CN217109493U - Calcium carbide waste heat coupling gas boiler power generation system - Google Patents
Calcium carbide waste heat coupling gas boiler power generation system Download PDFInfo
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- CN217109493U CN217109493U CN202220862390.3U CN202220862390U CN217109493U CN 217109493 U CN217109493 U CN 217109493U CN 202220862390 U CN202220862390 U CN 202220862390U CN 217109493 U CN217109493 U CN 217109493U
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Abstract
The utility model discloses a calcium carbide waste heat coupling gas boiler power generation system, wherein a calcium carbide furnace waste gas outlet is connected with a calcium carbide tail gas treatment system inlet, and a calcium carbide tail gas treatment system air outlet is connected with a gas boiler; a liquid outlet of the calcium carbide furnace is connected to an inlet of a high-temperature calcium carbide liquid heat exchanger, a high-temperature inert gas circulating system is connected with the high-temperature calcium carbide liquid heat exchanger and a steam reheater, the steam reheater is connected with a steam turbine, and the steam turbine is connected with a gas-fired boiler; the liquid outlet of the calcium carbide liquid high-temperature heat exchanger is connected with a molten calcium carbide liquid inlet of a calcium carbide crusher, the air outlet of a boiler blower is respectively connected with an air preheater and a cooling air inlet of the calcium carbide crusher, and the air outlet of the calcium carbide crusher is communicated with the air outlet of the air preheater; the outlet of the calcium carbide crusher is connected with the calcium carbide slag inlet of the calcium carbide slag low-temperature heat exchanger, and the low-temperature inert gas circulating system is connected with the calcium carbide slag low-temperature heat exchanger and the air preheater. The utility model discloses can realize carbide stove-gas boiler coupling power generation system waste heat comprehensive utilization.
Description
Technical Field
The utility model belongs to the technical field of the boiler is energy-conserving, a waste heat utilization system is related to, concretely relates to carbide waste heat coupling gas boiler power generation system.
Background
With the continuous deepening of the concept of energy conservation and environmental protection, the waste heat utilization technology of a boiler system is gradually improved. However, in some combined production processes, the comprehensive utilization of the waste heat of the whole system has a large optimization space. In the calcium carbide production process, the tapping temperature of the molten calcium carbide is as high as 2200 ℃, in the existing production process, the molten calcium carbide is naturally cooled to 60 ℃, and a large amount of waste heat is wasted in the process.
Because the main byproduct of the calcium carbide production process is calcium carbide tail gas which contains a large amount of CO and H 2 The calcium carbide furnace is mature and is combined with the gas boiler to generate powerAnd a co-production system, wherein the waste heat utilization of the molten calcium carbide is not integrated into the system.
SUMMERY OF THE UTILITY MODEL
For solving the problem that exists among the prior art, the utility model aims to provide a carbide waste heat coupling gas boiler power generation system, this system divide into high temperature heat source and low temperature heat source with the carbide to the pertinence utilizes respectively, realizes carbide stove-gas boiler coupling power generation system waste heat comprehensive utilization.
