Wet desulphurization system prepared by blending carbide slag and limestone

Abstract

The utility model relates to the technical field of flue gas desulfurization, in particular to a wet desulfurization system for blending carbide slag and limestone, which comprises a tower body, the bottom edge of the tower body is respectively and fixedly connected with a slurry tank, a slurry discharge pump and an oxidation fan through mounting plates, and a stirring component is arranged at the bottom of the inner side of the tower body. A spraying assembly is fixedly connected to the middle of the top surface of the stirring assembly, a cleaning assembly is arranged in the middle of the stirring assembly, a demister is fixedly connected between the inner walls of the top of the inner side of the tower body, and an exhaust pipe is welded to one side of the top of the tower body. According to the improved wet desulfurization system, slurry at the bottom in the tower body can be stirred through the stirring assembly, so that carbide slag and the slurry at the bottom in the tower body react more sufficiently, the desulfurization effect is improved, alkaline slurry is thrown out from the spraying holes in the bottom of the spraying box through the spraying assembly, flue gas in the tower body is desulfurized, and the desulfurization efficiency is improved. And the slurry at the bottom in the tower body is matched to perform dual desulfurization on the flue gas, so that the desulfurization effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization, in particular to a wet desulfurization system using carbide slag and limestone mixed together. Background Art

[0002] Calcium carbide slag is the waste product after calcium carbide reacts with water to prepare acetylene. It is estimated that millions of tons of calcium carbide slag are piled up in the open air in my country every year, and the amount is increasing year by year. It not only occupies precious land resources, but also pollutes the soil and shallow groundwater. Desulfurization using waste calcium carbide slag can achieve the goal of treating waste with waste, turning waste into treasure, and reducing the pollution of solid waste to the environment. It has obvious environmental, social and economic benefits. Calcium carbide slag is mixed with limestone to make a strong alkaline slurry to neutralize the sulfur dioxide in the flue gas, thereby completing the desulfurization of the flue gas and achieving the purpose of flue gas purification. Therefore, we have launched a wet desulfurization system using a mixture of calcium carbide slag and limestone.

[0003] The existing patent (publication number: CN207886967U) discloses a calcium carbide slag gypsum wet desulfurization tower, including a desulfurization tower body, a demister is fixedly installed on the upper side of the interior of the desulfurization tower body, and the demister is electrically connected to an external power supply, a dredging device is fixedly installed at the center of the inner rear surface of the desulfurization tower body, and the dredging device is located below the demister, an air outlet pipe is fixedly installed on the upper side of the outer right surface of the desulfurization tower body, and the left end of the air outlet pipe is connected to the upper side of the outer right surface of the desulfurization tower body, and a slurry pool, a calcium carbide slag slurry pump, a circulation pump and a slurry discharge pump are fixedly installed in sequence from top to bottom on the lower side of the outer right surface of the desulfurization tower body. The calcium carbide slag gypsum wet desulfurization tower solves the problem that the aqueous solution in the existing gypsum wet desulfurization tower contains sulfuric acid, sulfate, and sulfur dioxide, which may weaken the demisting effect of the demister, and the discharged slurry is easy to overflow from the liquid outlet pipe and corrode surrounding devices. The existing technology has the following problems: 1. When the existing desulfurization device is in use, the slurry at the bottom of the tower is stirred by a horizontally installed stirrer, but the stirring direction is single and the stirring effect is poor; 2. The existing desulfurization device only injects flue gas into the solution for reaction, and uses alkaline solution to neutralize the acidic substances in the flue gas to achieve the purpose of desulfurization, but this method has a single desulfurization effect and is limited. Utility Model Content

