CN219283302U - Periodic sewage heat recovery device for drum boiler - Google Patents
Periodic sewage heat recovery device for drum boiler Download PDFInfo
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- CN219283302U CN219283302U CN202223299448.7U CN202223299448U CN219283302U CN 219283302 U CN219283302 U CN 219283302U CN 202223299448 U CN202223299448 U CN 202223299448U CN 219283302 U CN219283302 U CN 219283302U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a heat recovery device for periodically discharging sewage of a drum boiler, which comprises the following components: a fixed-row expansion vessel; the cooling assembly comprises a cooling pool communicated with the fixed-row expanders through a pipeline. The utility model relates to a heat recovery device for periodically discharging sewage of a drum boiler, which is characterized in that the heat recovery device is formed by expanding and separating the heat wastewater into hot wastewater and secondary steam through a fixed-row expander, the hot wastewater is discharged into a cooling tank, a water suction pump pumps the hot wastewater in the cooling tank into a plate heat exchanger to heat desalted water, then the low-temperature hot wastewater after heat exchange is sprayed into an exhaust port of the fixed-row expander through a spray pipe group to cool the secondary steam into hot water, and the hot water returns to the cooling tank through an overflow pipe of the fixed-row expander, so that the problem that a large amount of secondary steam is separated from the fixed-row expander and discharged into the atmosphere to cause a large amount of heat value loss is solved, the maximum recovery of the heat value of the periodically discharged sewage is realized, and the heat recovery benefit of the boiler is improved.
Description
Technical Field
The utility model relates to the technical field of periodic steam drum boilers, in particular to a device for recovering heat of periodic exhaust water of a steam drum boiler.
Background
The boiler is an energy conversion device, the energy input to the boiler is chemical energy and electric energy in fuel, the boiler outputs steam, high temperature water or organic heat carrier with certain heat energy, and the steam drum boiler is one kind of boiler.
For the ultrahigh pressure drum boiler, in order to ensure the quality of steam and water in normal operation, periodic sewage discharge is required, the fixed-row expansion vessel is operated on the principle that the periodic sewage of the boiler is subjected to depressurization flash evaporation to separate secondary steam and waste hot water, and the waste hot water is used as a heat source in the prior art, so that part of heat lost in the sewage discharge of the boiler can be recovered, and the heat economy of a power plant is improved, and therefore, a heat recovery device is required for recovering heat in the sewage.
Although the heat recovery device for the periodic sewage can recover the waste heat of the waste hot water in the prior art, the constant-discharge expansion vessel separates out a large amount of secondary steam to be discharged into the atmosphere, so that a large amount of heat value is lost. There is therefore a need to propose a new solution to this problem.
For this reason, we propose a drum boiler periodic blowdown water heat recovery device.
Disclosure of Invention
The utility model mainly aims to provide a heat recovery device for periodically discharging sewage of a drum boiler, which can effectively solve the problems in the background technology.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
a drum boiler periodic blowdown water heat recovery device comprising:
a fixed-row expansion vessel;
the cooling assembly comprises a cooling pool which is communicated with the fixed-row expanders through a pipeline;
the heat exchange assembly comprises a plate heat exchanger and a water suction pump communicated with the plate heat exchanger through a pipeline, and the water suction pump is communicated with the cooling tank through a pipeline;
the fixed-row expander is connected with the fixed-row header of the boiler through a pipeline and is used for collecting high-temperature and high-pressure sewage of the fixed-row header of the boiler;
the fixed-row expansion vessel is provided with a fixed-row overflow pipe communicated with the cooling pool, the upper end of the fixed-row expansion vessel is provided with an exhaust port, and the interior of the exhaust port is provided with a spray pipe group;
and the plate heat exchanger is provided with a spray pipe communicated with the spray pipe group, and the spray pipe is provided with a spray control valve.
Preferably, the fixed-row expander comprises a cylinder, a partition plate provided with a gas-liquid separator is arranged in the middle position inside the cylinder, and the partition plate divides the cylinder into an upper steam cavity and a lower sewage cavity.
Preferably, the exhaust port is arranged at the upper end of the steam cavity on the fixed-row diffusion container, and the spray pipe group is arranged in the exhaust port at a position close to the lower part.
