Wet flue gas desulfurization tower

Abstract

The utility model provides a wet flue gas desulfurization tower which comprises a tower body provided with a gas flow channel; the synergistic partition plate is fixedly connected into the airflow channel and is used for reducing the flow velocity of the flue gas in the airflow channel; the first spraying mechanism is installed in the airflow channel, a plurality of first atomizing nozzles are installed on the first spraying mechanism at intervals, and the first atomizing nozzles are all arranged in the flowing direction of the target flue gas; the second spraying mechanism is installed in the airflow channel, a plurality of second atomizing nozzles are installed on the second spraying mechanism, and the second atomizing nozzles are arranged in the circumferential direction of the inner wall of the tower body and used for spraying the target flue gas from the side face; and the liquid collecting tank is connected to the bottom of the tower body. The utility model relates to a spray-type desulfurizing tower, in particular to a spray-type desulfurizing tower, and aims to solve the problems that in the prior art, most spray devices of most spray-type desulfurizing towers directly spray absorption liquid down, gaps exist between water curtains, and high-efficiency reaction is difficult.

Description

Technical Field

[0001] The present application belongs to the technical field of desulfurization equipment, and more specifically, relates to a wet flue gas desulfurization tower. Background Art

[0002] Flue gas desulfurization refers to the removal of sulfur oxides (SO2 and SO3) from flue gas or other industrial waste gas. SO2 in flue gas is acidic in nature and can be removed from flue gas by reacting with appropriate alkaline substances. The most commonly used alkaline substances for flue gas desulfurization are limestone (calcium carbonate, CaCO3), quicklime (calcium oxide, CaO) and slaked lime (calcium hydroxide, Ca(OH)2).

[0003] The Chinese patent publication number is: CN201711084U. A wet flue gas desulfurization tower is provided. The desulfurization tower includes a desulfurization tower body, a flue gas desulfurization device and a flue gas demister. A flue gas pre-spray cooling device is provided on the outer wall of the desulfurization tower body. The flue gas pre-spray cooling device is inclined upward and forms an angle of 60° with the outer wall of the desulfurization tower body. A spray pipe is provided in the flue gas pre-spray cooling device; the flue gas desulfurization device and the flue gas demister are arranged in the desulfurization tower in sequence, above the flue gas pre-spray cooling device, and a demister backwashing device is provided between the flue gas desulfurization device and the flue gas demister, which has a good desulfurization effect.

[0004] However, the absorption liquid of this patent is sprayed down directly, and there are gaps between the water curtains, which makes it difficult to react efficiently. In order to achieve more efficient desulfurization, it is necessary to design a desulfurization tower to make the desulfurization effect more efficient. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a wet flue gas desulfurization tower to solve the problem in the prior art that most of the spray equipment of the spray type desulfurization towers directly sprays the absorption liquid, and there are gaps between the water curtains, making it difficult to react efficiently.

[0006] To achieve the above purpose, the technical solution adopted in this application is: to provide a wet flue gas desulfurization tower, comprising:

[0007] The tower body is formed with an air flow channel;

[0008] an enhancement baffle fixedly connected to the air flow channel, the enhancement baffle being used to reduce the flow velocity of the flue gas in the air flow channel, thereby increasing the contact time and contact area between the flue gas and the desulfurizer;

[0009] A first spray mechanism is installed in the air flow channel, and a plurality of first atomizing nozzles are installed on the first spray mechanism at intervals, and the plurality of first atomizing nozzles are all arranged toward the flow direction of the target flue gas;

[0010] A second spray mechanism is installed in the air flow channel, and a plurality of second atomizing nozzles are installed on the second spray mechanism. The plurality of second atomizing nozzles are arranged circumferentially along the inner wall of the tower body. The plurality of second atomizing nozzles are used to spray the target flue gas from the side, and also have a turbulent effect on the target flue gas, thereby increasing the reaction time between the spray liquid and the target flue gas;

[0011] The liquid collecting tank is connected to the bottom of the tower body and is used to receive the desulfurizing agent after reacting with the target flue gas.

