CN210154355U - Indirect heat extraction method high temperature sediment waste heat recycle system - Google Patents
Indirect heat extraction method high temperature sediment waste heat recycle system Download PDFInfo
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- CN210154355U CN210154355U CN201920792122.7U CN201920792122U CN210154355U CN 210154355 U CN210154355 U CN 210154355U CN 201920792122 U CN201920792122 U CN 201920792122U CN 210154355 U CN210154355 U CN 210154355U
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- 238000000605 extraction Methods 0.000 title claims abstract description 77
- 239000002918 waste heat Substances 0.000 title claims abstract description 25
- 239000013049 sediment Substances 0.000 title description 11
- 239000002893 slag Substances 0.000 claims abstract description 150
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000004062 sedimentation Methods 0.000 claims abstract description 68
- 238000003860 storage Methods 0.000 claims abstract description 58
- 238000007599 discharging Methods 0.000 claims abstract description 20
- 238000004064 recycling Methods 0.000 claims abstract description 10
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 17
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 5
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 6
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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Abstract
The utility model discloses a high-temperature slag waste heat recycling system adopting an indirect heat extraction method, which comprises a high-temperature slag bin, a heat extraction bin, a sedimentation tank and a working medium storage tank; the bottom of the high-temperature slag bin is provided with a slag feeding port, the slag feeding port is connected with a slag inlet of the heat extraction bin, the upper part of the heat extraction bin is provided with a high-pressure working medium inlet, the high-pressure working medium inlet is connected with a working medium storage pool, the bottom of the heat extraction bin is provided with a slag discharging port, the slag discharging port is connected with a sedimentation tank, and the sedimentation tank is connected with the working medium storage pool; the sedimentation tank is a one-stage or multi-stage sedimentation tank, and an overflow port at the top of the sedimentation tank is connected with a working medium storage tank; the hot water inlet of the heat utilization unit is connected with the circulating water outlet. The system has high waste heat utilization rate, simple and reliable equipment structure and simple and convenient process control, and overcomes the defect that waste heat utilization is difficult due to poor heat conductivity of certain high-temperature slag, such as magnesium metal reducing slag and calcium metal reducing slag.
Description
Technical Field
The utility model relates to an indirect heat extraction method high temperature sediment waste heat recovery utilizes system belongs to chemical industry waste heat recovery and utilizes technical field.
Background
High-temperature slag, reducing slag and the like discharged by the metallurgy and energy industries such as thermal power plant boilers, iron-making blast furnaces, silicothermic reduction of metal magnesium, aluminothermic reduction of metal calcium and the like have the highest temperature of 1600 ℃, carry a large amount of sensible heat, and cause extreme waste of energy if the waste heat is not recycled or is not properly recycled. Taking the silicothermic reduction of magnesium metal as an example, for every 1 ton of magnesium metal produced, about 5.5 tons of reduced magnesium slag are produced, leaving the reduction tank at a temperature of about 1200 ℃. And calculating by professor Chengjinqing of Jiangxi Ringchang university, and in the temperature range of 1200-25 ℃, the specific heat capacity of the reduced magnesium slag is about 871J/kg, namely, the reduced magnesium slag generated by producing 1 ton of metal magnesium is cooled from 1200 ℃ to 25 ℃, and the released sensible heat is equivalent to the heat released by burning about 192.5kg of standard coal. The annual yield of magnesium smelting by a silicothermic method in China is calculated according to 90 ten thousand tons at present, the utilization rate of the waste heat of the reduced magnesium slag is calculated according to 60%, the recovered waste heat is equivalent to the heat released by burning about 10.5 ten thousand tons of standard coal, and meanwhile, the emission of harmful substances such as carbon dioxide, sulfur dioxide, dust and the like is reduced, so that the method has great economic value and great social and environmental protection values.
At present, in the industry, for the treatment of the reduced magnesium slag, one is to utilize cooling water to spray and cool the hot reduced magnesium slag through a slag cooler and generate a small amount of hot water and steam at the same time. The slag cooler has the disadvantages that the slag cooler belongs to a semi-open motion type system, the sealing of the system is difficult to realize, the hot water separation and the collection of water vapor are difficult to realize, and the available value is not high. The other is through a waste heat boiler, and the defects are that the device is static heat transfer, the heat transfer efficiency is low, and the processing capacity is limited. The third is a tubular heat exchanger, which utilizes gravity to lead the reduced magnesium slag to fall from top to bottom, and the reduced magnesium slag passes through the tubular heat exchanger to heat working medium water in the heat exchanger in the falling process.
