Coal pyrolysis poly-generation device coal gas and high-temperature fly ash waste heat utilizing system

Abstract

A coal pyrolysis polygeneration device gas and high-temperature fly ash waste heat utilization system, a pyrolysis furnace economizer, a high-temperature electric dust collector and a coal gas tar cooling separation system are arranged between the coal pyrolysis polygeneration device pyrolysis furnace The high-temperature ash heat exchanger realizes the full utilization of the waste heat of coal pyrolysis high-temperature gas and the physical sensible heat of high-temperature fly ash, and improves the system efficiency; the economizer of the pyrolysis furnace and the economizer of the combustion furnace are arranged in parallel, and by adjusting the The proportion of feed water flow can overcome the fluctuation of pyrolysis furnace reaction temperature to the temperature of combustion furnace feed water and the working temperature of gas electrostatic precipitator, so as to ensure the efficiency of gas dust removal device, prevent tar condensation from clogging pipes, improve the quality of tar products, and improve the stability of system operation; By arranging pyrolysis furnace economizers, high-temperature electric dust collectors, and high-temperature ash heat exchangers, spray washing and dust removal devices are omitted, and system water consumption and sewage treatment costs are reduced.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of waste heat of coal gas, and in particular relates to a waste heat utilization system of gas and high-temperature fly ash of a coal pyrolysis polygeneration device. Background technique [0002] my country is rich in coal resources, and its current annual coal output ranks first in the world. However, the traditional coal utilization is mainly for combustion power generation, combustion heat supply, etc. The utilization method is rough, the comprehensive utilization rate of coal resources is low, and at the same time, more air pollutants are emitted, which has a negative impact on the atmospheric environment. Coal is composed of macromolecules with extremely complex structures containing C, H, O, N, S and other elements. Direct combustion of coal only utilizes the fixed carbon in it, and other components with chemical properties such as volatile matter have not been effectivel...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a coal pyrolysis polygeneration plant gas and high-temperature fly ash waste heat utilization system, which solves the waste heat utilization problem of coal pyrolysis gas and high-temperature ash, and improves the system efficiency. The efficiency of the system reduces the water consumption and sewage treatment costs of the system, and also solves the problem that the gas supercooled tar is easy to block the pipeline. In addition, by controlling the heat exchange water supply, the problem of heat absorption changes caused by pyrolysis temperature changes can be solved. Ensure stable and efficient operation of dust removal equipment

Images