CN218321470U - Anti-fouling impact device for converter dry dust removal evaporative cooler - Google Patents

Abstract

The utility model relates to an anti-scaling object impact device for a converter dry-process dedusting evaporative cooler, which is installed in the banana bend below the flue gas outlet of the evaporative cooler; it is composed of several anti-collision beams arranged at intervals along the flue gas outlet transversely, The two ends of the anti-collision beam are fixedly connected with the upper side wall of the banana bend, and the top of the anti-collision beam is provided with broken ridges; the distance between the anti-collision beams is smaller than the width of the coarse ash discharge port. The device described in the utility model can not only effectively prevent the fouling on the inner wall of the evaporative cooler from falling off and block the lower coarse ash conveying mechanism, but also effectively prevent the falling and impacting of the fouling from damaging the built-in chain ash conveying device, and the structure is simple and easy to operate. It is convenient and easy to implement, and provides a guarantee for the smooth progress of production.

Description

Anti-fouling impact device for converter dry dust removal evaporative cooler

technical field

The utility model relates to a converter dry dust removal system, in particular to a converter dry dust removal evaporative cooler anti-scaling object impact device.

Background technique

Converter LT dry dedusting system is the core purification equipment for flue gas produced by converter smelting. It has been more and more widely used in domestic iron and steel enterprises for its efficient dedusting and environmental protection effects and good energy-saving performance.

The evaporative cooler is the first flue gas treatment equipment of the converter dry dust removal system. It sprays atomized water through several evaporative cold spray guns to cool down the converter smelting flue gas (from 1000°C to below 300°C), and at the same time makes the flue gas Coarse particles with larger particle sizes in the air are separated by gravity sedimentation inside. During the production process of the converter, due to factors such as the change of the atomized steam pressure of the evaporative cooling lance, the blockage and aging of the evaporative cooling lance, and the change of the flue gas flow in the flow field of the evaporative cooler, scaling will often occur on the inner wall of the evaporative cooler. As the production progresses, the thickness of the scaling layer will gradually increase, and finally the scaling layer will suddenly fall off as a whole, and the scale layer that falls off usually weighs several tons to more than ten tons.

A large number of blocky scales that fall instantly have large diameters (usually 1.5 to 3 meters in diameter), which will quickly block the coarse ash conveying mechanism (built-in chain ash conveyer, external chain ash conveyer, double-plate ash conveyer) valves, bucket elevators, etc.). At the same time, due to the falling height of the fouling over 30 meters, a huge kinetic energy impact is generated, which often leads to the chain breakage of the built-in chain ash conveyor under the evaporative cooler and the deformation of the track. In severe cases, even the production of the converter is forced to be interrupted.

In the past, after the evaporative cooler was blocked by dust and the equipment was damaged, the maintenance personnel could only enter through the manhole to carry out manual dust removal and equipment repair operations. Dirt will fall off at any time, which is very unfavorable to the safety of workers. Therefore, there is an urgent need for a solution that can effectively prevent the falling fouling from blocking the ash conveying mechanism and preventing the ash conveying mechanism from being damaged.

Contents of the invention

The utility model provides a converter dry-process dedusting evaporative cooler anti-scaling object impact device, which can effectively prevent the scaling objects on the inner wall of the evaporative cooler from falling off and block the lower coarse ash conveying mechanism, and can effectively prevent the scaling objects from falling The impact damages the built-in chain type ash conveyor equipment, and the structure is simple, the operation is convenient, and it is easy to implement, which provides a guarantee for the smooth progress of production.

In order to achieve the above object, the utility model adopts the following technical solutions to realize:

A converter dry-process dedusting evaporative cooler anti-fouling impact device installed in the banana bend below the flue gas outlet of the evaporative cooler; the flue gas outlet at the bottom of the evaporative cooler is connected to the raw gas pipeline through the banana bend, and the banana bend A built-in chain ash conveyor is installed at the bottom of the built-in chain ash conveyor, and a coarse ash discharge port is provided at the bottom of the banana bend at the feeding end of the built-in chain ash conveyor; the anti-scaling impact device consists of several anti-collision beams arranged at intervals along the flue gas outlet The two ends of the anti-collision beam are fixedly connected with the upper side wall of the banana bend, and the top of the anti-collision beam is provided with broken ridges; the distance between the anti-collision beams is smaller than the width of the coarse ash discharge port.

The several anti-collision beams are horizontally arranged side by side.

The apex angle of the crushing ridge is an acute angle.

The anti-collision beam is composed of an end casing and an anti-collision beam body; both ends of the anti-collision beam body are respectively fixedly connected with the end casing, and the end casing is supported on the side wall of the banana bend.

The end casing runs through the side wall of the banana bend, and the outer nozzle of the end casing is closed by a plug plate.

The cross section of the anti-collision beam body is an equilateral triangle or a similar equilateral triangle.

