CN114410888A - Distributed powder spraying system and method - Google Patents
Distributed powder spraying system and method Download PDFInfo
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- CN114410888A CN114410888A CN202111616662.8A CN202111616662A CN114410888A CN 114410888 A CN114410888 A CN 114410888A CN 202111616662 A CN202111616662 A CN 202111616662A CN 114410888 A CN114410888 A CN 114410888A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/527—Charging of the electric furnace
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/54—Processes yielding slags of special composition
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
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Abstract
The invention relates to a distributed powder spraying system and a distributed powder spraying method, belongs to the technical field of powder spraying metallurgy, and solves the problems of small powder storage amount, frequent powder filling and low production efficiency of the conventional powder spraying system. Comprises a feeding working area, a conveying working area, a powder spraying working area and a gas control unit; the feeding working area comprises at least one material storage module, the conveying working area comprises at least one conveying module, and the powder spraying working area comprises at least one powder spraying module; the material storage module, the conveying module and the powder spraying module are not simultaneously one; each storage module is connected with at least one conveying module, each powder spraying module is connected with at least one conveying module, the gas control unit is respectively communicated with the storage module, the conveying module and the powder spraying module, and the gas control unit provides gas for conveying powder for the storage module, the conveying module and the powder spraying module; a valve is arranged between the storage module and the conveying module, and a valve is arranged between the powder spraying module and the conveying module. The powder storage quantity is increased, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of powder spraying metallurgy, in particular to a distributed powder spraying system and a distributed powder spraying method.
Background
Powder spraying metallurgy is an important metallurgical technology, has wide application range, can be used for recarburization, slagging, deoxidation, desulfurization and the like in the steelmaking process of an electric arc furnace, is particularly used for spraying carbon powder to make foamed slag in the smelting of the electric arc furnace, and is the key for improving the steelmaking level of the electric arc furnace and realizing low-consumption and high-productivity electric arc furnace steelmaking.
In recent years, the electric arc furnace technology is rapidly developed by optimizing the existing process and equipment, reducing the cost and developing green new process equipment and technology, and a large number of novel electric arc furnaces represented by continuous charging electric arc furnaces emerge. The novel electric arc furnace technology has the characteristics of large scale and high efficiency, particularly, the key point of carbon powder spraying of the continuous charging electric arc furnace is foaming slag, and for better submerged arc smelting, the powder spraying technology is required to increase the system capacity, increase the process position, ensure the powder spraying continuity and the like.
The conventional powder spraying system is an integrated system with a powder storage function and a powder spraying function, and has the defects of small powder storage amount, frequent powder loading and low production efficiency, and is usually placed on an operation platform nearby an electric arc furnace; when the powder spraying amount demand is increased, the height of the powder spraying system with increased capacity is also increased obviously, more space of a workshop is occupied, the difficulty of installation and maintenance is increased, and therefore the capacity of the powder bin is increased in a limited manner.
Disclosure of Invention
In view of the foregoing analysis, the present invention aims to provide a distributed powder spraying system and method, so as to solve the problems of small powder storage amount, frequent powder loading, difficulty in increasing powder spraying points, and low production efficiency of the existing powder spraying system.
On one hand, the embodiment of the invention provides a distributed powder spraying system, which comprises a feeding working area, a conveying working area, a powder spraying working area and a gas control unit;
the feeding working area comprises at least one material storage module, the conveying working area comprises at least one conveying module, and the powder spraying working area comprises at least one powder spraying module; the material storage module, the conveying module and the powder spraying module are not simultaneously one;
each storage module is connected with at least one conveying module, each powder spraying module is connected with at least one conveying module, the gas control unit is respectively communicated with the storage module, the conveying module and the powder spraying module, and the gas control unit provides gas for conveying powder for the storage module, the conveying module and the powder spraying module;
a valve is arranged between the storage module and the conveying module, and a valve is arranged between the powder spraying module and the conveying module.
Preferably, the storage module comprises a storage device and a sending device, and the storage device is communicated with the sending device.
Preferably, storage device includes hopper and storage silo down, and the powder passes through the hopper gets into the storage silo down, the powder process in the storage silo the sender gets into carry the module.
Preferably, the conveying module comprises a main powder conveying pipeline and an auxiliary gas conveying pipeline, each sending device is communicated with at least one main powder conveying pipeline, and the auxiliary gas conveying pipeline is communicated with the main powder conveying pipeline.
Preferably, a plurality of pressure alarm devices are arranged at different positions on the main powder conveying pipeline, a plurality of auxiliary gas branch pipelines are arranged at different positions on the auxiliary gas conveying pipeline, the auxiliary gas branch pipelines are communicated with different positions of the main powder conveying pipeline, and the pressure alarm devices are arranged between two adjacent auxiliary gas branch pipelines. .
Preferably, the powder spraying module comprises a material receiving device and a powder spraying device, an inlet of the material receiving device is communicated with at least one main powder conveying pipeline, powder in the main powder conveying pipeline enters the powder spraying device after passing through the material receiving device, and a powder outlet of the powder spraying device is communicated with a powder spraying working point.