[0012] Preferably, the first spray mechanism comprises:

[0013] A water supply pipe, connected to the tower body and communicated with the first water inlet;

[0014] A first connecting pipe is connected to the water supply pipe and is symmetrically arranged with respect to the water supply pipe, and first atomizing nozzles are arranged at intervals on both sides of the first connecting pipe;

[0015] A second connecting pipe is connected to the water supply pipe and is symmetrically arranged with respect to the water supply pipe, and first atomizing nozzles are arranged at intervals on both sides of the second connecting pipe;

[0016] A plurality of the second connecting pipes are provided, and the plurality of the second connecting pipes are symmetrically arranged with respect to the first connecting pipe.

[0017] Preferably, the first atomizing nozzle on the first connecting pipe and the first atomizing nozzle on the second connecting pipe are arranged alternately.

[0018] Preferably, the diameter of the water supply pipe is set to decrease gradually to improve water supply efficiency and reduce energy loss;

[0019] The diameters of the first connecting pipe and the second connecting pipe are gradually reduced and extended outward from both sides of the water supply pipe.

[0020] Preferably, the plurality of the second atomizing nozzles are arranged in multiple layers in a staggered manner, so that the spray liquid is injected in a spiral shape.

[0021] Preferably, at least one vent hole is provided on the efficiency-enhancing baffle.

[0022] Preferably, a first inclined plate and a second inclined plate are arranged in a staggered manner in the vent hole, and an S-shaped channel is formed between the first inclined plate and the second inclined plate.

[0023] Preferably, the first inclined plate and the second inclined plate are both provided with leakage holes for allowing the desulfurizer to pass through and be evenly distributed into the flue gas.

[0024] The beneficial effect of a wet flue gas desulfurization tower provided in the present application is that after the flue gas enters the air flow channel from the air inlet, it passes through the air holes in the synergistic baffle through the first inclined plate and the second inclined plate arranged alternately in the air holes, and an S-shaped channel is formed between the first inclined plate and the second inclined plate to slow down the flue gas before entering the spray area. In this process, the flue gas contacts and reacts with the desulfurizer dripping from the leakage hole for the first time to complete the first desulfurization; the flue gas after passing through the S-shaped channel enters the spray area, and the multiple second atomizing nozzles in the second spray mechanism are arranged in a multi-layer staggered manner, so that the sprayed spray liquid is spirally sprayed on the flue gas from the side, and the second spray mechanism also turbulently slows down the flue gas. At the same time, the first spray mechanism in the spray area sprays the oncoming flue gas, so that the flue gas is more fully desulfurized. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a wet flue gas desulfurization tower provided in an embodiment of the present application;

[0027] Figure 2 A schematic diagram of the three-dimensional structure of a desulfurization tower spray device provided in an embodiment of the present application;

[0028] Figure 3 Provided in the embodiments of this application Figure 1 Schematic diagram of the top view structure in ;

[0029] Figure 4 A schematic diagram of a top view of the first spray mechanism provided in an embodiment of the present application;

[0030] Figure 5 A schematic diagram of a top view of the second spray mechanism provided in an embodiment of the present application;

[0031] Figure 6 A schematic diagram of a structure in which the second atomizing nozzle group provided in an embodiment of the present application is arranged on the inner wall of the annular connecting pipe in four layers distributed along the axial direction of the annular connecting pipe from top to bottom;

[0032] Figure 7 A schematic diagram of the structure of the efficiency enhancement baffle provided in the embodiment of the present application;

[0033] Figure 8 A schematic diagram of the cross-sectional structure of a through hole provided in an embodiment of the present application.

[0034] Among them, the reference numerals in the figure are:

[0035] 1. Tower body; 2. First water inlet; 3. Second water inlet; 4. First spray mechanism; 41. Water supply pipe; 42. First connecting pipe; 43. Second connecting pipe; 44. First atomizing nozzle 5. Second spray mechanism; 51. Annular connecting pipe; 52. Second atomizing nozzle; 53. Solenoid valve; 54. Second atomizing nozzle group on the first layer; 55. Second atomizing nozzle group on the second layer; 56. Second atomizing nozzle group on the third layer; 57. Second atomizing nozzle group on the fourth layer; 6. Efficiency enhancement baffle; 61. Air vent; 62. First inclined plate; 63. Second inclined plate; 64. Liquid leakage hole; 7. Air inlet; 8. Liquid collecting tank; 9. Direct exhaust chimney. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0038] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] Please also read Figures 1 to 5 , a wet flue gas desulfurization tower provided in an embodiment of the present application is now described.

