CN210570034U - Scrap iron preheating device based on flue gas waste heat of electric furnace - Google Patents
Scrap iron preheating device based on flue gas waste heat of electric furnace Download PDFInfo
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- CN210570034U CN210570034U CN201921633127.1U CN201921633127U CN210570034U CN 210570034 U CN210570034 U CN 210570034U CN 201921633127 U CN201921633127 U CN 201921633127U CN 210570034 U CN210570034 U CN 210570034U
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Abstract
The utility model discloses a scrap iron preheating device based on flue gas waste heat of an electric furnace, which comprises a feeding conveyor and the electric furnace, wherein a first preheating box, a second preheating box and a feeding trolley are arranged between the feeding conveyor and the electric furnace, the first preheating box comprises a preheating cavity and a discharging cavity, the top of the preheating cavity is provided with a feeding hopper, the inner wall of the preheating cavity is provided with a spiral heating pipe, a first transmission rod is vertically arranged in the preheating cavity, the first transmission rod is provided with a plurality of stirring rods, a second transmission rod is vertically arranged in the discharging cavity, and the second transmission rod is provided with a spiral blade; a chain plate conveyor is horizontally arranged in the second preheating box, a smoke outlet at the top of the electric furnace is connected with a smoke main pipe, a plurality of air inlet branch pipes communicated with the smoke main pipe are arranged at the top of the second preheating box, and a plurality of air outlet branch pipes are arranged at the bottom of the second preheating box. The device has the advantages of reliable structure, simple operation and low cost, and has better preheating effect.
Description
Technical Field
The utility model belongs to the technical field of the steelmaking, concretely relates to scrap iron preheating device based on electric stove flue gas waste heat.
Background
The short-flow steelmaking process of the electric arc furnace integrates the current advanced steelmaking technology, and becomes one of two main processes of steel production all over the world by virtue of the advantages of the short-flow steelmaking process in the aspects of investment, efficiency, energy conservation, environmental protection and the like. As is known, an electric arc furnace melts scrap steel metal through an electric arc to realize scrap iron smelting, and a large amount of electric energy needs to be consumed in the smelting process, so that excessive consumption of electric energy is reduced, and production cost is reduced. Therefore, it is objectively needed to develop a scrap iron preheating device based on the flue gas waste heat of the electric furnace, which has the advantages of reliable structure, simple operation, low cost, good preheating effect, long service life and high heat energy utilization rate.
Disclosure of Invention
An object of the utility model is to provide a scrap iron preheating device based on electric stove flue gas waste heat that structure is reliable, easy operation, with low costs, preheat effectual, long service life, heat utilization rate height.
The utility model aims at realizing the method, which comprises a feeding conveyor and an electric furnace, a first preheating box, a second preheating box and a feeding trolley are arranged between the feeding conveyor and the electric furnace, a baffle is vertically arranged in the first preheating box, the baffle divides the inner cavity of the first preheating box into a preheating cavity and a discharging cavity, the top of the preheating cavity is provided with a feeding hopper, an electric gate valve is arranged in the feeding hopper, the bottom of the baffle is provided with a communicating hole, the inner wall of the preheating cavity is provided with a spiral heating pipe, a first transmission rod is vertically arranged in the preheating cavity, the first transmission rod is provided with a plurality of stirring rods, the discharging cavity is vertically provided with a second transmission rod, the second transmission rod is provided with a spiral blade, the lower end of the first transmission rod penetrates out of the preheating cavity to be connected with a driving wheel, the lower end of the second transmission rod penetrates out of the discharging, the driven wheel is connected with the driving wheel through a transmission belt, and a discharge hole communicated with the second preheating box is arranged at the upper end of the discharge cavity; chain scraper conveyor is equipped with to horizontal installation in the second preheating cabinet, the discharge gate is located the top of chain scraper conveyor feed end, the outlet flue at electric stove top is connected with the flue gas and is responsible for, the draught fan is installed to the import department that the flue gas was responsible for, several and the flue gas are installed at the top of second preheating cabinet and are responsible for the inlet branch of intercommunication, the bottom of second preheating cabinet is provided with several branch pipes of giving vent to anger, several branch pipes of giving vent to anger are connected with a flue gas back flow, the import of spiral heating pipe is responsible for the intercommunication through first communicating pipe and flue gas, the export of spiral heating pipe is through second communicating pipe and.
