Installation method of single-pier double-kiln type large rotary kiln barrel

Abstract

The invention provides a mounting method of a single-pier double-kiln type large rotary kiln barrel, which is based on a barrel mounting method of double rotary kilns in which two rotary kilns are positioned on the same foundation pier side by side, hoisting sequence distribution is performed on kiln bodies in sections, and due to the fact that the rotary kilns are delivered and transported in sections, in the early stage of hoisting in-place work, hoisting sequence distribution is performed on the rotary kilns in sections. The barrel segments are placed at the positions close to all crane standing positions, hoisting is conveniently conducted after the cranes reach the point positions, the risk that the cranes move for a long distance after hoisting heavy barrels is avoided, through reasonable distribution such as crane standing positions and barrel segment pre-hoisting positions, installation of the two rotary kilns is completed within the shortest time, and the installation efficiency is improved. The method is high in speed, high in efficiency, capable of reducing a large amount of cost and high in economic benefit.

Description

Technical Field

[0001] The present invention relates to the technical field of the installation of large rotary kiln cylinders in the form of single pier and double kilns in the metallurgical industry. Specifically, it relates to an installation method for the cylinders of large rotary kilns in the form of single pier and double kilns. Background Art

[0002] In the metallurgical industry, rotary kilns mainly undertake functions such as the pretreatment of steelmaking raw materials, the smelting of ferroalloys, and the sintering of iron and steel burden. It is generally designed on a foundation several meters high. There are tyre rings and large gear rings on its cylinder. Among them, the tyre rings contact the supporting rollers fixed on the foundation, playing an auxiliary supporting / rotating role, and the driving device drives the entire rotary kiln to rotate by rotating the large gear ring.

[0003] For the hoisting and assembly operation of the cylinders of super-hundred-meter large rotary kilns with two rotary kilns arranged side by side on the same foundation pier, they are heavy, have high hoisting requirements, and are greatly restricted by the site. Its cooling circulation water pool is located between the two kiln pier foundations. This design, together with the workshops on the front and back sides of the rotary kiln, and the design of two rotary kilns sharing one kiln pier foundation, seriously affects problems such as the hoisting and installation sequence and the crane standing position, making the installation of rotary kilns of this design difficult. Therefore, how to quickly complete the installation work of the cylinders of large rotary kilns in the form of single pier and double kilns is an urgent problem to be solved in the field of industrial metallurgical engineering technology. Summary of the Invention

[0004] In view of this, the present invention proposes an installation method for the cylinders of large rotary kilns in the form of single pier and double kilns, including:

[0005] Positioning the kiln pier and the supporting device. After the kiln pier foundation is set up, install the supporting device on the kiln pier;

[0006] Installing the tyre rings of the kiln body. Install the tyre rings of the cylinder body section directly supported by the supporting device to form a combined tyre ring section of the kiln body, and set stoppers for the tyre rings;

[0007] Installing the cylinders of the double kilns in segments. First, place the cylinder of the combined tyre ring section of the kiln body on the supporting device, then install the cylinder of the suspended section of the kiln body, and conduct team docking for the adjacent cylinders.

[0008] Further, after the tyre rings are installed in place, weld stop irons on both sides of the tyre rings as stoppers.

[0009] Further, after the combined tyre ring section of the kiln body is installed on the supporting device, install a temporary support at a preset position on one side of the cylinder body and the tyre rings in the material rolling direction.

[0010] Further, for the combined tyre ring section of the kiln body corresponding to the large gear ring, first install the combined tyre ring section of the kiln body, and then immediately install the large gear ring on the preset position of the corresponding cylinder body.

[0011] Further, when installing the kiln body cylinder of the suspended section between adjacent two kiln body tyre combination sections, after one suspended section cylinder is hoisted in place and kept in a suspended state, wait until the suspended section cylinder to be docked with it is hoisted in place. After the corresponding docking is completed, then release the hoisting of the two suspended section cylinders.

[0012] Further, during the installation of the double kiln cylinder, when installing the kiln body cylinder at the position where there is a circulating water pool, position the cranes on both sides of the circulating water pool to reduce the number of times the crane is mobilized.

