Three-time cooling system of continuous casting billet and steam extraction pipeline drainage device of three-time cooling system

Abstract

The utility model discloses a three-time cooling system of a continuous casting billet and a steam extraction pipeline drainage device of the three-time cooling system. The three-time cooling system comprises a water baffle, a drainage hole in front of the water baffle and a drainage pipe. The water baffle is arranged on the last section of the steam extraction pipeline; the drainage hole in front of the water baffle is arranged at the lowest point of the pipeline in the direction opposite to the air flow of the water baffle; the drainage pipes correspond to the drainage holes in size, and water is drained to other large-specification drainage pipes or drained independently. According to the triple cooling system and the steam pumping pipeline drainage device thereof, condensate water in the steam pumping pipeline is drained in advance, most of the condensate water is prevented from entering the fan impeller casing, the problem of water accumulation in the fan impeller casing is solved, the problems that due to water accumulation, fan operation resistance is increased, and power consumption is high are solved, and the service life of the fan is prolonged. The air loss is reduced, and the steam extraction effect is improved.

Description

Technical Field

[0001] The present application relates to the field of iron and steel metallurgy, and in particular to a tertiary cooling system for continuous casting billets. Background Art

[0002] In the production process of continuous casting billets, the three-stage cooling system of continuous casting billets can be used to avoid hot delivery cracks and increase the hot delivery temperature and hot delivery rate. During operation, the three-stage cooling system device collects steam through the cooling box and discharges it through the steam extraction system.

[0003] Since the extracted steam is the gas generated after the high-temperature continuous casting billet is cooled by spraying water, its humidity can reach more than 95%. When it passes through the steam extraction pipeline, a large amount of condensed water enters the fan impeller casing and cannot be discharged in time to form water accumulation, which increases the operating resistance of the fan, increases power consumption, reduces air volume, and affects the steam extraction effect.

[0004] Therefore, how to effectively prevent the condensed water in the fan impeller casing from being unable to be discharged in time and forming water accumulation is a technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0005] The purpose of the present application is to provide a tertiary cooling system for a continuous casting billet and a steam extraction pipe drainage device thereof, which can discharge the condensed water in the steam extraction pipe in advance, prevent most of the condensed water from entering the fan impeller casing, and allow the small amount of condensed water that enters the fan impeller casing to be discharged through its own drainage port to prevent the formation of water accumulation.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] A drainage device for a steam extraction pipeline of a tertiary cooling system of a continuous casting billet comprises a water baffle plate arranged on the last section of the steam extraction pipeline, a drainage hole in front of the water baffle plate and a drainage pipe.

[0008] The steam extraction pipeline is a pipeline from the steam extraction outlet of the cooling box to the air inlet of the fan, which is used to transport the steam generated when the tertiary cooling system is working to the fan and discharge it to the steam outlet of the tertiary cooling system.

[0009] The last section of the steam extraction pipeline is the horizontal pipe section of the steam extraction pipeline connecting the fan air inlet flange, and this should also be the lowest pipe section of the steam extraction pipeline.

[0010] The water retaining plate is arranged at the lowest point of the last section of the steam extraction pipeline, is made of steel plate, is fully welded to the last section of the steam extraction pipeline, and is subjected to anti-corrosion treatment.

[0011] The drainage hole corresponds to the size of the drainage pipe and is slightly smaller than the outer diameter of the drainage pipe to prevent the drainage pipe from extending out of the drainage hole and forming water accumulation near the drainage hole; the drainage hole is set in the opposite direction of the airflow of the water baffle and at the lowest point of the pipeline.

[0012] The drainage pipe is discharged to other large-sized drainage pipes, and the connection with the last section of steam extraction pipeline and other large-sized drainage pipes should be fully welded to prevent cooling water leakage. The material is steel pipe and anti-corrosion treatment is carried out.

