A blast furnace gas dry fine desulfurization device

Abstract

The present invention relates to the field of desulfurization devices, and in particular to a blast furnace gas dry fine desulfurization device, comprising a pretreatment tank, and also comprising a spreading mechanism arranged at the top of the pretreatment tank, the spreading mechanism comprising a shell, and the top of the shell is sleeved with a rotating gas joint, the rotating gas joint is located in the shell and connected to a short tube at one end, and the bottom of the short tube is provided with a ball head, the ball head is sleeved with a nozzle, and the peripheral wall of the short tube is slidably connected with a slip ring, the peripheral wall of the slip ring is provided with a slider, and the inner wall of the shell is provided with a reciprocating spiral slide. The nozzle of the device sprays sulfide absorbing granular material into the pretreatment tank in a jetting manner, and through the circular motion of the nozzle plus the synchronous up and down swinging action, a rapid, large-scale and uniform spreading effect of the sulfide absorbing granular material in the pretreatment tank is achieved, so that the sulfide absorbing granular material is better mixed with the tail gas flow to absorb and separate the sulfide.

Description

Technical Field

[0001] The invention relates to the field of desulfurization devices, in particular to a blast furnace gas dry fine desulfurization device. Background Art

[0002] The dry desulfurization equipment contains multiple devices, one of which is the pretreatment tank. Under certain temperature conditions in the tank, powdered or granular absorption materials (such as activated carbon) are scattered in the pretreatment tank and mixed with the exhaust gas flow passing through the pretreatment tank to adsorb the sulfide therein, so that the sulfide is separated from the exhaust gas. Powdered or granular materials are obviously more helpful in increasing the contact area with the exhaust gas than block or plate-shaped filter materials, and are not afraid of other impurity particles in the exhaust gas. There is no problem of easy clogging when using block or plate-shaped filter materials to absorb sulfide.

[0003] The above-mentioned dry desulfurization pretreatment method is based on the premise that the absorption material is fully mixed with the exhaust gas flow in the pretreatment tank. Therefore, a disperser is also provided in the pretreatment tank. The disperser used for solid particles usually utilizes interference in the gravity falling process of the solid particles to make them evenly dispersed. The dispersion effect is very limited for powdery or small-sized and light-weight particles, especially when there is gas flow in the pretreatment tank. The situation will be more complicated. Therefore, in order to optimize the above-mentioned problems, a blast furnace gas dry fine desulfurization device is proposed. Summary of the invention

[0004] In view of the problem that the disperser for the dry flue gas desulfurization pretreatment tank in the above or prior art has a poor dispersion effect on the adsorption material in powdery and light small particles, the present invention is proposed.

[0005] Therefore, the object of the present invention is to provide a blast furnace gas dry fine desulfurization device.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a blast furnace gas dry fine desulfurization device, comprising a pretreatment tank, and also comprising a spreading mechanism arranged at the top of the pretreatment tank, the spreading mechanism comprising an outer shell, and the top of the outer shell is sleeved with a rotating gas joint, the rotating gas joint is located in the outer shell and is connected to a short tube at one end, and a ball head is provided at the bottom end of the short tube, the ball head is sleeved with a nozzle, and the peripheral wall of the short tube is slidably connected with a slip ring, the peripheral wall of the slip ring is provided with a slider, the inner wall of the outer shell is provided with a reciprocating spiral groove, and the slider is matched with the reciprocating spiral groove for sliding connection, and the peripheral wall of the slip ring is hinged to the nozzle.

[0007] As a preferred solution of the blast furnace gas dry fine desulfurization device of the present invention, a collar is arranged between the short tube and the rotating gas joint, and blades are arranged on the circumferential wall of the collar along its radial direction, the cross-section of the blades is crescent-shaped, and the blades are distributed in a ring array about the collar, and a blowing interface and an exhaust port are arranged on the circumferential wall of the outer shell at the blades.

[0008] As a preferred solution of the blast furnace gas dry fine desulfurization device of the present invention, the air blowing interface and the exhaust port are distributed in a circular array about the shell, the air blowing interface is arranged along the tangent direction of the shell, and adjacent air blowing interfaces and exhaust ports are perpendicular to each other.

[0009] As a preferred solution of the blast furnace gas dry desulfurization device of the present invention, the circumferential wall of the short tube is provided with strip grooves parallel to its axial direction, and the strip grooves are distributed in a ring array about the short tube, and the inner wall of the slip ring is provided with strip protrusions matching the strip grooves for sliding connection.

