CN114856734A - Steam turbine exhaust steam condensing system based on plate heat exchanger - Google Patents
Steam turbine exhaust steam condensing system based on plate heat exchanger Download PDFInfo
- Publication number
- CN114856734A CN114856734A CN202210514221.5A CN202210514221A CN114856734A CN 114856734 A CN114856734 A CN 114856734A CN 202210514221 A CN202210514221 A CN 202210514221A CN 114856734 A CN114856734 A CN 114856734A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- plate heat
- exhaust steam
- condensate
- pipe
- 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.)
- Granted
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 90
- 239000000498 cooling water Substances 0.000 claims abstract description 28
- 238000005086 pumping Methods 0.000 claims abstract description 26
- 238000009833 condensation Methods 0.000 claims abstract description 11
- 230000005494 condensation Effects 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims description 43
- 230000001105 regulatory effect Effects 0.000 claims description 36
- 238000007599 discharging Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 12
- 238000011084 recovery Methods 0.000 description 4
- 238000000605 extraction Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 241000521257 Hydrops Species 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/32—Collecting of condensation water; Drainage ; Removing solid particles
-
- 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
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
- F01K9/02—Arrangements or modifications of condensate or air pumps
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention provides a steam turbine exhaust steam condensing system based on a plate type heat exchanger, which comprises an exhaust steam inlet pipe, a cooling water outlet pipe, a condensed water outlet pipe, the plate type heat exchanger, a condensed water tank, a condensed water pump and a vacuumizing device, wherein the exhaust steam inlet pipe is connected with the cooling water inlet pipe; the exhaust steam of the steam turbine enters the plate heat exchanger through an exhaust steam inlet pipe; cooling water enters and exits the plate heat exchanger through a cooling water inlet pipe and a cooling water outlet pipe; the steam condensate water flows out through a condensate water outlet pipe on the plate heat exchanger, enters the condensate water tank, and then flows out through a condensate water pump connected with the bottom of the condensate water tank; the highest point of the condensed water discharge pipe is connected with a vacuumizing device, the pressure in the plate heat exchanger is adjusted through the vacuumizing device, and non-condensable gas is pumped out of the vacuumizing device. The invention mainly solves the problems of exhaust steam condensation and non-condensable gas discharge through the plate heat exchanger and the vacuum pumping device, thereby improving the vacuum degree of the steam turbine and effectively utilizing the exhaust steam energy.
Description
Technical Field
The invention relates to the technical field of power plants and other industrial industries using steam turbines, in particular to a steam turbine exhaust steam condensing system based on a plate heat exchanger.
Background
At present, most of domestic thermal power plant units adopt a steam turbine to drive a generator to generate power. Meanwhile, the steam turbine is used as a power machine with a wide use function and is also used as equipment for driving pumps, fans, compressors and the like in the industries of petrochemical engineering and the like. Is a widely used mechanical device. Steam turbines are typically operated by steam or other working fluid streams (e.g., low boiling point working fluid streams of rankine cycles) to drive other equipment. After the steam releases the thermal potential energy, it is exhausted from the turbine, commonly referred to as steam exhaust. In this case, the exhaust steam is generally condensed and recovered by using a condenser or the like. The existing condenser usually adopts a tubular heat exchanger structure, and the working performance of the tubular condenser directly influences the exhaust steam vacuum degree of a steam turbine and the recovery of exhaust steam waste heat.
The existing tubular heat exchanger has large volume and can not realize complete countercurrent heat exchange, so the realization of small end difference is difficult. Because the tube cannot be disassembled, the tube is inconvenient to clean, and the heat exchange effect is poor after fouling. When the capacity of the tubular heat exchanger is increased, the capacity cannot be increased by adding the plate, the number of the plates can be remanufactured or increased, the space required for maintenance is large, and great inconvenience exists.
Therefore, there is a need in the art to further improve the recovery process of the dead steam.
Disclosure of Invention
The invention aims to provide a steam turbine exhaust steam condensing system based on a plate heat exchanger, which can solve the technical problems that the prior art is large in size, cannot realize complete countercurrent heat exchange and is difficult to realize small end difference based on a tubular heat exchanger.
