No-steam gas purification device using debenzene heat lean oil as heat source and its application method

Abstract

The invention relates to the field of gas purification, in particular to a non-steam gas purification device using debenzene-removed lean oil as a heat source and an application method thereof. A steam-free gas purification device using debenzene-depleted heat as a heat source, comprising a benzene-removing tower (11) and a benzene-washing tower (12), characterized in that it also includes a heat exchanger (2), a heater (3) And cooler (4), debenzene tower (11), heat exchanger (2), heater (3), cooler (4) and benzene washing tower (12) are connected successively by oil pipe. A method for using a non-steam gas purification device using debenzene-removed lean oil as a heat source is characterized in that it is implemented in sequence as follows: first-stage heat exchange, second-stage heat exchange and third-stage heat exchange. The invention has high thermal energy utilization rate, high temperature control stability, land saving and good environmental protection.

Description

technical field [0001] The invention relates to the field of gas purification, in particular to a non-steam gas purification device using debenzene-removed lean oil as a heat source and an application method thereof. Background technique [0002] At present, the ammonia distillation process in most coking plants adopts the steam method or the tube furnace process, and the ammonium sulfate gas preheater in the process uses steam to heat the gas. This method has the following defects: 1. The steam is heated by steam Condensation produces waste water, which increases waste water discharge and treatment costs, and the environmental protection effect is poor; 2. The temperature difference between hot lean oil and gas is not fully utilized, and the consumption of circulating water and low-temperature water is large, and the energy-saving effect is poor; 3. Steam heating is Using the latent heat of phase change, the temperature difference relative to the heated medium should not be...

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Problems solved by technology

[0002] At present, the ammonia distillation process in most coking plants adopts the steam method or the tube furnace process, and the ammonium sulfate gas preheater in the process uses steam to heat the gas. This method has the following defects: 1. The steam is heated by steam Condensation produces waste water, which increases waste water discharge and treatment costs, and the environmental protection effect is poor; 2. The temperature difference between hot lean oil and gas is not fully utilized, and the consumption of circulating water and low-temperature water is large, and the energy-saving effect is poor; 3. Steam heating is Using the latent heat of phase change, the temperature difference relative to the heated medium should not be too high, and the temperature control is limited, so steam heating is used, and the temperature control stability is poor; 4. The ammonia distillation is heated by the tube furnace method, the system is complex and occupies an area Large area, high investment, easy to corrode, poor safety

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