阅读说明：本技术 一种防堵耐磨回收高炉煤气粉尘设备 (Anti-blocking wear-resistant blast furnace gas dust recycling equipment ) 是由 胡伟 曹朝真 王智政 陈玉敏 于 2021-09-26 设计创作，主要内容包括：一种防堵耐磨回收高炉煤气粉尘设备,属于工业气体除尘技术领域。本发明主要解决设备磨损,减少高炉因煤气除尘设备堵塞和磨漏而休风的次数。本发明包括进气管、切分室、螺旋通道、分离室、集灰室、出气管、卸灰室；切分室由中心插入件和分隔筛板组成,分隔筛板的数量为1-2,与进气管和回收高炉煤气粉尘设备中心所在竖直平面的夹角γ为0-15°；螺旋通道数量为2-3,通道横截面由半圆形逐渐改为长方形；集灰室由渐缩管和抑尘器组合而成；插入件横截面形状为倒V形,外表面镶嵌有耐磨耐冲击陶瓷材料；卸灰室安装有防堵器,防堵器表面设有卸灰孔；本发明能够优化含尘气体在回收设备内粒度分布,显著提高除尘效率,降低设备磨损,减少堵塞次数,提高设备寿命。(An anti-blocking wear-resistant blast furnace gas dust recovery device belongs to the technical field of industrial gas dust removal. The invention mainly solves the problem of equipment abrasion and reduces the damping down times of the blast furnace caused by the blockage and the abrasion leakage of the coal gas dust removal equipment. The invention comprises an air inlet pipe, a cutting chamber, a spiral channel, a separation chamber, an ash collecting chamber, an air outlet pipe and an ash discharging chamber; the cutting chamber consists of a central insert and separating sieve plates, the number of the separating sieve plates is 1-2, and the included angle gamma between the separating sieve plates and the vertical plane where the gas inlet pipe and the center of the blast furnace gas dust recovery equipment are located is 0-15 degrees; the number of the spiral channels is 2-3, and the cross section of each channel is gradually changed from a semicircle to a rectangle; the dust collecting chamber is formed by combining a reducing pipe and a dust suppressor; the cross section of the insert is in an inverted V shape, and the outer surface of the insert is embedded with a wear-resistant impact-resistant ceramic material; the ash discharging chamber is provided with an anti-blocking device, and the surface of the anti-blocking device is provided with an ash discharging hole; the invention can optimize the particle size distribution of the dust-containing gas in the recovery equipment, obviously improve the dust removal efficiency, reduce the equipment abrasion, reduce the blocking times and prolong the service life of the equipment.)

1. The utility model provides a prevent stifled wear-resisting recovery blast furnace gas dust equipment which characterized in that: the blast furnace gas dust recovery equipment comprises a gas inlet pipe, a splitting chamber, a spiral channel, a separation chamber, an ash collecting chamber, a gas outlet pipe and an ash discharging chamber; the vertical section of the air inlet pipe is connected with the upper conical section of the shell of the blast furnace gas and dust recovery equipment, the air inlet pipe is connected with the separation sieve plate in the cutting chamber, and the central insert in the cutting chamber is respectively connected with the air outlet pipe of the vertical section and the air outlet pipe of the horizontal section; a spiral channel is arranged on the outer side of the vertical section of the air outlet pipe, and a separation chamber, an ash collection chamber and an ash discharge chamber are sequentially arranged below the spiral channel; an anti-blocking device is arranged at the bottom of the ash discharging chamber, and ash discharging holes are formed in the surface of the anti-blocking device.

2. The blast furnace gas dust recovery equipment according to claim 1, wherein the separating sieve plate is a part of the side surface of the circular truncated cone formed by the lower edge of the vertical section of the gas inlet pipe and the upper edge of the gas outlet pipe of the vertical section; the number of the separating sieve plates is 1 or 2.

3. The blast furnace gas dust recovery apparatus according to claim 2, wherein the angle γ between the partition screen plate and the vertical plane in which the gas inlet pipe and the center of the blast furnace gas dust recovery apparatus are located is 0 to 15 °.

4. The blast furnace gas dust recovery apparatus according to claim 1, wherein the cross-sectional shape of the spiral channel is gradually changed from a semicircular shape to a rectangular shape; the upper part of the spiral channel is a vertical section, the lower part of the spiral channel is a spiral section, and the spiral section should avoid the lower edge of the air outlet pipe of the horizontal section; the section of the vertical section of the spiral channel is fan-shaped, and the section of the spiral section is fan-shaped or rectangular; the central angle swept by the spiral section of the spiral channel is 180-450 degrees.

