clinker production;clinker;refuse-derived fuel

Categories:
Categories:
Unit processes/Materials production/Inorganic chemicals
Location:
ZZ-SD-CN
Reference year: -
Description

According to the Beijing Regulations on Domestic Waste Management (Beijing municipal commission of housing and urban-rural development, 2021), domestic waste was classified as food waste (FW), residual waste (RW), recyclable and hazardous waste. Converting domestic waste into refuse-derived fuel (RDF) as an alternative fuel for clinker production.The RW was divided into two parts with a sifter. The oversize mainly contained light combustibles, such as paper, plastic, and wood. They were crushed and compressed with 5% lime to make the refuse-derived fuel (RDF CDW), which was used as an alternative fuel in the cement kiln to replace part of the coal. The undersize mainly consisted of incombustible, such as lime soil, bricks, ceramics, glass, and metals, which were fed into the raw meal mill after being crushed. The FW was pre-homogenized with crushed limestone and then entered into the batching system. It has also been used as the alternative raw material. There was no drying for FW because its moisture was just utilized by limestone pre-homogenization. Clinker production in scenario 4 used limestone, sandstone, shale, iron powder, the undersize of RW and FW as raw materials, and used coal and RDFCDW as fuels. Coal ash and RDF CDW ash were also used as raw ma terials. The clinker quality parameters, thermal substitution rate (TSR), and proportion of alternative raw materials in the raw meal were considered as constraint conditions to adjust the material usage. The power consumption in each stage was calculated based on the electricity consumption index for cement production. Users of this data set should ensure that they account for the energy content and combustion characteristics of the RDF when substituting for traditional fuels in the cement kiln process. The quality parameters of the clinker, such as the lime saturation coefficient (KH), silicate modulus (SM), and aluminate modulus (IM), and thermal substitution rate (TSR) should be monitored and kept within specified limits to prevent any adverse effects on clinker quality. It is also vital to incorporate and adjust the raw materials' consumption, particularly the proportions of the alternative raw materials in the raw meal, as this impacts the overall material usage and energy efficiency of the process. Users should calculate the electricity consumption at each stage of production based on the electricity consumption index for cement production and take into consideration that wastewater generation is negligible in this process. Inclusion of environmental emissions or waste products in the assessment should be in line with the system boundaries stated: pulverized coal preparation, raw meal preparation, and clinker calcination.

Technology

In scenario 4, the RW was divided into two parts with a sifter. The oversizemainly contained light combustibles, such as paper, plastic, and wood. They were crushed and compressed with 5% lime (Li, 2017) to make the refuse-derivedfuel (RDF CDW), which was used as an alternative fuel in the cement kiln to replace part of the coal. The undersize mainly consisted of incombustible, such as lime soil, bricks, ceramics, glass, and metals, which were fed into the raw meal mill after being crushed. The FW was pre-homogenized with crushed limestone and then entered into the batching system. It has also been used as the alternative raw material (Cai et al., 2014). There was no drying for FW because its moisture was just utilized by limestone pre-homogenization (Cai et al., 2015). Clinker production in scenario 4 used limestone, sandstone, shale, iron powder, the undersize of RW and FW ( ́ Swiechowski et al., 2020) as raw materials, and used coal and RDFCDW as fuels. Coal ash and RDF CDW ash were also used as raw ma terials. The clinker quality parameters, TSR, and proportion of alternative raw materials in the raw meal were considered as constraint conditions to adjust the material usage (Cai et al., 2015). The power consumption in each stage was calculated based on the electricity consumption index for cement production(Cai et al., 2015; Wang, 2013; Li, 2017).

Process type
Unit
LCI modeling approach
Unknown
Multifunctional modeling
NONE
Format
ILCD
Aggregation type
HORIZONTAL
Data provider
TianGong
Review status
Internal
Cost
Free
Contact
Tiangong LCI Data Working Group