The invention provides a steam turbine exhaust steam condensing system based on a plate type heat exchanger, which comprises an exhaust steam inlet pipe, a cooling water outlet pipe, a condensed water outlet pipe, the plate type heat exchanger, a condensed water tank, a condensed water pump and a vacuumizing device, wherein the exhaust steam inlet pipe is connected with the cooling water inlet pipe;
the exhaust steam of the steam turbine enters the plate heat exchanger through the exhaust steam inlet pipe;
cooling water enters and exits the plate heat exchanger through the cooling water inlet pipe and the cooling water outlet pipe;
the steam condensate water flows out through the condensate water outlet pipe on the plate heat exchanger, enters the condensate water tank, and then flows out through the condensate water pump connected with the bottom of the condensate water tank;
the highest point of the condensed water discharge pipe is connected with the vacuumizing device, the pressure in the plate heat exchanger is adjusted through the vacuumizing device, and non-condensable gas is pumped out of the vacuumizing device.
Further, a liquid level meter is arranged on the condensation water tank and used for monitoring a liquid level value; the condensed water pump is connected with a condensed water drainage switch;
when the liquid level meter monitors that the liquid level is lower than a low threshold value, the condensate pump and the condensate water discharge switch are all closed;
and when the liquid level meter monitors that the liquid level is higher than a high threshold value, the condensate pump and the condensate water discharge switch are all turned on.
Furthermore, a balance pipe is arranged between the dead steam inlet pipe and the condensation water tank and is used for adjusting the pressure in the condensation water tank.
Furthermore, the highest point of the condensed water drainage pipe is connected with the vacuumizing device through a vacuumizing pipe, and an air regulating valve is arranged on the vacuumizing pipe.
Furthermore, pressure sensors are arranged on the exhaust steam inlet pipe and the vacuum pumping pipe, and are used for measuring the pressure in the exhaust steam inlet pipe and the vacuum degree in the vacuum pumping pipe, and feeding back to the air regulating valve through a pressure ratio pair to regulate the air inlet amount and further regulate the vacuum degree in the vacuum pumping pipe.
Further, the vacuum pumping device is a vacuum pump, a steam jet air extractor or a centralized vacuum pumping pipeline.
And the control device is connected with the liquid level meter, judges whether the liquid level is lower than a low threshold value or higher than a high threshold value by receiving the liquid level value monitored by the liquid level meter, and further controls the condensate pump and the condensate water drainage switch to be simultaneously turned off or turned on.
Further, the condensate pump is set as a variable-frequency adjustable condensate pump.
Further, the condensed water drainage switch is set as a regulating valve; the balance pipe is provided with a regulating valve.
Furthermore, the top of the plate heat exchanger is connected with a vacuumizing pipeline branch and is provided with a regulating valve, one end of the vacuumizing pipeline branch is connected with the top of the plate heat exchanger, and the other end of the vacuumizing pipeline branch is connected with the vacuumizing pipe or the vacuumizing device.
Compared with the prior art, the steam turbine exhaust steam condensing system based on the plate heat exchanger has the following beneficial effects:
1. the invention provides a steam turbine exhaust steam condensing system based on a plate heat exchanger, which can be used for the steam turbine exhaust steam condensing system and also can be used for the steam turbine exhaust steam heat recovery, provides good vacuum degree for a steam turbine, and recovers the exhaust steam heat when needed, thereby improving the work doing efficiency of the steam turbine and effectively recovering the heat, and better meeting the national aims of energy conservation, consumption reduction and double-carbon environmental protection.
2. The exhaust steam condensing system of the steam turbine based on the plate heat exchanger can be used for condenser, condenser with a preposed heat supply network, raw water heater, hot water preparation and the like, and can also be used for capacity increase, supplement and reinforcement based on the existing tubular condenser system. The device can also be used as a plate heat exchanger to allow condensation and heat recovery of steam containing non-condensable gas in a temperature and pressure range.
3. The invention effectively ensures and improves the cooling of the exhaust steam and the vacuum degree of the steam turbine, and is convenient for recovering the heat in the exhaust steam to achieve the aim of saving energy.
