CN211078487U - Calcium carbide furnace cooling waste heat power generation system - Google Patents
Calcium carbide furnace cooling waste heat power generation system Download PDFInfo
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- CN211078487U CN211078487U CN201921333645.1U CN201921333645U CN211078487U CN 211078487 U CN211078487 U CN 211078487U CN 201921333645 U CN201921333645 U CN 201921333645U CN 211078487 U CN211078487 U CN 211078487U
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Abstract
A calcium carbide furnace cooling waste heat power generation system is characterized in that a waste heat circulation pipeline is connected to a vaporization cooling flue, an expander is connected to a generator, and an organic circulation pipeline is connected to the expander; the waste heat circulating pipeline is sequentially connected with a steam pocket, a heat accumulator, an evaporator, a preheater and a deaerator, so that waste heat gas is converted into high-temperature water in the heat accumulator and then flows into the evaporator, the evaporator and the preheater are also connected to the organic circulating pipeline, heat exchange is carried out in the evaporator through organic working media and the high-temperature water, so that organic working medium steam flows into an expander to do work through expansion, and the organic working medium steam is converted into organic working medium liquid through an organic working medium condenser; the outlet of the deaerator is connected with a second water pump, and the second water pump is simultaneously connected with the steam drum and the heat accumulator; the bottom of the steam pocket is also connected with the vaporization cooling flue through a third water pump, so that the undersaturated water in the steam pocket can be driven by the third water pump to directly flow back to the vaporization cooling flue, and the cyclic utilization of residual heat gas in the vaporization cooling flue is realized.
Description
Technical Field
The utility model relates to a waste heat power generation system field especially relates to a carbide stove cooling waste heat power generation system.
Background
Calcium carbide is an important basic chemical raw material in China, about 70 percent of the current calcium carbide output is used in chemical industries such as PVC production, organic synthesis and the like, 8 percent of the current calcium carbide output is used in industries such as mechanical metallurgy and the like, and 2 percent of the current calcium carbide output is used in export. By 2018, the capacity of the device is 4500 million tons, and the yield is about 2500 million tons. GB21343-2015 limit for energy consumption of carbide unit product issued in 2015 regulates the electric furnace power consumption and comprehensive energy consumption to 3080 kilowatt-hour/ton and 0.823 ton of standard coal. How to improve the resource utilization rate, protect the environment and safely produce will become an important task and focus of attention of the industry.
At present, most of newly-built calcium carbide electric furnaces are fully closed furnaces, the flue gas temperature reaches about 900 ℃, and a large amount of circulating cooling water is needed for cooling the newly-built calcium carbide electric furnaces in order to protect the safety of equipment and the safe operation of a system. At present, a softened water open type cooling system is adopted, a large amount of chemical agents are needed to reduce the hardness of circulating water, and a large amount of circulating water is needed to ensure that the outlet temperature does not exceed 60 ℃ so as to prevent the surface scaling caused by overhigh temperature from influencing the operation safety of equipment. Because the open circulation cooling system with large water volume is adopted, the heat of the calcium carbide furnace is converted into the heat energy in the waste heat gas, but the prior art lacks reasonable means to utilize the heat energy in the waste heat gas, so that a large amount of waste heat resources are wasted, and a large amount of water resources and electric power resources are consumed.
SUMMERY OF THE UTILITY MODEL
The open circulating water cooling system who adopts in order to solve current carbide stove can cause a large amount of waste heat in the waste heat gas not by the problem of effective utilization, the utility model provides a carbide stove cooling waste heat power generation system.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be: a calcium carbide furnace cooling waste heat power generation system utilizes high-temperature waste heat gas obtained after heat exchange and cooling of a calcium carbide furnace in a vaporization cooling flue to drive a generator to generate power, wherein the vaporization cooling flue is connected with a waste heat circulation pipeline for waste heat gas to flow circularly, the generator is connected with an expander, and the expander is connected with an organic circulation pipeline for organic working medium to flow circularly;
the waste heat circulating pipeline is sequentially connected with a steam pocket, a heat accumulator, an evaporator, a preheater and a deaerator along the flowing direction of waste heat gas, so that the waste heat gas flows into the heat accumulator from the steam pocket, is converted into high-temperature water and then flows into the evaporator, the evaporator and the preheater are also connected to an organic circulating pipeline, the organic circulating pipeline is also connected with an organic working medium condenser and an organic working medium pump, the organic working medium and the high-temperature water exchange heat in the evaporator, so that the organic working medium steam flows into the expansion machine to do expansion work, the organic working medium steam flowing out from the expander is cooled by the organic working medium condenser, so that the organic working medium steam after expansion and working is converted into organic working medium liquid, the preheated organic working medium flows back to the evaporator through heat exchange between the organic working medium liquid and high-temperature water in the preheater so as to realize the cyclic evaporation work of the organic working medium;
the outlet of the heat accumulator is connected with a first water pump, the first water pump is simultaneously connected with the evaporator and the steam drum, so that high-temperature water can flow from the heat accumulator to the evaporator, and redundant high-temperature water can directly flow back to the steam drum; the outlet of the deaerator is connected with a second water pump, and the second water pump is simultaneously connected with the steam drum and the heat accumulator, so that high-temperature water which flows out of the preheater and is deaerated by the deaerator can respectively flow back to the steam drum and the heat accumulator; the bottom of the steam pocket is also connected with the vaporization cooling flue through a third water pump, so that the undersaturated water in the steam pocket can be driven by the third water pump to directly flow back to the vaporization cooling flue, and the cyclic utilization of residual heat gas in the vaporization cooling flue is realized.
