Method for replacing supporting beam in desulfurizing tower

Abstract

The invention provides a method for replacing a supporting beam in a desulfurizing tower, and relates to the technical field of supporting beam replacement, the method comprises an old supporting beam mounted in an oxidation air pipe in the desulfurizing tower, and the replacement steps are as follows: firstly, two lifting points are respectively set above vertical tower walls at two ends of the old supporting beam, namely a first lifting point and a second lifting point; chain blocks are mounted on the two lifting points; wherein the chain block of the first lifting point is used for driving the new and old supporting beams to move horizontally, and the chain block of the second lifting point is used for supporting loads of the new and old supporting beams. According to the replacement method, in the implementation process, by means of supporting of the old supporting beam and the rolling wood, the new supporting beam can be rapidly moved to the position above the old supporting beam, then the old supporting beam is horizontally hoisted by means of supporting of the new supporting beam, under the effect of the chain block, the old supporting beam can be rapidly moved out of the tower, the whole replacement process is safe and reliable, and the replacement efficiency is improved. The replacement efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of support beam replacement, and particularly to a method for replacing a support beam inside a desulfurization tower. Background Technique

[0002] A desulfurization tower is a device used to remove sulfides from waste gas, mainly for desulfurization treatment of industrial waste gas. Industrial desulfurization towers mainly use an alkaline absorption liquid to contact and react with sulfur dioxide in the flue gas, converting it into substances such as sulfates or stearates, thereby achieving the purpose of desulfurization. Commonly used alkaline absorption liquids include sodium hydroxide, sodium carbonate, etc., which are widely used in industrial enterprises such as coal-fired power plants, steel plants, and cement plants to treat sulfur-containing waste gas generated during the combustion process, reduce sulfur dioxide emissions, and meet environmental protection requirements. During long-term use of the desulfurization tower, the old support beam inside will be damaged and needs to be replaced.

[0003] To solve the above problems, we propose a method for replacing a support beam inside a desulfurization tower to solve the above problems. Summary of the Invention

[0004] To solve the problems in the background technique, the present invention provides a method for replacing a support beam inside a desulfurization tower.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A method for replacing a support beam inside a desulfurization tower, including an old support beam installed in the oxidation air duct inside the desulfurization tower, and its replacement method includes the following steps: S1. First, set two lifting points above the vertical tower walls at both ends of the old support beam, namely the first lifting point and the second lifting point, and install chain hoists on both lifting points. Among them, the chain hoist at the first lifting point is used to drive the horizontal movement of the old and new support beams, and the chain hoist at the second lifting point is used to support the load of the old and new support beams. S2. Open a hole on the tower wall at one end of the old support beam for the old and new support beams to enter and exit. S3. Cooperate two cranes outside the tower, send one end of the new support beam into the tower through the hole, and then combine the chain hoist at the first lifting point inside the tower to move the new support beam above the old support beam. S4. Lift the new support beam to a certain height through the chain hoist at the second lifting point, then use the new support beam as a support and use a chain hoist to support the old support beam, and then cut the old support beam. After completion of the cutting, install a temporary support on the lower tower wall to temporarily carry the new support beam and assist in positioning the new support beam. S5. Lift the cut old support beam with a chain block until the old support beam is at the same horizontal level as the hole; then use the chain block at the first lifting point and cooperate with two cranes outside the tower to transfer the old support beam out of the tower through the hole. S6. When the old support beam is moved out of the tower, loosen the chain block at the second lifting point at this time, lower the new support beam to the installation position and carry out interrupted welding for positioning. S7. Remove the temporary support, and then weld and fix the new support beam, thus completing the replacement work.

[0006] Preferably, in S2, the bottom elevation of the hole needs to be higher than the upper elevation of the old support beam.

