CN215896971U - Lightning protection system for anaerobic pool and ammonia tank of thermal power plant - Google Patents
Lightning protection system for anaerobic pool and ammonia tank of thermal power plant Download PDFInfo
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- CN215896971U CN215896971U CN202121845910.1U CN202121845910U CN215896971U CN 215896971 U CN215896971 U CN 215896971U CN 202121845910 U CN202121845910 U CN 202121845910U CN 215896971 U CN215896971 U CN 215896971U
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Abstract
The utility model discloses a lightning protection system for an anaerobic pool and an ammonia tank of a thermal power plant, which comprises: a roof lightning protection unit and a ground lightning protection unit; the roof lightning protection unit comprises a lightning protection grid, a plurality of down leads and a first ground grid; the lightning protection grid is arranged on the roof surface of the anaerobic pool or the ammonia tank in a surrounding manner, the first ground net is buried underground around the anaerobic pool or the ammonia tank, the first end of the down lead is fixedly connected with the lightning protection grid, and the second end of the down lead is connected with the first ground net; the ground lightning protection unit comprises a lightning rod and a second ground network; the lightning rod is an independent lightning rod, the second grounding grid consists of a second horizontal grounding electrode and a plurality of second vertical grounding electrodes, and the plurality of second vertical grounding electrodes are connected in series through the second horizontal grounding electrode; the lightning rod is arranged at the center of the second ground grid and is fixedly connected with the second horizontal grounding electrode. The utility model protects the anaerobic tank and the ammonia tank through the lightning protection system, thereby effectively reducing the potential safety production hazards of explosion, fire, personal injury and the like caused by the anaerobic tank and the ammonia tank in thunderstorm weather.
Description
Technical Field
The utility model belongs to the field of lightning protection devices, and particularly relates to a lightning protection system for an anaerobic pool and an ammonia tank of a thermal power plant.
Background
The waste incineration treatment scale of a general thermal power plant is 2000t/d, 3 grate waste incinerators of 750t/d, 2 steam turbine generator sets of 25MW in installed power generation capacity are adopted, and the designed treatment capacity of a waste leachate treatment system is 600m3D (leachate 460 m)3D + low concentration 140m3And d), the main process of the percolate treatment is 'adjusting tank pretreatment + anaerobic (UASB) system + external MBR (two-stage AO biochemical) + NF + RO'. Because the anaerobic tank can generate methane gas in normal operation, ammonia gas can be generated by ammonia water stored in the ammonia tank when the ammonia water leaks, the two gases reach explosive concentration, and explosion can be generated once sparks are encountered. Under the general condition, the risk that the anaerobism pond and ammonia tank were hit in the thunderstorm weather has violently the thunder, thereby meets the spark and will produce the explosion and cause the safety in production accident, consequently in order fully to protect anaerobism pond, ammonia tank not by the thunderbolt when the thunderstorm, sets up a lightning protection device system to anaerobism pond, ammonia tank, carries out complete protection to anaerobism pond and ammonia tank and becomes the research direction.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects in the prior art, the utility model provides a lightning protection system for an anaerobic pool and an ammonia tank of a thermal power plant, which can completely protect the anaerobic pool and the ammonia tank and reduce the potential safety production hazard by reasonably arranging a lightning protection grid, a ground grid and a lightning rod.
In order to achieve the above object, an embodiment of the present invention provides a lightning protection system for an anaerobic tank and an ammonia tank of a thermal power plant, comprising: roofing lightning protection unit and ground lightning protection unit.
The roof lightning protection unit comprises a lightning protection grid, a plurality of down leads and a first ground grid; the lightning protection grid is arranged around the roof surface of the anaerobic pool or the ammonia tank, the first ground grid is buried underground around the anaerobic pool or the ammonia tank, the first end of the down conductor is fixedly connected with the lightning protection grid, and the second end of the down conductor is connected with the first ground grid; the down leads are symmetrically arranged, the spacing between the down leads is less than 18 meters, and the grid size of the lightning protection grid is less than 10 x 10 m; the first grounding grid consists of a first horizontal grounding electrode and a plurality of first vertical grounding electrodes, the first vertical grounding electrodes are respectively embedded in the deep trench on the ground, the spacing between the first vertical grounding electrodes is 5 meters, and the first vertical grounding electrodes are electrically connected in series through the first horizontal grounding electrodes; the ground lightning protection unit comprises a lightning rod and a second ground network; the lightning rod is an independent lightning rod, the second ground grid is composed of a second horizontal grounding electrode and a plurality of second vertical grounding electrodes, the second vertical grounding electrodes are respectively embedded in deep grooves in the ground, the interval between the second vertical grounding electrodes is 5 meters, the second vertical grounding electrodes are connected in series through the second horizontal grounding electrodes, the lightning rod is arranged at the central position of the second ground grid, and the lightning rod is fixedly connected with the second horizontal grounding electrodes; the distance between the lightning rod and the anaerobic tank or the ammonia tank is more than 5 meters; the distance between the first vertical grounding electrode and the second vertical grounding electrode is more than 3 meters.
