CN216346364U - System for desulfurization slurry flash evaporation is carried heat and is preheated buggy - Google Patents
System for desulfurization slurry flash evaporation is carried heat and is preheated buggy Download PDFInfo
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- CN216346364U CN216346364U CN202122984444.1U CN202122984444U CN216346364U CN 216346364 U CN216346364 U CN 216346364U CN 202122984444 U CN202122984444 U CN 202122984444U CN 216346364 U CN216346364 U CN 216346364U
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Abstract
The utility model provides a system for preheating pulverized coal by flash evaporation and heat extraction of desulfurization slurry, which comprises a steam turbine, a desulfurization tower, a flash tank, a boiler and an absorption heat pump, wherein: the steam extraction outlet of the steam turbine is connected with the high-temperature heat source inlet of the absorption heat pump; a desulfurization slurry outlet of the desulfurization tower is connected with a desulfurization slurry inlet of the flash tank, and a steam outlet of the flash tank is connected with a low-temperature heat source inlet of the absorption heat pump; a pulverized coal heat exchange pipeline is arranged in the absorption heat pump, and an inlet of the pulverized coal heat exchange pipeline is communicated with a pulverized coal outlet of the coal mill; the system of the utility model takes the extracted steam of the steam turbine as a high-temperature heat source, takes the heat extracted from the desulfurization slurry through flash evaporation as a low-temperature heat source of the absorption heat pump, and the high-temperature heat source and the low-temperature heat source jointly drive the absorption heat pump to preheat the pulverized coal, thereby achieving the effects of energy conservation and consumption reduction.
Description
Technical Field
The utility model belongs to the technical field of waste heat recovery of coal-fired power plants, and particularly belongs to a system for preheating coal powder by flash evaporation and heat extraction of desulfurization slurry.
Background
Coal powder in a coal-fired power plant is usually directly introduced into a boiler for combustion, and because the combustion temperature of the boiler is higher, the temperature of the coal powder is lower, the irreversible loss in the combustion process is larger, and if the coal powder is preheated, the irreversible loss in the combustion process of the boiler can be reduced, so that the effects of saving energy and reducing consumption are achieved.
The flue gas emission of a coal-fired power plant is one of the main sources of domestic atmospheric pollutants, a wet desulphurization tower is widely adopted by the domestic coal-fired power plant, the desulphurization slurry is used for desulphurization of the flue gas in the desulphurization tower, the desulphurization slurry absorbs heat in a large amount of flue gas, and the heat is not utilized, so that the waste of heat is caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a system for preheating pulverized coal by flash evaporation heat extraction of desulfurization slurry, which takes steam extracted by a steam turbine as a high-temperature heat source and heat extracted from the desulfurization slurry through flash evaporation as a low-temperature heat source of an absorption heat pump, and the absorption heat pump is driven by the high-temperature heat source and the low-temperature heat source together to preheat the pulverized coal, so that the effects of energy conservation and consumption reduction are achieved.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a desulfurization thick liquid flash distillation is carried heat and is preheated buggy system, includes steam turbine, desulfurizing tower, flash tank, boiler and absorption heat pump, wherein:
the steam extraction outlet of the steam turbine is connected with the high-temperature heat source inlet of the absorption heat pump;
a desulfurization slurry outlet of the desulfurization tower is connected with a desulfurization slurry inlet of the flash tank, and a steam outlet of the flash tank is connected with a low-temperature heat source inlet of the absorption heat pump;
a pulverized coal heat exchange pipeline is arranged in the absorption heat pump, and an inlet of the pulverized coal heat exchange pipeline is communicated with a pulverized coal outlet of the coal mill.
And the exhaust outlet of the steam turbine is connected with the exhaust inlet of the condenser.
Furthermore, a high-temperature heat source outlet of the absorption heat pump is connected with a steam extraction inlet of the condenser.
Further, a desulfurization slurry outlet of the flash tank is connected with a slurry spraying inlet of the desulfurization tower.
Further, a slurry spraying inlet of the desulfurization tower is arranged at the top of the desulfurization tower.
Further, a slurry pump is arranged between the desulfurization tower and the flash tank, and the slurry pump is used for introducing the desulfurization slurry into the flash tank.
Furthermore, the outlet of the pulverized coal heat exchange pipeline is connected with the pulverized coal inlet of the boiler.
Further, the steam turbine is communicated with an outlet of the superheated steam pipeline.
The utility model also provides a method for preheating the coal powder by the system for carrying out flash evaporation heat extraction on the desulfurization slurry and preheating the coal powder.
Furthermore, steam obtained by flash evaporation is condensed into water in the absorption heat pump, and the condensed water is used for supplementing water to the heat supply network.
Compared with the prior art, the utility model has at least the following beneficial effects:
the utility model provides a system for preheating pulverized coal by flash evaporation and heat extraction of desulfurization slurry, which utilizes steam flashed out of the desulfurization slurry as a low-temperature heat source, steam extracted by a steam turbine as a high-temperature heat source, and the low-temperature heat source preheats the pulverized coal after the grade is improved by an absorption heat pump, so that the irreversible loss in the combustion process of a boiler is reduced, and the effects of energy conservation and consumption reduction are achieved.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
In the drawings: the system comprises a steam turbine 1, a condenser 2, a desulfurizing tower 3, a slurry pump 4, a flash tank 5, a boiler 6 and an absorption heat pump 7.
Detailed Description
The utility model is further described with reference to the following figures and detailed description.
