A modular installation method for a vertical annealing furnace

Abstract

The present invention discloses a modular installation method for a vertical annealing furnace. The method includes first designing the vertical annealing furnace in a modular manner, then setting the annealing furnace centerline and leveling points before installation, and then sequentially installing the furnace shells of the preheating section, heating section, slow cooling section, and rapid cooling section in a modular manner. The method includes first setting the longitudinal and transverse centerlines and leveling points at the bottom of the annealing furnace, and then setting permanent longitudinal and transverse auxiliary centerlines and leveling points on the top platform of the annealing furnace. The modular installation of the preheating section furnace shell, the heating section furnace shell, and the slow cooling section furnace shell each includes the installation of a lower furnace bottom chamber, multiple intermediate furnace chambers, and an upper furnace top chamber. The modular installation of the rapid cooling section furnace shell includes the installation of the rapid cooling section upper furnace shell, the furnace top chamber, and the rapid cooling section lower furnace shell. Modular installation improves work efficiency. By projecting the furnace bottom plane installation reference line onto the furnace top steel structure platform and adding auxiliary centerlines, the reliability and accuracy of furnace shell equipment calibration are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of installation of annealing furnace process equipment in a cold-rolled product production line, and particularly relates to a modular installation method of a vertical annealing furnace. Background Art

[0002] In the cold-rolled automotive sheet production line, the continuous annealing line, hot-dip galvanizing line, and galvanized high-strength steel line all utilize vertical annealing furnaces as the primary process section. These vertical annealing furnaces are primarily installed on a multi-layered process steel structure platform. The continuous annealing line consists of a preheating section (JPF), heating section (RTF), soaking section (SF), slow cooling section (SCS), rapid cooling section (RCS), over-aging section (OAS), final cooling section (FCS), and water quenching section (WQ). The furnace has a ceiling height of 31 meters and a length of 161 meters. The annealing furnaces for the hot-dip galvanizing and galvanized high-strength steel lines consist of a preheating section (PH), heating section (RTF), soaking section (SF), slow cooling section (SCS), rapid cooling section (RCS), and exit nose section (BS+SNOUT). The furnace has a ceiling height of 27.2 meters and a length of 60.5 meters. Vertical annealing furnaces are characterized by large furnace height and length, dense equipment pipelines, diverse structures and equipment configurations, multiple layers, and high installation precision requirements. Therefore, installation is difficult and time-consuming. Vertical annealing furnace installation is the key and most difficult part of the entire process line installation.

[0003] The traditional installation method for an annealing furnace is to install the furnace shell into the lower furnace bottom chamber, the middle furnace chamber, and the upper furnace top chamber, sequentially from bottom to top. The shell is then assembled and welded in sections and pieces. A scaffolding is then erected inside the furnace to weld the furnace anchors and install the refractory materials. Finally, furnace rollers, radiant tubes, and other furnace equipment are installed.

[0004] Traditional methods have long construction time and low efficiency and need further optimization. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a modular installation method for a vertical annealing furnace, which solves the problems of low efficiency and long construction time of traditional installation methods of annealing furnaces in the prior art.

[0006] The present invention adopts the following technical solutions to solve the above technical problems:

[0007] A modular installation method for a vertical annealing furnace includes: first, modular designing the vertical annealing furnace; then, setting the center line and leveling point of the annealing furnace before installation; and then modularly installing the furnace shells of the preheating section, heating section, slow cooling section, and fast cooling section in sequence, wherein:

[0008] When setting the center line and level point of the annealing furnace, first set the vertical and horizontal center lines and level points at the bottom of the annealing furnace. After the installation of the annealing furnace steel structure platform is completed, set permanent vertical and horizontal auxiliary center lines and level points on the top platform of the annealing furnace.

[0009] The modular installation of the preheating section furnace shell, heating section furnace shell, and slow cooling section furnace shell includes the installation of the lower furnace bottom chamber, multi-section intermediate furnace chambers, and upper furnace top chamber;

[0010] The modular installation of the rapid cooling section furnace shell includes the installation of the rapid cooling section ascending furnace shell, furnace top chamber, and rapid cooling section descending furnace shell.

