JB/T 8700-1998 Technical Specifications for Horizontal Axis Rotating Brush Aerators for Oxidation Ditches
Some standard content:
IC5 13.030.40
Machinery Industry Standard of the People's Republic of China
JB/r8700-1998
Horizontal Shaft Rotating Brush Aerator for Oxidation Ditch
Technical Conditions
Technical Conditions Rotor acrator ith horizontalshaft used in oxidation ditch1998-3-19 Released by the Ministry of Machinery Industry of the People's Republic of China on July 1, 1998, implemented by JB/8700-1998, intercontinental standard for energy efficiency, technical requirements, test methods, inspection rules, vehicle marking, color matching, transportation and storage, JB/187001998, vehicle marking was proposed by the Environmental Protection Machinery Standard Promotion Technical Committee of the Ministry of Machinery Industry and was drafted by the Jiangsu Environmental Protection Machinery Industry Corporation Northern Machinery Science Research Institute. The drafting units of this standard are Hang Haoqiu, Kang Zhongmin, Zhang Xiangfan and Zheng Jinhuai. 1 Scope
Machinery Industry Standard of the People's Republic of China
Oxidation Ditch Horizontal Aerator
Technical Conditions
Technical Conditioner Lo Rotor Serator with Brushed Oxide in Oridatian Dileb
JB/T 8700-1998
This standard specifies the type, basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of horizontal aerators in oxidation ditches.
This standard is applicable to horizontal aerators with oxidants (hereinafter referred to as aerators). This equipment is mainly used as aeration equipment in the sewage aeration system of oxidation ditches.
2 Cited Standards
The provisions contained in the following standards constitute the provisions of this standard by citing them in this standard. When this standard is published, the following provisions shall apply: All standards will be revised. Notices using this standard should investigate the possibility of using the latest version of the following standards. GB221 54
CB 700-88
GB/ 1184:1956
GR/T 3220-92
GB4720H
GB 4542.1 85
CBM4-86
GR8SE3RR
GRS43SB8
CB11225-83
(13/T13306-9]
GB/T t3384-92
JB293286
IB/T 5UR6-51
JB/T31
3 Standards
Method of indicating steel product grades
Carbon steel structure
Shape and position tolerances
Standard steel bars
Control equipment Part 1: General voltage and pressure control equipment Electrical equipment Classification of external pollution protection
Casting dimensions
Rust level and rust removal of steel surface before installation Iron parts
Pay attention to the control of the public welfare angle
General technical software for packaging of electromechanical products
Technical conditions for the manufacture of water treatment equipment
General technical conditions for mechanical machining parts of engineering machinery welding General technical parts
Standard application, list definition.
3.1 Oxygen energy (SOIR
Standard oxygen transfer rate, refers to the water temperature of 20,1. Noise machine in unit time The oxygen added to the clean water with zero oxygen decomposition, that is, the oxygenation per unit length per hour. The unit is kgD:/(m·h). Approved by the Ministry of Machinery Industry on March 19, 1998, 1998-$7-01 Standard Air Efficiency (SAE) J0/T87001998, also known as standard air efficiency, refers to the oxygen decomposition of membrane air in water at a temperature of 0 (1 am) in the seasonal water. The oxygen delivered per unit shaft speed consumed is expressed in kgO/(kW-h).
The relationship between power efficiency and oxygenation efficiency:
Power efficiency = oxygenation capacity + effective length of brush NwwW.bzxz.Net
In the formula, N
extraction efficiency kw,
3.3unit shaft speed W
The ratio of oxygenation capacity to power efficiency gives the power consumption per unit length of brush, kWm3. 4 Mixing efficiency
means dynamic real power. It refers to the average flow rate per square meter of the groove surface produced by the inactive filter sedimentation (and the shaft power consumed. It is w/m. It can also be defined as the total volume (mW) of the liquid in the groove that consumes 1kW of shaft power to reach a half-average flow rate of 0.m/m) 3.5 Push C
This paper shows that when the average mixing speed reaches .3m/g, the total volume of the liquid that can be moved per rotation is m. The relationship between the total efficiency and the pushing power is as follows: (2)
4.! The marking is represented by the phonetic letters of the characters in the equipment name and the corresponding characters: YH-!
