Research About Application Of Electrocoagulation Technology In Coal Gasification Wastewater Treatment

China has always been a world super-country coal development and utilization.In 2016 China's coal production reached 3.41 billion tons,and coal consumption accounted for 62.0%of the total energy consumption.Coal gasification process is increasingly becoming an important technology for comprehensive development and utilization of coal.At present,the main factor that restricts the further development of coal gasification process is the difficulty of coal gasification slag,which leads to the problem of slag water quality,serious scaling of equipment and pipeline,and the continuous production of coal gasification process.In this paper,compared with a variety of common hardness,turbidity removal water treatment technology,electrochemical treatment technology can simultaneously remove contaminated material such as the water hardness,turbidity,suspended solids,and ensure the stable operation of the slag water system.First of all,the process through electrochemical reactor,through the electric flocculation and electrical oxidation,and electric processing a variety of ways at the same time,which can effectively remove the temporary hardness and permanent hardness in the water;using punched hydrocyclone technology,make the flocculant gel group grew up full collision;using Hpin hydrogen ion implantation patent technology,without the introduction of acid radical anion,to join H+ ions into the water,by adjusting the parameters of the water pH value,makes the water ions in the unsaturated state again of knot dirty sex,are less likely to produce fouling.The equipment adopts the form of integration,steel or concrete.Equipment within the reaction tank structure compact,can effectively reduce the equipment cover an area of an area.After many experiments,according to the characteristics of the coal gasification system,to remove the unnecessary equipment structure,and the optimized integration of the parts,greatly improve the removal efficiency of the whole of the equipment;effectively reduce the hardness of water through the system at the same time,reduce the probability of scaling and fouling of coal gasification process,extend the period of system stable operation and reduce the unscheduled shut-down.After a series of changes in the technology in fertilizer plant run formally put into production.coal gasification displacement reduced slag water system,sewage treatment fee and filling water system of filling water decreased,while the heat loss due to drainage.Through calculation,the slag water system of drainage water volume and filling water volume can be made of 130 m3/h dropped to 90 m3/h,which can reduce the city 6.644 million yuan a year in the system maintenance cost,and greatly reduce the tendency to the structure of the equipment,make the coal gasification system can long-term and stable operation.