CN210886172U

CN210886172U - Ferronickel production facility

Info

Publication number: CN210886172U
Application number: CN201921854057.2U
Authority: CN
Inventors: 吴联权; 孙晓晖; 冉隆军
Original assignee: Yangjiang Yichuan Metal Technology Co ltd
Current assignee: Yangjiang Yichuan Metal Technology Co ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-06-30
Anticipated expiration: 2029-10-30

Abstract

The utility model provides a ferronickel production facility, including two at least ferronickel production lines, every ferronickel production line is including the hot stove in the ore deposit, rotary kiln, hot-blast furnace, drying kiln and the sweetener that set gradually, is provided with electric dust collecting equipment between drying kiln and the sweetener, be provided with the draught fan between electric dust collecting equipment and the sweetener, hot stove in the ore deposit, rotary kiln, hot-blast furnace, drying kiln and sweetener loop through the hot-blast line intercommunication be provided with the intercommunication pipeline that communicates adjacent two sets of production line hot-blast line between drying kiln and the electric dust collecting equipment, be provided with the diverter valve on the road communicating pipe, the hot-blast line is provided with the isolation valve on the road between intercommunication pipeline and. The utility model provides a ferronickel production facility is through passing through the pipeline intercommunication with different production lines to set up corresponding valve member, just can realize not stopping the stove through the conversion of pipeline when overhauing and overhaul electrostatic precipitator equipment, from not influencing production, improved productivity effect and maintenance factor of safety.

Description

Ferronickel production facility

Technical Field

The utility model relates to an ore smelting field, in particular to ferronickel production facility.

Background

In the production process of ferronickel, a large amount of smoke and dust can be generated in the submerged arc furnace and the rotary kiln, in the process flow of the production process of the ferronickel RKEF, the negative pressure generated by an electric dust removal device and an induced draft fan is utilized to recycle the waste heat and the smoke and dust in the submerged arc furnace and the rotary kiln, wet ore is dried, the smoke and dust are purified, then the wet ore and the purified smoke and dust enter a desulfurization device, and finally the wet ore and the purified smoke and. When the original RKEF ferronickel production process negative pressure environment-friendly equipment needs to be maintained, electric dust removal maintenance can be carried out after the processes of smelting, roasting and drying are stopped and the temperature is reduced, so that a large amount of heat energy and time are wasted, and the energy conservation and consumption reduction of enterprises are not facilitated.

Disclosure of Invention

To the problem, the utility model provides a ferronickel production facility can need not blow out when overhauing electrostatic precipitator equipment, does not basically influence production.

The utility model provides a ferronickel production facility, including two at least ferronickel production lines, every the ferronickel production line is including the hot stove in ore deposit, rotary kiln, hot-blast furnace, drying kiln and the sweetener that sets gradually, be provided with electric dust collecting equipment between drying kiln and the sweetener, be provided with the draught fan between electric dust collecting equipment and the sweetener, hot stove in ore deposit, rotary kiln, hot-blast furnace, drying kiln and sweetener loop through the hot-blast line intercommunication be provided with the intercommunication pipeline that communicates adjacent two sets of production line hot-blast line between drying kiln and the electric dust collecting equipment, be provided with the diverter valve on the road communicating pipe, the hot-blast line is provided with the isolation valve on the road between intercommunication pipeline and electric dust collecting.

Preferably, a cyclone dust collector is arranged between the submerged arc furnace and the rotary kiln.

Preferably, a dust drop chamber is arranged between the cyclone dust collector and the submerged arc furnace.

Preferably, the air inlet of the dust settling chamber is arranged at the lower part, and the air outlet of the dust settling chamber is arranged at the upper part.

Preferably, the switching valve and the isolation valve are both pneumatic switching louver valves.

Preferably, at least two of said ferronickel production lines share one desulphurisation plant.

Preferably, the diameter of the hot air pipeline at the air inlet of the electric dust removal equipment is gradually increased.

Preferably, the air outlet of the electric dust removing equipment is positioned at the upper part of the electric dust removing equipment.

After the technical scheme is adopted, the utility model discloses following beneficial effect has:

the utility model provides a ferronickel production facility is through passing through the pipeline intercommunication with different production lines to set up corresponding valve member, just can realize not stopping the stove through the conversion of pipeline when overhauing and overhaul electric precipitation equipment, from not influencing production, improved productivity effect and maintenance factor of safety. On the basis, the production system is also provided with the cyclone dust collector and the dust settling chamber, so that the dust removal effect can be further improved, and the flue gas inlet and outlet of the dust settling chamber are characterized by low inlet and high outlet, so that the sedimentation effect can be effectively improved. The hot-blast main of the import of electrostatic precipitator adopts the loudspeaker form of diameter crescent, can reduce flue gas velocity and improve dust removal effect. Different production lines can share one desulfurization device, so that the utilization rate of the device can be improved, and the occupied space of the device can be reduced.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent in light of the detailed description of the preferred embodiments of the present invention as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.

