CN214468562U - Chemical raw water step heating system utilizing waste heat - Google Patents
Chemical raw water step heating system utilizing waste heat Download PDFInfo
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- CN214468562U CN214468562U CN202022718275.2U CN202022718275U CN214468562U CN 214468562 U CN214468562 U CN 214468562U CN 202022718275 U CN202022718275 U CN 202022718275U CN 214468562 U CN214468562 U CN 214468562U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 104
- 238000010438 heat treatment Methods 0.000 title claims abstract description 34
- 239000000126 substance Substances 0.000 title claims abstract description 27
- 239000002918 waste heat Substances 0.000 title claims abstract description 18
- 238000011084 recovery Methods 0.000 claims abstract description 8
- 238000010248 power generation Methods 0.000 abstract description 4
- 238000005507 spraying Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000009529 body temperature measurement Methods 0.000 abstract 1
- 238000000605 extraction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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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
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
The utility model discloses an utilize chemistry raw water step heating system of waste heat mainly includes first steam-water heater (10), second steam-water heater (11), first to ninth pipe-line system (1) - (9), working medium recovery unit (15), temperature measurement and pressure measuring device (13) etc.. The utility model discloses the combined heat and power generation unit heat supply steam superheat degree energy that will consume through spraying water desuperheating originally is used for heating the chemical raw water, has reduced the primary energy resource consumption that the heating chemical raw water brought, improves the operation economy of combined heat and power generation unit, will reach energy saving and consumption reduction's beneficial effect.
Description
Technical Field
The utility model belongs to the technical field of the energy utilization, concretely relates to utilize chemical raw water step heating system of waste heat.
Background
In order to meet the development requirements of energy conservation and environmental protection, the technology of combined heat and power (power generation and heat supply of a power plant) with economy, high efficiency and low pollutant emission is rapidly developed and applied in China.
The general heat user (heating, industrial or refrigeration user) does not have high requirement for the degree of superheat of steam, and saturated steam or superheated steam with tiny degree of superheat can meet the requirement. In the cogeneration system, steam is usually extracted from a boiler or a turbine and supplied to heating, industrial or refrigeration users through a steam pipeline, the superheat degree of the steam extracted from the boiler or the turbine is generally high, and particularly for a reheat turbine, the superheat degree of the steam extracted from an intermediate pressure cylinder is considerable, for example: the superheat degree of extracted steam of a steam turbine intermediate pressure cylinder of the F-stage combined cycle unit even exceeds 200 ℃. In order to make the supplied steam reach the steam parameters of a hot user, a temperature and pressure reducing device is usually arranged in a combined heat and power system, a water spraying temperature reducing mode is adopted to reduce the temperature of the high-superheat steam to the steam temperature required by the user side, the steam energy level is reduced in the water spraying temperature reducing process, and the unreasonable utilization mode causes a great amount of loss of high-grade steam energy. According to the measurement of a single set of F-stage combined cycle unit: under the conditions that the steam extraction pressure of a steam turbine intermediate pressure cylinder is 1.8MPa, the steam extraction temperature is 457 ℃, and the steam supply amount is 250t/h, the high-grade energy loss of steam caused by the fact that the temperature is reduced to saturated steam by water spraying exceeds 35 MW.
Under the working condition of heat supply, the generator set needs to be supplemented with working medium (water) in time because of the loss of working medium (water) in the generator set caused by external steam supply. Before water is supplemented to the unit, the chemical raw water is firstly subjected to chemical treatment and then is supplemented to the unit, and according to the process requirements, the chemical raw water is firstly heated to a certain temperature (generally 25 ℃) and then enters a chemical water treatment system for treatment. At present, steam is generally adopted as a heat source to heat chemical raw water in domestic thermal power plants, so that the loss of the steam originally used for power generation is caused, particularly, in winter in the north of China, the temperature of the chemical raw water needs to be heated from 4-8 ℃ to 25 ℃, the steam loss is quite large, and the running economy of a unit is greatly reduced.
At present, a system which has reasonable design, can fully utilize the superheat degree of extracted steam of a generator set for heating chemical raw water and has the energy-saving characteristic does not exist.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of prior art existence, provide an utilize generating set to take out vapour superheat degree for the economizer system of heating chemistry raw water.
