Construction method of coke oven riser, gooseneck pipe and pressure regulating system

Abstract

The application discloses a coke oven upper body pipe, gooseneck pipe and pressure regulating system construction method, and belongs to the technical field of coke oven construction. The construction method comprises the installation of an upper body pipe base, a transition section and a straight pipe section, a water seal and a water seal cover, the installation of a gooseneck pipe group and the installation of an EnviBAT pressure regulating system group. The transition section of the rising pipe and the base are adjusted by an aluminum silicate rope to ensure the accuracy of each coke oven rising pipe. The positioning adjusting device is used at the soft connection part of the gooseneck pipe to protect the sealing property of the soft connection. The gooseneck pipe and the pressure regulating system are integrally hoisted in groups, which solves the interference formed by the dense arrangement of the rising pipe platform and the pipeline instruments in the coke oven area during installation, ensures the effective hoisting and positioning at one time, saves the installation time and greatly improves the efficiency.

Description

Technical Field

[0001] This invention relates to the field of coke oven construction technology, and more specifically, to a construction method for a coke oven riser pipe, gooseneck pipe, and pressure regulation system. Background Technology

[0002] The top of the carbonization chamber in the coke oven roof area is equipped with a riser pipe. The raw coal gas from the carbonization chamber enters the gooseneck pipe through the riser pipe, and then enters the gas collecting pipe through the pressure regulating system. The single-hole carbonization chamber pressure regulating system can prevent emissions caused by high pressure during coal charging and venting through the furnace door and furnace top during the coking process, thereby reducing emissions during the coking process and optimizing the production process. Finally, the gas enters the coal gas purification and treatment system through the gas collecting pipe and the suction pipe.

[0003] During the installation of coke oven riser pipes, gooseneck pipes, and pressure regulation systems, the dense arrangement of riser pipe platforms and piping instruments in the coke oven area interferes with the installation, causing slow progress. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a construction method for coke oven riser pipe, gooseneck pipe and pressure regulation system, so as to improve construction efficiency and installation accuracy.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0006] A construction method for a coke oven riser pipe, gooseneck pipe, and pressure regulating system includes the following steps:

[0007] Step 1: Installation of the riser pipe system;

[0008] The riser pipe system includes a riser pipe base, a riser pipe transition section, and a riser pipe straight section;

[0009] The riser base is arranged on the top of the coke oven. The riser base is located in the riser hole reserved at the top of the carbonization chamber. The bottom of the riser base is fixed to the silica bricks on the top of the oven with bolts. The gap between the riser hole and the riser base is filled with aluminum silicate rope. After completion, refractory mortar is used for grouting.

[0010] The riser pipe transition section is hoisted and connected to the riser pipe base in a socket-type manner. During the installation process, the circumferential gap between the riser pipe transition section and the riser pipe base is adjusted to ensure uniformity in the circumferential direction. After the circumferential gap is tightened with aluminum silicate rope, it is smoothed with refractory mortar. During the installation process, it is kept vertical, concentric and the circumferential gap is uniform.

[0011] Hoist the straight section of the riser pipe and connect it to the transition section of the riser pipe using a flange.

[0012] Step 2: Assemble the gooseneck tube system;

[0013] The gooseneck tube system includes a water seal, a water seal cap, a gooseneck tube, a water seal cap drive cylinder, and a pin.

[0014] The water seal cover drive cylinder is fixed on the frame beam. Then, the pin is passed through the water seal cover and connected to the hook of the water seal cover drive cylinder. The water seal cover is connected to the water seal below it by bolts. The distance and gap between the pin and the hook are adjusted to ensure that the water seal cover can be rotated flexibly. The gooseneck tube is connected to the water seal by bolts. Angle steel brackets are used to temporarily fix the assembled gooseneck tube system.

[0015] Step 3: Assemble the pressure regulation system;

[0016] The pressure regulating system is connected to the gooseneck tube via a flange and a fixing stud;

[0017] Step four: hoist and position the entire unit.

[0018] The assembled gooseneck pipe system and pressure regulation system were hoisted into place as a whole, and the water seal was connected to the straight section of the riser pipe with bolts; the pressure regulation system was located on the support positioning block of the gas collection pipe.

