Dry desulfurization reaction tower

Abstract

The utility model provides a dry desulfurization reaction tower, belongs to desulfurization tower technical field, the dry desulfurization reaction tower includes tower body, inlet pipeline, mixing wind subassembly and support, the tower body includes the inlet section, first variable diameter section, steady flow section, reaction section, second variable diameter section and outlet section that sets up in proper order from bottom to top, the inner diameter of the first reducing section is gradually increased from bottom to top, and the inner diameter of the second reducing section is gradually reduced from bottom to top; the inlet pipeline is connected to the inlet section, and the axial direction of the inlet pipeline is tangent to the inner circumferential surface of the inlet section; the air mixing assembly is arranged in the flow stabilizing section, the air mixing assembly comprises a plurality of accelerating pipes which are through in the vertical direction, and the axial direction of the accelerating pipes and the axial direction of the flow stabilizing section are arranged to form an included angle; the support is connected to the periphery of the tower body, and a mounting hole for the inlet pipeline to penetrate through is formed in the support. According to the dry desulfurization reaction tower provided by the utility model, the utilization efficiency of a desulfurizing agent is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of desulfurization towers, and particularly relates to a dry desulfurization reaction tower. Background Art

[0002] At present, common dry desulfurization methods (such as SDS sodium-based dry desulfurization and high-efficiency calcium-based dry desulfurization) mostly adopt the method of spraying desulfurizer into the flue for desulfurization reaction. Dry desulfurization requires sufficient reaction time to reach the reaction design value. Therefore, the length of the reaction flue between the desulfurizer injection point and the desulfurizer removal point (mostly bag filters) directly affects the reaction effect. In existing dry desulfurization, the distance between the desulfurizer injection point and the desulfurizer removal point is short, which reduces the reaction time and there is a deviation from the reaction design value, resulting in unsatisfactory desulfurization effect. Summary of the Utility Model

[0003] An embodiment of the utility model provides a dry desulfurization reaction tower, aiming to solve the technical problem that the distance between the desulfurizer spraying point and the desulfurizer removal point in existing dry desulfurization is short, there is a deviation between the actual reaction time and the reaction design value, and the desulfurization effect is unsatisfactory.

[0004] To achieve the above object, the technical solution adopted by the utility model is: to provide a dry desulfurization reaction tower, which is arranged before the desulfurizer removal point, and includes:

[0005] A tower body, including an inlet section, a first diameter-changing section, a steady-flow section, a reaction section, a second diameter-changing section, and an outlet section arranged in sequence from bottom to top. The inner diameter of the first diameter-changing section gradually increases from bottom to top, and the inner diameter of the second diameter-changing section gradually decreases from bottom to top;

[0006] An inlet pipe, connected to the inlet section, and the axis of the inlet pipe is tangent to the inner peripheral surface of the inlet section;

[0007] A mixed-air component, arranged in the steady-flow section. The mixed-air component includes a plurality of accelerating pipes that penetrate in the up-down direction, and the axis of the accelerating pipe is arranged at an angle to the axis of the steady-flow section;

[0008] A support, connected to the outer periphery of the tower body, and the support is provided with an installation hole for the inlet pipe to pass through.

[0009] In a possible implementation manner, the mixed-air component further includes:

[0010] An upper sealing plate, fixed in the steady-flow section;

[0011] A lower sealing plate, fixed in the steady-flow section, and the lower sealing plate is spaced below the upper sealing plate;

[0012] Wherein, the accelerating tube is connected between the upper sealing plate and the lower sealing plate, and through holes corresponding to the accelerating tube are provided on both the upper sealing plate and the lower sealing plate.

[0013] In a possible implementation manner, conical sleeves are provided between the accelerating tube and the upper sealing plate, and between the accelerating tube and the lower sealing plate. The axial direction of the conical sleeve is parallel to the axial direction of the steady flow section. The small end of the conical sleeve is connected to the accelerating tube, and the large end is connected to the upper sealing plate or the lower sealing plate.

[0014] In a possible implementation manner, a plurality of the accelerating tubes are distributed in a circular array.

[0015] In a possible implementation manner, the accelerating tube includes a first air mixing section, a second air mixing section, and a third air mixing section arranged in sequence from bottom to top. The inner diameter of the first air mixing section gradually decreases from bottom to top. The diameter of the second air mixing section is equal to the minimum inner diameter of the first air mixing section. The inner diameter of the third air mixing section gradually increases from bottom to top. The minimum inner diameter of the third air mixing section is equal to the diameter of the second air mixing section.

