Particle collection device

Abstract

The present invention provides a particle capture device, comprising: an inner sleeve, which is a cylindrical structure with one end open and the other end closed, and the inner sleeve wall is provided with layered holes; an outer sleeve, a sealing sleeve is arranged on the outside of the inner sleeve, and is connected with the inside of the inner sleeve through the layered holes; an annular inclined plate settling device, which is coaxially spaced between the inner sleeve and the outer sleeve, the inner side of the annular inclined plate settling device is spaced from the inner sleeve wall to form an ash falling area, the outer side of the annular inclined plate settling device is spaced from the outer sleeve wall to form a flue gas flow channel, and the flue gas flow channel is connected with the outlet of the outer sleeve. The beneficial effect of the present invention is that by arranging the inner sleeve, the outer sleeve and the annular inclined plate settling device, the micrometer-level particles carried in the converter flue gas can be separated, and the explosion hazard caused by the particle fire can be eliminated.

Description

Technical Field

[0001] The invention relates to the field of converter fume recovery, and in particular to a particle capture device. Background Art

[0002] As domestic enterprises' awareness of energy conservation and environmental protection gradually increases, research on full waste heat recovery of converter flue gas and exploration of true dry dust removal technology have become the focus of many steel mills.

[0003] There are many separation and capture technologies for the micron-sized particles contained in flue gas, mainly wet or semi-dry separation, cyclone separation, bag separation, etc., which use gravity, centrifugal force, inertial force and resistance to separate them from flue gas. Since wet or semi-dry separation technology requires additional water consumption, the physical and chemical properties of dust particles (mainly Fe2O3) change under the condition of high temperature and water, which affects the secondary utilization of dust; cyclone separation technology flue gas is prone to eddy currents; bag separation technology has a large pressure loss and is not suitable for high-temperature flue gas. None of the above separation technologies can be applied to the full dry waste heat recovery process of converter flue gas. Therefore, it is necessary to develop a dry micron-sized particle capture technology that is efficient, simple, and suitable for intermittent conversion of high, medium and low temperatures and high, medium and low flow rates. Summary of the invention

[0004] The invention provides a particle capture device to achieve the purpose of separating and capturing particles in flue gas.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a particle capture device, comprising: an inner sleeve, which is a cylindrical structure with one end open and the other end closed, and the cylinder wall of the inner sleeve is provided with layered holes; an outer sleeve, a sealing sleeve is arranged on the outside of the inner sleeve, and is connected with the inside of the inner sleeve through the layered holes; an annular inclined plate sedimentation device, which is coaxially spaced between the inner sleeve and the outer sleeve, the inner side of the annular inclined plate sedimentation device is spaced from the cylinder wall of the inner sleeve to form an ash falling area, the outer side of the annular inclined plate sedimentation device is spaced from the cylinder wall of the outer sleeve to form a smoke flow channel, and the smoke flow channel is connected with the outlet of the outer sleeve.

[0006] Furthermore, an intermediate shield body is arranged in the inner sleeve and has a cone-shaped structure. The large diameter end of the intermediate shield body is fixed to the closed end of the inner sleeve, and the small diameter end of the intermediate shield body faces the open end of the inner sleeve.

[0007] Furthermore, the wall of the inner sleeve includes an inner sleeve inner wall and an inner sleeve outer wall which are arranged at intervals, and a plurality of layered holes are arranged at intervals, and each layered hole passes through the inner sleeve inner wall and the inner sleeve outer wall.

[0008] Furthermore, an annular layered plate is fixedly arranged between the inner wall of the inner sleeve and the outer wall of the inner sleeve, and the annular layered plate includes a plurality of plate-like structures arranged in parallel and at intervals, and a layered hole is arranged between every two adjacent plate-like structures.

[0009] Furthermore, each plate-like structure has the same included angle with the inner wall of the inner sleeve, and the included angle ranges from 0° to 90°.

[0010] Furthermore, the height of the multi-component layer holes gradually decreases along the direction from the upper end to the lower end of the inner sleeve.

[0011] Furthermore, the annular inclined plate sedimentation device includes: an annular inclined plate sedimentation assembly, corresponding to the position of the annular stratified plate, the annular inclined plate sedimentation assembly includes a plurality of parallel and spaced inclined plates, and each inclined plate has an angle with the horizontal plane, one end of each inclined plate faces the inner sleeve, and the other end of each inclined plate faces the outer sleeve, and in the vertical direction, one end of the inclined plate is lower than the other end of the inclined plate; an ash hopper, spaced and sleeved at the lower end of the inner sleeve, and an ash falling area is formed between the inner wall of the ash hopper and the lower end wall of the inner sleeve.

[0012] Furthermore, the angle between each inclined plate and the horizontal plane ranges from 0° to 180°.