[0019] Furthermore, in step one, a 60mm thick layer of refractory mortar is applied to the inside of the riser base to prevent corrosion from the high-temperature raw coal gas in the carbonization chamber.

[0020] Furthermore, in step two, both the water seal and the inside of the gooseneck tube need to be coated with δ=60mm lightweight refractory castable.

[0021] Furthermore, in step three, a positioning adjustment device is installed on the outer side of the connection surface between the pressure regulating system and the gooseneck tube. The positioning adjustment device includes a flexible connection, a folded sealing ring, and a sealing ring. The upper and lower parts of the flexible connection are respectively connected to the gooseneck tube flange and the gas collecting pipe flange. The folded sealing ring is connected to the gas collecting pipe flange, and the sealing ring is connected to the gooseneck tube flange.

[0022] Furthermore, the flexible connection has an upper flange and a lower flange. The upper flange is pressed by an upper steel washer and connected to the gooseneck flange by bolts. The lower flange is pressed by a lower steel washer and connected to the gas collecting pipe flange by bolts.

[0023] Furthermore, the folded sealing ring is connected to the lower steel washer, and the sealing ring is connected to the upper steel washer.

[0024] Furthermore, the feature is that: in step three, the drive cylinder bracket of the hoisting pressure regulating system is fixed to the external support block of the gooseneck tube by bolts, and then the drive cylinder of the pressure regulating system is fixed to the drive cylinder bracket by bolts.

[0025] Furthermore, in step three, the fixed cup of the pressure regulating system is installed on the conical end of the pressure regulating system through the blind flange end of the gooseneck tube head, and the fixed cup is connected to the hydraulically driven cylinder through a screw.

[0026] Furthermore, in step four, a support positioning block is installed at the flange port of the gas collecting pipe, and a set screw is installed at the gooseneck flange, with the lower section of the set screw pressed against the top surface of the support positioning block.

[0027] Furthermore, in step four, a protective stop is provided on the outer side of the set screw.

[0028] Compared with existing technologies, the construction method for coke oven riser pipe, gooseneck pipe, and pressure regulation system provided by this invention has the following advantages:

[0029] By adopting the method of hoisting the gooseneck pipe and pressure regulation system in pairs, the interference caused by the dense layout of the riser platform and piping instruments in the coke oven area was resolved, ensuring effective hoisting and placement in one go, saving installation time and greatly improving efficiency.

[0030] The circumferential gap between the riser pipe transition section and the riser pipe base is adjusted using aluminum silicate ropes to ensure that the entire row of riser pipes is within a certain error range, providing a favorable guarantee for the next process (the overall hoisting and assembly of the gooseneck pipe and pressure regulation system). Attached Figure Description

[0031] The accompanying drawings, which are provided to further illustrate the invention and form part of this application, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention.

[0032] Figure 1 This is a front view of the construction method of the coke oven riser pipe, gooseneck pipe and pressure regulation system described in this invention;

[0033] Figure 2 yes Figure 1 A magnified detailed schematic diagram of the positioning and adjustment device at point A.

[0034] In the diagram, 1-riser pipe base, 2-upper pipe transition section, 3-riser pipe straight section, 4-water seal, 5-water seal cover, 6-gooseneck pipe, 7-water seal cover drive cylinder, 8-pin, 9-pressure regulating system, 10-air collecting pipe, 11-flexible connection, 12-folded sealing ring, 13-support positioning block, 14-pressure regulating system drive cylinder, 15-fixed cup, 16-sealing ring, 17-set screw, 18-protective stop block, 19-upper steel washer, 20-lower steel washer, 21-fixing stud, 22-drive cylinder bracket, 23-gooseneck pipe flange, 24-air collecting pipe flange. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the present invention will be further described clearly and completely below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0036] This embodiment provides a construction method for a coke oven riser pipe, a gooseneck pipe, and a pressure regulating system, wherein the pressure regulating system is an EnviBAT pressure regulating system.

