CN212406841U - Combined deoxidization system for supercritical carbon dioxide power generation system - Google Patents
Combined deoxidization system for supercritical carbon dioxide power generation system Download PDFInfo
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- CN212406841U CN212406841U CN202020988236.1U CN202020988236U CN212406841U CN 212406841 U CN212406841 U CN 212406841U CN 202020988236 U CN202020988236 U CN 202020988236U CN 212406841 U CN212406841 U CN 212406841U
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Abstract
The utility model discloses a combined deoxidization system for a supercritical carbon dioxide power generation system, which comprises a generator, a boiler, a turbine, a precooler, a low-temperature deoxidization system, a compressor and a high-temperature deoxidization system; the outlet of the boiler is communicated with the inlet of the turbine, the outlet of the turbine is communicated with the inlet of the precooler, the outlet of the precooler is communicated with the inlet of the compressor through the low-temperature deoxygenation system, the outlet of the compressor is communicated with the inlet of the boiler through the high-temperature deoxygenation system, the compressor is connected with the generator, and the system can remove oxygen in the carbon dioxide working medium.
Description
Technical Field
The utility model belongs to the technical field of supercritical carbon dioxide brayton cycle power generation, a joint deoxidization system for supercritical carbon dioxide power generation system is related to.
Background
In a steam rankine cycle power generation system, dissolved oxygen in the feedwater can affect the operational safety of the feedwater system and the overall thermodynamic system. The dissolved oxygen in the water supply can cause the punctiform corrosion of a water supply pipeline and an economizer, the roughness of the inner wall of the pipeline is increased, on one hand, the flowing resistance is increased, on the other hand, the sediment in the water supply is easy to accumulate, and the under-deposit corrosion is accelerated. If corrosion products caused by water supply and oxygen dissolution enter the boiler along with boiler feed water, the corrosion products are deposited in a region with higher heat load in the boiler, so that heat transfer of a tube panel is deteriorated, the efficiency of the boiler is reduced, the scaling rate is accelerated, even ulcerative scale is corroded, and even tube explosion is caused in severe cases, so that the safe operation of the boiler is influenced. Meanwhile, the corrosion of dissolved oxygen in the feed water to the pipeline can also increase the iron content in the steam, accelerate the scaling rate of the turbine blades, reduce the operating efficiency of the turbine and seriously affect the safe operation of the turbine.
The supercritical carbon dioxide power generation system also faces the same problem, although the system can be replaced by carbon dioxide gas for many times before starting, partial dead zones in the system still cause oxygen residue, and the carbon dioxide working medium also has a certain content of oxygen, so the supercritical carbon dioxide power generation system also faces the problem of oxygen corrosion. However, most of the oxygen removers disclosed in the prior art are used for removing dissolved oxygen in water, and few oxygen removal systems for supercritical carbon dioxide power generation systems are reported.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a joint deoxidization system for supercritical carbon dioxide power generation system, this system can realize getting rid of oxygen in the carbon dioxide working medium.
In order to achieve the purpose, the combined deoxidizing system for the supercritical carbon dioxide power generation system comprises a generator, a boiler, a turbine, a precooler, a low-temperature deoxidizing system, a compressor and a high-temperature deoxidizing system; the outlet of the boiler is communicated with the inlet of the turbine, the outlet of the turbine is communicated with the inlet of the precooler, the outlet of the precooler is communicated with the inlet of the compressor through the low-temperature deoxygenation system, the outlet of the compressor is communicated with the inlet of the boiler through the high-temperature deoxygenation system, and the compressor is connected with the generator.
The system also comprises a regenerator, wherein the outlet of the turbine is communicated with the inlet of the precooler through the hot side of the regenerator, and the outlet of the high-temperature oxygen removal system is communicated with the inlet of the boiler through the cold side of the regenerator.
The compressor, turbine and generator are arranged coaxially.
The low-temperature deoxygenation system is formed by connecting a plurality of low-temperature deoxygenators in parallel.