[0011] The intermediate furnace chamber of the preheating section furnace shell consists of multiple sections. After the furnace bottom chamber is installed, the two semicircular furnace shells and nozzles of each section of the intermediate furnace chamber are first modularly assembled on the ground. Then, the two assembled semicircular furnace shells are hoisted to the target positions respectively, and after adjustment, they are assembled into a cylindrical furnace shell, and finally the nozzle is adjusted.

[0012] A stabilizing roller chamber is installed on the furnace shell of the middle furnace chamber in the preheating section, and the center of the stabilizing roller chamber is consistent with the center of the furnace bottom chamber and the furnace top chamber.

[0013] The elevation and level of the roller chamber can be adjusted by adding or removing the four support seat gaskets to stabilize the roller chamber.

[0014] The heating section furnace shell is installed from the middle of the heating furnace to both ends, or from one end to the other, according to the following steps:

[0015] Step 1: Install the furnace bottom chamber;

[0016] Step 2: Install the side panels and end wall panels of the middle furnace chamber in sequence;

[0017] Step 3: Install the furnace top chamber. After installation, adjust and calibrate the furnace shell. After calibration, use a temporary support frame to fix the furnace shell.

[0018] Step 4: Seal and weld the interfaces between the furnace walls and between the furnace walls and the furnace bottom and furnace top, then remove the temporary support frame and install the formal adjustable tie rod support frame;

[0019] Step 5: Carry out the construction of refractory materials in the furnace and install the equipment in the furnace.

[0020] The following methods are used to adjust and calibrate the furnace shell:

[0021] Hang a plumb line on the top of the furnace wall to check and adjust the verticality of the furnace wall; use the center of the furnace roller assembly hole on the furnace wall as a reference to check and adjust the center position and elevation of the furnace wall, and at the same time check and adjust the flatness of the furnace wall.

[0022] The furnace shell of the slow cooling section is connected to the cooling equipment, which includes a bellows, a circulating fan, a water / protective gas heat exchanger, and a circulating pipe. Spray holes are arranged on both sides of the bellows strip. When the furnace shell is installed, the outside of the joint is fully welded all around, and the elevation of the furnace shell is adjusted based on the center of the bellows inlet or outlet.

[0023] The upward furnace shell of the rapid cooling section adopts a cylindrical structure, including a movable bellows and a stabilizing roller chamber, and the downward furnace shell adopts a square structure, including an electric radiation heating tube; the upward furnace shell of the rapid cooling section is installed first, then the furnace top chamber is installed, and finally the downward furnace shell of the rapid cooling section is installed.

[0024] The installation method of the ascending furnace shell of the rapid cooling section is as follows:

[0025] Pre-assemble two semicircular furnace shells and movable bellows tracks on the ground in sections, hoist the two assembled semicircular furnace shells to the target positions respectively, adjust the tracks, and then install the next section of the furnace shell; install a stabilizing roller chamber on the furnace shell in the middle section of the intermediate furnace chamber, and keep the center of the stabilizing roller chamber consistent with the center of the cylindrical furnace shell.

[0026] The levelness of the moving bellows track is adjusted by means of shims.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. By projecting the installation reference line of the furnace bottom plane onto the furnace top steel structure platform and adding an auxiliary center line, the reliability and accuracy of the furnace shell equipment correction are improved.

[0029] 2. The preheating section is assembled modularly with the furnace shell on the ground and hoisted together with the furnace shell. After the furnace shell is adjusted, the nozzle is adjusted with the strip steel as the reference hole through the elliptical hole connected to the nozzle. The installation is quick and the furnace shell can be calibrated quickly.

[0030] 3. The furnace top chamber and furnace bottom chamber of the heating section are installed in a modular manner; the middle furnace chamber is composed of end panels and side panels and is supplied as a single piece. The side panels on both sides are hoisted first, and then the wall panels at both ends are hoisted. The furnace shell is quickly corrected through the adjustable pull rod support frame; the refractory materials and anchors in the furnace are installed by setting up a temporary scaffolding, which is dual-purpose and efficient and convenient.

[0031] 4. The SCS furnace shell of the slow cooling section is installed in a modular segmented manner. The lower furnace bottom chamber and the furnace top chamber are hoisted as a whole. The wind box and refractory materials of the middle furnace chamber are completed before hoisting and are modularly assembled and hoisted together with the furnace shell. The installation is fast and the furnace shell can be adjusted quickly.

