Low energy consumption general multi-mode smart adsorption drying method for preparing compressed air

Abstract

The invention relates to a preparation technology of compressed air and aims to provide a low energy consumption general multi-mode smart adsorption drying method for preparing compressed air. An adsorption drying system is targeted at parallel operation of a double adsorption barrel and a multi-adsorption barrel; air flow organization of hot air flows are performed from an upper part of a regeneration adsorption barrel downwards to realize regeneration of an adsorption agent; the method includes a heating and regenerating stage for waste heat of compressed air, a voltage discharging stage, fanning, deepening and heating stage and a circulating and cooling stage. The method disclosed by the invention has the advantages of (1) low energy consumption, fully utilizing compressed waste heat and environmental cooling capability; (2) multi-module design, realizing multi-layered dew point control; (3) multi-module regeneration, ensuring long-time work of a drying agent; (4) self-adjusting capability; and (5) digitalized efficient analysis. According to the method provided by the invention, optimal control of the drying agent monitored in real time based on the wet height of adsorption barrels is utilized, long-time and smooth operation of the whole adsorption technology is ensured, long-time and stable work of the drying agent is ensured, and the replacement cost is greatly reduced.

Description

technical field [0001] The invention relates to compressed air preparation technology, in particular to a general multi-mode intelligent adsorption drying method with low energy consumption for compressed air preparation. Background technique [0002] Compressed air, as the main public engineering component of many process industries, provides corresponding gas environment parameters to the main process to ensure smooth production, and it is also a major energy consumer in the process industry. In addition to the requirements for compressed air flow and pressure, users also have requirements for compressed air quality, among which the moisture content of compressed air is a very important indicator. It is reflected in the requirements for compressed air dew point (atmospheric pressure dew point or corresponding pressure dew point) under different inflow conditions (environmental working conditions), production load and process requirements. [0003] In fact, the main proces...

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Problems solved by technology

Among them, the composite drying is oriented to the fuel injection machine and high dew point requirements. The existing problems are very clear. First, the waste heat of compression cannot be considered at all, and a freezing environment needs to be established; surge; the third limitation is that the micro-thermal process is often used in conjunction with adsorption drying, and the basic regeneration gas consumption is more than 5% of the design capacity

The main problem of no-heat and micro-heat is that the regeneration gas consumption is large, which is not suitable for the needs of sustainable development; although the micro-gas consumption has improved in terms of gas consumption and the use of compression waste heat, there are still problems in dew point and pressure drift. Obvious flaws; zero gas consumption waste heat is a continuous drying process that is completely regenerated based on compression waste heat, and realizes regeneration without gas consumption in terms of gas consumption

However, judging from a large number of current application practices, the biggest problem in the waste heat drying process with zero gas consumption is that the waste heat is seriously affected by the exhaust temperature of the main engine and the temperature of the cooling water, which makes the accuracy of the dew point unsuitable for various processes; in addition, due to the overall During the treatment process, the air is circulated internally, resulting in a high humidity load of the adsorption cylinder

The problem in the blast adsorption drying process is that the waste heat of compression and conventional cooling are difficult to be fully utilized

Vacuum adsorption drying is quite advanced in theory, but in the actual process, the maintenance of vacuum and the state of the adsorbent are the difficulties.

[0006] In summary, from the analysis of various adsorption drying processes currently implemented, there is a lack of a low-energy, high-precision post-treatment process system that makes full use of waste heat and has wide versatility.

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