Flue gas recovery system for anode assembly phosphorus pig iron casting

Abstract

The utility model relates to the technical field of dust removal, in particular to a flue gas recovery system for anode assembly phosphorus pig iron casting, which comprises a dust removal system, a rotatable dust hood device and a control system, and the dust removal system is communicated with the rotatable dust hood device; the rotatable suction hood device discharges sucked flue gas into the dust removal system, and the dust removal system purifies the flue gas; the control system is electrically connected with the dust removal system and the rotatable dust hood device; the rotatable dust hood device comprises a supporting frame, two smoke hoods arranged above the supporting frame and a motor for driving the smoke hoods to rotate, and the motor is electrically connected with the smoke hoods. The recovery system disclosed by the utility model is high in automation degree, and can be used for recovering flue gas generated in anode assembly phosphorus pig iron casting; molten iron splashed in the casting process can be blocked through the arrangement of the smoke hood, and the risks of high-temperature scalding, fire disasters and the like can be greatly reduced; the rotating dust hood device can rotate according to the casting state of the phosphorus pig iron, opening and closing between the smoke hood and the dust removal system are achieved, and smoke overflow is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of dust removal, and particularly relates to a flue gas recovery system for the anode assembly phosphorus cast iron casting. Background Art

[0002] The anode assembly workshop mainly completes the work such as residual anode cleaning, pressure stripping, and new anode assembly. The new anode assembly consists of an anode steel claw group, an anode carbon block, and a phosphorus cast iron ring. After the pre-assembly of the anode steel claw group and the anode carbon block, there is a certain gap between the two. The phosphorus cast iron is melted by means of an intermediate frequency furnace, and then the molten phosphorus cast iron is poured into the gap reserved between the anode steel claw group and the anode carbon block. After cooling, it forms an integral body to complete the assembly process of the new anode.

[0003] During the pouring process of the phosphorus cast iron, since the pouring process is usually in an open state, the unorganized emission of dust is serious, interfering with the operation line of sight of the operator, seriously affecting the physical and mental health of the operator and the anode casting quality, and polluting the workshop environment. At the same time, there is often a situation of molten iron splashing during the pouring process, and the temperature of the molten iron is as high as over 1300 °C, posing risks such as high-temperature scalding and fire. Due to space and other conditions, it is difficult for the traditional dust removal system in this area to achieve a satisfactory dust collection effect.

[0004] Therefore, it is necessary to design a flue gas recovery system for the casting characteristics of the casting station to solve the above problems. Summary of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the utility model provides a flue gas recovery system for the anode assembly phosphorus cast iron casting to recover the flue gas generated during the anode assembly phosphorus cast iron casting.

[0006] The specific technical solutions are as follows:

[0007] A flue gas recovery system for the anode assembly phosphorus cast iron casting includes a dust removal system, a rotatable dust suction hood device, and a control system. The rotatable dust suction hood is connected to the dust removal system device; the flue gas is sucked into the dust removal system by means of the rotatable dust suction hood device and purified; the control system controls the dust removal system and the rotatable dust suction hood device through electrical connection. The rotatable dust suction hood device includes a support frame, two dust suction hoods arranged above the support frame, and a motor for driving the dust suction hood to rotate. The motor is mechanically connected to the dust suction hood.

[0008] The dust removal system includes a dust collector body, an induced draft fan arranged outside the dust collector body, and a flue pipe on the body connected to the rotatable dust suction hood device.

[0009] The support frame is formed by overlapping multiple layers of square tubes. An arc-shaped groove is installed above the square tube at the top layer, and the arc-shaped groove is fixedly connected to the square tube; a rectangular window is opened at the bottom of the arc-shaped groove, and a rectangular window with the same size is also opened at the top of the square tube corresponding to the rectangular window and is connected to the window at the bottom of the arc-shaped groove. One end of the square tube at the top layer is connected to a smoke pipe and is connected to the dust removal system through the smoke pipe.

[0010] At both ends of the arc-shaped groove, there are ear plates respectively. Coaxial shaft holes are provided on the two ear plates for installing the smoke hood, and the smoke hood is installed between the two ear plates through a fixed shaft.

