Multistage spray absorption device for desulfurization tower

Abstract

The utility model provides a kind of desulfurization tower multistage spray absorption device, it is related to tail gas treatment technical field, including desulfurization tower, desulfurization tower includes air inlet pipe and gas outlet pipe, and desulfurization tower inside is provided with multistage spray absorption component, further including filter piece and multiple placing frame, and the bottom surface of each placing frame is all provided with several flow-through holes;The branch pipe line below multistage spray absorption component in the desulfurization tower inside of the present application is sequentially provided with filler layer, which can further improve the absorption treatment effect of flue gas, and the probability of subsequent nozzle blockage or suction pump wear can be reduced by the pre-filtering element + filler, thereby prolonging the service life of the desulfurization tower and the spray absorption effect of flue gas is more optimal.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment technology, and more specifically, to a multi-stage spray absorption device for a desulfurization tower. Background Technology

[0002] Spray desulfurization towers are a commonly used flue gas desulfurization equipment. Their main working principle is to contact and react flue gas with sprayed liquid, so that sulfur oxides (such as sulfur dioxide) in the flue gas are converted into water-soluble compounds, thereby achieving the purpose of desulfurization.

[0003] Current multi-stage spray desulfurization towers typically introduce flue gas from one side of the bottom, and then discharge it from the top of the tower after multiple spray absorption treatments. However, solid particles (such as dust and metal shavings) in the flue gas can easily clog nozzles or wear down water pumps. Existing desulfurization towers lack pre-filtration designs, and the mass transfer rate of simple nozzle atomization spraying is not high. Therefore, the spray absorption effect of existing desulfurization towers on high-sulfur and complex flue gas composition needs to be improved. Utility Model Content

[0004] The purpose of this invention is to solve the problems mentioned in the background art, and to propose a multi-stage spray absorption device for desulfurization towers.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A multi-stage spray absorption device for a desulfurization tower includes a desulfurization tower, which includes an inlet pipe and an outlet pipe. The desulfurization tower is equipped with a multi-stage spray absorption assembly, a filter element, and multiple placement frames. Each placement frame has several flow holes on its bottom surface. The desulfurization tower has a first insertion hole that matches the size of the filter element and a number of second insertion holes that match the size of the placement frame and correspond one-to-one. The first insertion hole is located above the air inlet pipe. The number of second insertion holes are located above the first insertion hole and are equidistantly distributed along the height direction of the desulfurization tower and are interspersed with the branch pipes of the multi-stage spray absorption assembly. The second insertion holes are located below the branch pipes of the multi-stage spray absorption assembly. Multiple sets of installation components are movably connected to the filter element and the placement frame, and the installation components and the outer wall of the desulfurization tower are accurately connected and fixed together by the limiting components; Several packing materials are placed inside the placement frame, with the height of the packing materials lower than the height of the placement frame; The segmented conveying assembly inside the desulfurization tower is connected to the air inlet pipe and is located below the filter.

[0006] Furthermore, the mounting assembly includes a mounting plate, a handle, and an annular protrusion. The mounting plate is movably connected to the filter element / placement frame; The handle is located on the outside of the mounting plate; The annular protrusion is located on the inner side of the mounting plate and outside the filter element and the placement frame. An annular groove that matches the annular protrusion is opened on the outer wall of the desulfurization tower, and a sealing ring is installed in the annular groove.

[0007] Furthermore, the limiting assembly includes an insertion roller, a connecting plate, and an insertion hole. Multiple sets of insert rollers, each corresponding to the first and second insertion holes, are welded to the outer wall of the desulfurization tower, and each set includes two insert rollers. The connecting plates are symmetrically welded onto each mounting plate, and the connecting plates have insertion holes that correspond one-to-one with the insertion rollers and are of the appropriate size.

[0008] Furthermore, each of the mounting plates connected to the filter element / placement frame is provided with several fixing bolts, which pass through the mounting plate and are threadedly connected to the outer wall of the desulfurization tower.

[0009] Furthermore, the segmented conveying assembly includes a conveying pipe, branch pipes, and an electric valve. The conveying pipe is fixed inside the bottom of the desulfurization tower and is connected to the inlet pipe; Several vertically upward branch pipes are connected to the delivery pipe, and each branch pipe is equipped with an independently controlled electric valve.

