Tail gas treatment device for calcium nitrate reaction tower

Abstract

The utility model relates to the technical field of tail gas treatment, and discloses a calcium nitrate reaction tower tail gas treatment device which comprises a tower body, the inner wall of the tower body is fixedly connected with two spraying rings, and the upper surfaces of the two spraying rings fixedly communicate with a plurality of first nozzles arranged circumferentially. According to the tail gas treatment device for the calcium nitrate reaction tower, through the design of the shielding ring, direct impact of waste gas on the spraying ring is effectively shielded, accumulation of dust and impurities on the spraying ring is reduced, and therefore the service life of the spraying ring is prolonged, and the maintenance cost caused by nozzle blockage is reduced; through the design of a triangular through groove in the resistance disc, uniform spraying of spraying liquid is achieved, the contact time and the contact area of waste gas and the spraying liquid are increased, the output ends of the first nozzle and the second nozzle are designed to be inclined upwards, the direct contact area of the output ends of the nozzles and smoke is reduced, and the spraying efficiency is improved. And the risk of nozzle blockage caused by deposition of dust and impurities in the flue gas is effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of tail gas treatment, and in particular to a tail gas treatment device for a calcium nitrate reaction tower. Background Art

[0002] In the calcium nitrate production process, the treatment of tail gas from the calcium nitrate reaction tower is a crucial link, which is directly related to the cleanliness of the production environment and the environmental protection standards of the exhaust gas. At present, the widely used calcium nitrate reaction tower exhaust gas treatment devices mostly rely on spray tower technology to purify harmful substances in the exhaust gas by spraying absorption liquid.

[0003] During the tail gas treatment process of the calcium nitrate reaction tower, when the flue gas flow rate is large, the existing spray tower often finds it difficult to ensure sufficient contact between the tail gas and the spray liquid, thereby affecting the tail gas purification effect. This is due to the structural design limitations of the spray tower. The spray liquid is difficult to be evenly distributed throughout the tower body, resulting in insufficient spray liquid in some areas and excess spray liquid in other areas. Utility Model Content

[0004] In response to the deficiencies in the prior art, the present application provides a calcium nitrate reaction tower tail gas treatment device, which has the advantages of high treatment efficiency and solves the problems raised in the background technology.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solution: a calcium nitrate reaction tower tail gas treatment device, comprising a tower body, wherein two spray rings are fixedly connected to the inner wall of the tower body, and the upper surfaces of the two spray rings are fixedly connected to a plurality of circumferentially arranged first nozzles, and a shielding ring is provided below each of the spray rings, and the outer surface of each shielding ring is fixedly connected to the inner wall of the tower body, and the inner wall of each shielding ring is configured to be in an upwardly inclined state;

[0006] A spray pipe is provided inside the tower body, and two groups of second nozzles are fixedly connected to the outer surface of the spray pipe. A resistance disk is provided between the two spray rings, and a plurality of circumferentially arranged through grooves are opened inside the resistance disk. The bottom end cross-section of each through groove is set to be triangular. The outer surface of the resistance disk is fixedly connected to the tower body, and the middle end of the resistance disk is rotatably connected to the spray pipe.

[0007] Through the above scheme, the shielding ring design effectively blocks the direct impact of the exhaust gas on the spray ring, reduces the accumulation of dust and impurities on the spray ring, thereby extending the service life of the spray ring and reducing the maintenance cost caused by nozzle blockage. By setting a rotatable spray pipe and multiple groups of second nozzles, combined with the triangular groove design on the resistance disk, uniform spraying of the spray liquid is achieved, and the contact time and contact area between the exhaust gas and the spray liquid are increased. The output ends of the first nozzle and the second nozzle are designed to be tilted upward. This design reduces the direct contact area between the nozzle output end and the flue gas, and effectively reduces the risk of nozzle blockage caused by the deposition of dust and impurities in the flue gas.

[0008] Furthermore, the outer surfaces of the two spray rings are fixedly connected with connecting pipes, the outer surfaces of the two connecting pipes are fixedly embedded in the tower body, and the left ends of the two connecting pipes are fixedly connected with the same delivery pipe.

