A method for adding a primary flue gas system equipment in an existing plant structure

Abstract

This invention relates to a method for adding a primary flue gas system to an existing plant structure, comprising the following steps: S1: Setting up vertical hoisting channels; S1.1: Setting up a first vertical hoisting channel and a second vertical hoisting channel; S1.2: Setting up a third vertical hoisting channel; S2: Setting up hoisting mechanisms; S3: Installing and positioning the fixed flue; S4: Installing and positioning the middle flue; S5: Installing and positioning the second tail flue; S6: Temporarily storing the equipment; S7: Installing and positioning the first tail flue; S8: Installing and positioning the spray tower; S9: Installing and positioning the absorption tower; S10: Restoring the first hoisting hole on the first platform and the fourth hoisting hole on the second platform, and dismantling the first hoisting mechanism and the second hoisting mechanism. This invention enables the installation of the primary flue gas system equipment within the confined space formed by multi-layered platforms in a plant structure, without affecting the normal production of adjacent converters, with minimal impact on the stability of the plant structure, and without affecting the normal operation of existing facilities within the plant structure.

Description

Technical Field

[0001] This invention belongs to the field of mechanical equipment installation technology, and in particular relates to a method for adding a primary flue gas system to an existing factory structure. Background Technology

[0002] The primary flue gas system equipment for metallurgical converters is mainly used to recover the waste heat energy of the high-temperature flue gas generated during converter smelting and to purify the flue gas into reusable converter gas. In newly constructed converter steelmaking projects, the primary flue gas system equipment is installed simultaneously during the plant structure installation. Expanding steelmaking capacity requires adding converters, and after adding converters, corresponding primary flue gas system equipment needs to be installed in the existing plant structure, such as... Figure 1-2 As shown, the plant structure, from bottom to top, includes a furnace front platform, a first platform, an absorption tower installation platform, a spray tower installation platform, a second platform, and a furnace top platform. The primary flue gas system equipment includes waste heat recovery equipment (first tail flue, second tail flue, middle flue, and fixed flue) and flue gas purification equipment (absorption tower and spray tower). During construction, the primary flue gas system equipment needs to be installed in areas A and B of the plant structure, which are bounded by a certain column line. The fixed flue, middle flue, second tail flue, first tail flue, and spray tower are interconnected and located in area A, while the absorption tower is located in area B.

[0003] When adding a primary flue gas system to an existing plant structure, the installation is difficult due to the impact of the normal production of the adjacent converter and the need to install the equipment in the narrow space formed by the multi-layer structural platform in the plant structure. Moreover, the primary flue gas system equipment is mostly large-diameter cylindrical and tower-type equipment. Therefore, optimizing the installation process has become an urgent construction problem to be solved. Summary of the Invention

[0004] The main objective of this invention is to propose a method for adding a primary flue gas system to an existing factory structure, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A method for adding a primary flue gas system to an existing factory structure includes the following steps:

[0007] S1: Vertical hoisting channel setup

[0008] S1.1: Setting up the first and second vertical hoisting channels: Based on the vertical projected area of ​​the first tail flue, the second tail flue, and the spray tower, four rectangular hoisting holes are sequentially opened on the first platform, the absorption tower installation platform, the spray tower installation platform, and the second platform in area A: the first hoisting hole, the second hoisting hole, the third hoisting hole, and the fourth hoisting hole. The space formed by the four rectangular hoisting holes is divided into two parts, left and right, which are the first vertical hoisting channel and the second vertical hoisting channel, respectively.

[0009] S1.2: The third vertical hoisting channel is set up as follows: the reserved holes of the spray tower installation platform and the absorption tower on the second platform in Zone B are used as the third vertical hoisting channel.

[0010] S2: Lifting mechanism setup: A first lifting mechanism and a second lifting mechanism are set on the furnace top platform in area A. The first lifting mechanism is located on the first vertical lifting channel and coincides with the center of the second tail flue. The second lifting mechanism is located on the second vertical lifting channel and coincides with the center of the first tail flue and the spray tower.

