A dry quenching primary dust removal device

Abstract

The present application relates to a kind of dry quenching primary dust removal device, including dust removal passage, dust suppression net, retaining wall, large hopper and sub hopper;Dust removal passage is composed of vault, side wall, dust removal side straight section and boiler side straight section;Dust suppression net is hung on the left inner wall of vault;Retaining wall is "eight" character structure, is set in the left side end of dust removal side straight section, and the "eight" character small mouth end of retaining wall is towards left side;The "eight" character big mouth end of dust removal side straight section near retaining wall is respectively provided with one sub hopper.The dust suppression net or "eight" character retaining wall of the present application is set in the upper and lower sides of the outlet end of dry quenching, can reduce the speed of dust flying, change the flight path of dust, improve dust removal pertinence and dust removal effect;Sub hopper is set in dust falling place, and multiple hoppers collect coke powder more timely, avoid the problems such as that the flow area becomes small, gas flow rate becomes fast, and coke powder is wrapped up and carried to fly again.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dust removal equipment, in particular to a dry quenching primary dust removal device. BACKGROUND

[0002] At present, the dry quenching primary dust remover is mostly a process equipment for dust removal treatment of dry quenching circulating gas by using gravity dust removal principle, which can be mainly divided into large baffle wall, no baffle wall and staggered difference structure according to structural form. The dust remover with large baffle wall structure is prone to deformation and damage due to large wind receiving surface and large expansion, and has high maintenance cost, while the dust removal efficiency of the dust remover with no baffle wall and staggered difference structure is low, the dust removal effect is poor, and the influence on subsequent equipment is large. In addition, a single dust hopper is usually arranged, and the coke powder is not collected in time, which easily causes coke powder accumulation to reduce the flow area and increase the gas flow rate, and the coke powder is easily wrapped and flown again.

[0003] It is found through computer simulation that most of the coke powder in the dry quenching production operation process mainly flies out along the upper and lower sides of the dry quenching outlet, and most of the coke powder falls in the straight section of the primary dust remover in advance to form accumulation, thereby reducing the flow area of the circulating gas of the dust remover and reducing the dust removal effect. If the flight speed of the above coke powder can be effectively blocked or reduced through collision, or the flight path of the coke powder can be changed, and the accumulated coke powder can be timely removed, the dust removal efficiency of the dry quenching gravity dust remover can be greatly improved, and the abrasion of the subsequent boiler pipeline by the large particle coke powder can be avoided. SUMMARY

[0004] In order to overcome the defects in the prior art, the technical problem to be solved by the present application is to provide a dry quenching primary dust removal device, a dust suppression net or an "eight" shaped baffle wall is arranged on the upper and lower sides of the dry quenching outlet end, the flight speed of the dust can be reduced, the flight path of the dust can be changed, the dust removal pertinence and the dust removal effect can be improved, dust hoppers are arranged in the dust falling place in a targeted manner, the coke powder can be collected in multiple dust hoppers more timely, and the problems of coke powder accumulation, small flow area, fast gas flow rate and secondary flying of the coke powder wrapped can be avoided.

[0005] In order to achieve the above purpose, the following technical scheme is adopted in the present application:

[0006] A dry quenching primary dust removal device, comprising a dust removal channel, a dust suppression net, a baffle wall, a large dust hopper and a dust distribution hopper; the dust removal channel is composed of a vault, a side wall, a dust removal side straight section and a boiler side straight section, wherein the dust removal side straight section and the boiler side straight section are arranged on the two sides of the large dust hopper respectively, the side wall is two, is arranged on the two sides of the dust removal side straight section and the boiler side straight section in a symmetrical and vertical manner, and the vault is arranged on the two side walls; the dust suppression net is hung on the inner wall of the left side of the vault; the baffle wall is in an "eight" shaped structure, is arranged on the left side end of the dust removal side straight section, and the small opening end of the "eight" shaped baffle wall faces the left side; and the "eight" shaped large opening end of the dust removal side straight section near the baffle wall is respectively provided with one dust distribution hopper.

[0007] Further, the dust catching net can be a net structure, or a structure similar to the net structure formed by a chain of several strip fins uniformly distributed along the section of the dust removal channel.

[0008] Further, the length of the dust catching net from the vault to the bottom is 300mm to three fourths of the net height of the vault.

[0009] Further, the height of the retaining wall is 100mm to the top of the vault.

[0010] Further, the outer side of the "8" shaped retaining wall is provided with several uniformly distributed hemispherical pits.

