CN105863759A - Dead steam cooling and recycling system for steam-driven water feed pump in high-back-pressure modification system of wet-cold thermal power unit - Google Patents
Dead steam cooling and recycling system for steam-driven water feed pump in high-back-pressure modification system of wet-cold thermal power unit Download PDFInfo
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- CN105863759A CN105863759A CN201610242529.3A CN201610242529A CN105863759A CN 105863759 A CN105863759 A CN 105863759A CN 201610242529 A CN201610242529 A CN 201610242529A CN 105863759 A CN105863759 A CN 105863759A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 33
- 238000001816 cooling Methods 0.000 title claims abstract description 16
- 238000004064 recycling Methods 0.000 title claims abstract description 13
- 230000004048 modification Effects 0.000 title abstract description 4
- 238000012986 modification Methods 0.000 title abstract description 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 230000009466 transformation Effects 0.000 claims description 50
- 206010009866 Cold sweat Diseases 0.000 claims description 26
- 230000008878 coupling Effects 0.000 claims description 18
- 238000010168 coupling process Methods 0.000 claims description 18
- 238000005859 coupling reaction Methods 0.000 claims description 18
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 12
- 230000001131 transforming effect Effects 0.000 claims description 10
- 230000002209 hydrophobic effect Effects 0.000 claims description 9
- 239000007921 spray Substances 0.000 claims description 8
- 238000011084 recovery Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 26
- 230000000694 effects Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 240000002853 Nelumbo nucifera Species 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 2
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009998 heat setting Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000005619 thermoelectricity Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a dead steam cooling and recycling system for a steam-driven water feed pump in a high-back-pressure modification system of a wet-cold thermal power unit. The system mainly comprises a water feed pump small steam turbine, a steam turbine low-pressure cylinder, a heater, a hot presser, valves and pipe parts, wherein the valves and the pipe parts are used for connecting related units. The hot presser can be used for matching the exhaust steam of a medium-pressure cylinder with the dead steam of a small steam turbine to obtain target steam of which the pressure is between the pressure of the exhaust steam and the pressure of the dead steam. According to the system disclosed by the invention, a small quantity of exhaust steam of the medium-pressure cylinder is matched with the dead steam, ejected and pumped by the hot presser, of the small steam turbine to obtain utilizable steam; according to the system, the matched steam is used for heating circulating water of a heat supply network to supply heat; by utilizing the system disclosed by the invention, the small steam turbine body of the water feed pump is not modified, and a special steam condenser for the small steam turbine is not additionally arranged as well during high-back-pressure modification of the wet-cold thermal power unit; moreover, all dead steam of the small steam turbine of the water feed pump can be utilized.
Description
Technical field
The present invention relates to a kind of steam feed pump exhaust steam cooling and recycling system, especially relate to a kind of clammy fired power generating unit high
Steam feed pump exhaust steam cooling and recycling system in back pressure modernization system.
Background technology
For the clammy fired power generating unit of high back pressure transformation, because the little steam turbine of feed pump and big machine share a condenser, when Heating Period machine
After group runs back pressure raising, the exhaust steam pressure of little machine also can raise accordingly, for ensureing the properly functioning of little steam turbine, also needs little vapour
Machine body and corresponding pipeline system are transformed, to adapt to main frame high back pressure in winter and the operation demand of low back pressure in summer, if the most right
Little machine body is transformed accordingly, then need to arrange special feed pump turbine condenser.Application number CN201520172044.2
China's utility model discloses steam supply and the cooling system of a kind of high back pressure thermal power plant unit, and this system supplies for wet type cooling unit high back pressure
The problem that in heat transformation, the rising of main steam turbine back pressure can cause feed pump turbine needs to be transformed accordingly proposes different
Steam supply and cooling system, i.e. need to arrange special feed pump turbine condenser, and corresponding condenser invested relatively greatly and to giving
The utilization rate of water pump exhaust steam in steam turbine is relatively low.Application number CN201320768009.8 China utility model discloses a kind of feed pump
Small turbine waste-heat recovery device, this utility model adds a vapor-water heat exchanger and substitutes on feed pump small turbine original solidifying
Vapour device, thus reach increase external heat capacity and reduce the purpose of coal consumption, but if little machine body is not transformed, little machine exhaust steam
Being directly entered soda pop, to change vapour device limited, owing to heat supply network recirculated water return water temperature is at about 50 DEG C, therefore this soda pop to water circulation temperature rise
Heat exchanger cannot heat heat supply network recirculated water.And vapor-water heat exchanger area is relatively large thus invests higher, if wanting with little machine exhaust steam
Directly heat heat supply network recirculated water also to need little machine body carries out relevant transformation.
