Shallow inclined plate sedimentation device and particle capturing method

Abstract

The present application is a kind of shallow inclined plate settling device and particle trapping method, the device includes a plurality of settling layers, each settling layer includes a plurality of shallow settling units, shallow settling unit includes an inclined plate group, the inclined plate group includes a bottom inclined plate and a plurality of upper inclined plates arranged in parallel and spaced, between adjacent upper inclined plates, between the bottom inclined plate and the upper inclined plate adjacent thereto, a flue gas settling channel is formed, the inclined plate group is downwardly inclined on one side of the flue gas settling channel inlet to make the trapped particles flow downward, the bottom inclined plate and each upper inclined plate are arranged as an arched folded plate upwardly arched, the arch crown fold line of the arched folded plate is arranged along the flue gas flow direction; the inclined plate group is provided with a tail baffle plate on one side of the flue gas settling channel outlet. Each inclined plate of the present application is inclined in double axis direction, which reduces the influence of deformation caused by high temperature thermal stress on the settling effect of the inclined plate; the tail baffle plate is arranged behind the shallow settling unit, which reduces the front washing of the next contact unit when the high temperature flue gas flows out.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steelmaking, and particularly relates to a shallow inclined plate settling device applicable to high-temperature working conditions and a particle capturing method. BACKGROUND

[0002] Converter steelmaking is an intermittent production mode. During the normal smelting production stage of the converter, the flue gas is high in temperature, large in amount, high in dust content, high in flue gas flow rate in the pipeline, and high in CO content; in order to prevent the explosion of flue gas caused by the ignition of large particles of high-temperature fire carried, the separation of high-temperature large particles, especially micrometer-level large particles (particles with an average particle size of not less than 50 microns) needs to be completed before waste heat recovery, so as to ensure that no explosion occurs in the whole waste heat recovery stage. During the preparation activity stage of the converter, the flue gas is low in temperature, small in amount, low in dust content, and small in flue gas flow rate in the pipeline, and the CO content is between the upper and lower limit concentrations of explosion; if large particles of sufficient energy exist at the same time, an explosion is likely to be caused, so the capture of large particles is also important in this stage.

[0003] There are many separation and capture technologies for micrometer-level large particles contained in flue gas, mainly including wet or semi-dry separation, cyclone separation, and bag separation, etc., which separate the large particles from the flue gas by using gravity, centrifugal force, inertial force, and resistance. The wet or semi-dry separation technology needs additional water, and the physicochemical properties of dust particles (mainly composed of Fe2O3) change under the condition of high temperature and water, which affects the secondary utilization of dust; the cyclone separation technology is prone to vortex of flue gas; and the bag separation technology has large pressure loss and is not suitable for high-temperature flue gas. Therefore, it is necessary to develop a dry micrometer-level large particle capture technology which is efficient, simple, and applicable to intermittent conversion of high, medium, and low temperatures and high, medium, and low flow rates.

[0004] The present application is proposed by the present inventor on the basis of years of experience and practice in the relevant industry, so as to overcome the defects of the prior art. SUMMARY

[0005] The present application aims to provide a shallow inclined plate settling device and a particle capturing method. The inclined plates of the shallow settling unit are inclined in double axes, so as to reduce the influence of deformation caused by high-temperature thermal stress on the settling effect of the inclined plates and reduce dust accumulation; and a tail baffle plate is arranged behind the shallow settling unit, so as to reduce the front washing of the next contact unit when the high-temperature flue gas flows out.

[0006] The object of the present application is achieved in that a shallow inclined plate settling device is arranged between the flue gas inlet and the flue gas outlet of a flue gas passage, the shallow inclined plate settling device is used for circulating flue gas and settling particles in the flue gas, the shallow inclined plate settling device comprises a plurality of settling layers arranged in parallel and at intervals, each of the settling layers comprises a plurality of shallow settling units, the shallow settling unit comprises an inclined plate group, the inclined plate group comprises a bottom inclined plate and a plurality of upper inclined plates arranged in parallel and at intervals, a flue gas settling passage is formed between adjacent upper inclined plates and between the bottom inclined plate and the upper inclined plate adjacent thereto, the inclined plate group is arranged on one side of the inlet of the flue gas settling passage and is arranged in a downward inclination to make the collected particles flow downward, the bottom inclined plate and each of the upper inclined plates are arranged in an upwardly arched arched plate, the arch apex fold line of the arched plate is arranged along the flue gas flow direction, and the bottom inclined plate and each of the upper inclined plates form a double-axial inclination structure; the inclined plate group is arranged on one side of the outlet of the flue gas settling passage and is provided with a tail baffle.

