GB/T 4750-2002 Standard Atlas of Household Biogas Digesters

This standard provides the design of construction of rural household biogas digesters and the selection of supporting technologies. This standard is applicable to the construction of household biogas digesters in various soil types and under different climatic conditions throughout the country. GB/T 4750-2002 Household Biogas Digester Standard Atlas GB/T4750-2002 Standard Download Decompression Password: www.bzxz.net

ICS 27. 180
National Standard of the People's Republic of ChinabZxz.net
GB/T4750~2002
Replaces GB/T 4760—1984
Standard Design Drawings for Household Anerobie Digesters
Coilection of Standard Design Drawings for Household Anerobie Digesters2002-07-02Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Implementation on 2003-01-01
GB/T4750--2002
In 1984, the former State Bureau of Standards issued G13/T4750-1984 "Standard Design Drawings for Rural Household Hydraulic Biogas Digesters". More than 10 years of practice have played a positive role in promoting the biogas construction in my country, but also found some areas that need to be improved. The expansion of comprehensive utilization of biogas has also put forward new requirements for the function, structure, components and construction technology of biogas tanks; the small-scale high-efficiency biogas tanks represented by meander distribution and commercialized reinforced concrete prefabricated slab construction technology developed in recent years also need to be absorbed and enriched. This standard retains the contents of GB/T4750-1981 that have been proven to be still suitable for my country's current reality, and revises and supplements the following important technical contents:
New design of new biogas tanks with meander distribution; ~-New design of prefabricated reinforced concrete upper plate assembly filling tank; New design of separation and storage gas flotation cover biogas discharge. In view of the fact that the technical content of this standard is no longer limited to "water pressure type", the name of the standard is changed to "Household gas flow standard atlas". This standard is used in conjunction with GB/T4752-2002 "Household gas pool construction operation procedures" and GB/T4751-2002 "Household biogas pool quality inspection and acceptance specifications".
Appendix A, Appendix B, Appendix C, Appendix D are all normative appendices. This standard is proposed by the Science and Technology Education Department of the Ministry of Agriculture. This standard was drafted by the Kunming Rural Energy and Environmental Protection Office, and the Ministry of Agriculture Biogas Research Institute, Chaobei Rural Energy Office, Jiangxi Rural Energy Office, and Hunan Rural Energy Office participated in the drafting. The main drafters of this standard are: Zhang Wanjun, Zheng Qishou, Kuang Yuancai, Xiong Chengshui, Fang Rensheng, Mi Jianxiang, Jin Xianguo, Ren Hong. This standard is entrusted to: Kunming Rural Energy and Environmental Protection Office is responsible for interpretation. The previous versions of the standards replaced by this standard are: 13/T 47301984. 1 Scope
Standard Atlas of Household Biogas Digesters
This standard provides the construction design of rural household biogas digesters and the selection of supporting technologies. This standard is applicable to the construction of household biogas digesters in various soils and different climatic conditions throughout the country. 2 Normative Reference Documents
GB/T 4750--2002
The clauses in the following documents become the clauses of this standard through the introduction of this standard. For any dated reference document, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For any undated referenced documents, the latest versions are applicable to this standard. GB/T47512002 General Biogas Digester Quality Inspection and Acceptance Specification GB/T4752--2002 Household Biogas Digester Construction Operation Procedure 3 Atlas Contents
This atlas mainly includes: household biogas digesters, color reinforced concrete slab assembly, round, spherical, separation and air flotation covers, etc. Appendix to the biogas digester standard. The movable cover design includes bottle stopper type, flat plate type, center tube type, etc., which can be selected by the user. 3.1 Meandering distribution biogas digester. It is mainly composed of a cylindrical tank body, a spherical shell tank arch, a 5° inclined bottom and a water pressure room. 3.2 Prefabricated reinforced concrete slab assembly biogas digester. Its structure is the same as the existing concrete meandering distribution biogas digester type A, but the construction process is different. 3.3 Circular arrow-shaped biogas digester. It is mainly composed of a cylindrical tank body, a spherical shell tank, a reverse spherical shell tank bottom and a circular water pressure room. 3.4 Elliptical biogas digester. It is mainly composed of a spherical fermentation room, a feed inlet and a rectangular water pressure room. 3.5 Separation gas storage flotation biogas digester, which is mainly composed of a cylindrical tank body, a spherical shell tank arch, a 5° inclined bottom, a gas storage flotation cover and a matching water seal tank. 3. 6 Appendix of the standard. Appendix A, Appendix B, Appendix C, Appendix D. 4 Selection conditions
This atlas is mainly applicable to the construction of ponds in rural households across my country. When selecting, the family members, convenience requirements, fermentation materials, gas production rate, topography, geology, groundwater level, pond construction materials, construction technology, etc. should be comprehensively considered. Reasonable selection of pond shape and pond diameter. 5 Foundation requirements
This atlas is applicable to the construction of ponds under the conditions of gravel, sand, powder, clay and artificial filling, as well as special foundation construction, and shall be carried out in accordance with the requirements of GB/T4752.
