Device for improving oxidation efficiency of desulfurization slurry

Abstract

The invention relates to the technical field of wet desulfurization, and discloses a device for improving the oxidation efficiency of desulfurization slurry, which comprises the following steps: introducing air at the position of a bottom plate; the two first plates are obliquely arranged, and the two ends of the bottom plate are connected with the lower ends of the two first plates correspondingly. The two second plates are obliquely arranged, and the lower ends of the two second plates are connected with the upper ends of the two first plates correspondingly; the first plate is provided with a first hole; the second plate is provided with a second hole; the two ends of the first connecting plate are connected with the upper ends of the two second plates correspondingly. The two first side plates are respectively connected with the bottom plate, the first plate piece, the second plate piece and the first connecting plate to form a first cavity; in the desulfurization slurry, air moves along the first plate, enters the first cavity through the first hole, moves along the second plate and flows out through the second hole. Oxidation air moves along the inclined first plate and the inclined second plate, the movement length of bubbles in desulfurization slurry is prolonged, the retention time is prolonged, the oxidation efficiency of the desulfurization slurry is remarkably improved, and the energy consumption of an oxidation fan is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wet desulfurization, and particularly relates to a device for improving the oxidation efficiency of desulfurization slurry. Background Art

[0002] The oxidation of calcium sulfite is an important reaction in the limestone-gypsum wet desulfurization process; specifically, limestone is used to absorb SO 2 in the raw flue gas at the inlet of the desulfurization absorption tower, forming calcium sulfite. The dissolved oxygen in the desulfurization slurry in the desulfurization absorption tower oxidizes calcium sulfite into sulfate, and finally crystallizes out in the form of gypsum. The main chemical reaction formulas involved are shown in Formulas (1) to (3).

[0003] SO 2 +H 2 O→H 2 SO 3 (1)

[0004]

[0005] The oxidation system of limestone-gypsum wet desulfurization facilities generally adopts a forced oxidation process. The dissolved oxygen in the desulfurization slurry mainly comes from the oxidation air sprayed into the oxidation zone of the desulfurization absorption tower; if the oxidation air is insufficient, excessive or unevenly distributed, it will have an adverse impact on the safe and economic operation of wet desulfurization. Therefore, the desulfurization oxidation reaction plays a crucial role in the quality of desulfurization slurry, desulfurization efficiency, and gypsum quality.

[0006] Currently, when carrying out the forced oxidation process for calcium sulfite in the desulfurization slurry in the desulfurization absorption tower, an oxidation air pipe is generally used; the forms of the oxidation air pipe are mainly network type and spray gun type. The bubble size of the air bubbles entering the desulfurization slurry in the desulfurization absorption tower through the network-type oxidation air pipe is relatively large, and oxygen is a poorly soluble gas; especially under low liquid level conditions, a large number of large-sized bubbles have a large buoyancy and a reduced surface area. In addition, the height dimension of the oxidation zone in the desulfurization absorption tower is relatively small, and a large number of bubbles escape through the liquid surface before they can dissolve into the desulfurization slurry, resulting in a low utilization rate of dissolved oxygen in the oxidation system, generally only 25% - 33%. In order to provide sufficient oxygen, only the power of the oxidation fan connected to the oxidation air pipe in the oxidation system can be increased, which in turn leads to a significant increase in the energy consumption of the oxidation fan. Among them, the height dimension of the oxidation zone in the desulfurization absorption tower refers to the height between the installation center line of the oxidation air pipe and the liquid level of the desulfurization slurry in the desulfurization absorption tower. Summary of the Invention

[0007] In view of this, the present invention provides a device for improving the oxidation efficiency of desulfurization slurry, so as to solve the problems that when carrying out the forced oxidation process of calcium sulfite in the desulfurization slurry in the desulfurization absorption tower, the bubble size of the oxidation air entering the desulfurization slurry in the desulfurization absorption tower through the pipe network type oxidation air duct is relatively large, and oxygen is a poorly soluble gas; especially under the condition of low liquid level, a large number of large-sized bubbles result in a relatively large buoyancy of the bubbles and a reduced surface area. In addition, the height dimension of the oxidation zone in the desulfurization absorption tower is relatively small, and a large number of bubbles escape through the liquid surface before they have time to dissolve into the desulfurization slurry, resulting in a low utilization rate of dissolved oxygen in the oxidation system; in order to provide sufficient oxygen, only the power of the oxidation blower connected to the oxidation air duct in the oxidation system can be increased, which in turn leads to a significant increase in the energy consumption of the oxidation blower.

[0008] The present invention provides a device for improving the oxidation efficiency of desulfurization slurry, comprising:

[0009] A bottom plate, which is horizontally arranged; at positions near both ends of the bottom plate, it is suitable to introduce oxidation air through the air outlet holes provided on the oxidation air branch pipes;

[0010] Two symmetrically arranged first plate members, which are inclined; both ends of the bottom plate are respectively connected to the lower ends of the two first plate members;

[0011] Two symmetrically arranged second plate members, which are inclined; the lower ends of the two second plate members are respectively connected to the upper ends of the two first plate members; the first plate member intersects with the second plate member and is arranged in a horizontal V shape; at positions near the upper ends of the first plate member, a plurality of first holes are provided; at positions near the upper ends of the second plate member, a plurality of second holes are provided;

[0012] A first connecting plate, which is horizontally arranged; both ends of the first connecting plate are respectively connected to the upper ends of the two second plate members;

[0013] Two first side plates are respectively connected to both sides of the bottom plate, the first plate member, the second plate member, and the first connecting plate to form a closed first cavity;

[0014] The device for improving the oxidation efficiency of desulfurization slurry is suitable for being arranged in the desulfurization slurry. The oxidation air moves along the lower plate surface of the first plate member, then enters the first cavity through the first holes, then moves along the lower plate surface of the second plate member, and finally flows out through the second holes. Beneficial effects: By adopting the above technical solution of the present application, the oxidation air is made to move along the inclined first plate member and the second plate member, so as to extend the movement path length of the bubbles of the oxidation air in the desulfurization slurry without changing the height of the oxidation zone, increase the effective residence time of the bubbles of the oxidation air in the desulfurization slurry, that is, increase the contact time between the bubbles of the oxidation air and the desulfurization slurry, thereby increasing the dissolved amount of the oxidation air in the desulfurization slurry, significantly improving the oxidation efficiency of the desulfurization slurry, relatively reducing the height of the existing oxidation zone, strengthening the oxidation of the desulfurization slurry, and further reducing the energy consumption of the oxidation blower.

