Air curtain air seal device for sulfur dioxide flue gas overflow of rotary side-blown converter

Abstract

The utility model discloses a sulfur dioxide flue gas overflow air curtain air seal device of a rotary side-blown converter, and belongs to the technical field of air curtain machines. The air curtain air sealing device body (1) is fixedly connected between the two sealing end covers (4), the screw set screws (2) are fixedly connected between the two sealing end covers (4), the screw set screws (2) are provided with matched screw set nuts (3), and an air curtain air sealing device cavity is defined by the air curtain air sealing device body (1) and the sealing end covers (4). According to the air curtain air sealing device, the first-stage steady flow barrel and the second-stage steady flow barrel are additionally arranged, barrel-imitating grooves matched with the end face of the first-stage steady flow barrel, the end face of the second-stage steady flow barrel and the end face of the air curtain air sealing device body are designed in the inner surfaces of the sealing end covers, and the high-temperature-resistant sealant is additionally arranged on the inner surfaces of the two sealing end covers; according to the air curtain air seal device, the air flow in the air curtain air seal device is more uniform, so that the sealing effect of the air curtain air seal device on sulfur dioxide flue gas overflow is greatly improved, the flutter phenomenon caused by vortex and the deformation of the air curtain air seal device body are eliminated, and the problems of poor sealing performance and the deformation of the air curtain air seal device body caused by assembly are effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air curtain machines, in particular to an air curtain air sealing device for preventing sulfur dioxide smoke generated by a rotary side-blowing furnace from overflowing. Background Art

[0002] The air curtain machine is an air purification device that uses a high-speed motor to drive a crossflow or centrifugal fan to generate a strong airflow to form an "invisible curtain". It is also called an air curtain machine, air curtain, air air curtain machine, wind gate, air door, which can effectively isolate dust, smoke, odor, insects and microorganisms.

[0003] In order to effectively suppress the overflow of sulfur dioxide fume, the wind curtain gas sealing device has become an important process equipment for safe production, and it is of great significance to the environmental protection of the site. In the metallurgical production process, when the quartz stone solvent is added through the chute during the blowing and slagging of the rotary side-blown furnace, the chute is in an open state. In this case, part of the sulfur dioxide fume generated by blowing will escape from the open chute mouth. If an air curtain gas sealing device is added above the chute discharge port, the sulfur dioxide fume will be blocked by the wind curtain generated by compressed gas and blown back into the furnace, so that the sulfur dioxide fume is discharged along the ascending flue, which can effectively suppress the overflow of sulfur dioxide fume.

[0004] At present, metallurgical and chemical enterprises usually add air curtain gas sealing devices above the chute discharge port as follows Figure 1 As shown, the device is composed of a wind curtain air sealing device body, a sealing end cover, a screw rod of a screw rod group, a screw rod nut, an outlet adjustment pressure plate fixing bolt, an outlet adjustment pressure plate positioning adjustment screw and an outlet adjustment pressure plate. The wind curtain air sealing device has two sealing end covers, one of which has an air inlet, that is, the wind curtain air sealing device has a single-side air inlet structure, the wind curtain air sealing device body is fixedly connected between the two sealing end covers, and the screw rod of the screw rod group is fixedly connected between the two sealing end covers, and the screw rod of the screw rod group has a matching screw rod nut, and the wind curtain air sealing device body and the sealing end cover are enclosed to form a wind curtain air sealing device cavity, and the wind curtain air sealing device cavity is hollow; the wind curtain air sealing device body is as shown in Figure 2 As shown in 1, it is a combination of a partial cylindrical structure and a duckbill structure. A wind curtain opening is formed between the upper lip and the lower lip of the air curtain air sealing device body. The outlet adjustment pressure plate is fixedly connected above the upper lip edge of the air curtain air sealing device body. Figure 1 As shown, both ends of the outlet regulating pressure plate are fixedly connected to the sealing end cover; a plurality of outlet regulating pressure plate positioning adjustment screws are fixed on the outlet regulating pressure plate, and the outlet regulating pressure plate positioning adjustment screws cooperate with the outlet regulating pressure plate to enable the upper lip edge to move longitudinally toward the lower lip edge to adjust the size of the air curtain opening, so that the gas is in a laminar flow form to keep the chute box in a completely closed state.

