A new coking coal drying technology was developed with reference of DAPS technology.By using of this technology,coal can be classified to three grain sizes-fine coal, medium coarse coal and coarse coal.Therefore pretreatment of coking coal became an integration of drying,briquetting and selective crushing.

Based on the carbonization and gasification features of Fushun furnace，material calculation for Xinjiang oil shale in Fushun carbonization furnace is carried out by comprehensive calculations.As a result，a general material calculation method is obtained for the carbonization process of oil shale in Fushun furnace.The calculation result by this method provides basis for production check，technology and equipment evaluation，control，analysis and measurement of material，understanding of process material distribution and selection and design of purification and delivery equipment.

In order to study the properties of coking coal at different grain sizes,Zhaogezhuang fat coal,Hailing 1/3 coking coal,Mucun coking coal and Sangei lean coal are screened by 10mm,5mm,3mm and 1mm screens.Coal quality analysis and coal petrography analysis are carried out for each individual coal at different grain sizes.Influence of coal kind and coal grade to coking coal property is studied,which provides certain theoretical basis for selective crushing process of individual coals.

This paper studies the influence of ash on the initial solution reaction temperature of coke after coke is added with different amount of ash through experiment.The initial solution reaction temperature of coke deceases with the increasing of ash.The initial solution reaction temperature decreases from 941.6℃ to 927.7℃ with the addition of ash content from 1.63% to 20%.Fe2O3，CaO and MgO work as catalyst to the solution reaction of coke，while SiO2 and Al2O3 has little influence to the solution reaction of coke.

This paper introduces the change of process and coke quality after modifying the 4.3m top charging coke oven battery to stamp charging. After the modification,the coke yield has almost remained same as before,while the coke strength at cold and hot conditions has increased,and the coke screening has been improved,the metallurgical coke rate could be increased by 2.5%,coke nut yield has been reduced by 1.5%,and coke breeze yield has been reduced by 0.5%.

This paper analyzes the reason for abnormal CDQ discharging temperature.Measures such as optimizing operation,treatment of floating coke,center and surrounding air ration adjustment and leakage prevention of the system are taken to control the discharging temperature in normal range.Therefore the production of CDQ system is stabilized.

This paper introduces the problems existing in the charging emission control system of top-charging coke oven.Reasons for those problems are analyzed and corresponding measures are put forward to effectively seal the charging hole.Smokeless coal charging technology for top-charging coke oven is introduced.It is proved to have good effect.

This paper proposes the process design of adding dedusting dust and sewage sludge in coke plant to coal blending process and analyzes the advantages and disadvantages as well as the economic benefit.On condition of stable coke quality,the method could increase the utilization value of dedusting dust in coke plant,and solve the problems of wastewater discharge and sewage sludge treatment in coke plant.

This paper introduces the technology of utilizing the waste heat of coke oven flue gas, and analyzes the technical and economical feasibility of this technology.With the application of one set of flue gas waste heat utilizing device, coke oven gas can be saved by 2 000m3/h, methanol production can be increased by 8 000t/a, and profit can be increased by 22 400 000RMB/a.

Regarding to the problems existing in the charging emission control system of top-charging coke oven,the de-dusting main and water tank are modified to compound box structure,and water seal type explosion proof device is replaced by oil type explosion proof device.The charging emission control effect is improved and running cost is reduced after improvement.

This paper introduces a 7m coke scraping device,which is mainly composed of steel structure platform,coke scraping unit and coke quenching & conveying unit.It has the advantages of simply structure,module assembly & disassembly and low cost,and it could safely and efficiently solve the problem of hard pushing in coke oven battery.

This paper studies the moving principle of the main drive system for multi-hammer stamping machine.The positive pressure change curve of cam group is obtained based on dynamic analysis.With the study of supporting features of the main axis,a new supporting form good for load-carrying of the system is designed,and the design of main axis is proved under various working conditions.

This paper comprehensively analyzes the reason for over high temperature of oven top space during production management and operation of coke oven battery,and provides relevant measures corresponding to some causes from the aspects of oven condition,operation and management.With the application of these measures,the average temperature of oven top space is reduced by 14~27℃ as expected.

Naphthalene content in coking naphthalene is determined by gas chromatography and area normalization method.The determination condition of capillary column gas chromatography and its precision and accuracy are fixed and proved through experiments.The result shows that capillary column gas chromatography has the advantages of high accuracy and less deviation, which is good for guiding the production.

The modification of the ground burner in methanol making device from coke oven gas has avoided overpressure in exhausted gaspipelines, and it also realizes full recovery of the leaked exhaust gas, which has increased the methanol yield.

This paper introduces the low-nitrogen combustion technology to control NOx generation in exhaust gas of coke oven battery and the denitration technology for exhaust gas,and it also elaborates the applicability of dry denitration and wet denitration method and the problems to be solved.

As the composition of coke plant wastewater is very complicated, it is very difficult for treatment. The main source of coke plant wastewater is ammonia stripping wastewater, and this paper uses hydrolysis method for removing the cyanide in coal water to reduce the cyanide content in ammonia stripping wastewater, so that the cyanide content in wastewater after treatment in wastewater treatment station could reach the required standard.

A new technology using salt extraction liquor instead of production water to prepare ammonium sulfate mother liquor was developed.The mixture of proportional salt extraction liquor and production water is used to prepare circulating spray mother liquor for ammonium sulfate system.Production water consumption and waste water treatment cost are reduced without influencing the quality of ammonium sulfate.Harmless reuse of salt extraction liquor is realized.

Head space gas chromatography was used to determine BTX content in crude benzol.The experiment proves that head space gas chromatography meets the requirement for BTX content analysis in coking crude benzol.This method can be used to guide production operation for it has the advantages of high precision and good repeatability.

This paper systematically analyzes the influencing factors based on production realities for the problem of blockage in ammonia stripper which has impacted stable operation of the system,and proposes optimization and modification for oil discharging in source liquor,alkali dosing mixer and feeding process for ammonia stripper,which has reduced the blockage of ammonia stripper trays and greatly improved the operation stability of the system. In addition,the NH3-N content in wastewater from ammonia stripping could be stably controlled within 100～200mg/L.

This paper introduces the three methods of reducing total cyanide concentration in coke plant wastewater.The test shows that the methods of coke absorption and flocculant dosing to oil removal tank are both effective.Coke absorption method will increase labor intensity,so it is not a good option; while the method of dosing flocculant to oil removal tank with self-pressure blowdown system could not only reduce the total cyanide concentration and also benefit the biochemical treatment process.

On condition of not changing the column body of original ammonia stripper and deacidifier,this paper presents the method of replacing original internals with new type vertical sieve trays,which has solved the problem of insufficient capacity and effect of ammonia stripping process.The capacity could be increased to 200~280m3/h from 133m3/h,and at the same time the parameters of ammonia stripping and deacidifier could meet the requirement of original design,so that it has achieved the effect of high yield with lower energy consumption.

This paper presents the method of utilizing the coking waste heat for winter heating, and the waste heat after winter heating is further supplied to vegetable greenhouse, which has recovered low quality heat energy and realized gradient utilization of heat energy.

The coking waste water after biochemical coagulation is pretreated by tube settling pond and 0.4~1.2mm shallow sand filter, and then deeply treated by fixed-bed resin absorption.The water after treatment meets the requirement of recycling.The concentrated liquid generated by the regeneration of resin absorption bed is sent to the biochemical unit after Fenton oxidation.