CN215327028U - Waste water energy-saving COD (chemical oxygen demand) reducing device of catalytic flue gas desulfurization tower - Google Patents

Abstract

The utility model belongs to the technical field of comprehensive utilization of materials and energy consumption in the petrochemical industry, and particularly relates to a waste water energy-saving and COD (chemical oxygen demand) reducing device for a catalytic flue gas desulfurization tower. The utility model has simple operation and convenient use, can increase the air pressure, and can stir the bubbles in the desulfurizing tower through the arrangement of the mixing and stirring mechanism, thereby leading the reaction to be more sufficient.

Description

Waste water energy-saving COD (chemical oxygen demand) reducing device of catalytic flue gas desulfurization tower

Technical Field

The utility model relates to the technical field of comprehensive utilization of materials and energy consumption in the petrochemical industry, in particular to an energy-saving COD (chemical oxygen demand) reducing device for wastewater of a catalytic flue gas desulfurization tower.

Background

At present, the flue gas that catalytic cracking unit discharged in the petrochemical industry will SOx/NOx control discharge to reach standard, and the waste water COD that produces also needs discharge to reach standard, but discharges environmental protection index and constantly improves, and the requirement is more and more strict, and the technology that reduces waste water COD also needs to improve to can satisfy the emission requirement that constantly improves. The COD reducing process is completed through mixing oxygen and desulfurized waste water. The oxygen for reducing COD is replaced by non-purified wind (namely compressed air) with high cost by adopting ozone, and then is injected into the bottom of the aeration tank, and is mixed with the flue gas desulfurization wastewater in the aeration tank by the distributor, and the oxygen and oxidizable substances in the oxygen are fully mixed and oxidized.

The existing non-purified air has high cost, the flue gas desulfurization wastewater in the aeration tank basically does not flow, the injected non-purified air forms a big air pocket which directly floats upwards, the contact surface with the flue gas desulfurization wastewater is limited, the oxidation reaction is stopped after the air pocket leaves the liquid surface, and a large amount of oxygen is wasted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects that the cost of the existing non-purified air is high, the flue gas desulfurization wastewater in an aeration tank basically does not flow, the injected non-purified air forms a large air pocket which directly floats upwards, the contact surface with the flue gas desulfurization wastewater is limited, the oxidation reaction is stopped after the injected non-purified air leaves the liquid surface, and a large amount of oxygen is wasted.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a catalytic flue gas desulfurization tower waste water energy-saving COD-reducing device comprises a regulating valve group, a check valve, a flowmeter, a liquid level meter, a backwater buffer tank, a backwater-preventing pipe, a quick cut-off valve, a circular distributor and a desulfurization tower, the circular distributor is arranged on the desulfurizing tower, the desulfurizing tower is connected with a water return prevention pipe, the quick cut-off valve is arranged on the water return prevention pipe, the water return prevention pipe is connected with a water return buffer tank, a liquid level meter is arranged on the water return buffer tank, the return water buffer tank is connected with a main fan air outlet, the regulating valve group, the check valve and the flowmeter are arranged on the main fan air outlet, the top of the desulfurizing tower is provided with a motor, an output shaft of the motor is fixedly provided with a rotating rod, the rotating rod is provided with a stirring and mixing mechanism, the bottom fixed mounting of desulfurizing tower has the box of admitting air, and the intake pipe is installed to one side of the box of admitting air, be equipped with air intake mechanism on the box of admitting air.

Preferably, the stirring and mixing mechanism comprises stirring rods, rotating rollers, a moving pipe, moving rings, fixing rods and a screen, wherein the stirring rods are fixedly arranged on the rotating rods, the rotating rollers are fixedly arranged on the rotating rods, the moving pipe is movably sleeved on the rotating rollers, the moving rings are slidably arranged on the inner wall of the desulfurization tower, the fixing rods are fixedly arranged on the moving pipe, the fixing rods are fixedly connected with the moving rings, the inner wall of the moving pipe is fixedly provided with a positioning block, the rotating rollers are provided with circulating grooves which are slidably connected with the positioning block, the inner walls at two sides of the desulfurization tower are respectively provided with a plurality of limiting grooves, the limiting grooves are slidably connected with limiting blocks, the limiting blocks are fixedly connected with corresponding moving rings, the rotating rods drive the rotating rollers to rotate, the rotating rollers drive the moving pipe to move up and down through the sliding connection of the circulating grooves and the positioning block, the moving pipe drives the screen and the moving rings to mix and stir the liquid in the desulfurization tower through the fixing rods, so that the bubbles in the desulfurizing tower can be fully mixed with the liquid.