For the clammy fired power generating unit of high back pressure transformation, there are two kinds of technology settling modes for ensureing that the little steam turbine of feed pump is properly functioning,
A kind of for transform little steam turbine body and corresponding pipeline system, Heating Season and non-heating season take birotor switching mode, separately
A kind of is to arrange special feed pump turbine condenser.Little machine body is transformed by first kind of way, need to lead to little machine
Stream transformation carries out Tong Liao area, and changes high-low pressure nozzle, rotor, dividing plate, and duration longer investment exchanging rotor of bigger later stage is tieed up
Protect more complicated.The second way arranges special feed pump turbine condenser, system complex, and investment is relatively big and cannot utilize
Little machine exhaust steam.
1, the transformation of clammy fired power generating unit high back pressure faces the problem that feed pump little machine exhaust steam pressure cannot mate, and needs to little machine originally
Body and corresponding pipeline are transformed, more exchanging rotor or increase single condenser.
2, transforming little machine body and corresponding pipeline, Heating Season and non-heating season need more exchanging rotor, and quantities is relatively big,
Investment is relatively big, and needs little machine vapour source is adjusted to high pressure cylinder steam discharge, reduces unit cycle efficieny.
3, arranging special feed pump turbine condenser, counter investment is relatively big, system complex, and little machine exhaust steam cannot profit
With.
Summary of the invention
System of the present invention utilizes a small amount of intermediate pressure cylinder steam discharge to draw gas by hot press as driving the little machine exhaust steam of vapour source spray extraction
Mating into utilizable target vapor, the steam after this coupling can heat heat supply network circulating water heating, it is possible to enters steam turbine and returns
Hot systems heat-setting water, utilizes system of the present invention i.e. to may be implemented in during the transformation of clammy fired power generating unit high back pressure little to feed pump
Steam turbine does not carry out body transformation, and can also utilize the feed pump all exhaust steam of little steam turbine.
1, this patent system may utilize a small amount of intermediate pressure cylinder steam discharge by the little machine exhaust steam of hot press spray extraction, solves clammy thermoelectricity
Need little machine body and corresponding pipeline are carried out high back pressure transformation or the problem increasing independent condenser after the transformation of unit high back pressure.
2, this system is transformed without machine body little to subsidiary engine, and economical effect of heat-supply is higher than the transformation of little machine high back pressure.
3, this system is without individually increasing little machine condenser available all exhaust steam of little machine.
In order to solve the problems referred to above, invented in a kind of clammy fired power generating unit high back pressure modernization system steam feed pump exhaust steam cooling and
Recycling system, this system comprises steam turbine high-pressure cylinder 1, intermediate pressure cylinder 2, low pressure (LP) cylinder 3, electromotor 4, and clammy high back pressure changes
Make unit steam feed pump small turbine 5, hot press 6, heater 7, low pressure (LP) cylinder exhaust steam heating heat supply network circulating water outlet pipe 8,
Heat supply network recirculated water water supply 9, middle row's extraction for heat supply pipeline 10, turbine discharge pipe 11, big machine condenser piping is removed in little machine exhaust steam
12, high row draw gas to little machine 13, four sections of valve of regulation draw gas to little machine regulation valve 14, middle row draw gas to hot press regulation valve 15,
Low-pressure continuous siphunculus butterfly valve 16, feed pump little machine exhaust steam to hot press regulation valve 17, feed pump little machine exhaust steam are adjusted to big machine condenser
Joint valve 18, and connect the valves and fittings etc. of relevant apparatus.
