CN217724886U - Flue gas defogging device - Google Patents

Abstract

The utility model discloses a flue gas demisting device, which comprises a cylinder, guide vanes, an impeller and a liquid collecting tank; the guide vanes and the impeller are sequentially arranged in the cylinder from top to bottom, and the liquid collecting tank is fixedly arranged on the outer wall of the impeller and the inner wall of the cylinder; the cylinder, the guide vanes, the impeller and the liquid collecting tank are concentrically arranged; the liquid collecting tank comprises a liquid inlet and a liquid outlet, the liquid inlet is arranged on the top wall of the liquid collecting tank, and the liquid outlet is arranged on the side wall of the liquid collecting tank and extends out of the outer wall of the barrel. The utility model discloses simple structure, gas-liquid separation is efficient, and the running resistance is little, is a gas-liquid separation device that cost performance is very high.

Description

Flue gas defogging device

Technical Field

The utility model relates to an energy-concerving and environment-protective technical field especially relates to a flue gas defogging device.

Background

During wet desulfurization, absorption tower is easy to produce fog with particle size of 10-60 micron, which contains water, sulfuric acid, sulfate, sulfur dioxide, etc. and results in pollution and serious corrosion of blower, heat exchanger and flue. If the demisting is not good, the flue gas carries slurry to downstream equipment, such as a bright air heater, an induced draft fan (commonly used for industrial boiler desulfurization) and a flue, and then blockage, serious vibration of the induced draft fan, serious corrosion and scaling of the flue are caused, so that the operation is forced to be stopped.

The current mainstream demister comprises a baffle plate demister and a rotating impeller demister. Wherein baffling board impeller defroster utilizes inertial collision, reaches the effect of defogging, but this defroster's adaptation velocity of flow is 3 ~ 4m/s, and to higher velocity of flow, defogging efficiency is poor, and easy secondary carries. Rotatory impeller defroster utilizes centrifugal separation, and vaporific liquid drop produces rotatoryly through the impeller, and makes centrifugal motion get rid of to the section of thick bamboo wall, reaches the effect of annihilating the collection, and this type of defroster can adapt to 5 ~ 6 ms's flue gas velocity of flow, and this section defroster requires that the flue gas water content is few, under the flue gas condition that has a large amount of liquid drops, leads to producing on the impeller easily and holds the liquid layer, and very big destruction defogging efficiency has increased running resistance and stability.

SUMMERY OF THE UTILITY MODEL

Accordingly, the demisting efficiency is reduced in order to avoid the generation of a liquid holding layer on the impeller. The utility model provides a flue gas defogging device.

The technical scheme of the utility model provides a flue gas defogging device, which comprises a cylinder body, guide vanes, an impeller and a liquid collecting tank; the guide vanes and the impeller are sequentially arranged in the cylinder body from top to bottom, and the liquid collecting tank is fixedly arranged on the outer wall of the impeller and the inner wall of the cylinder body; the cylinder, the guide vane, the impeller and the liquid collecting tank are concentrically arranged; the liquid collecting tank comprises a liquid inlet and a liquid outlet, the liquid inlet is arranged on the top wall of the liquid collecting tank, and the liquid outlet is arranged on the side wall of the liquid collecting tank and extends out of the outer wall of the barrel.

Among the above-mentioned technical scheme, the collecting tank can collect the water among the flue gas defogging device, and through the above-mentioned flue gas defogging device of the water discharge of liquid outlet with collecting, avoid the water droplet to gather in flue gas defogging device, produce on the impeller and hold the liquid layer, reduce defogging efficiency.

Further, the liquid inlet is an arc-shaped flow deflector extending upwards from the top wall of the liquid collecting tank, an included angle between the arc-shaped flow deflector and the horizontal plane is 45 degrees, and the concave surface of the arc-shaped flow deflector is opposite to the rotating direction of the impeller.

Furthermore, the number of the liquid inlets is 6-8, and the liquid inlets are uniformly arranged along the axis of the cylinder body.

Furthermore, an upper sealing plate is installed on one side of the guide vane, which deviates from the impeller.

Further, the bottom wall of the liquid collecting groove and the bottom wall of the liquid outlet are in the same horizontal plane.

Furthermore, the diameter of the cylinder is 440mm-460mm.

Further, the guide vanes comprise 18-24 vanes, the width of each vane is 45-50mm, the height of each vane is 500mm, and each vane and the outer wall of the impeller form an included angle of 30 degrees.

