Waltai plans to invest 1.153 billion yuan in a project to produce 120,000 tons of amino resins per year

In October 2022, Anhui Huartai Chemical Co., Ltd. held a ceremony to mark the start of the energy-saving and environmental-protection upgrade project for ammonia synthesis. The energy-saving and environmental protection upgrade project for ammonia production at Anhui Huarte uses HT-L pressurized continuous coal gasification; Co-Mo isomeric sulfur-tolerant shift reaction to adjust the hydrogen-to-carbon ratio; low-temperature methanol washing for desulfurization and decarburization. Part of the hydrogen gas obtained after desulfurization and decarburization is sent to the ammonia synthesis unit in the plant after being washed with liquid nitrogen and compressed, while another portion of this hydrogen gas is sent for PSA adsorption purification. The total ammonia capacity is 120,000 tons per year. The project construction period is planned to be 24 months. It is expected to be completed and put into operation by December 2024. Of this, 120,000 tons are synthetic ammonia, and 22,000 m3/h of hydrogen with a purity of 99.9%. In July 2022, the Management Committee of Dongzhi Economic Development Zone made public the draft environmental impact assessment report for Anhui Huartai Company’s project aimed at improving energy efficiency and reducing environmental impact in ammonia production.

According to the publicly released environmental impact assessment report, Huarte Company currently has production facilities with an annual capacity of 120,000 tons of amino alcohol, 250,000 tons of concentrated nitric acid, 600,000 tons of sulfuric acid, 30,000 tons of melamine, 10,000 tons of sodium nitrate/sodium nitrite; 150,000 tons of hydrogen peroxide in the first phase, 50,000 tons of formaldehyde, 20,000 tons of amino resin membranes; 150,000 tons of hydrogen peroxide in the second phase, and 10,000 tons of morpholine. A facility is being built with an annual production capacity of 20,000 tons of electronic-grade hydrogen peroxide and 20,000 tons of benzidine, as well as 3 sub-high temperature and sub-high pressure circulating fluidized bed boilers of 75 t/h each, along with a cogeneration unit comprising 1 set of 12 MW and 1 set of 6 MW back-pressure steam turbine generators. The existing ammonia synthesis unit in the plant can supply 35,400 m³/h of hydrogen gas as raw material. The ammonia synthesis plant area currently has 1 hydrogen extraction unit using a purge gas membrane process with a capacity of 800 m³/h, 1 pressure swing adsorption hydrogen extraction unit with a capacity of 5000 m³/h, and another pressure swing adsorption hydrogen extraction unit with a capacity of 7000 m³/h. There is also 1 pressure swing adsorption hydrogen extraction unit under construction, with a capacity of 10000 m³/h. It is mainly used for hydrogen extraction from the vent gas in ammonia synthesis plants (800 m³/h), hydrogen extraction in the first-phase hydrogen peroxide project (2950 m³/h), hydrogen extraction in the second-phase hydrogen peroxide project (3750 m³/h), hydrogen extraction in the morpholine project (20 m³/h), hydrogen extraction in the under-construction diamine project (3450 m³/h), and hydrogen extraction in the under-construction cyclohexylamine project (5310 m³/h). After the implementation of the second-phase projects for hydrogen peroxide, morpholine, benzene diamine, and cyclohexylamine, the amount of hydrogen available for ammonia and methanol production will be 19,920 m³/h. The operating time for the ammonia synthesis, hydrogen peroxide, morpholine, and benzene diamine units is 8000 hours, while that for the cyclohexylamine unit is 7200 hours. Therefore, the hydrogen supply to the ammonia synthesis unit in the ammonia synthesis gas production section is 163608000 m³/h (the hydrogen consumption for both ammonia synthesis and crude methanol production is 2360 m³ per ton of product).

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