[0032] 5. The installation of the RCS furnace shell of the rapid cooling section adopts a modular segmented installation method. The installation of the cylindrical furnace shell, movable wind box and stabilizing roller chamber of the rapid cooling section furnace shell adopts the installation method of the furnace shell of the preheating section. The installation of the furnace shell of the downward cooling section adopts the installation method of the furnace shell of the slow cooling section. The modular installation is efficient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the center line and leveling point settings of the annealing furnace of the present invention.

[0034] Figure 2 for Figure 1 A partial enlarged view of .

[0035] Figure 3 This is a schematic diagram of the modular segmented installation of the preheating section furnace shell of the annealing furnace of the present invention.

[0036] Figure 4 for Figure 3 Cross-section along AA.

[0037] Figure 5 This is a schematic diagram of the installation of the cylindrical furnace shell and nozzle of the preheating section of the annealing furnace of the present invention.

[0038] Figure 6 This is a schematic diagram of the installation of the stabilizing roller chamber in the preheating section of the annealing furnace of the present invention.

[0039] Figure 7 This is a schematic diagram of the modular segmented installation of the furnace shell of the heating section of the annealing furnace of the present invention.

[0040] Figure 8 for Figure 7 Cross-section along AA.

[0041] Figure 9 This is a schematic diagram of the installation of the furnace shell of the heating section of the annealing furnace of the present invention.

[0042] Figure 10 This is a schematic diagram of the installation and adjustment of the furnace shell of the heating section of the annealing furnace of the present invention.

[0043] Figure 11 This is a schematic diagram of the modular segmented installation of the furnace shell of the slow cooling section of the annealing furnace of the present invention.

[0044] Figure 12 for Figure 11 Longitudinal section of .

[0045] Figure 13 This is a schematic diagram of the modular segmented installation of the furnace shell of the rapid cooling section of the annealing furnace of the present invention.

[0046] Figure 14 This is a schematic diagram of the installation and correction of the movable bellows in the rapid cooling section of the annealing furnace of the present invention.

[0047] Among them, the markings in the figure are: 1-steel structure; 2-furnace shell; 3-temporary support; 4-vertical line; 5-jack; 6-nozzle; 1-1-lower furnace bottom chamber of preheating section; 1-2~1-5-middle furnace chamber of preheating section; 1-6-top chamber of preheating section; 2-1-lower furnace bottom chamber of heating section; 2-1~2-7-middle furnace chamber of heating section; 2-8-top chamber of heating section; 3-1~3-2-lower furnace bottom chamber of slow cooling section; 3-3~3-9-middle furnace chamber of slow cooling section; 3-10-top chamber of slow cooling section; 4-1~4-3-ascending furnace shell of fast cooling section; 4-4~4-5-top chamber of fast cooling section; 4-6~4-9-descending furnace shell of fast cooling section; S*-vertical and horizontal reference numbers, among which * represents numbers or letters in the figure. DETAILED DESCRIPTION

[0048] The structure and working process of the present invention will be further described below with reference to the accompanying drawings.

[0049] This patented invention considers improvements to the furnace shell installation process. Based on the structural type of each section of the annealing furnace, a modular pre-assembled furnace shell is selectively adopted for overall installation. Post-assembly fixing and protection measures are also added. After the furnace shell welding is completed, the refractory materials inside the furnace are constructed, and finally, the furnace rollers, radiant tubes, and other equipment are installed. This vertical annealing furnace is characterized by "modularization" and "quick installation," achieving the goal of rapid installation of the vertical annealing furnace and shortening the installation and adjustment time of the furnace equipment.

[0050] A modular installation method for a vertical annealing furnace includes: first, modular designing the vertical annealing furnace; then, setting the center line and leveling point of the annealing furnace before installation; and then modularly installing the furnace shells of the preheating section, heating section, slow cooling section, and fast cooling section in sequence, wherein:

[0051] When setting the center line and level point of the annealing furnace, first set the vertical and horizontal center lines and level points at the bottom of the annealing furnace. After the installation of the annealing furnace steel structure platform is completed, set permanent vertical and horizontal auxiliary center lines and level points on the top platform of the annealing furnace.

[0052] The modular installation of the preheating section furnace shell, heating section furnace shell, and slow cooling section furnace shell includes the installation of the lower furnace bottom chamber, multi-section intermediate furnace chambers, and upper furnace top chamber;

[0053] The modular installation of the rapid cooling section furnace shell includes the installation of the rapid cooling section ascending furnace shell, furnace top chamber, and rapid cooling section descending furnace shell.