5. The blast furnace gas dust recovery apparatus according to claim 4, wherein the number of the spiral passages is 2 or 3.

6. The blast furnace gas dust recovery apparatus according to claim 1, wherein the dust collecting chamber is composed of a reducer and a dust suppressor; a dust suppressor is arranged outside the convergent pipe.

7. The blast furnace gas dust recycling apparatus of claim 6, wherein the included angle between the reducer generatrix and the centerline of the blast furnace gas dust recycling apparatus is α, α being larger than the natural stacking angle of the dust; the included angle between the generatrix of the dust suppressor and the central line of the blast furnace gas dust recovery equipment is beta, and the included angle alpha and the angle beta of the dust suppressor are mutually matched.

8. The blast furnace gas dust recovery apparatus according to claim 1, wherein the central insert has an inverted V-shaped cross-sectional shape; the upper surface of the central insert is covered with a wear-resistant layer.

9. The blast furnace gas dust recovery apparatus according to claim 1, wherein the shape of the dust discharge hole is circular or elliptical.

Technical Field

The invention belongs to the technical field of industrial gas dust removal, and particularly relates to anti-blocking wear-resistant equipment for gas-solid separation and recovery of dust-containing gas in the industrial fields of metallurgy, chemical industry and the like, particularly blast furnace gas.

Background

At present, a dry dust removal process is generally adopted for blast furnace gas dust removal, in order to reduce the ash load of the dry dust removal and reduce the influence on a cloth bag and subsequent processes, a process form of a gravity dust remover, a cyclone dust remover and the dry dust removal is generally adopted, the dust removal efficiency of the gravity dust remover is low and is generally 50-60%, and the dust removal efficiency of the cyclone dust remover has great influence on the service life of the cloth bag and the dust removal effect of gas. The existing blast furnace gas cyclone dust collector mainly has two forms, namely a tangential cyclone dust collector for tangentially feeding air and discharging air from the top, and an axial cyclone dust collector for axially (top) feeding air and laterally discharging air.

Patent CN 1327482 a discloses a "dust removing device for blast furnace gas", which includes a large cyclone separator, which has a vertical pressure-bearing tank, the blast furnace gas pipeline from the blast furnace is connected with an axial conveying device on the pressure tank, a cyclone device with guide vanes is arranged below the axial conveying device, so that the blast furnace gas rotates around the axis of the pressure chamber, the centrifugal force throws the particles in the blast furnace gas to the cylindrical outer wall of the pressure chamber, then the particles slide down to an ash collecting hopper along the outer wall, the gas flow turns upwards at the offset bell at the bottom and enters a central outlet pipe, and then the gas is discharged out of the dust remover, the guide vanes arranged in the dust removing device are up to 30, the gas vertically impacts the guide vanes downwards from the axial conveying device, because the vanes for generating cyclone flow are very dense, the gas flow velocity is increased, and the abrasion of the guide vanes is intensified.

CN 1676223A "spiral tube type cyclone dust removal process equipment", including dust gas inlet pipe, blast pipe, dust collecting bucket, cyclone separation chamber, its characteristics are that cyclone separation chamber upper end is connected with waste gas inlet pipe through a pressure distribution chamber, the cyclone separation chamber is indoor upper portion is equipped with along the circumference evenly distributed's 6-12 spiral tubes, the last mouth of spiral tube and the circumference hole butt joint of pressure distribution chamber, be equipped with the gaseous current-limiting dust depressor in the lower part trapezoidal section, the inner wall has wear-resisting material. The airflow forms low-speed, stable and thin-layer rotational flow under the action of the spiral cylinder, and the dust can be more effectively separated from the airflow by centrifugal force. The air flow in the pressure distribution chamber of the dust removing equipment is influenced by the angles of the air outlet pipe and the air inlet pipe, the distribution is not reasonable enough, and the abrasion of the outer wall is serious.

In patent CN 202099308U, "blast furnace gas axial flow cyclone dust collector", two gas inlet pipes distribute gas to the downcomer unevenly, and the inner diversion short pipe has less acceleration effect on the gas flow, so the dust collection efficiency is not high.