[0041] A wet flue gas desulfurization tower comprises: a tower body 1, which is formed with an air flow channel, and an air inlet 7 is arranged on the tower body 1, the air inlet 7 is connected to the air flow channel, and a straight-discharge chimney 9 is fixedly connected to the top of the tower body 1. An enhancement baffle 6 is fixedly connected in the air flow channel, and a plurality of vents 61 are evenly arranged on the enhancement baffle 6, and the plurality of vents 61 are evenly arranged to evenly distribute the flue gas, and the enhancement baffle 6 is used to reduce the flow rate of the flue gas in the air flow channel, thereby increasing the contact time and contact area between the flue gas and the desulfurizer (the desulfurizer in this article is an alkaline slurry such as lime water). A first spray mechanism 4 is installed in the air flow channel, and a plurality of first atomizing nozzles 44 are installed at intervals on the first spray mechanism 4, and the plurality of first atomizing nozzles 44 are all arranged toward the flow direction of the target flue gas. The second spray mechanism 5 is installed in the air flow channel. A plurality of second atomizing nozzles 52 are installed on the second spray mechanism 5. The plurality of second atomizing nozzles 52 are arranged along the inner wall circumference of the tower body 1. The plurality of second atomizing nozzles 52 are used to spray the target flue gas from the side, and also have a turbulent effect on the target flue gas, thereby increasing the reaction time between the spray liquid and the target flue gas. The liquid collecting tank 8 is connected to the bottom of the tower body 1, and is used to receive the desulfurizer after reacting with the target flue gas. Along the forward direction of the flue gas in the air flow channel, the synergistic baffle 6, the second spray mechanism 5, the first spray mechanism 4, and the direct discharge chimney 9 are arranged in sequence. After the flue gas enters the air flow channel from the air inlet 7, it enters the spray area after being decelerated by the synergistic baffle 6. The flue gas after the reaction with the desulfurizer in the spray area is discharged from the direct discharge chimney 9.

[0042] Specifically, the first spray mechanism 4 includes: a water supply pipe 41 connected to the tower body 1 and connected to the first water inlet 2, and the diameter of the water supply pipe 41 is set to decrease from the first water inlet 2 to the end to improve the water supply efficiency and reduce energy loss. A first connecting pipe 42 is connected to the water supply pipe 41 and is symmetrically arranged with respect to the water supply pipe 41, and first atomizing nozzles 44 are arranged at intervals on both sides of the first connecting pipe 42; a second connecting pipe 43 is connected to the water supply pipe 41 and is symmetrically arranged with respect to the water supply pipe 41, and first atomizing nozzles 44 are arranged at intervals on both sides of the second connecting pipe 43.

[0043] As a preferred embodiment, a plurality of second connecting pipes 43 are provided, and the plurality of second connecting pipes 43 are symmetrically arranged about the first connecting pipe 42. In order to make the first spraying mechanism 4 spray the target flue gas more uniform, the first atomizing nozzle 44 on the first connecting pipe 42 and the first atomizing nozzle 44 on the second connecting pipe 43 are arranged alternately.

[0044] In order to improve water supply efficiency and reduce energy loss, the diameter of the water supply pipe 41 is gradually extended from the first water inlet 2 into the tower. The diameters of the first connecting pipe 42 and the second connecting pipe 43 are gradually extended from both sides of the water supply pipe 41 outward.

[0045] As a preferred embodiment, a plurality of the second atomizing nozzles 52 are arranged in multiple layers in a staggered manner, so that the spray liquid injected is in a spiral shape.

