CN111521034A - System for improve condenser vacuum - Google Patents

System for improve condenser vacuum Download PDF

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Publication number
CN111521034A
CN111521034A CN202010419292.8A CN202010419292A CN111521034A CN 111521034 A CN111521034 A CN 111521034A CN 202010419292 A CN202010419292 A CN 202010419292A CN 111521034 A CN111521034 A CN 111521034A
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CN
China
Prior art keywords
condenser
water
pipe
vacuum degree
communicated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010419292.8A
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Chinese (zh)
Inventor
郅富标
李文君
张秀奎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Shanghe Zhongchuang Science And Technology Achievement Conversion Co ltd
Original Assignee
Shandong Shanghe Zhongchuang Science And Technology Achievement Conversion Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shandong Shanghe Zhongchuang Science And Technology Achievement Conversion Co ltd filed Critical Shandong Shanghe Zhongchuang Science And Technology Achievement Conversion Co ltd
Priority to CN202010419292.8A priority Critical patent/CN111521034A/en
Publication of CN111521034A publication Critical patent/CN111521034A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28BSTEAM OR VAPOUR CONDENSERS
    • F28B9/00Auxiliary systems, arrangements, or devices
    • F28B9/10Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28BSTEAM OR VAPOUR CONDENSERS
    • F28B11/00Controlling arrangements with features specially adapted for condensers

Abstract

The invention relates to a system for improving the vacuum degree of a condenser, which comprises a water supply device, a heat pump unit, the condenser and a boiler water replenishing device, wherein the heat pump unit comprises a refrigerating unit and a heating unit; the water supply device is communicated with an electric three-way valve, and the electric three-way valve is respectively communicated with inlets of the refrigerating unit and the heating unit through a first connecting pipe and a second connecting pipe; the water outlet of the refrigerating unit is communicated with the high-pressure water pump through a third connecting pipe, and a flow control valve is arranged on the third connecting pipe; the high-pressure water pump is communicated with the atomizing nozzle, and the atomizing nozzle is arranged at an exhaust steam inlet of the condenser; the condenser is connected with a vacuum degree measuring instrument, and the vacuum degree measuring instrument is connected with a control device; the control device is connected with the electric three-way valve and the flow control valve; and a water outlet of the heating unit is communicated with a boiler water replenishing device. This application is through spraying cold water at the exhaust steam entrance, to the forced cooling of exhaust steam, improves the vacuum of condenser.