When systems are functioning properly, its concrete workflow of Heating Period is that Steam Turbine Through IP Admission 2 steam discharge draws gas and draws gas through middle row
Enter hot press 6 spray extraction feed pump small turbine 5 exhaust steam to hot press regulation valve 15, mate into target vapor, coupling
After steam enter heater 7 carry out heat recovery.This heater 7 is the heater heating low pressure (LP) cylinder exhaust steam of the heat supply network second level
The heat supply network recirculated water water outlet 8 of heating, confesses to heat supply network recirculated water water supply line 9 after heating.
This system recovery of non-heating period, to original system, is closed feed pump little machine exhaust steam and is regulated valve 17 to hot press, open feedwater
Pump little machine exhaust steam regulates valve 18 to big machine condenser, and feed pump small steam turbine exhaust steam is to big machine condenser.
Use native system the clammy high back pressure little machine of retrofitted unit steam feed pump 1 without little machine body is carried out any transformation or
Special condenser is set, so that it may reclaims whole little machine exhaust steam at Heating Period, thus realizes energy-saving and cost-reducing purpose.
Use this patent system and small turbine high back pressure transformation comparative benefits have following some:
(1), after the transformation of little machine high back pressure, corresponding back pressure heating heat supply network recirculated water water temperature, substantially at about 72 DEG C, is born in unit heat
In the case of lotus is constant can only Substitute For Partial exhaust steam heat supply, power savings advantages is inconspicuous.And steam heating heat after this patent system matches
Net recirculated water water temperature can heat temperature rise can promote 10 DEG C to about 82 DEG C, and after can heating exhaust steam, heat supply network recirculated water carries out second
Level heating, arranges the amount of drawing gas in minimizing.
(2) after the transformation of little machine high back pressure, work vapour source switch to cold again, and little engine efficiency has and declines by a relatively large margin.This is specially
Profit system is on little engine efficiency without affecting, and compared with machine little with high back pressure, performance driving economy is higher.
(3) transformation of little machine high back pressure needs to design high back pressure rotor, carry out a series of activities such as Tong Liao area, birotor switching,
Improvement cost and operating cost are higher, and this patent system is the most less relative to improvement cost, operating cost.
Contrast case:
Identical unit steam feed pump small turbine, carries out high back pressure transformation and carries out this patent system reform, and after transformation, exhaust steam is used
Carry out heat supply and hot net water is heated to about 80 DEG C confesses.
After this patent system reform:
In formula: WrxLittle acc power after transforming for hot press；GrxAfter transforming for hot press, little machine is by four amounts of drawing gas；hscFour take out enthalpy
Value；hrpLittle machine steam discharge enthalpy after hot press transformation；QrExhaust steam heating load after hot press coupling；1/u hot press suction ratio；hry
Exhaust steam enthalpy after hot press coupling；hrysThe hydrophobic enthalpy of exhaust steam after coupling.
The high back pressure little machine of transformation:
In formula: WgxLittle acc power after transforming for high back pressure；GgxAfter high back pressure transformation, little machine is by cold vapour amount again；hlzCold enthalpy again；
hbpLittle machine exhaust enthalpy after high back pressure transformation；QgHigh back pressure transformation post-heating hot net water is to 80 DEG C of needs heats；hbpHigh back pressure is little
Machine exhaust enthalpy；hbpsThe little hydrophobic enthalpy of machine steam discharge；GzpHot net water is heated in 80 DEG C of need arranging the amount of drawing gas；hzpMiddle row draws gas enthalpy；hzps
Middle row draws gas hydrophobic enthalpy.
Contrast benchmark:
Can draw by comparing above:
(Grx+uGrx) ＜ (Ggx+Gzp)
Above formula shows: comprehensively transform steam consumption with quantity of steam less than high back pressure after this patent system reform, and after high back pressure transformation
Little machine vapour source is cold steam again, bigger than this patent system on the impact of unit cycle efficieny.
