Compensation device for large sintering flue and dust falling pipe

Abstract

The invention relates to a compensation device for a large sintering flue and dust fall pipes, which comprises the large flue, a large flue compensator, a fixed support, a moving trolley, the dust fall pipes and a dust fall pipe compensator, the dust fall pipes are respectively arranged below each air bellow on a sintering machine, a fixed point is arranged below the sintering machine, all the dust fall pipes are connected with the large flue, and the large flue compensator is connected with the moving trolley. The large flue is divided into a plurality of sections, the sections of the large flue are connected by arranging large flue compensators, a plurality of moving trolleys are arranged at the bottom of the large flue between the large flue compensators, a fixing support is arranged at the bottom of the large flue, and a dust falling pipe compensator is arranged in the middle of an upper pipeline of the dust falling pipe. The method has the beneficial effects that all deformation of the large flue and the dust falling pipe due to temperature change of internal media is compensated, the air leakage rate of a sintering system is reduced, the sintering main pumping load is reduced, energy is saved, and the sintering production cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of large flue and dust suppression pipe compensation, and in particular to a sintered large flue and dust suppression pipe compensation device. Background Art

[0002] The sintering flue is a pipe made of carbon steel. It is composed of pipe sections of different sizes according to the different flue gas flow rates. It is located below the sintering machine and arranged parallel to the sintering machine. It is connected to the sintering machine bellows through a dust suppression pipe made of carbon steel. When the sintering machine is in production, the sintering machine expands due to the heat. At the same time, the high-temperature flue gas generated by sintering will enter the flue through the dust suppression pipe, causing the dust suppression pipe and the flue to expand due to the heat. When the sintering machine stops production, the sintering machine, the dust suppression pipe, and the flue naturally cool and shrink. At present, the deformation caused by thermal expansion and contraction is absorbed by setting expansion joints on the sintering machine body, compensators between the bellows and the dust suppression pipe, and expansion joints on the flue to protect the equipment and pipelines from damage.

[0003] There are many deficiencies in the existing thermal expansion and contraction compensation technology for large flues and dust suppression pipes, including: 1) The expansion joints of large flues cannot completely absorb the deformation of the pipes, causing damage to the expansion joints and air leakage: the size of the expansion joints set in the large flues is limited. When the medium temperature (high-temperature flue gas or normal-temperature air) in the large flues changes, the deformation of the large flues due to thermal expansion or contraction will exceed the size of the expansion joints, causing damage to the expansion joints of the large flues and air leakage, resulting in a larger air leakage rate in the sintering system, an increase in the main extraction load of sintering, energy waste, and increased sintering production costs; 2) The compensator cannot completely absorb the accumulated deformation at various locations, causing damage to the compensator and air leakage: the compensator is set between the sintering machine bellows and the dust suppression pipe, with limited size and small compensation. When the medium temperature (high-temperature flue gas or normal-temperature air) changes, the sintering machine, dust suppression pipe, and large flue are deformed due to thermal expansion or contraction, and both ends of the compensator are deformed accordingly. The compensation amount of the compensator set at the bottom of the bellows is difficult to meet the accumulated deformation at various locations. 3) There is only one fixing point for the sintering machine, while there are multiple fixing points for the large flue. The large flue cannot compensate for the displacement deformation, causing the deformation directions of the two ends of the compensator to be opposite at some positions. The accumulated deformation is greater, exceeding the compensation amount of the compensator, causing damage to the compensator, and ultimately leading to a larger air leakage rate in the sintering system and an increase in the main exhaust load of the sintering, resulting in energy waste and increased sintering production costs. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a compensation device for a sintering large flue and a dust suppression pipe. The large flue is divided into sections, a large flue compensator is arranged between each section of the large flue, and a large compensation dust suppression pipe compensator is arranged on the dust suppression pipe to compensate for all deformations of the large flue and the dust suppression pipe caused by changes in the internal medium temperature. The air leakage rate of the sintering system is reduced, the main exhaust load of the sintering is reduced, energy is saved, and the sintering production cost is reduced.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A compensation device for a sintering large flue and a dust suppression pipe comprises a large flue, a large flue compensator, a fixed bracket, a mobile trolley, a dust suppression pipe, and a dust suppression pipe compensator. The dust suppression pipes are respectively arranged under each wind box on the sintering machine, a fixed point is arranged under the sintering machine, all dust suppression pipes are connected to the large flue, the large flue is divided into several sections, each section of the large flue is connected by setting a large flue compensator, several mobile trolleys are arranged at the bottom of the large flue between the large flue compensators, a fixed bracket is arranged at the bottom of the large flue, and a dust suppression pipe compensator is arranged in the middle of the upper pipe of the dust suppression pipe.