Preferably, the powder spraying device is provided with 2-5 powder outlets, a confluence device is arranged between the powder outlets and the powder spraying working points, and each powder outlet on the same powder spraying device is communicated with different powder spraying working points through the confluence device.
Preferably, the gas control unit comprises a gas storage device, and the gas storage device is respectively communicated with the sending device, the main powder conveying pipeline, the auxiliary gas conveying pipeline and the powder spraying device.
Preferably, a dust remover and a humidity transmitter are arranged on the storage bin and the receiving device.
Preferably, the distributed powder spraying system further comprises a powder supply expansion area and a powder utilization expansion area, the powder supply expansion area is located at an inlet end of the main powder conveying pipeline, and the powder utilization expansion area is located at an outlet end of the main powder conveying pipeline.
Preferably, the distributed powder spraying system further comprises an automatic control unit, and the automatic control unit is connected with the material storage module, the conveying module and the powder spraying module.
On the other hand, the embodiment of the invention provides a distributed powder spraying method, and by adopting the distributed powder spraying system of the invention, the distributed powder spraying method comprises the following steps: the powder enters the storage bin through the blanking hopper, the powder in the storage bin enters the main powder conveying pipeline through the sending device, the powder from the main powder conveying pipeline enters the receiving device and then enters the powder spraying device, and the powder spraying working point is sprayed with powder.
Compared with the prior art, the invention can realize at least one of the following beneficial effects:
1. the distributed powder spraying system can flexibly combine modules according to a smelting process, the material storage module and the powder spraying module are connected and freely combined through the conveying module, one-to-one and one-to-many arrangement can be realized, and when a plurality of combined modules, material storage modules and powder spraying modules are arranged, many-to-many arrangement can also be realized; the powder storage quantity and the powder spraying quantity are large, continuous powder spraying can be realized, and the powder spraying efficiency is improved; in addition, the distributed powder spraying system is flexible in installation area and is not limited by space.
2. The inlet of each powder spraying module is butted with a plurality of storage modules through the conveying module, so that the storage modules can be switched, and sufficient powder storage of each powder using point is ensured during production; and because the maintenance degree of difficulty of pipeline equipment increases after the increase of the amount of spraying powder, the storage module equipment can be switched when needing maintenance or breaking down, so that the production is smooth.
3. An auxiliary gas conveying pipeline is added, the auxiliary gas conveying pipeline has the functions of blowing assisting, alarming and gradual dredging at the same time, and the maintenance requirements of pipeline abrasion and powder conveying after the powder spraying amount is increased are met.
4. The same powder spraying working point is connected with one or more powder spraying module outlets through a confluence device. Powder can be supplied and sprayed by a plurality of modules at the same powder spraying working point, the powder spraying strength is enhanced, the modules can be switched, when a pipeline has a blockage fault or equipment is maintained, the switching is carried out, and the equipment is convenient to maintain.
5. When the production scale of the iron and steel enterprise is enlarged or the demand of the production flow for the quantity of equipment is increased, the difficulty of expansion is higher on the basis of the conventional powder spraying system, the powder supply expansion area and the powder using expansion area are also arranged, the material storage module and the powder spraying module can be added, the powder storage and powder spraying expansion are convenient, the demand of powder spraying after the production scale is enlarged is met, and the powder spraying system does not need to be increased again or the main body framework of the powder spraying system does not need to be changed.
In the invention, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.
FIG. 1 is a distributed powder injection system of the present invention;
FIG. 2 is a schematic diagram of a material storage module, a delivery module, and a gas control unit;
FIG. 3 is a schematic diagram of the transport module to the powder spray module;
FIG. 4 is a schematic diagram of the powder spraying module to the powder spraying operating point;
FIG. 5 is a schematic view of an auxiliary gas delivery line assist blowing;
fig. 6 is a powder spraying system of example 1.
Reference numerals:
1-a material storage module; 101-a discharging hopper; 102-a storage bin; 103-a transmitting device; 2-a conveying module; 201-main powder conveying pipeline; 202-auxiliary gas delivery line; 203-pressure alarm device; 204-auxiliary gas branch line; 205-gas control valve; 206-a check valve; 3-powder spraying module; 301-a receiving device; 302-powder spraying device; 303-powder spraying working point; 304-a shunt device; 305-a confluence device; 4-a gas control unit; 401-gas storage means; 402-storage module gas control valve station; 402-1-branch pipeline for communicating the gas control valve station of the storage module with the top of the sending device; 402-2-branch pipeline for communicating the gas control valve station of the storage module with the bottom of the sending device; 402-3-branch pipeline for communicating the gas control valve station of the storage module with the main powder conveying pipeline; 403-transport module gas control valve station; 404-powder spraying module gas control valve station; 404-1-branch pipeline for communicating the powder spraying module gas control valve station with the top of the powder spraying device; 404-2-branch pipeline for communicating the powder spraying module gas control valve station with the bottom of the powder spraying device; 5-a dust remover; 6-humidity transmitter.
Detailed Description
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.
