This paper analyzes the sources and emission concentration of SO2 and NOx in coke oven flue gas,discusses the measures to control the emission of SO2 and NOx and introduces mostly studied technologies of coke oven flue gas treatment at present. For the enterprises which are difficult to meet the emission standard requirement by strengthening the management,end treatment technology shall be adopted to make coke oven gas emission meet the requirements of national emission standards.

This paper introduces the production technology of anthraquinone,compares the production methods of anthraquinone,analyzes the development situation of anthraquinone production in China and discusses the future development of anthraquinone market in China.

This paper provides an effective method to control the collapse of coke cake by studying and analyzing the influence of key index of blending coal on stability of coke cake.

This paper analyzes the causes of the emission discharged from 7m coke oven battery,introduces emission control measures during coal charging and pushing.Meanwhile,part of the existing facilities are improved to improve the efficiency of emission control.

Combining with the engineering example,this paper introduces the principle and method of steam-drive device selected by coking plant.Steam drive can save costs,reduce energy consumption,improve the efficiency of energy use,and has more advantages than electric drive.

This paper explains the damage reason of the water seal pot and the improving method of automatic cleaning.Automatic cleaning can be achieved after improvement，which can solve the problem of water seal pot fine coke cleaning，reduce labor intensity，and prolong the service life of the water seal pot.

This paper analyzes the different types of online repair methods of CDQ expansion joint which can avoid the losses caused by shut down,ensure the system sealing effect under normal pressure condition and provide guarantee for the stable production of CDQ system.

This paper analyzes the commonly used protection mode of belt conveyor in coking enterprises, proposes the method of unattended operation, and optimizes the start and stop control scheme of belt conveyor.

In order to overcome shortcomings of 6m coke oven frame cleaning device，this paper proposes the optimization and improvement measures and introduces the structure，characteristics and application of new door frame cleaning device.

The fuzzy control system of coke oven collecting main pressure is developed by using STEP7+WinCC based on SIEMENS S7-300PLC,which solves the interference problem between quick response and multiple batteries collecting main pressure coupling.This system was proved effective in practice.

In order to overcome shortcomings of traditional method for measuring longitudinal temperature,regulating gas flow rate and flue suction by manual measurement,this paper introduces the vertical flue on-line temperature measurement and automatic heating system.The equipment are improved based on actual production.As a result, the stability of longitudinal temperature is improved,and gas consumption is reduced.

This paper proposes a closed loop control model of auto coal blending，coke oven heating and manless operation coking vehicles under the framework of ERP.Integration control shall be adopted for the upper and lower levels of these control model to realize full intelligent control system for coking production.

This paper studies the correlation between T5 temperature of CDQ and coke oven heating schedule.The results show that the CDQ running condition is good and each parameter index is stable by reasonable controlling of coke oven heating schedule to maintain the T5 temperature of CDQ chamber within a certain range，which is good to extend the life of CDQ.

This paper introduces the manufacturing process,mechanical properties and welding requirements of clad steel plate,compares the economical efficiency of stainless steel and clad steel plate.The application of clad steel plate in the coking industry can not only meet the design requirements,but also ensure the continuous and stable operation of the equipment.Meanwhile,non-ferrous metal resources can be saved.

This paper introduces the feasibility study and production practice of discharging PDS wet desulphurization effluent to the sintering plant for ore blending.That desulfurization effluent used for sintering ore blending provides a guarantee for the normal operation of coke oven gas wet desulfu\|rization system，reduces the investment and operation cost of the salt extraction equipment.Good economic benefit is obtained.

Since the production of benzene hydrogenation process,the content of benzene in non-aromatic fraction has been always high,resulting in a large loss of benzene.The content of benzene in non-aromatic fraction is reduced after analyzing the reasons and taking corresponding measures.

This paper introduces the treatment method of the desulfurization wastewater.Theammo-nium salt is extracted from the wastewater through decolorization，concentration and crystallization.The products can be used as chemical feedstocks after further oxidation reaction，and the clear liquid can be recycled.No waste is discharged.

This paper analyzes the principle and features of SCOT process and calcium desulfurization technology.Investment and running cost can be saved by adopting Claus unit tail gas calcium desulfurization,which could meet the requirement of production needs and environmental protection.

For extraction of crude quinoline process，the effect of pickling directly affects the yield and quality of the product.In the analysis of quinoline sulfate，there are many interference factors in determination of free acid.The experimental analysis is more stable.Washing efficiency and product yield are improved after improvement of the original method.

This paper analyzes the reasons of ETP auto-trip.The problem of false high oxygen content in gas can be solved and the normal operation of ETP can be ensured by improving the sampling facilities and optimizing sampling operation of oxygen analyzer.

This paper introduces the coal tar distillation process with a single set of processing capacity of 500 thousand t/a，for the aspects of heat conduction oil heat transfer，vacuum distillation and large volume tubular furnace.This paper analyzes and applies the energy cascade utilization，the centralized processing and the large-scale equipment，which improves the energy utilization ratio and reduces energy consumption of tar processing.

This paper explains the basic features and treatment difficulties of semi-coke waste water and introduces pre-treatment of feedstock ammonia,treatment of deamination and dephenolization,pre-treatment of distilled ammonia waste water,biochemical treatment,post treatment and advanced treatment technology.By adopting the above treatment technology,the treated water quality can meet the national discharge standard.

This paper introduces the corrosion condition caused by ammonium sulfate mother liquor and reasons for the corrosion of 316L stainless steel pipe, analyzes the features of glass lined pipe, steel framed polyethylene plastic pipe and polyethylene lined steel pipe, and service condition in the production of ammonium sulfate.Steel framed polyethylene plastic pipe is the ideal material according to the comparison.