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首页> 外文会议>Annual international Pittsburgh coal conference >PROGRAM TOPIC: POWER PLANTS - INNOVATIVE NEW CYCLE ANALYSIS OF AN INTEGRATED MILD/PARTIAL GASIFICATION COMBINED CYCLE (IMPGC) POWER PLANT
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PROGRAM TOPIC: POWER PLANTS - INNOVATIVE NEW CYCLE ANALYSIS OF AN INTEGRATED MILD/PARTIAL GASIFICATION COMBINED CYCLE (IMPGC) POWER PLANT

机译：计划主题：电厂-轻度/部分气化联合循环（IMPGC）电厂的创新性新循环分析

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Coal gasification technologies via Integrated Gasification Combined Cycles (or IGCC) have been used as one of the most promising clean coal technologies that raise the power plant efficiency with a more effective pre-combustion gas cleanup process, leading to cleaner emissions that match those of natural gas fired power plants. One of the major energy losses that occur in IGCC is during syngas cooling, as the existing commercial gas cleanup processes must occur at low temperature, wasting a lot of useful heat energy (exergy) in the meantime, even though part of the energy is recovered later. This also leads to a loss of chemical energy, as the volatile matters within the feedstock must be cracked down to the simplest and lightest carbon- and hydrogen-based compounds (mostly CO and H_2 with the occasional amount of CH_4 and C_2H_2) to avoid the condensation of larger compounds (such as tars) that would potentially damage the system. With the advent of a new "warm gas clean-up" (WGCU) process developed by Research Triangle Institute (RTI), the gases can be cleaned at much higher temperatures than they otherwise could be using traditional cleaning systems. This, in turn, means that fully cracking the volatile matters down to CO and H_2 (full gasification) is not necessary. Rather, mild gasification can be used to preserve the high amounts of chemical energy in the volatile matters, and produce a syngas with around twice the heating value of conventional fully-gasified syngas. In addition, partial gasification can be used to preserve the char fines so that they can be used with existing pulverized coal power plants. Furthermore, due to the small size of the mild gasifier compared to a full-sized entrained-flow gasifier, it is possible to engineer a system that can most economically and conveniently be retrofitted onto existing pulverized coal (PC) plants to boost their efficiency and reduce emissions without replacing the entire power plant. The resulting combined cycle system is called the Integrated Mild-Partial Gasification Combined (IMPGC) Cycle, and the benefits of such a system are analyzed and discussed in this paper for new plans. Retrofitting old power plants will be presented in a future paper.
机译：通过整体气化联合循环（IGCC）的煤气化技术已被用作最有前途的清洁煤技术之一，该技术通过更有效的燃烧前气体净化工艺提高了电厂的效率，从而产生了与自然排放量相当的清洁排放量燃气发电厂。 IGCC中发生的主要能量损失之一是在合成气冷却过程中，因为现有的商业气体净化过程必须在低温下进行，尽管浪费了一部分能量，但同时却浪费了大量有用的热能（火用）之后。这也导致化学能的损失，因为必须将原料中的挥发性物质分解为最简单，最轻的基于碳和氢的化合物（大多数为CO和H_2，偶尔还有CH_4和C_2H_2的量），以避免较大的化合物（例如焦油）的冷凝可能会损坏系统。随着三角研究所（RTI）开发的一种新的“暖气净化”（WGCU）工艺的出现，与传统的清洁系统相比，它们可以在更高的温度下进行净化。反过来，这意味着不需要将挥发性物质完全裂化为CO和H_2（完全气化）。而是，温和的气化可用于保留挥发性物质中的大量化学能，并产生具有常规完全气化的合成气发热量约两倍的合成气。此外，可以使用部分气化来保留炭粉，以便将其与现有的粉煤发电厂一起使用。此外，由于与全尺寸气流床气化炉相比，温和气化炉的尺寸较小，因此可以设计一种系统，以最经济，最方便的方式将其改造为现有的粉煤（PC）厂，以提高其效率和效率。减少排放而无需更换整个发电厂。由此产生的联合循环系统称为轻度-部分气化联合循环（IMPGC），该系统的优点在本文中针对新计划进行了分析和讨论。将来的论文中将介绍旧电厂的改造。

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