CN117703595A - Totally-enclosed submerged arc furnace gas grading utilization system - Google Patents
Totally-enclosed submerged arc furnace gas grading utilization system Download PDFInfo
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- CN117703595A CN117703595A CN202311626564.1A CN202311626564A CN117703595A CN 117703595 A CN117703595 A CN 117703595A CN 202311626564 A CN202311626564 A CN 202311626564A CN 117703595 A CN117703595 A CN 117703595A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
- F02C6/18—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use using the waste heat of gas-turbine plants outside the plants themselves, e.g. gas-turbine power heat plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/22—Fuel supply systems
- F02C7/224—Heating fuel before feeding to the burner
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/14—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects using gases or vapours other than air or steam, e.g. inert gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/02—Heating arrangements using combustion heating
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention provides a gas grading utilization system of a fully-closed submerged arc furnace, which is characterized by comprising a gas screw compressor unit, a gas buffer assembly, a gas heating assembly, a micro-combustion unit, a drying rotary kiln unit and a connecting pipeline. The method realizes the graded recycling of the submerged arc furnace gas resources according to the quality, generates power in a high-quality stage, is used for drying or preheating materials in a low-quality flue gas stage, realizes the twice utilization of primary energy, and achieves the comprehensive utilization efficiency of the energy of 65% -75%. The micro-gas turbine is used for generating power, water is not needed, water vapor is not generated, and secondary environmental pollution caused by desalted water preparation is avoided. The micro-combustion engine and the drying rotary kiln can be used as a peak regulation of a coal gas system of the whole factory, and coal gas does not need to be unburnt and dispersed, so that the waste of resources is avoided.
Description
Technical Field
The invention relates to a system, in particular to a fully-closed submerged arc furnace gas grading utilization system, and belongs to the technical field of metallurgy.
Background
The submerged arc furnace gas is an excellent fuel, and the main components of the submerged arc furnace gas are CO and about 10% of H 2 And a small amount of other components, wherein the lower calorific value is 7000-11000 kJ/Nm. Generally, the utilization of industrial gas waste heat resources is single, steam is mostly generated by using a boiler to drive a steam turbine to generate electricity, and then flue gas is discharged, so that the utilization efficiency of the whole energy source is 22% -40%. Or the fuel is used as fuel to enter a material drying system and a preheating system for combustion, and the utilization efficiency is 30% -40%. Such inefficient utilization will result in significant waste of the excess energy and also increase unnecessary cost input to the enterprise. There is therefore a need for improvements in the art.
Disclosure of Invention
The invention provides a gas grading utilization system of a fully-closed submerged arc furnace, which aims to solve the problem of large resource waste caused by poor utilization efficiency of gas generated by the existing fully-closed submerged arc furnace.
The invention is completed by the following technical scheme: the gas grading utilization system of the fully-closed submerged arc furnace is characterized by comprising a gas screw compressor unit, a gas buffer component, a gas heating component, a micro-combustion unit, a drying rotary kiln unit and a connecting pipeline;
the gas screw compressor unit comprises: a plurality of gas screw compressors communicated with an external submerged arc furnace gas main pipe;
the gas buffering assembly includes: a gas buffer tank in communication with the gas screw compressor;
the gas heating assembly is divided into a gas electric heater and a smoke heat exchanger, and the gas electric heater and the smoke heat exchanger are communicated with the gas buffer tank through connecting pipelines;
the micro-gas engine unit is provided with a plurality of micro-gas engines, the gas input end of which is communicated with the gas electric heater and the smoke heat exchanger, and the high-temperature smoke output end of the plurality of micro-gas engines is communicated with the smoke heat exchanger and a plurality of drying rotary kilns in the drying rotary kiln unit through connecting pipelines;
the coal gas generated by the submerged arc furnace is pressurized through the coal gas screw compressor unit and then is sent into the coal gas buffer assembly to be dehydrated and stabilized, the dehydrated and stabilized coal gas is heated through the coal gas heating assembly, the generated electric energy is combined into a power grid for a user to use, the high-temperature flue gas generated by power generation can be sent to the flue gas heat exchanger to provide a heat source for heating the coal gas, and then is sent to the drying rotary kiln unit to provide heat energy for drying materials, so that the utilization rate of the submerged arc furnace coal gas is effectively improved, and the waste of energy is avoided.
