CN1290805A - Condensing system technology and equipment for heat power plant - Google Patents
Condensing system technology and equipment for heat power plant Download PDFInfo
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- CN1290805A CN1290805A CN 00109865 CN00109865A CN1290805A CN 1290805 A CN1290805 A CN 1290805A CN 00109865 CN00109865 CN 00109865 CN 00109865 A CN00109865 A CN 00109865A CN 1290805 A CN1290805 A CN 1290805A
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Abstract
The condensing system technology and equipment of the present invention is used to replace cooling twoer in heat power plant. It includes condensed water recoverer, heat exchanger, pipeline with pressure regulating valve and automatic frequency-verying speed regulating contrller. Without cooling tower loss, which accounts for 40 % of boiler output, the present invention has high heat efficiency.
Description
The present invention is used for complete set technology and the equipment that thermoelectricity plant and even thermal power plant's low temperature condensing make full use of for a kind of.
The steam turbine of power plant is to be the rotary-type thermal motility machinery of working medium with steam, is divided into condensed steam type, steam-extracting type, back pressure type, the back pressure type that draws gas, exhaust steam formula, multi-pressure turbine by thermodynamic property.Steam turbine both domestic and external must be formed complete sets of equipment, matching coordinative work with subsidiary engines such as boiler, generator, vapour condenser, cooling tower, heater, oxygen-eliminating device and pumps.Basic principle is that steam enters work done behind the steam turbine, its thermal power transfer is become the mechanical work of pushing turbine rotor rotation, steam behind the expansion working is partly discharged by turbine discharge, condensing steam turbine commonly used, its steam discharge is introduced into vapour condenser, condense by cooling tower heat radiation, water of condensation is delivered in the heater after the heating as the boiler feed water periodic duty through pump again.
The thermodynamic cycle in power station, at present the thermal efficiency of condensing steam turbine device is about 35%～45%, and the high thermal efficiency of the ideal heat engine of Carnot's cycle work is 55%～65%, promptly still has 20 percentage points the thermal efficiency to have much room for improvement in the reality.
For multiple electricity, normally adopt water-cooled or the air-cooled exhaust steam pressure that reduces.The back pressure of power station steam turbine group and the coolant water temperature of vapour condenser, the water yield, film-cooled heat, the type of cooling and power level have direct relation, do not having under the condition of cooling water resources to adopt air-cooled cooling tower, the cooling tower in summer and southern high-temperature area to build huger.
In order to utilize some heat energy, after some intergrade of steam turbine, extract the steam that part was made merit out, in order to heated feed water more.For feedwater backheat circulation, the heat of extracted steam from turbine is used to improve boiler feed temperature, making draws gas reduces the cooling liberated heat.Adopt the feedwater backheat, keeping to increase the power of steam turbine under the constant situation of steam turbine last stage flow and leaving area, adopt multistage backheat, and utilize lower pressure as far as possible draw gas heated feed water, can make the share of regenerative steam amount and the amount of work maximum of steam flow in steam turbine of drawing gas.
Adopt cogeneration, though back pressure turbine can be obtained higher system thermal efficiency, its thermoelectricity ratio immobilizes, and does not increase heat energy output, just can not increase electric energy output, hot user's heat instability, and the quality of cogeneration can't be determined.Though draw gas back pressure type, singly take out condensed steam type, black soy sauce condensed steam type applying flexible, still exhaust steam to be entered in the vapour condenser, to the cooling water heat release of cooling tower, a large amount of heat energy are still wasted, and cause thermo-pollution.
Purpose of the present invention is exactly that vapour condenser double-curve cooling column with cogeneration power plant and even large thermal power plant removes.The double-curve cooling column that the consumption huge fund is built in order to slattern the heat energy of low-temperature steam exhaust, guarantees generator efficiency exactly.Though the exhaust steam temperature is very low, even have only 30～40 ℃, enthalpy is very high, slatterns the fuel of power plant more than 40%, and what should affirm is that waste is irrational forever! The present invention realizes above-mentioned purpose with Complete Set of New Technology and equipment under a kind of new theoretical direction.
The heat and power system of thermal power plant exists several worlds problem, the one, the low grade heat energy that cooling tower is got rid of can't utilize, because the temperature difference is too little, being transported to hot user has been worth without any heating, so only slattern, want to reclaim that this part is low warm, except heat pump, other way of recycling is obstructed in theory; The 2nd, adopt the back pressure turbine generated energy little, adopt extraction turbine to have only waste condensing heat could guarantee higher generated energy; The 3rd, power plant is managed by power department, and heat supply is then managed by municipal engineering to the urban district, or other industry heat of factory, and inter-trade being difficult to allocated; The 4th, this system need solve high-temperature water pump cavitation is destroyed--" pump cancer " world-famous puzzle, solve a high low pressure pipeline common network and back pressure pipeline cavitation bump difficult problem, solve the perishable technical barrier of drain valve, it is up to standard or up to standard and waste initial steam amount is too big to solve boiler deoxidizing method, realizes that low level is furnished with the ideal effect of pressing deoxygenation.