Furthermore, the lightning protection grid is made of phi 10mm hot-dip galvanized round steel, and the down lead is made of phi 10mm hot-dip galvanized round steel.
Furthermore, the first horizontal grounding electrode and the second horizontal grounding electrode adopt phi 4mm x 40mm hot galvanized flat steel.
Further, the first vertical grounding electrode and the second vertical grounding electrode are phi 20 x 2500mm copper clad steel grounding electrodes.
Further, the depth of the deep trench in the ground is more than 80 cm.
Further, the lightning rod is 30 meters high when being used in a lightning protection system of the anaerobic pool.
Further, the lightning rod is 25 meters in height when used in a lightning protection system of an ammonia tank.
Further, when the lightning protection grid is used for a lightning protection system of the anaerobic tank, the lightning protection grid is connected with the stainless steel handrail of the anaerobic tank.
Further, when the lightning protection grid is used for a lightning protection system of the ammonia tank, the lightning protection grid is connected with the aluminum alloy shutter outside the ammonia tank.
The utility model has the beneficial effects that:
1. the lightning protection grid, the ground net and the lightning rod are scientifically and reasonably arranged on the anaerobic pool and the ammonia tank in a systematic way, so that the anaerobic pool and the ammonia tank are completely protected through the lightning protection system, and the potential safety production hazards of explosion, fire and personal injury caused by the anaerobic pool and the ammonia tank in thunderstorm weather are reduced;
2. in order to prevent counterattack, the utility model sets an independent lightning rod and an independent ground net, and clearly and effectively sets the distance between the lightning rod and the ground surface and the underground of the anaerobic tank and the ammonia tank, so that the flashover voltage of an insulating medium is greater than the counterattack voltage, the lightning rod is not subjected to counterattack by a protected object, the flashover to the grounding body of the anaerobic tank and the ammonia tank in soil is avoided, and the safety of the whole lightning protection system is obviously improved.
Drawings
FIG. 1 is a schematic structural diagram of a lightning protection system for an anaerobic pool and an ammonia tank of a thermal power plant according to the utility model;
FIG. 2 is a schematic structural view of a lightning protection system of an anaerobic tank according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a lightning protection system for an ammonia tank of one embodiment of the present invention;
fig. 4 is a schematic structural diagram of a distance between a first vertical ground electrode and a second vertical ground electrode according to an embodiment of the utility model.
In the figure:
the lightning protection device comprises a roof lightning protection unit 1, a ground lightning protection unit 2, a lightning protection grid 11, a down lead 12, a first ground grid 13, a lightning rod 21, a second ground grid 22, a first horizontal grounding electrode 131, a first vertical grounding electrode 132, a second horizontal grounding electrode 221 and a second vertical grounding electrode 222.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear, the following description is further made with reference to the accompanying fig. 1-4 and examples.
Taking a thermal power plant as an example, the waste incineration treatment scale is 2000t/d, 3 grate waste incinerators of 750t/d are adopted, and the installed power generation capacity is 2 turbine generator sets of 25 MW. The current lightning protection facility of anaerobism pond and ammonia tank fails the complete protection, can produce methane gas in the anaerobism pond normal operating, and the aqueous ammonia that the ammonia tank was stored is revealed and can is produced the ammonia, and above-mentioned two kinds of gases reach explosive concentration, in case meet the spark and will produce the explosion. The height of the anaerobic tank is 13 meters, the distance from the chimney is 108 meters, and the edge of the top of the tank is provided with a stainless steel fence with 1.4 omega resistance to ground. The ammonia tank is 18 meters high and is installed in a house made of aluminum alloy shutters, the roof material is color steel tiles, the resistance of the metal shutters to the ground is 2.2 omega, the distance from the metal shutters to a chimney is 67 meters, the ammonia tank is leaned on the south side of a mountain, and the risk of transverse thunderstorm is caused in thunderstorm weather. According to the lightning protection radius calculated by the rolling ball method in the building lightning protection design specification, the anaerobic pool and the ammonia tank are not in the effective lightning protection radius range of the chimney, and only metal objects on the top of the existing anaerobic pool and the top of the tank can be used as lightning protection, so that the lightning protection capability needs to be enhanced in order to fully protect the anaerobic pool and the ammonia tank from being struck by lightning in thunderstorm.
