Sodium-based dry desulfurization low-resistance reactor

Abstract

The invention relates to the technical field of environment-friendly equipment, in particular to a sodium-based dry desulfurization low-resistance reactor which comprises a barrel and a Venturi structure, the barrel and the Venturi structure sequentially comprise a lower conical section, an adjusting section and an upper conical section from bottom to top, and at least one of the upper conical section and the lower conical section is movable and is driven by a first driving mechanism to ascend and descend; the adjusting section comprises a plurality of upper trapezoidal plates, a plurality of first rectangular plates, a plurality of lower trapezoidal plates, a plurality of sealing pieces and a plurality of synchronizing mechanisms, the upper trapezoidal plates, the first rectangular plates, the lower trapezoidal plates, the sealing pieces and the synchronizing mechanisms are arranged in a regular polygon shape in the circumferential direction of the barrel, and the synchronizing mechanisms are connected with the first rectangular plates so that the first rectangular plates can synchronously move in the radial direction; according to the sodium-based dry desulfurization low-resistance reactor, the sectional area of the throat pipe can be changed by adjusting the shape of the Venturi structure, so that the reactor adapts to different flue gas flows, and the desulfurization efficiency and adaptability are improved.

Description

Technical Field

[0001] The invention relates to the technical field of environmental protection equipment, and in particular to a sodium-based dry desulfurization low-resistance reactor. Background Art

[0002] Sodium-based SDS dry desulfurization technology uses absorbent sodium-based subcarbonate (Na2CO3) to absorb sulfides in SO2-containing flue gas to achieve the desulfurization process. Active Na+ ions react with SO2 to generate sodium sulfate and a small amount of water. Generally, the desulfurization tower is vertical, in which a Venturi structure is provided. A desulfurizer injection device is provided between the Venturi structures. The desulfurizer sprayed into the desulfurization tower is not mixed evenly, but after passing through the Venturi structure, it first contracts and then expands, and the gas flow rate first increases and then decreases, so that the desulfurizer can be evenly mixed into the flue gas, thereby improving the desulfurization efficiency.

[0003] However, in the prior art, the diameter of the venturi throat is a fixed value, which is mainly suitable for full-load operating conditions. Under low-complexity conditions, the homogenization effect is not obvious. However, if the throat diameter is combined with the low-complexity conditions, then at full load, the system resistance is large. Therefore, it is difficult for the prior art to cover a variety of conditions with low resistance and high efficiency. Summary of the invention

[0004] The problem solved by the present invention is: in order to solve the problem that the throat diameter of the Venturi in the prior art is a fixed value and it is difficult to cover various working conditions with low resistance and high efficiency, a sodium-based dry desulfurization low-resistance reactor with adjustable throat diameter is provided.

[0005] The present invention is implemented by the following technical scheme: a sodium-based dry desulfurization low-resistance reactor, comprising:

[0006] The cylinder is used for desulfurization reaction and is also the main support of the reactor. An adjustable Venturi structure is set inside the cylinder.

[0007] The Venturi structure includes a lower cone section, an adjustment section, and an upper cone section from bottom to top, in a contraction-diffusion shape. At least one of the upper cone section or the lower cone section is movable. A first driving mechanism is also provided in the cylinder. The first driving mechanism is used to drive the upper cone section or the lower cone section to move up and down.

[0008] The adjusting section includes an upper trapezoidal plate, a first rectangular plate, a lower trapezoidal plate, a seal, and a synchronization mechanism, all of which are provided with several groups and arranged in a regular polygonal shape along the circumferential direction of the cylinder.

[0009] The upper trapezoidal plate is in the shape of an isosceles trapezoid, the longer bottom side is hinged to the bottom of the upper cone section, and the shorter bottom side is hinged to the first rectangular plate;

[0010] The first rectangular plate has a width that is consistent with the width of the shorter bottom side of the upper trapezoidal plate, and the lower side of the first rectangular plate is hinged to the shorter bottom side of the lower trapezoidal plate.

