CN214094409U - Fused salt heat storage type integrated starting boiler system of thermal power plant - Google Patents
Fused salt heat storage type integrated starting boiler system of thermal power plant Download PDFInfo
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- CN214094409U CN214094409U CN202022321387.4U CN202022321387U CN214094409U CN 214094409 U CN214094409 U CN 214094409U CN 202022321387 U CN202022321387 U CN 202022321387U CN 214094409 U CN214094409 U CN 214094409U
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Abstract
The utility model discloses a fused salt heat storage type integrated starting boiler system of a thermal power plant, which comprises a fused salt tank, a preheater, a superheater, an evaporator, a flue gas heat exchanger, a hearth and a furnace smoke fan; be provided with preheater, over heater, evaporimeter and gas heater in the molten salt jar, the mouth of getting the cigarette of furnace is linked together through the entry of stove smoke blower and gas heater, gas heater's export is linked together with electrostatic precipitator's entry, the bottom of molten salt jar is provided with starting heater, the export of demineralized water pipeline is linked together through the entry of preheater, over heater and evaporimeter and auxiliary steam header, the molten salt pot intussuseption is filled with the fused salt, this system can be safe, quick start-up of realization boiler, the cost is lower simultaneously.
Description
Technical Field
The utility model belongs to the technical field of coal-fired power generation, a fused salt heat storage formula integration start-up boiler system of thermal power plant is related to.
Background
Before the boiler is ignited, the coal-fired power plant cannot generate steam by itself, and part of equipment needs to be supplied with steam heating pipes in advance to support normal ignition. These devices are mainly: the device comprises a coal mill air heater, oil gun purging steam, a steam soot blower of an air preheater, fire steam of the coal mill, a steam-driven draught fan, a steam-driven water supply pump and the like. Taking a steam-driven induced draft fan as an example, before the boiler is ignited, the air feeder and the induced draft fan must be operated in advance, and at the moment, the large boiler of the unit is not ignited, so that steam required by the small steam turbine of the induced draft fan cannot be provided. Therefore, a small boiler needs to be additionally designed, steam is continuously provided before ignition and after fire extinguishing of the large boiler, and safety shutdown of some equipment is guaranteed.
Such start-up boilers are typically small drum boilers fueled by diesel or coal.
The start-up boiler of the above type, during practical use, mainly has the following problems in 3 respects:
1. the start-up speed is slow. Before starting the boiler and igniting, an oil supply pump needs to be started, a fuel pipeline is conducted, a fan is started again, the boiler is ignited, the preparation work consumes 2-3 hours, if the boiler is started by a coal-fired type, the ignition time is longer, and even the whole starting progress of the unit is influenced.
2. The risk is high. The hearth of the starting boiler has small volume, and if the fuel oil sprayed by the oil gun is not well atomized, the explosion accidents and deflagration are easy to happen.
3. The cost is high. The selling price of 1 ton 0 diesel oil is about 5600 yuan, the fuel oil type start boiler consumes about 2 ton 0 diesel oil in 1 hour, and 1 ten thousand yuan is burnt in 1 hour. Before the set boiler is ignited or after the set boiler is put out a fire, the boiler is usually started to operate for 5-10 hours, the cost of pure fuel reaches 10-20 ten thousands, and the total cost is higher if the power consumption of equipment such as an oil pump, a fan and the like is added.
In view of the above, it is desirable to provide a safe and fast start-up boiler with low cost. This boiler utilizes the high temperature flue gas heating fused salt of boiler self-production, stores heat energy, and standby group shuts down the back or when starting next time, recycles this part heat energy and produces high temperature steam, and then realizes starting the function of boiler.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a fused salt heat storage formula integration start-up boiler system of thermal power plant, this system can be safe, quick start-up of realization boiler, and the cost is lower simultaneously.
