HJ 2538-2014 (HJ2538-2014) & related versions
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Technical requirement for environmental protection products Grit removal equipment in grit chamber
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HJ 2538-2014: PDF in English
HJ 2538-2014
Technical requirement for environmental protection products Grit removal equipment in grit chamber
People's Republic of China National Environmental Protection Standards
Environmental protection product cyclone grit removal device
Technical requirement for environmental protection products
Grit removal equipment in grit chamber
Issued on.2014-06-20
2014-9-1 implementation
Issued by the Ministry of Environmental Protection
Table of Contents
Preface ..II
1. Scope .1
2 Normative references ..1
3 Terms and definitions
4 Classification and Nomenclature 1
5 Technical Requirements .2
Performance requirements 6 .3
7 .4 test method
8 .4 inspection rules
9 signs, packaging, transportation and storage .6
Appendix A (informative) cyclone desander device mounting structure and general requirements ..7
Foreword
To implement the "People's Republic of China Environmental Protection Law", to ensure product quality and cyclone grit removal device, development of this standard.
This standard specifies the technical requirements cyclone desander devices, test methods, inspection rules, marking, packaging, transportation and storage
Deposit and other requirements.
This standard is the first release.
This standard is developed by the Ministry of Environmental Protection Science, Technology organization.
This standard drafting units. China Environmental Protection Industry Association (Water Pollution Control Commission), Jiangsu Tianyu Environmental Group
Ltd., Spring Creek Yixing Environmental Protection Equipment Co., Ltd., Jiangsu prosperous Environmental Engineering Technology Co., Ltd.
This standard MEP June 20, 2014 for approval.
This standard since September 1, 2014 implementation.
The standard explanation by the Ministry of Environmental Protection.
Environmental protection product cyclone grit removal device
1 Scope
This standard specifies the technical requirements cyclone desander devices, test methods, inspection rules, marking, packaging, transportation and storage.
This standard applies to urban sewage treatment works, industrial waste water treatment works in cyclone desander devices.
2 Normative references
The standard content of the following documents cited in the articles. For undated references, the effective version applies to this standard.
GB/T 191 Packaging - Pictorial signs
GB 4208 housing protection (IP Code)
GB/T 4942.1 and the overall structure of the rotary motor protection (IP Code) classification
GB/T 6388 transport package shipping mark
GB 8923 steel surface before painting Rust grades and grade
GB/T 9969 General Instructions industrial products
GB/T 10894 separate mechanical noise test method
GB/T 13306 signs
GB/T 13384 mechanical and electrical products packaging General technical conditions
Determination of GB/T 13452.2 Paints and varnishes thickness
GB/T 18449.1 metallic materials Knoop hardness test Part I. Test methods
JB/T 5943 construction machinery welding parts General technical requirements
JB/T 5994 Assembly General technical requirements
3 Terms and Definitions
The following terms and definitions apply to this standard.
3.1 cyclone desander device
The use of hydraulic and mechanical power flow control state and the velocity of the stream, and the use of the density difference and solidarity principle, sand sewage sand sedimentation,
Wastewater pretreatment unit separated (hereinafter. Desanding means).
3.2 equivalent diameter
Diameter and a sand volume of spherical particles of the same shall be the equivalent sand grain size.
3.3 removal efficiency
Desanding means under certain flow pattern and flow conditions, the unit volume of water equivalent diameter greater than a value proportional to remove grit.
4 Classification and Nomenclature
4.1 Classification
Ranked according to the different ways of sand, grit removal device can be divided into stripping desilting desilting and pumping in two forms, the general mounting structure in the form of Appendix A.
4.2 Naming
Desanding model by means of cyclone desander pinyin abbreviation (XCS), desilting way classification pinyin abbreviation (Q stands for "gas
Mention row sand ", B stands for" pump suction sand ") and treated water (m3/h) in Arabic numerals.
Example. XCSQ-1080 represents the processing capacity of 1080m3/h of exhaust gas stripping sand cyclone desander devices.
5 Technical requirements
5.1 Conditions
Medium temperature 5.1.1 grit removal device should 0-40 ℃.
5.1.2 grit removal device applicable power. 380V, 50Hz.
5.1.3 should be set before the pre-grid grit removal apparatus, the gap is not more than 10mm.
5.1.4 grit removal device can remove the minimum sand equivalent diameter of 0.2mm.
5.2 Structure and Function
5.2.1 grit removal device consists of drive mechanism, agitator shaft, impeller, sand suction head or sand pump and other components. Stripping row of sand in the form of stirring shaft mining
With a hollow shaft, suction pump sand in the form of stirring shaft may be hollow or solid shaft. Desanding device structure shown in Figure 1.
