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NB/T 34035-2020: (Technical conditions for small biomass boilers)
Status: Valid NB/T 34035: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| NB/T 34035-2020 | English | 229 |
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(Technical conditions for small biomass boilers)
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NB/T 34035-2020
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| NB/T 34035-2016 | English | 279 |
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Specification for small biomass boiler
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NB/T 34035-2016
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PDF similar to NB/T 34035-2020
Basic data | Standard ID | NB/T 34035-2020 (NB/T34035-2020) | | Description (Translated English) | (Technical conditions for small biomass boilers) | | Sector / Industry | Energy Industry Standard (Recommended) | | Classification of Chinese Standard | F13 | | Word Count Estimation | 10,179 | | Date of Issue | 2020-10-23 | | Date of Implementation | 2021-02-01 | | Older Standard (superseded by this standard) | NB/T 34035-2016 | | Regulation (derived from) | National Energy Administration Announcement No. 5 of 2020 | | Issuing agency(ies) | National Energy Administration | NB/T 34035-2020: (Technical conditions for small biomass boilers)---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.
Specification for small biomass boiler
Energy Industry Standards of the People's Republic of China
Replace NB/T 34035-2016
2020-10-23 released
2021-02-01 implementation
Issued by the National Energy Administration
1 Scope...1
2 Normative references...1
3 Terms and definitions...1
4 Model representation...1
5 Fuel requirements...2
6 Technical requirements...2
7 Test method...5
8 Inspection Rules...5
9 Packaging, labeling and accompanying documents...6
10 Installation and use requirements...6
References...7
Foreword
This document starts from the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
grass.
This document replaces NB/T 34035-2016 "Technical Conditions for Small Biomass Boilers". Compared with NB/T 34035-2016, except for the structure
In addition to adjustments and editorial changes, the main technical changes are as follows.
a) Added fuel requirements (see Chapter 5);
b) The thermal performance index has been revised (see 6.1, 5.1 of the.2016 edition);
c) Modified the air pollutant emission indicators (see 6.2, 5.2 of the.2016 edition);
d) The inspection rules have been revised (see Chapter 8, Chapter 7 of the.2016 edition);
e) Modified the installation and use requirements (see Chapter 10, Chapter 9 of the.2016 edition).
This document was proposed by the China Rural Energy Industry Association.
This document is under the jurisdiction of the Energy Industry Rural Energy Standardization Technical Committee (NEA/TC8).
This document is organized and drafted by the Civil Cleaning Stove Professional Committee of China Rural Energy Industry Association.
Drafting organizations of this document. Jilin Enric Energy Technology Development Co., Ltd., Zhejiang Juneng Boiler Manufacturing Co., Ltd., Shandong Duoxin
Energy Technology Co., Ltd., Shandong Qihao Environmental Protection Technology Co., Ltd., Shandong Chaowan Heating Equipment Co., Ltd., Planning and Design of the Ministry of Agriculture and Rural Affairs
National Engineering Research Institute, Agricultural Ecology and Resources Protection Station of the Ministry of Agriculture and Rural Affairs, Beijing Zhongyan Environmental Energy Environmental Technology Testing Center, Beijing University of Chemical Technology, National
Wangjibei Electric Power Co., Ltd. Electric Power Research Institute, Beijing Future Blue Sky Technology Co., Ltd., Jiangsu Qianyuan Thermal Energy Technology Co., Ltd., Beijing
Huaye Sunshine New Energy Co., Ltd., Shandong Zhengxinde Environmental Technology Development Co., Ltd., Shijiazhuang Chunyan Heating Equipment Co., Ltd., Foshan
Huishengcai Electronics Co., Ltd., Shenghuo (Hubei) Agricultural Technology Co., Ltd., Yangxin County Limin Biomass Energy Technology Co., Ltd., Henan Giant
Feng Bioenergy Development Co., Ltd.
The main drafters of this document. Wang Gang, Ding Liming, Wang Feng, Gu Maosheng, Diao Xingsheng, Tian Yishui, Xu Wenyong, Yang Mingzhen, Xue Chunyu,
Li Peng, Zhang Jing, Hu Guang, Zhong Hongwei, Li Na, Li Fenglin, Xue Yonghong, Gao Hongliang, Zhang Debo, Gao Haihua, Li Huibin, Liu Guangqing, Ren
Yanbo, Wu Ting.