[0037] First, install the riser system. Use a crane to lift the riser base 1, riser transition section 2, and riser straight section 3 to the leveled coke oven side. Install each component in sequence. Position the riser base 1 at the mounting hole on top of the coke oven carbonization chamber and secure it to the silica bricks on top of the coke oven with bolts. Then, lift the riser transition section 2, adjusting its circumferential gap with the riser base 1. Control the riser transition section 2 for each coke oven within a certain precision range, tighten the circumferential gap with aluminum silicate rope, and then smooth it with refractory mortar. Finally, lift the straight section 3 and secure it to the riser transition section 2 with bolts, ensuring it is vertical and concentric throughout the installation process.

[0038] The next step is to assemble and hoist the gooseneck pipe and pressure regulation system as a whole. The required water seal 4, water seal cover 5, gooseneck pipe 6, pressure regulation system 9 and its accessories are transported to the coke side leveling site, assembled and then hoisted by crane to connect with the straight pipe section 3 and gas collecting pipe 10.

[0039] The following uses a 6.78-meter tamping coke oven as an example to clearly and completely explain the technical solution provided by the present invention.

[0040] Ascent pipe system installation

[0041] like Figure 1 As shown, the riser system includes a riser base 1, a riser transition section 2, and a riser straight section 3, which are arranged on the top of the coke oven, with 65 sets per coke oven.

[0042] The riser base 1 is located on the top of the coke oven. The inside of the riser base 1 is coated with 60mm of refractory mortar to prevent corrosion from the high-temperature raw gas in the carbonization chamber. The riser base 1 is hoisted into the pre-reserved riser hole at the top of the carbonization chamber using a 10t bridge crane in the furnace construction shed. Its bottom is fixed to the silica bricks on the furnace top with bolts. The gap between the hole and the riser base 1 is filled with aluminum silicate rope. After completion, refractory mortar is used for grouting.

[0043] Hoist the riser transition section 2, which is connected to the riser base 1 via a socket joint. During installation, adjust the circumferential gap between the riser transition section 2 and the riser base 1 to ensure uniformity in the circumferential direction. A steel wire centerline is pre-set, and a theodolite is erected to check the verticality, elevation, and concentricity of the riser base 1 and riser transition section 2, ensuring verticality ≤1mm, elevation ≤1mm, and concentricity ≤3mm. After all data for each coke oven meets the requirements, use aluminum silicate rope to tighten the circumferential gap between the riser base 1 and riser transition section 2 to ensure firmness and stability. Fill and smooth with refractory mortar. During operation, maintain verticality, concentricity, and uniform circumferential gap.

[0044] The straight pipe section 3 of the riser pipe was hoisted into place using a 25t bridge crane inside the furnace shed. The straight pipe section 3 of the riser pipe and the transition section 2 of the riser pipe were connected by flanges and bolts. After being in place, the verticality, elevation and concentricity of the straight pipe section 3 were adjusted using a pre-set steel wire centerline and a theodolite to ensure that the installation data requirements were met.

[0045] Gooseneck tube system assembly

[0046] like Figure 1 As shown, the gooseneck tube system includes a water seal 4, a water seal cover 5, a gooseneck tube 6, and accessories such as a water seal cover drive cylinder 7 and a pin 8.

[0047] Select a flat area of ​​900m on the side of the focal plane. 2 Place the gooseneck pipe system and pressure regulation system. Erect the water seal 4 upright in the prefabrication site. A temporary platform is built in part of the prefabrication site using steel plates to ensure the verticality of the water seal 4. Apply δ=60mm lightweight refractory castable to the inside of the water seal 4 and the gooseneck pipe 6.

[0048] A 25t crane was used to lift and position the water seal cover 5 onto the water seal 4. The water seal cover drive cylinder 7 was fixed to the crossbeam of the operating platform frame. The pin 8 was passed through the water seal cover 5 and connected to the hook of the water seal cover drive cylinder 7. The water seal cover 5 was fixed to the lower water seal 4 with bolts. The water seal cover drive cylinder 7 was adjusted to ensure its stroke was within the range of 500±5mm. The distance and clearance of the hook of the pin 8 were adjusted to ensure that the water seal cover 5 could rotate flexibly within the range of 0-95°. The gooseneck tube 6 was assembled with the side flange of the water seal 4 with bolts, ensuring that the lower flange surface of the gooseneck tube 6 was horizontal. Angle steel brackets were used to temporarily fix the assembled gooseneck tube system.

