Tar ammonia water demulsifier and preparation method thereof

Abstract

The invention discloses a tar ammonia water demulsifier and a preparation method thereof. The tar ammonia water demulsifier comprises the following raw materials in parts by weight: 20-30 parts of bisphenol A, 10-20 parts of butyl methacrylate, 15-20 parts of acrylic acid, 5-15 parts of propanediol, 10-15 parts of trimethyl-propane and 3-5 parts of an initiator, wherein the initiator is one or a combination of more of benzoyl peroxide, lauroyl peroxide, azobisvaleronitrile and hydrogen peroxide. The preparation method disclosed by the invention specifically comprises the following steps: S1, preparing an intermediate copolymer, namely firstly, adding bisphenol A and butyl methacrylate into a reaction kettle; S2, preparing the tar ammonia water demulsifier. The invention relates to the technical field of demulsifiers. According to the tar ammonia water demulsifier and the preparation method thereof, the tar ammonia water demulsifier has the characteristics of being rapid in demulsification rate, high in dehydration rate and good in dewatering water quality, is excellent in performance, can meet the tar ammonia water separation effect under the condition of a small dosage, thus is very beneficial to relevant production enterprises.

Description

technical field [0001] The invention relates to the technical field of demulsifiers, in particular to a tar ammonia demulsifier and a preparation method thereof. Background technique [0002] Coal tar is a mixture with a very complex composition, which contains a large amount of non-polar substances and is incompatible with water. There are extremely fine coal powder and coke powder in coal tar, and the water in coal tar is in the form of fine water droplets, and It is tightly wrapped by coal tar and forms a stable emulsified suspension with coal tar. When the tar content in circulating ammonia water is less than 100mg / L, the negative impact on the production process is acceptable, but in most ammonia / tar operating practices Among them, the tar content is far higher than this value, some will be 200-700mg / L, and the high ones will even reach 2000-3000mg / L. Under such a high tar content, the combination of tar and suspended solids in the system will cause The deposition will...

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Problems solved by technology

[0002] Coal tar is a mixture with a very complex composition, which contains a large amount of non-polar substances and is incompatible with water. There are extremely fine coal powder and coke powder in coal tar, and the water in coal tar is in the form of fine water droplets, and It is tightly wrapped by coal tar and forms a stable emulsified suspension with coal tar. When the tar content in circulating ammonia water is less than 100mg / L, the negative impact on the production process is acceptable, but in most ammonia / tar operating practices Among them, the tar content is far higher than this value, some will be 200-700mg / L, and the high ones will even reach 2000-3000mg / L. Under such a high tar content, the combination of tar and suspended solids in the system will cause The deposition will affect each process of gas cleaning operation, which not only directly reduces the cooling efficiency of the system, greatly increases the operation and maintenance cost of the system, but also reduces the yield of coke oven gas by-products, and aggravates the corrosion and deposition of pipelines At the same time, it will also bring hidden dangers to environmental protection. Therefore, a good separation of tar / ammonia water has a positive impact on the coking recovery process

[0003] At present, the commonly used oil-water separation methods mainly include: static heating method, this method will bring out the light components in coal tar, and the storage tank occupies a large area; centrifugal separation method, this method has a small processing capacity, The operating cost is quite high, and it does not have the conditions for wide application; the microwave radiation method applies microwave radiation technology to emulsion demulsification. This method is currently limited to the indoor research stage because microwave equipment is difficult to popularize; the chemical method is characterized by flexible use and is widely used in Chemical agents are added during the production process to improve the separation degree of tar / ammonia water and reduce the viscosity of tar, which not only achieves dewatering foam but also prevents the deposition of tar contained in circulating ammonia water in the equipment, and can reduce CODCr and other pollutants in ammonia distillation wastewater. Improve the efficiency of coking wastewater treatment, but the price of general chemical agents is higher

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