CN104405459A - Backpressure machine acting and heat supply device for steam exhaust heat supply network of intermediate pressure cylinder of steam turbine - Google Patents
Backpressure machine acting and heat supply device for steam exhaust heat supply network of intermediate pressure cylinder of steam turbine Download PDFInfo
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- CN104405459A CN104405459A CN201410671487.6A CN201410671487A CN104405459A CN 104405459 A CN104405459 A CN 104405459A CN 201410671487 A CN201410671487 A CN 201410671487A CN 104405459 A CN104405459 A CN 104405459A
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- Y—GENERAL 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
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Abstract
The invention discloses a backpressure machine acting and heat supply device for a steam exhaust heat supply network of an intermediate pressure cylinder of a steam turbine. The backpressure machine acting and heat supply device comprises a backpressure machine and control equipment thereof, wherein an electric generator is arranged at a power output end of the backpressure machine to output electric energy, or an electric motor is arranged at the power output end of the backpressure machine to drive power equipment. The backpressure machine is additionally arranged on a pipeline between exhausted and extracted steam of the intermediate pressure cylinder and a first heater of a heat supply network so that the exhausted and extracted steam of the intermediate pressure cylinder drags the electric generator to generate electricity after being expanded by the backpressure machine and acting, or the power equipment is coaxially dragged by an SSS (Synchro-Self-Shifting) clutch and the electric motor; the steam exhausted after the backpressure machine acts is supplied to the first heater of the heat supply network. Compared with the prior art, the backpressure machine acting and heat supply device has the beneficial effects that the throttling loss of the exhausted steam of the intermediate pressure cylinder is reduced to the minimal without influencing a heat supply requirement by additionally arranging the backpressure machine, and part energy of the extracted steam is converted into high-grape power output which is used for generating the electricity or coaxially dragging the power equipment with the electric motor, so that the remarkable technical effects of energy conservation, consumption reduction and low-carbon environment protection are achieved.
Description
Technical field
The present invention relates to Steam Turbine Through IP Admission steam discharge heating network system, particularly relate to the back pressure machine acting for Steam Turbine Through IP Admission steam discharge heating network and heating arrangement.
Background technique
At present, China 300MW grade thermal power generation unit in the winter time heat supply time generally adopt intermediate pressure cylinder steam discharge connecting tube punching draw gas be delivered to heating network initial station, described heating network initial station is mainly used in depositing heat exchangers for district heating, circulating water pump, the equipment such as drainage pump and centralized control system, because of the structural limitations of steam turbine itself, the intermediate pressure cylinder exhaust steam pressure of part of generating units is at 0.4MPa ~ 0.5MPa, and external heating supply water temperature is generally at 90 DEG C ~ 110 DEG C, heating network initial station pressure only need can meet usage requirement at 0.1MPa ~ 0.15MPa, therefore, need to carry out throttling to Gateway Station in Heating Network heater admission door, but this can cause larger restriction loss, in order to solve the problem of above-mentioned restriction loss, the measure usually taked now unit is changed into two back pressure double rotor to exchange thermal power plant unit, low pressure rotor is changed by this modification scheme in the winter time, low pressure (LP) cylinder steam discharge directly supplies circulating water heating, again low pressure rotor is gained after the heat supply phase terminates.Although this side's transformation case effectively can solve the restriction loss of steam and the problem of cold source energy, but the external area of heat-supply service of improved unit needs to increase considerably (after 300MW Transformation of Unit area of heat-supply service should at 1,200 ten thousand square metres), otherwise heat supply network return water temperature will be caused too high, cause back pressure of condenser too high, and then cause unit to run.Therefore, for the power plant that area of heat-supply service is little, this modification scheme cannot be implemented.The technical problem how reducing the restriction loss that heat supply is drawn gas about sucking condensing type thermal power plant unit there is no solution effectively up to now.
The patent No. is that the Chinese invention patent of ZL201110433533.5 discloses and a kind ofly takes out heating energy-saving device and the power-economizing method thereof that solidifying unit installs back pressure machine additional, in big thermoelecrtic unit, back pressure machine is installed additional between steamer pusher side extraction opening on mesolow cylinder connecting tube and heat exchangers for district heating steam inlet, extraction control valve import is connected with the steamer pusher side extraction opening of mesolow cylinder connecting tube, extraction control valve outlet is connected with back pressure machine admission control valve import and the import of back pressure machine by-pass valve, the outlet of back pressure machine admission control valve is connected with back pressure machine steam inlet, the outlet of back pressure machine by-pass valve is connected with heat exchangers for district heating steam inlet, back pressure machine steam-expelling port is connected with heater steam inlet.This invention is by installing back pressure machine additional, power recovery is carried out to having more high-grade hot-fluid steam that supplies, reasonably excavate the maximum acting ability for hot-fluid, solve with the not energy-conservation problem of the external heat supply of high-grade steam, be applicable to electric power enterprise extraction condensing type cogeneration 300MW or the transformation of 600MW capacitance grade unit Synergistic and energy-saving.But the back pressure machine installed additional in the technological scheme of this invention does not arrange power take-off, therefore cannot realize utilizing the back pressure machine installed additional externally to carry out the technique effect of Power output, such as cannot realize the expansion work installing back pressure machine additional being used for drawing generator generating, also cannot realize coaxially dragging power equipment with motor, the restriction loss of intermediate pressure cylinder steam discharge thus cannot be realized to drop to MIN technique effect.