[0011] An arc-shaped cylindrical surface is provided in the rotation area of the smoke hood. The arc-shaped cylindrical surface matches the arc-shaped groove described above, so that the smoke hood can rotate around the fixed shaft. A rectangular window is opened on the arc-shaped cylindrical surface, and the position and size are the same as those of the window at the arc-shaped groove.

[0012] A notch for cooperating with the guide rod steel claw assembly is provided on the inner side plate of the smoke hood, and the smoke hood can be tightly buckled on the cross beam of the guide rod steel claw assembly.

[0013] The shape of the smoke hood can be set according to the casting area to better cover the casting area. Multiple air holes for introducing flue gas are provided on the inner surface of the smoke hood.

[0014] The smoke hood, the square tube at the top layer, and the smoke pipe are all made of high-temperature resistant materials; the length of the smoke hood can be determined according to the length of the anode carbon block.

[0015] Two smoke hoods are integrally arranged, with a concave design in the middle. When they are buckled, they just won't touch the guide rod.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. The recovery system of the present utility model has a high degree of automation and can recover the flue gas generated during the casting of phosphorus cast iron in anode assembly.

[0018] 2. The rotating dust suction hood device is controlled by a control system and can rotate according to the casting state of phosphorus cast iron, automatically avoiding the movement of the anode.

[0019] 3. The setting of the smoke hood can block the splashing molten iron during the casting process and can greatly reduce the risks such as high-temperature burns and fires.

[0020] 4. The rotating dust suction hood device can rotate according to the casting state of phosphorus cast iron. This rotation can realize the opening and closing between the smoke hood and the dust removal system, preventing the overflow of flue gas. Description of the Drawings

[0021] Figure 1 It is the working principle diagram of a flue gas recovery system for phosphorus cast iron casting in anode assembly of the present utility model;

[0022] Figure 2 Schematic diagram of the connection relationship of a flue gas recovery system for phosphorus pig iron casting in anode assembly of the present utility model;

[0023] Figure 3 Schematic diagram of the structure of the rotatable dust suction hood device of the present utility model when in the dust suction state;

[0024] Figure 4 Schematic diagram of the structure of the rotatable dust suction hood device of the present utility model when not in the dust suction state;

[0025] Figure 5 Schematic diagram of the structure of the connection state between the hood and the flue of the present utility model;

[0026] Figure 6 Schematic diagram of the structure of the disconnection state between the hood and the flue of the present utility model;

[0027] Figure 7 Schematic diagram of the integrated structure of the hood of the present utility model;

[0028] Wherein, 1. Hood; 2. Arc-shaped groove; 3. Guide rod steel claw assembly; 4. Anode carbon block; 5. Roller conveyor; 6. Flue; 7. Arc-shaped cylindrical surface; 8. Flue opening; 9. Guide rod; 10. Steel claw; 11. Phosphorus pig iron. Specific embodiments

[0029] In order to better explain the present utility model for easy understanding, the technical solutions and effects of the present utility model will be described in detail below with reference to the accompanying drawings through specific embodiments.

[0030] The present embodiment adopts the following technical solutions: On the side of the phosphorus pig iron casting station in anode assembly, a flue gas recovery system for phosphorus pig iron casting in anode assembly is installed to realize the recovery of the flue gas generated during phosphorus pig iron casting.

[0031] Specifically, as Figure 1 、 Figure 2 shown, a flue gas recovery system for phosphorus pig iron casting in anode assembly includes a dust removal system, a rotatable dust suction hood device, and a control system; the rotatable dust suction hood is connected to the dust removal system device; the flue gas is sucked into the dust removal system by means of the rotatable dust suction hood device and purified; here, the dust removal system is fully realized by using existing technologies, and the control system is controlled by PLC and is electrically connected to the dust removal system and the rotatable dust suction hood device; the control system controls the working states of the rotatable dust suction hood device and the dust removal system. The dust removal system includes a dust collector body, an induced draft fan arranged outside the dust collector body, and a smoke pipe on the body connected to the rotatable dust suction hood device. The induced draft fan provides suction for the equipment. After the induced draft fan is started, the dust removal system generates negative pressure and sucks the flue gas into the dust removal system.