The existing powder spraying system is an integrated system with a powder storage function and a powder spraying function, and has the defects of small powder storage amount, frequent powder loading and low production efficiency, and is usually placed on an operation platform nearby an electric arc furnace; when the powder spraying amount demand is increased, the height of the powder spraying system with increased capacity is also increased obviously, more space of a workshop is occupied, the difficulty of installation and maintenance is increased, and the capacity increase of the powder bin is limited; for a common electric arc furnace with less than 50t, a powder spraying system is generally matched to spray single-branch or double-branch carbon powder due to small furnace type and small powder spraying amount, however, the carbon powder spraying amount of the novel electric arc furnace technology is increased to more than 20kg/t, the powder spraying point and the powder spraying time are increased, multiple branches of continuous powder spraying are required to be carried out, and the existing single-set powder spraying system cannot meet the requirements at this moment. In addition, the demands of the production scale expansion and the production flow expansion on the number of equipment are increased, for example, the powder injection of a single steelmaking furnace is expanded into the powder injection of a plurality of steelmaking furnaces, the powder injection of a single furnace type is expanded into the powder injection of an electric arc furnace and a converter combined furnace type, the powder injection of a single steelmaking process is expanded into the powder injection of multiple processes of steelmaking and refining, and the like, so the requirements on the expansibility of the powder injection function are also provided, but the conventional powder injection system does not have the characteristic at present. In order to improve the technological level of powder spraying, the new technology mostly focuses on adjusting the spraying parameters or modifying local parts, and neglects the improvement and optimization of powder storage, powder feeding and powder spraying systems, and the optimization in the aspect can quickly and effectively exert the technological effect of powder spraying and improve the technological efficiency of steelmaking.
Therefore, an embodiment of the present invention provides a distributed powder spraying system, as shown in fig. 1, the distributed powder spraying system includes a feeding work area, a conveying work area, a powder spraying work area, and a gas control unit 4; the feeding working area comprises at least one material storage module 1, the conveying working area comprises at least one conveying module 2, and the powder spraying working area comprises at least one powder spraying module 3; the material storage module 1, the conveying module 2 and the powder spraying module 3 are not simultaneously one;
each storage module 1 is connected with at least one conveying module 2, each powder spraying module 3 is connected with at least one conveying module 2, the gas control unit 4 is respectively communicated with the storage module 1, the conveying module 2 and the powder spraying module 3, and the gas control unit 4 provides gas for conveying powder for the storage module 1, the conveying module 2 and the powder spraying module 3;
a valve is arranged between the material storage module 1 and the conveying module 2, and a valve is arranged between the powder spraying module 3 and the conveying module 2.
In the invention, preferably, a plurality of storage modules 1, a plurality of conveying modules 2 and a plurality of powder spraying modules 3 are provided. "plurality" means two or more.
When the distributed powder spraying system is implemented, powder in the storage module 1 enters the powder spraying module 3 through the conveying module 2 to spray powder on a powder spraying working point.
According to the distributed layout mode, the feeding working area can be arranged in a workshop to facilitate feeding and a larger space area, the powder spraying working area is arranged nearby near the powder spraying working point, and the powder in the two areas is conveyed remotely through the conveying working area, so that the problem of insufficient space near the working point is solved.
The distributed powder spraying system can flexibly combine modules through valve switching according to a smelting process, the material storage modules 1 and the powder spraying modules 3 are connected and freely combined through the conveying modules 2, one-to-one and one-to-many arrangement can be realized, and when a plurality of material storage modules 1, a plurality of conveying modules 2 and a plurality of powder spraying modules 3 are arranged, many-to-many arrangement can also be realized; the powder storage quantity and the powder spraying quantity are large, continuous powder spraying can be realized, and the powder spraying efficiency is improved; in addition, the distributed powder spraying system is flexible in installation area and is not limited by space.
The inlet of each powder spraying module 3 is butted with a plurality of storage modules 1 through the conveying module 2, and the storage modules 1 can be switched through the control valve, so that sufficient powder storage of each powder point is ensured during production; moreover, the maintenance difficulty of the pipeline equipment is increased after the powder spraying amount is increased, and the equipment of the material storage module 1 can be switched when needing maintenance or having faults, so that the production is smooth.
Specifically, as shown in fig. 2, the magazine module 1 includes a magazine and a delivery device 103, and the magazine is communicated with the delivery device 103. The assembling mode of the storing device and the sending device 103 can be selected to be integrated or split according to the site. When the split type is adopted, one storage device can be connected with a plurality of sending devices 103, and the flexible switching combination of the storage device and the sending devices 103 is realized.
Illustratively, the storage device includes a storage bin 102 and a lower hopper 101 eccentrically disposed at the top of the storage bin 102, powder enters the storage bin 102 through the lower hopper 101, and the powder in the storage bin 102 enters the conveying module 2 through the sending device 103. The installation area of the storage module 1 is more flexible, and the storage bin has large-scale conditions, so that the powder can be conveniently supplied to a furnace type with large powder spraying quantity demand.
In the invention, the storage module 1 and the powder spraying module 3 are separated, and the storage bin 102 is flexibly arranged and can be placed at a wide space, so that the storage bin 102 has a large-scale condition, and the volume of the storage bin 102 can reach 10-200m3And the shape of the storage bin 102 can be flexibly designed. The inlet and outlet of the storage bin 102 are provided with valves for controlling the inlet and outlet of the powder.