Summary of the invention
In order to solve the technological deficiency that above-mentioned existing Steam Turbine Through IP Admission steam discharge heating network system exists, the technical solution used in the present invention is as follows:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, comprise Steam Turbine Through IP Admission and turbine low pressure cylinder, two branch lines are provided with at the steam-expelling port of described Steam Turbine Through IP Admission, wherein a branch line is connected with the steam inlet of turbine low pressure cylinder, this branch line is equipped with low pressure (LP) cylinder admission regulating butterfly valve, the clutch end of described turbine low pressure cylinder is connected with main engine factory using electricity systems, another branch line of described Steam Turbine Through IP Admission steam-expelling port is equipped with back pressure machine and control apparatus thereof, at the steam inlet end of described back pressure machine, back pressure machine main inlet throttle-stop valve and throttle are housed, the clutch end of described back pressure machine is connected with generator, described generator is connected with main engine factory using electricity systems.
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, comprise Steam Turbine Through IP Admission and turbine low pressure cylinder, two branch lines are provided with at the steam-expelling port of described Steam Turbine Through IP Admission, wherein a branch line is connected with the steam inlet of turbine low pressure cylinder, this branch line is equipped with low pressure (LP) cylinder admission regulating butterfly valve, another branch line of described Steam Turbine Through IP Admission steam-expelling port is equipped with back pressure machine and control apparatus thereof, at the steam inlet end of described back pressure machine, back pressure machine main inlet throttle-stop valve and throttle are housed, the clutch end of described back pressure machine is connected with motor by SSS clutch, described motor is connected with power equipment.
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, comprise Steam Turbine Through IP Admission and turbine low pressure cylinder, two branch lines are provided with at the steam-expelling port of described Steam Turbine Through IP Admission, wherein a branch line is connected with the steam inlet of turbine low pressure cylinder, this branch line is equipped with low pressure (LP) cylinder admission regulating butterfly valve, another branch line of described Steam Turbine Through IP Admission steam-expelling port is equipped with back pressure machine and control apparatus thereof, at the steam inlet end of described back pressure machine, back pressure machine main inlet throttle-stop valve and throttle are housed, the clutch end of described back pressure machine is connected with power equipment by SSS clutch, described power equipment is connected with motor by SSS clutch.
Preferably, the exhaust line of described back pressure machine is provided with heat exchangers for district heating, and described heat exchangers for district heating is connected with drainage pump.
In above-mentioned either a program preferably, between the exhaust line and described heat exchangers for district heating of described Steam Turbine Through IP Admission, heat supply network back-up heater is provided with.
In above-mentioned either a program preferably, described heat supply network back-up heater is provided with two input ends and two output terminals, described two input ends are connected with heat exchangers for district heating with the exhaust line of Steam Turbine Through IP Admission respectively and are respectively equipped with heat supply network back-up heater admission adjustment doors and heat supply network back-up heater and to intake power door operation, and described two output terminals are connected with drainage pump with heat supply network back-up heater water outlet power door operation respectively.
In above-mentioned either a program preferably, described heat supply network back-up heater is provided with heat supply network back-up heater bypass power door operation.
In above-mentioned either a program preferably, comprise No. five low-pressure heaters, described No. five low-pressure heaters are connected with drainage pump, and described No. five low-pressure heaters are into the afterbody heater before oxygen-eliminating device.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts electric butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts Pneumatic butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts hydraulic butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts Hand-operated butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts central seal butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts single eccentric sealed butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts two eccentric sealed butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts three eccentricity seal butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts soft sealing butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts metal hard-sealing butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts forced seal butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts filling pressure sealing butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts automatic-sealed butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve presses butterfly valve in adopting.
In above-mentioned either a program preferably, warm butterfly valve in described low pressure (LP) cylinder admission regulating butterfly valve employing.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts high temperature butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts wafer type butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts flange-type butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts lug type butterfly valve.