The utility model discloses a following technical scheme realizes:
a chemical raw water step heating system utilizing waste heat comprises a first steam-water heater, a second steam-water heater, first to ninth pipeline systems, a working medium recovery device and a temperature and pressure measuring device; wherein,
the first steam-water heater and the second steam-water heater are both provided with a water inlet and a steam inlet;
the water inlet of the first steam-water heater is connected with the first pipeline system, and the water outlet of the first steam-water heater is connected with the third pipeline system; meanwhile, the first pipeline system is connected with the third pipeline system through the second pipeline system;
a water inlet of the second steam-water heater is connected with the third pipeline system, and a water outlet of the second steam-water heater is connected with the fourth pipeline system; the fourth pipeline system is connected with a chemical raw water user;
the steam inlet of the first steam-water heater is connected with the fifth pipeline system, and the steam outlet of the first steam-water heater is connected with the seventh pipeline system; meanwhile, the fifth pipeline system is connected with the seventh pipeline system through a sixth pipeline system; the seventh pipeline system is sequentially connected with the temperature and pressure measuring device and the heat supply user;
a steam inlet of the second steam-water heater is connected with the eighth pipeline system, and a steam outlet of the second steam-water heater is connected with the ninth pipeline system; and the ninth pipeline system is connected with the working medium recovery device.
The utility model discloses the further machine that changes lies in, contains water pump, first valve among the pipe-line system.
The utility model discloses the further machine that changes lies in, contains the second valve among the pipe-line system.
The utility model discloses further change the machine and lie in, include the third valve in pipe-line system (3).
The utility model discloses the further machine that changes lies in, contains the fourth valve among the pipe-line system.
The utility model discloses the further machine that changes lies in, contains the fifth valve among the pipe-line system.
The utility model discloses the further machine that changes lies in, contains the sixth valve among the pipe-line system.
The utility model discloses the further machine that changes lies in, contains the seventh valve among the pipe-line system.
The utility model discloses the further machine that changes lies in, contains the eighth valve among the pipe-line system.
The utility model discloses the further machine that changes lies in, contains the ninth valve among the pipe-line system.
The utility model discloses at least, following profitable technological effect has:
the utility model provides a pair of utilize chemical raw water step heating system of waste heat, recoverable boiler or the superheat degree energy of steam turbine extraction heat supply for heating chemical raw water will improve energy efficiency, has considerable energy-conserving benefit.
Drawings
FIG. 1 is a schematic diagram of the structure principle of the chemical raw water step heating system using waste heat of the present invention.
Description of reference numerals:
1-9 are first to ninth pipe systems, 10 is a first steam-water heater, 11 is a first steam-water heater, 12 is a chemical raw water user, 13 is a temperature and pressure measuring device, 14 is a heat user, 15 is a working medium recovery device, 101 is a water pump, 102 is a first valve, 201 is a second valve, 301 is a third valve, 401 is a fourth valve, 501 is a fifth valve, 601 is a sixth valve, 701 is a seventh valve, 801 is an eighth valve, and 901 is a ninth valve.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and embodiments:
as shown in fig. 1, the utility model provides a chemical raw water step heating system using waste heat, which comprises a first steam-water heater 10, a second steam-water heater 11, first to ninth pipeline systems 1 to 9, a working medium recovery device 15, a temperature measuring and pressure measuring device 13, etc.;
the first pipeline system 1 is provided with a water pump 101 and a first valve 102, and the second pipeline system 2-9 is provided with second valve 201-901, a ninth valve 201-901.
After the chemical raw water to be heated flows into the first steam-water heater 10 from the first pipeline system 1 for heat convection and temperature rise, the chemical raw water flows into the second steam-water heater 11 through the third pipeline system 3 for further heat convection and temperature rise, and then the chemical raw water is supplied to a chemical raw water user 12 through the fourth pipeline system 4. The second pipe system 2 is a water side bypass system of the first steam-water heater 10, and the chemically raw water to be heated can flow directly from the first pipe system 1 through the second pipe system 2 into the third pipe system 3.
The heat supply steam provided for the heat user firstly flows into the first steam-water heater 10 from the fifth pipeline system 5 for heat convection and temperature reduction, and then enters the seventh pipeline system 7. The sixth pipe system 6 is a steam-side bypass system of the first steam-water heater 10, and the heating steam can also flow directly from the fifth pipe system 5 through the pipe system 6 into the seventh pipe system 7. The steam in the seventh pipe system 7 finally flows to the heat consumer 14 after passing through the temperature and pressure measuring device 13.
The second steam, which is the original steam used for heating the chemical raw water in the unit, generally is auxiliary steam of the unit, extracted steam of a steam turbine or other steam sources, flows into the second steam-water heater 11 from the eighth pipeline system 8 for convection heat exchange and cooling, and then flows into the first pipeline system 9 and then flows to the working medium recovery device 15. The adjustment of the flow of the second steam can be realized by adjusting the opening degree of the eighth valve 801 and the opening degree of the ninth valve 901, so that the final heating temperature of the chemical raw water can be adjusted.
