Waste heat utilization device and waste heat utilization system for intermittent regeneration waste gas

Abstract

The invention relates to the technical field of waste heat utilization, and discloses a waste heat utilization device and a waste heat utilization system for intermittent regeneration waste gas. The waste heat utilization device comprises a regeneration gas heating furnace (001), an MTP reactor (002), a steam pocket (004), a thermoelectric conversion device and a waste gas discharge pipeline; the regeneration gas heating furnace (001) is connected with the MTP reactor (002), and the MTP reactor (002) is connected with the thermoelectric conversion device through the steam pocket (004); gas cooled by the steam pocket (004) exchanges heat with the thermoelectric conversion device and then is discharged through the waste gas discharge pipeline; and a pipeline which is used for directly conveying regenerated gas to the steam pocket (004) and is connected with the MTP reactor (002) in parallel is arranged between the regenerated gas heating furnace (001) and the steam pocket (004). The technical problem that waste heat recycling is difficult due to the fact that reactor catalyst regeneration is an intermittent process is solved.

Description

technical field [0001] The invention relates to the technical field of waste heat utilization, in particular to a waste heat utilization device and a waste heat utilization system for intermittent regeneration of waste gas. Background technique [0002] Since the reactor catalyst regeneration is an intermittent process, it is difficult to recover and utilize waste heat; commonly used fixed bed reactor catalyst regeneration process improvement measures, one is to exchange heat between high-temperature regeneration waste gas and fresh regeneration waste gas to improve fresh regeneration The temperature of the gas reduces the load on the regenerated gas heating furnace. However, the temperature of the regenerated waste gas discharged outside is still higher than 350°C, and due to the layout of the device, there is a large temperature loss during the transportation process, resulting in waste of heat energy; the second is to discharge the high-temperature regenerated waste gas i...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the regeneration waste gas is intermittently produced and difficult to recycle, and set up a low-load heat source supplementary system to maintain the low-load operation of the unit during the short-term absence of the regeneration waste gas and ensure the stable operation of the waste heat utilization device. At the same time, it overcomes the technical problems in the existing technology that the solid impurities carried by the regeneration exhaust gas are deposited on the surface of the heat exchange tube, which affects the heat transfer efficiency, or blocks the flow channel, and causes long-term impact wear on the heat exchange tube.

[0005] At the same time, the waste heat utilization device and waste heat utilization system of the intermittent regeneration waste gas of the present invention solve the problem that the regeneration waste gas is intermittently generated and difficult to recycle, and a low-load heat source supplementary system is set up to maintain the low-load operation of the unit during the temporary absence of the regeneration waste gas , to ensure the smooth operation of the waste heat utilization device

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