Best Practices
Steam System
Boiler with organic heat carrying agent
Adopting boiler with an organic heat carrying agent which replaces steam with thermally-conductive oil as transmission medium to provide heat energy for production lines. The oil is reheated after returning to the boiler. This change has lowered carbon emissions by more than five per cent or 57 tonnes annually.
Putian Xinfeitian Footwear Co., Ltd.Footwear manufacturing
Boiler - Heat recovery system
Boiler system: Installing a heat recovery system, converting energy from exhaust air using a heat exchanger to preheat boiler water.
Ningbo Daye Garden Machinery Co., Ltd.Machinery, equipment, apparatus, parts and components manufacturing
Collection of water condensate
Recovered water condensate from the laundry and dormitory steam system, saving 4,000 tons of steam and reducing annual carbon emissions by more than 1,800 tons.
ZhongShan Yida Apparel Ltd.Wearing Apparel Manufacturing Industry
Recovering energy from water condensate
Recovering energy from water condensate to preheat water in boilers, reducing energy consumed during the preheating process and hence lowering carbon emissions. The recovery system has saved annual oil consumption by 60 tonnes and has lowered energy consumption by 14%.
Jun Wei Apparel Co., Ltd.Wearing Apparel Manufacturing Industry
Heat recovery from steam and condensate
Installing a hot water tank and pipeline to utilize return steam and condensate water from garment dryers for heating water in washing machines, saving 14,700 tonnes of steam monthly.
Regent Garment Factory Ltd.Wearing Apparel Manufacturing Industry
“Circulating fluid bed” Boiler
Replacing its “chain grate boilers” with “circulating fluidized bed boilers” which have more efficient energy usage, desulfurization and NOx emission reduction capability
Dongguan Shatin Lake Side Textiles Printing & Dyeing Co., Ltd.Textile Industry
Boiler using natural gas
Changing the type of fuel used in their boiler from diesel to natural gas resulting in a reduction of annual carbon emissions by 142 tonnes.
Shenzhen Hong Tao Non-Woven Fabric Co., Ltd.Textile Industry
Replace steam traps in drying machines and steam irons
By replacing steam traps in drying machines and steam irons, minimizing boilers’ heat loss due to aging of the traps, reducing the number of operating boilers from two to one, resulting in an annual saving of 240 tonnes of fuel oil.
Jun Wei Apparel Co., Ltd.Wearing Apparel Manufacturing Industry
Electromagnetic wave scale deposit processor
Installing an electromagnetic wave scale deposit processor in boilers has reduced the deposit’s adhering to the inner wall of boiler pipes, thereby improving the energy efficiency of the boiler, resulting in carbon emissions reduction of 32 tonnes annually.
ZhongShan Yida Apparel Ltd.Wearing Apparel Manufacturing Industry
Heat insulated steam pipes
insulated its steam pipes to prevent heat loss
K+K Fashion Company LimitedWearing Apparel Manufacturing Industry
Installation of individual switches on washing machines’ steam pipes
Placed individual switches on its washing machines’ steam pipes to avoid unnecessary steam loss
K+K Fashion Company LimitedWearing Apparel Manufacturing Industry
Replacement of diesel boiler with natural gas-fired steam engines
Replacing a 2t/h diesel boiler with two 0.6t/h natural gas-fired steam engines. These are more efficient and have reduced annual natural gas consumption by about 65,000 m3
Jiangmen Anotech Cookware Manufacturing Company Ltd.Fabricated Metal Industry
Retrofitting thermal insulation on steam pipelines
Retrofitting thermal insulation on steam pipelines in workshops, using aluminium silicate fibre wool and rock wool with coloured steel plate wrapping. These substances are excellent thermal insulators, as well as being aesthetically pleasing and durable. Energy and steam loss from the pipes was reduced from 30-40 per cent and 15 per cent per kilometre before the retrofit, to 15-20 per cent and 6 per cent per kilometre after the retrofit. This has saved 36,800 tonnes of steam and lowered carbon emissions by about 9,627 tonnes annually.
Dongguan Shatin Lake Side Textiles Printing & Dyeing Co., Ltd.Wearing Apparel Manufacturing Industry
Installation of modern boiler with economiser
Planning to replacing current steam boilers with modern ones that include an economiser, achieving an overall heat efficiency of 93% and reducing natural gas consumption by 17%. This will save 1.55 million m3 of natural gas per year and lower annual carbon emissions by 3,246 tonnes
Queen South Textile Mills LimitedWearing Apparel Manufacturing Industry
Installation of waste heat recovery devices in generators and boilers
Installing waste heat recovery devices in generators and boilers. In natural gas generators, the devices transfer waste heat at 400°C to the boilers used for ironing. The boilers’ economisers then recover residual heat in the flue gas, which is then used for pre-heating. This recovered heat supplies more than 90% of the heat needed for ironing – about 30% of CMBD’s total operational energy. This reduces boiler diesel costs by about US$216,000 and cuts carbon emissions by 750 tonnes annually.
Crystal Martin Apparel Bangladesh Ltd.Wearing Apparel Manufacturing Industry