A flue gas de-whitening device

Abstract

This invention discloses a flue gas whitening device, comprising: a dust removal mechanism, an induced draft fan, and a whitening mechanism arranged sequentially along the flue gas flow direction; wherein, the whitening mechanism includes a frame, a cylinder horizontally arranged on the frame, a rotating shaft coaxially arranged inside the inner cylinder, helical blades spirally wound around the rotating shaft, and a drive assembly for driving the rotating shaft to rotate; the top of the peripheral wall of the cylinder has a plurality of first liquid inlets spaced apart and evenly arranged along the axial direction of the cylinder, and each first liquid inlet is equipped with an atomizing nozzle; the bottom of the end cap at the first end of the cylinder has an air inlet, the top of the end cap at the second end of the cylinder has an air outlet, and the bottom of the end cap at the second end of the cylinder has a first liquid outlet; the two ends of the rotating shaft pass through the end caps at both ends of the cylinder and extend out of the inner cylinder, and the rotating shaft is rotatably and sealingly connected to the end caps; the outer helix of the helical blades slides and seals against the inner surface of the peripheral wall of the cylinder. This invention improves the whitening effect.

Description

Technical Field

[0001] This invention relates to the field of flue gas whitening technology, and more particularly to a flue gas whitening device. Background Technology

[0002] In flue gas emission treatment, wet desulfurization is mostly used. The flue gas after wet desulfurization is at 45-55℃, and water vapor is saturated. If the flue gas after wet desulfurization is directly discharged into the atmosphere, the water vapor in the flue gas, being supersaturated, will condense and precipitate, forming "white smoke." However, white smoke still contains sulfides, nitrogen oxides, and some salts, and cannot be directly emitted. To remove the white smoke, some manufacturers use heat exchangers to condense the flue gas, but the heat exchanger's heat exchange efficiency is poor, resulting in poor white smoke removal. Summary of the Invention

[0003] To address the technical problems existing in the background art, the present invention proposes a flue gas whitening device.

[0004] The present invention proposes a flue gas whitening device, comprising: a dust removal mechanism, an induced draft fan, and a whitening mechanism arranged sequentially along the flue gas flow direction;

[0005] The whitening mechanism includes a frame, cylinder, rotating shaft, spiral blades, and drive assembly;

[0006] The cylinder is horizontally arranged on the frame. The top of the cylinder's peripheral wall has multiple first liquid inlets spaced apart and evenly arranged along the cylinder's axial direction. Each first liquid inlet is equipped with an atomizing nozzle. The bottom of the end cap at the first end of the cylinder has an air inlet, the top of the end cap at the second end of the cylinder has an air outlet, and the bottom of the end cap at the second end of the cylinder has a first liquid outlet.

[0007] The rotating shaft is coaxially installed inside the inner cylinder. The two ends of the rotating shaft pass through the end caps of the first and second ends of the cylinder and extend out of the inner cylinder. The rotating shaft is rotatably and sealingly connected to the end caps of the cylinder.

[0008] The spiral blades are spirally wound around the shaft located inside the cylinder along the axial direction of the shaft, and the outer spiral line of the spiral blades slides and seals against the inner side of the cylinder's peripheral wall.

[0009] The drive assembly is connected to the shaft and is used to drive the shaft to rotate.

[0010] Preferably, the spiral blade has a hollow structure inside, and a second liquid inlet is provided at the first or second end of the rotating shaft, which communicates with the hollow structure of the spiral blade. The second liquid inlet extends from the first or second end of the rotating shaft to the hollow structure of the spiral blade. A second liquid outlet is provided at the second or first end of the rotating shaft, which communicates with the hollow structure of the spiral blade. The second liquid outlet extends from the second or first end of the rotating shaft to the hollow structure of the spiral blade.

[0011] Preferably, it further includes a refrigeration mechanism and a pump body, wherein the second liquid outlet is connected to the liquid inlet of the refrigeration mechanism, the liquid outlet of the refrigeration mechanism is connected to the liquid inlet of the pump body, and the liquid outlet of the pump body is connected to the second liquid inlet.

[0012] Preferably, the helical blades are divided into one circle for every 100 degrees of rotation, and multiple grid plates are connected between each circle of helical blades and the adjacent circles of helical blades. The multiple grid plates are spaced apart and evenly arranged along the rotation direction of the corresponding circles of helical blades.

[0013] Preferably, the grating is wavy.

