Dedusting and cooling heat recovery tank for sulfur dioxide

Abstract

The utility model relates to the technical field of flue gas treatment, and provides a sulfur dioxide dedusting and cooling heat recovery tank which comprises a tank body, one end of the top of the tank body is fixedly connected with a gas inlet pipe, the bottom of the tank body is fixedly connected with a gas outlet pipe, the top end of the inner side of the tank body is fixedly connected with a dedusting mesh plate, and the bottom of the dedusting mesh plate is rotatably connected with a suction impeller. A motor is fixedly installed at the top of the tank body, a heat recovery mechanism is arranged at the bottom end of the inner side of the tank body and comprises two parallel partition plates, a plurality of heat exchange pipes distributed in an array mode are fixedly connected between the two partition plates, a cold water inlet pipe is fixedly connected to one side of the tank body, and a hot water outlet pipe is fixedly connected to the other side of the tank body. And an air guide mechanism is arranged below the air suction impeller. By means of the S-shaped water flow channel formed by the heat exchange pipes densely arranged between the parallel partition plates and the baffle plates, the contact time and path of cooling water and flue gas are remarkably prolonged, and full recovery of flue gas waste heat is achieved.

Description

Technical Field

[0001] This utility model relates to the field of flue gas treatment technology, specifically to a sulfur dioxide dust removal and cooling heat recovery tank. Background Technology

[0002] In industrial production, flue gas generated from coal combustion, metallurgy, chemical processes often contains a large amount of sulfur dioxide (SO2). Direct emissions of SO2 can cause problems such as acid rain, air pollution, and equipment corrosion. Therefore, flue gas desulfurization (FGD) technology has become a key link in environmental protection. Traditional SO2 treatment processes usually include three steps: dust removal, cooling, and desulfurization reaction.

[0003] A search revealed a Chinese patent (publication number: CN213761116U) disclosing "A device for treating and recovering waste heat from exhaust gas, comprising a heat-conducting mechanism and a dust removal mechanism. The heat-conducting mechanism includes a body and heat-conducting pipes. An installation plate is fixedly installed at the bottom of the body. The input end of the heat-conducting pipes passes through the installation plate. The heat-conducting pipes are spirally distributed in the middle of the body. Two L-shaped mounting seats are symmetrically installed at the top of the body. A steam turbine is rotatably installed between the two L-shaped mounting seats. A belt is fixedly installed at the output end of the steam turbine through one of the L-shaped mounting seats. A generator is fixedly installed at the top of the L-shaped mounting seat with the belt. The other end of the belt is connected to the output end of the generator. The dust removal mechanism includes..." The device includes a cathode plate, an anode plate, and a first water pipe. The cathode plate is fixedly installed at the bottom of the mounting plate. The anode plate is fixedly installed at the bottom of the interior of the device, corresponding to the position of the cathode plate. A siphon assembly is fixedly installed on one side of the anode plate. The output end of the siphon assembly passes through the bottom of the interior of the device. The input end of the first water pipe passes through the top of the device, corresponding to the position of the steam turbine. The output end of the first water pipe extends to the outside of the device and is fixedly connected to a condenser. The condenser is fixedly connected to the device. A second water pipe is fixedly installed at the bottom of the condenser. The output end of the second water pipe passes through the device and extends to the bottom of the mounting plate. An atomizing nozzle is fixedly connected to the output end of the second water pipe. The atomizing nozzle is installed at an angle.

[0004] However, in the process of implementing the relevant technologies, the above technical solutions have certain technical defects: among them, the above technical solutions adopt the common method of spray cooling, which consumes a lot of water and produces wastewater that is difficult to treat. Moreover, the waste heat of flue gas (usually 120–180℃) contains a large amount of recoverable energy. If it is not utilized, it will result in energy waste. In view of this, this utility model proposes a sulfur dioxide dust removal and cooling heat recovery tank. Utility Model Content

[0005] This invention proposes a sulfur dioxide dust removal and cooling heat recovery tank, which solves the problem of insufficient heat recovery from waste heat in flue gas in the prior art.