This document replaces NB/T 34035-2016.
The previous editions of this document and the documents replaced are as follows.
--NB/T 34035-2016;
--This is the first revision.
Technical conditions for small biomass boilers
1 Scope
This document specifies the model representation method, fuel requirements, technical requirements, and test methods for small biomass boilers (hereinafter referred to as boilers).
Inspection rules, packaging, marking and random documents, installation and use requirements, etc.
This document is suitable for burning biomass briquettes, using water as the medium, with a rated thermal power of not less than 0.05MW and not more than 0.7MW,
Small atmospheric hot water boiler with outlet water temperature not higher than 85℃. The small atmospheric pressure hot water boiler with biomass bundled fuel can be implemented with reference to this document.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated reference documents,
Only the version corresponding to that date is applicable to this document; for undated references, the latest version (including all amendments) is applicable to this document
file.
GB/T 700 carbon structural steel
GB/T 1576 Industrial boiler water quality
GB/T 8163 Seamless steel pipe for conveying fluid
JB/T 1626 Industrial Boiler Product Model Compilation Method
NB/T 34024 Biomass briquette fuel quality classification
NB/T 34036-2020 Test method for small biomass boiler
NY/T 1915 terminology of biomass solid briquettes
3 Terms and definitions
The terms and definitions defined in NB/T 34036-2020 and NY/T 1915 apply to this document.
4 Model representation
4.1 Coding
The boiler model is composed of three parts, which are composed of uppercase Chinese pinyin letters and Arabic numerals, and the parts are connected by horizontal lines (see
Figure 1), the contents of each part are as follows.
4.2 Other requirements
When the boiler body type and combustion method exceed the above range, the product model can be compiled by referring to the regulations of JB/T 1626.
5 Fuel requirements
5.1 The classification, grade division, performance index, inspection and testing of biomass briquettes shall meet the relevant requirements of NB/T 34024.
5.2 The fuel of the boiler should meet the basic requirements shown in Table 3.
6 Technical requirements
6.1 Thermal performance indicators
6.1.1 The manufacturer shall guarantee the rated thermal power of the boiler under the rated parameters and provide the economic operating load adjustment range of the boiler.
6.1.2 When the boiler uses fuel to meet the requirements of the design or order contract, and the equipment is in good condition and operates correctly according to the requirements,
The thermal efficiency of the boiler under rated conditions shall meet the requirements of Table 4.
Table 4 Boiler thermal efficiency
6.2 Air pollutant emission indicators
6.2.1 The emission limits of boiler air pollutants shall meet the requirements of Table 5.
6.2.2 The special emission limits of air pollutants from boilers in key areas shall comply with the regulations in Table 6.
Note. The geographical scope and time for the implementation of the special emission limit of air pollutants shall be stipulated by the environmental protection department of the State Council or the people's government at the provincial level.
6.3 Operational requirements
6.3.1 The temperature of the flue gas at the exhaust of the last heating surface of the boiler should not be greater than 160°C.
6.3.2 The boiler warranty period is 18 months from the date of leaving the factory. During the warranty period, the number of boiler shutdowns due to quality problems should not be more than 3 times.
6.4 Design requirements
6.4.1 The boiler should be reasonably designed, safe, stable and efficient in combustion, and easy to use and maintain.
6.4.2 According to the slagging characteristics of biomass fuel, the furnace flue gas temperature should be reasonably controlled, and necessary slag breaking measures should be taken.
6.4.3 The feeding device of mechanical combustion equipment should ensure smooth feeding, continuously adjustable, and independent secondary air inlet channels.
6.4.4 The boiler air distribution device shall have reliable structure, convenient operation and flexible adjustment, and the air pressure and air volume shall meet the requirements of full fuel combustion.
6.4.5 The heating surface should be arranged reasonably to form a good water circulation so that the heating surface of each part can be reliably cooled.
6.4.6 The boiler structure should have sufficient strength, rigidity and stability, and the nominal thickness of the boiler drum (shell) or furnace steel plate should not be less than 3mm.