[0007] In a preferred embodiment of the present application, the tail baffle is arranged at a second included angle with the vertical plane, and the spacing between the tail baffle and each of the upper inclined plates and the bottom inclined plate is arranged to gradually increase from top to bottom.

[0008] In a preferred embodiment of the present application, the shallow inclined plate settling device further comprises a support rod structure, and the support rod structure supports the shallow settling units of each of the settling layers.

[0009] In a preferred embodiment of the present application, the shallow settling unit further comprises an inclined plate support, the inclined plate support supports the inclined plate group, and the inclined plate support is connected to the support rod structure.

[0010] In a preferred embodiment of the present application, the bottom inclined plate and each of the upper inclined plates are arranged at a first included angle with the horizontal plane; and the inclined plate support is connected and arranged on one side or both sides of the bottom inclined plate and each of the upper inclined plates.

[0011] In a preferred embodiment of the present application, the first included angle is greater than or equal to 30° and less than 90°.

[0012] In a preferred embodiment of the present application, the support rod structure comprises a rod body, the rod body is arranged at intervals and connected to units, and each of the connecting units is fixedly connected to the inclined plate support.

[0013] In a preferred embodiment of the present application, the connecting unit is a connecting rib plate, a clamping seat or a supporting seat.

[0014] In a preferred embodiment of the present application, the support rod structure comprises a front support rod column and a rear support rod column arranged in the flue gas circulation direction, and the front support rod column and the rear support rod column support the shallow settling units of each of the settling layers.

[0015] The object of the present application can also be achieved by a particle collection method, comprising: arranging the shallow inclined plate settling device as described above between the flue gas inlet and the flue gas outlet in the flue gas passage; the flue gas entering the flue gas passage through the flue gas inlet is decelerated by the flue gas deceleration structure and then flows to the shallow inclined plate settling device, the decelerated flue gas flows through the flue gas settling passage between the adjacent upper inclined plates of the shallow settling unit and between the bottom inclined plate and the upper inclined plate adjacent thereto, and is guided to flow to the flue gas outlet by the tail baffle; the particles in the flue gas settle on the side of the bottom inclined plate and the upper inclined plate close to the ash outlet, and the particles settled on the bottom inclined plate and the upper inclined plate flow downward to the ash outlet.

[0016] As described above, the shallow inclined plate settling device and the particle collection method of the present application have the following beneficial effects:

[0017] The shallow inclined plate settling device is arranged in the inclined plate settling area of the present application, and after the dust-containing flue gas enters the shallow inclined plate settling device at a low flow rate, the particles settle on the inclined plates to achieve separation of the dust particles; the shallow settling technology is adopted, and the shallow settling unit is arranged with a reasonable number of inclined plate layers and inclined plate spacing to ensure the settling effect;

[0018] The double-axial inclined structure of each inclined plate of the shallow settling unit can reduce the influence of steel plate deformation caused by high-temperature thermal stress on the settling and collection effect;

[0019] The tail baffle is arranged at the tail of the inclined plate group of the shallow settling unit, which not only plays a role in guiding the flue gas, but also prevents the direct scouring of the flue gas, especially high-temperature flue gas, on the next contact unit. BRIEF DESCRIPTION OF DRAWINGS

[0020] The following drawings are only intended to illustrate and explain the present application and do not limit the scope of the present application.

[0021] Wherein:

[0022] Figure 1 : is a schematic diagram of the shallow inclined plate settling device of the present application used in a cylindrical flue.

[0023] Figure 2 : is Figure 1 A-A sectional view in

[0024] Figure 3 : is a schematic diagram of the shallow settling unit of the present application.

[0025] Figure 4 : is Figure 3 B view.

[0026] Figure 5 : is a schematic diagram of the upper inclined plate of the present application in the form of an isosceles trapezoid with straight lines at the front and back edges.

