CN116042939A - Anti-icing device suitable for chimney top - Google Patents

Abstract

The invention discloses an anti-icing device suitable for the top of a chimney, which comprises a wind shield, a water collecting plate and a chimney which are connected from top to bottom; the water collecting plate comprises a vertical side and an inclined side, the lower end of the vertical side is connected with the outer edge of the upper end of the inclined side, and the outer edge of the lower end of the inclined side is connected with the top of the chimney to form a water collecting side; the top of the chimney is also provided with a water return hole at the position of the water collecting side. According to the invention, the wind guard is arranged on the periphery of the top of the chimney, so that disturbance of external wind to the outlet flue gas can be reduced, the flow direction of the flue gas at the top of the chimney is improved, and entrainment of condensed water in the outlet flue gas is effectively reduced. Meanwhile, the water baffle plates are arranged on the periphery of the top of the chimney and the top edge of the cylindrical water collecting plate, and the water return holes are arranged on the periphery of the top of the chimney, so that water drops entrained in smoke in the outlet area of the chimney can be effectively intercepted, liquid water carried by the smoke can be ingeniously recycled into the chimney, the liquid water circulation is realized, and the purpose of preventing the chimney from icing is achieved.

Description

An anti-icing device suitable for the top of the chimney

technical field

The invention relates to the technical field of anti-icing devices for blast furnace chimneys, in particular to an anti-icing device suitable for the top of the chimney.

Background technique

The net flue gas after desulfurization by the wet desulfurization system usually carries a certain amount of water droplets and water vapor, and as the operating time of the demister increases, the work efficiency decreases, and the content of water droplets and water vapor carried by the net flue gas will increase. The net flue gas from wet desulfurization, due to the high humidity in the top area of the chimney, the flue gas in cold regions will condense and form ice on the top of the chimney. Icing on the top of the chimney not only seriously affects the structural safety of the chimney, but also has a greater risk of falling off, which brings great safety hazards to the inspection and maintenance personnel and equipment at the lower part of the chimney.

At present, the anti-icing devices at the top of the chimney mainly include: 1. Adding a heating and heat tracing device at the top of the chimney; 2. Changing the structural design of the top of the chimney. The first type often needs to build a heating pipeline on the top of the chimney, although the anti-icing effect is better; while the chimney is generally 180-250 meters, there are problems such as high energy consumption, inconvenient construction, high operation and maintenance costs, and short life. The second structure is relatively simple, and the maintenance cost is relatively low, which can slow down the icing on the top of the chimney to a certain extent, but it cannot fundamentally solve the problem of icing on the chimney in cold regions.

Therefore, it is necessary to provide a device that does not require additional heating and heat tracing and can effectively suppress the icing of the chimney.

Contents of the invention

The anti-icing device of the present invention, by reducing the flow rate of the flue gas at the chimney outlet, setting a windshield at the upper air outlet, setting a water baffle at the top edge of the device, and setting a recovery water tank outside the device, the liquid state carried by the flue gas is cleverly The water is recycled back into the chimney. The device of the present invention has the advantages of simple structure, low cost, convenient repair and maintenance, and can make full use of the heat of the flue gas itself without increasing additional energy consumption, and successfully solves the problem of icing of the chimney at the top of the chimney in cold regions.

In order to achieve the above object, the present invention provides an anti-icing device suitable for the top of the chimney, including a windshield, a water collecting plate and a chimney connected from top to bottom;

The water collecting plate includes a vertical side and an inclined side, the lower end of the vertical side is connected to the upper outer edge of the inclined side, and the lower outer edge of the inclined side is connected to the top of the chimney to form a water collecting plate side;

The top of the chimney is also provided with a water return hole at the water collecting side.

Further, the inclined side is set high on the outside and low on the inside, with a slope of 30-60°;

The length of the inclined side is 1-3m.

Further, the water return hole is located 5-10 cm above the connection position between the top of the chimney and the outer edge of the lower end of the inclined side.

Further, the return water hole is a circular hole with a diameter of 3-5 cm.

Further, the height of the windshield is 0.3-2m.

Further, the height of the vertical side is 0.2-1m.

Further, the top of the vertical side is also provided with a first water baffle;

The width of the first water retaining plate is 5-10cm.