[0005] But if Figure 1The wind curtain air seal device shown has some technical problems that affect the effective suppression of sulfur dioxide flue gas spillage. First, the wind curtain air seal device is a single-sided air inlet structure in structure, which causes a large area of ​​vortex to appear inside the chamber away from the air inlet. The air inlet has a fast gas flow rate and low pressure, which makes the air flow distribution at the air outlet uneven. This can only block about 65% of the sulfur dioxide spillage and cannot achieve a complete sealing effect. Second, due to the influence of the on-site working environment, the wind curtain air seal device will cause a certain amount of deformation and flutter due to heat. Third, due to the influence of the assembly process, since the sealing end cover is a planar structure, the wind curtain air seal device body will shake due to different bolt tightening forces during each assembly process, resulting in poor sealing effect of the wind curtain air seal device cavity and deformation of the wind curtain air seal device body. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide an air curtain air sealing device with good sealing effect of the cavity, more stable structural rigidity, no flutter and deformation of the air curtain air sealing device body, and efficient suppression of sulfur dioxide fume overflow.

[0007] In order to solve the above technical problems, the utility model provides a rotary side-blown furnace sulfur dioxide flue gas overflow wind curtain air sealing device, including an wind curtain air sealing device body, a screw group screw, a screw group nut, a sealing end cover, an outlet adjustment pressure plate fixing bolt, an outlet adjustment pressure plate positioning adjustment screw, an outlet adjustment pressure plate, a secondary flow stabilizing cylinder, a primary flow stabilizing cylinder, and a high temperature resistant sealing rubber layer.

[0008] Compared with the aforementioned prior art, the utility model provides a rotary side-blown furnace sulfur dioxide flue gas overflow wind curtain air sealing device with the following improvements: a primary flow stabilizing cylinder and a secondary flow stabilizing cylinder are added, and both ends of the primary flow stabilizing cylinder, the secondary flow stabilizing cylinder and the wind curtain air sealing device body are respectively fixedly connected to the inner surfaces of the two sealing end covers, the primary flow stabilizing cylinder is located in the center, the secondary flow stabilizing cylinder is located outside the primary flow stabilizing cylinder, and the wind curtain air sealing device body is located outside the secondary flow stabilizing cylinder, and there are gaps between the primary flow stabilizing cylinder and the secondary flow stabilizing cylinder, and between the secondary flow stabilizing cylinder and the wind curtain air sealing device body; the two sealing end covers both have air inlets, changing from single-sided air inlet to double-sided air inlet; the inner surfaces of the sealing end covers have imitation cylinder grooves that match the end faces of the primary flow stabilizing cylinder, the secondary flow stabilizing cylinder, and the wind curtain air sealing device body, and the two sealing end covers are symmetrical on the left and right; the inner surfaces of the two sealing end covers, including the inner surfaces of the imitation cylinder grooves, are lined with a high-temperature resistant sealant layer.

[0009] The first-stage flow stabilizing cylinder is a rigid cylinder A with an air outlet A. The front view of the first-stage flow stabilizing cylinder is as follows: Figure 3As shown, the width of the middle part of the air outlet A is the smallest, and the width of the two end parts of the air outlet A is the largest. The central angle corresponding to the cross-section of the air outlet of the first-level flow stabilizing cylinder 9 is less than 180°.

[0010] The secondary flow stabilizing cylinder comprises two parts, one part is a rigid cylinder B with an air outlet B, and the other part is a rigid ridge fixed on the cylinder B, such as Figure 4 As shown, the ridge is on the outside of the cylinder B opposite to the air outlet B, and the cross section of the secondary flow stabilizing cylinder is symmetrical, as shown in Figure 5 shown.

[0011] The cylindrical parts of the primary flow stabilizing cylinder, the secondary flow stabilizing cylinder and the air curtain air sealing device body are coaxial.

[0012] Preferably, the number of screws in the screw group is 5.

[0013] The utility model discloses a rotary side-blown furnace sulfur dioxide flue gas overflow wind curtain air sealing device, which adopts air intake at both ends and installs a flow stabilizing cylinder to form a structure with three chambers and two flow stabilizing grooves, so that the air flow inside the wind curtain air sealing device is more uniform, thereby greatly improving the sealing effect of the wind curtain air sealing device on the overflow of sulfur dioxide flue gas, and eliminating the flutter phenomenon caused by eddy current and the deformation of the wind curtain air sealing device body. By adding a cylinder structure groove on the inner side of the sealing end cover and lining it with a high-temperature resistant sealant layer, the poor sealing and deformation of the wind curtain air sealing device body caused by assembly are effectively solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0015] Figure 1 It is a schematic diagram of the structure of an air curtain air sealing device in the prior art.