[0015] Optionally, the included angle between the first plate member and the horizontal plane is less than 30 degrees; the included angle between the second plate member and the horizontal plane is less than 30 degrees. Beneficial effects: By adopting the above technical solution, the movement stroke path of the oxidation air is increased by more than one time by limiting the inclination angles of the first plate member and the second plate member. The height of the oxidation zone of the oxidation air duct in this application can reach more than twice the height of the oxidation zone of the existing conventional oxidation air duct.

[0016] Optionally, the included angle between the first plate member and the horizontal plane is not less than 15 degrees; the included angle between the second plate member and the horizontal plane is not less than 15 degrees.

[0017] Optionally, it further includes:

[0018] Two symmetrically arranged third plate members, which are inclined. The two ends of the first connecting plate are respectively connected to the lower ends of the two third plate members;

[0019] Two symmetrically arranged fourth plate members, which are inclined. The lower ends of the two fourth plate members are respectively connected to the upper ends of the two third plate members; the third plate member and the fourth plate member intersect and are arranged in a horizontal V shape; a plurality of third holes are provided at positions close to the upper end on the third plate member; a plurality of fourth holes are provided at positions close to the upper end on the fourth plate member;

[0020] A second connecting plate, which is horizontally arranged; the two ends of the second connecting plate are respectively connected to the upper ends of the two fourth plate members;

[0021] Two second side plates are respectively connected to both sides of the first connecting plate, the third plate member, the fourth plate member, and the second connecting plate to form a closed second cavity;

[0022] The device for improving the oxidation efficiency of the desulfurization slurry is also adapted to allow the oxidation air flowing out from the second hole to move along the lower plate surface of the third plate member, then enter the second cavity through the third hole, then move along the lower plate surface of the fourth plate member, and finally flow out through the fourth hole. Beneficial effects: By adopting the above technical solution, by allowing the oxidation air to move along the inclined third plate member and the fourth plate member, without changing the height of the oxidation zone, the length of the movement path of the bubbles of the oxidation air in the desulfurization slurry is extended, the effective residence time of the bubbles of the oxidation air in the desulfurization slurry is increased, that is, the contact time between the bubbles of the oxidation air and the desulfurization slurry is increased, thereby increasing the dissolved amount of the oxidation air in the desulfurization slurry, thus significantly improving the oxidation efficiency of the desulfurization slurry, relatively reducing the height of the existing oxidation zone, strengthening the oxidation of the desulfurization slurry, and further reducing the energy consumption of the oxidation fan.

[0023] Optionally, it further includes:

[0024] Two symmetrically arranged fifth plate members, which are inclined, and both ends of the second connecting plate are respectively connected to the lower ends of the two fifth plate members;

[0025] Two symmetrically arranged sixth plate members, which are inclined, and the lower ends of the two sixth plate members are respectively connected to the upper ends of the two fifth plate members; the fifth plate member intersects with the sixth plate member and is arranged in a horizontal V shape; at a position near the upper end of the fifth plate member, a plurality of fifth holes are provided, and a plurality of bubble slow-release units are provided on the lower plate surface of the fifth plate member; a plurality of sixth holes are provided on the sixth plate member;

[0026] A top plate, which is horizontally arranged; both ends of the top plate are respectively connected to the upper ends of the two sixth plate members;

[0027] Two third side plates are respectively connected to both sides of the second connecting plate, the fifth plate member, the sixth plate member, and the top plate to form a closed third cavity;

[0028] The device for improving the oxidation efficiency of desulfurized slurry is also adapted to enable the oxidation air flowing out from the fourth hole to move along the bubble slow-release unit on the lower plate surface of the fifth plate member, then enter the third cavity through the fifth hole, then move along the lower plate surface of the sixth plate member, and finally flow out through the sixth hole. Beneficial effects: By adopting the above technical solution, the application enables the oxidation air to move along the inclined fifth plate member and sixth plate member, so as to extend the movement path length of the bubbles of the oxidation air in the desulfurized slurry without changing the height of the oxidation zone, increase the effective residence time of the bubbles of the oxidation air in the desulfurized slurry, that is, increase the contact time between the bubbles of the oxidation air and the desulfurized slurry, thereby increasing the dissolution amount of the oxidation air in the desulfurized slurry, significantly improving the oxidation efficiency of the desulfurized slurry, relatively reducing the height of the existing oxidation zone, strengthening the oxidation of the desulfurized slurry, and further reducing the energy consumption of the oxidation fan; and further increasing the residence time of the bubbles of the oxidation air in the desulfurized slurry by arranging the bubble slow-release unit.