[0013] Further, the method for assembling and docking adjacent cylinders is as follows: Manually enter the fixed cylinder and use the assembly tool to complete the assembly.

[0014] Further, the welding is carried out after the overall assembly of the double kiln cylinders is completed.

[0015] Further, when docking between adjacent cylinders, at least 12 sets of tension bolts are used to connect the interfaces of each section of the cylinder.

[0016] Further, the hoisting method of the cylinder is as follows: The cylinder is circularly pulled by any one of the two crawler cranes, and the other crawler crane hoists the next section of the cylinder and docks in the air. When the kiln body is hoisted in place, the adjacent two sections should be aligned with the position marks of the cylinder.

[0017] The installation method of the large rotary kiln cylinder in the form of a single pier and double kilns provided by the present invention has the following advantages: Based on the installation method of the cylinders of the double rotary kilns with two rotary kilns arranged side by side on the same foundation pier, the hoisting sequence of the kiln body segments is allocated. Since the rotary kiln is shipped in sections of the cylinder, in the early stage of the hoisting and installation work, place the cylinder sections near each crane station point, which is convenient for the crane to hoist after reaching the point, and avoid the risk of the crane moving a long distance after lifting the heavy cylinder. Through reasonable allocation, such as the crane station point and the pre-hoisting position of the cylinder section, the installation of the two rotary kilns can be completed in the shortest time. This method is fast, efficient, can reduce a large amount of costs, and has high economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present invention. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0019] Figure 1 It is a step diagram of the installation method of the large rotary kiln cylinder in the form of a single pier and double kilns provided by the embodiment of the present invention;

[0020] Figure 2 It is a schematic diagram of the overall installation structure of the single pier and double kilns provided by the embodiment of the present invention;

[0021] Figure 3 This is a schematic structural diagram of the support state of the kiln body tyre combination section provided by the embodiment of the present invention;

[0022] Figure 4 This is a schematic structural diagram of the tyre support provided by the embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the cylinder body alignment tool provided by the embodiment of the present invention;

[0024] In the figure, 1, rotary kiln cylinder body; 2, tyre; 3, supporting roller; 4, supporting roller bearing; 5, base; 6, temporary support; m1, the first section of the cylinder body of Line A; m2, the second section of the cylinder body of Line A; m3, the third section of the cylinder body of Line A; m4, the fourth section of the cylinder body of Line A; m5, the fifth section of the cylinder body of Line A; m6, the sixth section of the cylinder body of Line A; m7, the seventh section of the cylinder body of Line A; m8, the eighth section of the cylinder body of Line A; m9, the ninth section of the cylinder body of Line A; m10, the tenth section of the cylinder body of Line A; m11, the eleventh section of the cylinder body of Line A; m12, the twelfth section of the cylinder body of Line A; m13, large gear ring of Line A; n1, the first section of the cylinder body of Line B; n2, the second section of the cylinder body of Line B; n3, the third section of the cylinder body of Line B; n4, the fourth section of the cylinder body of Line B; n5, the fifth section of the cylinder body of Line B; n6, the sixth section of the cylinder body of Line B; n7, the seventh section of the cylinder body of Line B; n8, the eighth section of the cylinder body of Line B; n9, the ninth section of the cylinder body of Line B; n10, the tenth section of the cylinder body of Line B; n11, the eleventh section of the cylinder body of Line B; n12, the twelfth section of the cylinder body of Line B; n13, large gear ring of Line B; A, basic kiln pier A; B, basic kiln pier B; C, basic kiln pier C; D, basic kiln pier D. Detailed implementation manners

[0025] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in combination with the embodiments.

[0026] The present invention provides an installation method for the cylinder body of a large rotary kiln in the form of a single pier and two kilns. Referring to Figure 1 as shown, it includes:

[0027] Step 1: Position the kiln pier and the support device. After the kiln pier foundation is set up, install the support device on the kiln pier;

[0028] Step 2: Install the tyre on the kiln body. Install the tyre on the barrel section of the kiln body directly supported by the support device to form a combined tyre section of the kiln body, and set a stop for the tyre.

[0029] Step 3: Install the barrel sections of the double kilns in segments. First, place the barrel of the combined tyre section of the kiln body on the support device, then install the barrel of the suspended section of the kiln body, and align and connect each adjacent barrel.