[0004] The utility model aims to provide a wet desulfurization system using carbide slag and limestone in a mixed manner, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wet desulfurization system for carbide slag and limestone, comprising a tower body, the bottom edge of the tower body is respectively fixedly connected with a slurry box, a slurry pump and an oxidation fan through a mounting plate, a stirring assembly is provided at the inner bottom of the tower body, a spray assembly is fixedly connected to the middle of the top surface of the stirring assembly, a cleaning assembly is provided in the middle of the stirring assembly, a demister is fixedly connected between the inner walls of the inner top of the tower body, and an exhaust pipe is welded to one side of the top of the tower body;

[0006] The stirring assembly includes a motor fixedly connected to one side of a tower body, the output end of the motor is fixedly connected to a transmission shaft 1, the end of the transmission shaft 1 away from the motor is fixedly connected to a main bevel gear, the edges of the main bevel gear are respectively meshed with a sub-bevel gear 1 and a sub-bevel gear 2, a stirring shaft is fixedly connected to the middle of the bottom surface of the sub-bevel gear 1, the outer surface of the stirring shaft is fixedly connected to an inner stirring blade, the bottom surface of the sub-bevel gear 2 is fixedly connected to a rotating cylinder, the outer surfaces of the rotating cylinder are respectively provided with external stirring blades and a hollow connecting frame, and the outer edge of the hollow connecting frame is welded to the inner wall of the tower body.

[0007] Preferably, the outer stirring blade and the inner stirring blade are both inverted L-shaped, and the horizontal section length of the outer stirring blade is greater than that of the inner stirring blade, and the vertical sections of the outer stirring blade and the inner stirring blade are both provided with circular holes.

[0008] Preferably, the spray assembly includes a second transmission shaft fixedly connected to the middle of the top surface of the secondary bevel gear, and a spray box is fixedly connected to the top end of the second transmission shaft.

[0009] Preferably, a plurality of spray holes are provided on the bottom surface of the spray box, and the plurality of spray holes are inclined toward the edge of the spray box.

[0010] Preferably, the top surface of the spray box is connected to one end of the infusion tube through a rotary joint, and the other end of the infusion tube is communicated with the top of the slurry pump.

[0011] Preferably, one side of the slurry pump is connected to the interior of the tower body through a pipeline, and the other side of the slurry pump is connected to the slurry tank.

[0012] Preferably, the cleaning assembly comprises a main sprocket fixedly connected to a middle portion of a transmission shaft, and the main sprocket is connected to a secondary sprocket via a chain.

[0013] Preferably, a reciprocating screw is fixedly connected to the middle portion of the secondary sprocket, and a cleaning strip is movably connected to the middle portion of the reciprocating screw.

[0014] Preferably, a limiting rod passes through the middle of the cleaning strip, and both ends of the limiting rod are welded to the inner wall of the tower body.

[0015] Preferably, the slurry discharge pump and the oxidation fan are both connected to the interior of the tower body through pipelines.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] In the utility model, the slurry at the bottom of the tower body can be stirred by a stirring component, and the stirring component can rotate counterclockwise and clockwise at the same time to improve the stirring effect, so that the calcium carbide slag and the slurry at the bottom of the tower body can react more fully, thereby improving the desulfurization effect, and the aqueous solution produced by desulfurization will rise to the demister and be adsorbed by the demister. When the stirring component is operating, it will also drive the cleaning component to reciprocately clean the demister to ensure that the demister is not blocked.

[0018] In the utility model, the carbide slag and limestone slurry in the slurry box are injected into the bottom of the tower body by starting the slurry pump. At the same time, the slurry pump also injects a part of the slurry into the spray box through the infusion pipe. Under the action of the stirring component, the spray box is driven to rotate, and the slurry in the box is thrown out from the bottom spray hole. The spray hole is inclined toward the edge of the spray box, which can expand the spray range, desulfurize the flue gas in the tower body, and cooperate with the slurry at the bottom of the tower body to carry out double desulfurization of the flue gas, so as to achieve better desulfurization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the main three-dimensional structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model in front view;

[0021] Figure 3 For this utility model Figure 2 A is an enlarged structural diagram;

[0022] Figure 4 For this utility model Figure 2 The enlarged structural diagram at B in FIG.