The gas screw compressors are at least two in parallel, the input end of each gas screw compressor is communicated with the coal gas main pipe of the submerged arc furnace through a first input branch pipe, the output end of each gas screw compressor is communicated with the input end of a corresponding gas buffer tank through a first output branch pipe, and a first communication branch pipe is arranged between the two first output branch pipes so as to improve the pressure of the coal gas from the submerged arc furnace to 0.6-0.9 MPa through the gas screw compressors, and the pressure of the coal gas entering the micro-gas engine is ensured to meet the requirements.
The gas pressure and temperature monitoring device is characterized in that an inlet explosion-proof electric butterfly valve, a manhole on which a purging head is arranged, an inlet explosion-proof electric blind plate valve, an inlet pressure sensor and an inlet temperature sensor are sequentially arranged on the first input branch pipe, an outlet pressure sensor, an outlet temperature sensor and two outlet explosion-proof electric stop valves which are arranged in series are sequentially arranged on the first output branch pipe, and a plurality of purging and diffusing pipes are arranged on the first input branch pipe and the first output branch pipe so as to monitor the pressure and the temperature of gas entering and leaving the gas screw compressor and ensure the operation safety of the pipeline.
The first communication branch pipe is provided with an explosion-proof electric cut-off valve and a purging diffusing pipe so as to convey coal gas to the two coal gas buffer tanks at the same time and ensure the operation safety of the pipeline.
The gas buffer tanks are at least two in parallel, the input end of each gas buffer tank is connected with the first communication branch pipe through the second input branch pipe, the output end of each gas buffer tank is connected with the second output branch pipe, the second output branch pipes on the two gas buffer tanks are respectively connected with the two ends of the second communication branch pipes, the second communication branch pipes are communicated with the gas heating assembly through the gas heating conveying pipe so as to balance high-frequency fluctuation of gas pressure and flow through the gas buffer tanks, and gas condensate water in the gas is separated through gravity.
The second input branch pipe is sequentially provided with a purging and diffusing pipe and a gas inlet cut-off valve, the second output branch pipe is sequentially provided with a gas outlet manual cut-off valve, a purging and diffusing pipe and an explosion-proof electric cut-off valve, the bottom of the gas buffer tank is provided with a drain pipe on which the explosion-proof electric drain cut-off valve is arranged, and the top of the gas buffer tank is provided with the purging and diffusing pipe and a safety valve so as to ensure the running safety of the pipeline.
The gas heating conveying pipe is characterized in that the input end of the gas heating conveying pipe is connected with a second communication branch pipe, the output end of the gas heating conveying pipe is connected with the input end of the gas electric heater and the input end of the smoke heat exchanger through a third input branch pipe, a purging and diffusing pipe, an explosion-proof electric stop valve, a rotor flowmeter, a manual stop valve and an outlet pipe temperature sensor are sequentially arranged on the gas heating conveying pipe, a bypass pipe is arranged between the second communication branch pipe and the gas heating conveying pipe behind the manual stop valve, and the purging and diffusing pipe and the bypass stop valve are sequentially arranged on the bypass pipe so as to safely and stably convey gas to the gas heating assembly through the gas heating conveying pipe.
