CN108266341A - A kind of multi-energies hybrid power generating system and method using the pre- hot condensed water of GEOTHERMAL WATER - Google Patents

Abstract

A multi-energy complementary power generation system and method for preheating condensed water by using geothermal water, the system includes a solar concentrating heat collector, a superheater and a steam generator connected in turn to the heat transfer medium outlet of the solar concentrating heat collector And the preheater, the heat transfer working medium outlet of the preheater is connected with the heat transfer working medium inlet of the solar collector; the feed water outlet of the condenser is connected to the condensate pump, the geothermal water heater, the deaerator and the feed water pump in sequence , high-pressure heater, preheater, steam generator, superheater and steam turbine, the steam turbine is connected to the generator; the exhaust port of the steam turbine is connected to the exhaust inlet of the condenser, and the second steam extraction port of the steam turbine is connected to the extraction steam of the deaerator Inlet, the third steam extraction port of the steam turbine is connected to the steam extraction inlet of the geothermal water heater, the first steam extraction port of the steam turbine is connected to the steam extraction inlet of the high-pressure heater; the drain outlet of the high-pressure heater is connected to the drain inlet of the deaerator ; The invention also discloses the multi-energy complementary power generation method of the system; the purpose of joint and efficient utilization of renewable energy is realized.

Description

A multi-energy complementary power generation system and method using geothermal water to preheat condensed water

technical field

The invention belongs to the technical field of solar thermal power generation, and in particular relates to a multi-energy complementary power generation system and method for preheating condensed water by using geothermal water.

Background technique

Both solar power generation and geothermal power generation are renewable clean energy power generation, but both have obvious defects. The cost of concentrating solar energy is high, and the power generation is limited by the instability of radiation intensity; while the cost of geothermal power generation is low, the power generation is limited by the maximum temperature, and the efficiency is not high. For geothermal energy, introducing a high-grade energy as its top cycle will benefit the power output of the original system and improve the thermal efficiency of the system to a certain extent; while for solar energy, geothermal energy is a stable energy output, which will be able to overcome Because the power generation output caused by unstable solar radiation is unstable, and the investment of geothermal energy is lower than that of solar energy, the combined cycle can share some equipment, so it is also advantageous from the perspective of cost. Therefore, the joint operation of solar energy and geothermal energy will be a way to efficiently utilize renewable energy, and it is also a manifestation of the principle of multi-level utilization of energy.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a multi-energy complementary power generation system and method for preheating condensed water by using geothermal water, so as to achieve the purpose of joint and efficient utilization of renewable energy.

In order to achieve the above object, the present invention adopts following technical scheme:

A multi-energy complementary power generation system using geothermal water to preheat condensed water, comprising a solar concentrating heat collector 1, a superheater 10 and a steam generator 9 connected in turn to the heat transfer medium outlet of the solar concentrating heat collector 1 And the preheater 8, the heat transfer working medium outlet of the preheater 8 is communicated with the heat transfer working medium inlet of the solar concentrator heat collector 1;

It also includes a condenser 4, the feed water outlet of the condenser 4 is sequentially connected to the condensate pump 11, the geothermal water heater 5, the deaerator 7, the feed water pump 12, the high pressure heater 6, the preheater 8, the steam generator 9, the superheater Device 10 and steam turbine 2, steam turbine 2 is connected with generator 3; The exhaust port of described steam turbine 2 is connected with the exhaust inlet of condenser 4, and the second extraction port of steam turbine 2 is connected with the extraction steam inlet of deaerator 7, and steam turbine 2 The third extraction port of the steam turbine 2 is connected to the steam extraction inlet of the geothermal water heater 5, and the first steam extraction port of the steam turbine 2 is connected to the extraction steam inlet of the high-pressure heater 6; the drain outlet of the high-pressure heater 6 is connected to the deaerator 7's hydrophobic inlet;

It also includes a geothermal well 13, the geothermal water outlet of the geothermal well 13 is connected to the geothermal water inlet of the geothermal water heater 5, and the geothermal water outlet of the geothermal water heater 5 is connected to the geothermal water inlet of the reinjection well 14.

The multi-energy complementary power generation method of the multi-energy complementary power generation system using geothermal water to preheat the condensed water uses the solar concentrating heat collector 1 to gather solar thermal energy, and heats the heat transfer working medium, and the heat transfer working medium is successively overheated 10, steam generator 9 and preheater 8, transfer the heat to the working medium feed water, and then return to the solar collector 1; the feed water condensed by the condenser 4, after being boosted by the condensate pump 11, is discharged to the ground The hot water heater 5 is preheated by the geothermal water, then enters the deaerator 7, gathers with the regenerative steam extraction, and drains, then boosts the pressure in the feed water pump 12, enters the high pressure heater 6, and then passes through the preheater in turn 8. The steam generator 9 and the superheater 10 are heated by the heat transfer medium to become superheated steam, enter the steam turbine 2 to push the blades to do work, and then drive the generator 3 to generate electricity; the steam after work is discharged from the exhaust port at the lower part of the steam turbine 2, and then Condensate in the condenser 4 and re-condense into water to complete a cycle; geothermal water comes out of the geothermal well 13, heats the condensed water in the geothermal water heater 5, and then refills into the refill well 14.

Compared with the prior art, the present invention has the following advantages:

1. Geothermal water is used as the heat source of the low-pressure heater, the low-pressure steam extraction of the steam turbine is canceled, and the work of the steam turbine is increased.

2. The grade of low-temperature and low-pressure geothermal water has been improved by using the solar thermal power generation system, which is equivalent to generating higher temperature and pressure steam into the steam turbine to do work.

