High pressure pumps for urea production

Urea is one of the world's most important and widely produced chemicals, production volumes total about 200 tons per year. The production volume is about 200 million tons per year. Urea is used in a number fields, including fertilizers, medical applications, and even in food production. Demand will continue to rise in the coming years as a result of the growing world population.

In the manufacturing process liquid ammonia and carbamate need to be pressurized. This task is performed by URACA high-pressure pumps. They are highly efficient and reliably meet the requirements of these critical chemicals.

Our services for your benefit

  • large plant capacities of 5000 MTPD can be realized
  • URACA has over 60 years of experience in this field
  • robust, durable high-pressure pumps
  • maximum service life of wearing parts
  • reliable operation thanks to the conservative design of the pumps
  • low load on the moving components
  • maintenance-friendly design
  • high efficiency of 94 to 97 percent
  • flow rate precisely adjustable by speed regulation is possible

The manufacturing process

For the production process of technical urea, ammonia and carbon dioxide are used in the so-called Haber-Bosch process. In a high pressure reactor, the ammonia reacts with the carbon dioxide in an exothermic reaction to form ammonium carbamate. Carbamate represents an intermediate stage in the manufacturing process and reacts endothermically to urea and water in a further process step.

In order to press ammonia and the intermediate carbamate into the reactor, high pressure is necessary. The high-pressure pumps must deliver operating pressures of 140 to 240 bar. At the same time, large plants require ammoniac flow rates of 2,000 liters per minute or higher.

The pumps work in hard 24-hour continuous operation and require maintenance for long periods of time. Carbamate is very aggressive and corrosive. High process temperature up to is required to keep the carbamate in a liquid state of aggregation. Crystallation of the process media in the sealing area of the liquid end must be avoided at all cost.

The design of the ammonia pump must take into account the special properties of a liquefied gas. Liquid ammonia has poor lubricating properties and has higher compressibility than water. Operational reliability is extremely important. When ammonia is released, a huge volume of gas is created, displacing oxygen and freezing the surroundings. This represents an extreme risk to all persons in the immediate vicinity.

As one of the most important chemicals, urea is used in many areas of daily life:

  • Nitrogen fertilizer - which secures the diet of the world's population and is based on urea
  • Exhaust aftertreatment in internal combustion engines and industrial plants - urea injected into the exhaust gas stream (AdBlue®) reduces toxic nitrogen oxides
  • Chemical industry urea is the starting material of many manufacturing processes (e.g. melamine, glues, resins and binders for the wood industry)
  • Further uses: Additive in feed, substitute for road salt, stabilizer in food or moisturizer in cosmetics

High pressure pumps are faced with extreme demands in urea production. They must deliver high operating pressures, cope with the ammoniac and carbamate media and ensure safe, environmentally friendly production processes.

URACA is your competent partner for urea production and supplies high-quality plunger pumps for plants of different sizes. Contact us now and let our experts advise you.