Preferably, the organic working medium condenser is connected with a cooling pipeline, the cooling pipeline is connected with a cooling tower for providing cooling medium for the cooling pipeline, and the cooling pipeline is further connected with a fourth water pump.
Preferably, the organic working medium is pentafluoropropane.
Preferably, the deaerator is connected with a water jet air ejector, the water jet air ejector is connected with the water tank through a water return pipe, and the water return pipe is connected with a fifth water pump, so that water flow in the water tank enters the water jet air ejector and is returned to the water tank after being flushed out along with gas in the deaerator by the water jet air ejector.
Preferably, the top of the deaerator is connected with a water ring vacuum pump.
Preferably, the first water pump is connected with an inlet of the deaerator through the plate heat exchanger.
Preferably, the second water pump is connected with the vaporization cooling flue so as to realize emergency and safe water supplement from the deaerator to the vaporization cooling flue.
According to the technical scheme, the beneficial effects of the utility model are that:
the utility model discloses make in the vaporization cooling flue to the high temperature waste heat gas that obtains after calcium carbide stove heat transfer cooling turn into high temperature water through steam pocket and heat accumulator, flow into evaporimeter and pre-heater again, and exchange heat with organic working medium in evaporimeter and pre-heater, make organic working medium be heated and turn into steam and get into the expander and do work, just can drive the generator and generate electricity, high temperature rivers after the heat transfer return steam pocket and heat accumulator, and the undersaturated water in the steam pocket can be driven by the third water pump and directly flow back to the vaporization cooling flue, realize the cyclic utilization of waste heat gas in the vaporization cooling flue, just can carry out high-efficient utilization to the heat of waste heat gas in the vaporization cooling flue, and because the temperature of waste heat gas can reduce rapidly, just can cool off calcium carbide stove once more through the gained water after the heat transfer of waste heat gas, thereby can reduce the water yield that the calcium carbide stove heat transfer cold in-process needs, and simultaneously, water resources and electric power resources are saved.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a diagram illustrating a second embodiment.
The labels in the figure are: 1. the system comprises a vaporization cooling flue, 2, a steam pocket, 3, a heat accumulator, 4, a first water pump, 5, an evaporator, 6, a preheater, 7, a deaerator, 8, a second water pump, 9, a third water pump, 10, a generator, 11, an expander, 12, an organic working medium condenser, 13, an organic working medium pump, 14, a cooling tower, 15, a fourth water pump, 16, a water jet air extractor, 17, a water tank, 18, a fifth water pump, 19, a water ring vacuum pump, 20 and a plate heat exchanger.
Detailed Description
Referring to the drawings, the specific embodiments are as follows:
the first embodiment is as follows: as shown in fig. 1, a calcium carbide furnace cooling waste heat power generation system utilizes high-temperature waste heat gas obtained after the calcium carbide furnace is subjected to heat exchange and cooling in a vaporization cooling flue 1 to drive a generator 10 to generate power, and is characterized in that: the evaporation cooling flue 1 is connected with a waste heat circulation pipeline for circulating and flowing waste heat gas, the generator 10 is connected with an expander 11, the expander 11 is connected with an organic circulation pipeline for circulating and flowing organic working media, and in the embodiment, the organic working media adopt pentafluoropropane.
