In-situ transformation type converter gas treatment system

Abstract

The utility model belongs to the technical field of converter gas treatment, and relates to an in-situ transformation type converter gas treatment system. The system comprises a vaporization flue, a first connecting flue, a cyclone dust collector, a second connecting flue and a tempering dust collector which are connected in sequence. A first sub-flue in the vaporization flue is connected with a U-shaped second sub-flue through a horizontal flange face, the cyclone dust collector is arranged at the position of an original evaporative cooler or a Venturi water spraying device, the second sub-flue rotates around a circle center shaft of the horizontal flange face, and a coal gas outlet of the second sub-flue is made to horizontally move to the inclined upper portion from the right upper portion of the cyclone dust collector. A coal gas outlet in the top of the cyclone dust collector is connected to a coal gas inlet in the top of the tempering dust collector through a second connecting flue. The technical problem that the interface dislocation requirement of new and old equipment is not matched with the installation space during in-situ transformation in a compact space is solved.

Description

Technical Field

[0001] This utility model belongs to the field of converter gas treatment technology, and in particular relates to an in-situ modified converter gas treatment system. Background Technology

[0002] During the oxygen blowing steelmaking process in a converter, crude kerosene gas containing a large amount of CO is generated at temperatures as high as 1450℃-1600℃. To protect downstream equipment and recover energy, the crude kerosene gas is typically cooled by a gasification flue boiler (hereinafter referred to as the gasification flue) installed above the converter, and its heat is recovered to produce steam. The temperature of the gas at the outlet of the gasification flue is around 1000℃, and it contains a large amount of dust. To treat the gas at the outlet of the gasification flue, dry dust removal or wet dust removal processes are generally used. When a dry dust collector is connected to the outlet of the vaporization flue, the equipment directly connected to the outlet is an evaporative cooler. The evaporative cooler removes dust by spraying water to cool the flue and by gravity settling, resulting in the direct waste of the sensible heat of the flue gas in the 250℃-1000℃ range. When a wet dust collector is connected to the outlet of the vaporization flue, the equipment directly connected to the outlet is a Venturi spray system. The Venturi spray system washes the flue gas by spraying water under high pressure, similarly resulting in the direct waste of the sensible heat of the flue gas in the 250℃-1000℃ range.

[0003] To improve energy efficiency, the industry has proposed gas treatment devices integrating fire-tube evaporators and cyclone dust collectors. See Chinese patent application CN121380490A for a treatment device for the outlet gas of a converter high-temperature vaporization flue boiler. This device can achieve cascaded recovery of the sensible heat of the gas from 250℃ to 1000℃ and reduce water consumption. To upgrade the converter gas treatment system, given the compact layout and limited space of the converter workshop, it is necessary to perform "in-situ modification" of the existing converter workshop to form the aforementioned gas treatment device. However, "in-situ modification" faces severe challenges due to space limitations.

[0004] Specifically, such as Figure 1 and Figure 2 As shown, the existing dry or wet dust removal systems in the converter workshop are already fixedly installed, with the outlet of the vaporization flue vertically downwards connected to the top inlet of the evaporative cooler or Venturi spray device. During the in-situ modification, the evaporative cooler or Venturi spray device needs to be replaced with a cyclone dust collector with a high coarse ash removal rate. Because the gas inlet of the cyclone dust collector is located on its side, and the diameter of the cyclone dust collector is often close to the diameter of the evaporative cooler and Venturi spray device, there is a significant spatial offset between the outlet position of the vaporization flue and the gas inlet position of the cyclone dust collector. Furthermore, the space below the outlet of the vaporization flue is limited, making it inconvenient to arrange the connecting pipes between the vaporization flue and the cyclone dust collector. In addition, the vaporization flue occupies the vertical space above the cyclone dust collector, which is detrimental to the installation of the fire-tube evaporator.

[0005] Therefore, there is an urgent need for an in-situ modified converter gas treatment system. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an in-situ modified converter gas treatment system, which solves the technical problems of interface misalignment and spatial mismatch between new and old equipment during the in-situ modification process.

