Adsorptive regeneration device with solid-liquid phase change matters and adsorptive regeneration process

Abstract

The invention discloses an adsorptive regeneration device with solid-liquid phase change matters and an adsorptive regeneration process. The device comprises an oil gas inlet, a first adsorption tank, a first heat exchange tube, a vacuum pump, a first oil inlet valve, a first vacuum valve, a first oil outlet valve and a clean gas discharge port, wherein the first heat exchange tube is arranged in the first adsorption tank and the inner portion of the first heat exchange tube is of a hollow structure and is filled with solid-liquid phase change energy storage matters; the oil gas inlet is successively connected to the first oil gas inlet valve, the first adsorption tank, the first oil gas outlet valve and a clean gas discharge port; and one end of the first vacuum valve is connected between the first oil gas inlet valve and the first adsorption tank while the other end is connected to the vacuum pump. The volume of a coil required is reduced in the adsorptive regeneration device with solid-liquid phase change matters, so that the field equipment is less, and the input cost is saved; and mechanical equipment such as a circulating pump and a switch valve is not used, so that the device is more stable to operate.

Description

technical field [0001] The invention relates to the technical field of oil and gas adsorption regeneration, in particular to an adsorption regeneration device with solid-liquid phase change material and an adsorption regeneration process. Background technique [0002] VOC gases such as oil and gas are generally discharged up to the standard through adsorption and other processes. Activated carbon with a large specific surface area is often used for adsorption. Since the adsorption process is an exothermic process, after activated carbon absorbs oil and gas, its ignition point may drop to about 100 ° C. Therefore, GB 50759 -2012 and other national standards require that the adsorption temperature be controlled within 65°C. If the temperature of the adsorption process is not well controlled, it will bring huge potential safety hazards. [0003] For the problem of adsorption temperature control, before the oil and gas enter the activated carbon adsorbent, the oil and gas are co...

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Problems solved by technology

This will undoubtedly increase investment and increase system complexity

[0005] After the activated carbon absorbs oil and gas, the vacuum regeneration process is generally used to regenerate the activated carbon. During regeneration, the temperature of the adsorbent is lowered due to the volatilization of the adsorbed oil and gas, and the lowering of the temperature makes it difficult to desorb the oil and gas.

What's more serious is that for some high melting point substances such as benzene, due to evaporation and heat absorption during desorption, the temperature may drop to the freezing point of benzene and other high melting point substances, and the adsorbate crystallizes in the micropores of the activated carbon, causing the destruction of the micropores of the activated carbon. Make activated carbon "poisoned" invalid, therefore, when desorbing, it is often necessary to introduce heated air or nitrogen to avoid the crystallization of the adsorbate, so that the regeneration can be completed smoothly. , which undoubtedly increases energy consumption and operating costs

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