[0007] Furthermore, the large flue compensator adopts a bellows compensator.

[0008] Furthermore, the large flue compensator adopts a flange sleeve compensator.

[0009] Furthermore, the dust suppression pipe compensator adopts a bellows compensator.

[0010] Furthermore, the dust suppression pipe compensator adopts a flange sleeve compensator.

[0011] Furthermore, the dust suppression pipe compensator adopts a compensator with a large size compensation amount.

[0012] Furthermore, the horizontal position of the fixed bracket is the same as the horizontal position of the fixed point of the sintering machine.

[0013] Furthermore, the specific steps of the compensation method of the compensation device of the sintering large flue and the dust suppression pipe are as follows:

[0014] S1. When the sintering machine is in production, the high-temperature flue gas generated by sintering enters the dust suppression pipe and the large flue through the bellows under the sintering machine. The sintering machine, the dust suppression pipe and the large flue are all heated and expand. The sintering machine is provided with expansion joints on both sides of the fixed point to eliminate the deformation caused by its own expansion. The large flue is divided into sections, and a large flue compensator is provided between each section of the large flue. The large flue compensator has a large axial and radial compensation function and can absorb the deformation caused by the thermal expansion of the large flue. At the same time, an anti-corrosion and wear-resistant coating or lining is provided inside the large flue compensator to ensure that the large flue compensator works normally without damage when the flue gas passes through;

[0015] S2. A fixed bracket and multiple mobile trolleys are set under the large flue to ensure the support of the large flue and the large flue compensator. The position of the fixed bracket is the same as the horizontal position of the fixed point of the sintering machine to ensure that the large flue and the sintering machine expand in the same direction when heated and produce the same direction of deformation.

[0016] S3. The mobile trolley is composed of a bracket and a moving wheel. The bracket is welded and fixed to the large flue. The moving wheel has axial and radial movement functions. When the large flue compensator compensates for deformation, it can move freely to compensate for the displacement deformation;

[0017] S4. The upper end of the dust suppression pipe is connected to the lower port of the wind box of the sintering machine, and the lower end is connected to the upper part of the large flue to ensure that the sintering flue gas enters the large flue from the sintering machine. A large-size dust suppression pipe compensator with large compensation is set in the middle and upper part of the dust suppression pipe. It has large axial and radial compensation functions and can absorb the same-direction deformation caused by the thermal expansion of the large flue and the sintering machine. At the same time, an anti-corrosion and wear-resistant coating or lining is set inside the dust suppression pipe compensator to ensure that the dust suppression pipe compensator works normally without damage when the flue gas passes through;

[0018] S5. When the sintering machine stops production, the sintering machine, dust suppression pipe and large flue are naturally cooled in the air at room temperature and shrink and deform. The deformation is absorbed by the expansion joint of the sintering machine body, the sintering large flue compensator and the dust suppression pipe compensator respectively.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1) Multiple flue compensators are installed in the flue to completely absorb the deformation caused by thermal expansion and contraction of the flue, ensure the integrity of the compensation device, and reduce the air leakage rate of the sintering system: fixed brackets and mobile trolleys are used as flue compensation devices. When the flue compensator compensates for deformation, it can move freely to compensate for the displacement deformation, ensuring that all deformations of the flue caused by changes in the internal medium temperature (high-temperature flue gas or normal-temperature air) are completely absorbed, the air leakage rate of the sintering system is reduced, the main exhaust load of sintering is reduced, energy is saved, and the sintering production cost is reduced.

[0021] 2) Cancel the compensator under the bellows, and add a new large-size compensation dust suppression pipe compensator in the middle and upper part of the dust suppression pipe to increase the compensation amount to compensate for the accumulated deformation in various places, ensure that the dust suppression pipe compensator completely absorbs the accumulated deformation in various places, ensure that the compensation device is intact, and reduce the air leakage rate of the sintering system.