In above-mentioned either a program preferably, described low pressure (LP) cylinder admission regulating butterfly valve adopts welding type butterfly valve.
In above-mentioned either a program preferably, described heat exchangers for district heating adopts basic heat exchangers for district heating.
In above-mentioned either a program preferably, described heat exchangers for district heating adopts eddy current hotting mask heat exchanging tube heat exchangers for district heating.
In above-mentioned either a program preferably, described heat exchangers for district heating adopts stainless steel screwed tube heat exchangers for district heating.
In above-mentioned either a program preferably, described heat supply network back-up heater adopts peak heat exchangers for district heating.
In above-mentioned either a program preferably, described heat supply network back-up heater adopts eddy current hotting mask heat exchanging tube heat exchangers for district heating.
In above-mentioned either a program preferably, described heat supply network back-up heater adopts stainless steel screwed tube heat exchangers for district heating.
The present invention's beneficial effect is compared with prior art: the present invention takes out the deficiency of solidifying unit intermediate pressure cylinder steam discharge heat supply process in order to make up existing 300MW, provide a kind of safe and reliable, the back pressure machine acting of adaptable intermediate pressure cylinder steam discharge heating network and heating arrangement, by draw gas at intermediate pressure cylinder steam discharge to heating network initial station heater between pipeline on install a back pressure machine additional, make intermediate pressure cylinder steam discharge draw gas first after back pressure machine expansion work for drawing generator export electric energy or by SSS clutch and motor coaxially arranged for dragging power equipment outputting power, again back pressure machine steam discharge is delivered to heating network initial station heater afterwards.The present invention is under the prerequisite not affecting normal heating demand, pass through that pressure is 0.4MPa ~ 0.5MPa by installed additional back pressure machine, the intermediate pressure cylinder steam discharge of 100 ~ 500t/h is down to the 0.1 MPa ~ 0.15MPa that can meet heating demand, significantly reduce the restriction loss of steam, the restriction loss of drawing gas is reduced to bottom line, and the portion of energy in drawing gas is changed into high-grade Energy transmission, for generating electricity or coaxially dragging power equipment with motor, thus obtain energy-saving and cost-reducing technique effect.Obviously, the present invention is by installing back pressure machine additional and coaxially arranged generator or power equipment, on the basis constant at Coal-fired capacity, steam supplying amount is substantially constant, make this take out solidifying unit and achieve reduction main engine factory power consumption rate, improve delivery simultaneously, reduce coal-fired consumption, or achieve and steam is effectively converted into Power output, thus obtain the technique effect of low-carbon environment-friendly.
Accompanying drawing explanation
Fig. 1 is the structural representation arranged according to back pressure machine and the generator coaxle of the back pressure machine for Steam Turbine Through IP Admission steam discharge heating network of the present invention acting and heating arrangement one preferred embodiment;
Fig. 2 is back pressure machine according to the back pressure machine for Steam Turbine Through IP Admission steam discharge heating network of the present invention acting and heating arrangement one preferred embodiment and the structural representation of motor arrangement in power equipment side;
Fig. 3 is back pressure machine according to the back pressure machine for Steam Turbine Through IP Admission steam discharge heating network of the present invention acting and heating arrangement one preferred embodiment and the structural representation of motor arrangement in power equipment both sides.
Description of reference numerals:
1 Steam Turbine Through IP Admission; 2 low pressure (LP) cylinder admission regulating butterfly valves; 3 turbine low pressure cylinders; 4 back pressure machine main inlet throttle-stop valve and throttles; 5 back pressure machines; 6 generators; 7 main engine factory's using electricity systems; 8 heat supply network back-up heater admission adjustment doors; 9 heat exchangers for district heatings; 10 heat supply network back-up heater water inlet power door operation; 11 heat supply network back-up heater; 12 heat supply network back-up heater water outlet power door operation; 13 heat supply network back-up heater bypass power door operation; 14 drainage pumps; 15 No. five low-pressure heaters; 16SSS clutch; 17 motor; 18 power equipments.
Embodiment
In order to understand the present invention better, below in conjunction with specific embodiment, the present invention is explained in detail, but, obviously can carry out different modification and remodeling to the present invention and not exceed the wider spirit and scope of the present invention of appended claims.Therefore, following examples have exemplary and hard-core implication.