Description

System for improve condenser vacuum
Technical Field
The invention relates to the technical field of condensers in power plants, in particular to a system for improving the vacuum degree of the condensers.
Background
The condenser is an important component of a steam turbine plant and serves to collect the exhaust gases of the steam turbine. In order to fully collect the exhaust gas of the steam turbine and ensure the working efficiency of the steam turbine, a certain negative pressure environment (relative to the standard atmospheric pressure), namely the vacuum degree, needs to be maintained inside the condenser. At present, steam turbine condensers in the existing power plant thermal power plants have the problem of insufficient vacuum degree in operation and cannot reach the design value. The condenser has the following defects of low vacuum degree: firstly, the operating efficiency of the steam turbine is reduced, the generated energy is reduced, and further, the coal consumption and the water consumption of a power generation unit are high, and the operating cost is high; secondly, the operation safety of the steam turbine is seriously influenced, the operation safety of the whole unit is influenced, and adverse consequences are caused to the safe operation of the whole power plant. Because the temperature of water entering the boiler is low, the water in the boiler needs to be fully heated in order to generate high-pressure steam, and a large amount of energy is wasted.
Disclosure of Invention
The invention provides a system for improving the vacuum degree of a condenser, aiming at the problems of insufficient vacuum degree and serious resource waste of the condenser in the prior art.
The technical scheme for solving the technical problems is as follows: a system for improving the vacuum degree of a condenser comprises a water supply device, a heat pump unit, the condenser and a boiler water replenishing device, wherein the heat pump unit comprises a refrigerating unit and a heating unit;
the water supply device is communicated with an electric three-way valve, and the electric three-way valve is respectively communicated with inlets of the refrigerating unit and the heating unit through a first connecting pipe and a second connecting pipe;
the water outlet of the refrigerating unit is communicated with the high-pressure water pump through a third connecting pipe, and a flow control valve is arranged on the third connecting pipe;
the high-pressure water pump is communicated with the atomizing nozzle, and the atomizing nozzle is arranged at an exhaust steam inlet of the condenser;
the condenser is connected with a vacuum degree measuring instrument, and the vacuum degree measuring instrument is connected with a control device;
the control device is connected with the electric three-way valve and the flow control valve;
and a water outlet of the heating unit is communicated with a boiler water replenishing device.
The invention has the beneficial effects that: the water flowing out of the water supply device is divided into two paths, wherein one path of water enters a refrigerating unit of the heat pump unit for refrigerating and cooling; the other path enters a heating unit of the heat pump unit, and the heat released by refrigerating and cooling water is heated by using a refrigerating unit. The refrigerated water is pressurized by a high-pressure water pump and then is sprayed out by an atomizing nozzle arranged at an exhaust steam inlet of the condenser to forcibly cool the exhaust steam, so that the volume of the exhaust steam is reduced by instant condensation, the vacuum degree of the condenser is improved, and the operating efficiency and the generating capacity of the steam turbine are improved; the heated water flowing out of the heat pump unit directly enters the boiler water replenishing device, the water inlet temperature of the boiler water replenishing device is improved, and energy is saved.
On the basis of the technical scheme, in order to achieve the convenience of use and the stability of equipment, the invention can also make the following improvements on the technical scheme:
further, a water outlet of the condenser is communicated with a condensate pump, and the condensate pump is communicated with a boiler water replenishing device.
The beneficial effect of adopting the further technical scheme is that: condensed water formed by the low-temperature water sprayed by the atomizing nozzle after absorbing heat and increasing temperature and the exhaust steam when encountering cold is mixed in the condenser and then pumped into a boiler water replenishing device by the condensed water pump, so that the water replenishing temperature of the boiler is increased.
Further, the diameter of the first connecting pipe is larger than that of the second connecting pipe.
The beneficial effect of adopting the further technical scheme is that: the diameter of the first connecting pipe communicated with the refrigerating unit is large, sufficient cooling water can be sprayed to an inlet of the condenser after atomization, and the vacuum degree of the condenser is improved.
Further, the diameter ratio of the first connecting pipe to the second connecting pipe is: 3:2.
The beneficial effect of adopting the further technical scheme is that: the diameter of the two connecting pipes is set to be 3:2, so that the requirement of forced cooling of the dead steam can be met, and the water of the heating unit can be heated to a set temperature.
Further, the water outlet temperature of the refrigerating unit is 0 ℃, and the water outlet temperature of the heating unit is 50 ℃.
The beneficial effect of adopting the further technical scheme is that: the waste steam can be quickly cooled by cooling water to the lowest temperature of 0 ℃ of liquid water, so that the vacuum degree of the condenser is improved; the water of the heating unit is heated by absorbing the heat released when the refrigerating unit refrigerates, so that the water supplementing temperature of the boiler is improved, and the energy is saved.
Furthermore, the water outlets of the refrigerating unit and the heating unit are respectively provided with a temperature sensor, and the temperature sensors are connected with the control device.
The beneficial effect of adopting the further technical scheme is that: the temperature sensors are arranged at the water outlets of the refrigerating unit and the heating unit, so that the temperature of water entering the high-pressure water pump and the boiler water replenishing device can be accurately controlled; through being connected temperature sensor and controlling means, realize according to the flow of delivery port temperature variation dynamic adjustment refrigerating unit and heating unit water inlet to better satisfy operation requirement.
Drawings
FIG. 1 is a schematic view of a system for increasing the vacuum degree of a condenser according to the present invention;
the reference numbers are recorded as follows: the system comprises a water supply device 1, an electric three-way valve 2, a heat pump unit 3, a refrigerating unit 3-1, a heating unit 3-2, an atomizing nozzle 4, a condenser 5, a boiler water replenishing device 6, a steam turbine 7, a high-pressure water pump 8, a condensate water pump 9, a generator 10, a control device 11, a first connecting pipe 12, a second connecting pipe 13, a vacuum degree measuring instrument 14, a temperature sensor 15, a third connecting pipe 16 and a flow control valve 17.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, a system for improving the vacuum degree of a condenser comprises a water supply device 1, a heat pump unit 3, a condenser 5 and a boiler water replenishing device 6, wherein the heat pump unit 3 comprises a refrigerating unit 3-1 and a heating unit 3-2; in order to fully dissipate heat generated by cooling the refrigerating unit 3-1, the refrigerating unit 3-1 adopts a capillary tube, and the heating unit 3-2 is arranged adjacent to the refrigerating unit 3-1.
The water supply device 1 is communicated with an electric three-way valve 2, and the electric three-way valve 2 is respectively communicated with inlets of the refrigerating unit 3-1 and the heating unit 3-2 through a first connecting pipe 12 and a second connecting pipe 13; the water supply device 1 converts raw water into softened water at 20 ℃. Through softening water, can avoid boiler or pipeline to tie up out the incrustation scale, solve because of the incrustation scale leads to the extravagant problem of energy.
The water outlet of the refrigerating unit 3-1 is communicated with a high-pressure water pump 8 through a third connecting pipe 16, and a flow control valve 17 is arranged on the third connecting pipe 16;
the high-pressure water pump 8 is communicated with the atomizing nozzle 4, and the atomizing nozzle 4 is arranged at an exhaust steam inlet of the condenser 5; cold water flowing out of the refrigerating unit 3-1 is sprayed out in a fog shape at a high speed through the atomizing nozzle 4, is rapidly dispersed at an inlet of the condenser 5, is fully mixed with exhaust steam generated by the steam turbine 7 by acting, is forcibly cooled, rapidly reduces the volume of the exhaust steam, and improves the vacuum degree of the condenser. The steam turbine 7 is connected to a generator 10.
The condenser 5 is connected with a vacuum degree measuring instrument 14, and the vacuum degree measuring instrument 14 is connected with the control device 11;
the control device 11 is connected with the electric three-way valve 2 and the flow control valve 17;
the control device 11 receives the vacuum degree value of the condenser 5 sent by the vacuum degree measuring instrument 14, and controls the opening degree of the flow control valve 17, so as to control the amount of cold water sprayed by the atomizing nozzle 4. When the vacuum degree measuring instrument 14 detects that the vacuum degree value of the condenser 5 is lower than a set value, the vacuum degree measuring instrument 4 feeds the vacuum degree value back to the control device 11, and the control device 11 controls the opening of the flow control valve 17 to increase so that more cold water is sprayed into an exhaust steam inlet of the condenser 5; if the opening degree of the flow control valve 17 is set to the maximum value and still cannot meet the requirement of the vacuum degree, the control device 11 controls the electric three-way valve 2 to increase the water quantity of the first connecting pipe 12, so that more water enters the refrigerating unit 3-1 for cooling; when the vacuum degree measuring instrument 14 detects that the vacuum degree value of the condenser 5 is higher than a set value, the vacuum degree measuring instrument 4 feeds the vacuum degree value back to the control device 11, and the control device 11 controls the opening degree of the flow control valve 17 to be reduced so as to reduce the flow rate of cold water entering the exhaust steam inlet of the condenser 5, so that the vacuum degree of the condenser 5 is stabilized within a set range.
And the water outlet of the heating unit 3-2 is communicated with a boiler water supplementing device 6. The water outlet of the heating unit 3-2 is communicated with the boiler water replenishing device 6, so that the water inlet temperature of the boiler water replenishing device 6 is increased, and the energy is saved. The boiler water replenishing device 6 is connected with a steam turbine 7.
And a water outlet of the condenser 5 is communicated with a condensate pump 9, and the condensate pump 9 is communicated with a boiler water supplementing device 6. The low-temperature softened water sprayed by the atomizing nozzle 4 absorbs heat and is heated, and then is mixed with the exhaust steam condensate water in the condenser 5, and then is conveyed to the boiler water replenishing device 6 by the condensate water pump 9.
The diameter of the first connection pipe 12 is larger than the diameter of the second connection pipe 13. The first and second connection pipes 12 and 13 may be stainless steel pipes.
The diameter ratio of the first connecting pipe 12 to the second connecting pipe 13 is: 3:2. The diameters of the first connecting pipe 12 and the second connecting pipe 13 can be set to different proportions according to the vacuum degree requirement of the condenser 5.
The water outlet temperature of the refrigerating unit 3-1 is 0 ℃, and the water outlet temperature of the heating unit 3-2 is 50 ℃. The temperature value of the water outlet of the heating unit 3-2 is changed by changing the diameter ratio of the first connecting pipe 12 and the second connecting pipe 13.
The water outlets of the refrigerating unit 3-1 and the heating unit 3-2 are respectively provided with a temperature sensor 15, and the temperature sensors 15 are connected with the control device 11.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (6)