[0006] The technical solution of this utility model is as follows: A sulfur dioxide dust removal and cooling heat recovery tank includes a tank body. An inlet pipe for introducing sulfur dioxide is fixedly connected to one end of the top of the tank body. An outlet pipe is fixedly connected to the bottom of the tank body. A dust removal screen is fixedly connected to the top of the inner side of the tank body. A suction impeller is rotatably connected to the bottom of the dust removal screen. A motor is fixedly installed on the top of the tank body, and the output shaft of the motor is fixedly connected to the suction impeller. A heat recovery mechanism is provided at the bottom of the inner side of the tank body. The heat recovery mechanism includes two parallel partitions, both of which are fixedly connected to the inner side of the tank body. A plurality of arrayed heat exchange tubes are fixedly connected between the two partitions, and each heat exchange tube penetrates the two partitions. A cold water inlet pipe is fixedly connected to one side of the tank body, and a hot water outlet pipe is fixedly connected to the other side of the tank body. The cold water inlet pipe and the hot water outlet pipe are connected through the tank body. A guide mechanism is provided below the suction impeller to uniformly introduce sulfur dioxide into the plurality of heat exchange tubes by cooperating with the rotation of the suction impeller.

[0007] Preferably, a plurality of baffles are provided between the partitions, which are staggered in the vertical direction. The baffles are all fixedly connected to the inner side of the tank and form an S-shaped channel.

[0008] Preferably, the cold water inlet pipe is located above the hot water outlet pipe, the inlet end of the cold water inlet pipe is connected to a cold water supply device, and the outlet end of the hot water outlet pipe is connected to a hot water storage device.

[0009] Preferably, a plurality of legs are fixedly connected to the outer edge of the bottom of the tank, and the plurality of legs are distributed at equal angles around the tank.

[0010] Preferably, the air guiding mechanism includes a fixed frame fixedly connected to the inside of the tank body. A plurality of guide plates equidistantly distributed along the length of the fixed frame are rotatably connected to the inside of the fixed frame. A spur gear is fixedly connected to the inside of each of the guide plates. A slide rod penetrating the side wall of the tank body is slidably connected to one side of the tank body. A toothed plate is fixedly connected to one end of the slide rod. The spur gears mesh with the toothed plate. A linkage component is provided at the other end of the slide rod to drive the slide rod to slide back and forth by cooperating with the rotation of the suction impeller.

[0011] Preferably, all of the aforementioned guide plates are arc-shaped structures, and the diameter of the guide plate located at the center position to the end position of the fixing frame gradually decreases.

[0012] Preferably, a connecting plate is fixedly connected to one end of the toothed plate, and guide rods are fixedly connected to both ends of the bottom of the connecting plate. A sliding groove that fits with the two guide rods is provided at one end of the top of the fixing frame.

[0013] Preferably, the linkage includes a protective box fixedly connected to the outside of the tank body, a reciprocating screw rotatably connected to the inside of the protective box, a slider threaded onto the reciprocating screw, a movable rod fixedly connected to the bottom of the slider penetrating the bottom wall of the protective box, a guide groove with clearance fit to the movable rod on the bottom wall of the protective box, the bottom end of the movable rod fixedly connected to the slide rod, a bracket fixedly connected to the bottom of the inside of the tank body, a mounting box fixedly connected to the inside of the bracket, a first bevel gear fixedly connected to the inside of the mounting box and coaxially fixed to the suction impeller, a rotating shaft rotatably connected to the outside of the mounting box penetrating the side wall of the mounting box, a second bevel gear meshing with the first bevel gear fixedly connected to one end of the rotating shaft, and the other end of the rotating shaft fixedly connected to the end of the reciprocating screw.

[0014] The working principle and beneficial effects of this utility model are as follows:

[0015] 1. The S-shaped water flow channel formed by the densely arranged heat exchange tubes and baffles between parallel partitions significantly extends the contact time and path between cooling water and flue gas, realizing full recovery of flue gas waste heat, avoiding the high water consumption and wastewater treatment problems of traditional spraying methods, and reducing operating costs.

[0016] 2. The motor drives the suction impeller to rotate at high speed, forcing the flue gas through the dust collector screen, accelerating dust filtration and preventing the screen from clogging, thus improving dust removal efficiency.

[0017] 3. The air guide mechanism converts the impeller rotation into the reciprocating oscillation of the guide plate through the linkage. The diameter of the arc-shaped guide plate decreases from the center to both ends, ensuring that sulfur dioxide gas is evenly dispersed into all heat exchange tubes, avoiding local overheating or uneven heat exchange, and maximizing the utilization rate of the heat exchange area. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of a sulfur dioxide dust removal and cooling heat recovery tank according to the present invention;

[0020] Figure 2 This is a partial cross-sectional view of the present invention;

[0021] Figure 3 This is a schematic diagram of the heat recovery mechanism of this utility model;

[0022] Figure 4 This is a schematic diagram of the air guide mechanism of this utility model;

[0023] Figure 5 for Figure 4 An enlarged structural diagram of part A;

[0024] Figure 6 This is a schematic diagram of the linkage component of this utility model.