[0010] As a preferred solution of the blast furnace gas dry fine desulfurization device of the present invention, the slider is arranged in a T shape, and a rotating seat is arranged along the radial direction of the peripheral wall of the sliding ring, and the slider is rotatably connected to the rotating seat.

[0011] As a preferred solution of the blast furnace gas dry desulfurization device of the present invention, wherein: the end of the ball head away from the short tube is provided with a tapered opening, and the tapered opening is connected to the short tube, one end of the nozzle is provided with a ball sleeve that matches the ball head and is slidably connected, and an acute angle is set between the axial direction of the ball sleeve opening and the injection direction of the nozzle nozzle.

[0012] As a preferred solution of the blast furnace gas dry desulfurization device of the present invention, the nozzle is inclined away from the slider, and a connecting rod is hinged between the outer wall of the ball sleeve and the slip ring, the connecting rod is located on the side of the slip ring away from the slider, and the connecting rod is located at one end of the ball sleeve and is bent.

[0013] As a preferred solution of the blast furnace gas dry fine desulfurization device of the present invention, the reciprocating spiral chute is composed of two chute with equal pitch, equal length and opposite rotation direction connected in a closed loop end to end, and the chute joints at both ends of the reciprocating spiral chute are smoothed.

[0014] As a preferred solution of the blast furnace gas dry fine desulfurization device of the present invention, the outer wall of the rotary gas joint is fixedly sleeved with the top of the shell, and the shell, short pipe, rotary gas joint and pretreatment tank are coaxial.

[0015] As a preferred solution of the blast furnace gas dry desulfurization device of the present invention, wherein: the peripheral wall of the outer shell is provided with a flange, and the flange is fixedly connected to the top of the pretreatment tank, and the air blowing interface and the exhaust port are both located at the upper part of the flange, the outer shell is located at the lower part of the flange and the nozzle is both sleeved in the pretreatment tank.

[0016] The beneficial effects of the blast furnace gas dry fine desulfurization device of the present invention are as follows: the nozzle of the device sprays the sulfide absorbing granular material into the pretreatment tank in a jet manner, and through the circular motion of the nozzle and the synchronous up and down swinging action, a rapid, large-scale and uniform dispersion effect of the sulfide absorbing granular material in the pretreatment tank is achieved, so that the sulfide absorbing granular material can be better mixed with the exhaust gas flow to absorb and separate the sulfide. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of the blast furnace gas dry fine desulfurization device.

[0019] Figure 2 This is a schematic diagram of the structure of the dispersion mechanism of the blast furnace gas dry fine desulfurization device.

[0020] Figure 3 This is a structural cross-sectional view of the dispersion mechanism of the blast furnace gas dry fine desulfurization device.

[0021] Figure 4 For blast furnace gas dry fine desulfurization device Figure 3 Partial structural breakdown diagram.

[0022] Figure 5 This is a cross-sectional view of the slip ring and rotary seat of the blast furnace gas dry fine desulfurization device.

[0023] Figure 6 This is a cross-sectional view of the nozzle structure of the blast furnace gas dry fine desulfurization device.

[0024] Figure 7 This is a schematic diagram of the nozzle spray direction when the slip ring of the blast furnace gas dry fine desulfurization device runs to the bottom dead center.

[0025] Figure 8 This is the process flow chart of the blast furnace gas dry fine desulfurization device.

[0026] In the figure: 100, pretreatment tank; 200, spreading mechanism; 201, shell; 202, rotary air joint; 203, short pipe; 204, nozzle; 205, slip ring; 206, connecting rod; 207, slider; 208, collar; 201a, blowing interface; 201b, exhaust port; 201c, flange; 201d, reciprocating spiral slide; 203a, ball head; 203b, cone mouth; 203c, strip groove; 203d, rotary seat; 204a, ball sleeve; 208a, blade. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] Example 1, reference Figure 1 to Figure 8 , which is the first embodiment of the present invention, and provides a blast furnace gas dry fine desulfurization device, which can achieve the effect of pressurized circulation and active injection and dispersion of powdered or granular absorbent materials, and includes a pretreatment tank 100, and also includes a dispersion mechanism 200 arranged at the top of the pretreatment tank 100, the dispersion mechanism 200 includes a shell 201, and the top of the shell 201 is sleeved with a rotary gas joint 202, the rotary gas joint 202 is located in the shell 201 and one end is connected to a short tube 203, and the bottom end of the short tube 203 is provided with a ball head 203a, the ball head 203a is sleeved with a nozzle 204, and the short tube 203 The peripheral wall of the slip ring 205 is slidably connected with a slip ring 205, and a slider 207 is provided on the peripheral wall of the slip ring 205. A reciprocating spiral slide 201d is provided on the inner wall of the shell 201. The reciprocating spiral slide 201d is composed of two grooves with equal pitch, equal length and opposite rotation directions connected in a closed loop end to end, and the groove joints at both ends of the reciprocating spiral slide 201d are smoothed. The slider 207 is T-shaped, and a swivel seat is provided along the radial direction of the peripheral wall of the slip ring 205. The slider 207 is rotatably connected with the swivel seat, and the slider 207 is matched with the reciprocating spiral slide 201d for sliding connection, and the peripheral wall of the slip ring 205 is hinged to the nozzle 204.