[0014] Preferably, the drive mechanism includes a first gear, a second gear, and a motor; the motor is arranged on a frame located on the outer side of the first end of the cylinder, the second gear is coaxially fixed on the output shaft of the motor, the first gear is coaxially fixed on a rotating shaft located on the outer side of the first end of the cylinder, and the first gear and the second gear are meshed together.

[0015] The flue gas de-whitening device proposed in this invention can effectively increase the contact area and contact time between the coolant and the flue gas, accelerate the condensation and precipitation of water vapor and soluble salts, and improve the de-whitening effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the flue gas whitening device in one embodiment of the present invention. Detailed Implementation

[0017] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0018] Reference Figure 1 The present invention proposes a flue gas whitening device, comprising: a dust removal mechanism, an induced draft fan and a whitening mechanism arranged sequentially along the flue gas flow direction;

[0019] The whitening mechanism includes a frame, a cylinder 2, a rotating shaft 1, spiral blades 3, and a drive assembly;

[0020] The cylinder 2 is horizontally arranged on the frame. The top of the peripheral wall of the cylinder 2 is provided with a plurality of first liquid inlets 201 that are spaced apart and evenly arranged along the axial direction of the cylinder 2. Each first liquid inlet 201 is equipped with an atomizing nozzle. The bottom of the end cap at the first end of the cylinder 2 is provided with an air inlet 204, the top of the end cap at the second end of the cylinder 2 is provided with an air outlet 202, and the bottom of the end cap at the second end of the cylinder 2 is provided with a first liquid outlet 203.

[0021] The rotating shaft 1 is coaxially installed inside the inner cylinder. The two ends of the rotating shaft 1 pass through the end caps of the first and second ends of the cylinder 2 and extend out of the inner cylinder. The rotating shaft 1 is rotatably and sealingly connected to the end caps of the cylinder 2.

[0022] The spiral blade 3 is spirally wound around the rotating shaft 1 along the axial direction of the rotating shaft 1 on the rotating shaft 1 located inside the cylinder 2, and the outer spiral line of the spiral blade 3 is in sliding sealing contact with the inner side of the peripheral wall of the cylinder 2.

[0023] The drive assembly is connected to the rotating shaft 1 and is used to drive the rotating shaft 1 to rotate.

[0024] In a specific implementation of this invention, after the flue gas is removed by the dust removal mechanism, it enters the cylinder 2 through the inlet under the action of the induced draft fan. The flue gas moves from the first end of the cylinder 2 to the second end of the cylinder 2 under the push of the spiral blades 3 and exits from the outlet. During the movement of the flue gas, the coolant enters from multiple first inlets 201 and is atomized into coolant particles by the atomizing nozzles and sprayed into the cylinder 2. The coolant particles collide and contact with the moving flue gas. When the water vapor in the flue gas condenses and precipitates, it merges with the coolant particles to form large water mist particles. The large water mist particles fall to the bottom of the peripheral wall of the cylinder 2 under the action of gravity and condense into liquid. Then, the liquid rotates and rises to a certain height under the action of the spiral blades 3 and falls again. During the flow, the liquid contacts the flowing flue gas, thereby cooling the flue gas again. Finally, the liquid exits from the first outlet 203.

[0025] This invention can effectively increase the contact area and contact time between coolant and flue gas, accelerate the condensation and precipitation of water vapor and soluble salts, and improve the whitening effect.

[0026] In this embodiment, the spiral blade 3 has a hollow structure inside. The first or second end of the rotating shaft 1 is provided with a second liquid inlet that communicates with the hollow structure of the spiral blade 3. The second liquid inlet extends from the first or second end of the rotating shaft 1 to the hollow structure of the spiral blade 3. The second or first end of the rotating shaft 1 is provided with a second liquid outlet that communicates with the hollow structure of the spiral blade 3. The second liquid outlet extends from the second or first end of the rotating shaft 1 to the hollow structure of the spiral blade 3.

[0027] With this configuration, the second liquid inlet, the hollow structure of the spiral blade 3, and the second liquid outlet are connected to form a coolant channel. The coolant flowing in the cooling channel can further cool the flue gas located in the cylinder 2, accelerating the condensation and precipitation of water vapor in the flue gas on the spiral blade 3.

[0028] In this embodiment, the spiral blade 3 is divided into a circle every 360° of rotation. Each circle of spiral blade 3 is connected to the spiral blade 3 of the adjacent circle with multiple grid plates 4. The multiple grid plates 4 are spaced apart and evenly arranged along the rotation direction of the corresponding circle of spiral blade 3.

