HG/T 21548-1993 Radial Flow Secondary Sedimentation Tank Suction Machine Standard Series HG/T21548-1993 Standard Download Decompression Password: www.bzxz.net

Industry Standard of the People's Republic of China
HG21548-93
Radial Flow Secondary Sedimentation Tank Suction Machine
Standard Series
1993-07-13 Issued
1993-11-01
Ministry of Chemical Industry of the People's Republic of China
Industry Standard of the People's Republic of China
Radial Flow Secondary Sedimentation Tank Suction Machine
Standard Series
HG21548-93
Editor: Jilin Chemical Industry Company Design Institute Approved by: Ministry of Chemical Industry
Effective date: November 1, 1993
Editing Center for Engineering Construction Standards of the Ministry of Chemical Industry
Document of the Ministry of Chemical Industry
Chemical Industry Development (1993) No. 525
Notice on the approval of the "Standard Series of Radial Flow Secondary Sedimentation Tank Suction Machine" as a chemical industry standard
To the chemical industry departments (bureaus, head offices) of all provinces, autonomous regions, municipalities directly under the Central Government, and cities with independent planning status, and all relevant design units: The "Standard Series of Radial Flow Secondary Sedimentation Tank Suction Machine" organized by the Environmental Protection Design Technology Center of the Ministry of Chemical Industry and edited by the Design Institute of Jilin Chemical Industry Company has been reviewed and approved as a chemical industry standard. The number is HG21548-93 and will be implemented from November 1, 1993.
This standard is managed by the Environmental Protection Design Technology Center of the Ministry of Chemical Industry and published and issued by the Editing Center for Engineering Construction Standards of the Ministry of Chemical Industry.
Ministry of Chemical Industry
July 13, 1993
General provisions
Scope of application
Structural type
1.3 Series parameters
1.4 Materials
Marking method
Safety measures
1.8 Power supply
1.9 Reference standard
2 Series structural dimensions
Selection instructions
Compilation instructions
1 General provisions
1.1 Scope of application
The sludge suction machine in this standard series is a special equipment for the flow-type secondary sedimentation tank of sewage treatment construction. According to the sewage treatment water volume and process requirements, the appropriate sedimentation tank diameter and depth can be selected. The maximum sludge discharge volume of the secondary sedimentation tank is designed according to 100% of the single tank treatment water volume.
1.2 Structural type
1.2.1 Sedimentation tank structure
The sedimentation tank structure of this standard series is a flat-bottomed circular tank. The water inlet system consists of a central water inlet shaft and a water distribution system, and the sludge is discharged from the central sludge discharge pipe.
1.2.2 Suction machine structure
According to the driving mode and structural characteristics of the suction machine, it is divided into two types: the central drive double-arm suction machine is type A, and the peripheral drive single (double) arm suction machine is type B. The transmission system of the type A suction machine adopts a two-stage cycloid pinwheel reducer and a large roller slewing bearing with external teeth for three-stage reduction. The sludge inlet section of the suction pipe is rectangular. Each suction pipe is directly connected to the central mud tank, and a flow regulating valve is provided at the sludge outlet of the suction pipe. The type B suction machine adopts a single-arm structure when the pool diameter is 40m, and a double-arm structure when the pool diameter is >40m. The transmission system uses a two-stage planetary cycloidal pinwheel reducer and an open sprocket three-stage reduction walking roller using cast steel rubber wheels, the center support uses a large roller slewing bearing, the sludge inlet section of the sludge suction pipe is rectangular, the sludge suction pipe of the single-arm sludge suction machine is connected to the central mud tank, the sludge suction pipe of the double-arm sludge suction machine is connected to the mud discharge trough, and the mud discharge trough is connected to the central mud tank. A flow regulating valve is provided at the sludge outlet of the sludge suction pipe. Both A and B type sludge suction machines are equipped with scum scrapers, scum baffles, annular triangular weir water collection troughs and slag buckets. 1.2.3 Sink structure type