In the present invention, a valve is disposed at the inlet of the sending device 103. A pressure equalizing pipeline is arranged between the sending device 103 and the storage bin 102 and is used for adjusting the gas pressure in the sending device 103. The sending device 103 may be a sending tank, the volume of which may be determined according to the actual situation, e.g. the volume of which is 1-10m3。
In the present invention, the shapes of the discharging hopper 101 and the storage bin 102 are not particularly limited as long as the discharging and storing purposes can be achieved, for example, as shown in fig. 2, the discharging hopper 101 may be a closed hopper shape, the storage bin 102 may be a square body with a hopper-shaped bottom, the sending device 103 may be a tank body, the outlet of the discharging hopper 101 is directly connected to the inlet of the storage bin 102, and a valve is disposed at the connection; the blanking hopper 101 is arranged at the upper part of the storage bin 102; when the storage devices and the sending devices are distributed, the outlet of the storage bin 102 is communicated with the inlet of at least one sending device 103 through a pipeline, and valves are arranged at the outlet of the storage bin 102 and the inlet of the sending device 103. The bottom of the storage bin 102 is connected with the top of the sending device 103 through an obliquely arranged pipeline, and the position of the connecting end of the pipeline connected with the bottom of the storage bin 102 is lower than the position of the connecting end of the pipeline connected with the top of the sending device 103. In order to facilitate the control of the powder entering the sending device 103, preferably, the pipeline includes a horizontal segment, a straight segment and an elbow segment which are connected in sequence, the horizontal segment is connected with the bottom of the storage bin 102, the elbow segment is coaxially connected with the top of the sending device 103, and the diameter of the elbow segment satisfies: the elbow section is larger than the horizontal section and larger than the straight line section, the diameter of the horizontal section is matched with the size of a discharge port at the bottom of the storage bin 102, the diameter of the elbow section is matched with the size of a feeding port at the top of the sending device 103, and the included angle between the straight line section and the horizontal plane is 25-45 ℃.
Specifically, as shown in fig. 2 and 3, the conveying module 2 includes a main powder conveying pipeline 201 and an auxiliary gas conveying pipeline 202, each sending device 103 is communicated with at least one main powder conveying pipeline 201, and the auxiliary gas conveying pipeline 202 is communicated with the main powder conveying pipeline 201. The main powder conveying pipeline 201 is used for conveying powder, and the auxiliary gas conveying pipeline 202 is used for assisting blowing or blowing blockage of the main powder conveying pipeline 201.
In the present invention, a valve is disposed between the sending device 103 and the main powder conveying pipeline 201, and is used for switching the combination of different sending devices 103 and different main powder conveying pipelines 201. Preferably, each of the delivery devices 103 is in communication with each of the main powder delivery lines 201, so that more combinations of delivery devices 103 and main powder delivery lines 201 are possible.
In order to enable the auxiliary gas conveying pipeline 202 to assist blowing or blowing blocking for the main powder conveying pipeline 201 in time, it is preferable that, as shown in fig. 5, a plurality of pressure alarm devices 203 are arranged at different positions on the main powder conveying pipeline 201, a plurality of auxiliary gas branch pipelines 204 are arranged at different positions on the auxiliary gas conveying pipeline 202, the auxiliary gas branch pipelines 204 are communicated with different positions of the main powder conveying pipeline 201, and the pressure alarm devices 203 are arranged between two adjacent auxiliary gas branch pipelines 204. In the preferred embodiment, when powder conveying is jammed, the pressure alarm device 203 alarms, a jam point is locked according to the position of the pressure alarm device 203, and then the auxiliary gas branch pipeline 204 at different positions is opened for gradual blowing-assisting or blowing-blocking.
In the present invention, it is preferable that the auxiliary gas branch line 204 is provided with a gas control valve 205 and a check valve 206. The gas for controlling each auxiliary gas branch line 204 enters the main powder conveying line 201.
In the present invention, the sending device 103 is communicated with the main powder conveying pipeline 201 through a pipeline, and the auxiliary gas branch pipeline 204 may be communicated with a pipeline between the sending device 103 and the main powder conveying pipeline 201, or may be directly communicated with the main powder conveying pipeline 201.
Specifically, as shown in fig. 3, the powder spraying module 3 includes a material receiving device 301 and a powder spraying device 302, an inlet of the material receiving device 301 is communicated with at least one main powder conveying pipeline 201, powder in the main powder conveying pipeline 201 enters the powder spraying device 302 through the material receiving device 301, and a powder outlet of the powder spraying device 302 is communicated with a powder spraying work point 303. Further preferably, the inlet of each receiving device 301 is communicated with each powder conveying main pipeline 201. So as to switch different main powder conveying pipelines 201 to convey the powder into the receiving device 301 under different conditions.
Preferably, valves are arranged at the inlet and outlet of each receiving device 301 and each powder spraying device 302 for controlling the inlet and outlet of the powder. Further preferably, the powder spraying device 302 is communicated with a plurality of material receiving devices 301.
