In combination with actual operation conditions of 4 sets of CDQ systems which have representativeness domestically, the CDQ systems are studied from the aspects of measuring method and means, energy utilization efficiency, comprehensive evaluation of the systems and so on. When coke moisture content is reduced by about 4%, M40 is raised by 3%~4% and M10 is lowered by 1%; when the hot state property is raised, reactivity index is reduced by 5% and coke strength after reaction is enhanced by about 5%. In comparison with wet quenched coke, the true density of dry quenched coke has increased slightly, the anisotropic degree in coke optical contexture is strengthened, the anisotropic index is raised by 1.1% in average and porosity is lowered by 7.8%. The technology developing direction of domestic CDQ system and role and position of CDQ technology in energy-saving and discharge reduction are discussed.

 A study is carried out for the extraction residue from the supercritical methanolysis of lignite through proximate analysis, elemental analysis, ash composition analysis and calorific analysis. The results show that the water content of extraction residue from the methanolysis of lignite is 6.93%~11.35%, ash content is up to 22.10%~24.46% and volatile matter is 39.75%~45.53%. The extraction residue from the methanolysis of lignite has no caking and coking properties and its carbon content is 66.74%~76.03%； its hydrogen content is 4.51%~5.06%; its nitrogen content is 0.95%~0.99%; its sulfur content is 2.10%~2.57% and its oxygen content is 15.79%~25.13%；the C/H atomic ratios of extraction residue from methandysis of lignite are in the range from 1.214 to 1.302. The ash component of the extraction residue from the methanolysis of lignite contains mainly SiO2, Al2O3, CaO and Fe2O3, in which SiO2 content is up to 47%~54%. The calorific value of the extraction residue from the methanolysis of lignite is 20.21~22.65MJ/kg.

Through the studies on the coke porous structure and coke hot property of the coke made with single coal and coke made with blended coal in 40kg test coke oven and coke made in industrial coke oven, the effect of coke porosity on coke hot properties is obtained. The coke porosity has greater influence on the coke hot property. CRI increases and CSR decreases with the porosity increase. The correlation between the porosity and hot strength of the coke from industrial coke oven is that if porosity is increased by 1%, CRI is increased by 0.48% and CSR is decreased by 1.46%. The coke hot property determination with porosity has a guiding significance for coke production and coke hot property control.

The microstructures and hot property of the coke made with two types of gas coal with different grain sizes used in coal blending are analyzed. The result shows that when the gas coal nature and grain size are different, the degrees of reaction impetuosity occurring on the interface of the coke made are different, its result influences coke property. The smaller the grain sizes of gas coal, the bigger the interface contact area and the more impetuous, the interface reaction. The higher the content of active component in gas coal, the more impetuous, the interface reaction.

The coal blending test was conducted by the orthogonal design method, the correlation between the blending ratio of different kinds of coals and coke strength was studied. By means of orthogonal design method, the number of test could be greatly reduced, M40, M10 obtained from test, the coke size of bigger than 40mm and 25mm were analyzed by statistics, the optimal coal blending ratio was selected as: weakly caking coal 0, lean coal 25%, fat coal 18%, coke fine 3%, coking coal 54%.

The thermal balance calculation and comparison are carried out for the design working conditions and variation working conditions of the power generation station by taking the CDQ  power station of the plant of gas making with coke-making of Tangsteel as the study subject. On the basis of this, an analysis is conducted for the surplus heat recovery of CDQ power station, coordination of thermal energy utilization system and the heating power parameters matching between the inert gas circulation and steam circulation. Their analyzed results can provide a basis for optimized design and high efficiency operation of surplus heat power station.

The whole process flow industrial sidestream experiment is conducted for the natural gas synthesized with coke oven gas. The scale of experiment is 150m3/h of coke oven gas. The experiment of methanation unit lasts for 1 000h. The experiment result shows that M-849 catalyst has good methanation activity and selectivity and possesses good stability after many times start and stop and good performance of short term over temperature. The operation of the process with two-stage thermal insulation methanation of steam spatchcocking and no reacting gas circulating is smooth and simple. The composition of gas at the outlet meets the requirement of design indexes. 

The three kinds of A, B, C catalysts for which different molecular sieves carrying Ni are taken as carrier are evaluated with high pressure hydrocracking device. The result indicates that type C catalyst has biggest specific area and pore Volume and AATO distillate conversion rate is 39.4%. The sum of benzol and xylene yields is 18.5%. Co is added to  type C catalyst that has more ideal hydrocracking property, in order to improve property. The result shows that the addition of Co is favorable for BTX yield improvement and BTX yield is 25.9%.

The high added value aromatic chemical product made with coal is an effective way for the realization of clean and high-efficiency utilization of coal. The quick pyrolysis technology, directional catalytic conversion technology of pyrolyzate and hydrorefining liquefcation of coal for aromatic chemical product making are discussed on the basis of the present situation of relevant study and analysis carried out both at home and abroad. A new clew for making high added value aromatic chemical product is put forward.

To solve the problem of failing to reach the chroma standard of the coking waste water after the biological treatment with A/O process, the dicyandiamide-formaldehyde cation decolorizing flocculant is synthesized with dicyandiamide and formaldehyde as main feedstock. The decolorizing test of coking waste water is carried out. The result shows that when the colority of coking waste water is 158, pH value is 7 and adding amount of flocculant is 8mL/L, the decolorizing rate can be up to 61.21%.