CN109573835B - Layered modularized honeycomb electrode dust and mist remover - Google Patents
Layered modularized honeycomb electrode dust and mist remover Download PDFInfo
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- CN109573835B CN109573835B CN201810610939.8A CN201810610939A CN109573835B CN 109573835 B CN109573835 B CN 109573835B CN 201810610939 A CN201810610939 A CN 201810610939A CN 109573835 B CN109573835 B CN 109573835B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/02—Plant or installations having external electricity supply
- B03C3/16—Plant or installations having external electricity supply wet type
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- Prevention Of Electric Corrosion (AREA)
Abstract
The application discloses a layered modularized honeycomb electrode dust-removing demister, which comprises a cylinder wall, spray pipes, an anode, a cathode and a cone roof, wherein the spray pipes are arranged on the cylinder wall, the spray pipes comprise lower spray pipes and upper spray pipe group modules, the lower spray pipes are arranged on the cylinder wall through lower spray pipe support beam group modules, the lower spray pipe support beam group modules consist of a plurality of mutually matched sub-modules, the anode consists of a plurality of independent anode modules, and the anode modules are arranged on the cylinder wall through middle truss beam group modules and upper support beam group modules; in the lifting process of the wall of the absorption tower, equipment can be subjected to modularized preparation according to a modularized segmentation plan in a ground prefabricated field, and after the lifting of the wall of the straight section of the absorption tower is completed, the modularized lifting work of the honeycomb electrode dust-removing demister can be performed, so that the installation flow is simplified, the installation period is shortened, and the rework rate is reduced.
Description
Technical field:
the application relates to dust removing equipment, in particular to a layered modularized honeycomb electrode dust removing demister.
The background technology is as follows:
in order to meet the ever-increasing pollutant emission standards of thermal power plants, the coal-fired power plants must adopt effective technological methods to reduce the pollutant emission levels. In recent years, the desulfurization wet type electric precipitation demisting technology is increasingly widely applied, and the wet type electric precipitation demister is used as a part of a desulfurization system, so that acid mist which cannot be collected by wet desulfurization can be effectively removed, PM2.5 fine particles can be controlled, and the problems of smoke emission turbidity and the like can be solved.
The working principle of the honeycomb electrode dust and mist remover is that high-voltage corona discharge is utilized to enable dust or water mist charged particles to reach a dust collecting plate under the action of an electric field force, a cyclone device at the lower part of an anode module also enables smoke entering the anode module to rotate, dust and mist drops are thrown onto the dust collecting plate under the action of the centrifugal force, and in a dust removing mode, a wet-type electric dust remover adopts flushing liquid to flush an electrode, and dust captured on the dust collecting plate is flushed into a dust hopper to be discharged.
The honeycomb electrode dust and mist remover device adopts a conductive glass fiber reinforced plastic vertical pipe type wet dust and mist remover which is arranged at the upper end inside the desulfurization absorption tower. Because this kind of wet dedusting defroster structure is complicated, the installation accuracy requirement is higher, and for the transportation convenience, equipment producer supplies with the spare part more, needs the scene equipment, still needs to carry out step-by-step high altitude installation welding construction in the section of thick bamboo wall simultaneously, increases personnel's intensity of labour, extension engineering time.
Chinese patent 201621187591.9 discloses a wet electric precipitator convenient to install, which comprises a top cone of the precipitator, an anode plate group die with cathode wires and a precipitator base, wherein in the design and installation process, the three modules are assembled respectively, and then are abutted by bolts, welding or other fastening modes, so that the installation of the precipitator is completed; the modularized structure has larger overall size, wherein each module of the three modules is assembled by manually gradually assembling corresponding parts in the corresponding shell, when the module is assembled, lifting operation is required to be carried out on each part, then when the three modules are assembled, lifting operation is required to be carried out on each part, and in the process, the parts are lifted for a plurality of times, so that the construction time is prolonged; the anode plate group mould with the cathode wires has more parts, and collision can occur between the cathode wires and the anode plates when the whole hoisting is carried out, so that the efficiency is influenced.
Chinese patent 201610696521.4 discloses integral hoisting of wet electric dust collector body equipment, which is characterized in that the wet electric dust collector body equipment is assembled on the ground, an auxiliary hanging beam is manufactured according to the cuboid structural size of the wet electric dust collector body equipment, the auxiliary hanging beam is connected with the wet electric dust collector body equipment through a steel wire rope, the auxiliary hanging beam is hoisted by using large hoisting equipment, and the wet electric dust collector body equipment is integrally hoisted through the steel wire rope until the wet electric dust collector body equipment is put down at the installation position of the wet electric dust collector body equipment, so that integral hoisting of the wet electric dust collector body equipment is completed; when the wet electric dust collector body equipment is assembled on the ground, the structure and the installation method are the same as those of the wet electric dust collector body equipment directly assembled on the ground, and the corresponding lifting appliance is required to be manufactured, so that the lifting operation is performed once more, and the process is complicated.