[0027] Figure 6 Fig. 4 is a schematic view of the present application when the upper inclined plate is isosceles trapezoidal and the front and back edges are circular arcs.

[0028] In the figure:

[0029] 101, flue gas inlet; 102, flue gas outlet; 103, ash outlet;

[0030] 2, shallow inclined plate settling device;

[0031] 21, settling layer; 211, shallow settling unit; 2111, bottom inclined plate; 2112, upper inclined plate; 2113, inclined plate support; 2114, tail baffle;

[0032] 22, support rod structure; 221, front support rod column; 222, rear support rod column; 223, rod body; 224, connecting unit;

[0033] 3, cylindrical flue; 31, inner sleeve; 32, ash hopper; 33, outer sleeve; 34, flue gas flow structure. DETAILED DESCRIPTION

[0034] In order to have a clearer understanding of the technical features, objectives and effects of the present application, the specific embodiments of the present application will be described with reference to the accompanying drawings.

[0035] The specific embodiments of the present application described herein are for the purpose of explanation and illustration only and are not to be construed as limiting the present application in any way. Based on the teachings of the present application, those skilled in the art will be able to conceive any possible modifications of the present application, which are all deemed to fall within the scope of the present application. It should be noted that when an element is referred to as "provided on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "mounting", "connection", "connection" should be interpreted broadly, for example, it can be a mechanical connection or an electrical connection, it can be a connection between two elements, it can be directly connected or indirectly connected through a middle medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not indicate the only embodiment.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0037] As shown in Figures 1 to 6 The present application provides a shallow inclined plate settling device 2, which is arranged between the flue gas inlet 101 and the flue gas outlet 102 of a flue gas passage (a flue gas inlet 101, a flue gas outlet 102 and an ash outlet 103 are arranged on the flue gas passage), and is used for circulating flue gas and settling particles in the flue gas after deceleration. The area in which the shallow inclined plate settling device 2 is arranged in the flue gas passage constitutes an inclined plate settling area.

[0038] The shallow inclined plate settling device 2 comprises a plurality of settling layers 21 arranged in parallel and at intervals, each of the settling layers 21 comprises a plurality of shallow settling units 211 arranged in an inclined manner, the shallow settling unit 211 comprises an inclined plate group, the inclined plate group comprises a bottom inclined plate 2111 and a plurality of upper inclined plates 2112 arranged in parallel and at intervals, and a flue gas settling passage is formed between adjacent upper inclined plates 2112 and between the bottom inclined plate 2111 and the upper inclined plate 2112 adjacent thereto. The flow cross section of the flue gas settling passage is determined by the plate spacing, and the plate spacing is determined according to actual requirements, and the value range is generally 10mm≤b≤300mm.

[0039] The inclined plate group is arranged on one side of the inlet of the flue gas settling passage in a downward inclined manner to make the captured particles flow downward, that is, the bottom inclined plate 2111 and each upper inclined plate 2112 are arranged on one side close to the ash outlet 103 in a downward inclined manner to make the captured particles flow to the ash outlet, as shown in Figure 2 、 Figure 4 The bottom inclined plate 2111 and each upper inclined plate 2112 are arranged in an arched shape of an upward arch, and the arch top fold line of the arched shape is arranged along the flue gas flow direction. Each inclined plate (the bottom inclined plate 2111 and each upper inclined plate 2112) of the shallow settling unit 211 forms a double-axial inclined structure. In the prior art, when the high-temperature flue gas or the high-low-temperature flue gas periodically flows through the inclined plate settling area, the inclined plate is easily deformed under the action of thermal stress, which will have an adverse effect on the settling process of the particles and the process of the settled particles sliding downward and collecting. The bottom inclined plate 2111 and each upper inclined plate 2112 of the present application adopt a double-axial inclined structure, which can reduce the influence of deformation caused by high-temperature thermal stress on the settling and collecting effect.

[0040] As shown in Figure 2 、 Figure 3As shown, the tail baffle 2114 is arranged at the side of the outlet of the flue gas settling channel, that is, the tail baffle 2114 is arranged at the side away from the ash outlet 103 of the inclined plate group (the bottom inclined plate 2111 and each upper inclined plate 2112). In the prior art, after the high-temperature flue gas flows through the inclined plate settling area, it directly washes the next contact unit (such as the inner wall of the outer sleeve of the cylindrical flue), which aggravates the wear of the next contact unit (such as the inner wall of the outer sleeve of the cylindrical flue). The tail baffle 2114 plays a role of guiding the flue gas, and the tail baffle 2114 can reduce the direct washing and wear of the next contact unit (such as the inner wall of the outer sleeve of the cylindrical flue) when the high-temperature flue gas flows out of the shallow settling unit 211.

