CN209783329U - Steam turbine exhaust condensing system - Google Patents
Steam turbine exhaust condensing system Download PDFInfo
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- CN209783329U CN209783329U CN201920247689.6U CN201920247689U CN209783329U CN 209783329 U CN209783329 U CN 209783329U CN 201920247689 U CN201920247689 U CN 201920247689U CN 209783329 U CN209783329 U CN 209783329U
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Abstract
the utility model discloses a steam turbine exhaust condensing system, which comprises an air cooling condenser, an axial flow blower, a liquid nitrogen tank and a pressure reducing valve; the outlet of the liquid nitrogen tank is communicated with the inlet of the pressure reducing valve; the heat exchange tube is hermetically arranged in the tube bundle of the air-cooling condenser in a penetrating manner, the air outlet of the pressure reducing valve is communicated with the air inlet of the heat exchange tube, and the air outlet of the heat exchange tube is arranged outside the air-cooling condenser. The advantages are that: the liquid nitrogen tank stores high-pressure liquid nitrogen, carries out the in-process of forced air cooling to the air cooling condenser through the axial-flow blower, and high-pressure liquid nitrogen becomes the gaseous state after the relief pressure valve, and nitrogen gas makes the steam condense to the comdenstion water through the heat exchange tube with the steam heat transfer in the air cooling condenser to this heat exchange efficiency who improves the air cooling condenser for the condensation rate of steam has reduced investment cost.
Description
The technical field is as follows:
The utility model relates to a heat exchange equipment technical field, in particular to steam turbine steam extraction condensing system.
Background art:
High temperature in the thermal power system, high-pressure steam promotes to form low-pressure steam after the steam turbine does work, the process requirement cools off it for the condensate water, traditionally adopt the water chiller to cool off low-pressure steam for the condensate water, but the water consumption is great, at present adopt the air cooling condenser to cool off in order to practice thrift the water consumption usually, current air cooling condenser is for being the finned tube bank that "chevron shape" arranged, and arranged the axial-flow blower under the finned tube bank, steam turbine exhaust steam flows into two rows of finned tube banks from the steam chamber of arranging on finned tube bank top in, the air runner is formed to the air current that is formed by the axial-flow blower between the fin on tube bank, thereby make the steam in the finned tube bank and the air of finned tube bank outer wall carry out the heat exchange, and then make steam condensate to water, recycle.
But under the condition of high temperature in summer, the difference in temperature of steam and outside air is less, lead to air cooling condenser heat exchange efficiency low, in order to improve the heat transfer effect, take the measure that increases finned tube bank quantity usually in order to increase heat transfer area, but so lead to the investment cost to increase, or take the measure that the demineralized water regularly washed the air cooling condenser, but the demineralized water combines with the dust on air cooling condenser heat transfer surface easily, moisture is heated the evaporation and the dirt can be attached to air cooling condenser heat transfer surface and the scale deposit, lead to reducing air cooling condenser's heat exchange capacity from this, still do not play the effect that is showing to improving heat transfer effect.
The utility model has the following contents:
An object of the utility model is to provide an improve air cooling condenser heat exchange efficiency and reduce investment cost's steam turbine steam extraction condensing system.
The utility model discloses by following technical scheme implement: the steam turbine exhaust condensing system comprises an air cooling condenser, an axial flow blower, a liquid nitrogen tank and a pressure reducing valve; the outlet of the liquid nitrogen tank is communicated with the inlet of the pressure reducing valve; the air cooling condenser is characterized in that a heat exchange tube is hermetically arranged in a tube bundle of the air cooling condenser in a penetrating mode, the gas outlet of the pressure reducing valve is communicated with the gas inlet of the heat exchange tube, and the gas outlet of the heat exchange tube is arranged outside the air cooling condenser.
Further, the heat exchange tube is a serpentine coil.
Further, the gas outlet of relief pressure valve with the pipeline facial make-up between the air inlet of heat exchange tube is equipped with the electronic trip valve, the comdenstion water export of air cooling condenser is equipped with temperature sensor, temperature sensor is connected with the input electricity of controller, the output of controller with the electronic trip valve electricity is connected.
The heat exchange tube is characterized by further comprising an air injection tube arranged in parallel with the tube bundle of the air-cooled condenser, the air injection tube is arranged outside the air-cooled condenser, an air outlet of the heat exchange tube is communicated with one end of the air injection tube, and the other end of the air injection tube is sealed; and a plurality of nozzles are communicated with one side of the gas injection pipe adjacent to the air-cooled condenser.
Furthermore, the air outlet of the nozzle is covered with an air dispersing cover in a sealing way, and the air dispersing cover is provided with a plurality of air injection holes.