Figure .1a stripping row sand cyclone desander device Schematic diagram .1b pumping sand cyclone desander device structure diagram row
1. The drive mechanism; 2. the agitator shaft; 3. impeller; 4 sand suction assembly; five rows of sand pump sand tube to
5.2.2 grit removal device shall have the following functions. Sand sewage tangentially into the grit chamber forming a vortex flow pattern, by rotation of the stirring impeller to help move, up
To a certain flow rate and strengthen the swirl flow pattern. The use of the density difference and the principle of centrifugal force, organic matter with the water away, sand settle to the bottom of the grit chamber discharge.
5.2.3 The actuator should be sealed and reliable, it can not leak, flexible operation, stable and reliable, no abnormal noise.
5.2.4 agitator shaft, impeller, sand suction head made of stainless steel. Stainless steel not less than GB 0Cr18Ni9.
5.2.5 When the agitator shaft with hollow shaft wall thickness not less than 8mm; impeller diameter at 1500mm and above, the blade thickness of not less than
8mm; impeller diameter is less than 1500mm, the blade thickness not less than 6mm; blade angle is preferably 30 °.
5.3 processing requirements
Production 5.3.1 Desanding device shall comply with the standards, and procedures approved by the drawings and technical documents manufacture in accordance with prescribed.
5.3.2 welds should be smooth, without cracks, pores, slag and other defects. Welding and pre-processing operations should be consistent with JB/T 5943 standard
Requirements.
5.3.3 stirring shaft and impeller should be finishing. Its precision machining and assembly of. mixing shaft coaxial deviation should be less than 0.2mm; stir
Concentricity deviation mix shaft and transmission should be less than 0.1mm; concentricity deviation stirring shaft and impeller should be less than 0.2mm; impeller
Stirring axis vertical deviation should be less than 0.2mm.
Transmission gear tooth surfaces subject to heat treatment 5.3.4 transmission mechanism on its tooth surface hardness greater than HRC55.
5.3.5 Type and connection structure between the various components should be reasonable, easy to install and repair the split. Parts should be a tight fit in the work under vibration
The case of dynamic and impact, should have sufficient strength, rigidity and positioning sexual, should meet the requirements of JB/T 5994 technical requirements.
5.3.6 Desanding means rust grade should reach GB/T 8923 provisions Sa2 1/2 grade, rust and paint operations should be consistent with GB/T 13452.2
standard regulation.
5.3.7 The total film thickness of not less than 200μm.
5.4 Installation Requirements
5.4.1 impeller and wall assembly clearance should be controlled at between 10mm ~ 30mm, sand suction head and the bottom of the assembly should be controlled in the pitch
Between 50mm ~ 60mm, assembly concentricity deviation of the impeller and the grit chamber cell body is not more than 20mm.
5.4.2 Vertical assembling of the agitator shaft should be less than 1/1000, and the cumulative deviation is less than 3mm.
6 Performance requirements
6.1 grit removal efficiency
Sand particle size (Q) is usually equivalent diameter expressed in millimeters (mm). Particle size grit removal efficiency shall ≥1mm
Less than 95%; 0.5mm≤ particle size < 1mm grit removal efficiency of not less than 85%; 0.2mm≤ particle size < 0.5mm grit removal efficiency
The rate of not less than 65%.
6.2 Calculation of sand removal
Grit removal rate is calculated as shown in Equation (1).
. 0. 0 21 × - = × =
QQ
Qη (1)
among them.
η ─ removal efficiency (%);
Q ─ total before processing some sand particle size in grams (g);
1Q ─ some sand particle removal in grams (g);
Sand quantity 2Q ─ not removed certain particle size, expressed in grams (g).
6.3 safety and noise
6.3.1 safety facilities and marks
Exposed rotating parts 6.3.1.1 Desanding device should be set shields.
6.3.1.2 unfit operator shall be provided close to dangerous parts clearly marked. Desanding flow device shall be clearly marked rotational direction (arrow
Representation).
6.3.2 Electrical Safety
6.3.2.1 Motor protection rating shall comply with GB/T 4942.1 standard requirements of IP55.
Insulation resistance at room temperature 6.3.2.2 Desanding means live parts shall not be less than 1MΩ. Equipment enclosure should be grounded, grounding resistance should be less than 4Ω.
6.3.3 Noise
No-load running noise grit removal device should not exceed 66dB (A).
7 Inspection Method
7.1 structure and appearance of visual method to check whether the appearance of the machine structure to meet the requirements.
7.2 transmission
Transmission mechanism assembled empty running test, the parts are functioning smoothly.
7.3 leaf thickness and dip
Steel tape measure thickness and length, with a ruler to measure the angle of inclination.
