Measures to save energy and reduce consumption in the medium-low-low conversion process
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Strictly speaking, our company’s conversion process falls into the “medium-low-low” category; there are two conversion furnaces, with two stages of catalysts for the medium conversion process, and desalinated water and gas are used for heat exchange between these stages； The low-temperature variation is handled by a temperature-adjusted water heater for heat exchange. Gas flow: Gas → Saturated tower → Heat exchanger → Electric furnace → First stage of medium-pressure conversion → Vaporization layer → Second stage of medium-pressure conversion → Heat exchanger → First temperature-adjusting water heater → First stage of low-pressure conversion → Second temperature-adjusting water heater → Second stage of low-pressure conversion → Water heater → Hot water tower → Circulating hot water tower → Soft water preheater (for preheating the soft water used in the boiler) → Indirect cooling tower → Direct cooling tower → Main carbonization tower.Water flow: Hot water tower → Hot water pump → Water heater → Second temperature-adjusting water heater → First temperature-adjusting water heater → Saturated tower ↓ → Post-synthesis boiler → …………↑ In production, due to the fact that the heat exchange area of the temperature-adjusting water heaters does not match the system’s production capacity, both water and gas flow through bypass lines, rendering these devices ineffective! The hot water coming out of the water heater undergoes a cooling process after passing through the temperature-regulating heater, and its low variability also poses a problem. I would like to ask the experts how to save energy and reduce consumption under such operating conditions
The following measures can be taken: 1. Slightly increase the temperature in the middle transformation section, and increase the amount of water used for cooling in the gasification layer of that section； 2. Increase the water circulation volume in the saturated hot water tower to facilitate an increase in the amount of saturated steam.
Thank you! The indicator that changes among us: a hot spot period of 450±10℃ ； Second stage: 420±10℃; low-temperature variation index: 185±5 at the inlet of the first stage℃ ； Two-stage inlet 185±5℃ CO≤1.3%
It’s also okay to raise the temperature by another 10-20 degrees after reaching the medium variation stage
If possible, it is best to conduct energy tests for each section separately, identify the key issues, and address them one by one