Preferably, air inlet mechanism includes the rotor plate, helical blade and location axle, the rotor plate rotates and installs on the bull stick, equal fixed mounting has two helical blade on rotor plate and the bull stick, helical blade mutually supports with the inner wall of box of admitting air, the location rotation of axes is installed on the inner wall of box of admitting air, equal fixed mounting has second conical gear on rotor plate and the bull stick, the one end fixed mounting of location axle has first conical gear, first conical gear and two second conical gear intermeshing, pivoted bull stick can be through the intermeshing of first conical gear and two second conical gear, thereby drive two helical blade and carry out the antiport, and then carry out air extrusion in to the desulfurizing tower through the box of admitting air.

Compared with the prior art, the utility model has the advantages that:

(1) according to the scheme, due to the arrangement of the stirring rod and the sliding connection of the circulating groove and the positioning block, the rotating rod can drive the stirring rod to rotate, and meanwhile, bubbles in the desulfurizing tower are stirred through the screen, so that the bubbles and liquid can be fully mixed;

(2) because the first bevel gear and the two second bevel gears are meshed with each other, the rotating rod can drive the two spiral blades to rotate reversely, and air extrusion is carried out in the desulfurizing tower through the air inlet box.

The utility model has simple operation and convenient use, can increase the air pressure, and can stir the bubbles in the desulfurizing tower through the arrangement of the mixing and stirring mechanism, thereby leading the reaction to be more sufficient.

Drawings

FIG. 1 is a schematic view of an air inlet structure of a catalytic flue gas desulfurization tower waste water energy-saving COD reducing device provided by the utility model;

FIG. 2 is a schematic structural diagram of a desulfurizing tower of the catalytic flue gas desulfurization tower waste water energy-saving COD reducing device provided by the utility model;

FIG. 3 is a schematic view of a three-dimensional structure of a filter cartridge of the waste water energy-saving COD-reducing device of the catalytic flue gas desulfurization tower provided by the utility model;

FIG. 4 is a schematic cross-sectional view of a moving ring and a moving pipe of the waste water energy-saving COD reducing device of the catalytic flue gas desulfurization tower provided by the utility model;

FIG. 5 is a schematic structural diagram of part A of the catalytic flue gas desulfurization tower wastewater energy-saving COD-reducing device provided by the utility model.

In the figure: 1. a desulfurizing tower; 2. a motor; 3. a rotating rod; 4. positioning a plate; 5. rotating the roller; 6. a moving ring; 7. fixing the rod; 8. moving the tube; 9. screening a screen; 10. a circulation tank; 11. positioning blocks; 12. a stirring rod; 13. an air intake box; 14. rotating the plate; 15. a helical blade; 16. positioning the shaft; 17. a first bevel gear; 18. a second bevel gear; 19. an air inlet pipe; 20. a kit; 21. a through hole; 22. a filter box; 23. closing the plate; 24. an air inlet; 25. a driving gear; 26. a driven gear; 27. an adjusting valve group; 28. a check valve; 29. a flow meter; 30. a liquid level meter; 31. a backwater buffer tank; 32. a water return prevention pipe; 33. a quick cut-off valve; 34. a circular distributor.

Detailed Description

The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments, but not all embodiments.