In native system, the parameter such as hot press sum of series compression ratio can be steamed according to intermediate pressure cylinder steam discharge, subsidiary engine little machine exhaust steam and coupling target
Vapour parameter is chosen, and steam jet ejector used by hot press also can be selected for adjustable.
Relative to prior art, it is an advantage of the current invention that:
1, this system is transformed without machine body little to subsidiary engine after utilizing in clammy fired power generating unit high back pressure modernization system, nothing
Need to individually increase little machine condenser, and economical effect of heat-supply is better than the transformation of subsidiary engine little machine high back pressure.
2, this system can the little machine exhaust steam of fully utilized steam feed pump.
Accompanying drawing explanation
Next with reference to accompanying drawing, the present invention is further described, wherein:
Steam feed pump exhaust steam cooling and recycling system in the clammy fired power generating unit high back pressure modernization system of Fig. 1: the present invention
Schematic diagram.
Wherein:
Steam turbine high-pressure cylinder 1,
Intermediate pressure cylinder 2,
Low pressure (LP) cylinder 3,
Electromotor 4,
Clammy high back pressure retrofitted unit steam feed pump small turbine 5,
Hot press 6,
Heater 7,
Low pressure (LP) cylinder exhaust steam heating heat supply network circulating water outlet pipe 8,
Heat supply network recirculated water water supply 9,
Middle row's extraction for heat supply pipeline 10,
Turbine discharge pipe 11,
Big machine condenser piping 12 is removed in little machine exhaust steam,
High row draws gas to little machine regulation valve 13,
Four sections are drawn gas to little machine regulation valve 14,
Middle row draws gas to hot press regulation valve 15,
Low-pressure continuous siphunculus butterfly valve 16,
Feed pump little machine exhaust steam regulates valve 17 to hot press,
Feed pump little machine exhaust steam regulates valve 18 to big machine condenser.
(Grx+uGrx) ＜ (Ggx+Gzp) contrast of steam utilization amount.
Detailed description of the invention
The present invention provides steam feed pump exhaust steam cooling and recycling system in a kind of clammy fired power generating unit high back pressure modernization system,
This system mainly include the little steam turbine of feed pump, turbine low pressure cylinder, heater, hot press and connect relevant apparatus valve and
Pipe fitting.Intermediate pressure cylinder steam discharge can be mated for the target vapor between both pressure by described hot press with little machine exhaust steam.For
The clammy fired power generating unit of high back pressure transformation, because the little steam turbine of feed pump and big machine share a condenser, when Heating Period unit operation is carried on the back
After pressure improves, the exhaust steam pressure of little machine also can raise accordingly, for ensureing the properly functioning of little steam turbine, and need to be to little steam turbine body and phase
Tubing is answered to transform, by the little machine rotor of replacing to adapt to main frame high back pressure in winter and the operation demand of low back pressure in summer,
System of the present invention utilizes a small amount of intermediate pressure cylinder steam discharge to draw gas to mate into utilizable by the little machine exhaust steam of hot press spray extraction
Steam, native system utilizes the steam heating heat supply network recirculated water after coupling to be used for heat supply, utilizes system of the present invention may be implemented in wet
Or not feed pump little steam turbine body during the transformation of cold fired power generating unit high back pressure and the most do not increase the special condenser of little machine, but also can profit
With the feed pump all exhaust steam of little steam turbine.
System of the present invention utilizes a small amount of intermediate pressure cylinder steam discharge to draw gas by hot press as driving the little machine exhaust steam of vapour source spray extraction
Mating into utilizable target vapor, the steam after this coupling can heat heat supply network circulating water heating, it is possible to enters steam turbine and returns
Hot systems heat-setting water, utilizes system of the present invention i.e. to may be implemented in during the transformation of clammy fired power generating unit high back pressure little to feed pump
Steam turbine does not carry out body transformation, and can also utilize the feed pump all exhaust steam of little steam turbine.