[0010] Compared with the prior art, the beneficial effects of this utility model are: (1) This application can further improve the absorption and treatment effect of flue gas by sequentially setting a packing layer below the branch pipe of the multi-stage spray absorption component inside the desulfurization tower. At the same time, the probability of subsequent nozzle blockage or suction pump wear can be reduced by the pre-filter + packing, thereby extending the service life of the desulfurization tower and improving the spray absorption effect of flue gas. (2) As flue gas is continuously introduced, the flow path of flue gas is switched sequentially by the segmented conveying component, so that the flue gas can effectively pass through multiple areas of the filter element, thereby improving the overall utilization rate of the filter element. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 Schematic diagram of the flow hole; Figure 3 for Figure 1 Enlarged view of section A (labeled A); Figure label: 1. Desulfurization tower; 101. Inlet pipe; 102. Outlet pipe; 103. Multi-stage spray absorption assembly; 2. Filter element; 3. Placement frame; 4. Flow hole; 5. Mounting assembly; 51. Mounting plate; 52. Handle; 53. Annular protrusion; 6. Limiting assembly; 61. Insert roller; 62. Connecting plate; 7. Segmented conveying assembly; 71. Conveying pipe; 72. Branch pipe; 73. Electric valve; 8. Fixing bolt. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments: like Figures 1 to 3 As shown, a multi-stage spray absorption device for a desulfurization tower includes a desulfurization tower 1, which includes an inlet pipe 101 and an outlet pipe 102. The desulfurization tower 1 is equipped with a multi-stage spray absorption assembly 103, a filter element 2, and multiple placement frames 3. Each placement frame 3 has several flow holes 4 on its bottom surface. The desulfurization tower 1 has a first insertion hole that matches the size of the filter element 2 and a plurality of second insertion holes that match the size of the placement frame 3 and correspond one-to-one. The first insertion hole is located above the air inlet pipe 101. The plurality of second insertion holes are located above the first insertion hole and are equidistantly distributed along the height direction of the desulfurization tower 1 and are staggered with the branch pipes 72 of the multi-stage spray absorption assembly 103. The second insertion holes are located below the branch pipes 72 of the multi-stage spray absorption assembly 103 (neither the first nor the second insertion holes are shown in the figure). Multiple sets of installation components 5 are movably connected to the filter element 2 and the placement frame 3 respectively, and the installation components 5 and the outer wall of the desulfurization tower 1 are accurately connected and fixed together by the limiting components 6. Several fillers are placed inside the placement frame 3, and the height of the fillers is lower than the height of the placement frame 3; The segmented conveying assembly 7, located inside the desulfurization tower 1, is connected to the air inlet pipe 101 and is located below the filter element 2.

[0013] Specific implementation of this utility model solution, such as Figure 1 and Figure 3 As shown, the mounting component 5 includes a mounting plate 51, a handle 52, and an annular protrusion 53. Mounting plate 51 is movably connected to filter element 2 / placement frame 3; The handle 52 is located on the outside of the mounting plate 51; The annular protrusion 53 is located inside the mounting plate 51 and outside the filter element 2 and the placement frame 3. The outer wall of the desulfurization tower 1 is provided with an annular groove that matches the annular protrusion 53, and a sealing ring is provided in the annular groove (the annular groove is not labeled in the figure, and the sealing ring is not shown in the figure).

[0014] Further refinements of the embodiments of this utility model, such as... Figure 1 and Figure 3 As shown, several fixing bolts 8 are provided on the mounting plate 51 connected to the filter element 2 / placement frame 3. The fixing bolts 8 pass through the mounting plate 51 and are threadedly connected to the outer wall of the desulfurization tower 1.

[0015] Specific implementation of this utility model solution, such as Figure 1 and Figure 3 As shown, the limiting component 6 includes an insertion roller 61, a connecting plate 62, and an insertion hole (not shown in the figure). Multiple sets of insert rollers 61, corresponding one-to-one with the first and second insert holes, are welded to the outer wall of the desulfurization tower 1, and each set includes two insert rollers 61. The connecting plate 62 is symmetrically welded onto each mounting plate 51, and the connecting plate 62 has insertion holes that correspond one-to-one with the insertion roller 61 and are of suitable size.

[0016] Specific implementation of this utility model solution, such as Figure 1 and Figure 3 As shown, the segmented conveying assembly 7 includes a conveying pipe 71, a branch pipe 72, and an electric valve 73. The conveying pipe 71 is fixed at the bottom of the desulfurization tower 1 and is connected to the inlet pipe 101. Several vertically upward branch pipes 72 are connected to the conveying pipe 71, and each branch pipe 72 is equipped with an independently controlled electric valve 73.

[0017] Specifically, each electric valve 73's drive module is independently controlled by a relay, and the relay coil is driven by the digital output terminal of the PLC controller; The valve position feedback signal is connected to the PLC analog input channel to switch the opening of electric valves 73 on different branch pipes 72 as needed (only one electric valve is open during flue gas introduction, and the rest are closed). After all three areas of the filter have carried out a round of flue gas filtration, the filter can be removed for replacement or cleaning.

[0018] It should be noted that the suction pump and electric valve 73 in the multi-stage spray absorption assembly 103 are electrically connected to the PLC controller, which is not shown in the figure.

