Sludge ceramsite is an artificial lightweight coarse aggregate. Due to its light weight, high strength and thermal insulation properties, it is a new type of building material with development potential. The modified sludge can be made into ceramsite as a building material. The preparation of sludge ceramsite is the use of clay and slag as […]
Anaerobic digestion of sludge refers to the process of decomposing biodegradable organic matter in sludge into carbon dioxide, methane and water by facultative bacteria and anaerobic bacteria under anaerobic conditions to stabilize the sludge. It is one of the commonly used means of sludge reduction and stabilization. Anaerobic digestion of sludge has the advantages of […]
The new dry-process cement production line technology was developed in the 1950s. So far, in Japan, Germany and other developed countries, the production rate of new dry-process cement clinker with suspension preheating and pre-decomposition as the core accounted for 95%. A suspension preheating and precalcining kiln was commissioned in 1976. The advantages of this technology: […]
At present, the treatment and disposal technology of sludge mainly refers to the processing of concentration, regulation, dehydration, stabilization, drying or incineration of sludge to achieve sludge reduction, stabilization and harmlessness. At present, the commonly used sludge treatment and disposal technologies include anaerobic digestion technology, aerobic fermentation technology, deep dehydration technology, thermal drying technology, lime […]
During long-term use of oil tanks, colloids, asphaltenes, high-melting waxes and entrained impurities (such as sand, heavy metal salts, mud, etc.) in crude oil and oil will slowly settle with water. Accumulated in the bottom of the tank to form a thick layer of black gelatinous material called tank bottom sludge. The production and accumulation […]
In recent years, China’s urbanization has developed at a rapid pace, and the urban population has increased year by year. The resulting urban sewage discharge has been increasing year by year, resulting in an increase in the output of urban sewage sludge. China is an industrial power and is now promoting energy conservation and environmental […]
The damage of the refractory lining of the rotary kiln often affects the continuity of production. It is one of the common equipment accidents. The causes of the defects include design structure, refractory quality, masonry quality and operation and maintenance. A comprehensive analysis of various lining damage accidents is conducive to identifying some common causes, […]
Oil sludge industry and calorific value analysis Oil sludge type Industry Heat Value Vad Aad FCad MJ/kg Refinery water treatment station sludge 23.44% 11.72% 2.28% 10.55 Oil field sludge 23.68% 38.65% 2.06% 7.97 Petrochemical plant tank bottom sludge 51.96% 10.42% 3.31% 25.55 Liaohe mixed sludge 66.61% 3.77% 4.49% 31.48 It can be seen from the […]
Oil sludge type Moisture content Oil content Slag content Refinery water treatment station sludge 62.56% 21.47% 15.97% Oil field sludge 35.62% 20.79% 43.59% Petrochemical plant tank bottom sludge 34.31% 54.42% 11.27% Liaohe mixed sludge 25.13% 70.69% 4.18% It can be seen from the content of the three-phase components of the oil sludge in the above […]
(1) Method for determining heavy metal content of oil sludge The content of heavy metals in oil sludge was determined by inductively coupled plasma mass spectrometry after atmospheric pressure digestion; the digestion procedure of sludge was referred to CJ/221-2005 municipal sewage treatment plant sludge test method. (2) Analysis method of oil phase components of oil […]