4. The invention solves the problems of the condensation of the exhaust steam and the discharge of the non-condensable gas, thereby improving the vacuum degree of the steam turbine and effectively utilizing the energy of the exhaust steam.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only used for explaining the concept of the present invention.
Fig. 1 is a schematic structural diagram of a steam turbine exhaust steam condensing system based on a plate heat exchanger.
Summary of reference numerals:
1. a steam exhaust steam inlet pipe 2, a cooling water inlet pipe 3 and a cooling water outlet pipe
4. Condensed water outlet pipe 5, plate heat exchanger 6 and condensed water tank
7. Condensate pump 8, liquid level meter 9 and condensate water drainage switch
10. Balance tube 11, vacuum tube 12 and air regulating valve
13. Vacuumizing device 14 and adjusting valve of exhaust steam inlet pipeline
15. Branch adjusting valve of vacuumizing pipeline at highest point of exhaust side of plate heat exchanger
16. Vacuumizing pipeline general regulating valve 17 and balance pipeline section regulating valve
P11-P18, pressure sensor
Detailed Description
Hereinafter, embodiments of a dead steam condensing system of a steam turbine based on a plate heat exchanger according to the present invention will be described with reference to the accompanying drawings.
The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include any obvious replacement or modification of the embodiments described herein.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structure of portions of embodiments of the present invention. The same or similar reference numerals are used to denote the same or similar parts.
The invention provides a steam turbine exhaust steam condensing system based on a plate heat exchanger, wherein a steam turbine comprises heavy industries such as power stations, chemical industry, steel and the like. The power stations can comprise thermal power stations such as coal-fired power stations, gas power stations, waste incineration power stations, biomass power stations, nuclear power stations, photo-thermal power stations and the like, and steam turbines in other industries such as chemical industry, steel and the like are widely used.
The steam turbine exhaust steam condensing system based on the plate type heat exchanger is mainly used for condensing exhaust steam discharged by a steam turbine, and comprises an exhaust steam inlet pipe 1, a cooling water inlet pipe 2, a cooling water outlet pipe 3, a condensed water outlet pipe 4, a plate type heat exchanger 5, a condensed water tank 6, a condensed water pump 7 and a vacuumizing device 13 as shown in figure 1. The exhaust steam of the steam turbine enters the plate heat exchanger 5 through the exhaust steam inlet pipe 1; cooling water enters and exits the plate heat exchanger 5 through the cooling water inlet pipe 2 and the cooling water outlet pipe 3; the steam condensate water flows out through the condensate water outlet pipe 4 on the plate heat exchanger 5, enters the condensate water tank 6, then flows out through the condensate water pump 7 connected with the bottom of the condensate water tank 6, and is conveyed to enter a condenser or other systems. The top of the condensed water tank 6 is connected with the vacuumizing device 13, the pressure in the plate heat exchanger 5 is adjusted through the vacuumizing device 13, and non-condensable gas is pumped out of the vacuumizing device 13.
The dead steam inlet pipe 1 is provided with a dead steam inlet pipeline regulating valve 14.
The invention can almost recover 100% of the exhaust steam into condensed water to achieve the water-saving effect, and meanwhile, the cooling water on the other side of the plate heat exchanger 5 absorbs the heat of the exhaust steam. Compared with other types of condensers, the condenser can keep better cleanness and convenience, achieves better end difference, keeps better vacuum degree, uses less cooling water, and increases the temperature of the cooling water higher.
The invention can discharge the non-condensable gas in the exhaust steam through the vacuum pumping device 13, thereby maintaining good vacuum degree.
In a further embodiment of the invention, a liquid level meter 8 is arranged on the condensate tank 6, and the liquid level meter 8 is used for monitoring a liquid level value; the condensate pump 7 is connected to a condensate drain switch 9, and the condensate drain switch 9 is arranged behind the condensate pump 7. When the liquid level meter 8 monitors that the liquid level is lower than a low threshold value, the condensate pump 7 and the condensate discharge switch 9 are all closed; and when the liquid level meter 8 monitors that the liquid level is higher than the high threshold value, the condensate pump 7 and the condensate discharge switch 9 are all opened. And when the liquid level meter 8 monitors that the liquid level is higher than the low threshold and lower than the high threshold, controlling the condensate pump 7 to be in a non-maximum load operation state. The water discharge of the condensate pump 7 is controlled by the liquid level signal, so that the flow of the discharged condensate is controlled. When the liquid level meter 8 gives an alarm at a high position, the condensate pump 7 and the condensate drain switch 9 need to be opened fully, and the continuous alarm will cause the shutdown. The condensate discharge switch 9 may be provided as a regulating valve, and participates in the control of the amount of water to be discharged together with the condensate pump 7. Especially when the condensate pump 7 is not operated under the variable frequency quantitative drainage condition.
