Zinc oxide powder production waste gas desulfurization tower

Abstract

The utility model provides a waste gas desulfurization tower for zinc oxide powder production, which relates to the technical field of zinc oxide production devices, and comprises a tower body, a shunting tower tray, a confluence tower tray, a slurry tank, a circulating pipe and a pump machine, the top of the tower body is provided with an exhaust port, the side wall of the lower part of the tower body is connected with a gas inlet pipe, and the shunting tower tray and the confluence tower tray are arranged in the tower body at an interval; the bottom of the tower body is connected with the slurry tank through a pipeline, the liquid inlet end of the circulating pipe is connected with the slurry tank, the liquid outlet end of the circulating pipe is connected with the tower body and extends into the tower body to discharge liquid downwards, and the pump machine is installed at the liquid inlet end of the circulating pipe to pump slurry to the liquid outlet end. And the water is easy to deposit in circulating equipment, so that the cleaning and the maintenance are difficult.

Description

Technical Field

[0001] This utility model relates to the technical field of zinc oxide production equipment, specifically to a desulfurization tower for waste gas from zinc oxide powder production. Background Technology

[0002] Zinc oxide powder is a commonly used chemical additive, widely used in the production of plastics, silicate products, synthetic rubber, lubricating oil, paints, coatings, ointments, adhesives, food, batteries, flame retardants and other products. Zinc oxide has a desulfurization effect. The waste gas generated during the production of zinc oxide powder contains sulfur dioxide. Using zinc oxide to remove the sulfur dioxide generated in the system can greatly reduce the desulfurization cost.

[0003] Zinc oxide used for desulfurization requires the preparation of an absorbent slurry that comes into contact with sulfur dioxide flue gas. The zinc oxide reacts with the sulfur dioxide to form zinc sulfite or its crystals. Traditional desulfurization towers use circulating pipes to spray zinc oxide slurry into the sulfur dioxide flue gas to generate zinc sulfite for desulfurization. However, zinc sulfite easily crystallizes, causing blockages in the pipes and depositing within the circulating equipment, making cleaning and maintenance difficult. Therefore, this application proposes a desulfurization tower for waste gas from zinc oxide powder production. Utility Model Content

[0004] In order to overcome the problems in the background technology, this utility model provides a desulfurization tower for zinc oxide powder production waste gas, which solves the problems that when traditional desulfurization towers are used for desulfurization of zinc oxide powder production waste gas, zinc sulfite is prone to crystallization, causing blockage of pipelines, and is easy to deposit in the circulation equipment, making cleaning and maintenance difficult.

[0005] A desulfurization tower for waste gas from zinc oxide powder production includes a tower body, a distribution tray, a confluence tray, a slurry tank, a circulation pipe, and a pump. The top of the tower body is an exhaust port, and an inlet pipe is connected to the side wall of the lower part of the tower body. The distribution tray and the confluence tray are installed alternately in the tower body. The bottom of the tower body is connected to the slurry tank through a pipe. The inlet end of the circulation pipe is connected to the slurry tank, and the outlet end is connected to the tower body, extending into the tower body and discharging downwards. The pump is installed at the inlet end of the circulation pipe and pumps the slurry to the outlet end.

[0006] Furthermore, the diversion tray and the confluence tray are conical in shape, with diversion grooves evenly distributed along the edge of the diversion tray and a confluence hole at the center of the confluence tray. The confluence tray is installed upside down on the tower body.

[0007] Furthermore, the diversion tray and the convergence tray are staggered and installed on the side wall of the tower body, and the top tray and the bottom tray inside the tower body are both diversion trays.

[0008] Furthermore, the slurry tank is provided with a material inlet, and a filter plate is provided inside the slurry tank. An aeration pipe is installed above the filter plate and connected to an aeration blower outside the tank. The slurry tank below the filter plate is connected to a circulation pipe.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] This application includes a diversion tray, a manifold tray, a slurry tank, a circulation pipe, and a pump. The diversion tray and manifold tray replace the traditional spray pipes, solving the problem of easy clogging and difficult maintenance of the pipes due to zinc sulfite crystallization. The slurry tank is equipped with a filter plate and an aeration pipe, which can not only prevent zinc sulfite from easily depositing, but also, after aeration, zinc sulfite reacts with oxygen to form zinc sulfate with higher solubility, which is not easy to crystallize and deposit, thus reducing the maintenance frequency. Attached Figure Description

[0011] To clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments are explained.

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0014] Figure 3 This is a schematic diagram of the cross-sectional structure of the present invention;

[0015] Figure 4 This is a schematic diagram of the tower tray structure of this utility model.

[0016] 1-Tower body, 11-Exhaust port, 12-Inlet pipe, 2-Diverter tray, 21-Diverter trough, 3-Merging tray, 31-Merging hole, 4-Slurry tank, 41-Material inlet, 42-Filter plate, 5-Circulation pipe, 6-Pump, 7-Aeration pipe, 8-Aeration blower. Detailed Implementation

[0017] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, so as to facilitate the understanding of those skilled in the art.