The gas electric heater is arranged as a conventional explosion-proof gas electric heater, the input end of the gas electric heater is connected with a gas heating conveying pipe through a third input branch pipe, the output end of the gas electric heater is connected with a micro-gas engine gas conveying pipe through a third output branch pipe, a purging and diffusing pipe and an explosion-proof electric stop valve are sequentially arranged on the third input branch pipe in front of the input end of the gas electric heater, and the purging and diffusing pipe and the explosion-proof electric stop valve are sequentially arranged on the third output branch pipe behind the output end of the gas electric heater so as to heat gas before entering the micro-gas engine through the explosion-proof gas electric heater, so that condensed water in the gas is vaporized and liquid water drops are prevented from entering the micro-gas engine.
The gas input end of the gas heat exchanger is connected with a third input branch pipe, the gas output end of the gas heat exchanger is connected with a gas conveying pipe of the micro-combustor through a third output branch pipe, the high-temperature gas input end of the gas heat exchanger is connected with a gas discharge port of the micro-combustor through a gas input pipe, the output end of the gas heat exchanger is communicated with a drying rotary kiln unit through a gas output pipe, a purging diffusion pipe and an explosion-proof electric stop valve are sequentially arranged on the third input branch pipe in front of the gas input end, a heat pipe heat exchanger outlet temperature sensor, an explosion-proof electric stop valve and a purging diffusion pipe are sequentially arranged on the third output branch pipe behind the gas output end, and the gas output pipe is also connected with an accident diffusion pipe on which the gas accident discharge valve of the micro-combustor is arranged, so that the gas is heated through high-temperature gas generated by the micro-combustor, and the utilization of high-temperature gas is effectively ensured.
The micro-gas turbine is a conventional micro-gas turbine, a gas input end of the micro-gas turbine is connected with a micro-gas turbine gas conveying pipe through a fourth input branch pipe, a high-temperature gas output end is connected with a gas input pipe through a fourth output branch pipe, an air inlet pressure sensor, an air inlet temperature sensor, a manual air inlet shut-off valve, a blowing and diffusing pipe, a rotameter, an explosion-proof electric shut-off valve and an explosion-proof electric air inlet main valve of the micro-gas turbine are sequentially arranged on the fourth input branch pipe, a pollution discharge blowing valve and an on-duty explosion-proof electric butterfly valve are further arranged at the tail end of the fourth input branch pipe, and a micro-gas turbine gas outlet electric butterfly valve is arranged on the fourth output branch pipe so as to burn ore-smelting furnace gas through the micro-gas turbine, thereby converting gas energy into electric energy, and then the electric energy is used in a factory after being integrated into an electric network in a factory, surplus ore-smelting furnace gas is effectively utilized, and consumption of energy is reduced.
The rotary kiln is arranged as conventional equipment, the high-temperature flue gas input end of the rotary kiln is connected with the flue gas output pipe through a fifth input branch pipe, the exhaust gas discharge port is communicated with the rotary kiln flue gas discharge control device, and the rotary kiln gas burner input end of the rotary kiln is connected with the submerged arc furnace gas main pipe through a sixth input branch pipe, so that the high-temperature flue gas generated by the micro-combustion engine provides a drying heat source for the rotary kiln during normal operation of the micro-combustion engine, and when the high-temperature flue gas supply is insufficient due to the fault of the micro-combustion engine or other reasons, the submerged arc furnace gas is combusted by the rotary kiln gas burner of the rotary kiln to provide the drying heat source, so that the submerged arc furnace gas is effectively utilized.
The fifth input branch pipe is sequentially provided with an electric regulating butterfly valve, a manual butterfly valve and a smoke temperature sensor, the sixth input branch pipe is sequentially provided with a plurality of explosion-proof electric butterfly valves, explosion-proof electric gate valves, a plurality of manholes with purging heads, a temperature sensor and a pressure sensor, and a plurality of purging and diffusing pipes are arranged between the explosion-proof electric butterfly valves and the explosion-proof electric gate valves so as to ensure the safety of gas supply.