[0046] Specifically, the second spray mechanism 5 on the inner wall of the tower body 1 includes an annular connecting pipe 51, which is installed in the installation groove on the inner wall of the tower body 1. A plurality of branch pipes are arranged on the inner wall of the annular connecting pipe 51, and each branch pipe is connected to a second atomizing nozzle 52. The plurality of the second atomizing nozzles 52 are arranged in multiple layers in a staggered manner on the inner wall of the annular connecting pipe 51. Specifically, there are 16 second atomizing nozzles 52, and four second atomizing nozzles 52 form a group in each layer and are arranged opposite to each other. Four layers are arranged on the inner wall of the tower body 1 along the axial direction of the tower body 11 from top to bottom, wherein the second atomizing nozzle group 54 of the first layer is a, e, i, m; the second atomizing nozzle group 55 of the second layer is b, f, j, n; the second atomizing nozzle group 56 of the third layer is c, g, k, o; the second atomizing nozzle group 57 of the fourth layer is d, h, l, p. On the inner wall of the tower body 11, four layers of second atomizing nozzles a, b, c, d, second atomizing nozzles e, f, g, h, second atomizing nozzles i, j, k, l, second atomizing nozzles m, n, o, p are distributed from top to bottom along the axial direction of the tower body 11, all of which are arranged in spiral steps. When in use, the second atomizing nozzles 52 spray toward the target flue gas at the same time.

[0047] In another embodiment, the second spray mechanism 5 on the inner wall of the tower body 1 includes an annular connecting pipe 51, which is installed in a mounting groove on the inner wall of the tower body 1 and is connected to the second water inlet 3. A plurality of branch pipes are arranged on the inner wall of the annular connecting pipe 51, and each branch pipe is connected to a second atomizing nozzle 52. The plurality of second atomizing nozzles 52 are arranged in multiple layers on the inner wall of the annular connecting pipe 51, and the plurality of second atomizing nozzles 52 are each connected to an electromagnetic valve 53. Specifically, there are 16 second atomizing nozzles 52, and four second atomizing nozzles 52 in each layer form a group and are arranged opposite to each other in pairs. Four layers are arranged on the inner wall of the tower body 1 along the axial direction of the tower body 11 from top to bottom. The second atomizing nozzle group 54 in the first layer is a, e, i, and m, and the solenoid valves 53 connected to a, e, i, and m respectively constitute a first solenoid valve 53 group; the second atomizing nozzle group 55 in the second layer is b, f, j, and n, and the solenoid valves 53 connected to b, f, j, and n respectively constitute a second solenoid valve 53 group; the second atomizing nozzle group 56 in the third layer is c, g, k, and o, and the solenoid valves 53 connected to b, f, j, and n respectively constitute a second solenoid valve 53 group. The electromagnetic valves 53 connected to c, g, k, and o together form the third electromagnetic valve group 53; the second atomizing nozzle group 57 of the fourth layer is d, h, l, and p, and the electromagnetic valves 53 connected to d, h, l, and p respectively form the fourth electromagnetic valve group 53; and the first electromagnetic valve group 53, the second electromagnetic valve group 53, the third electromagnetic valve group 53, and the fourth electromagnetic valve group 53 are all connected to the controller (not shown in the figure) by signal, and the controller sends an opening or closing command to the first electromagnetic valve group 53, the second electromagnetic valve group 53, the third electromagnetic valve group 53, and the fourth electromagnetic valve group 53 according to the pre-set control time. In this embodiment, the interval time of each electromagnetic valve group 53 is 3 seconds. After the second atomizing nozzle group 54 of the first layer is finished working, the controller sends a closing command to the first solenoid valve 53 group and sends an opening command to the second solenoid valve 53 group, and the second atomizing nozzle group 55 of the second layer is working. After the second atomizing nozzle group 55 of the second layer is finished, the controller sends a closing command to the second solenoid valve 53 group and sends an opening command to the third solenoid valve 53 group, and the second atomizing nozzle group 56 of the third layer is working. After the second atomizing nozzle group 56 of the third layer is finished, the controller sends a closing command to the third solenoid valve 53 group and sends an opening command to the fourth solenoid valve 53 group, and the second atomizing nozzle group 57 of the fourth layer is working. This is repeated so that the injected compressed air is spiral. The start and stop time of each layer is 3 seconds as an example.