Furthermore, a dust hood is arranged above the feed hopper.
Further, the top of the second preheating box is arranged in an arch shape.
Further, the top of the second preheating box is arranged in an arch shape.
Furthermore, the box body of the second preheating box comprises a steel lining and a heat preservation layer, and the heat preservation layer comprises a diatomite brick layer, a refractory fiber felt layer and a clay brick layer which are sequentially arranged from outside to inside.
Furthermore, the feeding end of the chain plate conveyor is positioned in the second preheating box, and a movable sealing cover is arranged between the discharging end of the chain plate conveyor and the second preheating box.
Furthermore, an air nozzle is arranged at the end part of each air inlet branch pipe extending into the secondary preheating box.
Compared with the prior art, the utility model has the advantages of: firstly, the spiral heating pipe in the first preheating box can preliminarily heat the scrap iron, the arranged stirring rod can stir the scrap iron raw material, the contact time of the scrap iron raw material and the spiral heating pipe is prolonged, the preheating effect is improved, and meanwhile, the arranged spiral blade can stably send the scrap iron raw material after preliminary preheating into the second preheating box; secondly, the waste iron raw materials that get into in the second preheating cabinet are at the in-process that the chain scraper conveyor carried, the high temperature flue gas direct injection that sprays from the top heats on the waste iron raw materials, can reach better preheating effect, and the high temperature flue gas after the heat transfer cooling that the branch pipe of giving vent to anger that sets up can be timely discharge, keep the temperature in the second preheating cabinet moderate, be favorable to guaranteeing the effect of preheating like this, let the temperature that gets into the stove for the waste iron temperature after preheating, thirdly, this device can retrieve the high temperature flue gas, realize the high-efficient utilization of heat energy. In conclusion, the device organically combines preheating and feeding, has the advantages of reliable structure, simple operation and low cost, has better preheating effect, can fundamentally improve the smelting speed of the electric furnace, and is easy to popularize and use.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
in the figure, 1-motor, 2-driving wheel, 3-first preheating box, 4-spiral heating pipe, 5-stirring rod, 6-first driving rod, 7-feeding conveyor, 8-dust hood, 9-feeding hopper, 10-first communicating pipe, 11-discharging port, 12-second preheating box, 13-insulating layer, 14-flue gas main pipe, 15-air inlet branch pipe, 16-chain plate conveyor, 17-induced draft fan, 18-electric furnace, 19-air outlet branch pipe, 20-flue gas return pipe, 21-driven wheel, 22-second communicating pipe, 23-driving belt, 24-communicating hole, 25-spiral blade and 26-second driving rod.
Detailed Description
The following further describes the present invention with reference to the attached drawings, but the present invention is not limited in any way, and any changes or improvements based on the teaching of the present invention all belong to the protection scope of the present invention.