[0011] S3: Fixed flue installation and positioning: The fixed flue is hoisted to the bottom of the first platform by a truck crane from the A-zone feeding span, and a chain hoist is set on the absorption tower installation platform to install it in place;

[0012] S4: Installation and positioning of the middle flue: The middle flue is transported from the steel span of area A to below the first hoisting hole. The first hoisting mechanism lifts the middle flue. When its head reaches the second platform and its bottom exceeds the absorption tower installation platform, a chain hoist is used to horizontally pull it so that its bottom is fixedly connected to the fixed flue, and its top is temporarily fixed to the second platform.

[0013] S5: Installation and positioning of the second tail flue: The second tail flue is transported from the steel span of area A to below the first hoisting hole. The second hoisting mechanism lifts the second tail flue. When it exceeds the second platform, the second tail flue is transferred to the first hoisting mechanism and fixedly connected to the middle flue.

[0014] S6: Temporary storage of equipment: The lower section of the absorption tower, the upper section of the absorption tower, the lower section of the spray tower, and the upper section of the spray tower are transported from the steel span in area A to the bottom of the first hoisting hole, and then hoisted to the absorption tower installation platform in area B by the second hoisting mechanism.

[0015] S7: First tail flue installation: The first tail flue is transported from the steel span of area A to below the first lifting hole. The second lifting mechanism lifts the first tail flue to the installation position and then fixes it to the second tail flue.

[0016] S8: Spray Tower Installation and Positioning: Restore the second hoisting hole on the absorption tower installation platform, transport the upper section of the spray tower to the second vertical hoisting channel, and use the second hoisting mechanism to hoist and temporarily fix the upper section of the spray tower through the inspection hole of the first tail flue on the second platform. Then transport the lower section of the spray tower to the second vertical hoisting channel, use the second hoisting mechanism to hoist and fix the lower section of the spray tower through the upper section of the spray tower, and restore the third hoisting hole on the spray tower installation platform. Then position and install the lower section of the spray tower on the spray tower installation platform. Finally, connect and fix the upper section of the spray tower to the lower section of the spray tower. The first tail flue is connected to the upper section of the spray tower through a flexible connection device.

[0017] S9: Absorber tower installation and positioning: Move the second hoisting mechanism along the furnace top platform to the center of the third vertical hoisting channel. The second hoisting mechanism lifts up the upper section of the absorber tower and temporarily fixes it on the spray tower installation platform. Then, the second hoisting mechanism passes through the upper section of the absorber tower and lifts up the lower section of the absorber tower, placing it in the installation position on the absorber tower installation platform. Finally, connect and fix the upper section of the absorber tower to the lower section of the absorber tower.

[0018] S10: Restore the first lifting hole on the first platform and the fourth lifting hole on the second platform, dismantle the first lifting mechanism and the second lifting mechanism, and the installation of the primary flue gas system equipment is completed.

[0019] Preferably, the opening of the hoisting hole can be simulated by computer first, and then the line is drawn and the hole is opened on the first platform, absorption tower installation platform, spray tower installation platform and second platform in area A.

[0020] Preferably, the shorter side of the four rectangular hoisting holes is at least greater than the diameter of the spray tower, and the longer side is at least greater than the furthest distance between the spray tower and the edge of the second tail flue.

[0021] Preferably, the first and second hoisting mechanisms consist of pulley blocks and winches.

[0022] Preferably, the longer side of the first hoisting hole on the first platform is greater than the length of the middle flue.

[0023] Preferably, a temporary auxiliary hoisting facility is provided on the first platform to transport the first tail flue, the second tail flue, the middle flue, the absorption tower and the spray tower to below the first hoisting hole.

[0024] Preferably, when storing the equipment, the upper section of the absorption tower and the upper section of the spray tower are placed on the side close to the feeding span, and the upper section of the spray tower and the lower section of the spray tower are located on the same axis as the second hoisting hole.

[0025] This invention provides a method for adding a primary flue gas system to an existing factory structure, which has the following beneficial effects;

[0026] 1. The present invention enables the installation of primary flue gas system equipment within a narrow space formed by a multi-layered structural platform in a factory building structure.

[0027] 2. The fixed flue of the present invention is lifted by a truck crane, while the first tail flue, the second tail flue, the middle flue, the absorption tower and the spray tower are lifted by the first lifting mechanism and the second lifting mechanism. There is no need to use the overhead crane in the plant structure, and it will not affect the normal production of the adjacent converter.