To thermal power factory high temperature sediment, one kind is through the cooling slag of recirculated cooling water cooling, and the recirculated water goes into the cooling tower with the sediment surplus heat and discharges into the atmosphere, though solved the quick refrigerated problem of sediment, nevertheless, the sediment heat can not effectively be utilized, influences boiler thermal efficiency, and the front of a business over for the business of recirculated water also causes the waste of water resource to a certain extent moreover, also causes thermal pollution to the environment simultaneously. The second is to adopt a fluidized bed slag cooler, after high-temperature slag is cooled by a fluidizing agent (air or low-temperature flue gas), the low-temperature slag is discharged into a slag removal system, and the heated fluidizing agent carries a small amount of fine particles and is sent back to the hearth by an air return pipe.
The blast furnace slag is liquid at high temperature, is gradually cooled in the process of releasing sensible heat, can generate phase change and solidification, and can be solidified and bonded on a heat exchanger if the heat is indirectly recovered through the heat exchanger, so that solid particles or slices are obtained by granulation in advance, and waste heat recovery is carried out. The typical process for sensible heat recovery of iron smelting blast furnace slag is introduced in 'blast furnace slag dry sensible heat recovery technology research progress' by Xuyongtong, etc. of the process engineering research institute of Chinese academy of sciences: several typical blast furnace slag sensible heat recovery processes, such as a cooling drum method slag flake solidification process, a continuous casting and rolling method slag flat solidification process, a mechanical stirring method slag granulation process, a rotating drum method slag granulation process, a Merotec slag granulation process, a wind-breaking method blast furnace slag sensible heat recovery process, a rotating cup granulation slag sensible heat recovery process and the like, have respective defects. For example, the waste heat recovery system is complex, the process is complex and difficult to control, and the like. By utilizing the high-temperature slag granulation process, a part of sensible heat and phase change heat from liquid to solid are dissipated.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes above-mentioned prior art is not enough, provides an indirect heat extraction method high temperature sediment waste heat recycle system, and this system waste heat utilization rate is high, equipment structure is simple reliable, process control is simple and convenient to certain high temperature sediment has been compensatied, for example magnesium metal reduction sediment, calcium metal reduction sediment, the poor not enough that leads to the waste heat utilization difficulty of heat conductivity.
The utility model discloses a following technical scheme realizes:
a high-temperature slag waste heat recycling system adopting an indirect heat extraction method comprises a high-temperature slag bin, a heat extraction bin, a sedimentation tank and a working medium storage tank;
the bottom of the high-temperature slag bin is provided with a slag feeding port, the slag feeding port is connected with a slag inlet of the heat extraction bin, the upper part of the heat extraction bin is provided with a high-pressure working medium inlet, the high-pressure working medium inlet is connected with a working medium storage pool, the bottom of the heat extraction bin is provided with a slag discharging port, the slag discharging port is connected with a sedimentation tank, and the sedimentation tank is connected with the working medium storage pool;
the high-temperature slag bin is built by refractory materials, a slag feeder is arranged in the slag feeding port, a cooling water jacket is arranged on the outer wall of the slag feeding port, circulating cooling water is arranged in the cooling water jacket, a cooling water inlet is arranged at the lower part of the cooling water jacket, a cooling water outlet is arranged at the upper part of the cooling water jacket, and the cooling water inlet is connected with a water storage tank through a high-pressure water pump;
the heat extraction bin comprises a top slag inlet, a main heat exchanger positioned at the lower part of the slag inlet, a high-pressure working medium inlet, a heat extraction area positioned at the lower part and a bottom slag outlet, wherein the main heat exchanger comprises a circulating water inlet and a circulating water outlet, the circulating water inlet is connected with a cooling water outlet, the circulating water outlet is connected with a heat unit, one or more high-pressure working medium inlets are arranged at the upper part of the heat extraction bin, and the high-pressure working medium inlets are arranged at the upper part of the main heat exchanger; the slag discharging port is provided with a slag discharging device;
the sedimentation tank is a one-stage or multi-stage sedimentation tank, a cold slag outlet is arranged at the bottom of the sedimentation tank, an overflow port is arranged at the top of the sedimentation tank, and the overflow port is connected with a working medium storage tank;
the upper part of the working medium storage pool is provided with a high-pressure working medium inlet which is connected with the heat extraction bin through a working medium output pipeline and a high-pressure pump, and the working medium storage pool is also provided with a working medium supplement pipeline;
the hot water inlet of the heat utilization unit is connected with a circulating water outlet, the cold water outlet is connected with a water storage tank, and the water storage tank is also provided with a water replenishing pipe.