[0016] In a possible implementation manner, a dust discharge hopper is communicated with the bottom of the tower body, and a flap valve is provided on the dust discharge hopper.

[0017] In a possible implementation manner, hanging ears are provided on the outer periphery of the dust discharge hopper.

[0018] In a possible implementation manner, support ears are provided on the outer periphery of the tower body, and the support ears are lapped on the top of the support.

[0019] In a possible implementation manner, a groove for placing the support ears is provided on the top of the support.

[0020] In a possible implementation manner, compensators are provided in both the inlet section and the outlet section.

[0021] The solution shown in the embodiments of the present application, compared with the prior art, the dry desulfurization reaction tower of the present utility model uses a vertical tower body structure, which is convenient for layout and transformation, saves space, has a low increased resistance, and has little impact on the front and rear equipment; the flue gas goes upward from the first reduced-diameter section and the diameter becomes larger, reducing the gas flow velocity and increasing the residence time of the flue gas in the tower body. Compared with the traditional desulfurization tower, a mixing air component is also provided in the tower body of this tower, increasing the initial velocity and diffusion angle of the flue gas containing desulfurizing agent powder at the outlet of the mixing air component, increasing the contact and reaction between the desulfurizing agent and sulfur dioxide in the flue gas; and the mixing air component makes the local air flow accelerate, avoiding the phenomenon that the air flow decreases due to the increased diameter and then the desulfurizing agent powder falls and deposits, improving the utilization efficiency of the desulfurizing agent; the inlet pipe is tangent to the inner peripheral surface of the inlet section, and the acceleration pipe is inclined, so that the flue gas generates a swirling flow of the same swirling direction, increasing the contact and reaction time between the desulfurizing agent and sulfur dioxide in the flue gas, and the swirling flue gas can also prevent the desulfurizing agent powder from falling. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 FIG. 6 is a front view structural schematic diagram of the dry desulfurization tower provided by the embodiment of the present utility model;

[0023] Figure 2 is the sectional view structural schematic diagram along line A-A in Figure 1 FIG. 6;

[0024] Figure 3 is the sectional view structural schematic diagram along line B-B in Figure 1 FIG. 6;

[0025] Figure 4 FIG. 9 is a sectional view structural schematic diagram of the acceleration pipe adopted by the embodiment of the present utility model.

[0026] DESCRIPTION OF THE REFERENCE NUMERALS:

[0027] 10 - tower body; 11 - inlet section; 12 - first reduced-diameter section; 13 - steady flow section; 14 - reaction section; 15 - second reduced-diameter section; 16 - outlet section; 17 - support ear;

[0028] 20 - inlet pipe;

[0029] 30 - mixing air component; 31 - acceleration pipe; 311 - first mixing air section; 312 - second mixing air section; 313 - third mixing air section; 32 - upper sealing plate; 33 - lower sealing plate; 34 - conical sleeve;

[0030] 40 - support; 41 - groove;

[0031] 50 - ash discharge hopper; 51 - slide gate valve; 52 - hanging ear;

[0032] 60 - compensator. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0034] In the claims, the description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are for distinguishing different objects and not for describing a specific order. In the claims, the description and the above-mentioned drawings of the present utility model, the terms "upper", "lower", "top", "bottom" are in the same up-and-down direction as the tower body 10, the term "inner" refers to the direction towards the corresponding structural axis, and the term "outer" refers to the direction away from the corresponding structural axis; for the remaining orientation words, unless otherwise clearly defined, when using terms such as "front", "rear", "center", "lateral", "longitudinal", "horizontal", "vertical", "left", "right", "clockwise", "counterclockwise", "high", "low", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it should not be understood as limiting the specific protection scope of the present utility model.

[0035] In the claims, the description and the above-mentioned drawings of the present utility model, unless otherwise clearly defined, when using the terms "fixed connection" or "fixedly connected", should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrated as a whole and being fixedly connected through other devices or elements.