The outlet direction of the condensate pump 7 is provided with a condensate water discharge switch 9, and the condensate water discharge switch 9 can be switched or adjusted according to the liquid level signal. The start and stop of the condensate pump 7 and the condensate discharge switch 9 and the strength of the discharged condensate are controlled through the liquid level signal, so that the liquid level in the condensate tank 6 is kept at a set value.
Wherein the condensate pump 7 is a variable frequency adjustable condensate pump 7 or other similar adjustable forms. The condensate drain switch 9 is configured as a regulating valve to further regulate the liquid level. The condensate draining switch 9 has the function of independently receiving the command to close, and can prevent the reverse working medium from flowing to the direction of the condensate pump 7 when the switch is closed.
The steam turbine exhaust steam condensing system based on the plate heat exchanger 5 further comprises a control device, wherein the control device is connected with the liquid level meter 8, and is used for judging whether the liquid level is lower than a low threshold value or higher than a high threshold value by receiving a liquid level value monitored by the liquid level meter 8, so that the condensate pump 7 and a condensate water drainage switch 9 are controlled to be turned off or turned on simultaneously. Alternatively, the displacement of the condensate pump 7 is controlled when the level value is monitored by the level gauge 8.
In a further embodiment of the present invention, a balance pipe 10 is disposed between the steam exhaust steam inlet pipe 1 and the condensation water tank 6, and the balance pipe 10 is used for adjusting the pressure inside the condensation water tank 6. Further, a controllable balance pipeline section regulating valve 17 is arranged on the balance pipe 10.
In a further embodiment of the present invention, the highest point of the condensed water outlet pipe 4 is connected to the vacuum extractor 13 through a vacuum extractor 11, and the vacuum extractor 11 is provided with an air regulating valve 12 and a vacuum extractor pipeline total regulating valve 16. The air regulating valve 12 is used for regulating the air intake quantity at the side of the vacuum pipeline, the vacuum pipeline general regulating valve 16 is used for regulating the intensity of the vacuum degree in the vacuum pipeline, and the vacuum device 13 is isolated from other parts of the system when the system fails. Wherein, the condensed water pipe discharges pure liquid or a mixture of at least two of steam, condensed water and non-condensable gas.
In a further embodiment of the present invention, pressure sensors P11 and P12 are respectively disposed on the steam exhaust steam inlet pipe 1 and the vacuum extraction pipe 11 in the steam turbine steam exhaust condensing system based on the plate heat exchanger 5 of the present invention, and the pressure sensors P11 and P12 are respectively used for measuring the pressure in the steam exhaust steam inlet pipe 1 and the vacuum degree in the vacuum extraction pipe 11, and feeding back the pressure ratio pair to the air regulating valve 12 to regulate the air inlet amount, thereby regulating the vacuum degree in the vacuum extraction pipe 11.
Wherein the condensation water tank 6 is arranged at the lower part of the plate heat exchanger 5 and is provided with a certain height difference. One end of the condensed water outlet pipe 4 is connected with a condensed water outlet of the plate heat exchanger 5, the other end of the condensed water outlet pipe is connected with the top of the condensed water tank 6, and the highest point of the condensed water outlet pipe 4 is connected with a vacuumizing device 13. The top of the plate heat exchanger 5 is connected with a vacuumizing pipeline branch, one end of the vacuumizing pipeline branch is connected with the top of the plate heat exchanger 5, and the other end of the vacuumizing pipeline branch is connected with the vacuumizing pipe 11 or the vacuumizing device 13. As shown in fig. 1, a highest point vacuumizing pipeline branch adjusting valve 15 at the exhaust side of the plate heat exchanger is arranged on the vacuumizing pipeline branch, and when the system operates, the highest point vacuumizing pipeline branch adjusting valve 15 at the exhaust side of the plate heat exchanger can automatically adjust the opening degree until the system is turned off.