The waste heat circulating pipeline is sequentially connected with a steam pocket 2, a heat accumulator 3, an evaporator 5, a preheater 6 and a deaerator 7 along the flowing direction of waste heat gas, so that the waste heat gas flows into the heat accumulator 3 from the steam pocket 2 and is converted into high-temperature water and then flows into the evaporator 5, the evaporator 5 and the preheater 6 are also connected onto the organic circulating pipeline, the organic circulating pipeline is also connected with an organic working medium condenser 12 and an organic working medium pump 13, heat exchange is carried out in the evaporator 5 through organic working medium and the high-temperature water, so that the organic working medium steam flows into an expander 11 to expand and do work, the organic working medium condenser 12 is connected with a cooling pipeline, the cooling pipeline is connected with a cooling tower 14 for providing cooling medium into the cooling pipeline, the cooling pipeline is also connected with a fourth water pump 15, and the organic working medium steam flowing out of the expander 11 is cooled through the organic working medium condenser 12, the organic working medium steam after expansion work is converted into organic working medium liquid, the organic working medium liquid and high-temperature water exchange heat in the preheater 6, and the preheated organic working medium flows back to the evaporator 5, so that the circulating evaporation work of the organic working medium is realized.
The outlet of the heat accumulator 3 is connected with a first water pump 4, the first water pump 4 is simultaneously connected with the evaporator 5 and the steam drum 2, so that high-temperature water can flow from the heat accumulator 3 to the evaporator 5, and redundant high-temperature water can directly flow back to the steam drum 2; the outlet of the deaerator 7 is connected with a second water pump 8, the second water pump 8 is simultaneously connected with the steam drum 2 and the heat accumulator 3, so that high-temperature water which flows out of the preheater 6 and is deaerated by the deaerator 7 can respectively flow back to the steam drum 2 and the heat accumulator 3; the second water pump 8 is also connected with the vaporization cooling flue 1 to realize emergency and safe water supplement from the deaerator 7 to the vaporization cooling flue 1; the bottom of the steam pocket 2 is also connected with the evaporation cooling flue 1 through a third water pump 9, so that the undersaturated water in the steam pocket 2 can be driven by the third water pump 9 to directly flow back to the evaporation cooling flue 1, and the cyclic utilization of the residual heat gas in the evaporation cooling flue 1 is realized.
In this embodiment, the deaerator 7 is connected with the water jet air ejector 16, the water jet air ejector 16 is connected with the water tank 17 through a water return pipe, and the water return pipe is connected with the fifth water pump 18, so that water flow in the water tank 17 enters the water jet air ejector 16 and is returned to the water tank 17 after being flushed out along with gas in the deaerator 7 by the water jet air ejector 16.
When the heat recovery device works, the residual hot gas flows into the steam drum 2 from the vaporization cooling flue 1 and then flows into the heat accumulator 3, the residual hot gas is converted into high-temperature water in the heat accumulator 3, the high-temperature water flows into the evaporator 5 and the preheater 6 in sequence under the driving of the first water pump 4, and the residual high-temperature water directly flows back to the steam drum 2; meanwhile, the organic working medium flows into the preheater 6 and the evaporator 5 in sequence under the drive of the organic working medium pump 13, so that the organic working medium exchanges heat with high-temperature water in the preheater 6 and the evaporator 5 in sequence, and is converted into organic working medium steam in the evaporator 5, the organic working medium steam flows into the expander 11 to do work, the generator 10 can be driven to generate electricity, the organic working medium steam which does work in the expander 11 flows into the organic working medium condenser 12 and exchanges heat with a cooling medium provided by the cooling tower 14 for cooling, so that the organic working medium steam is converted into liquid and flows into the preheater 6 and the evaporator 5 again, and cyclic utilization and continuous work are realized; high-temperature water flows out of the preheater 6 and then enters the deaerator 7, the water jet air ejector 16 on the deaerator 7 can suck gas out of the high-temperature water in the deaerator 7, the high-temperature water after being deaerated under the driving of the second water pump 8 flows back to the steam drum 2 and the heat accumulator 3, recycling is achieved, and corrosion caused by excessive oxygen in the high-temperature water is avoided; meanwhile, the undersaturated water in the steam pocket 2 can be driven by the third water pump 9 to directly flow back to the vaporization cooling flue 1, so that forced continuous exchange is formed between the steam pocket 2 and the vaporization cooling flue 1, and the residual heat gas in the vaporization cooling flue 1 can be continuously recycled; the second water pump 8 is also connected with the vaporization cooling flue 1, and when the temperature of the vaporization cooling flue 1 is too high, emergency safe water replenishing is carried out on the vaporization cooling flue 1 from the deaerator 7.
