CN115159526A - Energy-saving and environment-friendly production system for industrial silicon - Google Patents
Energy-saving and environment-friendly production system for industrial silicon Download PDFInfo
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- CN115159526A CN115159526A CN202210777174.3A CN202210777174A CN115159526A CN 115159526 A CN115159526 A CN 115159526A CN 202210777174 A CN202210777174 A CN 202210777174A CN 115159526 A CN115159526 A CN 115159526A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D9/00—Cooling of furnaces or of charges therein
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Abstract
The invention provides an energy-saving and environment-friendly production system of industrial silicon, and relates to the field of industrial silicon production. The energy-saving and environment-friendly production system of the industrial silicon comprises an electric furnace, a water cooling module, a non-magnetic electrode insulation module and a smoke collecting hood module; the water cooling module comprises a clean water tank, a circulating water tank, a sedimentation tank, a circulating water pump station, a cold water pipe, a cooling water inlet pipe and a cooling water return pipe, wherein the clean water tank is used for supplementing fresh water, the circulating water tank is connected with the circulating water pump station through the cold water pipe, the circulating water pump station is connected with the electric furnace through the cooling water inlet pipe, a top pan of the electric furnace is connected with the sedimentation tank through the cooling water return pipe, and the sedimentation tank is connected with the circulating water tank; the non-magnetic electrode insulation module is used for generating high temperature so as to heat and melt furnace burden; the smoke collecting hood module comprises a centrifugal fan, a flue, an air cooling air pipe, a bipolar vortex dust collector, a bag type dust collector and a purification submodule. The invention has the characteristics of energy conservation and environmental protection, is beneficial to reducing energy consumption and production cost, and improves the economic benefit of enterprises.
Description
Technical Field
The invention relates to the field of industrial silicon production, in particular to an energy-saving and environment-friendly production system for industrial silicon.
Background
Industrial silicon production is a high energy consumption industry, generally, 13500KWh-14000KWh electricity is consumed per ton of industrial silicon on average, and more than 1.4 hundred million KWh electricity is required for 1 million tons of industrial silicon produced each year, which is huge energy consumption. The inventor of the present application has engaged in the field of industrial silicon production for a long time and continuously studied the problem of high energy consumption in the industrial silicon production process in order to solve or improve the high energy consumption of industrial silicon production. Regarding the problem of high energy consumption, the inventors of the present application mainly consider from two aspects when studying: process aspects and equipment aspects. In the case of industrial silicon production processes, the process change necessarily leads to the modification or replacement of existing equipment, which is a huge investment for enterprises; at the same time, it takes time and effort to train the worker. And for solving or improving the problem of high energy consumption in the aspect of equipment, the production relieving link can be optimized and modified on the basis of basically maintaining the existing process, the modification cost is low, time and energy are not needed to be spent for training workers, the economic value is better, and the good development of enterprises is facilitated.
Disclosure of Invention
The invention aims to provide an energy-saving and environment-friendly production system of industrial silicon, which has the characteristics of energy conservation and environment friendliness, is beneficial to reducing energy consumption and production cost and improving economic benefits of enterprises.
Embodiments of the invention may be implemented as follows:
the embodiment of the invention provides an energy-saving and environment-friendly production system of industrial silicon, which comprises an electric furnace, a water cooling module, a non-magnetic electrode insulation module and a smoke collecting hood module;
the water cooling module comprises a clean water tank, a circulating water tank, a sedimentation tank, a circulating water pump station, a cold water pipe, a cooling water inlet pipe and a cooling water return pipe, wherein the clean water tank is used for supplementing fresh water, the circulating water tank is connected with the circulating water pump station through the cold water pipe, the circulating water pump station is connected with the electric furnace through the cooling water inlet pipe, a top pan of the electric furnace is connected with the sedimentation tank through the cooling water return pipe, and the sedimentation tank is connected with the circulating water tank;
the non-magnetic electrode insulation module is used for generating high temperature to heat and melt furnace burden, the non-magnetic electrode insulation module comprises a three-phase electrode lower holder, a copper tile protective sleeve and an electrode clamping ring which are all made of magnetic isolation materials, and a smoke hood of the energy-saving and environment-friendly production system is made of the magnetic isolation materials;
the collection petticoat pipe module includes centrifugal fan, flue, air cooling tuber pipe, bipolar vortex dust remover, bag collector and purification submodule piece, centrifugal fan is used for drawing the flue gas in by the electric stove, and follows the flue gets into the air cooling tuber pipe, the air cooling tuber pipe is used for right the flue gas cools off, and will the flue gas guide extremely doublestage vortex dust remover, doublestage vortex dust remover be used for with coarse grain and mars in the flue gas separate, bag collector is used for collecting coarse grain dust, it is right warp to purify the submodule piece be used for bag collector's gas carries out purification treatment to discharge after purification treatment.