The water collection trough structure is divided into three types according to the size of the pool diameter Φ: pool diameter <21m is type 1, 25m<<45m is type 1, $45m is type 1+I. Type 1 sump is an annular sump located outside the periphery of the sedimentation tank, Type 2 sump is an annular sump located inside the tank at a certain distance from the periphery of the sedimentation tank, and Type 10 sump is a combination of Type 1 and Type 2 sump (see Figure 2.0.2). 1.3 Series parameters
1.3.1 The process parameters of the secondary sedimentation tank equipped with Type A and Type B sludge suction machines are shown in Table 1.3.1. 1.3.2 The main parameters of Type A and Type B sludge suction machines are shown in Table 1.3.2. 0059
(uru）
cu/ew)
（）d
000000
000000
The sludge suction pipe, bolts and nuts of the underwater part are made of stainless steel, the triangular weir, the annular sump inside the tank and the slag baffle are made of fiberglass, and the rest of the materials are carbon steel. 1.5 Marking method||tt ||1.5.1 Marking of Type A central drive dredger
Depth of sedimentation tank (m)
Diameter of sedimentation tank (m)
Central drive
Dredge code
1.5.2 Marking of Type B peripheral drive dredger
Depth of sedimentation tank (m)
Diameter of sedimentation tank (m)
Peripheral drive
Dredge code
1.6 Safety measures
When the dredger encounters an overload during operation, the overcurrent protection facility will cut off the power supply and stop the equipment from operating. 1.7 Anti-
The carbon steel parts above the water are coated with epoxy asphalt paint, and the carbon steel parts under the water (including the range of 300mm above the water surface) are coated with inorganic zinc-rich paint.
1.8.1 The power control lighting cable of Type A central drive dredger is passed through a steel pipe along the The number of devices under the table. 1.8.2 The power control and lighting power supply of the Type B peripheral transmission dredger share two 7-core cables. The cables are protected by DN25 steel pipes. The cable protection pipes are pre-buried in the bottom of the secondary sedimentation tank and the central water inlet vertical concrete shaft wall (see Figure 2.0.1-3). 4
1.8.3 In order to prevent the dredger from being damaged due to mechanical overload during operation, an overcurrent relay quick-break protection is added to the motor control circuit, and its setting value is 2 to 3 times the normal operating current. 1.9 Reference standards
JG2300
JB2839
"Classification and Technical Conditions of Carbon Steel"
"Basic Types and Dimensions of Weld Bevels for Gas Welding, Manual Arc Welding and Gas Shielded Welding" "Slewing Bearing"
"Herringbone Brush Holder and Collector Ring"
JB8 "Product Label"||tt ||Q/ZB76 "General Technical Conditions for Assembly"
Q/ZB77
"General Technical Conditions for Painting"
Q/ZB78. "General Technical Conditions for Packaging"
2 Series Structural Dimensions
2.0.1 Installation conditions of type A sludge suction machine and structural dimensions of secondary sedimentation tank are shown in Figure 2.0.1-1; installation conditions of type B sludge suction machine and structural dimensions of secondary sedimentation tank are shown in Figure 2 .0.1-2, 2.0.1-3. 2.0.2 See Figure 2.0.2 for the structure of the sedimentation tank sump. 2.0.3 See Figure 2.0.3 for the structure of the A-type central drive sludge suction machine. 2.0.4 See Figures 2.0.4-1 and 2.0.4-2 for the structure of the B-type peripheral drive sludge suction machine. 2.0.5 See Figure 2.0.5-1 for the electric control principle of the A-type central drive sludge suction machine; see Figure 2.0. 5-2 for the electric control principle of the B-type peripheral drive sludge suction machine.
3 Selection instructions
3.0.1 When selecting, according to the sewage treatment water volume, refer to the process parameter table 1.3.1 or according to the sewage treatment process parameters of different properties, and then determine the diameter, pool depth and structure of the selected sedimentation tank through calculation, and then fill in the required size content according to the marking method of 1.5.
Select water pipe
Reserved hole 120×120×300 (forest)
Embedded n holes in each layer-
Bolts + evenly distributed around the circumference
(thread length 30mm)
Surface reserved hole 150×150×400 (depth)wwW.bzxz.Net
(12 in total)
250250/250
Figure 2.0.1-1A type sludge suction machine installation conditions and secondary sedimentation tank structure size 8
Economic discharge port DN
Empty pipe
Type M10 explosion control
Open evenly distributed around the circumference (n)
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