Disclosure of Invention

In order to solve the problems in the prior art, the invention aims to overcome the defects in the prior art and provide anti-blocking wear-resistant blast furnace gas dust recovery equipment, which has a simple structure relative to a double-inlet tangential cyclone dust collector, obviously reduces the equipment wear relative to an axial cyclone dust collector and simultaneously reduces the damping down times of a blast furnace due to the blocking and the abrasive leakage of the gas dust collection equipment.

In order to achieve the purpose, the invention adopts the following technical scheme:

an anti-blocking wear-resistant blast furnace gas dust recovery device comprises an air inlet pipe, a cutting chamber, a spiral channel, a separation chamber, an ash collection chamber, an air outlet pipe and an ash discharge chamber; the vertical section of the air inlet pipe is connected with the upper conical section of the shell of the blast furnace gas and dust recovery equipment, the air inlet pipe is connected with the separation sieve plate in the cutting chamber, and the central insert in the cutting chamber is respectively connected with the air outlet pipe of the vertical section and the air outlet pipe of the horizontal section; a spiral channel is arranged on the outer side of the vertical section of the air outlet pipe, and a separation chamber, an ash collection chamber and an ash discharge chamber are sequentially arranged below the spiral channel; an anti-blocking device is arranged at the bottom of the ash discharging chamber, and ash discharging holes are formed in the surface of the anti-blocking device.

The separating sieve plate is formed by a part of the side surface of the circular truncated cone formed by the lower edge of the vertical section of the air inlet pipe and the upper edge of the air outlet pipe of the vertical section; the number of the separating sieve plates is 1 or 2.

The included angle gamma between the separation sieve plate and the vertical plane where the gas inlet pipe and the center of the blast furnace gas dust recovery equipment are located is 0-15 degrees.

The cross section of the spiral channel is gradually changed into a rectangle from a semicircle; the upper part of the spiral channel is a vertical section, the lower part of the spiral channel is a spiral section, and the spiral section should avoid the lower edge of the air outlet pipe of the horizontal section; the section of the vertical section of the spiral channel is fan-shaped, and the section of the spiral section is fan-shaped or rectangular; the central angle swept by the spiral section of the spiral channel is 180-450 degrees.

The number of the spiral channels is 2 or 3.

The dust collecting chamber consists of a reducing pipe and a dust suppressor; a dust suppressor is arranged outside the convergent pipe.

The included angle between the generatrix of the reducing pipe and the central line of the blast furnace gas dust recovery equipment is alpha, and the alpha is larger than the natural accumulation angle of dust; the included angle between the generatrix of the dust suppressor and the central line of the blast furnace gas dust recovery equipment is beta, and the included angle alpha and the angle beta of the dust suppressor are mutually matched. The key of matching is that the opening of the reducer and the opening range of the dust suppressor are controlled by an angle, and the opening range of the dust suppressor can completely cover the opening of the reducer in the horizontal projection direction. An included angle alpha is determined, the size of the opening of the reducer is controlled through the angle beta, and finally when the dust suppressor is seen from top to bottom, the dust suppressor and the opening of the reducer are overlapped, namely the included angle alpha is matched with the angle beta of the dust suppressor.

The cross section of the central insert is in an inverted V shape; the upper surface of the central insert is covered with a wear-resistant layer.

The shape of the ash discharge hole is circular or oval.

Compared with the prior art, the invention has the following obvious and prominent substantive characteristics and remarkable advantages:

1. in the invention, the dusty airflow enters through the air inlet pipe and is uniformly divided into two paths of airflows under the guide and segmentation effects of the central insert and the separating and separating sieve plate of the segmentation chamber, thereby reducing the adverse effect of reduced dust removal effect caused by airflow segregation distribution;

2. the invention adopts the form of the built-in double helix channel, can uniformly and slowly change the axial airflow entering the blast furnace gas dust recovery equipment into tangential airflow, and reduces the scouring abrasion of the high-speed airflow on the guide vanes of the traditional axial cyclone dust collector;

3. the invention fully utilizes the internal space of the blast furnace gas dust recovery equipment, has large sectional area, low air flow speed and no rapid change of the air flow direction, thereby reducing the abrasion to the equipment, being beneficial to reducing the maintenance workload and prolonging the service life of the equipment;

4. the anti-blocking device optimizes the distribution of dust in the dust discharging chamber, and prevents the emergency maintenance of equipment caused by the blocking of an outlet.