[0029] Optionally, a first flow guide plate parallel to the second plate member is provided on the upper plate surface of the first plate member, and the upper end of the first flow guide plate is located below the first connecting plate; a plurality of seventh holes are provided on the first plate member, and the seventh holes are located below the first flow guide plate; a plurality of first communication holes for communicating the first chamber and the second chamber are provided on the first connecting plate; the size of the seventh hole is smaller than the size of the first hole;

[0030] On the upper plate surface of the third plate member, a second flow guide plate parallel to the fourth plate member is provided, and the upper end of the second flow guide plate is located below the second connection plate; on the third plate member, a plurality of eighth holes are provided, and the eighth holes are located below the second flow guide plate; on the second connection plate, a plurality of second communication holes for communicating the second chamber and the third chamber are provided; on the top plate, a plurality of third communication holes for communicating the third chamber and the outside are provided; the size of the eighth holes is smaller than the size of the third holes;

[0031] The device for improving the oxidation efficiency of desulfurized slurry is also adapted to allow the oxidation air to move along the lower plate surface of the first plate member, enter the first chamber through the seventh hole, then move along the lower plate surface of the first flow guide plate, and then flow out successively through the first communication hole, the second chamber, the second communication hole, the third chamber and the third communication hole; and is also adapted to allow the oxidation air flowing out of the second hole to enter the second chamber through the eighth hole, then move along the lower plate surface of the second flow guide plate, and then flow out successively through the second communication hole, the third chamber and the third communication hole. Beneficial effects: By adopting the above technical solution, the present application breaks the large bubbles of the oxidation air into small bubbles by limiting the sizes of the seventh hole and the eighth hole, effectively reducing the bubble size of the oxidation air, thereby improving the uniformity of the oxidation air bubbles and significantly improving the oxidation efficiency of the oxidation air output by the oxidation air pipe; further, by providing the first flow guide plate and the second flow guide plate for partitioning the bubbles, a part of the bubbles of the oxidation air is diverted to the central position, improving the distribution uniformity of the oxidation air, that is, further improving the uniformity of the oxidation air bubbles in the desulfurized slurry and significantly improving the oxidation efficiency of the desulfurized slurry.

[0032] Optionally, a first baffle is connected to the lower end of the second plate member along the extending direction of the second plate member; a second baffle is connected to the lower end of the fourth plate member along the extending direction of the fourth plate member; a third baffle is connected to the lower end of the sixth plate member along the extending direction of the sixth plate member; a plurality of bubble slow-release units are provided on the lower plate surfaces of the first baffle, the second baffle and the third baffle. Beneficial effects: By adopting the above technical solution, the first baffle functions to block the oxidation air bubbles, so that the oxidation air bubbles preferentially pass through the first hole and the sixth hole on the first plate member, and a small part of the oxidation air bubbles flow out through the edge of the first baffle. The second baffle functions to block the oxidation air bubbles, so that the oxidation air bubbles preferentially pass through the third hole and the eighth hole on the third plate member, and a small part of the oxidation air bubbles flow out through the edge of the second baffle. The third baffle functions to block the oxidation air bubbles, so that the oxidation air bubbles preferentially pass through the fifth hole on the fifth plate member, and a small part of the oxidation air bubbles flow out through the edge of the third baffle; and further, by providing the bubble slow-release units, the residence time of the oxidation air bubbles in the desulfurized slurry is increased.

[0033] Optionally, partition plates are provided on the lower plate surfaces of the first connection plate, the second connection plate, and the top plate, all of which are arranged vertically; the partition plates are perpendicular to the first side plate. Beneficial effects: By adopting the above technical solution, the present application partitions the oxidation air bubbles through the partition plates, further improving the uniformity of the distribution of oxidation air in the desulfurization slurry.

[0034] Optionally, the bubble slow-release unit is a plurality of semi-circular protrusions arranged along the length direction of the fifth plate member, and the plurality of semi-circular protrusions are arranged at intervals.

[0035] Optionally, the outer part of the connection position between the bottom plate and the first plate member is a first arc surface structure, and a corresponding second arc surface structure is provided on the first side plate at the position corresponding to the first arc surface structure; the oxidation air branch pipe is installed in the first arc surface structure and the second arc surface structure. Beneficial effects: By adopting the above technical solution, it is convenient to install and set the oxidation air branch pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 It is a schematic cross-sectional structure diagram of the device for improving the oxidation efficiency of desulfurization slurry provided in the embodiments of the present invention;

[0038] Figure 2 It is a schematic diagram of the distribution of the first hole and the sixth hole on the first plate member provided in the embodiments of the present invention;

[0039] Figure 3 It is a schematic diagram of the distribution of the seventh hole on the sixth plate member provided in the embodiments of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of the first side plate provided in the embodiments of the present invention;

[0041] Figure 5 It is a schematic diagram of the structure of the second side plate provided in the embodiments of the present invention;

[0042] Figure 6 It is a schematic diagram of the structure of the first deflector provided in the embodiments of the present invention;

[0043] Figure 7 It is a schematic diagram of the structure of the partition plate provided in the embodiments of the present invention;

[0044] Figure 8 Schematic connection diagram of the partition provided in the embodiment of the present invention;

[0045] Figure 9 Schematic diagram of the movement path of oxidation air in the device for improving the oxidation efficiency of desulfurization slurry provided in the embodiment of the present invention;

[0046] Figure 10 Schematic diagram of the first movement path of oxidation air in the device for improving the oxidation efficiency of desulfurization slurry provided in the embodiment of the present invention;

[0047] Figure 11 Schematic diagram of the second movement path of oxidation air in the device for improving the oxidation efficiency of desulfurization slurry provided in the embodiment of the present invention;

[0048] Figure 12 Schematic diagram of the third movement path of oxidation air in the device for improving the oxidation efficiency of desulfurization slurry provided in the embodiment of the present invention;

[0049] Figure 13 Schematic comparison diagram of the movement paths of oxidation air on the inclined plane and on the vertical plane provided in the embodiment of the present invention;

[0050] Figure 14 Schematic comparison diagram of the oxidation air in different movement path directions provided in the embodiment of the present invention.

