Center adjusting and tensioning system for cathode line of thermal power wet electric dust collector and mounting and adjusting method of center adjusting and tensioning system

Abstract

The invention discloses a center adjusting and tensioning system for a cathode wire of a thermal power wet electric precipitator and a mounting and adjusting method, and relates to the technical field of thermal power wet electric precipitations.The center adjusting and tensioning system comprises the cathode wire, an anode plate, a center adjusting fixing device hoisted on the upper portion of the cathode wire and a center adjusting and tensioning device installed on the lower portion of the cathode wire. The center positioning device is used for adjusting the cathode wire to the center position of the anode plate; the self-aligning fixing device comprises an upper supporting beam, a self-aligning sliding support, a hoisting support and a positioning block. The self-aligning tensioning device comprises a lower supporting beam, a self-aligning sliding support, a hoisting support, a positioning block and a compression spring. And the center positioning device is used for ensuring that the cathode wire is positioned in the center of the anode plate when the cathode wire is mounted or adjusted. The problems of center adjustment and tensioning after expansion of the cathode wire can be solved, safe and stable operation of ultralow emission equipment is ensured, the commissioning rate is increased, and fault shutdown and environmental pollution events are completely eradicated.

Description

Technical Field

[0001] The present invention relates to the technical field of wet electrostatic precipitators for thermal power plants, and specifically to a cathode wire centering and tensioning system and an installation and adjustment method for a wet electrostatic precipitator in a thermal power plant. Background Technique

[0002] To meet the requirements of ultra-low emissions for environmental protection, all thermal power plants are designed to use wet electrostatic precipitator equipment. The cathode wires of the installed wet electrostatic precipitator equipment only have the function of one-way adjustment of 50 mm, and 30 mm sliding holes are provided at both fixed positions and fixed with bolts.

[0003] Currently, during the installation process of anode plates and cathode wire equipment, there are problems of deviation from the center error and inability to adjust unidirectionally within the design error range. And during operation, due to temperature changes and discharge sparks, the cathode wires are prone to expansion and bending that cannot be eliminated, resulting in a decrease in the distance between the cathode wires and the anode plates or direct contact, thereby causing the failure of the electric field boost or the tripping of the transformer after a short circuit, resulting in environmental protection accidents where the dust removal emissions exceed the standard. Summary of the Invention

[0004] The technical task of the present invention is to address the above deficiencies and provide a cathode wire centering and tensioning system and an installation and adjustment method for a wet electrostatic precipitator in a thermal power plant, which can solve the problems of centering and tensioning of the cathode wires after expansion, ensure the safe and stable operation of ultra-low emission equipment, improve the commissioning rate, and prevent failure shutdowns and environmental pollution incidents.

[0005] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0006] A cathode wire centering and tensioning system for a wet electrostatic precipitator in a thermal power plant includes: cathode wires, anode plates, a centering and fixing device hoisted on the upper part of the cathode wires, a centering and tensioning device installed on the lower part of the cathode wires, and a center positioning device for adjusting the cathode wires to the center position of the anode plates;

[0007] The centering and fixing device includes an upper support beam, a centering sliding bracket, a hoisting bracket, and a positioning block. The centering sliding bracket includes a vertically connected plate and a horizontally connected plate that are fixedly connected to each other. The centering sliding bracket is horizontally slidably and adjustably fixed to the upper support beam through the vertically connected plate; one end of the hoisting bracket is fixedly connected to the top of the cathode wire, and the other end of the hoisting bracket is longitudinally slidably and adjustably fixed to the horizontally connected plate through bolts and is limited and fixed by the positioning block to form a horizontal cross adjustment in the upper part; the center positioning device is used to adjust the upper part of the cathode wires to the center position of the anode plates;

[0008] The centering and tensioning device includes a lower support beam, a centering sliding bracket, a lifting bracket, a positioning block and a compression spring. The centering sliding bracket includes a horizontally connected plate and a vertically connected plate which are fixedly connected to each other. The centering sliding bracket is horizontally slidably and adjustably fixed to the lower support beam through the vertically connected plate. One end of the lifting bracket is fixedly connected to the bottom of the cathode wire, and the other end of the lifting bracket is longitudinally slidably and adjustably fixed to the horizontally connected plate through an adjusting bolt and is limited and fixed by a positioning block to form a horizontal cross adjustment at the lower part. The adjusting bolt is installed with a compression spring to realize the tension adjustment of the cathode wire. Use a center positioning device to adjust the lower part of the cathode wire to the center position of the anode plate;

[0009] The center positioning device is used to ensure that the cathode wire is located at the center of the anode plate when the cathode wire is installed or adjusted. The center positioning device includes two symmetrically arranged positioning components which are detachably connected. A positioning clamping seat is arranged at the edge of the positioning component, and the positioning clamping seat is used for the limit fit of the center positioning device and the anode plate. After the two positioning components are assembled, a cathode wire limiting hole is provided at their center position. When the positioning clamping seat is completely buckled with the anode plate, the center line of the cathode wire limiting hole coincides with the center line of the anode plate.

