Tank calciner waste heat power generation system based on mother tube

Abstract

A tank-type calciner waste heat power generation system based on main pipes comprises a steam turbine, a generator, the high-pressure steam main pipe, the low-pressure steam main pipe and at least oneset of waste heat power generation subsystems. Any waste heat power generation subsystem comprises a tank-type calciner, a calcined coke cooling device and a waste heat boiler. High-temperature fluegas from the tank-type calciner exchanges heat for cooling in the waste heat boiler. The waste heat boiler of any waste heat power generation subsystem comprises a second superheater, an evaporator, afirst superheater and an economizer. A steam outlet of each second superheater is communicated with a main steam outlet of the steam turbine through the high-pressure steam main pipe. A steam outletof each first superheater is communicated with a steam supplement port of the steam turbine through the low-pressure steam main pipe. The steam turbine is connected with the generator. The tank-type calciner waste heat power generation system has compact layout and low investment cost. The calcined coke cooling device is designed into a component-level cooling mode, so that the temperature of thecalcined coke is prevented from being too high; and the high-temperature waste heat of the calcined coke is recycled through the calcined coke cooling device and is used for driving the steam turbineto generate electricity, and the resource utilization rate of the calcination process is increased.

Description

Technical field [0001] The invention relates to the technical field of waste heat utilization in the carbon industry, and specifically to a tank-type calciner waste heat power generation system based on a mother tube. Background technique [0002] Carbon material is one of the main raw materials in the electrolytic aluminum production process. The production of carbon material products is a key link restricting the development of the aluminum industry. my country's aluminum industry has entered a fast track in recent years, and carbon for aluminum has developed accordingly. The production capacity of carbon material products has increased from one million tons a few years ago to tens of millions of tons now, and it is still developing at a certain growth rate. [0003] The tank calciner is one of the main equipment in the carbon production process. It can calcine petroleum coke with different volatile contents. It has stable calcining material quality, low carbon burning los...

AI Technical Summary

Problems solved by technology

However, due to the obvious characteristics of the flue gas from the calciner, that is, the flue gas temperature is high, but the flue gas volume is small, which makes the carbon plant not very active in recovering the waste heat of the high-temperature flue gas from the calciner, and many carbon plants even use blast The way of cooling is to mix low-temperature air into high-temperature flue gas through a high-power blower, perform forced cooling and then discharge it into the atmosphere, resulting in waste of valuable waste heat resources of the flue gas, and the new power consumption of the high-power blower also brings carbon increase in production costs

[0005] In addition, the high-temperature calcined coke (temperature up to 1000°C) at the outlet of the pot calciner also contains a large amount of sensible heat. The current method is to install a cooling water jacket under the calciner, and cool the high temperature by circulating cooling water. The calcined coke is cooled, and the cooling water in the cooling water jacket exchanges heat indirectly with the calcined coke of the calciner. The cooling water after absorbing heat is sent to the cooling tower to dissipate heat, and then returns to the water jacket to be used as a cooling water jacket to feed water, so cycle, obviously, this way leads to a lot of waste of heat energy

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