[0051] Explanation of reference numerals:

[0052] 1, bottom plate; 2, oxidation air branch pipe; 3, air outlet hole; 4, first plate member; 5, second plate member; 6, first hole; 7, first connecting plate; 8, first side plate; 9, third plate member; 10, fourth plate member; 11, second connecting plate; 12, second side plate; 13, fifth plate member; 14, sixth plate member; 15, top plate; 16, sixth hole; 17, bubble slow-release unit; 18, first deflector; 19, seventh hole; 20, second deflector; 21, first baffle; 22, second baffle; 23, third baffle; 24, partition. Detailed implementation manners

[0053] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0054] The applicant analyzed the oxidation of desulfurization slurry, and found that there are three main factors leading to the low oxidation efficiency of the existing desulfurization slurry. First, the size of the oxidation air bubbles generated by the oxidation air pipe is large, the surface area is small, and the buoyancy is large, resulting in a short residence time of the oxidation air in the desulfurization slurry, and then reducing the dissolution amount of the oxidation air in the desulfurization slurry. Generally, the problem of low oxidation efficiency of the desulfurization slurry can only be compensated by increasing the air volume of the oxidation blower. When selecting the oxidation blower, it is generally selected according to three times the actual oxidation air consumption, resulting in a high energy consumption of the oxidation blower. Second, the height of the oxidation zone is low. The height of the oxidation zone of the desulfurization absorption tower is generally 3 meters to 4 meters, especially in the low liquid level operation condition, it is generally about 2 meters to 2.5 meters; in addition, the overflow problem of the desulfurization absorption tower is relatively common. To solve the above problems, the operating personnel will artificially reduce the liquid level height of the absorption tower, resulting in a further reduction in the height of the oxidation zone, seriously reducing the residence time of the oxidation air in the desulfurization slurry. If the oxidation air pipe is further lowered, the pipeline pressure that the oxidation blower needs to overcome will increase significantly, further increasing the energy consumption of the oxidation blower. Generally, for every 10 cm reduction of the oxidation air pipe, the pressure that the oxidation blower needs to increase for the desulfurization slurry is 11 kPa. Third, the uniformity of the oxidation air in the desulfurization slurry is poor. The large-sized oxidation air bubbles generated by the oxidation air pipe are easy to merge and aggregate during the rising process, generating larger-sized oxidation air bubbles, resulting in a worse uniformity of the oxidation air. Based on the above analysis, this application proposes a device for improving the oxidation efficiency of desulfurization slurry.

[0055] As Figures 1 to 14 shown in a specific embodiment of the device for improving the oxidation efficiency of desulfurization slurry, it includes: a bottom plate 1, two symmetrically arranged first plate members 4, two symmetrically arranged second plate members 5, a first connecting plate 7 and two first side plates 8. The two first plate members 4 are symmetric left and right, and the two second plate members 5 are symmetric left and right.

[0056] Referring to Figure 1 shown, the bottom plate 1 is horizontally arranged; at positions near both ends of the bottom plate 1, it is suitable to introduce oxidation air through the air outlet holes 3 provided on the oxidation air branch pipe 2. The two symmetrically arranged first plate members 4 are inclined, and both ends of the bottom plate 1 are respectively connected to the lower ends of the two first plate members 4. The two symmetrically arranged second plate members 5 are inclined, and the lower ends of the two second plate members 5 are respectively connected to the upper ends of the two first plate members 4; the first plate member 4 intersects with the second plate member 5, showing a horizontal V-shaped arrangement.

[0057] Referring to Figure 1 、 Figure 2 and Figure 4As shown, a plurality of first holes 6 are provided at a position near the upper end of the first plate member 4; a plurality of second holes are provided at a position near the upper end of the second plate member 5. The first connecting plate 7 is horizontally arranged; both ends of the first connecting plate 7 are respectively connected to the upper ends of the two second plate members 5. Two first side plates 8 are respectively connected to both sides of the bottom plate 1, the first plate member 4, the second plate member 5, and the first connecting plate 7 to form a closed first cavity.

[0058] Reference Figure 9 and Figure 10 As shown, the device for improving the oxidation efficiency of desulfurized slurry is adapted to be arranged in the desulfurized slurry. The oxidation air moves along the lower plate surface of the first plate member 4, enters the first cavity through the first holes 6, then moves along the lower plate surface of the second plate member 5, and finally flows out through the second holes.

[0059] Specifically, the included angle between the first plate member 4 and the horizontal plane is less than 30 degrees; the included angle between the second plate member 5 and the horizontal plane is less than 30 degrees. The connection position between the first plate member 4 and the second plate member 5 can be connected by an acute angle, a chamfer, or other smooth transition methods.

[0060] More specifically, the included angle between the first plate member 4 and the horizontal plane is not less than 15 degrees; the included angle between the second plate member 5 and the horizontal plane is not less than 15 degrees. Of course, the included angle between the first plate member 4 and the horizontal plane is not less than 20 degrees; the included angle between the second plate member 5 and the horizontal plane is not less than 20 degrees.

[0061] Further, with reference to Figure 1 、 Figure 2 and Figure 5 As shown, the device for improving the oxidation efficiency of desulfurized slurry according to the present application further includes: two symmetrically arranged third plate members 9, two symmetrically arranged fourth plate members 10, a second connecting plate 11, and two second side plates 12. The two third plate members 9 are symmetrically arranged left and right, and the two fourth plate members 10 are symmetrically arranged left and right.