The application comprises the following steps:
the technical problems to be solved by the application are as follows: the utility model provides a overcome prior art's not enough, provides an improve at current installation method and mounting structure, at every layer of equipment installation's in-process, according to equipment structural feature, carry out the modularization installation on ground, carry out integral hoisting again after installing into relatively complete structure, reduce the layering modular honeycomb electrode dust removal defroster of the high altitude assembly operation in the tower body.
The technical scheme of the application is as follows: the utility model provides a layering modular honeycomb electrode dust removal defroster, includes section of thick bamboo wall and sets up spray pipe, positive pole, negative pole and the cone top on the section of thick bamboo wall, spray pipe includes lower part spray pipe and upper portion spray pipe group mould, lower part spray pipe is in through lower part spray pipe support beam group mould setting on the section of thick bamboo wall, lower part spray pipe support beam group mould comprises a plurality of submodules that mutually support and use, the positive pole comprises a plurality of independent positive pole modules, its positive pole module passes through middle truss beam group mould and upper portion support beam group mould and sets up on the section of thick bamboo wall, truss beam group mould and upper portion support beam group mould comprise the submodule that a plurality of mutually support used, the negative pole passes through the setting of negative pole frame group mould on the section of thick bamboo wall, negative pole frame group mould comprises a plurality of submodules that mutually support used, upper portion spray pipe group mould comprises a plurality of submodules that mutually support beam group used.
The lower spray pipeline support beam assembly die consists of three sub-dies, wherein the three sub-dies are formed by welding longitudinal beams, transverse beams and short beams in a box beam welding mode in advance, the three sub-dies are in butt joint, fixing and reinforcing through bolts and welding modes to form the lower spray pipeline support beam assembly die, the periphery of the lower spray pipeline support beam assembly die is welded on a wallboard through a wallboard rear seat of the absorber tower and reinforcing the periphery of the seat welding, and the lower spray pipeline with fine holes is arranged on the lower spray pipeline support beam assembly die.
The middle truss girder group die consists of three sub-dies, wherein the three sub-dies are respectively provided with a box girder connected with the lower spray pipeline support girder group die, and are formed by welding longitudinal girders, transverse girders and box girders in advance, the three sub-dies are assembled and connected to form the middle truss girder group die, and the middle truss girder group die is welded with a cylinder wall plate.
The upper support beam group die consists of five sub-dies, wherein the five sub-dies are welded in advance in a welding mode, the five sub-dies are in butt joint, fixing and reinforcing in a welding mode to form the upper support beam group die, and the upper support beam group die is welded with the cylinder wall plate.
The anode module is arranged on an anode module supporting beam formed by a middle truss beam group die and an upper supporting beam group die, and a rubber pad for adjusting flatness is arranged between the anode module and the anode module supporting beam.
The cathode frame group die consists of five sub-dies, wherein the five sub-dies are formed by combining a main beam and a secondary beam in advance in a welding and screwing mode, the main beams are in welding connection, the main beams and the secondary beams are in screw connection through bolts, the five sub-dies are in butt joint, fixing and reinforcing in a welding mode to form the cathode frame group die, the cathode frame group die is arranged on an anode module supporting beam, an I-steel support and a rubber belt pad are arranged between the anode frame group die and the cathode frame group die, and a bending plate for fixing a cathode wire is arranged on the secondary beam.
The upper end of the cathode wire is fixed on the secondary beam through a bolt, and the cathode wire at the lower part of the bolt is fixed on the bending plate through a fire U-shaped bolt.
The upper spraying pipeline group die consists of eight sub-dies, wherein the eight sub-dies are formed by combining PVC spraying pipelines in advance, the eight sub-dies are connected, fixed and reinforced to form the upper spraying pipeline group die, and the upper spraying pipeline group die is arranged on the cone top through an upper spraying support beam.
The cone roof and the internal support are preassembled into a whole, and an insulator insulation box, a top platform, a monorail crane, electrical control equipment and a grounding device are further arranged on the cylinder wall. The spray pipeline is connected with the water pump through a pipeline and a valve, and the water pump and the valve are connected with electrical equipment.