[0011] The lower trapezoidal plate has a shorter bottom side that is consistent with the width of the first rectangular plate, and a longer bottom side of the lower trapezoidal plate is hinged to the upper opening of the lower cone section;

[0012] The sealing member is connected to the sides of all upper trapezoidal plates, lower trapezoidal plates and first rectangular plates to seal the gaps.

[0013] The synchronization mechanism is connected to the first rectangular plates and can enable the plurality of first rectangular plates to move synchronously in the radial direction.

[0014] Furthermore, the first driving mechanism is provided with two sets, located on both sides of the cylinder symmetrically, the first driving mechanism includes a servo motor and a ball screw assembly, the ball screw assembly is fixed to the side wall of the cylinder, a reinforcement ring is provided above the upper vertebral body, and the reinforcement ring is connected to the screw nut of the ball screw assembly.

[0015] Furthermore, the sealing member includes a first triangular plate, a second triangular plate, a quadrilateral plate, and a rubber member, wherein the quadrilateral is a rectangle or a trapezoid, two first triangular plates are hinged between two upper trapezoidal plates, two quadrilateral plates are hinged between two first rectangular plates, two second triangular plates are hinged between two lower trapezoidal plates, and the rubber member is located in the gap between the first triangular plate, the second triangular plate, and the quadrilateral plate.

[0016] Furthermore, the synchronization mechanism includes a plurality of bent connecting rods, which form at least a ring-repeated four-bar linkage, and a connecting plate is installed at one end of the bent connecting rod close to the axis of the cylinder, and the connecting plate is connected to the first rectangular plate.

[0017] Furthermore, the annularly repeated four-bar linkage is provided with at least two layers, the ends of all bent links away from the cylinder axis are connected by a first synchronization shaft, the ends of the bent links close to the cylinder axis are installed with a second synchronization shaft, and the connecting plate is connected to the second synchronization shaft.

[0018] Furthermore, the synchronization mechanism is provided with an active driving mechanism or a passive driving mechanism for driving the annularly repeated four-bar linkage to expand or contract.

[0019] Furthermore, the active drive mechanism includes one of a pneumatic cylinder, an oil cylinder, and an electric cylinder, and is installed on two adjacent first synchronous shafts or an adjacent first synchronous shaft and a second synchronous shaft.

[0020] Furthermore, the passive driving mechanism comprises a spring, and the spring is installed on two adjacent first synchronization shafts.

[0021] The beneficial effects of the present invention are:

[0022] 1. The sodium-based dry desulfurization low-resistance reactor of the present invention can cover all working conditions from low load to full load with low resistance and high efficiency. The cross-sectional area of ​​the throat can be changed by adjusting the shape of the Venturi structure to adapt to different flue gas flow rates and improve the desulfurization efficiency and adaptability.

[0023] 2. The design of the venturi structure of the present invention is ingenious. Through the articulation and synchronization mechanism of the upper trapezoidal plate, the first rectangular plate, the lower trapezoidal plate and the seal, the adjustability of the throat cross-sectional area is achieved. At the same time, the design of the seal not only ensures the sealing of the structure, but also improves the wear resistance by applying wear-resistant ceramic particles.

[0024] 3. The setting of the first driving mechanism of the present invention ensures the stable driving of the Venturi structure, and the precise lifting control can be achieved through the coordinated use of the servo motor and the ball screw assembly. In addition, the design of the synchronization mechanism ensures the synchronous movement of the multiple first rectangular plates in the radial direction, thereby improving the stability and reliability of the structure.

[0025] 4. The present invention can reduce the resistance of smoke passage and reduce energy consumption by optimizing the shape of the Venturi structure and adjusting the cross-sectional area of ​​the throat. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic structural diagram of a sodium-based dry desulfurization low-resistance reactor under low load according to the present invention;

[0027] Figure 2 Figure 1 A partial enlarged view of the

[0028] Figure 3 It is a schematic structural diagram of a sodium-based dry desulfurization low-resistance reactor under high load according to the present invention;

[0029] Figure 4 Figure 3 A partial enlarged view of the

[0030] Figure 5 It is a structural schematic diagram of the synchronization mechanism in the embodiment;