[0023] Figure 5 For this utility model Figure 2 The enlarged structural diagram at C in the figure.

[0024] In the figure: 1. tower body; 2. slurry box; 3. stirring assembly; 301. motor; 302. transmission shaft 1; 303. main bevel gear; 304. secondary bevel gear 1; 305. secondary bevel gear 2; 306. stirring shaft; 307. inner stirring blade; 308. rotating cylinder; 309. outer stirring blade; 3010. hollow connecting frame; 4. slurry discharge pump; 5. oxidation fan; 6. spray assembly; 601. transmission shaft 2; 602. spray box; 603. spray hole; 604. infusion tube; 605. slurry pump; 7. cleaning assembly; 701. main sprocket; 702. secondary sprocket; 703. reciprocating screw; 704. cleaning strip; 705. limit rod; 8. demister; 9. exhaust pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figures 1 to 5 The utility model provides a technical solution: a wet desulfurization system using carbide slag and limestone as a mixture, comprising a tower body 1, the bottom edge of the tower body 1 is fixedly connected with a slurry box 2, a slurry pump 4 and an oxidation fan 5 through a mounting plate, a stirring assembly 3 is provided at the inner bottom of the tower body 1, a spray assembly 6 is fixedly connected to the middle of the top surface of the stirring assembly 3, a cleaning assembly 7 is provided in the middle of the stirring assembly 3, a demister 8 is fixedly connected between the inner walls of the inner top of the tower body 1, and an exhaust pipe 9 is welded to one side of the top of the tower body 1.

[0027] In this embodiment, Figure 2 and Figure 3As shown, the stirring assembly 3 includes a motor 301 fixedly connected to one side of the tower body 1, the output end of the motor 301 is fixedly connected to a transmission shaft 1 302, the end of the transmission shaft 1 302 away from the motor 301 is fixedly connected to a main bevel gear 303, the edges of the main bevel gear 303 are respectively meshed with a sub-bevel gear 1 304 and a sub-bevel gear 2 305, a stirring shaft 306 is fixedly connected to the middle of the bottom surface of the sub-bevel gear 1 304, the outer surface of the stirring shaft 306 is fixedly connected to an inner stirring blade 307, the bottom surface of the sub-bevel gear 2 305 is fixedly connected to a rotating cylinder 308, and the outer surface of the rotating cylinder 308 is respectively provided with an outer stirring blade 309 and a hollow connecting frame 3 010, the outer edge of the hollow connecting frame 3010 is welded to the inner wall of the tower body 1, the outer stirring blade 309 and the inner stirring blade 307 are both inverted L-shaped, and the horizontal section length of the outer stirring blade 309 is greater than the horizontal section length of the inner stirring blade 307, and the vertical sections of the outer stirring blade 309 and the inner stirring blade 307 are both provided with circular holes; this structure can prevent the outer stirring blade 309 and the inner stirring blade 307 from interfering with each other during rotation, and the circular holes provided in the vertical section of the stirring rod can enhance the stirring effect and break up the slurry during stirring. In addition, the rotation directions of the outer stirring blade 309 and the inner stirring blade 307 are opposite, which is more efficient than the traditional unidirectional stirring method.