The beneficial effects of the application are as follows:
1. according to the application, in the process of installing each layer of equipment, modular installation is carried out on the ground according to the structural characteristics of the equipment, the whole hoisting is carried out after the equipment is installed into relatively complete modules, and the plurality of modules are connected in the cylinder wall to complete the installation of each layer of equipment, so that the overhead assembly operation in the tower body can be reduced, the safety risk is reduced, the modular assembly of the multi-layer equipment can be simultaneously carried out by utilizing the external space, the construction efficiency is improved, and the installation period is shortened.
2. In the lifting process of the wall of the absorption tower, equipment can be subjected to modularized preparation according to a modularized segmentation plan in a ground prefabricated field, and after the lifting of the wall of the straight section of the absorption tower is completed, the modularized lifting work of the honeycomb electrode dust-removing demister can be performed, so that the installation flow is simplified, the installation period is shortened, and the rework rate is reduced.
3. When the modular pre-assembly is carried out on a pre-fabricated field, the modular pre-assembly device can carry out higher-quality adjustment, correction and corrosion prevention operation on the assembled parts on the ground, and improves the mounting accuracy.
4. According to the application, the scattered parts are pre-assembled into a whole through partial modularized pre-assembly, and the whole hoisting can be completed through one-time hoisting, so that the time waste caused by repeated hoisting of the scattered parts in the past is solved, the hoisting times during installation are reduced, and meanwhile, the modules can be pre-assembled in a hoisting gap again, and the construction time is reduced.
Description of the drawings:
FIG. 1 is a schematic view of the structure of a lower shower pipe support beam assembly mold.
FIG. 2 is a schematic view of an exploded construction of a lower shower pipe support beam assembly mold.
FIG. 3 is a schematic view of the sub-die assembly in a lower spray pipe support beam assembly mold in a seated position.
Fig. 4 is a schematic view of the structure of the lower shower pipe.
Fig. 5 is a schematic view of the structure of the connection of the lower shower pipe and the anode module.
Fig. 6 is a schematic structural view of a middle truss girder group mold.
Fig. 7 is a schematic view showing an exploded structure of the middle truss girder group mold.
FIG. 8 is a schematic view of the structure of the upper support beam assembly mold.
FIG. 9 is a schematic diagram of a six-pass connection of an upper support beam set mold to a middle truss beam set mold.
FIG. 10 is a schematic view of the structure of the upper support beam assembly module and the middle truss beam assembly module connected in two.
FIG. 11 is a schematic view showing an exploded structure of the upper support beam assembly mold.
FIG. 12 is a schematic view of a sub-die lifting pattern in an upper support beam set.
Fig. 13 is an exploded view of the cathode frame assembly mold.
Fig. 14 is a schematic structural view of the bending plate.
Fig. 15 is a schematic view of the structure of the connection of the cathode frame assembly module to the anode module support beam.
Fig. 16 is a schematic exploded view of the upper shower pipe assembly die.
Fig. 17 is a B-B cross-sectional view of fig. 6.
The specific embodiment is as follows:
examples: see fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 and 17. 1-cylinder wall, 2-hexagonal anode tube, 3-hose, 4-flushing water tube, 5-spraying pipeline, 6-anode module, 7-anode module supporting beam, 8-cathode frame, 9-rubber pad, 10-main beam, 11-secondary beam, 12-bolt, 13-U-shaped bolt, 14-bending plate and 15-cathode wire.
The present application and the manner of installing the same are described in detail below with reference to the accompanying drawings.
The utility model provides a layering modular honeycomb electrode dust removal defroster, including the section of thick bamboo wall and set up spray pipe on the section of thick bamboo wall, positive pole, negative pole and cone roof, spray pipe includes lower part spray pipe and upper portion spray pipe group mould, lower part spray pipe is through lower part spray pipe supporting beam group mould setting on the section of thick bamboo wall, lower part spray pipe supporting beam group mould comprises a plurality of submodules that mutually support and use, positive pole comprises a plurality of independent positive pole modules, its positive pole module passes through middle truss beam group mould and upper portion supporting beam group mould setting on the section of thick bamboo wall, truss beam group mould and upper portion supporting beam group mould comprise by a plurality of submodules that mutually support and use, the negative pole passes through cathode frame group mould setting on the section of thick bamboo wall, cathode frame group mould comprises a plurality of submodules that mutually support and use, upper portion spray pipe group mould comprises a plurality of submodules that mutually support and use.
The lower spray pipeline support beam assembly mold consists of three sub-molds, wherein the three sub-molds are formed by welding longitudinal beams, transverse beams and short beams in advance in a box beam welding mode, the three sub-molds are in butt joint, fixing and reinforcing through bolts and welding modes to form the lower spray pipeline support beam assembly mold, the periphery of the lower spray pipeline support beam assembly mold is welded on a wallboard through a wallboard rear seat of the absorption tower and reinforcing the periphery of the seat welding, and a lower spray pipeline with fine holes is arranged on the lower spray pipeline support beam assembly mold.