The utility model adopts the technical scheme as follows:
a calcium carbide waste heat coupling gas boiler power generation system comprises a calcium carbide furnace, a calcium carbide liquid high-temperature heat exchanger, a calcium carbide crusher, a calcium carbide slag low-temperature heat exchanger, a low-temperature inert gas circulating system, an air preheater, a boiler blower, a high-temperature inert gas circulating system, a steam reheater, a calcium carbide tail gas treatment system, a gas boiler and a steam turbine;
the waste gas outlet of the calcium carbide furnace is connected with the inlet of the calcium carbide tail gas treatment system, and the air outlet of the calcium carbide tail gas treatment system is connected with the gas-fired boiler;
a liquid outlet of the calcium carbide furnace is connected to an inlet of a high-temperature calcium carbide liquid heat exchanger, a high-temperature inert gas circulating system is connected with the high-temperature calcium carbide liquid heat exchanger and a steam reheater, the high-temperature inert gas circulating system can exchange heat in the high-temperature calcium carbide liquid heat exchanger to the steam reheater, the steam reheater is connected with a steam turbine, and the steam turbine is connected with a gas boiler;
the liquid outlet of the calcium carbide liquid high-temperature heat exchanger is connected with a molten calcium carbide liquid inlet of a calcium carbide crusher, the air outlet of a boiler blower is divided into two paths, one path is connected with an air preheater, the other path is connected with a cooling air inlet of the calcium carbide crusher and cools and solidifies the molten calcium carbide liquid entering the calcium carbide crusher, and the air outlet of the calcium carbide crusher is communicated with the air outlet of the air preheater;
the export of carbide breaker and carbide sediment low temperature heat exchanger's carbide sediment entry linkage, low temperature inert gas circulation system and carbide sediment low temperature heat exchanger and air heater are connected, and low temperature inert gas circulation system is arranged in heat transfer to air heater with among the carbide sediment low temperature heat exchanger.
Preferably, the liquid outlet of the calcium carbide furnace is provided with a calcium carbide pot used for containing molten calcium carbide liquid, and the liquid outlet of the calcium carbide pot is connected with the inlet of the high-temperature calcium carbide liquid heat exchanger.
Preferably, the high-temperature inert gas circulation system is a closed circulation system and is provided with a high-temperature inert gas circulation fan.
Preferably, the low-temperature inert gas circulation system is a closed circulation system and is provided with a low-temperature inert gas circulation fan.
Preferably, an air inlet adjusting valve of the air preheater is arranged on the way that an air outlet of the boiler blower is connected with the air preheater.
Preferably, a cooling air flow regulating valve is arranged on the way that an air outlet of the boiler blower is connected with the calcium carbide crusher.
Preferably, the slag outlet of the carbide slag low-temperature heat exchanger is connected to a carbide slag recovery device.
Preferably, the cold inlet of the steam reheater is connected with the outlet of the high-pressure cylinder of the steam turbine, and the hot outlet of the steam reheater is connected with the low-pressure cylinder of the steam turbine.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the system makes full use of the waste heat of the molten calcium carbide, and divides the calcium carbide waste heat into a high-temperature heat source and a low-temperature heat source according to the quality of the waste heat, wherein the high-temperature heat source is the molten calcium carbide liquid in a high-temperature calcium carbide liquid heat exchanger, the heat in the calcium carbide liquid is exchanged out through a high-temperature inert gas circulating system and is used for heating steam in a steam reheater, and the purpose of reheating the steam by using a high-temperature section is realized; the low-temperature heat source is the carbide slag in the carbide slag low-temperature heat exchanger, the heat in the carbide slag is exchanged through the low-temperature inert gas circulating system and is used for heating the air in the air preheater, and the purpose of preheating the air by using a low-temperature section is achieved; after being heated by molten calcium carbide liquid, cooling air conveyed by a boiler air feeder in the calcium carbide crusher is merged with hot air at the outlet of an air preheater and is conveyed into a gas boiler to participate in combustion.
Further, air and water all can take place chemical reaction with the carbide, reduce the carbide quality and produce the potential safety hazard, consequently the utility model designs an inert gas closed circulation (high temperature inert gas circulation system is closed circulation, low temperature inert gas circulation system is closed circulation promptly) has promoted the security of system as heat transfer medium.
Drawings
Fig. 1 is a schematic diagram of the calcium carbide waste heat coupling gas boiler power generation system of the utility model.