And a filtering device is also arranged on the working medium output pipeline.
The heat utilization unit is a steam turbine and a heating radiator.
The top of the heat extraction bin is also provided with a pressure sensor and a pressure relief safety valve.
The sedimentation tank is multistage sedimentation tank of establishing ties, and the one-level sedimentation tank is connected and is extracted the hot storehouse and arrange the cinder notch, the one-level sedimentation tank top sets up the overflow mouth, the second grade sedimentation tank is connected to the overflow mouth, the second grade sedimentation tank top sets up the overflow mouth and connects next stage sedimentation tank, and working medium storage tank is connected to last one-level sedimentation tank overflow mouth.
And the sedimentation tank is also internally provided with a heat exchanger which is connected with a pipeline of a cooling water inlet and used for preheating the cooling water.
The upper part of the heat extraction bin is also provided with a steam outlet which is connected with a heat unit.
Compared with the prior art, the beneficial effects of the utility model are that:
the method is suitable for but not limited to the preparation of magnesium, calcium, sodium, iron by a thermal reduction method and the recovery of sensible heat carried by high-temperature waste slag such as powdery or fine-grained slag, reducing slag and the like in other industrial production processes, can improve the energy utilization efficiency, can reduce thermal pollution, indirectly reduces the emission of waste gases such as carbon dioxide, sulfur dioxide and the like, and has good social and economic values and environmental values.
Drawings
Fig. 1 is a process route diagram of the indirect heat extraction method of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 2 of the present invention.
In the figure, a high-temperature slag bin 1, a slag feeding port 2, a heat extraction bin 3, a primary sedimentation tank 4, a working medium storage tank 5, a slag feeding device 6, a slag inlet 7, a high-pressure working medium inlet 9, a slag discharge port 10, a heat utilization unit 11, a working medium storage tank 13, a slag discharge device 14, a secondary sedimentation tank 15, a heat extraction area 18, a cold slag outlet 22, a working medium output pipeline 23, a high-pressure pump 24, a working medium supplement pipeline 25, a filtering device 26, a temperature measuring device 27, a heat exchanger 28, a cooling water jacket 29, a cooling water inlet 291, a cooling water outlet 292, a pressure sensor 31, a pressure relief safety valve 32, a high-pressure water pump 40, a water storage tank 41, a main heat exchanger 42, a circulating water inlet 421, a circulating water outlet 422, a water supplementing pipe 44.
Detailed Description
The invention is further illustrated below with reference to the following examples and drawings:
example 1
A high-temperature slag waste heat recycling system adopting an indirect heat extraction method comprises a high-temperature slag bin 1, a heat extraction bin 3, a sedimentation tank and a working medium storage tank 5;
the bottom of the high-temperature slag bin is provided with a slag feeding port 2, the slag feeding port 2 is connected with a slag inlet 7 of the heat extraction bin, the upper part of the heat extraction bin 3 is provided with a high-pressure working medium inlet 9, the high-pressure working medium inlet 9 is connected with a working medium storage pool 5, the bottom of the heat extraction bin 3 is provided with a slag discharging port 10, the slag discharging port 10 is connected with a sedimentation pool, and the sedimentation pool is connected with the working medium storage pool 5;
the high-temperature slag bin 1 is built by refractory materials, a slag feeder 6 is arranged in the slag feeding port 2, a cooling water jacket 29 is arranged on the outer wall of the slag feeding port 2, circulating cooling water is arranged in the cooling water jacket, a cooling water inlet 291 is arranged at the lower part of the cooling water jacket 29, a cooling water outlet 292 is arranged at the upper part of the cooling water jacket, and the cooling water inlet 291 is connected with a water storage tank 41 through a high-pressure water pump 40;
the heat extraction bin 3 comprises a top slag inlet 7, a main heat exchanger 42 positioned at the lower part of the slag inlet 7, a high-pressure working medium inlet 9, a heat extraction area 18 positioned at the lower part and a bottom slag discharge port 10, wherein the main heat exchanger 42 comprises a circulating water inlet 421 and a circulating water outlet 422, the circulating water inlet 421 is connected with a cooling water outlet 292, the circulating water outlet 422 is connected with a heat unit 11, one or more high-pressure working medium inlets 9 are arranged at the upper part of the heat extraction bin 3, and the high-pressure working medium inlet 9 is arranged at the upper part of the main heat exchanger 42; the slag discharging port 10 is provided with a slag discharging device 14; the slag extractor is connected with a slag outlet at the lower part of the heat extraction bin, and is used for realizing sealing and pressure maintaining of the heat extraction bin while discharging slag.