6 Pool construction materials
Cast-in-place concrete adopts C15; ordinary clay bricks adopt MU7.5 or above concrete precast slabs adopt C15; masonry mortar adopts MU7.5 or above inlet and outlet pipes adopt C2G concrete precast, or finished pipes can be used. Various movable covers and other covers are made of reinforced (steel wire lead wire) CI5 concrete. GE/T4750--2002
7 Sealing layer method
Making a good sealing layer is the key to ensure that the biogas tank is leak-proof and airtight, and its construction process must be strictly carried out in accordance with GB/T1752. 8 Main design parameters
8.1 Air tightness: When the design pressure in the tank is 8000 (or 4000) Pa, the 24h leakage rate is less than 3%. 8.2 Daily gas production per unit effective tank volume: When the fermentation process requirements and normal use conditions are met, the average daily gas production per cubic meter of tank volume is 0.20m3~0.40ml
8.3 The normal gas volume is 30% of the oral gas production. 8.4 Strength safety factor K≥2.65.
8.5 Normal service life is more than 20 years.
8. 6 Live load 2 kN/m
8.7 The design value of foundation bearing capacity is 50 kPa,
8.8 The normal working air pressure in the pool is ≤8000Pa, and those who use floating cover to purchase gas can choose ≥4000Pa. 8.9 The maximum air pressure limit in the pool is 12000Pa
8.10 The thinnest part of the pool arch cover is 2250mm
8.11 The maximum feed amount is 90% of the gas pool capacity. 8.12 Water pressure interval: The effective volume of the gas float is 50% of the daily gas production. 8.13 The geometric dimensions of the pool capacity of 6m and the gas production rate of 0.20m/(md) in this atlas are drawn in proportion. The dimensions of different parts of other 4m.8m10㎡ biogas pools are listed in table form. The dimensions not specified in the figure are in millimeters, and the elevation is in meters. 9 Safety measures
The new pools designed in this atlas all adopt new technical safety measures such as sloped bottom discharge, shallow pool body, movable cover, pressure limiting holes and covers at each opening. However, anti-coagulation design is not considered for biogas pools. When using and repairing biogas pools, strict fire prevention, explosion prevention and asphyxiation accidents must be prevented: people are not allowed to enter the pool during large discharge, and various simple dischargers can be used. 10 Quality inspection
The quality inspection and acceptance of biogas leakage shall be carried out in accordance with the requirements of G/T4751. 11Material legends, legend symbols. Common quantity namesMaterial legends, legend symbols, common quantity names are shown in Table 1, Table 2, Table 3Material charts
Material legends
Spontaneous combustion soil
Natural soil tamping
Sand, powder materials
Square stone, stone strip turning
Pulp grape pebbles
Material legends
Legend symbols
Table 1 (continued)
Table 2 Legend symbols
Legend symbols
(Literature description)
GB/T 4750—2002
Concrete
Steel Energy Concrete
Detailed drawing number, the number indicates the detailed drawing number
Detailed drawing reference. The number above the horizontal line indicates the detailed drawing number, the number below the horizontal line indicates the frame where the detailed drawing is located, "" indicates that the detailed drawing represents the same part in this drawing
indicates the part to be described by the text
The cutting surface position symbol, the thick solid line indicates the cutting position, the text indicates the section drawing number
The arrow indicates the radius+ indicates the size
indicates the water level, "√
Square hole
indicates the horizontal plane position
GB/T 4750—2002
Text code
12 Meandering distribution biogas tank
12.1 Features
12.1.1 Tank structure features
Table 3 Commonly used disk names
R.Ri.R...
B,B:,b,bj
Appropriate name
Pipeline diameter
represents the long and short semi-axis of the ball
circular diameter
The bottom discharge inlet is inclined toward the discharge outlet; the lowest point of the pool bottom is set at the bottom of the discharge room; under the action of the inclined bottom discharge, a certain flow thrust is formed to realize the self-flow of the main fermentation pool in and out, and all the liquid can be discharged from the discharge room without opening the skylight cover. Type B is equipped with a central inlet and outlet pipe and a plug plate. The central pipe is conducive to extracting or adding raw materials from the center of the main pool, and the plug flow plate is conducive to controlling the flow rate and retention period of the fermentation raw materials at the bottom, and has a bacteriostatic effect. Type C is equipped with a distribution plate, a central shell breaking gas transmission cage and a raw material pretreatment pool. These devices effectively increase the diffusion surface of new materials, give full play to the pool capacity, improve the gas production rate and extend the continuous operation cycle (with strict requirements on the quality and concentration of the liquid). 12.1.2 Fermentation process and its characteristics
12.1.2.1 Process flow
Select (cultivate) bacteria - prepare materials, feed → pile drive in the pool (adjust pH and concentration) → seal (start operation) daily management (feed in and out, reflux stirring).