The system comprises a calcium carbide furnace 1, a calcium carbide pot 2, a calcium carbide liquid high-temperature heat exchanger 3, a calcium carbide crusher 4, a calcium carbide slag low-temperature heat exchanger 5, a calcium carbide slag recovery device 6, a low-temperature inert gas circulating fan 7, a low-temperature inert gas circulating system 8, an air preheater 9, a boiler blower 10, a high-temperature inert gas circulating fan 11, a high-temperature inert gas circulating system 12, a steam reheater 13, a calcium carbide tail gas treatment system 14, a gas boiler 15, a steam turbine 16, a steam turbine high-pressure cylinder 16-1, a steam turbine low-pressure cylinder 16-2, a cooling air flow regulating valve 17 and an air preheater air inlet regulating valve 18.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Examples
Referring to fig. 1, the calcium carbide waste heat coupling power generation system of this embodiment includes a calcium carbide furnace 1, a calcium carbide pot 2, a calcium carbide liquid high-temperature heat exchanger 3, a calcium carbide crusher 4, a calcium carbide slag low-temperature heat exchanger 5, a calcium carbide slag recovery device 6, a low-temperature inert gas circulation system 8, an air preheater 9, a high-temperature inert gas circulation system 12, a steam reheater 13, a calcium carbide tail gas treatment system 14, a gas boiler 15, and a steam turbine 16. A waste gas outlet of the calcium carbide furnace 1 is connected with an inlet of a calcium carbide tail gas treatment system 14, and an air outlet of the calcium carbide tail gas treatment system 14 is connected with a gas boiler 15; a liquid outlet of the calcium carbide furnace 1 is connected to an inlet of the calcium carbide liquid high-temperature heat exchanger 3, a high-temperature inert gas circulating system 12 is connected with the calcium carbide liquid high-temperature heat exchanger 3 and a steam reheater 13, the high-temperature inert gas circulating system 12 can exchange heat in the calcium carbide liquid high-temperature heat exchanger 3 to the steam reheater 13, the steam reheater 13 is connected with a steam turbine 16, and the steam turbine 16 is connected with a gas boiler 15; the liquid outlet of the calcium carbide liquid high-temperature heat exchanger 3 is connected with a molten calcium carbide liquid inlet of a calcium carbide crusher 4, the air outlet of a boiler blower 10 is divided into two paths, one path is connected with an air preheater 9, the other path is connected with a cooling air inlet of the calcium carbide crusher 4 and cools and solidifies the molten calcium carbide liquid entering the calcium carbide crusher 4, and the air outlet of the calcium carbide crusher 4 is communicated with the air outlet of the air preheater 9; the export of carbide breaker 4 and carbide sediment low temperature heat exchanger 5's carbide sediment entry linkage, low temperature inert gas circulation system 8 and carbide sediment low temperature heat exchanger 5 and air heater 9 are connected, and low temperature inert gas circulation system 8 is arranged in heat transfer to air heater 9 with in the carbide sediment low temperature heat exchanger 5. The high-temperature inert gas circulation system 12 is a closed circulation system and is provided with a high-temperature inert gas circulation fan 11. The low-temperature inert gas circulation system 8 is a closed circulation system and is provided with a low-temperature inert gas circulation fan 7. An air preheater air inlet adjusting valve 18 is arranged on the way that the air outlet of the boiler blower 10 is connected with the air preheater 9. And a cooling air flow regulating valve 17 is arranged on the way of connecting the air outlet of the boiler blower 10 with the calcium carbide crusher 4. The slag outlet of the carbide slag low-temperature heat exchanger 5 is connected to a carbide slag recovery device 6. The cold inlet of the steam reheater 13 is connected to the outlet of the high-pressure steam turbine cylinder 16-1, and the hot outlet of the steam reheater 13 is connected to the low-pressure steam turbine cylinder 16-2.