[0028] 3. By optimizing the path of the four platform openings (first, second, third, and fourth lifting holes), this invention has minimal impact on the stability of the factory structure and will not affect the normal operation of existing facilities within the factory structure. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the primary flue gas system equipment of the present invention within the plant structure;

[0030] Figure 2 This is a schematic diagram of the structure of the primary flue gas system equipment of the present invention;

[0031] Figure 3 This is a schematic diagram showing the location and structure of the third hoisting hole in this invention;

[0032] Figure 4 This is a schematic diagram showing the location of the first lifting hole in this invention;

[0033] Figure 5 This is a schematic diagram showing the position and structure of the second and third lifting holes of the present invention;

[0034] Figure 6 This is a schematic diagram showing the positional structure of the first and second lifting mechanisms of the present invention;

[0035] Figure 7 This is a schematic diagram of the temporary auxiliary hoisting facility of the present invention;

[0036] Figure 8 This is a schematic diagram of the installation structure of the fixed flue and the intermediate flue of the present invention;

[0037] Figure 9 This is a schematic diagram of the installation structure of the second tail flue of the present invention;

[0038] Figure 10 This is a schematic diagram of the structure where the device of the present invention is stored;

[0039] Figure 11 This is a schematic diagram of the installation structure of the first tail flue and spray tower of the present invention;

[0040] Figure 12This is a schematic diagram of the installation structure of the absorption tower of the present invention. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0042] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] An embodiment of a method for adding a primary flue gas system to an existing factory structure includes the following steps:

[0046] S1: Vertical hoisting channel setup

[0047] S1.1: Setting up the first vertical hoisting channel D1 and the second vertical hoisting channel D2: Refer to... Figure 1 , Figure 3 , Figure 4 and Figure 5Based on the vertical projected areas of the first tail flue 4.1, the second tail flue 4.2, and the spray tower 3.2, four rectangular lifting holes are sequentially opened on the first platform 200, the absorption tower installation platform 300, the spray tower installation platform 400, and the second platform 500 in area A: the first lifting hole 5.1, the second lifting hole 5.2, the third lifting hole 5.3, and the fourth lifting hole 5.4. The space formed by the four rectangular lifting holes is divided into two parts, left and right, which are the first vertical lifting channel D1 and the second vertical lifting channel D2, respectively.

[0048] The opening of the hoisting holes can be simulated by computer first, and then the lines can be drawn and the holes can be opened on the first platform 200, the absorption tower installation platform 300, the spray tower installation platform 400, and the second platform 500 in area A.

[0049] Reference Figure 1 and Figure 2 The fixed flue 4.4, the middle flue 4.3, the second tail flue 4.2, and the first tail flue 4.1 have the same diameter. The spray tower 3.2 typically has the same diameter as the absorption tower 3.1, but is slightly larger than the diameters of the fixed flue 4.4, the middle flue 4.3, the second tail flue 4.2, and the first tail flue 4.1. Therefore, the short side of the four rectangular hoisting holes must be at least greater than the diameter of the spray tower 3.2, and the long side must be at least greater than the furthest distance between the edges of the spray tower 3.2 and the second tail flue 4.2. This ensures that the first vertical hoisting channel D1 can vertically hoist the middle flue 4.3 and the second tail flue 4.2, and the second vertical hoisting channel D2 can vertically hoist the first tail flue 4.1, the spray tower 3.2, and the absorption tower 3.1.

[0050] S1.2: Setting of the third vertical hoisting channel D3: Refer to Figure 1 The reserved holes of the absorption tower on the spray tower installation platform 400 and the second platform 500 in area B are used as the third vertical hoisting channel D3.

[0051] During the construction of a new converter steelmaking project, corresponding reserved holes are usually set for waste heat recovery equipment and flue gas purification equipment during the installation of the plant structure. In this invention, the third hoisting hole 5.3 located on the spray tower installation platform 400 is connected to the reserved hole of the central flue on the same platform, so that the central flue 4.3 can be directly tilted into the reserved hole after vertical hoisting, while the other reserved holes in area A are covered by the corresponding hoisting holes. If, under special circumstances, the plant structure does not have corresponding reserved holes, the positions of the third vertical hoisting channel D3 and the reserved hole of the central flue 4.3 also need to be marked and opened.

