Denitrification and denitrification tower for secondary zinc oxide processing

Abstract

The utility model discloses a denitrification and denitrification tower for processing secondary zinc oxide. The denitrification and denitrification tower comprises a preheating tower and a processing mechanism, a treatment tower is arranged on the left side of the preheating tower; the treatment mechanism comprises mounting seats, mounting plates and a mixing assembly, the mixing assembly comprises a sleeve and a spiral plate, the mounting seats which are uniformly distributed are fixedly connected to the interior of the left side of the treatment tower, the mounting plates are connected to the upper ends of the mounting seats through bolts, and through holes which are uniformly distributed are formed in the upper surfaces of the mounting plates; the upper surfaces of the mounting plates are connected with uniformly distributed sleeves through bolts, the through holes respectively correspond to the upper and lower positions of the sleeves, the sleeves are internally provided with spiral plates, and the denitrification and denitrification tower further comprises a controller which is arranged on the right side of the treatment tower. The mixed gas flow forms a plurality of spirally rising gas flows through the gas flow mixing assembly, so that the ammonia spray and the flue gas are mixed more sufficiently, and the denitrification and denitrification efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of zinc secondary oxide processing, in particular to a denitrification and denitration tower for zinc secondary oxide processing. Background Art

[0002] Secondary zinc oxide is one of the main indium-rich waste residues in the zinc smelting industry. The valuable metals contained in it, such as zinc, indium, arsenic, antimony, tin, silver, lead, cadmium, and bismuth, all have high recovery value. Especially in the situation where indium resources are relatively scarce, focusing on the extraction of rare metal indium and conducting research on the comprehensive recovery and utilization of secondary zinc oxide in zinc smelting industry waste residues is not only a full utilization of secondary resources, but also beneficial to environmental protection, with significant economic value and social benefits.

[0003] The purification of secondary zinc oxide requires high-temperature calcination, which will produce nitrogen oxides. Nitrogen oxides mostly dissolve in water to generate nitric acid. Denitrification is denitrification. When treating flue gas, the flue gas after dust removal and waste heat is usually mixed with ammonia water, and then heated and catalyzed. The flue gas and ammonia water react to become nitrogen and water. During mixing, a mixer is required for auxiliary mixing. Even so, the denitrification and denitrification of the flue gas are still between 50% and 60%, and the mixer needs to be improved. For this reason, we propose a denitrification and denitrification tower for secondary zinc oxide processing. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the existing defects and provide a denitrification and denitrification tower for zinc oxide processing. The mixed airflow is formed into multiple spiral rising airflows through the airflow mixing component, and the ammonia spray and the flue gas are mixed more fully, thereby improving the efficiency of denitrification and denitrification, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present utility model provides the following technical solutions: a denitrification and denitration tower for zinc oxide processing, comprising a preheating tower and a treatment mechanism;

[0006] Preheating tower: a treatment tower is set on its left side;

[0007] Treatment mechanism: It includes a mounting seat, a mounting plate and a mixing assembly. The mixing assembly includes a sleeve and a spiral plate. The left side of the treatment tower is fixedly connected to an evenly distributed mounting seat. The upper ends of the mounting seats are connected to the mounting plates by bolts. The upper surface of the mounting plate is provided with evenly distributed through holes. The upper surface of the mounting plate is connected to evenly distributed sleeves by bolts. The through holes correspond to the upper and lower positions of the sleeves respectively. The inside of the sleeve is provided with a spiral plate. The mixed airflow is formed into multiple spiral rising airflows through the airflow mixing assembly, and the ammonia spray and the flue gas are mixed more fully, thereby improving the efficiency of denitrification and denitrification.

[0008] Furthermore, it also includes a controller, which is arranged on the right side of the processing tower, and the input end of the controller is electrically connected to an external power supply to control the electrical appliances of the device.

[0009] Furthermore, the treatment mechanism also includes an ammonia spray gun. Ammonia spray guns are evenly distributed inside the left side of the treatment tower. The water inlets of the ammonia spray guns are connected to the water outlets of the water pumps of the external ammonia tank to spray atomized ammonia.

[0010] Furthermore, the mixing assembly also includes a fixing rod, the middle part of the sleeve is connected to the fixing rod through a nut, and the fixing rod passes through the circular hole in the middle part of the spiral plate inside the sleeve to fix the spiral plate.

[0011] Furthermore, the treatment mechanism also includes a catalytic plate, heater 1 and heater 2. The right side of the top wall of the treatment tower is fixedly connected to a uniformly distributed heater 2, and the inside of the right side of the treatment tower is fixedly connected to a uniformly distributed catalytic plate. The catalytic plates are all titanium dioxide catalytic plates. The inner wall of the right side of the treatment tower is fixedly connected to a uniformly distributed heater 1. Heater 1 is located between two adjacent catalytic plates. The input ends of heater 1 and heater 2 are electrically connected to the output end of the controller to realize the reaction between flue gas and ammonia mist.

