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DL/T 1983-2019: Technical requirements of water collecting device for wet cooling tower
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Technical requirements of water collecting device for wet cooling tower
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DL/T 1983-2019
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Basic data | Standard ID | DL/T 1983-2019 (DL/T1983-2019) | | Description (Translated English) | Technical requirements of water collecting device for wet cooling tower | | Sector / Industry | Electricity & Power Industry Standard (Recommended) | | Classification of Chinese Standard | K54 | | Classification of International Standard | 27.100 | | Word Count Estimation | 13,126 | | Date of Issue | 2019-06-04 | | Date of Implementation | 2019-10-01 | | Quoted Standard | GB/T 1033.1; GB/T 1040.2; GB/T 1447; GB/T 1449; GB/T 1462; GB/T 1463; GB/T 2406.1; GB/T 2576; GB/T 2577; GB/T 2828.1; GB/T 3854; GB/T 6671; GB/T 8924; DL/T 933 | | Regulation (derived from) | Natural Resources Department Announcement No. 7 of 2019 | | Issuing agency(ies) | National Energy Administration | | Summary | This standard specifies the basic requirements for the production, quality inspection, packaging, storage and transportation of the relevant products of the wet cooling tower high-position water collection device. This standard is applicable to products such as splash guards made of polypropylene materials in high-position water collection devices of wet cooling towers, water collection sloping plates of polyvinyl chloride materials, and water collection tanks made of fiber-reinforced plastic (glass reinforced plastic) materials. | DL/T 1983-2019: Technical requirements of water collecting device for wet cooling tower---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Technical requirements of water collecting device for wet cooling tower
ICS 27.10
K 54
People's Republic of China Electric Power Industry Standard
Technical requirements for high-position water collection device of wet cooling tower
2019-06-04 released
2019-10-01 implementation
Issued by National Energy Administration
Table of contents
Foreword...II
1 Scope...1
2 Normative references...1
3 Terms and definitions...1
4 General...2
5 Technical requirements...2
5.1 Splash guard...2
5.2 Water collecting inclined plate...3
5.3 Water collection tank...3
6 Inspection...4
6.1 Splash guard...4
6.2 Water collecting inclined plate...5
6.3 Water collection tank...5
7 Packaging, marking, storage and transportation...6
Appendix A (normative appendix) water collection tank seepage performance test...7
Appendix B (Normative Appendix) Full Water Deformation Rate Test of the Sump...8
Appendix C (informative appendix) sampling of splash guards...8
Appendix D (informative appendix) Retain samples of sink products...8
Foreword
This standard is in accordance with GB/T 1.1-2009 "Guidelines for Standardization Part 1.Standard Structure and Compilation"
Drafting of rules.
Please note that certain contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents.
This standard was proposed by the China Electricity Council.
This standard is under the jurisdiction of the Power Plant Steam Turbine Standardization Technical Committee.
The main drafting organizations of this standard. Changzhou Jintan Plastic Factory, Xi'an Thermal Power Research Institute Co., Ltd., China Power Engineering Consultants
Group Southwest Electric Power Design Institute Co., Ltd.
The main drafters of this standard. Li Luozhong, Jiang Xiaorong, Yu Bin, Ding Haiguo, Hu Sanji, Jia Mingxiao, Wang Mingyong, Wu Lang
Zhou, Zeng Hua, Peng Degang, Tang Yong.
This standard is issued for the first time.
The opinions or suggestions during the implementation of this standard are fed back to the Standardization Management Center of the China Electricity Council (Beijing
No. 1 Ertiao, Baiguang Road, 100761).
Technical requirements for high-position water collection device of wet cooling tower
1 Scope
This standard specifies the manufacturing, quality inspection, packaging, storage and transportation of related products for wet cooling tower high-position water collection devices
The basic requirements.
This standard is applicable to the splash guard of polypropylene material and the water collecting slope of polyvinyl chloride material in the high-position water collection device of wet cooling tower.
Board and fiber reinforced plastic (glass reinforced plastic) materials such as sinks.