The middle truss girder group die consists of three sub-dies, the three sub-dies are respectively provided with a box girder connected with the lower spray pipeline support girder group die, and are formed by welding longitudinal girders, transverse girders and box girders in advance, and the three sub-dies are assembled and connected to form the middle truss girder group die which is welded with the cylinder wall plate.
The upper support beam group die consists of five sub-dies, wherein the five sub-dies are welded in advance in a welding mode, and the five sub-dies are butted, fixed and reinforced in a welding mode to form the upper support beam group die which is welded with the cylinder wall plate.
The anode module is arranged on an anode module supporting beam formed by a middle truss beam group die and an upper supporting beam group die, and a rubber pad for adjusting flatness is arranged between the anode module and the anode module supporting beam.
The cathode frame group die consists of five sub-dies, wherein the five sub-dies are formed by combining a main beam and a secondary beam in advance in a welding and screwing mode, the main beams are in welding connection, the main beams and the secondary beams are in screwing connection through bolts, the five sub-dies are in butt joint, fixing and reinforcing in a welding mode to form the cathode frame group die, the cathode frame group die is arranged on an anode module supporting beam, an I-steel support and a rubber belt pad are arranged between the cathode frame group die and the anode module supporting beam, and a bending plate for fixing a cathode wire is arranged on the secondary beam.
The upper end of the cathode wire is fixed on the secondary beam through a bolt, and the cathode wire at the lower part of the bolt is fixed on the bending plate through a fire U-shaped bolt.
The upper spraying pipeline group die consists of eight sub-dies, wherein the eight sub-dies are formed by combining PVC spraying pipelines in advance, the eight sub-dies are connected, fixed and reinforced to form the upper spraying pipeline group die, and the upper spraying pipeline group die is arranged on the cone top through an upper spraying support beam.
The cone roof and the internal support are preassembled into a whole, wherein an insulator insulation box, a top platform, a monorail crane, electrical control equipment and a grounding device are further arranged on the cylinder wall. The spray pipeline is connected with the water pump through a pipeline and a valve, and the water pump and the valve are connected with electrical equipment.
Preparation before assembly construction:
preparing personnel according to a construction plan, and preparing field tools, fields and construction platforms; particularly, the layout of the sites required by the modular assembly of each layer is planned reasonably in advance, the places and channels for storing, transporting and hoisting the assembled modules are planned, and important factors such as the layout of the force energy of the combined sites and the hoisting areas of the absorption towers are planned.
Jacking operation of the wall of the absorption tower: in the jacking process of the wall of the absorption tower, equipment can be subjected to modularized preparation (three sub-molds of a lower spray pipeline support beam group mold, three sub-molds of a middle truss beam group mold, five sub-molds of an upper support beam group mold, five sub-molds of a cathode frame group mold, eight sub-molds of an upper spray pipeline group mold and a cone top) according to a modularized segmentation plan in a ground prefabricated field, and after the jacking of the wall of the straight section of the absorption tower is completed, the modularized hoisting work of the honeycomb electrode dust removal demister can be performed.
The lower spray pipeline support beam group die is installed: the lower spray pipeline support beam group mould has a frame structure formed by box-shaped beams (as shown in figure 1), and the lower spray pipeline support beam group mould is formed by 6 longitudinal beams, 19 transverse beams and 6 short beams in total. The frame is welded by box beam, and the frame is welded to the absorption tower by passing through the back seat of the wall plate of the absorption tower and reinforcing the periphery of the seat. Wherein, from left to right, the 2 nd and 5 th two beams are longitudinal through beams, and other longitudinal beams are disconnected and welded with transverse beams.
The floor beam is disassembled and assembled into A, B, C sub-modules, and the concrete disassembly mode is shown in figure 2.
The lifting sequence is A, C, B, and holes on the wall plate of the absorption tower can be properly opened for the convenience of lifting. After A, C is in place, the A, C two beams can be moved to the left and right sides to the maximum extent, and a distance of 10cm is reserved for hoisting the module B.
Because the front-back length of the module C is greater than the size of the absorption tower, the hoisting of the module C is required to be obliquely hoisted back and forth, and the hoisting space requirement can be met by calculating the inclination angle to be about 10 degrees. After the low end side enters the reserved hole, the low end side is allowed to enter the reserved hole to the maximum extent, and the high end side is allowed to fall down to the through position. The module B is then translated towards the high end side so as to penetrate the preformed hole. And finally, the translation module A, C is closed to the mounting position towards the module B, and the three modules A, B, C are butted, fixed and reinforced. The specific form of the positioning is shown in fig. 3.
