High-temperature-resistant spiral cylinder type cyclone dust removal equipment

Abstract

The utility model relates to high-temperature-resistant spiral cylinder type cyclone dust removal equipment, which comprises an accumulated gas distribution chamber, a cyclone separation chamber, an ash storage bin, a coal gas inlet pipe and a coal gas outlet pipe which are sequentially connected from top to bottom, and is characterized in that the coal gas inlet pipe is arranged on the side surface of the accumulated gas distribution chamber, and a clean coal gas exhaust pipe is positioned in the center of the dust removal equipment; an upper-end gas outlet extends out of the top of the accumulated gas distribution chamber, a lower-end gas inlet extends into the cyclone separation chamber, spiral cooling water devices are uniformly distributed on the inner wall of the cyclone separation chamber along the circumference of the coal gas outlet pipe, and the ash storage bin is connected with the lower end of the cyclone separation chamber through a corrugated pipe. The device has the advantages of being suitable for dust removal of high-temperature coal gas and high in dust removal efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust removal process equipment, and particularly relates to a high-temperature resistant spiral cylinder type cyclone dust removal device. Background Art

[0002] At present, the conventional iron-making method is blast furnace iron-making. The temperature of its furnace gas is generally 100°C - 300°C. High requirements are imposed on the dust removal equipment for blast furnace gas dust removal. There are many types of blast furnace coal body dust removal equipment, such as bag dust removal equipment, spiral cylinder type cyclone dust removal equipment, cyclone separators, etc. The patent application for invention 00802241.0 discloses a "blast furnace gas dust removal device", which includes a large cyclone separator, a vertical pressure tank. The blast furnace gas pipeline from the blast furnace is connected to the axial conveying device located on the pressure tank. A swirling 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 towards the cylindrical outer wall of the pressure chamber, and then slides down along the outer wall to the ash hopper. The air flow turns upward at the bottom offset bell and enters the central outlet pipe to discharge the dust remover. This dust removal device is provided with an axially complex conveying device. The guide vanes of the swirling device are inclined at an angle of 15° - 30°, and there can be up to 30 guide vanes. The gas impacts the guide vanes vertically downward from the axial conveying device, which on the one hand aggravates the wear of the guide vanes, and on the other hand increases the air flow velocity due to the dense swirling blades, which is not conducive to improving the dust removal effect. The axial conveying device here has a complex structure and high technical requirements.

[0003] The spiral cylinder type cyclone dust removal device is an effective dust removal device for blast furnace gas. This device is suitable for the conventional blast furnace iron-making method, that is, it meets the requirements for blast furnace gas dust removal when the blast furnace gas temperature is 100°C - 300°C. With the development of iron-making, people have developed the smelting reduction iron-making process, and the temperature of its gas is 900°C - 1100°C. If the commonly used spiral cylinder type cyclone dust removal process equipment is adopted, it cannot meet the requirements for blast furnace gas dust removal in the smelting reduction iron-making process. Summary of the Invention

[0004] The purpose of the utility model is to provide a spiral cylinder type cyclone dust removal device suitable for high-temperature gas dust removal and with high dust removal efficiency.

[0005] A high-temperature resistant spiral cylinder type cyclone dust removal device of the utility model comprises an air accumulation distribution chamber, a cyclone separation chamber and an ash storage bin which are connected in sequence from top to bottom, a gas inlet pipe and a clean gas exhaust pipe. It is characterized in that the gas inlet pipe is arranged on the side surface of the air accumulation distribution chamber, the clean gas exhaust pipe is located at the center of the dust removal device, the upper end air outlet extends out of the top of the air accumulation distribution chamber, and the lower end air inlet extends into the cyclone separation chamber. A spiral cooling water device is evenly distributed along the circumference of the clean gas exhaust pipe on the inner wall of the cyclone separation chamber. The spiral cooling water device comprises a plurality of upper water beams, a plurality of lower water beams and high-temperature resistant composite spiral water pipes. The plurality of upper water beams and the plurality of lower water beams are arranged at equal intervals and staggered up and down between the inner wall of the cyclone separation chamber and the periphery of the clean gas exhaust pipe. A cooling water inlet ring pipe and a cooling water outlet ring pipe are arranged on the outer wall of the cyclone separation chamber. The plurality of lower water beams are communicated with the cooling water inlet ring pipe, and the plurality of upper water beams are communicated with the cooling water outlet ring pipe. The plurality of lower water beams are respectively connected to the corresponding upper water beams at intervals through a plurality of high-temperature resistant composite spiral water pipes to form a spiral circulating water flow channel distributed in a circle. The ash storage bin is connected to the lower end of the cyclone separation chamber through a corrugated pipe.

