Series-wound type poly-generation technology for coal chemical industry

Abstract

The invention discloses a series-wound type poly-generation technology for coal chemical industry, wherein the coal gasification is taken as the source and a chemical process and a power system are connected in series to form an upstream-and-downstream optimal combination. After undergoing the cooling and purification process, raw gas is directly subjected to a synthetic reaction to produce chemical products. Unreacted gas is divided into recycle gas and unrecycled gas: based on the technology of adjusting non-synthetic gas and appropriately recycling unreacted gas, the recycle gas undergoes syngas adjustment to raise the ratio of H2 to CO and then is mixed with the new synthetic gas so as to make the components of the synthetic gas more close to the chemical dose ratio required by the chemical reaction; and the unrecycled gas undergoes the preheating and swelling treatment and then sent to a gas-steam combined-cycle power generation system. The system adopted in the invention includes a space division unit, a synthetic gas preparation unit, a sensible heat recycle unit, a purification unit, a synthesis unit, a conversion unit and a power generation unit. The production technologyprovided by the invention can raise energy utilization efficiency, reduce investment and cost and markedly enhance economic performance.

Description

Technical field: [0001] The invention belongs to the technical field of energy power and chemical engineering, and relates to a series polygeneration process of coal chemical industry, in particular to an optimized integration of coal-based energy and chemical process for efficient use of materials and energy, forming chemical, electric, thermal, etc. A new process for joint production of multiple products. Background technique: [0002] my country's energy structure has been dominated by coal for a long time, and fundamental changes are unlikely to occur in the next few decades. However, coal, as a non-renewable resource, has been exploited in large quantities, and the energy crisis has become increasingly severe. A very effective way to reduce investment, alleviate energy crisis, save energy and reduce emissions in the future is to implement coal chemical polygeneration technology. The existing coal chemical cogeneration process generally adopts the process of parallel co...

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Problems solved by technology

However, the simple coal chemical series polygeneration process has some unreacted gas, and the product synthesis rate is lower than that of the independent system, so the polygeneration purpose of maximizing the production capacity of the device has not been exerted.

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