[0011] Further, the large hopper and the sub-hoppers are both conical funnel structures, and the angle between the left side and the horizontal is smaller than the angle between the right side and the horizontal.

[0012] Further, the arc structure of the vault can be flush or staggered.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] 1) The present application does not use the existing structure of suspending a vertical retaining wall above the hopper, but uses a front dust catching net structure, which can achieve the effect of the retaining wall and reduce the total resistance of the dust remover and improve the dust removal effect.

[0015] 2) The present application sets up an effective barrier according to the trajectory of the dry quenching coke dust, i.e. sets up a dust catching net or an "8" shaped retaining wall on both sides of the dry quenching coke outlet, so as to reduce the flying speed of the dust and change the flying path of the dust, so that the dust falls into the hopper to achieve the purpose of dust removal. The dust removal process of this structure is more targeted.

[0016] 3) The present application sets up a hopper where the dust is easy to fall according to the need, and the multiple hoppers collect coke powder more timely, avoiding the problems of small flow area, fast gas flow speed, secondary flying of coke powder and other problems caused by coke powder accumulation. BRIEF DESCRIPTION OF DRAWINGS

[0017] The accompanying drawings, which form a part of this application, are included to provide a further understanding of the application and are incorporated in and constitute a part of this application. The embodiments of the present application illustrated in the drawings and their descriptions are used to explain the present application and do not limit the present application in any way. In the drawings:

[0018] Figure 1 is a schematic front view of the structure of a dry quenching coke primary dust removal device of the present application;

[0019] Figure 2It is a structure principle schematic left view of a dry quenching primary dust removal device of the present application.

[0020] Figure 3 It is Figure 1 The structure principle schematic view of the B-B section.

[0021] Explanation of reference signs:

[0022] In the figure: 1 - vault, 2 - side wall, 3 - dust removal side straight section, 4 - boiler side straight section, 5 - large hopper, 6 - dust suppression net, 7 - retaining wall, 8 - dust hopper. DETAILED DESCRIPTION

[0023] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0024] In the description of the present application, it should be understood that the terms "left", "right", "horizontal", "vertical", "up", "down", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] The specific embodiments of the present application will be further described below in conjunction with the drawings:

[0026] See Figures 1-3 The present application relates to a dry quenching primary dust removal device, which comprises a dust removal channel, a dust suppression net 6, a retaining wall 7, a large hopper 5 and a dust hopper 8. The dust removal channel is composed of a vault 1, a side wall 2, a dust removal side straight section 3 and a boiler side straight section 4. The dust removal side straight section 3 and the boiler side straight section 4 are arranged on the two sides of the large hopper 5 respectively. The side wall 2 is symmetrical and vertically arranged on the two sides of the dust removal side straight section 3 and the boiler side straight section 4. The vault 1 is located on the two side walls 2. The dust suppression net 6 is hung on the inner wall of the left side of the vault 1. The retaining wall 7 is in the shape of an "eight", which is arranged at the left end of the dust removal side straight section 3, and the small end of the "eight" shape of the retaining wall 7 faces the left side, i.e. the outlet side of the dry quenching furnace. The "eight" shaped large end of the retaining wall 7 near the dust removal side straight section 3 is provided with a dust hopper 8. The dust hopper is arranged at the place where the dust falls. Multiple dust hoppers can collect coke powder more timely, avoiding the problems of small flow area, fast gas flow speed, secondary flying of coke powder and the like caused by coke powder accumulation.

[0027] Furthermore, the dust collection net 6 can be a mesh structure, or it can be a mesh-like structure formed by several finned chains evenly distributed in a line along the cross-section of the dust collection channel. One end of the chain is fixed to the inner wall of the arch 1, and the other end hangs down naturally. The dust collection net 6 can not only achieve the effect of the original dust collector retaining wall, but also reduce the total resistance of the dust collector and improve the dust collection effect.

[0028] Furthermore, the length of the dust-collecting net 6 hanging down from the arch 1 is 300mm to three-quarters of the net elevation of the arch 1.

[0029] Furthermore, the height of the retaining wall 7 is 100mm to the top of the arch 1.

[0030] Furthermore, the outer surface of the "eight"-shaped retaining wall 7 is provided with several evenly distributed hemispherical pits, which can effectively reduce the flight speed of dust and change the flight path of dust.