In order to achieve the purpose, the fused salt heat storage type integrated starting boiler system of the thermal power plant comprises a fused salt tank, a preheater, a superheater, an evaporator, a flue gas heat exchanger, a hearth and a furnace flue gas fan;
be provided with preheater, over heater, evaporimeter and gas heater in the molten salt jar, the mouth of getting the cigarette of furnace is linked together through the entry of stove smoke blower and gas heater, and gas heater's export is linked together with electrostatic precipitator's entry, and the bottom of molten salt jar is provided with starting heater, and the export of demineralized water pipeline is linked together through the entry of preheater, over heater and evaporimeter and auxiliary steam header, and the molten salt jar intussuseption is filled with the fused salt.
A feed pump is arranged on the demineralized water pipeline.
The preheater, the superheater, the evaporator and the flue gas heat exchanger are sequentially distributed from top to bottom.
The wall surface of the molten salt tank is provided with a heat insulation layer.
The smoke taking port is communicated with an inlet of a furnace smoke blower through a high-temperature smoke pipeline.
And the outer wall of the high-temperature flue gas pipeline is provided with a heat-insulating layer.
The utility model discloses following beneficial effect has:
fused salt heat-retaining formula integration start-up boiler system of thermal power plant when concrete operation, heat the fused salt in the fused salt jar through the start-up heater, the rethread fused salt heats the demineralized water through pre-heater, over heater and evaporimeter and forms superheated steam, realizes the start-up of boiler through superheated steam, after normal operating, draws forth the flue gas all the way through the boiler flue and heats the fused salt through gas heater, the cost is lower.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a hearth, 2 is a smoke taking port, 3 is a smoke blower, 4 is a smoke heat exchanger, 5 is an evaporator, 6 is a superheater, 7 is a preheater, 8 is a molten salt tank, 9 is a water feeding pump and 10 is a starting heater.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the fused salt heat storage type integrated start-up boiler system of the thermal power plant of the present invention includes a fused salt tank 8, a preheater 7, a superheater 6, an evaporator 5, a flue gas heat exchanger 4, a furnace 1 and a flue gas blower 3; be provided with pre-heater 7, over heater 6, evaporimeter 5 and gas heater 4 in the molten salt jar 8, the mouth 2 of getting the cigarette of furnace 1 is linked together through the entry of stove smoke fan 3 with gas heater 4, and the export of gas heater 4 is linked together with the entry of electrostatic precipitator, and the bottom of molten salt jar 8 is provided with start heater 10, and the export of demineralized water pipeline is linked together through the entry of pre-heater 7, over heater 6 and evaporimeter 5 and auxiliary steam header, and 8 intussuseptions of molten salt jar are filled with the fused salt.
A water feeding pump 9 is arranged on the demineralized water pipeline; the preheater 7, the superheater 6, the evaporator 5 and the flue gas heat exchanger 4 are sequentially distributed from top to bottom; a heat insulation layer is arranged on the wall surface of the molten salt tank 8; the smoke taking port 2 is communicated with an inlet of a furnace smoke fan 3 through a high-temperature smoke pipeline; and the outer wall of the high-temperature flue gas pipeline is provided with a heat-insulating layer.
The utility model discloses a concrete working process does:
utilize stove smoke fan 3, extract high temperature flue gas (> 600 ℃) from the flue of furnace 1, carry to the gas heater 4 of fused salt jar 8 bottom in, wherein, the heat of high temperature flue gas is given the fused salt in the fused salt jar 8 through gas heater 4 transmission for the fused salt in the fused salt jar 8 melts and heaies up after heating, when this system starts for the first time, the unit boiler is not yet igniteed, can't produce high temperature flue gas, then heats the fused salt in the fused salt jar 8 through starting heater 10.
Meanwhile, after the demineralized water is pressurized by a water feeding pump 9, the demineralized water firstly enters a preheater 7 to be preheated, the temperature of the fed water is raised, then the demineralized water enters an evaporator 5, the water starts to evaporate to form saturated steam, the saturated steam continuously enters a superheater 6, the superheated steam is changed after heat absorption and then is sent to an auxiliary steam header to be used when the machine is stopped or started, and the preheater 7, the evaporator 5 and the superheater 6 are communicated through high-temperature-resistant metal pipelines.