[0041] The shallow inclined plate settling device is arranged in the inclined plate settling area of the present application. After the dust-containing flue gas enters the shallow inclined plate settling device at a low flow rate, the particles are settled on the inclined plates to achieve separation of the dust particles; the shallow settling technology is adopted, and the shallow settling unit is arranged with reasonable number of inclined plate layers and inclined plate spacing to ensure the settling effect;

[0042] Each inclined plate of the shallow settling unit adopts a double-axial inclined structure, which can reduce the influence of steel plate deformation caused by high-temperature thermal stress on the settling and collecting effects;

[0043] The tail baffle is arranged at the tail of the inclined plate group of the shallow settling unit, which not only plays a role of guiding the flue gas, but also can prevent the direct washing of the flue gas, especially the high-temperature flue gas, on the next contact unit.

[0044] Further, as shown in Figure 3 The tail baffle 2114 is a steel plate, and the tail baffle 2114 is arranged at a second included angle β with the vertical plane, and the spacing between the tail baffle 2114 and each upper inclined plate 2112 and the bottom inclined plate 2111 is arranged from top to bottom in an increasing manner.

[0045] The cross-sectional area between the tail baffle 2114 and the bottom inclined plate 2111 is not less than the cross-sectional area of the flue gas inlet of each shallow settling unit 211, so as to keep the speed of the flue gas flowing out of the shallow inclined plate settling device 2 as low as possible. After the flue gas flows out of the inclined plate group, it meets the tail baffle 2114, changes the flow direction of the flue gas, and avoids the direct washing of the next contact unit.

[0046] Further, a handle is arranged on the non-windward surface of the tail baffle 2114, which facilitates the hoisting of the single shallow settling unit 211.

[0047] Further, as shown in Figure 1 , Figure 2 The shallow inclined plate settling device further includes a support rod structure 22 arranged in the flue gas channel, and the support rod structure 22 supports and connects the shallow settling units 211 of each settling layer.

[0048] Further, the bottom inclined plate and each upper inclined plate are arranged to be inclined to the horizontal plane at a first included angle a; one side or both sides of the bottom inclined plate 2111 and each upper inclined plate 2112 are connected to an inclined plate support 2113.

[0049] In a specific embodiment of the present application, the first included angle a is greater than or equal to 30° and less than 90°. The second included angle β is in the range of 0°≦β<(90°-a).

[0050] Further, the bottom inclined plate 2111 and each upper inclined plate 2112 are made of steel plate; the inclined plate support 2113 is made of steel plate, angle steel, channel steel, square steel or round steel and is connected to the support rod structure 22 by welding or clamping groove and the like.

[0051] The bottom inclined plate 2111 and each upper inclined plate 2112 are of the same or similar shape. The definition of the front and back of the steel plate is consistent with the direction of the flue gas flow; the front width w1 of the steel plate is generally 100-500 mm, the length l of the steel plate is 100-1500 mm, and the back width w2 of the steel plate depends on the diameter of the inner cylinder and the length of the steel plate and is generally 100-700 mm. In a cylindrical flue, the bottom inclined plate 2111 and each upper inclined plate 2112 are isosceles trapezoidal steel plates; in a rectangular flue, the bottom inclined plate 2111 and each upper inclined plate 2112 are rectangular or isosceles trapezoidal steel plates according to the flow area before and after the flue gas flows through the shallow layer settling device.

[0052] The isosceles trapezoidal steel plate / rectangular steel plate is bent along the center line of the trapezoid / rectangle to form an arched folded plate (two small inclined surfaces with a small inclination angle, with the center line being high and the waist being low), and the profile of the left and right waist edges (the two sides between the front and back of the steel plate) / the left and right side edges of the rectangular steel plate is processed by chamfering, reserving support clamping grooves, smoothing and reducing, etc. according to the size and position of the inclined plate support 2113.