[0029] Specifically, the peripheral wall of the short tube 203 is provided with a strip groove 203c parallel to its axial direction, and the strip grooves 203c are distributed in a circular array about the short tube 203, the inner wall of the slip ring 205 is provided with a strip protrusion matching the strip groove 203c for sliding connection, the outer wall of the rotary air joint 202 is fixedly sleeved with the top of the shell 201, and the shell 201, the short tube 203, the rotary air joint 202 and the pretreatment tank 100 are coaxial, the peripheral wall of the shell 201 is provided with a flange 201c, and the flange 201c is fixedly connected to the top of the pretreatment tank 100, and the blowing interface 201a and the exhaust port 201b are both located at the upper part of the flange 201c, the shell 201 is located at the lower part of the flange 201c, and the nozzle 204 is sleeved in the pretreatment tank 100.

[0030] The technical principle and advantages of the device are further explained in combination with the prior art: the dispersing mechanism 200 of the device is essentially a device for controlling the spraying angle and range of powders and particles. In the prior art, the general means of spraying powders and particles is through a sandblasting gun. The principle is to use the low pressure generated by the compressed gas jet to suck the powder together and spray it out. The sprayed powder spreads as the compressed gas expands. Although the method of spreading the powder is simple, its working characteristics become a more obvious disadvantage when applied to the dry desulfurization process. For example, the powder diffusion effect depends on the pressure of the compressed gas. The higher the pressure, the more violent the expansion after spraying, and the better the diffusion effect. Secondly, when the spraying pressure is sufficient, the compressed gas will inertially move forward for a distance after leaving the nozzle to present the effect of atomized powder. In the pretreatment tank 100 with limited space, it is necessary to compress this invalid (no atomization effect) spraying distance as much as possible.

[0031] The present invention provides a pretreatment tank 100 in a dry desulfurization device, and mainly provides a spreading mechanism 200 of the pretreatment tank 100. Figure 1 and Figure 2 The function of the spreading mechanism 200 is to allow the nozzle 204 to swing up and down while making a circular motion, so as to spread the sulfide absorbing granular material in the pretreatment tank 100 quickly, over a large range and evenly.

[0032] The specific working principle of the device, first of all, it should be explained that the operation of the spreading mechanism 200 is realized by driving the short tube 203 to rotate. The slip ring 205 on the short tube 203 is limited by the guide of the strip groove 203c, and the slip ring 205 is only allowed to move along the axial direction of the short tube 203. The nozzle 204 is connected through the slip ring 205 and the connecting rod 206, so that the rotating short tube 203 drives the nozzle 204 to rotate, and the nozzle 204 is realized to spray materials in one circle. At the same time, the slider 207 on the slip ring 205 will slide along the reciprocating spiral slide groove 201d as the slip ring 205 rotates. The slider 207 is rotatably connected to the slip ring 205 through a swivel seat, which makes the slider 207 It can adapt to the change of direction of the reciprocating spiral slide 201d. In fact, the slider 207 and the reciprocating spiral slide 201d have a movement effect similar to that of a reciprocating screw and a matching nut. The reciprocating spiral slide 201d has two grooves with the same pitch and different rotation directions. Therefore, when the slider 207 slides from one groove to the groove of another rotation direction, the sliding direction of the slip ring 205 along the short tube 203 is changed, so that the slip ring 205 rotates relative to the outer shell 201 and reciprocates along the short tube 203 at the same time, and then the slip ring 205 repeatedly pushes and pulls the nozzle 204 through the connecting rod 206, so that the nozzle 204 swings up and down, achieving a fast, large-scale and uniform material atomization injection effect.