[0012] Furthermore, it also includes a base, which is located on the left side of the preheating tower. A hot air heater is placed on the upper surface of the base. The air outlet of the hot air heater is connected to the lower end of the left side of the preheating tower. The input end of the hot air heater is electrically connected to the output end of the controller, and the flue gas is preheated while being fed in.

[0013] Furthermore, the upper inner end of the left side of the treatment tower is fixedly connected with a uniformly distributed guide plate to guide the mixed air flow to the second heating tube.

[0014] Compared with the existing technology, the beneficial effects of the utility model are: the denitrification and denitrification tower used in zinc oxide processing has the following advantages:

[0015] The flue gas after dust removal enters from the preheating tower, and the hot air blower blows out hot air to drive the flue gas into the treatment tower while preheating the flue gas. The water pump of the external ammonia tank sprays the ammonia water through the ammonia water spray gun to atomize the ammonia water. The atomized ammonia water and flue gas are mixed and pass through the sleeve. The spiral plate makes the mixed gas form a spiral upward airflow, so that the atomized ammonia water and flue gas can be fully mixed. The guide plate guides the fully mixed airflow to the heater 2. The heater 2 heats the mixed airflow, and the atomized ammonia water reacts with the flue gas to form nitrogen and water. The mixed airflow passes through each catalytic plate in turn to speed up the reaction process. Heater 1 performs temperature compensation to avoid insufficient reaction caused by temperature reduction. By improving the mixing method of flue gas and atomized ammonia water and performing temperature compensation during the reaction process, the denitrification and denitrification efficiency of the flue gas is made higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic cross-sectional view of the treatment tower of the utility model;

[0018] Figure 3 This is an enlarged structural diagram of point A of the present invention.

[0019] In the figure: 1 preheating tower, 2 treatment tower, 3 base, 4 hot air heater, 5 treatment mechanism, 51 ammonia spray gun, 52 mounting base, 53 mounting plate, 54 mixing assembly, 541 sleeve, 542 fixing rod, 543 spiral plate, 55 catalytic plate, 56 heater 1, 57 heater 2, 6 guide plate, 7 controller. DETAILED DESCRIPTION

[0020] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-3 , this embodiment provides a technical solution: a denitrification and denitrification tower for zinc oxide processing, comprising a preheating tower 1 and a treatment mechanism 5;

[0022] Preheating tower 1: a processing tower 2 is provided on its left side, and a uniformly distributed guide plate 6 is fixedly connected to the upper end of the left side of the processing tower 2;

[0023] Treatment mechanism 5: It includes a mounting seat 52, a mounting plate 53 and a mixing assembly 54. The mixing assembly 54 includes a sleeve 541 and a spiral plate 543. The left side of the treatment tower 2 is fixedly connected to the evenly distributed mounting seats 52. The upper ends of the mounting seats 52 are connected to the mounting plates 53 by bolts. The upper surface of the mounting plate 53 is provided with evenly distributed through holes. The upper surface of the mounting plate 53 is connected to evenly distributed sleeves 541 by bolts. The through holes correspond to the upper and lower positions of the sleeves 541 respectively. The interior of the sleeves 541 is provided with a spiral plate 543. The treatment mechanism 5 also includes an ammonia spray gun 51. The left side of the treatment tower 2 is provided with Ammonia spray guns 51 are evenly distributed, and the water inlets of the ammonia spray guns 51 are connected to the water outlets of the water pump of the external ammonia tank. The mixing assembly 54 also includes a fixing rod 542. The middle part of the sleeve 541 is connected to the fixing rod 542 through a nut. The fixing rod 542 passes through the circular hole in the middle of the spiral plate 543 located inside the sleeve 541. The spray nozzle of the ammonia spray gun 51 faces upward. The water pump of the external ammonia tank sprays ammonia through the ammonia spray gun 51 to atomize the ammonia. The atomized ammonia and the flue gas are mixed and then pass through the sleeve 541. The spiral plate 543 causes the mixed gas to form a spiral upward airflow, so that the atomized ammonia and the flue gas can be fully mixed.

[0024] The treatment mechanism 5 also includes a catalytic plate 55, a heater 1 56 and a heater 2 57. The right side of the top wall of the treatment tower 2 is fixedly connected to a uniformly distributed heater 2 57. The inside of the right side of the treatment tower 2 is fixedly connected to a uniformly distributed catalytic plate 55. The catalytic plates 55 are all titanium dioxide catalytic plates. The inner wall of the right side of the treatment tower 2 is fixedly connected to a uniformly distributed heater 1 56. Heater 1 56 is located between two adjacent catalytic plates 55. The input ends of heater 1 56 and heater 2 57 are electrically connected to the output end of the controller 7. The guide plate 6 guides the fully mixed airflow to heater 2 57. Heater 2 57 heats the mixed airflow. The atomized ammonia water reacts with the flue gas to form nitrogen and water. The mixed airflow passes through each catalytic plate 55 in turn to accelerate the reaction process. Heater 1 56 performs temperature compensation to avoid insufficient reaction due to temperature reduction.

[0025] Wherein: it also includes a controller 7, which is arranged on the right side of the processing tower 2, and the input end of the controller 7 is electrically connected to an external power supply.

