A dust removal device for rolling mill

Abstract

The utility model relates to a rolling mill dust collector belongs to dust collector's technical field. The rolling mill dust collector, including the dust absorption cover one and the dust absorption cover two of the entrance of the installation in the rolling mill, the exit, the dust absorption cover one and the dust absorption cover two are communicated with the entrance of filter equipment through dust absorption pipe, the dust absorption cover one and the dust absorption cover two are equipped with fan one and fan two respectively, the entrance of filter equipment is equipped with buffer chamber, and the buffer chamber gradually increases along the gas flow direction cross section area, the top of filter equipment is equipped with a plurality of shower nozzles, the bottom of filter equipment is equipped with sewage channel. The utility model can effectively collect the smoke and dust generated by rolling mill. After filter equipment, the fine particle in the smoke and dust contacts water mist, and settles to the bottom of filter equipment, and is discharged into the sewage pool through sewage channel. The dust content in dust emission chimney is less than or equal to 50mg / m 3 ; the rolling mill site closed management space has no dust escape, and the dust suppression rate reaches 96%.

Description

Technical Field

[0001] This utility model relates to the technical field of dust removal devices, specifically to a dust removal device for a rolling mill. Background Technology

[0002] Rolling: A pressure processing method in which metal billets are passed through the gap between a pair of rotating rolls. The compression of the material by the rolls reduces its cross-section and increases its length. This is the most common production method for steel, mainly used to produce profiles, plates, and pipes. It is divided into hot rolling and cold rolling. Hot rolling is performed above the recrystallization temperature of the metal. During the rolling process, a thin layer of iron oxide scale forms on the surface of the workpiece. When the rolls encounter cooling water, the fine iron oxide scale particles are carried by the hot airflow, generating a large amount of iron oxide dust and water vapor that floats above the mill. Dust formation has a significant impact on the operating environment, mainly in the following aspects:

[0003] (1) It has a certain impact on the stable operation of the equipment. It accumulates on the cable joints or motor fan coolers, which has a certain impact on the electrical system.

[0004] (2) It affects equipment inspection and maintenance; the accumulation of dust and oil makes it impossible for equipment inspectors to distinguish the true technical condition of the equipment.

[0005] (3) There is a lot of dust around the rolling mill site, which is difficult to clean and has a significant impact on site management.

[0006] (4) There is a lot of dust, which can easily cause harm to on-site operators.

[0007] Due to the complex structure of rolling mill units, there is currently no dedicated dust removal device to control the dust generated by rolling mill units. Therefore, it is necessary to design and research a new type of dust removal device for rolling mill units to solve the above problems. Utility Model Content

[0008] In view of the fact that there is no dedicated dust removal device for the dust generated by existing rolling mill units, this utility model provides a rolling mill dust removal device to solve the above problem.

[0009] This utility model provides a dust removal device for a rolling mill, including a dust suction hood one installed at the inlet of the rolling mill and a dust suction hood two installed at the outlet; the dust suction hood one and the dust suction hood two are connected to the inlet of a filter device through a dust suction pipe; the dust suction hood one and the dust suction hood two are respectively equipped with a fan one and a fan two; the inlet of the filter device is provided with a buffer chamber, the cross-sectional area of ​​which gradually increases along the gas flow direction; the top of the filter device is provided with multiple spray heads; the bottom of the filter device is provided with a sewage channel.

[0010] Furthermore, the filtration device is equipped with multiple sets of air distribution components; each set consists of multiple parallel air distribution plates; each set is positioned between adjacent spray heads; the air distribution plates are all angled, and adjacent sets of air distribution components face opposite directions. When dust-laden gas enters the buffer chamber, the space expands, and the air velocity decreases. By using the air distribution plates, the path of the flue gas within the filtration device is lengthened. Simultaneously, the air distribution plates also disperse the water mist sprayed from the spray heads, ensuring more thorough contact between the flue gas and the water mist.

[0011] Furthermore, the sewage channel is connected to the sewage tank via a pipe.

[0012] Furthermore, the first fan is an axial flow fan. Considering that the first dust hood is located at the farthest end of the equipment and the flue gas pressure is low, an axial flow fan is selected to balance the air volume and ensure the dust removal effect.

[0013] Furthermore, the second fan is a centrifugal fan with a processing air volume of 40,000 m³. 3 / h, generating a wind speed of more than 20 meters per second, sending the smoke and dust into the filtration device, and then discharging the filtered smoke and dust into the sewage tank.

[0014] Furthermore, the centrifugal fan adopts a frequency converter, which ensures smooth start-up and adjustable air volume. The impeller of the centrifugal fan is equipped with an atomizing water spray device to solve the problem of dust adhesion on the rotor.

[0015] Furthermore, both the first and second dust hoods are made of stainless steel and have a thickness of 2mm.

