CN202621438U - Self-cleaning stuck and plugged sieving device - Google Patents

Abstract

The utility model discloses a self-cleaning sticky screening equipment, which is mainly composed of a sieve frame, a sieve plate, an elastic brush, a brush plate and the like. The shape of the sieve plate is arc-shaped and made of wear-resistant steel. It is composed of multiple sets of sieve teeth with a shape close to "V" in parallel. Close to the inverted "V" shape, its size gradually increases from the inside to the outside, so the material is not easy to be stuck. When the elastic brush is working, it extends into the sieve gap to clean up the sticky material on the sieve plate, such as "poke", "dial" and "scrape". Multiple elastic brushes are regularly fixed on the arc-shaped brush plate through bolts, basically Ensure that each sieve gap has several elastic brushes, and the brush plate can move horizontally. When the elastic brush wears seriously, the distance between the brush plates can be adjusted horizontally so that the elastic brush can be reused. The utility model fundamentally solves the phenomenon of material sticking and material blocking to the screening equipment during the material screening process, realizes the self-cleaning function of the material during the screening process, and improves the screening efficiency.

Description

Self-cleaning sticky screening equipment

Technical field:

The utility model relates to the screening of materials such as coking industry, metallurgical industry and mines, in particular, it is a screening method for processing coking coal powder, sintering coal powder, pellets, lump ore, sintering ore, coke (grain), Screening equipment for limestone powder and other materials. The equipment has the function of automatic cleaning of sticking and blocking, and has the advantages of high screening efficiency, long service life, stability and reliability, low power consumption, low noise and convenient maintenance. the

Background technique:

In recent years, with the further development of technology in the coking industry and metallurgical industry, improving the quality of coke and reducing the consumption of solid fuel for sintering have become an important part of the company's implementation of the national energy-saving and emission-reduction policy, and it has received more and more attention from the majority of technical workers. It is also a difficult problem for the majors of coking, sintering and ironmaking. For coking production, optimizing coal blending structure is undoubtedly the main way to improve coke quality. With the improvement of the coking process, the selective crushing process of blended coal has attracted widespread attention in the coking industry in recent years. This technology is to classify the blended coal before charging the furnace under certain conditions of the coal blending structure, and the particles are coarse, specific, and ash. The high-grade coal powder is crushed repeatedly to achieve a reasonable particle size, so that the properties of coal powder with different particle sizes are closer, and the particle size distribution and fineness of the furnace coal are reasonable, thereby improving the coke production and quality. However, in actual coking production, this technology has not been widely used due to the limitation of grading equipment. Due to the small proportion of pulverized coal and high moisture, the sieve holes of traditional screening equipment are easily blocked to death by paste, and the screening efficiency is extremely low. However, the pneumatic selective crushing technology imported from abroad has large investment, high operating cost and high failure rate. , and there are strict requirements on the moisture content of the selected coal powder, etc., which limit the direct promotion of this process. For sintering, the particle size composition of solid fuel has a great influence on the quality of sinter. When the particle size of the fuel is too pulverized, the pulverized coal burns too fast, and the high temperature of the sinter layer is kept for a short time, which is not conducive to the full consolidation of the binder phase. And the formation of calcium ferrite, at the same time -0.5mm particle size coal powder is easy to be sucked away by the ventilation system, resulting in energy waste. As far as ironmaking is concerned, reducing the powder content in the blast furnace charge has attracted more and more attention from the majority of ironworkers. If a large amount of powder enters the furnace, it will block the gaps in the material column in the block belt, resulting in poor air permeability of the blast furnace and pressure. The difference rises, and in severe cases, material collapse occurs, resulting in abnormal gas loss, an increase in coke ratio, and a decrease in output. For blast furnace screening, the most difficult thing is the screening of lump ore. Since the lump ore enters the factory, its water content is relatively large and its powder content is high. It is easy to stick to the existing screening equipment and block the sieve hole. Very low efficiency. the

Invention content:

The technical problem to be solved by the utility model is to solve the problems existing in the material screening process, focusing on solving the serious phenomenon of sticky material and material blocking in the screen hole of the screening equipment, improving the screening efficiency of the material, and realizing the selective crushing of coking mixed coal, Pre-screening of sintered coal powder, blast furnace concentrate and other technologies can further improve the particle size composition of coking coal, make the change of coal quality of each particle size tend to be uniform, and reduce the content of -0.5mm particle size in sintered solid fuel and reduce the content of blast furnace charge. Powder rate, and ultimately achieve the purpose of increasing coke M40, post-reaction strength and reducing reactivity, reducing energy consumption and improving quality of sintered solids, as well as improving the air permeability of blast furnace material column, reducing blast furnace coke ratio and increasing production. the

The technical scheme that the utility model takes is:

Through the research and analysis of the screening characteristics of powdery and massive materials, due to the characteristics of fine particles, small specific gravity, poor dispersibility and high water content of powdery materials, it is easy to cause sieve holes of the screening equipment during the screening process. Blocking phenomenon, the screening efficiency is extremely low. The utility model adopts a brand-new way of thinking focusing on the sieving characteristics of powdery and massive materials, and adopts a rolling sieving method to sieve materials. The sieve frame is in the shape of a cylinder or a round platform, and the sieve plate is fixed on On the frame, the elastic brush cleans the sieve plate online in real time during the sieving process. First of all, make bold innovations in the screening equipment, use the circular roller screen to replace the existing vibrating screen or pneumatic grading equipment, and change the movement mode and running track of the material during the screening process through the improvement of the screening equipment, so that the material It can be fully dispersed during the screening process; secondly, for screening equipment, whether it is a vibrating screen or a rotary sieve, there will be paste and blockage of the screen holes. Another innovation of the utility model is that it is specially designed for paste blockage The elastic brush is used to clean the screen holes blocked by paste in real time, and the structure of the sieve plate is reasonably designed according to the working principle of the elastic brush. The sieve holes are arc-shaped and long. During the separation process, the accumulated material at the sieve gap can be constantly subjected to force such as "poke", "dial" and "scrape" by the elastic brush. Therefore, the sieve gap is not easy to be blocked by the material paste, and the sieve hole is always kept clean unimpeded. the