Preferably, the spray pipe group is made of 316L stainless steel, the pore size was 0.8mm.
Preferably, the fixed-row overflow pipe is arranged at the upper part of the sewage cavity under the fixed-row dilatation device, the lower part of the sewage cavity under the fixed-row dilatation device is communicated with the cooling pond through a pipeline, and a fixed-row water discharge valve is arranged on the pipeline.
Preferably, the high-temperature water inlet of the plate heat exchanger is provided with a water pumping outlet valve corresponding to the water pumping pump, and the spray control valve is arranged at the high-temperature water outlet of the plate heat exchanger.
Preferably, the plate heat exchanger cooling water inlet is provided with a demineralized water inlet valve, and the plate heat exchanger cooling water outlet is provided with a demineralized water outlet valve.
Preferably, a circulating water tank is arranged on the upper right side of the plate heat exchanger, two groups of water guide pipes are arranged on the spray pipe, and one group of water guide pipes is provided with a return circulating water tank control valve and is communicated with the circulating water tank.
Preferably, the other group of water guide pipes is provided with a cooling pool return control valve and is communicated with the cooling pool.
Compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, the periodic sewage of the drum boiler is subjected to capacity expansion separation into hot waste water and secondary steam through the fixed-row expander, the waste heat water is discharged into the cooling tank, the waste heat water in the cooling tank is pumped into the plate heat exchanger by the water suction pump to heat desalted water, the low-temperature waste heat water after heat exchange is sprayed into the exhaust port of the fixed-row expander through the spray pipe group, the secondary steam is cooled into hot water, and the hot water returns to the cooling tank through the overflow pipe of the fixed-row expander, so that the problem that a large amount of heat value loss is caused by separating the secondary steam by the fixed-row expander into the atmosphere is solved, the maximum recovery of the heat value of the periodic sewage is realized, and the heat recovery benefit of the boiler is improved.
Drawings
FIG. 1 is a block diagram of a heat recovery device for periodic exhaust water of a drum boiler according to the present utility model;
in the figure: 1. a fixed-row expansion vessel; 2. a cooling pool; 3. a plate heat exchanger; 4. a water pump; 5. a spray pipe group; 6. a demineralized water inlet valve; 7. a desalted water outlet valve; 8. a water pumping outlet valve; 9. a spray control valve; 10. returning to the cooling pool control valve; 11. a return circulation pool control valve; 12. arranging overflow pipes; 13. a cylinder; 14. a partition plate; 15. an exhaust port; 16. and a fixed discharge valve.
Detailed Description
The utility model is further described in connection with the following detailed description, in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the utility model easy to understand.
Referring to fig. 1, a heat recovery apparatus for periodically discharging water from a drum boiler includes: a fixed row of expansion vessels 1; the cooling component comprises a cooling pond 2 which is communicated with the fixed-row expansion vessel 1 through a pipeline; the heat exchange assembly comprises a plate heat exchanger 3 and a water suction pump 4 communicated with the plate heat exchanger 3 through a pipeline, the water suction pump 4 is communicated with the cooling tank 2 through a pipeline, and waste hot water in the cooling tank 2 flows to the plate heat exchanger 3 to heat desalted water through pressurization of the water suction pump 4 to become low-temperature hot wastewater; the fixed-row expansion vessel 1 is connected with a fixed-row header of the boiler through a pipeline and is used for collecting high-temperature and high-pressure sewage of the fixed-row header of the boiler, reducing pressure and flash evaporation to form waste hot water and secondary steam; the fixed-row expansion vessel 1 is provided with a fixed-row overflow pipe 12 communicated with the cooling pool 2, waste hot water is discharged into the cooling pool 2 through the fixed-row overflow pipe 12, the upper end of the fixed-row expansion vessel 1 is provided with an exhaust port 15 for realizing the recovery of the heat of the fixed-row waste hot water, and the inside of the exhaust port 15 is provided with a spray pipe group 5; the plate heat exchanger 3 is provided with a spray pipe communicated with the spray pipe group 5, the spray pipe is provided with a spray control valve 9, low-temperature thermal wastewater flows into the spray pipe group 5 at the lower part of the exhaust port 15 through the spray control valve 9, secondary steam is cooled into hot water, and then the hot water returns to the cooling pool 2 through the fixed-exhaust overflow pipe 12, and the exhaust port 15 basically does not emit hot steam outwards.