[0030] Further, after the tyre is installed in place, weld stop blocks on both sides of the tyre as stops.

[0031] In this embodiment, after the combined tyre section of the kiln body is installed on the support device, install a temporary support at a preset position on one side of the barrel and the tyre in the material rolling direction.

[0032] In this embodiment, for the combined tyre section of the kiln body corresponding to the large gear ring, first install the combined tyre section of the kiln body, and then immediately install the large gear ring on the preset position of the corresponding barrel.

[0033] In this embodiment, when installing the barrel of the suspended section between two adjacent combined tyre sections of the kiln body, after one suspended section barrel is hoisted in place and remains in a suspended state, wait until the suspended section barrel to be docked with it is hoisted in place. After the corresponding docking is completed, then release the hoisting of the two suspended section barrels.

[0034] In this embodiment, during the installation of the double kiln barrels, when installing the barrel of the kiln body at the position where there is a circulating water pool, position the cranes on both sides of the circulating water pool to reduce the number of crane transfers.

[0035] In this embodiment, the method for aligning and connecting each adjacent barrel is as follows: Manually enter the fixed barrel and use alignment tools to complete the alignment.

[0036] In this embodiment, the double kiln barrels are welded after the overall alignment is completed.

[0037] In this embodiment, when docking adjacent barrels, at least 12 sets of tension bolts are used to connect the interfaces of each barrel section.

[0038] In this embodiment, the method for hoisting the barrel is as follows: Let any one of the two crawler cranes circulate and hold the barrel, and the other crawler crane hoists the next barrel section and docks it in the air. When the kiln body is hoisted in place, the adjacent two sections should be aligned with the position marks of the barrel.

[0039] The preferred embodiment of a method for installing the barrel of a large rotary kiln in the form of a single pier and double kilns disclosed in the present invention is as follows: Use a crane throughout the process to complete the positioning of each component. The principle is as follows: Figure 2For example, a large rotary kiln with a single pier and double kilns is designed with a factory building structure outside the cylinders of number m1, number m12, number n1, and number n12. The basic kiln piers are divided into four parts: A, B, C, and D. There is a circulating water pool E between the basic kiln piers A and B. After the basic kiln piers and kiln body support devices are in place, the double rotary kiln cylinders are ready to be hoisted. The side-by-side double rotary kilns targeted by the present invention are long in length and large in diameter. A single kiln will be shipped in more than ten sections for transportation and hoisting installation. Figure 1 As shown, for example, each kiln is shipped in 12 sections, namely Figure 2 The serial numbers are m1 to m12, and n1 to n12. First, hoist the cylinder of the kiln body section directly supported by the foundation kiln pier. This part of the kiln body cylinder section generally has wheels. The wheels are installed on the ground in advance before hoisting it into place. Because the center of gravity is not located at the wheels, after this part of the kiln body section is in place, it is necessary to weld a support frame to support and fix it to assist in the subsequent docking of the suspended kiln body section, and then install the large gear ring. Finally, hoist the cylinder of the suspended kiln body section according to the on-site conditions. The hoisting requires the cooperation of at least two cranes. The temporary assembly method when hoisting the cylinder is to manually enter the fixed cylinder and use a special cylinder assembly tool. Refer to Figure 5 As shown in the figure, the assembly is completed, and welding is performed after the rotary kiln is assembled as a whole. Before all cylinders are hoisted, the stopper position is adaptively adjusted according to the designed rotary kiln inclination angle to make the cylinder placement and docking more convenient. The overall hoisting method is to have the cylinder cyclically pulled by any one of the two crawler cranes, and the other crawler crane hoists the next section of the cylinder and docks it in the air. When the cylinder is hoisted into place, the two adjacent sections must be aligned with the zero mark of the cylinder, and each section of the cylinder interface is connected using no less than 12 sets of tension bolts provided by the supplier.