[0006] Preferably, there are eight upper water beams and eight lower water beams. The high-temperature resistant composite spiral water pipe is composed of an arc-shaped water pipe, steel meshes arranged above and below the arc-shaped water pipe, anchor bolts evenly distributed on the steel meshes, and high-temperature resistant, wear-resistant and corrosion-resistant materials for casting the arc-shaped water pipe, the steel meshes and the anchor bolts into an arc-shaped water supply channel. High-aluminum bricks are built on the upper part of the arc-shaped water supply channel. One end of each arc-shaped water supply channel is communicated with one of the eight lower water beams, and the other end is communicated with one of the eight upper water beams at intervals, and so on, to form a spiral circulating water flow channel with a closed integral structure distributed in a circle.

[0007] Preferably, the clean gas exhaust pipe is composed of a cylindrical shell made of a serpentine pipe and high-temperature resistant, wear-resistant and corrosion-resistant materials sprayed on the inner and outer walls of the cylindrical shell. The water inlet of the serpentine pipe is connected to the cooling water inlet ring pipe, and the water outlet is connected to the cooling water return ring pipe.

[0008] Preferably, the shells of the air accumulation distribution chamber and the cyclone separation chamber are composed of steel plates, ceramic fiber felts, high-temperature resistant, high-strength and lightweight castable materials and high-aluminum bricks.

[0009] The advantages of the utility model are:

[0010] 1) Since a spiral cooling water device is provided in the cyclone separation chamber of the present utility model, the high-temperature resistant composite spiral water pipe of the cooling water device forms multiple layers of spiral gas flow channels in the cyclone separation chamber. When the coal gas enters the gas collection and distribution chamber from the inlet pipe, its volume expands, resulting in a decrease in the gas flow velocity. The gas flow velocity in the gas accumulation and distribution chamber is generally 3 - 8 m / s; when the coal gas enters the cyclone separation chamber, the gas flow velocity in the spiral channel is 14 - 24 m / s, effectively separating the soot in the coal gas flow.

[0011] By adding a water cooling system in the clean coal gas exhaust pipe, a water-cooled flue is formed to ensure the normal operation of the clean coal gas exhaust pipe under high-temperature conditions.

[0012] A corrugated pipe is provided between the cyclone separation chamber and the ash storage bin, and the two parts are connected by flanges, effectively solving the problems of the high height of the equipment body and the large temperature deformation. Brief Description of the Drawings

[0013] Figure 1 is a structural schematic diagram of the present utility model;

[0014] Figure 2 is Figure 1 the A - A cross-sectional view of

[0015] Figure 3 is Figure 2 the B - B cross-sectional view of

[0016] Figure 4 is Figure 3 the C - C cross-sectional view of Detailed Embodiment

[0017] The following describes the detailed embodiment of the present utility model in conjunction with the structural schematic diagram;

