CN202902461U - Preposition condenser feeding and retracting system - Google Patents

Preposition condenser feeding and retracting system Download PDF

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Publication number
CN202902461U
CN202902461U CN201220481419XU CN201220481419U CN202902461U CN 202902461 U CN202902461 U CN 202902461U CN 201220481419X U CN201220481419X U CN 201220481419XU CN 201220481419 U CN201220481419 U CN 201220481419U CN 202902461 U CN202902461 U CN 202902461U
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China
Prior art keywords
condenser
preposition
exhaust steam
temperature sensor
supply network
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CN201220481419XU
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Chinese (zh)
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田家耕
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BEIJING CHUANGSHI ENERGY CO LTD
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BEIJING CHUANGSHI ENERGY CO LTD
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/14Combined heat and power generation [CHP]

Abstract

A preposition condenser feeding and retracting system comprises a turbine (101), a heater for heating network (104), a preposition moist cold condenser (107), an absorption type heat pump (108), a heat supply network return temperature sensor (203), a dead steam temperature sensor (204), a preposition condenser dead steam inlet isolating valve (205) and a picture input device (PID) controller (206), wherein the heat supply network return temperature sensor (203) is arranged on a heat supply network water inlet pipeline (110). The dead steam temperature sensor (204) is arranged on a condenser dead steam pipeline (201), the preposition condenser dead steam inlet isolating valve (205) is arranged on the condenser dead steam pipeline (201), the PID controller (206) is connected with the heat supply network return temperature sensor (203), the dead steam temperature sensor (204) and the preposition condenser dead steam inlet isolating valve (205) to be used for controlling aperture of the preposition condenser dead steam inlet isolating valve (205).