Description of drawings:

Figure 1 is a schematic diagram of the self-cleaning sticky screening equipment. the

Fig. 2 is a schematic diagram of arrangement of elastic brushes and brush plates. the

Figure 3 is a schematic diagram of the structure of the sieve plate. the

Fig. 4 is a structural schematic diagram of a spring-type elastic brush. the

Compared with the traditional method, the utility model has the following advantages:

1. The utility model fundamentally solves the phenomenon of sticky blocking of screening equipment during the material screening process, especially when dealing with the screening of coal powder with small specific gravity and high moisture content, its effect is more significant than traditional screening equipment. By changing the movement mode and running track of the materials during the screening process, it promotes the materials to be fully dispersed, and uses the real-time online cleaning function of the elastic brush to completely overcome the technical problem of sticking the sieve holes. the

2. This utility model is beneficial to the realization of coking coal selection crushing process and sintering coal powder pre-screening technology, so as to improve the particle size composition of coking coal, make the change of coal quality of each particle size tend to be uniform, and reduce the sintering solid fuel. Medium-0.5mm particle size content, to achieve the purpose of increasing coke M40, post-reaction strength and reducing reactivity, reducing energy consumption of sintered solids, and improving sinter quality. the

3. The utility model can realize quenching and tempering treatment of sintered ore and coke during the screening process. Due to the mutual friction between materials during screening, the "burrs" on the surface of sinter and coke are all removed. After screening by this equipment, the drum index, anti-wear index and coke M40 and M10 indexes of sinter will all be reduced. significantly improved. the

4. The equipment of this utility model has the function of automatically cleaning up sticking, and has the advantages of high screening efficiency, long service life, stability and reliability, low power consumption, low noise and convenient maintenance. the

Detailed ways:

The equipment structure of the utility model is mainly composed of sieve frame (1), sieve plate (2), elastic brush (3), brush plate (4), reducer (5), motor (6) and other components (see the accompanying drawings figure 1). Among them, the screen frame is composed of a plurality of rolling rings (7) and beams (8), and its shape is in the shape of a cylinder or a round table. Rotation, the speed is determined according to the calculation of the material filling rate, screening time, production capacity and other parameters; The teeth (11) are combined in parallel, the shape of the teeth is close to "V" shape, the sieve slot is long and arc-shaped and perpendicular to the axis of the rolling screen, the shape is close to an inverted "V" shape, and its size gradually increases from inside to outside Therefore, the material is not easy to be stuck, and the sieve plate is fixed on the beam by bolts. Elastic brush is made by elastic steel wire, has two kinds of structural forms, and a kind of structure is spring type structure (see accompanying drawing Fig. 4 of specification sheet), and its one end is spring shape (13), and the other end is linear shape (12), When working, the straight end extends into the sieve gap for cleaning; the other structure is a linear structure. The elasticity and deformation of the elastic brushes need to be determined according to the precise calculation of the force of the material "poke", "dial" and "scrape" during screening. Multiple elastic brushes are regularly fixed on the arc-shaped brush plate by bolts , It is basically guaranteed that there are several elastic brushes in each sieve gap, and the brush plate can move horizontally. When the elastic brush wears seriously, the distance between the brush plates can be adjusted horizontally to make the elastic brush reusable. There are two types of elastic brushes: fixed and rotary. the

Claims (6)

1. Self-cleaning sticky screening equipment, characterized in that: the material is screened by rolling screening, the screen frame is in the shape of a cylinder or a round table, the screen plate is fixed on the screen frame, and the elastic brush is in the screening process. Real-time online cleaning of the sieve plate. 2. The self-cleaning sticky screening equipment as claimed in claim 1, characterized in that: the shape of the sieve plate is arc-shaped, made of wear-resistant steel, the sieve seam is long arc-shaped and connected with the roller sieve shaft vertically. 3. The self-cleaning sticky screening equipment as claimed in claim 2, characterized in that: the sieve plate is composed of multiple groups of sieve teeth in parallel, the shape of the sieve teeth is close to "V" shape, and the shape of the sieve slot is close to an inverted "V" type. 4. The self-cleaning sticky screening equipment as claimed in claim 1, characterized in that: the elastic brush is made of elastic steel wire and has two structural forms, one is a spring structure, one end of which is in the shape of a spring, And the other end is a straight line shape, and the straight end stretches into the sieve gap for cleaning during work, and the other structure is a straight line structure. 5. The self-cleaning sticky screening equipment as claimed in claim 4, characterized in that: a plurality of elastic brushes are regularly fixed on the brush plate through bolts, basically ensuring that each sieve gap has several elastic brushes, and the elastic brushes There are two working methods: fixed and rotary. 6. The self-cleaning sticky screening equipment according to claim 5, characterized in that the brush plate can move horizontally, and when the elastic brush wears seriously, the distance between the brush plate can be adjusted horizontally so that the elastic brush can be reused. the

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