[0018] As Figures 1-4As shown in the figure; a high-temperature resistant spiral cylinder type cyclone dust removal device of the present utility model includes a gas accumulation distribution chamber 1, a cyclone separation chamber 2, and a dust storage bin 3 that are connected in sequence from top to bottom, a gas inlet pipe 4 for gas and a clean gas exhaust pipe. The shells of the gas accumulation distribution chamber 1 and the cyclone separation chamber 2 are composed of a steel plate 11, a ceramic fiber felt 12, a high-temperature resistant, high-strength and lightweight castable 13, and a high-aluminum brick 14, meeting the requirements of high-temperature heat insulation; the gas inlet pipe 4 for gas is arranged on the side of the gas accumulation distribution chamber 1, the clean gas exhaust pipe is located at the center of the dust removal device, the upper air outlet extends out of the top of the gas accumulation distribution chamber 1, and the lower air inlet extends into the cyclone separation chamber 2. The clean gas exhaust pipe is composed of a cylindrical shell 51 made of serpentine pipes and a high-temperature resistant, wear-resistant and corrosion-resistant material 52 sprayed on the inner and outer walls of the cylindrical shell. The water inlet 54 of the serpentine pipe is connected to the cooling water inlet ring pipe, and the water outlet 53 is connected to the cooling water return ring pipe. Along the circumference of the clean gas exhaust pipe on the inner wall of the cyclone separation chamber 2, a spiral cooling water device 6 is evenly distributed. The spiral cooling water device 6 includes a plurality of upper water beams 61, a plurality of lower water beams 62, and a high-temperature resistant composite spiral water pipe 63. The plurality of upper water beams 61 and the plurality of lower water beams 62 are equally spaced and arranged in a staggered manner between the inner wall of the cyclone separation chamber 2 and the periphery of the clean gas exhaust pipe. On the outer wall of the cyclone separation chamber 2, there are a cooling water inlet ring pipe 64 and a cooling water outlet ring pipe 65. The plurality of lower water beams 62 are connected to the cooling water inlet ring pipe 64, and the plurality of upper water beams 61 are connected to the cooling water outlet ring pipe 65. The plurality of lower water beams 62 are respectively connected to the corresponding upper water beams 61 at intervals through a plurality of high-temperature resistant composite spiral water pipes 63, forming a spiral circulating water flow channel distributed in a circular pattern; there are eight upper water beams 61 and eight lower water beams 62. The high-temperature resistant composite spiral water pipe 63 is composed of an arc-shaped water pipe 631, steel meshes 632 arranged above and below the arc-shaped water pipe 631, anchor bolts 633 evenly distributed on the steel meshes 632, and a high-temperature resistant, wear-resistant and corrosion-resistant material 634 that casts the arc-shaped water pipe 631, the steel meshes 632, and the anchor bolts 633 into an arc-shaped water supply channel. A high-aluminum brick 635 is built on the upper part of the arc-shaped water supply channel. One end of each arc-shaped water supply channel is connected to one of the eight lower water beams 62, and the other end is connected to one of the eight upper water beams 61 at intervals, and so on, forming a spiral circulating water flow channel with a closed integral structure distributed in a circular pattern. The high-temperature resistant composite spiral water pipe with this structure can design the air flow velocity according to the dust removal efficiency and the service life of the refractory material, and can effectively separate the dust in the gas entering the cyclone separation chamber 2 according to the designed dust removal efficiency.

[0019] Since the medium to be processed is high-temperature gas, the equipment body is tall and has a large temperature deformation. The dust storage bin 3 of the present utility model is connected to the lower end of the cyclone separation chamber 2 by a flange through a corrugated pipe 8.

[0020] In the present utility model, an upper foundation support 7 is provided at the lower part of the outer wall of the cyclone separation chamber 2 of the high-temperature spiral cylinder type cyclone dust removal device, and a lower foundation support 10 is provided on the outer wall of the ash storage bin 3 to fix the upper and lower parts of the device.

[0021] In the present utility model, a level sensor 9 is further provided on the ash storage bin 3. The level sensor 9 monitors the ash level in real time. When the ash level reaches the specified position, it is discharged through the ash discharge port 11.