[0013] Furthermore, the horizontal width of the ash hopper ranges from 200 mm to 500 mm.

[0014] The beneficial effect of the present invention is that by arranging the inner sleeve, the outer sleeve and the annular inclined plate settling device, the micrometer-sized particles carried in the converter flue gas can be separated, eliminating the explosion hazard caused by the particle fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0017] Reference numerals in the figure: 10, inner sleeve; 11, inner sleeve inner wall; 12, inner sleeve outer wall; 20, outer sleeve; 30, intermediate shield; 40, annular stratification plate; 51, annular inclined plate settling assembly; 52, ash hopper; 53, ash outlet; 54, ash falling area. DETAILED DESCRIPTION

[0018] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0019] like Figure 1 As shown, an embodiment of the present invention provides a particle capture device, including an inner sleeve 10, an outer sleeve 20 and an annular inclined plate settling device. The inner sleeve 10 is a cylindrical structure with an open upper end and a closed lower end, and the cylinder wall of the inner sleeve 10 is provided with layered holes. The outer sleeve 20 is sealed and sleeved on the outside of the inner sleeve 10, and the outer sleeve 20 is connected with the inside of the inner sleeve 10 through the layered holes. The annular inclined plate settling device is coaxially sleeved between the inner sleeve 10 and the outer sleeve 20, the inner side of the annular inclined plate settling device is spaced apart from the cylinder wall of the inner sleeve 10 and forms an ash falling area 54, the outer side of the annular inclined plate settling device is spaced apart from the cylinder wall of the outer sleeve 20 and forms a smoke flow channel, and the smoke flow channel is connected with the lower end outlet of the outer sleeve 20.

[0020] By providing the inner sleeve 10, the outer sleeve 20 and the annular inclined plate settling device, the micrometer-sized particles carried in the converter flue gas can be separated to eliminate the explosion hazard caused by the particle fire.

[0021] In the embodiment of the present invention, one end of the inner sleeve 10 is a cylindrical structure and is open, and the other end is a conical structure and is closed. The inner sleeve 10 has a straight wall with layered holes to connect the inner sleeve 10 and the outer sleeve 20. Figure 1 As shown, the arrow direction in the figure is the direction of smoke flow. It can be seen from the figure that the smoke enters from an opening at one end of the inner sleeve 10, enters the outer sleeve 20 after passing through the layered holes, and is discharged from the outlet provided by the outer sleeve 20.

[0022] like Figure 1 As shown, an intermediate shield body 30 is disposed in the inner sleeve 10 in the embodiment of the present invention, which has a cone-shaped structure. The large diameter end of the intermediate shield body 30 is fixed to the closed end of the inner sleeve 10 , and the small diameter end of the intermediate shield body 30 faces the open end of the inner sleeve 10 .

[0023] The middle shield 30 is arranged in the inner sleeve 10, which can maintain the plug flow form of the smoke in the device and avoid explosion hazards caused by eddy currents and retention of the smoke.

[0024] It should be noted that the intermediate shield body 30 in this embodiment may be other structures, and any structure that can maintain the plug flow form of the smoke in the device should be within the protection scope of this application.

[0025] Preferably, the wall of the inner sleeve 10 includes an inner sleeve inner wall 11 and an inner sleeve outer wall 12 arranged at intervals, and the layered holes are multiple groups arranged at intervals, and each group of layered holes includes a first layered hole arranged on the inner sleeve inner wall 11 and a second layered hole correspondingly arranged on the inner sleeve outer wall 12.

[0026] Furthermore, an annular stratified plate 40 is fixedly arranged between the inner sleeve inner wall 11 and the inner sleeve outer wall 12. The annular stratified plate 40 includes a plurality of plate structures arranged in parallel and at intervals. Smoke flow channels are formed between two adjacent plate structures, and each smoke flow channel is connected to a group of corresponding stratified holes.

[0027] The provision of the annular layered plate 40 can maintain the plug flow form of the smoke in the device, thereby avoiding explosion hazards caused by eddy currents and retention of the smoke.

[0028] In the embodiment of the present invention, the inner sleeve 10 is divided into n layers from top to bottom by the annular layered plate 40 between the inner sleeve inner wall 11 and the inner sleeve outer wall 12 , wherein n≥2.

[0029] Each plate-like structure is annular funnel-shaped, that is, in the vertical direction, the inner side of each plate-like structure is lower than the outer side to form an inwardly concave slope, wherein each plate-like structure has the same angle with the inner wall 11 of the inner sleeve, and the angle ranges from 0° to 90°.