Furthermore, a heat tracing band is wound on a pipeline between the outlet of the liquid nitrogen tank and the inlet of the heat exchange tube.
the utility model has the advantages that: the liquid nitrogen tank stores high-pressure liquid nitrogen, carries out the in-process of forced air cooling to the air cooling condenser through the axial-flow blower, and high-pressure liquid nitrogen becomes the gaseous state after the relief pressure valve, and nitrogen gas makes the steam condense to the comdenstion water through the heat exchange tube with the steam heat transfer in the air cooling condenser to this heat exchange efficiency who improves the air cooling condenser for the condensation rate of steam has reduced investment cost.
Description of the drawings:
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
The parts in the drawings are numbered as follows: the device comprises an air-cooled condenser 1, an axial-flow blower 2, a liquid nitrogen tank 3, a pressure reducing valve 4, a heat exchange tube 5, an electric cut-off valve 6, a temperature sensor 7, a controller 8, an air injection tube 9, a nozzle 10, an air dispersing cover 11, an air injection hole 12 and a heat tracing band 13.
the specific implementation mode is as follows:
As shown in fig. 1 and 2, the steam turbine exhaust condensing system includes an air-cooled condenser 1 and an axial flow blower 2, and further includes a liquid nitrogen tank 3 and a pressure reducing valve 4; an outlet of the liquid nitrogen tank 3 is communicated with an inlet of the pressure reducing valve 4; a heat exchange tube 5 is hermetically penetrated in a tube bundle of the air-cooled condenser 1, an air outlet of the pressure reducing valve 4 is communicated with an air inlet of the heat exchange tube 5, and an air outlet of the heat exchange tube 5 is arranged outside the air-cooled condenser 1; there is high-pressure liquid nitrogen in 3 internal storages of liquid nitrogen container, carry out the in-process of forced air cooling to air cooling condenser 1 through axial-flow blower 2, high-pressure liquid nitrogen becomes the gaseous state after relief pressure valve 4, nitrogen gas is through the steam heat transfer in heat exchange tube 5 and the air cooling condenser 1, make the steam condense to the comdenstion water, with this heat exchange efficiency who improves air cooling condenser 1, accelerate the condensation rate of steam, the investment cost has been reduced, and simultaneously, the nitrogen gas in the heat exchange tube 5 rises with steam heat transfer after-temperature, can prevent effectively that nitrogen gas from taking place to freeze the phenomenon and stopping up heat exchange tube 5 at the pipeline in-process that.
The heat exchange tube 5 is coiled pipe, and the heat exchange tube 5 is set to coiled pipe, so that the pressure of nitrogen flowing in the heat exchange tube 5 can be effectively reduced, the nitrogen can be prevented from freezing in the heat exchange tube 5, the heat exchange area of the heat exchange tube 5 and steam is increased, and the heat exchange efficiency is improved.
An electric cut-off valve 6 is arranged on a pipeline between an air outlet of the pressure reducing valve 4 and an air inlet of the heat exchange pipe 5, a condensed water outlet of the air-cooled condenser 1 is provided with a temperature sensor 7, the temperature sensor 7 is electrically connected with an input end of a controller 8, and an output end of the controller 8 is electrically connected with the electric cut-off valve 6; the temperature sensor 7 can detect the temperature of the condensed water of the air-cooled condenser 1 in real time and feed the temperature back to the controller 8 in real time, and when the detected temperature is lower than a set value, the controller 8 controls the electric cut-off valve 6 to be closed and stops introducing nitrogen into the heat exchange tube 5, so that the use amount of the nitrogen is reduced, and the investment cost is reduced; when the temperature that detects surpassed the setting value, controller 8 control electronic trip valve 6 was opened, carries out the heat transfer through the steam in nitrogen gas and the air cooling condenser 1, makes the steam cooling condensation, improves heat exchange efficiency.
The heat exchange tube further comprises an air injection tube 9 arranged in parallel with the tube bundle of the air-cooled condenser 1, the air injection tube 9 is arranged outside the air-cooled condenser 1, an air outlet of the heat exchange tube 5 is communicated with one end of the air injection tube 9, and the other end of the air injection tube 9 is sealed; a plurality of nozzles 10 are communicated with one side of the gas injection pipe 9 adjacent to the air-cooled condenser 1; the nitrogen sprayed by the nozzle 10 can sweep dust and sundries on the outer surface of the air-cooled condenser 1, so that the cleanness of the outer surface of the air-cooled condenser 1 is ensured, the heat dissipation capacity of the air-cooled condenser 1 is improved, and the heat exchange between steam in the air-cooled condenser 1 and outside air is facilitated; meanwhile, the nitrogen sprayed from the nozzle 10 can further cool the outer wall of the air-cooled condenser 1, and further is favorable for heat exchange with steam in the air-cooled condenser 1.
the air outlet of the nozzle 10 is covered with an air dispersing cover 11 in a closed manner, and the air dispersing cover 11 is provided with a plurality of air injection holes 12; can make nozzle 10 spun nitrogen gas more disperse through gas dispersing cover 11, be favorable to reducing the air temperature of surrounding environment, in 2 working processes of axial-flow blower, stir the air around the air condenser 1, and then more be favorable to reducing the temperature of air condenser 1, improve heat exchange efficiency.
