Configuration of crude gas purification process for chemical product co-production methods?
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Utilizing large-scale gasification for the production of chemical products: 1. For the production of synthetic ammonia as a single product, the typical configuration for purifying the crude synthesis gas is as follows: 1.1 High-configured process: 1.1.1. Sulfur-tolerant deep conversion + low-temperature methanol washing for desulfurization and decarburization + liquid nitrogen washing + ammonia synthesis; 1.1.2. Desulfurization using low-temperature methanol washing + deep conversion + decarburization using low-temperature methanol washing + liquid nitrogen washing + ammonia synthesis. 1.2 Medium-configured process: Sulfur-tolerant deep conversion + low-temperature methanol washing for desulfurization and decarburization + methanation + ammonia synthesis. 1.3 Low-configured process: Sulfur-tolerant deep conversion + NHD + methanation + ammonia synthesis. 2. For the production of methanol as a single product, the typical configuration for purifying the crude synthesis gas is as follows: 2.1 High-configured process: Partial sulfur-tolerant conversion + low-temperature methanol washing for desulfurization and decarburization + further desulfurization + methanol synthesis. 2.2 Medium-configured process: Partial sulfur-tolerant conversion + wet desulfurization + thermal potassium-alkali decarburization + further desulfurization + methanol synthesis. 2.3 Low-configured process: Rough desulfurization + partial conversion + thermal potassium-alkali decarburization + further desulfurization + methanol synthesis. 3. Among these, the one-step low-temperature methanol washing method is the most common in high- and medium-configured processes, while the two-step method is often criticized. 4. If gasification facilities are expanded to produce a variety of downstream products, it helps to mitigate market risks. 4.1. When the products are methanol and synthetic ammonia, the proportions of these two products can be adjusted within a certain range (1–3). What is the optimal configuration for purifying the crude synthesis gas in such cases? 4.2. If the products are methanol + synthetic ammonia + industrial hydrogen, how should the purification process for the crude synthesis gas be optimized? 4.3. If the products are synthetic ammonia + industrial hydrogen + high-purity CO, how should the purification process for the crude synthesis gas be optimized? I earnestly request advice from those who are experts. Thank you. The prospects or possibilities of applying the co-alcohol process, invented by China’s medium and small-scale gasification enterprises, to large-scale facilities are not discussed in this topic. This post was last edited by Tianya Langji on 2009-3-14 at 10:10.]
Additional conditions: 1. Coal gasification: 1.1. Capacity: 3,000–4,000 tons of coal per day. 1.2. CO+H2 output: 240,000–340,000 Nm3/h. 1.3. Composition of the crude syngas: CO – 63% (on a dry basis), H2 – 22% (on a dry basis); water vapor content: 17%–23%. 2. Maximum capacity for ammonia production: 1,200 tons per day. 3. Maximum capacity for methanol production: 1,500 tons per day. 4. Maximum capacity for industrial hydrogen production: 80,000 Nm3/h. 5. Maximum capacity for CO production: 20,000 Nm3/h. Thank you
Additional conditions: 1. The crude syngas purification unit should be designed as a very large-scale integrated facility. 2. The concentration of high-purity CO is to be achieved using PSA; thus, the crude syngas must first be desulfurized. 3. Industrial hydrogen requires desulfurization, decarburization, and reduced nitrogen content
It’s cold in spring; being neglected makes it even colder. If there is a response, please ask the moderator to delete this post, so it won’t be considered spam :lol