[0030] In the embodiment of the present invention, the height of the multi-group layered holes gradually decreases from the upper end to the lower end of the inner sleeve 10 to ensure that the smoke evenly enters each layer of the inner sleeve 10. At the same time, the number of groups of layered holes, the positions of the openings of the layered holes, and the width of the openings can be set to the same width or different widths according to the different inclination angles of the original flue at the flue inlet, which can further ensure that the smoke evenly enters each layer of the inner sleeve 10.

[0031] It should be noted that the diameter of the inner sleeve inner wall 11 is not less than the original flue diameter and is directly connected to the original flue; the difference between the diameter of the inner sleeve outer wall 12 and the diameter of the inner sleeve inner wall 11 is not less than 150 mm. The total height of the inner sleeve outer wall 12 is not less than half of the original flue inner diameter, so as to achieve the purpose of reducing the speed of the flue gas when it flows from the original flue through the inner sleeve 10.

[0032] like Figure 1 As shown, the annular inclined plate settling device in the embodiment of the present invention includes an annular inclined plate settling assembly 51, an ash hopper 52 and an ash outlet 53. The annular inclined plate settling assembly 51 corresponds to the position of the annular layering plate 40. The annular inclined plate settling assembly 51 includes a plurality of parallel and spaced inclined plates, and each inclined plate has an angle with the horizontal plane, one end of each inclined plate faces the inner sleeve 10, and the other end of each inclined plate faces the outer sleeve 20, and in the vertical direction, one end of the inclined plate is lower than the other end of the inclined plate. The ash hopper 52 is spaced and sleeved at the lower end of the inner sleeve 10, and an ash falling area 54 is formed between the inner wall of the ash hopper 52 and the lower end wall of the inner sleeve 10. The accumulated ash in the ash falling area 54 is discharged from the device through the ash outlet 53.

[0033] Further, the outlet of the outer sleeve 20 can be located at the upper end (i.e., set as an upper outlet) or at the lower end (i.e., set as a lower outlet). When the outer sleeve 20 is provided with a lower outlet, this embodiment further includes an ash discharge device, one end of which is connected to the ash outlet 53, and the other end of which is placed outside the outer sleeve 20. The ash discharge device can discharge the ash out of the device.

[0034] Preferably, the angle between each inclined plate and the horizontal plane is between 0° and 180°. The width of each inclined plate can be the same or different. Of course, each inclined plate can be arranged in a certain pattern according to the length of the inclined plate width (that is, the inclined plates constituting the annular inclined plate settlement assembly 51 can have the same length or be arranged in a regular pattern of one long and one short, and one long and one short), and the width of each inclined plate is not less than 600 mm and not more than 2500 mm.

[0035] Preferably, the annular inclined plate sedimentation assembly 51 cannot be directly connected to the inner sleeve outer wall 12, and an ash falling area 54 must be provided. The horizontal width of the ash falling area 54 ranges from 200 mm to 500 mm (i.e., the difference between the outer diameter of the ash hopper 52 and the inner sleeve outer wall 12) to ensure that the ash falls smoothly into the ash hopper 52 and no ash is accumulated on each layer of the inclined plates.

[0036] In the embodiment of the present invention, the flue gas enters the device in the form of a plunger flow, and the flue gas velocity at the device inlet is 5m / s-20m / s. The flue gas temperature is room temperature-1000℃. The flue gas entering the device is dusty flue gas, and the particle concentration carried in the flue gas can be as high as 200g / Nm 3 Particles with a diameter of 20μm to 50μm in the flue gas can be partially separated, and particles with a diameter of more than 50μm can be completely separated.

[0037] When the embodiment of the present invention is applied:

[0038] The high-temperature flue gas generated during the converter smelting process enters the device connected to the end of the vaporization cooling flue through the vaporization cooling flue located above the converter. First, the flue gas enters the device from the upper port of the inner wall 11 of the inner sleeve in the form of a plunger flow, and after being guided by the stratification holes and the annular stratification plate 40, it enters the annular inclined plate settling assembly 51 at a low speed, and separates the large particles of the order of micrometers in the smoke in the annular inclined plate settling assembly 51. The separated particles enter the ash falling area 54 and are discharged from the ash outlet 53 at the bottom of the ash falling area 54. Finally, the preliminarily purified flue gas enters the subsequent process device from the outlet of the outer sleeve 20.

[0039] In this embodiment, the diameter of the inner sleeve inner wall 11 is 2600mm, the diameter of the inner sleeve outer wall 12 is 2750mm, the height of the inner sleeve outer wall 12 is 4000mm, and the annular layered plate 40 divides the inner sleeve inner wall 11 and the inner sleeve outer wall 12 into five layers from top to bottom, and the angle between the annular layered plate 40 and the inner sleeve inner wall 11 is 38°. The height of each layer of layered holes is 15mm, 65mm, 115mm, 165mm, and 215mm from top to bottom, and the number of openings of each layer of layered holes is 24, which are evenly distributed in an annular shape, and the width of all layered holes is 200mm. The horizontal distance between the dust falling area 54 of the inner sleeve outer wall 12 and the annular inclined plate settling assembly 51 is 300 mm. The selection parameters of the annular inclined plate settling assembly 51 are as follows: the inclination angle between the inclined plate and the horizontal plane is 38°, the width of the inclined plate is 500 mm, the height of the inclined plate layer is 150 mm, and a total of 27 layers of inclined plates are arranged.