As shown in fig. 1, the utility model comprises a feeding conveyor 7 and an electric furnace 18, the feeding conveyor 7 adopts a chain plate type lifter used in the prior art, a first preheating box 3, a second preheating box 12 and a charging trolley are arranged between the feeding conveyor 7 and the electric furnace 18, a partition board is vertically arranged in the first preheating box 3, the partition board divides the inner cavity of the first preheating box 3 into a preheating cavity and a discharging cavity, the top of the preheating cavity is provided with a feeding hopper 9, an electric gate valve is arranged in the feeding hopper 9, the bottom of the partition board is provided with a communication hole 24, a spiral heating pipe 4 is arranged on the inner wall of the preheating cavity, a first transmission rod 6 is vertically arranged in the preheating cavity, a plurality of stirring rods 5 are arranged on the first transmission rod 6, a second transmission rod 26 is vertically arranged in the discharging cavity, a spiral blade 25 is arranged on the second transmission rod 26, the lower end of the first transmission rod 6 penetrates out of the preheating cavity to be connected with a driving wheel 2, the lower end of the second transmission rod 26 penetrates out of the discharging cavity to be connected with a driven wheel 21, a motor 1 is mounted on the driving wheel 2, the motor 1 directly purchases a finished product motor sold in the market according to the used power, the driven wheel 21 is connected with the driving wheel 2 through a transmission belt 23, and a discharging hole 11 communicated with a second preheating box 12 is mounted at the upper end of the discharging cavity; chain slat conveyor 16 is equipped with to horizontal installation in second preheating cabinet 12, discharge gate 11 is located the top of the 16 feed ends of chain slat conveyor, the outlet flue at 18 tops of electric stove is connected with the flue gas and is responsible for 14, the flue gas is responsible for 14 import department and is installed draught fan 17, several and the flue gas are installed at the top of second preheating cabinet 12 and are responsible for the inlet branch 15 of 14 intercommunications with the flue gas, the bottom of second preheating cabinet 12 is provided with several outlet branch 19, and several outlet branch 19 is connected with a flue gas back flow 20, the import of spiral heating pipe 4 is responsible for 14 intercommunications with the flue gas through first communicating pipe 10, the export of spiral heating pipe 4 is through second communicating pipe 22 and flue gas back flow 20 intercommunications.
The utility model discloses a working process is: the crushed scrap iron is sent into a feeding conveyor 7 through an electromagnetic jack, the scrap iron is sent into a feed hopper 9 by the feeding conveyor 7, after the scrap iron enters the feed hopper 9, an electric gate valve is opened, the scrap iron in the feed hopper 9 falls into a preheating cavity, a spiral heating pipe 4 heats the scrap iron by high-temperature flue gas sent by a flue gas main pipe 14, then a motor 1 is started, the motor 1 drives a first transmission rod 6 and a second transmission rod 26 to rotate, the scrap iron in the preheating cavity is stirred and preheated, the preheating speed can be increased by stirring of a stirring rod 5, in the stirring process, the scrap iron enters a discharge cavity through a communication hole 24, the scrap iron entering the discharge cavity moves upwards under the action of a spiral blade 25 and enters a chain plate conveyor 16 through a discharge hole 11, the scrap iron is conveyed by the chain plate conveyor 16, the high-temperature flue gas generated by an electric furnace 18 enters each gas inlet branch pipe 15 through the flue gas main pipe 14, and through each inlet branch pipe 15 from the top direct injection of second preheating cabinet 12 on the scrap iron raw materials heats, direct heating's mode can reach better preheating effect like this, and at the in-process of heating, the high temperature flue gas after the heat transfer cooling that the branch pipe 19 of giving vent to anger that sets up can be timely discharge, the temperature in keeping second preheating cabinet 12 is moderate, be favorable to guaranteeing the effect of preheating like this, let the scrap iron temperature after preheating can be permanent the temperature that keeps going into the stove, the scrap iron after preheating cabinet 12 preheats gets into the feeding trolley, send into electric stove 18 by the feeding trolley finally and smelt.
In order to avoid the raise dust that produces among the feeding process, influence the production environment, the top of feeder hopper 9 is provided with suction hood 8.
In order to ensure that the high temperature flue gas is in sufficient contact with the scrap iron material on the chain scraper conveyor 16, the top of the second preheating chamber 12 is arched.
In order to further improve the utilization efficiency of heat energy and achieve a better preheating effect, the box body of the second preheating box 12 comprises a steel lining and a heat insulation layer 13, and preferably, the heat insulation layer 13 comprises a diatomite brick layer, a refractory fiber felt layer and a clay brick layer which are arranged in sequence from outside to inside.
In order to avoid dust pollution, the feeding end of the chain conveyor 16 is positioned in the second preheating box 12, and a movable sealing cover is arranged between the discharging end of the chain conveyor 16 and the second preheating box 12.
In order to improve the preheating efficiency and the preheating speed, an air nozzle is installed at the end of each air inlet branch pipe 15 extending into the secondary preheating chamber 12.