[0010] The upper centering and fixing device of the system forms an upper horizontal cross adjustment. By using the center fixing device, the upper part of the cathode wire can be adjusted to the center position of the anode plate; the lower centering and tensioning device forms a lower horizontal cross adjustment. By using the center fixing device for positioning, the lower part of the cathode wire can be adjusted to the center position of the anode plate; the adjusting bolt compresses the spring to cause the cathode wire to be tensioned, and the expansion amount of the cathode wire temperature change during operation can be tightened and straightened through the spring force. Thus, the problems of centering the cathode wire and tensioning the cathode wire after expansion are solved, ensuring the safe and stable operation of the ultra-low emission equipment.

[0011] Further, the centering sliding bracket,

[0012] The vertically connected plate is provided with a horizontally arranged adjusting long hole, and the centering sliding bracket is horizontally slidably and adjustably fixed to the upper / lower support beam through the horizontally arranged adjusting long hole;

[0013] The horizontally connected plate is provided with a longitudinally arranged adjusting long hole, and the lifting bracket is installed on the adjusting long hole of the horizontally connected plate through a bolt and is limited and fixed by a positioning block;

[0014] A reinforcing rib plate is arranged at the connection part of the vertically connected plate and the horizontally connected plate.

[0015] Further, a roughened anti-slip surface is arranged at the connection part of the vertically connected plate, and a roughened anti-slip gasket is installed at the bolt connection part;

[0016] The horizontal surface at the adjustment long hole of the horizontal connecting plate is provided with a serrated anti-slip structure; the bottom surface of the positioning block is a serrated structure, and the positioning block has a bolt through hole at the center. The positioning block is installed on the horizontal connecting plate through the bolt, and the positioning and anti-slip are realized by the cooperation of the serrated structure on its bottom surface and the serrated anti-slip structure of the horizontal connecting plate.

[0017] Further, two horizontal adjustment long holes are vertically and arrayedly opened on the vertical connecting plate, and two bolts are respectively fixed at opposite ends of the two adjustment long holes.

[0018] Further, the hoisting bracket includes a horizontal fixing plate for connecting the centering sliding bracket and two vertical connecting side plates symmetrically arranged on both sides of the horizontal fixing plate. Both ends of the cathode wire have connecting holes. Bolt holes are opened on the two vertical connecting side plates. During installation, the cathode wire is located between the two vertical connecting side plates, and two side pads are installed. The connection and fixation between the hoisting bracket and the cathode wire are realized by bolt connection and fastening;

[0019] The bolt connection between the hoisting bracket and the centering sliding bracket is adjusted and fixed by using double nuts.

[0020] Further, both the upper support beam and the lower support beam are T-shaped stainless steel support frames provided with horizontal adjustment long holes.

[0021] Further, the anode plate is a hexagonal hollow anode plate; the two symmetrically arranged positioning components are assembled into a hexagon and have six positioning chucks; when the positioning chucks at the six edges are all buckled into the anode plate, the center line of the cathode wire limiting hole coincides with the center line of the anode plate.

[0022] Further, the centering fixing device, the centering tensioning device and the center positioning device are all made of 2205 stainless steel. The commissioning rate and dust removal efficiency of the wet electrostatic precipitator are improved, and the failure rate and environmental protection pollution risk are reduced.

[0023] The present invention also claims to protect an installation and adjustment method for the centering and tensioning system of the cathode wire of a thermal power wet electrostatic precipitator. For the above-mentioned centering and tensioning system of the cathode wire of the thermal power wet electrostatic precipitator, the installation process is as follows:

[0024] Fix the upper support beam to the internal cathode hoisting beam, and its vertical plane is located at the horizontal center line position of a row of hexagonal hollow anode plates, with an error less than 10 mm. During the assembly process of different anode plate modules, individual errors caused by construction, materials, position, etc. may be: 10 mm ≤ deviation from the center ≤ 50 mm;

[0025] Install the centering and fixing device: Install the centering sliding bracket on the upper support beam; Connect the lower part of the hoisting bracket (including the cushion block) to the upper hole of the cathode wire through bolts and tighten them. Connect the upper part of the hoisting bracket to the centering sliding bracket through bolts, install the positioning block, adjust and fix it with nuts, and make the serrated teeth of the positioning block mesh with the serrated teeth of the centering sliding bracket;

[0026] Fix the lower support beam to the bottom cathode frame. Its vertical plane is located at the center line position of the lower horizontal plane of a row of six-sided hollow anode plates, with an error less than 10 mm. During the assembly of different anode plate modules, individual errors caused by construction, materials, position, etc. may be: 10 mm ≤ deviation from the center ≤ 50 mm;

[0027] Install the centering and tensioning device: Install the centering sliding bracket on the lower support beam; Connect the upper part of the hoisting bracket (including the cushion block) to the lower hole of the cathode wire through bolts and tighten them. Connect the lower part of the hoisting bracket to the centering sliding bracket through bolts, install the positioning block and the compression spring, adjust and fix it with nuts, and make the serrated teeth of the positioning block mesh with the serrated teeth of the centering sliding bracket.