[0031] In the figure: 1 cylinder; 2 lower cone section; 3 adjustment section; 301 upper trapezoidal plate; 302 first rectangular plate; 303 lower trapezoidal plate; 304 sealing member; 3041 first triangular plate; 3042 second triangular plate; 3043 quadrilateral plate; 3044 rubber member; 4 upper cone section; 5 synchronization mechanism; 501 bent connecting rod; 502 connecting plate; 6 first driving mechanism. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1-5 As shown, a sodium-based dry desulfurization low-resistance reactor comprises:

[0034] The cylinder 1 is used for desulfurization reaction and is also the main support of the reactor. The diameter of the cylinder 1 is 4000mm. An adjustable Venturi structure is arranged inside the cylinder 1.

[0035] The Venturi structure includes, from bottom to top, a lower cone section 2, an adjustment section 3, and an upper cone section 4, which are in a contraction-diffusion shape. The cone angle of the lower cone section 2 is 60°, and the cone angle of the upper cone section 4 is 40°. The upper cone section 4 is fixed in the cylinder 1, and the lower cone section 2 is movably arranged in the cylinder 1. A first driving mechanism 6 is also arranged in the cylinder 1. The first driving mechanism 6 is used to drive the upper cone section 4 or the lower cone section 2 to move up and down.

[0036] The adjusting section 3 includes an upper trapezoidal plate 301, a first rectangular plate 302, a lower trapezoidal plate 303, a seal 304, and a synchronization mechanism 5, each of which is provided with eight groups and arranged in a regular octagonal shape along the circumferential direction of the cylinder 1.

[0037] The upper trapezoidal plate 301 is in the shape of an isosceles trapezoid, the longer bottom side is hinged to the bottom of the upper cone section 4, a regular octagon is connected inside the bottom of the upper cone section 4, and the shorter bottom side is hinged to the first rectangular plate 302;

[0038] The first rectangular plate 302 has a width that is consistent with the width of the shorter bottom side of the upper trapezoidal plate 301. The lower side of the first rectangular plate 302 is hinged to the shorter bottom side of the lower trapezoidal plate 303.

[0039] The lower trapezoidal plate 303 has a shorter bottom side that is consistent with the width of the first rectangular plate 302, and a longer bottom side of the lower trapezoidal plate 303 is hinged to the upper opening of the lower cone section 2;

[0040] The sealing member 304 comprises a first triangular plate 3041, a second triangular plate 3042, a quadrilateral plate 3043, and a rubber member 3044. The quadrilateral is a rectangle or a trapezoid. Two first triangular plates 3041 are hinged between the two upper trapezoidal plates 301, two quadrilateral plates 3043 are hinged between the two first rectangular plates 302, two second triangular plates 3042 are hinged between the two lower trapezoidal plates 303, and the rubber member 3044 is located in the gap between the first triangular plate 3041, the second triangular plate 3042, and the quadrilateral plate 3043. The first triangular plate 3041, the second triangular plate 3042, and the quadrilateral plate 3043 can be folded at any angle and fill most of the gaps between the upper trapezoidal plate 301, the first rectangular plate 302, and the lower trapezoidal plate 303. Only a small part of the gaps is connected by the rubber member 3044. The rubber member 3044 is generally plate-shaped and sealed at the edge of each plate. Wear-resistant ceramic particles can be applied to the surface of the rubber member 3044 to achieve flexible sealing while improving the wear resistance.

[0041] All the above-mentioned hinges are sealed, such as by applying rubber sheets behind the boards.

[0042] The synchronization mechanism 5 is connected to the first rectangular plates 302 and can enable the plurality of first rectangular plates 302 to move synchronously in the radial direction.

[0043] In this solution, when the first driving mechanism 6 drives the upper cone section 4 to rise, Figure 1-2 As shown, the upper trapezoidal plate 301, the first rectangular plate 302, and the lower trapezoidal plate 303 will be straightened to form a regular octagon with one or more trapezoidal plates 301 having the longer bottom side as the side length. At this time, the upper trapezoidal plate 301, the first rectangular plate 302, and the lower trapezoidal plate 303 are all throats of the Venturi structure, forming a throat with a larger cross-sectional area, reducing the resistance to the passage of smoke, and is suitable for full load conditions.