Description

A kind of preposition condenser is thrown the system of moving back
Technical field
The utility model is about steam power plant's UTILIZATION OF VESIDUAL HEAT IN technology, particularly throws the system of moving back about a kind of preposition condenser.
Background technology
Fig. 1 is the exhaust steam residual heat recovery system structural representation of prior art, as shown in Figure 1, exhaust steam residual heat recovery system structural representation comprises: steam turbine 101, Air-Cooling Island 102, condensate pump 103, heat exchangers for district heating 104, circulation pump of heat-supply network 105 and heat exchangers for district heating drainage pump 106, preposition condenser 107, absorption heat pump 108, turbine low pressure cylinder 115, turn-off butterfly valve 114(and be installed on the described bypass exhaust steam pipeline 109, be used for regulating the exhaust steam amount) and vacuum-pumping pipeline 119(connect the incondensable gas outlet of described preposition condenser 107 and absorption heat pump 108).
The heat supply network circulation is series system: heat supply network recirculated water backwater enters heat pump (the dotted line frame among Fig. 1), after heat supply network backwater in the hot net water pipeline 113 is introduced into preposition condenser 107 by hot net water inlet pipeline 110, enter again absorption heat pump 108, again get back to the hot net water pipeline 113 from hot net water outlet conduit 111 at last.The exhaust steam in steam turbine system is parallel way: exhaust steam in steam turbine enters heat pump by bypass exhaust steam pipeline 109, is connected to respectively preposition condenser 107 and absorption heat pump 108.
Preposition condenser 107 is the tube shell type structure heat exchanger, and the heat supply network backwater flows in the heat exchanger tube of preposition condenser, and exhaust steam in steam turbine is in the shell fluid flow of preposition condenser and the heat supply network backwater heat exchange in the heat exchanger tube.The end difference of preposition condenser 107 is set to 2.8 degree, and with the heat supply network return water temperature is poor when spending greater than 2.8, preposition condenser 107 puts into operation when the exhaust steam in steam turbine temperature, and the heat supply network backwater enters absorption heat pump 108 and continues the heat absorption intensification after preposition condenser 107 heat absorptions.When the exhaust steam in steam turbine temperature and the heat supply network return water temperature is poor when spending less than or equal to 2.8, preposition condenser 107 off-the-lines, exhaust steam in steam turbine no longer enters preposition condenser 107 and the heat exchange of heat supply network backwater, does not absorb heat when the heat supply network backwater is flowed through preposition condenser 107, enters absorption heat pump 108 rear heat absorptions and heats up.
For example the long-term actual heat supply extraction pressure of certain steam power plant's 300MW unit is 0.2MPa(g), 230 ℃, the heat supply amount of drawing gas 200t/h, turbine discharge amount 150t/h, exhaust pressure 15kPa(a), 53.9 ℃ of exhaust temperatures.When heat supply network recirculated water return water temperature 〉=51.1 ℃ (53.9 ℃ of exhaust steam temperature, 2.8 ℃ of condenser terminal differences), preposition clammy condenser off-the-line.
Way for the input off-the-line of preposition condenser 107 in the prior art is: the staff judges the exhaust steam air inlet isolating valve of whether closing preposition condenser with this, the preposition condenser 107 of off-the-line by the temperature of DCS system monitoring heat supply network backwater.There is retardance in this monitoring method of adjustment, timely the preposition condenser 107 of off-the-line.
The utility model content
The utility model provides a kind of preposition condenser to throw the system of moving back, and preposition condenser is thrown the automatic control of moving back to realize automatically control.
To achieve these goals, the utility model provides a kind of preposition condenser to throw the system of moving back, and this preposition condenser is thrown the system of moving back and comprised: steam turbine 101, heat exchangers for district heating 104, preposition clammy condenser and absorption heat pump 108; The exhaust steam of turbine low pressure cylinder (115) enters described preposition condenser 107 through condenser exhaust steam pipeline 201, enters described absorption heat pump 108 through heat pump exhaust steam pipeline 202; Heat supply network backwater in the hot net water pipeline 113 enters described preposition condenser 107 through hot net water inlet pipeline 110; Described preposition condenser is thrown the system of moving back and is also comprised: heat supply network return water temperature sensor 203, be located on the described hot net water inlet pipeline 110; Exhaust steam temperature sensor 204 is located on the described condenser exhaust steam pipeline 201; Preposition condenser exhaust steam import isolating valve 205 is located on the described condenser exhaust steam pipeline 201; PID controller 206 connects described heat supply network return water temperature sensor 203, exhaust steam temperature sensor 204 and preposition condenser exhaust steam import isolating valve 205 by signal cable, is used for controlling the aperture of described preposition condenser exhaust steam import isolating valve 205.
The beneficial effects of the utility model are: utilize the collection to exhaust steam temperature and heat supply network return water temperature, regulate by PID and realized the preposition condenser exhaust steam of automatic control inlet valve, automatic switching condenser.So both reduce staff's workload, and can in time control rapidly condenser again.Guaranteed the steady of unit operation operating mode.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.In the accompanying drawings:
Fig. 1 is the exhaust steam residual heat recovery system structural representation of prior art;
Fig. 2 is that the preposition condenser of the utility model is thrown the structural representation of the system of moving back.
The specific embodiment
For the purpose, technical scheme and the advantage that make the utility model embodiment is clearer, below in conjunction with accompanying drawing the utility model embodiment is described in further details.At this, the utility model be used for is explained in illustrative examples of the present utility model and explanation thereof, but not as to restriction of the present utility model.
As shown in Figure 2, present embodiment provides a kind of preposition condenser to throw the system of moving back, and this preposition condenser is thrown the system of moving back and comprised: steam turbine 101, heat exchangers for district heating 104, turbine low pressure cylinder 115, preposition clammy condenser 107, absorption heat pump 108, heat supply network return water temperature sensor 203, exhaust steam temperature sensor 204, preposition condenser exhaust steam import isolating valve 205 and PID controller 206.
The exhaust steam of turbine low pressure cylinder 115 enters preposition condenser 107 through condenser exhaust steam pipeline 201, and the exhaust steam of turbine low pressure cylinder 115 enters absorption heat pump 108 through heat pump exhaust steam pipeline 202; Heat supply network backwater in the hot net water pipeline 113 enters preposition condenser 107 through hot net water inlet pipeline 110.
In order to obtain to enter the heat supply network backwater and the temperature difference that enters the exhaust steam of preposition condenser 107 of preposition condenser 107, at hot net water inlet pipeline 110 heat supply network return water temperature sensor 203 has been installed, at condenser exhaust steam pipeline 201 exhaust steam temperature sensor 204 has been installed.Heat supply network return water temperature sensor 203 is used for measuring the water temperature of heat supply network backwater before entering preposition condenser 107, and exhaust steam temperature sensor 204 is used for measuring the temperature of exhaust steam in steam turbine before entering preposition condenser 107.In addition, preposition condenser exhaust steam import isolating valve 205 also has been installed on condenser exhaust steam pipeline 201.
PID controller 206 connects described heat supply network return water temperature sensor 203, exhaust steam temperature sensor 204 and preposition condenser exhaust steam import isolating valve 205 by signal cable.PID controller 206 can obtain the water temperature value of the heat supply network backwater of heat supply network return water temperature sensor 203 measurements, can also obtain the temperature value of the exhaust steam in steam turbine of exhaust steam temperature sensor 204 measurements.PID controller 206 obtains the temperature difference Δ of heat supply network backwater and exhaust steam in steam turbine according to the temperature value of the water temperature value of heat supply network backwater and exhaust steam in steam turbine, the poor Δ of C.T and default temperature approach compare, if the temperature difference Δ is lower than default temperature approach, PID controller 206 will send instruction and control preposition condenser exhaust steam import isolating valve 205 and cut out, and will can not be heated when the heat supply network backwater is flowed through preposition condenser 107.When PID controller 206 detects the temperature difference Δ and is higher than again default temperature approach, PID controller 206 will send instruction and control preposition condenser exhaust steam import isolating valve 205 unlatchings, will be heated by the exhaust steam in steam turbine in the preposition condenser 107 when the heat supply network backwater is flowed through preposition condenser 107.Default temperature approach can be made as 2.8 degree, is not for limiting the utility model.
The beneficial effects of the utility model are: utilize the collection to exhaust steam temperature and heat supply network return water temperature, regulate the aperture that has realized the preposition condenser exhaust steam of automatic control inlet valve, automatic switching condenser by PID.So both reduce staff's workload, and can in time control rapidly condenser again.Guaranteed the steady of unit operation operating mode.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiment of the utility model; and be not used in and limit protection domain of the present utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (1)