[0028] Furthermore, the cathode wire center adjustment process is as follows:

[0029] Use two sets of center positioning devices to connect and fix the positioning components from the upper and lower parts of the cathode wire respectively with bolts, and put the cathode wire into the cathode wire limiting hole in the middle;

[0030] Loosen the nuts of bolt A and bolt B at the connection between the upper support beam and the upper centering sliding bracket, slide the centering sliding bracket, and try to make the center line of the adjustment elongated hole of its horizontal connecting plate coincide with the center line in the same direction of the anode plate horizontal plane (adjustable distance 100 mm), and tighten the nuts of bolt A and bolt B; Loosen the double nuts C of the bolts at the connection between the upper centering sliding bracket and the hoisting bracket, slide the hoisting bracket, bolts and positioning block; Make the cathode wire center close to the anode plate horizontal center (adjustable distance 100 mm). When all the positioning chucks of the two sets of center positioning devices just fit into the 6 sides of the anode plate horizontal plane, the error between the cathode wire center and the anode plate horizontal center is less than 10 mm; Then finely adjust according to the position of the center hole of the center positioning device to make the cathode wire center coincide with the anode plate horizontal center. Tighten the double nuts C of the centering and fixing device at the upper part, and adjust the double nuts of the centering and tensioning device at the lower part to compress the compression spring by 300 N to tension the cathode wire, which can eliminate the expansion elongation and deformation stress during expansion at the middle position of the cathode wire under the operating temperature.

[0031] Compared with the prior art, a cathode wire centering and tensioning system and installation and adjustment method for a thermal power wet electrostatic precipitator of the present invention have the following beneficial effects:

[0032] The adjustment center of the present invention is convenient, firmly fixed, and does not produce sliding and position change during operation; the expansion amount is compensated and offset by the spring, which tightens the cathode wire and prevents the situation of changing the electrode spacing and discharging after bending and deformation. This adjustment can be used for the adjustment and installation of the cathode wires of the entire wet electrostatic precipitator; it can also be used for the overhaul and defect elimination of the electric field with serious eccentricity, bending and deformation of the cathode wires in the existing wet electrostatic precipitator, low voltage, and frequent discharging. It eliminates the defects of short-circuit fire and transformer tripping caused by the eccentricity and bending of the cathode wires, changing the electrode spacing or lapping the anode plate, improves the commissioning rate of the wet electrostatic precipitator, and prevents the occurrence of fault shutdowns and environmental pollution incidents.

[0033] The novel structure of the present invention is reasonable, low in cost, easy to install, convenient to adjust, obvious in effect, and easy to popularize and use. Brief Description of the Drawings

[0034] Figure 1 It is a structural diagram of the assembly of the hoisting and centering fixing device for the upper part of the cathode wire provided by the embodiment of the present invention;

[0035] Figure 2 It is a structural diagram of the assembly of the centering and tensioning device for the lower part of the cathode wire provided by the embodiment of the present invention;

[0036] Figure 3 It is a front structural diagram of the centering sliding bracket provided by the embodiment of the present invention;

[0037] Figure 4 It is a side structural diagram of the centering sliding bracket provided by the background technology of the present invention;

[0038] Figure 5 It is an overall structural diagram of the centering sliding bracket provided by the embodiment of the present invention;

[0039] Figure 6 It is a structural diagram of the roughened anti-slip gasket provided by the embodiment of the present invention;

[0040] Figure 7 It is a structural diagram of the positioning block provided by the embodiment of the present invention;

[0041] Figure 8 It is an overall structural diagram of the hoisting bracket provided by the embodiment of the present invention;

[0042] Figure 9 It is a side structural diagram of the hoisting bracket provided by the embodiment of the present invention;

[0043] Figure 10 It is a structural diagram of the cushion block provided by the embodiment of the present invention;

[0044] Figure 11 It is a structural diagram of the compression spring provided by the embodiment of the present invention;

[0045] Figure 12It is a structural diagram of the T-shaped stainless steel support frame provided by an embodiment of the present invention;

[0046] Figure 13 It is an overall structural diagram of the cathode wire provided by an embodiment of the present invention;

[0047] Figure 14 It is an enlarged view of the end part of the cathode wire provided by an embodiment of the present invention;

[0048] Figure 15 It is a structural diagram of the hexagonal hollow anode plate provided by an embodiment of the present invention;

[0049] Figure 16 It is a structural diagram of the positioning component of the center positioning device provided by an embodiment of the present invention;

[0050] Figure 17 It is a side view of the positioning component of the center positioning device provided by an embodiment of the present invention;

[0051] Figure 18 It is an overall structural diagram of the center positioning device after assembly provided by an embodiment of the present invention;

[0052] Figure 19 It is a structural diagram of the centering installation of the upper part of the cathode wire based on the center positioning device provided by an embodiment of the present invention;

[0053] Figure 20 It is a structural diagram of the centering and tensioning installation of the lower part of the cathode wire based on the center positioning device provided by an embodiment of the present invention;

[0054] Figure 21 It is an overall installation effect diagram of adjusting the center position of the cathode wire at the inscribed circle center of the horizontal plane of the hexagonal hollow anode plate provided by an embodiment of the present invention.