[0053] A front left support and a front right support are arranged at a position close to the waist edge of the bottom inclined plate 2111 and each upper inclined plate 2112, and the two supports are connected to the bottom inclined plate 2111 and each upper inclined plate 2112 in sequence. The front left support and the front right support (inclined plate support 2113) can be steel plates, support rods, angle steels, channel steels, etc., and are connected by welding or by arranging clamping grooves on the bottom inclined plate 2111 or each upper inclined plate 2112. A rear left support and a rear right support are arranged at a position close to the back of the bottom inclined plate 2111 and each upper inclined plate 2112.

[0054] Further, as shown in Figure 5 , Figure 6 The support rod structure 22 includes a rod body 223, and a connecting unit 224 is arranged on the rod body at intervals; the inclined plate support 2113 is fixedly connected to each connecting unit.

[0055] In the embodiment, the rod body can be in the form of a steel pipe, a water-cooled pipe, a round steel, etc., the connecting unit is a connecting rib plate, a clamping seat or a supporting seat, and the rod body is provided with the connecting unit at different positions to support the shallow settlement unit 211.

[0056] The application also provides a particle collection method based on shallow inclined plate settlement, which comprises: arranging the aforementioned shallow inclined plate settlement device 2 between the flue gas inlet 101 and the flue gas outlet 102 in the flue gas passage; the flue gas entering the flue gas passage through the flue gas inlet is decelerated by the flue gas deceleration structure and then flows to the shallow inclined plate settlement device 2; the decelerated flue gas flows through the flue gas settlement passage between the adjacent upper inclined plates 2112 of the shallow settlement unit 211, between the bottom inclined plate 2111 and the upper inclined plate 2112 adjacent thereto, and is guided to flow to the flue gas outlet through the tail baffle 2114; the particles in the flue gas settle on the side of the bottom inclined plate 2111 and the upper inclined plate 2112 close to the ash outlet, and the particles settled on the bottom inclined plate 2111 and the upper inclined plate 2112 flow downward to the ash outlet.

[0057] Embodiment one:

[0058] As shown in Figure 1 , the flue gas passage is a cylindrical flue 3, which comprises an inner sleeve 31, a hopper 32 arranged below the inner sleeve 31, the top end of the hopper 32 having a diameter greater than the outer diameter of the inner sleeve 31; the outer side of the inner sleeve 31 and the hopper 32 is arranged with an outer sleeve 33 at a radial interval, the top end of the inner sleeve 31 is arranged with a flue gas inlet 101, the side wall of the inner sleeve 31 is arranged with a flue gas flow structure 34 in communication, the flue gas flow structure 34 is used to decelerate and guide the flue gas in the inner sleeve 31 to the outer sleeve to form a flue gas deceleration structure, the bottom end of the outer sleeve 33 is arranged with a flue gas outlet 102, the bottom end of the hopper 32 is exposed to the bottom end of the outer sleeve 33, and the bottom end of the hopper 32 is arranged with an ash outlet 103;

[0059] The shallow inclined plate settlement device 2 is arranged between the flue gas flow structure 34 and the inner wall of the outer sleeve 33, the side of the bottom inclined plate 2111 and each upper inclined plate 2112 close to the inner sleeve 31 is arranged above the hopper 32, and the side of the bottom inclined plate 2111 and each upper inclined plate 2112 close to the inner sleeve 31 is arranged to be downwardly inclined to make the collected particles flow to the ash outlet 103; the side of the bottom inclined plate 2111 and each upper inclined plate 2112 away from the inner sleeve 31 is arranged with a tail baffle 2114; the bottom inclined plate 2111 and each upper inclined plate 2112 are arranged in the form of an arched baffle, and the arch top fold line of the arched baffle extends from the inner sleeve 31 to the outer sleeve 33.

[0060] Further, as shown in Figure 1 , Figure 2As shown, the axial support rod structure 22 is arranged between the flue gas flow structure 34 and the inner wall of the outer sleeve 33, and the support rod structure 22 includes a front support rod row 221 and a rear support rod row 222 arranged in the flue gas flow direction, and the front support rod row 221 and the rear support rod row 222 support and connect the shallow layer settling units 211 of each settling layer.

