CN217400973U

CN217400973U - Condenser directly ground cooling turbine power generation device

Info

Publication number: CN217400973U
Application number: CN202123191538.XU
Authority: CN
Inventors: 宋惠军; 宋惠民; 宋强; 宋劲松; 宋扬; 宋欢
Original assignee: Wuhan Wuqiongda Energy Technology Co ltd
Current assignee: Wuhan Wuqiongda Energy Technology Co ltd
Priority date: 2021-12-18
Filing date: 2021-12-18
Publication date: 2022-09-09
Anticipated expiration: 2031-12-18

Abstract

The invention discloses a steam turbine power generation device with a condenser directly cooled, and aims to provide a steam turbine power generation device with safe and stable power generation and higher efficiency. It includes that the steam-water system comprises steam turbine, condenser, feed pump, boiler and circulating water pump, still includes cistern and heat exchange canal, the cistern with the heat exchange canal all sets up underground, the cooling water pipeline's of condenser export, the heat exchange canal, the cistern, circulating water pump, the cooling water pipeline's of condenser import connects gradually into closed cooling water circulation loop. The invention is suitable for condensing steam type thermal power plants.

Description

Condenser directly ground cooling turbine power generation device

Technical Field

The invention relates to a steam turbine power generation system, in particular to a steam-water cooling 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: on one hand, in the condenser, after the exhaust steam is cooled by cooling water, the exhaust steam is changed into condensed water, after the condensed water leaves the condenser, the condensed water enters a low-temperature heater for preheating, and then is pressurized by a water supply pump, and finally enters the boiler to be heated into steam, so that the operation is repeated and circulated continuously; on the other hand, in the condenser, after the cooling water absorbs the heat of the exhaust steam and leaves the condenser, a large amount of heat needs to be released. In places with rich water sources, the cooling water of the power plant can be in an open type, namely, a water pump is used for taking water from the river for cooling and then discharging the water into the river. In the areas with water shortage, the cooling water of the power plant needs to adopt 'closed' circulation, namely the used cooling water is cooled by a cooling tower and then is reused. The cooling water releases heat to the atmosphere through the cooling tower, and the atmosphere is a cold end for heat dissipation. The problem with this "closed" cycle is: in summer, because the temperature is too high, the generating set can reduce the generating efficiency due to difficult heat dissipation, even alarm and halt; in winter, the generator set has the problem of freeze prevention of cooling water due to too low air temperature.

Disclosure of Invention

The invention aims to provide a steam turbine power generation device which is safe and stable in power generation and higher in efficiency.

In order to solve the technical problems, the invention adopts the following technical scheme: the utility model provides a condenser directly cools off turbo generator, includes that steam-water system comprises steam turbine, condenser, feed pump, boiler and circulating water pump, still includes cistern and heat exchange canal, the cistern with the heat exchange canal all sets up underground, the cooling water pipeline's of condenser export, the heat exchange canal, the cistern, circulating water pump, the cooling water pipeline's of condenser import connects gradually into closed cooling water circulation circuit.

The invention can also: and a geothermal heat exchange pool is arranged in the heat exchange water channel and is arranged underground. The geothermal exchange tank can also be a cold water screening tank, the cold water screening tank is provided with a water inlet, a water tank, a water outlet and a water baffle, the water baffle is arranged in front of the water outlet, and a cold water channel is arranged below the water baffle. To better create laminar flow, the cross-sectional area of the water inlet and outlet may be much smaller than the cross-sectional area of the sink. Be provided with condensate pump and low temperature heating ware between condenser and the water-feeding pump, low temperature heating ware is the heat pump, the heat pump comprises compressor, evaporimeter, choke valve and condenser, condenser condensate passage export condensate pump the condensate passage of heat pump condenser the water-feeding pump connects gradually. The heat pump evaporator channels may be connected in series into the cooling water circulation circuit, i.e.: the outlet of the heat pump evaporator, the inlet of the heat exchange water channel, the cold water screening pool, the water storage pool, the circulating water pump, the cooling water channel of the condenser and the inlet of the heat pump evaporator are sequentially connected into a closed loop; the heat pump evaporator channels may also be connected in parallel into the cooling water circulation loop, i.e.: the outlet of the heat pump evaporator is connected with the outlet of the reservoir and the inlet of the circulating water pump, and the inlet of the heat pump evaporator is connected with the inlet of the heat exchange water channel and the outlet of the cooling water channel of the condenser.