[0026] Among them: it also includes a base 3, the base 3 is located on the left side of the preheating tower 1, and a hot air heater 4 is placed on the upper surface of the base 3. The air outlet of the hot air heater 4 is connected to the lower end of the left side of the preheating tower 1, and the input end of the hot air heater 4 is electrically connected to the output end of the controller 7. The dust-removed flue gas enters from the preheating tower 1, and the controller 7 turns on the hot air heater 4. The hot air heater 4 blows out hot air to drive the flue gas into the treatment tower 2 while preheating the flue gas.

[0027] The working principle of a denitrification and denitrification tower for secondary zinc oxide processing provided by the present invention is as follows: the flue gas after dust removal enters from the preheating tower 1, the controller 7 turns on the hot air heater 4, the hot air heater 4 blows out hot air to drive the flue gas into the treatment tower 2 while preheating the flue gas, the spray port of the ammonia water spray gun 51 is facing upward, and the water pump of the external ammonia water tank sprays the ammonia water through the ammonia water spray gun 51 to atomize the ammonia water, and the atomized ammonia water and the flue gas are mixed and then pass through the sleeve 541. The spiral plate 543 makes the mixed gas form a spiral upward airflow, so that the atomized ammonia water and the flue gas can be fully mixed, and the guide plate 6 guides the fully mixed airflow to the heater 2 57, the heater 2 57 heats the mixed airflow, and the atomized ammonia water and the flue gas react to form nitrogen and water. The mixed airflow passes through each catalytic plate 55 in turn to accelerate the reaction process, and the heater 1 56 performs temperature compensation to avoid insufficient reaction caused by temperature reduction.

[0028] It is worth noting that the controller 7 disclosed in the above embodiment can be a GCAN-PLC-326-EPLC controller, the hot air heater 4 can be an XY-24 / FD air duct heater, and the controller 7 controls the operation of the hot air heater 4, heater 1 56 and heater 2 57 using methods commonly used in the prior art.

[0029] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A denitrification and denitration tower for zinc oxide processing, characterized in that: It includes a preheating tower (1) and a processing mechanism (5); Preheating tower (1): a treatment tower (2) is provided on the left side thereof; The processing mechanism (5) comprises a mounting seat (52), a mounting plate (53) and a mixing assembly (54), wherein the mixing assembly (54) comprises a sleeve (541) and a spiral plate (543). The left side of the processing tower (2) is fixedly connected to the interior of the mounting seat (52) and the mounting plate (53) is connected to the upper end of the mounting seat (52) by bolts. The upper surface of the mounting plate (53) is provided with evenly distributed through holes. The upper surface of the mounting plate (53) is connected to the evenly distributed sleeves (541) by bolts. The through holes correspond to the upper and lower positions of the sleeves (541) respectively. The interior of the sleeves (541) is provided with a spiral plate (543).

2. The denitrification and denitration tower for zinc oxide processing according to claim 1, characterized in that: The device further comprises a controller (7), which is arranged on the right side of the treatment tower (2), and an input end of the controller (7) is electrically connected to an external power supply.

3. The denitrification and denitration tower for secondary zinc oxide processing according to claim 1, characterized in that: The treatment mechanism (5) further comprises an ammonia water spray gun (51). The ammonia water spray guns (51) are evenly distributed inside the left side of the treatment tower (2). The water inlets of the ammonia water spray guns (51) are all connected to the water outlet of the water pump of the external ammonia water tank.

4. The denitrification and denitration tower for zinc oxide processing according to claim 1, characterized in that: The mixing assembly (54) further comprises a fixing rod (542), the middle portion of the sleeve (541) is connected to the fixing rod (542) via a nut, and the fixing rod (542) passes through a circular hole in the middle portion of the spiral plate (543) located inside the sleeve (541).

5. The denitrification and denitration tower for secondary zinc oxide processing according to claim 2, characterized in that: The treatment mechanism (5) further comprises a catalytic plate (55), a heater 1 (56) and a heater 2 (57); the right side of the top wall of the treatment tower (2) is fixedly connected to the uniformly distributed heater 2 (57); the inside of the right side of the treatment tower (2) is fixedly connected to the uniformly distributed catalytic plate (55); the catalytic plate (55) is a titanium dioxide catalytic plate; the inner wall of the right side of the treatment tower (2) is fixedly connected to the uniformly distributed heater 1 (56); the heater 1 (56) is respectively located between two adjacent catalytic plates (55); the input ends of the heater 1 (56) and the heater 2 (57) are both electrically connected to the output end of the controller (7).

6. The denitrification and denitration tower for secondary zinc oxide processing according to claim 2, characterized in that: The invention also includes a base (3), the base (3) being located on the left side of the preheating tower (1), a hot air heater (4) being placed on the upper surface of the base (3), an air outlet of the hot air heater (4) being connected to the lower end of the left side of the preheating tower (1), and an input end of the hot air heater (4) being electrically connected to an output end of a controller (7).

7. The denitrification and denitration tower for zinc oxide processing according to claim 1, characterized in that: The inner upper end of the left side of the treatment tower (2) is fixedly connected with evenly distributed guide plates (6).

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