[0055] In the figure, 1, centering sliding support, 1-1, roughened anti-slip surface, 1-2, serrated anti-slip structure, 2, roughened anti-slip gasket, 3, bolt A, 4, bolt B, 5, double nut C, 6, positioning block, 7, compression spring, 8, lifting support, 9, cushion block, 10, cathode wire, 10-1, cathode wire hole, 11, anode plate, 12, T-shaped stainless steel support frame, 13, center positioning device, 13-1, positioning component, 13-2, positioning card seat, 13-3, cathode wire limit hole. Detailed implementation manners

[0056] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0057] An embodiment of the present invention provides a center adjustment and tensioning system for the cathode wire of a thermal power wet electrostatic precipitator, including: a cathode wire 10, an anode plate 12, a centering and fixing device hoisted above the cathode wire 10, a centering and tensioning device installed below the cathode wire 10, and a center positioning device for adjusting the center position of the cathode wire 10 to the anode plate 11.

[0058] The centering and fixing device is hoisted above the cathode wire 10, and the centering and fixing device includes an upper support beam, a centering sliding bracket 1, a hoisting bracket 8, and a positioning block 6. As Figure 1 shown, the centering sliding bracket 1 includes a vertical connecting plate and a horizontal connecting plate fixed to each other. The centering sliding bracket 1 is horizontally slidably and adjustably fixed to the upper support beam through the vertical connecting plate; one end of the hoisting bracket 8 is fixedly connected to the top of the cathode wire 10, and the other end of the hoisting bracket 8 is longitudinally slidably and adjustably fixed to the horizontal connecting plate through bolts and is limited and fixed by the positioning block 6, forming a horizontal cross adjustment in the upper part. The specific implementation method is as follows:

[0059] The upper support beam adopts a T-shaped stainless steel support frame 12 provided with a transverse adjustment long hole, as Figure 12 shown.

[0060] Combined with Figures 3 to 5 shown, the vertical connecting plate is provided with a transverse adjustment long hole, and the centering sliding bracket 1 is slidably and adjustably fixed to the upper T-shaped stainless steel support frame 12 through the transverse adjustment long hole. The horizontal connecting plate is provided with a longitudinal adjustment long hole, and the hoisting bracket 8 is installed in the adjustment long hole of the horizontal connecting plate through bolts and is limited and fixed by the positioning block 6. A reinforcing rib plate is arranged at the connection between the vertical connecting plate and the horizontal connecting plate.

[0061] Among them, a roughened anti-slip surface 1-1 is arranged at the connecting part of the vertical connecting plate, and a roughened anti-slip gasket 2 is installed at the bolt connection part. The structure of the roughened anti-slip gasket 2 is as Figure 6 shown. Two transverse adjustment long holes are vertically and arrayedly arranged on the vertical connecting plate, and two bolts, bolt A 3 and bolt B 4, are respectively fixed at opposite ends of the two adjustment long holes.

[0062] A serrated anti-slip structure 1-2 is arranged on the horizontal surface at the adjustment long hole of the horizontal connecting plate; the bottom surface of the positioning block 6 is a serrated structure, as Figure 7 shown (for facilitating the display of the serrated structure, Figure 7 the serrated structure surface is placed facing up), the center of the positioning block 6 has a bolt through hole, and the positioning block 6 is installed on the horizontal connecting plate through a bolt, and positioning and anti-slip are achieved through the cooperation of the serrated structure on its bottom surface and the serrated anti-slip structure 1-2 of the horizontal connecting plate.

[0063] Combined with Figure 8 、 Figure 9As shown, the hoisting bracket 8 includes a horizontal fixing plate for connecting the centering sliding bracket 1 and two vertical connecting side plates symmetrically arranged on both sides of the horizontal fixing plate. Both ends of the cathode wire 10 have cathode wire holes 10-1 for connection. Bolt holes are provided on the two vertical connecting side plates. During installation, the cathode wire 10 is located between the two vertical connecting side plates, and two side pads 9 are installed. The structure of the pad 9 is as Figure 10 shown, and the connection and fixation of the hoisting bracket 8 and the cathode wire 10 are achieved by bolt connection and fastening.

[0064] At the bolt connection between the hoisting bracket 8 and the centering sliding bracket 1, double nuts C 5 are used for adjustment and fixation.