Further, in an optional embodiment, the top pan of the electric furnace is higher than the position of the sedimentation tank, the cooling water return pipe has a first pipe orifice and a second pipe orifice, the first pipe orifice of the cooling water return pipe is connected with the top pan of the circuit, the second of the cooling water return pipe is connected with the sedimentation tank, the position of the first pipe orifice of the cooling water return pipe is higher than the position of the second pipe orifice of the cooling water return pipe, and the height of the pipe body of the cooling water return pipe is smaller than the position of the first pipe orifice.
That is to say, can make cold water follow the day pot of electric stove along cooling water wet return entering sedimentation tank through the action of gravity, and need not to provide extra power, play more energy-conserving effect.
Further, in an alternative embodiment, the cooling water return pipe includes a plurality of serpentine segments, each serpentine segment being located at a same height, and the height of the serpentine segments gradually decreases in a direction from the first nozzle to the second nozzle;
wherein each serpentine section comprises a plurality of transversely arranged serpentine portions reciprocating back and forth, and a ventilation gap is arranged between any two serpentine portions.
That is, the flowing time of the return water in the cooling water return pipe can be increased, so that the return water can be cooled for a longer time, namely, the temperature of the return water entering the sedimentation tank is lower, and a better cooling effect can be achieved in the next circulation.
Further, in an optional embodiment, the cooling water return pipe comprises a cooling water return main pipe and a cooling water return branch pipe;
the cooling water return main pipe is provided with a main pipe water valve, and two pipe orifices of the cooling water return main pipe are respectively connected with the top pan of the electric furnace and the sedimentation tank;
the cooling water return branch pipe is provided with a branch pipe water valve, the two ends of the cooling water return branch pipe are respectively connected with the cooling water return main pipe and the sedimentation tank, and at least part of pipe body of the cooling water return branch pipe is arranged in the water purification tank so as to pass through the water purification tank, and the water in the cooling water return branch pipe is cooled.
In the embodiment of the invention, the cooling water return branch pipe is arranged in the water purification tank, and the return water can be cooled through the water purification tank.
Further, in an optional embodiment, the water cooling module further comprises a sensor submodule and a control system, the sensor submodule is used for acquiring the water storage capacity in the circulating water pond, and the control system controls the water inlet of the circulating water pump station and the water purification pond according to the water storage capacity in the circulating water pond, so that the water quantity in the circulating water pond is not less than the preset water quantity.
Further, in an optional embodiment, the control system is electrically connected to the main water valve and the branch water valve, and is configured to control the main water valve and the branch water valve to open or close;
the control system is further configured to: if the water storage capacity in the circulating water tank meets the preset water quantity requirement, the branch pipe water valve is controlled to be opened, so that at least part of water in the cooling water return main pipe enters the cooling water return branch pipe, and the water entering the cooling water return branch pipe can pass through the water cooling in the water purifying tank and then enters the sedimentation tank.
Further, in an alternative embodiment, the settling tank is located lower than the clean water tank, and the return cooling water branch pipe is disposed around an inner wall or an outer wall of the clean water tank.
Further, in an optional embodiment, the smoke collecting hood module further includes a gas detection submodule electrically connected to the control system, the gas detection submodule is disposed behind the purification submodule and is used for performing gas detection on the gas purified by the purification submodule, the control system is further configured to determine whether the gas meets the emission requirement, and if the gas does not meet the emission requirement, the gas is reintroduced into the gas purification submodule to be purified again until the gas meets the emission requirement.
