Negative pressure production system and method for deeply purifying coke oven gas

Abstract

The invention discloses a negative pressure production system and method for deeply purifying coke oven gas. The negative pressure production system comprises a primary cooler; a top coal gas inlet of the primary cooler is used for feeding raw coke oven gas, a bottom coal gas outlet of the primary cooler is connected with a bottom coal gas inlet of the electrical tar precipitator through a pipeline, and a top coal gas outlet of the electrical tar precipitator is connected with a bottom coal gas inlet of the desulfurizing tower through a pipeline; a top gas outlet of the desulfurization tower is connected with a bottom gas inlet of the ammonia washing tower or the ammonia washing tower group through a pipeline, a top gas outlet of the ammonia washing tower or the ammonia washing tower group is connected with a bottom gas inlet of the benzene washing tower through a pipeline, and a top gas outlet of the benzene washing tower is connected with inlet gas of the deep desulfurization and deamination tower through a pipeline. Outlet gas of the deep desulfurization and deamination tower is connected with inlet gas of an air blower through a pipeline, and outlet gas of the air blower is connected with a gas user pipeline. According to the system, the energy consumption is effectively reduced, the corrosion to gas pipeline equipment is effectively reduced, and remarkable energy-saving and environment-friendly benefits are obtained.

Description

technical field

[0001] The invention belongs to the technical field of coking, in particular to a negative pressure production system and method for deeply purifying coke oven gas. Background technique

[0002] The gas produced in the coking oven coking process contains ammonia, hydrogen sulfide, hydrogen cyanide, benzene hydrocarbons, naphthalene and other harmful chemical components. , block the pipeline and equipment. For this reason, most coking plants use the positive pressure production process to cool and condense coke oven gas to recover chemical products such as ammonia, sulfur, benzene hydrocarbons, etc. Outside the gas for users to use. The blower of the positive pressure coke oven gas treatment system is located after the primary cooler and belongs to the positive pressure operation. The positive pressure process system behind the blower is prone to the phenomenon of running, running and leaking of the production medium, which restricts the environmental protec...

Examples

Embodiment Construction

[0024] figure 1 As shown, the negative pressure production system of this deep purification coke oven gas consists of a primary cooler 1, an electric tar trap 2, a desulfurization tower 3, a first-stage ammonia washing tower 4, a second-stage ammonia washing tower 5, a benzene washing tower 6, a deep Desulfurization and deamination tower 7, blower 8, air flotation degreaser 9, desulfurization liquid sealing tank 10, primary ammonia washing liquid sealing tank 11, secondary ammonia washing liquid sealing tank 12, benzene washing oil sealing tank 13, rich liquid tank 14 , lye tank 15, benzene washing tower bottom rich oil tank 16, rich oil collection tank 17, washing liquid cooler 18, semi-rich liquid cooler 19, upper circulating liquid cooler 20, lower circulating liquid cooler 21, lye metering Pump 22, washing liquid pump 23, semi-rich liquid pump 24, rich liquid pump 25, 1# rich oil pump 26, 2# rich oil pump 27, upper circulating washing pump 28, lower circulating washing pum...

technical field

[0001] The invention belongs to the technical field of coking, in particular to a negative pressure production system and method for deeply purifying coke oven gas. Background technique

[0002] The gas produced in the coking oven coking process contains ammonia, hydrogen sulfide, hydrogen cyanide, benzene hydrocarbons, naphthalene and other harmful chemical components. , block the pipeline and equipment. For this reason, most coking plants use the positive pressure production process to cool and condense coke oven gas to recover chemical products such as ammonia, sulfur, benzene hydrocarbons, etc. Outside the gas for users to use. The blower of the positive pressure coke oven gas treatment system is located after the primary cooler and belongs to the positive pressure operation. The positive pressure process system behind the blower is prone to the phenomenon of running, running and leaking of the production medium, which restricts the environmental protec...

Examples

Embodiment Construction

[0024] figure 1 As shown, the negative pressure production system of this deep purification coke oven gas consists of a primary cooler 1, an electric tar trap 2, a desulfurization tower 3, a first-stage ammonia washing tower 4, a second-stage ammonia washing tower 5, a benzene washing tower 6, a deep Desulfurization and deamination tower 7, blower 8, air flotation degreaser 9, desulfurization liquid sealing tank 10, primary ammonia washing liquid sealing tank 11, secondary ammonia washing liquid sealing tank 12, benzene washing oil sealing tank 13, rich liquid tank 14 , lye tank 15, benzene washing tower bottom rich oil tank 16, rich oil collection tank 17, washing liquid cooler 18, semi-rich liquid cooler 19, upper circulating liquid cooler 20, lower circulating liquid cooler 21, lye metering Pump 22, washing liquid pump 23, semi-rich liquid pump 24, rich liquid pump 25, 1# rich oil pump 26, 2# rich oil pump 27, upper circulating washing pump 28, lower circulating washing pum...

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