[0044] When the first driving mechanism 6 drives the upper cone section 4 to descend, Figure 3-4 As shown, the upper trapezoidal plate 301, the first rectangular plate 302, and the lower trapezoidal plate 303 will rotate along the hinge structure, and finally the sides of the upper trapezoidal plate 301, the first rectangular plate 302, and the lower trapezoidal plate 303 will fit together in pairs, the upper trapezoidal plate 301 will become a part of the diffusion section of the Venturi structure, and the lower trapezoidal plate 303 will become a part of the contraction section of the Venturi structure. The first rectangular plate 302 is the throat of the Venturi structure. The cross-section of the throat is a regular octagon with the width of the first rectangular plate 302 as the side length. The cross-sectional area is small, which is suitable for lower working conditions. The flue gas flow is small, and a smaller throat is used to improve the diffusion effect of the desulfurizer in the flue gas, thereby improving the desulfurization efficiency.

[0045] Therefore, this solution can cover all operating conditions from low load to full load with low resistance and high efficiency.

[0046] In practical applications, two sets of the first drive mechanism 6 are provided, located on both sides of the cylinder 1 symmetrically, and the first drive mechanism 6 includes a servo motor and a ball screw assembly, and the ball screw assembly is fixed to the side wall of the cylinder 1. A reinforcement ring is provided above the upper vertebral body, and the reinforcement ring is connected to the screw nut of the ball screw assembly. If necessary, three sets of the first drive mechanism 6 can also be provided.

[0047] In practical applications, such as Figure 5 As shown, the synchronization mechanism 5 includes a plurality of bent links 501, and the plurality of bent links 501 constitute at least a four-link mechanism that is repeated in a circular manner. A connecting plate 502 is installed at one end of the bent link 501 close to the axis of the cylinder 1, and the connecting plate 502 is connected to the first rectangular plate 302. This structure can ensure the synchronous movement of various parts of the bent link 501, thereby driving the first rectangular plate 302 to move inward or outward synchronously.

[0048] In actual applications, the annularly repeated four-bar linkage mechanism is provided with at least two layers, and the ends of all the bent links 501 away from the axis of the cylinder 1 are connected by a first synchronization shaft, and the ends of the bent links 501 close to the axis of the cylinder 1 are installed with a second synchronization shaft, and the connecting plate 502 is connected to the second synchronization shaft. The two-layer structure can ensure that the first rectangular plate 302 always remains vertical when moving, thereby improving the synchronization effect.

[0049] In practical applications, the synchronization mechanism 5 is provided with an active driving mechanism or a passive driving mechanism for driving the annularly repeated four-bar linkage to expand or contract.

[0050] In actual applications, the active driving mechanism includes one of a pneumatic cylinder, an oil cylinder, and an electric cylinder, which is installed on two adjacent first synchronous shafts or adjacent first synchronous shafts and second synchronous shafts. When the first driving mechanism 6 is driven, the active driving mechanism is driven synchronously to prevent the upper trapezoidal plate 301, the first rectangular plate 302, and the lower trapezoidal plate 303 from getting stuck in certain dead corners.

[0051] In practical applications, the passive driving mechanism includes a spring, which is installed on two adjacent first synchronization shafts. The spring can keep the first rectangular plate 302 contracting inwardly to prevent the upper trapezoidal plate 301, the first rectangular plate 302, and the lower trapezoidal plate 303 from getting stuck in certain dead corners.