12.1.2.2 Process characteristics
The fermentation raw materials are human, livestock and poultry feces; the continuous fermentation process can maintain relatively stable fermentation conditions, stabilize the biogas microorganism (bacteria accumulation) flora, maintain the gradual improvement of raw material digestion speed, improve raw material utilization and biogas tank load capacity, and achieve a higher gas production rate; the process itself has few glutinous materials, is simple and convenient, and easy to operate. 12.2 Design principle
12.2.1 Designed in accordance with the principle of "three combinations" (biogas tank, toilet, and painted deer are connected), round and simple pool body, spherical shell pool arch, inclined bottom, water pressure room, skylight, movable cover, inclined pipe feeding, bottom discharge, and each port is covered. The arch span ratio of the pool is f,/D1/5, the feed inlet and outlet of the pool bottom are inclined to the discharge outlet 5\, the pool tower height H=1. 0 m, and the geometric dimensions of the water pressure room are matched with the main pool volume production rate and the pool type and process requirements. 12.2.2 According to the drainage structure, it must meet the fermentation process flow, implement gravity inlet and mountain feed. Give full play to the drainage load capacity, control the retention period of raw materials, and improve the gas production rate. Type B and Type C are equipped with distribution boards, raw material pretreatment and other equipment. 12.2.3 Small capacity, less alkali, small footprint + small plastic and high efficiency: 12.2.4 Low cost, simple and easy management and operation, easy to promote. 12.3 Materials and Structures
The materials for the pool wall, pool arch, pool bottom, upper and lower sides of the gas pool are concrete water pressure tank. The circular structure is concrete GB/T 4750--2002.
The square structure is brick-built. The feed pipe is a round pipe. It can be cast in place concrete or concrete prefabricated pipe: the cover plates, central pipe, cloth plate, plug flow solid bacteria plate, etc. are reinforced concrete prefabricated plates. The central shell breaking gas transmission cage is a double-layer circular bamboo weaving. 12.4 Construction points
Overall cast-in-place large excavation formwork casting method: lay out the lines according to the drawings and dig out the entire pool earthwork. First, pour the bottom ring beam concrete, and then pour the pool wall and pool arch concrete. The outer formwork of the pool wall can use the original soil wall, and the inner formwork of the pool and pool arch can use steel formwork (if there is no steel formwork condition, brick formwork or wooden formwork can be used). The concrete pouring should be continuous, uniform and symmetrical, vibrated and compacted from bottom to top. The surface of the arch should be repeatedly compacted and smoothed with original slurry, and attention should be paid to maintenance (see GB/T 4752 for details).
12.5 Standard drawing of meandering distribution biogas pool
See Figures 1 to 9 for the standard drawing of meandering distribution biogas pool. GB/T 4750-2002
To9tztl
口楼品
生到控和阿神
口特港
nsr ie
000E=P
OS:保-
Qan“0于
09:1国通
GB/T 4750—2002
4A42277
GB/T4750—2002
ozeoek
口能#
00s 008
0007=P
BO路兰
0081910001009100010900702 00010911000T 008o10121 e0ta2oea2aroc0/0p
H hoet
08: 008 108
00tz=(
GB/T 4750—2002
全金会
（可）
家ST5 O0T
Building 915208
Shenzhen single dry demolition back
GB/T4750—2002
Chuangtan material
021--09
Guoran City1GuoTong
GB/T 4750—2002
4A42277
GB/T4750—2002
ozeoek
口能#
00s 008
0007=P
BO路兰
0081910001009100010900702 00010911000T 008o10121 e0ta2oea2aroc0/0p
H hoet
08: 008 108
00tz=(
GB/T 4750—2002
All Gold Club
Home ST5 O0T
Building 915208
Shendan Dry Dismantling Back
GB/T4750—2002
Chuangtan Material
021--09
Guoran City1GuoTong
GB/T 4750—2002
4A42277
GB/T4750—2002
ozeoek
口能#
00s 008
0007=P
BO路兰
0081910001009100010900702 00010911000T 008o10121 e0ta2oea2aroc0/0p
H hoet
08: 008 108
00tz=(
GB/T 4750—2002
All Gold Club
Home ST5 O0T
Building 915208
Shendan Dry Dismantling Back
GB/T4750—2002
Chuangtan Material
021--09
Guoran City
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.