Tar and ammonia water are difficult to separate; there’s no issue with the equipment
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Our company uses vertical tanks for separating tar from ammonia water. They have been in use for four or five months without any problems. But a few days ago, we suddenly encountered an issue where tar and ammonia water could no longer be separated. We checked the equipment and found nothing wrong with it. Some people suggest that it might be due to tar emulsification. I would like to know what causes this problem and what methods can be used to resolve it. I’m in urgent need of answers. Thank you to all experts out there; please don’t just stay silent – your help is appreciated! Thank you!
First, check whether the temperature of the circulating ammonia water meets the requirements; second, examine what substances are added to the tar-ammonia water separation system and whether there are any changes in these substances; also, consider the significant impact that the addition of desulfurization liquid has on the emulsification of the tar-ammonia water.
Neither the temperature nor the substances added have changed, and the desulfurization waste liquid has not been mixed into the circulating ammonia solution. It’s already been four days, and ammonia and tar still remain separated from each other
This post was last edited by hao101029 on 2012-4-5 21:38. Have any other waters or liquids been used? There are many types of water that can cause tar to emulsify, including acidic and alkaline waters, as well as biochemical sludge； It is said that poor operation of the coke oven can also lead to emulsification due to the suspended particles present. To address this situation, one option is to add a demulsifier, and another is to drain the emulsified water and store it separately. The oily portion at the bottom can also be sent to a tar tank where it can be left to stand and heated for separation, but both methods require some time. Also, I would like to know how to determine whether the equipment is functioning properly – could it be due to a leak inside the tar-ammonia separator or a leak in the oil pressure pipe?
What is the coking time of your coke ovens? The operating conditions of the coke oven also affect the quality of tar.
Product Description and Applications of S9100/S9200 Tar-Ammonia Separator ★ S9100/S9200 Tar-Ammonia Separator is a demulsifier and anti-caking agent based on a hydrocarbon mixture. ★ It is mainly used for the demulsification of water-in-oil emulsions and the separation of oil and water. ★ It is particularly effective in the tar-ammonia water separation, flushing liquid, and washing oil systems of coking plants. ★ It is very effective in reducing tar moisture and maintaining relatively stable tar moisture levels. ★ It can also reduce the viscosity of the oil phase, decrease the stickiness of the oil, and prevent the oil and suspended particles from adhering and depositing on the surfaces of equipment and pipelines. ★ It shows significant effectiveness over a wide range of pH values. The tar-ammonia separation agents Sinofly 9100 / Sinofly 9200 can significantly improve the operating conditions of circulating ammonia systems, primary coolers, ammonia vaporization towers, and similar equipment. The effects are evident in various aspects: recycled ammonia water results in greater cleanliness (lower levels of tar and suspended solids). ★ Tar moisture: Generally, the tar moisture decreases by 1-3% (based on the moisture content of the tar before the use of Silofly products; the higher the initial moisture level, the greater the reduction). ★ Tar viscosity: reduced by 5%-20%. ★ Tar production has increased. ★ Gas collection pipe: The clogging issue of the circulating ammonia water nozzles has been significantly improved, reducing maintenance frequency and costs by 20%-40%. ★ Pressure flap: Enhances control of the pressure in coke ovens and reduces gas leaks. ★ Mechanized clarification tank: reduces the amount of tar residue produced, thereby lowering the costs associated with residue treatment. ★ Ammonia evaporation tower: cleaner trays, reduced energy consumption, and a 20%-40% reduction in maintenance frequency and costs. ★ Primary cooler: The quality of the condensate improves; the deposition of tar, naphthalene, suspended solids, etc., within the primary cooler is reduced. Any existing deposits are partially washed away, the pressure difference across the primary cooler decreases, energy consumption is lowered, and maintenance frequency and costs are reduced by 20%-40%. ★ Primary cooler: A better spraying effect and a cleaner primary cooler can reduce the outlet temperature of the primary cooler by 1–3°C. ★ Tar intermediate tank: In this tank, the rate of water separation from tar increases, reducing the separation time; this saves steam, lowers energy consumption, and improves production efficiency. If you need help, you can send a message within the site.