[0052] In summary, the sodium-based dry desulfurization low-resistance reactor described in the present invention can cover all operating conditions from low load to full load with low resistance and high efficiency.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above implementation is only to illustrate the technical concept and features of the present invention, and its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it, and it cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A sodium-based dry desulfurization low-resistance reactor, characterized in that: include: The cylinder (1) is used for desulfurization reaction and is also the main support of the reactor. An adjustable Venturi structure is arranged inside the cylinder (1). The venturi structure comprises, from bottom to top, a lower cone section (2), an adjustment section (3), and an upper cone section (4), which are in a contraction-diffusion shape. At least one of the upper cone section (4) or the lower cone section (2) is movable. A first driving mechanism (6) is also arranged in the cylinder (1). The first driving mechanism (6) is used to drive the upper cone section (4) or the lower cone section (2) to move up and down. The regulating section (3) comprises an upper trapezoidal plate (301), a first rectangular plate (302), a lower trapezoidal plate (303), a sealing member (304), and a synchronization mechanism (5), all of which are provided in a plurality of groups and arranged in a regular polygonal shape along the circumferential direction of the cylinder (1). The upper trapezoidal plate (301) is in the shape of an isosceles trapezoid, the longer bottom side of which is hinged to the bottom of the upper cone section (4), and the shorter bottom side of which is hinged to the first rectangular plate (302); The first rectangular plate (302) has a width that is consistent with the width of the shorter bottom side of the upper trapezoidal plate (301), and the lower side of the first rectangular plate (302) is hinged to the shorter bottom side of the lower trapezoidal plate (303). The lower trapezoidal plate (303) has a shorter bottom side that is consistent with the width of the first rectangular plate (302), and a longer bottom side of the lower trapezoidal plate (303) is hinged to the upper opening of the lower cone section (2); The sealing member (304) is connected to the sides of all the upper trapezoidal plates (301), the lower trapezoidal plates (303), and the first rectangular plate (302) to seal the gap. The synchronization mechanism (5) is connected to the first rectangular plate (302) and can enable the plurality of first rectangular plates (302) to move synchronously in the radial direction.

2. A sodium-based dry desulfurization low-resistance reactor according to claim 1, characterized in that: The first drive mechanism (6) is provided with two sets, which are located on two symmetrical sides of the cylinder (1). The first drive mechanism (6) comprises a servo motor and a ball screw assembly. The ball screw assembly is fixed to the side wall of the cylinder (1). A reinforcement ring is provided above the upper vertebral body. The reinforcement ring is connected to the screw nut of the ball screw assembly.

3. A sodium-based dry desulfurization low-resistance reactor according to claim 1, characterized in that: The sealing member (304) comprises a first triangular plate (3041), a second triangular plate (3042), a quadrilateral plate (3043), and a rubber member (3044); the quadrilateral is a rectangle or a trapezoid; two first triangular plates (3041) are hinged between two upper trapezoidal plates (301); two quadrilateral plates (3043) are hinged between two first rectangular plates (302); two second triangular plates (3042) are hinged between two lower trapezoidal plates (303); and the rubber member (3044) is located in the gap between the first triangular plate (3041), the second triangular plate (3042), and the quadrilateral plate (3043).

4. A sodium-based dry desulfurization low-resistance reactor according to claim 1, characterized in that: The synchronization mechanism (5) comprises a plurality of bent connecting rods (501), which form at least a four-bar linkage mechanism that repeats in an annular manner. A connecting plate (502) is installed at one end of the bent connecting rod (501) close to the axis of the cylinder (1), and the connecting plate (502) is connected to the first rectangular plate (302).

5. A sodium-based dry desulfurization low-resistance reactor according to claim 4, characterized in that: The annularly repeated four-bar linkage is provided with at least two layers, the ends of all the bent links (501) away from the axis of the cylinder (1) are connected via a first synchronization shaft, the ends of the bent links (501) close to the axis of the cylinder (1) are provided with a second synchronization shaft, and the connecting plate (502) is connected to the second synchronization shaft.

6. A sodium-based dry desulfurization low-resistance reactor according to claim 5, characterized in that: The synchronization mechanism (5) is provided with an active driving mechanism or a passive driving mechanism, which is used to drive the annularly repeated four-bar linkage to expand or contract.

7. A sodium-based dry desulfurization low-resistance reactor according to claim 6, characterized in that: The active drive mechanism comprises one of an air cylinder, an oil cylinder and an electric cylinder, and is installed on two adjacent first synchronous shafts or adjacent first synchronous shafts and second synchronous shafts.

8. A sodium-based dry desulfurization low-resistance reactor according to claim 6, characterized in that: The passive driving mechanism comprises a spring, and the spring is installed on two adjacent first synchronization shafts.

Images