CN216538942U

CN216538942U - Double-roller magnetic filter for cleaning section degreasing fluid purification

Info

Publication number: CN216538942U
Application number: CN202122355448.3U
Authority: CN
Inventors: 兰昊天; 岳重祥; 宋乙峰; 徐晓涵
Original assignee: Jiangsu Shagang Group Co Ltd; Jiangsu Shagang Iron and Steel Research Institute Co Ltd; Zhangjiagang Yangzijiang Cold Rolled Sheet Co Ltd
Current assignee: Jiangsu Shagang Group Co Ltd; Jiangsu Shagang Iron and Steel Research Institute Co Ltd; Zhangjiagang Yangzijiang Cold Rolled Sheet Co Ltd
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-05-17
Anticipated expiration: 2031-09-28

Abstract

The utility model discloses a double-roller magnetic filter for purifying degreasing fluid in a cleaning section, which comprises: two magnetic filter rollers which rotate relatively, a matched iron mud scraper, sealing baffles on two sides of the magnetic filter rollers, a flow distribution device, a filtrate storage tank, two iron mud storage tanks, a reflux device, a corresponding baffle pressing device and a magnetic filter roller driving device. And distributing the degreasing fluid to be filtered between the two magnetic filtering rollers which rotate relatively, so that the degreasing fluid is directly contacted with the magnetic filtering rollers at a short distance, and the thorough adsorption of the iron powder is realized. The utility model can effectively avoid the problem of iron mud deposition while improving the efficiency of adsorbing iron powder and promote the better recycling of degreasing fluid in a system.

Description

Double-roller magnetic filter for cleaning section degreasing fluid purification

Technical Field

The utility model belongs to the technical field of cold-rolled steel treatment, and relates to a double-roller magnetic filter suitable for purifying degreasing fluid in a cleaning section of a cold-rolled galvanizing or continuous annealing unit.

Background

So far, most strip cold rolling mills in the world use circulating emulsion as the process lubrication and cooling medium for the rolling process. During the metal rolling process, a large amount of iron powder is generated on the surface of the steel plate due to severe friction. In order to ensure the quality of finished products, when galvanizing or continuous annealing production is carried out, the rolled hard coil with the emulsion and the iron powder left on the surface must be degreased and cleaned firstly, and then the rolled hard coil can enter an annealing furnace for annealing. In the degreasing and cleaning process, iron powder on the surface of the hard rolling coil enters degreasing liquid; in order to prevent secondary pollution, the degreasing liquid is filtered during external circulation to remove iron powder, and the relatively clean degreasing liquid is returned to the degreasing tank for continuous use. The common plate of the domestic and foreign galvanizing or continuous annealing unit adopts a magnetic filter to remove iron powder. For example, the utility model patent with the application number of 201811209521.2 discloses a magnetic bar rotation type permanent magnet filtering device, wherein a magnetic chain periodically and repeatedly enters below the liquid level of a box body for storing cold rolling cooling liquid under the driving of a motor transmission mechanism, so that iron powder in the cooling liquid is adsorbed; the utility model patent with the application number of 201811562770.X makes a plurality of magnetic chains move linearly through a main transmission system and an auxiliary transmission system on the basis of a magnetic bar rotation type permanent magnet filtering device, so that the whole overflowing cross section of an oil tank is completely contained, and the recovery speed of iron powder is improved. The existing magnetic filter realizes the adsorption of iron powder by immersing the magnetic chain in degreasing fluid, and because the magnetic bar can not be fully contacted with all liquid in the box body, the filtering effect is difficult to be effectively ensured when the flow rate of circulating liquid is increased.