Embodiment 1:
As shown in Figure 1, for back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, comprise Steam Turbine Through IP Admission 1 and turbine low pressure cylinder 3, two branch lines are provided with at the steam-expelling port of described Steam Turbine Through IP Admission 1, wherein a branch line is connected with the steam inlet of turbine low pressure cylinder 3, this branch line is equipped with low pressure (LP) cylinder admission regulating butterfly valve 2, the clutch end of described turbine low pressure cylinder 3 is connected with main engine factory using electricity system 7, another branch line of described Steam Turbine Through IP Admission 1 steam-expelling port is equipped with back pressure machine 5 and control apparatus thereof, at the steam inlet end of described back pressure machine 5, back pressure machine main inlet throttle-stop valve and throttle 4 are housed, the clutch end of described back pressure machine 5 is connected with generator 6, described generator 6 is connected with main engine factory using electricity system 7, the exhaust line of back pressure machine 5 is provided with heat exchangers for district heating 9, heat exchangers for district heating 9 is connected with drainage pump 14, heat supply network back-up heater 11 is provided with between the exhaust line and heat exchangers for district heating 9 of Steam Turbine Through IP Admission 1, heat supply network back-up heater 11 is provided with two input ends and two output terminals, described two input ends are connected with heat exchangers for district heating 9 with the exhaust line of Steam Turbine Through IP Admission 1 respectively and are respectively equipped with heat supply network back-up heater admission adjustment doors 8 and heat supply network back-up heater and to intake power door operation 10, described two output terminals are connected with drainage pump 14 with heat supply network back-up heater water outlet power door operation 12 respectively, heat supply network back-up heater 11 is provided with heat supply network back-up heater bypass power door operation 13, comprise No. five low-pressure heaters 15, No. five low-pressure heaters 15 are connected with drainage pump 14, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts electric butterfly valve, heat exchangers for district heating 9 adopts basic heat exchangers for district heating, heat supply network back-up heater 11 adopts peak heat exchangers for district heating, heat exchangers for district heating 9 and heat supply network back-up heater 11 all adopt eddy current hotting mask heat exchanging tube heat exchangers for district heating.
The working principle of embodiment 1: the present invention installs a back pressure machine additional by the pipeline that draws gas between Gateway Station in Heating Network heater at intermediate pressure cylinder steam discharge, make it for driving back pressure machine to do work and Driven by Coaxial generator exports power delivery to main engine factory's using electricity system by extracting part intermediate pressure cylinder steam discharge, vapor pressure after back pressure machine acting reaches 0.1MPa ~ 0.15MPa and heating network initial station heater, what supply hot heater to produce is hydrophobic, is delivered to the water of condensation inlet pipe of steam turbine No. five low-pressure heaters by drainage pump, when cold snap supply water temperature is not enough in the winter time, heat supply network back-up heater admission adjustment doors can be opened, heat supply network back-up heater is put into operation, the other parts of Steam Turbine Through IP Admission steam discharge then enter low pressure (LP) cylinder acting by low pressure (LP) cylinder admission regulating butterfly valve.
The working procedure of embodiment 1: a part of steam of Steam Turbine Through IP Admission 1 steam discharge enters back pressure machine 5 through back pressure machine main inlet throttle-stop valve and throttle 4, after expansion work, drawing generator 6 generates electricity and sends into main engine factory's using electricity system 7, steam exhaust steam pressure after back pressure machine 5 does work reduces, enter heat exchangers for district heating 9 subsequently and heat heat supply network circulating water, by the external supplying hot water of heat supply network back-up heater bypass power door operation 13, when cold season, supply water temperature was not enough in the winter time, open heat supply network back-up heater water inlet power door operation 10 and heat supply network back-up heater water outlet power door operation 12, close heat supply network back-up heater bypass power door operation 13, by adjustment heat supply network back-up heater admission adjustment doors 8, control external supplying hot water temperature, the hydrophobic water of condensation inlet pipe being delivered to No. five low-pressure heaters 15 by drainage pump 14 that heat exchangers for district heating 9 and heat exchangers for district heating for subsequent use 11 produce, other parts of Steam Turbine Through IP Admission 1 steam discharge then enter in turbine low pressure cylinder 3 through low pressure (LP) cylinder admission regulating butterfly valve 2 does work.