[0025] In the diagram: 1. Tank body; 2. Support leg; 3. Air inlet pipe; 4. Dust removal screen; 5. Suction impeller; 6. Air guide mechanism; 61. Fixing frame; 62. Guide plate; 63. Spur gear; 64. Sliding rod; 65. Gear plate; 66. Linkage component; 661. Protective box; 662. Reciprocating screw; 663. Sliding block; 664. Moving rod; 665. Guide groove; 666. Rotating shaft; 667. Bracket; 668. Mounting box; 669. First bevel gear; 660. Second bevel gear; 67. Connecting plate; 68. Guide rod; 69. Slide groove; 7. Heat recovery mechanism; 71. Baffle plate; 72. Heat exchange tube; 73. Cold water inlet pipe; 74. Hot water outlet pipe; 75. Baffle plate; 8. Air outlet pipe; 9. Motor. Detailed Implementation

[0026] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0027] Example 1, such as Figures 1-6As shown, a sulfur dioxide dust removal and cooling heat recovery tank includes a tank body 1. Several legs 2 are fixedly connected to the outer edge of the bottom of the tank body 1, and the legs 2 are distributed at equal angles around the tank body 1. An air inlet pipe 3 for introducing sulfur dioxide is fixedly connected to one end of the top of the tank body 1. An air outlet pipe 8 is fixedly connected to the bottom of the tank body 1. A dust removal screen 4 is fixedly connected to the top of the inner side of the tank body 1. A suction impeller 5 is rotatably connected to the bottom of the dust removal screen 4. A motor 9 is fixedly installed on the top of the tank body 1, and the output shaft of the motor 9 is fixedly connected to the suction impeller 5. A heat recovery mechanism 7 is provided at the bottom of the inner side of the tank body 1. The heat recovery mechanism 7 includes two parallel partitions 71. All are fixedly connected to the inside of the tank body 1. Several arrayed heat exchange tubes 72 are fixedly connected between the two partitions 71. Several heat exchange tubes 72 pass through the two partitions 71. A cold water inlet pipe 73 is fixedly connected to one side of the tank body 1, and a hot water outlet pipe 74 is fixedly connected to the other side of the tank body 1. The cold water inlet pipe 73 and the hot water outlet pipe 74 are connected through the tank body 1. The cold water inlet pipe 73 is located above the hot water outlet pipe 74. A cold water supply device is connected to the inlet end of the cold water inlet pipe 73, and a hot water storage device is connected to the outlet end of the hot water outlet pipe 74. A guide mechanism 6 is set below the suction impeller 5 to uniformly introduce sulfur dioxide into several heat exchange tubes 72 by cooperating with the rotation of the suction impeller 5.

[0028] Sulfur dioxide gas is introduced into the tank 1 through the air inlet pipe 3. The dust removal screen 4 can filter out the dust and impurities mixed in with the sulfur dioxide. At the same time, the motor 9 is started to drive the suction impeller 5 to rotate, which can speed up the flow of air through the air inlet pipe 3 to improve the dust removal efficiency.

[0029] During the rotation of the suction impeller 5 driven by the motor 9, the air guide mechanism 6, in conjunction with the rotation of the suction impeller 5, evenly introduces the sulfur dioxide after dust removal into several heat exchange tubes 72. At the same time, cooling water is introduced into the cold water inlet pipe 73 through the cold water supply equipment, so that the cooling water comes into contact with the heat exchange tubes 72 and exchanges heat evenly with the sulfur dioxide gas, thereby greatly improving the heat exchange efficiency and avoiding the high water consumption and wastewater treatment problems of traditional spraying methods, thus reducing operating costs.

[0030] Several baffles 75 are arranged between the baffles 71 in a staggered manner along the vertical direction. The baffles 75 are all fixedly connected to the inner side of the tank body 1 and form an S-shaped channel.

[0031] The design of the baffle 75 can change the flow trajectory of the cooling water, so that the cooling water flows along the S-shaped channel formed by several baffles 75. This can greatly extend the flow path of the cooling water, thereby extending the contact time between the cooling water and the heat exchange tube 72, and thus improving the heat exchange efficiency.

[0032] The air guiding mechanism 6 includes a fixed frame 61 fixedly connected to the inside of the tank body 1. Several guide plates 62 are rotatably connected to the inside of the fixed frame 61 and are equidistantly distributed along the length of the fixed frame 61. The guide plates 62 are all arc-shaped structures. The diameter of the guide plates 62 on the fixed frame 61 decreases gradually from the center to the end. Spur gears 63 are fixedly connected to the inside of each guide plate 62. A slide rod 64 is slidably connected to one side of the tank body 1 and passes through the side wall of the tank body 1. A toothed plate 65 is fixedly connected to one end of the slide rod 64. The spur gears 63 mesh with the toothed plate 65. The other end of the slide rod 64 is provided with a linkage 66 that drives the slide rod 64 to slide back and forth by cooperating with the rotation of the suction impeller 5.

