Cooling protection system and method applicable to activated coke drying method

Abstract

The invention discloses a cooling protection system and method applicable to an activated coke drying method. The cooling protection system applicable to the activated coke drying method comprises anactivated coke adsorption reaction system, a supply device and a heat exchanger, wherein the activated coke adsorption reaction system is used for purifying an untreated gas; the supply device is usedfor providing a heat exchange gas; the activated coke adsorption reaction system is provided with a temperature sensor for detecting the temperature of an activated coke layer, a gas inlet flue for feeding the untreated gas, and a gas outlet flue for discharging a tail gas formed after the untreated gas is purified; and an oxygen content sensor for detecting the content of oxygen in a pipe is arranged at the gas outlet flue of the activated coke adsorption reaction system. The cooling protection system is safe, effective and reliable, is good in operation and is easy to operate and implement;due to gas cooling protection measures, the speed that heat is carried away by gases is increased, the amount of protection gases is reduced, normal operation of the system can be recovered as soon as possible, the operation cost can be reduced, and the idle rate of the system is reduced; and the system does not need to be stopped to inhibit combustion, a caking phenomenon can be avoided, and theworking efficiency of the system can be ensured.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a cooling protection system and method suitable for active coke drying. Background technique [0002] Activated coke dry purification technology uses activated coke as an adsorbent to absorb and remove SO in flue gas 2 , the active coke after adsorption is regenerated by heating, and the high concentration SO desorbed 2 The mixed gas can directly produce 98% commercial sulfuric acid and realize the resource utilization of sulfur. Utilizing the catalytic function of activated coke, the ammonia added according to the appropriate amount of ammonia nitrogen ratio can reduce the NOx in the flue gas to N 2 And water, the denitrification efficiency can reach more than 80%. In addition, it has a good removal effect on heavy metals and dioxins in flue gas. There is no waste water and waste residue in the removal process. At present, this technology is widely used in i...

AI Technical Summary

Problems solved by technology

In addition, due to factors such as improper control of the inlet flue gas temperature, uneven flue gas flow, poor flow of active coke solid materials, and system oxygen leakage, etc., local hot spots may occur in the active coke layer. In severe cases, it is necessary to purify Active coke discharge in the device

Patent CN20100255775.6 proposes a steam fire extinguishing method. A low-pressure steam pipe is installed near the desulfurization adsorption bed, connected to low-pressure steam, and a control valve is installed on the low-pressure steam pipe. When the coke layer catches fire, the flue gas control valve is immediately closed to cut off The smoke is blown in, and then the steam control valve is opened to introduce low-pressure saturated steam to isolate oxygen and inhibit combustion, but the active coke after steam extinguishing must be discharged from the device, and the coke powder is easy to harden due to the action of steam, resulting in poor material flow

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