Further, the top of the chimney is also provided with a second water baffle;

The width of the second water retaining plate is 5-10cm.

Further, an H-shaped steel is fixed below the position where the outer edge of the lower end of the inclined side is connected to the top of the chimney;

The H-shaped steel is connected to the inclined side for fixing the inclined side.

Further, the windshield includes a windward side and a leeward side, and the windward side and the leeward side are gradually connected smoothly.

Compared with the prior art, the present invention has the following beneficial effects:

In the anti-icing device of the present invention, a water collecting plate and a windshield are arranged on the periphery of the top of the chimney, which can slow down the flow rate of the flue gas at the outlet, and a windshield is arranged on the top of the chimney within the range of 180° of the perennial dominant wind direction, which can reduce the impact of external wind on the outlet. Flue gas disturbance improves the flow direction of the flue gas at the top of the chimney and effectively reduces the entrainment of condensed water in the flue gas at the outlet. At the same time, water baffles are set around the top of the chimney and the top edge of the cylindrical water collecting plate, and water return holes are set around the top of the chimney, which can effectively intercept water droplets entrained in the flue gas at the chimney outlet area, and skillfully divert the liquid in the flue gas. The water is recycled to the inside of the chimney to realize liquid water circulation, thereby achieving the purpose of preventing the chimney from freezing.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the apparatus pointed out in the written description as well as the appended drawings.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 shows a front view sectional structural schematic diagram of an anti-icing device suitable for the top of a chimney according to an embodiment of the present invention.

Fig. 2 shows a top view sectional structural schematic diagram of a kind of anti-icing device applicable to the top of the chimney according to a preferred embodiment of the present invention;

Explanation of reference signs:

1. Windshield; 2-1. Vertical side; 2-2. Inclined side; 3-1. Second watershield; 3-2. First watershield; 4. Backwater hole; 5. H Section steel; 6. Chimney.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention in combination with the specific embodiments of the present invention and the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in Figure 1, a kind of anti-icing device applicable to the top of the chimney is provided in one embodiment of the present invention, comprises the windshield 1 that connects from top to bottom, water collecting plate and chimney 6; Said windshield The height of the board 1 is 0.3-2m, and the windshield 1 includes a windward side and a leeward side, and the windward side and the leeward side are gradually and gently connected, wherein the windward side is set within 180° of the perennial dominant wind direction, and the windward side The height of the side is 0.3-2m; the water collecting plate includes a vertical side 2-1 and an inclined side 2-2, and the lower end of the vertical side 2-1 is in contact with the upper end outer edge of the inclined side 2-2. connection, the height of the vertical side 2-1 is 0.2-1m, the top of the vertical side 2-1 is also provided with a first water retaining plate 3-2, the first water retaining plate 3-2 is connected with the vertical The top of the side 2-1 is vertically arranged, the width of the first water retaining plate 3-2 is 5-10 cm, the outer edge of the lower end of the inclined side 2-2 is connected with the top of the chimney 6 to form a water collection side, The inclined side 2-2 is set high on the outside and low on the inside, with an inclined slope of 30-60°; the length of the inclined side 2-2 is 1-3m; the top of the chimney 6 is located at the water collecting side. A backwater hole 4 is provided, and the backwater hole 4 is located at 5-10 cm above the connection position between the top of the chimney 6 and the lower end outer edge of the inclined side 2-2, and the backwater hole 4 is along the chimney. 6 tops are arranged in an array at the same height for a week. The top of the chimney 6 is also provided with a second water retaining plate 3-1, the second water retaining plate 3-1 is vertically arranged with the top of the chimney 6, and the width of the second water retaining plate 3-1 is It is 5-10cm. H-shaped steel 5 is also fixed below the connection position of the lower end outer edge of the inclined side 2-2 and the top of the chimney 6; the H-shaped steel 5 is connected with the inclined side 2-2 for fixing the inclined Side 2-2.

In this embodiment, the material of the windward side, the leeward side, the vertical side 2-1, the inclined side 2-2, the first water retaining plate 3-2 and the second water retaining plate 3-1 is stainless steel, and the windward side, The connection/fixation methods of the leeward side, the vertical side 2-1, the inclined side 2-2, the H-shaped steel 5, the first water retaining plate 3-2 and the second water retaining plate 3-1 are all formed by welding.