The invention has the following advantages and effects: by adopting the scheme, the coal gas resource of the submerged arc furnace is recycled according to the quality in a grading manner, power generation is performed in a high-quality stage, and the coal gas resource is used for drying or preheating materials in a low-quality flue gas stage, so that the primary energy is utilized twice, and the comprehensive energy utilization efficiency reaches 65% -75%. The micro-gas turbine is used for generating power, water is not needed, water vapor is not generated, and secondary environmental pollution caused by desalted water preparation is avoided. The micro-combustion engine and the drying rotary kiln can be used as a peak regulation of a coal gas system of the whole factory, and coal gas does not need to be unburnt and dispersed, so that the waste of resources is avoided.
Drawings
FIG. 1 is a system diagram of the present invention;
FIG. 2 is a block diagram of the gas screw compressor unit of FIG. 1;
FIG. 3 is a block diagram of the gas buffering assembly of FIG. 1;
FIG. 4 is a block diagram of the gas heating assembly of FIG. 1;
FIG. 5 is a connection diagram of the micro-turbine unit input end pipeline of FIG. 1;
FIG. 6 is a connection diagram of the output end pipeline of the micro-turbine unit of FIG. 1;
FIG. 7 is a diagram of a flue gas input pipeline of the rotary kiln assembly of FIG. 1;
FIG. 8 is a pipe diagram of the input end of the rotary kiln gas burner of FIG. 1;
fig. 9 is a diagram of the gas heating and conveying pipeline in fig. 1.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples
A gas grading utilization system of a fully-closed submerged arc furnace comprises a gas screw compressor unit 2, a gas buffer component 3, a gas heating component 5, a micro-combustion unit 4, a drying rotary kiln unit 6 and a connecting pipeline;
the gas screw compressor unit 2 includes: a plurality of gas screw compressors 28 in communication with the external submerged arc furnace gas header 1;
the gas cushion assembly 3 includes: a gas buffer tank 33 in communication with the gas screw compressor 28;
the gas heating component 5 is divided into a gas electric heater 53 and a smoke heat exchanger 55, and the gas electric heater 53 and the smoke heat exchanger 55 are communicated with the gas buffer tank 33 through connecting pipelines;
the micro-gas engine unit 4 is provided with a plurality of micro-gas engines 41, the gas input ends of which are communicated with the gas electric heater 53 and the smoke heat exchanger 55, and the high-temperature smoke output ends of the micro-gas engines 41 are communicated with the smoke heat exchanger 55 and a plurality of drying rotary kilns 61 in the drying rotary kiln unit 6 through connecting pipelines;
the coal gas generated by the submerged arc furnace is pressurized through the coal gas screw compressor unit 2 and then is sent into the coal gas buffer assembly 3 for dehydration and pressure stabilization, the dehydrated and pressure-stabilized coal gas is heated through the coal gas heating assembly 5, the generated electric energy is combined with a power grid for a user to use, the generated high-temperature flue gas generated by power generation is sent to the flue gas heat exchanger 55 to provide a heat source for heating the coal gas, and then is sent to the drying rotary kiln unit 6 to provide heat energy for drying materials, so that the utilization rate of the submerged arc furnace coal gas is effectively improved, and the waste of coal gas energy is avoided;
the gas screw compressors 28 are conventional equipment, the number of the gas screw compressors is two, the input end of each gas screw compressor 28 is communicated with the submerged arc furnace gas main pipe 1 through a first input branch pipe 21, the output end of each gas screw compressor is communicated with the input end of a corresponding gas buffer tank 33 through a first output branch pipe 211, a first communication branch pipe 213 is arranged between the two first output branch pipes 211, so that the gas pressure from the submerged arc furnace is increased to 0.6-0.9 MPa through the gas screw compressors 28, and the gas pressure entering the micro-gas engine 41 is ensured to meet the requirements;