[0028] In this embodiment, Figure 1 , Figure 2 and Figure 4 As shown, the spray assembly 6 includes a transmission shaft 2 601 fixedly connected to the middle of the top surface of the secondary bevel gear 1 304, and a spray box 602 is fixedly connected to the top of the transmission shaft 2 601. The bottom surface of the spray box 602 is provided with a plurality of spray holes 603, and the plurality of spray holes 603 are inclined toward the edge of the spray box 602. The top surface of the spray box 602 is connected to one end of the infusion tube 604 through a rotating joint, and the other end of the infusion tube 604 is connected to the top of the slurry pump 605. One side of the slurry pump 605 is connected to the inside of the tower body 1 through a pipeline, and the other side of the slurry pump 605 is connected to the inside of the tower body 1 through a pipeline. It is connected to the slurry tank 2; the spray box 602 is driven to rotate synchronously by the rotation of the stirring component 3, and the calcium carbide slag and limestone slurry in the slurry tank 2 are transported to the interior of the spray box 602 through the infusion pipe 604 under the action of the slurry pump 605, and finally sprayed out from the spray hole 603 on the bottom of the spray box 602 to neutralize the sulfur dioxide in the flue gas in the tower body 1 to achieve the purpose of desulfurization. The spraying is mainly for further desulfurization of the flue gas discharged from the slurry at the bottom of the tower body 1 to prevent the residual sulfur dioxide in the flue gas from being completely neutralized. The double separation process makes the desulfurization effect better.

[0029] In this embodiment, Figure 2 and Figure 5As shown, the cleaning assembly 7 includes a main sprocket 701 fixedly connected to the middle part of the transmission shaft 302, the main sprocket 701 is connected to the secondary sprocket 702 through a chain, the middle part of the secondary sprocket 702 is fixedly connected to a reciprocating screw 703, the middle part of the reciprocating screw 703 is movably connected to a cleaning strip 704, the middle part of the cleaning strip 704 passes through a limiting rod 705, and the two ends of the limiting rod 705 are welded to the inner wall of the tower body 1; when the transmission shaft 302 rotates, the main sprocket 701 will be driven to rotate with the transmission shaft 302 as the axis, and when the transmission shaft 302 rotates, the reciprocating screw 703 will be driven to rotate through the chain and the secondary sprocket 702, thereby driving the cleaning strip 704 to move back and forth, scraping off impurities on the lower surface of the demister 8, and the scraped impurities will fall to the bottom of the tower body 1, and finally discharged from the tower body 1 together with the slurry through the slurry discharge pump 4.

[0030] In this embodiment, Figure 1 As shown, the slurry discharge pump 4 and the oxidation fan 5 are both connected to the interior of the tower body 1 through pipelines; the slurry discharge pump 4 is mainly used to discharge the limestone and carbide slag slurry from the tower body 1 after the reaction is completed, and the oxidation fan 5 is mainly used to transport oxygen into the slurry to oxidize the calcium sulfite in the carbide slag into calcium sulfate to facilitate subsequent reactions.

[0031] The use method and advantages of the utility model: When the wet desulfurization system using carbide slag and limestone is used, the working process is as follows:

