Pulp waste steam heat energy recycling and comprehensive utilization treatment method and device

Abstract

The invention discloses a pulp waste steam heat energy recycling and comprehensive utilization treatment method and device. The method comprises the steps that (1), the heat energy in pulp waste steamis absorbed and stored through an absorption and energy storage unit, and the recycling of the heat energy of the waste steam is achieved; (2), hot water generated after the absorption and energy storage unit absorbs the heat energy is inputted into a black liquor evaporation system provided with an evaporation unit and a steam balance unit, steam of each grade for hot water flash evaporation isstably conveyed and distributed to the black liquor evaporation system through the steam balance unit, and the cooled hot water is returned to the absorption and energy storage unit; and (3), the waste gas generated by the absorption and energy storage unit and the black liquor evaporation system is condensed in a condenser, the condensed waste gas is conveyed to a deodorization unit through a vacuum pump, and the deodorized waste gas is discharged into the atmosphere. According to the pulp waste steam heat energy recycling and comprehensive utilization treatment method and device, comprehensive utilization of waste steam heat energy in the pulp industry can be achieved, meanwhile, waste gas is discharged up to the standard, environmental friendliness is achieved, and the production cost of enterprises can be effectively saved.

Description

technical field [0001] The invention belongs to the technical field of pulp production, and in particular relates to a treatment method and device for comprehensive utilization of pulp waste steam heat energy recovery and utilization. Background technique [0002] Because the steaming ball is used as the cooking equipment for pulp production, the advantages are that the raw material and the liquid are mixed evenly, the quality of the pulp is relatively uniform, the liquid ratio is small, the concentration of the liquid is high, the cooking time can be shortened, and the equipment structure is simple and the volume is small. It is easy to install and maintain, etc., but due to the characteristics of large heat energy, fast discharge speed, frequent discharge and rich entrainment due to the large and small steam release of the steaming ball, a large amount of cooking waste steam will be generated. It contains small fibers, methyl mercaptan, hydrogen sulfide and other impuritie...

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Problems solved by technology

[0002] Because the steaming ball is used as the cooking equipment for pulp production, the advantages are that the raw material and the liquid are mixed evenly, the quality of the pulp is relatively uniform, the liquid ratio is small, the concentration of the liquid is high, the cooking time can be shortened, and the equipment structure is simple and the volume is small. It is easy to install and maintain, etc., but due to the characteristics of large heat energy, fast discharge speed, frequent discharge and rich entrainment due to the large and small steam release of the steaming ball, a large amount of cooking waste steam will be generated. It contains small fibers, methyl mercaptan, hydrogen sulfide and other impurities. If it is directly discharged, it will not only waste a lot of energy, but also seriously pollute the environment. The recovery and reuse of cooking waste steam must be solved as soon as possible.

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