[0022] The dust removal working principle of the high-temperature spiral cylinder type cyclone dust removal process equipment of the present utility model is as follows:

[0023] The high-temperature blast furnace gas enters the gas accumulation and distribution chamber 1 through the gas inlet pipe and then enters the spiral cylinder (the spiral cylinder is composed of 8 spiral channels distributed in a circle). The gas enters the spiral channel and makes a spiral movement along the spiral channel. The dust in the gas moves spirally downward along the inner wall of the dust collector under the action of centrifugal force and is separated from the gas. After separation, it falls into the ash storage bin along the inner wall of the swirl inverted cone. After dust removal, the gas makes a spiral movement to the swirl inverted cone and then moves upward in the reverse direction and is discharged through the gas outlet pipe. When the ash storage bin is full of dust, it is discharged through the ash discharge port.

[0024] The present utility model is applicable to the rough dust removal process equipment for the gas and flue gas generated by metallurgical furnaces with a temperature range less than 1200 °C. Such as; the primary dust removal of the gas from the shaft furnace for smelting reduction ironmaking and the flue gas from the coke dry quenching furnace, and the high-temperature gas dust removal of the steelmaking converter, etc. It provides an effective method for the efficient rough dust removal of the high-temperature gas and flue gas of metallurgical furnaces.

Claims

1. A high temperature resistant spiral drum cyclone dust removal device, comprising a gas distribution chamber, a cyclone separation chamber and an ash storage bin, a gas inlet pipe and a gas outlet pipe connected in sequence from top to bottom, characterized in that: The gas inlet pipe is arranged on the side of the gas accumulation distribution chamber, the clean gas exhaust pipe is located in the center of the dust removal equipment, the upper air outlet extends out of the top of the gas accumulation distribution chamber, and the lower air inlet extends into the cyclone separation chamber. A spiral cooling water device is evenly distributed on the inner wall of the cyclone separation chamber along the circumference of the clean gas exhaust pipe. The spiral cooling water device includes a plurality of upper water beams, a plurality of lower water beams and a high-temperature resistant composite spiral water pipe. The plurality of upper water beams and the plurality of lower water beams are equally spaced and staggered up and down between the inner wall of the cyclone separation chamber and the circumference of the clean gas exhaust pipe. A cooling water inlet ring pipe and a cooling water outlet ring pipe are provided on the outer wall of the cyclone separation chamber. A plurality of lower water beams are connected to the cooling inlet ring pipe, a plurality of upper water beams are connected to the cooling outlet ring pipe, and a plurality of lower water beams are respectively connected to the corresponding upper water beams through a plurality of high-temperature resistant composite spiral water pipes at intervals to form a spiral circulating water flow channel distributed along the circumference. The ash storage bin is connected to the lower end of the cyclone separation chamber through a bellows.

2. The high temperature resistant spiral drum cyclone dust removal equipment according to claim 1 is characterized in that: There are eight upper water beams and eight lower water beams. The high-temperature resistant composite spiral water pipe is composed of an arc-shaped water pipe, a steel mesh arranged above and below the arc-shaped water pipe, anchors evenly distributed on the steel mesh, and a high-temperature resistant, wear-resistant material that casts the arc-shaped water pipe, the steel mesh and the anchors into an arc-shaped water supply channel. High-aluminum bricks are laid on the upper part of the arc-shaped water supply channel. One end of each arc-shaped water supply channel is connected to one of the eight lower water beams, and the other end is connected to one of the eight upper water beams at intervals, and so on, to form a spiral circulation water flow channel with a closed integral structure distributed along the circumference.

3. The high temperature resistant spiral drum cyclone dust removal equipment according to claim 1, characterized in that: The clean gas exhaust pipe is composed of a cylindrical shell composed of a serpentine tube and high temperature resistant, wear resistant materials sprayed on the inner and outer walls of the cylindrical shell. The water inlet of the serpentine tube is connected to the cooling water inlet ring pipe, and the water outlet is connected to the cooling water return ring pipe.

4. The high temperature resistant spiral drum cyclone dust removal equipment according to claim 1, characterized in that: The shells of the gas accumulation distribution chamber and the cyclone separation chamber are composed of steel plates, ceramic fiber felt, high-temperature resistant and high-strength lightweight castables and high-alumina bricks.

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