CN215808420U - Waste heat utilization device for heating condensed water - Google Patents
Waste heat utilization device for heating condensed water Download PDFInfo
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- CN215808420U CN215808420U CN202120877396.3U CN202120877396U CN215808420U CN 215808420 U CN215808420 U CN 215808420U CN 202120877396 U CN202120877396 U CN 202120877396U CN 215808420 U CN215808420 U CN 215808420U
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- waste heat
- condensed water
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- heating
- boiler
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model provides a waste heat utilization device for heating condensed water, which comprises a waste heat boiler, wherein a low-pressure economizer is arranged in the waste heat boiler and connected with a chimney, a heat exchanger is arranged in the chimney, a hot well of the condenser is communicated with the heat exchanger through a water pipe, a water outlet of the heat exchanger is communicated with a water inlet of the low-pressure economizer, and a water outlet of the low-pressure economizer is communicated with the waste heat boiler. The utility model has the advantages that: the high-temperature flue gas exchanges heat with high-temperature condensed water through the low-pressure economizer to heat the condensed water, then the high-temperature flue gas is discharged into the chimney, and then exchanges heat with low-temperature condensed water from a hot well of the condenser through the heat exchanger in the chimney to further reduce the temperature of the flue gas, and the heated condensed water enters the low-pressure economizer along the water pipe to be heated by the flue gas, so that the flue gas is discharged after being cooled through twice heat exchange, and the high-temperature flue gas is fully utilized.
Description
Technical Field
The utility model relates to the technical field of waste heat utilization, in particular to a waste heat utilization device for heating condensed water.
Background
When the combined cycle unit operates, high-temperature flue gas discharged by the gas turbine enters the waste heat boiler to heat condensed water, and then is discharged into the atmosphere through a waste heat boiler chimney; however, the temperature of the flue gas discharged by the waste heat boiler in the combined cycle unit is still about 100 ℃, and the flue gas waste heat is wasted.
Practical new content
The technical problem to be solved by the utility model is to provide a condensed water heating device which can heat condensed water through the waste heat of flue gas so as to improve the energy utilization rate.
The utility model solves the technical problems through the following technical scheme: the utility model provides a waste heat utilization equipment for condensate heating, includes exhaust-heat boiler, be provided with the low pressure economizer in the exhaust-heat boiler, the low pressure economizer is connected with the chimney, be provided with the heat exchanger in the chimney, condenser hot-well leads to pipe and heat exchanger intercommunication, the delivery port of heat exchanger and the water inlet intercommunication of low pressure economizer, the delivery port of low pressure economizer accesss to exhaust-heat boiler.
According to the utility model, high-temperature flue gas exchanges heat with high-temperature condensed water through the low-pressure economizer to heat the condensed water, then the high-temperature flue gas is discharged into the chimney, and then exchanges heat with low-temperature condensed water from a hot well of the condenser through the heat exchanger in the chimney to further reduce the temperature of the flue gas, and the heated condensed water enters the low-pressure economizer along the water pipe to be heated by the flue gas, so that the flue gas is discharged after being subjected to twice heat exchange and temperature reduction, and the high-temperature flue gas is fully utilized.
Preferably, a condensate pump and a first regulating valve are arranged on a water pipe between the condenser hot well and the heat exchanger.
Preferably, a second regulating valve is further arranged between the heat exchanger and the low-pressure economizer.
Preferably, the heat exchanger is a low-pressure heat exchanger, the inner wall of a chimney in the low-pressure heat exchanger is arranged around the inner wall of the chimney, and the flue gas passes through the middle of an annular passage formed by the heat exchanger.
Preferably, the waste heat boiler further comprises a combustion chamber at the bottom of the waste heat boiler and/or an electric heating body inside the waste heat boiler.
Preferably, the waste heat boiler is provided with a steam pipeline connected with the inner cavity, and the steam pipeline is communicated to the gas turbine.
Preferably, the exhaust-heat boiler is further connected with a heating boiler through a water pump, and the heating boiler can heat the condensed water again.
Preferably, the following components: and a steam pipeline connected with the inner cavity is arranged on the heating boiler and communicated to the gas turbine.
The waste heat utilization device for heating the condensed water has the advantages that: the high-temperature flue gas exchanges heat with high-temperature condensed water through the low-pressure economizer to heat the condensed water, then the high-temperature flue gas is discharged into the chimney, and then exchanges heat with low-temperature condensed water from a hot well of the condenser through the heat exchanger in the chimney to further reduce the temperature of the flue gas, and the heated condensed water enters the low-pressure economizer along the water pipe to be heated by the flue gas, so that the flue gas is discharged after being cooled through twice heat exchange, and the high-temperature flue gas is fully utilized. The condensed water can be heated to a set temperature through an additional combustion chamber, an electric heating body or a heating boiler, and the steam is introduced into the steam turbine through the steam pipeline to do work, so that the cyclic utilization and low-energy-consumption heating of the condensed water are realized.