The fixed-row diffuser 1 comprises a cylinder 13, a separation plate 14 provided with a gas-liquid separator is arranged in the middle position inside the cylinder 13, and the separation plate 14 divides the cylinder 13 into an upper steam cavity and a lower sewage cavity.
The exhaust port 15 is arranged at the upper end of the steam cavity on the fixed-row diffusion vessel 1, the spray pipe group 5 is arranged in the exhaust port 15 at a position close to the lower part, and the spray pipe group 5 cools the secondary steam of the steam cavity on the fixed-row diffusion vessel 1 into hot water.
The spray pipe group 5 is made of 316L stainless steel, and the aperture size is 0.8mm.
The fixed-row overflow pipe 12 is arranged at the upper part of the sewage cavity under the fixed-row expansion vessel 1, the lower part of the sewage cavity under the fixed-row expansion vessel 1 is communicated with the cooling pond 2 through a pipeline, and a fixed-row water discharge valve 16 is arranged on the pipeline.
The high-temperature water inlet of the plate heat exchanger 3 is provided with a water pumping outlet valve 8 corresponding to the water pumping pump 4, and a spraying control valve 9 is arranged at the high-temperature water outlet of the plate heat exchanger 3.
The cooling water inlet of the plate heat exchanger 3 is provided with a demineralized water inlet valve 6, and the cooling water outlet of the plate heat exchanger 3 is provided with a demineralized water outlet valve 7.
The upper right side of the plate heat exchanger 3 is provided with a circulating water tank, two groups of water guide pipes are arranged on the spray pipe, one group of water guide pipes is provided with a return circulating water tank control valve 11 and communicated with the circulating water tank, and the water guide pipes are discharged into the circulating water tank to serve as industrial water supplement.
The other group of water guide pipes is provided with a cooling pool return control valve 10 and is communicated with the cooling pool 2.
The utility model relates to a heat recovery device for periodically discharging sewage of a drum boiler, which is used for:
the regular drainage water of the drum boiler enters the fixed-row expansion vessel 1 through a pipeline, the sewage is expanded and separated into hot waste water and secondary steam through the matched use of the fixed-row expansion vessel 1 and the partition plate 14, the hot waste water is discharged into the cooling tank 2 through the fixed-row overflow pipe 12, and the waste hot water in the cooling tank 2 flows into the plate heat exchanger 3 through the pressurization of the water suction pump 4;
the desalted water inlet valve 6 controls desalted water to enter the plate heat exchanger 3, the plate heat exchanger 3 changes waste hot water into low-temperature hot wastewater through the desalted water, and the low-temperature hot wastewater flows into the spray pipe group 5 at the lower part of the exhaust port 15 through the spray control valve 9;
the secondary steam enters the exhaust port 15, the spray pipe group 5 cools the secondary steam into hot water, and then the hot water returns to the cooling pool 2 through the fixed-row overflow pipe 12, and the exhaust port 15 basically does not emit hot steam outwards.
According to the utility model, the periodic sewage of the drum boiler is subjected to expansion separation into hot waste water and secondary steam through the fixed-row expansion vessel 1, the waste heat water is discharged into the cooling tank 2, the waste heat water in the cooling tank 2 is pumped into the plate heat exchanger 3 by the water suction pump 4 to heat desalted water, the low-temperature waste heat water after heat exchange is sprayed into the exhaust port 15 through the spray pipe group 5, the secondary steam is cooled into hot water, and the hot water returns to the cooling tank 2 through the fixed-row overflow pipe 12, so that the problem that a large amount of heat value loss is caused by separating the secondary steam from the fixed-row expansion vessel 1 and discharging the secondary steam into the atmosphere is solved, the maximum recovery of the heat value of the periodic sewage is realized, and the heat recovery benefit of the boiler is improved.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (9)
1. A drum boiler periodic blowdown water heat recovery device, comprising:
a fixed row of expansion vessels (1);
the cooling assembly comprises a cooling pool (2) communicated with the fixed-row expansion vessel (1) through a pipeline;
the heat exchange assembly comprises a plate heat exchanger (3) and a water suction pump (4) communicated with the plate heat exchanger (3) through a pipeline, and the water suction pump (4) is communicated with the cooling tank (2) through a pipeline;
the fixed-row expander (1) is connected with the fixed-row header of the boiler through a pipeline and is used for collecting high-temperature and high-pressure sewage of the fixed-row header of the boiler;
a fixed-row overflow pipe (12) communicated with the cooling pool (2) is arranged on the fixed-row expansion vessel (1), an exhaust port (15) is arranged at the upper end of the fixed-row expansion vessel (1), and a spray pipe group (5) is arranged in the exhaust port (15);
the plate heat exchanger (3) is provided with a spray pipe communicated with the spray pipe group (5), and the spray pipe is provided with a spray control valve (9).