an inlet explosion-proof electric butterfly valve 23, a manhole 24 on which a purge head is arranged, an inlet explosion-proof electric blind plate valve 25, an inlet pressure sensor 26 and an inlet temperature sensor 27 are sequentially arranged on the first input branch pipe 21; the first output branch pipe 211 is sequentially provided with an outlet pressure sensor 29, an outlet temperature sensor 210 and two outlet explosion-proof electric stop valves 212 which are arranged in series; a plurality of purge and blow-off pipes 22 are arranged on the first input branch pipe 21 and the first output branch pipe 211; so as to monitor the pressure and temperature of the gas entering and exiting the gas screw compressor 28 and ensure the safe operation of the pipeline; an explosion-proof electric cut-off valve 214 and a purge blow-off pipe are arranged on the first communication branch pipe 213, as shown in fig. 2, so as to simultaneously convey coal gas to the two coal gas buffer tanks 33 and ensure the operation safety of the pipeline;
the gas buffer tanks 33 are conventional equipment, and are arranged in parallel, the input end of each gas buffer tank 33 is connected with the first communication branch pipe 213 through the second input branch pipe 31, the output end of each gas buffer tank 33 is connected with the second output branch pipe 37, the second output branch pipes 37 on the two gas buffer tanks 33 are respectively connected with the two ends of the second communication branch pipe 310, the second communication branch pipe 310 is communicated with the gas heating assembly 5 through the gas heating conveying pipe 7 so as to balance high-frequency fluctuation of the pressure and flow of the gas through the gas buffer tanks 33, and gas condensate water in the gas is separated through gravity; the second input branch pipe 31 is sequentially provided with a purging and diffusing pipe and a gas inlet cut-off valve 32, the second output branch pipe 37 is sequentially provided with a gas outlet manual cut-off valve 35, a purging and diffusing pipe and an explosion-proof electric cut-off valve 36, the bottom of the gas buffer tank 33 is provided with a drain pipe 39 provided with an explosion-proof electric drain cut-off valve 38, and the top is provided with a purging and diffusing pipe and a safety valve 34, as shown in fig. 3, so that the operation safety of the pipeline is ensured;
the input end of the gas heating conveying pipe 7 is connected with the second communicating branch pipe 310, the output end is respectively connected with the input ends of the gas electric heater 53 and the flue gas heat exchanger 55 through the third input branch pipe 51, as shown in fig. 4, a purging and diffusing pipe, an explosion-proof electric stop valve 71, a rotameter 72, a manual stop valve 73 and an outlet pipe temperature sensor 76 are sequentially arranged on the gas heating conveying pipe 7, a bypass pipe 75 is arranged between the second communicating branch pipe 310 and the gas heating conveying pipe 7 behind the manual stop valve 73, and a purging and diffusing pipe and a bypass stop valve 74 are sequentially arranged on the bypass pipe 75, as shown in fig. 9, so that gas is safely and stably conveyed to the gas heating assembly 5 through the gas heating conveying pipe 7;
the gas electric heater 53 is a conventional explosion-proof gas electric heater, the input end of the gas electric heater is connected with the gas heating conveying pipe 7 through a third input branch pipe 51, the output end of the gas electric heater is connected with the micro-gas machine gas conveying pipe 42 through a third output branch pipe 56, as shown in fig. 4 and 1, a purge and release pipe and an explosion-proof electric stop valve 52 are sequentially arranged on the third input branch pipe 51 in front of the input end of the gas electric heater 53, a purge and release pipe and an explosion-proof electric stop valve are sequentially arranged on the third output branch pipe 56 behind the output end of the gas electric heater 53, so that the gas before entering the micro-gas machine 41 is heated through the gas electric heater 53, condensed water in the gas is vaporized, and liquid water drops are prevented from entering the micro-gas machine 41;
the flue gas heat exchanger 55 is a conventional gas-flue gas heat pipe heat exchanger, the input end of the flue gas heat exchanger 55 is connected with the third input branch pipe 51, the output end of the flue gas heat exchanger is connected with the micro-gas engine gas conveying pipe 42 through the third output branch pipe 56, the high-temperature flue gas input end of the flue gas heat exchanger 55 is connected with the flue gas discharge port of the micro-gas engine 41 through the flue gas input pipe 54, the output end of the flue gas heat exchanger is communicated with the drying rotary kiln unit 6 through the flue gas output pipe 58, the third input branch pipe 51 in front of the input end is sequentially provided with a blowing-off pipe and an explosion-proof electric stop valve, the third output branch pipe 56 in rear of the output end is sequentially provided with a temperature sensor 57, an explosion-proof electric stop valve and a blowing-off pipe, and the flue gas output pipe 58 is further connected with an accident-off pipe on which is provided with the flue gas accident-discharging valve of the micro-gas engine, as shown in fig. 1 and 4, so that the high-temperature flue gas generated by the micro-gas engine 41 can be used for heating the gas, and the utilization rate of the high-temperature flue gas is improved;