FIG. 1 is a schematic plan view of a ferronickel production facility according to a preferred embodiment of the present invention;

FIG. 2 is a flow chart of flue gas treatment of the ferronickel production equipment in the preferred embodiment of the present invention;

fig. 3 is a schematic diagram of the position of the communication pipeline according to the preferred embodiment of the present invention.

Reference numerals: 1 submerged arc furnace, 2 rotary kilns, 3 hot blast stoves, 4 drying kilns, 5 sweetener, 6 electric precipitation equipment, 7 draught fans, 81 cyclone, 82 dust falling chambers, 91 hot-blast pipelines, 92 communicating pipelines, 93 switching valves and 94 isolating valves.

Detailed Description

The technical solution of the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and can implement the present invention, but the embodiments are not limited to the present invention.

Referring to fig. 1-3, in the process flow of the production of RKEF ferronickel, the negative pressure generated by the induced draft fan of the electric dust removal device 6 is utilized to recycle the residual heat and smoke dust in the submerged arc furnace 1 and the rotary kiln 2, dry wet ore and purify smoke dust, then enter the desulfurization device, and finally are discharged into the atmosphere. The utility model provides a ferronickel production facility, this system can not only realize the recycle of ferronickel smelting in-process high temperature flue gas, can just accomplish the maintenance without blowing out the stove when maintenance electrostatic precipitator 6 moreover. The system comprises at least 2 ferronickel production lines, each ferronickel production line comprises a submerged arc furnace 1, a rotary kiln 2, a hot blast stove 3, a drying kiln 4 and a desulfurization device 5 which are sequentially arranged. The high-temperature flue gas generated by the submerged arc furnace 1 and the rotary kiln 2 contains part of combustible gases such as CO, and the high-temperature flue gas flows into the hot blast stove 3 under the action of negative pressure and can be used as part of fuel of the hot blast stove 3. An electric dust removal device 6 is arranged between the drying kiln 4 and the desulphurization device 5, and the electric dust removal device 6 can further remove mineral dust in the flue gas. The electric precipitation equipment 6 and the desulphurization equipment 5 are communicated with each other by an induced draft fan 7, and the induced draft fan 7 can enable the system to generate negative pressure so as to achieve the purpose of sucking flue gas. Hot stove 1 in ore deposit, rotary kiln 2, hot-blast furnace 3, dry kiln 4, electric dust collecting equipment 6 and sweetener 5 loop through hot-blast main 91 intercommunication be provided with the intercommunication pipeline 92 of the adjacent two sets of production line hot-blast main 91 of intercommunication between dry kiln 4 and the electric dust collecting equipment 6, be provided with switching valve 93 on the intercommunication pipeline 92, be provided with isolating valve 94 on hot-blast main 91 between intercommunication pipeline 92 and electric dust collecting equipment 6. In the production process, the electric dust removing equipment 6 is frequently required to be maintained, but the ore heating furnace 1, the rotary kiln 2, the hot blast furnace 3, the drying kiln 4 and the like are required to be stopped to reduce the temperature for maintenance. In the system, during maintenance, only the isolation valve 94 beside the electric dust removal equipment 6 to be maintained is needed to be closed, so that the flue gas is cut off from entering, then the switching valve 93 on the communication pipeline 92 is opened, and the flue gas of the production line to be maintained enters the electric dust removal equipment 6 of another production line through the communication pipeline 92. Therefore, related equipment on the maintenance line can be maintained without shutdown, and production is not affected basically, so that the influence of maintenance on production is reduced, and the production benefit and the maintenance safety factor are improved.

In the preferred embodiment, be provided with cyclone 81 between hot stove 1 in ore deposit and the rotary kiln 2, hot stove 1 in ore deposit can produce a large amount of high temperature flue gas when producing the smelting nickel ore, and the flue gas of hot stove 1 in ore deposit directly enters into cyclone 81, can improve dust removal effect, and the high temperature flue gas enters into the burning of second hot-blast furnace 3 part after tentatively removing dust, and high temperature flue gas also improves hot-blast furnace 3's efficiency, and cyclone 81 has good dust removal effect, the mine dust in the flue gas that can significantly reduce.