[0054] Specific embodiments, such as Figures 1 to 14 As shown,

[0055] First, the structures of various parts of the vertical annealing furnace are modularly designed, among which the preheating section furnace shell module includes the lower furnace bottom chamber 1-1 of the preheating section, the middle furnace chambers 1-2 to 1-5 of the preheating section, and the upper furnace top chamber 1-6; the heating section furnace shell module includes the lower furnace bottom chamber 2-1 of the heating section, the middle furnace chambers 2-1 to 2-7 of the heating section, and the heating section furnace top chamber 2-8; the slow cooling section furnace shell module includes the lower furnace chambers 3-1 to 3-2 of the slow cooling section, the middle furnace chambers 3-3 to 3-9 of the slow cooling section, and the upper furnace top chamber 3-10 of the slow cooling section; the fast cooling section furnace shell module includes the fast cooling section ascending furnace shell 4-1 to 4-3, furnace top chambers 4-4 to 4-5, and the fast cooling section descending furnace shell 4-6 to 4-9.

[0056] Then, set the center line and level point of the annealing furnace before installation. The specific method is as follows:

[0057] First, the main axis of the annealing furnace should be measured, and then the rectangular control network should be measured and set up, that is, the vertical and horizontal center lines and level points should be set at the bottom of the annealing furnace. Many numbers are marked in the specific vertical and horizontal reference line diagrams, such as SE, SF, S1, S2, etc., as identification. The rest have the same functions and are not listed here. Before the installation of the furnace shell, a comprehensive visual inspection should be carried out on each point on the main axis. Because it is inconvenient to see through the furnace shell after installation, necessary control platforms should be added to the platform of the annealing furnace as rear-view points during the visual inspection. In order to install the furnace shell, adjust the furnace rollers and subsequent maintenance, permanent vertical and horizontal auxiliary center lines and level points should be set on the top platform of the annealing furnace after the installation of the annealing furnace steel structure platform is completed; see Figure 1, Figure 2 Annealing furnace center line and level point setting.

[0058] Then, the furnace shells of the preheating section, heating section, slow cooling section and fast cooling section are modularly installed in sequence.

[0059] 1. The modular installation method of the preheating furnace shell is as follows:

[0060] (1) The installation of the preheating furnace shell mainly involves the installation of the cylindrical furnace shell, the nozzle 6 and the middle stabilizing roller chamber. To ensure that the strip can run stably in the furnace, it is necessary to ensure that the center of the stabilizing roller chamber is consistent with the entrance seal.

[0061] First install the lower furnace chamber, then the middle furnace chamber, and finally hoist the furnace top chamber.

[0062] (2) Installation of cylindrical furnace shell and nozzle (this process is applicable to vertical annealing furnaces for continuous annealing CAL, galvanized CGL and high-strength steel CAGL): After the furnace bottom chamber installation is completed and the expansion joint and reducer are in place, the cylindrical furnace shell can be installed. The cylindrical furnace shell is assembled from two semicircles, so it must be assembled on the ground before hoisting. The alignment of the cylindrical furnace shell must be based on the elevation of the air duct inlet and outlet on the shell to facilitate the interface of the circulating air duct in the later stage; the center should be based on the center of the internal nozzle 6 to ensure uniform airflow of the nozzle in the furnace. When welding after the cylindrical furnace shell is installed, pay attention to symmetrical welding to avoid and reduce welding deformation. The nozzle can be assembled on the ground and hoisted together with the furnace shell. After the furnace shell is adjusted, the nozzle can be adjusted with the strip steel as the reference hole through the elliptical hole connected to the nozzle.

[0063] (3) Installation of the stabilizing roller chamber (this process is applicable to CAL and CGL vertical annealing furnaces): The stabilizing roller chamber is located on the upper part of the second cylindrical furnace shell. After the cylindrical furnace shell is adjusted and fixed, the stabilizing roller chamber can be installed. The stabilizing roller plays a connecting role in the preheating section and is the key to ensuring the vertical and stable operation of the strip in the furnace. Therefore, the center must be consistent with the bottom and top furnace chambers. Since the stabilizing roller connection is a circular hole with a small adjustment margin, the elevation and level can only be adjusted by adding or removing shims on the four support seats of the stabilizing roller chamber. According to the requirements of the drawings, the allowable error is within 1 mm.