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] This utility model provides an in-situ modified converter gas treatment system, including a vaporization flue, a first connecting flue, a cyclone dust collector, a second connecting flue, and a conditioning dust collector; the vaporization flue includes a first sub-flue and a second sub-flue in sequence along the gas flow direction, the second sub-flue has a U-shaped structure with the opening facing downward, and the connection surface between the outlet of the first sub-flue and the inlet of the second sub-flue is a horizontal flange surface.

[0009] The cyclone dust collector is located at the position of the evaporator cooler of the original dry dust removal system or the position of the Venturi spray device of the original wet dust removal system. The gas inlet of the cyclone dust collector is located on its side. The gas outlet of the second sub-flue after rotating around the central axis of the horizontal flange is located diagonally above the cyclone dust collector and is connected to the gas inlet of the cyclone dust collector through the first connecting flue.

[0010] The top outlet of the cyclone dust collector is connected to the top inlet of the conditioning dust collector via a second connecting flue. At least one fire-tube evaporator is arranged along the gas flow direction on the second connecting flue, and the at least one fire-tube evaporator is located directly above the cyclone dust collector and / or the conditioning dust collector.

[0011] Optionally, the horizontal flange face is provided with a plurality of bolt holes evenly distributed along the circumferential direction, and the rotation of the second sub-flue is achieved by rotating a number of bolt hole positions around the central axis of the horizontal flange face around the inlet of the second sub-flue.

[0012] Optionally, the horizontal distance between the gas outlet center of the second sub-flue after rotation around the central axis of the horizontal flange surface and the gas inlet of the cyclone dust collector is greater than the radius of the second sub-flue.

[0013] Optionally, the horizontal distance between the gas outlet center of the second sub-flue after rotation around the central axis of the horizontal flange surface and the gas inlet of the cyclone dust collector is 1.1-1.8 times the radius of the second sub-flue.

[0014] Optionally, the second sub-flue rotates in the direction of the outer wall of the converter workshop; wherein the outer wall of the converter workshop is the wall used to separate the outdoor environment from the converter workshop.

[0015] Optionally, a first explosion relief valve is installed at the highest point of the second sub-flue, and a fire-extinguishing sprinkler system for extinguishing sparks in the pipe section is installed on the second sub-flue.

[0016] Optionally, the cyclone dust collector is installed at the location of the evaporator cooler in the original dry dust removal system, and the conditioning dust collector is installed at the location of the raw coal gas pipeline in the original dry dust removal system. The bottom ash outlets of the cyclone dust collector and the conditioning dust collector are both connected to the ash discharge device.

[0017] Optionally, the ash discharge device is the banana-bend ash discharge mechanism used in the original dry dust removal system to connect the evaporative cooler and the raw coal gas pipeline. The horizontal channel of the banana-bend ash discharge mechanism is equipped with an openable and closable partition. When the partition is closed, the horizontal channel is divided into a first ash storage area and a second ash storage area that are not connected to each other. The first ash storage area is connected to the bottom ash discharge port of the cyclone dust collector, and the second ash storage area is connected to the bottom ash discharge port of the conditioning dust collector. When the partition is opened, the first ash storage area and the second ash storage area are connected.

[0018] Optionally, the partition is hinged to the inner wall of the horizontal channel via a rotating shaft, and the partition can be switched between a vertically closed state and an open state by rotating the partition.

[0019] Optionally, the cyclone dust collector is installed at the location of the Venturi spray device in the original wet dust collection system, and the conditioning dust collector is installed at the location of the dewatering device in the original wet dust collection system. The bottom ash outlet of the cyclone dust collector and the bottom ash outlet of the conditioning dust collector are both connected to the ash discharge device.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides an in-situ modified converter gas treatment system that cleverly achieves spatial reconstruction by utilizing a rotatable horizontal flange connection between the first and second sub-flues of the vaporization flue as a rotation hub. Specifically, by rotating the second sub-flue, its outlet is moved from directly above the cyclone dust collector to a position slightly above it (i.e., to the side), successfully freeing up the vertical space directly above the cyclone dust collector and providing installation space for the fire-tube evaporator. Simultaneously, the newly added first connecting flue smoothly connects the outlet of the moved second sub-flue to the side inlet of the cyclone dust collector, solving the core problems of interface misalignment and spatial incompatibility between the old and new equipment. This in-situ modified converter gas treatment system fully utilizes the existing vaporization flue with minimal modifications, facilitating in-situ modification of the gas treatment system and ultimately achieving the cascade recovery of waste heat from the low-temperature gas in the converter and the recovery of usable dust. Attached Figure Description