Compared with the prior art, the beneficial effects of the utility model are:

1) After the scale falls off, it first meets the anti-collision beam, and the scale is broken and separated instantly through the broken ridge. The distance between the anti-collision beam is smaller than the opening size of the coarse ash discharge port, so as to effectively prevent the ash conveying mechanism from being blocked;

2) The falling scale is buffered by the anti-collision beam, and the scale is broken, which effectively reduces the impact of the falling scale on the chain and track of the built-in chain ash conveyor, and avoids the chain of the built-in chain ash conveyor Faults such as fracture and track deformation occur;

3) The two ends of the anti-collision beam body are fixed with the side wall of the banana bend through the end sleeve, which is convenient for fixing and replacement; Strengthen the overall structural strength of the anti-collision beam;

4) In order to increase the structural strength of the anti-collision beam body and reduce the wind resistance on the windward side, and to ensure that the scale is fully broken after falling and hitting the anti-collision beam body, the cross-section of the anti-collision beam body adopts an equilateral triangle or a quasi-equilateral triangle , the top angle of the broken ridge is an acute angle.

Description of drawings

Figure 1 is a schematic diagram of the installation position of the anti-fouling impact device of the present invention.

Fig. 2 is a schematic diagram of the three-dimensional structure of the anti-collision beam of the present invention.

Fig. 3a is a first schematic diagram of the connection between the anti-collision beam body and the end sleeve of the utility model.

Fig. 3b is the second schematic diagram of the connection between the anti-collision beam body and the end sleeve of the utility model.

Fig. 3c is the third schematic diagram of the connection between the anti-collision beam body and the end bushing of the utility model.

Fig. 3d is a fourth schematic diagram of the connection between the anti-collision beam body and the end sleeve of the utility model.

In the figure: 1. Evaporative cooler 2. Banana bend 3. Raw gas pipeline 4. Built-in chain ash conveyor 5. Coarse ash discharge port 6. Anti-collision beam 61. End casing 62. Anti-collision beam body 63 .plug plate 64.broken ridge

detailed description

The specific embodiment of the utility model will be further described below in conjunction with accompanying drawing:

As shown in Fig. 1, the anti-scaling object impact device of a converter dry dust removal evaporative cooler described in the utility model is installed in the banana bend 2 below the flue gas outlet of the evaporative cooler 1; the bottom of the evaporative cooler 1 The flue gas outlet is connected to the raw gas pipe 3 through the banana bend 2. The bottom of the banana bend 2 is equipped with a built-in chain ash conveyor 4, and the bottom of the banana bend 2 at the feeding end of the built-in chain ash conveyor 4 is provided with a coarse ash discharge port. 5. The anti-fouling impact device is composed of several anti-collision beams 6 arranged at intervals along the flue gas outlet. The two ends of the anti-collision beams 6 are fixedly connected with the upper side wall of the banana bend 2. The top of the collision beam 6 is provided with broken ridges 64;

The several anti-collision beams 6 are horizontally arranged side by side.

The apex angle of the crushing ridge 64 is an acute angle.

As shown in Figure 2, the anti-collision beam 6 is composed of an end casing 61 and an anti-collision beam body 62; the two ends of the anti-collision beam body 62 are respectively fixedly connected with the end casing 61, and the end casing 61 supports On the side wall of Banana Bend 2.

The end casing 61 runs through the side wall of the banana bend 2 , and the outer nozzle of the end casing 61 is closed by a plug plate 63 .

The cross section of the anti-collision beam body 62 is an equilateral triangle or a similar equilateral triangle.

The cross-section of the anti-collision beam body 62 can be an equilateral triangle or a similar equilateral triangle (that is, there are local changes on the basis of the equilateral triangle), and the top of the broken ridge 64 cross-section has an acute angle structure, which can effectively treat the falling fouling At the joint between the anti-collision beam body 62 and the end casing 61, the three vertices of the anti-collision beam body 62 are respectively welded and fixed to the corresponding end casing 61.

As shown in FIG. 3 a , the cross section of the anti-collision beam body 62 is an equilateral triangle. As shown in Figures 3b to 3d, the cross sections of the anti-collision beam body 62 are all equilateral triangles, that is, local improvements are made on the basis of equilateral triangles; The cross-sectional shape is based on an equilateral triangle, and the upper two sides are changed into a concave broken line shape (making the top angle of the broken ridge 64 smaller). As shown in FIG. 3 c , the cross-sectional shape of the anti-collision beam body 62 is based on an equilateral triangle, and the three sides are all changed into concave broken lines, and the final shape is a star triangle. As shown in Fig. 3d, on the basis of the cross-sectional shape of the anti-collision beam body 62 shown in Fig. 3c, a convex arc section is provided in the middle of each side to increase the strength.

The following examples are carried out on the premise of the technical solution of the utility model, and detailed implementation and specific operation process are provided, but the protection scope of the utility model is not limited to the following examples.

【Example】

In this embodiment, in order to prevent the fouling on the inner wall of the evaporative cooler of the converter dry dedusting system from falling, blocking the ash conveying mechanism below, and impacting and destroying the chain and track of the built-in chain ash conveyer, the flue gas outlet at the bottom of the evaporative cooler An anti-fouling impact device is installed on the upper part of the banana bend below and above the built-in chain conveyor.

