO determined by heat medium oil temperature measuring apparatus 32 and The function that the flow velocity of the heat medium oil HO flowed in the entirety of heat-carrying oil circulation path 12 is adjusted.
Control device 4 the temperature of heat medium oil HO be greater than set second threshold (such as 280 DEG C) in the case where so that The increased mode of the flow velocity of the heat medium oil HO flowed in the entirety of heat-carrying oil circulation path 12 controls heat-carrying oil pump 31.
Increased by the flow velocity of the whole heat medium oil HO of heat-carrying oil circulation path 12, to reduce the temperature of heat medium oil HO.
Then, the movement of the sludge incineration unit 1 of present embodiment is illustrated.
Sludge S is put to incinerator 2 and burns.It is hot first with the exhaust gas EG (such as 850 DEG C) for burning and generating It is used as the heating source of heat medium oil HO in exchanger 6.In addition, exhaust gas EG is used as the heating of combustion air A1 in air preheater 7 Source
The temperature for having passed through the exhaust gas EG of first heat exchanger 6 and air preheater 7 is reduced to such as 300 DEG C.That is, exhaust gas EG is from 850 DEG C of rapid coolings to 300 DEG C.
Then, exhaust gas EG is used as the heating source of thermophore in second heat exchanger 8.Second heat exchanger 8 is passed through The temperature of exhaust gas EG is reduced to 220 DEG C.That is, the temperature of exhaust gas EG is reduced to and carrying out heat exchange in second heat exchanger 8 The heat resisting temperature of dust collect plant 14.It is imported by the exhaust gas EG after second heat exchanger 8 to dust collect plant 14.
Implement dust processing to the importing of dust collect plant 14 by the exhaust gas EG of second heat exchanger 8.
The exhaust gas EG being discharged from dust collect plant 14 supplies fan in the air heater 20 of anti-white cigarette device 15 and by air The air A2 of 19 supplies carries out heat exchange, increase the temperature of air A2.The temperature of air A2 rises to such as 150 DEG C.Pass through The mixing of air heater 20 is imported via mixing air line 21 to chimney 17 with air A3.
It is carried out by the exhaust gas EG of anti-white cigarette device 15 to the importing of gas cleaner 16 innoxious.The temperature of exhaust gas EG is in net gas Desuperheat is to such as 40 DEG C in device 16.Pass through the exhaust gas EG of gas cleaner 16 to import to chimney 17, and via mixing with air line 21 The mixing of the high temperature of importing is mixed with air A3.By the way that the mixing of exhaust gas EG and anti-white cigarette air A3 are mixed, Neng Goufang Only white cigarette is generated from chimney 17.
Then, the movement of power generator 3 is illustrated.
The heat medium oil HO recycled in heat-carrying oil circulation path 12 passes through in second heat exchanger 8 and first heat exchanger 6 In with exhaust gas EG carry out heat exchange and be warming up to such as 280 DEG C.Heat medium oil HO after heating is used for power generator main body 11 Organic working media M in evaporator 22 is heated.Organic working media M becomes steam in evaporator 22, and is imported into Generator 24 is driven to steamturbine 23.It is cooled and cold in condenser 25 in the steam that steamturbine 23 is discharged It is solidifying.Condensed organic working media M returns to evaporator 22.
Then, the control method of the sludge incineration unit 1 of present embodiment is illustrated.The sludge of present embodiment is burnt The control method of burning unit 1 includes: the first control method that the temperature for the exhaust gas EG that opposite dust collect plant 14 imports is adjusted; And the second control method that the temperature of the heat medium oil HO of opposite 11 importing of power generator main body is adjusted.
First control method is that the flow for the heat medium oil HO that opposite second heat exchanger 8 imports is controlled to adjust to collection The control method of the temperature for the exhaust gas EG that dirt device 14 imports.
First control method includes: to determine whether the temperature for the exhaust gas EG being discharged from second heat exchanger 8 is greater than the first threshold The exhaust gas temperature judgment process P11 of value;And it is greater than first threshold in the temperature of the exhaust gas EG imported to second heat exchanger 8 In the case of, increase the increased main road run-off of the flow of the heat medium oil HO flowed in the main path 27a of first circulation path 12a Process sequence P12.
In exhaust gas temperature judgment process P11, control device 4 is referring to the exhaust gas EG sent from exhaust gas temperature measurement device 18 Temperature.Control device 4 determines whether the temperature of exhaust gas EG is greater than first threshold (such as 220 DEG C).It is in the temperature of exhaust gas EG In 220 DEG C of situations below, control device 4 does not change the aperture of valve 29,30.
In the case where the temperature of exhaust gas EG is greater than 220 DEG C, control device 4 executes main road run-off and increases process P12.? Main road run-off increases in process P12, and control device 4 is adjusted the aperture of valve 29,30, makes to flow in main path 27a Heat medium oil HO flow increase.The heat exchange amount between exhaust gas EG and heat medium oil HO increases as a result, the temperature drop of exhaust gas EG It is low.
On the other hand, in the case where the temperature of exhaust gas EG is low, control device 4, which also can be implemented, adjusts valve to first flow 29 and the aperture of second flow adjustment valve 30 could be adjusted to reduce the control of the flow of the heat medium oil HO flowed in main path 27a System.
Second control method is controlled the flow of the heat medium oil HO flowed in 12 entirety of heat-carrying oil circulation path Come adjust to power generator main body 11 import heat medium oil HO flow velocity control method.