The device is characterized in that a pressure sensor P11 is arranged on a pipeline of the exhaust steam inlet pipe 1, a pressure sensor P12 is arranged on a vacuum pumping pipeline connected with the highest point of the condensed water outlet pipe 4, a pressure sensor P14 is arranged on a pipeline connected with the condensed water outlet pipe 4 and the condensed water tank 6, pressure sensors P17 and P18 are respectively arranged at the highest point and the lowest point of the condensed water tank, a pressure sensor P13 is arranged on a branch pipeline of the vacuum pumping pipeline, a vacuum pumping suction inlet of the vacuum pumping device 13 is provided with P15, and a pressure sensor P16 is arranged behind a condensed water drainage switch 9.
When the condensate pump 7 is turned on, the condensate drain switch 9 is also turned on. When the condensate pump 7 is turned off, the condensate drain switch 9 is also turned off. The open/close states of the condensate pump 7 and the condensate drain switch 9 can be determined by the pressure sensor P16. When the condensate pump 7 is a constant pump and the water discharge is not adjustable, the condensate discharge switch 9 can be adjusted by a control device according to an instruction sent by the liquid level meter LI 8, so that the proper water discharge is achieved. The pressure sensor P17 and the pressure sensor P18 can be used as a supplementary judgment for the liquid level meter 8.
Before the system is started, the vacuumizing device 13 starts to vacuumize the whole system. The condensed water draining switch 9 is closed, and the waste steam inlet pipe regulating valve 14 is closed. The highest point vacuumizing pipeline branch regulating valve 15 on the exhaust steam side of the plate heat exchanger is opened, the air regulating valve 12 is closed, the vacuumizing vacuum degree can be judged through the pressure sensors P11-P15 and is compared with the pressure sensor P16, and the opening degree of the exhaust steam inlet pipe regulating valve 14 can be regulated according to the working load, so that the steam inlet amount of the exhaust steam is regulated.
When the system needs to be vacuumized before starting to work normally, the branch adjusting valve 15 of the vacuumizing pipeline at the highest point of the exhaust steam side of the plate heat exchanger can be opened, so that normal and rapid vacuumizing is facilitated. The vacuum level can be read by pressure sensor P13 and compared to pressure sensors P12, P14 and P15. After the system works normally, the highest point vacuumizing pipeline branch adjusting valve 15 at the exhaust side of the plate heat exchanger can be closed or whether the opening is adjusted is judged according to the value of the pressure sensor P13.
When the vacuum pumping device starts to work, the vacuum pumping pipeline total regulating valve 16 is opened, and the opening and closing state and the regulating opening degree can be judged according to the comparison of the pressure sensor P15 with the pressure sensors P12 and P13. When the vacuumizing device stops working, the vacuumizing pipeline main adjusting valve 16 is closed, the exhaust steam inlet pipeline adjusting valve 14 is closed, and at the moment, the vacuumizing pipeline main adjusting valve 16, the condensed water discharging switch 9 and the exhaust steam inlet pipeline adjusting valve 14 isolate the system from an external system together as required by working conditions.
Pressure sensor P14 can judge the inside hydrops condition of the perpendicular pipeline section of condensate outlet pipe 4 through pressure feedback, and P17, P18 measure the pressure at 6 tops of condensate tank and bottom respectively to adjust the pressure in 6 of condensate tank, do benefit to the drainage.
The vacuum extractor 13 generates vacuum to suck out the non-condensable gas discharged from the condensed water outlet pipe 4 and keep the gas part at the required vacuum degree. The vacuum tube 11 is provided with an air regulating valve 12, and the vacuum degree and the pressure of the vacuum tube 11 are regulated by regulating the air suction amount, wherein the vacuum degree can be measured by a pressure sensor P12 on the vacuum tube 11 and can be compared with a pressure sensor P11 to perform corresponding actions on the air regulating valve 12.