[0052] S2: Lifting Mechanism Setup: Refer to Figure 6A first hoisting mechanism 2.1 and a second hoisting mechanism 2.2 are installed on the furnace top platform 600 in area A. The first hoisting mechanism 2.1 is located on the first vertical hoisting channel D1 and coincides with the center of the second tail flue 4.2. The second hoisting mechanism 2.2 is located on the second vertical hoisting channel D2 and coincides with the center of the first tail flue 4.1 and the spray tower 3.2.

[0053] The first hoisting mechanism 2.1 and the second hoisting mechanism 2.2 consist of pulley blocks and winches. With the center overlapping, the second tail flue 4.2, the first tail flue 4.1 and the spray tower 3.2 can be installed in place simply by using the first hoisting mechanism 2.1 and the second hoisting mechanism 2.2 to vertically hoist them to the elevation position, without the need for horizontal adjustment.

[0054] S3: Fixed flue 4.4 installation and positioning: Refer to Figure 8 The fixed flue 4.4 is hoisted from the feeding span 8 in area A to below the first platform 200 by a truck crane, and a chain hoist is set on the absorption tower installation platform 300 to install it in place;

[0055] S4: Installation and positioning of the central flue 4.3: Refer to... Figure 8 The middle flue 4.3 is transported from the steel span 7 of area A to below the first hoisting hole 5.1. The first hoisting mechanism 2.1 lifts the middle flue 4.3. When its head reaches the second platform 500 and its bottom exceeds the absorption tower installation platform 300, a chain hoist is used to horizontally pull it so that its bottom is fixedly connected to the fixed flue 4.4, and its top is temporarily fixed on the second platform 500.

[0056] Before hoisting, the waste heat recovery equipment (first tail flue 4.1, second tail flue 4.2 and middle flue 4.3) and the flue gas purification equipment (absorption tower 3.1 and spray tower 3.2) need to be placed horizontally on the furnace front platform 100. They will only change from a horizontal to a vertical state during hoisting. However, since the middle flue 4.3 is relatively long, in order to hoist it smoothly, the long side of the first hoisting hole 5.1 on the first platform 200 needs to be greater than the length of the middle flue 4.3.

[0057] Reference Figure 7 Temporary auxiliary hoisting facilities are provided on the first platform 200. In this embodiment, the temporary auxiliary hoisting facilities specifically include a chain hoist for hoisting and transfer, and a horizontal traction winch for moving the equipment. The temporary auxiliary hoisting facilities can transport the first tail flue 4.1, the second tail flue 4.2, the middle flue 4.3, the absorption tower 3.1, and the spray tower 3.2 to below the first hoisting hole 5.1 for easy hoisting.

[0058] S5: Second tail flue 4.2 installation in place: Refer to Figure 9The second tail flue 4.2 is transported from the steel span 7 of area A to below the first hoisting hole 5.1. The second hoisting mechanism 2.2 lifts the second tail flue 4.2. When it exceeds the second platform 500, the second tail flue 4.2 is transferred to the first hoisting mechanism 2.1 and fixedly connected to the middle flue 4.3.

[0059] S6: Temporary storage of equipment: Refer to Figure 10 The lower section 3.1.2, the upper section 3.1.1, the lower section 3.2.2, and the upper section 3.2.1 of the spray tower are transported from the steel span 7 in area A to below the first hoisting hole 5.1, and then hoisted to the absorption tower installation platform 300 in area B by the second hoisting mechanism 2.2.

[0060] All equipment sections are placed horizontally and stored stably in Zone B. The upper section 3.1.1 of the absorption tower and the upper section 3.2.1 of the spray tower are placed near the feeding span 8. The upper section 3.2.1 of the spray tower and the lower section 3.2.2 of the spray tower are on the same axis as the second hoisting hole 5.2.

[0061] S7: First tail flue 4.1 installation in place: Refer to Figure 11 The first tail flue 4.1 is transported from the steel span 7 of area A to below the first hoisting hole 5.1. The second hoisting mechanism 2.2 then lifts the first tail flue 4.1 to the installation position and fixes it to the second tail flue 4.2.