Disclosure of Invention

In order to ensure the filtering effect of the magnetic filter during high-speed production, the utility model provides a double-roller magnetic filter which is suitable for purifying degreasing fluid in a cleaning section of a cold-rolling galvanizing or continuous annealing unit. And distributing the degreasing fluid to be filtered between the two magnetic filtering rollers which rotate relatively, so that the degreasing fluid is directly contacted with the magnetic filtering rollers at a short distance, and the thorough adsorption of the iron powder is realized.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows: the magnetic filter includes: the device comprises a magnetic filter roller, an iron mud scraper, a sealing baffle, a flow distribution device, a filtrate storage tank, an iron mud storage tank, a reflux device, a baffle pressing device, a driving device, a magnetic rod and a filter tank; the center of each of the two magnetic filtering rollers is provided with a driving device, a plurality of magnetic rods are uniformly distributed in the magnetic filtering rollers close to the surface, and the outer surfaces of the magnetic filtering rollers are fixedly connected with iron mud scraping plates and tangent to the outer surfaces of the magnetic filtering rollers; the sealing baffle is tightly connected with two end faces of the magnetic filter roller through a baffle pressing device, and a filter tank is formed between the magnetic filter roller and the sealing baffle; the iron mud storage tanks are positioned at two sides of the filtrate storage tank and below the iron mud scraper; and a reflux device is connected below the filtrate storage tank.

Further, the roll gap between the two magnetic filter rolls can be adjusted through a magnetic filter roll driving device, and the size of the roll gap is 0.5 mm-50 mm. The filtering speed can be controlled by adjusting the size of the roll gap.

Furthermore, the rotating speeds of the two magnetic filtering rollers can be adjusted through a magnetic filtering roller driving device, and the rotating speed is 1-100 r/min. The filtering speed can be controlled by adjusting the rotating speed.

Preferably, the flow distribution device is a single tubular nozzle.

Preferably, the height of the sealing baffle is more than or equal to the diameter of the magnetic filter roller, and the width of the sealing baffle is more than or equal to the diameter of the magnetic filter roller plus the maximum roll gap.

Preferably, the magnetic rods are round rods or square rods, the distance between the magnetic rods and the surface of the magnetic filter roller is less than or equal to 10mm, and the distance between the magnetic rods is less than or equal to the diameter or side length of the magnetic rods.

Compared with the prior art, the utility model has the advantages that:

the double-roller magnetic filter suitable for alkali liquor purification of the cleaning section of a cold-rolling galvanizing or continuous annealing unit provided by the utility model has the advantages that the iron powder adsorption efficiency is improved, the problem of iron mud deposition is effectively avoided, and the degreasing liquid is promoted to be better recycled in a system.

Drawings

In order to more clearly illustrate the embodiments of the present application 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, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a front view of a two-roll magnetic filter according to the present invention.

Fig. 2 is a top view of a two-roll magnetic filter according to the present invention.

Reference numerals: 1-magnetic filter roll, 2-iron mud scraper, 3-sealing baffle, 4-flow distribution device, 5-filtrate storage tank, 6-iron mud storage tank, 7-reflux device, 8-baffle pressing device, 9-magnetic filter roll driving device, 10-magnetic bar and 11-filter tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

The double-roller magnetic filter is suitable for a cold-rolling galvanizing or continuous annealing unit with the annual output of 30-50 ten thousand tons and the maximum product width of 1250mm, and is used for purifying degreasing fluid at a cleaning section.

As shown in fig. 1 and 2, a two-roll magnetic filter for purifying degreasing fluid in a cleaning section comprises: two magnetic filter rolls 1 which rotate relatively, and a matched iron mud scraper 2, a sealing baffle 3, a flow distribution device 4, a filtrate storage tank 5, two iron mud storage tanks 6, a reflux device 7, a corresponding baffle pressing device 8 and a magnetic filter roll driving device 9.

Wherein the diameter of the magnetic filter roller 1 is 750mm, and the length is 1250 mm; the height of the sealing baffle 3 is 800mm, and the width is 830 mm. The sealing baffle 3 is tightly combined with the two end surfaces of the magnetic filter roller 1 through the baffle pressing device 8, and a filter tank 11 is formed between the sealing baffle 3 and the magnetic filter roller 1. After the degreasing fluid to be filtered flows to the filter tank 11, the distance between the degreasing fluid and the magnetic filter rollers 1 is continuously reduced along with the rotation of the magnetic filter rollers 1, and finally the degreasing fluid enters the filter fluid storage tank 5 after passing through the roll gaps of the two magnetic filter rollers 1. In the process, the minimum distance between the magnetic filter roll 1 and all the flowing degreasing fluid is 1/2 roll gaps, so that the contact is sufficient, and the iron powder in the degreasing fluid can be fully adsorbed.