[0007] Preferably, in S3, when the new support beam is moved and conveyed into the tower, multiple groups of rollers are placed on the upper end surface of the old support beam for rolling and conveying the new support beam.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: In the replacement method of the present invention application, during the implementation process, with the support of the old support beam and rollers, the new support beam can be quickly moved above the old support beam, and then the old support beam is cut and horizontally lifted with the support of the new support beam. Under the action of the chain block and the crane, the old support beam can be quickly moved out of the tower. The whole replacement process is safe, reliable and has high replacement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic flow chart of the new support beam moving into the tower in the present invention; Figure 2 It is a schematic flow chart of the old support beam moving out of the tower in the present invention; Figure 3 It is a schematic structural diagram of the new support beam completed in installation in the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0010] The technical solutions in the embodiments of the present application are to solve the problems in the above background technology, and the general idea is as follows: Embodiment: Refer to Figure 1 - Figure 3 As shown, a method for replacing a support beam in a desulfurization tower in this embodiment includes an old support beam installed in the oxidation air duct in the desulfurization tower, and includes the following steps: S1. First, set two lifting points above the vertical tower walls at both ends of the old support beam, namely the first lifting point and the second lifting point, and install chain blocks on both lifting points; Among them, the chain block at the first lifting point is used to drive the horizontal movement of the new and old support beams, and the chain block at the second lifting point is used for load support of the new and old support beams; S2. Open a hole on the tower wall at one end of the old support beam for the access of the new and old support beams; S3. Cooperate two cranes outside the tower. Send one end of the new support beam into the tower through the hole, and then combine with the chain hoist at the first lifting point inside the tower to move the new support beam above the old support beam; S4. Lift the new support beam to a certain height through the chain hoist at the second lifting point. Then use the new support beam as a support and use the chain hoist to support the old support beam. Next, cut the old support beam. After the cutting is completed, install a temporary support on the lower tower wall to temporarily bear the new support beam and assist in positioning the new support beam; S5. Lift the cut old support beam with the chain hoist until the old support beam is at the same horizontal plane as the hole. Then use the chain hoist at the first lifting point and cooperate with the two cranes outside the tower to transfer the old support beam out of the tower through the hole, which is the reverse of the steps in S3.

[0011] S6. When the old support beam is moved out of the tower, at this time, loosen the chain hoist at the second lifting point, lower the new support beam to the installation position and perform break welding and positioning; S7. Remove the temporary support, and then weld and fix the new support beam, that is, complete the replacement work.

[0012] In some examples, in S2, the bottom elevation of the hole needs to be higher than the upper elevation of the old support beam so that the new support beam can be moved above the old support beam.

[0013] In some examples, in S3, when the new support beam is moved and conveyed into the tower, place multiple groups of rollers on the upper surface of the old support beam to roll and convey the new support beam.

[0014] The working principle of the present invention is: For the replacement method of the present invention application, during the implementation process, with the support of the old support beam and rollers, the new support beam can be quickly moved above the old support beam. Then, with the support of the new support beam, the old support beam is horizontally lifted. Under the action of the chain hoist, the old support beam can be quickly moved out of the tower. The entire replacement process is safe and reliable, and the replacement efficiency is high.

[0015] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for replacing a support beam inside a desulfurization tower, including an old support beam installed in the oxidation air duct inside the desulfurization tower, characterized in that, It includes the following steps: S1. First, set two lifting points above the vertical tower walls at both ends of the old support beam, namely the first lifting point and the second lifting point, and install chain hoists on both lifting points; Among them, the chain hoist at the first lifting point is used to drive the horizontal movement of the new and old support beams, and the chain hoist at the second lifting point is used to support the load of the new and old support beams; S2. Open a hole for the entry and exit of the new and old support beams on the tower wall at one end of the old support beam; S3. Two cranes outside the tower cooperate with each other to send one end of the new support beam into the tower through the hole, and then combine with the chain hoist at the first lifting point inside the tower to move the new support beam above the old support beam; S4. Lift the new support beam to a certain height through the chain hoist at the second lifting point, then use the new support beam as a support and use the chain hoist to support the old support beam, and then cut the old support beam. After the cutting is completed, install temporary supports on the lower tower wall to temporarily carry the new support beam and assist in positioning the new support beam; S5. Lift the cut old support beam with the chain hoist until the old support beam is at the same horizontal plane as the hole; then use the chain hoist at the first lifting point and cooperate with the two cranes outside the tower to transfer the old support beam out of the tower through the hole; S6. When the old support beam is moved out of the tower, at this time, loosen the chain hoist at the second lifting point, lower the new support beam to the installation position and perform break welding and positioning; S7. Remove the temporary support, and then weld and fix the new support beam, that is, complete the replacement work.

2. A method for replacing a support beam in a desulfurization tower according to claim 1, characterized in that, In S2, the bottom elevation of the hole needs to be higher than the upper elevation of the old support beam.

3. A method for replacing a support beam in a desulfurization tower according to claim 1, characterized in that, In S3, when the new support beam is moved and transported into the tower, multiple groups of rollers are placed on the upper surface of the old support beam to roll and transport the new support beam.

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