Regeneration tower waste heat recovering system and method of activated coke dry method desulfurizer

Abstract

The present invention discloses a regeneration tower waste heat recovering system and method of an activated coke dry method desulfurizer. The system comprises a regeneration tower, a hot air circulating fan, a heat generator, a cooling fan, a sealed nitrogen pipeline, a plate heat exchanger and a rotary heat storage type heat exchanger. The sealed nitrogen pipeline is successively connected with the plate heat exchanger, rotary hat storage type heat exchanger, and a material inlet of the regeneration tower; the sealed nitrogen at the tower top of the regeneration tower is used as a waste heat recovery carrier and respectively conducts a primary preheating and a secondary preheating with outlet air from a cooling segment of the regeneration tower and discharged exhaust gas from a heating segment of the regeneration tower, and the sealed nitrogen is sent into a preheating segment of the regeneration tower to realize the cascade recovery of the waste heat; and the discharged exhaust gas is sent to a total pipe of an exhaust gas outlet of an absorption tower and discharged from a chimney. Advantages are as follows: the system realizes the waste heat recovery, improves the tower entering temperature of the sealed nitrogen, heat utilization efficiency of the regeneration tower, and the coke temperature of the active coke entering the preheating segment, reduces the fuel consumption of the heat generator, improves the tower exiting temperature of resolution gas and avoids the corrosion problem of the pipeline of the regeneration gas.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization, and in particular relates to a waste heat recovery system and method for a regeneration tower of an active coke dry desulfurization device. Background technique [0002] Activated coke dry desulfurization is the use of activated coke and SO in the flue gas of coal-fired boilers 2 Under the action, chemical reaction occurs with water and oxygen in the flue gas to generate sulfuric acid. Adsorption saturated SO 2 The final activated coke flows from the adsorption tower into the regeneration tower, flows through the preheating section, the analysis section, and the cooling section respectively to restore its activity, and finally is sent back to the adsorption tower for cyclic adsorption through lifting equipment such as conveyors. [0003] to attach image 3 As an example, in the prior art, the heat source of the analysis section of the regeneration tower generally comes from the...

AI Technical Summary

Problems solved by technology

[0011] In order to overcome the defects of the prior art, the object of the present invention is to provide a waste heat recovery system and collection method of the regeneration tower of the active coke dry desulfurization device, through the cascade recovery of the waste heat of the regeneration tower, the temperature of the sealed nitrogen gas entering the tower is improved, and the solution is solved. The problem of low heat utilization rate of regeneration tower in the original system

Images