The sedimentation tank is a multi-stage sedimentation tank connected in series and is used for settling and separating a mixture of slag discharged from the heat extraction bin and the working medium. A cold slag outlet 22 is arranged at the bottom of the sedimentation tank; the primary sedimentation tank 4 is connected with a slag discharge port 10 of a heat extraction bin, the top of the primary sedimentation tank 4 is provided with an overflow port, the overflow port is connected with a secondary sedimentation tank 15, the top of the secondary sedimentation tank is provided with an overflow port connected with the next primary sedimentation tank, and the overflow port of the last primary sedimentation tank is connected with a working medium storage tank 13;
the upper part of the working medium storage pool 5 is provided with a high-pressure working medium inlet 9 which is connected with the heat extraction bin 3 through a working medium output pipeline 23 and a high-pressure pump 24, and the working medium storage pool 5 is also provided with a working medium supplement pipeline 25;
the working medium storage pool has the functions that: 1) the method comprises the steps of (1) storage of a supplementary working medium, 2) storage of a backflow working medium, 3) recovery and storage of a clarified working medium separated by a sedimentation tank, and 4) supply of a cold working medium to a heat extraction bin through a high-pressure pump and a pumping pipeline.
The hot water inlet of the heat utilization unit 11 is connected with a circulating water outlet 422, the cold water outlet is connected with a water storage tank 41, and the water storage tank is also provided with a water replenishing pipe 44.
The working medium output pipeline 23 is also provided with a filtering device 26, so that a small amount of impurities in the working medium storage tank 13 are prevented from entering the high-pressure pump to cause blockage or damage, and smooth production is influenced.
The heat utilization unit 11 is a steam turbine and a heating radiator.
The top of the heat extraction bin 3 is also provided with a pressure sensor 31 and a pressure relief safety valve 32.
And a heat exchanger 18 is further arranged in the primary sedimentation tank, and the heat exchanger 28 is connected with a pipeline of a cooling water inlet 291 and used for preheating cooling water.
The upper part of the heat extraction bin 3 can be also provided with a steam outlet which is connected with a heat unit.
The system is suitable for but not limited to the preparation of magnesium, calcium, sodium, iron by a thermal reduction method and the recovery of sensible heat carried by high-temperature waste slag such as powdery or fine-grained slag, reducing slag and the like in other industrial production processes, can improve the energy utilization efficiency, can reduce thermal pollution, indirectly reduces the emission of waste gases such as carbon dioxide, sulfur dioxide and the like, and has good social and economic values and environmental values.
The high-temperature slag is transported and stored in a high-temperature slag bin, enters a heat extraction bin through a slag feeder, falls below the liquid level of a working medium 50 in the bin, and releases heat to the working medium 50 to increase the temperature of the working medium. The reducing slag after heat release sinks to the position of a slag outlet below the heat extraction bin to realize the primary separation of slag and working medium, and enters a primary sedimentation tank below through a slag discharger to perform secondary separation of slag 52 and the working medium 50; the working medium subjected to primary precipitation separation enters a secondary sedimentation tank from an overflow port above the primary sedimentation tank to perform tertiary separation … … of slag and the working medium until the working medium is clarified, and flows back to the heat extraction bin through a working medium output pipeline 23 and a high-pressure pump 24 to continuously participate in heat extraction.