Further, in an optional embodiment, the energy-saving and environment-friendly production system has a plurality of gas discharge holes, the number of the purification sub-modules includes a plurality of gas discharge holes, the gas detection sub-modules correspond to the purification sub-modules one by one, and outlets of the bag type dust collectors are respectively connected to inlets of the plurality of purification sub-modules and are respectively provided with a gas valve.
Further, in an optional embodiment, the control system is further configured to close a gas valve that communicates between the gas purification sub-module and the bag filter if the gas detection sub-module detects that none of the gases meets the emission requirement within a first preset time range, and control the system to shut down if at least one gas detection sub-module exists within a second preset time range after the gas valve is closed and none of the detected gases meets the requirement.
When the detected gas does not meet the requirements, the fault of the smoke collecting hood module or other parts is indicated, so that the pollutant content of the gas is increased or the pollutant treatment is invalid, and the machine needs to be stopped to detect specific faults.
The energy-saving and environment-friendly production system of industrial silicon provided by the embodiment of the invention has the following beneficial effects:
for the energy-saving and environment-friendly production system of the industrial silicon, the water cooling module, the non-magnetic electrode insulation module and the smoke collecting hood module are mainly subjected to energy-saving and environment-friendly improvement, so that the heat efficiency is improved, the heat loss is reduced, the utilization efficiency of water resources is improved, and the pollutant emission is reduced.
For the water cooling module, the clear water tank is used for supplementing cold water to circulating water cooling; the circulating water tank is used for storing cold water for circulation, and the part of the cold water comprises cold water from the clean water tank and water circulated from the sedimentation tank. And the circulating water pump station is used for pumping the cold water in the circulating water pool to the electric furnace through the cooling water inlet pipe to participate in cooling the electric furnace. And the water in the electric furnace cupola is guided back to the sedimentation tank through the cooling water return pipe, and enters the circulating water tank after being treated by the sedimentation tank, so that the cooling water can be recycled. In the embodiment of the invention, compared with the prior art, the original high-pressure water cooling and returning pipelines are removed, the top pan of the furnace is dismantled, the water supply mode of the equipment such as the framework, the distribution equipment, the transformer and the like is changed into the water pressurization of the circulating water tank, the water is returned by a main water inlet pipe and pressurized to the framework of the furnace body, the cooling water of the keel is circulated to the top pan of the furnace, the cooling water of the distribution equipment is directly taken from the framework of the furnace body, the cooling water of the distribution equipment and the cooling return water of the transformer are returned to the top pan, all the cooling water naturally flows into the cooling tank through high-low pressure difference after being collected in the top pan, and is recycled after being cooled and deposited. The embodiment of the invention reduces structural components, has simpler structure and more convenient operation and assembly, and can play a good role in utilizing cold water and saving energy.
For the non-magnetic electrode insulation module, the magnetic isolation material is mainly adopted, so that the hysteresis loss and the eddy current loss generated by current induction are reduced, and the energy conservation is realized. In the embodiment of the invention, the lower holder of the three-phase electrode, the copper tile protective sleeve and the electrode clamping ring are made of magnetic isolation materials, and the smoke hood is also made of the magnetic isolation materials. Of course, the present invention is not limited to this, and other portions may be made of a magnetic shielding material.
For the smoke collecting hood module, the tail gas of a production system is mainly treated, and pollutant emission is avoided. In the embodiment of the invention, the flue gas is guided into the flue by the centrifugal fan and sequentially enters the air cooling air pipe, the flue gas is subjected to dust removal treatment by the bipolar vortex dust remover and the bag type dust remover, and the flue gas subjected to dust removal is subjected to purification treatment by the purification submodule, so that the pollution of the exhaust gas is reduced or avoided.
In conclusion, the energy-saving and environment-friendly production system for industrial silicon provided by the embodiment of the invention has the characteristics of energy conservation and environment protection, is beneficial to reducing energy consumption and production cost, and improves the economic benefit of enterprises.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below. It is appreciated that the following drawings depict only certain embodiments of the invention and are therefore not to be considered limiting of its scope. For a person skilled in the art, it is possible to derive other relevant figures from these figures without inventive effort.