Embodiment 2:
As shown in Figure 2, for back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, comprise Steam Turbine Through IP Admission 1 and turbine low pressure cylinder 3, two branch lines are provided with at the steam-expelling port of described Steam Turbine Through IP Admission 1, wherein a branch line is connected with the steam inlet of turbine low pressure cylinder 3, this branch line is equipped with low pressure (LP) cylinder admission regulating butterfly valve 2, another branch line of described Steam Turbine Through IP Admission 1 steam-expelling port is equipped with back pressure machine 5 and control apparatus thereof, at the steam inlet end of described back pressure machine 5, back pressure machine main inlet throttle-stop valve and throttle 4 are housed, the clutch end of described back pressure machine 5 is connected with motor 17 by SSS clutch 16, described motor 17 is connected with power equipment 18, the exhaust line of back pressure machine 5 is provided with heat exchangers for district heating 9, heat exchangers for district heating 9 is connected with drainage pump 14, heat supply network back-up heater 11 is provided with between the exhaust line and heat exchangers for district heating 9 of Steam Turbine Through IP Admission 1, heat supply network back-up heater 11 is provided with two input ends and two output terminals, described two input ends are connected with heat exchangers for district heating 9 with the exhaust line of Steam Turbine Through IP Admission 1 respectively and are respectively equipped with heat supply network back-up heater admission adjustment doors 8 and heat supply network back-up heater and to intake power door operation 10, described two output terminals are connected with drainage pump 14 with heat supply network back-up heater water outlet power door operation 12 respectively, heat supply network back-up heater 11 is provided with heat supply network back-up heater bypass power door operation 13, comprise No. five low-pressure heaters 15, No. five low-pressure heaters 15 are connected with drainage pump 14, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts electric butterfly valve, heat exchangers for district heating 9 adopts basic heat exchangers for district heating, heat supply network back-up heater 11 adopts peak heat exchangers for district heating, heat exchangers for district heating 9 and heat supply network back-up heater 11 all adopt eddy current hotting mask heat exchanging tube heat exchangers for district heating.
The working principle of embodiment 2: the present invention installs a back pressure machine additional by the pipeline that draws gas between Gateway Station in Heating Network heater at intermediate pressure cylinder steam discharge, make it for driving back pressure machine to do work and being positioned at the homonymy Driven by Coaxial power equipment of motor by extracting part intermediate pressure cylinder steam discharge, the technique effect partly or entirely replacing motor to do work can be realized, vapor pressure after back pressure machine acting reaches 0.1MPa ~ 0.15MPa and heating network initial station heater, what supply hot heater to produce is hydrophobic, is delivered to the water of condensation inlet pipe of steam turbine No. five low-pressure heaters by drainage pump, when cold snap supply water temperature is not enough in the winter time, heat supply network back-up heater admission adjustment doors can be opened, heat supply network back-up heater is put into operation, the other parts of Steam Turbine Through IP Admission steam discharge then enter low pressure (LP) cylinder acting by low pressure (LP) cylinder admission regulating butterfly valve.
The working procedure of embodiment 2: a part of steam of Steam Turbine Through IP Admission 1 steam discharge enters back pressure machine 5 through back pressure machine main inlet throttle-stop valve and throttle 4, power equipment 18 is dragged by SSS clutch 16 with motor 17 is coaxial after expansion work, steam exhaust steam pressure after back pressure machine 5 does work reduces, enter heat exchangers for district heating 9 subsequently and heat heat supply network circulating water, by the external supplying hot water of heat supply network back-up heater bypass power door operation 13, when cold season, supply water temperature was not enough in the winter time, open heat supply network back-up heater water inlet power door operation 10 and heat supply network back-up heater water outlet power door operation 12, close heat supply network back-up heater bypass power door operation 13, by adjustment heat supply network back-up heater admission adjustment doors 8, control external supplying hot water temperature, the hydrophobic water of condensation inlet pipe being delivered to No. five low-pressure heaters 15 by drainage pump 14 that heat exchangers for district heating 9 and heat exchangers for district heating for subsequent use 11 produce, other parts of Steam Turbine Through IP Admission 1 steam discharge then enter in turbine low pressure cylinder 3 through low pressure (LP) cylinder admission regulating butterfly valve 2 does work.
Figure 2 shows that back pressure machine 5 and motor 17 are arranged on the technological scheme of power equipment 18 the same side, the axle of back pressure machine 5 is connected by SSS clutch 16 with the axle of motor 17, when back pressure machine 5 exert oneself the nominal output of failing to reach motor 17 time, back pressure machine 5 and motor 17 work simultaneously; When back pressure machine 5 exert oneself the nominal output reaching motor 17 time, motor 17 is out of service by automatic control switch, drags power equipment 18 separately by back pressure machine 5; In running, when back pressure machine 5 trips, motor 17 is put into operation and on-load automatically by automatic control switch.