[0062] S8: Spray tower 3.2 installation and positioning: Refer to Figure 11 , Figure 12 Then, restore the second hoisting hole 5.2 on the absorption tower installation platform 300, transport the upper section 3.2.1 of the spray tower to the second vertical hoisting channel D2, and the second hoisting mechanism 2.2 passes through the inspection hole 10 of the first tail flue 4.1 to hoist and temporarily fix the upper section 3.2.1 of the spray tower onto the second platform 500. Next, transport the lower section 3.2.2 of the spray tower to the second vertical hoisting channel D2, and the second hoisting mechanism 2.2 passes through the inspection hole 10 of the first tail flue 4.1 to hoist and temporarily fix the upper section 3.2.1 of the spray tower onto the second platform 500. The upper section 3.2.1 of the spray tower is lifted and the lower section 3.2.2 of the spray tower is raised and the third lifting hole 5.3 on the spray tower installation platform 400 is restored. Then, the lower section 3.2.2 of the spray tower is positioned and installed on the spray tower installation platform 400. Finally, the upper section 3.2.1 of the spray tower and the lower section 3.2.2 of the spray tower are connected and fixed. The first tail flue 4.1 is connected to the upper section 3.2.1 of the spray tower through a flexible connection device.

[0063] S9: Absorber Tower 3.1 Installation and Positioning: Refer to Figure 12The second hoisting mechanism 2.2 is moved along the furnace top platform 600 to the center of the third vertical hoisting channel D3. The second hoisting mechanism 2.2 lifts up the upper section 3.1.1 of the absorption tower and temporarily fixes it on the spray tower installation platform 400. Then, the second hoisting mechanism 2.2 passes through the upper section 3.1.1 of the absorption tower and lifts up the lower section 3.1.2 of the absorption tower and places it on the installation position of the absorption tower installation platform 300. Then, the upper section 3.1.1 of the absorption tower and the lower section 3.1.2 of the absorption tower are connected and fixed.

[0064] S10: Restore the first lifting hole 5.1 on the first platform 200 and the fourth lifting hole 5.4 on the second platform 500, remove the first lifting mechanism 2.1 and the second lifting mechanism 2.2, and the installation of the primary flue gas system equipment is completed.

[0065] This invention provides a method for adding primary flue gas system equipment to an existing plant structure. The primary flue gas system equipment can be installed within the confined space formed by the multi-layered structural platforms within the plant structure. The fixed flue 4.4 is lifted using a truck crane, while the first tail flue 4.1, second tail flue 4.2, middle flue 4.3, absorption tower 3.1, and spray tower 3.2 are lifted using the first lifting mechanism 2.1 and the second lifting mechanism 2.2. This eliminates the need for overhead cranes within the plant structure and avoids impacting the normal production of adjacent converters. The invention optimizes the path by setting four platform openings: the first lifting hole 5.1, the second lifting hole 5.2, the third lifting hole 5.3, and the fourth lifting hole 5.4. This minimizes the impact on the stability of the plant structure and does not affect the normal operation of existing facilities within the plant structure. The invention employs a vertical lifting and inverted installation method and equipment translation, reducing construction difficulty and improving construction efficiency.