Further, the vacuum-pumping device 13 is a vacuum pump, a steam-jet air extractor, a water-jet air extractor, a centralized vacuum-pumping pipeline of a larger system or other vacuum-pumping devices 13, so as to achieve the purposes of maintaining the vacuum degree and extracting the non-condensed gas for discharge.
The vacuumizing device 13 is arranged at the top of the condensed water outlet pipe 4, so that the upper end of a condensed water outlet pipeline can be kept at a certain vacuum degree, and meanwhile, the sucked non-condensable gas is pumped out to the vacuumizing device 13 and is discharged. The system solves the problems of the condensation of the exhaust steam and the discharge of non-condensable gas, thereby improving the vacuum degree of the steam turbine and effectively utilizing the energy of the exhaust steam.
The steam turbine exhaust steam condensing system based on the plate type heat exchanger 5 provided by the invention adopts at least one plate type heat exchanger 5, can be independently operated by one set of the system, and can be operated in parallel by a plurality of sets of systems at one station when the condensing exhaust steam amount can not be met even if a plurality of heat exchangers of one set of the system are adopted, so that the condensing of the exhaust steam of the steam turbine is realized, and the steam turbine exhaust steam condensing system can also be used as the power assisting and improving supplement of condensing equipment such as the existing steam turbine condenser and the like. Because the plate heat exchanger 5 carries out countercurrent heat exchange, the water quantity is relatively small, the end difference is smaller, and the disassembly, assembly, expansion and cleaning are convenient, so that the vacuum degree is improved to the maximum extent, and the work doing efficiency of the steam turbine is further improved. Meanwhile, the plate heat exchanger 5 has the characteristics of small end difference and small cooling water amount, so that the water temperature of the cooling water can be further improved, and the purposes of reducing the use amount of the cooling water and improving the temperature of the cooling water to recycle heat are achieved.
The embodiment of the steam turbine exhaust steam condensing system based on the plate heat exchanger of the invention is explained above. The specific features such as shape, size and location of a plate heat exchanger based steam turbine exhaust condensing system of the present invention can be specifically designed by the function of the above disclosed features, and such designs can be realized by those skilled in the art. Moreover, the technical features disclosed above are not limited to the combinations with other features disclosed, and other combinations between the technical features can be performed by those skilled in the art according to the purpose of the present invention, so as to achieve the purpose of the present invention.
Claims (10)
1. A steam turbine exhaust steam condensing system based on a plate type heat exchanger is characterized by comprising an exhaust steam inlet pipe, a cooling water outlet pipe, a condensed water outlet pipe, the plate type heat exchanger, a condensed water tank, a condensed water pump and a vacuumizing device;
the exhaust steam of the steam turbine enters the plate heat exchanger through the exhaust steam inlet pipe;
cooling water enters and exits the plate heat exchanger through the cooling water inlet pipe and the cooling water outlet pipe;
the steam condensate water flows out through the condensate water outlet pipe on the plate heat exchanger, enters the condensate water tank, and then flows out through the condensate water pump connected with the bottom of the condensate water tank;
the highest point of the condensed water discharge pipe is connected with the vacuumizing device, the pressure in the plate heat exchanger is adjusted through the vacuumizing device, and non-condensable gas is pumped out of the vacuumizing device.
2. The plate heat exchanger based steam turbine exhaust steam condensing system of claim 1, wherein a liquid level meter is arranged on the condensation water tank and used for monitoring a liquid level value; the condensed water pump is connected with a condensed water drainage switch;
when the liquid level meter monitors that the liquid level is lower than a low threshold value, the condensate pump and the condensate water discharge switch are all closed;
and when the liquid level is monitored by the liquid level meter to be higher than a high-level threshold value, the condensate pump and the condensate draining switch are all turned on.
3. The plate heat exchanger based steam turbine exhaust steam condensing system according to claim 1, wherein a balance pipe is arranged between the exhaust steam inlet pipe and the condensate tank, and the balance pipe is used for adjusting the pressure in the condensate tank.
4. The exhaust steam condensing system of a steam turbine based on a plate heat exchanger as claimed in claim 1, wherein the bottom of the condensed water discharging pipe is connected with the condensed water tank, the highest point of the condensed water discharging pipe is connected with the vacuum pumping device through a vacuum pumping pipe, and an air adjusting valve is arranged on the vacuum pumping pipe.