FIG. 1 is a schematic structural diagram of an energy-saving and environment-friendly production system for industrial silicon according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a water cooling module according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a smoke collecting hood module according to an embodiment of the present invention.
Icon: 110-electric furnace; 120-a water cooling module; 130-a non-magnetic electrode insulation module; 140-fume collecting hood module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
The following detailed description of embodiments of the invention refers to the accompanying drawings.
Referring to fig. 1, the embodiment provides an energy-saving and environment-friendly production system for industrial silicon, which has the characteristics of energy saving and environment protection, and is beneficial to reducing energy consumption and production cost and improving economic benefits of enterprises.
In the embodiment of the invention, the energy-saving and environment-friendly production system of the industrial silicon comprises an electric furnace 110, a water cooling module 120, a non-magnetic electrode insulation module 130 and a smoke collection hood module 140.
Referring to fig. 2, the water cooling module 120 includes a clean water reservoir for supplying fresh water, a circulating water reservoir, a sedimentation reservoir, a circulating water pump station, a cold water pipe, a cooling water inlet pipe, and a cooling water return pipe, the circulating water reservoir is connected to the circulating water pump station through the cold water pipe, the circulating water pump station is connected to the electric furnace 110 through the cooling water inlet pipe, the top pan of the electric furnace 110 is connected to the sedimentation reservoir through the cooling water return pipe, and the sedimentation reservoir is connected to the circulating water reservoir.
For the water cooling module, the clear water tank is used for supplementing cold water to circulating water cooling; the circulating water tank is used for storing cold water for circulation, and the part of the cold water comprises cold water from the clean water tank and water circulated from the sedimentation tank. And the circulating water pump station is used for pumping the cold water in the circulating water pool to the electric furnace through the cooling water inlet pipe to participate in cooling the electric furnace. And the water in the electric furnace cupola is guided back to the sedimentation tank through the cooling water return pipe, and enters the circulating water tank after being treated by the sedimentation tank, so that the cooling water can be recycled. In the embodiment of the invention, compared with the prior art, the original high-pressure water cooling and returning pipelines are removed, the top pan of the furnace is dismantled, the water supply mode of the equipment such as the framework, the distribution equipment, the transformer and the like is changed into the water pressurization of the circulating water tank, the water is returned by a main water inlet pipe and pressurized to the framework of the furnace body, the cooling water of the keel is circulated to the top pan of the furnace, the cooling water of the distribution equipment is directly taken from the framework of the furnace body, the cooling water of the distribution equipment and the cooling return water of the transformer are returned to the top pan, all the cooling water naturally flows into the cooling tank through high-low pressure difference after being collected in the top pan, and is recycled after being cooled and deposited. The embodiment of the invention reduces structural components, has simpler structure and more convenient operation and assembly, and can play a good role in utilizing cold water and saving energy.
Further, the position that the day pot of electric stove 110 is higher than the sedimentation tank, and the cooling water wet return has first mouth of pipe and second mouth of pipe, and the first mouth of pipe of cooling water wet return is connected with the day pot of circuit, and the second and the sedimentation tank of cooling water wet return are connected, and the position of the first mouth of pipe of cooling water wet return is higher than the second mouth of pipe position of cooling water wet return, and the body height of cooling water wet return is less than the position of first mouth of pipe. That is to say, can make cold water follow the sky pot of electric stove along cooling water wet return entering sedimentation tank through the action of gravity, and need not to provide extra power, play more energy-conserving effect.
In an alternative embodiment, the cooling water return pipe comprises a plurality of serpentine segments, each serpentine segment being located at the same height, and the height of the serpentine segments gradually decreases in a direction from the first nozzle to the second nozzle; wherein, each serpentine section comprises a plurality of transversely arranged serpentine parts reciprocating back and forth, and a ventilation gap is arranged between any two serpentine parts. That is, the flowing time of the return water in the cooling water return pipe can be increased, so that the return water can be cooled for a longer time, namely, the temperature of the return water entering the sedimentation tank is lower, and a better cooling effect can be achieved in the next circulation.