[0049] EnviBAT pressure regulation system assembly

[0050] The pressure regulating system 9 is lifted by a 25t crane, and the installation workers hold it and slowly move it to the already assembled gooseneck tube system. The system is then assembled and installed with the gooseneck tube 6 using flanges, fixing studs 21, and gaskets.

[0051] A positioning adjustment device is installed on the outer side of the connection surface between the pressure regulation system and the gooseneck tube, such as... Figure 2 As shown, the positioning adjustment device includes a flexible connector 11, a folded sealing ring 12, and a sealing ring 16. The upper and lower parts of the flexible connector 11 are respectively connected to the gooseneck flange 23 and the gas collecting pipe flange 24.

[0052] The flexible connector 11 is flipped up and down. The upper flipped edge is pressed by the upper steel washer 19 and connected to the gooseneck flange 23 by bolts. The lower flipped edge is pressed by the lower steel washer 20 and connected to the gas collecting pipe flange 24 by bolts.

[0053] During installation, first use the lower steel washer 20 to press the lower flange of the flexible connection 11 and secure it with bolts. The lower steel washer 20 has a circular ring structure, which serves both as a seal and to reinforce the flexible connection 11. Then, fix the folded sealing ring 12 to the lower steel washer 20. The folded sealing ring 12 is a 2mm thick tapered cylindrical structure, and it is fixed to the lower steel washer 20 by argon arc welding, spot welding it onto the lower steel washer 20, and welding is performed on the outside of the lower sealing ring 20. In the same way, use the upper steel washer 19 to press the upper flange of the flexible connection 11 and secure it with bolts. Then, fix the sealing ring 16 to the upper steel washer 19. The sealing ring 16 is a 2mm thick, 120mm long cylindrical structure, and it is fixed to the upper steel washer 19 by argon arc welding, spot welding it onto the upper steel washer 19, and welding is performed on the outside of the sealing ring 16.

[0054] The positioning adjustment device protects the sealing of the flexible connector 11, ensuring a high first-time installation pass rate. The addition of a folding sealing ring to the outside of the flexible connector ensures its performance in engineering applications and protects it from damage during use.

[0055] Then, the drive cylinder bracket 22 is hoisted by a crane and fixed to the outer support block of the gooseneck tube 6 with bolts. Then, the pressure regulating system drive cylinder 14 is fixed on the bracket 22 with bolts.

[0056] The fixed cup 15 is installed on the conical end of the pressure regulating system 9 through the blind flange end of the gooseneck tube 6. The fixed cup 15 is connected to the pressure regulating system drive cylinder 14 through the screw thread. The screw stroke is adjusted to 350mm to ensure that the fixed cup 15 can move freely up and down. The pressure regulating system drive cylinder 14 is used to adjust the fixed cup 15 to achieve the purpose of regulating the gas pressure inside the gas collecting pipe 10.

[0057] Gooseneck tube and EnviBAT system hoisted into place

[0058] The assembled water seal 4, water seal cover 5, gooseneck tube 6, EnviBAT 9, and other accessories were hoisted into place as a whole using a 260t truck crane.

[0059] Support positioning blocks 13 are installed at the flange port of the gas collecting pipe 10. Each support positioning block 13 is a 30° arc plate with an internal support plate, and four blocks are evenly arranged along the flange of the gas collecting pipe 10 in each group. A set screw 17 is installed at the gooseneck flange 23. The set screw 17 is an M24*205 fully threaded bolt with an external DN25 sleeve, 30mm in length. The flexible connection 11 is adjusted to 275mm using the set screw 17.

[0060] The assembled gooseneck pipe system and pressure regulating system were hoisted into place as a whole using a 260t truck crane. The water seal was connected to the straight section 3 of the riser pipe with bolts. The pressure regulating system was positioned on the support positioning block 13 of the gas collecting pipe 10. The upper set screw 17 of the support positioning block 13 was adjusted to meet the installation accuracy requirements. Then, the side set screw protection block 18 was installed, which serves to protect the set screw 17.