[0022] 3) The original multiple fixing points of the flue are cancelled, and only one fixing bracket is set at the same horizontal position as the fixing point of the sintering machine. The positions of the flue compensator and the mobile trolley are reasonably arranged so that the deformation directions of the fixing points of the sintering machine and the flue are the same, and both ends of the dust suppression pipe compensation device are also deformed in the same direction, which reduces the accumulated deformation and ensures that the compensation device is not damaged. The air leakage rate of the sintering system is reduced, the main exhaust load of the sintering is reduced, energy is saved, and the sintering production cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of a compensation device for a sintering large flue and a dust suppression pipe according to the present invention.

[0024] In the figure: 1. Large flue; 2. Large flue compensator; 3. Fixed bracket; 4. Mobile trolley; 5. Dust reduction pipe; 6. Dust reduction pipe compensator; 7. Sintering machine; 8. Bellows; 9. Fixed point; 10. Air; 11. Flue gas. DETAILED DESCRIPTION

[0025] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0026] like Figure 1 As shown, the working principle of a compensation device for a sintering large flue and dust suppression pipe is as follows: when sintering is in production or stopped, the sintering machine 7, dust suppression pipe 5, and large flue 1 will expand and contract due to changes in the internal medium temperature (high-temperature flue gas or normal-temperature air). By setting a large flue compensator 2, a fixed bracket 3, and a mobile trolley 4 on the large flue 1 and arranging their positions reasonably, the deformation of the large flue is completely absorbed; at the same time, the original compensator of the dust suppression pipe 5 is cancelled, and a large-sized dust suppression pipe compensator 6 is added to increase the compensation amount, and its position is adjusted from the bottom of the bellows 8 to the middle and upper part of the dust suppression pipe 5, so as to completely absorb the accumulated deformation in various places; ensure that the main body of the large flue 1 and the dust suppression pipe 5 and the corresponding compensation device are not damaged, the air leakage rate of the sintering system is reduced, the main exhaust load of the sintering is reduced, energy is saved, and the sintering production cost is reduced.

[0027] [Example 1] Figure 1 As shown, a compensation device for a sintering large flue and a dust suppression pipe comprises a large flue 1, a large flue compensator 2, a fixed bracket 3, a movable trolley 4, a dust suppression pipe 5, and a dust suppression pipe compensator 6. The dust suppression pipes 5 are respectively arranged under each wind box 8 on a sintering machine 7, a fixed point 9 is arranged under the sintering machine 7, all dust suppression pipes 5 are connected to the large flue 1, the large flue 1 is divided into several sections, each section of the large flue 1 is connected by setting a large flue compensator 2, several movable trolleys 4 are arranged at the bottom of the large flue between the large flue compensators 2, a fixed bracket 3 is arranged at the bottom of the large flue 1, and the horizontal position of the fixed bracket 3 is the same as the horizontal position of the fixed point 9 of the sintering machine, and a dust suppression pipe compensator 6 is arranged in the middle of the upper pipe of the dust suppression pipe 5; the large flue compensator 2 adopts a bellows compensator, and the dust suppression pipe compensator 6 adopts a large-size compensation bellows compensator.

[0028] [Example 2] Figure 1As shown, a compensation device for a sintering large flue and a dust suppression pipe comprises a large flue 1, a large flue compensator 2, a fixed bracket 3, a movable trolley 4, a dust suppression pipe 5, and a dust suppression pipe compensator 6. The dust suppression pipes 5 are respectively arranged under each wind box 8 on a sintering machine 7, a fixed point 9 is arranged under the sintering machine 7, all dust suppression pipes 5 are connected to the large flue 1, the large flue 1 is divided into several sections, each section of the large flue 1 is connected by setting a large flue compensator 2, several movable trolleys 4 are arranged at the bottom of the large flue between the large flue compensators 2, a fixed bracket 3 is arranged at the bottom of the large flue 1, and the horizontal position of the fixed bracket 3 is the same as the horizontal position of the fixed point 9 of the sintering machine, and a dust suppression pipe compensator 6 is arranged in the middle of the upper pipe of the dust suppression pipe 5; the large flue compensator 2 adopts a bellows compensator, and the dust suppression pipe compensator 6 adopts a large-size compensation flange sleeve compensator.