Preferably, the receiving device 301 comprises a first conical portion and a second conical portion which are connected with each other through a round bottom surface, an upper vertex of the first conical portion is an inlet communicated with the main powder conveying pipeline 201, and a lower vertex of the second conical portion is communicated with an inlet of the powder spraying device 302. In order to facilitate the powder discharge control and the gas path connection of the powder spraying device 302, the powder spraying device 302 comprises a curved surface-shaped top section, a cylindrical section and a circular truncated cone section which are connected in sequence.
In the present invention, in order to facilitate controlling the main powder conveying pipeline 201 to distribute powder into the receiving device 301, a shunting device 304 is preferably disposed at a connection of the receiving device 301 and the main powder conveying pipeline 201. The powder is switched by the shunting device 304 to enter different material receiving devices 301, and then switched by valves at the outlets of the material receiving devices 301 to enter different powder spraying devices 302. Therefore, each powder spraying module 3 is butted with a plurality of storage modules 1.
In the present invention, the shapes of the material receiving device 301 and the powder spraying device 302 are not particularly limited as long as the object of the present invention can be achieved, for example, as shown in fig. 3, the material receiving device 301 may be a closed funnel shape, the inlet and the outlet of the material receiving device 301 are respectively provided with a valve, the powder spraying device 302 may be a tank shape, the inlet and the outlet of the powder spraying device 302 are respectively provided with a valve, the outlet of the material receiving device 301 may be directly communicated with the inlet of the powder spraying device 302, the material receiving device 301 may be disposed on the upper portion of the powder spraying device 302, or the material receiving device 301 and the powder spraying device 302 are communicated by using a distributed pipeline. A pressure equalizing pipeline is arranged between the material receiving device 301 and the powder spraying device 302 and is used for adjusting the gas pressure in the powder spraying device 302.
In the present invention, in order to accurately control the powder spraying amount, preferably, the valve at the outlet of the powder spraying device 302 is a flow regulating valve.
In the invention, the powder spraying device 302 may be provided with one or more powder outlets, and the number of the powder outlets is not limited and may be selected according to the actual process conditions. However, in order to switch between the powder spraying devices 302 and the powder spraying operating points 303, preferably, as shown in fig. 4, the powder spraying devices 302 are provided with 2 to 5 powder outlets, a confluence device 305 is provided between the powder outlets and the powder spraying operating points 303, and each powder outlet on the same powder spraying device 302 is communicated with a different powder spraying operating point 303 through the confluence device 305. In the preferred embodiment, 2 to 5 powder outlets of the same powder spraying device 302 are connected with different powder spraying operating points 303 through a confluence device 305, online switching is realized through the confluence device 305, and for the same powder spraying operating point 303, the online switching of the confluence device 305 can be used for standby spraying, continuous powder supply is ensured, and the spraying capacity can be enhanced.
In the present invention, preferably, a valve is disposed between the confluence device 305 and each powder outlet, and a valve is disposed at an outlet of the confluence device 305. The valve is used for switching different powder outlets to spray powder to the powder spraying working point 303.
In the present invention, the gas control unit 4 is configured to provide a gas source and a control gas source for a system, and preferably, as shown in fig. 2, the gas control unit 4 includes a gas storage device 401, and the gas storage device 401 is respectively communicated with the sending device 103, the main powder conveying pipeline 201, the auxiliary gas conveying pipeline 202, and the powder spraying device 302. The gas storage device 401 provides blowing gas for the sending device 103, the main powder conveying pipeline 201, the auxiliary gas conveying pipeline 202 and the powder spraying device 302.
Further preferably, the gas storage device 401 is communicated with the inlet and the outlet of the sending device 103; the gas storage device 401 is communicated with the inlet of the powder spraying device 302, the bottom of the powder spraying device 302 and the powder outlet. The gas storage device 401 provides gas for the sending device 103 and the powder spraying device 302 to realize powder transportation and powder spraying.
In the present invention, in order to facilitate the control of the gas control unit 4 to provide gas to the material storage module 1, the conveying module 2, and the powder spraying module 3, preferably, the gas control unit 4 further includes a material storage module gas control valve station 402, a conveying module gas control valve station 403, and a powder spraying module gas control valve station 404, where the material storage module gas control valve station 402 is configured to control the gas storage device 401 to convey gas to the sending device 103 and the powder conveying main pipeline 201, the conveying module gas control valve station 403 is configured to control the gas storage device 401 to convey gas to the auxiliary gas conveying pipeline 202, and the powder spraying module gas control valve station 404 is configured to control the gas storage device 401 to convey gas to the powder spraying device 302. The gas medium of the gas control unit 4 may be nitrogen, air, carbon dioxide, argon or oxygen.
The storage module gas control valve station 402 is arranged on a pipeline between the gas storage tank 401 and the sending device 103 and a pipeline between the sending device 103 and the main powder conveying pipeline 201; a delivery module gas control valve station 403 is arranged on the pipeline between the gas holder 401 and the auxiliary gas delivery pipeline 202, and a powder spray module gas control valve station 404 is arranged on the pipeline between the gas holder 401 and the powder spray device 302.