[0033] The motor 9 drives the suction impeller 5 to rotate, which causes the linkage 66 to drive the slide bar 64 to slide back and forth, causing the toothed plate 65 to move back and forth. This causes all the spur gears 63 to rotate back and forth, and all the guide plates 62 to swing back and forth. As a result, the guide plates 62 evenly introduce sulfur dioxide into the interior of several heat exchange tubes 72, so that the sulfur dioxide is evenly distributed in the heat exchange tubes 72 and exchanges heat with the cooling water, which greatly improves the heat exchange efficiency.

[0034] A connecting plate 67 is fixedly connected to one end of the toothed plate 65. Guide rods 68 are fixedly connected to both ends of the bottom of the connecting plate 67. A sliding groove 69 is provided at one end of the top of the fixing frame 61, which is in clearance fit with the two guide rods 68.

[0035] The clearance fit design between the guide rod 68 and the slide groove 69 ensures that the supporting force at both ends of the toothed plate 65 is uniform, and that the toothed plate 65 remains stable during movement.

[0036] The linkage 66 includes a protective box 661 fixedly connected to the outside of the tank body 1. A reciprocating screw 662 is rotatably connected to the inside of the protective box 661. A slider 663 is threaded onto the reciprocating screw 662. A movable rod 664 penetrating the bottom wall of the protective box 661 is fixedly connected to the bottom of the slider 663. A guide groove 665 is provided on the bottom wall of the protective box 661, which is clearance-fitted with the movable rod 664. The bottom end of the movable rod 664 is fixedly connected to the slider 664. The bottom of the inside of the tank body 1... A bracket 667 is fixedly connected to the end of the mounting box 668, and a mounting box 668 is fixedly connected to the inner side of the mounting box 668. A first bevel gear 669, which is coaxially fixed to the suction impeller 5, is fixedly connected to the inner side of the mounting box 668. A rotating shaft 666, which passes through the side wall of the mounting box 668, is rotatably connected to the outer side of the mounting box 668. A second bevel gear 660, which meshes with the first bevel gear 669, is fixedly connected to one end of the rotating shaft 666, and the other end of the rotating shaft 666 is fixedly connected to the end of the reciprocating lead screw 662.

[0037] Working principle: First, sulfur dioxide gas is introduced into the tank 1 through the air inlet pipe 3. The dust removal screen 4 can filter out the dust and impurities mixed in with the sulfur dioxide. At the same time, the motor 9 is started to drive the suction impeller 5 to rotate, which can speed up the flow of air in the air inlet pipe 3 to improve the dust removal efficiency.

[0038] When the motor 9 drives the suction impeller 5 to rotate, the first bevel gear 669 rotates synchronously. Since the first bevel gear 669 meshes with the second bevel gear 660, the second bevel gear 660 rotates synchronously, causing the rotating shaft 664 to drive the reciprocating screw 662 to rotate synchronously. This causes the slider 663 to reciprocate along the axis of the reciprocating screw 662, causing the movable rod 664 to drive the sliding rod 64 to reciprocate synchronously, causing the toothed plate 65 to reciprocate. This causes all the spur gears 63 to rotate reciprocally, and all the guide plates 62 to swing reciprocally. As a result, the guide plates 62 uniformly introduce sulfur dioxide into the interior of several heat exchange tubes 72. At the same time, cooling water is introduced into the cold water inlet pipe 73 through the cold water supply equipment, so that the cooling water comes into contact with the heat exchange tubes 72 and exchanges heat with the sulfur dioxide gas uniformly, thereby greatly improving the heat exchange efficiency and realizing the utilization of sulfur dioxide preheating to save energy.