[0009] Through the above solution and the provision of the delivery pipe, the purpose of delivering the absorption liquid to the spray ring can be achieved.

[0010] Furthermore, the bottom end of the delivery pipe is fixedly connected to an L-shaped pipe, the outer surface of the L-shaped pipe is fixedly embedded in the tower body, and the other end of the L-shaped pipe is rotatably connected to the bottom end of the spray pipe.

[0011] According to the above solution, the L-shaped tube is connected to the bottom end of the spray pipe through rotation, so that the absorption liquid can be continuously transported to the spray pipe during the rotation of the spray pipe.

[0012] Furthermore, the bottom end and the top end of the tower body are fixedly connected with a cross ring, and the top end and the bottom end of the spray pipe are rotatably connected to the cross ring adjacent thereto.

[0013] Through the above solution, the purpose of supporting the spray pipe can be achieved by setting the cross ring.

[0014] Furthermore, the top of the tower body is rotatably connected to a power shaft, the right end of the power shaft and the top of the spray pipe are fixedly connected to bevel gears, the two bevel gears are meshed and connected, and the left end of the power shaft is fixedly connected to the output end of the external motor.

[0015] Through the above solution, by setting up an external motor, it is possible to provide power for the rotation of the spray pipe.

[0016] Furthermore, the outer surface of the topmost cross ring is fixedly connected with a supporting rib, and the power shaft is rotatably connected to the top end of the supporting rib.

[0017] Through the above solution, by providing the supporting ribs, the power shaft can be supported and its rotational stability can be improved.

[0018] Furthermore, the output end of each of the first nozzle and the second nozzle is arranged to be inclined upward.

[0019] According to the above solution, the output ends of the first nozzle and the second nozzle are both inclined upward, which can effectively reduce the contact between the output ends of the first nozzle and the second nozzle and the flue gas, thereby effectively alleviating blockage.

[0020] Furthermore, the bottom end of the delivery pipe is connected to an external absorption liquid delivery device.

[0021] According to the above solution, the absorption liquid can be transported to the transport pipe by setting up the external absorption liquid transport device.

[0022] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0023] The calcium nitrate reaction tower tail gas treatment device, through the shielding ring design, effectively blocks the direct impact of exhaust gas on the spray ring, reduces the accumulation of dust and impurities on the spray ring, thereby extending the service life of the spray ring and reducing maintenance costs caused by nozzle blockage. Through the provision of a rotatable spray pipe and multiple groups of second nozzles, combined with the triangular groove design on the resistance disk, uniform spraying of the spray liquid is achieved, and the contact time and contact area between the exhaust gas and the spray liquid are increased. The output ends of the first nozzle and the second nozzle are both designed to be inclined upward. This design reduces the direct contact area between the nozzle output end and the flue gas, and effectively reduces the risk of nozzle blockage caused by the deposition of dust and impurities in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a cross-sectional view of the overall structure of this application;

[0025] Figure 2 This is a front view of the overall structure of this application;

[0026] Figure 3 This is the structural diagram of the resistance plate for this application;

[0027] Figure 4 This is a cross-sectional view of the resistance disk structure of this application.

[0028] In the picture:

[0029] 1. Tower body; 2. Spray ring; 3. First nozzle; 4. Shielding ring; 5. Spray pipe; 6. Second nozzle; 7. Resistance plate; 8. Through groove; 9. Connecting pipe; 10. Delivery pipe; 11. L-shaped pipe; 12. Cross ring; 13. Power shaft; 14. Bevel gear; 15. Support ribs. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0031] See also Figure 1 、 Figure 2 and Figure 3 The calcium nitrate reaction tower tail gas treatment device in this embodiment includes a tower body 1, two spray rings 2 are fixedly connected to the inner wall of the tower body 1, and the upper surfaces of the two spray rings 2 are fixedly connected to a plurality of circumferentially arranged first nozzles 3. A shielding ring 4 is provided below each spray ring 2, and the outer surface of each shielding ring 4 is fixedly connected to the inner wall of the tower body 1. The inner wall of each shielding ring 4 is set to an upward inclined state. Through the setting of the shielding ring 4, the purpose of shielding the exhaust gas can be achieved, and the direct contact between the spray ring 2 and the exhaust gas can be effectively avoided, thereby improving the service life of the spray ring 2.