[0022] This utility model is described with reference to the following drawings:

[0023] Figure 1 This is a schematic diagram of the original dry dust removal system according to a specific implementation method;

[0024] Figure 2 for Figure 1 A top view of the overall structure of the second flue and evaporative cooler;

[0025] Figure 3 This is a structural schematic diagram of an in-situ modified converter gas treatment system according to a specific implementation method; to clearly show the overall structure, the right half of the second sub-flue that blocks the first-stage fire tube evaporator is omitted in the figure;

[0026] Figure 4 for Figure 3 A top view of the overall structure of the second flue and cyclone dust collector;

[0027] Figure 5 This is another structural schematic diagram of the in-situ modified converter gas treatment system according to a specific implementation method; to fully show the direction of the second sub-flue and the first connecting flue, this diagram schematically increases the horizontal distance between the second sub-flue and the cyclone dust collector, and the view direction is also adjusted.

[0028] Figure 6 This is a structural schematic diagram of the horizontal flange face according to a specific embodiment, which shows the angular relationship of the second sub-flue rotating around the central axis of the horizontal flange face by six bolt hole positions;

[0029] Figure 7 A schematic diagram showing the relative positions of the horizontal flange face, the outlet of the second sub-flue, and the cyclone dust collector after rotating the second sub-flue around the central axis of the horizontal flange face by 6 bolt holes.

[0030] Figure 8 This is a structural schematic diagram of the horizontal flange face according to a specific embodiment, which shows the angular relationship of the seven bolt hole positions of the second sub-flue rotating around the central axis of the horizontal flange face;

[0031] Figure 9 A schematic diagram showing the relative positions of the horizontal flange face, the outlet of the second sub-flue, and the cyclone dust collector after rotating the second sub-flue around the central axis of the horizontal flange face by 7 bolt holes.

[0032] Figure 10 for Figure 2 The supplementary diagrams additionally show the exterior walls and partitions of the converter workshop;

[0033] Figure 11 for Figure 4 The supplementary diagram shows the exterior walls and partitions of the converter workshop.

[0034] Explanation of reference numerals in the attached figures

[0035] 11: Evaporative cooler; 12: Raw coal gas pipeline;

[0036] 21: First sub-flue; 22: Second sub-flue; 23: Horizontal flange face;

[0037] 3: First connecting flue;

[0038] 31: First explosion relief valve; 32: Fire sprinkler system;

[0039] 4: Cyclone dust collector;

[0040] 5: Second connecting flue;

[0041] 51: Second explosion relief valve; 52: First-stage fire-tube evaporator; 53: Second-stage fire-tube evaporator;

[0042] 6: Conditioning and dust collector;

[0043] 7: Banana-shaped ash discharge mechanism;

[0044] 71: partition;

[0045] 81: Exterior wall; 82: Partition wall. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0047] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order or hierarchy.

[0048] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments.

[0049] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "attachment," and "attachment" should be interpreted broadly. For example, they can refer to direct connection or indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0050] In this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0051] In the embodiments of this utility model, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this utility model shown in the drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this utility model.

[0052] In this utility model, "multiple" refers to two or more, including two.

[0053] This utility model relates to directions such as "up", "down", "left", "right", "front", and "back", with Figure 1 The orientation is used as a reference.