Example two: as shown in fig. 2, the difference from the first embodiment is that a water ring vacuum pump 19 is connected to the top of the deaerator 7; the first water pump 4 is connected with an inlet of the deaerator 7 through the plate type heat exchanger 20, so that part of high-temperature water sent out from the heat accumulator 3 enters the plate type heat exchanger 20 to exchange heat with a heat user, and the utilization efficiency of waste heat gas is improved.
Claims (7)
1. The utility model provides a carbide stove cooling waste heat power generation system, utilizes in vaporization cooling flue (1) to the high temperature waste heat gas drive generator (10) that carbide stove heat transfer cooling back gained to generate electricity, its characterized in that: the evaporation cooling flue (1) is connected with a waste heat circulating pipeline for waste heat gas to flow circularly, the generator (10) is connected with an expander (11), and the expander (11) is connected with an organic circulating pipeline for organic working medium to flow circularly;
the waste heat circulating pipeline is sequentially connected with a steam pocket (2), a heat accumulator (3), an evaporator (5), a preheater (6) and a deaerator (7) along the flowing direction of waste heat gas, so that the waste heat gas flows into the heat accumulator (3) from the steam pocket (2) and is converted into high-temperature water, and then flows into the evaporator (5), the evaporator (5) and the preheater (6) are also connected onto the organic circulating pipeline, the organic circulating pipeline is also connected with an organic working medium condenser (12) and an organic working medium pump (13), heat exchange is carried out in the evaporator (5) through organic working medium and high-temperature water, the organic working medium steam flows into an expander (11) to do work through expansion, the organic working medium steam flowing out of the expander (11) is cooled through the organic working medium condenser (12), the organic working medium steam after doing work is converted into organic working medium liquid, and heat exchange is carried out in the preheater (6) through the organic working medium liquid and the high-temperature water, the preheated organic working medium flows back to the evaporator (5) to realize the cyclic evaporation work of the organic working medium;
the outlet of the heat accumulator (3) is connected with a first water pump (4), the first water pump (4) is simultaneously connected with the evaporator (5) and the steam drum (2), so that high-temperature water can flow from the heat accumulator (3) to the evaporator (5), and redundant high-temperature water can directly flow back to the steam drum (2); the outlet of the deaerator (7) is connected with a second water pump (8), the second water pump (8) is simultaneously connected with the steam drum (2) and the heat accumulator (3), so that high-temperature water which flows out of the preheater (6) and is deaerated by the deaerator (7) can respectively flow back to the steam drum (2) and the heat accumulator (3); the bottom of the steam pocket (2) is also connected with the evaporative cooling flue (1) through a third water pump (9), so that undersaturated water in the steam pocket (2) can be driven by the third water pump (9) to directly flow back to the evaporative cooling flue (1), and cyclic utilization of waste heat gas in the evaporative cooling flue (1) is realized.
2. The calcium carbide furnace cooling waste heat power generation system of claim 1, wherein: the organic working medium condenser (12) is connected with a cooling pipeline, the cooling pipeline is connected with a cooling tower (14) used for providing cooling media for the cooling pipeline, and the cooling pipeline is further connected with a fourth water pump (15).
3. The calcium carbide furnace cooling waste heat power generation system of claim 1, wherein: the organic working medium is pentafluoropropane.
4. The calcium carbide furnace cooling waste heat power generation system of claim 1, wherein: the deaerator (7) is connected with a water jet air ejector (16), the water jet air ejector (16) is connected with the water tank (17) through a water return pipe, and a fifth water pump (18) is connected to the water return pipe, so that water flow in the water tank (17) enters the water jet air ejector (16) and is returned to the water tank (17) after being flushed out along with gas in the deaerator (7) by the water jet air ejector (16).
5. The calcium carbide furnace cooling waste heat power generation system of claim 1, wherein: the top of the deaerator (7) is connected with a water ring vacuum pump (19).
6. The calcium carbide furnace cooling waste heat power generation system of claim 1, wherein: the first water pump (4) is connected with an inlet of the deaerator (7) through the plate type heat exchanger (20).
7. The calcium carbide furnace cooling waste heat power generation system of claim 1, wherein: the second water pump (8) is connected with the vaporization cooling flue (1) to realize emergency and safe water supplement from the deaerator (7) to the vaporization cooling flue (1).
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| CN201921333645.1U CN211078487U (en) | 2019-08-16 | 2019-08-16 | Calcium carbide furnace cooling waste heat power generation system |
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| CN110540205A (en) * | 2019-08-16 | 2019-12-06 | 中信重工机械股份有限公司 | calcium carbide furnace cooling waste heat power generation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110540205A (en) * | 2019-08-16 | 2019-12-06 | 中信重工机械股份有限公司 | calcium carbide furnace cooling waste heat power generation system |
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