the micro-gas turbine 41 is a conventional micro-gas turbine, the gas input end of the micro-gas turbine is connected with the micro-gas turbine gas conveying pipe 42 through a fourth input branch pipe 46, as shown in fig. 1 and 5, the high-temperature flue gas output end is connected with a flue gas input pipe 54 through a fourth output branch pipe 412, as shown in fig. 6 and 5, an air inlet pressure sensor 43, an air inlet temperature sensor 44, a manual air inlet shutoff valve 45, a purge and release pipe, a rotor flowmeter 47, an explosion-proof electric shutoff valve 48 and an explosion-proof electric air inlet main valve 410 of the micro-gas turbine are sequentially arranged on the fourth input branch pipe 46, a blowdown purge valve 411 and an on-duty explosion-proof electric butterfly valve 49 are further arranged at the tail end of the fourth input branch pipe 46, a micro-gas turbine flue gas outlet electric butterfly valve 413 is arranged on the fourth output branch pipe 412, as shown in fig. 5 and 6, so that the gas of the submerged-arc furnace is combusted through the micro-gas turbine 41, and then the gas energy is converted into electric energy, and then the electric energy is used in a power grid for power supply in a factory, and the power grid is effectively utilized for power generation;
the drying rotary kiln 61 is set as conventional equipment, a high-temperature flue gas input end of the drying rotary kiln 61 is connected with a flue gas output pipe 58 through a fifth input branch pipe 62, an exhaust gas discharge port is communicated with a rotary kiln flue gas discharge control device, and a rotary kiln gas burner input end of the drying rotary kiln 61 is connected with a submerged arc furnace gas main pipe 1 through a sixth input branch pipe 611, so that when the micro-combustion engine 41 normally operates, high-temperature flue gas generated by the micro-combustion engine 41 is sent to the drying rotary kiln 61 through the flue gas output pipe 58 to provide a heat source for drying materials, and when the micro-combustion engine 41 fails or high-temperature flue gas is insufficient due to other reasons, gas from the submerged arc furnace gas main pipe 1 is burned through a rotary kiln gas burner carried by the drying rotary kiln 61 to provide a heat source for drying materials, and the high-temperature flue gas of the micro-combustion engine 41 is effectively utilized;
an electric regulating butterfly valve 63, a manual butterfly valve 64 and a flue gas temperature sensor 65 are sequentially arranged on the fifth input branch pipe 62, as shown in fig. 7, a plurality of explosion-proof electric butterfly valves 68, explosion-proof electric gate valves 69, a plurality of manholes 610 with purging heads, a temperature sensor 67 and a pressure sensor 66 are sequentially arranged on the sixth input branch pipe 611, and a plurality of purging and diffusing pipes are arranged between the explosion-proof electric butterfly valves 68 and the explosion-proof electric gate valves 69, as shown in fig. 8, so that the gas supply safety is ensured.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (10)
1. The gas grading utilization system of the fully-closed submerged arc furnace is characterized by comprising a gas screw compressor unit, a gas buffer component, a gas heating component, a micro-combustion unit, a drying rotary kiln unit and a connecting pipeline;
the gas screw compressor unit comprises a plurality of gas screw compressors communicated with an external submerged arc furnace gas main pipe;
the three-speaking two-beat gas buffer assembly comprises a gas buffer tank communicated with the corresponding gas screw compressor;
the gas heating assembly is divided into a gas electric heater and a smoke heat exchanger, and the gas electric heater and the smoke heat exchanger are communicated with the gas buffer tank through connecting pipelines;
the micro-gas engine unit is provided with a plurality of micro-gas engines, the gas input end of which is communicated with the gas electric heater and the smoke heat exchanger, and the high-temperature smoke output end of the micro-gas engines is communicated with the smoke heat exchanger and a plurality of drying rotary kilns in the drying rotary kiln unit through connecting pipelines.