3. The present invention is widely applicable to various solar thermal power generation systems, such as trough-type, tower-type, dish-type, and linear Fresnel-type solar thermal power generation systems.

Description of drawings

Fig. 1 is a flow chart of the multi-energy complementary power generation system and method for preheating condensed water using geothermal water according to the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

As shown in Figure 1, the multi-energy complementary power generation system utilizing geothermal water to preheat condensed water in the present invention includes: a solar concentrating heat collector 1, which is sequentially connected to the superheating system at the outlet of the heat transfer working medium of the solar concentrating heat collector 1 Device 10, steam generator 9 and preheater 8, the heat transfer working medium outlet of the preheater communicates with the solar concentrating heat collector 1 heat transfer working medium inlet;

It also includes a condenser 4, the feed water outlet of the condenser 4 is sequentially connected to the condensate pump 11, the geothermal water heater 5, the deaerator 7, the feed water pump 12, the high pressure heater 6, the preheater 8, the steam generator 9, the superheater Device 10 and steam turbine 2, steam turbine 2 is connected with generator 3; The exhaust port of described steam turbine 2 is connected with the exhaust inlet of condenser 4, and the second extraction port of steam turbine 2 is connected with the extraction steam inlet of deaerator 7, and steam turbine 2 The third extraction port of the steam turbine 2 is connected to the steam extraction inlet of the geothermal water heater 5, and the first steam extraction port of the steam turbine 2 is connected to the extraction steam inlet of the high-pressure heater 6; the drain outlet of the high-pressure heater 6 is connected to the deaerator 7's hydrophobic inlet;

It also includes a geothermal well 13, the geothermal water outlet of the geothermal well 13 is connected to the geothermal water inlet of the geothermal water heater 5, and the geothermal water outlet of the geothermal water heater 5 is connected to the geothermal water inlet of the recharge well 14 .

As shown in Figure 1, the present invention utilizes geothermal water to preheat the condensed water multi-energy complementary power generation method, utilizes the solar concentrating heat collector 1 to collect solar thermal energy, and heats the heat transfer working medium, and the heat transfer working medium is successively overheated 10, steam generator 9 and preheater 8, transfer the heat to the working medium feed water, and then return to the solar collector 1; the feed water condensed by the condenser 4, after being boosted by the condensate pump 11, is discharged to the ground The hot water heater 5 is preheated by the geothermal water, then enters the deaerator 7, gathers with the regenerative steam extraction, and drains, then boosts the pressure in the feed water pump 12, enters the high pressure heater 6, and then passes through the preheater in turn 8. The steam generator 9 and the superheater 10 are heated by the heat transfer medium to become superheated steam, enter the steam turbine 2 to push the blades to do work, and then drive the generator 3 to generate electricity; the steam after work is discharged from the exhaust port at the lower part of the steam turbine 2, and then Condensate in the condenser 4 and re-condense into water to complete a cycle; geothermal water comes out of the geothermal well 13, heats the condensed water in the geothermal water heater 5, and then refills into the refill well 14.

Claims (2)

1. a kind of multi-energies hybrid power generating system using the pre- hot condensed water of GEOTHERMAL WATER, it is characterised in that：Including Salar light-gathering collection Hot device (1), be connected in turn solar concentrating collector (1) heat-transfer working medium outlet superheater (10), steam generator (9) and Preheater (8), the heat-transfer working medium outlet of preheater (8) are connected with solar concentrating collector (1) heat-transfer working medium entrance；

Further include condenser (4), the feedwater outlet of condenser (4) be sequentially connected condensate pump (11), underground heat water heater (5), Oxygen-eliminating device (7), feed pump (12), high-pressure heater (6), preheater (8), steam generator (9), superheater (10) and steam turbine (2), steam turbine (2) connection generator (3)；The exhaust entrance of the steam drain connection condenser (4) of the steam turbine (2), steamer The extraction entrance of the second extraction opening connection oxygen-eliminating device (7) of machine (2), the third extraction opening connection GEOTHERMAL WATER heating of steam turbine (2) The extraction entrance of high-pressure heater (6) is stated in the extraction entrance of device (5), the first extraction opening connection of steam turbine (2)；The high pressure adds The hydrophobic entrance of the hydrophobic outlet connection oxygen-eliminating device (7) of hot device (6)；

Further include geothermal well (13), the underground heat water inlet of the underground heat water out connection underground heat water heater (5) of geothermal well (13), ground The underground heat water out of hot-water heater (5) connects back to the underground heat water inlet of Guan Jing (14).

2. using the electricity-generating method of providing multiple forms of energy to complement each other of the multi-energies hybrid power generating system of the pre- hot condensed water of GEOTHERMAL WATER described in claim 1, It is characterized in that：Assemble solar thermal energy, and heat-transfer working medium is heated using solar concentrating collector (1), heat-transfer working medium is successively By superheater (10), steam generator (9) and preheater (8), working medium feedwater is transferred heat to, solar energy is then back to and gathers Light heat collector (1)；By condenser (4) condensed feedwater, after condensate pump (11) boosting, in underground heat water heater (5) It is middle to be preheated by GEOTHERMAL WATER, subsequently into oxygen-eliminating device (7), with regenerative steam, it is hydrophobic collect, then boost in feed pump (12), Into high-pressure heater (6), added then in turn through preheater (8), steam generator (9) and superheater (10) by heat-transfer working medium Heat pushes blade acting into steam turbine (2), then generator (3) is driven to generate electricity into superheated steam；Steam after acting from The steam drain discharge of steam turbine (2) lower part, condenses, regelation Cheng Shui in condenser (4), completes a cycle；GEOTHERMAL WATER It is come out from geothermal well (13), the heat-setting water in underground heat water heater (5), then recharge to inverted well (14).