Example one

Referring to fig. 1-4, a catalytic flue gas desulfurization tower waste water energy-saving and COD-reducing device comprises a regulating valve group 27, a check valve 28, a flowmeter 29, a liquid level meter 30, a backwater buffer tank 31, a water return preventing pipe 32, a quick cut-off valve 33, a circular distributor 34 and a desulfurization tower 1, wherein the circular distributor 34 is installed on the desulfurization tower 1, the desulfurization tower 1 is connected with the water return preventing pipe 32, the quick cut-off valve 33 is arranged on the water return preventing pipe 32, the water return preventing pipe 32 is connected with the backwater buffer tank 31, the backwater buffer tank 31 is provided with the liquid level meter 30, the backwater buffer tank 31 is connected with a main fan air outlet, the regulating valve group 27, the check valve 28 and the flowmeter 29 are arranged on the main fan air outlet, the top of the desulfurization tower 1 is provided with a motor 2, a rotating rod 3 is fixedly installed on an output shaft of the motor 2, a stirring and mixing mechanism is arranged on the rotating rod 3, an air inlet box 13 is fixedly installed at the bottom of the desulfurization tower 1, an air inlet pipe 19 is installed on one side of the air inlet box 13, and an air inlet mechanism is arranged on the air inlet box 13.

In the embodiment, the stirring and mixing mechanism comprises stirring rods 12, rotating rollers 5, a moving pipe 8, moving rings 6, fixed rods 7 and a screen 9, wherein a plurality of stirring rods 12 are fixedly arranged on the rotating rods 3, a plurality of rotating rollers 5 are fixedly arranged on the rotating rods 3, the moving pipe 8 is movably sleeved on the rotating rollers 5, a plurality of moving rings 6 are slidably arranged on the inner wall of the desulfurizing tower 1, a plurality of fixed rods 7 are fixedly arranged on the moving pipes 8, the fixed rods 7 are fixedly connected with the moving rings 6, positioning blocks 11 are fixedly arranged on the inner wall of the moving pipe 8, circulating grooves 10 are formed in the rotating rollers 5, the circulating grooves 10 are slidably connected with the positioning blocks 11, a plurality of limiting grooves are formed in the inner walls on two sides of the desulfurizing tower 1, limiting blocks are slidably connected with the limiting grooves and fixedly connected with the corresponding moving rings 6, the rotating rods 3 drive the rotating rollers 5 to rotate, the rotating rollers 5 drive the moving pipe 8 to move up and down through the sliding connection of the circulating grooves 10 and the positioning blocks 11, the movable pipe 8 drives the screen 9 and the movable ring 6 to mix and stir the liquid in the desulfurizing tower 1 through the fixed rod 7, so that bubbles in the desulfurizing tower 1 can be fully mixed with the liquid.

In this embodiment, the mechanism of admitting air includes rotor plate 14, helical blade 15 and location axle 16, rotor plate 14 rotates and installs on bull stick 3, equal fixed mounting has two helical blade 15 on rotor plate 14 and the bull stick 3, helical blade 15 mutually supports with the inner wall of the box 13 that admits air, location axle 16 rotates and installs on the inner wall of the box 13 that admits air, equal fixed mounting has second bevel gear 18 on rotor plate 14 and the bull stick 3, the one end fixed mounting of location axle 16 has first bevel gear 17, first bevel gear 17 and two second bevel gear 18 intermeshing, pivoted bull stick 3 can be through the intermeshing of first bevel gear 17 with two second bevel gear 18, thereby drive two helical blade 15 and carry out the counter-rotation, and then carry out the air extrusion in to desulfurizing tower 1 through the box 13 that admits air.

The theory of operation, in operation, the starter motor 2 switch, the output shaft of motor 2 drives bull stick 3 and rotates, bull stick 3 is through the intermeshing of first bevel gear 17 and two second bevel gear 18, thereby drive two helical blade 15 antiport, pivoted helical blade 15 is through mutually supporting with box 13 admits air, thereby it blows to the desulfurizing tower 1 in through box 13 admits air, and increase desulfurizing tower 1 internal gas pressure, pivoted bull stick 3 drives stirring rod 12 and rotates simultaneously, bull stick 3 drives the commentaries on classics roller 5 and rotates, commentaries on classics roller 5 drives removal pipe 8 through the sliding connection of circulation groove 10 with locating piece 11 and reciprocates, removal pipe 8 drives removal ring 6 through dead lever 7 and reciprocates, and mix the stirring through the bubble of screen cloth 9 in to desulfurizing tower 1 liquid, make it can be more abundant react between bubble and the liquid.