[0065] The center positioning device 13 is used to adjust the upper part of the cathode wire 10 to the center position of the anode plate 11.

[0066] A centering and tensioning device is installed at the lower part of the cathode wire 10. The centering and tensioning device includes a lower support beam, a centering sliding bracket 1, a hoisting bracket 8, a positioning block 6, and a compression spring 7. As Figure 2 shown, the centering sliding bracket 1 includes a horizontal connecting plate and a vertical connecting plate that are fixedly connected to each other. The centering sliding bracket 1 is horizontally slidably and adjustably fixed to the lower support beam through the vertical connecting plate; one end of the hoisting bracket 8 is fixedly connected to the bottom of the cathode wire 10, and the other end of the hoisting bracket 8 is longitudinally slidably and adjustably fixed to the horizontal connecting plate through an adjusting bolt and is limited and fixed by the positioning block 6 to form a horizontal cross adjustment at the lower part; the adjusting bolt is installed with a compression spring 7 to achieve the tensioning adjustment of the cathode wire 10. The structure of the compression spring 7 is as Figure 11 shown. The specific implementation method is as follows:

[0067] The lower support beam adopts a T-shaped stainless steel support frame 12 provided with a transverse adjustment long hole, as Figure 12 shown.

[0068] Same as the centering and fixing device for the upper part hoisting of the cathode wire 10, the vertical connecting plate is provided with a transverse adjustment long hole, and the centering sliding bracket 1 is horizontally slidably and adjustably fixed to the lower T-shaped stainless steel support frame 12 through the transverse adjustment long hole. The horizontal connecting plate is provided with a longitudinal adjustment long hole, and the hoisting bracket 8 is installed on the adjustment long hole of the horizontal connecting plate through bolts and is limited and fixed by the positioning block 6. A reinforcing rib plate is provided at the connection between the vertical connecting plate and the horizontal connecting plate.

[0069] Among them, a roughened anti-slip surface 1-1 is provided at the connecting part of the vertical connecting plate, and a roughened anti-slip gasket 2 is installed at the bolt connection. The structure of the roughened anti-slip gasket 2 is as Figure 6 shown. Two transverse adjustment long holes are vertically and arrayedly provided on the vertical connecting plate, and two bolts, bolt A 3 and bolt B 4, are respectively fixed at opposite ends of the two adjustment long holes.

[0070] The horizontal surface at the adjustment long hole of the horizontal connecting plate is provided with a serrated anti-slip structure 1-2; the bottom surface of the positioning block 6 is a serrated structure, as Figure 7 shown (for the convenience of showing the serrated structure, Figure 7 the serrated structure surface is placed facing up in the figure), the center of the positioning block 6 has a bolt through hole, the positioning block 6 is installed on the horizontal connecting plate through an adjusting bolt, and the positioning and anti-slip are realized through the cooperation of the serrated structure on its bottom surface and the serrated anti-slip structure 1-2 of the horizontal connecting plate.

[0071] The connection between the hoisting bracket 8 and the centering sliding bracket 1 by bolts is adjusted and fixed by double nuts C 5. A compression spring 7 is installed between the sliding positioning block 6 and the double nuts C 5. Adjusting the double nuts C 5 to compress the compression spring 7 can tighten the cathode wire, and the expansion amount due to the temperature change of the cathode wire during operation can be tightened and straightened by the spring force.

[0072] For the centering fixing device hoisted on the upper part of the same cathode wire 10, the hoisting bracket 8 includes a horizontal fixing plate for connecting the centering sliding bracket 1 and two vertical connecting side plates symmetrically arranged on both sides of the horizontal fixing plate. The two ends of the cathode wire 10 have cathode wire holes 10-1 for connection. Bolt holes are provided on the two vertical connecting side plates. During installation, the cathode wire 10 is located between the two vertical connecting side plates, and two side pads 9 are installed. The structure of the side pads 9 is as Figure 10 shown, and the connection and fixation between the hoisting bracket 8 and the cathode wire 10 are realized by bolt connection and fastening.

[0073] Use the center positioning device 13 to adjust the lower part of the cathode wire 10 to the center position of the anode plate 11.

[0074] The center positioning device is used to ensure that when the cathode wire 10 is installed or adjusted, the cathode wire 10 is located at the center of the anode plate 11. As Figures 16 to 18 shown, the center positioning device 13 includes two symmetrically arranged positioning components 13-1 that are detachably connected. A positioning card seat 13-2 is arranged at the edge of the positioning component, and the positioning card seat 13-2 is used for the limit cooperation between the center positioning device 13 and the anode plate 12. After the two positioning components 13-1 are assembled, a cathode wire limit hole 13-3 is provided at their center position; when the positioning card seat 13-2 is fully buckled with the anode plate 11, the center line of the cathode wire limit hole 13-3 coincides with the center line of the anode plate 11.