[0029] [Example 3] Figure 1 As shown, a compensation device for a sintering large flue and a dust suppression pipe comprises a large flue 1, a large flue compensator 2, a fixed bracket 3, a movable trolley 4, a dust suppression pipe 5, and a dust suppression pipe compensator 6. The dust suppression pipes 5 are respectively arranged under each wind box 8 on a sintering machine 7, a fixed point 9 is arranged under the sintering machine 7, all dust suppression pipes 5 are connected to the large flue 1, the large flue 1 is divided into several sections, each section of the large flue 1 is connected by setting a large flue compensator 2, several movable trolleys 4 are arranged at the bottom of the large flue between the large flue compensators 2, a fixed bracket 3 is arranged at the bottom of the large flue 1, and the horizontal position of the fixed bracket 3 is the same as the horizontal position of the fixed point 9 of the sintering machine, and a dust suppression pipe compensator 6 is arranged in the middle of the upper pipe of the dust suppression pipe 5; the large flue compensator 2 adopts a flange sleeve compensator, and the dust suppression pipe compensator 6 adopts a large-size compensation bellows compensator.

[0030] [Example 4] Figure 1 As shown, a compensation device for a sintering large flue and a dust suppression pipe comprises a large flue 1, a large flue compensator 2, a fixed bracket 3, a movable trolley 4, a dust suppression pipe 5, and a dust suppression pipe compensator 6. The dust suppression pipes 5 are respectively arranged under each wind box 8 on a sintering machine 7, a fixed point 9 is arranged under the sintering machine 7, all dust suppression pipes 5 are connected to the large flue 1, the large flue 1 is divided into several sections, each section of the large flue 1 is connected by setting a large flue compensator 2, several movable trolleys 4 are arranged at the bottom of the large flue between the large flue compensators 2, a fixed bracket 3 is arranged at the bottom of the large flue 1, and the horizontal position of the fixed bracket 3 is the same as the horizontal position of the fixed point 9 of the sintering machine, and a dust suppression pipe compensator 6 is arranged in the middle of the upper pipe of the dust suppression pipe 5; the large flue compensator 2 adopts a flange sleeve compensator, and the dust suppression pipe compensator 6 adopts a large-size compensation flange sleeve compensator.

[0031] The specific steps of the compensation method of the compensation device for the sintering flue and the dust suppression pipe described in Examples 1-4 are as follows:

[0032] S1. When the sintering machine is in production, the high-temperature flue gas 11 generated by sintering enters the dust suppression pipe 5 and the large flue 1 through the bellows 8 under the sintering machine 7. The sintering machine 7, the dust suppression pipe 5 and the large flue 1 are all heated and expand. The sintering machine 7 is provided with expansion joints on both sides of the fixed point 9 to eliminate the deformation caused by its own expansion. The large flue 1 is divided into sections, and a large flue compensator 2 is provided between each section of the large flue 1. The large flue compensator 2 has a large axial and radial compensation function, and can absorb the deformation caused by the thermal expansion of the large flue 1. At the same time, an anti-corrosion and wear-resistant coating or lining is provided inside the large flue compensator 2 to ensure that the large flue compensator 2 works normally without damage when the flue gas 11 passes through;

[0033] S2. A fixed bracket 3 and multiple movable trolleys 4 are arranged below the large flue 1 to ensure the support of the large flue 1 and the large flue compensator 2. The position of the fixed bracket 3 is the same as the horizontal position of the fixed point 9 of the sintering machine 7 to ensure that the large flue 1 and the sintering machine 7 expand in the same direction when heated and produce the same direction of deformation.

[0034] S3. The mobile trolley 4 is composed of a bracket and a moving wheel, the bracket is welded and fixed to the large flue 1, and the moving wheel has axial and radial movement functions, and can move freely to compensate for the displacement deformation when the large flue compensator 2 compensates for deformation;

[0035] S4. The upper end of the dust removal pipe 5 is connected to the lower opening of the wind box 8 of the sintering machine 7, and the lower end is connected to the upper part of the large flue 11, so as to ensure that the sintered flue gas 11 enters the large flue 1 from the sintering machine 7. A dust removal pipe compensator 6 with a large size compensation amount is arranged in the middle and upper part of the dust removal pipe 5, which has a large axial and radial compensation function and can absorb the same-direction deformation caused by the thermal expansion of the large flue 1 and the sintering machine 7. At the same time, an anti-corrosion and wear-resistant coating or lining is arranged inside the dust removal pipe compensator 6 to ensure that the dust removal pipe compensator 6 works normally without being damaged when the flue gas 11 passes through;

[0036] S5. When the sintering machine stops production, the sintering machine 7, the dust suppression pipe 5, and the large flue 1 are naturally cooled in the room temperature air 10 and shrink and deform. The deformation is absorbed by the expansion joint of the sintering machine 1, the large flue compensator 2, and the dust suppression pipe compensator 6 respectively.