In the preferred embodiment, a dust settling chamber 82 is further arranged between the cyclone dust collector 81 and the submerged arc furnace 1. The dust settling chamber 82 can settle the mineral dust in the flue gas to achieve further dust removal, and then the mineral dust enters the cyclone dust collector 81 for further purification. Further, the air inlet of the dust settling chamber 82 is arranged at the lower part, and the air outlet of the dust settling chamber 82 is arranged at the upper part. Thus, the flue gas enters from the lower part of the dust falling chamber 82 and then flows out from the upper part, so that the heavier mine dust can be deposited at the lower part of the dust falling chamber 82, and the deposition effect of the dust falling chamber 82 can be improved.

In the preferred embodiment, the switching valve 93 and isolation valve 94 are both pneumatically switched louvered valves. The starting switching louver valve has the characteristics of reliable performance, zero sealing leakage, high control precision, high switching speed and good sealing performance of the whole machine, and can be automatically controlled and switched and can also be operated and switched on site by a single machine.

In the preferred embodiment, the ferronickel production lines share a single desulphurisation plant 5. The utilization rate of the equipment can be improved by sharing one desulfurization equipment 5, so that the occupied space of the equipment is reduced.

In preferred embodiment, hot-blast line 91 is in the air intake position diameter crescent of electrostatic precipitator 6, and the hot-blast line 91 of electrostatic precipitator air intake position is the loudspeaker form promptly, and the air intake area crescent to can reduce speed when making the flue gas get into electrostatic precipitator 6, be favorable to electrostatic precipitator 6 to improve dust removal effect, under the suction effect of draught fan 7 in addition, the air intake of the electrostatic precipitator 6 of horn mouth form still forms certain vacuum effect, be similar to the nozzle of jet pump, be favorable to the flue gas to enter into electrostatic precipitator 6.

In a preferred embodiment, the air outlet of the electric dust removing device 6 is located at the upper part of the electric dust removing device 6. The air outlet of the electric dust removing equipment 6 is positioned on the upper part, so that the flue gas can be fully purified by electric dust removal, and the dust removing effect is improved.

In the ferronickel smelting process, hot stove in ore deposit and rotary kiln can produce a large amount of flue gas, have a large amount of mine dusts in the flue gas, and electric dust collecting equipment can effectual purification flue gas, nevertheless need go up the hot stove in ore deposit of production line, rotary kiln etc. blowing out can examine and repair electric dust collecting equipment when overhauing, the utility model provides a ferronickel production facility is through passing through the pipeline intercommunication with different production lines to set up corresponding valve member, just can realize not stopping the stove and examine and repair electric dust collecting equipment through the conversion of pipeline when overhauing, from not influencing production, improved productivity effect and maintenance factor of safety. This production system still is provided with cyclone and dust fall room, improvement dust removal effect that can be further, and the dust fall room flue gas is imported and exported and is adopted the characteristics of low entering height, can effectively improve and subside the effect. The hot-blast main of the import of electrostatic precipitator adopts the loudspeaker form of diameter crescent, can reduce flue gas velocity and improve dust removal effect. Different production lines can share one desulfurization device, so that the utilization rate of the device can be improved, and the occupied space of the device can be reduced.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a ferronickel production facility, includes two at least ferronickel production lines, every the ferronickel production line is including hot stove in the ore deposit, rotary kiln, hot-blast furnace, drying kiln and the sweetener that sets gradually, its characterized in that, be provided with electric dust collecting equipment between drying kiln and the sweetener, be provided with the draught fan between electric dust collecting equipment and the sweetener, hot stove in the ore deposit, rotary kiln, hot-blast furnace, drying kiln and sweetener loop through the hot-blast line intercommunication be provided with the intercommunication pipeline that communicates adjacent two sets of production line hot-blast line between drying kiln and the electric dust collecting equipment, be provided with the diverter valve on the road communicating pipe, be provided with the isolating valve on the hot-blast line between intercommunication pipeline.

2. The ferronickel production plant of claim 1 wherein a cyclone is provided between the submerged arc furnace and the rotary kiln.

3. Ferronickel production plant according to claim 2, characterized in that a dust drop chamber is provided between the cyclone and the submerged arc furnace.

4. The ferronickel production plant of claim 3, wherein the air inlet of the dust settling chamber is provided at a lower portion, and the air outlet of the dust settling chamber is provided at an upper portion.

5. The ferronickel production plant of claim 1 wherein the switching valve and isolation valve are both pneumatically switched louvered valves.

6. Ferronickel production plant according to claim 1, characterized in that at least two of said ferronickel production lines share one desulphurizing plant.

7. The ferronickel production plant of claim 1, wherein the diameter of the hot air pipeline is gradually increased at the position of an air inlet of the electric precipitation plant.

8. The ferronickel production plant of claim 1, wherein the air outlet of the electric dust removal equipment is located at an upper portion of the electric dust removal equipment.