Illustratively, the storage module gas control valve station 402, the conveying module gas control valve station 403 and the powder injection module gas control valve station 404 are arranged in parallel and are respectively communicated with the gas storage device 401.
Wherein, in order to control the powder supply of the sending device 103, the storage module gas control valve station 402 is provided with a branch pipe 402-1 communicated with the top of the sending device 103 and a branch pipe 402-2 communicated with the bottom of the sending device 103.
Similarly, in order to facilitate the control of powder spraying of the powder spraying device 302, the powder spraying module gas control valve station 404 has a branch pipe 404-1 communicated with the top of the powder spraying device 302 and a branch pipe 404-2 communicated with the bottom of the powder spraying device 302.
In addition, the storage module gas control valve station 402 is also provided with branch pipelines 402-3 communicated with the main powder conveying pipeline 201, and the number of the pipelines 402-3 communicated with the main powder conveying pipeline 201 is determined by the number of the main powder conveying pipeline 201.
In the invention, in order to ensure the smooth proceeding of the powder spraying process, all the devices and the connecting pipelines between the devices are preferably totally enclosed. The system of the invention is suitable for different furnace types, different processes and various powder blowing agents. Preferably, the storage bin 102 and the receiving device 301 are provided with a dust remover 5 and a humidity transmitter 6. The dust remover 5 is used for removing dust from the device and preventing blockage; the humidity transmitter 6 is used for monitoring the humidity of the system.
When the production scale of iron and steel enterprises is enlarged or the demand of the production flow expansion on the quantity of equipment is increased, the powder spraying system in the prior art is difficult to expand on the basis of the conventional powder spraying system.
In the present invention, in order to fully satisfy the requirement of expanded production, preferably, the distributed powder spraying system further includes a powder supply expansion area and a powder utilization expansion area, the powder supply expansion area is located at an inlet end of the main powder conveying pipeline 201, and the powder utilization expansion area is located at an outlet end of the main powder conveying pipeline 201. When the powder supply demand is increased, a new material storage module 1 can be added in the powder supply expansion area at the inlet end; when the powder using requirement is increased, a new powder spraying module 3 can be added in the powder using expansion area at the tail end. Therefore, when the smelting furnace needs to be added with new powder spraying points or new furnaces, the requirement of expanding production can be fully met by the powder supply expansion area and the powder using expansion area.
In order to improve the operation convenience of the distributed powder spraying system, the distributed powder spraying system preferably further comprises an automatic control unit, and the automatic control unit is connected with the material storage module 1, the conveying module 2 and the powder spraying module 3. The automatic control unit is used for remotely controlling the feeding, discharging, conveying, pipeline and device switching and the like of the material storage module 1, the conveying module 2 and the powder spraying module 3. Further preferably, the automatic control unit comprises three modes of full-automatic control, semi-automatic control and manual control, and the three modes can be switched according to actual convenience.
On the other hand, the invention provides a distributed powder spraying method, and by adopting the distributed powder spraying system, the distributed powder spraying method comprises the following steps: powder enters the storage bin 102 through the blanking hopper 101, the powder in the storage bin 102 enters the main powder conveying pipeline 201 through the sending device 103, the powder from the main powder conveying pipeline 201 enters the receiving device 301, and then enters the powder spraying device 302, so that the powder spraying work point 304 is sprayed with powder.
Further preferably, when the powder in the storage bin of the powder spraying module 3 corresponding to the powder spraying operating point 304 is insufficient, the humidity does not meet the requirement, or an equipment fault occurs, the powder spraying module 3 is switched, the valve of the powder outlet of the currently operating powder spraying device 302 is closed, powder spraying is stopped, maintenance or powder loading is performed, the powder spraying module 3 is switched through the confluence device 305, and the valve of the powder outlet of the powder spraying device 302 corresponding to the standby pipeline is opened to spray powder;
when the powder of the sending device 103 is insufficient, the humidity of the powder storage bin 102 is not satisfactory or equipment failure occurs, the material storage module 1 is switched. Stopping the powder feeding of the current sending device 103 through a valve, and switching the material storage module 1 to carry out the powder feeding of other modules;
when the conveying pipeline is blocked, the gradual dredging is adopted, the position of the blocked tail end is confirmed according to the signal of the pressure alarm device 203, the valve corresponding to the auxiliary gas conveying pipeline 202 is opened for dredging, when the pressure of the tail end is normal, the system continues to open the valve corresponding to the auxiliary gas conveying pipeline 202 at the front end position according to the signal of the front end pressure alarm device 203 until the action is finished when the pressure of each detection point is normal;
when the pipeline needs maintenance, the conveying module 2 and the corresponding storage module 1 are switched.
The distributed powder spraying system of the invention is further illustrated by the following specific examples.
Example 1
The powder spraying system of the embodiment is applied to a scrap steel continuous preheating electric arc furnace, and is provided with 3 powder spraying working points (powder spraying working points A, B, C), and the maximum powder consumption is 2000 kg/furnace.