The high-temperature deoxygenation system is formed by connecting a plurality of high-temperature deoxygenators in parallel.
The deoxidant in the low-temperature deaerator is sponge iron, and the deoxidant in the high-temperature deaerator is a nickel-series chemical absorption deoxidant, a manganese-series chemical absorption deoxidant or an iron-series chemical absorption deoxidant.
The utility model discloses following beneficial effect has:
when the combined deoxidization system for the supercritical carbon dioxide power generation system is specifically operated, carbon dioxide enters the low-temperature deoxidization system after being cooled by the precooler and contacts with deoxidant in the low-temperature deoxidization system, and oxygen in the carbon dioxide reacts with the deoxidant to reduce the content of oxygen; the compressed carbon dioxide is contacted with a deoxidant in the high-temperature deoxidization system, and oxygen in the carbon dioxide reacts with the deoxidant, so that the oxygen content is further reduced.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a medium-low temperature oxygen removal system 5 of the present invention;
fig. 3 is a schematic structural diagram of the medium-high temperature oxygen removal system 7 of the present invention.
Wherein, 1 is a boiler, 2 is a turbine, 3 is a heat regenerator, 4 is a precooler, 5 is a low-temperature deoxygenation system, 51 is a low-temperature deoxygenation device, 6 is a compressor, 7 is a high-temperature deoxygenation system, 71 is a high-temperature deoxygenation device, and 8 is a generator.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the combined deoxygenation system for a supercritical carbon dioxide power generation system according to the present invention includes a generator 8, a boiler 1, a turbine 2, a precooler 4, a low-temperature deoxygenation system 5, a compressor 6, and a high-temperature deoxygenation system 7; the outlet of the boiler 1 is communicated with the inlet of the turbine 2, the outlet of the turbine 2 is communicated with the inlet of the precooler 4, the outlet of the precooler 4 is communicated with the inlet of the compressor 6 through the low-temperature deoxygenation system 5, the outlet of the compressor 6 is communicated with the inlet of the boiler 1 through the high-temperature deoxygenation system 7, the compressor 6 is connected with the generator 8, and the compressor 6, the turbine 2 and the generator 8 are coaxially arranged.
The utility model discloses still include regenerator 3, wherein, the export of turbine 2 is linked together through the hot side of regenerator 3 and the entry of precooler 4, and the export of high temperature deoxidization system 7 is linked together through the cold side of regenerator 3 and the entry of boiler 1.
Referring to fig. 2 and 3, the low-temperature deoxidizing system 5 is formed by connecting a plurality of low-temperature deaerators 51 in parallel, the high-temperature deoxidizing system 7 is formed by connecting a plurality of high-temperature deaerators 71 in parallel, the deoxidant in the low-temperature deaerator 51 is sponge iron, and the deoxidant in the high-temperature deaerator 71 is a nickel-based chemical absorption deoxidant, a manganese-based chemical absorption deoxidant or an iron-based chemical absorption deoxidant.
The utility model discloses a concrete working process does:
high-temperature high-pressure carbon dioxide output by the boiler 1 enters the turbine 2 to do work, the turbine 2 drives the compressor 6 and the generator 8 to work, exhaust gas discharged by the turbine 2 is cooled to 32-40 ℃ through the precooler 4 and then enters the low-temperature deoxygenation system 5 to be deoxygenated, then enters the compressor 6 to be compressed, and a carbon dioxide working medium of 80-100 ℃ output by the compressor 6 enters the boiler 1 to be heated after being deoxygenated through the high-temperature deoxygenation system 7 so as to form high-temperature high-pressure carbon dioxide.
After being cooled by the precooler 4, the carbon dioxide enters the low-temperature deoxygenation system 5 and contacts with the deoxidant in the low-temperature deoxygenation system 5, and oxygen in the carbon dioxide reacts with the deoxidant to reduce the oxygen content; the compressed carbon dioxide is contacted with the oxygen scavenger in the high-temperature oxygen removal system 7, and oxygen in the carbon dioxide reacts with the oxygen scavenger, so that the oxygen content is further reduced.