[0064] 2. The heating furnace has the largest amount of equipment and pipelines and the most processes. First install the lower furnace bottom chamber, then install the middle furnace chamber. The middle furnace chamber is composed of end panels and side panels and is supplied as a single piece. First hoist the side panels on both sides, then hoist the wall panels at both ends, and finally hoist the furnace top chamber.

[0065] The heating section furnace shell is installed from the middle of the heating furnace to both ends, or from one end to the other, according to the following steps:

[0066] Step 1: Install the furnace bottom chamber;

[0067] Step 2: Install the side panels and end wall panels of the middle furnace chamber in sequence;

[0068] Step 3: Install the furnace top chamber. After installation, adjust and calibrate the furnace shell. After calibration, use a temporary support frame to fix the furnace shell.

[0069] Step 4: Seal and weld the interfaces between the furnace walls and between the furnace walls and the furnace bottom and furnace top, then remove the temporary support frame and install the formal adjustable tie rod support frame;

[0070] Step 5: After the heating section furnace shell is installed and welded, scaffolding is set up inside to carry out the construction of refractory materials in the furnace. After the refractory materials are accepted, the radiation tube and other furnace equipment are installed.

[0071] The following methods are used to adjust and calibrate the furnace shell:

[0072] Hang a plumb line 4 on the top of the furnace wall and use a jack 5 to check and adjust the verticality of the furnace wall; use the center of the furnace roller assembly hole on the furnace wall as a reference to check and adjust the center position and elevation of the furnace wall, and at the same time check and adjust the flatness of the furnace wall. The installation accuracy of the furnace shell is shown in Table 1 below:

[0073] Table 1

[0074] project Location Accuracy Centerline (vertical) A ±5.0mm Centerline (horizontal) B ±2.0mm elevation H ±3.0mm

[0075] If the flatness exceeds the tolerance, adjustments should be made. After the furnace wall is adjusted, temporary brackets 3 are welded between the furnace wall and the process steel structure 1 to secure the furnace shell 2. The interfaces between the furnace walls and between the furnace wall and the furnace bottom are sealed with welds. Finally, the official adjustable tie rod support frame is installed, and the temporary brackets 3 are removed.

[0076] 3. The modular installation method of the slow cooling section furnace shell is as follows:

[0077] The furnace shell of the slow cooling section is connected to the cooling equipment, which includes a bellows, a circulating fan, a water / protective gas heat exchanger, and a circulating pipe. Spray holes are arranged on both sides of the bellows strip. When the furnace shell is installed, the outside of the joint is fully welded all around, and the elevation of the furnace shell is adjusted based on the center of the bellows inlet or outlet.

[0078] The slow cooling section furnace shell also utilizes a square, welded, airtight carbon steel structure. Supported by a process steel structure, the shell compensates for thermal expansion differences with the soaking section via expansion joints connecting the two shell sections. The shell is connected to four cooling systems, each consisting of a bellows, circulating fan, water / shielding gas heat exchanger, and circulation piping. To ensure efficient cooling, each bellows strip is equipped with spray holes on both sides. During installation, the shell is fully welded on all sides of the outer seam to ensure airtightness. The shell elevation is adjusted and inspected based on the center of the bellows inlet or outlet.

[0079] The SCS furnace shell for the slow cooling section is installed in a modular, segmented manner: the lower furnace chamber is installed first, followed by the middle chamber, and finally the top chamber. The wind box and refractory materials for the middle chamber are completed before installation.

[0080] 4. The rapid cooling section shell is divided into two parts: the upward cooling section and the downward cooling section. The upward cooling section shell is cylindrical and includes a moving bellows and a stabilizing roller chamber. The downward cooling section shell is square and utilizes electric radiant tube heating to prevent strip overcooling during low-temperature production and to control furnace temperature. Installation of the upward cooling section's cylindrical shell, moving bellows, and stabilizing roller chamber is similar to that of the preheating section shell, while installation of the downward cooling section shell is similar to that of the slow cooling section. Install the upward cooling section shell first, followed by the furnace roof chamber, and finally, the downward cooling section shell.