[0016] Figure 2 This is a schematic diagram of the components of a rotary side-blown furnace sulfur dioxide flue gas overflow air curtain gas sealing device of the utility model

[0017] Figure 3 This is a front view of the first-stage steady flow cylinder of a rotary side-blowing furnace sulfur dioxide flue gas overflow air curtain gas sealing device of the utility model

[0018] Figure 4 This is a side view of the secondary flow stabilizing cylinder of a rotary side-blowing furnace sulfur dioxide flue gas overflow air curtain gas sealing device of the utility model

[0019] Figure 5 This is a cross-sectional view of the secondary flow stabilizing cylinder of a rotary side-blowing furnace sulfur dioxide flue gas overflow air curtain gas sealing device of the utility model.

[0020] In the figure, 1-air curtain air sealing device body, 2-screw of screw group, 3-nut of screw group, 4-sealing end cover, 5-outlet adjusting pressure plate fixing bolt, 6-outlet adjusting pressure plate positioning adjusting screw, 7-outlet adjusting pressure plate, 8-secondary stabilizing cylinder, 9-primary stabilizing cylinder, 10-high temperature resistant sealing rubber layer, 11-ridge piece. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be clearly and completely described below through specific examples. Those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in this specification. The utility model can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0022] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention, and thus the drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0023] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, horizontal, vertical...) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0024] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of the present invention may actually be an approximately parallel relationship, and the vertical relationship may actually be an approximately vertical relationship.

[0025] Example

[0026] like Figure 2The rotary side-blown furnace sulfur dioxide flue gas overflow wind curtain air sealing device shown in the figure includes a wind curtain air sealing device body 1, a screw group screw 2, a screw group nut 3, a sealing end cover 4, an outlet adjustment pressure plate fixing bolt 5, an outlet adjustment pressure plate positioning adjustment screw 6, an outlet adjustment pressure plate 7, a secondary flow stabilizing cylinder 8, a primary flow stabilizing cylinder 9, and a high-temperature resistant sealing rubber layer 10. The primary flow stabilizing cylinder 9, the secondary flow stabilizing cylinder 8, and the wind curtain air sealing device body 1 are respectively fixedly connected at both ends to the inner surfaces of the two sealing end covers 4, the primary flow stabilizing cylinder 9 is located in the center, the secondary flow stabilizing cylinder 8 is located on the outside of the primary flow stabilizing cylinder 9, and the wind curtain air sealing device body 1 is located on the outside of the secondary flow stabilizing cylinder 8. There are gaps between the primary flow stabilizing cylinder 9 and the secondary flow stabilizing cylinder 8, and between the secondary flow stabilizing cylinder 8 and the wind curtain air sealing device body 1; five screw group screws 2 are fixedly connected between the two sealing end covers 4, and the screw group screws 2 have matching screw group nuts 3. Each sealing end cover 4 has an air inlet, which changes from a single-sided air inlet to a double-sided air inlet; the inner surface of the sealing end cover 4 has an imitation cylinder groove that matches the end face of the first-level stabilizing cylinder 9, the end face of the second-level stabilizing cylinder 8, and the end face of the wind curtain air sealing device body 1, and the two sealing end covers 4 are symmetrical on the left and right; the inner surfaces of the two sealing end covers 4, including the inner surface of the imitation cylinder groove, are lined with a high-temperature resistant sealant layer 10, and the thickness of the high-temperature resistant sealant layer 10 is 2mm; a wind curtain opening is formed between the upper lip and the lower lip of the air outlet of the wind curtain air sealing device body 1, and the outlet regulating pressure plate 7 is fixedly connected to the upper lip of the wind curtain air sealing device body 1, and the two ends of the outlet regulating pressure plate 7 are respectively fixedly connected to the two sealing end covers 4; three outlet regulating pressure plate positioning adjustment screws 6 are fixed on the outlet regulating pressure plate 7, and the outlet regulating pressure plate positioning adjustment screws 6 cooperate with the outlet regulating pressure plate 7 to make the upper lip move toward the lower lip along the longitudinal direction to adjust the size of the wind curtain opening,

[0027] The first-level flow stabilizing cylinder 9 is a steel cylinder A with an air outlet A, with a wall thickness of 5 mm. The length of the middle part of the air outlet A is 1 / 3 of the vertical length of the cylinder side wall, and the length of the two end parts of the air outlet A is 1 / 3 of the vertical length of the cylinder side wall. In the cross section of the first-level flow stabilizing cylinder 9, the central angle corresponding to the middle part of the air outlet A is 10°, and the central angle corresponding to the two end parts of the air outlet A is 20°.

