Flue gas wet desulphurization spray tower

Abstract

The utility model relates to the technical field of wet desulphurization, in particular to a flue gas wet desulphurization spray tower, which comprises a spray tower, a slurry storage area is arranged at the lower part in the spray tower, and a spray area is arranged at the upper part in the spray tower; the side face of the spraying area is provided with an air inlet, and the top end is provided with an exhaust port; the slurry storage area of the spray tower is communicated with the spray area through a pumping system, one end, communicated with the spray area, of the pumping system is connected with a first connecting pipe, and the first connecting pipe is positioned at the upper part in the spray area. Through the design of the inverted-cone-shaped flow guide frame, flue gas is guided into a concentrated upward flowing path, it is ensured that the flue gas can make full contact with slurry, then the stirring propeller and the waterproof motor are assembled, the stirring propeller can be driven by the waterproof motor to rotate, mixing of the flue gas and an absorbent is further promoted, the reaction area is increased, the reaction time is prolonged, and the reaction efficiency is improved. Therefore, the reaction rate and the desulfurization effect are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of wet desulphurization, especially to a flue gas wet desulphurization spray tower. BACKGROUND

[0002] Among many flue gas desulfurization technologies, wet desulfurization uses alkaline absorbent to chemically react with sulfur dioxide in flue gas, converting sulfur dioxide into solid byproducts, thereby removing sulfur dioxide. It is widely used due to its high efficiency, mature technology, and relatively low cost.

[0003] Patent No. CN218871717U discloses a wet flue gas desulfurization and denitrification spraying equipment. The patent transports the absorbent liquid into the working housing through the spraying pump and the output pipeline, and sprays the absorbent liquid evenly on the flue gas in the working tank through multiple spraying holes. To ensure effective recovery of the absorbent liquid, the patent designs a buoyancy plate and an auxiliary pipe structure. When the solution collects at the bottom of the working tank, the buoyancy plate will drive the auxiliary pipe to rise, allowing the liquid pump to extract the solution through the liquid extraction pipe and the auxiliary pipe. In addition, the design also considers preventing untreated flue gas from being discharged through the auxiliary pipe. When the solution is insufficient to complete the closure, the action of the supporting spring will close the auxiliary pipe, preventing the escape of flue gas and ensuring the continuity and integrity of the spraying work. Although the above-mentioned patent provides an effective flue gas treatment scheme, there are still some deficiencies in actual application. The contact area between the solution and the flue gas in the patent is small, and the contact time is short, which leads to insufficient mixing and reaction between the two, ultimately affecting the desulfurization effect and efficiency, and reducing the overall desulfurization performance.

[0004] Therefore, it is urgent to provide a flue gas wet desulfurization spray tower that can improve desulfurization efficiency and effect. UTILITY MODEL CONTENT

[0005] To overcome the shortcomings of the existing patent wet desulfurization setting, where the contact area between the solution and the flue gas is small, the contact time is short, which leads to insufficient mixing and reaction between the two, ultimately affecting the desulfurization effect and efficiency, and reducing the overall desulfurization performance, the utility model provides a flue gas wet desulfurization spray tower that can improve desulfurization efficiency and effect.

[0006] To achieve the above problems, the utility model discloses the following technical scheme: a flue gas wet desulphurization spray tower, including spray tower, the lower part in the spray tower is slurry storage area, and the upper part in is spray area, the side of spray area is equipped with air inlet, and the top is equipped with exhaust port, the slurry storage area of spray tower is linked with spray area through pumping system, one end that pumping system communicates with spray area is connected with first connecting pipe, and the first connecting pipe is located in the upper part in spray area, a plurality of spray heads are uniformly arranged on the first connecting pipe, the support seat located above the first connecting pipe is fixed to the inner wall of spray area, the waterproof motor is installed on the support seat, the output shaft of waterproof motor is connected with stirring propeller through the key, and the upside of the lower part in spray area is provided with the inverted conical flow guide frame close to the air inlet.

[0007] Further, the inner side wall of the spray area is fixed with a support frame, the spray frame is rotatably installed on the support frame, the spray frame is communicated with the pumping system through a second connecting pipe, a wedge-shaped block is arranged on the spray frame, and the wedge-shaped block is in contact with the stirring propeller.

[0008] Further, a drain port is formed in the bottom of the spray area, a servo motor is installed beside the drain port, a spiral conveying rod is connected to the output shaft of the servo motor, and the spiral conveying rod is located inside the drain port.

[0009] Further, the waterproof motor is externally sleeved with a protective shell.

[0010] Further, the bottom end of the stirring propeller is connected with a stirring frame.

[0011] Further, the air inlet of the spray area is provided with a filter screen.

[0012] Compared with the prior art, the utility model has the following technical effects: 1. By designing the inverted conical flow guide frame, the flue gas is guided to flow in a concentrated upward path, ensuring that the flue gas can fully contact with the slurry. Then, the stirring propeller and the waterproof motor are assembled. The stirring propeller can rotate under the drive of the waterproof motor, further promoting the mixing of the flue gas and the absorbent, enhancing the reaction area and time, and thus improving the reaction rate and desulfurization effect.