1. a preposition condenser is thrown and is moved back system, comprising: steam turbine (101), heat exchangers for district heating (104), preposition clammy condenser and absorption heat pump (108); The exhaust steam of turbine low pressure cylinder (115) enters described preposition condenser (107) through exhaust steam pipeline (201), enters described absorption heat pump (108) through heat pump exhaust steam pipeline (202); Heat supply network backwater in the hot net water pipeline (113) enters described preposition condenser (107) through hot net water inlet pipeline (110); It is characterized in that described preposition condenser is thrown the system of moving back and also comprised:
Heat supply network return water temperature sensor (203) is located on the described hot net water inlet pipeline (110);
Exhaust steam temperature sensor (204) is located on the described condenser exhaust steam pipeline (201);
Preposition condenser exhaust steam import isolating valve (205) is located on the described condenser exhaust steam pipeline (201);
PID controller (206), connect described heat supply network return water temperature sensor (203), exhaust steam temperature sensor (204) and preposition condenser exhaust steam import isolating valve (205) by signal cable, be used for controlling the aperture of described preposition condenser exhaust steam import isolating valve (205).
CN201220481419XU 2012-09-19 2012-09-19 Preposition condenser feeding and retracting system Active CN202902461U (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103953961A (en) * 2014-05-19 2014-07-30 山东泓奥电力科技有限公司 High back pressure and heat pump combined heat supply system for air cooling unit
CN105737131A (en) * 2016-03-03 2016-07-06 陈克秀 Multi-network linked waste heat energy centralized heating system
CN105737230A (en) * 2016-04-21 2016-07-06 陈熙荣 Dual-source complementary multi-net linkage large-temperature-difference residual heat and waste heat energy central heating system
CN111779551A (en) * 2020-05-18 2020-10-16 华电电力科学研究院有限公司 Anti-freezing system and method for cold end of steam turbine when low-pressure cylinder of air cooling unit is cut off
CN111779551B (en) * 2020-05-18 2022-06-07 华电电力科学研究院有限公司 Anti-freezing system and method for cold end of steam turbine when low-pressure cylinder of air cooling unit is cut off

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103953961A (en) * 2014-05-19 2014-07-30 山东泓奥电力科技有限公司 High back pressure and heat pump combined heat supply system for air cooling unit
CN105737131A (en) * 2016-03-03 2016-07-06 陈克秀 Multi-network linked waste heat energy centralized heating system
CN105737230A (en) * 2016-04-21 2016-07-06 陈熙荣 Dual-source complementary multi-net linkage large-temperature-difference residual heat and waste heat energy central heating system
CN105737230B (en) * 2016-04-21 2018-12-07 陈熙荣 Waste thermal energy central heating system more than a kind of big temperature difference of complementary more net linkages of double source
CN111779551A (en) * 2020-05-18 2020-10-16 华电电力科学研究院有限公司 Anti-freezing system and method for cold end of steam turbine when low-pressure cylinder of air cooling unit is cut off
CN111779551B (en) * 2020-05-18 2022-06-07 华电电力科学研究院有限公司 Anti-freezing system and method for cold end of steam turbine when low-pressure cylinder of air cooling unit is cut off

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