[0029] With this configuration, the sprayed coolant can collide with the grille plate 4 and be atomized into small water droplets again, increasing the contact area between the flue gas and the coolant.

[0030] In a further embodiment, the grille 4 is wavy to further increase the contact area between the flue gas and the coolant.

[0031] In a further embodiment, the grille plate 4 extends in a wavy shape in the axial direction of the rotating shaft 1.

[0032] In this embodiment, the drive mechanism includes a first gear 5, a second gear 6, and a motor 7. The motor 7 is mounted on a frame located on the outer side of the first end of the cylinder 2. The second gear 6 is coaxially fixed to the output shaft of the motor 7, and the first gear 5 is coaxially fixed to a rotating shaft 1 located on the outer side of the first end of the cylinder 2. The first gear 5 and the second gear 6 are meshed together. When the motor 7 rotates, it drives the second gear 6 to rotate. The rotation of the second gear 6 drives the first gear 5 to rotate, thereby driving the rotating shaft 1 to rotate.

[0033] In this embodiment, a refrigeration mechanism and a pump body are also included. The second liquid outlet is connected to the liquid inlet of the refrigeration mechanism, the liquid outlet of the refrigeration mechanism is connected to the liquid inlet of the pump body, and the liquid outlet of the pump body is connected to the second liquid inlet.

[0034] This design allows the coolant used in the coolant flow channels to circulate, saving coolant.

[0035] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A flue gas de-whitening device, characterized in that, include: The dust removal mechanism, induced draft fan, refrigeration mechanism, pump body, and whitening mechanism are arranged sequentially along the flue gas flow direction. The whitening mechanism includes a frame, a cylinder (2), a rotating shaft (1), spiral blades (3), and a drive assembly; The cylinder (2) is horizontally arranged on the frame. The top of the peripheral wall of the cylinder (2) is provided with a plurality of first liquid inlets (201) spaced apart and evenly arranged along the axial direction of the cylinder (2). Each first liquid inlet (201) is equipped with an atomizing nozzle. The bottom of the end cap at the first end of the cylinder (2) is provided with an air inlet (204). The top of the end cap at the second end of the cylinder (2) is provided with an air outlet (202). The bottom of the end cap at the second end of the cylinder (2) is provided with a first liquid outlet (203). The rotating shaft (1) is coaxially installed inside the inner cylinder. The two ends of the rotating shaft (1) pass through the end caps of the first and second ends of the cylinder (2) and extend out of the inner cylinder. The rotating shaft (1) is rotatably and sealed to the end caps. The spiral blade (3) is spirally wound around the rotating shaft (1) along the axial direction of the rotating shaft (1) located inside the cylinder (2), and the outer spiral line of the spiral blade (3) slides and seals against the inner side of the circumferential wall of the cylinder (2); the spiral blade (3) has a hollow structure inside, and the first or second end of the rotating shaft (1) is provided with a second liquid inlet that communicates with the hollow structure of the spiral blade (3), and the second liquid inlet extends from the first or second end of the rotating shaft (1) to the hollow structure of the spiral blade (3), and the second or first end of the rotating shaft (1) is provided with a connection to the hollow structure of the spiral blade (3). The second liquid outlet is connected to the hollow structure, and the second liquid outlet extends from the second end or the first end of the rotating shaft (1) to the hollow structure of the spiral blade (3); the second liquid outlet is connected to the liquid inlet of the refrigeration mechanism, the liquid outlet of the refrigeration mechanism is connected to the liquid inlet of the pump body, and the liquid outlet of the pump body is connected to the second liquid inlet; the spiral blade (3) is divided into a circle every 360° of rotation, and multiple grid plates (4) are connected between each circle of spiral blade (3) and the adjacent circle of spiral blade (3), and the multiple grid plates (4) are spaced apart and evenly arranged along the rotation direction of the corresponding circle of spiral blade (3); The drive mechanism includes a first gear (5), a second gear (6) and a motor (7); the motor (7) is arranged on a frame located on the outer side of the first end of the cylinder (2), the second gear (6) is coaxially fixed on the output shaft of the motor (7), the first gear (5) is coaxially fixed on the rotating shaft (1) located on the outer side of the first end of the cylinder (2), and the first gear (5) and the second gear (6) are meshed together.

2. The flue gas de-whitening device of claim 1, wherein, The grating plate (4) is wavy.

Images