[0061] In the inclined plate settling area, the support rod structure 22 is formed by the inner and outer two circles (the front support rod row 221 and the rear support rod row 222) of the cooling pipe components penetrating from top to bottom, and a plurality of groups of shallow layer settling units are arranged in a ring shape from top to bottom to form the shallow layer inclined plate settling device 2, and the ring-shaped inclined plate settling area is formed.

[0062] The inclined plate group includes an upper inclined plate 2112 (a≥1) and a bottom inclined plate 2111, the inclined plate support 2113 includes a front left support, a front right support, a rear left support and a rear right support, and the tail baffle 2114 is connected with the rear right support.

[0063] Taking the particle trapping device after the vaporization and cooling of the converter flue gas as an example, the inner sleeve of the particle trapping device has a specification of DN2300mm, and two circles of cooling pipe components (the front support rod row 221 and the rear support rod row 222) are uniformly arranged between the inner sleeve 31 and the outer sleeve 33 and penetrate the inclined plate settling area from top to bottom, and each circle of cooling pipe components (the front support rod row 221 and the rear support rod row 222) is composed of 24 water-cooled heating pipes (rod bodies).

[0064] Each water-cooled heating pipe (rod body) of the inner and outer circles (the front support rod row 221 and the rear support rod row 222) is uniformly arranged with nine light support seats and slot seats (connecting units) from top to bottom for supporting a single shallow layer settling unit 211. Nine layers of shallow layer settling units 211 are arranged from top to bottom between the inner and outer two circles of cooling pipe components (the front support rod row 221 and the rear support rod row 222), and each layer is uniformly arranged in a ring shape, and the shallow layer inclined plate settling device 2 is formed, and the inclined plate settling area is formed.

[0065] Each shallow layer settling unit 211 has the same specification, the inclined plate group includes five upper inclined plates 2112 and a bottom inclined plate 2111, and the inclined plate support 2113 includes a front left support, a front right support and a rear support frame. The rear support frame includes a rear left support, a rear right support, a tail baffle 2114, a positioning hook pin and a mounting handle.

[0066] The upper inclined plate 2112 and the bottom inclined plate 2111 are isosceles trapezoidal steel plates with the front edge narrower than the rear edge, Figure 5 It is a schematic view of the upper inclined plate of the present application in the form of an isosceles trapezoid with straight front and rear edges, Figure 6Figure 2 is a schematic view of the isosceles trapezoidal upper inclined plate of the present application, wherein the front and rear edges are circular arcs; the front edge of the isosceles trapezoidal steel plate is 300 mm wide, the length of the isosceles trapezoidal steel plate is 600 mm, and the rear edge of the isosceles trapezoidal steel plate is 500 mm wide. The isosceles trapezoidal steel plate is folded along the center line of the trapezoid to form an arched folded plate (two small inclined surfaces with a center line high and a waist edge low), the front edge width after folding is 280 mm, and the rear edge width is 480 mm. The profile of the left and right waist edges (the two sides between the front and rear directions of the steel plate) is processed according to the size and position of the inclined plate support 2113, such as blunt, smooth reduction, etc., and the bottom inclined plate 2111 also needs to reserve a support slot at the waist edge.

[0067] The first included angle a between the five-layer upper inclined plate 2112 and the bottom inclined plate 2111 and the horizontal plane is 45°, and the two inclined surfaces (the two sides of the arch top fold line of the arched folded plate) of the inclined plate itself form a double-axis inclined plate group.

[0068] The spacing b between adjacent upper inclined plates 2112 and between the bottom inclined plate 2111 and the adjacent upper inclined plate 2112 is 70 mm, front left and right supports are provided at the front position of the waist edge of the bottom inclined plate 2111 and each upper inclined plate 2112, the front left and right supports are both heat-resistant steel plates, and a rear support frame is provided at the rear edge of the inclined plate group. The rear support frame includes a left rear support plate and a right rear support plate, both of which are steel plates, the upper and lower sides of the left rear support plate and the right rear support plate are parallel to the upper inclined plate 2112 (the bottom inclined plate 2111), one side edge in the vertical direction of the left rear support plate and the right rear support plate is provided with a clamping slot for connecting each layer of inclined plate (the bottom inclined plate 2111 and each upper inclined plate 2112), and a positioning hook pin is provided at the lower end of the side edge, and the other side in the vertical direction is connected with the tail baffle 2114.