[0062] The two symmetrically arranged third plate members 9 are inclined. Both ends of the first connecting plate 7 are respectively connected to the lower ends of the two third plate members 9. The two symmetrically arranged fourth plate members 10 are inclined. The lower ends of the two fourth plate members 10 are respectively connected to the upper ends of the two third plate members 9; the third plate members 9 and the fourth plate members 10 intersect and are arranged in a horizontal V shape; a plurality of third holes are provided at a position near the upper end of the third plate members 9; the setting of the third holes can refer to the setting of the first holes 6. A plurality of fourth holes are provided at a position near the upper end of the fourth plate members 10. The second connecting plate 11 is horizontally arranged; both ends of the second connecting plate 11 are respectively connected to the upper ends of the two fourth plate members 10. Two second side plates 12 are respectively connected to both sides of the first connecting plate 7, the third plate members 9, the fourth plate members 10, and the second connecting plate 11 to form a closed second cavity.

[0063] Reference Figure 9 and Figure 10 As shown, the device for improving the oxidation efficiency of desulfurization slurry is also adapted to allow the oxidation air flowing out of the second hole to move along the lower plate surface of the third plate member 9, then enter the second cavity through the third hole, then move along the lower plate surface of the fourth plate member 10, and finally flow out through the fourth hole.

[0064] Specifically, the included angle between the third plate member 9 and the horizontal plane is less than 30 degrees; the included angle between the fourth plate member 10 and the horizontal plane is less than 30 degrees. At the connection position between the third plate member 9 and the fourth plate member 10, an acute angle, chamfer or other smooth transition method can be adopted for connection.

[0065] More specifically, the included angle between the third plate member 9 and the horizontal plane is not less than 15 degrees; the included angle between the fourth plate member 10 and the horizontal plane is not less than 15 degrees. Of course, the included angle between the third plate member 9 and the horizontal plane is not less than 20 degrees; the included angle between the fourth plate member 10 and the horizontal plane is not less than 20 degrees.

[0066] Furthermore, as Figure 1 、 Figure 3 and Figure 5 shown, the device for improving the oxidation efficiency of desulfurization slurry described in the present application further includes: two symmetrically arranged fifth plate members 13, two symmetrically arranged sixth plate members 14, a top plate 15 and two third side plates. The two fifth plate members 13 are symmetric left and right, and the two sixth plate members 14 are symmetric left and right.

[0067] The two symmetrically arranged fifth plate members 13 are inclined. The two ends of the second connecting plate 11 are respectively connected to the lower ends of the two fifth plate members 13. The two symmetrically arranged sixth plate members 14 are inclined. The lower ends of the two sixth plate members 14 are respectively connected to the upper ends of the two fifth plate members 13; the fifth plate members 13 and the sixth plate members 14 intersect and are arranged in a horizontal V shape; at a position near the upper end of the fifth plate member 13, a plurality of fifth holes are provided, and a plurality of bubble slow-release units 17 are provided on the lower plate surface of the fifth plate member 13. Specifically, the bubble slow-release unit 17 is a plurality of semi-circular protrusions arranged along the length direction of the fifth plate member 13, and the plurality of semi-circular protrusions are arranged at intervals. The plurality of semi-circular protrusions are evenly distributed. The semi-circular protrusions can be made of steel pipes with a certain thickness and diameter, and are evenly divided into two semi-circular pipes with a semi-circular cross-section along the diameter.

[0068] A plurality of sixth holes 16 are provided on the sixth plate member 14, and the plurality of sixth holes 16 are evenly distributed. The top plate 15 is horizontally arranged; both ends of the top plate 15 are respectively connected to the upper ends of two sixth plate members 14. Two third side plates are respectively connected to both sides of the second connecting plate 11, the fifth plate member 13, the sixth plate member 14, and the top plate 15 to form a closed third cavity. The arrangement of the third side plate can refer to the arrangement of the second side plate 12.

[0069] As Figure 9 and Figure 10 shown, the device for improving the oxidation efficiency of desulfurized slurry is also adapted to allow the oxidation air flowing out from the fourth hole to move along the bubble slow-release unit 17 on the lower plate surface of the fifth plate member 13, then enter the third cavity through the fifth hole, then move along the lower plate surface of the sixth plate member 14, and finally flow out from the sixth hole 16 to form a first movement path.

[0070] The device for improving the oxidation efficiency of desulfurized slurry described in this application forms a three-stage V-shaped folded plate structure. Of course, the three-stage V-shaped folded plate structure described in this application can be extended to a multi-stage V-shaped folded plate structure, which is substantially the same as the technical solution of this application.

[0071] Specifically, the included angle between the fifth plate member 13 and the horizontal plane is less than 30 degrees; the included angle between the sixth plate member 14 and the horizontal plane is less than 30 degrees. The connection position between the fifth plate member 13 and the sixth plate member 14 can be connected by an acute angle, a chamfer, or other smooth transition methods.

[0072] More specifically, the included angle between the fifth plate member 13 and the horizontal plane is not less than 15 degrees; the included angle between the sixth plate member 14 and the horizontal plane is not less than 15 degrees. Of course, the included angle between the fifth plate member 13 and the horizontal plane is not less than 20 degrees; the included angle between the sixth plate member 14 and the horizontal plane is not less than 20 degrees.