[0081] The installation method of the ascending furnace shell of the rapid cooling section is as follows:

[0082] Pre-assemble two semicircular furnace shells and movable bellows tracks on the ground in sections, hoist the two assembled semicircular furnace shells to the target positions respectively, adjust the tracks, and then install the next section of the furnace shell; install a stabilizing roller chamber on the furnace shell in the middle section of the intermediate furnace chamber, and keep the center of the stabilizing roller chamber consistent with the center of the cylindrical furnace shell.

[0083] The installation of the mobile bellows begins with the installation of the bellows track. Track adjustment can be performed after the first section of the furnace shell is installed. The horizontal center of the track is adjusted based on Y2-Y2, with an allowable deviation of less than 1mm. The horizontality of the track is adjusted using the supplied shims. To ensure the stability of the bellows movement, the deviation must be controlled within 0.1mm.

[0084] The present invention provides a modular rapid installation method for a vertical annealing furnace to achieve the purpose of rapid installation of the vertical annealing furnace and shorten the installation and adjustment time of the furnace equipment. The advantages are specifically shown as follows:

[0085] (1) The reliability and accuracy of furnace shell equipment calibration are improved by projecting the installation reference line of the furnace bottom plane onto the furnace top steel structure platform and adding an auxiliary center line.

[0086] (2) The preheating section is assembled modularly with the furnace shell on the ground and hoisted together with the furnace shell. After the furnace shell is adjusted, the nozzle is adjusted with the strip steel as the reference hole through the elliptical hole connected to the nozzle. The installation is quick and the furnace shell can be calibrated quickly.

[0087] (3) The furnace top chamber and furnace bottom chamber of the heating section are installed in a modular manner; the middle furnace chamber is supplied as a single piece consisting of end panels and side panels. The side panels on both sides are hoisted first, and then the wall panels at both ends are hoisted. The furnace shell is quickly corrected through the adjustable pull rod support frame; the refractory materials and anchors in the furnace are installed by setting up a temporary scaffolding, which is dual-purpose and efficient and convenient.

[0088] (4) The SCS furnace shell of the slow cooling section is installed in a modular segmented manner. The lower furnace bottom chamber and the furnace top chamber are hoisted as a whole. The wind box and refractory materials of the furnace middle chamber are completed before hoisting and are modularly assembled and hoisted together with the furnace shell. The installation is fast and the furnace shell can be adjusted quickly.

[0089] (5) The installation of the RCS furnace shell of the rapid cooling section adopts a modular segmented installation method. The installation of the cylindrical furnace shell, movable bellows and stabilizing roller chamber of the rapid cooling section furnace shell adopts the installation method of the furnace shell of the preheating section, and the installation of the furnace shell of the downward cooling section adopts the installation method of the furnace shell of the slow cooling section. The modular installation is efficient and fast.

[0090] The present invention and its features, configurations, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals indicate like parts throughout the drawings. The drawings are not drawn to scale, with emphasis placed on illustrating the subject matter of the present invention. Reference numerals in the drawings that are not explained in the text represent common knowledge in the art and, as such, are understood by those skilled in the art.

[0091] The above describes the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and the devices and structures that are not described in detail should be understood to be implemented in a common manner in the art; any technician familiar with the art can use the above-mentioned disclosed methods and technical contents to make many possible changes and modifications to the technical solutions of the present invention without departing from the scope of the technical solutions of the present invention, or modify them into equivalent embodiments of equivalent changes, which does not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention that do not depart from the content of the technical solutions of the present invention are still within the scope of protection of the technical solutions of the present invention.

Claims

1. A modular installation method for a vertical annealing furnace, characterized by: First, the vertical annealing furnace is modularly designed. Then, the center line and level point of the annealing furnace are set before installation. Then, the furnace shells of the preheating section, heating section, slow cooling section, and fast cooling section are modularly installed in sequence. When setting the center line and level point of the annealing furnace, first set the vertical and horizontal center lines and level points at the bottom of the annealing furnace. After the installation of the annealing furnace steel structure platform is completed, set permanent vertical and horizontal auxiliary center lines and level points on the top platform of the annealing furnace. The modular installation of the preheating section furnace shell, heating section furnace shell, and slow cooling section furnace shell includes the installation of the lower furnace bottom chamber, multi-section intermediate furnace chambers, and upper furnace top chamber; The modular installation of the rapid cooling section furnace shell includes the installation of the rapid cooling section upward furnace shell, furnace top chamber, and rapid cooling section downward furnace shell; the annealing furnace center line and leveling point are set as follows: First, the main axis of the annealing furnace is measured, and then the rectangular control network is measured and set up, that is, the vertical and horizontal center lines and level points are set at the bottom of the annealing furnace. The specific vertical and horizontal reference line drawings are marked with many numbers as identifications; before the installation of the furnace shell, a comprehensive visual inspection is first carried out on the points on each main axis. At the same time as the visual inspection, a control platform is added to the platform of the annealing furnace as a rear view point; after the installation of the annealing furnace steel structure platform is completed, permanent vertical and horizontal auxiliary center lines and level points are set on the top platform of the annealing furnace.