1, this patent system may utilize a small amount of intermediate pressure cylinder steam discharge by the little machine exhaust steam of hot press spray extraction, solves clammy thermoelectricity
Need little machine body and corresponding pipeline are carried out high back pressure transformation or the problem increasing independent condenser after the transformation of unit high back pressure.
2, this system is transformed without machine body little to subsidiary engine, and economical effect of heat-supply is higher than the transformation of little machine high back pressure.
3, this system is without individually increasing little machine condenser available all exhaust steam of little machine.
Specifically, with reference to Fig. 1, in order to solve the problems referred to above, vapour in a kind of clammy fired power generating unit high back pressure modernization system has been invented
Dynamic feed pump exhaust steam cooling and recycling system, this system comprises steam turbine high-pressure cylinder 1, intermediate pressure cylinder 2, low pressure (LP) cylinder 3, sends out
Motor 4, clammy high back pressure retrofitted unit steam feed pump small turbine 5, hot press 6, heater 7, low pressure (LP) cylinder exhaust steam is heated
Heat supply network circulating water outlet pipe 8, heat supply network recirculated water water supply 9, middle row's extraction for heat supply pipeline 10, turbine discharge pipe 11, little machine is weary
Vapour removes big machine condenser piping 12, and high row draws gas to little machine 13, four sections of valve of regulation to draw gas to little machine regulation valve 14, middle row and draws gas
Valve 17, the little machine of feed pump is regulated to hot press regulation valve 15, low-pressure continuous siphunculus butterfly valve 16, feed pump little machine exhaust steam to hot press
Exhaust steam to big machine condenser regulates valve 18, and connects the valves and fittings etc. of relevant apparatus.
When systems are functioning properly, its concrete workflow of Heating Period is that Steam Turbine Through IP Admission 2 steam discharge draws gas and draws gas through middle row
Enter hot press 6 spray extraction feed pump small turbine 5 exhaust steam to hot press regulation valve 15, mate into target vapor, coupling
After steam enter heater 7 carry out heat recovery.This heater 7 is the heater heating low pressure (LP) cylinder exhaust steam of the heat supply network second level
The heat supply network recirculated water water outlet 8 of heating, confesses to heat supply network recirculated water water supply line 9 after heating.
This system recovery of non-heating period, to original system, is closed feed pump little machine exhaust steam and is regulated valve 17 to hot press, open feedwater
Pump little machine exhaust steam regulates valve 18 to big machine condenser, and feed pump small steam turbine exhaust steam is to big machine condenser.
Use native system the clammy high back pressure little machine of retrofitted unit steam feed pump 1 without little machine body is carried out any transformation or
Special condenser is set, so that it may reclaims whole little machine exhaust steam at Heating Period, thus realizes energy-saving and cost-reducing purpose.
Use this patent system and small turbine high back pressure transformation comparative benefits have following some:
(1), after the transformation of little machine high back pressure, corresponding back pressure heating heat supply network recirculated water water temperature, substantially at about 72 DEG C, is born in unit heat
In the case of lotus is constant can only Substitute For Partial exhaust steam heat supply, power savings advantages is inconspicuous.And steam heating heat after this patent system matches
Net recirculated water water temperature can heat temperature rise can promote 10 DEG C to about 82 DEG C, and after can heating exhaust steam, heat supply network recirculated water carries out second
Level heating, arranges the amount of drawing gas in minimizing.
(2) after the transformation of little machine high back pressure, work vapour source switch to cold again, and little engine efficiency has and declines by a relatively large margin.This is specially
Profit system is on little engine efficiency without affecting, and compared with machine little with high back pressure, performance driving economy is higher.
(3) transformation of little machine high back pressure needs to design high back pressure rotor, carry out a series of activities such as Tong Liao area, birotor switching,
Improvement cost and operating cost are higher, and this patent system is the most less relative to improvement cost, operating cost.
Contrast case:
Identical unit steam feed pump small turbine, carries out high back pressure transformation and carries out this patent system reform, and after transformation, exhaust steam is used
Carry out heat supply and hot net water is heated to about 80 DEG C confesses.
