Titanium dioxide calcination tail gas treatment device
By adopting a staggered baffle and spray layer design in the titanium dioxide calcination tail gas treatment device, the tail gas retention time is extended, solving the problem of high equipment cost in the existing technology and achieving a highly efficient desulfurization effect.
Patent Information
- Application Number
- CN202423276708.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2034-12-27
AI Technical Summary
The existing scrubbing towers and desulfurization towers are structurally identical, which means that improving the desulfurization effect can only be achieved by increasing the height of the tower and adding a spray layer, resulting in high equipment costs.
By using staggered first and second baffles to form an S-shaped path, the residence time of exhaust gas in the tower is extended. Combined with the spray layer and demister layer, the contact rate between exhaust gas and spray liquid is increased, thereby enhancing the desulfurization effect.
It can improve desulfurization effect, reduce equipment cost, and extend the residence time of exhaust gas in the tower without increasing the tower height or adding spray layers, thereby enhancing desulfurization efficiency.
Smart Images
Figure CN223668971U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to waste gas treatment technical field especially relates to a titanium dioxide calcination tail gas treatment device. BACKGROUND
[0002] In the production process of titanium dioxide, metatitanic acid filter cake is calcined at high temperature in a rotary kiln to carry out dehydration, desulfurization, crystal type conversion and ion growth, and the generated titanium dioxide dust, sulfur dioxide and sulfur trioxide are first removed by electric precipitation to remove most of the titanium dioxide dust, then sprayed with production water through a venturi tube for cooling and dust removal, and then sprayed with calcium carbide slag emulsion in a desulfurization tower for desulfurization, the desulfurized gas is further sprayed with sodium hydroxide lye in a washing tower for desulfurization to further remove sulfur dioxide and sulfur trioxide, and the treated gas enters an electrostatic mist eliminator and is discharged into the atmosphere by a chimney under the driving of a tail gas fan negative pressure.
[0003] The existing washing tower and desulfurization tower have no difference in structure, both of which are provided with multiple spray layers in the tower body, the tail gas passes through the tower body from bottom to top, and the spray liquid drips from top to bottom to contact the tail gas, and in order to improve the desulfurization effect of the tower body, the tower body must be increased in height and the spray layers must be increased, resulting in high equipment cost. UTILITY MODEL CONTENT
[0004] In order to solve the problems mentioned in the background art, the purpose of the utility model is to provide a titanium dioxide calcination tail gas treatment device.
[0005] In order to achieve the above-mentioned target, the technical scheme of the utility model is as follows:
[0006] A titanium dioxide calcination tail gas treatment device, comprising a tower body and a suction fan, a tail gas inlet is arranged on the side of the tower body, a tail gas outlet is arranged on the top of the tower body, the tail gas outlet is connected with the suction fan through a pipeline, a plurality of first baffles and second baffles are arranged in the tower body in a longitudinal staggered manner, the edge of the first baffle is connected with the inner wall of the tower body, a ventilation opening is arranged in the center of the first baffle, the edge of the second baffle is arranged in a spaced manner with the inner wall of the tower body, a plurality of connecting blocks are fixedly connected between the edge of the second baffle and the inner wall of the tower body, and a spray layer is arranged above each first baffle and second baffle in the tower body.
[0007] Further, the distance between the first baffle and the second baffle and the bottom plate of the tower body gradually decreases from the edge to the center, a liquid leakage opening is arranged in the center of the second baffle, and the size of the liquid leakage opening is smaller than that of the ventilation opening.
[0008] Further, a mist removal layer is arranged in the tower body, and the mist removal layer is arranged between the tail gas outlet and the topmost spray layer.
[0009] Further, the tower body is provided with a spray cleaning piece above the demisting layer, and the spray cleaning piece is used for spraying the demisting layer.
[0010] Further, the tower body is provided with a spray cleaning piece above the demisting layer, and the spray cleaning piece is used for spraying the demisting layer.
[0011] The beneficial effects of the present application are that the first baffle and the second baffle can guide the tail gas, so that the tail gas can only move upward along the S-shaped path, prolong the residence time of the tail gas in the tower body, thereby increasing the contact rate of the tail gas and the spraying liquid, without the need of increasing the height of the tower body and adding the spraying layer, and the desulfurization effect of the tower body can be improved. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 The present application is a structural schematic diagram.
[0013] The drawing number is explained as follows: 1, tower body, 11, tail gas inlet, 12, tail gas outlet, 13, first baffle, 131, air vent, 14, second baffle, 141, connecting block, 142, liquid leakage port, 2, air suction fan, 21, smoke exhaust pipe, 3, spraying layer, 4, circulating pump, 41, liquid suction pipe, 42, liquid discharge pipe, 5, demisting layer, 6, spray cleaning piece. DETAILED DESCRIPTION
[0014] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art belong to the protection scope of the present application.