Further, the diameter of the impeller is 300mm.

Furthermore, the upper sealing plate is a circular sealing plate, and the diameter of the upper sealing plate is 300mm.

Further, the cross section of the liquid outlet is square.

The utility model provides a flue gas defogging device, its simple structure, adaptation flue gas velocity of flow is high, and the defogging is efficient, is a very high defogging device of cost performance ratio.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a front view of a flue gas demisting device according to an embodiment of the present invention;

fig. 2 is a perspective view illustrating a flue gas demisting device according to an embodiment of the present invention;

fig. 3 is a partial schematic view of a liquid inlet, a liquid collecting tank and a liquid outlet provided by an embodiment of the present invention;

fig. 4 shows a schematic view of an impeller provided by an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a flue gas demisting process according to an embodiment of the present invention;

FIG. 6 is a schematic view of the liquid inlet and the liquid collecting tank provided by an embodiment of the present invention for collecting the captured slurry;

figure 7 is a schematic view of slurry provided by an embodiment of the present invention before and after entering a sump.

Description of the reference numerals:

1-cylinder, 2-guide vane, 3-impeller, 4-liquid collecting tank, 5-upper sealing plate, 6-liquid inlet, 7-liquid outlet.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The utility model provides a flue gas defogging device can be applied to the occasion that flue gas dewatering, defogging need be done in fields such as environmental protection, chemical industry.

As shown in fig. 1, 2 and 4, a flue gas demisting device comprises a cylinder 1, guide vanes 2, an impeller 3 and a liquid collecting tank 4. The guide vanes 2 and the impeller 3 are sequentially installed in the barrel 1 from top to bottom, and the liquid collecting tank 4 is fixedly installed on the outer wall of the impeller 3 and the inner wall of the barrel 1. The cylinder 1, the guide vane 2, the impeller 3 and the liquid collecting tank 4 are concentrically arranged. The liquid collecting tank 4 comprises a liquid inlet 6 and a liquid outlet 7, the liquid inlet 6 is arranged on the top wall of the liquid collecting tank 4, and the liquid outlet 6 is arranged on the side wall of the liquid collecting tank 4 and extends out of the outer wall of the barrel body 1.

The number of the guide vanes 2 is 18-24, the guide vanes are uniformly distributed along the axis of the cylinder, and each vane forms an included angle of 30 degrees with the outer wall of the impeller. The blades may be 40mm, 45mm or 50mm wide and 500mm high. The lower part of the guide vane is welded with the outer wall of the impeller, and the upper part of the guide vane is welded with the upper sealing plate.

As shown in fig. 3, according to the utility model discloses an embodiment, above-mentioned collecting tank is the loop configuration, the outer wall welding of collecting tank inside wall and impeller, the lateral wall and the barrel inner wall welding of collecting tank.

As shown in fig. 6 and 7, the liquid inlet 6 is an arc-shaped flow deflector extending upwards from the top wall of the liquid collecting tank, the included angle between the arc-shaped flow deflector and the horizontal plane is 45 degrees, and the concave surface of the arc-shaped flow deflector is opposite to the rotation direction of the impeller.

According to the utility model discloses a further embodiment, inlet 6 can be for prolonging the honeycomb duct that the catch basin upper surface extends 30mm, the radial cross-section of honeycomb duct is semi-circular, and the honeycomb duct is 45 with the vertical direction, and the orientation is opposite with the air current direction of rotation.

When the liquid inlet is prepared specifically, the number of the liquid inlets 6 can be set to 6-8, and the liquid inlets are uniformly arranged along the axis of the cylinder body 1.

In order to better remove a large amount of fog drops carried in the flue gas, one side of the guide vane 2, which is far away from the impeller 3, is provided with an upper sealing plate 5. Because the upper sealing plate blocks, the smoke moving upwards is forced to flow out from the gap between the two adjacent blades through the guide vanes, the rotating motion is further strengthened, and the fog drops are captured by the inner wall of the cylinder body due to the centrifugal motion. Furthermore, the upper sealing plate is a circular sealing plate, the lower edge of the upper sealing plate is welded with the upper edge of the guide vane, and the diameter of the upper sealing plate is 300mm.

The liquid outlet 7 is arranged on the side face of the liquid collecting tank, and the liquid outlet 7 extends out of the outer wall of the barrel body 1 to be used for guiding out the slurry. In order to make the liquid collecting tank not accumulate liquid, according to the utility model discloses an embodiment, the liquid outlet is in same horizontal plane with the collecting tank bottom.