[0069] The tail baffle 2114 is also a steel plate, the second included angle β between the tail baffle 2114 and the vertical plane is 10°, and the spacing between the tail baffle 2114 and the rear edge of each inclined plate is arranged in an increasing manner from top to bottom. Two installation handles are provided on the non-windward surface of the tail baffle 2114 to facilitate the hoisting of a single shallow layer settling unit.

[0070] In the above embodiment, the steel plate used is a heat-resistant steel plate. The single shallow layer settling unit 211 is supported in the particle trapping device through the connection between the bottom inclined plate and the smooth seat and clamping seat reserved on the cold pipe.

[0071] As described above, the shallow layer inclined plate settling device and the particle trapping method of the present application have the following beneficial effects:

[0072] The shallow inclined plate settling device is arranged in the inclined plate settling area of the application, and the dust-containing flue gas enters the shallow inclined plate settling device at a low flow rate, and the particles are settled on the inclined plate to realize the separation of the dust particles; the shallow settling technology is adopted, and the shallow settling unit is arranged with reasonable inclined plate layers and inclined plate spacing to ensure the settling effect;

[0073] Each inclined plate of the shallow settling unit adopts a double-axial inclined structure, which can reduce the influence of the steel plate deformation caused by the high-temperature thermal stress on the settling and collecting effects;

[0074] The tail baffle is arranged at the tail of the inclined plate group of the shallow settling unit, which not only plays a role of guiding the flue gas, but also can prevent the direct scouring of the flue gas, especially the high-temperature flue gas, on the next contact unit.

[0075] The above is only a specific embodiment of the application, and is not used to limit the scope of the application. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the application shall belong to the protection scope of the application.

Claims

1. A shallow inclined plate settlement device, characterized in that: The smoke generating device further comprises a pair of stepping-up fans, wherein the step of cool, cool and humidifying screens the smoke from entering the smoke filter, the step of cool, coolant transferring the smoke into the smoke filter, the step of cool, coolant transferring the smoke into the smoke filter, and the step of cool, coolant transferring the smoke into the smoke filter. The tail baffle is inclined at a second angle to the vertical plane, and the distances between the tail baffle and each of the upper inclined plates and the bottom inclined plate are gradually increased from top to bottom; It also includes a support rod structure, on which the shallow sedimentation units of each sedimentation layer are supported and connected; The shallow settlement unit further comprises an inclined plate support member, the inclined plate support member is supported and connected to the inclined plate group, and the inclined plate support member is connected to the support rod structure; The bottom inclined plate and each of the upper inclined plates are inclined at a first angle to the horizontal plane; the inclined plate support member is connected to one side or both sides of the bottom inclined plate and each of the upper inclined plates; The first angle is greater than or equal to 30° and less than 90°; Assume the first angle is α and the second angle is β, then 0°﹤β﹤(90°-α).

2. The shallow inclined plate settlement device according to claim 1, characterized in that: The support rod structure includes a rod body, and connecting units are arranged at intervals on the rod body. Each of the connecting units is fixedly connected to the inclined plate support member.

3. The shallow inclined plate settlement device according to claim 2, characterized in that: The connecting unit is a connecting rib, a clamping seat or a bracket.

4. The shallow inclined plate settlement device according to claim 1, characterized in that: The support rod structure includes a front support rod row and a rear support rod row arranged along the smoke flow direction, and the front support rod row and the rear support rod row support the shallow sedimentation units connected to each of the sedimentation layers.

5. A particle capture method, characterized in that: The method comprises arranging a shallow inclined plate settling device according to any one of claims 1 to 4 between a smoke inlet and a smoke outlet in a smoke channel; The flue gas entering the flue gas channel through the flue gas inlet is decelerated by the flue gas deceleration structure and then flows to the shallow inclined plate sedimentation device. The decelerated flue gas flows through the flue gas sedimentation channels between adjacent upper inclined plates of the shallow sedimentation unit and between the bottom inclined plate and the upper inclined plate adjacent thereto, and is guided to the flue gas outlet through the tail deflector; the particles in the flue gas settle on the side of the bottom inclined plate and the upper inclined plate close to the ash outlet, and the particles settled on the bottom inclined plate and the upper inclined plate flow downward to the ash outlet.

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