[0032] By starting the slurry pump 605, the carbide slag and limestone slurry in the slurry box 2 are injected into the bottom of the tower body 1. At the same time, the slurry pump 605 also injects a part of the slurry into the spray box 602 through the infusion pipe 604. Under the action of the stirring component 3, the spray box 602 is driven to rotate, and the slurry in the box is thrown out from the bottom spray hole 603, and the spray hole 603 is inclined to the edge of the spray box 602, which can expand the spray range, desulfurize the flue gas in the tower body 1, and cooperate with the slurry at the bottom of the tower body 1 to perform double desulfurization on the flue gas, so as to achieve better desulfurization effect. The stirring component 3 can stir the slurry at the bottom of the tower body 1, so that the carbide slag and the slurry at the bottom of the tower body 1 react more fully, thereby improving the desulfurization effect. The aqueous solution produced by desulfurization will rise to the demister 8 and be adsorbed by the demister 8. When the stirring component 3 is in operation, it will also drive the cleaning component 7 to reciprocate and clean the demister 8 to ensure that the demister 8 is not blocked.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Technical staff in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A wet desulfurization system using carbide slag and limestone as a mixture, comprising a tower body (1), characterized in that: The bottom edge of the tower body (1) is respectively fixedly connected to a slurry box (2), a slurry discharge pump (4) and an oxidation fan (5) through a mounting plate; a stirring assembly (3) is provided at the inner bottom of the tower body (1); a spray assembly (6) is fixedly connected to the middle of the top surface of the stirring assembly (3); a cleaning assembly (7) is provided in the middle of the stirring assembly (3); a demister (8) is fixedly connected between the inner walls of the inner top of the tower body (1); and an exhaust pipe (9) is welded to one side of the top of the tower body (1); The stirring assembly (3) comprises a motor (301) fixedly connected to one side of the tower body (1); the output end of the motor (301) is fixedly connected to a transmission shaft 1 (302); the end of the transmission shaft 1 (302) away from the motor (301) is fixedly connected to a main bevel gear (303); the edges of the main bevel gear (303) are respectively meshed with a secondary bevel gear 1 (304) and a secondary bevel gear 2 (305); a stirring shaft (306) is fixedly connected to the middle of the bottom surface of the secondary bevel gear 1 (304); an inner stirring blade (307) is fixedly connected to the outer surface of the stirring shaft (306); a rotating cylinder (308) is fixedly connected to the bottom surface of the secondary bevel gear 2 (305); the outer surface of the rotating cylinder (308) is respectively provided with an outer stirring blade (309) and a hollow connecting frame (3010); the outer edge of the hollow connecting frame (3010) is welded to the inner wall of the tower body (1).

2. A wet desulfurization system using carbide slag and limestone as blended materials according to claim 1, characterized in that: The outer stirring blade (309) and the inner stirring blade (307) are both inverted L-shaped, and the horizontal section length of the outer stirring blade (309) is greater than the horizontal section length of the inner stirring blade (307). The vertical sections of the outer stirring blade (309) and the inner stirring blade (307) are both provided with circular holes.

3. A wet desulfurization system using carbide slag and limestone as blended materials according to claim 1, characterized in that: The spray assembly (6) comprises a second transmission shaft (601) fixedly connected to the middle of the top surface of the secondary bevel gear (304), and a spray box (602) is fixedly connected to the top of the second transmission shaft (601).

4. A wet desulfurization system using carbide slag and limestone as blended materials according to claim 3, characterized in that: The bottom surface of the spray box (602) is provided with a plurality of spray holes (603), and the plurality of spray holes (603) are all inclined toward the edge of the spray box (602).

5. A wet desulfurization system using carbide slag and limestone as blended according to claim 4, characterized in that: The top surface of the spray box (602) is connected to one end of the infusion tube (604) via a rotary joint, and the other end of the infusion tube (604) is connected to the top of the slurry pump (605).

6. A wet desulfurization system using carbide slag and limestone as a mixture according to claim 5, characterized in that: One side of the slurry pump (605) is connected to the interior of the tower body (1) through a pipeline, and the other side of the slurry pump (605) is connected to the slurry tank (2).

7. A wet desulfurization system using carbide slag and limestone as a mixture according to claim 1, characterized in that: The cleaning assembly (7) comprises a main sprocket (701) fixedly connected to the middle of the transmission shaft (302), and the main sprocket (701) is connected to the secondary sprocket (702) through a chain.

8. A wet desulfurization system using carbide slag and limestone as a mixture according to claim 7, characterized in that: The middle part of the secondary sprocket (702) is fixedly connected to a reciprocating screw (703), and the middle part of the reciprocating screw (703) is movably connected to a cleaning strip (704).

9. A wet desulfurization system using carbide slag and limestone as a mixture according to claim 8, characterized in that: The middle part of the cleaning strip (704) passes through a limiting rod (705), and both ends of the limiting rod (705) are welded to the inner wall of the tower body (1).

10. A wet desulfurization system using carbide slag and limestone as a mixture according to claim 1, characterized in that: The slurry discharge pump (4) and the oxidation fan (5) are both connected to the interior of the tower body (1) through pipelines.

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