5. The plate heat exchanger based steam turbine exhaust steam condensing system according to claim 4, wherein pressure sensors are disposed on the exhaust steam inlet pipe and the vacuum pipe, the pressure sensors are used for measuring the pressure in the exhaust steam inlet pipe and the vacuum degree in the vacuum pipe, and the pressure ratio pair is fed back to the air regulating valve to regulate the air inlet amount, so as to regulate the vacuum degree in the vacuum pipe.
6. The plate heat exchanger based steam turbine exhaust steam condensing system of claim 1, wherein the vacuum pumping device is a vacuum pump, a steam ejector or a centralized vacuum pumping pipeline.
7. The plate heat exchanger-based steam turbine exhaust steam condensing system according to claim 2, further comprising a control device, wherein the control device is connected to the liquid level meter, and receives the liquid level value monitored by the liquid level meter to determine whether the liquid level is lower than a low threshold value or higher than a high threshold value, so as to control the condensate pump and the condensate drain switch to be turned off or on simultaneously.
8. The plate heat exchanger based steam turbine exhaust steam condensing system of claim 1, wherein the condensate pump is configured as a variable frequency regulated condensate pump.
9. The plate heat exchanger based steam turbine exhaust steam condensing system of claim 2, wherein the condensed water draining switch is provided as a regulating valve, and the balance pipe is provided with a regulating valve.
10. The exhaust steam condensing system of a steam turbine based on a plate heat exchanger as claimed in claim 4, wherein a branch of a vacuum pumping pipeline is connected to the top of the plate heat exchanger, one end of the branch of the vacuum pumping pipeline is connected to the top of the plate heat exchanger, and the other end of the branch of the vacuum pumping pipeline is connected to the vacuum pumping pipe or the vacuum pumping device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210514221.5A CN114856734B (en) | 2022-05-11 | 2022-05-11 | Steam turbine exhaust steam condensing system based on plate heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210514221.5A CN114856734B (en) | 2022-05-11 | 2022-05-11 | Steam turbine exhaust steam condensing system based on plate heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114856734A true CN114856734A (en) | 2022-08-05 |
| CN114856734B CN114856734B (en) | 2024-05-03 |
Family
ID=82636795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210514221.5A Active CN114856734B (en) | 2022-05-11 | 2022-05-11 | Steam turbine exhaust steam condensing system based on plate heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114856734B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201772765U (en) * | 2010-09-02 | 2011-03-23 | 洛阳隆华传热科技股份有限公司 | Efficient evaporation type mixed flow condenser |
| CN102393153A (en) * | 2011-07-11 | 2012-03-28 | 华东理工大学 | Condensation mode and condensing unit of steam turbine set used in summer peak |
| CN103527267A (en) * | 2013-10-14 | 2014-01-22 | 西安热工研究院有限公司 | Direct air-cooling unit system with plate-type evaporative condenser unit adopted |
| CN104864732A (en) * | 2015-05-15 | 2015-08-26 | 西安热工研究院有限公司 | Evaporation type condenser system used for thermal power plant small steam turbine steam exhaust condensing |
| CN205445693U (en) * | 2015-12-31 | 2016-08-10 | 神华集团有限责任公司 | Steam turbine cooling device and turbo generator unit |
| CN109708486A (en) * | 2018-12-25 | 2019-05-03 | 陕西渭河发电有限公司 | A kind of steam turbine condenser pumped vacuum systems and control method with cooling device |
| CN209026801U (en) * | 2018-09-12 | 2019-06-25 | 深圳市博众节能工程技术有限公司 | A kind of novel firepower condenser of power plant and its circulating cooling system |
| CN212867652U (en) * | 2020-07-30 | 2021-04-02 | 四川广安发电有限责任公司 | Steam turbine condensation processing system |
| US20210300788A1 (en) * | 2020-03-29 | 2021-09-30 | Chaac Holdings, Inc. | Atmospheric water and power generation compression apparatus, system and method |