A heat tracing band 13 is wound on a pipeline between the outlet of the liquid nitrogen tank 3 and the inlet of the heat exchange tube 5, and nitrogen coming out of the liquid nitrogen tank 3 can be preheated through the heat tracing band 13, so that the nitrogen is effectively prevented from being frozen.
Instructions for use: the initial condition is for carrying out the forced air cooling to air cooling condenser 1 through axial-flow blower 2, relief pressure valve 4 is in the open mode, electronic trip valve 6 is in the closed condition, simultaneously through the temperature of temperature sensor 7 real-time detection air cooling condenser 1's comdenstion water export, and feed back in controller 8 in real time, when the temperature that detects surpasss the setting value, controller 8 control electronic trip valve 6 is opened, high-pressure liquid nitrogen becomes the gaseous state behind relief pressure valve 4, nitrogen gas is through the heat exchange tube 5 and the steam heat transfer in the air cooling condenser 1, make steam condense to the comdenstion water, when the temperature that detects is less than the setting value, controller 8 control electronic trip valve 6 closes, stop letting in nitrogen gas in the heat exchange tube 5.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The steam turbine exhaust condensing system comprises an air cooling condenser and an axial flow blower, and is characterized by also comprising a liquid nitrogen tank and a pressure reducing valve; the outlet of the liquid nitrogen tank is communicated with the inlet of the pressure reducing valve; the air cooling condenser is characterized in that a heat exchange tube is hermetically arranged in a tube bundle of the air cooling condenser in a penetrating mode, the gas outlet of the pressure reducing valve is communicated with the gas inlet of the heat exchange tube, and the gas outlet of the heat exchange tube is arranged outside the air cooling condenser.
2. The steam turbine exhaust condensing system of claim 1 wherein said heat exchange tubes are serpentine coils.
3. The steam turbine exhaust condensing system according to claim 1, wherein an electric cut-off valve is installed on a pipeline between the air outlet of the pressure reducing valve and the air inlet of the heat exchange pipe, a temperature sensor is installed at a condensed water outlet of the air cooling condenser, the temperature sensor is electrically connected with an input end of a controller, and an output end of the controller is electrically connected with the electric cut-off valve.
4. The steam turbine exhaust condensing system according to any one of claims 1 to 3, further comprising an air injection pipe arranged in parallel with the tube bundle of the air-cooled condenser, wherein the air injection pipe is arranged outside the air-cooled condenser, the air outlet of the heat exchange pipe is communicated with one end of the air injection pipe, and the other end of the air injection pipe is arranged in a closed manner; and a plurality of nozzles are communicated with one side of the gas injection pipe adjacent to the air-cooled condenser.
5. The steam turbine exhaust condensing system according to claim 4, wherein the air outlet closing cover of the nozzle is provided with an air dispersing cover, and the air dispersing cover is provided with a plurality of air injection holes.
6. The steam turbine exhaust steam condensing system according to claim 4, wherein a heat tracing band is wound on a pipe between an outlet of said liquid nitrogen tank and an inlet of said heat exchange pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920247689.6U CN209783329U (en) | 2019-02-26 | 2019-02-26 | Steam turbine exhaust condensing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920247689.6U CN209783329U (en) | 2019-02-26 | 2019-02-26 | Steam turbine exhaust condensing system |
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| Publication Number | Publication Date |
|---|---|
| CN209783329U true CN209783329U (en) | 2019-12-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920247689.6U Active CN209783329U (en) | 2019-02-26 | 2019-02-26 | Steam turbine exhaust condensing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114272714A (en) * | 2021-12-29 | 2022-04-05 | 司少龙 | Benzene vapor condensation cooling system of debenzolization tower by using air cooler |
| CN114307216A (en) * | 2021-12-29 | 2022-04-12 | 司少龙 | Ammonia steam condensation cooling system of ammonia still utilizing air cooler |
-
2019
- 2019-02-26 CN CN201920247689.6U patent/CN209783329U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114272714A (en) * | 2021-12-29 | 2022-04-05 | 司少龙 | Benzene vapor condensation cooling system of debenzolization tower by using air cooler |
| CN114307216A (en) * | 2021-12-29 | 2022-04-12 | 司少龙 | Ammonia steam condensation cooling system of ammonia still utilizing air cooler |
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