7.4 Welding Quality
Welding quality inspection should be carried out according to the method JB/T 5943 standard requirements.
7.5 gear hardness testing
Transmission gear hardness test measured according to GB/T 18449.1 standard methods.
7.6 rust corrosion quality
Overall equipment rust and corrosion test according to GB 8923, the contents of GB/T 13452.2 standard of conduct.
Film thickness 7.7
Film thickness using an electromagnetic film thickness measurement.
7.8 the stirring shaft and impeller precision machining, assembly
Size of the gap with the corresponding precision measuring ruler. Coaxial agitator shaft should be carried out after the assembly, using dial indicator measurement. group
Level measuring device using verticality.
7.9 parts assembly
Member assembly according to JB/T 5994 regulations inspection.
7.10 removal efficiency
When measuring the removal efficiency of grit removal apparatus, mesh size diameter of 1mm, 0.5mm, 0.2mm mesh, respectively, before the treatment of sewage
Water and treated sewage filtered weighed before and after treatment of the weight of sand, according to the formula 6.2 (1) is calculated separately
Particle size ≥1mm, 0.5mm≤ particle size < 1mm and 0.2mm≤ particle size < 0.5mm grit removal efficiency.
7.11 safety facilities and marks
Exposed transmission parts was visually observed whether or not a safety cover, whether rotating parts and dangerous parts of the safety alert symbol.
7.12 Electrical Safety
7.12.1 Enclosure rating tested according to GB 4208 provisions.
7.12.2 Insulating resistance 500V megger grit removal device housing between live parts, grounding resistance tester to check the body's electrical grounding
Resistance.
7.13 Noise
According to GB/T 10894 were Desanding device noise level testing.
8 Inspection Rules
8.1 Inspection classification
Desanding test apparatus factory inspection sub-two kinds of test patterns.
8.2 factory inspection
8.2.1 Each grit removal device manufacturing units shall be subject to quality inspection department inspection, and issue a certificate after passing the factory.
8.2.2 factory inspection items are shown in Table 1.
8.3 Type inspection
8.3.1 Type test conditions
When one of the following conditions, type of inspection should be carried out.
a) The new product type or old products to the plant production;
b) Product Discontinuance more than two years to restore production;
c) after the product of normal production, due to changes in product design, construction, materials, technology and other factors that may affect performance when products are;
d) The factory test results and the last type test differs considerably;
e) the normal production cycle-type test.
8.3.2 Type inspection items
Desanding device type inspection items are shown in Table 1 as specified in the project.
8.3.3 Sampling Method
8.3.3.1 type test factory inspection qualified products should extract 1, the base sample of not less than two.
8.3.3.2 a decimated sample storage, to confirm the test results before the correct operation of the product in addition to maintenance manual for maintenance, without the
Not permitted without the repair and replacement parts.
Table 1 cyclone grit removal apparatus and method for detecting items
No. Test project requirements, test methods factory inspection type test
1 Structure and Function 5.2 7.1-7.3 √ √
2 processing and assembly requirements 5.3,5.4 7.4-7.9 √ √
3 removal efficiency 6.1 7.10 - √
4 safety facilities and marks 6.3.1 7.11 √ √
5 Electrical Safety 6.3.2 7.12 √ √
6 Noise 6.3.3 7.13 - √
8.4 determine the rules
8.4.1 Desanding means testing with the standard requirements, judged to be acceptable.
8.4.2 If the sample checks have failed items, should be doubled sampling, the project failed recheck, recheck if the result is qualified, you can still sentence
Given batch of qualified products.
8.4.3 If the product re-examination, any one still a failure occurs, it is determined that the product failed.
9 signs, packaging, transportation and storage
9.1 mark
9.1.1 appropriate and obvious location on the product nameplate fixed, the type and size should be consistent with the relevant provisions of GB/T 13306 of. Desanding apparatus Ming
Content licensing include.
a) Product name and model;
b) manufacturing company name;
c) The main technical parameters. capacity, motor power;
d) Power category;
e) use of environmental conditions, the medium temperature.
f) the date of manufacture and serial number;
9.1.2 Packaging Storage icon flag shall comply with GB/T 191, the transport package shipping mark shall comply with GB/T 6388's. package
Transportation icon logo include.
a) Product name and model;
b) Receiving station name and organization;
c) net weight, gross weight and dimensions;
d) the name and address of the manufacturing company.
9.1.3 Instructions shall be prepared in line with GB/T 9969 requirements.
9.2 Packaging
Desanding device packaging should comply with GB/T 13384 and GB/T 191's.
9.3 Transportation and storage
9.3.1 Transport process should avoid the collision and impact.
9.3.2 grit removal device should be placed in ventilated, dry, non-corrosive media, have shelter and a place to save.