The positions of the inner part of each magnetic filter roller 1, which are close to the surface, are uniformly distributed with 25 magnetic rods 10 with the diameter of 50mm, and the distance between the magnetic rods and the surface is 6 mm.

Each magnetic filter roller 1 is provided with a magnetic filter roller driving device 9 for adjusting a roller gap between the two magnetic filter rollers 1 and the rotating speed of the two magnetic filter rollers, the roller gap adjusting range is 0.5-30 mm, and the rotating speed adjusting range is 5-50 r/min. In actual production, the roll gap and the rotating speed of the magnetic filtering roll 1 are adjusted according to the flow of the degreasing fluid to be filtered in the flow distribution device 4, so that the high-efficiency operation of the magnetic filtering device is ensured.

In addition, the flow distribution device 4 adopts a tubular single water gap design, an iron mud scraper 2 is arranged at the outer side of the two magnetic filter rollers 1, and a filtrate storage tank 5 and two iron mud storage tanks 6 are arranged below the iron mud scraper; iron mud hold up tank 6 is located 5 both sides of filtrate hold up tank to be in iron mud scraper blade 2 below, iron mud scraper blade 2 is tangent with 1 surface of magnetic filter roller for scrape into iron mud hold up tank 6 with adsorbed iron mud, iron powder etc. on the magnetic filter roller of rotation, reflux unit 7 is connected to filtrate hold up tank 5 below and is used for the backward flow cyclic utilization of degreasing fluid.

The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.

Claims

1. A two-roll magnetic filter for cleaning of spent wash liquor, said filter comprising: the device comprises a magnetic filter roller (1), an iron mud scraper (2), a sealing baffle (3), a flow distribution device (4), a filtrate storage tank (5), an iron mud storage tank (6), a reflux device (7), a baffle pressing device (8), a driving device (9), a magnetic rod (10) and a filter tank (11); a pair of magnetic filtering rollers (1) is arranged below the flow distribution device (4), a driving device (9) is arranged at the center of each magnetic filtering roller (1), the driving device (9) is connected with a baffle pressing device (8), a plurality of magnetic rods (10) are uniformly distributed at the positions, close to the edges, in each magnetic filtering roller (1), the outer surface of each magnetic filtering roller (1) is provided with an iron mud scraper (2) and is tangent to the outer surface of each magnetic filtering roller (1); the sealing baffle (3) is tightly connected with two end faces of the magnetic filter roller (1) through a baffle pressing device (8), and a filter tank (11) is formed between the magnetic filter roller (1) and the sealing baffle (3); a filtrate storage tank (5) is arranged below the filtering tank (11), and the iron mud storage tanks (6) are positioned on two sides of the filtrate storage tank (5) and below the iron mud scraper (2); and a reflux device (7) is connected below the filtrate storage tank (5).

2. The double-roller magnetic filter for cleaning section degreasing fluid purification according to claim 1, wherein the diameter of the magnetic filter roller (1) is 400-1500 mm, and the length of the magnetic filter roller is 500-2500 mm; the size of the roll gap between the two magnetic filtering rolls is 0.5-50 mm, and the rotating speed between the two magnetic filtering rolls is 1-100 r/min.

3. A two-roll magnetic filter for cleaning section degreasing fluid purification according to claim 1, wherein the flow distribution device (4) is a single tubular nozzle.

4. The double-roller magnetic filter for cleaning section degreasing fluid purification as claimed in claim 1, wherein the height of the sealing baffle is larger than or equal to the diameter of the magnetic filter roller, and the width of the sealing baffle is larger than or equal to the diameter of the magnetic filter roller plus the maximum roll gap.

5. The double-roller magnetic filter for purifying the degreasing fluid in the cleaning section is characterized in that the magnetic rods (10) are round rods or square rods, the distance between the magnetic rods (10) and the surface of the magnetic filter roller (1) is less than or equal to 10mm, and the distance between the magnetic rods is less than or equal to the diameter or the side length of the magnetic rods.