Compared with the prior art, the invention has the beneficial effects that: firstly, because the heat and the cold do not exist under the earth surface, the earth is used as a cold end, the temperature of cooling water is easy to adjust, the optimal condensing temperature can be provided for a condenser, the efficiency of a steam turbine is improved, and the safety and the stability of power generation are ensured; secondly, a cooling tower is not needed, the facility is simple, and the investment is low; thirdly, heat transfer water permeates into the soil to greatly improve the heat conductivity of the soil; because the water loss is less after the soil is saturated, and in addition, the water evaporation is less after the closed ditch circulating channel is covered, the water consumption of the system is less; independent cooling water, simple maintenance and less faults; the heat pump can absorb the heat in the exhaust steam, reduce the temperature of the condenser, reduce the pressure of the condenser and improve the efficiency of the steam turbine; and the condensed water is preheated by the heat absorbed by the heat pump, so that the fuel can be saved, and the pollution to the environment is reduced.

Drawings

The invention is further described below with reference to the accompanying drawings.

FIG. 1 is a schematic diagram of a steam turbine power plant with condenser directly cooling.

Fig. 2 is a longitudinal sectional schematic view of the cold water screening tank.

Fig. 3 is a schematic diagram of a condenser directly cooling a steam turbine power generation device and connecting a heat pump evaporator in series.

Fig. 4 is a schematic diagram of a condenser directly cooling a turbo power plant and incorporating a heat pump evaporator.

In the figure: the water inlet 1, the water tank 2, the earth 3, the cold water channel 4, the water baffle 5 and the water outlet 6 are covered by the cover plate 7.

Detailed Description

In fig. 1 and 2, a condenser direct-cooling steam turbine power generation device is composed of a steam turbine, a generator, a condenser, a feed pump, a boiler, a superheater, a circulating water pump, a heat exchange water channel, a cold water screening pool and a reservoir. The heat exchange water channel is arranged underground. The cold water screening pool is also arranged underground and is provided with a water inlet 1, a water tank 2, a cold water channel 4, a water baffle 5, a water outlet 6 and a cover plate 7, wherein the cross sectional areas of the water inlet 1 and the water outlet 6 are far smaller than the cross sectional area of the water tank 2. The outlet of a condensed water channel of the condenser, a feed pump, a boiler, a superheater, a steam turbine and an exhaust steam inlet of the condenser are connected in sequence. The export of the cooling water pipeline of condenser, the heat exchange ditch, the cistern, circulating water pump, the import of the cooling water pipeline of condenser connects gradually into closed cooling water circulation loop in the heat exchange ditch, the export that is provided with a cold water screening pond passes through the entry linkage in heat exchange ditch and three cold water screening pond, the export warp in three cold water screening pond the entry linkage in heat exchange ditch and another cold water screening pond. Tap water is provided as cooling water in the closed cooling water circulation circuit.

In the device, part of cooling water can permeate into the surrounding soil through the heat exchange water channel, the cold water screening pool and the water storage pool, the water contained in the soil can be saturated, in addition, the cover plate 7 can prevent the water from evaporating, and therefore the device can save water. On one hand, the water occupies the air in the soil, so that the heat conductivity of the soil is greatly improved, and the heat exchange between the cooling water and the ground is facilitated. On the other hand, because the cross-sectional area of the inlet and the outlet of the cold water screening pool is far smaller than that of the water tank 2, the flow velocity of water in the water tank 2 is very slow, laminar flow can be formed naturally, low-temperature cooling water below can be screened out from the lower part of the cold water screening pool through the cold water channel 4 from the water outlet 6, and high-temperature cooling water is intercepted to exchange heat with the ground, so that the heat exchange efficiency of the cooling water and the ground can be further improved.