[0036] In the claims, the description and the above-mentioned drawings of the present utility model, when using terms such as "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0037] Please refer to Figures 1 to 4, a dry desulfurization reaction tower provided by the present utility model will be described below. The dry desulfurization reaction tower includes a tower body 10, an inlet pipe 20, a mixing air assembly 30, and a support 40. The tower body 10 includes an inlet section 11, a first diameter-changing section 12, a flow-stabilizing section 13, a reaction section 14, a second diameter-changing section 15, and an outlet section 16 arranged in sequence from bottom to top. The inner diameter of the first diameter-changing section 12 gradually increases from bottom to top, and the inner diameter of the second diameter-changing section 15 gradually decreases from bottom to top; the inlet pipe 20 is connected to the inlet section 11, and the axis of the inlet pipe 20 is tangent to the inner peripheral surface of the inlet section 11; the mixing air assembly 30 is arranged in the flow-stabilizing section 13, and the mixing air assembly 30 includes a plurality of accelerating pipes 31 that penetrate in the up-down direction, and the axis of the accelerating pipe 31 is arranged at an angle with the axis of the flow-stabilizing section 13; the support 40 is connected to the outer periphery of the tower body 10, and the support 40 is provided with an installation hole through which the inlet pipe 20 passes.

[0038] Optionally, the angle between the axis of the accelerating pipe 31 and the axis of the flow-stabilizing section 13 is about 10°.

[0039] It should be noted that referring to Figure 1 , the outlet section 16 is discharged from the outer side at the top center and is transitioned by an arc. This structure has a smaller outlet resistance and reduces the probability of the desulfurizer powder colliding with the inner wall of the tower body 10 and falling due to conventional radial side air outlet.

[0040] The specific production process of the dry desulfurization reaction tower provided in this embodiment is as follows: The flue gas enters the tower body 10 from the inlet pipe 20 and flows from bottom to top. Since the inlet pipe 20 is tangent to the inner peripheral surface of the inlet section 11, the flue gas entering the inlet section 11 can be in a swirling state. Then, the flue gas sequentially passes through the first diameter-changing section 12, the flow-stabilizing section 13, the reaction section 14, and the second diameter-changing section 15 and then flows out from the outlet section 16. When the flue gas passes through the first diameter-changing section 12, since the diameter of the first diameter-changing section 12 becomes larger upwards, the reaction residence time of the flue gas can be increased; when the flue gas passes through the flow-stabilizing section 13, the accelerating pipe 31 on the mixing air assembly 30 can increase the initial velocity and diffusivity of the flue gas containing the desulfurizer powder; when the flue gas passes through the second diameter-changing section 15, since the diameter of the second diameter-changing section 15 becomes smaller upwards, the flow rate of the flue gas is increased and then discharged from the outlet section 16.

[0041] Compared with the prior art, the dry desulfurization reaction tower of the present utility model uses a vertical tower body 10 structure, which is convenient for layout and transformation, saves space, has a low additional resistance, and has little impact on the front and rear equipment; the flue gas goes upward from the first reduced-diameter section 12 and the diameter becomes larger, reducing the gas flow velocity and increasing the residence time of the flue gas in the tower body 10. Compared with the traditional desulfurization tower, a mixing air component 30 is also provided in the tower body 10, increasing the initial velocity and diffusion angle of the flue gas containing desulfurizing agent powder at the outlet of the mixing air component 30, increasing the contact and reaction between the desulfurizing agent and sulfur dioxide in the flue gas; and the mixing air component 30 makes the local gas flow accelerate, avoiding the phenomenon that the gas flow decreases due to the increase in diameter and then the desulfurizing agent powder falls and deposits, improving the utilization efficiency of the desulfurizing agent; the inlet pipe 20 is tangent to the inner peripheral surface of the inlet section 11, and the acceleration pipe 31 is inclined, so that the flue gas generates a swirling flow of the same swirling direction, improving the contact and reaction time between the desulfurizing agent and sulfur dioxide in the flue gas, and the swirling flue gas can also prevent the desulfurizing agent powder from falling.

[0042] In some embodiments, an improved implementation manner of the above mixing air component 30 can adopt the structure shown in FIG. 1. Refer to Figure 1 , the mixing air component 30 further includes an upper sealing plate 32 and a lower sealing plate 33. The upper sealing plate 32 is fixed in the steady flow section 13; the lower sealing plate 33 is fixed in the steady flow section 13, and the lower sealing plate 33 is spaced below the upper sealing plate 32;

[0043] Among them, the acceleration pipe 31 is connected between the upper sealing plate 32 and the lower sealing plate 33, and through holes corresponding to the acceleration pipe 31 are provided on both the upper sealing plate 32 and the lower sealing plate 33.