Y means single-speed motor, " means variable speed, D means dual-speed motor, B means double-speed motor, and N is non-bridge structure. Effective length m
Rotary diameter. mr
Oxidation ditch type
Slow air compressor: Wmm, effective length 35m, bridge structure. Equipped with single-speed motor, English: YITG-?GC/200-EY
5 Performance data
The performance parameters of the air compressor shall comply with the requirements of the table 2
JB/F8700
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1B/T8700—1998
The air machine is composed of an engine, a reduction device, a coupling and a brush body. Its basic structure is shown in Figure 1 and Figure %,
[-Electric group 12-Assembly view: 3-Vertical coupling, 4 Brush body: -Carrying effect IHG type horizontal axis brush heater schematic diagram
[-V belt: 2 Reduce the filling amount, 3-coupling 11-motor or machine: 5-frame: 6.-brush]:?--shaft seat Figure 2 Bridge test will be the peak gas machine state diagram
Technical requirements
.1 The gas machine should comply with the provisions of this standard, and be manufactured in accordance with the drawings and technical specifications of the batch, 7.2 Performance of the whole machine
.2. [The whole machine should be active and free of abnormal noise when running 7.2.2 The main shaft runs smoothly. The slight runout tolerance should meet the 11-level accuracy requirements in B/T3184, and the shaft time rate is dynamic Should not be larger than (.5mm
JB/T7001998
7.2, 3 The exhalation mechanism should comply with the relevant provisions of 29:12. 1.2.4 External parts should comply with the relevant national standards and have product certification. 1.2.5 The bearing and the blower should be installed on the same horizontal plane, and the output shaft tolerance of the two beats should comply with the 7-level auxiliary requirements in (B/T1181.
The blade height, speed, oxygenation capacity, shaft power, power efficiency and driving force of the blower should comply with the requirements in Table 1. 7.2.6
7.2.7 The electric control equipment shall have good connection devices and obvious grounding marks. 7.2.%, the insulation resistance between the power supply line and the machine shall not be less than +5MH. 7.2.9 The resistance between the power supply line and the machine housing shall be able to withstand the alternating current of nearly 5JH and 17SUV. The resistance test lasted for 1min without breakdown or flashover.
7.3 Steel parts and castings
7.3.1 The grade and mechanical properties of steam cast iron shall comply with the provisions of 439. 7.3.2 The selection of materials for parts shall comply with the provisions of GB221. Its mechanical properties shall comply with the provisions of GB221.7.3.3 The parts shall not have defects such as cracks, looseness and lack of porcelain. If there are pores, shrinkage and fall limit, which do not affect the strength of the components, welding and repair are allowed. The requirements for welding and repair are in accordance with the provisions of GB9439. 7.3.4 The casting control poem avoids bias and meets the provisions of GB6414. 73.5 The welding cost of the finished metal shall comply with the provisions of J3/T5943. 7.3. The mechanical mail and bottom shall comply with the provisions of E/TG. 7.4 Parts
7.4.1 Fixing blades
7.4.1.1 The blade seat should be flat and smooth. 7.4.1.2 The blades should be made of stainless steel with high strength or hot-stamped. The tolerance of the central angle 50 should comply with the grade standard of B11335.