[0013] 2. By designing the support frame, the second connecting pipe, the spray frame, and the wedge-shaped block, and cooperating with the stirring propeller, the rotation of the stirring propeller is used to drive the up-and-down swing of the spray frame, achieving wider spray coverage and better mixing effect, and significantly improving the performance of the flue gas wet desulphurization spray tower.

[0014] 3. By installing the servo motor driven spiral conveying rod in the drain port, the blockage problem during the discharge of the gypsum slurry can be effectively solved, and the operation efficiency and reliability of the entire flue gas wet desulphurization spray tower are improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a three-dimensional structure schematic view of the utility model.

[0016] Figure 2 It is a three-dimensional sectional structure schematic view of the utility model spray tower, pumping system and first connecting pipe.

[0017] Figure 3 It is a three-dimensional structure schematic view of the utility model second connecting pipe, spray frame and wedge block.

[0018] Figure 4 It is a three-dimensional sectional structure schematic view of the utility model spiral material conveying rod, protective shell and stirring frame.

[0019] Mark 1: spray tower, 2: pumping system, 3: first connecting pipe, 4: spray head, 5: support seat, 6: waterproof motor, 7: stirring propeller, 8: inverted conical flow guide frame, 9: support frame, 10: second connecting pipe, 11: spray frame, 12: wedge block, 13: servo motor, 14: spiral material conveying rod, 15: protective shell, 16: stirring frame, 17: filter screen. DETAILED DESCRIPTION

[0020] Although the utility model can be described in relation to a particular application or industry, those skilled in the art will recognize a broader applicability of the utility model. Those of ordinary skill in the art will recognize that terms such as: above, below, upward, downward, etc. are used to describe the drawings and are not meant to limit the scope of the utility model as defined by the appended claims. Any numerical designations such as: first or second are merely illustrative and are not intended to limit the scope of the utility model in any way.

[0021] Example 1: Please refer to Figure 1 , Figure 2 and Figure 4The utility model provides a kind of flue gas wet desulfurization spray tower, including spray tower 1, the lower part in the spray tower 1 is slurry storage area, the upper part in is spray area;The side of the spray area is equipped with air inlet, top is equipped with exhaust port, wherein, the air inlet of the spray area is provided with filter screen 17, the setting of the filter screen 17 can effectively intercept the large particle carried in flue gas, reduce the interference of these particulate matters to sulfur dioxide absorption, improve desulfurization efficiency;The slurry storage area of the spray tower 1 is communicated with spray area by pumping system 2, for supply limestone slurry, the one end that pumping system 2 is communicated with spray area is connected with first connecting pipe 3, the first connecting pipe 3 is located in the upper part of spray area, the first connecting pipe 3 is evenly arranged with multiple spray heads 4, to be used to limestone slurry evenly sprayed to flue gas, the support seat 5 located above first connecting pipe 3 is fixed on the inner wall of the spray area, waterproof motor 6 is installed on the support seat 5, waterproof motor 6 is equipped with protective shell 15 outside, the effect of protective shell 15 can effectively prevent water vapor, slurry and other impurities into motor inside, avoid motor to be damaged due to damp or corrosion, prolong its service life, the output shaft of waterproof motor 6 is connected with stirring propeller 7 by key, when motor operates, stirring propeller 7 can rotate, help to promote flue gas and limestone slurry under spraying fully mixed, the stirring propeller 7 bottom end is connected with stirring frame 16, the design of stirring frame 16 can significantly expand the stirring range of stirring propeller 7, the lower part of the spray area is provided with inverted conical flow guide frame 8 above air inlet, the design purpose of inverted conical flow guide frame 8 is to guide the flue gas entering to flow upward centrally, so that flue gas can better contact with limestone slurry sprayed from above, to increase desulfurization effect.

[0022] The flue gas generated from industrial boilers, incinerators and other equipment enters the lower part of the spray tower 1 through the gas inlet after being generated, and contains a certain concentration of sulfur dioxide. At the same time, the slurry is lifted to the spray area by the pumping system 2 through the pumping system 2, and is uniformly sprayed down through the multiple nozzles 4 on the first connecting pipe 3, forming fine droplets and countercurrently contacting with the flue gas. Due to the design of the inverted cone guide frame 8, the flue gas is guided to concentrate on the upward flow path, ensuring that it can fully contact with the sprayed slurry. In addition, the stirring propeller 7 driven by the waterproof motor 6 rotates in the spray area, further promoting the mixing of the flue gas and the slurry, increasing the contact area and time between the two, and improving the desulfurization efficiency. When the sulfur dioxide in the flue gas meets the limestone slurry sprayed down, a series of chemical reactions will occur. First, the sulfur dioxide dissolves in water to form sulfurous acid, and then the sulfurous acid reacts with the slurry to form calcium sulfite. During this process, part of the calcium sulfite may be further oxidized to calcium sulfate. These reaction products will settle to the bottom of the spray area along with the unreacted limestone to form gypsum slurry. After the above process, most of the sulfur dioxide in the flue gas has been removed, and the purified flue gas continues to move upward and is finally discharged from the spray tower 1 through the exhaust port into the atmospheric environment or for further treatment.

