Reasons for high tar toluene insolubles, high viscosity, and high water content

Reasons related to the temperature in the furnace top space and coal blending account for a larger proportion.

This post was last edited by sdos34 on 2016-7-18 at 08:22. Factors that may affect these indicators include the quality of the coal blend, the proportion of different types of coal used in the blend, and the temperature in the roof space of the coking oven. We currently have a technology involving a separator that accelerates the separation of tar from ammonia water; it works quickly and can reduce moisture levels to below 1%. At temperatures of 65–80 degrees Celsius, this technology enables efficient dehydration in the product storage tanks, thereby saving steam energy. It also reduces the viscosity of tar by 5%-20%, improves the quality of the circulating ammonia water, lowers the COD level of wastewater, and reduces the resistance in the ammonia vaporization towers, primary coolers, and final coolers. This leads to reduced energy consumption, as well as a 20%-80% reduction in maintenance frequency and costs. The overall return on investment is 300%-600%, or even higher. [Application example] A coking plant in northern China with an annual coke production capacity of 900,000 tons and an annual tar production of 33,000 tons. 〔Before application〕 ■ The tar is highly emulsified; it is pressed from the mechanical clarification tank into an intermediate tank, and after 8 hours of dehydration in this intermediate tank, the moisture content of the tar is 13%~20%. ■In the large tank for tar products, steam is used for heating to 90°C–95°C in order to remove water; this process takes 3–5 days, during which the moisture content in the tar is reduced to below 4%. 〔After application〕 ■Add a tar-ammonia separator at the suction inlet of the circulating ammonia water pump. l ■ The moisture level in the tar intermediate tank is reduced to 2%~4%. l ■ Increase the dosage of the chemical agent to reduce moisture to 0.5%~1.0%. ■There is no need to use steam for heating and dehydration in the large tank for tar products. ■The oil content and suspended solids in the residual ammonia water are significantly reduced, which is beneficial for ammonia evaporation and wastewater treatment. The tar-ammonia separator can accelerate the separation of tar from ammonia, as well as speed up the dehydration of tar

This post was last edited by wfb123456 on 2018-1-3 at 15:17. It is related to your coal loading amount, top of furnace temperature, and the ratio of different coal types. The high-efficiency viscosity-reducing demulsifier imported by our company can help you solve this problem. Demulsification: It accelerates the separation of oil and water. Viscosity reduction: It forms an oil film on the pipe surface, thereby enhancing the fluidity of tar and reducing its viscosity. Cleaning: By softening impurities, it gradually removes them, thus achieving the purpose of cleaning deposits in pipes and equipment. In this way, the resistance of the subsequent primary cooler will also decrease, the frequency of oil discharge from the ammonia vaporization tower will be reduced, and COD levels will also drop. Using our chemical will be beneficial for your entire system: it effectively reduces clogging in the ammonia circulation nozzles, lessens the effort required for cleaning, removes deposits from the pipes, and extends the lifespan of the equipment. Additionally, it allows for the recovery of tar from the tar residues, bringing you direct benefits such as increased production. If you are interested, please get in touch with us; we can discuss the details further. Contact numbers: Engineer Liu: 13603574230; Engineer Wang: 18235786160

There is too much moisture; if a mechanical clarification tank is used, it might be that the overflow of tar and water is not properly controlled.

The temperature in the furnace roof area is too high; check whether the height of the coal cake meets the requirements, and observe the position of the coke line during coke pushing

1. The temperature control of the coke oven is too high or unstable. 2. The pressure in the air collection duct of the fan room is unstable, which causes excessive ash and dust to enter the primary cooler of the collection duct and condense within the tar. Moisture is related to the separation issue; for tar and ammonia water not to separate, it is first necessary to ensure that oil is pressurized in accordance with the procedures, and secondly, the two points mentioned at the beginning apply. It will get better slowly

It is caused by an excessively high temperature in the furnace top space; check whether the coal loading amount is normal and measure the temperature in that space.

Removal of floating coal from coal briquettes； Space temperature ； Blending coal ； It is related to the oil pressing operation