Waste heat recovery system of quenching tower

Abstract

The invention discloses a waste heat recovery system of a quenching tower. The waste heat recovery system comprises water inlet pipelines, the quenching tower and a water outlet pipeline. The water inlet pipelines comprise a supply water pipeline and a cleaning water pipeline; the quenching tower comprises a waste heat recovery device, a cleaning pipe and an induced draft fan; a supply water inlet is formed in the head end of the supply pipeline, and the tail end of the supply water pipeline is connected with one end of the waste heat recovery device. A cleaning water inlet is formed in the head end of the cleaning water pipeline, and the tail end of the cleaning water pipeline is connected with the cleaning pipe. The head end of the water outlet pipeline is connected with the other end of the waste heat recovery device, and a hot water outlet is formed in the tail end of the water outlet pipeline. The problem of recovery and dust removal of a large amount of heat generated during quenching of the quenching tower of a coke plant is solved. The utilization rate of energy is increased by recycling heat in steam, discharged dust is reduced, dual indexes of energy saving and environmental protection are achieved, and economic benefits and social benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of coking production heat energy, and in particular relates to a coke quenching tower waste heat recovery system. Background technique [0002] With the proposal of a harmonious society and sustainable development strategy, environmental pollution and clean and efficient use of resources have become the primary concerns of people. In my country's energy structure, coal occupies a dominant position, and the clean and efficient utilization of coal has become the top priority of the development of modern society, which is of great significance to the realization of my country's high-efficiency, energy-saving and environmentally friendly production. Coal pyrolysis is the basis of clean coal utilization and an important step in coal gasification, liquefaction, refining and other processes, which can produce semi-coke (also known as semi-coke), coal tar and raw coal gas. [0003] Howe...

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Problems solved by technology

[0003] However, as far as the current coke production process is concerned, the coke will have a high heat after it is released from the furnace, that is, the coke is in a state of redness and heat, and it needs to be cooled and quenched by water sprayed in the coke quenching tower. A large amount of saturated steam and dust will be produced. The saturated steam has heat. If the saturated steam is discharged into the atmosphere through the chimney of the quenching tower, the heat of the saturated steam will be wasted. At the same time The process of converting coke quenching saturated steam into liquid water still requires a certain heat exchange process of circulating water

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