The lower spraying pipeline registers: and before the upper layer supporting beam is hoisted, the registering work of the lower spraying pipeline is completed. The lower spray pipeline is formed by longitudinally arranging 17 high-strength PVC pipelines (shown in figure 4), a plurality of tiny holes are formed in each PVC pipeline, and after the anode module is installed, a branch pipe is led out from each small hole and is connected to the lower end of each honeycomb as shown in figure 5.
And (3) installing a middle truss girder group die: the middle truss girder group mould structure is shown in figure 6, and 14 box girders with the length of 2.99m are connected between the girder of the layer and the lower spray pipeline support girder group mould of the lower layer.
The layer beam and 14 connecting upright posts are used as the same layer for hoisting, and the splitting mode shown in fig. 7 is divided into A, B, C sub-modules.
And after the A, B, C sub-die assembly is completed on the ground and the inspection and acceptance are qualified, starting the sub-die to hoist. The hoisting sequence is B, A, C.
The lifting step of the module B is the same as that of the module B in the lower spray pipeline support beam group mould. The hoisting inclination of the module B should be not less than 11 °.
After the module B is hoisted in place, the 24 upright posts at the lower part can be connected with the lower layer beam by spot welding and the absorption tower wallboard by spot welding, and after the integral adjustment is finished, the welding construction is finished.
The module A, C is composed of 6 transverse beams, one end of each transverse beam is connected with the wall plate of the absorption tower, and the other end of each transverse beam is connected with the longitudinal beam of the module B. A. The 12 beams are registered firstly in the installation of the C module, and then are installed in a penetrating way and welded one by one.
And (3) mounting an upper support beam group die: the upper support beam assembly is constructed as shown in FIG. 8, and the layer of support beam structure is identical to the lower spray pipe support beam structure in that it has 6 channels of I-I type (shown in cross section of FIG. I-I) and 2 channels of II-II type (shown in cross section of FIG. II-II) with the middle truss beam of the anode module. In order to reduce the amount of construction of high-level welding operations such as overhead welding and overhead welding in the tower, the upper support beam assembly mold is disassembled as shown in fig. 8, 9 and 10, and is decomposed into A, B, C, D, E five sub-molds as shown in fig. 11.
The longitudinal section of module B, D is shown in section II-II and the longitudinal section of module C is shown in section I-I.
And after the splicing of the sub-mould is completed on the ground and the inspection and acceptance are qualified, hoisting the sub-mould is started. The hoisting sequence is B, D, C, A, E.
The module B, D is suspended horizontally by double ropes, and the tower-entering position is accessed from a side parallel to the installation position and close to the center of the tower (the position a is the access position in fig. 10). When the elevation position of the reserved hole is reached, the module is translated to the side of the reserved hole, so that the module enters the installation position, and the concrete hoisting mode is shown in fig. 12.
To facilitate the next step of lifting the module C, the module B, D should continue to translate sideways to the storage position (position C in fig. 10) after entering the installation position (position b in fig. 10). The module B, D is then temporarily secured.
The lifting step of the module C is the same as that of the module B in the lower spray pipeline support beam group module. The hoisting inclination of the module C should be not less than 11 °. After module C reaches the installed position, module B, D is translated to the installed position and welded to module C. And the lower part of the module B, C, D is vertically supported on a layer of truss girder below the module B, C, D to be welded and fixed.
Finally, the module A, E is lifted, and the module A, E is in a semi-arc structure, so that the module can be positioned by slightly inclining the module. After the girder is in place, the girder can be welded and fixed with the module B, D, so that the A, B, C, D, E five modules are combined into a whole and welded with the lower truss girder and the absorber wall plate. So far, the whole installation of the support beam at the lower part of the anode module is completed.
The lower spray pipe support beam assembly, the middle truss beam assembly and the upper support beam assembly are required to be preserved prior to hoisting the anode modules. Before the corrosion prevention construction, the levelness, the verticality and the size of an anode module supporting beam formed by the middle truss beam group die and the upper supporting beam group die are required to be checked and accepted, and the welding part in the absorption tower is required to be subjected to ultrasonic detection.
Mounting of anode modules: before the anode module is hoisted, a rubber pad is required to be installed on the upper support beam group die. Before the rubber pad is installed, a little silica gel is coated on the girder to prevent the rubber pad from sliding, and the flatness of the upper part of the girder is adjusted by the rubber pad, so that the error is not more than 5mm.