[0028] The secondary flow stabilizing cylinder 8 includes two parts, one part is a rigid cylinder B with an air outlet B, and the other part is a rigid ridge 11 fixed on the cylinder B. The ridge is on the outside of the cylinder B opposite to the air outlet B. The cross section of the secondary flow stabilizing cylinder is bilaterally symmetrical.

[0029] The cylindrical parts of the primary flow stabilizing cylinder 9, the secondary flow stabilizing cylinder 8 and the air curtain air sealing device body 1 are coaxial.

[0030] The depth of the cylinder-like groove is 5 mm.

Claims

1. A rotary side-blown furnace sulfur dioxide flue gas overflow air curtain gas sealing device, comprising an air curtain gas sealing device body (1), a screw rod of a screw rod group (2), a screw rod nut (3), a sealing end cover (4), an outlet adjustment pressure plate fixing bolt (5), an outlet adjustment pressure plate positioning adjustment screw (6), and an outlet adjustment pressure plate (7), wherein the air curtain gas sealing device body (1) is fixedly connected between two sealing end covers (4), the screw rod of the screw rod group (2) is fixedly connected between the two sealing end covers (4), the screw rod of the screw rod group (2) has a matching screw rod nut (3), and the air curtain gas sealing device body (1) and the sealing end cover (4) are fixedly connected between the two sealing end covers (4). The air curtain air sealing device cavity is enclosed between the air outlet upper lip and the lower lip of the air curtain air sealing device body (1), and an air curtain opening is formed between the air outlet upper lip and the lower lip of the air curtain air sealing device body (1). The outlet regulating pressure plate (7) is fixedly connected to the upper part of the air curtain air sealing device body (1), and the two ends of the outlet regulating pressure plate (7) are respectively fixedly connected to the two sealing end covers (4); a plurality of outlet regulating pressure plate positioning adjustment screws (6) are fixed on the outlet regulating pressure plate (7), and the outlet regulating pressure plate positioning adjustment screws (6) cooperate with the outlet regulating pressure plate (7) to enable the upper lip to move longitudinally toward the lower lip to adjust the size of the air curtain opening, and the characteristics are: It has a secondary flow stabilizing cylinder (8), a primary flow stabilizing cylinder (9), and a high temperature resistant sealing rubber layer (10); The two ends of the primary flow stabilizing cylinder (9) and the secondary flow stabilizing cylinder (8) are respectively fixedly connected to the inner surfaces of the two sealing end covers (4), the primary flow stabilizing cylinder (9) is located at the center, the secondary flow stabilizing cylinder (8) is located outside the primary flow stabilizing cylinder (9), and is also located inside the wind curtain air sealing device body (1), and there are gaps between the primary flow stabilizing cylinder (9) and the secondary flow stabilizing cylinder (8), and between the secondary flow stabilizing cylinder (8) and the wind curtain air sealing device body (1); The two sealing end covers (4) both have air inlets; The first-stage flow stabilizing cylinder (9) is a rigid cylinder A having an air outlet A, wherein the width of the middle portion of the air outlet A is the smallest, and the width of the portions at both ends of the air outlet A is the largest; The secondary flow stabilizing cylinder (8) comprises two parts, one part is a rigid cylinder B with an air outlet B, and the other part is a rigid ridge sheet (11) fixed on the cylinder B, and the ridge sheet (11) is located on the outer side of the cylinder B opposite to the air outlet B; The cylindrical parts of the primary flow stabilizing cylinder (9), the secondary flow stabilizing cylinder (8) and the air curtain air sealing device body (1) are coaxial.

2. The rotary side-blown furnace sulfur dioxide fume overflow air curtain gas sealing device according to claim 1, characterized in that: The cross section of the secondary flow stabilizing cylinder (8) is bilaterally symmetrical.

3. The rotary side-blown furnace sulfur dioxide fume overflow air curtain gas sealing device according to claim 1, characterized in that: The central angle of the cross-section of the air outlet of the first-level flow stabilizing cylinder (9) is less than 180°.

4. The rotary side-blown furnace sulfur dioxide fume overflow air curtain gas sealing device according to claim 1, characterized in that: The inner surface of the sealing end cover (4) has a cylinder-like groove matching the end surface of the primary flow stabilizing cylinder (9), the end surface of the secondary flow stabilizing cylinder (8), and the end surface of the air curtain air sealing device body (1).

5. The rotary side-blown furnace sulfur dioxide fume overflow air curtain gas sealing device according to claim 1, characterized in that: The inner surfaces of the two sealing end covers (4), including the inner surface of the cylinder-like groove, are lined with a high-temperature resistant sealing rubber layer (10).

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