The carbide pot 2 of below is arranged into to the molten carbide liquid in the carbide stove 1, transport to the inert gas in carbide liquid high temperature heat exchanger 3 and the high temperature inert gas circulation system 12 through carbide pot 2 and carry out the heat transfer, get into carbide breaker 4 after the carbide liquid heat transfer, the carbide liquid is cooled off and is solidified in carbide breaker 4 through the cooling air, and by the broken slagging-off, form the carbide slag, the carbide slag gets into the inert gas in carbide slag low temperature heat exchanger 5 and the low temperature inert gas circulation system 8 and carries out the heat transfer, get into carbide slag recovery unit 6 after the heat transfer.
And discharging combustible waste gas of byproducts in the calcium carbide furnace 1 from the upper part, feeding the combustible waste gas into a calcium carbide tail gas treatment system 14, and then feeding the combustible waste gas into a gas boiler 15 for combustion to generate steam for power generation.
The heat source medium of the calcium carbide liquid high-temperature heat exchanger 3 is molten calcium carbide liquid from the calcium carbide pot 2, and the cold source medium is inert gas in the high-temperature inert gas circulating system 12.
The calcium carbide crusher 4 is cooled by one path of cold air separated by the boiler blower 10, and the cooled calcium carbide liquid from the calcium carbide liquid high-temperature heat exchanger 3 is cooled, solidified and further crushed into calcium carbide slag; the flow of the cooling air can be cooperatively adjusted by a cooling air flow adjusting valve 17 and an air preheater air inlet adjusting valve 18 so as to ensure that enough cooling air is always available to solidify the calcium carbide liquid when the working condition changes; and after absorbing heat in the calcium carbide crusher 4, the cooling air is mixed with hot air at the outlet of the air preheater 9 and then is fed into the gas boiler 15 to support combustion.
The heat source medium of the carbide slag low-temperature heat exchanger 5 is carbide slag from the carbide crusher 4, and the cold source medium is inert gas in the low-temperature inert gas circulating system 8.
After absorbing heat in the calcium carbide liquid high-temperature heat exchanger 3, the inert gas in the closed cycle is heated from 600-800 ℃ to 1500-1700 ℃, and enters the steam reheater 13 for heat exchange.
The heat source medium of the steam reheater 13 is high-temperature inert gas, and the cold source medium is steam from the outlet of the high-pressure cylinder 16-1 of the steam turbine; and the steam is sent to a steam turbine low-pressure cylinder 16-2 for power generation after heat exchange and temperature rise, and the inert gas is sent to a calcium carbide liquid high-temperature heat exchanger 3 for heat absorption after heat exchange and temperature reduction.
After absorbing heat in the carbide slag low-temperature heat exchanger 5, the inert gas in the closed circulation rises from 50-100 ℃ to 300-400 ℃, and enters the air preheater 9 for heat exchange.
The heat source medium of the air preheater 9 is high-temperature inert gas, and the cold source medium is air from a boiler blower 10; the air is sent to the gas boiler 15 to support combustion after heat exchange and temperature rise, and the inert gas is sent to the carbide slag low-temperature heat exchanger 5 to absorb heat after heat exchange and temperature reduction.
The gas boiler 15 receives the calcium carbide tail gas from the calcium carbide tail gas treatment system 14 after cooling, purification and pressurization as fuel, and simultaneously receives hot air from the air preheater 9, and steam generated by combustion enters the steam turbine 16 to do work and generate power.
To sum up, the utility model discloses a to the fractional utilization of carbide waste heat, adopted the high temperature section to steam reheat, the low temperature section preheats the air, has realized carbide stove-gas boiler coupling power generation system's efficiency promotion. In addition, this system adopts inert gas closed cycle as heat transfer medium, stops the chemical reaction of carbide and air and water, has promoted the security of system.