Embodiment 3:
As shown in Figure 3, for back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, comprise Steam Turbine Through IP Admission 1 and turbine low pressure cylinder 3, two branch lines are provided with at the steam-expelling port of described Steam Turbine Through IP Admission 1, wherein a branch line is connected with the steam inlet of turbine low pressure cylinder 3, this branch line is equipped with low pressure (LP) cylinder admission regulating butterfly valve 2, another branch line of described Steam Turbine Through IP Admission 1 steam-expelling port is equipped with back pressure machine 5 and control apparatus thereof, at the steam inlet end of described back pressure machine 5, back pressure machine main inlet throttle-stop valve and throttle 4 are housed, the clutch end of described back pressure machine 5 is connected with power equipment 18 by SSS clutch 16, described power equipment 18 is connected with motor 17 by SSS clutch 16, the exhaust line of back pressure machine 5 is provided with heat exchangers for district heating 9, heat exchangers for district heating 9 is connected with drainage pump 14, heat supply network back-up heater 11 is provided with between the exhaust line and heat exchangers for district heating 9 of Steam Turbine Through IP Admission 1, heat supply network back-up heater 11 is provided with two input ends and two output terminals, described two input ends are connected with heat exchangers for district heating 9 with the exhaust line of Steam Turbine Through IP Admission 1 respectively and are respectively equipped with heat supply network back-up heater admission adjustment doors 8 and heat supply network back-up heater and to intake power door operation 10, described two output terminals are connected with drainage pump 14 with heat supply network back-up heater water outlet power door operation 12 respectively, heat supply network back-up heater 11 is provided with heat supply network back-up heater bypass power door operation 13, comprise No. five low-pressure heaters 15, No. five low-pressure heaters 15 are connected with drainage pump 14, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts electric butterfly valve, heat exchangers for district heating 9 adopts basic heat exchangers for district heating, heat supply network back-up heater 11 adopts peak heat exchangers for district heating, heat exchangers for district heating 9 and heat supply network back-up heater 11 all adopt eddy current hotting mask heat exchanging tube heat exchangers for district heating.
The working principle of embodiment 3: the present invention installs a back pressure machine additional by the pipeline that draws gas between Gateway Station in Heating Network heater at intermediate pressure cylinder steam discharge, make it for driving back pressure machine to do work and being positioned at the heteropleural Driven by Coaxial power equipment of motor by extracting part intermediate pressure cylinder steam discharge, the technique effect partly or entirely replacing motor to do work can be realized, vapor pressure after back pressure machine acting reaches 0.1MPa ~ 0.15MPa and heating network initial station heater, what supply hot heater to produce is hydrophobic, is delivered to the water of condensation inlet pipe of steam turbine No. five low-pressure heaters by drainage pump, when cold snap supply water temperature is not enough in the winter time, heat supply network back-up heater admission adjustment doors can be opened, heat supply network back-up heater is put into operation, the other parts of Steam Turbine Through IP Admission steam discharge then enter low pressure (LP) cylinder acting by low pressure (LP) cylinder admission regulating butterfly valve.
The working procedure of embodiment 3: a part of steam of Steam Turbine Through IP Admission 1 steam discharge enters back pressure machine 5 through back pressure machine main inlet throttle-stop valve and throttle 4, power equipment 18 is dragged by SSS clutch 16 with motor 17 is coaxial after expansion work, in the present embodiment, back pressure machine 5 and motor 17 are arranged in the both sides of power equipment 18, all be connected with power equipment 18 by SSS clutch 16, steam exhaust steam pressure after back pressure machine 5 does work reduces, enter heat exchangers for district heating 9 subsequently and heat heat supply network circulating water, by the external supplying hot water of heat supply network back-up heater bypass power door operation 13, when cold season, supply water temperature was not enough in the winter time, open heat supply network back-up heater water inlet power door operation 10 and heat supply network back-up heater water outlet power door operation 12, close heat supply network back-up heater bypass power door operation 13, by adjustment heat supply network back-up heater admission adjustment doors 8, control external supplying hot water temperature, the hydrophobic water of condensation inlet pipe being delivered to No. five low-pressure heaters 15 by drainage pump 14 that heat exchangers for district heating 9 and heat exchangers for district heating for subsequent use 11 produce, other parts of Steam Turbine Through IP Admission 1 steam discharge then enter in turbine low pressure cylinder 3 through low pressure (LP) cylinder admission regulating butterfly valve 2 does work.
Figure 3 shows that back pressure machine 5 and motor 17 are separately positioned on the technological scheme of power equipment 18 both sides, back pressure machine 5 is connected with power equipment 18 respectively by SSS clutch 16 with motor 17, when back pressure machine 5 exert oneself the nominal output of failing to reach motor 17 time, back pressure machine 5 and motor 17 work simultaneously; When back pressure machine 5 exert oneself the nominal output reaching motor 17 time, the SSS clutch 16 that is connected between motor 17 with power equipment 18 can be thrown off automatically, by back pressure machine 5 independent dragging power equipment 18; When occurring that in running back pressure machine 5 trips, motor 17 is put into operation after being connected by SSS clutch 16 and on-load automatically.