6.4.7 The boiler should be easy to transport, install, operate, overhaul, drain, drain, and clean inside and outside.
6.4.8 The boiler air connecting pipe should be opened at the highest point of the boiler body and ensure direct air connection. The equivalent diameter of the boiler atmosphere connecting pipe should be
Calculated by formula (1), and should not be less than 25mm.
6.5 Manufacturing requirements
6.5.1 The materials and welding rods and wires of the main components such as the boiler body should have quality certificates. Steel plates for main components such as the boiler body
The quality should not be lower than the requirements of Q235 in GB/T 700, and the steel pipe material should not be lower than the requirements of No. 10 and No. 20 steel in GB/T 8163.
6.5.2 The length of the shortest section of the drum (shell) and furnace should not be less than 300mm, and each section of the drum (shell) shall have no more than two longitudinal welds.
And the length of the outer arc between the center lines of the two longitudinal welds shall not be less than 300mm.
6.5.3 The deviation of the butt joint edge of the circumferential weld shall not be greater than 10% of the plate thickness plus 1mm, and the deviation of the butt joint edge of the longitudinal weld shall not be greater than the thickness of the plate.
15%. The difference between the maximum diameter and the minimum diameter of the drum (shell) and furnace bladder on the same cross-section should not exceed 4mm, and the angularity should not exceed 3mm.
6.5.4 The head should be made of a whole piece of steel plate, and no more than two pieces should be spliced.
6.5.5 The bending radius of the pipe should not be less than 1.5 times the outer diameter of the pipe, and the deviation of the bending angle should not exceed 1.5°.
6.5.6 When the length of the pipe on the heating surface is not greater than.2000mm, a butt weld is allowed. When the length of the pipe on the heating surface is greater than.2000mm
When, two butt welds are allowed. When the pipe is spliced, the length of the shortest section should not be less than 500mm, and the deviation of the butt edge of the pipe should not exceed
Add 1mm to 10% of the wall thickness of the pipe.
6.5.7 The weld size should meet the requirements of the drawings and process documents.
6.5.8 When the welding environment temperature is lower than 0℃, welding should not be carried out without preheating measures. It should not be exposed in rain, snow, and fog.
Day welding. Before welding, oil stains, rust and other debris that affect welding quality should be cleaned up.
6.5.9 The height of the welding seam should not be lower than the base metal, and the transition with the base metal should be smooth.
0.5mm deep undercut.
6.5.10 The length of the pipe extending from the weld to the tube sheet. when the smoke temperature is greater than 600°C, the length of the extending weld should not be greater than 1.5mm;
When the smoke temperature is less than or equal to 600°C, the length of the welding seam should not be greater than 5mm, and the length of the pipe extending into the inner wall of the header should not be greater than 10mm.
6.5.11 The inclination, deflection and flange inclination of various pipe joints on the cylinder (shell), head and header shall not be greater than 2 mm.
6.5.12 After the boiler assembly is completed, a hydraulic test shall be carried out in accordance with the requirements of 7.4.After the test, the metal walls and welds of the pressure test parts shall be free of water droplets and water mist.
And no residual deformation was found.
6.6 Requirements for auxiliary machinery and accessories
6.6.1 The auxiliary equipment and accessories shall meet the product standards.
6.6.2 The noise of fans, water pumps and other equipment should meet their product standards.
6.6.3 The boiler should be equipped with high-efficiency dust removal facilities.
6.7 Functional requirements for detection and monitoring instruments and devices
6.7.1 The boiler should be equipped with indicating instruments for safe operating parameters such as pressure, water level and water temperature.
6.7.2 The boiler should be equipped with a rated outlet water temperature over-temperature device, and the boiler mechanical combustion equipment should also be equipped with a failure shutdown alarm and protection device.
7 Test method
7.1 Material inspection
Inspect the materials of the main components such as the boiler body and the quality certificates of welding rods and wires.
7.2 Welding quality inspection
The welding seam quality inspection adopts measuring tools and visual inspection methods.
7.3 Inspection of auxiliary machinery and accessories
Inspection of auxiliary machinery and accessories adopts visual inspection...
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