Pujie Neng Hua developed carbon and ammonia capture device to solve the problem of acid gas pipeline crystallization

It was learned on May 13 that the carbon and ammonia capture device independently developed by Pucheng Clean Energy Chemical Co.
, Ltd.
solved the technical problem of carbon and ammonia crystallization in the acid gas pipeline by capturing and producing ammonia in methanol in the low-temperature methanol washing system.
, filling the gap in the coal chemical industry at home and abroad
.

It is reported that the shift gas entering the low-temperature methanol wash from the shift device contains a trace amount of ammonia.
When the accumulation reaches a certain level, under the existing temperature and pressure, the acid gas pipeline with carbon dioxide and hydrogen sulfide as the main components is easy to form The crystallization of carbon and ammonia will block the pipeline and equipment, affect the regeneration effect of methanol, and cause the hydrogen sulfide in the purified gas at the top of the methanol washing machine to exceed the standard, resulting in poisoning and deactivation of the synthesis catalyst
.
At the same time, the acid gas by-produced in the low-temperature methanol washing system cannot be sent out, resulting in the operation of the sulfur recovery system with reduced load and causing certain environmental pollution
.

To this end, the R&D team of the methanol center of Pujieneng Chemical Co.
, Ltd.
collected a large amount of historical operation data, carried out research and research, and innovatively proposed a new concept of carbon ammonia trap
.
By repeatedly assuming the model and verifying it in practice, the equipment and process flow diagram of the carbon-ammonia trap is determined and completed
.
The device adopts the principle of "throttle effect", instead of the traditional methods of partial replacement of methanol, hot cleaning of acid gas pipelines, etc.
, and uses internal energy to reduce the temperature, which is more conducive to the crystallization of carbon and ammonia, and captures it
.
On November 5, 2021, "A method for capturing and extracting ammonia in a low-temperature methanol washing system" was authorized by the national invention patent
.

After the carbon and ammonia trap was put into use in June 2020, after several debugging optimizations and internal upgrades, it became stable in January 2021 and has been running continuously for 13 months, with obvious energy-saving effects
.
According to statistics, at least 2,000 tons of methanol can be saved every year, equivalent to about 4 million yuan
.