The quality of the molten salt stored in the molten salt tank 8 directly reflects the heat storage capacity of the molten salt tank, and the existing unit adopts 2 arrangements, so that the heat energy stored in the molten salt tank 8 is required, and the high-temperature steam quantity required by starting/stopping the unit for 2 times can be generated.
It should be noted that the utility model discloses utilize the heat of fused salt storage boiler self-production high temperature flue gas to utilize above-mentioned heat to produce qualified steam after shutting down or before starting, produce other fuels such as vapour process do not consume fire coal, fuel, have apparent low-cost advantage, the process of producing steam simultaneously does not experience the fuel burning, has eliminated deflagration explosion hidden danger, has very high security. In addition, enough heat is stored in the high-temperature molten salt, and the working state of steam production can be achieved by introducing demineralized water, so that the starting is rapid, the energy conversion efficiency is high, and the energy loss is small.
Finally, it is required to explain that the utility model discloses compare in the heat storage formula electric boiler of configuration fused salt delivery pump simultaneously, the utility model discloses an integrated design need not be equipped with pipeline and fused salt delivery pump, greatly reduced equipment cost to equipment reliability has been improved.
Claims (6)
1. A fused salt heat storage type integrated starting boiler system of a thermal power plant is characterized by comprising a fused salt tank (8), a preheater (7), a superheater (6), an evaporator (5), a flue gas heat exchanger (4), a hearth (1) and a flue gas fan (3);
be provided with in molten salt jar (8) pre-heater (7), over heater (6), evaporimeter (5) and gas heater (4), the mouth of getting cigarette (2) of furnace (1) is linked together through the entry of stove smoke fan (3) with gas heater (4), the export of gas heater (4) is linked together with the entry of electrostatic precipitator, the bottom of molten salt jar (8) is provided with start-up heater (10), the export of demineralized water pipeline is linked together through pre-heater (7), over heater (6) and evaporimeter (5) and the entry of assisting vapour header, the intussuseption of molten salt jar (8) is filled with the fused salt.
2. The fused salt heat storage type integrated start-up boiler system of the thermal power plant according to claim 1, characterized in that a feed water pump (9) is arranged on the demineralized water pipeline.
3. The fused salt heat storage type integrated start-up boiler system of the thermal power plant as claimed in claim 1, wherein the preheater (7), the superheater (6), the evaporator (5) and the flue gas heat exchanger (4) are distributed from top to bottom in sequence.
4. The fused salt heat storage type integrated start-up boiler system of the thermal power plant as claimed in claim 1, wherein a heat insulation layer is arranged on the wall surface of the fused salt tank (8).
5. The fused salt heat storage type integrated start-up boiler system of the thermal power plant as claimed in claim 1, wherein the smoke taking port (2) is communicated with the inlet of the furnace smoke fan (3) through a high-temperature smoke pipeline.
6. The fused salt heat storage type integrated starting boiler system of the thermal power plant as claimed in claim 5, wherein an insulating layer is arranged on the outer wall of the high-temperature flue gas pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022321387.4U CN214094409U (en) | 2020-10-16 | 2020-10-16 | Fused salt heat storage type integrated starting boiler system of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022321387.4U CN214094409U (en) | 2020-10-16 | 2020-10-16 | Fused salt heat storage type integrated starting boiler system of thermal power plant |
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| CN214094409U true CN214094409U (en) | 2021-08-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112113196A (en) * | 2020-10-16 | 2020-12-22 | 西安热工研究院有限公司 | Fused salt heat storage type integrated starting boiler system of thermal power plant |
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2020
- 2020-10-16 CN CN202022321387.4U patent/CN214094409U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112113196A (en) * | 2020-10-16 | 2020-12-22 | 西安热工研究院有限公司 | Fused salt heat storage type integrated starting boiler system of thermal power plant |
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