In order to further improve the power generation efficiency and save fuel, a condensate pump and a low-temperature heater can be arranged between the condenser and the water supply pump, the low-temperature heater is a heat pump, and the heat pump consists of a compressor, an evaporator, a throttle valve and a condenser. The outlet of the condensed water channel of the condenser, the condensed water pump, the condensed water channel of the heat pump condenser and the water feeding pump are connected in sequence. As shown in fig. 3, the heat pump evaporator channels may be connected in series into the cooling water circulation loop, namely: the outlet of the heat pump evaporator, the heat exchange water channel, the cold water screening pool, the water storage pool, the circulating water pump, the cooling water channel of the condenser and the inlet of the heat pump evaporator are sequentially connected into a closed loop. As shown in fig. 4, the heat pump evaporator channels may also be connected in parallel to a cooling water circulation loop, that is: the outlet of the heat pump evaporator is connected with the outlet of the reservoir and the inlet of the circulating water pump, and the inlet of the heat pump evaporator is connected with the inlet of the heat exchange water channel and the outlet of the cooling water channel of the condenser.

After the heat pump is connected, the evaporator of the heat pump can absorb the heat of the exhaust steam in the condenser through the cooling water, the temperature of the exhaust steam is reduced, the pressure of the condenser is reduced, the efficiency of the steam turbine is improved, meanwhile, the heat absorbed by the evaporator of the heat pump can also be used for generating power by preheating condensed water through the heat pump condenser, the consumption of fuel is reduced, and in addition, the ground thermal pollution can also be reduced.

Claims

1. The utility model provides a condenser directly cools turbine power generation facility, includes that the steam-water system comprises steam turbine, condenser, feed pump, boiler and circulating water pump, characterized by: still include cistern and heat exchange ditch, the cistern with the heat exchange ditch all sets up in the underground, the export of the cooling water pipeline of condenser, the heat exchange ditch, the cistern, circulating water pump, the cooling water pipeline's of condenser import connects gradually into closed cooling water circulation circuit.

2. The condenser direct-cooling steam turbine power generation device according to claim 1, wherein: and a geothermal heat exchange pool is arranged in the heat exchange water channel and is arranged underground.

3. The condenser directly cooling the turbine power plant according to claim 2, wherein: the geothermal exchange tank is a cold water screening tank, the cold water screening tank is provided with a water inlet, a water tank, a water outlet and a water baffle, the water baffle is arranged in front of the water outlet, and a cold water channel is arranged below the water baffle.

4. The condenser directly cooling the turbine power plant according to claim 3, wherein: the cross-sectional areas of the water inlet and the water outlet are far smaller than the cross-sectional area of the water tank.

5. The condenser directly cooling the turbine power plant according to claim 4, wherein: be provided with condensate pump and heat pump between condenser and the water-feeding pump, the heat pump comprises compressor, evaporimeter, choke valve and condenser, condenser condensate passage export the condensate pump the condensate passage of heat pump condenser the water-feeding pump connects gradually, the export of heat pump evaporimeter the heat exchange ditch entry the cold water screening pond the cistern, circulating water pump the condenser cooling water passageway the import of heat pump evaporimeter connects gradually into closed loop.

6. The condenser directly cooling the turbine power plant according to claim 4, wherein: be provided with condensate pump and heat pump between condenser and the feed pump, the heat pump comprises compressor, evaporimeter, choke valve and condenser, condenser condensate passage export condensate pump the condensate passage of heat pump condenser the feed pump connects gradually, the export of heat pump evaporimeter with the cistern export and the circulating water pump import is connected, the import of heat pump evaporimeter with heat exchange ditch entry and condenser cooling water passage export is connected.