Embodiment 4:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts Pneumatic butterfly valve.
Embodiment 5:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts hydraulic butterfly valve.
Embodiment 6:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts Hand-operated butterfly valve.
Embodiment 7:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts central seal butterfly valve.
Embodiment 8:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts single eccentric sealed butterfly valve.
Embodiment 9:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts two eccentric sealed butterfly valve.
Embodiment 10:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts three eccentricity seal butterfly valve.
Embodiment 11:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts soft sealing butterfly valve.
Embodiment 12:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts metal hard-sealing butterfly valve.
Embodiment 13:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts forced seal butterfly valve.
Embodiment 14:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts filling pressure sealing butterfly valve.
Embodiment 15:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts automatic-sealed butterfly valve.
Embodiment 16:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 presses butterfly valve in adopting.
Embodiment 17:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, warm butterfly valve during low pressure (LP) cylinder admission regulating butterfly valve 2 adopts.
Embodiment 18:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts high temperature butterfly valve.
Embodiment 19:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts wafer type butterfly valve.
Embodiment 20:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts flange-type butterfly valve.
Embodiment 21:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts lug type butterfly valve.
Embodiment 22:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, low pressure (LP) cylinder admission regulating butterfly valve 2 adopts welding type butterfly valve.
Embodiment 23:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, heat exchangers for district heating 9 and heat supply network back-up heater 11 all adopt stainless steel screwed tube heat exchangers for district heating.
Embodiment 24:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, heat exchangers for district heating 9 adopts eddy current hotting mask heat exchanging tube heat exchangers for district heating, and heat supply network back-up heater 11 adopts stainless steel screwed tube heat exchangers for district heating.
Embodiment 25:
For back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, similar to embodiment 1 or 2 or 3, difference is, heat exchangers for district heating 9 adopts stainless steel screwed tube heat exchangers for district heating, and heat supply network back-up heater 11 adopts eddy current hotting mask heat exchanging tube heat exchangers for district heating.
Claims (10)
1. for back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, comprise Steam Turbine Through IP Admission (1) and turbine low pressure cylinder (3), two branch lines are provided with at the steam-expelling port of described Steam Turbine Through IP Admission (1), wherein a branch line is connected with the steam inlet of turbine low pressure cylinder (3), this branch line is equipped with low pressure (LP) cylinder admission regulating butterfly valve (2), the clutch end of described turbine low pressure cylinder (3) is connected with main engine factory's using electricity system (7), it is characterized in that, another branch line of described Steam Turbine Through IP Admission (1) steam-expelling port is equipped with back pressure machine (5) and control apparatus thereof, at the steam inlet end of described back pressure machine (5), back pressure machine main inlet throttle-stop valve and throttle (4) are housed, the clutch end of described back pressure machine (5) is connected with generator (6), described generator (6) is connected with main engine factory's using electricity system (7).
2. for back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, comprise Steam Turbine Through IP Admission (1) and turbine low pressure cylinder (3), two branch lines are provided with at the steam-expelling port of described Steam Turbine Through IP Admission (1), wherein a branch line is connected with the steam inlet of turbine low pressure cylinder (3), this branch line is equipped with low pressure (LP) cylinder admission regulating butterfly valve (2), it is characterized in that, another branch line of described Steam Turbine Through IP Admission (1) steam-expelling port is equipped with back pressure machine (5) and control apparatus thereof, at the steam inlet end of described back pressure machine (5), back pressure machine main inlet throttle-stop valve and throttle (4) are housed, the clutch end of described back pressure machine (5) is connected with motor (17) by SSS clutch (16), described motor (17) is connected with power equipment (18).
3. for back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, comprise Steam Turbine Through IP Admission (1) and turbine low pressure cylinder (3), two branch lines are provided with at the steam-expelling port of described Steam Turbine Through IP Admission (1), wherein a branch line is connected with the steam inlet of turbine low pressure cylinder (3), this branch line is equipped with low pressure (LP) cylinder admission regulating butterfly valve (2), it is characterized in that, another branch line of described Steam Turbine Through IP Admission (1) steam-expelling port is equipped with back pressure machine (5) and control apparatus thereof, at the steam inlet end of described back pressure machine (5), back pressure machine main inlet throttle-stop valve and throttle (4) are housed, the clutch end of described back pressure machine (5) is connected with power equipment (18) by SSS clutch (16), described power equipment (18) is connected with motor (17) by SSS clutch (16).
4. the acting of the back pressure machine for Steam Turbine Through IP Admission steam discharge heating network as described in claim 1 or 2 or 3 and heating arrangement, it is characterized in that, the exhaust line of back pressure machine (5) is provided with heat exchangers for district heating (9), and heat exchangers for district heating (9) is connected with drainage pump (14).
