The coal chemical project invested 7.8 billion yuan in Xinjiang Xinxinxiang will use 7 second-generation Jinhua furnaces
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It was recently learned that the project of Xinjiang Xinlianxin Chemical Industry Co., Ltd., which has an annual production capacity of 320,000 tons of melamine and 500,000 tons of compound fertilizers, uses Jinhua furnaces. Three Jinhua furnaces (two in operation and one as backup) for Phase 1, and four Jinhua furnaces (three in operation and one as backup) for Phase 2. Vaporization pressure is 6.5 MPa, and the gas volume per furnace is 130,000 m3/h (CO+H2). Xinjiang Xinlianxin Energy and Chemical Co., Ltd. plans to build a project in the Xiheshan Industrial Park of the Zhundong Economic and Technological Development Zone, with an annual production capacity of 320,000 tons of melamine and 500,000 tons of compound fertilizers. The construction materials include melamine, polyoxymethylene, and caprolactam. Using coal as raw material, this project produces products such as compound fertilizers, melamine, and high-purity carbon dioxide through processes including gasification, shift reaction, low-temperature methanol washing, liquid nitrogen washing, and ammonia synthesis. An annual production capacity of 320,000 tons of melamine and 500,000 tons of compound fertilizers. The project will be constructed in three phases. In Phase 1, 160,000 tons per year of melamine and 250,000 tons per year of compound fertilizer will be produced. In Phase 2, the capacity will be 160,000 tons per year for melamine, 250,000 tons per year for compound fertilizers, and 120,000 tons per year for polyoxymethylene. In Phase 3, 600,000 tons of caprolactam and nylon 6 will be produced.
Xinjiang Xinlianxin Chemical Industry Co., Ltd.’s project to produce 320,000 tons of melamine and 500,000 tons of compound fertilizers per year. Nature of the construction: new construction. Constructor: Xinjiang Xinlianxin Chemical Industry Co., Ltd.; Location of construction: Xiheshan Industrial Park within the Zhundong Economic and Technological Development Zone in Xinjiang. Project investment: 781,809 million yuan for the engineering aspects, and 557,300 million yuan for environmental protection measures. Labor force and working hours: 700 employees; operation on four shifts, 8 hours per shift, with 333 days of production per year, totaling 8,000 hours. Implementation plan: construction period of 36 months. Scope of construction and product output: (1) Process production facilities: raw material storage and transportation systems, air separation units, gasification plants, shift conversion units, low-temperature methanol washing units, liquid nitrogen washing units, ammonia synthesis units, melamine production units, compound fertilizer production units, sulfur recovery units, and high-purity carbon dioxide production units. (2) Supporting utility systems, auxiliary production facilities, and service facilities: Supporting utility systems include power stations, main substations, circulating water systems, sewage treatment plants, fire stations, desalination plants, water purification plants, etc. Auxiliary production facilities include central control rooms, analysis and testing buildings, tank areas and storage and transportation systems, as well as plant flares. Service facilities include office buildings and R&D centers, as well as dormitories for shift workers. Construction details: Gasification unit: Jinhua Furnace second-generation gasification technology； Slurry preparation unit, gasification unit, slag treatment unit, along with corresponding utility systems for conversion and heat recovery: The conversion and heat recovery unit utilizes a Co-Mo-based conversion system, a condensate stripping system, and a heat recovery system ； Catalyst regeneration: adiabatic conversion in the first stage and isothermal conversion in the second stage. Low-temperature methanol washing: a physically based absorption method with low energy consumption – the low-temperature methanol washing process ； Gas cooling and methanol washing, methanol flashing and recovery of the flashed gas, acidic gas flashing, HS concentration and nitrogen stripping, thermal regeneration of methanol, methanol dehydration, exhaust gas washing; Liquid nitrogen washing: Hangzhou Zhongtai Liquid Nitrogen Washing Technology ； Sulfur recovery units: first-stage high-temperature Claus thermal reaction, three-stage low-temperature combustion furnaces, converter systems, cooling, sulfur granulation and packaging, catalytic Claus process; cryogenic liquid nitrogen is used for final purification of gas molecular sieve adsorbers, cryogenic chambers, nitrogen washing towers, and hydrogen separation units ； Exhaust gas separation system for ammonia synthesis plants: utilizes patented Casale synthesis tower technology ； Construction of syngas compression and ammonia synthesis units, as well as refrigeration units for high-purity carbon dioxide. Use of energy-efficient distillation processes for purifying raw gas; compression systems, purification systems, and ammonia refrigeration systems. An energy-saving full-circulation process for preparing carbon dioxide solutions. Processes for compressing carbon dioxide and ammonia, synthesizing urea, carrying out recycling cycles, evaporation, processing condensates, and supporting facilities. For melamine production: use of the latest generation of Melamine Synthesis technology from Italian company OTEC, including exhaust gas washing and condensation, purification of melamine solutions, crystallization of melamine, separation and drying of crystals, recovery and recycling of ammonia, water treatment and recycling, molten salt heating systems. For air separation: use of Hangyang’s compressed air boosting and cyclic expansion air compression systems, air pre-cooling, air purification, air separation, storage and vaporization of liquid fluid products, etc. In the field of coal chemical industry: high-tower granulation process for compound fertilizers, including granulation, screening, cooling, and packaging systems
Third-generation technology has been in use for seven or eight years now; why is second-generation technology still being used?
I mean, is it because of the different types of coal? ? ?
Ten years of rapid development in chemical technology – praising the prosperous and strong China of today
【Ten Years of Great Development in Chemical Technology】161- The world’s first project utilizing industrial waste gas from ferroalloy production to produce fuel ethanol went into operation in Ningxia in 2021. https://bbs.hcbbs.com/thread-4344922-1-1.html (Source: Haichuan Chemical Engineering Forum)
The technical features of the third generation of Jinhua furnaces are: good adaptability to different coal types, high gasification pressure, a safe ignition system, significant investment advantages, and environmental friendliness. Its lower part is directly connected to the radiation waste boiler, enabling the production of one ton of steam per ton of coal used, as well as operation over long periods of time.
Has anyone used a single-nozzle coal-water slurry injector with a capacity of 130,000 Nm³/h?
Isn’t it calculated based on the amount of coal fed now?