7.4.1.3 The blades should be connected with the shaft: they can be tilted automatically. The blades should be on the shaft. It is condensed and radially distributed. 7.4.1.4 When assembling the fixed blades, the spacing between the blades shall comply with the requirements of the drawing. 7.4.3 The second stage head of the belt conveyor is not allowed to have gas-induced cracking. 7.4.2.2 The verticality tolerance of the end of the shaft and its push line shall comply with the requirements of the 6th grade donation in GB/1184. 7.4.3 + shaft paper parts
7. 4. 3.1 The above case uses 20 7.43.2 The beating tolerance of the two flanges shall meet the requirements of CBT1148 grade precision. 7.4.3.3 The straightness of the drawing shall not exceed .35mm per meter, and the opening between the parts shall be kept low and in accordance with the raw material potential. 7.4.4 The wide speedometer shall be driven by a helical gear. All the gears shall be hard geared and designed and manufactured in accordance with the requirements of the drawings. The normal operation of the speed reducer shall be low noise. 7.4.5 Drive system 7.4.S.1 The rated power of the motor shall support 100 1.2 times of the designed output power. 7.4.5.2 The actual drive installation should be equipped with a certified electrical protection to ensure safety. 7.4.5.3 The motor external expansion protection level should comply with the provisions of GR4942.1P54. The motor should be of industrial type. The drive installation should ensure that the operation is active, stable, reliable and noiseless. 7.4.5.41
7.4.5.5. Check that all lubricating parts in the drive installation have good traceability, and ensure that the seal is reliable and there is no oil leakage: 7.4.6 Electrical control system
JB/T8700—1996
7.4.%1 The electrical control equipment shall comply with the provisions of [B4720, 7.4.6.2 The electrical control system shall be equipped with switches, buttons, alarms and work lights necessary for the operation of the gas machine, 7.4.6.3 The electrical control system shall have anti-smell, anti-spreading and dustproof channels, and the components in the box shall be arranged neatly and the wiring shall be clear. 7.4.7 Assembly
1.4.7.! When assembling the gas machine, it shall be ensured that all components are strictly in accordance with the design requirements to ensure the overall smooth operation and reduce the risk of material jams. Ensure the product is reliable. 7.4.B Anti-corrosion
7.4.8.1 The shaft surface of the aerator shall be treated with zinc or green varnish. 7.4.8.2 All parts that have been treated with anti-corrosion treatment shall be sandblasted to remove hair, emulsified skin, collar cut, silicon and other dirt, and ensure the surface is flat and smooth. The surface of the painted object shall meet the design requirements. The paint film shall be free of bubbles, needles, wrinkles, sags and other defects. 7.4.9 Lubrication
7.4.9.1 The lubricating parts shall be in good condition, well sealed and not leaking. 7.9.2 The lubricating parts shall be clearly marked and can be easily lubricated. 8 Test method
8.1 Detection of degassing machine error index
8. 1. 1 Test conditions
The degassing machine can be arranged in the oxygen trench, and the shape is shown in Figure 3. The test equipment includes: degassing machine, power device, transmission device, and the speed ratio can be changed to adjust the speed.
4AHE solution measurement point, namely, surface C flow determination section ticket gas: 2-pull effect collection, 3-combination machine: 4-motor, 5-a chemical Figure 3 test device
8. 1. 2 Detection instruments and 1. System
Dissolved oxygen meter, recorder, moment meter, rotation meter, gas bottom dry meter, water level meter and flow meter, etc. 8.1.3 Test method
1.31 Test process
1) Fill the slurry tank with oil and set the dissolved gas concentration at fixed sampling points. For small-volume pools, three sampling points are recommended (see letter 4). For pools with human access, more sampling points should be set. When the number of points is treated, the average value of dissolved oxygen values at these points is used for calculation.
Figure 1: Water level, submerged depth of the blades of the aerator: JB/T87001998
Determination of positive oxygen content in water Deoxygenation. According to the deoxygenation concentration in water, add iodine and fluoride to deoxygenate: A section RB surface
Figure 4 Take the point change
Gradually deoxygenate and determine the oxygen concentration, measure the temperature, start the air compressor and record the change of oxygen concentration at each point in the water at different times and measure the torque and motor power;
Measure the flow rate at the designated section (see Figure 3), and measure the average flow rate of nine points on the section. The average value of the nine points is calculated (see Figure 3). The measured flow rate is the average flow rate:
is the point
Figure 5 Distribution of flow measurement points
@ When the deoxygenation value is close to or close to saturation, measure the torque again, and input the power of the machine, water temperature, atmospheric pressure, and the average value of the two changes before and after is used in the calculation;
@ Change the speed of the air compressor and the water depth, and repeat the step. 8. 1. 3. 2 Selection of the draught section
In the test pool, there are some restrictions on the length, width and depth of the ditch. The flow in the ditch is relatively complex. When selecting the sample flow section for measurement, it is necessary to select the section with relatively stable flow and minimum flow velocity. The shaft power of 8, 1, 4 is calculated by measuring the noise of the shaft. The calculation formula is:
N1.047X10Mn
shaft power,
auxiliary power transmitted, N·:
light selection, /trin.