[0044] The upper sealing plate 32 and the lower sealing plate 33 fix a plurality of acceleration pipes 31 as a whole, which is convenient for integral installation in the steady flow section 13 and reduces the labor intensity; and the upper sealing plate 32 and the lower sealing plate 33 can ensure that the flue gas only passes through the acceleration pipe 31, ensuring the full contact between the flue gas and the desulfurizing agent powder and improving the desulfurization efficiency of the flue gas.

[0045] Specifically, the plurality of acceleration pipes 31 between the upper sealing plate 32 and the lower sealing plate 33 can be distributed in various forms. For example, the plurality of acceleration pipes 31 are distributed in a circular array, or the plurality of acceleration pipes 31 are distributed in a rectangular array, etc., which can ensure the uniform passage of the flue gas and the full contact with the desulfurizing agent powder.

[0046] In some embodiments, an improved implementation manner of the above mixing air component 30 can adopt the structure shown in Figure 1 FIG. Figure 1, a conical sleeve 34 is provided between the accelerating pipe 31 and the upper sealing plate 32, and between the accelerating pipe 31 and the lower sealing plate 33. The axis of the conical sleeve 34 is parallel to the axis of the steady flow section 13. The small end of the conical sleeve 34 is connected to the accelerating pipe 31, and the large end is connected to the upper sealing plate 32 or the lower sealing plate 33. The conical sleeve 34 fixed between the lower sealing plate 33 and the accelerating pipe 31 is larger at the bottom and smaller at the top, and the conical sleeve 34 fixed between the upper sealing plate 32 and the accelerating pipe 31 is smaller at the bottom and larger at the top, which can ensure that the flue gas accelerates quickly when entering the accelerating pipe 31 and the airflow decelerates after flowing out of the accelerating pipe 31, realizing the full mixing reaction of the flue gas and the desulfurizer powder.

[0047] In some embodiments, a specific implementation of the above accelerating pipe 31 may adopt the structure as Figure 4 shown. Refer to Figure 4 , the accelerating pipe 31 includes a first air mixing section 311, a second air mixing section 312, and a third air mixing section 313 arranged in sequence from bottom to top. The inner diameter of the first air mixing section 311 gradually decreases from bottom to top. The diameter of the second air mixing section 312 is equal to the minimum inner diameter of the first air mixing section 311. The inner diameter of the third air mixing section 313 gradually increases from bottom to top, and the minimum inner diameter of the third air mixing section 313 is equal to the diameter of the second air mixing section 312. That is, the inner diameter of the accelerating pipe 31 first gradually becomes smaller from bottom to top, then remains unchanged, and finally gradually becomes larger. Through this change trend, the rapid passage of the flue gas can be realized, the initial velocity and diffusivity of the flue gas containing desulfurizer powder can be improved. The flue gas flowing out of the accelerating pipe 31 contains desulfurizer powder. Since the diffusivity of the desulfurizer powder is relatively high at this time, the flue gas in the reaction section 14 can fully react with the desulfurizer powder dispersed therein, optimizing the desulfurization effect of the flue gas.

[0048] In some embodiments, an improved implementation of the above tower body 10 may adopt the structure as Figure 1 shown. Refer to Figure 1 , a dust discharge hopper 50 is connected to the bottom of the tower body 10, and a flap valve 51 is provided on the dust discharge hopper 50. The desulfurizer powder inside the tower body 10 will inevitably fall after hitting the inner wall of the tower body 10. By setting the dust discharge hopper 50, the fallen dust can be collected, and the flap valve 51 is regularly opened for dust discharge, which is convenient for cleaning the tower body 10 and avoiding too much dust accumulation being brought into the top when the flue gas enters.

[0049] It should be noted that the dust discharge hopper 50 is also conical, and the included angle between the side wall of the dust discharge hopper 50 and the axis of the tower body 10 is about 30°.

[0050] Specifically, refer to Figure 1, hanging ears 52 are provided on the outer periphery of the ash discharge hopper 50. To facilitate ash discharge, an ash discharge bag can be hung on the hanging ears 52 and then the slide valve 51 can be opened to achieve rapid ash discharge; as a variant, an automatic ash conveying system can also be directly installed at the bottom of the ash discharge hopper 50 to discharge or recycle the desulfurized ash, or a bulk loader or a suction and discharge tanker interface can be installed to discharge the ash using a special ash discharge vehicle, with strong versatility.