2. The modular installation method of a vertical annealing furnace according to claim 1, characterized in that: The intermediate furnace chamber of the preheating section furnace shell consists of multiple sections. After the furnace bottom chamber is installed, the two semicircular furnace shells and nozzles of each section of the intermediate furnace chamber are first modularly assembled on the ground. Then, the two assembled semicircular furnace shells are hoisted to the target positions respectively, and after adjustment, they are assembled into a cylindrical furnace shell, and finally the nozzle is adjusted.

3. The modular installation method of a vertical annealing furnace according to claim 2, characterized in that: A stabilizing roller chamber is installed on the furnace shell of the middle furnace chamber in the preheating section, and the center of the stabilizing roller chamber is consistent with the center of the furnace bottom chamber and the furnace top chamber.

4. The modular installation method of a vertical annealing furnace according to claim 3, characterized in that: The elevation and level of the roller chamber can be adjusted by adding or removing the four support seat gaskets to stabilize the roller chamber.

5. The modular installation method of a vertical annealing furnace according to claim 1, characterized in that: The heating section furnace shell is installed from the middle of the heating furnace to both ends, or from one end to the other, according to the following steps: Step 1: Install the furnace bottom chamber; Step 2: Install the side panels and end wall panels of the middle furnace chamber in sequence; Step 3: Install the furnace top chamber. After installation, adjust and calibrate the furnace shell. After calibration, use a temporary support frame to fix the furnace shell. Step 4: Seal and weld the interfaces between the furnace walls and between the furnace walls and the furnace bottom and furnace top, then remove the temporary support frame and install the formal adjustable tie rod support frame; Step 5: Carry out the construction of refractory materials in the furnace and install the equipment in the furnace.

6. The modular installation method of a vertical annealing furnace according to claim 5, characterized in that: The following methods are used to adjust and calibrate the furnace shell: Hang a plumb line on the top of the furnace wall to check and adjust the verticality of the furnace wall; use the center of the furnace roller assembly hole on the furnace wall as a reference to check and adjust the center position and elevation of the furnace wall, and at the same time check and adjust the flatness of the furnace wall.

7. The modular installation method of a vertical annealing furnace according to claim 1, characterized in that: The furnace shell of the slow cooling section is connected to the cooling equipment, which includes a bellows, a circulating fan, a water / protective gas heat exchanger, and a circulating pipe. Spray holes are arranged on both sides of the bellows strip. When the furnace shell is installed, the outside of the joint is fully welded all around, and the elevation of the furnace shell is adjusted based on the center of the bellows inlet or outlet.

8. The modular installation method of a vertical annealing furnace according to claim 1, characterized in that: The upward furnace shell of the rapid cooling section adopts a cylindrical structure, including a movable bellows and a stabilizing roller chamber, and the downward furnace shell adopts a square structure, including an electric radiation heating tube; the upward furnace shell of the rapid cooling section is installed first, then the furnace top chamber is installed, and finally the downward furnace shell of the rapid cooling section is installed.

9. The modular installation method of a vertical annealing furnace according to claim 8, characterized in that: The installation method of the ascending furnace shell of the rapid cooling section is as follows: Pre-assemble two semicircular furnace shells and movable bellows tracks on the ground in sections, hoist the two assembled semicircular furnace shells to the target positions respectively, adjust the tracks, and then install the next section of the furnace shell; install a stabilizing roller chamber on the furnace shell in the middle section of the intermediate furnace chamber, and keep the center of the stabilizing roller chamber consistent with the center of the cylindrical furnace shell.

10. The modular installation method of a vertical annealing furnace according to claim 9, characterized in that: The levelness of the moving bellows track is adjusted by means of shims.

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