[0018] This utility model discloses a desulfurization tower for waste gas from zinc oxide powder production. (See reference...) Figure 1-4 A desulfurization tower for waste gas from zinc oxide powder production includes a tower body 1, a distribution tray 2, a confluence tray 3, a slurry tank 4, a circulation pipe 5, and a pump 6. The top of the tower body 1 is an exhaust port 11, and an air inlet pipe 12 is connected to the side wall of the lower part of the tower body 1. The distribution tray 2 and the confluence tray 3 are installed alternately inside the tower body 1. The bottom of the tower body is connected to the slurry tank 4 through a pipe. The inlet end of the circulation pipe 5 is connected to the slurry tank 4, and the outlet end is connected to the tower body 1, extending into the tower body 1 and discharging downwards. The pump 6 is installed at the inlet end of the circulation pipe 5 and pumps the slurry to the outlet end.

[0019] The tower body 1 can desulfurize the waste gas from zinc oxide powder production. The waste gas can enter the bottom of the tower body 1 through the inlet pipe 12. A booster fan is installed on the inlet pipe 12. The zinc oxide slurry can be prepared in the slurry tank 4. The prepared zinc oxide slurry is pumped to the top of the tower body 1 through the pump 6 and the circulation pipe 5. The zinc oxide slurry flows down from the top of the tower body through the distribution tray 2 and the confluence tray 3 in sequence. The waste gas flows down from the bottom of the tower through the distribution tray 2 and the confluence tray 3 in sequence. During this process, zinc oxide reacts with sulfur dioxide to form zinc sulfite, which is removed and flows down into the slurry tank 4.

[0020] See Figure 1-4 The diversion tray 2 and the confluence tray 3 are conical in shape. The diversion tray 2 is evenly provided with diversion grooves 21 on its edge. The slurry flowing out of the circulation pipe 5 falls into the diversion tray 2 and then disperses and flows in all directions to improve the contact efficiency with the waste gas. The confluence tray 3 is provided with a confluence hole 31 in the center. The confluence tray 3 is installed upside down on the tower body 1. The slurry after being diverted by the diversion tray 2 is gathered in the confluence tray 3 and then diverted again.

[0021] See Figure 1-4 The diversion tray 2 and the confluence tray 3 are staggered and installed on the side wall of the tower body 1, and the top tray and bottom tray of the tower body 1 are both diversion trays 2, so that the tail gas and slurry repeatedly come into contact for desulfurization.

[0022] See Figure 1-4 The slurry tank 4 is equipped with a feed inlet 41 and a filter plate 42 inside the slurry tank 4. An aeration pipe 7 is installed above the filter plate 42 and connected to an aeration blower 8 outside the tank. The slurry tank 4 below the filter plate 42 is connected to a circulation pipe 5. Aeration above the filter plate 42 can prevent sedimentation and at the same time allow zinc sulfite to react with oxygen to generate zinc sulfate with high solubility. The filtered slurry can be pumped below the filter plate 42 to prevent pipe blockage.

[0023] Work process:

[0024] Zinc oxide slurry is prepared in slurry tank 4. Pump 6 is started to pump the slurry to the top of tower 1 through circulation pipe 5. Exhaust gas enters the bottom of tower 1 through inlet pipe 12. Zinc oxide slurry flows down from the top of tower through distribution tray 2 and confluence tray 3. Exhaust gas flows down from the bottom of tower through distribution tray 2 and confluence tray 3. Zinc oxide reacts with sulfur dioxide to form zinc sulfite, which is removed and flows down to slurry tank 4. After aeration through aeration pipe 7, zinc sulfate slurry with high solubility is generated.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A zinc oxide powder production off-gas desulfurization tower characterized by: The tower includes a tower body (1), a distribution tray (2), a confluence tray (3), a slurry tank (4), a circulation pipe (5), and a pump (6). The top of the tower body (1) is an exhaust port (11), and an air inlet pipe (12) is connected to the side wall of the lower part of the tower body (1). The distribution tray (2) and the confluence tray (3) are installed alternately inside the tower body (1). The bottom of the tower body is connected to the slurry tank (4) through a pipe. The inlet end of the circulation pipe (5) is connected to the slurry tank (4), and the outlet end is connected to the tower body (1), extending into the tower body (1) and discharging downwards. The pump (6) is installed at the inlet end of the circulation pipe (5) and pumps the slurry to the outlet end.

2. The zinc oxide powder production waste gas desulfurization tower according to claim 1, characterized in that: The diversion tray (2) and the confluence tray (3) are conical in shape. The diversion tray (2) has diversion grooves (21) evenly arranged on its edge, and the confluence tray (3) has a confluence hole (31) in its center. The confluence tray (3) is installed upside down on the tower body (1).

3. The waste gas desulfurization tower for producing zinc oxide powder according to claim 1, characterized in that: The diversion tray (2) and the confluence tray (3) are staggered and installed on the side wall of the tower body (1) inside the tower body (1), and the top tray and the bottom tray inside the tower body (1) are both diversion trays (2).

4. The waste gas desulfurization tower for producing zinc oxide powder according to claim 1, wherein: The slurry tank (4) is provided with a feed inlet (41), and a filter plate (42) is provided inside the slurry tank (4). An aeration pipe (7) is installed above the filter plate (42) and connected to an aeration blower (8) outside the tank. The slurry tank (4) below the filter plate (42) is connected to a circulation pipe (5).

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