As shown in figure 1, the utility model provides a system for preheating pulverized coal by flash evaporation and heat extraction of desulfurization slurry, which comprises a steam turbine 1, a condenser 2, a desulfurization tower 3, a slurry pump 4, a flash evaporation tank 5, a boiler 6 and an absorption heat pump 7, wherein,
an extraction outlet of the steam turbine 1 is connected with a high-temperature heat source inlet of the absorption heat pump 7, an exhaust outlet of the steam turbine 1 is connected with a steam inlet of the condenser 2, and a high-temperature heat source outlet of the absorption heat pump 7 is connected with an extraction inlet of the condenser 2;
a desulfurization slurry outlet of the desulfurization tower 3 is connected with an inlet of a slurry pump 4, an outlet of the slurry pump 4 is connected with an inlet of a flash tank 5, a slurry outlet of the flash tank 5 is connected with a slurry spraying inlet of the desulfurization tower 3, and a steam outlet of the flash tank 5 is connected with a low-temperature heat source inlet of an absorption heat pump 7;
the absorption heat pump 7 is provided with a pulverized coal heat exchange pipeline, a pulverized coal inlet of the pulverized coal heat exchange pipeline is communicated with a pulverized coal outlet of the coal mill, and a pulverized coal outlet of the pulverized coal heat exchange pipeline is connected with the boiler.
The utility model provides a method for preheating coal powder by flash evaporation and heat extraction of desulfurization slurry.A steam extracted from a steam turbine is used as a high-temperature heat source of an absorption heat pump 7, the desulfurization slurry in a desulfurization tower 3 is sent into a flash tank 5 through a slurry pump 4, the desulfurization slurry in the flash tank 5 is subjected to an evaporation cooling process to flash evaporate steam, the steam is used as a low-temperature heat source of the absorption heat pump 7, the high-temperature heat source and the low-temperature heat source jointly drive the absorption heat pump 7 to preheat the coal powder from a coal mill, and the preheated coal powder is sent into the boiler.
Further, the steam releases heat in the absorption heat pump 7 and is condensed into water, and the condensed water can be used as heat supply network water supplement according to the water quality condition.
Further, the desulfurization slurry in the flash tank 5 is cooled after being flashed into cold slurry, and the cold slurry is sent into the desulfurization tower 3 again and sprayed into the tower from the top of the desulfurization tower.
Claims (8)
1. The utility model provides a system for desulfurization thick liquid flash distillation is carried heat and is preheated buggy which characterized in that, includes steam turbine (1), desulfurizing tower (3), flash tank (5), boiler (6) and absorption heat pump (7), wherein:
the steam extraction outlet of the steam turbine (1) is connected with the high-temperature heat source inlet of the absorption heat pump (7);
a desulfurization slurry outlet of the desulfurization tower (3) is connected with a desulfurization slurry inlet of the flash tank (5), and a steam outlet of the flash tank (5) is connected with a low-temperature heat source inlet of the absorption heat pump (7);
a pulverized coal heat exchange pipeline is arranged in the absorption heat pump (7), and an inlet of the pulverized coal heat exchange pipeline is communicated with a pulverized coal outlet of the coal mill.
2. The system for preheating pulverized coal by flash evaporation and heat extraction of desulfurization slurry as claimed in claim 1, further comprising a condenser (2), wherein an exhaust outlet of the turbine (1) is connected with an exhaust inlet of the condenser (2).
3. The system for preheating pulverized coal by flash evaporation and heat extraction of desulfurization slurry as claimed in claim 2, wherein the high-temperature heat source outlet of the absorption heat pump (7) is connected with the steam extraction inlet of the condenser (2).
4. The system for preheating pulverized coal by desulfurization slurry flash evaporation and heat extraction as claimed in claim 1, wherein the desulfurization slurry outlet of the flash tank (5) is connected with the slurry spraying inlet of the desulfurization tower (3).
5. The system for preheating pulverized coal by desulfurization slurry flash evaporation and heat extraction as claimed in claim 4, characterized in that the slurry spraying inlet of the desulfurization tower (3) is arranged at the top of the desulfurization tower (3).
6. The system for preheating pulverized coal by desulfurization slurry flash evaporation and heat extraction as claimed in claim 1, wherein a slurry pump (4) is arranged between the desulfurization tower (3) and the flash tank (5), and the slurry pump (4) is used for introducing desulfurization slurry into the flash tank (5).
7. The system for preheating pulverized coal by flash evaporation and heat raising of desulfurization slurry as claimed in claim 1, wherein the outlet of the pulverized coal heat exchange pipeline is connected with the pulverized coal inlet of a boiler.
8. The system for preheating pulverized coal by desulfurization slurry flash evaporation and heat extraction as claimed in claim 1, wherein the turbine (1) is communicated with an outlet of a superheated steam pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122984444.1U CN216346364U (en) | 2021-11-30 | 2021-11-30 | System for desulfurization slurry flash evaporation is carried heat and is preheated buggy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122984444.1U CN216346364U (en) | 2021-11-30 | 2021-11-30 | System for desulfurization slurry flash evaporation is carried heat and is preheated buggy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216346364U true CN216346364U (en) | 2022-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122984444.1U Active CN216346364U (en) | 2021-11-30 | 2021-11-30 | System for desulfurization slurry flash evaporation is carried heat and is preheated buggy |
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| CN (1) | CN216346364U (en) |
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2021
- 2021-11-30 CN CN202122984444.1U patent/CN216346364U/en active Active
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