Production method of high efficiency Fe dispersing agent of high pressure boiler

Abstract

The invention relates to a production method of high efficiency Fe dispersing agents of a high pressure boiler. The production method comprises the following steps: at first, carrying out the production of isopropenyl phosphonic acid (IPPA), then adding acetic anhydride into a reaction kettle filled with finished IPPA, controlling the temperature and dripping prepared BPO (benzoyl peroxide) solution in the reaction filled with the IPPA and acetic anhydride, preserving heat after finishing the dripping, stirring uniformly and pumping water into the reaction kettle under the negative pressure, controlling the temperature and outwards steaming under the negative pressure, supplementing purified water and discharging finishing the steaming, and synthetizing the raw material (namely IPPA) with the recovered acetic acid. The production method is a production line advanced in process, safe in operation, high in economic benefit, and low in environmental pollution and production cost, can recycle the raw material, and can meet the social requirement and the environmental requirement.

Description

technical field [0001] The invention belongs to the technical field of industrial circulating cooling water treatment, and in particular relates to a production method of a high-efficiency iron dispersant for a high-pressure boiler. Background technique [0002] The previous concern with hardness scaling in high pressure industrial steam systems (6.2-11.7MP) has been replaced by iron deposition. Because iron deposits reduce heat transfer efficiency and cause under-deposit corrosion. Coordinated phosphate treatment reduces the risk of under-deposit corrosion but rarely migrates iron out of the furnace. Studies have shown that the vast majority of iron pollutants in boilers are carried from feed water and condensate water. Proper purification and management of these waters can significantly alleviate the problem of iron deposition, but for steam lines with several miles long The cost of pretreatment is high for industrial systems with characteristics such as low concentratio...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the invention patent US4446046 provides the production method of polyisopropylenephosphonic acid (PIPPA) and its monomer isopropylenephosphonic acid (IPPA). Phosphate, after stirring for 4.5 hours, add acetic acid, stir overnight at room temperature, then distill at 118°C-190°C to remove hydrogen chloride, acetyl chloride and acetic acid. This method requires too long synthesis time and high temperature requirements, and further improvement of the process is required; The patent provides two synthetic methods of PIPPA: put IPPA into the kettle, add ethyl acetate, stir evenly, add benzoyl peroxide solution, keep warm and drop for 6-7 hours, and finally cool down to get the product. In this method, ethyl acetate is used As a solvent, the experimental effect is not good; in addition, PIPPA is synthesized by water method, and perammonium is used as the initiator. The experiment proves that the polymerization effect is not good and the yield is low.

[0004] Although polyisopropylenephosphonic acid is a high-efficiency iron dispersant for high-pressure boilers, its synthetic raw materials are relatively cheap, but due to the difficulty in temperature control during the production process of its raw materials, it is easy to splash and has a high risk factor; the packaging requirements for raw materials are too strict; During the production process of isoacrylphosphonic acid, the materials are easily exposed to the environment, which has varying degrees of impact on the environment and the human body; there are a series of problems such as the waste is not easy to handle, and polyisoacrylphosphonic acid is not industrially produced at home and abroad, but There is a great demand for this product at home and abroad. Therefore, designing a production method with simple operation procedures, safety, stability, high efficiency, zero discharge of waste and realization of recycling can greatly meet the needs of the society and the requirements of the environment.