As shown in Figure 1, in this embodiment, the anti-scaling impact device is composed of three anti-collision beams 6. After the scaling falls off, it is first blocked by the anti-collision beams 6, and it is broken and separated to prevent the ash conveying mechanism The purpose of blocking. The anti-collision beam 6 buffers the falling fouling, effectively reducing the impact of the fouling on the chain and track of the built-in chain ash conveyor 4, thereby avoiding chain breakage and track deformation of the built-in chain ash conveyor 4 etc. damage.

In this embodiment, according to the weight, block diameter, hardness and other characteristics of the fouling on the inner wall of the evaporative cooler 1, and considering the falling height difference of the fouling, the following technical solutions are formulated:

1. Three anti-collision beams 6 are installed on the upper part of the banana bend 2 at 2.5 meters above the built-in chain conveyor 4, each anti-collision beam 6 is arranged horizontally, and the three anti-collision beams 6 are arranged in parallel;

2. The bottom of the banana bend 2 is provided with a coarse ash discharge port 5 at the feeding end corresponding to the built-in chain ash conveyor 4. The opening size of the coarse ash discharge port 5 is 500mm×500mm, and the distance between the three anti-collision beams 6 The design is 450mm to ensure that the size of the shed scale after being broken by the anti-collision beam 6 is smaller than the opening size of the coarse ash discharge port 5, so that it can be smoothly discharged from the coarse ash discharge port;

3. As shown in Figure 2, in order to facilitate the replacement and fixing of the anti-collision beam 6, the anti-collision beam 6 is composed of end sleeves 61 at both ends and the anti-collision beam body 62, and the two ends of the anti-collision beam body 62 pass through the end The casing 61 is fixedly connected to the side wall of the banana 2, and the inner wall of the end casing 61 and the anti-collision beam body 62 are fixed by welding. While supporting the anti-collision beam body 62, the end casing 61 can also improve its overall strength and prevent the anti-collision beam body 62 from being deformed due to heat and the impact of scaling objects.

4. In order to prevent the inhalation of air and the overflow of converter gas during the production process of the converter, the two ends of the end sleeve 61 are respectively provided with a plug plate 63, and the plug plate 63 and the end sleeve 61 are fully welded to realize sealing;

5. In this implementation, considering that the anti-collision beam body 62 needs to have sufficient structural strength and reduce the wind resistance on the windward side, and at the same time ensure that the falling scale is fully broken after hitting the anti-collision beam 6, the anti-collision beam The body adopts a cross-sectional shape as shown in Fig. 3d.

In this example, anti-collision devices have been installed in the converter dry dust removal evaporative coolers for three converters in a steelmaking plant since the beginning of 2021, and the effect has been good after being put into use. So far, there has been no blockage or damage to the ash conveying mechanism due to the falling of scales The built-in chain ash conveyor chain and track accidents have achieved the expected goal.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Any equivalent replacement or change of the new technical solution and its concept should be covered within the protection scope of the present utility model.

Claims (6)

1. A converter dry-process dedusting evaporative cooler anti-scaling object impact device, installed in the banana bend below the flue gas outlet of the evaporative cooler; the flue gas outlet at the bottom of the evaporative cooler is connected to the raw gas pipeline through the banana bend, The bottom of the banana bend is equipped with a built-in chain ash conveyor, and the bottom of the banana bend corresponding to the discharge end of the built-in chain ash conveyor is provided with a coarse ash discharge port; the feature is that the anti-scaling impact device is arranged at intervals along the flue gas outlet The two ends of the anti-collision beam are fixedly connected with the upper side wall of the banana bend, and the top of the anti-collision beam is provided with broken ridges; the distance between the anti-collision beams is smaller than the opening size of the coarse ash discharge port. 2 . The anti-fouling impact device for converter dry dedusting evaporative cooler according to claim 1, characterized in that the several anti-collision beams are horizontally arranged side by side. 3 . The anti-fouling impact device for converter dry dedusting evaporative cooler according to claim 1, characterized in that, the apex angle of the crushing ridge is an acute angle. 4. A converter dry-process dedusting evaporative cooler anti-fouling impact device according to claim 1 or 2, characterized in that, the anti-collision beam is composed of an end sleeve and an anti-collision beam body; the anti-collision beam body The two ends of each are respectively fixedly connected with the end casing, and the end casing is supported on the side wall of the banana bend. 5. The anti-scaling object impact device of a converter dry-process dedusting evaporative cooler according to claim 4, characterized in that, the end casing runs through the side wall of the banana bend, and the outer end pipe of the end casing The mouth is closed by a plug plate. 6 . The anti-fouling impact device for converter dry dedusting evaporative cooler according to claim 4, characterized in that, the cross section of the anti-collision beam body is an equilateral triangle or a quasi-equilibrium triangle.

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