And hoisting the anode module after the adjustment is completed. The total of the engineering anode modules is 48, the standard size is 2.1 x 2.4m x 4.6m, the maximum weight of the standard blocks is 2.9t, the anode modules are horizontally placed when entering the field, and the field needs to be vertically lifted. And when in hoisting, the special hoisting tool is used for hoisting the module, and a 40t tower crane is used for hoisting the top of the module, and a 25t automobile crane is used for auxiliary matching. When the special tool is worn, 4 holes are reserved at the lower part of the module, the cyclone device is not installed temporarily, and the cyclone device is installed after the special tool is in place.
The anode module can be hoisted only once, and the next hoisting can be continued after the previous hoisting is completed. When the anode module is hoisted into the anode module support beam frame, special persons are arranged to support, so that the anode module is prevented from colliding with the support beam in the hoisting process, and the anti-corrosion layer is prevented from being damaged.
In the hoisting process, the positions of the modules are timely adjusted, the distance between two adjacent modules reaches 20mm, and the transverse and longitudinal height difference above the modules is measured by adopting a horizontal pipe, so that the perpendicularity of the modules is ensured to be not more than 5mm.
Hoisting a cathode frame group die: the structure of the cathode hanging main beam and the secondary beam is shown in fig. 13, wherein the thick line part is the cathode main beam, the thin line part is the cathode secondary beam, and the main beam are welded for convenient adjustment and are connected by bolts. The cathode primary and secondary beams are suspended above the anode module by 24 suspension points, and the cathode suspension beams of the layer are naturally divided into A, B, C, D, E sub-modules by 24 suspension points.
The cathode line is hung on the cathode secondary beam, and the working efficiency of the wet dust-removing demister is directly determined by the installation accuracy of the cathode beam. Therefore, in the process of assembling the cathode frame beam on the ground, the assembly precision is paid attention to, and the inspection is strictly carried out according to the precision requirement.
The cathode hoisting girder is divided into 5 frames, and after welding between the girders is completed, the girder frames are subjected to supervision and qualified acceptance by owners, and then the next work can be carried out.
The 5 frame beams of the layer have no strict lifting sequence, and can be sequentially lifted according to the site situation or the acceptance sequence. After the cathode frame beams are in place, fine adjustments to the secondary beam positions are required to achieve optimal bonding of the cathode wire suspension point positions to the anode "honeycomb cylinders". And after the adjustment, the bolts and nuts are fixed by argon arc welding spot welding to prevent the cap slipping wire from being removed later in operation, and then all the cathode secondary beams are provided with bending plates, as shown in fig. 14.
Because the length of the cathode line is about 3.6 m, and the distance from the upper surface of the anode module to the lower edge of the cone is about 2m, the installation space of the cathode line is insufficient, and the cathode frame and the cathode line are pre-stored before the cone top is installed.
Before the cathode frame is hoisted, small buttresses are made of I-shaped steel and placed at specified positions on the anode module girder, rubber is padded at the bottoms of the buttresses to prevent the modules from being damaged, and the cathode frame is stored on the buttresses, as shown in fig. 15.
2-table 5t chain block leveling is adopted when the cathode frame is hoisted, so that hoisting deformation is prevented. When the absorber is hung in, personnel are arranged to support, so that the absorber is prevented from being collided with the inner wall of the absorber, and the anti-corrosion layer is prevented from being damaged.
Cathode wire installation: the cathode wires are installed one by 2 persons, the upper ends of the cathode wires are fixed through bolts, and the lower 20 cm of the bolts are fixed through U-shaped bolts by bending plates fixed on the cathode secondary beams, as shown in fig. 14. During the installation process, the collision of the cathode wires is prevented, and the barbed holes are damaged. The cathode ray is temporarily not commissioned because the upper water pipe support beam has not been installed. During the installation process, the impurities are not required to fall into the anode tube.
And (3) installing an upper spray pipeline group die: the upper spray pipeline group die should be pre-stored in a modularized way before hanging and installing after the pre-storing of the cathode frame beam group die is finished. Because there is no obstruction of the upper part of the absorber tower and other beams of the device during the period, the modular installation can be realized. In addition, the upper spray pipeline is made of PVC material, has lighter weight and can be directly and temporarily placed on the cathode frame beam group die.
The upper spray pipeline group die layout is shown in fig. 16, and is divided into A, B, C, D, E, F, G, H sub-modules, and after the modules are combined on the ground, the modules are pre-stored on the cathode frame beam group die according to the positions of the modules in the absorption tower. And after the cathode frame beam is hung and installed in place and the upper spray pipeline supporting beam and the support hanger are installed, the upper spray pipeline is installed in place.
Conical top installation of the absorption tower: before the cone roof of the absorption tower is assembled back, a scaffold is required to be erected above the anode module, and a frame plate is required to be placed at the position where the scaffold is erected before the scaffold is erected, so that the acting point of the scaffold is arranged on the frame plate, and then pressure is diffused through the frame plate, thereby achieving the aim of safety.