Thermoelectricity of the present invention and even thermal power plant's condensing new technology and equipment, be with the vapour condenser among Fig. 18, condensate pump 9, low-pressure turbocharger 10, high-order oxygen-eliminating device 11, boiler feed pump 13, drive small turbine 14, small turbine vapour condenser 15, drainage pump 16, the cooling tower 17 of feed water pump in addition comprise cover heat radiation earlier such as high-pressure heater 12 again the structure of the waste heat energy of heating eliminate.The corollary equipment of the substitute is among Fig. 2 is: steam heater 23, Condensate recovery device (comprising High Temperature High Pressure) 18 and 19, heat exchanger 20, low level have the hot equipment 22 of various usefulness of pressing oxygen-eliminating device 21, hot user.Simultaneously in systems engineering, also must solve the supporting technology that multiphase flow is used each link problem, the clash technology of problem, pump cavitation problem, the perishable difficult problem of drain valve of supporting solution carbonated drink, the technology of the high-order oxygen-eliminating device civil engineering of supporting solution cost height, difficult problems such as lifting cost is big, the construction time is long, inconvenient maintenance just can be removed symbol--the double-curve cooling column of power station.
Typical process flow of the present invention is low temperature and low pressure steam or the medium pressure steam with Steam Turbine Through IP Admission 5 and low pressure (LP) cylinder 6 generations, utilize the technology transfer of high low pressure pipeline common network to steam heater 23, through special Condensate recovery device 18, after pumping into steam heater 23 by the high temperature pump in 18 steam water interface is delivered to heat exchanger 20, heat exchanger 20 is with height, in, low pressure steam is transported to the far and near different hot equipment 22 of various usefulness and heat supply, enter Condensate recovery device 19 behind the water for cooling of heat exchanger, pump in 19 is squeezed into low level with water to be had and presses oxygen-eliminating device 21, or 19 and 21 have pressure oxygen-eliminating device 21 for one or more low level.The water part that 18 and 19 pump is got is used for circulation.System of the present invention also comprises electrical automatic control equipment and the safety protection device with the supporting pipeline pressure regulating valve of hot equipment 22, band frequency control of motor speed (or differential pressure transmitter, modulating valve).Basic principle is the abnormal application of multiphase flow, realizes the random variation of heat in vapour-liquid-vapour-liquid, in order to satisfy the different demands under the various conditions.
The present invention has captured the ultralow temperature steam heat of generally acknowledging both at home and abroad and can't utilize, the technical barrier that only emits, remove the symbol of thermoelectricity and even thermal power plant--double-curve cooling column, the solution of this great international problem, bring a revolution must for the system of thermal power plant, make the manager of power plant obtain huge energy saving economy benefit,, directly reduced the CO that the burning back produces because boiler oil significantly reduces
2, SO
2, TSP isothermal chamber effect, acid rain noxious gas emission, help protecting our earth home.
Claims (2)
1, a kind of condensing Complete Set of New Technology and equipment that is used for thermoelectricity and even thermal power plant; it comprises steam heater (23); special Condensate recovery device (18); heat exchanger (20); low level has pressure oxygen-eliminating device (21); the hot equipment of various usefulness (22), the electric automatization control device and the safety protection device of supporting pipeline pressure regulating valve, corresponding frequency control of motor speed (or differential pressure transmitter, modulating valve).
2, by above-mentioned new technology and equipment replacement radiator, the double-curve cooling column of thermoelectricity and even thermal power plant, with physical method low temperature vapour under the negative pressure is become structure and the principle that the steam of direct draught higher temperature is used, realized in the world that first the enclosed of a large amount of heat energy of low temperature vapour is recycled under the vacuum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00109865 CN1290805A (en) | 2000-07-10 | 2000-07-10 | Condensing system technology and equipment for heat power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00109865 CN1290805A (en) | 2000-07-10 | 2000-07-10 | Condensing system technology and equipment for heat power plant |
Publications (1)
| Publication Number | Publication Date |
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| CN1290805A true CN1290805A (en) | 2001-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN 00109865 Pending CN1290805A (en) | 2000-07-10 | 2000-07-10 | Condensing system technology and equipment for heat power plant |
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| CN (1) | CN1290805A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100378297C (en) * | 2004-10-01 | 2008-04-02 | 李荣庆 | Refrigeration condensing and air cooling facilities and its heat energy reclaiming system of turbo generator |
| CN101899999A (en) * | 2009-05-31 | 2010-12-01 | 中国电力工程顾问集团华东电力设计院 | Small turbine system in power plant and thermal cycle system in power plant containing same |
-
2000
- 2000-07-10 CN CN 00109865 patent/CN1290805A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100378297C (en) * | 2004-10-01 | 2008-04-02 | 李荣庆 | Refrigeration condensing and air cooling facilities and its heat energy reclaiming system of turbo generator |
| CN101899999A (en) * | 2009-05-31 | 2010-12-01 | 中国电力工程顾问集团华东电力设计院 | Small turbine system in power plant and thermal cycle system in power plant containing same |
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