[0054] like Figure 1 and Figure 2As shown, a traditional dry dust removal system includes a vaporization flue, an evaporative cooler, a banana-bend ash discharge mechanism 7, and a raw coal gas pipeline 12. The inlet of the vaporization flue is located above the converter, and the outlet of the vaporization flue is connected to the top inlet of the evaporative cooler 11. The bottom outlet of the evaporative cooler 11 is connected to the inlet of the banana-bend ash discharge mechanism 7, and the outlet of the banana-bend ash discharge mechanism 7 is connected to the bottom inlet of the raw coal gas pipeline 12. The vaporization flue, along the coal gas flow direction, includes a first sub-flue 21 and a second sub-flue 22. The second sub-flue 22 has a downward-opening U-shaped structure. The connection surface between the outlet of the first sub-flue 21 and the inlet of the second sub-flue 22 is a horizontal flange surface 23. Both the evaporative cooler 11 and the raw coal gas pipeline 12 are arranged vertically, and the banana-bend ash discharge mechanism 7 includes a horizontal section in the middle.

[0055] A traditional wet dust removal system includes a vaporization flue, a Venturi spray device, a dehydrator, a wastewater treatment device, and a raw gas pipeline 12. The inlet of the vaporization flue is located above the converter, and its outlet is connected to the top gas inlet of the Venturi spray device. The bottom of the Venturi spray device has a gas outlet and a wastewater discharge port. The gas outlet of the Venturi spray device is connected to the inlet of the dehydrator, and the outlet of the dehydrator is connected to the inlet of the raw gas pipeline 12. The wastewater discharge port of the Venturi spray device is connected to the wastewater treatment device. The vaporization flue, along the gas flow direction, includes a first sub-flue 21 and a second sub-flue 22. The second sub-flue 22 has a downward-opening U-shaped structure. The connection surface between the outlet of the first sub-flue 21 and the inlet of the second sub-flue 22 is a horizontal flange surface 23. The Venturi spray device is installed vertically.

[0056] To upgrade the converter gas treatment system, such as Figures 3 to 5 As shown, this utility model provides an in-situ modified converter gas treatment system, including a vaporization flue, a first connecting flue 3, a cyclone dust collector 4, a second connecting flue 5, and a conditioning dust collector 6. The vaporization flue includes a first sub-flue 21 and a second sub-flue 22 sequentially along the gas flow direction. The second sub-flue 22 has a U-shaped structure with its opening facing downwards. The connecting surface between the outlet of the first sub-flue 21 and the inlet of the second sub-flue 22 is a horizontal flange surface 23. The cyclone dust collector 4 is located at the position of the evaporator cooler 11 of the original dry dust removal system or the position of the Venturi spray device of the original wet dust removal system. The gas inlet of the cyclone dust collector 4 is located on its side. The second sub-flue 22 can rotate around the central axis of the horizontal flange surface 23, causing the gas outlet of the second sub-flue 22 to shift from directly above the cyclone dust collector 4 to diagonally above it (e.g., above the cyclone dust collector 4). Figure 4As shown, the outlet of the second sub-flue 22, located diagonally above the cyclone dust collector 4, is connected to the gas inlet of the cyclone dust collector 4 via the first connecting flue 3. The top outlet of the cyclone dust collector 4 is connected to the top inlet of the conditioning dust collector 6 via the second connecting flue 5. At least one fire-tube evaporator is arranged along the gas flow direction on the second connecting flue 5, and the at least one fire-tube evaporator is located directly above the cyclone dust collector 4 and / or the conditioning dust collector 6.

[0057] The in-situ modified converter gas treatment system provided by this utility model cleverly achieves spatial reconstruction of the system by utilizing the rotatable horizontal flange central axis connecting the first sub-flue 21 and the second sub-flue 22 of the vaporization flue as a rotational pivot. Specifically, by rotating the second sub-flue 22, its outlet is shifted from directly above the cyclone dust collector 4 to a position diagonally above (i.e., to the side above) the cyclone dust collector 4, successfully avoiding the vertical space directly above the cyclone dust collector 4 and providing installation space for the fire-tube evaporator. At the same time, through the newly added first connecting flue 3, the outlet of the shifted second sub-flue 22 can be smoothly connected to the side inlet of the cyclone dust collector 4, solving the core problems of interface misalignment and spatial mismatch between the old and new equipment. The in-situ modified converter gas treatment system provided by this utility model makes full use of the original system's vaporization flue, requires minimal modification, and is conducive to the in-situ modification of the converter gas treatment system, thereby ultimately achieving the cascade recovery of waste heat from low-temperature gas in the converter and the recovery of usable dust. Low-temperature gas in converters refers to converter gas with a temperature between 200℃ and 1000℃.