[0032] As Figure 3 shown, the rotatable dust suction hood device includes a support frame, two smoke hoods 1 arranged above the support frame, and a motor for driving the rotation of the smoke hood 1. The control system is electrically connected to the motor, and the motor is mechanically connected to the smoke hood 1. The support frame is formed by overlapping multiple layers of square pipes. The top layer of square pipes is mainly used to fix the smoke hood 1 and also serves as a flue. Specifically, as Figure 4 and Figure 5 shown, an arc-shaped groove 2 is installed above the top layer of square pipes. The arc-shaped groove 2 is welded to the square pipe. Each end of the arc-shaped groove 2 is provided with an ear plate, and the two ear plates are provided with coaxial shaft holes for installing the smoke hood 1. The smoke hood 1 is installed between the two ear plates through a fixed shaft. A rectangular window is opened at the bottom of the arc-shaped groove 2, and a rectangular window of the same size is also opened at the top of the corresponding square pipe and is connected to the window at the bottom of the arc-shaped groove 2. One end of the top layer of square pipes is connected to a smoke pipe and is connected to the smoke inlet 8 of the dust removal system through the smoke pipe.

[0033] As Figure 3 shown, in this embodiment, the assembly and casting of the anode are completed on the roller conveyor 5. The roller conveyor 5 is installed on the workshop floor and is used to convey the anode carbon block 4; above the corresponding anode carbon block 4, a suspension conveyor installed in the workshop is used to convey the guide rod steel claw assembly 3; the guide rod steel claw assembly 3 includes a steel claw 10 and a guide rod 9 fixedly connected to the steel claw; the guide rod steel claw assembly 3 is pre-installed in the reserved hole of the anode carbon block 4, and a gap is left between the guide rod steel claw assembly 3 and the wall of the reserved hole of the anode carbon block 4. When the molten phosphor iron 11 is poured into the gap and cooled, the guide rod steel claw assembly 3 and the anode carbon block 4 form an integral body, and the anode assembly is completed. A large amount of flue gas is generated during casting and is recovered by the rotatable dust suction hood.

[0034] As Figure 5 and Figure 6 shown, in this embodiment, an arc-shaped cylindrical surface 7 is provided in the rotation area of the smoke hood 1. The arc-shaped cylindrical surface 7 matches the arc-shaped groove 2, so that the smoke hood 1 can rotate around the fixed shaft; a notch for cooperating with the steel claw cross beam of the guide rod steel claw assembly 3 is provided on the inner side plate of the smoke hood 1. When the rotatable dust suction hood device is in the dust suction state, the smoke hood 1 can be tightly buckled on the cross beam of the guide rod steel claw assembly 3 to prevent the flue gas from overflowing and improve the dust suction effect; a rectangular window is opened on the arc-shaped cylindrical surface 7, which is the same as the window position and size at the arc-shaped groove 2, and can ensure that when the smoke hood 1 is in the dust suction state, the smoke hood 1 is in communication with the arc-shaped groove 2; so that the smoke hood 1 is in communication with the flue 6; when the smoke hood 1 is in the non-dust suction state, the smoke hood 1 is in a closed state with the arc-shaped groove 2, so that the smoke hood 1 is in a disconnected state from the flue 6.

[0035] In addition, in order to achieve a better dust suction effect, the shape of the smoke hood 1 can be set in coordination with the casting area to better cover the casting area; the length of the smoke hood 1 can be determined according to the length of the anode carbon block 4. For example, Figure 7 As shown, the two smoke hoods 1 are integrally arranged with a concave design in the middle. When they are buckled, they just won't touch the guide rod 9, thus avoiding the situation where they cannot be buckled, and achieving better effects of absorbing flue gas and preventing the splashing of molten iron.

[0036] A plurality of air holes for introducing flue gas are provided on the inner surface of the smoke hood 1. The flue gas is introduced through the air holes, flows into the flue through the rectangular window, and finally enters the dust removal system.

[0037] In this embodiment, the smoke hood 1, the top square pipe, and the smoke pipe are all made of high-temperature resistant materials.