As shown in Figure 2, in a preferred embodiment of the present invention, the structures of the windshield 1 and the water collecting plate applicable to the anti-icing device at the top of the chimney are all cylindrical, with vertical sides 2-1, inclined The side 2-2 and the chimney 6 form a ring-shaped water collection part, the return hole 4 is a circular hole with a diameter of 3-5cm, and the return hole 4 is arrayed at the same height along the top of the chimney 6 for a week. The top of the vertical side 2-1 is also provided with a first water retaining plate 3-2, and the first water retaining plate 3-2 is arranged in a circle along the top of the vertical side 2-1; the second retaining plate at the top of the chimney 6 The water plate 3-1 is arranged in a circle along the top of the chimney 6.

The anti-icing device applicable to the top of the chimney according to the preferred embodiment of the present invention is used in a demonstration project of a power plant in a power plant in a cold northern region to discharge coal, electricity, and aluminum flue gas pollutants towards zero, and the problem of icing on the top of the chimney has been successfully solved. The chimney does not freeze during operation. The anti-icing device of the present invention is simple in structure, low in cost, convenient in repair and maintenance, and can make full use of the heat of the flue gas itself without increasing additional energy consumption, and successfully solves the problem of icing on the top of the chimney in the cold northern region.

In summary, a kind of anti-icing device applicable to the top of the chimney of the present invention is provided with a water collecting plate and a windshield on the periphery of the top of the chimney, which can slow down the velocity of the flue gas at the outlet, and the dominant wind direction at the top of the chimney is within 180° all the year round. The windshield is installed inside, which can reduce the disturbance of the external wind to the flue gas at the outlet, improve the flow direction of the flue gas at the top of the chimney, and effectively reduce the entrainment of condensed water in the flue gas at the outlet. At the same time, water baffles are set around the top of the chimney and the top edge of the cylindrical water collecting plate, and water return holes are set around the top of the chimney, which can effectively intercept water droplets entrained in the flue gas at the chimney outlet area, and skillfully divert the liquid in the flue gas. The water is recycled to the inside of the chimney to realize liquid water circulation, thereby achieving the purpose of preventing the chimney from freezing.

Finally, it should be noted that: the above is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it still It is possible to modify the technical solutions recorded in the foregoing embodiments, or to perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the present invention shall be included in the within the protection scope of the present invention.

Claims (10)

1. An anti-icing device suitable for the top of a chimney is characterized by comprising a wind deflector (1), a water collecting plate and a chimney (6) which are connected from top to bottom;

the water collecting plate comprises a vertical side (2-1) and an inclined side (2-2), wherein the lower end of the vertical side (2-1) is connected with the outer edge of the upper end of the inclined side (2-2), and the outer edge of the lower end of the inclined side (2-2) is connected with the top of the chimney (6) to form a water collecting side;

the top of the chimney (6) is also provided with a water return hole (4) at the position of the water collecting side.

2. The device according to claim 1, characterized in that the inclined side (2-2) is arranged with an outer high and an inner low, with an inclination of 30-60 °;

the length of the inclined side (2-2) is 1-3m.

3. The device according to claim 1, characterized in that the water return hole (4) is located 5-10cm above the connection of the top of the chimney (6) to the lower outer edge of the inclined side (2-2).

4. The device according to claim 1, characterized in that the return water hole (4) is a circular hole with a diameter of 3-5 cm.

5. Device according to claim 1, characterized in that the height of the wind deflector (1) is 0.3-2m.

6. The device according to claim 1, characterized in that the height of the vertical side (2-1) is 0.2-1m.

7. The device according to claim 1, characterized in that the top end of the vertical side (2-1) is also provided with a first water deflector (3-2);

the width of the first water baffle (3-2) is 5-10cm.

8. The device according to claim 1, characterized in that the top end of the chimney (6) is also provided with a second water deflector (3-1);

the width of the second water baffle (3-1) is 5-10cm.

9. The device according to claim 1, characterized in that an H-section steel (5) is also fixed below the connection location of the lower outer edge of the inclined side (2-2) with the top of the chimney (6);

the H-shaped steel (5) is connected with the inclined side (2-2) and is used for fixing the inclined side (2-2).

10. The device according to any one of claims 1-9, wherein the wind deflector (1) comprises a windward side and a leeward side, which are gradually gently connected.

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