[0058] Specifically, the horizontal flange face 23 is provided with a plurality of bolt holes evenly distributed along the circumference. The rotation of the second sub-flue 22 is achieved by rotating the inlet of the second sub-flue 22 around the central axis of the horizontal flange face 23 through a plurality of bolt hole positions.

[0059] As an example, the specific rotation operation of the second sub-flue 22 is as follows: The horizontal flange face 23 has 60 evenly distributed bolt holes. Keeping the first sub-flue 21 fixed, the steam-water external pipeline connecting the second sub-flue 22 to the boiler drum is temporarily disconnected. Then, the second sub-flue 22 is rotated around the central axis of the horizontal flange face 23 by several bolt hole positions. Specifically, when the distance between the center of the horizontal flange face 23 and the center of the outlet end face of the second sub-flue 22 is 7100mm, as... Figure 6 and Figure 7 As shown, rotating the second sub-flue 22 around the central axis of the horizontal flange face 23 by 6 bolt hole positions is equivalent to a rotation angle of 360° / 60×6=36°. At this point, the horizontal offset distance of the center of the outlet end face of the second sub-flue 22 relative to its original position is 7100×2×sin(36° / 2)≈4388mm. Figure 8 and Figure 9As shown, the second sub-flue 22 is rotated around the central axis of the horizontal flange surface 23 by 7 bolt hole positions, which is equivalent to a rotation angle of 42°. At this time, the horizontal offset distance of the center of the outlet end face of the second sub-flue 22 relative to the original position is 7100×2×sin(42° / 2)≈5089mm.

[0060] This rotation process causes the outlet of the second sub-flue 22 to translate along an isosceles triangle trajectory with the rotation center as the vertex and a leg length of 7100mm, eventually stabilizing at the target position above and to the side of the cyclone dust collector 4. After the rotation and displacement are completed, the second sub-flue 22, subsequent components, and the steam-water external pipeline connected to the boiler drum are adaptively modified and reconnected according to the new spatial position, ensuring that the pipeline system is well-sealed and has a reasonable route. The subsequent components include the first connecting flue 3, the cyclone dust collector 4, the fire-tube evaporator, and the second connecting flue 5.

[0061] Through the aforementioned rotational modification scheme, this invention achieves precise spatial displacement of the original gas outlet position of the vaporization flue without altering the main structure of the vaporization flue, simply by adjusting the flange connection angle. This design fully utilizes the adjustability potential of the original equipment structure, eliminating the need for large-scale disassembly or damage to the original foundation during the modification process, thus greatly simplifying the construction procedure.

[0062] Preferably, after the second sub-flue 22 rotates around the central axis of the horizontal flange surface 23, the horizontal distance between the gas outlet center of the second sub-flue 22 and the gas inlet of the cyclone dust collector 4 is greater than the radius of the second sub-flue 22. This satisfies the connection space requirement between the outlet of the second sub-flue 22 and the lateral inlet of the cyclone dust collector 4, while also providing sufficient vertical space for the installation of the fire-tube evaporator. Furthermore, after the second sub-flue 22 rotates around the central axis of the horizontal flange surface 23, the horizontal distance between the gas outlet center of the second sub-flue 22 and the gas inlet of the cyclone dust collector 4 is 1.1-1.8 times the radius of the second sub-flue 22. This further facilitates the connection of the first connecting flue 3 between the outlet of the second sub-flue 22 and the lateral inlet of the cyclone dust collector 4.