1. A system for improving the vacuum degree of a condenser is characterized by comprising a water supply device, a heat pump unit, the condenser and a boiler water replenishing device, wherein the heat pump unit comprises a refrigerating unit and a heating unit;
the water supply device is communicated with an electric three-way valve, and the electric three-way valve is respectively communicated with inlets of the refrigerating unit and the heating unit through a first connecting pipe and a second connecting pipe;
the water outlet of the refrigerating unit is communicated with the high-pressure water pump through a third connecting pipe, and a flow control valve is arranged on the third connecting pipe;
the high-pressure water pump is communicated with the atomizing nozzle, and the atomizing nozzle is arranged at an exhaust steam inlet of the condenser;
the condenser is connected with a vacuum degree measuring instrument, and the vacuum degree measuring instrument is connected with a control device;
the control device is connected with the electric three-way valve and the flow control valve;
and a water outlet of the heating unit is communicated with a boiler water replenishing device.
2. The system for improving the vacuum degree of the condenser according to claim 1, wherein a water outlet of the condenser is communicated with a condensate pump, and the condensate pump is communicated with a boiler water replenishing device.
3. The system for increasing the vacuum degree of a condenser according to claim 1, wherein the diameter of the first connecting pipe is larger than that of the second connecting pipe.
4. The system for improving the vacuum degree of a condenser according to claim 3, wherein the diameter ratio of the first connecting pipe to the second connecting pipe is as follows: 3:2.
5. The system for improving the vacuum degree of a condenser according to claim 4, wherein the temperature of the water outlet of the refrigerating unit is 0 ℃ and the temperature of the water outlet of the heating unit is 50 ℃.
6. The system for improving the vacuum degree of the condenser according to claim 1 or 5, wherein temperature sensors are arranged at water outlets of the refrigerating unit and the heating unit, and the temperature sensors are connected with a control device.
CN202010419292.8A 2020-05-18 2020-05-18 System for improve condenser vacuum Pending CN111521034A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010419292.8A CN111521034A (en) 2020-05-18 2020-05-18 System for improve condenser vacuum

