Abstract: A urea production plant including a synthesis and recovery section has a first evaporation section connected with the synthesis and recovery section and a first condensation section. A granulation section is connected to the first evaporation section. A scrubbing section is connected to the granulation section. A second evaporation section is connected to the scrubbing section. The second evaporation section is connected to the granulation section. A second condensation section is connected to the second evaporation section. A quenching section includes a liquid inlet for the distribution of a quenching liquid is located and connected between the granulation section and the scrubbing section and the quenching section is connected to a quenching liquid providing section and the second condensation section.

Abstract: An exhaust air scrubber for removing dust, abraded product, and water-soluble constituents from process exhaust air may include in a single housing a cleaning stage that includes a droplet separator and a packing disposed below the droplet separator. The exhaust air scrubber may also include an inlet apparatus for process exhaust air disposed in a lower portion of the housing, a withdrawal apparatus for scrubbing solution, and a withdrawal conduit for cleaned exhaust air, with the withdrawal conduit beginning inside the housing above the cleaning stage, passing downward inside the housing, and passing out of the housing to an outside in the lower portion of the housing below the cleaning stage. The scrubber may further include a feed conduit for scrubbing solution in an upper portion of the housing above the cleaning stage.

Abstract: A urea production plant including a synthesis and recovery section has a first evaporation section connected with the synthesis and recovery section and a first condensation section. A granulation section is connected to the first evaporation section. A scrubbing section is connected to the granulation section. A second evaporation section is connected to the scrubbing section. The second evaporation section is connected to the granulation section. A second condensation section is connected to the second evaporation section. A quenching section includes a liquid inlet for the distribution of a quenching liquid is located and connected between the granulation section and the scrubbing section and the quenching section is connected to a quenching liquid providing section and the second condensation section.

Abstract: The present disclosure relates to a method and a device for cooling a solid, in particular a hygroscopic bulk material, in a more energy-efficient manner. For this purpose, an air flow is, if needed, cooled and/or dehumidified and/or subsequently heated in order to reduce the relative humidity of the air flow. The cooling air flow conditioned in this manner is then used in a contact device for cooling the solid, and a heated exhaust air flow is drawn from the contact device. According to the invention, a part of the exhaust air flow is mixed with the air flow in order to pre-heat the air flow and thus reduce the relative humidity of the air flow. In addition, a second part of the exhaust air flow can be mixed with feed air and used in a separate second contact device in order to pre-cool the solid.

Abstract: The present disclosure relates to a method and a device for cooling a solid, in particular a hygroscopic bulk material, in a more energy-efficient manner For this purpose, an air flow is, if needed, cooled and/or dehumidified and/or subsequently heated in order to reduce the relative humidity of the air flow. The cooling air flow conditioned in this manner is then used in a contact device for cooling the solid, and a heated exhaust air flow is drawn from the contact device. According to the invention, a part of the exhaust air flow is mixed with the air flow in order to pre-heat the air flow and thus reduce the relative humidity of the air flow. In addition, a second part of the exhaust air flow can be mixed with feed air and used in a separate second contact device in order to pre-cool the solid. The invention also relates to a system for carrying out the method.

Abstract: The invention is directed to a process for the removal of ammonia from an ammonia-containing gas stream by treating the ammonia in the ammonia-containing gas stream with an acid, during which treatment an aqueous stream comprising an ammonium salt, wherein the aqueous stream comprising the ammonium salt is treated with electrodialysis, whereby the acid is recovered and an aqueos stream comprising an ammonium hydroxide salt is formed.

Abstract: The invention is directed to a process for the removal of ammonia from an ammonia-containing gas stream by treating the ammonia in the ammonia-containing gas stream with an acid, during which treatment an aqueous stream comprising an ammonium salt, wherein the aqueous stream comprising the ammonium salt is treated with electrodialysis, whereby the acid is recovered and an aqueos stream comprising an ammonium hydroxide salt is formed.

Abstract: The invention is directed to a process for the removal of ammonia from an ammonia-containing gas stream by treating the ammonia in the ammonia-containing gas stream with an acid, during which treatment an aqueous stream comprising an ammonium salt, wherein the aqueous stream comprising the ammonium salt is treated with electrodialysis, whereby the acid is recovered and an aqueous stream comprising an ammonium hydroxide salt is formed.

Abstract: The invention is directed to a process for the removal of ammonia from an ammonia-containing gas stream by treating the ammonia in the ammonia-containing gas stream with an acid, during which treatment an aqueous stream comprising an ammonium salt, wherein the aqueous stream comprising the ammonium salt is treated with electrodialysis, whereby the acid is recovered and an aqueous stream comprising an ammonium hydroxide salt is formed.