[0039] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A sulfur dioxide dust precipitation and temperature reduction heat recovery tank, characterized by, Include: Tank (1); Fixedly connected to the top of the tank (1) one end and for the import of sulfur dioxide inlet pipe (3); Fixedly connected to the bottom of the tank (1) outlet pipe (8); Fixedly connected to the inside of the tank (1) top end dust screen (4); Rotatably connected to the bottom of the dust screen (4) fan wheel (5); Fixedly installed in the top of the tank (1) motor (9), the output shaft of the motor (9) and fan wheel (5) fixedly connected; Provided in the inside of the tank (1) bottom end heat recovery mechanism (7), the heat recovery mechanism (7) includes two parallelly arranged baffle (71), two baffle (71) are fixedly connected to the inside of the tank (1), two baffle (71) are fixedly connected with a plurality of array distribution heat exchange tube (72), a plurality of heat exchange tube (72) are all through two baffle (71), one side of the tank (1) is fixedly connected with cold water inlet pipe (73), the other side of the tank (1) is fixedly connected with hot water outlet pipe (74), the cold water inlet pipe (73) and hot water outlet pipe (74) are communicated through the tank (1); Provided below the fan wheel (5) and by cooperating with the rotation of the fan wheel (5) to guide the sulfur dioxide evenly into a plurality of heat exchange tube (72) air guide mechanism (6).

2. A sulfur dioxide dust precipitation and temperature reduction heat recovery tank according to claim 1, characterized in that, The baffle (71) is provided with a plurality of vertical direction staggered distribution baffle (75), a plurality of baffle (75) are fixedly connected to the inside of the tank (1) and a plurality of baffle (75) form an S type channel.

3. A sulfur dioxide dust precipitation and temperature reduction heat recovery tank according to claim 2, characterized in that, The cold water inlet pipe (73) is located above the hot water outlet pipe (74), the inlet end of the cold water inlet pipe (73) is connected with a cold water supply device, and the outlet end of the hot water outlet pipe (74) is connected with a hot water storage device.

4. A sulfur dioxide dust precipitation and temperature reduction heat recovery tank according to claim 1, characterized in that, The outer edge of the bottom of the tank (1) is fixedly connected with a plurality of supporting legs (2), and a plurality of supporting legs (2) are distributed at equal angles around the tank (1).

5. A sulfur dioxide dust precipitation and temperature reduction heat recovery tank according to claim 1, characterized in that, The air guide mechanism (6) includes a fixed frame (61) fixedly connected to the inside of the tank (1), a plurality of guide plates (62) rotatably connected to the inside of the fixed frame (61) and equidistantly distributed along the length direction of the fixed frame (61), a plurality of straight gears (63) fixedly connected to the inside of the guide plates (62), a slide rod (64) slidably connected to one side of the tank (1) and penetrating the side wall of the tank (1), a toothed plate (65) fixedly connected to one end of the slide rod (64), a plurality of straight gears (63) meshing with the toothed plate (65), and a linkage (66) provided at the other end of the slide rod (64) and driven by the rotation of the fan wheel (5) to reciprocatingly slide the slide rod (64).

6. A sulfur dioxide dust precipitation and temperature reduction heat recovery tank according to claim 5, characterized in that, A plurality of guide plates (62) are arc-shaped structures, and the diameters of the guide plates (62) gradually decrease from the center to the ends of the fixed frame (61).

7. A sulfur dioxide dust precipitation and temperature reduction heat recovery tank according to claim 5, characterized in that, One end of the toothed plate (65) is fixedly connected with a connecting plate (67), both ends of the bottom of the connecting plate (67) are fixedly connected with guide rods (68), one end of the top of the fixing frame (61) is provided with a sliding groove (69) matched with the two guide rods (68), a protection box (661), a reciprocating screw rod (662), a sliding block (663), a movable rod (664), a guide groove (665), a rotating shaft (666), a support (667), a mounting box (668), a first bevel gear (669) and a second bevel gear (660).

8. A sulfur dioxide dust precipitation and temperature reduction heat recovery tank according to claim 5, characterized in that, The linkage (66) comprises a protection box (661) fixedly connected to the outside of the tank body (1), a reciprocating screw rod (662) rotatably connected to the inside of the protection box (661), a sliding block (663) threadedly connected to the reciprocating screw rod (662), a movable rod (664) fixedly connected to the bottom of the sliding block (663) and penetrating through the bottom wall of the protection box (661), a guide groove (665) provided in the bottom wall of the protection box (661) and matched with the movable rod (664), a bottom end of the movable rod (664) fixedly connected with the sliding rod (64), a support (667) fixedly connected to the bottom end of the inside of the tank body (1), a mounting box (668) fixedly connected to the inside of the support (667), a first bevel gear (669) fixedly connected to the inside of the mounting box (668) and coaxial with the air suction impeller (5), a rotating shaft (666) rotatably connected to the outside of the mounting box (668) and penetrating through the side wall of the mounting box (668), a second bevel gear (660) fixedly connected to one end of the rotating shaft (666) and meshed with the first bevel gear (669), and the other end of the rotating shaft (666) fixedly connected with the end of the reciprocating screw rod (662).

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