2. A drum boiler periodic blowdown water heat recovery device according to claim 1, wherein: the fixed-row expansion vessel (1) comprises a cylinder body (13), a separation plate (14) provided with a gas-liquid separator is arranged at the middle position inside the cylinder body (13), and the separation plate (14) divides the cylinder body (13) into an upper steam cavity and a lower sewage cavity.
3. A drum boiler periodic blowdown water heat recovery device according to claim 2, wherein: the exhaust port (15) is arranged at the upper end of the steam cavity on the fixed-row expansion vessel (1), and the spray pipe group (5) is arranged in the exhaust port (15) at a position close to the lower part.
4. A drum boiler periodic blowdown water heat recovery device according to claim 1, wherein: the spray pipe group (5) is made of 316L stainless steel, and the aperture size is 0.8mm.
5. A drum boiler periodic blowdown water heat recovery device according to claim 2, wherein: the fixed-row overflow pipe (12) is arranged at the upper part of the sewage cavity under the fixed-row expansion vessel (1), the lower part of the sewage cavity under the fixed-row expansion vessel (1) is communicated with the cooling pool (2) through a pipeline, and a fixed-row water discharge valve (16) is arranged on the pipeline.
6. A drum boiler periodic blowdown water heat recovery device according to claim 1, wherein: the high-temperature water inlet of the plate heat exchanger (3) is provided with a water pumping outlet valve (8) corresponding to the water pumping pump (4), and the spray control valve (9) is arranged at the high-temperature water outlet of the plate heat exchanger (3).
7. A drum boiler periodic blowdown water heat recovery device according to claim 1, wherein: the cooling water inlet of the plate heat exchanger (3) is provided with a demineralized water inlet valve (6), and the cooling water outlet of the plate heat exchanger (3) is provided with a demineralized water outlet valve (7).
8. A drum boiler periodic blowdown water heat recovery device according to claim 7, wherein: the upper right side of the plate heat exchanger (3) is provided with a circulating water tank, two groups of water guide pipes are arranged on the spray pipe, and one group of water guide pipes is provided with a return circulating water tank control valve (11) and communicated with the circulating water tank.
9. A drum boiler periodic blowdown water heat recovery device according to claim 8, wherein: the other group of water guide pipes is provided with a cooling pool return control valve (10) and is communicated with the cooling pool (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223299448.7U CN219283302U (en) | 2022-12-05 | 2022-12-05 | Periodic sewage heat recovery device for drum boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223299448.7U CN219283302U (en) | 2022-12-05 | 2022-12-05 | Periodic sewage heat recovery device for drum boiler |
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| Publication Number | Publication Date |
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| CN219283302U true CN219283302U (en) | 2023-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223299448.7U Active CN219283302U (en) | 2022-12-05 | 2022-12-05 | Periodic sewage heat recovery device for drum boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116877977A (en) * | 2023-07-19 | 2023-10-13 | 四川电力设计咨询有限责任公司 | Boiler blow-down wastewater waste heat recovery system and recovery method |
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2022
- 2022-12-05 CN CN202223299448.7U patent/CN219283302U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116877977A (en) * | 2023-07-19 | 2023-10-13 | 四川电力设计咨询有限责任公司 | Boiler blow-down wastewater waste heat recovery system and recovery method |
| CN116877977B (en) * | 2023-07-19 | 2024-07-26 | 四川电力设计咨询有限责任公司 | Boiler blow-down wastewater waste heat recovery system and recovery method |
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