[0048] In order to further increase the contact time and contact area between the flue gas and the desulfurizer, the vent hole 61 is provided with a staggered first inclined plate 62 and a second inclined plate 63, and an S-shaped channel is formed between the first inclined plate 62 and the second inclined plate 63. The first inclined plate 62 and the second inclined plate 63 are both provided with leakage holes 64 for allowing the desulfurizer to pass through and be evenly distributed in the flue gas.

[0049] In summary, the working principle of the present scheme is as follows: after the flue gas enters the air flow channel from the air inlet 7, it passes through the air hole 61 in the enhancement baffle 6 through the first inclined plate 62 and the second inclined plate 63 arranged alternately in the air hole 61, and an S-shaped channel is formed between the first inclined plate 62 and the second inclined plate 63 to slow down the flue gas before entering the spray area. In this process, the flue gas contacts and reacts with the desulfurizer dripping from the leakage hole 64 for the first time to complete the first desulfurization; the flue gas after passing through the S-shaped channel enters the spray area, and the multiple second atomizing nozzles 52 in the second spray mechanism 5 are arranged in a multi-layer staggered manner, so that the spray liquid is spirally sprayed to spray the flue gas from the side, and the second spray mechanism 5 also turbulently slows down the flue gas. At the same time, the first spray mechanism 4 in the spray area sprays the oncoming flue gas, so that the flue gas is more fully desulfurized.

[0050] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A wet flue gas desulfurization tower, characterized in that: include: The tower body is formed with an air flow channel; An efficiency enhancement baffle, fixedly connected to the air flow channel, the efficiency enhancement baffle is used to reduce the flow rate of smoke in the air flow channel; A first spray mechanism is installed in the air flow channel, and a plurality of first atomizing nozzles are installed on the first spray mechanism at intervals, and the plurality of first atomizing nozzles are all arranged toward the flow direction of the target flue gas; A second spray mechanism is installed in the air flow channel, and a plurality of second atomizing nozzles are installed on the second spray mechanism. The plurality of second atomizing nozzles are arranged circumferentially along the inner wall of the tower body. The plurality of second atomizing nozzles are used to spray the target flue gas from the side, and also have a turbulent effect on the target flue gas, thereby increasing the reaction time between the spray liquid and the target flue gas; The liquid collecting tank is connected to the bottom of the tower body and is used to receive the desulfurizing agent after reacting with the target flue gas.

2. A wet flue gas desulfurization tower according to claim 1, characterized in that: The first spray mechanism comprises: A water supply pipe, connected to the tower body and communicated with the first water inlet; A first connecting pipe is connected to the water supply pipe and is symmetrically arranged with respect to the water supply pipe, and first atomizing nozzles are arranged at intervals on both sides of the first connecting pipe; A second connecting pipe is connected to the water supply pipe and is symmetrically arranged with respect to the water supply pipe, and first atomizing nozzles are arranged at intervals on both sides of the second connecting pipe; A plurality of the second connecting pipes are provided, and the plurality of the second connecting pipes are symmetrically arranged with respect to the first connecting pipe.

3. A wet flue gas desulfurization tower as claimed in claim 2, characterized in that: The first atomizing nozzles on the first connecting pipe and the first atomizing nozzles on the second connecting pipe are arranged alternately at intervals.

4. A wet flue gas desulfurization tower as claimed in claim 3, characterized in that: The diameter of the water supply pipe is set to decrease gradually to improve water supply efficiency and reduce energy loss; The diameters of the first connecting pipe and the second connecting pipe are gradually reduced and extend outward from both sides of the water supply pipe.

5. A wet flue gas desulfurization tower according to any one of claims 1 to 4, characterized in that: The plurality of the second atomizing nozzles are arranged in a staggered manner in multiple layers, so that the spray liquid injected is in a spiral shape.

6. A wet flue gas desulfurization tower according to claim 5, characterized in that: At least one vent hole is arranged on the efficiency enhancement baffle.

7. A wet flue gas desulfurization tower according to claim 6, characterized in that: The vent hole is provided with a first inclined plate and a second inclined plate arranged alternately, and an S-shaped channel is formed between the first inclined plate and the second inclined plate.

8. A wet flue gas desulfurization tower according to claim 7, characterized in that: The first inclined plate and the second inclined plate are both provided with leakage holes for allowing the desulfurizer to pass through and be evenly distributed in the flue gas.

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