After this patent system reform:
In formula: WrxLittle acc power after transforming for hot press；GrxAfter transforming for hot press, little machine is by four amounts of drawing gas；hscFour take out enthalpy
Value；hrpLittle machine steam discharge enthalpy after hot press transformation；QrExhaust steam heating load after hot press coupling；1/u hot press suction ratio；hry
Exhaust steam enthalpy after hot press coupling；hrysThe hydrophobic enthalpy of exhaust steam after coupling.
The high back pressure little machine of transformation:
In formula: WgxLittle acc power after transforming for high back pressure；GgxAfter high back pressure transformation, little machine is by cold vapour amount again；hlzCold enthalpy again；
hbpLittle machine exhaust enthalpy after high back pressure transformation；QgHigh back pressure transformation post-heating hot net water is to 80 DEG C of needs heats；hbpHigh back pressure is little
Machine exhaust enthalpy；hbpsThe little hydrophobic enthalpy of machine steam discharge；GzpHot net water is heated in 80 DEG C of need arranging the amount of drawing gas；hzpMiddle row draws gas enthalpy；hzps
Middle row draws gas hydrophobic enthalpy.
Contrast benchmark:
Can draw by comparing above:
(Grx+uGrx) ＜ (Ggx+Gzp)
Above formula shows: comprehensively transform steam consumption with quantity of steam less than high back pressure after this patent system reform, and after high back pressure transformation
Little machine vapour source is cold steam again, bigger than this patent system on the impact of unit cycle efficieny.
In native system, the parameter such as hot press sum of series compression ratio can be steamed according to intermediate pressure cylinder steam discharge, subsidiary engine little machine exhaust steam and coupling target
Vapour parameter is chosen, and steam jet ejector used by hot press also can be selected for adjustable.
Relative to prior art, this system utilize in clammy fired power generating unit high back pressure modernization system after without machine body little to subsidiary engine
Transform, it is not necessary to individually increase little machine condenser, and economical effect of heat-supply is better than the transformation of subsidiary engine little machine high back pressure, and this is
System can the little machine exhaust steam of fully utilized steam feed pump.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " concrete example ",
Or specific features, structure, material or the feature bag that the description of " some examples " etc. means to combine this embodiment or example describes
It is contained at least one embodiment or the example of the present invention.In this manual, the schematic representation's necessarily pin to above-mentioned term
To be identical embodiment or example.And, the specific features of description, structure, material or feature can any one or
Multiple embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, those skilled in the art
The feature of the different embodiments described in this specification or example and different embodiment or example can be combined and combines.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, above-described embodiment can be entered by those of ordinary skill in the art within the scope of the invention
Row changes, revises, replaces and modification.Protection scope of the present invention is defined by the claims.
Claims (4)
1. steam feed pump exhaust steam cooling and recycling system in a clammy fired power generating unit high back pressure modernization system
System, this system comprises steam turbine high-pressure cylinder 1, intermediate pressure cylinder 2, low pressure (LP) cylinder 3, electromotor 4, and clammy high back pressure changes
Make unit steam feed pump small turbine 5, hot press 6, heater 7, low pressure (LP) cylinder exhaust steam heating heat supply network circulation
Water outlet pipe 8, heat supply network recirculated water water supply 9, middle row's extraction for heat supply pipeline 10, turbine discharge pipe 11, little machine
Big machine condenser piping 12 is removed in exhaust steam, and high row draws gas to little machine 13, four sections of valve of regulation to draw gas to little machine and regulates valve
14, middle row draws gas to hot press regulation valve 15, low-pressure continuous siphunculus butterfly valve 16, feed pump little machine exhaust steam to hot pressing
Machine regulation valve 17, feed pump little machine exhaust steam to big machine condenser regulate valve 18, and connect the valve of relevant apparatus
Door and pipe fitting, wherein:
When systems are functioning properly, its concrete workflow of Heating Period be Steam Turbine Through IP Admission 2 steam discharge draw gas through
In crossing row draw gas to hot press regulation valve 15 enter hot press 6 spray extraction feed pump small turbine 5 exhaust steam,
Mating into target vapor, the steam after coupling enters heater 7 and carries out heat recovery, this heater 7
The heat supply network recirculated water water outlet 8 heated for the heating low pressure (LP) cylinder exhaust steam of heat supply network second level heater, to heat after heating
Net recirculated water water supply line 9 is confessed.