The third layer of the cone roof is cut into 6 pieces in the disassembling process, and the third layer of the arc plate is subjected to arc machining again on the ground so as to reduce the deformation, and the third layer of the cone roof is preassembled, so that the work of sand blasting and priming paint brushing by an anti-corrosion unit is facilitated.
The cone installation and welding processes pay attention to the protection of the anode module, the cathode wire and the anti-corrosion finished product, and a welder uses a fire receiving basin in the welding process and arranges special persons to carry fire-fighting equipment for monitoring. Each welding worker has special monitoring.
The inner support of the cone roof is installed, and a 25t tower crane is used for penetrating into the cone body from the support hole of the support beam of the cone roof.
Upper spray support beam and pipe support mounting: the upper spray support beam must be completed after the cone of the absorber is reinstalled, so the upper support beam cannot use a modular hoisting method. The support beam material is pre-stored in the tower body in advance before the vertebral body is reinstalled, so that the labor and mechanical waste caused by the perforation and installation of the vertebral body are avoided, and the installation efficiency is improved.
Top platform steel frame installation: the cone top and the upper spray support beam of the absorption tower are corrosion-proof; the sand blasting grade Sa2.5 of all components of non-stainless steel materials in the cylinder; the surface of the top cover is coated with glass flakes of 4mm, and the joint of the steel beam and the top cover is coated with glass flakes of 2mm and FRP of +2 mm.
And (3) installing a hot air purging system: the hot air purging system consists of a sealing fan, a heater and a pipeline system. And a hot air blowing fan, a motor and a pipeline are arranged, so that firm welding and airtight performance are ensured. Cleaning of the pipeline is noted in the installation process, and sundries are prevented from being remained in the pipeline.
And (3) cathode hanging and installing: because the suspender is a common carbon steel piece, corrosion protection is required to be carried out on the ground before installation. And the hoisting belt is adopted for binding during hoisting, so that the damage to the anti-corrosion layer is avoided.
Before installation, the insulator is carefully checked for defects such as cracks, knocking and pressing pry are strictly forbidden during installation, sealing filler is timely installed after the installation is finished, the center line of the insulator and the center line of the suspender are coincident, and the deviation of the two centers is not more than 10mm.
Binding a housing in the sundries of the cathode and anode system with a cathode hanging bottom support, and then integrally hanging the cathode hanging.
And (3) spraying sand on a medium carbon steel part boom and a welding seam of carbon steel and stainless steel by using a cathode hanger to obtain the grade Sa2.5, brushing glass flakes with the thickness of 2mm and FRP with the thickness of 2mm, and checking to be qualified.
Insulator insulation can installation: after the cathode system is installed, the cathode system is covered by an insulation box, and is welded with the top beam and the top flue plate at the corresponding position, so that the tightness of the insulation box must be ensured, and the air leakage phenomenon cannot occur.
And (3) electric equipment installation: the high-voltage isolating switch is installed according to the technical requirement, and the equipment is installed firmly and reliably and is flexible to operate. The stroke meets the requirement, the distribution is accurate and in place, and the contact is good. After the isolating switch is installed, neutral vaseline oil should be smeared on the dynamic and static contacts, and a proper amount of lubricating oil should be added on the mechanical transmission part.
And (3) installing a grounding device: all metal parts which can be electrified accidentally on the shell, the anode tube, the platform, the high-voltage rectifying transformer shell, the operating panel shell, the manhole door and other equipment are reliably connected with the grounding grid. The materials and specifications of the grounding device are selected according to the design requirements. All the grounding wires should be welded well, and the bolts are fastened, firm and reliable and cannot be loosened. The electric control room ground screen, the transformer and the control cabinet should be reliably connected with the ground screen.
And (3) installing a spraying system and a water supply system: before installation, the water pump, various valves, pipelines and instrument devices must be checked. The water pump is confirmed to be flexible and reliable, and no jamming phenomenon exists; the valve should rotate flexibly; the instrument is intact, sensitive and reliable.
After the top spraying system and the water supply system pipeline are integrally installed, the main pipe and the branch pipe are washed and subjected to a hydraulic test, the filter screen is cleaned, and after the cleaning, an upper spraying nozzle is installed, and the lower spraying pipeline is connected with the anode module washing water hose.
The installation of the part spray nozzle requires a vertical downward deviation of + -2 deg.. All internal spray pipelines need to have a safe distance of not less than 200 mm with the cathode suspender, the cathode main beam and the cathode secondary beam, so that electric field discharge to the grounded pipelines is prevented, and the boosting effect is prevented from being influenced.