Example two

Referring to fig. 1-4, a catalytic flue gas desulfurization tower waste water energy-saving and COD-reducing device comprises a regulating valve group 27, a check valve 28, a flowmeter 29, a liquid level meter 30, a backwater buffer tank 31, a water return preventing pipe 32, a quick cut-off valve 33, a circular distributor 34 and a desulfurization tower 1, wherein the circular distributor 34 is installed on the desulfurization tower 1, the desulfurization tower 1 is connected with the water return preventing pipe 32, the quick cut-off valve 33 is arranged on the water return preventing pipe 32, the water return preventing pipe 32 is connected with the backwater buffer tank 31, the backwater buffer tank 31 is provided with the liquid level meter 30, the backwater buffer tank 31 is connected with a main fan air outlet, the regulating valve group 27, the check valve 28 and the flowmeter 29 are arranged on the main fan air outlet, the top of the desulfurization tower 1 is provided with a motor 2, a rotating rod 3 is fixedly installed on an output shaft of the motor 2, a stirring and mixing mechanism is arranged on the rotating rod 3, an air inlet box 13 is fixedly installed at the bottom of the desulfurization tower 1, intake pipe 19 is installed to one side of box 13 of admitting air, be equipped with air inlet mechanism on the box 13 of admitting air, fixed mounting has locating plate 4 on the inner wall of desulfurizing tower 1, the cover box 20 that two symmetries set up is installed in the rotation of top of locating plate 4, the top sliding connection of desulfurizing tower 1 has the rose box 22 that two symmetries set up, the top fixed mounting of rose box 22 has shrouding 23, the bottom fixed mounting of cover box 20 has the connecting axle, fixed mounting has driving gear 25 on the bull stick 3, the bottom fixed mounting of connecting axle has driven gear 26, driving gear 25 and two driven gear 26 intermeshing, set up the through-hole 21 that two symmetries set up on the cover box 20, inlet port 24 has all been seted up to the both sides of rose box 22, through-hole 21 and inlet port 24 mutually support.

In the embodiment, the stirring and mixing mechanism comprises stirring rods 12, rotating rollers 5, a moving pipe 8, moving rings 6, fixed rods 7 and a screen 9, wherein a plurality of stirring rods 12 are fixedly arranged on the rotating rods 3, a plurality of rotating rollers 5 are fixedly arranged on the rotating rods 3, the moving pipe 8 is movably sleeved on the rotating rollers 5, a plurality of moving rings 6 are slidably arranged on the inner wall of the desulfurizing tower 1, a plurality of fixed rods 7 are fixedly arranged on the moving pipes 8, the fixed rods 7 are fixedly connected with the moving rings 6, positioning blocks 11 are fixedly arranged on the inner wall of the moving pipe 8, circulating grooves 10 are formed in the rotating rollers 5, the circulating grooves 10 are slidably connected with the positioning blocks 11, a plurality of limiting grooves are formed in the inner walls on two sides of the desulfurizing tower 1, limiting blocks are slidably connected with the limiting grooves and fixedly connected with the corresponding moving rings 6, the rotating rods 3 drive the rotating rollers 5 to rotate, the rotating rollers 5 drive the moving pipe 8 to move up and down through the sliding connection of the circulating grooves 10 and the positioning blocks 11, the movable pipe 8 drives the screen 9 and the movable ring 6 to mix and stir the liquid in the desulfurizing tower 1 through the fixed rod 7, so that bubbles in the desulfurizing tower 1 can be fully mixed with the liquid.

In this embodiment, the mechanism of admitting air includes rotor plate 14, helical blade 15 and location axle 16, rotor plate 14 rotates and installs on bull stick 3, equal fixed mounting has two helical blade 15 on rotor plate 14 and the bull stick 3, helical blade 15 mutually supports with the inner wall of the box 13 that admits air, location axle 16 rotates and installs on the inner wall of the box 13 that admits air, equal fixed mounting has second bevel gear 18 on rotor plate 14 and the bull stick 3, the one end fixed mounting of location axle 16 has first bevel gear 17, first bevel gear 17 and two second bevel gear 18 intermeshing, pivoted bull stick 3 can be through the intermeshing of first bevel gear 17 with two second bevel gear 18, thereby drive two helical blade 15 and carry out the counter-rotation, and then carry out the air extrusion in to desulfurizing tower 1 through the box 13 that admits air.