Claims (6)
1. The utility model provides a scrap iron preheating device based on electric stove flue gas waste heat, includes material loading conveyer (7) and electric stove (18), its characterized in that: a first preheating box (3), a second preheating box (12) and a charging trolley are arranged between a charging conveyor (7) and an electric furnace (18), a partition board is vertically arranged in the first preheating box (3), the partition board separates the inner cavity of the first preheating box (3) into a preheating cavity and a discharging cavity, the top of the preheating cavity is provided with a feeding hopper (9), an electric gate valve is arranged in the feeding hopper (9), the bottom of the partition board is provided with a communicating hole (24), the inner wall of the preheating cavity is provided with a spiral heating pipe (4), a first transmission rod (6) is vertically arranged in the preheating cavity, a plurality of stirring rods (5) are arranged on the first transmission rod (6), a second transmission rod (26) is vertically arranged in the discharging cavity, the second transmission rod (26) is provided with a spiral blade (25), the lower end of the first transmission rod (6) penetrates out of the preheating cavity and is connected with a driving wheel (2), the lower end of the second transmission rod (26) penetrates out of the discharging cavity to be connected with a driven wheel (21), a motor (1) is mounted on the driving wheel (2), the driven wheel (21) is connected with the driving wheel (2) through a transmission belt (23), and a discharging hole (11) communicated with the second preheating box (12) is mounted at the upper end of the discharging cavity;
chain slat conveyor (16) are equipped with to horizontal installation in second preheating cabinet (12), discharge gate (11) are located the top of chain slat conveyor (16) feed end, the outlet flue at electric stove (18) top is connected with the flue gas and is responsible for (14), the import department that the flue gas was responsible for (14) installs draught fan (17), inlet branch (15) that several and flue gas were responsible for (14) intercommunication are installed at the top of second preheating cabinet (12), the bottom of second preheating cabinet (12) is provided with several outlet branch (19), and several outlet branch (19) are connected with a flue gas back flow (20), the import of spiral heating pipe (4) is responsible for (14) intercommunication with the flue gas through first communicating pipe (10), the export of spiral heating pipe (4) is through second communicating pipe (22) and flue gas back flow (20) intercommunication.
2. The waste iron preheating device based on the flue gas waste heat of the electric furnace according to claim 1, which is characterized in that: and a dust hood (8) is arranged above the feed hopper (9).
3. The waste iron preheating device based on the flue gas waste heat of the electric furnace according to claim 1, which is characterized in that: the top of the second preheating box (12) is arranged in an arch shape.
4. The waste iron preheating device based on the flue gas waste heat of the electric furnace according to claim 1, which is characterized in that: the box body of the second preheating box (12) comprises a steel lining and a heat preservation layer (13), wherein the heat preservation layer (13) comprises a diatomite brick layer, a refractory fiber felt layer and a clay brick layer which are sequentially arranged from outside to inside.
5. The waste iron preheating device based on the flue gas waste heat of the electric furnace according to claim 1, which is characterized in that: the feeding end of the chain plate conveyor (16) is positioned in the second preheating box (12), and a movable sealing cover is arranged between the discharging end of the chain plate conveyor (16) and the second preheating box (12).
6. The waste iron preheating device based on the flue gas waste heat of the electric furnace according to claim 1, which is characterized in that: an air nozzle is arranged at the end part of each air inlet branch pipe (15) extending into the second preheating box (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921633127.1U CN210570034U (en) | 2019-09-28 | 2019-09-28 | Scrap iron preheating device based on flue gas waste heat of electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921633127.1U CN210570034U (en) | 2019-09-28 | 2019-09-28 | Scrap iron preheating device based on flue gas waste heat of electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210570034U true CN210570034U (en) | 2020-05-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921633127.1U Active CN210570034U (en) | 2019-09-28 | 2019-09-28 | Scrap iron preheating device based on flue gas waste heat of electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210570034U (en) |
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2019
- 2019-09-28 CN CN201921633127.1U patent/CN210570034U/en active Active
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