Claims (8)
1. A calcium carbide waste heat coupling gas boiler power generation system is characterized by comprising a calcium carbide furnace (1), a calcium carbide liquid high-temperature heat exchanger (3), a calcium carbide crusher (4), a calcium carbide slag low-temperature heat exchanger (5), a low-temperature inert gas circulation system (8), an air preheater (9), a boiler blower (10), a high-temperature inert gas circulation system (12), a steam reheater (13), a calcium carbide tail gas treatment system (14), a gas boiler (15) and a steam turbine (16);
a waste gas outlet of the calcium carbide furnace (1) is connected with an inlet of a calcium carbide tail gas treatment system (14), and an air outlet of the calcium carbide tail gas treatment system (14) is connected with a gas boiler (15);
a liquid outlet of the calcium carbide furnace (1) is connected to an inlet of a calcium carbide liquid high-temperature heat exchanger (3), a high-temperature inert gas circulating system (12) is connected with the calcium carbide liquid high-temperature heat exchanger (3) and a steam reheater (13), the high-temperature inert gas circulating system (12) can exchange heat in the calcium carbide liquid high-temperature heat exchanger (3) to the steam reheater (13), the steam reheater (13) is connected with a steam turbine (16), and the steam turbine (16) is connected with a gas boiler (15);
a liquid outlet of the calcium carbide liquid high-temperature heat exchanger (3) is connected with a molten calcium carbide liquid inlet of a calcium carbide crusher (4), an air outlet of a boiler blower (10) is divided into two paths, one path is connected with an air preheater (9), the other path is connected with a cooling air inlet of the calcium carbide crusher (4) and cools and solidifies the molten calcium carbide liquid entering the calcium carbide crusher (4), and an air outlet of the calcium carbide crusher (4) is communicated with an air outlet of the air preheater (9);
the export of carbide breaker (4) and the carbide slag entry linkage of carbide slag low temperature heat exchanger (5), low temperature inert gas circulation system (8) are connected with carbide slag low temperature heat exchanger (5) and air heater (9), and low temperature inert gas circulation system (8) are arranged in heat transfer to air heater (9) with in the carbide slag low temperature heat exchanger (5).
2. The calcium carbide waste heat coupling gas boiler power generation system of claim 1, wherein a calcium carbide pot (2) used for containing molten calcium carbide liquid is arranged at a liquid outlet of the calcium carbide furnace (1), and a liquid outlet of the calcium carbide pot (2) is connected with an inlet of a high-temperature calcium carbide liquid heat exchanger (3).
3. The calcium carbide waste heat coupling gas boiler power generation system according to claim 1, wherein the high-temperature inert gas circulation system (12) is a closed circulation system and is provided with a high-temperature inert gas circulation fan (11).
4. The calcium carbide waste heat coupling gas boiler power generation system according to claim 1, wherein the low-temperature inert gas circulation system (8) is a closed circulation system and is provided with a low-temperature inert gas circulation fan (7).
5. The calcium carbide waste heat coupling gas boiler power generation system as claimed in claim 1, wherein an air preheater air inlet adjusting valve (18) is arranged on one way of the connection between the air outlet of the boiler blower (10) and the air preheater (9).
6. The calcium carbide waste heat coupling gas boiler power generation system of claim 1, wherein a cooling air flow regulating valve (17) is arranged on the way that the air outlet of the boiler blower (10) is connected with the calcium carbide crusher (4).
7. The calcium carbide waste heat coupling gas boiler power generation system as claimed in claim 1, wherein a slag outlet of the calcium carbide slag low-temperature heat exchanger (5) is connected to the calcium carbide slag recovery device (6).
8. The calcium carbide waste heat coupling gas boiler power generation system as claimed in claim 1, wherein a cold inlet of the steam reheater (13) is connected with an outlet of a high pressure cylinder (16-1) of the steam turbine, and a hot outlet of the steam reheater (13) is connected with a low pressure cylinder (16-2) of the steam turbine.
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| CN202220862390.3U CN217109493U (en) | 2022-04-14 | 2022-04-14 | Calcium carbide waste heat coupling gas boiler power generation system |
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| CN202220862390.3U CN217109493U (en) | 2022-04-14 | 2022-04-14 | Calcium carbide waste heat coupling gas boiler power generation system |
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