Second control method includes: to determine whether the temperature for the heat medium oil HO being discharged from first heat exchanger 6 is greater than second The heat-carrying oil temperature judgment process P21 of threshold value;And in the case where the temperature of heat medium oil HO is greater than second threshold, make in heat-carrying The increased heat-carrying oil stream amount of the flow velocity of the heat medium oil HO flowed in 12 entirety of oil circulation path increases process P22.
In heat-carrying oil temperature judgment process P21, control device 4 is referring to the load sent from heat medium oil temperature measuring apparatus 32 The temperature of hot oil HO.Control device 4 determines whether the temperature of heat medium oil HO is greater than second threshold (such as 280 DEG C).In heat medium oil The temperature of HO is in 280 DEG C of situations below, and control device 4 does not change the delivery flow of heat-carrying oil pump 31.
In the case where the temperature for the heat medium oil HO being discharged from first heat exchanger 6 is greater than 280 DEG C, control device 4 is executed Heat-carrying oil stream amount increases process P22.Increase in process P22 in heat-carrying oil stream amount, discharge stream of the control device 4 to heat-carrying oil pump 31 Amount is adjusted, and increases the flow velocity of the heat medium oil HO flowed in 12 entirety of heat-carrying oil circulation path.As a result, to power generator The temperature for the heat medium oil HO that main body 11 imports reduces.
On the other hand, in the case where the temperature of heat medium oil HO is low, control device 4 also be can be implemented to heat-carrying oil pump 31 Delivery flow could be adjusted to reduce the control of the flow velocity of heat medium oil HO.
According to above embodiment, the exhaust gas EG imported to dust collect plant 14 is reduced by using second heat exchanger 8 Temperature can more efficiently utilize heat compared with the case where for example reducing the temperature of exhaust gas using exhaust gas cooling tower.
In addition, being handed over by being adjusted based on the temperature of the exhaust gas EG determined by exhaust gas temperature measurement device 18 to the second heat The flow for the heat medium oil HO that parallel operation 8 imports can make the temperature of exhaust gas EG become corresponding with the heat resisting temperature of dust collect plant 14 Temperature.
In addition, by utilizing the heat medium oil HO imported to the second heat exchanger 8 for the upstream side for being configured at dust collect plant 14 Flow come adjust to dust collect plant 14 flow into exhaust gas EG temperature, can more promptly adjust the temperature of exhaust gas EG.
In addition, by being adjusted based on the temperature of the heat medium oil HO after heat exchange is carried out by first heat exchanger 6 to power generation The temperature of heat medium oil HO can be adjusted to the temperature suitable for power generator 3 by the flow velocity for the heat medium oil HO that apparatus main body 11 supplies. In addition, cope with from incinerator 2 be discharged exhaust gas EG temperature (heat) be significantly increased in the case where exhaust gas EG temperature Rise.In addition, cope with from incinerator be discharged exhaust gas temperature (heat) be greatly decreased in the case where exhaust gas temperature It reduces.
In addition, by have using after being heated by the exhaust gas EG after dust collect plant 14 to outside air to chimney 17 Supply anti-white cigarette device 15, with for example in the case where anti-white cigarette device is arranged on the upstream side than second heat exchanger 8 compared with, Neng Goucong Therefore the exhaust gas EG recycling heat of low temperature can be improved the heat recovery rate of system entirety.
In addition, by the way that anti-white cigarette device 15 is set as low-temperature corrosion protection erosion type, even if being 200 DEG C below useless to such as temperature In the case that the heat of gas EG is recycled, anti-white cigarette device 15 can also prevent sulphur (S) ingredient or chlorine (C1) ingredient because of sludge Caused by metal low-temperature corrosion.
In addition, heat medium oil HO is used as in the thermophore used in waste heat source, that is, exhaust gas EG recuperation of heat, by This can be realized simplification, the miniaturization of unit compared with the situation for using steam etc. in recuperation of heat.
In addition, by using binary cogeneration systems as power generator 3, even if unit small scale (for example, dirty Mud treating capacity 100t/ days) in the case where, power generation can also be effectively performed.
More than, embodiments of the present invention are illustrated in detail, but in the model for not departing from technical idea of the invention It can be subject to various changes in enclosing.
For example, also can be omitted anti-white cigarette device 15 in the case where the cigarette being discharged from chimney 17 may be white cigarette.
In addition, control device 4 also may be performed simultaneously the first control method and the second control method.It is useless by controlling simultaneously Temperature degree and heat-carrying temperature can accelerate mutual responsiveness using synergistic effect, as a result, can accelerate convergent Speed.
Description of symbols:
1 sludge incineration unit (cogeneration systems);
2 incinerators;
3 power generator;
4 control devices;
5 offgas lines;
6 first heat exchangers;
7 air preheaters;
8 second heat exchangers;
9 emission-control equipments;
11 power generator main bodys;
12 heat-carrying oil circulation paths;
12a first circulation path;
12b second circulation path;
12c third circulating path;
13 combustion air lines;
14 dust collect plants;
15 anti-white cigarette devices;
16 gas cleaners;
17 chimneys;
18 exhaust gas temperature measurement devices;
19 air supply fan;
20 air heaters;
Air line is used in 21 mixing;
22 evaporators;
23 steamturbines;
24 generators;
25 condensers;
27a main path;
27b bypass path;
28 branch points;
29 first flows adjust valve;
30 second flows adjust valve;
31 heat-carrying oil pumps;
32 heat medium oil temperature measuring apparatus;
A1 combustion air;
A2 air;
EG exhaust gas;
HO heat medium oil;
The organic working media of M;
S sludge.

