A summary of research on China’s desulfurization and denitrification technology for coking process and low emission control technology of NOx for coke oven is provided.Based on thorough understanding of the mechanism of desulfurization and denitrification,it can be successfully combined with the traditional coke making process so as to make the coking industry more economical,sustainable,and environment friendly.

The limit value of SO2 emitted from coke oven chimney is defined as 50mg/Nm3 in the GB 16171-2012 “Emission standard of pollutants for coking chemical industry”.Most of coking plants can’t reach the limit value even the operation is in good condition.This paper analyzes the factors which effect the concentration of SO2 in chimney and provides with some reasonable suggestions and supplement for GB 16171—2012.

The important effect of hot-air system for protecting from acid raining and expanding the fume as well as avoiding corrosion during desulfurization is introduced.Meanwhile, the modes of the effect and related calculation are also stated.

In view of big quality fluctuation of bought-out coke which would disturb stable production of blast furnace,Ma Steel Coking Plant therefore changes the method of coke gradation conveying to that of total coke conveying which improves the homemade metallurgical coke rate by 4%~5% and dramatically reduces the bought-out quantity for grade 1 metallurgical coke.

As the collapse rate of coal cake for stamp-charging coke ovens is relatively high,the spillage coal produced shall regularly be re-used for coal blending.The influence of its blending ratio in the mixed coal on coke quality is studied,and the best ratio is found.

This paper recalculated the opening position of corbel zone outlet for the 6m top\|charge coke oven which has already been put into production. The result shows consistent with actual value. The paper also analyzed the factors impacting on the heating performance for oven end and therefore proposed a solution to increasing the oven end temperature.

This paper analyzes the coke burning loss process of CDQ to find out an economical running mode of CDQ.Suitably increasing air into CDQ system can produce more steam.The main burning loss is coke fines.Therefore,it is more economical to reduce coke fines production and generate more steam during practical production.

The actual situation of a 190t/h CDQ system working at half load is presented in this paper.Main parameters such as operation parameters of the secondary de-duster and temperature at the inlet of CDQ chamber have been tracked and optimized in a bid to provide support and help for half-load operation of CDQ under special conditions in the future.

Remote monitoring and management platform for coke oven machines combines the conventional coke oven machines and the internet for an integration of industrial technology and information technology to realize the functions such as remote monitoring, remote debugging,remote fault diagnosis, remote query of data statistics report for coke oven machines,etc.,so that the level of information management of the enterprises can be dramatically improved.

This paper introduced coke oven proper condition and a method of oven roof removal in hot state for 6m coke oven repairing.The hot\|repaired coke oven will have a smooth running, such as normal pushing at coking chamber,a significant reduction of heat consumption for cokemaking and a prolonged service life of coke oven battery.

The article analyzes the present situation and deficiencies existing in the steam system of the complex.It also proposes a solution that high-quality heat energy is firstly put into use for high-efficiency steam power orientation as well as the philosophies of steam regional recovery,regional utilization and echelon utilization,etc.so as to build up a demonstration for improving steam recovery efficiency.

The moisture of coal blends can be controlled around 8% by adopting CMC technology utilizing waste gas heat,which achieves satisfied economic benefit and ecological results.The result also shows that energy consumption for cokemaking on dry coal basis can be reduced by 136.4MJ/t,the coking time can be shortened by 0.5 hours, coke output can be increased by 2.7% and coke quality can be improved.In view of the problems found in actual production,effective solutions are proposed in this paper to ensure the utilization efficiency of the CMC technology.

This paper analyzes the reason for the pushing rod vibration based on the actual application of pushing rod,and proposes corresponding measures to reduce the vibration by optimizing the pushing rod during design and installation.Therefore,the vibration of pushing rod is minimized.

This paper introduces a process of synthesized natural gas making from coke oven gas,and proposes a technology for carbon adding as well as analyzes the economical efficiency of the CO2 adding that this technology can improve the availability of equipment,lower energy consumption and benefit the sustainable development of the energy.

At the moment,tail gas generated by an HPF process (wet oxidation process) cannot be treated properly.Through component analysis of the tail gas,it is found that the tail gas can be charged into a tubular furnace to be incinerated with air as a way to curb tail gas pollution.

In comparison to other desulfurization processes of flue gas,the ammonia process is considered most suitable for coke oven emission.And a few matters that merit attention during operation are brought up in this paper.

Furnace is one of the most equipment of acid plant.This paper introduces the control process and the acid gas feeding process and the control, automatic regulation and safety interlocking during burning process.

The application of gas chromatography method to coke oven waste gas analysis is introduced，and how the optimization of chromatographic conditions will affect the experiment is explained. The said method makes it possible to analyze the components of coke oven waste gas more accurately within a short period of time.

Process and operation of maltha and modified alsphalt productions are introduced.With reasonable design and less investment,the profitable process is able to produce maltha of 8 000t/month and handle coal tar of 220 000t/a.The device for producing modified alsphalt has features with compact structure,easy operation, highly automatized, stable & qualified product.

Regarding to the defects of tube heat exchangers in crude benzol unit，two sets of spiral plate heat exchangers are additionally provided，which significantly improves the heat exchange efficiency between lean and rich oil，and reduces energy consumption of this unit.

The determination of Benzo(a)pyrene content in coal tar pitch by gas chromatography is introduced.SE-54 capillary column and FID flame ionization detector are used for quantitative analysis by external standard method.Result shows that linear relationship is good.The method has exact result,easy operation and high sensitivity.

In view of poor separation of tar and ammonia liquor in coking plant at present,this paper introduces a solution of using demulsifier Bulab8604 to improve the separation of tar and ammonia liquor as well as the working condition of gas purification system.This solution will benefit the coking plant in a manner of safe and stable operation with sound economic performance and environmental benefit.

With coke breeze precipitated from CDQ dedusting as absorbent, the removal efficiency of COD,volatile phenol and NH3-N in coking waste water by CDQ coke breeze are investigated,including the coke breeze recycling condition.Under the required testing conditions,the removal efficiencies of COD,volatile phenol and NH3-N by coke breeze are measured 71.4%,76.9% and 8.3% respectively.Furthermore, the coke breeze can’t be recycled without regeneration.

The problems in ammonia stripping process by heat transfer oil is analyzed.After improvement, the efficiency of ammonia stripping is increased,the index of waste water is stabilized and maintenance costs of the equipment are lowered.