[0015] As Figure 1As shown, a titanium dioxide calcination tail gas treatment device includes a tower body 1 and a suction fan 2, the lower end of the side of the tower body 1 is provided with a tail gas inlet 11, the top of the tower body 1 is provided with a tail gas outlet 12, the tail gas outlet 12 is connected with the suction fan 2 through a pipeline, the discharge end of the suction fan 2 is connected with a smoke exhaust pipe 21, two first baffles 13 are arranged in the tower body 1 in a longitudinal direction, the edges of the first baffles 13 are connected with the inner wall of the tower body 1, air vents 131 are arranged in the centers of the first baffles 13, a second baffle 14 is arranged in the tower body 1 between the two first baffles 13, the edges of the second baffle 14 are arranged in a spaced manner with the inner wall of the tower body 1, a plurality of connecting blocks 141 are fixedly connected between the edges of the second baffle 14 and the inner wall of the tower body 1, a spraying layer 3 is arranged above each of the first baffles 13 and the second baffle 14 in the tower body 1, a circulating pump 4 is arranged outside the tower body 1, a liquid suction pipe 41 is connected with the suction end of the circulating pump 4, the liquid suction pipe 41 is communicated with the bottom of the tower body 1, a liquid discharge pipe 42 is connected with the discharge end of the circulating pump 4, and the liquid discharge pipe 42 is connected with the spraying layers 3.
[0016] When the tail gas is treated, the suction fan 2 is opened to form a negative pressure in the tower body 1, and the circulating pump 4 is also opened, the tail gas enters the tower body 1 through the tail gas inlet 11, the two first baffles 13 and the second baffle 14 can guide the tail gas to move upwards along an S-shaped path, thereby prolonging the residence time of the tail gas in the tower body 1 and increasing the contact rate of the tail gas and the spraying liquid, without the need to increase the height of the tower body 1 and the spraying layers 3, the desulfurization effect of the tower body 1 can be improved.
[0017] In the embodiment, the distance between the first baffle 13 and the second baffle 14 and the bottom plate of the tower body 1 gradually decreases from the edge to the center, the center of the second baffle 14 is provided with a liquid leakage hole 142, the size of the liquid leakage hole 142 is smaller than that of the air vent 131, the first baffle 13 is arranged in a conical shell shape with the edge being high and the center being low, and the spraying liquid can flow downwards.
[0018] In the embodiment, a demisting layer 5 is arranged in the tower body 1, the demisting layer 5 is arranged between the tail gas outlet 12 and the topmost spraying layer 3, and the demisting layer 5 adopts a baffle demister to demist the tail gas.
[0019] In the embodiment, a spray cleaning piece 6 is arranged above the demisting layer 5 in the tower body 1, and the spray cleaning piece 6 is used to spray and clean the demisting layer 5.
[0020] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A titanium dioxide calcination tail gas treatment device, comprising a tower body (1) and a suction fan (2), a tail gas inlet (11) is arranged on the side of the tower body (1), a tail gas outlet (12) is arranged on the top of the tower body (1), and the tail gas outlet (12) is connected with the suction fan (2) through a pipeline, characterized in that, The tower body (1) is longitudinally staggered with a plurality of first baffles (13) and second baffles (14), the edge of the first baffle (13) is connected with the inner wall of the tower body (1), the center of the first baffle (13) is provided with a vent (131), the edge of the second baffle (14) is arranged in a spaced manner with the inner wall of the tower body (1), a plurality of connecting blocks (141) are fixedly connected between the edge of the second baffle (14) and the inner wall of the tower body (1), and a spray layer (3) is arranged above each first baffle (13) and second baffle (14) in the tower body (1).
2. The titanium dioxide calcination tail gas treatment device according to claim 1, characterized in that, The distance between the first baffle (13) and the second baffle (14) and the bottom plate of the tower body (1) gradually decreases from the edge to the center, the center of the second baffle (14) is provided with a liquid leakage hole (142), and the size of the liquid leakage hole (142) is smaller than that of the vent (131).
3. The titanium dioxide calcination off-gas treatment device according to claim 1, characterized in that, The tower body (1) is provided with a demisting layer (5), and the demisting layer (5) is arranged between the tail gas outlet (12) and the topmost spray layer (3).
4. The titanium dioxide calcination off-gas treatment device according to claim 3, characterized in that, A spray washing piece (6) is arranged above the demisting layer (5) in the tower body (1), and the spray washing piece (6) is used for spraying and washing the demisting layer (5).
5. The titanium dioxide calcination off-gas treatment device according to claim 1, characterized in that, A circulating pump (4) is arranged outside the tower body (1), a liquid suction pipe (41) is connected to the suction end of the circulating pump (4), the liquid suction pipe (41) is communicated with the bottom of the tower body (1), a liquid discharge pipe (42) is connected to the discharge end of the circulating pump (4), and the liquid discharge pipe (42) is connected with a plurality of spray layers (3).