In an optional embodiment, the cooling water return pipe comprises a cooling water return main pipe and a cooling water return branch pipe; the cooling water return main pipe is provided with a main pipe water valve, and two pipe orifices of the cooling water return main pipe are respectively connected with the top pan and the sedimentation tank of the electric furnace 110; the cooling water return branch pipe is provided with a branch pipe water valve, two ends of the cooling water return branch pipe are respectively connected with the cooling water return main pipe and the sedimentation tank, and at least part of pipe body of the cooling water return branch pipe is arranged in the water purification tank so as to cool the cooling water in the cooling water return branch pipe through the water purification tank. In the embodiment of the invention, the cooling water return branch pipe is arranged in the water purification tank, and the return water can be cooled through the water purification tank.
In an optional embodiment, the water cooling module 120 further includes a sensor submodule and a control system, the sensor submodule is configured to obtain a water storage amount in the circulating water tank, and the control system controls the water intake of the circulating water pump station and the purified water tank according to the water storage amount in the circulating water tank, so that the water amount in the circulating water tank is not less than a preset water amount.
Furthermore, the control system is electrically connected with the main pipe water valve and the branch pipe water valve and is used for controlling the main pipe water valve and the branch pipe water valve to be opened or closed; the control system is further configured to: if the water storage capacity in the circulating water tank meets the preset water quantity requirement, the branch pipe water valve is controlled to be opened, so that at least part of water in the cooling water return main pipe enters the cooling water return branch pipe, and the water entering the cooling water return branch pipe can be cooled by the water in the water purifying tank and then enters the sedimentation tank.
Alternatively, in the present embodiment, the sedimentation tank is located lower than the clean water tank, and the return-cooling-water branch pipe is disposed around the inner wall or the outer wall of the clean water tank.
The non-magnetic electrode insulation module 130 is used for generating high temperature to heat and melt furnace burden, the non-magnetic electrode insulation module 130 comprises a three-phase electrode lower holder, a copper tile protective sleeve and an electrode clamping ring which are all made of magnetic isolation materials, and a smoke hood of the energy-saving and environment-friendly production system is made of the magnetic isolation materials.
For the non-magnetic electrode insulation module, the magnetic isolation material is mainly adopted, so that the hysteresis loss and the eddy current loss generated by current induction are reduced, and the energy conservation is realized. In the embodiment of the invention, the lower holder of the three-phase electrode, the copper tile protective sleeve and the electrode clamping ring are made of magnetic isolation materials, and the smoke hood is also made of the magnetic isolation materials. Of course, the present invention is not limited to this, and other portions may be made of a magnetic shielding material.
It should be pointed out that the electrode system is the core system of smelting, the electric furnace silicon smelting uses silicon ore, petroleum coke, cleaned coal and waste firewood as main raw materials, three-phase alternating current is used as a power supply, the charging is heated and melted by using the high temperature of electric arc generated between a graphite electrode and mixed charging by current, the temperature of the smelting electric furnace depends on the arc discharge quality of a copper shoe in the electrode, and under the condition that the power supply voltage is stable and unchanged, the arc discharge quality is directly influenced by the insulation quality of a water-cooled cable, a conductive copper pipe, a flue, a framework, electrode lifting, electrode holding, electrode pressure releasing, the copper shoe, a furnace wall and a furnace bottom. The damage of an insulation system in the furnace seriously causes electric leakage and arc striking, which not only seriously affects the quality of electric arc, causes that short net work cannot be transmitted in time to damage copper tiles, but also endangers the safety of the electric furnace, and directly affects the service life of production equipment and threatens the safety of personnel. In the embodiment of the invention, the comprehensive transformation of the electric furnace framework, the furnace lining, the transformer rectification, the electrode lifting and the smoke hood insulation part is mainly carried out again. The clamping pieces, the hanging pieces, the material pipe smoke hood and other parts around the short net are made of magnetic isolation stainless steel materials, and magnetic field loss around the short net is reduced.