[0037] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A compensation device for a sintering flue and dust suppression pipe, comprising a flue, a flue compensator, a fixed bracket, a mobile trolley, a dust suppression pipe, and a dust suppression pipe compensator. The dust suppression pipes are respectively arranged under each wind box on the sintering machine, a fixed point is arranged under the sintering machine, and all dust suppression pipes are connected to the flue, characterized in that: The large flue is divided into several sections, each section of the large flue is connected by a large flue compensator, several mobile trolleys are arranged at the bottom of the large flue between the large flue compensators, a fixed bracket is arranged at the bottom of the large flue, and a dust reduction pipe compensator is arranged in the middle of the upper pipe of the dust reduction pipe.

2. A compensation device for a sintering flue and a dust suppression pipe according to claim 1, characterized in that: The large flue compensator is a bellows compensator.

3. A compensation device for a sintering flue and a dust suppression pipe according to claim 1, characterized in that: The large flue compensator is a flange sleeve compensator.

4. A compensation device for a sintering flue and a dust suppression pipe according to claim 1, characterized in that: The dust suppression pipe compensator is a bellows compensator.

5. The compensation device for the sintering flue and dust suppression pipe according to claim 1 is characterized in that: The dust suppression pipe compensator adopts a flange sleeve compensator.

6. A compensation device for a sintering flue and a dust suppression pipe according to claim 1, 4 or 5, characterized in that: The dust suppression pipe compensator adopts a compensator with a large size and compensation amount.

7. The compensation device for the sintering flue and dust suppression pipe according to claim 1 is characterized in that: The horizontal position of the fixed bracket is the same as the horizontal position of the fixed point of the sintering machine.

8. The compensation method for the compensation device of the sintering flue and dust suppression pipe according to claim 1 is characterized in that: The specific steps of the compensation method of the compensation device of the sintering large flue and the dust suppression pipe are as follows: S1. When the sintering machine is in production, the high-temperature flue gas generated by sintering enters the dust suppression pipe and the large flue through the bellows under the sintering machine. The sintering machine, the dust suppression pipe and the large flue are all heated and expand. The sintering machine is provided with expansion joints on both sides of the fixed point to eliminate the deformation caused by its own expansion. The large flue is divided into sections, and a large flue compensator is provided between each section of the large flue. The large flue compensator has a large axial and radial compensation function and can absorb the deformation caused by the thermal expansion of the large flue. At the same time, an anti-corrosion and wear-resistant coating or lining is provided inside the large flue compensator to ensure that the large flue compensator works normally without damage when the flue gas passes through; S2. A fixed bracket and multiple mobile trolleys are set under the large flue to ensure the support of the large flue and the large flue compensator. The position of the fixed bracket is the same as the horizontal position of the fixed point of the sintering machine to ensure that the large flue and the sintering machine expand in the same direction when heated and produce the same deformation; S3. The mobile trolley is composed of a bracket and a moving wheel. The bracket is welded and fixed to the large flue. The moving wheel has axial and radial movement functions. When the large flue compensator compensates for deformation, it can move freely to compensate for the displacement deformation; S4. The upper end of the dust suppression pipe is connected to the lower port of the wind box of the sintering machine, and the lower end is connected to the upper part of the large flue to ensure that the sintering flue gas enters the large flue from the sintering machine. A large-size dust suppression pipe compensator with large compensation is set in the middle and upper part of the dust suppression pipe. It has large axial and radial compensation functions and can absorb the same-direction deformation caused by the thermal expansion of the large flue and the sintering machine. At the same time, an anti-corrosion and wear-resistant coating or lining is set inside the dust suppression pipe compensator to ensure that the dust suppression pipe compensator works normally without damage when the flue gas passes through; S5. When the sintering machine stops production, the sintering machine, dust suppression pipe and large flue are naturally cooled in the air at room temperature and shrink and deform. The deformation is absorbed by the expansion joint of the sintering machine body, the sintering large flue compensator and the dust suppression pipe compensator respectively.

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