Steam condensation method

Abstract

The invention discloses a steam condensation method which comprises the following steps: steam enters from one end of a heat exchange pipe in a first-stage heat exchange area, sequentially passes through the first-stage heat exchange area for primary cooling, the second-stage heat exchange area for secondary cooling and the third-stage heat exchange area for third cooling, and then is discharged from one end of a heat exchange pipe in the third-stage heat exchange area; the spraying pipeline is used for spraying and cooling substances in the heat exchange pipe in the second-stage heat exchange area; the air inlet area is used for feeding air so as to cool substances in the heat exchange tubes in the first-stage heat exchange area and the second-stage heat exchange area; the first cooling is to reduce the temperature of substances in the heat exchange tube by taking air as a medium, the second cooling is to reduce the temperature of the substances in the heat exchange tube by taking liquid and air as media, and the third cooling is to reduce the temperature of the substances in the heat exchange tube by taking liquid as a medium. According to the steam condensation method, intermediate conversion loss is reduced, and the heat exchange efficiency is higher; and the air exhaust temperature of heat exchange is increased by utilizing self heat, so that the white smoke removal effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a method for desorption steam condensation and heat dissipation. Background technique [0002] Existing waste gas recovery equipment such as toluene, after the activated carbon is desorbed by steam, the desorption liquid is connected to the traditional shell and tube condenser, and the temperature is lowered through the condenser. The refrigerant is cooling circulating water, which needs to be specially equipped with a cooling tower, using circulating water as the refrigerant Cool the high temperature desorption steam. Cool the desorbed vapor from gaseous state to liquid at about 40°C. [0003] Problems in the existing technology: 1. Below zero temperature in winter, the water freezes and cannot be used; 2. The cooling circulation water pipe freezes and cracks often occurs below zero temperature in winter; 3. The filling of the cooling tower is not resist...

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Problems solved by technology

[0003] Problems in the existing technology: 1. Below zero temperature in winter, the water freezes and cannot be used; 2. The cooling circulation water pipe freezes and cracks often occurs below zero temperature in winter; 3. The filling of the cooling tower is not resistant to high temperature and will melt Phenomenon; 4. Sludge fouling will occur in the cooling water pipe when it is used for a long time; 5. Calcium carbonate scaling will occur in the condenser after using it for a long time, which will seriously affect the heat exchange efficiency; 6. The cooling tower will discharge hot water and affect the Environmental perception; 7. The cooling tower is prone to lack of water, which will cause the water pump to run idly, etc.

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