Referring to fig. 3, the smoke collecting hood module 140 includes a centrifugal fan, a flue, an air cooling air duct, a bipolar vortex dust collector, a bag type dust collector, and a purification submodule, wherein the centrifugal fan is used to draw the flue gas out of the electric furnace 110 and enter the air cooling air duct along the flue, the air cooling air duct is used to cool the flue gas and guide the flue gas to the two-stage vortex dust collector, the two-stage vortex dust collector is used to separate coarse particles from sparks in the flue gas, the bag type dust collector is used to collect coarse particles and dust, and the purification submodule is used to purify the gas passing through the bag type dust collector and discharge the purified gas.
For the fume collecting hood module, the tail gas of a production system is mainly treated, and pollutant emission is avoided. In the embodiment of the invention, the flue gas is guided into the flue by the centrifugal fan and sequentially enters the air cooling air pipe, the flue gas is subjected to dust removal treatment by the bipolar vortex dust remover and the bag type dust remover, and the flue gas subjected to dust removal is subjected to purification treatment by the purification submodule, so that the pollution of the exhaust gas is reduced or avoided.
For industrial silicon production, flue gas mainly comes from an electric furnace smelting production process, the main pollutant in the flue gas is silicon dust (also called silicon powder), a large amount of SiO2 and Si gases with strong volatility are generated when industrial silicon is produced in a reduction electric furnace, and the gases are quickly oxidized and condensed with air, and the flue gas mainly comprises the following components: (1) under high-temperature electric heating of an electric furnace molten pool, reducing agent carbon reacts with oxygen to generate gases (also called furnace gas) such as CO, CO2 and the like; (2) at high temperatures of the basic metal charge in the bath, the molten metal is oxidized or directly evaporated into the flue gas (and subsequently cooled to become solid particles). (3) The coke powder and the mineral powder which are not completely combusted are carried out of the molten pool by the gasified and evaporated metal or hot air flow and enter flue gas; (4) under the action of chimney suction, the air (called wild wind) mixed from the periphery of the furnace cover opening is mainly composed of N2 and O2. The mixed flue gas that above-mentioned four aspects generated is collected through the collection petticoat pipe, is carried out the flue gas by the anti-draught fan suction of environmental protection and is handled to the cooling tower, and collection petticoat pipe and the tobacco pipe collection ability in the main stove of reforming transform are reformed transform this time to increase the flue gas and collect the dynamics, promote flue gas treatment efficiency.
In an optional embodiment, the smoke collecting hood module 140 further includes a gas detection submodule electrically connected to the control system, and the gas detection submodule is disposed behind the purification submodule and used for performing gas detection on the gas purified by the purification submodule, and the control system is further configured to determine whether the gas meets the emission requirement, and if the gas does not meet the emission requirement, the gas is reintroduced into the gas purification submodule for secondary purification until the gas meets the emission requirement.
Furthermore, the energy-saving and environment-friendly production system is provided with a plurality of gas discharge holes, the number of the purification submodules comprises a plurality of gas discharge holes, the gas detection submodules correspond to the purification submodules one by one, and the outlets of the bag-type dust collectors are respectively connected with the inlets of the purification submodules and are respectively provided with a gas valve.
In an optional embodiment, the control system is further configured to close a gas valve that communicates the gas purification sub-module and the bag filter if the gas detection sub-module detects that none of the gases meets the emission requirement within a first preset time range, and close the control system if at least one of the gas detection sub-modules exists within a second preset time range after the gas valve is closed and none of the detected gases meets the requirement.