[0033] In summary, the nozzle 204 of the device sprays the sulfide absorbing granular material into the pretreatment tank 100 in a jet manner, and through the circular motion of the nozzle 204 and the synchronous up and down swinging action, a rapid, large-scale and uniform dispersion effect of the sulfide absorbing granular material in the pretreatment tank 100 is achieved, so that the sulfide absorbing granular material can be better mixed with the exhaust gas flow to absorb and separate the sulfide.

[0034] Example 2, reference Figure 3 and Figure 4 , which is the second embodiment of the present invention. Different from the previous embodiment, this embodiment provides an operation driving mode of the spreading mechanism 200 of the blast furnace gas dry fine desulfurization device, which solves the driving force problem of the operation of the spreading mechanism 200, and includes: a collar 208 is arranged between the short tube 203 and the rotating gas joint 202, and the peripheral wall of the collar 208 is provided with blades 208a along its radial direction, the cross-section of the blade 208a is crescent-shaped, and the blades 208a are distributed in an annular array with respect to the collar 208, and the peripheral wall of the shell 201 is located at the blade 208a. The blowing interface 201a and the exhaust port 201b are distributed in an annular array with respect to the shell 201, and the blowing interface 201a is arranged along the tangent direction of the shell 201, and adjacent blowing interfaces 201a and exhaust ports 201b are perpendicular to each other.

[0035] The driving method of the spreading mechanism 200 is realized by using compressed gas to drive the impeller to rotate, so as to simplify the device structure. In order to reliably drive the spreading mechanism 200 to operate through this driving method, firstly, the blades 208a are directly assembled in the shell 201, and the blades 208a and the shell 201 are not specifically sealed, and the bottom of the shell 201 is connected to the tank body. This design has two purposes. First, the compressed gas used to push the blades 208a will fill the interior of the shell 201 after doing work on the blades 208a, and partially out of the shell 201. The bottom outlet overflows, so that the inside of the shell 201 maintains a positive pressure difference with the inside of the tank, keeping the inside of the shell 201 clean, thereby avoiding the wear and jamming of parts caused by the granular material sprayed from the nozzle entering the inside of the spreading mechanism 200; secondly, the compressed air used to push the blades 208a quickly diffuses after doing work on the blades 208a, which helps to reduce the pressure between the blades 208a, so that there is a sufficient pressure difference between the compressed air entering through the blowing interface 201a and the blades 208a, so that the compressed gas produces a strong thrust on the blades 208a.

[0036] Furthermore, the air inlet direction of the blowing interface 201a is designed along the tangent direction of the outer shell 201, and the air inlet blowing direction is as close to perpendicular to the passing blade 208a as possible, thereby improving the efficiency of pushing the blade 208a. In addition, in the fluid, the resistance of the concave flow-facing surface is greater than that of the flat surface and the convex surface. Therefore, the side of the pressing sheet that bears the blowing is designed to be concave, which further improves the efficiency of pushing the blade 208a, and an exhaust port 201b is provided on the side of each blowing interface 201a, which quickly discharges the airflow refracted by the blade 208a to the inner wall of the outer shell 201, so as to assist the purpose of maintaining a pressure difference between the blade 208a and the intake compressed air.

[0037] The rest of the structure is the same as that of Example 1.

[0038] In summary, by adjusting the shape and spatial layout of the blades 208 a and guiding the airflow, the intake compressed air can efficiently push the blades 208 a , thereby stably driving the short tube 203 to rotate.

[0039] Example 3, reference Figure 5 and Figure 7 , which is the third embodiment of the present invention. Different from the previous embodiment, this embodiment provides a nozzle 204 of a spreading mechanism 200 of a blast furnace gas dry fine desulfurization device. The nozzle 204 is structurally designed so that the spraying direction and range of the nozzle 204 meet the use requirements. The nozzle 204 includes a ball head 203a having a conical opening 203b at one end away from the short tube 203, and the conical opening 203b is connected to the short tube 203. A ball sleeve 204a is provided at one end of the nozzle 204 and is slidably sleeved with the ball head 203a. An acute angle is provided between the axial direction of the opening of the ball sleeve 204a and the spraying direction of the nozzle 204. The nozzle 204 is tilted in a direction away from the slider 207, and a connecting rod 206 is hinged between the outer wall of the ball sleeve 204a and the slip ring 205. The connecting rod 206 is located on the side of the slip ring 205 away from the slider 207, and the connecting rod 206 is located at one end of the ball sleeve 204a and is bent.