[0040] The overall hoisting sequence of the cylinder of the double kiln is as follows. For the convenience of description, the two kilns are divided into lines A and B: Line A m5+tyre→Line A big gear ring m13→Line A m8+tyre→Line A m1+tyre→Line A m12→Line A m9→Line A m10→Line A m6→Line A m7→Line B n5+tyre→Line A m2+tyre→Line B big gear ring n13→Line B n2+tyre→Line B n8+tyre→Line B n11+tyre→Line B n12→Line B n9→Line B n10→Line B n6→Line B n7→Line B n4→Line B n3→Line B n1→Line A m4→Line A m3→Line A m1. The specific operation method is as follows:

[0041] Step 1: The tyre set on the kiln body section cylinder directly supported by the kiln body foundation, refer to Figure 3 The present invention is aimed at the parallel double rotary kiln exceeding 100 meters. The single kiln will be shipped in sections for transportation and hoisting installation. Each kiln body generally has 2 to 4 sections with wheels, such as Figure 2For the eight sections of cylinders corresponding to serial numbers m2, m5, m8, m11, n2, n5, n8, and n11, before lifting these cylinders, it is necessary to put the wheel 2 on the ground to the corresponding position of the cylinder 1. After putting it to the corresponding designed position, iron stops are welded on both sides of the wheel 2 to prevent the wheel from slipping during lifting.

[0042] Step 2: Hang the wheel cylinder of the armor line, that is Figure 3 In the sequence numbers 1 and 2, 1 is the kiln body cylinder, and 2 is the wheel belt. The side-by-side double rotary kiln targeted by the present invention exceeds 100 meters, and a single kiln body will be shipped out of the factory in more than ten sections for transportation and hoisting installation. The kiln body cylinder 1 is directly placed on the corresponding kiln body supporting device, and the supporting device includes a supporting wheel 3, an axle 4 and a base 5. For double rotary kilns exceeding 100 meters, they are generally designed on four basic kiln piers, namely A, B, C, and D. Each basic kiln pier is designed with a corresponding kiln body supporting device in side by side. In this step, the wheel belt set of the supporting kiln body section cylinder on the basic kiln piers B, C, and D is hoisted into place. In particular, with Figure 2 For example, Figure 2 There is usually a factory building outside the foundation of the kiln piers A and D. There is a circulating water pool E between the foundations of kiln piers A and B. The crane cannot stand in the water pool. In this design, steps 1 and 2 will first hoist the components on the foundations of kiln piers B, C, and D. Figure 2 No. m2 is not hoisted, which can save a lot of crane shift time. Figure 2 The cylinders with serial numbers m1 and m12 are usually connected to the plant and pipelines in the design. In order to prevent the lack of space and increase the difficulty of installation, the cylinders with serial numbers m1 or m12 can be installed in time when the cylinder tyre sleeve is installed for easy installation. In this step, the hoisted tyre cylinder is the cylinder of a single line of line A.

[0043] Step 3: Temporarily fix the kiln body cylinder and the belt 2 mounted on it. Kiln body belt assembly section ( Figure 3 The serial numbers 1 and 2) are located on the kiln support device ( Figure 3 After the sequence number 3-5), because it has only one section, the rotary kiln is usually designed with an inclination angle. Generally speaking, the inclination angle is between 1° and 5°. A smaller inclination angle can improve the stability of the rotary kiln, reduce the vibration and friction of the equipment, and facilitate continuous production. A larger inclination angle can increase the material retention time of the rotary kiln, promote the calcination and reaction of the ore, and improve the quality and output of the product. Therefore, after the kiln body wheel band assembly section is in place, a temporary bracket needs to be welded on the side of the material rolling direction (i.e., the lower side), i.e. Figure 4 Serial number 6 is for reference only and should be adjusted according to the actual construction situation. It is used to block the wheel belt 2 to prevent the cylinder from sliding along the kiln body section. Similarly, the cylinder should also be welded with a temporary bracket to support the cylinder at a suitable position on the same side (without affecting other installation processes).

[0044] Step 4: Install the large gear ring.Figure 2 , the large gear ring m13 is located on the section of the cylinder body numbered m5 on the kiln pier foundation B, and the motor drive device drives the entire rotary kiln through the large gear ring m13 here. If the large gear ring is not completely assembled when delivered from the factory, it needs to be assembled on the ground. After assembly, it is hoisted and sleeved onto the fifth section of the cylinder body m5 that has been temporarily positioned on the kiln pier foundation B.

