The development status of modern coal chemical industry is introduced, including its high carbon characteristics. In our modern context of carbon neutrality policy, this paper puts forward solutions on reducing carbon emissions in aspects of “carbon source”，“carbon application”， “carbon emission”and“carbon recovery”in the hope of realizing green development of coal chemical industry at the earliest.

Abstract: This paper mainly introduces intelligent production management such as data form， calculation method and fault judgment for 6 units，i.e. coal blending & cokemaking，cooling and exhauster，ammonia stripping，desulfurization，ammonium sulphate production and crude benzol removal. Application method of the platform is also given. This intelligent production management platform based on balance calculation could realize real-time data collection to complete the calculation of material balance，heat balance and water balance，analyze the troubles in operation so as to achieve optimized production，energy conservation and emission reduction.

 Domestic coking coal and other main high-quality coking coal are in short supply in China， and the use of high sulfur coal resources is restrained due to high sulfur content. When large proportion of low-sulfur anthracite is mixed，high-sulfur fat coals should be appropriately added according to the behaviors of the coal kind. For environment-friendly heat recovery stamp-charge battery，qualified coke product with CSR≥60% can be produced by accelerating heat-up rate at early coking stage， maintaining constant temperature in coking chamber at middle stage，and appropriately prolonging the soaking time. This solution can dramatically reduce the coal blending cost.

 The characteristics of stamp-charge coke oven are analyzed, and the heating system control for stamp-charge coke oven under the condition of ultra long coking time is studied. By taking particular measures, the oven wall leakage and oven end damage can be effectively avoided.

 The abnormal coke discharge in CDQ system is analyzed，and the improvement measures are proposed. The application of regulating device in vibration feeder has significantly improved CDQ coke discharge and the stability of CDQ system operation.

After the coke oven is cooled to normal temperature, damages, severe or slight，would appear on different positions of oven proper due to physical properties of silica brick, structural characteristics of the coke oven and the shutdown operation mode，etc.. According to the specific situation of coke oven after shutdown and relevant theoretical analysis，this paper expounds the key points and bottlenecks of maintenance with restart，and proposes solutions from the perspective of design and construction. After this technology is put into application，the coke oven is in stable operation, which proves that it is feasible to adopt this technology for maintenance with shutdown and restart.

During stamp-charge battery operation，coal box deformation commonly occurs in the coking industry，it would cause environment pollution，such as charging emission and flame，even result in coal cake collapse，which affects normal production of coke oven. Through analysis，solutions are put forward to lay a solid foundation for coke oven operation in a stable，sustainable and high-efficient manner.

 Through comparison of the fineness of coal charge before and after the cross screen of coal crusher, the result shows that the additional pre-screen can reduce over-crushing, with the proportion of <0.5 mm coal drop by 14.68% and increase coal charge per oven by 1.1 tons, with dust reduction by 2.3 t/d. It also saves spare parts and power consumption for the system by CNY 906,000 each year, with direct economic benefit up to CNY 17, 400, 000 plus

 In consideration of the uneven heating in vertical direction of 7.63 m battery at present and according to the traditional theory and unique feature of coke oven structure，a test was carried out for heating adjustment to shorten the gas combustion flame in the vertical flue，the result was not satisfactory. Under the control method of“low standard temperature and low pressure of heating gas”， the uniformity of vertical direction heating has been improved to some extent.

In this paper，with the development trend of large-scale，automatic and low energy consumption of CDQ process，an intelligent system based on industrial Internet for CDQ production is proposed. Through collection，storage and analysis of industrial data，the processed data is synchronized to the industrial Internet platform，and the linkage control model between the upper and lower levels in the system is used to achieve CDQ intelligent production in manner of efficiency， accuracy，stability and safety.

 In this paper, selection and practice of desulfurization and ammonia removal process are introduced for COG treatment. A new technology combining improved AS circulation scrubbing for desulfurization and ammonia removal is adopted. This new technology is characterized with rich solution decyanation and pressurized deacidification based on conventional AS desulfurization making concentrated ammonia liquor, without producing waste desulfurization liquid and sulfur slurry.

 The features of single-column negative pressure benzol removal process with customized intelligent control system are introduced，including its performance. This process is characterized with high efficiency of heat exchange，less waste water produced，good quality of circulating wash oil， free of residue，low wash oil consumption，no tail gas pollution，and high automation level during the entire operation. Through monitoring and analysis of operation data，it proved that the process is stable and reliable，with low energy consumption，high economic benefit，high automation level，which can meets the requirements of green production

 The chloride ion content of crude benzene in Dongxin Coking Co.，Ltd. exceeds the standard，resulting in unsalable products. Through analysis，effective measures have been taken to keep the chloride ion content in crude benzol below 10 mg/L and stable，which provided a reference for coking industry to solve similar problems

This paper introduces the actual application of air cooler in primary cooler of a coking plant. Compared with cooling circulating water system of open-circuit cooling tower，the closed-circuit circulating system has the advantages，such as reducing fresh water consumption per ton of coke and saving energy，which will have a great potential for wide application in coking industry.

 In view of large steam consumption and high operating cost of steam type LiBr refrigerator， flushing liquor waste heat type LiBr refrigerator will be used instead of steam type LiBr refrigerator. The flushing liquor process is also optimized. The refrigerator unit runs stable after the modification，saving steam cost over 10 million yuan per year

 A method of judgment for reboiler leakage in benzene hydrogenation system is introduced in this paper. The feedstock in each reboiler is analyzed according to the heat transfer oil level drop in tank so as to quickly locate the leakage point of the hot oil through chemical and physical detection.

 The VOCs waste gas emission of coking plant was investigated. The VOCs waste gas treatment scheme was proposed，and its comprehensive treatment process was designed. After treatment for the VOCs waste gas from coking plant，the quality of surrounding atmospheric environment can be significantly improved

 This paper introduces the sources of NH3 and NMHC in coke oven flue gas，and puts forward specific measures for NH3 and NMHC control based on actual operation. On the premise of ensuring normal production of coke oven，the emission value of NH3 and NMHC in coke oven flue gas can meet the requirements of Emission Standard of Air Pollutants for Coking Chemical Industry （Exposure Draft）.

 Fugitive emissions are found at oven ends on pusher side and coke side when oven doors being extracted by pusher machine and coke guide as well as coke being pushed. Modifications have been done for dedusting pipelines on P.S. and C.S., movable dedusting and charging dedusting pipeline system, which have achieved good results and provided experience for research of coke oven emission control in coking industry.

 Because of the complex composition of concentrated brine, difficult to treat, it is therefore, the bottleneck of zero discharge of wastewater. Electro-dialysis and EDMB membrane treatment were used to carry out the concentrated brine pilot test study, with salt concentration in the treated water less than 5 g/L. Through the process unit combining electro-dialysis and EDMB membrane treatment, the concentrated brine of reverse osmosis unit for wastewater advanced treatment of Shanxi Coking Company was used as the medium to produce acid and alkali for regeneration of membrane process and resin process to achieve the goal of energy conservation, emission reduction and resource recovery of coking wastewater.

This paper introduces the application of “ozone denitrification + wet electric demisting” technology in treatment of ultra-low emissions of tail gas from sulfuric acid plant by using sulfur slurry. After the technical upgrading，the emissions of the main pollution factors，i.e. particulate matter，sulfur dioxide，nitrogen oxides in the sulfuric acid tail gas not only meet the special limit requirements of air pollutants in GB16171—2012，but also reduce the total amount of nitrogen oxide emissions from the sulfuric acid discharge as a result of the emission concentration much lower than the targets, making due contribution to the total nitrogen oxide control for the corporate