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010419292.8A CN111521034A (en) 2020-05-18 2020-05-18 System for improve condenser vacuum

Publications (1)

Publication Number Publication Date
CN111521034A true CN111521034A (en) 2020-08-11

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ID=71909085

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010419292.8A Pending CN111521034A (en) 2020-05-18 2020-05-18 System for improve condenser vacuum

Country Status (1)

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CN (1) CN111521034A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104515409A (en) * 2014-12-25 2015-04-15 梁双印 Device for improving vacuum of thermal power generating unit
CN205102628U (en) * 2015-10-23 2016-03-23 华电郑州机械设计研究院有限公司 Saving energy and increasing efficiency's condenser water charging system
CN206488653U (en) * 2017-02-23 2017-09-12 北京质为科技有限公司 A kind of condenser self-loopa sprays spike cooling system
CN110017698A (en) * 2019-03-27 2019-07-16 南宁学院 A kind of air-cooled unpowered condenser water replenishing system
CN111023617A (en) * 2019-12-28 2020-04-17 郑晓昱 Device and method for cooling dead steam cooling water based on refrigeration mode

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104515409A (en) * 2014-12-25 2015-04-15 梁双印 Device for improving vacuum of thermal power generating unit
CN205102628U (en) * 2015-10-23 2016-03-23 华电郑州机械设计研究院有限公司 Saving energy and increasing efficiency's condenser water charging system
CN206488653U (en) * 2017-02-23 2017-09-12 北京质为科技有限公司 A kind of condenser self-loopa sprays spike cooling system
CN110017698A (en) * 2019-03-27 2019-07-16 南宁学院 A kind of air-cooled unpowered condenser water replenishing system
CN111023617A (en) * 2019-12-28 2020-04-17 郑晓昱 Device and method for cooling dead steam cooling water based on refrigeration mode

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