2 Normative references
The clauses in the following documents become clauses of this standard after being quoted in this standard. For all dated reference documents,
All subsequent amendments (excluding errata content) or revisions do not apply to this standard, however, it is encouraged to follow this standard
The parties to an agreement will study whether the latest versions of these documents can be used. For undated references, the latest
The version applies to this standard.
GB/T 1033.1 Determination of the density of plastic non-foam plastics Part 1.Immersion method, liquid pycnometer method and titration method
GB/T 1040.2 Determination of tensile properties of plastics Part 2.Test conditions for molding and extrusion plastics
GB/T 1447 Test method for tensile properties of fiber reinforced plastics
GB/T 1449 Test method for bending performance of fiber reinforced plastics
GB/T 1462 Test method for water absorption of fiber reinforced plastics
GB/T 1463 Fiber-reinforced plastic density and relative density test method
GB/T 2406.1 Determination of combustion behavior of plastics by oxygen index method Part 1.Guidelines
GB/T 2576 Test method for insoluble content of fiber reinforced plastic resin
GB/T 2577 Test method for resin content of glass fiber reinforced plastics
GB/T 2828.1 Sampling Inspection Procedures by Attributes Part 1.Batch-by-Batch Inspection Sampling Searched by Acceptance Quality Limit (AQL)
Sample plan
GB/T 3854 Barcol hardness test method for fiber reinforced plastics
GB/T 6671 Thermoplastic pipe longitudinal shrinkage determination
GB/T 8924 Test method for burning performance of fiber reinforced plastics Oxygen index method
DL/T 933 Cooling tower water spray filler, water remover, spray device performance test method
3 Terms and definitions
3.1
Water collecting device
Installed under the high-position water-receiving cooling tower's sprinkling filler to collect falling water to achieve a high-level interception combination, composed of a water-receiving inclined plate and a water-proof
It is composed of splasher, sink and other components.
3.2
Anti-splashing packs
It is a device that is laid on the water-receiving sloping board to prevent the water droplets falling from the water-sprinkling filler from splashing.
3.3
Cladding plate
Installed at a certain inclination between the sprinkling filler and the water collection trough, intercepts and diverts the water droplets falling from the sprinkle filler to the corrugated plate of the water collection trough.
3.4
Collecting gutter
Installed under the water collecting sloping plate to collect the cooling water flowing out of the water collecting sloping plate, the glass fiber reinforced plastic water tank is generally U-shaped flow section.
3.5
Splashing water rate
The percentage of water splashing outside the splash guard in unit time to the circulating water volume.
4 General
4.1 The products of wet cooling tower high-position water collection device shall meet the following requirements during long-term production and operation.
a) Does not soften and deform under the condition of 65℃ water temperature;
b) It has sufficient rigidity, strength and good aging resistance. Under normal operating conditions, the product geometry
The shape, performance index and installation and connection should be kept stable for a long time;
c) No rupture or water leakage within the normal service life;
d) It should have good flame retardant properties;
e) The normal service life of the splash guard should be no less than 12 years; the normal service life of the water collection ramp should be no less than 20 years;
The normal service life of the tank should not be less than 30 years.
4.2 The overall mechanical properties of the water collection sloping plate, water collection trough and their supporting parts should meet the requirements of structural strength design calculations to ensure cooling
The operation of the tower is safe.
4.3 In addition to complying with this standard, the products of the wet cooling tower high-position water collection device should also comply with the current national and industry regulations,
Specifications and related regulations.
5 Technical requirements
5.1 Splash guard
5.1.1 General technical requirements.
a) The splash guard should be UV-resistant and corrosion-resistant, and will not be deformed or damaged under water scouring within the normal service life;
b) The appearance and color of the splash guard should be uniform, uniform plasticization, no obvious color difference and overheated color. There should be no obvious
Defects such as injuries, impurities, and discoloration lines;
c) The geometric dimensions should meet the design requirements. The module has a regular contour, the allowable deviation of the width dimension is ±3mm, and the length dimension
The allowable deviation is ±5mm, and the allowable deviation of the height dimension is ±2mm.