[0063] In the actual layout of the converter workshop, such as Figure 10 As shown, a gas dust removal system typically has two walls on its front and rear sides: one is an exterior wall 81, used to separate the outdoor environment from the converter workshop; this wall is designed to be demolished and expanded. The other is a partition wall 82, serving as a separation structure from adjacent workshops, and cannot be demolished or expanded. Based on this spatial constraint, as... Figure 11As shown, this utility model specifically limits the rotation direction of the second sub-flue 22 to the direction of rotation towards the outer wall 81 of the converter workshop. By rotating the second sub-flue 22 towards the removable outer wall 81, the expandability of the outer wall 81 side is effectively utilized, providing the necessary space margin for the translation of the flue outlet, while completely avoiding structural interference with the non-removable partition wall 82. In specific implementation, the optimal rotation angle of the second sub-flue 22 can be determined according to the actual removable range of the outer wall 81, such as rotating the second sub-flue 22 around the central axis of the horizontal flange surface 23 by 6 or 7 bolt hole positions, thereby achieving optimal space utilization. Of course, the above description of the actual layout of the converter workshop is only an example and does not limit the scope of protection of this utility model. It is conceivable that if the space in the converter workshop is sufficient, the rotation direction of the second sub-flue 22 can be either towards the outer wall 81 of the converter workshop or towards the partition wall 82 of the converter workshop.

[0064] Preferably, a first explosion relief valve 31 is installed at the highest point of the second sub-flue 22, and a fire-extinguishing sprinkler system 32 for extinguishing sparks within the pipe section is installed on the second sub-flue 22. This forms a dual protection mechanism: the sparks within the pipe section are quickly extinguished by water spraying, effectively preventing CO combustion and explosion accidents; even if a CO combustion and explosion occurs, the first explosion relief valve 31 can open instantly to release pressure, and can automatically reset immediately after the explosion, ensuring the continuous safe operation of the system.

[0065] Furthermore, the second connecting flue 5 has a U-shaped structure with its opening facing downwards, and a second explosion relief valve 51 is installed at the highest point of the second connecting flue 5. This further ensures the safe and continuous operation of the gas treatment system.

[0066] Preferably, there are two fire-tube evaporators, namely a primary fire-tube evaporator 52 and a secondary fire-tube evaporator 53. The primary fire-tube evaporator 52 is located directly above the cyclone dust collector 4 in the vertical direction, and the secondary fire-tube evaporator 53 is located directly above the conditioning dust collector 6 in the vertical direction.

[0067] The working principle of the converter gas treatment system proposed in this utility model is as follows: The gas discharged from the vaporization flue first enters the cyclone dust collector 4, where it undergoes preliminary cooling and dust removal, effectively removing more than 50% of large particulate dust from the gas and further eliminating high-energy sparks. After being processed by the cyclone dust collector 4, the gas is discharged upward from its upper central pipe, and then sequentially enters the first-stage fire-tube evaporator 52, the second connecting flue 5, and the second-stage fire-tube evaporator 53, forming a tiered heat exchange system. During this process, the gas temperature gradually decreases from about 1000℃ to about 250℃, achieving efficient recovery of sensible heat and usable dust from the gas. Subsequently, the gas at about 250℃ enters the conditioning dust collector 6, where a spray device at its upper part sprays an appropriate amount of water mist into the gas for conditioning treatment, further reducing the gas temperature to about 120℃. During the conditioning process, residual large dust particles that were not removed by the cyclone dust collector 4, as well as some small dust particles, agglomerate and increase in size due to water mist spraying, and are eventually discharged from the bottom of the conditioning dust collector 6. The treated clean gas leaves from the bottom of the conditioning dust collector 6 and enters the subsequent electrostatic precipitator for further purification.

[0068] For the in-situ modification of the dry dust removal system, preferably, the cyclone dust collector 4 is installed at the location of the evaporator cooler 11 of the original dry dust removal system, and the conditioning dust collector 6 is installed at the location of the raw coal gas pipeline 12 of the original dry dust removal system. The bottom ash outlets of both are connected to the banana-bend ash discharge mechanism 7 of the original dry dust removal system. To adapt to the dual ash source output requirements after the modification, the banana-bend ash discharge mechanism 7 has been specifically improved: an openable baffle 71 is installed in its horizontal section. The baffle 71 is hinged to the inner wall of the horizontal channel by a rotating shaft, which can flexibly switch between the vertical closed state and the open state.