2. The fully-closed submerged arc furnace gas grading utilization system according to claim 1, wherein the number of the gas screw compressors is at least two, the input end of each gas screw compressor is communicated with a submerged arc furnace gas main pipe through a first input branch pipe, the output end of each gas screw compressor is communicated with the input end of a corresponding gas buffer tank through a first output branch pipe, and a first communication branch pipe for communicating the two gas screw compressors is arranged between the two first output branch pipes.
3. The system for classifying and utilizing the coal gas of the fully-closed submerged arc furnace according to claim 2, wherein an inlet explosion-proof electric butterfly valve, a manhole on which a purge head is arranged, an inlet explosion-proof electric blind valve, an inlet pressure sensor and an inlet temperature sensor are sequentially arranged on the first input branch pipe, an outlet pressure sensor, an outlet temperature sensor and two outlet explosion-proof electric stop valves which are arranged in series are sequentially arranged on the first output branch pipe, and a plurality of purge and diffusion pipes are arranged on the first input branch pipe and the first output branch pipe;
and the first communication branch pipe is provided with an explosion-proof electric cut-off valve and a purging diffusing pipe.
4. The system for classifying and utilizing the coal gas of the fully-closed submerged arc furnace according to claim 1, wherein the number of the coal gas buffer tanks is at least two, the input end of each coal gas buffer tank is connected with the first communicating branch pipe through the second input branch pipe, the output end of each coal gas buffer tank is connected with the second output branch pipe, the second output branch pipes on the two coal gas buffer tanks are respectively connected with the two ends of the second communicating branch pipes, and the second communicating branch pipes are communicated with the coal gas heating assembly through the coal gas heating conveying pipe.
5. The system for classifying and utilizing the coal gas of the totally-enclosed submerged arc furnace according to claim 4, wherein the second input branch pipe is sequentially provided with a purging and diffusing pipe and a coal gas inlet cut-off valve, the second output branch pipe is sequentially provided with a coal gas outlet manual cut-off valve, a purging and diffusing pipe and an explosion-proof electric cut-off valve, the bottom of the coal gas buffer tank is provided with a coal gas buffer tank bottom drain pipe on which the explosion-proof electric drain cut-off valve is arranged, and the top of the coal gas buffer tank is provided with a purging and diffusing pipe and a coal gas buffer tank safety valve.
6. The system for classifying and utilizing the coal gas of the fully-closed submerged arc furnace according to claim 4, wherein the input end of the coal gas heating conveying pipe is connected with the second communicating branch pipe, the output end of the coal gas heating conveying pipe is respectively connected with the input ends of the coal gas electric heater and the smoke heat exchanger through the third communicating branch pipe, the coal gas heating conveying pipe is sequentially provided with a purging and diffusing pipe, an explosion-proof electric stop valve, a rotameter, a manual stop valve and an outlet pipe temperature sensor, a bypass pipe is arranged between the second communicating branch pipe and the coal gas heating conveying pipe behind the manual stop valve, and the bypass pipe is sequentially provided with the purging and diffusing pipe and the bypass stop valve.