[0031] Furthermore, both the large ash hopper 5 and the ash distribution hopper 8 are conical funnel-shaped structures, and the left side ( Figure 1 As shown (i.e., the direction from which the dust flies), the angle between the right side and the horizontal is smaller than the angle between the right side and the horizontal, which is beneficial for dust collection.

[0032] Furthermore, the arch 1 is an arc-shaped structure, which can be set to be flush or staggered.

[0033]

Example

[0034] A primary dust removal device for dry quenching coke includes a dust removal channel, a dust collection net 6, a retaining wall 7, a large ash hopper 5, and a separating ash hopper 8. The dust removal channel consists of an arched roof 1, side walls 2, a dust removal side straight section 3, and a boiler side straight section 4. The dust removal side straight section 3 and the boiler side straight section 4 are respectively arranged on both sides of the large ash hopper 5. There are two side walls 2, which are symmetrically and vertically arranged on both sides of the dust removal side straight section 3 and the boiler side straight section 4. The arched roof 1 sits on the two side walls 2. The dust collection net 6 is suspended on the inner left side of the arched roof 1. The retaining wall 7 has an "eight" shaped structure and is located at the left end of the dust removal side straight section 3, with the smaller opening of the "eight" shape of the retaining wall 7 facing to the left, i.e., the dry quenching furnace outlet side. A separating ash hopper 8 is provided at the larger opening of the "eight" shape of the dust removal side straight section 3 near the retaining wall 7.

[0035] The height of the retaining wall 7 is 120mm. The dust collection net 6 is a mesh-like structure formed by several finned chains evenly distributed in a line along the cross-section of the dust collection channel. One end of the chain is fixed to the inner wall of the arch 1, and the other end hangs down naturally. After installation, the distance between the lower end of the chain and the upper end of the retaining wall 7 is 100mm.

[0036] The left end of the dust collector is connected to the outlet of the dry quenching furnace via a high-temperature expansion joint, and the right end of the dust collector is connected to the waste heat boiler via a high-temperature expansion joint.

[0037] The circulating gas from the dry quenching furnace outlet flows from the left end of the dust collector to the right end. The dust screen 6 suspended on the arch 1 plays a blocking and guiding role for the upper circulating gas. The dust in the circulating gas slows down after hitting the dust screen 6 and changes direction downward under the action of inertia, and disturbs the middle and lower circulating gas to slow down or change direction, and finally settles to the dust removal side straight section 3 under the action of gravity and is discharged through the large ash chute 5 or the sub ash chute 8. The "eight" shaped retaining wall 7 plays a blocking and guiding role for the lower circulating gas. The dust in the circulating gas slows down after hitting the semispherical pit on the retaining wall 7 and changes direction downward, upward or to both sides of the two side walls 2 under the action of inertia, and disturbs the circulating gas near the middle or lower two side walls 2 to slow down or change direction, and finally settles to the dust removal side straight section 3 under the action of gravity and is discharged through the large ash chute 5 or the sub ash chute 8. The circulating gas after primary dust removal flows out through the right end of the dust collector and enters the subsequent waste heat boiler.

[0038] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A primary dust removal device for dry quenching coke, characterized in that, It includes a dust removal channel, a dust collection net, a retaining wall, a large ash hopper, and a ash distribution hopper. The dust removal channel consists of an arched roof, side walls, a dust removal side straight section, and a boiler side straight section. The dust removal side straight section and the boiler side straight section are respectively arranged on both sides of the large ash hopper. There are two side walls, symmetrically and vertically arranged on both sides of the dust removal side straight section and the boiler side straight section. The arched roof sits on the two side walls. The dust collection net is suspended on the inner wall on the left side of the arched roof. The retaining wall has an "eight" shaped structure and is located at the left end of the dust removal side straight section, with the smaller opening of the "eight" shape facing to the left. An ash distribution hopper is set at the larger opening of the "eight" shape near the retaining wall of the dust removal side straight section. The outer surface of the retaining wall, which is shaped like the number "8", has several evenly distributed hemispherical recesses. The height of the retaining wall is 100mm to the top of the arch.

2. The dry quenching coke primary dust removal device according to claim 1, characterized in that, The dust collection net is a mesh structure, or a mesh-like structure formed by several finned chains evenly distributed in a line along the cross-section of the dust collection channel, wherein one end of the chain is fixed to the arch and the other end hangs down naturally.

3. The dry quenching coke primary dust removal device according to claim 1, characterized in that, The length of the dust suppression net hanging down from the arch is 300mm, which is three-quarters of the net elevation of the arch.

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