Above-mentioned flue gas defogging device is when using, and the flue gas carries vaporific liquid drop through this device's impeller 3 and guide vane 2 time, produces rotary motion, and the liquid drop is got rid of to the inner wall of barrel 1 because of centrifugal action to keep the rotary motion the same with the air current direction of rotation, because the inlet 6 that the equipartition had the contrary air current direction to set up in the 4 tops of collecting tank, the liquid that the entrapment got off can get into collecting tank 4 through inlet 6 at rotatory in-process, then through 6 eduction gear of liquid outlet. The flue gas continues to move upwards and flows out of the device after liquid drops carried in the flue gas are removed by the device, so that the gas-liquid separation of the flue gas is realized. Simultaneously, the collecting tank avoids the water droplet to gather in flue gas defogging device outside the liquid eduction gear, produces on the impeller and holds the liquid layer, reduces defogging efficiency.

When the flue gas demisting device is prepared specifically, the diameter of the cylinder body can be as follows: 440mm;450mm;460mm. The diameter of the impeller is 300mm.

Further, as shown in fig. 2, the cross section of the liquid outlet is square, and the liquid outlet is in flat connection with the bottom of the liquid collecting tank, so that water collected by the defogging device cannot be accumulated in the liquid collecting tank.

After the smoke rotates through the guide vanes, the fog drops in the smoke are captured by the inner wall of the cylinder due to centrifugal motion, as shown in fig. 5-7. The captured fog drops are converged at the top of the liquid collecting tank under the action of gravity and are driven by the rotating airflow to rotate. In the movement process, the liquid collecting tank can be intersected with liquid inlets which are uniformly distributed at the top of the liquid collecting tank and are opposite to the airflow direction. Therefore, the collected fog drops enter the liquid collecting tank through the liquid inlet.

The collected fog drops enter the liquid collecting tank and then flow out of the device through the liquid outlet. So far, this device realizes the flue gas defogging to the thick liquid or the water that will catch are derived to the device outside.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, elements recited by the phrase "comprising a" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Finally, it should be noted that: the above description is only the preferred embodiment of the present invention, which is only used to illustrate the technical solution of the present invention, and is not used to limit the protection scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention is included in the protection scope of the present invention.

Claims (10)

1. A flue gas demisting device is characterized by comprising a cylinder, guide vanes, an impeller and a liquid collecting tank;

the guide vanes and the impeller are sequentially arranged in the cylinder from top to bottom, and the liquid collecting tank is fixedly arranged on the outer wall of the impeller and the inner wall of the cylinder; the cylinder, the guide vanes, the impeller and the liquid collecting tank are concentrically arranged;

the liquid collecting tank comprises a liquid inlet and a liquid outlet, the liquid inlet is arranged on the top wall of the liquid collecting tank, and the liquid outlet is arranged on the side wall of the liquid collecting tank and extends out of the outer wall of the barrel.

2. The flue gas demisting device according to claim 1, wherein the liquid inlet is an arc-shaped flow deflector extending upwards along the top wall of the liquid collecting tank, the angle between the arc-shaped flow deflector and the horizontal plane is 45 degrees, and the concave surface of the arc-shaped flow deflector is opposite to the rotation direction of the impeller.

3. The flue gas demisting device according to claim 2, wherein the number of the liquid inlets is 6-8, and the liquid inlets are uniformly arranged along the axis of the cylinder.

4. The flue gas demisting apparatus as set forth in claim 1 wherein an upper sealing plate is mounted on a side of the guide vanes facing away from the impeller.

5. The flue gas demisting apparatus according to claim 1, wherein the bottom wall of the liquid collection tank is at the same level as the bottom wall of the liquid outlet.

6. The flue gas demisting device according to claim 1, wherein the diameter of the cylinder is 440mm to 460mm.

7. The flue gas demisting device according to claim 1, wherein the guide vanes comprise 18 to 24 vanes, the width of the vanes is 45 to 50mm, the height of the vanes is 500mm, and each vane forms an included angle of 30 degrees with the outer wall of the impeller.

8. The flue gas demisting apparatus according to claim 1, wherein the impeller is 300mm in diameter.

9. The flue gas demisting apparatus according to claim 4, wherein the upper plate is a circular plate having a diameter of 300mm.

10. The flue gas demisting device according to claim 1, wherein the cross section of the liquid outlet is square.

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