The powder spraying system (as shown in fig. 6) includes 2 storage modules (storage module A, B), 2 conveying modules (conveying module A, B), and 3 powder spraying modules (powder spraying module A, B, C). The distributed layout design is carried out according to the process requirements, the storage modules are located at a position 100 meters away from a powder spraying working point of the furnace, the powder spraying modules are located on the electric arc furnace platform and near the electric arc furnace, the sending device of each storage module is respectively communicated with the main powder conveying pipeline of each conveying module through a pipeline, and a valve is arranged on the pipeline between the sending device and the main powder conveying pipeline; each main powder conveying pipeline is respectively communicated with the receiving devices of the 3 powder spraying modules through pipelines, a valve is arranged on the pipeline between the main powder conveying pipeline and the receiving devices, two powder outlets are arranged at outlets of the powder spraying devices of the powder spraying modules, and each powder outlet on the same powder spraying device is connected with different powder spraying working points through a confluence device (confluence device A, B, C); the inner diameter of the main powder conveying pipeline is 150mm, a pressure alarm device is arranged between an outlet of the sending device and an ascending pipe section of the main powder conveying pipeline at intervals of 2-5m on the main pipeline, and at least 2 pressure alarm devices are arranged on each pipeline section. The pressure alarm device is matched with the auxiliary gas branch pipeline, the main pipeline is communicated with the auxiliary gas conveying pipeline through the auxiliary gas branch pipeline, the inner diameter of the auxiliary gas conveying pipeline is 20mm, and the auxiliary gas branch pipeline is provided with a gas control valve and a check valve. The head and the tail of the main pipeline part of the horizontal pipe section are provided with pressure alarm devices.
The connection relationship between the powder spraying device and the powder spraying working point is as follows: as shown in fig. 4, the powder spraying device a includes two powder outlets a1 and a2, the powder spraying device B includes two powder outlets B1 and B2, and the powder spraying device C includes two powder outlets C1 and C2; the powder outlets A1 and C1 are communicated with the confluence device A, and the powder at the powder outlets A1 and C1 enters a powder spraying working point A after being converged by the confluence device A; powder outlets A2 and B1 are communicated with a confluence device B, and powder at the powder outlets A2 and B1 is converged by the confluence device B and then enters a powder spraying working point B; the powder outlets B2 and C2 are communicated with the confluence device C, and the powder at the powder outlets B2 and C2 is converged by the confluence device C and then enters a powder spraying working point C; and each powder outlet is switched by a valve on the confluence device.
Opening a valve between the material storage module A and the conveying module A, closing a valve between the material storage module A and the conveying module B, closing valves between the material storage module B and the conveying module A and the conveying module B, opening a valve between the conveying module A and the powder spraying module A, closing valves between the conveying module A and the powder spraying module B and the powder spraying module C, and closing valves between the conveying module B and the powder spraying module A, the powder spraying module B and the powder spraying module C, so that the arrangement modes of 1 material storage module, 1 conveying module and 1 powder spraying module are realized, namely one-to-one;
the method comprises the following steps of opening valves between a material storage module A and a conveying module A as well as a conveying module B, closing valves between the material storage module B and the conveying module A as well as the conveying module B, opening valves between the conveying module A and a powder spraying module A as well as the powder spraying module B, closing valves between the conveying module A and a powder spraying module C, and opening valves between the conveying module B and the powder spraying module B as well as the powder spraying module C, so that the arrangement modes of 1 material storage module, 2 conveying modules and 3 powder spraying modules are realized, namely, one for many;
open storage module A and carry module A, carry the valve between the module B, open storage module B and carry module A, carry the valve between the module B, open and carry module A and the valve between the module A of dusting, the module B of dusting, the module C of dusting, open and carry module B and the module A of dusting, the module B of dusting, the valve between the module C of dusting, realize 2 storage modules, 2 setting modes of carrying module and 3 modules of dusting, many-to-many promptly.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.
Claims (10)
1. A distributed powder spraying system is characterized by comprising a feeding working area, a conveying working area, a powder spraying working area and a gas control unit (4);
the feeding working area comprises at least one material storage module (1), the conveying working area comprises at least one conveying module (2), and the powder spraying working area comprises at least one powder spraying module (3); the material storage module (1), the conveying module (2) and the powder spraying module (3) are not simultaneously one;
each storage module (1) is connected with at least one conveying module (2), each powder spraying module (3) is connected with at least one conveying module (2), the gas control unit (4) is respectively communicated with the storage module (1), the conveying module (2) and the powder spraying module (3), and the gas control unit (4) provides gas for conveying powder for the storage module (1), the conveying module (2) and the powder spraying module (3);
a valve is arranged between the material storage module (1) and the conveying module (2), and a valve is arranged between the powder spraying module (3) and the conveying module (2).
2. A distributed powder spraying system according to claim 1, wherein the magazine module (1) comprises a magazine and a delivery device (103), the magazine being in communication with the delivery device (103);
preferably, the storage device comprises a lower hopper (101) and a storage bin (102).
3. A distributed powder spraying system according to claim 2, wherein the delivery module (2) comprises a main powder delivery line (201) and a secondary gas delivery line (202), each of the delivery devices (103) being in communication with at least one of the main powder delivery lines (201), the secondary gas delivery line (202) being in communication with the main powder delivery line (201).