7. The system for classifying and utilizing the coal gas of the fully-closed submerged arc furnace according to claim 1, wherein the input end of the coal gas electric heater is connected with the coal gas heating conveying pipe through a third input branch pipe, the output end of the coal gas electric heater is connected with the micro-gas engine coal gas conveying pipe through a third output branch pipe, a purging and diffusing pipe and an explosion-proof electric stop valve are sequentially arranged on the third input branch pipe in front of the input end of the coal gas electric heater, and a purging and diffusing pipe and an explosion-proof electric stop valve are sequentially arranged on the third output branch pipe behind the output end of the coal gas electric heater.
8. The fully-closed submerged arc furnace gas grading utilization system according to claim 1, wherein the gas input end of the gas heat exchanger is connected with a third input branch pipe, the gas output end is connected with a micro-gas engine gas conveying pipe through a third output branch pipe, the high-temperature gas input end of the gas heat exchanger is connected with a micro-gas engine gas discharge port through a gas input pipe, the output end is communicated with a drying rotary kiln unit through a gas output pipe, a purging diffusion pipe and an explosion-proof electric stop valve are sequentially arranged on the third input branch pipe in front of the gas input end, a heat pipe heat exchanger outlet temperature sensor, an explosion-proof electric stop valve and a purging diffusion pipe are sequentially arranged on a third output branch pipe behind the gas output end, and the gas output pipe is further connected with an accident diffusion pipe on which the micro-gas engine gas accident discharge valve is arranged.
9. The fully-closed submerged arc furnace gas grading utilization system according to claim 1, wherein the gas input end of the micro-combustion engine is connected with a micro-combustion engine gas conveying pipe through a fourth input branch pipe, the high-temperature flue gas output end is connected with a flue gas input pipe through a fourth output branch pipe, an air inlet pressure sensor, an air inlet temperature sensor, a manual air inlet cut-off valve, a purging and diffusing pipe, a rotameter, an explosion-proof electric cut-off valve and an explosion-proof electric air inlet main valve of the micro-combustion engine are sequentially arranged on the fourth input branch pipe, a pollution discharge purging valve and an on-duty explosion-proof electric butterfly valve are further arranged at the tail end of the fourth input branch pipe, and an electric butterfly valve of a flue gas outlet of the micro-combustion engine is arranged on the fourth output branch pipe.
10. The fully-closed submerged arc furnace gas grading utilization system according to claim 1, wherein the high-temperature flue gas input end of the drying rotary kiln is connected with a flue gas output pipe through a fifth input branch pipe, the exhaust gas discharge port is communicated with a rotary kiln flue gas discharge control device, and the rotary kiln gas burner input end of the drying rotary kiln is connected with a submerged arc furnace gas main pipe through a sixth input branch pipe;
an electric regulating butterfly valve, a manual butterfly valve and a smoke temperature sensor are sequentially arranged on the fifth input branch pipe, a plurality of explosion-proof electric butterfly valves, explosion-proof electric gate valves, a plurality of manholes with purging heads, a temperature sensor and a pressure sensor are sequentially arranged on the sixth input branch pipe, and a plurality of purging and diffusing pipes are arranged between the explosion-proof electric butterfly valves and the explosion-proof electric gate valves.
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| CN202311626564.1A CN117703595A (en) | 2023-11-30 | 2023-11-30 | Totally-enclosed submerged arc furnace gas grading utilization system |
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| CN202311626564.1A CN117703595A (en) | 2023-11-30 | 2023-11-30 | Totally-enclosed submerged arc furnace gas grading utilization system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024134060A1 (en) * | 2023-12-07 | 2025-06-12 | Borgwarner Inc. | Fuel supply system for a power generation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102024134060A1 (en) * | 2023-12-07 | 2025-06-12 | Borgwarner Inc. | Fuel supply system for a power generation system |
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