[0061] The scope of protection claimed by this invention is not limited to the specific embodiments described above. For those skilled in the art, this invention can have various modifications and alterations. Any modifications, improvements, and equivalent substitutions made within the concept and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A construction method for a coke oven riser pipe, gooseneck pipe, and pressure regulating system, characterized in that, Includes the following steps: Step 1: Installation of the riser pipe system; The riser pipe system includes a riser pipe base, a riser pipe transition section, and a riser pipe straight section; The riser base is arranged on the top of the coke oven. The riser base is located in the riser hole reserved at the top of the carbonization chamber. The bottom of the riser base is fixed to the silica bricks on the top of the oven with bolts. The gap between the riser hole and the riser base is filled with aluminum silicate rope. After completion, refractory mortar is used for grouting. The riser pipe transition section is hoisted and connected to the riser pipe base in a socket-type manner. During the installation process, the circumferential gap between the riser pipe transition section and the riser pipe base is adjusted to ensure uniformity in the circumferential direction. After the circumferential gap is tightened with aluminum silicate rope, it is smoothed with refractory mortar. During the installation process, it is kept vertical, concentric and the circumferential gap is uniform. Hoist the straight section of the riser pipe and connect it to the transition section of the riser pipe using a flange. Step 2: Assemble the gooseneck tube system; The gooseneck tube system includes a water seal, a water seal cap, a gooseneck tube, a water seal cap drive cylinder, and a pin. The water seal cover drive cylinder is fixed on the frame beam. Then, the pin is passed through the water seal cover and connected to the hook of the water seal cover drive cylinder. The water seal cover is connected to the water seal below it by bolts. The distance and gap between the pin and the hook are adjusted to ensure that the water seal cover can be rotated flexibly. The gooseneck tube is connected to the water seal by bolts. Angle steel brackets are used to temporarily fix the assembled gooseneck tube system. Step 3: Assemble the pressure regulation system; The pressure regulating system is connected to the gooseneck tube via a flange and fixing studs; a positioning adjustment device is provided on the outer side of the connection surface between the pressure regulating system and the gooseneck tube, the positioning adjustment device including a flexible connection, a folding sealing ring and a sealing ring; the upper and lower parts of the flexible connection are respectively connected to the gooseneck tube flange and the gas collecting pipe flange; the folding sealing ring is connected to the gas collecting pipe flange, and the sealing ring is connected to the gooseneck tube flange. The flexible connection has an upper flange and a lower flange. The upper flange is pressed by an upper steel washer and connected to the gooseneck flange by bolts. The lower flange is pressed by a lower steel washer and connected to the gas collecting pipe flange by bolts. Step four: hoist and position the entire unit. The assembled gooseneck pipe system and pressure regulation system were hoisted into place as a whole, and the water seal was connected to the straight section of the riser pipe with bolts; the pressure regulation system was located on the support positioning block of the gas collection pipe.

2. The method according to claim 1, characterized in that: The folded sealing ring is connected to the lower steel washer, and the sealing ring is connected to the upper steel washer.

3. The method according to claim 1 or 2, characterized in that: In step three, the drive cylinder bracket of the hoisting pressure regulating system is fixed to the external support block of the gooseneck tube with bolts, and then the drive cylinder of the pressure regulating system is fixed to the drive cylinder bracket with bolts.

4. The method according to claim 3, characterized in that: In step three, the fixed cup of the pressure regulating system is installed on the conical end of the pressure regulating system through the blind flange end of the gooseneck tube head, and the fixed cup is connected to the hydraulic drive cylinder through a screw.

5. The method according to claim 1 or 4, characterized in that: In step four, install the support positioning block at the flange port of the gas collecting pipe, and install the set screw at the gooseneck flange, with the lower end of the set screw pressed against the top surface of the support positioning block.

6. The method according to claim 5, characterized in that: In step four, a protective stop is provided on the outer side of the set screw.

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