[0069] The working mechanism of the banana-shaped ash discharge mechanism 7 is as follows: When the partition 71 is in the vertically closed state, it divides the horizontal channel into a first ash storage area and a second ash storage area that are not interconnected. The first ash storage area is connected to the bottom ash outlet of the cyclone dust collector 4 and is used to collect large particles of dust removed by the cyclone dust collector; the second ash storage area is connected to the bottom ash outlet of the conditioning dust collector 6 and is used to collect dust agglomerated by water spray during the conditioning process. When the partition 71 is rotated open, the first and second ash storage areas are interconnected, forming a unified ash discharge channel.

[0070] This design cleverly utilizes the intermittent nature of converter operation: during converter blowing, the gas flows continuously, and the baffle 71 remains vertically closed, effectively preventing gas leakage between the cyclone dust collector 4 and the conditioning dust collector 6, ensuring the stability of the dust removal process; during the non-blowing period of the converter, the gas flow is minimal or only air, at which point the baffle 71 rotates open, connecting the two ash storage areas, and the dust is centrally discharged through a unified ash conveying device. This realizes the utilization of the single ash discharge device of the banana-bend ash discharge mechanism 7 in the original dry dust removal system, eliminating the need to equip the first and second ash storage areas with separate ash discharge devices. It fully utilizes the banana-bend structure of the original dry dust removal system, reduces modification costs, and solves the leakage problem when there are dual ash sources through the simple setting of the baffle 71.

[0071] The drive method of the partition 71 can be flexibly selected according to actual needs, including manual, pneumatic or electric methods.

[0072] It should be noted that the opening and closing movement of the partition 71 can also be achieved through a sliding mechanism. This involves installing a guide rail system within the horizontal channel of the banana-shaped ash discharge mechanism 7, allowing the partition 71 to slide horizontally along the guide rails. A push rod drives the partition 71 to move between the closed and open positions. Another feasible solution is a lifting mechanism, which vertically lifts the partition 71 to achieve channel connection and isolation. These alternative implementations can effectively achieve functional switching of the partition 71 under different working states. Users can choose the most suitable solution based on specific space constraints, maintenance needs, and technical conditions.

[0073] Regarding the configuration of the ash discharge mechanism, although utilizing the existing banana-bend ash discharge mechanism 7 and modifying it with partition 71 is the preferred solution of this utility model, this utility model also covers other feasible ash discharge configuration methods. In particular, when the existing ash discharge mechanism cannot be reused, ash discharge devices can be configured independently for the first ash storage area and the second ash storage area.

[0074] For the in-situ modification of the wet dust collection system, the original wet treatment equipment, including the Venturi spray device, dewatering device, and wastewater treatment device, needs to be removed. The following modifications are then made to the original location: Cyclone dust collector 4 is installed in the original Venturi spray device location, making full use of the existing equipment foundation; Conditioning dust collector 6 is installed in the space occupied by the original dewatering device and part of the raw gas pipeline 12; Since the original wet system lacked a corresponding dry ash discharge structure, a new banana-bend ash discharge mechanism 7 needs to be installed, horizontally positioned below the cyclone dust collector 4 and conditioning dust collector 6. The newly installed banana-bend ash discharge mechanism 7 adopts a similar design concept to the dry system modification, which will not be elaborated here.