[0032] See also Figure 1 、 Figure 3 and Figure 4 The top and bottom ends of the spray pipe 5 are rotatably connected to the cross ring 12 close to them. By setting the cross ring 12, the purpose of supporting the spray pipe 5 can be achieved. The outer surface of the spray pipe 5 is fixedly connected with two groups of second nozzles 6. A resistance disk 7 is provided between the two spray rings 2. The interior of the resistance disk 7 is provided with a plurality of circumferentially arranged through grooves 8. The bottom cross-section of each through groove 8 is set to be triangular. The outer surface of the resistance disk 7 is fixedly connected to the tower body 1, and the middle end of the resistance disk 7 is rotatably connected to the spray pipe 5. By setting the spray pipe 5, the purpose of rotating spraying of the two groups of second nozzles 6 can be achieved, and the uniformity of spraying can be improved. Secondly, the cross-section of the bottom end of the through groove 8 is set to be triangular, which can gradually narrow the channel and increase the contact time between the exhaust gas and the spray liquid, thereby improving the treatment effect.

[0033] See also Figure 1 、 Figure 2 and Figure 3 The output ends of each first nozzle 3 and second nozzle 6 are arranged to be inclined upward. By arranging the output ends of the first nozzle 3 and second nozzle 6 to be inclined upward, the contact between the output ends of the first nozzle 3 and second nozzle 6 and the flue gas can be effectively reduced, thereby effectively alleviating blockage.

[0034] See also Figure 1 、 Figure 2 and Figure 3The outer surfaces of the two spray rings 2 are fixedly connected with connecting pipes 9, and the outer surfaces of the two connecting pipes 9 are fixedly embedded in the tower body 1. The left ends of the two connecting pipes 9 are fixedly connected with the same delivery pipe 10. Through the arrangement of the delivery pipe 10, the purpose of delivering absorption liquid to the spray ring 2 can be achieved. The bottom end of the delivery pipe 10 is fixedly connected with an L-shaped pipe 11, and the outer surfaces of the L-shaped pipe 11 are fixedly embedded in the tower body 1. The other end of the L-shaped pipe 11 is rotatably connected to the bottom end of the spray pipe 5. Through the rotational connection between the L-shaped pipe 11 and the bottom end of the spray pipe 5, the absorption liquid can be continuously delivered to the spray pipe 5 during the rotation of the spray pipe 5.

[0035] See also Figure 1 、 Figure 2 and Figure 3 The bottom end of the delivery pipe 10 is connected to the external absorption liquid delivery device. Through the setting of the external absorption liquid delivery device, the absorption liquid can be delivered to the delivery pipe 10. The top of the tower body 1 is rotatably connected to the power shaft 13. The right end of the power shaft 13 and the top of the spray pipe 5 are fixedly connected with a bevel gear 14. The two bevel gears 14 are meshed and connected. The left end of the power shaft 13 is fixedly connected to the output end of the external motor. Through the setting of the external motor, the rotation of the spray pipe 5 can be provided with power. The outer surface of the topmost cross ring 12 is fixedly connected with a support rib 15. The power shaft 13 is rotatably connected to the top of the support rib 15. Through the setting of the support rib 15, the power shaft 13 can be supported to improve its rotation stability.

[0036] The calcium nitrate reaction tower tail gas treatment device in this embodiment effectively blocks the direct impact of exhaust gas on the spray ring 2 through the shielding ring 4 design, reduces the accumulation of dust and impurities on the spray ring 2, thereby extending the service life of the spray ring 2 and reducing the maintenance cost caused by nozzle clogging. By setting a rotatable spray pipe 5 and multiple groups of second nozzles 6, combined with the triangular groove 8 design on the resistance disk 7, uniform spraying of the spray liquid is achieved, and the contact time and contact area between the exhaust gas and the spray liquid are increased. The output ends of the first nozzle 3 and the second nozzle 6 are both designed to be inclined upward. This design reduces the direct contact area between the nozzle output end and the flue gas, and effectively reduces the risk of nozzle clogging due to the deposition of dust and impurities in the flue gas.