The embodiment of the invention provides an energy-saving and environment-friendly production system of industrial silicon, which comprises the following steps: the energy-saving and environment-friendly improvement is mainly carried out on the water cooling module, the non-magnetic electrode insulation module and the smoke collecting hood module, so that the heat efficiency is improved, the heat loss is reduced, the utilization efficiency of water resources is improved, and the pollutant emission is reduced. For the water cooling module, the clear water tank is used for supplementing cold water to circulating water cooling; the circulating water tank is used for storing cold water for circulation, and the part of the cold water comprises cold water from the clean water tank and water circulated from the sedimentation tank. And the circulating water pump station is used for pumping the cold water in the circulating water pool to the electric furnace through the cooling water inlet pipe to participate in cooling the electric furnace. And the water in the electric furnace cupola is guided back to the sedimentation tank through the cooling water return pipe, and enters the circulating water tank after being treated by the sedimentation tank, so that the cooling water can be recycled. In the embodiment of the invention, compared with the prior art, the original high-pressure water cooling and water return pipelines are removed, the furnace top day pot is removed, the water supply mode of the equipment such as the framework, the distribution equipment, the transformer and the like is changed into the water pressurization of the circulating water tank, the water is returned and pressurized to the furnace body framework by a main water inlet pipe, the keel cooling water is circulated to the furnace top day pot, the distribution equipment cooling water is directly taken from the furnace body framework, the distribution equipment cooling water and the transformer cooling return water are returned to the day pot, all the cooling water is naturally flowed into the cooling tank through high-low pressure difference after being collected in the day pot, and is recycled after cooling and precipitation. The embodiment of the invention reduces structural components, has simpler structure and more convenient operation and assembly, and can play a good role in utilizing cold water and saving energy. For the non-magnetic electrode insulation module, the magnetic isolation material is mainly adopted, so that the hysteresis loss and the eddy current loss generated by current induction are reduced, and the energy conservation is realized. In the embodiment of the invention, the lower holder of the three-phase electrode, the copper tile protective sleeve and the electrode clamping ring are made of magnetic isolation materials, and the smoke hood is also made of the magnetic isolation materials. Of course, the present invention is not limited to this, and other portions may be made of a magnetic shielding material. For the fume collecting hood module, the tail gas of a production system is mainly treated, and pollutant emission is avoided. In the embodiment of the invention, the flue gas is guided into the flue by the centrifugal fan and sequentially enters the air cooling air pipe, the flue gas is subjected to dust removal treatment by the bipolar vortex dust remover and the bag type dust remover, and the flue gas subjected to dust removal is subjected to purification treatment by the purification submodule, so that the pollution of the exhaust gas is reduced or avoided. In conclusion, the energy-saving and environment-friendly production system for industrial silicon provided by the embodiment of the invention has the characteristics of energy conservation and environment protection, is beneficial to reducing energy consumption and production cost, and improves the economic benefit of enterprises.
It should be noted that in the description of the present invention, the terms "upper", "lower", "inner", "outer", "left", "right", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship which the product of the present invention is usually placed in when in use, or the orientation or position relationship which is usually understood by those skilled in the art, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.
It should also be noted that, in the description of the present invention, unless explicitly stated or limited otherwise, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. The energy-saving and environment-friendly production system of the industrial silicon is characterized by comprising an electric furnace, a water cooling module, a non-magnetic electrode insulation module and a smoke collecting hood module;
the water cooling module comprises a clean water tank, a circulating water tank, a sedimentation tank, a circulating water pump station, a cold water pipe, a cooling water inlet pipe and a cooling water return pipe, wherein the clean water tank is used for supplementing fresh water, the circulating water tank is connected with the circulating water pump station through the cold water pipe, the circulating water pump station is connected with the electric furnace through the cooling water inlet pipe, a top pan of the electric furnace is connected with the sedimentation tank through the cooling water return pipe, and the sedimentation tank is connected with the circulating water tank;
the non-magnetic electrode insulation module is used for generating high temperature to heat and melt furnace burden, the non-magnetic electrode insulation module comprises a three-phase electrode lower holder, a copper tile protective sleeve and an electrode clamping ring which are all made of magnetism isolating materials, and a smoke hood of the energy-saving and environment-friendly production system is made of the magnetism isolating materials;
the collection petticoat pipe module includes centrifugal fan, flue, air cooling tuber pipe, bipolar vortex dust remover, bag collector and purification submodule piece, centrifugal fan is used for drawing the flue gas in by the electric stove, and follows the flue gets into the air cooling tuber pipe, the air cooling tuber pipe is used for right the flue gas cools off, and will the flue gas guide extremely doublestage vortex dust remover, doublestage vortex dust remover be used for with coarse grain and mars in the flue gas separate, bag collector is used for collecting coarse grain dust, it is right warp to purify the submodule piece be used for bag collector's gas carries out purification treatment to discharge after purification treatment.