As shown in fig. 1, an embodiment of the present invention provides a lightning protection system for an anaerobic tank and an ammonia tank of a thermal power plant, including: a roof lightning protection unit 1 and a ground lightning protection unit 2.
The roof lightning protection unit 1 comprises a lightning protection grid 11, a plurality of down leads 12 and a first ground grid 13; the lightning protection grid 11 is arranged on the roof surface of the anaerobic pool or the ammonia tank in a surrounding manner, the first ground grid 13 is buried underground around the anaerobic pool or the ammonia tank, the first end of the down conductor 12 is fixedly connected with the lightning protection grid 11, and the second end of the down conductor 12 is connected with the first ground grid 13; the down leads 12 are symmetrically arranged, the spacing between the down leads 12 is less than 18 meters, and the grid size of the lightning protection grid 11 is less than 10 x 10 m; the first ground grid 13 is composed of a first horizontal ground electrode 131 and a plurality of first vertical ground electrodes 132, the plurality of first vertical ground electrodes 132 are respectively embedded in the ground deep trench, and the depth of the ground deep trench is greater than 80 cm. The interval between the first vertical grounding electrodes 132 is 5m, and the first vertical grounding electrodes 132 are connected in series through the first horizontal grounding electrode 131.
The ground lightning protection unit 2 comprises a lightning rod 21 and a second ground network 22; the lightning rod 21 is independent lightning rod, and the second ground net 22 comprises second horizontal earthing pole 221 and a plurality of second vertical earthing poles 222, and a plurality of second vertical earthing poles 222 are buried in ground deep groove respectively, and the interval is 5 meters between a plurality of second vertical earthing poles 222, and a plurality of second vertical earthing poles 222 pass through second horizontal earthing pole 221 electrical connection, and lightning rod 21 is located with second ground net 22 central point, lightning rod 21 links firmly with second horizontal earthing pole 221.
The first horizontal grounding electrode 131 and the second horizontal grounding electrode 221 adopt 4 mm-40 mm hot galvanized flat steel; the first vertical grounding electrode 132 and the second vertical grounding electrode 222 are copper-clad steel grounding electrodes with phi 20 x 2500 mm. The lightning protection grid is made of phi 10mm hot-dip galvanized round steel, and the down lead is made of phi 10mm hot-dip galvanized round steel. The lightning protection grid is smaller than 12 x 8.
In the concrete implementation, as shown in fig. 2, the lightning rod 21 used in the lightning protection system of the anaerobic tank is 30 meters high, and the lightning protection grid is also connected with the stainless steel railing of the anaerobic tank. As shown in the attached figure 3, the lightning rod 21 used in the lightning protection system of the anaerobic tank is 25 meters high, and the lightning protection grid is also connected with aluminum alloy shutters outside the ammonia tank.
Because the lightning rod can generate counterattack discharge when being struck by lightning, the counterattack can cause insulation damage of electrical equipment, burn-through of metal pipelines, and even cause explosion, fire and personal injury to some buildings. In order to prevent or reduce the probability of back-strike discharge to an anaerobic pool or an ammonia tank when the lightning rod is struck by lightning, the utility model adopts the independent lightning rod, and the independent lightning rod refers to a lightning arrester formed by assembling and erecting a special tower, such as an iron tower, and installing a lightning receptor on the upper part of the tower without other buildings, structures and the like. And the independent lightning rod in the utility model adopts the independent grounding grid separated from the anaerobic pool or the ammonia tank, so that the equipment safety of the anaerobic pool or the ammonia tank can be more effectively ensured.