[0023] Example 2: Based on example 1, please refer to Figure 3 , the support frame 9 is fixed to the right side wall inside the spray area, and the spray frame 11 is rotatably installed on the support frame 9. The spray frame 11 is in communication with the pumping system 2 through the second connecting pipe 10 for spraying limestone slurry. The wedge-shaped block 12 is provided on the spray frame 11 and is in contact with the stirring propeller 7.

[0024] When the stirring propeller 7 rotates, the blades will periodically contact the wedge-shaped block 12 on the spray frame 11. When the blades of the stirring propeller 7 contact the wedge-shaped block 12, they will exert an upward thrust on the wedge-shaped block 12, causing the spray frame 11 to rotate upward around the support frame 9. As the spray frame 11 rotates upward, the angle of the spray frame 11 changes, causing the spray direction to change from horizontal to obliquely upward, thereby expanding the spray range and covering the dead angle area in the tower. When the stirring propeller 7 continues to rotate and disengages from the wedge-shaped block 12, the spray frame 11 automatically resets downward due to its own gravity. At this time, the spray direction returns to horizontal or near horizontal, ensuring uniform spray distribution. This periodic up-and-down movement forms a reciprocating swing of the spray frame 11, which not only increases the coverage of the spray, but also promotes the full mixing of the flue gas and the limestone slurry, thereby improving the desulfurization efficiency.

[0025] Please refer to Figure 4The bottom of the spraying area is provided with a liquid discharge port, a servo motor 13 is installed beside the liquid discharge port, a spiral conveying rod 14 is connected to the output shaft of the servo motor 13, and the spiral conveying rod 14 is located inside the liquid discharge port.

[0026] The gypsum slurry formed during the reaction gradually settles to the liquid discharge port at the bottom of the spraying tower 1, when it is necessary to discharge the gypsum slurry, the servo motor 13 is started, the output shaft of the servo motor 13 drives the spiral conveying rod 14 to rotate, the spiral conveying rod 14 exerts a forward thrust on the gypsum slurry during rotation, and the gypsum slurry is pushed out along the direction of the liquid discharge port, so that the discharge speed of the gypsum slurry is accelerated, and the problem of blockage of the liquid discharge port caused by too high slurry concentration or particle deposition is prevented.

[0027] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it can still be modified to the technical solutions recorded in the foregoing embodiments, or equivalent replacement of some of the technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application, should be included within the scope of the present application.

Claims

1. A wet flue gas desulfurization spray tower, comprising a spray tower (1), wherein the lower part of the spray tower (1) is a slurry storage area and the upper part is a spraying area; the spraying area is provided with an air inlet on its side and an exhaust outlet at its top; the slurry storage area and the spraying area of ​​the spray tower (1) are connected by a pumping system (2), and one end of the pumping system (2) connected to the spraying area is connected to a first connecting pipe (3), the first connecting pipe (3) is located in the upper part of the spraying area, and a plurality of nozzles (4) are evenly arranged on the first connecting pipe (3), characterized in that, The inner wall of the spray zone is fixedly connected to a support base (5) located above the first connecting pipe (3). A waterproof motor (6) is installed on the support base (5). A stirring propeller (7) is connected to the output shaft of the waterproof motor (6) by a key. An inverted conical guide frame (8) is provided above the air inlet in the lower part of the spray zone.

2. A wet flue gas desulfurization spray tower according to claim 1, characterized in that, A support frame (9) is fixed to the inner side wall of the spray zone. A spray frame (11) is rotatably mounted on the support frame (9). The spray frame (11) is connected to the pumping system (2) through a second connecting pipe (10). A wedge block (12) is provided on the spray frame (11). The wedge block (12) is in contact with the stirring propeller (7).

3. A wet flue gas desulfurization spray tower according to claim 2, characterized in that, A drain port is provided at the bottom of the spray zone. A servo motor (13) is installed next to the drain port. A spiral feed rod (14) is connected to the output shaft of the servo motor (13). The spiral feed rod (14) is located inside the drain port.

4. A wet flue gas desulfurization spray tower according to claim 3, characterized in that, The waterproof motor (6) is covered with a protective shell (15).

5. A wet flue gas desulfurization spray tower according to claim 4, characterized in that, The bottom end of the stirring paddle (7) is connected to the stirring frame (16).

6. A wet flue gas desulfurization spray tower according to claim 5, characterized in that, The air inlet of the spray zone is equipped with a filter screen (17).

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