CN216077238U - Energy-saving steam turbine power generation device - Google Patents
Energy-saving steam turbine power generation device Download PDFInfo
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- CN216077238U CN216077238U CN202122755265.0U CN202122755265U CN216077238U CN 216077238 U CN216077238 U CN 216077238U CN 202122755265 U CN202122755265 U CN 202122755265U CN 216077238 U CN216077238 U CN 216077238U
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Abstract
The invention discloses an energy-saving steam turbine power generation device, and aims to provide an energy-saving steam turbine power generation device capable of extracting heat energy in cooling water for power generation. The system comprises a steam-water system, a low-temperature heater, a water feeding pump, a boiler and a superheater, wherein the low-temperature heater is a heat pump, the heat pump comprises an evaporator, a compressor, a throttle valve and a condenser, a condensed water channel outlet of the condenser, the condensed water pump, a condensed water channel of the heat pump condenser and the water feeding pump are sequentially connected, and a heat exchange device is arranged between the heat pump evaporator and a cooling water channel of the condenser. The invention is suitable for condensing steam type thermal power plants.
Description
Technical Field
The invention relates to a steam turbine power generation system, in particular to a steam-water device of the steam turbine power generation system.
Background
The existing condensing thermal power generation system is based on the Rankine cycle principle, and a power steam-water system of the existing condensing thermal power generation system comprises a boiler, a superheater, a steam turbine, a condenser, a condensate pump, a low-temperature heater and a feed pump. The working principle of the power steam-water system is as follows: the method comprises the steps that water is heated into steam in a boiler, the steam firstly enters a superheater and is changed into high-temperature high-pressure steam, then enters a steam turbine to push blades of the steam turbine to do work and generate power, then leaves the steam turbine and is changed into exhaust steam, then enters a condenser, the exhaust steam is cooled by cooling water in the condenser and is condensed into condensed water, the condensed water leaves the condenser, then enters a low-temperature heater through a condensed water pump to be preheated, is pressurized by a water feeding pump, and finally enters the boiler to be heated into steam, and the cycle is repeated and continuously circulated. In this cycle, on one hand, the water is changed into high-temperature and high-pressure steam by consuming fuel, so as to increase the inlet pressure of the steam turbine; on the other hand, cooling water is used for taking away a large amount of heat energy of the dead steam, the dead steam is changed into condensed water, and the temperature of the condensed water is reduced, so that the outlet pressure of the steam turbine is reduced. The disadvantages of such a power generation system are: a large amount of heat energy carried by cooling water is difficult to recycle, energy is wasted and the environment is polluted by direct discharge, and the heat energy is very difficult to release, so that the efficiency of the steam turbine is directly influenced.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an energy-saving steam turbine power generation device, which can extract heat energy in cooling water and convey the heat energy into condensed water for power generation, thereby improving the power generation efficiency, reducing the environmental pollution and saving energy.
In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides an energy-conserving turbo power generation device, includes that the steam-water system comprises steam turbine, condenser, circulating water pump, condensate pump, low temperature heater, feed pump, boiler and over heater, low temperature heater is the heat pump, the heat pump comprises evaporimeter, compressor, choke valve, condenser condensate passage export the condensate pump the condensate passage of heat pump condenser the feed pump connects gradually the heat pump evaporimeter with be provided with heat exchange device between the condenser cooling water passageway.
The invention can also: the heat pump can be an air source heat pump or a water source heat pump. The heat exchange device can select air as a heat transfer medium and can also select water as the heat transfer medium. The heat exchange device can be composed of a circulating water pump, a condenser cooling water channel, a water source heat pump evaporator and cooling water, wherein the circulating water pump, the condenser cooling water channel, the circulating water channel of the water source heat pump evaporator and the circulating water pump are sequentially connected into a closed loop, and the cooling water is sealed in the closed loop. Air cooling towers can be connected in parallel at two ends of a circulating water channel of the water source heat pump evaporator. The power of the water source heat pump is matched with the working temperature of the working medium of the water source heat pump, the water source heat pump has enough capacity to carry away heat in cooling water and control the temperature of the cooling water, and therefore the water source heat pump is guaranteed to work within an allowable working temperature range. When the power of a single water source heat pump can not meet the problem of actual needs, a plurality of water source heat pumps can be used in parallel, namely: the water source heat pump is composed of more than two sets of water dividing source heat pumps, and the more than two sets of water dividing source heat pumps are connected in parallel.
Compared with the prior art, the invention has the beneficial effects that: the heat pump extracts heat energy carried in cooling water and sends the heat energy to condensed water for power generation, and energy is saved; the heat energy discharged to the environment by cooling water is reduced, and the environment is protected; the power of the heat pump is matched with the working temperature of the working medium of the heat pump, namely the heat pump has enough capacity to carry away the heat energy of the cooling water, and the temperature is controlled, so that the heat pump is ensured to work within an allowable temperature range; and fourthly, carrying away heat energy from the dead steam, so that the saturation temperature and pressure of the dead steam at the outlet of the steam turbine can be reduced, and the pressure difference of the steam turbine is increased, thereby improving the efficiency of the steam turbine generator unit.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a water source heat pump steam-water system;
fig. 2 is a schematic diagram of a water-steam system with a water source heat pump and an air cooling tower connected in parallel.
In the figure: the exhaust steam 1 condenser 2 cooling water 3 circulating water pump 4 condensate pump 5 evaporator 6 compressor 7 throttle valve 8 condenser 9 water pump 10 air cooling tower 11.