[0013] The other large-sized drain pipes mentioned above can be the on-site filter drain pipes of the tertiary cooling system or other existing drain pipes. Their specifications are larger than the drain pipes, and can simultaneously meet the drainage needs of the original equipment and the steam extraction pipeline drainage devices. When there are no other large-sized drain pipes nearby, the drain pipes can also drain water to the slag flushing ditch alone.

[0014] The tertiary cooling system provided in the present application is provided with the above-mentioned steam extraction pipe drainage device. Since the steam extraction pipe drainage device of the tertiary cooling system of the continuous casting billet has the above-mentioned technical effect, the tertiary cooling system provided with the steam extraction pipe drainage device of the tertiary cooling system of the continuous casting billet should also have the corresponding technical effect.

[0015] A tertiary cooling system for a continuous casting billet and a steam extraction pipe drainage device thereof produce the following beneficial effects: by discharging most of the condensed water in the steam extraction pipe in advance, most of the condensed water is prevented from entering the fan impeller casing, so that the small amount of condensed water that enters the fan impeller casing can be discharged through its own drainage port, thereby solving the problem of water accumulation in the fan impeller casing, avoiding the problems of increased fan operation resistance and high power consumption caused by water accumulation, reducing air volume loss, and improving steam extraction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A structural schematic diagram of a specific implementation of a steam extraction pipeline drainage device for a tertiary cooling system of a continuous casting billet provided in the present application;

[0018] Among them, 1: the last section of the steam extraction pipeline; 2: water baffle; 3: drainage hole; 4: drainage pipe; 5: other large-sized drainage pipes. DETAILED DESCRIPTION

[0019] The core of the present application is to provide a steam extraction pipeline drainage device for the tertiary cooling system of continuous casting billets, which can discharge the condensed water in the steam extraction pipeline in advance, prevent most of the condensed water from entering the fan impeller housing, and allow the small amount of condensed water that enters the fan impeller housing to be discharged through its own drainage port to prevent the formation of water accumulation. Another core of the present application is to provide a tertiary cooling system including the above-mentioned steam extraction pipeline drainage device.

[0020] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0021] In this embodiment, the steam extraction pipeline drainage device of the tertiary cooling system of the continuous casting billet, namely the steam extraction pipeline drainage device, comprises a water baffle 2, a drainage hole 3, and a drainage pipe 4. The water baffle is arranged on the last section of the steam extraction pipeline 1.

[0022] The last section of the steam extraction pipeline 1 is a horizontal section of the steam extraction pipeline close to the air inlet of the fan, and it should also be the lowest section of the steam extraction pipeline.

[0023] The water retaining plate 2 is arranged at the lowest point of the last section of the steam extraction pipeline 1, and is made of steel plate. It is fully welded to the last section of the steam extraction pipeline 1 on both sides and is anti-corrosive treated.

[0024] The above-mentioned drainage hole 3 corresponds to the size of the drainage pipe 4 and is slightly smaller than the outer diameter of the drainage pipe 4 to prevent the drainage pipe 4 from extending out of the drainage hole 3 and forming water accumulation near the drainage hole 3; the drainage hole 3 is set in the opposite direction of the airflow of the water retaining plate 2 and at the lowest point of the pipeline.

[0025] The above-mentioned drainage pipe 4 is discharged to other large-sized drainage pipes 5, and the connection with the last section of steam extraction pipeline 1 and other large-sized drainage pipes 5 is fully welded to prevent cooling water leakage. The material is steel pipe and anti-corrosion treatment is performed.

[0026] The other large-sized drain pipe 5 is a drain pipe for a tertiary cooling system on-site filter. Its specification is larger than that of the drain pipe 4 and can simultaneously meet the drainage needs of the on-site filter and the steam extraction pipeline drainage device.