9.1.5 Charging capacity and dynamic efficiency
Use the stage mass transfer model to calculate the total oxygen transfer coefficient (C-
JB/F8700—1998
The variation of the solution load with time, mg/(Lmin); total oxygen transfer coefficient, min1:
Saturation solution value, m6/;
Compound oxygen value at the time of pressure change, mg/L,
Use the calculus and linear regression method to calculate the oxygenation capacity and dynamic efficiency of the horizontal axis inflator at a certain speed and water separation: Charging capacity = K{T)×1.024\.C(20)V/kg0/(mh) *Power efficiency - (1.024c(2c)W/xG0/kg0/kw.) Formula: K(T) - total load transfer coefficient at temperature T, m,2C)... Deoxygenation value in water at 20C mg/I Station test water relaxation effective volume
Effective length of the transfer, m:
-consumption axis ice science kw.
Substitute a certain transfer depth into a formula (that is, the promotion: PC
Where -
Effective volume of test device
Average flow velocity in the ditch section m/s2North 3m/s): 0.3./N
——Transfer version right effective K degree n
8.3 Other items monthly inspection
Give reduction items on the day, station and judgment regulations table 2.0
Inspection rules
9.1 Inspection agent signing
According to the different inspection purposes and requirements, the factory shall conduct a planned inspection of the product outside the factory. 9.2 Factory Inspection
9.2.[11 Inspection items
The factory shall formulate and prepare the technical documents for each gas-fired system component and the accompanying materials, and list the inspection items, methods and judgment rules
Special inspection items
The gas-fired system System
disease prevention included
assembly
fixed
flange
"work condition
empty||and||swelling
determined
tools and methods
dividing
water column
production
4720,1 measurement
use
cup||caliper
measurement
weight||tools
mouth
special||measurement
determined basis
. n.E
7. 2 6,7. 2. 7,7. 2. 8.
Test all targets
more departments
Runze Dongning
Angstrom connection
safety
9.2.2 out! Inspection items JA/T 87001998 Working state No-load and full-load meter Differences and methods Monthly test, instrument V megohmmeter to check the machine and ground voltage, the machine is limited to the items listed in Table 3, the inspection table 3 shows the inspection and classification, the whole decision, use the measuring tool, only the device inspection, empty test and model load test under three conditions 9.3 Type inspection, 3. 1 Type inspection parts
Total based on
.>.$.4.3.4
Factory standing full month
7.3.5.7. 4.1.7.4.5,7.4.5,7.4.4,7.4.6,7.4. 5.7.+.77. 4. 57. J. 7
Any machine that meets any of the following conditions shall be subject to type inspection: a) new product identification; b) product transfer; 2) suspension of production for more than 2 years; d) changes in product design, structure, process, etc. after normal production that affect product performance (only the affected items shall be inspected); 3) the national quality supervision agency shall make requirements for the specifications, 9.3.2 Type inspection items
Type inspection is the main content of Chapter 1 (Technical Requirements) of this standard. 9.4 The products for type inspection shall be selected from the samples that have passed the inspection, one at a time. If there are items not included in the type or specification, it is allowed to The product shall be retested once after evaluation and adjustment. If it fails, it shall be judged as unqualified. Before the product is released, it shall be inspected by the inspection department: it can only be released after it is qualified and the agricultural product certificate and inspection personnel are numbered! 10 Marking, packaging, transportation and storage
10.1 Marking
10.1.1 The machine shall place product labels, trademarks and production licenses in obvious positions: 1D.1.2 The form, size and technical requirements of the product label shall comply with the provisions of GB/T13306, and the following basic contents shall be marked: a) Product name, number and size: b) Motor power,
) Machine quality:
d) Overall dimensions,
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