[0073] Further, as Figure 1 , Figure 2 and Figure 6As shown, on the upper plate surface of the first plate member 4, a first flow guide plate 18 parallel to the second plate member 5 is provided, and the upper end of the first flow guide plate 18 is located below the first connecting plate 7; on the first plate member 4, a plurality of seventh holes 19 are provided, and the seventh holes 19 are located below the first flow guide plate 18; on the first connecting plate 7, a plurality of first communication holes for communicating the first chamber and the second chamber are provided; the size of the seventh holes 19 is smaller than the size of the first holes 6, the seventh holes 19 are small holes, and the first holes 6 are large holes. On the upper plate surface of the third plate member 9, a second flow guide plate 20 parallel to the fourth plate member 10 is provided, and the upper end of the second flow guide plate 20 is located below the second connecting plate 11; on the third plate member 9, a plurality of eighth holes are provided, and the eighth holes are located below the second flow guide plate 20; on the second connecting plate 11, a plurality of second communication holes for communicating the second chamber and the third chamber are provided; on the top plate 15, a plurality of third communication holes for communicating the third chamber and the outside are provided; the size of the eighth holes is smaller than the size of the third holes, the eighth holes are small holes, and the third holes are large holes. The setting of the eighth holes can refer to the setting of the seventh holes 19. The setting of the second flow guide plate 20 can refer to the setting of the first flow guide plate 18. The first flow guide plate 18 and the second flow guide plate 20 are both made of stainless steel plates with a certain thickness, both are rectangular structures, and both are composed of vertical frames and horizontal frames. The horizontal frame of the first flow guide plate 18 is connected to the first side plate 8 by welding or integral molding, and the horizontal frame of the second flow guide plate 20 is connected to the second side plate 12 by welding or integral molding.

[0074] As Figure 9 and Figure 11 shown, the device for improving the oxidation efficiency of desulfurized slurry is also suitable for the oxidation air to move along the lower plate surface of the first plate member 4, enter the first chamber through the seventh holes 19, then move along the lower plate surface of the first flow guide plate 18, and then flow out successively through the first communication holes, the second chamber, the second communication holes, the third chamber and the third communication holes; and the device for improving the oxidation efficiency of desulfurized slurry is also suitable for the oxidation air flowing out of the second holes to enter the second chamber through the eighth holes, then move along the lower plate surface of the second flow guide plate 20, and then flow out successively through the second communication holes, the third chamber and the third communication holes to form a second movement path.

[0075] Further, as Figure 1As shown in the figure, a first baffle 21 extending along the extension direction of the second plate member 5 is connected to the lower end of the second plate member 5; a second baffle 22 extending along the extension direction of the fourth plate member 10 is connected to the lower end of the fourth plate member 10; a third baffle 23 extending along the extension direction of the sixth plate member 14 is connected to the lower end of the sixth plate member 14; a plurality of bubble slow-release units 17 are provided on the lower plate surfaces of the first baffle 21, the second baffle 22 and the third baffle 23. The first baffle 21, the second baffle 22 and the third baffle 23 are all made of stainless steel plates with a certain thickness and are all rectangular structures. The first baffle 21 is connected to the second plate member 5 by welding or integrally formed, and its purpose is to block the oxidation air bubbles, so that the oxidation air bubbles preferentially pass through the first hole 6 and the sixth hole 16 on the first plate member 4, and a small part of the oxidation air bubbles flow out through the edge of the first baffle 21. The second baffle 22 is connected to the fourth plate member 10 by welding or integrally formed, and its purpose is to block the oxidation air bubbles, so that the oxidation air bubbles preferentially pass through the third hole and the eighth hole on the third plate member 9, and a small part of the oxidation air bubbles flow out through the edge of the second baffle 22. The third baffle 23 is connected to the sixth plate member 14 by welding or integrally formed, and its purpose is to block the oxidation air bubbles, so that the oxidation air bubbles preferentially pass through the fifth hole on the fifth plate member 13, and a small part of the oxidation air bubbles flow out through the edge of the third baffle 23.

[0076] Further, as Figure 1 , Figure 7 and Figure 8 shown, partition plates 24 arranged in the vertical direction are provided on the lower plate surfaces of the first connecting plate 7, the second connecting plate 11 and the top plate 15; the partition plates 24 are perpendicular to the first side plate 8. The partition plates 24 are made of steel plates or channel steels with a certain thickness and are rectangular structures; the first connecting plate 7, the second connecting plate 11 and the top plate 15 are all composed of vertical frames and horizontal frames. Among them, the horizontal frame of the first connecting plate 7 is connected to the first side plate 8, the horizontal frame of the second connecting plate 11 is connected to the second side plate 12, and the horizontal frame of the top plate 15 is connected to the third side plate. The purpose of setting the partition plates 24 is to partition the oxidation air bubbles and further improve the distribution uniformity of the oxidation air in the desulfurization slurry.

[0077] Further, as Figure 1 and Figure 4 shown, the connection position between the bottom plate 1 and the first plate member 4 is an external first arc surface structure, and a corresponding second arc surface structure is provided on the first side plate 8 corresponding to the first arc surface structure; the oxidation air branch pipe 2 is installed in the first arc surface structure and the second arc surface structure.

[0078] Specifically, the first hole 6, the third hole, the seventh hole 19, and the eighth hole in the present application may all be circular holes.

[0079] As Figure 1 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 shown, the working process principle of the device for improving the oxidation efficiency of desulfurization slurry in the present application is briefly described as follows: The oxidation air provided by the oxidation blower enters the network-type oxidation air branch pipe 2 through the air inlet of the oxidation air branch pipe 2, and then enters the desulfurization slurry through the air outlet hole 3. Thereafter, the oxidation air bubbles move in the desulfurization slurry along three movement paths. Among them, Figures 9 to 12 the arrows in

[0080] As Figure 10 shown, the first movement path is: Most of the oxidation air bubbles move along the first plate member 4, the second plate member 5, the third plate member 9, the fourth plate member 10, the fifth plate member 13, and the sixth plate member 14. Among them, when passing through the fifth plate member 13, after being blocked by the multi-stage bubble slow-release unit 17, they enter the third chamber and then flow out through the sixth hole 16 of the sixth plate member 14.