[0075] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An in-situ modified converter gas treatment system, characterized in that, It includes a vaporization flue, a first connecting flue (3), a cyclone dust collector (4), a second connecting flue (5), and a conditioning dust collector (6); the vaporization flue includes a first sub-flue (21) and a second sub-flue (22) along the gas flow direction, the second sub-flue (22) is a U-shaped opening facing downwards, and the connection surface between the outlet of the first sub-flue (21) and the inlet of the second sub-flue (22) is a horizontal flange surface (23). The cyclone dust collector (4) is located at the position of the evaporator cooler (11) of the original dry dust removal system or the position of the Venturi spray device of the original wet dust removal system; the gas outlet of the second sub-flue (22) after rotating around the central axis of the horizontal flange (23) is located obliquely above the cyclone dust collector (4) and is connected to the gas inlet of the cyclone dust collector (4) through the first connecting flue (3); the gas outlet at the top of the cyclone dust collector (4) is connected to the gas inlet at the top of the conditioning dust collector (6) through the second connecting flue (5), and at least one fire tube evaporator is arranged along the gas flow direction on the second connecting flue (5), and at least one fire tube evaporator is located directly above the cyclone dust collector (4) and / or the conditioning dust collector (6).

2. The in-situ modified converter gas treatment system according to claim 1, characterized in that, The horizontal flange face (23) is provided with a number of bolt holes evenly distributed along the circumference. The rotation of the second sub-flue (22) is achieved by rotating the second sub-flue (22) around the central axis of the horizontal flange face (23) through several bolt hole positions.

3. The in-situ modified converter gas treatment system according to claim 1, characterized in that, The horizontal distance between the gas outlet center of the second sub-flue (22) after rotating around the central axis of the horizontal flange (23) and the gas inlet of the cyclone dust collector (4) is greater than the radius of the second sub-flue (22).

4. The in-situ modified converter gas treatment system according to claim 3, characterized in that, The horizontal distance between the gas outlet center of the second sub-flue (22) after rotating around the central axis of the horizontal flange (23) and the gas inlet of the cyclone dust collector (4) is 1.1-1.8 times the radius of the second sub-flue (22).

5. The in-situ modified converter gas treatment system according to claim 1, characterized in that, The second sub-flue (22) rotates in the direction of the outer wall (81) of the converter workshop; wherein the outer wall (81) of the converter workshop is a wall used to separate the outdoor environment from the converter workshop.

6. The in-situ modified converter gas treatment system according to claim 1, characterized in that, The highest point of the second sub-flue (22) is equipped with a first explosion relief valve (31), and the second sub-flue (22) is equipped with a fire extinguishing sprinkler system (32) for extinguishing sparks in the pipe section.

7. The in-situ modified converter gas treatment system according to claim 1, characterized in that, The cyclone dust collector (4) is located at the evaporator cooler (11) of the original dry dust removal system, and the conditioning dust collector (6) is located at the raw coal gas pipeline (12) of the original dry dust removal system. The bottom ash outlet of the cyclone dust collector (4) and the bottom ash outlet of the conditioning dust collector (6) are both connected to the ash discharge device.

8. The in-situ modified converter gas treatment system according to claim 7, characterized in that, The ash removal device is the banana-bend ash removal mechanism (7) used in the original dry dust removal system to connect the evaporative cooler (11) and the raw coal gas pipeline (12). The horizontal channel of the banana-bend ash removal mechanism (7) is equipped with an openable partition (71). When the partition (71) is closed, the horizontal channel is divided into a first ash storage area and a second ash storage area that are not connected to each other. The first ash storage area is connected to the bottom ash outlet of the cyclone dust collector (4), and the second ash storage area is connected to the bottom ash outlet of the conditioning dust collector (6). When the partition (71) is opened, the first ash storage area and the second ash storage area are connected.

9. The in-situ modified converter gas treatment system according to claim 8, characterized in that, The partition (71) is hinged to the inner wall of the horizontal channel via a rotating shaft. By rotating the partition (71), the vertical closed state and the open state of the partition (71) can be switched.

10. The in-situ modified converter gas treatment system according to claim 1, characterized in that, The cyclone dust collector (4) is located at the position of the Venturi spray device of the original wet dust removal system, and the conditioning dust collector (6) is located at the position of the dewatering device of the original wet dust removal system. The bottom ash outlet of the cyclone dust collector (4) and the bottom ash outlet of the conditioning dust collector (6) are both connected to the ash outlet device.

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