When being in non-heating period, this system recovery to original system, close feed pump little machine exhaust steam to hot press
Regulation valve 17, opens feed pump little machine exhaust steam and regulates valve 18, feed pump small steam turbine exhaust steam to big machine condenser
To big machine condenser.
Steam feed pump exhaust steam in clammy fired power generating unit high back pressure modernization system the most according to claim 1
Cooling and recycling system, the most improved little machine meets following equalities:
In formula: WrxLittle acc power after transforming for hot press；GrxAfter transforming for hot press, little machine is by four amounts of drawing gas；
hscFour take out enthalpy；hrpLittle machine steam discharge enthalpy after hot press transformation；QrExhaust steam heating load after hot press coupling；1/u
Hot press suction ratio；hryExhaust steam enthalpy after hot press coupling；hrysThe hydrophobic enthalpy of exhaust steam after coupling.
Steam feed pump exhaust steam in clammy fired power generating unit high back pressure modernization system the most according to claim 2
Cooling and recycling system, wherein high back pressure is transformed little machine and is met following equalities:
In formula: WgxLittle acc power after transforming for high back pressure；GgxAfter high back pressure transformation, little machine is by cold vapour amount again；hlz
Cold enthalpy again；hbpLittle machine exhaust enthalpy after high back pressure transformation；QgHigh back pressure transformation post-heating hot net water is to 80 DEG C of need
Want heat；hbpHigh back pressure little machine exhaust enthalpy；hbpsThe little hydrophobic enthalpy of machine steam discharge；GzpHot net water is heated to 80 DEG C of need
Middle row's amount of drawing gas；hzpMiddle row draws gas enthalpy；hzpsMiddle row draws gas hydrophobic enthalpy.
4. according to steam-operating in the clammy fired power generating unit high back pressure modernization system according to any one of claim 1-3
Feed pump exhaust steam cooling and recycling system, wherein the parameter such as hot press sum of series compression ratio can be according to intermediate pressure cylinder
The little machine exhaust steam of steam discharge, subsidiary engine and coupling target vapor parameter are chosen, and used by hot press, steam jet ejector is the most optional
With adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610242529.3A CN105863759B (en) | 2016-04-19 | 2016-04-19 | Dead steam cooling and recycling system for steam-driven water feed pump in high-back-pressure modification system of wet-cold thermal power unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610242529.3A CN105863759B (en) | 2016-04-19 | 2016-04-19 | Dead steam cooling and recycling system for steam-driven water feed pump in high-back-pressure modification system of wet-cold thermal power unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105863759A true CN105863759A (en) | 2016-08-17 |
| CN105863759B CN105863759B (en) | 2017-05-24 |
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| CN201610242529.3A Active CN105863759B (en) | 2016-04-19 | 2016-04-19 | Dead steam cooling and recycling system for steam-driven water feed pump in high-back-pressure modification system of wet-cold thermal power unit |
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| CN106988804A (en) * | 2017-05-26 | 2017-07-28 | 西安热工研究院有限公司 | A kind of low pressure (LP) cylinder linear leaf cooling system and method based on feed pump turbine steam discharge |
| CN107503809A (en) * | 2017-05-10 | 2017-12-22 | 程琛 | Condensing turbine low pressure (LP) cylinder cools down and small turbine exhaust steam heat recovery system |