[0051] In some embodiments, a specific connection manner between the above-mentioned tower body 10 and the support 40 can adopt the structure shown in Fig. 1. Refer to Figure 1 , support ears 17 are provided on the outer periphery of the tower body 10, and the support ears 17 are lapped on the top of the support 40. The support ears 17 on the tower body 10 are lapped on the top of the support 40, which facilitates the installation of the tower body 10, and the support 40 can support the bottom of the tower body 10 at a certain height to facilitate ash discharge.

[0052] Specifically, refer to Figure 3 , a groove 41 for placing the support ears 17 is provided on the top of the support 40. The support ears 17 are placed in the groove 41 on the top of the support 40, and the groove 41 can limit the support ears 17, improve the installation stability of the tower body 10, prevent the tower body 10 from shaking, and reduce the working noise.

[0053] In some embodiments, an improved implementation manner of the above-mentioned tower body 10 can adopt the structure shown in Fig. 1. Refer to Figure 1 , compensators 60 are provided on both the inlet section 11 and the outlet section 16. The compensators 60 are used to connect with the processes of the front and rear sections to reduce the influence on the equipment of the front and rear sections.

[0054] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dry desulfurization reaction tower, arranged before the desulfurization agent removal point, characterized in that: include: The tower body comprises an inlet section, a first diameter-changing section, a steady flow section, a reaction section, a second diameter-changing section and an outlet section which are arranged in sequence from bottom to top, wherein the inner diameter of the first diameter-changing section gradually increases from bottom to top, and the inner diameter of the second diameter-changing section gradually decreases from bottom to top; An inlet pipe connected to the inlet section, wherein the axial direction of the inlet pipe is tangent to the inner circumference of the inlet section; An air mixing component is arranged in the flow stabilizing section, the air mixing component comprises a plurality of accelerating tubes penetrating in the vertical direction, and the axial direction of the accelerating tube is arranged at an angle with the axial direction of the flow stabilizing section; A bracket is connected to the outer periphery of the tower body, and the bracket is provided with a mounting hole for the inlet pipe to pass through.

2. The dry desulfurization reaction tower according to claim 1, characterized in that: The air mixing component also includes: An upper sealing plate, fixed in the steady flow section; A lower sealing plate is fixed in the flow stabilizing section, and the lower sealing plate is spaced below the upper sealing plate; Wherein, the accelerating tube is connected between the upper sealing plate and the lower sealing plate, and both the upper sealing plate and the lower sealing plate are provided with through holes corresponding to the accelerating tube.

3. The dry desulfurization reaction tower according to claim 2, characterized in that: A conical sleeve is provided between the accelerating tube and the upper sealing plate, and between the accelerating tube and the lower sealing plate. The axial direction of the conical sleeve is parallel to the axial direction of the flow stabilizing section. The small end of the conical sleeve is connected to the accelerating tube, and the large end is connected to the upper sealing plate or the lower sealing plate.

4. The dry desulfurization reaction tower according to claim 1, characterized in that: The plurality of accelerating tubes are distributed in a ring array.

5. The dry desulfurization reaction tower according to claim 1, characterized in that: The accelerating tube includes a first air mixing section, a second air mixing section, and a third air mixing section which are arranged in sequence from bottom to top. The inner diameter of the first air mixing section gradually decreases from bottom to top, the diameter of the second air mixing section is equal to the minimum inner diameter of the first air mixing section, and the inner diameter of the third air mixing section gradually increases from bottom to top, and the minimum inner diameter of the third air mixing section is equal to the diameter of the second air mixing section.

6. The dry desulfurization reaction tower according to claim 1, characterized in that: The bottom of the tower body is connected with an ash discharge hopper, and a gate valve is arranged on the ash discharge hopper.

7. The dry desulfurization reaction tower according to claim 6, characterized in that: The outer periphery of the ash discharge hopper is provided with hanging ears.

8. The dry desulfurization reaction tower according to claim 1, characterized in that: The outer periphery of the tower body is provided with supporting ears, and the supporting ears are overlapped on the top of the bracket.

9. The dry desulfurization reaction tower according to claim 8, characterized in that: A groove for accommodating the supporting ear is provided on the top of the bracket.

10. The dry desulfurization reaction tower according to claim 1, characterized in that: The inlet section and the outlet section are both provided with compensators.

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