[0081] As Figure 11 shown, the second movement path is: A part of the oxidation air bubbles enter the first chamber through the seventh hole 19. Under the action of the seventh hole 19, the large bubbles become small bubbles. Under the guiding action of the first guiding plate 18, they then further pass through the partition plate 24 and flow out successively through the first communication hole, the second chamber, the second communication hole, the third chamber, and the third communication hole; and the oxidation air flowing out of the second hole enters the second chamber through the eighth hole, and then moves along the lower plate surface of the second guiding plate 20, and then successively flows out through the second communication hole, the third chamber, and the third communication hole.

[0082] As Figure 12 shown, the third movement path is: A small amount of oxidation air bubbles flow out from the edges of the first baffle 21, the second baffle 22, and the third baffle 23.

[0083] The oxidation air bubbles moving through the first movement path and the second movement path have an extended movement stroke due to moving along the inclined surface. As Figure 13As shown by the vertical line in [description], the running track of the oxidation air bubbles in the conventional oxidation air duct is perpendicular to the liquid surface of the desulfurization slurry. The oblique line is the running track of the oxidation air bubbles in the technical solution of the present application. When the inclination angle is 30°, the moving length of the conventional oxidation air bubbles is twice that of the oxidation air bubbles in the technical solution of the present application. When the inclination angle of the present application's technical solution is less than 30°, the residence time of the oxidation air bubbles in the desulfurization slurry is increased by more than twice. Due to the blocking effect of the first baffle 21, the second baffle 22 and the third baffle 23, the residence time of the oxidation air bubbles passing through the third movement path in the desulfurization slurry is significantly increased.

[0084] Verified by the results of numerous experiments, such as Figure 14 shown, when the angle between the movement path of the oxidation air bubbles and the horizontal direction increases from small to large, the movement speed of the oxidation air bubbles first increases and then decreases. When the angle between the movement path of the oxidation air bubbles and the horizontal direction is 45°, the movement speed of the oxidation air bubbles reaches the maximum value. The movement speed of the oxidation air bubbles when the angle between the movement path of the oxidation air bubbles and the horizontal direction is 30° is equivalent to the movement speed of the oxidation air bubbles when the angle between the movement path of the oxidation air bubbles and the horizontal direction is 90°. When the angle between the movement path of the oxidation air bubbles and the horizontal direction is <30°, the movement speed of the oxidation air bubbles is lower than the movement speed of the oxidation air bubbles when the angle between the movement path of the oxidation air bubbles and the horizontal direction is 90°. Therefore, the inclination angle adopted in the present application is controlled within 30° to reduce the running speed of the oxidation air bubbles. At this time, due to the inclination angle, the movement stroke of the oxidation air bubbles is increased by more than twice. Therefore, the residence time of the oxidation air bubbles is also increased to more than twice. After adding the bubble slow-release unit 17, the angle between the movement path of the oxidation air bubbles and the horizontal direction is -60°, which plays a role in retaining and slowly releasing the oxidation air bubbles, and also further increases the stroke path of the oxidation air bubbles. Experimental data show that the three-stage bubble slow-release unit 17 can double the residence time of the oxidation air bubbles.

[0085] In summary, the technical solution of the present application can increase the residence time of the oxidation air bubbles in the desulfurization slurry by more than three times. According to Stokes' rule, the rising speed of the oxidation air bubbles in water is proportional to the square of the diameter of the oxidation air bubbles. The smaller the diameter of the oxidation air bubbles, the slower the rising speed of the oxidation air bubbles, and the longer the staying time of the oxidation air bubbles in water. The seventh hole 19 and the eighth hole in the technical solution adopted in the present application can convert large bubbles into small bubbles, further increasing the residence time of the oxidation air bubbles.

[0086] Further, the device for improving the oxidation efficiency of the desulfurization slurry of the present application is arranged side by side on the oxidation air branch pipe 2; and both ends of the devices for improving the oxidation efficiency of the desulfurization slurry arranged side by side are connected to the inner wall of the desulfurization absorption tower to further improve the oxidation efficiency of the desulfurization slurry.

[0087] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A device for improving the oxidation efficiency of desulfurized slurry, characterized in that: include: The bottom plate (1) is arranged horizontally; positions near both ends of the bottom plate (1) are suitable for introducing oxidation air through air outlet holes (3) provided on the oxidation air branch pipe (2); Two symmetrically arranged first plates (4) are arranged obliquely, and the two ends of the bottom plate (1) are respectively connected to the lower ends of the two first plates (4); Two symmetrically arranged second plates (5) are arranged obliquely, and the lower ends of the two second plates (5) are respectively connected to the upper ends of the two first plates (4); the first plate (4) and the second plate (5) intersect and are arranged in a transverse V-shape; a plurality of first holes (6) are arranged near the upper end of the first plate (4); and a plurality of second holes are arranged near the upper end of the second plate (5); A first connecting plate (7) is arranged horizontally; two ends of the first connecting plate (7) are respectively connected to the upper ends of the two second plates (5); Two first side plates (8) are respectively connected to the bottom plate (1), the first plate member (4), the second plate member (5), and two sides of the first connecting plate (7) to form a closed first cavity; The device for improving the oxidation efficiency of the desulfurized slurry is suitable for being arranged in the desulfurized slurry, and the oxidizing air moves along the lower plate surface of the first plate (4), then enters the first cavity through the first hole (6), then moves along the lower plate surface of the second plate (5), and finally flows out through the second hole.

2. The device for improving the oxidation efficiency of desulfurized slurry according to claim 1, characterized in that: The angle between the first plate (4) and the horizontal plane is less than 30 degrees; the angle between the second plate (5) and the horizontal plane is less than 30 degrees.

3. The device for improving the oxidation efficiency of desulfurized slurry according to claim 2, characterized in that: The angle between the first plate (4) and the horizontal plane is not less than 15 degrees; the angle between the second plate (5) and the horizontal plane is not less than 15 degrees.