[0075] As Figure 15 shown, the anode plate 11 is a hexagonal hollow anode plate. The two symmetrically arranged positioning components 13-1 are assembled into a hexagon and have six positioning card seats 13-2; when the six positioning card seats 13-2 at the edges are all buckled into the anode plate 11, the center line of the cathode wire limit hole 13-3 coincides with the center line of the anode plate 11.

[0076] The upper centering and fixing device of the system forms upper horizontal cross adjustment. By using the central fixing device 12, the upper part of the cathode wire 10 can be adjusted to the central position of the anode plate 11; the lower centering and tensioning device forms lower horizontal cross adjustment. By using the central fixing device 12 for positioning, the lower part of the cathode wire 10 can be adjusted to the central position of the anode plate 11.

[0077] The adjusting bolt compresses the spring to tighten the cathode wire, and the expansion amount due to the temperature change of the cathode wire during operation can be tightened and straightened through the spring force, thus solving the problems of centering adjustment of the cathode wire and tensioning after the expansion of the cathode wire, and ensuring the safe and stable operation of the ultra-low emission equipment.

[0078] In this embodiment, all materials are made of 2205 stainless steel, which improves the commissioning rate and dust removal efficiency of the wet electrostatic precipitator, and reduces the failure rate and environmental pollution risk.

[0079] The embodiment of the present invention also provides an installation and adjustment method for the centering and tensioning system of the cathode wire of the thermal power wet electrostatic precipitator. For the centering and tensioning system of the cathode wire of the thermal power wet electrostatic precipitator described in the above embodiment, the installation process is as follows:

[0080] I. Upper assembly:

[0081] Combined with Figure 19 As shown, fix the upper T-shaped stainless steel support frame 12 to the internal cathode lifting beam, and its vertical plane is located at the center line position of the horizontal plane of a row of hexagonal hollow anode plates, with an error of less than 10 mm. During the assembly of different anode plate modules, individual errors caused by construction, materials, position, etc. may be in the range of: 10 mm ≤ deviation from the center ≤ 50 mm.

[0082] Install the centering and fixing device: Install the centering sliding bracket 1 on the upper T-shaped stainless steel support frame 12 and fasten it with bolts A 3 and bolts B 4; connect the lower part of the lifting bracket 8 (including the cushion block 9) to the upper cathode wire hole 10-1 of the cathode wire 10 through bolts and fasten it. Connect the upper part of the lifting bracket 10 to the centering sliding bracket 1 and the positioning block 6 through bolts, and adjust and fix it through double nuts C 5. The plate teeth of the positioning block 6 mesh with the plate teeth of the centering sliding bracket 1.

[0083] II. Lower assembly:

[0084] Combined with Figure 20 As shown, fix the lower T-shaped stainless steel support frame 12 to the bottom cathode frame, and its vertical plane is located at the center line position of the lower horizontal plane of a row of hexagonal hollow anode plates, with an error of less than 10 mm. During the assembly of different anode plate modules, individual errors caused by construction, materials, position, etc. may be in the range of: 10 mm ≤ deviation from the center ≤ 50 mm.

[0085] Install the self-aligning tensioning device: Install the self-aligning sliding bracket 1 on the lower T-shaped stainless steel support frame 12 and fasten it with bolt A 3 and bolt B 4; Connect the upper part of the lifting bracket 8 (including the cushion block 9) to the lower cathode wire hole 10-1 of the cathode wire 10 by bolts and fasten it. Connect the lower part of the lifting bracket 10 to the self-aligning sliding bracket 1, the positioning block 6 and the compression spring 7 by bolts, adjust and fix it with double nut C 5, and make the serrations of the positioning block 6 mesh with the serrations of the self-aligning sliding bracket 1.

[0086] III. Cathode wire center adjustment:

[0087] Assemble the two sets of center positioning devices 13 from the upper and lower parts respectively for the positioning components 13-1, connect and fix them with bolts, and put the cathode wire into the middle cathode wire limiting hole 13-3.

[0088] Loosen the nuts of bolt A 3 and bolt B 4 at the connection between the upper T-shaped stainless steel support frame 12 and the upper self-aligning sliding bracket 1, slide the self-aligning sliding bracket, and try to make the center line of the adjustment long hole of its horizontal connecting plate coincide with the center line in the same direction of the horizontal plane of the anode plate 11 (adjustable distance: 100 mm), and then tighten the nuts of bolt A 3 and bolt B 4; Loosen the double nut C 5 of the bolt at the connection between the upper self-aligning sliding bracket 1 and the lifting bracket 8, and slide the lifting bracket 8, the bolt and the positioning block 6; Make the cathode wire center close to the anode plate horizontal center (adjustable distance: 100 mm). When all the positioning holders 13-2 of the two sets of center positioning devices 12 just fit into the 6 sides of the anode plate horizontal plane, the error between the cathode wire center and the anode plate horizontal center is less than 10 mm; Then finely adjust according to the position of the cathode wire limiting hole 13-3 of the center positioning device 13 to make the cathode wire center coincide with the anode plate horizontal center. Tighten the double nut of the self-aligning fixing device at the upper part, and adjust the double nut of the self-aligning tensioning device at the lower part to compress the compression spring by 300 N to tension the cathode wire, which can eliminate the expansion elongation of the middle position of the cathode wire within 480 degrees Celsius. Figure 21 It is an overall installation effect diagram of adjusting the cathode wire to be located at the center of the inscribed circle of the horizontal plane of the hexagonal hollow anode plate.