2. The energy-saving and environment-friendly production system of industrial silicon as claimed in claim 1, wherein the top pan of the electric furnace is higher than the position of the sedimentation tank, the cooling water return pipe has a first pipe orifice and a second pipe orifice, the first pipe orifice of the cooling water return pipe is connected with the top pan of the circuit, the second pipe orifice of the cooling water return pipe is connected with the sedimentation tank, the first pipe orifice of the cooling water return pipe is higher than the second pipe orifice of the cooling water return pipe, and the pipe body height of the cooling water return pipe is smaller than the position of the first pipe orifice.
3. The system of claim 2, wherein the cooling water return pipe comprises a plurality of serpentine segments, each serpentine segment being located at a same height, and the serpentine segments gradually decreasing in height as one moves from the first nozzle to the second nozzle;
wherein each serpentine section comprises a plurality of transversely arranged serpentine portions reciprocating back and forth, and a ventilation gap is arranged between any two serpentine portions.
4. The system for energy-saving and environment-friendly production of industrial silicon according to claim 2, wherein the system is characterized in that. The cooling water return pipe comprises a cooling water return main pipe and a cooling water return branch pipe;
the cooling water return main pipe is provided with a main pipe water valve, and two pipe orifices of the cooling water return main pipe are respectively connected with the top pan of the electric furnace and the sedimentation tank;
the cooling water return branch pipe is provided with a branch pipe water valve, the two ends of the cooling water return branch pipe are respectively connected with the cooling water return main pipe and the sedimentation tank, and at least part of pipe body of the cooling water return branch pipe is arranged in the water purification tank so as to pass through the water purification tank, and the water cooling in the cooling water return branch pipe is realized.
5. The energy-saving and environment-friendly production system of industrial silicon according to claim 4, wherein the water cooling module further comprises a sensor submodule and a control system, the sensor submodule is used for acquiring the water storage capacity in the circulating water pond, and the control system controls the water inlet of the circulating water pump station and the water purifying pond according to the water storage capacity in the circulating water pond, so that the water quantity in the circulating water pond is not less than the preset water quantity.
6. The energy-saving and environment-friendly production system of industrial silicon as claimed in claim 5, wherein the control system is electrically connected with the main pipe water valve and the branch pipe water valve and used for controlling the main pipe water valve and the branch pipe water valve to be opened or closed;
the control system is further configured to: if the water storage capacity in the circulating water tank meets the preset water quantity requirement, the branch pipe water valve is controlled to be opened, so that at least part of water in the cooling water return main pipe enters the cooling water return branch pipe, and the water entering the cooling water return branch pipe can pass through the water cooling in the water purifying tank and then enters the sedimentation tank.
7. The system for energy-saving and environment-friendly production of industrial silicon according to claim 6, wherein the sedimentation tank is located lower than the clean water tank, and the return cooling water branch pipe is disposed around an inner wall or an outer wall of the clean water tank.
8. The energy-saving and environment-friendly production system of industrial silicon as claimed in claim 4, wherein the fume collecting hood module further comprises a gas detection submodule electrically connected with the control system, and the gas detection submodule is arranged behind the purification submodule and used for performing gas detection on the gas purified by the purification submodule, the control system is further used for judging whether the gas meets the emission requirement, and if the gas does not meet the emission requirement, the gas is reintroduced into the gas purification submodule for secondary purification until the gas meets the emission requirement.
9. The energy-saving and environment-friendly production system of industrial silicon as claimed in claim 8, wherein the energy-saving and environment-friendly production system has a plurality of gas discharge holes, the number of purification sub-modules includes a plurality of purification sub-modules, the purification sub-modules correspond to the gas discharge holes one by one, the gas detection sub-modules correspond to the purification sub-modules one by one, and the outlets of the bag type dust collectors are respectively connected to the inlets of the purification sub-modules and are respectively provided with a gas valve.
10. The energy-saving and environment-friendly production system of industrial silicon as claimed in claim 9, wherein the control system is further configured to close a gas valve communicating the gas purification sub-module and the bag filter if the gas detection sub-module detects that none of the gases meets the emission requirement within a first preset time range, and to control the system to shut down if at least one gas detection sub-module exists within a second preset time range after the gas valve is closed and none of the detected gases meets the requirement.
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