Combined dust removal and desulfurization system for coal gas

Abstract

The invention relates to a combined dust removal and desulfurization system for coal gas. The combined dust removal and desulfurization system comprises a circulating pump, a reaction tank, a gas inlet pipeline and a gas outlet pipeline, wherein alkaline eluent is held in the reaction tank; the reaction tank is partitioned into a first chamber, a second chamber and a third chamber through a rectifying plate and a water gate type partition plate; the rectifying plate is arranged between the first chamber and the second chamber; the water gate type partition plate is arranged between the second chamber and the third chamber; the height of the water gate type partition plate is less than the height of the cavity of the reaction tank; the upper end of the first chamber of the reaction tank is connected with the gas inlet pipeline; the upper end of the second chamber of the reaction tank is connected with the gas outlet pipeline; the lower end of the third chamber of the reaction tank is connected with a liquid inlet of the circulating pump through a circulating pipeline; a liquid outlet of the circulating pump is connected with a diffuser nozzle in the gas inlet pipeline; the bottoms of the first chamber and the second chamber of the reaction tank are provided with sludge discharge ports; a dryer is arranged in the gas outlet pipeline; the rear end of the dryer is provided with a heating pipe. The system integrates dust removal and desulfurization functions, has a simple structure, is easy to operate, can effectively solve the problem of coal gas purification and is an environment-friendly high-efficiency dust removal and desulfurization system.

Description

technical field [0001] The invention relates to an environmental protection device, in particular to a combined dust removal and desulfurization device of an integrated gasification combined cycle (IGCC) power generation system. Background technique [0002] The gas turbine cannot directly use the crude gas produced by the gasifier, so the crude gas must be purified. At present, most IGCC power generation systems divide the purification of crude gas into two parts, dust removal and desulfurization, which make the purification process cumbersome and costly. In the dust removal method, the dry dust removal adopts the electric field dust removal, although the dust removal efficiency is increased, but the investment is large, the temperature measuring element in front of the core component evaporative cooler is vulnerable, consumables, and the entire control system is relatively complicated and requires high technical requirements. The application of wet dedusting in my countr...

AI Technical Summary

Problems solved by technology

However, the crude gas obtained after coal gasification treatment must be purified before it can be supplied to the gas turbine for combustion, otherwise it will cause various hazards such as blockage, wear and corrosion to the subsequent gas-steam power generation equipment

The purification treatment process mainly includes two aspects of dust removal and desulfurization. In the existing IGCC process, dust removal and desulfurization are mostly treated separately, the equipment is relatively complicated, and the energy consumption is relatively large. In order to better solve the problem of IGCC crude gas purification and respond to people's environmental The call for protection, the present invention proceeds from the basic points of high efficiency, energy saving and environmental protection, and combines the current widely concerned energy conservation issues, and invents a set of combined dust removal and desulfurization devices for gas, which solves energy conservation and desulfurization at the same time. environmental protection issues

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