5.1.2 Physical and mechanical properties
The physical and mechanical properties of the splash guard should meet the requirements of Table 1.
5.2 Water collecting inclined plate
5.2.1 General technical requirements.
a) The water-receiving inclined plate should be anti-ultraviolet, corrosion-resistant, and will not deform or crack under long-term water scouring;
b) The appearance and color of the water collecting inclined board should be uniform, uniform plasticization, no obvious color difference and overheated color;
c) The surface of the water collecting inclined plate should be smooth and flat. There should be no bubbles with a diameter of more than 2mm and a particle size of less than 1mm
The number of impurities on the surface, bubbles below 2mm in diameter and impurities within 1mm in diameter should not exceed 30/m2,
The dispersion degree should not exceed 5/(10cm×10cm);
d) The geometric dimensions of the water-receiving inclined plate should meet the design requirements, the outer contour should be a regular rectangle, and the allowable width deviation is
±3mm, the allowable deviation of length is ±4mm, and the thickness should not be less than 3mm.
5.2.2 Physical and mechanical properties
The physical and mechanical properties of the water collecting sloping plate should meet the requirements of Table 2.
5.3 Collection tank
5.3.1 General technical requirements.
a) There should be a gel coat layer on the inner surface of the sink, and the surface should be smooth and free of cracks;
b) The outer surface of the water collection tank should have a weather-resistant, UV-resistant resin-rich layer, and the surface should be smooth, free of cracks, impurities, and degumming
Layering, no fiber exposure, uniform color;
c) There should be no obvious scratches on the inner and outer surfaces of the sink. There should be no bubbles with a diameter greater than 5mm on the surface, and the diameter is less than
5mm bubbles should not exceed 3/m2;
d) The geometric dimensions of the water collection tank should be determined according to the design requirements, with a length deviation of 0mm -5mm and a width deviation of ±2mm;
e) The flange, upper and lower edges of the connecting flange of the sink should be neat, uniform in thickness, no fiber exposed, no degumming layering
Phenomenon, the section should be treated with resin glue;
f) The thickness of the sink should be no less than 8mm, the thickness of the connecting flange should be uniform, and the thickness of the flange should be no less than 12mm. Flange
The length of the transition section with the water tank should be greater than 100mm, and the thickness should not be less than 10mm;
g) The water collection trough should adopt an open U-shaped section, and the trough wall should be provided with longitudinal and transverse reinforcement ribs. Reinforcement should be filled in the ribs
The reinforcement material should be polyurethane foam material;
h) The stainless steel bolts suitable for the working fluid should be used to connect the water collection tanks of each section, and the distance between the connecting bolts should not be greater than
120mm. The flange connection of the sink should be sealed with water stop tape, and the bolt connection can be fixed with EPDM rubber
The cushion and the U-shaped opening of the water collection tank can be sealed with silicone rubber, and the thickness of the rubber should not be less than 5mm.
5.3.2 The physical and mechanical properties of the water collection tank should meet the requirements of Table 3.
5.3.3 The water collection tank should be tested for water seepage performance before leaving the factory, and the tank body and the connecting flange between the tanks must not have water seepage. experiment method
See Appendix A.
5.3.4 The full water deformation rate test shall be carried out for the water collection tank before leaving the factory, and the deformation rate of the side walls and bottom shall not exceed 0.5%. experiment method
See Appendix B.
6 Inspection
6.1 Splash guard
6.1.1 Batch
The acceptance of splash guards is based on batches, and the splash guards produced continuously with the same raw material, formula, specifications and process are a batch.
The quantity of each batch shall not exceed 5000 pieces.
6.1.2 Sampling
The appearance and specifications of the splash guard are inspected in "blocks", and the general inspection level IL=I specified in GB/T 2828.1 shall be adopted.
Qualified quality level AQL=6.5, normal one-shot sampling plan.
6.1.3 Inspection rules
The discriminant rules for splash guard inspection are as follows.
a) The appearance and specifications of the splash guard should meet the requirements of 5.1.1.Anything that does not meet any of the above requirements is considered a non-conforming product.