[0040] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0041] By arranging this embodiment at the end of the converter flue gas vaporization cooling flue, micrometer-sized particles carried in the converter flue gas can be separated, eliminating the explosion hazard caused by particle fire.

[0042] It forms a straight-through flow space with the original flue, with a wider flow section and a lower flue gas flow rate, so that the flue gas can always maintain a continuous plunger flow during the flow process, without the existence of a smoke retention area, thus eliminating the explosion hazard from a structural perspective.

[0043] Through this embodiment, the separation rate of particles with a diameter of 50 μm and above can reach 100%.

[0044] The annular inclined plate settling device can handle a wide range of flue gas temperatures, from 1000°C to 100°C; it can handle a wide range of flue gas flow rates, from 5m / s to 20m / s.

[0045] In the process of treating high-temperature flue gas with the device, the physical and chemical properties of the dust-containing particles are not disturbed by the outside world and can remain unchanged, which is conducive to the secondary utilization of the dust.

[0046] The above is only a specific embodiment of the present invention, and cannot be used to limit the scope of the invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention, should still fall within the scope of this patent. In addition, the technical features of the present invention can be freely combined with each other, with each other, and with each other.

Claims

1. A particle capture device, characterized in that: include: The inner sleeve (10) is a cylindrical structure with one end open and the other end closed, and the wall of the inner sleeve (10) is provided with layered holes; An outer sleeve (20), wherein the sealing sleeve is arranged outside the inner sleeve (10) and is communicated with the interior of the inner sleeve (10) through the layered holes; An annular inclined plate settling device is coaxially spaced between the inner sleeve (10) and the outer sleeve (20), the inner side of the annular inclined plate settling device is spaced from the wall of the inner sleeve (10) to form an ash falling area (54), the outer side of the annular inclined plate settling device is spaced from the wall of the outer sleeve (20) to form a smoke flow passage, and the smoke flow passage is connected to the outlet of the outer sleeve (20); The wall of the inner sleeve (10) comprises an inner sleeve inner wall (11) and an inner sleeve outer wall (12) arranged at intervals, and the layered holes are multiple and arranged at intervals, and each of the layered holes passes through the inner sleeve inner wall (11) and the inner sleeve outer wall (12); An annular stratified plate (40) is fixedly arranged between the inner wall (11) of the inner sleeve and the outer wall (12) of the inner sleeve, and the annular stratified plate (40) comprises a plurality of plate-like structures arranged in parallel and at intervals, and a stratified hole is arranged between every two adjacent plate-like structures; The annular inclined plate settling device comprises: An annular inclined plate settling assembly (51) corresponds to the position of the annular layered plate (40), the annular inclined plate settling assembly (51) comprising a plurality of inclined plates arranged in parallel and spaced apart, each of the inclined plates having an angle with a horizontal plane, one end of each of the inclined plates facing the inner sleeve (10), the other end of each of the inclined plates facing the outer sleeve (20), and in the vertical direction, one end of the inclined plate is lower than the other end of the inclined plate; An ash hopper (52) is sleeved at the lower end of the inner sleeve (10) to form an ash falling area (54) between the inner wall of the ash hopper (52) and the lower end wall of the inner sleeve (10); The ash outlet (53) is used to discharge the accumulated ash in the ash falling area (54) out of the device.

2. The particle capture device according to claim 1, characterized in that: An intermediate shield body (30) is arranged inside the inner sleeve (10) and has a cone-shaped structure. The large-diameter end of the intermediate shield body (30) is fixed to the closed end of the inner sleeve (10), and the small-diameter end of the intermediate shield body (30) faces the open end of the inner sleeve (10).

3. The particle capture device according to claim 1, characterized in that: Each of the plate-like structures has the same included angle with the inner wall (11) of the inner sleeve, and the range of the included angle is 0° to 90°.

4. The particle capture device according to claim 1, characterized in that: Along the direction from the upper end to the lower end of the inner sleeve (10), the heights of the multiple groups of layered holes gradually decrease.

5. The particle capture device according to claim 1, characterized in that: The angle between each inclined plate and the horizontal plane ranges from 0° to 180°.

6. The particle capture device according to claim 1, characterized in that: The horizontal width of the ash hopper (52) ranges from 200 mm to 500 mm.

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