Drawings

Fig. 1 is a schematic view of the internal structure of a device for anti-blocking wear-resistant recovery of blast furnace gas dust.

FIG. 2 is a schematic cross-sectional view of a horizontal segment of the exhaust pipe.

In the figure:

1, an air inlet pipe; 2-a cutting chamber, 21-a separating screen, 22-a central insert; 3-a helical channel; 4-vertical section of air outlet pipe; 5-a separation chamber; 6-dust collecting chamber, 61-reducing pipe, 62-dust suppressor; 7-recovering the blast furnace gas dust equipment shell; 8-horizontal segment air outlet pipe; 9-ash unloading chamber, 91-anti-blocking device.

Detailed Description

The technical solutions of the present invention are further described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention.

The device for recovering the blast furnace gas dust in an anti-blocking and wear-resisting manner comprises an air inlet pipe, a splitting chamber, a spiral channel, a separating chamber, a dust collecting chamber and an air outlet pipe, and is characterized in that the vertical section of the air inlet pipe is connected with the upper conical section of a shell of the device for recovering the blast furnace gas dust, an air flow from the air inlet pipe is uniformly divided into two strands by a separating sieve plate under the action of a central insertion piece, and the two strands of the air flow enter the separating chamber downwards along the spiral channel, are thrown to the inner wall of the device for recovering the blast furnace gas dust under the action of centrifugal force in the separating chamber and slide downwards along the inner wall, enter the dust collecting chamber, a dust falling gap is formed between a dust suppressor and a reducing pipe, the dust falls into the dust discharging chamber through the dust falling gap, and the air flow is discharged out of the device for recovering the blast furnace gas dust through the air outlet pipe.

Furthermore, the upper part of the spiral channel is a vertical section, the lower part of the spiral channel is a spiral section, and the spiral section should avoid the lower edge of the exhaust pipe of the horizontal section.

Furthermore, the section of the vertical section of the spiral channel is fan-shaped, and the section of the spiral section is fan-shaped or rectangular.

Further, the central angle of the sweeping circle of the spiral section of the spiral channel is 180-450 degrees.

Furthermore, the separating sieve plate is a part of the side surface of the circular truncated cone formed by the lower edge of the vertical section of the air inlet pipe and the upper edge of the air outlet pipe of the vertical section.

Further, the upper surface of the central insert is covered with a wear-resistant layer.

Furthermore, the section of the outlet pipe of the horizontal section is circular or elliptical.

Furthermore, an anti-blocking device is arranged in the ash discharging chamber, and a circular or oval ash discharging hole is formed in the surface of the anti-blocking device.

As shown in fig. 1 and 2, the blast furnace gas dust recovery equipment with anti-blocking and wear-resisting functions comprises an air inlet pipe 1; a cutting chamber 2; a spiral channel 3; a separation chamber 5; an ash collecting chamber 6 and air outlet pipes 4 and 8; the device is characterized in that a vertical section of an air inlet pipe 1 is connected with an upper conical section of a shell 7 of the equipment for recovering the blast furnace gas and dust, an air flow from the air inlet pipe 1 is uniformly divided into two parts under the action of a separating sieve plate 21 and enters a separating chamber 5 downwards through a spiral channel 3, a reducing pipe 61 and a dust suppressor 62 are arranged in an ash collecting chamber 6, an ash falling gap is arranged between the dust suppressor 62 and the reducing pipe 61, and the dust is thrown to the inner wall of the shell 7 of the equipment for recovering the blast furnace gas and dust under the action of centrifugal force in the separating chamber 5 and slides down along the inner wall to fall into an ash discharging chamber 9 through the ash falling gap. The dust is discharged out of the equipment through the anti-blocking device 91 regularly, and the surface of the anti-blocking device 91 is provided with a circular dust discharging hole.

The section of the vertical section and the section of the spiral channel 3 are fan-shaped.

The angle of the central angle swept by the helical section of the helical channel 3 is 270 °.

The upper surface of the central insert 22 is covered with a wear resistant cermet.

The cross-sectional shape of the horizontal exhaust pipe 8 is similar to an ellipse, as shown in fig. 2.

It will be appreciated by those skilled in the art that changes could be made to the embodiments herein without departing from the spirit of the invention. The above examples are merely preferred embodiments of the present invention, and should not be construed as limiting the scope of the claims.