[0089] This system is convenient for adjusting the center, firmly fixed, and does not produce sliding and position change during operation; The expansion amount is compensated and offset by the spring, the cathode wire is tensioned, and the situation of changing the pole pitch discharge after its bending deformation is prevented. This adjustment can be used for the adjustment and installation of the cathode wire of the whole wet electrostatic precipitator; It can also be used for the overhaul and defect elimination of the electric field where the cathode wire of the existing wet electrostatic precipitator is seriously eccentric and has low voltage and frequent discharge after bending deformation. Eliminate the defects of short circuit and ignition of the transformer caused by the eccentricity and bending of the cathode wire changing the pole pitch or lapping the anode plate, improve the wet electric operation rate, and prevent the occurrence of fault shutdown and environmental pollution events.

[0090] Through the above specific embodiments, those skilled in the art can easily implement the present invention. However, it should be understood that the present invention is not limited to the above specific embodiments. Based on the disclosed embodiments, those skilled in the art can arbitrarily combine different technical features to achieve different technical solutions.

[0091] Except for the technical features described in the specification, the rest are well-known technologies to those skilled in the art.

Claims

1. A centering and tensioning system for cathode wires of thermal power wet electrostatic precipitator, characterized in that: include: Cathode wire, anode plate, a centering fixing device hoisted on the upper part of the cathode wire, a centering tensioning device installed on the lower part of the cathode wire, and a center positioning device for adjusting the cathode wire to the center position of the anode plate; The centering fixing device comprises an upper support beam, a centering sliding bracket, a hanging bracket and a positioning block. The centering sliding bracket comprises a vertical connecting plate and a horizontal connecting plate fixed to each other. The centering sliding bracket is fixed to the upper support beam in a lateral sliding and adjustable manner via the vertical connecting plate. One end of the hanging bracket is connected and fixed to the top of the cathode wire, and the other end of the hanging bracket is fixed to the horizontal connecting plate in a longitudinal sliding and adjustable manner via a bolt, and is fixed by a positioning block to form a horizontal cross adjustment at the top. The center positioning device is used to adjust the upper part of the cathode wire to the center position of the anode plate. The self-aligning tensioning device comprises a lower support beam, a self-aligning sliding bracket, a hanging bracket, a positioning block and a compression spring. The self-aligning sliding bracket comprises a horizontal connecting plate and a vertical connecting plate fixed to each other. The self-aligning sliding bracket is fixed to the lower support beam in a lateral sliding and adjustable manner via the vertical connecting plate. One end of the hanging bracket is connected and fixed to the bottom of the cathode wire, and the other end of the hanging bracket is fixed to the horizontal connecting plate in a longitudinal sliding and adjustable manner via an adjusting bolt, and is fixed by a positioning block to form a horizontal cross adjustment at the bottom. The adjusting bolt is installed with a compression spring to realize the tension adjustment of the cathode wire. The center positioning device is used to adjust the lower part of the cathode wire to the center position of the anode plate. The center positioning device is used to ensure that the cathode wire is located at the center of the anode plate when the cathode wire is installed or adjusted; the center positioning device includes two symmetrically arranged positioning components that are detachably connected, and the edges of the positioning components are provided with positioning sockets, which are used to limit the center positioning device and the anode plate; after the two positioning components are assembled, there is a cathode wire limiting hole at the center position; when the positioning socket is fully engaged with the anode plate, the center line of the cathode wire limiting hole coincides with the center line of the anode plate.

2. A thermal power wet electrostatic precipitator cathode line center adjustment and tightening system according to claim 1, characterized in that: The self-aligning sliding bracket, The vertical connecting plate is provided with a transverse adjustment long hole, and the self-aligning sliding bracket is slidably and adjustably fixed to the upper / lower support beam through the transverse adjustment long hole; The horizontal connecting plate is provided with a longitudinal adjustment long hole, and the lifting bracket is installed on the adjustment long hole of the horizontal connecting plate by bolts and is fixed by a positioning block; A reinforcing rib plate is arranged at the connection between the vertical connecting plate and the horizontal connecting plate.

3. A cathode line centering and tightening system for a thermal power wet electrostatic precipitator according to claim 2, characterized in that: The connecting part of the vertical connecting plate is provided with a roughened anti-skid surface, and a roughened anti-skid pad is installed at the bolt connection; A serrated anti-skid structure is arranged on the horizontal surface of the adjusting long hole of the horizontal connecting plate; the bottom surface of the positioning block is a serrated structure, and a bolt through hole is provided at the center of the positioning block. The positioning block is installed on the horizontal connecting plate through the bolts, and positioning and anti-skid are achieved by the serrated structure of its bottom surface cooperating with the serrated anti-skid structure of the horizontal connecting plate.