| CN217354498U (en) * | 2022-05-11 | 2022-09-02 | 郭兴军 | Steam turbine exhaust steam condensing system based on plate heat exchanger |
-
2022
- 2022-05-11 CN CN202210514221.5A patent/CN114856734B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201772765U (en) * | 2010-09-02 | 2011-03-23 | 洛阳隆华传热科技股份有限公司 | Efficient evaporation type mixed flow condenser |
| CN102393153A (en) * | 2011-07-11 | 2012-03-28 | 华东理工大学 | Condensation mode and condensing unit of steam turbine set used in summer peak |
| CN103527267A (en) * | 2013-10-14 | 2014-01-22 | 西安热工研究院有限公司 | Direct air-cooling unit system with plate-type evaporative condenser unit adopted |
| CN104864732A (en) * | 2015-05-15 | 2015-08-26 | 西安热工研究院有限公司 | Evaporation type condenser system used for thermal power plant small steam turbine steam exhaust condensing |
| CN205445693U (en) * | 2015-12-31 | 2016-08-10 | 神华集团有限责任公司 | Steam turbine cooling device and turbo generator unit |
| CN209026801U (en) * | 2018-09-12 | 2019-06-25 | 深圳市博众节能工程技术有限公司 | A kind of novel firepower condenser of power plant and its circulating cooling system |
| CN109708486A (en) * | 2018-12-25 | 2019-05-03 | 陕西渭河发电有限公司 | A kind of steam turbine condenser pumped vacuum systems and control method with cooling device |
| US20210300788A1 (en) * | 2020-03-29 | 2021-09-30 | Chaac Holdings, Inc. | Atmospheric water and power generation compression apparatus, system and method |
| CN212867652U (en) * | 2020-07-30 | 2021-04-02 | 四川广安发电有限责任公司 | Steam turbine condensation processing system |
| CN217354498U (en) * | 2022-05-11 | 2022-09-02 | 郭兴军 | Steam turbine exhaust steam condensing system based on plate heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114856734B (en) | 2024-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107246807B (en) | Efficient adjustable vacuum control method and system for power plant | |
| CN217354498U (en) | Steam turbine exhaust steam condensing system based on plate heat exchanger | |
| CN201852520U (en) | Thermal state flushing device of direct air cooling system in thermal power plant | |
| CN111503949A (en) | Secondary refrigerant concentration control and energy efficiency maintaining system for heat pump secondary refrigerant circulating system | |
| CN106949753A (en) | A kind of control method of the changeable vacuum system of Air-cooled Unit full working scope | |
| CN114856734B (en) | Steam turbine exhaust steam condensing system based on plate heat exchanger | |
| CN1029529C (en) | Steam heat supply closed circulation equipment | |
| CN216986314U (en) | Evaporation concentration system | |
| CN215939038U (en) | Wheat starch water MVR evaporation concentration device | |
| CN210384862U (en) | Urea evaporative condenser evacuating device | |
| CN212671884U (en) | Waste heat power generation circulating water control system | |
| CN210069823U (en) | Steam condensate water closed recovery system | |
| CN213335625U (en) | Leading evacuation system that congeals of gravity flow | |
| CN209801595U (en) | Heat pipe mode phase change heat supply system | |
| CN210741153U (en) | Energy-saving device for auxiliary condenser of air cooling island | |
| CN210638322U (en) | Waste heat refrigerating system of coal-fired power plant | |
| CN207050497U (en) | Efficiently adjustable vacuum-control(led) system for power plant | |
| CN220250718U (en) | Energy-saving vacuum lifting unit with multiple back pressure condensers | |
| CN206817820U (en) | A kind of twin-stage direct-heating-type sewage source heat pump unit | |
| CN219423736U (en) | Multistage MVR evaporation economizer of zinc sulfate monohydrate sled dress | |
| CN218937076U (en) | Energy-saving gas heating system | |
| CN213450528U (en) | Combined cycle unit drainage system that low level was arranged | |
| CN214581409U (en) | Water source heat pump hot water system that waste water waste heat three-layer cascade was utilized | |
| CN220205722U (en) | Exhaust steam recycling system | |
| CN215523822U (en) | Ultra-high temperature critical water energy-saving unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |