Method for carrying out dry quenching and gas making on coked red coke and coking wastewater treatment

Abstract

The invention discloses a method which is capable of realizing red coke heat utilization, coking wastewater treatment and coke quality increment and producing by-products of CO and H2 at the same time. The method is characterized in that a CDQ (Coke Dry Quenching) gas-making furnace is utilized, an appropriate amount of coking phenol-containing wastewater is added in a low-temperature zone of the lower part of the CDQ gas-making furnace, and the temperature of coke in the CDQ gas-making furnace is reduced through the methods of evaporation of coking wastewater and chemical endothermic reaction. According to the method disclosed by the invention, the CO, the H2 and a small quantity of mixed gas of N2, CO2 and H2S are generated through a water-gas reaction, and the mixed gas is divided into two branches through pretreatment; after one branch of the mixed gas is pressurized, separation of the CO, the H2 and the N2 from unreacted CO2 and a small quantity of H2S is realized by utilizing an MDEA (Methyldiethanolamine) desulfurization and decarbonization principle; the CO2 enters the CDQ gas-making furnace to react continuously after the mixed gas of the CO2 and the H2S is directly oxidized and desulfurized, and the CO, the H2 and the small quantity of N2 enter a follow-up production procedure; the other branch of the mixed gas enters the CDQ gas-making furnace to circulate continuously after being pressurized by a draught fan.

Description

technical field [0001] The invention relates to a coking red coke dry quenching gas production method and a coking wastewater treatment method, which relates to a method for treating phenol-containing wastewater by utilizing red coke sensible heat and performing red coke dry quenching gas production, and belongs to the technical field of coal coke chemical industry , especially related to a method that simultaneously realizes red coke heat utilization, coking wastewater treatment, coke upgrading, and by-products of CO and H 2 Methods. Background technique [0002] Coke quenching refers to cooling the refined red hot coke to a temperature that is convenient for transportation and storage. In the traditional wet coke quenching process, the coke quenching vehicle transports the high-temperature coke to the coke quenching tower, and directly uses water to sprinkle it on the coke quenching tower. A method of cooling on high-temperature coke. Generally, several groups of spray he...

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Problems solved by technology

[0006] 3. Due to the rapid cooling of the coke in the wet method, the internal thermal stress is large, resulting in a decrease in the quality of the coke, more broken coke, and a decrease in mechanical strength;

The evaporation of phenol water mainly depends on the heat of the gas generator itself and the waste heat of the kiln. However, although the current phenol water treatment equipment also uses thermal energy for evaporation, there are unreasonable utilization of heat energy, which leads to increased energy consumption of the gas generator or kiln. And directly evaporating phenol water into the atmosphere is actually a transformation of the pollution situation and does not fundamentally control the pollution

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