4. A distributed powder spraying system according to claim 3, characterized in that the powder spraying module (3) comprises a material receiving device (301) and a powder spraying device (302), the inlet of the material receiving device (301) is communicated with at least one main powder conveying pipeline (201), the powder in the main powder conveying pipeline (201) passes through the material receiving device (301) and then enters the powder spraying device (302), and the powder outlet of the powder spraying device (302) is communicated with a powder spraying working point (303).
5. A distributed powder spraying system as claimed in claim 4, characterized in that the powder spraying device (302) is provided with 2-5 powder outlets, a confluence device (305) is arranged between the powder outlets and the powder spraying operating points (303), and each powder outlet on the same powder spraying device (302) is communicated with different powder spraying operating points (303) through the confluence device (305).
6. A distributed powder spraying system according to claim 4 or 5, wherein the gas control unit (4) comprises a gas storage device (401), the gas storage device (401) being in communication with the sending device (103), the main powder delivery conduit (201), the auxiliary gas delivery conduit (202) and the powder spraying device (302), respectively.
7. A distributed powder spraying system according to claim 4 or 5, wherein a dust collector (5) and a humidity transducer (6) are arranged on the storage silo (102) and the receiving device (301).
8. A distributed powder spraying system according to claim 3, further comprising a powder supply expansion zone at the inlet end of the main powder delivery conduit (201) and a powder expansion zone at the outlet end of the main powder delivery conduit (201).
9. A distributed powder spraying system according to claim 1, characterized in that the distributed powder spraying system further comprises an automatic control unit, which is connected to the storage module (1), the transport module (2) and the powder spraying module (3).
10. A distributed powder spraying method, characterised in that a distributed powder spraying system as claimed in claims 2 to 9 is used, the distributed powder spraying method comprising: the powder enters the storage bin (102) through the discharging hopper (101), the powder in the storage bin (102) enters the main powder conveying pipeline (201) through the sending device (103), the powder from the main powder conveying pipeline (201) enters the receiving device (301), and then enters the powder spraying device (302), and the powder spraying working point (304) is sprayed with powder.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101254861A (en) * | 2008-03-07 | 2008-09-03 | 王向明 | Fine coal dense phase conveying system of fusion reducing furnace |
| JP2010196090A (en) * | 2009-02-24 | 2010-09-09 | Nippon Steel Corp | Control device for blowing of pulverized coal |
| CN104437923A (en) * | 2014-11-25 | 2015-03-25 | 钢铁研究总院 | Automatic powder spraying device |
| JP2019026483A (en) * | 2017-08-03 | 2019-02-21 | Ｊｆｅスチール株式会社 | Mixed feeding method and mixed feeding equipment of powdery and granular material, mixed feeding-adding method of steel refining agent and steel refining method |
| CN212293649U (en) * | 2020-04-24 | 2021-01-05 | 山东墨龙石油机械股份有限公司 | HIsmelt technology composite desulfurization recarburization device |
| CN214032566U (en) * | 2020-07-20 | 2021-08-24 | 山东墨龙石油机械股份有限公司 | Reducing agent blowing system for smelting reduction process |
| CN113699306A (en) * | 2021-08-25 | 2021-11-26 | 中冶赛迪工程技术股份有限公司 | Composite bottom blowing multielement medium system and method for direct current arc furnace bottom electrode |
-
2021
- 2021-12-27 CN CN202111616662.8A patent/CN114410888B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101254861A (en) * | 2008-03-07 | 2008-09-03 | 王向明 | Fine coal dense phase conveying system of fusion reducing furnace |
| JP2010196090A (en) * | 2009-02-24 | 2010-09-09 | Nippon Steel Corp | Control device for blowing of pulverized coal |
| CN104437923A (en) * | 2014-11-25 | 2015-03-25 | 钢铁研究总院 | Automatic powder spraying device |
| JP2019026483A (en) * | 2017-08-03 | 2019-02-21 | Ｊｆｅスチール株式会社 | Mixed feeding method and mixed feeding equipment of powdery and granular material, mixed feeding-adding method of steel refining agent and steel refining method |
| CN212293649U (en) * | 2020-04-24 | 2021-01-05 | 山东墨龙石油机械股份有限公司 | HIsmelt technology composite desulfurization recarburization device |
| CN214032566U (en) * | 2020-07-20 | 2021-08-24 | 山东墨龙石油机械股份有限公司 | Reducing agent blowing system for smelting reduction process |
| CN113699306A (en) * | 2021-08-25 | 2021-11-26 | 中冶赛迪工程技术股份有限公司 | Composite bottom blowing multielement medium system and method for direct current arc furnace bottom electrode |
Non-Patent Citations (4)
| Title |
|---|
| （苏）西多连柯: "《喷粉冶金的理论和实践》", 30 September 1983, 冶金工业出版社 * |
| 张永华等: "顶枪喷粉***在RH炉冶炼中的应用", 《冶金设备》 * |
| 李传薪: "《钢铁厂设计原理 下》", 31 May 1995, 冶金工业出版社 * |
| 阎立懿: "《特殊钢丛书 现代电炉炼钢工艺及装备》", 30 September 2011, 冶金工业出版社 * |
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