The inspection batches of various batches shall be subject to random inspection and judgment according to the sampling quantity and discrimination criteria specified in Table 4.
b) The physical and mechanical properties of the splash guard material should meet the requirements of Table 1.Take two samples (take
The sample method is shown in Appendix C) for material performance inspection, as long as one index fails to meet the requirements, it should be included in the original batch
Double sampling for re-inspection of the project, if still unqualified, the material of the batch of splash guards is judged to be unqualified.
6.2 Water collecting inclined plate
6.2.1 Batch
The acceptance of the water collecting inclined board is based on the batch, and the water collecting inclined board continuously produced with the same raw material, formula, specification and process is one
Batch, the quantity of each batch shall not exceed 5000 yuan.
6.2.2 Sampling
The inspection of the appearance and specifications of the water collecting inclined plate is based on "blocks", and the general inspection level IL=I specified in GB/T 2828.1 shall be adopted.
Qualified quality level AQL=6.5, normal one-shot sampling plan.
6.2.3 Inspection rules
The discriminant rules for the inspection of the water collecting inclined plate are as follows.
a) The appearance and specifications of the water collecting inclined plate should meet the requirements of 5.2.1.Anything that does not meet any of the above requirements is considered unqualified
Product. The inspection batches of various batches shall be subject to random inspection and judgment according to the sampling quantity and discrimination criteria specified in Table 5.
b) The physical and mechanical properties of the material of the water collecting inclined plate shall meet the requirements of Table 2.Take two samples from each batch at the time of acceptance
Perform material performance inspection. As long as one of the indicators fails to meet the requirements, double sampling of the item should be re-inspected in the original batch.
If it is still unqualified, the material of the batch of water collecting inclined plates shall be judged as unqualified.
6.3 Water collection tank
6.3.1 Batch
The acceptance of the sink is based on batches. All the water collection tanks produced with the same specification, the same raw material formula and the same process are
One batch, each batch shall not exceed 1000 segments.
6.3.2 Sampling
The inspection of the appearance and specifications of the water collection tank is based on "segments", using the general inspection level IL=I specified in GB/T 2828.1,
Qualified quality level AQL=10, normal single sampling plan.
6.3.3 Inspection rules
The judging rules for the water collection tank inspection are as follows.
a) The appearance, specifications and water permeability of the water collection tank should meet the requirements of 5.3.1 and 5.3.3 respectively, and the deformation rate should meet 5.3.4
Provisions. Anything that does not meet any of the requirements is considered a non-conforming product. The inspection batches of various batches are in accordance with Table 6
The number of samples and the criteria for the selection are subject to random inspection.
b) The physical and mechanical properties of the water collection tank material should meet the requirements of Table 3.Retain sample three in the same batch of sink products during acceptance
(See Appendix D for sample retention method). Take any one of them for material performance inspection, as long as one index fails to meet the requirements
If required, samples should be taken from the original samples again, and the unqualified items should be re-inspected.
The material is unqualified.
7 Packaging, marking, storage and transportation
7.1 The products of the high-position water collection device should be transported, loaded, unloaded, stored and stacked in a reliable manner to avoid deformation.
7.2 The packed products should be accompanied by product name, specification model, quantity, weight, batch number, manufacturer, production date, and stacking requirements.
The product mark shall be included in the product certificate, inspection report and packing list.
7.3 During loading, unloading, and transportation, the boxed parts must not be heavily pressed or thrown, and prevent direct sunlight.
7.4 The boxed parts should be placed in a flat area and far away from heat sources.
7.5 The splash guard and the water receiving inclined plate should be stacked flat to prevent warping and deformation.
7.6 Both ends of the sink should be fixed with supports to prevent deformation.
Appendix A (Normative Appendix)
Water seepage performance test of sink
Seal both ends of the test tank with blind plates, and hang it on the test frame shown in Figure A.1 or Figure A.2, with the bottom of the tank 0.5m away from the ground,
The water level in the tank is 30mm away from the top of the tank. After 24 hours of storage, observe whether there is any leakage in the tank.
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