[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for adding a primary flue gas system to an existing factory structure, characterized in that, Includes the following steps: S1: Vertical hoisting channel setup S1.1: Setting up the first and second vertical hoisting channels: Based on the vertical projected area of ​​the first tail flue, the second tail flue, and the spray tower, four rectangular hoisting holes are sequentially opened on the first platform, the absorption tower installation platform, the spray tower installation platform, and the second platform in area A: the first hoisting hole, the second hoisting hole, the third hoisting hole, and the fourth hoisting hole. The space formed by the four rectangular hoisting holes is divided into two parts, left and right, which are the first vertical hoisting channel and the second vertical hoisting channel, respectively. S1.2: The third vertical hoisting channel is set up as follows: the reserved holes of the spray tower installation platform and the absorption tower on the second platform in Zone B are used as the third vertical hoisting channel. S2: Lifting mechanism setup: A first lifting mechanism and a second lifting mechanism are set on the furnace top platform in area A. The first lifting mechanism is located on the first vertical lifting channel and coincides with the center of the second tail flue. The second lifting mechanism is located on the second vertical lifting channel and coincides with the center of the first tail flue and the spray tower. S3: Fixed flue installation and positioning: The fixed flue is hoisted to the bottom of the first platform by a truck crane from the A-zone feeding span, and a chain hoist is set on the absorption tower installation platform to install it in place; S4: Installation and positioning of the middle flue: The middle flue is transported from the steel span of area A to below the first hoisting hole. The first hoisting mechanism lifts the middle flue. When its head reaches the second platform and its bottom exceeds the absorption tower installation platform, a chain hoist is used to horizontally pull it so that its bottom is fixedly connected to the fixed flue, and its top is temporarily fixed to the second platform. S5: Installation and positioning of the second tail flue: The second tail flue is transported from the steel span of area A to below the first hoisting hole. The second hoisting mechanism lifts the second tail flue. When it exceeds the second platform, the second tail flue is transferred to the first hoisting mechanism and fixedly connected to the middle flue. S6: Temporary storage of equipment: The lower section of the absorption tower, the upper section of the absorption tower, the lower section of the spray tower, and the upper section of the spray tower are transported from the steel span in area A to the bottom of the first hoisting hole, and then hoisted to the absorption tower installation platform in area B by the second hoisting mechanism. S7: First tail flue installation: The first tail flue is transported from the steel span of area A to below the first lifting hole. The second lifting mechanism lifts the first tail flue to the installation position and then fixes it to the second tail flue. S8: Spray Tower Installation and Positioning: Restore the second hoisting hole on the absorption tower installation platform, transport the upper section of the spray tower to the second vertical hoisting channel, and use the second hoisting mechanism to hoist and temporarily fix the upper section of the spray tower through the inspection hole of the first tail flue on the second platform. Then transport the lower section of the spray tower to the second vertical hoisting channel, use the second hoisting mechanism to hoist and fix the lower section of the spray tower through the upper section of the spray tower, and restore the third hoisting hole on the spray tower installation platform. Then position and install the lower section of the spray tower on the spray tower installation platform. Finally, connect and fix the upper section of the spray tower to the lower section of the spray tower. The first tail flue is connected to the upper section of the spray tower through a flexible connection device. S9: Absorber tower installation and positioning: Move the second hoisting mechanism along the furnace top platform to the center of the third vertical hoisting channel. The second hoisting mechanism lifts up the upper section of the absorber tower and temporarily fixes it on the spray tower installation platform. Then, the second hoisting mechanism passes through the upper section of the absorber tower and lifts up the lower section of the absorber tower, placing it in the installation position on the absorber tower installation platform. Finally, connect and fix the upper section of the absorber tower to the lower section of the absorber tower. S10: Restore the first lifting hole on the first platform and the fourth lifting hole on the second platform, dismantle the first lifting mechanism and the second lifting mechanism, and the installation of the primary flue gas system equipment is completed.

2. The method for adding a primary flue gas system to an existing factory structure according to claim 1, characterized in that: The opening of the hoisting holes was first simulated by computer, and then the lines were laid out and the holes were opened on the first platform, absorption tower installation platform, spray tower installation platform and second platform in area A.

3. The method for adding a primary flue gas system to an existing factory structure according to claim 1, characterized in that: The short side of the four rectangular hoisting holes must be at least greater than the diameter of the spray tower, and the long side must be at least greater than the furthest distance between the spray tower and the edge of the second tail flue.

4. The method for adding a primary flue gas system device to an existing factory structure according to claim 1, characterized in that: The first and second hoisting mechanisms consist of pulley blocks and winches.

5. A method for adding a primary flue gas system to an existing factory structure according to claim 1, characterized in that: The long side of the first hoisting hole on the first platform is greater than the length of the middle flue.

6. A method for adding a primary flue gas system to an existing factory structure according to claim 1, characterized in that: Temporary auxiliary hoisting facilities are set up on the first platform to transport the first tail flue, the second tail flue, the middle flue, the absorption tower and the spray tower to the area below the first hoisting hole.

7. A method for adding a primary flue gas system to an existing factory structure according to claim 1, characterized in that: When the equipment is stored on the absorption tower installation platform in Zone B, the upper section of the absorption tower and the upper section of the spray tower are placed on the side closer to the feeding span, and the upper section of the spray tower and the lower section of the spray tower are on the same axis as the second hoisting hole.

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