The number of the low-temperature deaerators 51 is two, wherein when the deaerating effect of one low-temperature deaerator 51 is poor, the low-temperature deaerator 51 is closed, the deaerator in the low-temperature deaerator 51 is replaced, and meanwhile, the other low-temperature deaerator 51 is opened; similarly, the number of the high-temperature deaerators 71 is two, wherein when one high-temperature deaerator 71 has a poor deaerating effect, the high-temperature deaerator 71 is closed, the deaerator in the high-temperature deaerator 71 is replaced, and the other high-temperature deaerator 71 is opened.
It should be noted that the above embodiments are only for illustrating the technical idea and features of the present invention, and the specific implementation methods, such as the oxygen scavenger in the low temperature oxygen remover 51 and the high temperature oxygen remover 71, can still be modified and improved, but will not depart from the scope and the basic spirit of the present invention as defined in the claims.
Claims (6)
1. A combined oxygen removal system for a supercritical carbon dioxide power generation system is characterized by comprising a generator (8), a boiler (1), a turbine (2), a precooler (4), a low-temperature oxygen removal system (5), a compressor (6) and a high-temperature oxygen removal system (7); the outlet of the boiler (1) is communicated with the inlet of the turbine (2), the outlet of the turbine (2) is communicated with the inlet of the precooler (4), the outlet of the precooler (4) is communicated with the inlet of the compressor (6) through the low-temperature oxygen removal system (5), the outlet of the compressor (6) is communicated with the inlet of the boiler (1) through the high-temperature oxygen removal system (7), and the compressor (6) is connected with the generator (8).
2. The combined oxygen removal system for a supercritical carbon dioxide power generation system according to claim 1 further comprising a regenerator (3) wherein the outlet of the turbine (2) is in communication with the inlet of the precooler (4) via the hot side of the regenerator (3) and the outlet of the high temperature oxygen removal system (7) is in communication with the inlet of the boiler (1) via the cold side of the regenerator (3).
3. The combined oxygen removal system for a supercritical carbon dioxide power generation system according to claim 1 is characterized by the compressor (6), turbine (2) and generator (8) being arranged coaxially.
4. The combined oxygen removal system for a supercritical carbon dioxide power generation system according to claim 1 is characterized in that the low temperature oxygen removal system (5) is formed by connecting a plurality of low temperature oxygen removers (51) in parallel.
5. The combined oxygen removal system for a supercritical carbon dioxide power generation system according to claim 4 is characterized in that the high temperature oxygen removal system (7) is formed by connecting a plurality of high temperature oxygen removers (71) in parallel.
6. The combined oxygen removal system for the supercritical carbon dioxide power generation system according to claim 5, wherein the oxygen scavenger in the low temperature oxygen remover (51) is sponge iron, and the oxygen scavenger in the high temperature oxygen remover (71) is a nickel-based chemical absorption oxygen scavenger, a manganese-based chemical absorption oxygen scavenger or an iron-based chemical absorption oxygen scavenger.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020988236.1U CN212406841U (en) | 2020-06-02 | 2020-06-02 | Combined deoxidization system for supercritical carbon dioxide power generation system |
| JP2020004983U JP3230517U (en) | 2020-06-02 | 2020-11-19 | Combined deoxidation system for supercritical carbon dioxide power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020988236.1U CN212406841U (en) | 2020-06-02 | 2020-06-02 | Combined deoxidization system for supercritical carbon dioxide power generation system |
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| CN212406841U true CN212406841U (en) | 2021-01-26 |
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| CN202020988236.1U Active CN212406841U (en) | 2020-06-02 | 2020-06-02 | Combined deoxidization system for supercritical carbon dioxide power generation system |
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| JP (1) | JP3230517U (en) |
| CN (1) | CN212406841U (en) |
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- 2020-06-02 CN CN202020988236.1U patent/CN212406841U/en active Active
- 2020-11-19 JP JP2020004983U patent/JP3230517U/en active Active
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| JP3230517U (en) | 2021-02-04 |
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