[0040] The nozzle 204 of the device is designed to be skewed, that is, the axial direction of the spray direction of the nozzle 204 is not coaxial with the axis of the nozzle 204 assembly end. This is because the deflection range of the ball sleeve 204a on the ball head 203a is limited, so the up and down swing range of the nozzle 204 is also limited. Figure 6 When the ball sleeve 204a swings to one side to the extreme position, if the nozzle 204 does not tilt to the other side, then during the reciprocating swing of the ball sleeve 204a, the nozzle 204 will repeatedly sweep over the center of the bottom, and the nozzle 204 will not be lifted up enough to the side, resulting in the disadvantages of too high bottom mixing concentration and reduced peripheral coverage and low mixing concentration. Therefore, the device solves the above problem by optimizing the shape of the nozzle 204 in a targeted manner.

[0041] The rest of the structure is the same as that of Example 2.

[0042] In summary, the shape and structure design of the nozzle 204 of the device helps to improve the uniformity and coverage of material distribution.

[0043] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A blast furnace gas dry fine desulfurization device, comprising a pretreatment tank (100), characterized in that: It also includes a spreading mechanism (200) arranged at the top of the pretreatment tank (100), the spreading mechanism (200) including a shell (201), and the top of the shell (201) is sleeved with a rotating gas joint (202), one end of the rotating gas joint (202) located inside the shell (201) is connected to a short tube (203), and the bottom end of the short tube (203) is provided with a ball head (203a), the ball head (203a) is sleeved with a nozzle (204), and the peripheral wall of the short tube (203) is slidably connected with a slip ring (205), the peripheral wall of the slip ring (205) is provided with a slider (207), the inner wall of the shell (201) is provided with a reciprocating spiral slide groove (201d), and the slider (207) is matched with the reciprocating spiral slide groove (201d) and slidably connected, and the peripheral wall of the slip ring (205) and the nozzle (204) are hinged; A collar (208) is provided between the short tube (203) and the rotary air joint (202), and blades (208a) are provided on the peripheral wall of the collar (208) along its radial direction, the blades (208a) have a crescent-shaped cross section, and the blades (208a) are distributed in an annular array with respect to the collar (208), and a blowing interface (201a) and an exhaust port (201b) are provided on the peripheral wall of the housing (201) at the blades (208a); The air blowing interfaces (201a) and the exhaust ports (201b) are distributed in a ring array with respect to the outer shell (201), the air blowing interfaces (201a) are arranged along a tangent direction of the outer shell (201), and adjacent air blowing interfaces (201a) and exhaust ports (201b) are perpendicular to each other; The peripheral wall of the short tube (203) is provided with a strip groove (203c) parallel to the axial direction thereof, and the strip grooves (203c) are distributed in a ring array with respect to the short tube (203), and the inner wall of the slip ring (205) is provided with a strip protrusion matching the strip groove (203c) for sliding connection; The slider (207) is arranged in a T-shape, and a rotating seat is arranged on the peripheral wall of the slip ring (205) along its radial direction, and the slider (207) is rotatably connected to the rotating seat; A conical opening (203b) is provided at one end of the ball head (203a) away from the short tube (203), and the conical opening (203b) is communicated with the short tube (203); a ball sleeve (204a) is provided at one end of the nozzle (204) and is slidably sleeved with the ball head (203a); an acute angle is provided between the axial direction of the opening of the ball sleeve (204a) and the spraying direction of the nozzle (204); The nozzle (204) is tilted in a direction away from the slider (207), and a connecting rod (206) is hinged between the outer wall of the ball sleeve (204a) and the slip ring (205), the connecting rod (206) is located on a side of the slip ring (205) away from the slider (207), and the connecting rod (206) is bent at one end of the ball sleeve (204a); The reciprocating spiral slide groove (201d) is composed of two grooves with equal pitch, equal length and opposite rotation directions connected end to end in a closed loop, and the groove joints at both ends of the reciprocating spiral slide groove (201d) are smoothed; The outer wall of the rotating gas joint (202) is fixedly sleeved with the top of the outer shell (201), and the outer shell (201), the short tube (203), the rotating gas joint (202) and the pretreatment tank (100) are coaxial; A flange (201c) is provided on the peripheral wall of the shell (201), and the flange (201c) is fixedly connected to the top of the pretreatment tank (100), and the air blowing interface (201a) and the exhaust port (201b) are both located at the upper part of the flange (201c), the shell (201) is located at the lower part of the flange (201c), and the nozzle (204) is sleeved in the pretreatment tank (100).

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