Claims (3)

1. a kind of cogeneration systems, wherein
The cogeneration systems include
Incinerator;
Offgas line, for the exhaust gas circulation being discharged from the incinerator;
Power generator generates electricity heat medium oil as heat source;
First heat exchanger carries out heat exchange with the heat medium oil supplied to the power generator to the exhaust gas;
Air preheater is arranged side by side in the offgas line with the first heat exchanger, and to the exhaust gas with to institute The air for stating incinerator supply carries out heat exchange;
Dust collect plant carries out in the exhaust gas after heat exchange from by the first heat exchanger and the air preheater Except solid component;
The upstream side of the dust collect plant is arranged in second heat exchanger in the offgas line, and by first heat Exchanger and the air preheater carry out the exhaust gas after heat exchange and the load to first heat exchanger supply Heat exchange is carried out between hot oil;
Control device, based on the temperature for the exhaust gas being discharged from the second heat exchanger, to adjust by second heat Exchanger carries out the flow of the heat medium oil of heat exchange, also, based on as described in after first heat exchanger progress heat exchange The temperature of heat medium oil, to adjust the flow velocity of the heat medium oil supplied to the power generator;
Heat-carrying oil circulation path comprising the main path and bypass path of the second heat exchanger are set, for the heat-carrying Oil is successively recycled in the power generator, the second heat exchanger, the first heat exchanger;
Exhaust gas temperature measurement device is measured the temperature for the exhaust gas being discharged from the second heat exchanger;And
Heat medium oil temperature measuring apparatus, to by the first heat exchanger carry out heat exchange after the heat medium oil temperature into Row measurement,
The control device becomes larger than in the temperature of the exhaust gas determined by the exhaust gas temperature measurement device and sets in advance In the case where the first threshold set, make the flow of the heat medium oil flowed in the main path of the heat-carrying oil circulation path Increase, becomes larger than pre-set the in the temperature of the heat medium oil determined by the heat medium oil temperature measuring apparatus In the case where two threshold values, increase the flow velocity of the heat medium oil flowed in the entirety of the heat-carrying oil circulation path.
2. cogeneration systems according to claim 1, wherein
The bypass path is in the heat-carrying oil circulation path by the upstream side of the second heat exchanger and second heat The downstream side of exchanger connects in a manner of around the second heat exchanger,
The control device is adjusted the flow of the heat medium oil flowed in the bypass path.
3. cogeneration systems according to claim 1 or 2, wherein
The cogeneration systems have anti-white cigarette device, which utilizes and be discharged from the second heat exchanger and pass through institute The exhaust gas after stating dust collect plant heats outside air, and the exhaust gas and the outside air are supplied to chimney It gives.
CN201680046813.1A 2015-12-24 2016-12-21 Cogeneration systems Active CN107923608B (en)

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PCT/JP2016/088047 WO2017110848A1 (en) 2015-12-24 2016-12-21 Waste heat power generation system

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KR101861511B1 (en) 2018-05-28
SG11201801586TA (en) 2018-04-27

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