5., as claimed in claim 4 for back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, it is characterized in that, between the exhaust line and heat exchangers for district heating (9) of Steam Turbine Through IP Admission (1), be provided with heat supply network back-up heater (11).
6. as claimed in claim 5 for back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, it is characterized in that, heat supply network back-up heater (11) is provided with two input ends and two output terminals, described two input ends are connected with heat exchangers for district heating (9) with the exhaust line of Steam Turbine Through IP Admission (1) respectively and are respectively equipped with heat supply network back-up heater admission adjustment doors (8) and heat supply network back-up heater and to intake power door operation (10), and described two output terminals are connected with drainage pump (14) with heat supply network back-up heater water outlet power door operation (12) respectively.
7., as claimed in claim 6 for back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, it is characterized in that, heat supply network back-up heater (11) is provided with heat supply network back-up heater bypass power door operation (13).
8., as claimed in claim 6 for back pressure machine acting and the heating arrangement of Steam Turbine Through IP Admission steam discharge heating network, it is characterized in that, comprise No. five low-pressure heaters (15), No. five low-pressure heaters (15) are connected with drainage pump (14).
9. the acting of the back pressure machine for Steam Turbine Through IP Admission steam discharge heating network as described in claim 1 or 2 or 3 and heating arrangement, it is characterized in that, low pressure (LP) cylinder admission regulating butterfly valve (2) adopts electric butterfly valve.
10. the acting of the back pressure machine for Steam Turbine Through IP Admission steam discharge heating network as described in claim 1 or 2 or 3 and heating arrangement, it is characterized in that, low pressure (LP) cylinder admission regulating butterfly valve (2) adopts Pneumatic butterfly valve.
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| CN201410671487.6A CN104405459B (en) | 2014-11-21 | 2014-11-21 | For back pressure machine acting and the heating plant of Steam Turbine Through IP Admission steam discharge heating network |
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| CN105888739A (en) * | 2016-05-27 | 2016-08-24 | 东莞市联洲知识产权运营管理有限公司 | Novel high-back pressure cogeneration system |
| CN105888740A (en) * | 2016-01-27 | 2016-08-24 | 华电漯河发电有限公司 | Backpressure turbine and motor single-shaft combined drive connection structure |
| CN105927298A (en) * | 2016-06-16 | 2016-09-07 | 北京龙威发电技术有限公司 | Heating steam-extraction and heating-supply system adopting high-back-pressure small steam turbine |
| CN107313814A (en) * | 2017-06-23 | 2017-11-03 | 济南市琦泉热电有限责任公司 | A kind of coal-fired mud power plant system that can be lightened the burden for condenser and method |
| CN107687352A (en) * | 2017-07-03 | 2018-02-13 | 中国能源建设集团广东省电力设计研究院有限公司 | Combined cycle gas-steam turbine heating system |
| CN108167032A (en) * | 2017-12-26 | 2018-06-15 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | A kind of NCB types heat supply steam turbine back pressure pattern activation system and method |
| CN109184814A (en) * | 2018-09-21 | 2019-01-11 | 东方电气集团东方汽轮机有限公司 | A kind of steam turbine of achievable pure condensate and back pressure heat supply switchover operation |
| CN109654580A (en) * | 2019-01-29 | 2019-04-19 | 北京国电蓝天节能科技开发有限公司 | Heating system based on low pressure (LP) cylinder optical axis |
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| CN107313814B (en) * | 2017-06-23 | 2019-08-20 | 济南市琦泉热电有限责任公司 | A kind of can be the coal-fired mud power plant system and method for condenser Reduction of Students' Study Load |
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| CN108167032A (en) * | 2017-12-26 | 2018-06-15 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | A kind of NCB types heat supply steam turbine back pressure pattern activation system and method |
| CN108167032B (en) * | 2017-12-26 | 2023-06-27 | 中国大唐集团科学技术研究院有限公司火力发电技术研究所 | NCB type heating turbine back pressure mode starting system and method |
| CN109184814A (en) * | 2018-09-21 | 2019-01-11 | 东方电气集团东方汽轮机有限公司 | A kind of steam turbine of achievable pure condensate and back pressure heat supply switchover operation |
| CN109654580A (en) * | 2019-01-29 | 2019-04-19 | 北京国电蓝天节能科技开发有限公司 | Heating system based on low pressure (LP) cylinder optical axis |
| CN111005776A (en) * | 2019-12-16 | 2020-04-14 | 北京国电蓝天节能科技开发有限公司 | Heat supply method and heat supply system based on low-pressure cylinder optical axis heat supply technology |
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