[0019] The working process of this utility model: First, flue gas enters through the inlet pipe 101 and flows into the delivery pipe 71. Initially, the electric valve 73 on the leftmost branch pipe 72 is opened, and the remaining electric valves 73 are closed. Then, the flue gas flows upward and passes through the left side of the filter element 2, filtering out solid particles in the flue gas. As the flue gas continues to enter, the left side of the filter element 2 is gradually blocked. Then, the remaining electric valves 73 are switched, so that the electric valves 73 in the center and right side of the filter element 2 open in sequence to filter solid particles in the flue gas. The significance of this design is to improve the overall utilization rate of the filter element 2. The filtered flue gas then continues to flow upwards through the packing layer. At this point, the controller controls the low-pressure spray absorption liquid in the multi-stage spray absorption assembly 103. The significance of the packing is as follows: 1. Increase the gas-liquid contact area The porous structure of the packing material can disperse the spray liquid into liquid films or droplets, increasing the effective contact area per unit volume by 5-10 times; 2. Enhance mass transfer and reaction kinetics The liquid film formed on the packing surface prolongs the gas-liquid contact time, promoting a full reaction between SO2 and the desulfurizing agent (such as limestone slurry). The desulfurization mass transfer rate can be increased from 70% in empty tower spraying to over 95%. 3. Improve fluid distribution uniformity The packing layer can suppress flue gas short circuits or eddies, prevent local accumulation of spray liquid, and reduce desulfurization blind spots; In summary, by sequentially setting a packing layer below the branch pipes of the multi-stage spray absorption assembly 103, the absorption and treatment effect of flue gas can be further improved. At the same time, the probability of subsequent nozzle blockage or suction pump wear can be reduced by using the pre-filter 2 + packing, thereby extending the service life of the desulfurization tower 1. If the filter element 2 or the packing layer becomes clogged after a period of use, first remove the fixing bolts 8, then pull the handle 52 to discharge the material from both. Then, clean or replace the packing and filter element 2. After maintenance, accurately insert both the limiting component 6 and the installation component 5 into the desulfurization tower 1 for the next round of use. The sealing effect is excellent after insertion.

[0020] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-stage spray absorption device for a desulfurization tower, comprising a desulfurization tower (1), the desulfurization tower (1) including an inlet pipe (101) and an outlet pipe (102), and wherein a multi-stage spray absorption assembly (103) is provided inside the desulfurization tower (1), characterized in that, It also includes a filter element (2) and multiple placement frames (3), and each placement frame (3) has several flow holes (4) on its bottom surface. The desulfurization tower (1) is provided with a first insertion hole that matches the size of the filter element (2) and a number of second insertion holes that match the size of the placement frame (3) and correspond one-to-one. The first insertion hole is located above the air inlet pipe (101). The number of second insertion holes are located above the first insertion hole and are equidistantly distributed along the height direction of the desulfurization tower (1) and are interspersed with the branch pipes of the multi-stage spray absorption assembly (103). The second insertion holes are located below the branch pipes of the multi-stage spray absorption assembly (103). Multiple sets of installation components (5) are movably connected to the filter element (2) and the placement frame (3) respectively, and the installation components (5) and the outer wall of the desulfurization tower (1) are accurately connected and fixed together by the limiting components (6); Several fillers are placed inside the placement frame (3), and the height of the fillers is lower than the height of the placement frame (3); The segmented conveying assembly (7) located inside the desulfurization tower (1) is connected to the air inlet pipe (101) and is located below the filter element (2).

2. The multi-stage spray absorption device for desulfurization tower according to claim 1, characterized in that, The mounting assembly (5) includes a mounting plate (51), a handle (52), and an annular protrusion (53). The mounting plate (51) is movably connected to the filter element (2) / placement frame (3); The handle (52) is located on the outside of the mounting plate (51); The annular protrusion (53) is located inside the mounting plate (51) and outside the filter element (2) and the placement frame (3). The outer wall of the desulfurization tower (1) is provided with an annular groove that matches the annular protrusion (53), and a sealing ring is provided in the annular groove.

3. The multi-stage spray absorption device for desulfurization towers according to claim 2, characterized in that, The limiting component (6) includes an insertion roller (61), a connecting plate (62), and an insertion hole. Multiple sets of insert rollers (61) corresponding one-to-one with the first and second insert holes are welded on the outer wall of the desulfurization tower (1), and each set includes two insert rollers (61). The connecting plate (62) is symmetrically welded on each mounting plate (51), and the connecting plate (62) has a hole that corresponds to the insert roller (61) and is sized to fit it.

4. The multi-stage spray absorption device for desulfurization tower according to claim 1, characterized in that, The segmented conveying assembly (7) includes a conveying pipe (71), a branch pipe (72), and an electric valve (73). The conveying pipe (71) is fixed at the bottom of the desulfurization tower (1) and is connected to the inlet pipe (101); Several vertically upward branch pipes (72) are connected to the delivery pipe (71), and each branch pipe (72) is equipped with an independently controlled electric valve (73).

5. A multi-stage spray absorption device for a desulfurization tower according to claim 2, characterized in that, Several fixing bolts (8) are provided on the mounting plate (51) connected to the filter element (2) / placement frame (3). The fixing bolts (8) pass through the mounting plate (51) and are threaded to the outer wall of the desulfurization tower (1).

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