Experimental researches on poultry manure combustion in co-combustion with biomass

Abstract

Combustion of pure avian waste is strongly affected by its humidity content. According to the results of composition analysis, the initial humidity reaches up to 50%, inhibiting direct combustion initiation and development. Drying of poultry waste is an alternative, but simple relatively long-term storage or thermal pre-processing, complicates the technological process of energy recovery and increases the associated costs. Co-combustion represents a promising solution to enrich the heating value of raw poultry manure. Experiments using biomass (in a mass fraction of up to 30%) led to positive results in terms of efficiency. It is highlighted that the process depends on the quality of the woody biomass used for the mixture, but also on its bulk density, which causes an accelerated diffusion of air and influences the burning speed. This paper presents the experimental investigations on the co-combustion of poultry manure and woody biomass, performed on a 55 kW pilot boiler equipped with a post-combustion grate. The focus of the analysis is on the influence of the biomass bulk density and its heating value on the co-combustion process. The results obtained favor the development of a technology that is easy to apply and has a reduced cost. The technology investigated here is suitable for onsite applications in poultry farms, enabling meeting the energy demand based on co-combustion of resulting poultry waste.

Possibilities of Climate Control of Poultry Complexes through Co-Combustion of Poultry Waste–Solid Biomass for Agriculture in Romania

“…Figure 2 shows the experimental test rig used for performing the envisaged tests, with the pilot boiler equipped with all the measuring and control devices [2,37,42].…”

Particularities of flue gases from energy installations on the process of continuous flow capture for CO2 by direct methanation

“…Conceptually, replacing the CO2 component in flue gas with methane (CH4) does not solve the pollution problem. For energy installations, this seemingly useless conversion for environmental protection, leads to a significant reduction in CO2 emissions into the atmosphere [3] by using cascade recombustion.…”

“…In the following paragraphs, the flue gases composition depending on the type of hydrocarbon, starting from the lower calorific value, 𝐻 𝑖 𝑖 in MJ/kg or MJ/m N 3 is presented. The actual volume of the flue gas is: 𝑖 the calculation relations lead to [3], [6], [7]:…”

“…For continuous processes, carried out by directly coupling the methanizer to the flue gas outlet, inserting a compressor (figure 1) makes it uneconomical since it requires operation at a reduced pressure. As a result, the considered energy installations (EI) will only operate on sulphur-free gaseous or liquid fuels [3].…”

“…According to [3], [4], [5], the following are to be noted regarding the existence of water vapor and oxygen:…”