The temperature and pressure measuring device 13 is used for monitoring whether the temperature and pressure of the heating steam flowing to the heat user 14 can meet the parameter requirements of the heat user on the heating steam. When the temperature of the heating steam is found not to meet the requirement, the flow of the chemically generated water flowing through the first steam-water heater 10 can be controlled by comprehensively adjusting the opening degrees of the first valve 102 and the second valve 201, so that the purpose of regulating the steam temperature is further achieved; when the heating steam pressure is found not to meet the requirement, the adjustment of the heating steam pressure can be realized by comprehensively adjusting the opening degree of the fifth valve 501 and the seventh valve 701.
When the first steam-water heater 10 fails and needs to be shut down for maintenance, the first valve 102, the third valve 301 and the fifth valve 501 are closed to isolate the first steam-water heater 10; and simultaneously, the second valve 201 and the sixth valve 601 are opened to respectively bypass the water side and the steam side of the first steam-water heater 10. So that the basic functions of the heating of the chemically raw water and the supply of heat to the user are not affected in case the steam-water heater 10 is out of operation.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent one embodiment of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. A chemical raw water step heating system utilizing waste heat is characterized by comprising a first steam-water heater (10), a second steam-water heater (11), a first pipeline system (1) to a ninth pipeline system (9), a working medium recovery device (15) and a temperature and pressure measuring device (13); wherein,
the first steam-water heater (10) and the second steam-water heater (11) are both provided with a water inlet and a steam inlet;
the water inlet of the first steam-water heater (10) is connected with the first pipeline system (1), and the water outlet of the first steam-water heater (10) is connected with the third pipeline system (3); meanwhile, the first pipeline system (1) is connected with the third pipeline system (3) through the second pipeline system (2);
the water inlet of the second steam-water heater (11) is connected with the third pipeline system (3), and the water outlet of the second steam-water heater (11) is connected with the fourth pipeline system (4); the fourth pipeline system (4) is connected with a chemical raw water user (12);
the steam inlet of the first steam-water heater (10) is connected with the fifth pipeline system (5), and the steam outlet of the first steam-water heater (10) is connected with the seventh pipeline system (7); meanwhile, the fifth pipeline system (5) is connected with the seventh pipeline system (7) through a sixth pipeline system (6); the seventh pipeline system (7) is sequentially connected with the temperature and pressure measuring device (13) and the heat supply user (14);
the steam inlet of the second steam-water heater (11) is connected with the eighth pipeline system (8), and the steam outlet of the second steam-water heater (11) is connected with the ninth pipeline system (9); the ninth pipeline system (9) is connected with a working medium recovery device (15).
2. A chemically raw water stepped heating system using waste heat according to claim 1, characterized in that the pipeline system (1) comprises a water pump (101) and a first valve (102).
3. A chemically raw water stepped heating system using waste heat according to claim 2, characterized in that the pipe system (2) comprises a second valve (201).
4. A chemically raw water stepped heating system using waste heat according to claim 3, characterized in that the piping system (3) comprises a third valve (301).
5. A chemically raw water stepped heating system using waste heat according to claim 4, characterized in that the pipeline system (4) comprises a fourth valve (401).
6. A chemically raw water stepped heating system using waste heat according to claim 5, characterized in that the pipeline system (5) comprises a fifth valve (501).
7. A chemically raw water stepped heating system using waste heat according to claim 6, characterized in that the pipeline system (6) comprises a sixth valve (601).
8. A chemically raw water stepped heating system using waste heat according to claim 7, characterized in that the piping system (7) comprises a seventh valve (701).
9. A chemically raw water stepped heating system using waste heat according to claim 8, characterized in that the piping system (8) comprises an eighth valve (801).
10. A chemically raw water stepped heating system using waste heat according to claim 9, characterized in that the piping system (9) comprises a ninth valve (901).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022718275.2U CN214468562U (en) | 2020-11-21 | 2020-11-21 | Chemical raw water step heating system utilizing waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022718275.2U CN214468562U (en) | 2020-11-21 | 2020-11-21 | Chemical raw water step heating system utilizing waste heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214468562U true CN214468562U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022718275.2U Active CN214468562U (en) | 2020-11-21 | 2020-11-21 | Chemical raw water step heating system utilizing waste heat |
Country Status (1)
| Country | Link |
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| CN (1) | CN214468562U (en) |
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2020
- 2020-11-21 CN CN202022718275.2U patent/CN214468562U/en active Active
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