Drawings
Fig. 1 is a schematic diagram of a waste heat utilization device for heating condensed water according to embodiment 1 of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described below in detail and completely with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1, the embodiment provides a waste heat utilization device for heating condensed water, including exhaust-heat boiler 1, be provided with low-pressure economizer 2 in the exhaust-heat boiler 1, low-pressure economizer 2 is connected with chimney 4, be provided with heat exchanger 41 in the chimney 4, condenser hot-well 3 passes through water pipe 5 and heat exchanger 41 intercommunication, and the delivery port of low-pressure economizer 2 accesss to exhaust-heat boiler 1.
In this embodiment, high temperature flue gas exchanges heat with high temperature condensate through low pressure economizer 2 earlier, heats the condensate, then discharges into chimney 4, exchanges heat with the low temperature condensate that comes from condenser hot-well 3 again through heat exchanger 41 in chimney 4, further reduces the flue gas temperature, and the condensate after being heated enters into low pressure economizer 2 along water pipe 5 and is heated by the flue gas to make the flue gas discharge after two heat exchanges cooling, make full use of high temperature flue gas.
A condensate pump 51 and a first regulating valve 52 are arranged on the water pipe 5 between the condenser hot well 3 and the heat exchanger 41, condensate is pressurized through the condensate pump 51, the flow rate is regulated through the first regulating valve 52, and then the condensate enters the heat exchanger 41, and a second regulating valve 53 is further arranged on the water pipe 5 between the heat exchanger 41 and the low-pressure economizer 2 so as to regulate the flow rate of the condensate entering the low-pressure economizer 2 according to requirements.
Example 2
The present embodiment is different from embodiment 1 in that heating the condensed water only by using waste heat does not ensure heating the water to a proper temperature, and therefore, other heating methods may be provided for the waste heat boiler 1, such as heating the condensed water by a combustion chamber provided at the bottom of the waste heat boiler 1 or an electric heating body provided inside the waste heat boiler 1. The condensed water may be introduced from the waste heat boiler 1 into a heating boiler dedicated to heating through a water pump (not shown) or other power equipment, and then heated by the heating boiler, so as to prevent the smoke passing through the low-pressure economizer 2 from being heated again when the waste heat boiler is heated.
The heated condensed water can generate steam, in the preferred embodiment, a steam pipeline can be directly arranged on the waste heat boiler 1 or the heating boiler, and the steam is conveyed to the gas turbine through the steam pipeline to do work, so that the cyclic utilization of the condensed water is realized, the energy consumption of the steam turbine is reduced, and the economical efficiency is improved.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A waste heat utilization equipment for condensate heating which characterized in that: the waste heat boiler is characterized by comprising a waste heat boiler, wherein a low-pressure economizer is arranged in the waste heat boiler and connected with a chimney, a heat exchanger is arranged in the chimney, a condenser hot well is communicated with the heat exchanger through a water pipe, a water outlet of the heat exchanger is communicated with a water inlet of the low-pressure economizer, and a water outlet of the low-pressure economizer is communicated with the waste heat boiler.
2. The waste heat utilization device for heating condensed water according to claim 1, characterized in that: and a condensate pump and a first regulating valve are arranged on a water pipe between the condenser hot well and the heat exchanger.
3. The waste heat utilization device for heating condensed water according to claim 2, characterized in that: and a second regulating valve is also arranged between the heat exchanger and the low-pressure economizer.
4. The waste heat utilization device for heating condensed water according to claim 1, characterized in that: the heat exchanger is a low-pressure heat exchanger, the inner wall of a chimney in the low-pressure heat exchanger is arranged around the inner wall of the chimney, and flue gas passes through the middle of an annular passage formed by the heat exchanger.
5. The waste heat utilization device for heating condensed water according to claim 1, characterized in that: the waste heat boiler also comprises a combustion chamber at the bottom of the waste heat boiler and/or an electric heating body in the waste heat boiler.
6. The waste heat utilization device for heating condensed water according to claim 5, characterized in that: and a steam pipeline connected with the inner cavity is arranged on the waste heat boiler and communicated to the gas turbine.
7. The waste heat utilization device for heating condensed water according to claim 1, characterized in that: the waste heat boiler is further connected with a heating boiler through a water pump, and the heating boiler can heat the condensed water again.
8. The waste heat utilization device for heating condensed water according to claim 7, wherein: and a steam pipeline connected with the inner cavity is arranged on the heating boiler and communicated to the gas turbine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120877396.3U CN215808420U (en) | 2021-04-26 | 2021-04-26 | Waste heat utilization device for heating condensed water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120877396.3U CN215808420U (en) | 2021-04-26 | 2021-04-26 | Waste heat utilization device for heating condensed water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215808420U true CN215808420U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120877396.3U Active CN215808420U (en) | 2021-04-26 | 2021-04-26 | Waste heat utilization device for heating condensed water |
Country Status (1)
| Country | Link |
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| CN (1) | CN215808420U (en) |
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2021
- 2021-04-26 CN CN202120877396.3U patent/CN215808420U/en active Active
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