[0045] Step Five: Figure 2 Hoist the suspended cylinder bodies m6 and m7 of the right rotary kiln (Line A). Figure 2 Generally, there are workshops designed on the outer sides of the kiln body foundations numbered A and D. There is a circulating water tank E between the kiln body foundation A and the kiln body foundation B, and the crane cannot stand. Therefore, in this step, first hoist the cylinder bodies numbered m6, m7, m9, and m10. When installing the sixth section of the cylinder body m6, first use a crane to dock the cylinder body m6 with the cylinder body m5 that has been positioned and temporarily supported and fixed. Fix the installation of the cylinder body assembly device inside the cylinder body. At this time, the crane hoisting the cylinder body m6 cannot release the hook because the overall center of gravity of the assembled cylinder bodies m5 and m6 is offset, and it will collapse once the hook is released. It is necessary to continue hoisting until another crane completes the fixed installation of the cylinder body assembly device for the cylinder bodies m7, m6, and m8, and then the hook can be released. For Figure 2 example, the cranes hoisting the cylinder bodies m6 and m7 in this step are both located on the right side of the kiln body.

[0046] Step Six: Figure 2 Hoist the suspended cylinder body sections m9 and m10 of the right rotary kiln, that is, Line A. The hoisting sequence method is the same as in Step Five, but the cranes need to be positioned one on the left and one on the right on both sides of the cooling circulating water tank, that is, beside the kiln pier foundations A and B. Standing in this way, the crane can move to Figure 2 the hoisting position of the left rotary kiln cylinder body faster after completing the assembly of the cylinder bodies m9 and m10. Especially, according to the actual situation, the order of Step Five and Step Six can be swapped to facilitate speed.

[0047] Step Seven: Figure 2 Hoist the tyre cylinder body of the left rotary kiln, Line B. As mentioned above, after Steps Five and Six are completed, one crane a can directly reverse to Line B for hoisting, while the other crane b needs to bypass the circulating water tank E and reach Line B from Line A. During this process, crane b will pass by the kiln pier foundation A. At this time, the second section of the cylinder bodies m2 and n2 of the two rotary kilns can be positioned simultaneously, and at the same time, crane a is hoisting the tyre cylinder body of Line B. After crane b reaches Line B, it will basically complete the positioning of all tyre cylinder bodies at the same time as crane a.

[0048] Step Eight: Figure 2 Hoist the suspended cylinder bodies n6, n7, n9, and n10 of the left rotary kiln, Line B. The hoisting method is the same as in Step Five and Step Six. In Step Six, the one located at Figure 2After the crane on the right side of the rotary kiln finishes hoisting, it retracts its boom and moves to the left side. The two cranes simultaneously Figure 2 hoist the suspended cylinders n6, n7, n9, and n10 of the left rotary kiln (i.e., the cylinder body of the B-line in the attached drawing) one by one on the left side.

[0049] Step Nine: Figure 1 Hoist the suspended cylinders n3 and n4 of the left rotary kiln (i.e., the rotary kiln of the B-line). After Step Seven, due to the presence of a circulating water pool between the basic kiln piers A and B, the crane cannot take a position. One of the cranes, crane a, moves to the side of the water pool next to the basic kiln pier A. The crane b remaining on the side of the basic kiln pier B hoists the cylinder n4 and completes the alignment of the cylinder n4 and the cylinder n5. At this time, the crane a continuously holds the cylinder n4 until the crane b on the side of the basic kiln pier A completes the hoisting and alignment of the cylinder n3 and the cylinder n4. After the hoisting and alignment of the cylinders n3 and n4 are completed, the crane a on the side of the basic kiln pier B can unhook and move to the side of the basic kiln pier A for the next step, while the crane b on the side of the basic kiln pier A continuously holds the cylinder n03 and enters the next step.

[0050] Step Ten: Figure 2 Hoist the cylinder n1 of the left rotary kiln (i.e., the rotary kiln of the B-line). After the crane a arrives at the position, it can directly hoist and align the cylinder n1.

[0051] Step Eleven: Figure 1 Hoist the cylinders m1, m3, and m4 of the right rotary kiln (i.e., the rotary kiln of the A-line). The same operations as in Step Nine and Step Ten are performed to complete the hoisting and positioning of all the cylinders.

