A reactor heating system for sewage anaerobic treatment based on direct-fired absorption heat pump

Abstract

The invention discloses a sewage anaerobic treatment reactor heating system based on a direct-fired type absorption heat pump. The system comprises a UASB anaerobic reactor system, an absorption heat pump part and a fuel gas boiler part, wherein the UASB reactor part is used for decomposing sludge through anaerobic bacteria of anaerobic sludge and generating biogas; the biogas is introduced into the fuel gas boiler part and is burnt to generate hot steam; the hot steam is transmitted into the absorption type heat pump part; after the hot steam is circulated in the absorption type heat pump part, generated hot water is introduced into the UASB reactor part, so that the temperature in the reactor is kept within an optical reaction temperature range, and the anaerobic bacteria in the reactor are in a relatively high activity state. The sewage anaerobic treatment reactor heating system is novel in design, can realize energy cyclic utilization, and increases a sewage purifying rate.

Description

technical field [0001] The invention relates to the field of equipment used when anaerobic digestion process is used to treat sewage, in particular to a sewage anaerobic treatment reactor heating system based on a direct-fired absorption heat pump. Background technique [0002] The upflow anaerobic sludge bed (UASB reactor) is a high-efficiency sewage treatment device developed in the 1970s. The flow rate of sewage in the UASB reactor is slow, but the direction of water flow is consistent with the rising direction of gas production, which can not only reduce clogging, but also strengthen the stirring and mixing effect on the sludge bed, which is beneficial to the mixing contact between microorganisms and sewage and particle pollution. The formation of mud, so the sewage treatment efficiency of UASB reactor is higher. However, due to the low temperature in winter, and the optimal growth temperature of most anaerobic bacteria in sludge is around 33°C, if the reactor is not he...

AI Technical Summary

Problems solved by technology

However, due to the low temperature in winter, and the optimal growth temperature of most anaerobic bacteria in sludge is around 33°C, if the reactor is not heated, the activity of anaerobic bacteria in sludge will decrease, resulting in The processing capacity and processing efficiency of the reactor are greatly reduced, and this problem is particularly prominent in northern my country

Most of the methods currently used are to use other energy sources to convert heat energy to heat the reactor, so that the biogas generated by the reactor is not used, which causes waste and increases the complexity of the system; Combustion in the boiler produces steam, but the utilization efficiency of the boiler is low, which will also cause waste of energy

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