Appendix A
(Informative)
General mounting structure and requirements cyclone desander device
General mounting structure shown in Figure A.1 cyclone desander means A.1.
General appearance of the structure shown in Figure A.2 Grit Chamber A.2.
Water out
Rotation
direction
KK
DC
KK P to
1. The drive mechanism;. Agitation axis 2; 3. Impeller; 4. sand suction assembly
Figure A.1a stripping sand cyclone desander device structure diagram
1. The drive mechanism; 2. the agitator shaft; 3. impeller; 4 tube to drain sand
Row sand pump
Figure A.1b row sand pump sand cyclone desander device structure diagram
Figure A.2a concrete grit chamber shape structure diagram
IJ
Rotation
direction
P to E
Water
Figure A.2b steel grit chamber shape structure diagram
A.3 General Dimensions Grit
A.3.1 concrete Grit Dimensions Table A.1
Table A.1 concrete Grit Dimensions Unit. mm
size
Model grit chamber
A diameter
Set the sand hopper
Diameter B
Inlet Channel
Width C
The canal
Width D
cone
Diameter E
Set the sand hopper
Depth F
High slope
Of G
channel
Depth J
Grit
Depth L
XCS □ -180 1830 305 610 1400 300 300 300 1400
XCS □ -360 2130 380 760 1400 300 300 300 1400
XCS □ -720 2430 450 900 1550 400 300 400 1550
XCS □ -1080 3050
1550 5003004501800
XCS □ -1980 3650 750 1500 1700 600 510 580 2050
XCS □ -3170 4870 1000 2000 2200 1000 510 600 2850
XCS □ -4750 5480 1100 2200 2200 1100 610 630 2850
XCS □ -6300 5800 1200 2400 2500 1200 760 700 3250
XCS □ -7200 6100
25001300760750 3250
A.3.2 Steel Grit Dimensions Table A.2
Table A.2 Steel Grit Dimensions Unit. mm
size
Model grit chamber
A diameter
Set Sand
Straight fight
Path B
Inlet
Diameter C
Outlet pipe
Diameter D
cone
diameter
Set the sand hopper
Depth F
High slope
Of G
Inlet
Center height J
Outlet pipe
Center high I
Grit
Depth L
XCS □ -180 1830 300 600 1400 300 750 600 1400
XCS □ -360 2130 400 700 1400 300 750 600 1400
XCS □ -720 2430 500 800 1550 400 800 600 1550
XCS □ -1080 3050
1550 4508506501800
XCS □ -1980 3650 700 1000 1700 600 900 700 2050
XCS □ -3170 4870 900 1200 2200 1000 1000 800 2850
XCS □ -4750 5480
2,200,100,011,008,502,850
General requirements A.4 grit chamber cell body
Grit chamber cell body can be reinforced concrete or steel. Concrete grade reinforced concrete not less than C25, its thickness and diameter of tank ≤3m
Not less than 250mm; pool diameter > 3m when their thickness is not less than 300mm. Steel grit chamber diameter of tank ≤2.5m its plate thickness not less than 8mm;
Pool diameter of between 2.5m to 4m when its plate thickness not less than 10mm; diameter of tank > 4m when its plate thickness not less than 12mm. Grit chamber cell body
Principle of selection should meet the quantity and quality requirements.
Construction and production of grit chamber cell body should be flat, smooth, and its roundness deviation should be no greater than the diameter of 10/1000, accumulated no more than 30mm;
Concentricity deviation cone and grit chamber is not more than 20mm.
......
| Standard ID | HJ 2538-2014 (HJ2538-2014) | | Description (Translated English) | Technical requirement for environmental protection products Grit removal equipment in grit chamber | | Sector / Industry | Environmental Protection Industry Standard | | Classification of Chinese Standard | P41 | | Classification of International Standard | 13.060.99 | | Word Count Estimation | 14,175 | | Date of Issue | 2014/6/20 | | Date of Implementation | 2014/9/1 | | Quoted Standard | GB/T 191; GB 4208; GB/T 4942.1; GB/T 6388; GB/T 8923.1; GB/T 9969; GB/T 10894; GB/T 13306; GB/T 13384; GB/T 13452.2; GB/T 18449.1; JB/T 5943; JB/T 5994 | | Drafting Organization | China Environmental Protection Industry Association (Water Pollution Control Commission) | | Administrative Organization | ?Ministry of Environmental Protection Science, Technology | | Regulation (derived from) | Ministry of Environmental Protection Notice No. 45 of 2014 | | Summary | This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of swirling desander equipment. This standard applies to urban sewage treatment works, industrial wastewater treatment works in the cyclone desanding device. |
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