Based on actual running status，this paper indicated different energy-saving features and economic threshold for different heat resources of coal moisture control and quantificationally analyzed the performance of energy-saving & emission-reduction by calculating coal moisture control of fluidized bed with flue gas as heat resource and the coal moisture control of rotary kiln with steam，aiming at an optimum running of the system.

This paper studied the technique of production,current status and outlook for dimethyl ether and also put forward a suggestion for this industry,which has overproduction nowadays in China and a bright future in the long run.

The drying of low rank coal is the necessary pre-treatment process for its efficient  utilization.A process of "fluidized-bed drying with internal waste heat utilization" which has been operated in commercial scale in Germany is expounded in this paper.The process with innovative concept of technology has advanteges of safety,high efficiency,low consumption and less  emission.It is the advanced process suitable for pre-drying of low rank coal and worth notice.

By the means of coal\|quality analysis and crucible electric furnace coking experiments on Austrilian coal and domestic six kinds of single coal，the analysis of the feasibility of Australian coal instead of Xiqu coal for coal blending were investigated.The results indicated that the Australian coal is featured with low ash，low sulfur and high volatile content，so blending the Australian coal can decrease the ash and sulfur content，increase the anisotropic index of coke after carbonization and improve the coke strength.

The harm of CO as well as the factors effected CO content in waste gas by coke oven heating is summarized.CO content in coke oven waste gas can be reduced efficiently by technical measures such as controlling excess air factors,bettering bricklaying management of newly-built coke oven,using reversing cocks during BFG heating,adding air cleaning device during reversing,installing on\|line instruments to detect the content of the waste gas,and emphasizing routine hot maintenance for coke oven.

This paper introduces a way for on-line check of connecting duct in the quenching chamber which can directly monitor the damage of refractories in connecting duct for a better operation of CDQ chamber and with longer annual repair cycle.

Based on the properties analysis of long flame coal.We added long flame coal to replace part of 1/3 coking coal and gas coal for cokemaking test according to the present coal blending scheme.The result shows that long flame coal can replace part of 1/3 coking coal and gas coal for cokemaking when increasing the mass percentage of fat coal. This will be beneficial for reducing sulfur and ash content in coke，saving the coking coal resources and lowering the coal blending cost.

This paper discussed mean maximum reflectance of vitrinite in individual coals and analyzed pore structure of coke through 40kg test oven.The regression equation of pore structure parameters and the coke qualities can be used to guide coal blending and coking.

This paper described a pre-crushing for individual coal fineness by using 70kg testing coke oven and CDQ to determine the coal category to be pre-crushed and optimum fineness range with precondition of ensuring the hot strength of the coke.The research shows that with increasing of the coal fineness,the hot strength of the coke also varies with different fineness of lean coal and gas coal and when the fineness of crushed coal is controlled around 60%,the bulk density of the blended coal increases,which could benefit the output and quality of the coke.

This paper analyzed charging emission control status in coking industry and described a  solution by using high pressure ammonia liquor plus a double-U emission transfer pipe on oven top and a dedusting hood on P.S. plus water-seal type dedusting main for suction,incineration and purification on the emission at oven ends,which has dedusting efficiency up to 95%~99%.

With description of the cause，harmfulness，mechanism and prevention measures against water hammer，and by analyzing several typical measures for water hammer prevention in wet quenching system，this paper concluded that delay\|close check valve can be selected at the outlet of quenching pump and automatic hydraulic pump can be used on the pipeline carrying quenching water so that the water hammer can be effectively avoided in the wet quenching process.

This paper introduces the influencing factors to the de-dusting efficiency of secondary de-duster and improvement measures,and some problems which need to be solved in design.Practice shows that the secondary de-duster can meet the CDQ process requirement on de-dusting.It is stable and has high performance-price ratio.

A comparison is made between the year of 2011 and 2012 for the coal ash content of charging coal as well as the ash content of self-produced coke in Shaoguan Iron & Steel Plant and an analysis is made on the effect of cost by reducing ash content in coke.The result shows that,comparing with 2011,the ash content of self-produced coke in 2012 decreases by 0.54%,saving cost about 40.4 million yuan.

This paper introduces the application of infrared thermometer on coke oven.The temperature of coke cake is rapidly displayed through the on-line automatic measuring, which guides the heating regulation of coke oven.Meanwhile,by using the thermometer,the work intensity is eased; the accuracy of measurement is increased,and the heating regulation is improved.

This paper describes the classification,composition and nature of coal andintroduces basic conditions of high temperature coal tar hydrogenation.The principle,technology,difficulties and production status of the hydrogenation is outlined as references for the project estimation.

This paper introduced the principle and process flow of desulfurization by mono ethanolamine method and indicated some corrosion occurred in the process equipment.For the position apt to be corroded，measures can be taken by using anti\|corrosion materials or by adding corrosion inhibitor to MEA solution.The equipment should also be prevented from blockage to reduce desulfurization efficiency.

This paper analyzed the reason for high content of naphthalene in COG after gas primary cooler and raised a solution by technical innovation,which shows economical,feasible and effective.

On basis of newly-developed process of coal tar separation at low temperature and coal tar separation device,and in order to improve the extraction rate of coal tar,an analysis is made in this paper from aspects of quality of solvent,properties of the coal tar and operation temperature.Optimized measures are taken to improve the extraction rate of coal tar.

This paper analyses the HPF desulfurization process and describes reasons of the low yield of ammonium sulphate. After taking advanced measures，the condition is proved and ammonium sulphate yield can reach about 0.85%.

This paper described the harmfulness and solution to the carbon deposition and coking problem in the further COG desulfurization system in methanol production.To this end，measures have been taken by equipment modification and process innovation so as to minimize the impurities into the further COG desulfurization system for a sound performance of the hydrogenation catalyst and longer life expectancy of the equipment.

In order to deal with difficulty in treatment of HPF desulphurization waste liquor,ammonium salt is extracted from the waste liquor.In this way,the waste liquor is recycled and high economic value ammonium salt products are made so as to recycle the sources.

This paper studied the relationship between the aromatic lipid ratio of mixed solvent and the density at a certain temperature in order to improve the production efficiency,reduce the production cost and judge the aromatic lipid ratio of mixed solvent rapidly. Experimental results show that there is an obvious linear relationship between the aromatic lipid ratio of mixed solvent and the density at a certain temperature,also the linear relationship has guiding significance to the production.

The coke oven exhausting system consists of gas collecting main,gas exhauster,primary cooler and exhauster speed adjusting gear.It is used to adjust the speed of gas exhauster to keep a stable suction force before primary cooler and stable pressure in gas collecting main,so coke oven gas can be transmitted stably.Two models of working condition are established to control the system with different GPC parameters.The result shows that this system has strong robustness to restrain disturbance,and stable transmission of raw coke oven gas is achieved by the gas exhausting system.