[0052] In summary, a method for installing the cylinder body of a large rotary kiln in the form of a single pier and double kilns disclosed in this embodiment has the following advantages: Based on the method for installing the cylinder bodies of a double rotary kiln with two rotary kilns arranged side by side on the same basic pier, the hoisting sequence of the kiln body is allocated in segments. Since the rotary kiln is shipped in segments of the cylinder body, in the early stage of the hoisting and positioning work, the cylinder body segments are placed near the positions of each crane's standing point, which is convenient for the crane to hoist after reaching the point, avoiding the risk of the crane moving a long distance after hoisting a heavy cylinder body. Through reasonable allocation, such as the crane's standing point and the pre-hoisting position of the cylinder body segments, the installation of the two rotary kilns is completed in the shortest time. This method is fast, efficient, can reduce a large amount of costs, and has high economic benefits.

[0053] It should be noted that in the description of the present invention, the terms indicating the direction or position relationship such as "up", "down", "left", "right", "inside", "outside", etc. are based on the direction or position relationship shown in the attached drawing. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0054] In addition, it should be noted that in the description of the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims

1. A method for installing a large rotary kiln cylinder in a single-pier double-kiln form, characterized in that: include: The kiln pier and supporting device are in place. After the kiln pier foundation is set, the supporting device is installed on the kiln pier; The kiln body tyre set, the tyre set of the kiln body barrel section directly supported by the supporting device, forms a kiln body tyre combination section, and a stopper is set for the tyre; The cylinder of the double kiln is installed in sections. First, the cylinder of the kiln wheel assembly section is placed on the supporting device, and then the cylinder of the suspended kiln section is installed, and the adjacent cylinders are teamed and docked.

2. The installation method of a large rotary kiln cylinder with a single pier and double kilns according to claim 1 is characterized in that: After the wheel band is installed to the preset position, stoppers are welded on both sides of the wheel band as stops.

3. The installation method of a large rotary kiln cylinder with a single pier and double kilns according to claim 1 is characterized in that: After the kiln body wheel belt assembly section is installed on the supporting device, a temporary bracket is installed at a preset position on one side of the material rolling direction of the cylinder and the wheel belt.

4. The installation method of a large rotary kiln cylinder with a single pier and double kilns according to claim 1 is characterized in that: Corresponding to the kiln body wheel band assembly section provided with the large gear ring, the kiln body wheel band assembly section is installed first, and then the large gear ring is installed to the preset position of the corresponding cylinder.

5. The installation method of a large rotary kiln cylinder with a single pier and double kilns according to claim 1 is characterized in that: When installing the suspended section of the kiln body cylinder between two adjacent kiln body wheel assembly sections, after one of the suspended sections of the cylinder is hoisted into place, it remains in a suspended state until the suspended section of the cylinder docking with it is hoisted into place and the corresponding docking is completed, and then the hoisting of the two suspended sections of the cylinder is released.

6. The installation method of a large rotary kiln cylinder with a single pier and double kilns according to claim 1 is characterized in that: During the installation of the double kiln cylinder, when installing the kiln cylinder at the location with the circulating water pool, cranes are positioned on both sides of the circulating water pool to reduce the number of crane movements.

7. The installation method of a large rotary kiln cylinder with a single pier and double kilns according to claim 1 is characterized in that: The method for teaming and docking adjacent cylinders is: manually enter the fixed cylinders and use a pairing tool to complete the pairing.

8. The installation method of a large rotary kiln cylinder with a single pier and double kilns according to claim 7 is characterized in that: The double kiln's cylinders are welded after they are assembled as a whole.

9. The installation method of a large rotary kiln cylinder with a single pier and double kilns according to claim 1 is characterized in that: When adjacent cylinders are butt-jointed, each cylinder interface is connected using at least 12 sets of tension bolts.

10. The installation method of a large rotary kiln cylinder with a single pier and double kilns according to claim 1, characterized in that: The method of hoisting the cylinder is as follows: the cylinder is cyclically pulled by any one of the two crawler cranes, and the other crawler crane hoists the next section of the cylinder and docks it in the air. When the kiln body is hoisted into place, the two adjacent sections must be aligned with the position marks of the cylinder.

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