[0037] The working principle of the above embodiment is as follows: the tail gas generated by the calcium nitrate reaction tower is first introduced into the tower body 1. At the entrance of the tower body 1, the tail gas may contain pollutants such as particulate matter and acidic gas. The tail gas is pre-treated by spraying the absorption liquid through the spray ring 2 and the first nozzle 3 arranged in the tower body 1 to remove part of the particulate matter and acidic gas, thereby reducing the pressure of subsequent treatment. The spray pipe 5 receives the spray liquid from the external absorption liquid delivery device through the delivery pipe 10 and the L-shaped pipe 11, and rotates under the drive of the power shaft 13. The second nozzle 6 realizes 360-degree uniform spraying as the spray pipe 5 rotates, ensuring that the spray liquid can cover every corner of the tower body 1. The spray liquid is in full contact with the exhaust gas during the spraying process, undergoes physical absorption and chemical reaction, and further removes harmful substances in the exhaust gas. The multiple circumferentially arranged through grooves 8 opened inside the resistance disk 7, especially the triangular cross-section of the bottom end thereof, slows down the exhaust gas when passing through the through grooves 8. At the same time, the spray liquid forms a vortex in the through grooves 8, which increases the contact time and contact area between the exhaust gas and the spray liquid.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0039] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A calcium nitrate reaction tower tail gas treatment device, comprising a tower body (1), characterized in that: The inner wall of the tower body (1) is fixedly connected to two spray rings (2), the upper surfaces of the two spray rings (2) are fixedly connected to a plurality of circumferentially arranged first nozzles (3), a shielding ring (4) is provided below each of the spray rings (2), the outer surface of each shielding ring (4) is fixedly connected to the inner wall of the tower body (1), and the inner wall of each shielding ring (4) is set to an upwardly inclined state; A spray pipe (5) is provided inside the tower body (1), and two groups of second nozzles (6) are fixedly connected to the outer surface of the spray pipe (5). A resistance disk (7) is provided between the two spray rings (2), and a plurality of circumferentially arranged through grooves (8) are provided inside the resistance disk (7). The bottom cross-section of each through groove (8) is triangular. The outer surface of the resistance disk (7) is fixedly connected to the tower body (1), and the middle end of the resistance disk (7) is rotatably connected to the spray pipe (5).

2. The calcium nitrate reaction tower tail gas treatment device according to claim 1, wherein: The outer surfaces of the two spray rings (2) are fixedly connected to a connecting pipe (9), the outer surfaces of the two connecting pipes (9) are fixedly embedded in the tower body (1), and the left ends of the two connecting pipes (9) are fixedly connected to the same delivery pipe (10).

3. The calcium nitrate reaction tower tail gas treatment device according to claim 2, wherein: The bottom end of the delivery pipe (10) is fixedly connected to an L-shaped pipe (11), the outer surface of the L-shaped pipe (11) is fixedly embedded in the tower body (1), and the other end of the L-shaped pipe (11) is rotatably connected to the bottom end of the spray pipe (5).

4. The calcium nitrate reaction tower tail gas treatment device according to claim 1, wherein: The bottom and top ends of the tower body (1) are fixedly connected to a cross ring (12), and the top and bottom ends of the spray pipe (5) are rotatably connected to the adjacent cross rings (12).

5. The calcium nitrate reaction tower tail gas treatment device according to claim 1, wherein: The top end of the tower body (1) is rotatably connected to a power shaft (13), the right end of the power shaft (13) and the top end of the spray pipe (5) are fixedly connected to a bevel gear (14), the two bevel gears (14) are meshedly connected, and the left end of the power shaft (13) is fixedly connected to the output end of an external motor.

6. The calcium nitrate reaction tower tail gas treatment device according to claim 4, wherein: The outer surface of the topmost cross ring (12) is fixedly connected to a support rib (15), and the power shaft (13) is rotatably connected to the top of the support rib (15).

7. The calcium nitrate reaction tower tail gas treatment device according to claim 1, wherein: The output ends of each of the first nozzle (3) and the second nozzle (6) are arranged tilted upward.

8. The calcium nitrate reaction tower tail gas treatment device according to claim 2, wherein: The bottom end of the delivery pipe (10) is connected to an external absorption liquid delivery device.

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