Entries by LCDRI

Analysis of related technologies and advantages and disadvantages of sludge treatment and disposal

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 […]

Overview and classification of oil tank bottom sludge

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 […]

Status of urban sewage sludge and industrial sludge treatment

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 […]

Cause analysis and countermeasures for damage of refractory lining of cement rotary kiln

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, […]

Analysis of industry, element and calorific value of oil sludge

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 […]

Three-phase analysis of water, oil and slag of oil sludge

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 […]

Analytical method for heavy metal content of oil sludge

(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 […]

Industrial, elemental and calorific value analysis methods for oil sludge

(1) Industrial analysis of oil sludge The industrial analysis method of oil sludge adopts the industrial analysis method of GB/T 212-2008 coal. Since the water content has been obtained by distillation, the ash content, volatile matter content and fixed carbon content of the sample are determined only by this method. Ash calculation formula for oil […]

Cement kiln co-processing hazardous waste in the engineering design needs attention

As a new type of hazardous waste disposal technology, cement kiln co-disposal of hazardous waste has many advantages such as high disposal rate, high disposal volume, environmental protection emission standards, various types of disposal, low project investment, short construction period and low disposal cost. Gradually gain wide recognition. In recent years, especially in 2017 and […]

Regulations for homogenization, storage and kiln production in cement plant design

The degree of homogenization of raw materials and raw materials in cement plants is an important factor in determining the quality of the final product. In order to make full use of low-grade limestone, expand the raw material resources and improve the quality of clinker, modern cement factories attach great importance to the pre-homogenization of […]