[0027] Specifically, for a 6m long tertiary cooling system quick cooling box, the steam extraction fan air volume is 80000m 3 / h, when the specification of the fan air inlet duct is D1120×6, the wind shield is arranged near the fan air inlet, preferably at 0.5-1m, with a thickness of 6mm-8mm and a height of 80-120mm. It is made of steel plate and is fully welded on both sides at the connection with the last section of the steam extraction pipeline 1 and anti-corrosion treatment is performed. It is preferably installed before the installation of the last section of the steam extraction pipeline 1; the drain hole 3 is arranged in front of the wind shield 2, and the distance from the wind shield 2 is preferably 75-125mm. The diameter is slightly smaller than the drain pipe 4. After the installation of the drain pipe 4 is completed, the incision of the drain hole 3 and the nearby welds are anti-corrosion treated; the drain pipe 4 corresponds to the drain hole 3, preferably DN100 or DN125, and is made of steel pipe and anti-corrosion treated. It is fully welded with the last section of the steam extraction pipeline 1 and other large-size drain pipes 5, and the welds are anti-corrosion treated.

[0028] The device provided in this embodiment prevents most of the condensed water from entering the fan impeller casing by discharging most of the condensed water in the steam extraction pipe in advance, so that a small amount of condensed water that enters the fan impeller casing can be discharged through its own drain outlet, thereby solving the problem of water accumulation in the fan impeller casing, avoiding the problems of increased fan operating resistance and high power consumption caused by water accumulation, reducing air volume loss, and improving steam extraction effect.

[0029] In addition to the steam extraction pipe drainage device of the tertiary cooling system of the above-mentioned continuous casting billet, the present application also provides a tertiary cooling system including the steam extraction pipe drainage device of the tertiary cooling system of the above-mentioned continuous casting billet. Please refer to the prior art for the structure of other parts of the tertiary cooling system, which will not be repeated in this article.

[0030] The above is a detailed introduction to the tertiary cooling system of the continuous casting billet and the steam extraction pipeline drainage device provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A steam extraction pipeline drainage device for a tertiary cooling system of a continuous casting billet, characterized in that: The invention comprises a water retaining plate (2) arranged on the last section of the steam extraction pipeline (1), a drainage hole (3) in front of the water retaining plate (2), a drainage pipe (4), and other large-sized drainage pipes (5); the water retaining plate (2) is arranged at the lowest point of the last section of the steam extraction pipeline and is fully welded to the last section of the steam extraction pipeline; the drainage hole (3) corresponds to the size of the drainage pipe (4) and is slightly smaller than the outer diameter of the drainage pipe (4) to prevent the drainage pipe (4) from extending out of the drainage hole (3) and forming water accumulation near the drainage hole (3); the drainage hole (3) is arranged on the water retaining plate (2) ) in the opposite direction of the air flow, at the lowest point of the pipeline; the drainage pipe (4) is discharged to other large-sized drainage pipes (5), and the connection with the last section of the steam extraction pipeline (1) and other large-sized drainage pipes (5) should be fully welded; other large-sized drainage pipes (5) can be the drainage pipes of the filter on-site of the tertiary cooling system or other existing drainage pipes, and their specifications are larger than the drainage pipe (4), which can simultaneously meet the drainage needs of the original equipment and the steam extraction pipeline drainage device; when there are no other large-sized drainage pipes (5) nearby, the drainage pipe (4) can also drain water to the slag flushing ditch alone.

2. The steam extraction pipeline drainage device for the tertiary cooling system of the continuous casting billet according to claim 1, characterized in that: The water retaining plate (2) is made of steel plate and is subjected to anti-corrosion treatment.

3. The steam extraction pipeline drainage device for the tertiary cooling system of the continuous casting billet according to claim 1, characterized in that: The drainage pipe (4) is made of a steel pipe and is subjected to an anti-corrosion treatment.

4. A tertiary cooling system for continuous casting, comprising a steam extraction pipeline drainage device for the tertiary cooling system for continuous casting, characterized in that: The steam extraction pipeline drainage device for the tertiary cooling system of the continuous casting billet is the steam extraction pipeline drainage device for the tertiary cooling system of the continuous casting billet as claimed in any one of claims 1 to 3.

Images