4. The device for improving the oxidation efficiency of desulfurized slurry according to claim 1, characterized in that: Also includes: Two symmetrically arranged third plates (9) are arranged obliquely, and the two ends of the first connecting plate (7) are respectively connected to the lower ends of the two third plates (9); Two symmetrically arranged fourth plates (10) are arranged obliquely, and the lower ends of the two fourth plates (10) are respectively connected to the upper ends of the two third plates (9); the third plate (9) and the fourth plate (10) intersect and are arranged in a transverse V-shape; a plurality of third holes are arranged near the upper end of the third plate (9); and a plurality of fourth holes are arranged near the upper end of the fourth plate (10); A second connecting plate (11) is arranged horizontally; two ends of the second connecting plate (11) are respectively connected to the upper ends of the two fourth plates (10); Two second side plates (12) are respectively connected to the first connecting plate (7), the third plate member (9), the fourth plate member (10), and two sides of the second connecting plate (11) to form a closed second cavity; The device for improving the oxidation efficiency of the desulfurized slurry is also suitable for the oxidation air flowing out of the second hole to move along the lower plate surface of the third plate (9), then enter the second cavity through the third hole, then move along the lower plate surface of the fourth plate (10), and finally flow out through the fourth hole.

5. The device for improving the oxidation efficiency of desulfurized slurry according to claim 4, characterized in that: Also includes: Two symmetrically arranged fifth plates (13) are arranged obliquely, and the two ends of the second connecting plate (11) are respectively connected to the lower ends of the two fifth plates (13); Two symmetrically arranged sixth plates (14) are arranged obliquely, and the lower ends of the two sixth plates (14) are respectively connected to the upper ends of the two fifth plates (13); the fifth plate (13) and the sixth plate (14) intersect and are arranged in a transverse V-shape; a plurality of fifth holes are arranged near the upper end of the fifth plate (13), and a plurality of bubble release units (17) are arranged on the lower plate surface of the fifth plate (13); and a plurality of sixth holes (16) are arranged on the sixth plate (14); A top plate (15) is arranged horizontally; two ends of the top plate (15) are respectively connected to the upper ends of the two sixth plates (14); Two third side plates are respectively connected to two sides of the second connecting plate (11), the fifth plate (13), the sixth plate (14), and the top plate (15) to form a closed third cavity; The device for improving the oxidation efficiency of the desulfurized slurry is also suitable for the oxidizing air flowing out from the fourth hole to move along the bubble release unit (17) on the lower plate surface of the fifth plate (13), then enter the third cavity through the fifth hole, then move along the lower plate surface of the sixth plate (14), and finally flow out from the sixth hole (16).

6. The device for improving the oxidation efficiency of desulfurized slurry according to claim 5, characterized in that: A first guide plate (18) parallel to the second plate (5) is provided on the upper plate surface of the first plate (4), the upper end of the first guide plate (18) being located below the first connecting plate (7); a plurality of seventh holes (19) are provided on the first plate (4), the seventh holes (19) being located below the first guide plate (18); a plurality of first connecting holes connecting the first chamber and the second chamber are provided on the first connecting plate (7); the size of the seventh hole (19) is smaller than the size of the first hole (6); A second guide plate (20) parallel to the fourth plate (10) is provided on the upper plate surface of the third plate (9), the upper end of the second guide plate (20) being located below the second connecting plate (11); a plurality of eighth holes are provided on the third plate (9), the eighth holes being located below the second guide plate (20); a plurality of second connecting holes connecting the second chamber and the third chamber are provided on the second connecting plate (11); a plurality of third connecting holes connecting the third chamber and the outside are provided on the top plate (15); the size of the eighth hole is smaller than the size of the third hole; The device for improving the oxidation efficiency of the desulfurized slurry is also suitable for the oxidizing air to move along the lower plate surface of the first plate (4), enter the first cavity through the seventh hole (19), and then move along the lower plate surface of the first guide plate (18), and then flow out through the first connecting hole, the second cavity, the second connecting hole, the third cavity and the third connecting hole in sequence; and is also suitable for the oxidizing air flowing out of the second hole to enter the second cavity through the eighth hole, and then move along the lower plate surface of the second guide plate (20), and then flow out through the second connecting hole, the third cavity, and the third connecting hole in sequence.

7. The device for improving the oxidation efficiency of desulfurized slurry according to claim 5, characterized in that: A first baffle (21) is connected to the lower end of the second plate (5) along the extension direction of the second plate (5); a second baffle (22) is connected to the lower end of the fourth plate (10) along the extension direction of the fourth plate (10); a third baffle (23) is connected to the lower end of the sixth plate (14) along the extension direction of the sixth plate (14); and a plurality of bubble release units (17) are provided on the lower plate surfaces of the first baffle (21), the second baffle (22) and the third baffle (23).

8. The device for improving the oxidation efficiency of desulfurized slurry according to any one of claims 5 to 7, characterized in that: A partition plate (24) arranged in a vertical direction is provided on the lower plate surfaces of the first connecting plate (7), the second connecting plate (11) and the top plate (15); the partition plate (24) is perpendicular to the first side plate (8).

9. The device for improving the oxidation efficiency of desulfurized slurry according to any one of claims 5 to 7, characterized in that: The bubble slow-release unit (17) is a plurality of semicircular protrusions arranged along the length direction of the fifth plate (13), and the plurality of semicircular protrusions are arranged at intervals.

10. The device for improving the oxidation efficiency of desulfurized slurry according to any one of claims 1 to 7, characterized in that: A first arc surface structure is provided outside the connection position between the bottom plate (1) and the first plate (4), and a corresponding second arc surface structure is provided on the first side plate (8) corresponding to the first arc surface structure; the oxidation air branch pipe (2) is installed inside the first arc surface structure and the second arc surface structure.

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