4. A thermal power wet electrostatic precipitator cathode line center adjustment and tightening system according to claim 2 or 3, characterized in that: The vertical array of the vertical connection plates is provided with two transverse long adjustment holes, and two bolts are respectively fixed at opposite ends of the two long adjustment holes.

5. The cathode line centering and tightening system for thermal power wet electrostatic precipitator according to claim 1 is characterized in that: The hanging bracket includes a horizontal fixing plate for connecting the self-aligning sliding bracket and two vertical connecting side plates symmetrically arranged on both sides of the horizontal fixing plate. The two ends of the cathode wire have connecting holes. The two vertical connecting side plates are provided with bolt holes. When installing, the cathode wire is located between the two vertical connecting side plates, and pads on both sides are installed. The hanging bracket and the cathode wire are connected and fixed by bolt connection and fastening; The bolt connection between the lifting bracket and the self-aligning sliding bracket is fixed with double nuts for adjustment.

6. A thermal power wet electrostatic precipitator cathode line center adjustment and tensioning system according to claim 1 or 2, characterized in that: The upper support beam and the lower support beam are both T-shaped stainless steel support frames with a plurality of transverse adjustment long holes, and the T-shaped stainless steel support frames have reinforcing ribs.

7. The cathode line centering and tightening system for thermal power wet electrostatic precipitator according to claim 1 is characterized in that: The anode plate is a hexagonal hollow anode plate; the two symmetrically arranged positioning components are assembled into a hexagon with six positioning sockets; when the positioning sockets on the six sides are all buckled into the anode plate, the center line of the cathode line limiting hole coincides with the center line of the anode plate.

8. The cathode line centering and tightening system for thermal power wet electrostatic precipitator according to claim 1 is characterized in that: The centering fixing device, the centering tensioning device and the center positioning device are all made of 2205 stainless steel.

9. A method for installing and adjusting the center tensioning system of the cathode line of a thermal power wet electrostatic precipitator, characterized in that: For the cathode line centering tensioning system for thermal power wet electrostatic precipitator according to any one of claims 1 to 8, the installation process is as follows: Fix the upper support beam to the internal cathode hoisting beam, with its vertical surface located at the center line of the horizontal surface of a row of hexagonal hollow anode plates; install the centering fixing device: install the centering sliding bracket to the upper support beam; connect the lower part of the hoisting bracket to the upper hole of the cathode line through bolts and tighten it, connect the upper part of the hoisting bracket to the centering sliding bracket through bolts, and install the positioning block, adjust and fix it through nuts, and the plate teeth of the positioning block are engaged with the plate teeth of the centering sliding bracket; The lower support beam is fixed to the bottom cathode frame, and its vertical surface is located at the center line of the horizontal surface under a row of hexagonal hollow anode plates; Install the self-aligning tensioning device: install the self-aligning sliding bracket on the lower support beam; connect the upper part of the lifting bracket to the lower hole of the cathode line with bolts and tighten it, connect the lower part of the lifting bracket to the self-aligning sliding bracket with bolts, and install the positioning block and compression spring, adjust and fix it with nuts, and the plate teeth of the positioning block and the plate teeth of the self-aligning sliding bracket are engaged.

10. The installation and adjustment method of the cathode line center adjustment tensioning system of a thermal power wet electrostatic precipitator according to claim 9 is characterized in that: The cathode line center adjustment process is as follows: Use two sets of center positioning devices to assemble and fix the positioning components from the upper and lower parts of the cathode wire respectively, and put the cathode wire into the middle cathode wire limiting hole; Loosen the nuts of bolts A and B at the connection between the upper support beam and the upper self-aligning sliding bracket, slide the self-aligning sliding bracket so that the center line of the adjustment long hole of the horizontal connecting plate coincides with the center line of the horizontal plane of the anode plate in the same direction, and tighten the nuts of bolts A and B; loosen the double nuts C of the bolts at the connection between the upper self-aligning sliding bracket and the hanging bracket, slide the hanging bracket and the bolts and positioning blocks; make the cathode line center close to the horizontal center of the anode plate, when all the positioning seats of the two sets of center positioning devices are just inserted into the 6 sides of the horizontal plane of the anode plate, the error between the cathode line center and the horizontal center of the anode plate is less than 10mm; then make fine adjustments according to the position of the center hole of the center positioning device so that the cathode line center coincides with the horizontal center of the anode plate, tighten the double nuts C of the self-aligning fixing device at the top, and adjust the double nuts of the self-aligning tensioning device at the bottom to compress the compression spring to tighten the cathode line, which can eliminate the expansion of the cathode line in the middle position.

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