| CN108506057A (en) * | 2018-03-01 | 2018-09-07 | 华电电力科学研究院有限公司 | A kind of co-generation unit and adjusting method for cutting off low pressure (LP) cylinder into vapour |
| CN108518716A (en) * | 2018-04-19 | 2018-09-11 | 联合瑞升（北京）科技有限公司 | A kind of thermal power plant's air cooling unit close-coupled exhaust steam residual heat recycling heating system |
| CN108533341A (en) * | 2018-04-19 | 2018-09-14 | 联合瑞升（北京）科技有限公司 | A kind of feed pump turbine exhaust steam residual heat recycling system |
| CN109611165A (en) * | 2018-10-30 | 2019-04-12 | 程琛 | A kind of application method of the new vapour source of heat exchangers for district heating |
| CN111206970A (en) * | 2018-11-21 | 2020-05-29 | 赫普科技发展（北京）有限公司 | Peak regulation system and control method for steam-injection steam extractor of thermal power plant |
| CN111206969A (en) * | 2018-11-21 | 2020-05-29 | 赫普科技发展（北京）有限公司 | System combining thermal power plant hot press and air separation system and control method |
| CN112610294A (en) * | 2020-12-24 | 2021-04-06 | 华能国际电力股份有限公司营口电厂 | Heat supply control system capable of utilizing waste heat of small machine exhaust steam and control method thereof |
| CN113294217A (en) * | 2021-05-21 | 2021-08-24 | 东方电气集团东方汽轮机有限公司 | Back pressure type steam turbine heat regeneration system with small steam turbine and thermodynamic balance design method |
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| CN107503809A (en) * | 2017-05-10 | 2017-12-22 | 程琛 | Condensing turbine low pressure (LP) cylinder cools down and small turbine exhaust steam heat recovery system |
| CN106988804A (en) * | 2017-05-26 | 2017-07-28 | 西安热工研究院有限公司 | A kind of low pressure (LP) cylinder linear leaf cooling system and method based on feed pump turbine steam discharge |
| CN106988804B (en) * | 2017-05-26 | 2019-04-09 | 西安热工研究院有限公司 | A kind of low pressure (LP) cylinder linear leaf cooling system and method based on feed pump turbine steam discharge |
| CN108506057A (en) * | 2018-03-01 | 2018-09-07 | 华电电力科学研究院有限公司 | A kind of co-generation unit and adjusting method for cutting off low pressure (LP) cylinder into vapour |
| CN108518716A (en) * | 2018-04-19 | 2018-09-11 | 联合瑞升（北京）科技有限公司 | A kind of thermal power plant's air cooling unit close-coupled exhaust steam residual heat recycling heating system |
| CN108533341A (en) * | 2018-04-19 | 2018-09-14 | 联合瑞升（北京）科技有限公司 | A kind of feed pump turbine exhaust steam residual heat recycling system |
| CN109611165A (en) * | 2018-10-30 | 2019-04-12 | 程琛 | A kind of application method of the new vapour source of heat exchangers for district heating |
| CN111206970A (en) * | 2018-11-21 | 2020-05-29 | 赫普科技发展（北京）有限公司 | Peak regulation system and control method for steam-injection steam extractor of thermal power plant |
| CN111206969A (en) * | 2018-11-21 | 2020-05-29 | 赫普科技发展（北京）有限公司 | System combining thermal power plant hot press and air separation system and control method |
| CN111206970B (en) * | 2018-11-21 | 2024-03-01 | 赫普科技发展（北京）有限公司 | Peak regulating system utilizing steam jet and steam extractor in thermal power plant and control method |
| CN111206969B (en) * | 2018-11-21 | 2024-05-10 | 赫普科技发展（北京）有限公司 | System for combining thermal power plant hot press with air separation system and control method |
| CN112610294A (en) * | 2020-12-24 | 2021-04-06 | 华能国际电力股份有限公司营口电厂 | Heat supply control system capable of utilizing waste heat of small machine exhaust steam and control method thereof |
| CN113294217A (en) * | 2021-05-21 | 2021-08-24 | 东方电气集团东方汽轮机有限公司 | Back pressure type steam turbine heat regeneration system with small steam turbine and thermodynamic balance design method |
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