The difference between the second embodiment and the first embodiment lies in that the rotating rod 3 drives the sleeve box 20 to rotate through the mutual engagement of the driving gear 25 and the two driven gears 26, the rotating sleeve box 20 is matched with the air inlet holes 24 through the through holes 21, and the gas in the desulfurizing tower 1 is intermittently discharged through the filter box 22, so that the air pressure in the desulfurizing tower 1 is ensured, and the discharged gas is filtered and adsorbed, thereby being convenient for people to use.

The above descriptions are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the scope of the present invention, and the technical solutions and the utility model concepts of the present invention are equivalent to, replaced or changed.

Claims (5)

1. The utility model provides a COD device falls in energy-conservation of catalysis flue gas desulfurization tower waste water, includes adjusting valve group (27), check valve (28), flowmeter (29), level gauge (30), return water buffer tank (31), prevents wet return (32), quick cutoff valve (33), circular distributor (34), desulfurizing tower (1), its characterized in that, circular distributor (34) are installed on desulfurizing tower (1), and desulfurizing tower (1) is connected with preventing wet return (32), and quick cutoff valve (33) set up on preventing wet return (32), prevents that wet return (32) and return water buffer tank (31) are connected, is equipped with level gauge (30) on return water buffer tank (31), be connected with the main air fan air outlet on return water buffer tank (31), adjusting valve group (27), check valve (28), flowmeter (29) set up on the main air fan air outlet, motor (2) are installed at the top of desulfurizing tower (1), fixed mounting has bull stick (3) on the output shaft of motor (2), be equipped with stirring mixing mechanism on bull stick (3), the bottom fixed mounting of desulfurizing tower (1) has box (13) of admitting air, and intake pipe (19) are installed to one side of box (13) of admitting air, be equipped with air inlet mechanism on box (13) of admitting air.

2. The energy-saving and COD-reducing device for the wastewater of the catalytic flue gas desulfurization tower according to claim 1, wherein the stirring and mixing mechanism comprises stirring rods (12), rotating rollers (5), a moving pipe (8), a moving ring (6), a fixed rod (7) and a screen (9), the stirring rods (12) are fixedly arranged on the rotating rods (3), the rotating rollers (5) are fixedly arranged on the rotating rods (3), the moving pipe (8) is movably sleeved on the rotating rollers (5), the moving rings (6) are slidably arranged on the inner wall of the desulfurization tower (1), the fixed rods (7) are fixedly arranged on the moving pipe (8), and the fixed rod (7) is fixedly connected with the moving rings (6).

3. The energy-saving COD (chemical oxygen demand) reducing device for the wastewater of the catalytic flue gas desulfurization tower according to claim 1, wherein the air inlet mechanism comprises a rotating plate (14), helical blades (15) and a positioning shaft (16), the rotating plate (14) is rotatably installed on the rotating rod (3), the rotating plate (14) and the rotating rod (3) are both fixedly provided with two helical blades (15), the helical blades (15) are matched with the inner wall of the air inlet box (13), the positioning shaft (16) is rotatably installed on the inner wall of the air inlet box (13), the rotating plate (14) and the rotating rod (3) are both fixedly provided with second bevel gears (18), one end of the positioning shaft (16) is fixedly provided with a first bevel gear (17), and the first bevel gear (17) is meshed with the two second bevel gears (18).

4. The energy-saving and COD-reducing device for the wastewater of the catalytic flue gas desulfurization tower according to claim 2, wherein a positioning block (11) is fixedly installed on the inner wall of the moving pipe (8), a circulating groove (10) is formed in the rotating roller (5), and the circulating groove (10) is slidably connected with the positioning block (11).

5. The energy-saving and COD-reducing device for the wastewater of the catalytic flue gas desulfurization tower according to claim 2, wherein a plurality of limiting grooves are formed in the inner walls of the two sides of the desulfurization tower (1), limiting blocks are slidably connected in the limiting grooves, and the limiting blocks are fixedly connected with the corresponding moving rings (6).

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