As shown in fig. 4, in order to prevent the counterattack, there must be a distance between the lightning rod 21 and the nearby metal conductor, so that the flashover voltage of the insulating medium is greater than the counterattack voltage, and the air distance over which the lightning rod does not occur but is counterattacked by the protected object should generally not be less than 5 m. A certain distance should be kept between the first vertical grounding electrode 132 of the grounding device of the lightning rod 21 and the second vertical grounding electrode 222 of the other grounding body so as to prevent flashover to the grounding body of the protected object in the soil, and dc is generally not less than 3m according to the operation experience.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (9)
1. The utility model provides a thermal power plant anaerobism pond, ammonia tank lightning protection system which characterized in that, it includes: a roof lightning protection unit and a ground lightning protection unit;
the roof lightning protection unit comprises a lightning protection grid, a plurality of down leads and a first ground grid; the lightning protection grid is arranged around the roof surface of the anaerobic pool or the ammonia tank, the first ground grid is buried underground around the anaerobic pool or the ammonia tank, the first end of the down conductor is fixedly connected with the lightning protection grid, and the second end of the down conductor is connected with the first ground grid; the down leads are symmetrically arranged, the spacing between the down leads is less than 18 meters, and the grid size of the lightning protection grid is less than 10 x 10 m; the first grounding grid consists of a first horizontal grounding electrode and a plurality of first vertical grounding electrodes, the first vertical grounding electrodes are respectively embedded in the deep trench on the ground, the spacing between the first vertical grounding electrodes is 5 meters, and the first vertical grounding electrodes are electrically connected in series through the first horizontal grounding electrodes;
the ground lightning protection unit comprises a lightning rod and a second ground network; the lightning rod is an independent lightning rod, the second ground grid is composed of a second horizontal grounding electrode and a plurality of second vertical grounding electrodes, the second vertical grounding electrodes are respectively embedded in deep grooves in the ground, the interval between the second vertical grounding electrodes is 5 meters, the second vertical grounding electrodes are connected in series through the second horizontal grounding electrodes, the lightning rod is arranged at the central position of the second ground grid, and the lightning rod is fixedly connected with the second horizontal grounding electrodes;
the distance between the lightning rod and the anaerobic tank or the ammonia tank is more than 5 meters; the distance between the first vertical grounding electrode and the second vertical grounding electrode is more than 3 meters.
2. The thermal power plant anaerobic tank and ammonia tank lightning protection system of claim 1, wherein the lightning protection grid is made of phi 10mm hot galvanized round steel, and the down conductor is made of phi 10mm hot galvanized round steel.
3. The thermal power plant anaerobic pond, ammonia can lightning protection system of claim 1, wherein the first horizontal grounding electrode and the second horizontal grounding electrode are made of phi 4mm x 40mm hot galvanized flat steel.
4. The thermal power plant anaerobic tank, ammonia tank lightning protection system of claim 1, wherein the first vertical ground electrode and the second vertical ground electrode are phi 20 x 2500mm copper clad steel ground electrodes.
5. The thermal power plant anaerobic tank, ammonia tank lightning protection system of claim 1, wherein the ground deep trench depth is greater than 80 cm.
6. The thermal power plant anaerobic tank and ammonia tank lightning protection system of claim 1, wherein the lightning rod is 30 meters high when used in the lightning protection system of the anaerobic tank.
7. The thermal power plant anaerobic pond, ammonia tank lightning protection system of claim 1, wherein the lightning rod is 25 meters high when used in the lightning protection system of the ammonia tank.
8. The thermal power plant anaerobic tank and ammonia tank lightning protection system of claim 1, wherein the lightning protection grid is connected to the anaerobic tank stainless steel railing when the lightning protection grid is used in the lightning protection system of the anaerobic tank.
9. The thermal power plant anaerobic pond and ammonia tank lightning protection system of claim 1, wherein when the lightning protection grid is used in the lightning protection system of the ammonia tank, the lightning protection grid is connected with aluminum alloy shutters outside the ammonia tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121845910.1U CN215896971U (en) | 2021-08-09 | 2021-08-09 | Lightning protection system for anaerobic pool and ammonia tank of thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121845910.1U CN215896971U (en) | 2021-08-09 | 2021-08-09 | Lightning protection system for anaerobic pool and ammonia tank of thermal power plant |
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| CN215896971U true CN215896971U (en) | 2022-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114759375A (en) * | 2022-05-07 | 2022-07-15 | 北京万云科技开发有限公司 | Large-scale charge balance surface direct lightning protection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114759375A (en) * | 2022-05-07 | 2022-07-15 | 北京万云科技开发有限公司 | Large-scale charge balance surface direct lightning protection device |
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