[0038] The primary working process of the present utility model:

[0039] When the pre-assembled anode group reaches the casting station, a signal is sent to the control system through the proximity switch on the catenary of the catenary conveyor. After receiving the signal, the control system sends an instruction to the rotatable dust suction hood device. After receiving the instruction, the motor of the rotatable dust suction hood device drives the smoke hood 1 to rotate a certain angle until the smoke hood 1 just covers the casting area and enters the dust suction state. At this time, the anode group is started to be cast. The flue gas generated during casting enters the smoke hood 1 and flows into the dust removal system through the smoke pipe, thereby realizing the recovery and purification of flue gas. After casting is completed, the sensor on the smoke hood 1 senses that there is no flue gas and sends a signal to the control system. The control system sends an instruction to the dust suction hood device, and the dust suction hood rotates to the dust suction closed state and rotates back to the original state. The cast anode group leaves the casting station. After completing an anode assembly process, the next pre-assembled anode group will enter the casting station, and the control system will send a flue gas recovery instruction to the dust suction hood device, and the system will enter the next flue gas recovery operation cycle until all flue gas recovery operations are completed. The control system sends an instruction to the dust removal system to turn off the dust removal system.

Claims

1. A flue gas recovery system for anode assembly phosphorus pig iron casting, characterized by: It includes a dust removal system, a rotatable dust hood device and a control system, wherein the rotatable dust hood is connected to the dust removal system device; the smoke is sucked into the dust removal system and purified by means of the rotatable dust hood device; the control system controls the dust removal system and the rotatable dust hood device through electrical connection; The rotatable dust hood device includes a support frame, two smoke hoods arranged above the support frame, and a motor for driving the smoke hoods to rotate, and the motor is mechanically connected to the smoke hoods; The support frame is formed by overlapping multiple layers of square tubes, and an arc-shaped groove is arranged on the top of the square tube of the top layer, and the arc-shaped groove is fixedly connected to the square tube; a rectangular window is opened at the bottom of the arc-shaped groove, and a rectangular window of the same size is also opened on the top of the square tube corresponding to the rectangular window and is connected to the window at the bottom of the arc-shaped groove, and one end of the square tube of the top layer is connected to a smoke pipe and connected to the dust removal system through the smoke pipe; Two ends of the arc-shaped groove are respectively provided with ear plates, and coaxial shaft holes are provided on the two ear plates for installing the smoke hood. The smoke hood is installed between the two ear plates through a fixed shaft.

2. The fume recovery system for anode assembly phosphorus pig iron casting according to claim 1 is characterized in that: The dust removal system comprises a dust collector body, an induced draft fan arranged outside the dust collector body, and a smoke pipe on the body connected with a rotatable dust hood device.

3. The fume recovery system for anode assembly phosphorus pig iron casting according to claim 1 is characterized in that: The rotating area of ​​the smoke hood is provided with an arc-shaped cylinder, which matches the arc-shaped groove so that the smoke hood can rotate around a fixed axis. The arc-shaped cylinder has a rectangular window, which is consistent with the window position and size at the arc-shaped groove.

4. The fume recovery system for anode assembly phosphorus pig iron casting according to claim 3 is characterized in that: The inner side plate of the smoke hood is provided with a notch matched with the guide rod steel claw assembly, and the smoke hood can be tightly buckled on the crossbeam of the guide rod steel claw assembly.

5. The fume recovery system for anode assembly phosphorus pig iron casting according to claim 1 is characterized in that: The shape of the smoke hood can be arranged to match the casting area so as to better cover the casting area. The inner surface of the smoke hood is provided with a plurality of air holes for introducing smoke.

6. The fume recovery system for anode assembly phosphorus pig iron casting according to claim 1 is characterized in that: The smoke hood, the square tube on the top layer and the smoke pipe are all made of high temperature resistant materials; the length of the smoke hood can be determined according to the length of the anode carbon block.

7. The fume recovery system for anode assembly phosphorus pig iron casting according to claim 1 is characterized in that: The two smoke hoods are integrated with a recessed design in the middle, so that when they are buckled together, they just do not touch the guide rod.

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