This paper introduces an environment-friendly coke production for domestic use replacing raw coal,which can fundamentally cut pollutant and minimize the environment pollution.It also describes the impact of firing raw coal to the environment as well as experiences in research,execution and promotion of environment-friendly coke for domestic use by Taiyuan municipal government.An approach of coking enterprises transformation by utilizing surplus cokemaking capacity in China is also given in this paper.

This paper introduces the development and application of new CDQ technology.The application of this new technology extends the maintenance interval, and shortens the maintenance time.It is hopeful that total CDQ mode will become the operation mode for newly built large scale steel complex.

Polyoxymethylene dimethyl is a new type oxygen containing fuel.This paper introduces the process of synthesizing polyoxymethylene dimethyl,the present situation of industrialization in China and problems existed in the progress.

The influence of semi-coke grain size on density of briquetted coal and strength of briquetted coke is studied.It is found that,as the grain size of semi-coke breeze decreases,the strength of briquetted coke increases,and then declines after reaching the peak where the grain size of semi-coke is below 3mm.The strength of briquetted coke produced can be increased significantly when the best blending ratio is adopted.

This paper introduces the design principle of emergency spraying system for CDQ belt conveyor and proposes an optimum solution to the problems in the existing system as well as the break time of globe valve in order for a safe and stable running of the belt conveyor.

The experimental study shows that coke quality can be improved by adding modified pitch to coking coal.After the application of modified pitch，it reduces CRI by an average of 3.82% and raises CSR by an average of 3.49%，a noticeable improvement in coke quality index.

This paper introduced the operating principle,process flow and technical features of modularized indirect heating & fluidized bed type coal moisture control  process,described its critical equipments,key points for commissioning,operating conditions & performance,and summarized advantages and reliabilities of this process in energy conservation and emission reduction.

Many methods for coking rate are summarized in this paper based on the production data 6m top charging coke oven and 6.25 stamp\|charging coke oven.The derivation of some equations is described.The reason for result deviation between different methods is analyzed,which providing a basis for calculating coking rate accurately.

Principles of setting the standard temperature difference between coke oven pusher side (PS) and coke side (CS) are formulated.A few examples of how to regulate the PS and CS temperature difference are analyzed.After regulation，the temperature distribution in coking chamber vertically and laterally becomes more uniform，and coke strength in both hot and cold state improves significantly.

This paper introduces the first medium repair of CDQ system,and proposes improvement methods to extend the service life of CDQ.Schemes of heating up after medium repair arecompared,and the feasibility of heating up with red coke is proved in practice.

The cause of the crackling in graphite-removing slot of reversing cock is analyzed.When the air slot crackles,deal with the gas leakage in the cellar without delay.The problemcan be resolved by using the new type of reversing cocks.Check the under-jet pipe and brick gas duct,and carry out guniting where leakage appears.

This paper introduces mechanism compositions and features of different traverse locomotives for CDQ coke bucket,such as gear\|rack type and wire rope\|reel type.Improvementswere also given in this paper for the problems found during actual operation.

This paper introduces the process flow,technical features and performance indexes of HYGAS gasification technology,and analyzes its industrial application.Analysis shows that this technology is suitable for a broad range of coals,and it has the advantages of high efficiency in carbon conversion and low material and energy consumption.It is suitableto treat low rank coal including lignite coal in the way of coal gasification and IGCC.

This paper introduces the necessity of adding forced ventilation system in coke oven cellar with factors to be considered.Adding forced ventilation system could satisfy the requirement for safety production of coke oven, and meanwhile improve the working environment of workers, so that it could realize safe, scientific and humanized operation.

In view of the worse separation performance of extraction distillation column, the existing F-1 valve tray is replaced with high\|efficiency CJST tray.After the optimization, the aromatic hydrocarbon on top of the column improves in quality and extraction column liquid level fluctuation vanishes so that stable production can be guaranteed.

This paper introduces the technology of separating anthracene and carbazole from tar.The process flow,main equipment and issues to pay attention to are described.Compared to solvent method,this technology is advanced and mature,and it has the advantages of good quality product,stable operation and environmental protection.

Raw material must be pretreated for needle coke production.Generally solvent method is adopted to prepare refined pitch from maltha.Experiments were carried out to determine the optimum ratio between solvent,insolubles and maltha.The yield of refined pitch and influence of QI are analyzed in this paper,so as to finalize the process condition to prepare refined pitch.

Multiphase flow model is adopted for computation of fixed bed.Reliability of multiphase flow analog calculation is analyzed based on the application of FLUENT software in CFD.Comparison is made for the advantages and disadvantages of porous medium model and multiphase flow model.The application prospects of multiphase flow model are summerized in this paper.

The application of coal moisture control (CMC) through built-in fluidized bed will lead to the increase of gas transport resistance and quality fluctuation of by\|products.After the implementation of some preventive and corrective measures in the gas purification system,blockage inside the pipeline and column can be avoided.As a result, high quality of by-products can be maintained.

This paper introduces a combination process of “special Reserve Osmosis membrane+Mechanical Vapor Recompression (MVR)+Thermal Vapor Recompression (TVR)” to treat membrane concentrate for coking wastewater.This application can produce zero wastewater with lower capitalized cost and running cost.

This paper introduces the resource,hazard and composition of cyanide containing waste water,and discusses the treatment method,principle and standard discharge of cyanide containing waste water.

The de-oiling efficiency of ceramic membrane filter is low due to blockage of strainer core and failure of back flushing system during operation. By adopting of jet flotationde-oiling process and strengthening of settling,de-oiling efficiency is improved.

This paper recounts the importance of performing HAZOP analysis during engineering stage in order to discover potential hazards of a project so that modification can be done in aspects of process parameters and process flow,etc.to avoid accidents in operation.This paper also demonstrates a HAZOP analysis for an oil depot unit of a coking plant during engineering stage.

Reaction conditions for Fenton oxidation treatment of desorption solution are:reaction time 4hrs,pH value 7.0,and oxyful 2%.Apply this method to a 120m3/d industrial scale test, resulting in over 70% COD desorption rate,and up to 90% chroma removal rate.

By analyzing the impurities on packing of final cooler plus dissolving test with different solvents in laboratory, on-line cleaning for the final cooler can be realized without shutdown so that the high resistance of the final cooler can be remarkably decreased to normal.