The medium water in the water storage tank is preheated by a preheating heat exchanger, a water jacket and the like through a high-pressure water pump, then enters a main heat exchanger in a heat extraction bin, is heated by a working medium after heat extraction to become hot water or water vapor which reaches a working state, and enters a heat utilization unit for heat supply through a circulating pipeline. The heat extraction medium water obtained by cooling or condensing after heat supply flows back to the water storage tank through a pipeline.
Example 2
A high-temperature slag waste heat recycling system adopting an indirect heat extraction method comprises a high-temperature slag bin 1, a heat extraction bin 3, a sedimentation tank and a working medium storage tank 5;
the bottom of the high-temperature slag bin is provided with a slag feeding port 2, the slag feeding port 2 is connected with a slag inlet 7 of the heat extraction bin, the upper part of the heat extraction bin 3 is provided with a high-pressure working medium inlet 9, the high-pressure working medium inlet 9 is connected with a working medium storage pool 5, the bottom of the heat extraction bin 3 is provided with a slag discharging port 10, the slag discharging port 10 is connected with a sedimentation pool, and the sedimentation pool is connected with the working medium storage pool 5;
the high-temperature slag bin 1 is built by refractory materials, a slag feeder 6 is arranged in the slag feeding port 2, a cooling water jacket 29 is arranged on the outer wall of the slag feeding port 2, circulating cooling water is arranged in the cooling water jacket, a cooling water inlet 291 is arranged at the lower part of the cooling water jacket 29, a cooling water outlet 292 is arranged at the upper part of the cooling water jacket, and the cooling water inlet 291 is connected with a water storage tank 41 through a high-pressure water pump 40;
the heat extraction bin 3 comprises a top slag inlet 7, a main heat exchanger 42 positioned at the lower part of the slag inlet 7, a high-pressure working medium inlet 9, a heat extraction area 18 positioned at the lower part and a bottom slag discharge port 10, wherein the main heat exchanger 42 comprises a circulating water inlet 421 and a circulating water outlet 422, the circulating water inlet 421 is connected with a cooling water outlet 292, the circulating water outlet 422 is connected with a heat unit 11, one or more high-pressure working medium inlets 9 are arranged at the upper part of the heat extraction bin 3, and the high-pressure working medium inlet 9 is arranged at the upper part of the main heat exchanger 42; the slag discharging port 10 is provided with a slag discharging device 14; the slag extractor is connected with a slag outlet at the lower part of the heat extraction bin, and is used for realizing sealing and pressure maintaining of the heat extraction bin while discharging slag.
The sedimentation tank is a primary sedimentation tank, the primary sedimentation tank 4 is connected with a slag discharge port 10 of the heat extraction bin, the bottom of the primary sedimentation tank 4 is provided with a cold slag outlet 22, the top of the primary sedimentation tank is provided with an overflow port, and the overflow port is connected with a working medium storage tank 13;
the upper part of the working medium storage pool 5 is provided with a high-pressure working medium inlet 9 which is connected with the heat extraction bin 3 through a working medium output pipeline 23 and a high-pressure pump 24, and the working medium storage pool 5 is also provided with a working medium supplement pipeline 25;
the working medium storage pool has the functions that: 1) the method comprises the steps of (1) storage of a supplementary working medium, 2) storage of a backflow working medium, 3) recovery and storage of a clarified working medium separated by a sedimentation tank, and 4) supply of a cold working medium to a heat extraction bin through a high-pressure pump and a pumping pipeline.
The hot water inlet of the heat utilization unit 11 is connected with a circulating water outlet 422, the cold water outlet is connected with a water storage tank 43, and the water storage tank is also provided with a water replenishing pipe 44.
The working medium output pipeline 23 is also provided with a filtering device 26, so that a small amount of impurities in the working medium storage tank 13 are prevented from entering the high-pressure pump to cause blockage or damage, and smooth production is influenced.
The heat utilization unit 11 is a steam turbine and a heating radiator.
The top of the heat extraction bin 3 is also provided with a pressure sensor 31 and a pressure relief safety valve 32.
The sedimentation tank is also internally provided with a heat exchanger 18, and the heat exchanger 28 is connected with a pipeline of a cooling water inlet 291 and used for preheating cooling water.