Detailed Description
Case one:
in fig. 1, a steam-water system of an energy-saving steam turbine power generation device is composed of a steam turbine, a condenser 2, a circulating water pump 4, a condensate pump 5, a heat pump, a feed pump 10, a boiler and a superheater, wherein the heat pump is composed of a compressor 7, a condenser 9, a throttle valve 8 and an evaporator 6. The outlet of the condensed water channel of the condenser 2, the condensed water pump 5, the condensed water channel of the condenser 9, the feed water pump, the boiler, the superheater, the steam turbine and the inlet of the exhaust steam 1 of the condenser 2 are connected in sequence. The outlet of the circulating water pump 4, the cooling water channel of the condenser 2, the circulating water channel of the evaporator 6 and the inlet of the circulating water pump 4 are sequentially connected in a closed manner to form a closed cooling water circulating loop, and the cooling water 3 is arranged in the closed cooling water circulating loop.
In this device, the heat pump can absorb the heat of cooling water 3 in the evaporimeter 6 to carry these heats for the condensate water that gets into in the condenser 9 and preheat, the condensate water after preheating gets into the boiler through feed pump 10 and becomes steam, then gets into the over heater and becomes high temperature high pressure steam, reentrant steam turbine does work, and the steam turbine drives the generator electricity generation, thereby the energy saving reduces heat and discharges. In addition, the power of the heat pump is matched with the working temperature of the working medium of the heat pump by increasing the power of the heat pump or reducing the flow of the cooling water 3, namely, the heat pump has enough capacity to carry away the heat of the cooling water 3 in the evaporator 6, thereby controlling the temperature of the evaporator and ensuring that the heat pump works in a normal working temperature range. Meanwhile, the cooling water 3 can take away the heat of the exhaust steam in the condenser 2, so that the pressure of the condenser 2 can be reduced, and the efficiency of the steam turbine can be improved.
Case two:
in fig. 2, a steam-water system of an energy-saving steam turbine power generation device is composed of a steam turbine, a condenser 2, a circulating water pump 4, a condensate pump 5, a heat pump, an air cooling tower 11, a feed water pump 10, a boiler and a superheater, wherein the heat pump is composed of a compressor 7, a condenser 9, a throttle valve 8 and an evaporator 6. The outlet of the condensed water channel of the condenser 2, the condensed water pump 5, the condensed water channel of the condenser 9, the feed pump 10, the boiler, the superheater, the steam turbine and the inlet of the exhaust steam 1 of the condenser 2 are connected in sequence. The outlet of the circulating water pump 4 is connected with the cooling water channel inlet of the condenser 2, the cooling water channel outlet of the condenser 2 is connected with the circulating water channel inlets of the air cooling tower and the evaporator 6, the inlet of the circulating water pump 4 is connected with the circulating water channel outlets of the air cooling tower and the evaporator 6, so that a closed cooling water circulating loop is formed, and the cooling water 3 circulates in the closed cooling water circulating loop.
In the arrangement of fig. 2, the heat pump can absorb heat from the cooling water 3 in the evaporator 6 and transfer this heat to the condensed water in the condenser 9 for power generation, thereby saving energy and reducing heat emissions. And the cooling water 3 can take away the heat of the exhaust steam in the condenser 2, reduce the temperature of the exhaust steam, reduce the pressure of the condenser 2 and further improve the efficiency of the steam turbine. In addition, the air cooling tower can also assist in solving the problem of excessive latent heat of dead steam condensation.
Claims (6)
1. The utility model provides an energy-conserving turbo power generation facility, includes that the steam-water system comprises steam turbine, condenser, circulating water pump, condensate pump, low temperature heater, feed pump, boiler and over heater, characterized by: the low temperature heater is a heat pump, the heat pump comprises an evaporator, a compressor, a throttle valve and a condenser, a condenser condensed water channel outlet is formed in the condensed water pump, a condensed water channel of the heat pump condenser and a water feeding pump are sequentially connected, and a heat exchange device is arranged between the heat pump evaporator and the condenser cooling water channel.
2. The energy-saving steam turbine generator according to claim 1, wherein: the heat pump is a water source heat pump.
3. The energy-saving steam turbine generator according to claim 2, wherein: the heat exchange device is composed of the circulating water pump, the condenser cooling water channel, the water source heat pump evaporator and cooling water, the circulating water pump, the condenser cooling water channel, the circulating water channel of the water source heat pump evaporator and the circulating water pump are sequentially connected into a closed loop, and the cooling water is sealed in the closed loop.
4. The energy-saving steam turbine generator according to claim 3, wherein: and air cooling towers are connected in parallel at two ends of a circulating water channel of the water source heat pump evaporator.
5. The energy-saving steam turbine generator according to claim 4, wherein: the power of the water source heat pump is matched with the working temperature of the working medium of the water source heat pump.
6. The energy-saving steam turbine generator according to claim 5, wherein: the water source heat pump is composed of more than two sets of water dividing source heat pumps, and the more than two sets of water dividing source heat pumps are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122755265.0U CN216077238U (en) | 2021-11-11 | 2021-11-11 | Energy-saving steam turbine power generation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122755265.0U CN216077238U (en) | 2021-11-11 | 2021-11-11 | Energy-saving steam turbine power generation device |
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| Publication Number | Publication Date |
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| CN216077238U true CN216077238U (en) | 2022-03-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122755265.0U Active CN216077238U (en) | 2021-11-11 | 2021-11-11 | Energy-saving steam turbine power generation device |
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| CN (1) | CN216077238U (en) |
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2021
- 2021-11-11 CN CN202122755265.0U patent/CN216077238U/en active Active
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