[0016] The working principle of this invention is as follows: Rolling mill dust is generated by the extrusion of steel billets into and out of the mill, forming iron oxide scale, water vapor, and oil fumes. Due to the high temperature of the dust and smoke, the rising airflow causes it to diffuse downwards. During the rolling of the steel billet, the mill instantly generates a large amount of red smoke, and the airflow rises. Therefore, dust extraction hoods one and two are installed at the inlet and outlet of the rolling mill. After the fan is turned on, the dust is sucked into the suction pipe and enters the filtration device. A buffer chamber is installed at the inlet of the filtration device. The cross-sectional area of ​​the buffer chamber gradually increases along the gas flow direction. As the dust-laden gas enters the buffer chamber, the space becomes larger, and the wind speed decreases. The water mist sprayed from the spray head envelops the dust, causing it to settle and flow into the wastewater tank at the bottom of the filtration device, and then be discharged into the wastewater pool through the wastewater channel. The purified flue gas then enters the exhaust pipe for further treatment.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention effectively collects the dust generated by the rolling mill by installing dust collection hoods at the inlet and outlet. After passing through a filtration device, fine particles in the dust come into contact with water mist, settle to the bottom of the filtration device, and are discharged into a wastewater tank through a wastewater channel. Testing shows that the dust content in the exhaust chimney is ≤50mg / m³. 3The closed-loop treatment space at the rolling site prevents dust from escaping, significantly improving the surrounding environment with a dust suppression rate of 96%. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the filtration device of this utility model.

[0022] In the diagram, 1-Dust hood one, 2-Dust hood two, 3-Rolling mill, 4-Dust suction pipe, 5-Fan one, 6-Fan two, 7-Filter device, 8-Buffer chamber, 9-Spray head, 10-Air distribution plate, 11-Sewage channel, 12-Sewage pool. Detailed Implementation

[0023] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0024] Example 1

[0025] This utility model provides a dust removal device for a rolling mill, including a dust suction hood 1 at the inlet of the rolling mill 3 and a dust suction hood 2 at the outlet; the dust suction hood 1 and the dust suction hood 2 are connected to the inlet of a filter device 7 through a dust suction pipe 4; the dust suction hood 1 and the dust suction hood 2 are respectively equipped with a fan 5 and a fan 6; the inlet of the filter device 7 is provided with a buffer chamber 8, the cross-sectional area of ​​the buffer chamber 8 gradually increases along the gas flow direction; the top of the filter device 7 is provided with multiple spray heads 9; the bottom of the filter device 7 is provided with a sewage channel 11.

[0026] Example 2

[0027] This utility model provides a dust removal device for a rolling mill, including a dust suction hood 1 at the inlet of the rolling mill 3 and a dust suction hood 2 at the outlet; the dust suction hood 1 and the dust suction hood 2 are connected to the inlet of a filter device 7 via a dust suction pipe 4; the dust suction hood 1 and the dust suction hood 2 are respectively equipped with a fan 5 and a fan 6; a buffer chamber 8 is provided at the inlet of the filter device 7, the cross-sectional area of ​​the buffer chamber 8 gradually increases along the gas flow direction; multiple spray heads 9 are provided on the top of the filter device 7; multiple sets of air distribution components are provided inside the filter device 7; each set of air distribution components consists of multiple parallel air distribution plates 10; each set of air distribution components is located between adjacent spray heads 9; the air distribution plates 10 are all obliquely arranged, and the directions of adjacent sets of air distribution components are opposite; a sewage channel 11 is provided at the bottom of the filter device 7, and the sewage channel 11 is connected to a sewage tank via a pipe. The fan 1 is an axial flow fan; the fan 2 is a centrifugal fan with a processing air volume of 40,000 m³. 3 The centrifugal fan generates a wind speed greater than 20 meters per second, sending the smoke and dust into the filtration device. After filtration, the smoke and dust are discharged into the sewage tank. The centrifugal fan uses a frequency converter. The water spray volume of the spray head 9 in the filtration device 7 can be adjusted according to the air volume of the second fan 6. When the amount of smoke and dust at the mill inlet and outlet increases, the air intake volume of the second fan 6 also increases, and the water supply of the spray head is adjusted synchronously. The first and second dust suction hoods are made of stainless steel with a thickness of 2mm.

[0028] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dust removal device for a rolling mill, comprising a dust collection hood one installed at the inlet of the rolling mill and a dust collection hood two installed at the outlet; characterized in that, The first and second dust collection hoods are connected to the inlet of the filter device via a dust collection pipe; the first and second dust collection hoods are respectively equipped with a first fan and a second fan; the inlet of the filter device is equipped with a buffer chamber, the cross-sectional area of ​​which gradually increases along the gas flow direction; the top of the filter device is equipped with multiple spray heads; the bottom of the filter device is equipped with a sewage channel.

2. The dust removal device for a rolling mill as described in claim 1, characterized in that, The filtration device is equipped with multiple sets of air distribution components; each set of air distribution components consists of multiple parallel air distribution plates; each set of air distribution components is located between adjacent spray heads.

3. A dust removal device for a rolling mill as described in claim 2, characterized in that, The air distribution plates are all angled, and the directions of each adjacent group of air distribution components are opposite.

4. A dust removal device for a rolling mill as described in claim 1, characterized in that, The sewage channel is connected to the sewage tank via a pipe.

5. A dust removal device for a rolling mill as described in claim 1, characterized in that, The first type of fan is an axial flow fan.

6. A dust removal device for a rolling mill as described in claim 1, characterized in that, The second fan is a centrifugal fan with a processing air volume of 40,000 m³. 3 / h.

7. A rolling mill dust removal device as described in claim 6, characterized in that, The centrifugal fan uses a frequency converter and the fan impeller is equipped with an atomizing water spray device.

8. A dust removal device for a rolling mill as described in claim 1, characterized in that, The first and second dust hoods are made of stainless steel and are 2mm thick.

Images