The other parts are the same as those in the existing honeycomb electrode dust and mist remover, and the installation method and the use method of the honeycomb electrode dust and mist remover are all carried out according to the prior art.
The above description is only of the preferred embodiments of the present application, and is not intended to limit the present application in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical principles of the present application still fall within the scope of the technical solutions of the present application.
Claims (8)
1. The utility model provides a layering modular honeycomb electrode dust removal defroster, includes section of thick bamboo wall and sets up spray pipe, positive pole, negative pole and the cone top on the section of thick bamboo wall, characterized by: the spray pipeline comprises a lower spray pipeline and an upper spray pipeline group die, the lower spray pipeline is arranged on the cylinder wall through a lower spray pipeline support beam group die, the lower spray pipeline support beam group die consists of a plurality of mutually matched sub-dies, the anode consists of a plurality of independent anode modules, the anode modules are arranged on the cylinder wall through a middle truss beam group die and an upper support beam group die, the truss beam group die and the upper support beam group die are respectively formed by a plurality of mutually matched sub-dies, the cathode is arranged on the cylinder wall through a cathode frame group die, the cathode frame group die consists of a plurality of mutually matched sub-dies, and the upper spray pipeline group die consists of a plurality of mutually matched sub-dies;
the lower spray pipeline support beam assembly mold consists of three sub-molds, wherein the three sub-molds are formed by welding longitudinal beams, transverse beams and short beams in advance in a box beam welding mode, the three sub-molds are in butt joint, fixing and reinforcing in a bolt and welding mode to form the lower spray pipeline support beam assembly mold, the periphery of the lower spray pipeline support beam assembly mold is connected with an absorption tower in a mode of penetrating through a wallboard rear seat of the absorption tower to be welded on the wallboard and reinforcing the periphery of the seat welding, and a lower spray pipeline with tiny holes is arranged on the lower spray pipeline support beam assembly mold;
the cathode frame group die consists of five sub-dies, wherein the five sub-dies are formed by combining a main beam and a secondary beam in advance in a welding and screwing mode, the main beams are in welding connection, the main beams and the secondary beams are in screw connection through bolts, the five sub-dies are in butt joint, fixing and reinforcing in a welding mode to form the cathode frame group die, the cathode frame group die is arranged on an anode module supporting beam, an I-steel support and a rubber belt pad are arranged between the anode frame group die and the cathode frame group die, and a bending plate for fixing a cathode wire is arranged on the secondary beam.
2. The layered modular cellular electrode dust and mist eliminator as set forth in claim 1, wherein: the middle truss girder group die consists of three sub-dies, wherein the three sub-dies are respectively provided with a box girder connected with the lower spray pipeline support girder group die, and are formed by welding longitudinal girders, transverse girders and box girders in advance, the three sub-dies are assembled and connected to form the middle truss girder group die, and the middle truss girder group die is welded with a cylinder wall plate.
3. The layered modular cellular electrode dust and mist eliminator as set forth in claim 1, wherein: the upper support beam group die consists of five sub-dies, wherein the five sub-dies are welded in advance in a welding mode, the five sub-dies are in butt joint, fixing and reinforcing in a welding mode to form the upper support beam group die, and the upper support beam group die is welded with the cylinder wall plate.
4. The layered modular cellular electrode dust and mist eliminator as set forth in claim 1, wherein: the anode module is arranged on an anode module supporting beam formed by a middle truss beam group die and an upper supporting beam group die, and a rubber pad for adjusting flatness is arranged between the anode module and the anode module supporting beam.
5. The layered modular cellular electrode dust and mist eliminator as set forth in claim 1, wherein: the upper end of the cathode wire is fixed on the secondary beam through a bolt, and the cathode wire at the lower part of the bolt is fixed on the bending plate through a fire U-shaped bolt.
6. The layered modular cellular electrode dust and mist eliminator as set forth in claim 1, wherein: the upper spraying pipeline group die consists of eight sub-dies, wherein the eight sub-dies are formed by combining PVC spraying pipelines in advance, the eight sub-dies are connected, fixed and reinforced to form the upper spraying pipeline group die, and the upper spraying pipeline group die is arranged on the cone top through an upper spraying support beam.
7. The layered modular cellular electrode dust and mist eliminator as set forth in claim 1, wherein: the cone roof and the internal support are preassembled into a whole, and an insulator insulation box, a top platform, a monorail crane, electrical control equipment and a grounding device are further arranged on the cylinder wall.
8. The layered modular cellular electrode dust and mist eliminator as set forth in claim 1, wherein: the spray pipeline is connected with the water pump through a pipeline and a valve, and the water pump and the valve are connected with electrical equipment.
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