The foregoing shows and describes the general principles of the present invention, its essential features, and advantages, and thus, the present invention has been described in considerable detail with particularity and detail without limitation to the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (7)
1. A high-temperature slag waste heat recycling system adopting an indirect heat extraction method is characterized by comprising a high-temperature slag bin, a heat extraction bin, a sedimentation tank and a working medium storage tank;
the bottom of the high-temperature slag bin is provided with a slag feeding port, the slag feeding port is connected with a slag inlet of the heat extraction bin, the upper part of the heat extraction bin is provided with a high-pressure working medium inlet, the high-pressure working medium inlet is connected with a working medium storage pool, the bottom of the heat extraction bin is provided with a slag discharging port, the slag discharging port is connected with a sedimentation tank, and the sedimentation tank is connected with the working medium storage pool;
the high-temperature slag bin is built by refractory materials, a slag feeder is arranged in the slag feeding port, a cooling water jacket is arranged on the outer wall of the slag feeding port, circulating cooling water is arranged in the cooling water jacket, a cooling water inlet is arranged at the lower part of the cooling water jacket, a cooling water outlet is arranged at the upper part of the cooling water jacket, and the cooling water inlet is connected with a water storage tank through a high-pressure water pump;
the heat extraction bin comprises a top slag inlet, a main heat exchanger positioned at the lower part of the slag inlet, a high-pressure working medium inlet, a heat extraction area positioned at the lower part and a bottom slag outlet, wherein the main heat exchanger comprises a circulating water inlet and a circulating water outlet, the circulating water inlet is connected with a cooling water outlet, the circulating water outlet is connected with a heat unit, one or more high-pressure working medium inlets are arranged at the upper part of the heat extraction bin, and the high-pressure working medium inlets are arranged at the upper part of the main heat exchanger; the slag discharging port is provided with a slag discharging device;
the sedimentation tank is a one-stage or multi-stage sedimentation tank, a cold slag outlet is arranged at the bottom of the sedimentation tank, an overflow port is arranged at the top of the sedimentation tank, and the overflow port is connected with a working medium storage tank;
the upper part of the working medium storage pool is provided with a high-pressure working medium inlet which is connected with the heat extraction bin through a working medium output pipeline and a high-pressure pump, and the working medium storage pool is also provided with a working medium supplement pipeline;
the hot water inlet of the heat utilization unit is connected with a circulating water outlet, the cold water outlet is connected with a water storage tank, and the water storage tank is also provided with a water replenishing pipe.
2. The system for recycling the high-temperature slag waste heat by the indirect heat extraction method according to claim 1, wherein a filtering device is further arranged on the working medium output pipeline.
3. The system for recycling high-temperature slag waste heat by using the indirect heat extraction method according to claim 1, wherein the heat utilization units are steam turbines and heating radiators.
4. The system for recycling the high-temperature slag waste heat by the indirect heat extraction method according to claim 1, wherein a pressure sensor and a pressure relief safety valve are further arranged at the top of the heat extraction bin.
5. The system according to claim 1, wherein the sedimentation tank is a multi-stage sedimentation tank connected in series, the first-stage sedimentation tank is connected with the slag discharge port of the heat extraction bin, the top of the first-stage sedimentation tank is provided with an overflow port, the overflow port is connected with the second-stage sedimentation tank, the top of the second-stage sedimentation tank is provided with an overflow port connected with the next-stage sedimentation tank, and the overflow port of the last-stage sedimentation tank is connected with the working medium storage tank.
6. The system for recycling the high-temperature slag waste heat through the indirect heat extraction method according to claim 1, wherein a heat exchanger is further arranged in the sedimentation tank, is connected with a pipeline of a cooling water inlet, and preheats the cooling water.
7. The system for recycling the high-temperature slag waste heat by the indirect heat extraction method according to claim 1, wherein a steam outlet is further arranged at the upper part of the heat extraction bin, and the steam outlet is connected with a heat unit.
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Denomination of utility model: A system for indirect extraction of high-temperature slag waste heat recovery and utilization Effective date of registration: 20231020 Granted publication date: 20200317 Pledgee: Wenxi County Branch of China Postal Savings Bank Co.,Ltd. Pledgor: SHANXI BADA MAGNESIUM Co.,Ltd. Registration number: Y2023140000061 |