Device and method for realizing continuous pyrohydrolysis treatment of organic material

Abstract

The invention discloses a device and a method for realizing continuous pyrohydrolysis treatment of an organic material. According to the method, the organic material is preheated to below 100 DEG C by utilizing flash-off steam, the temperature and the pressure in a booster jar are increased with the flash-off steam, reactants after boosting enter a two-stage reaction unit with tubular mixing heat exchange and pyrohydrolysis reaction, heat fully exchanges with high-temperature and high-pressure steam to perform pyrohydrolysis reaction, one-stage flash-off and two-stage flash-off are continuously performed on the material after reaction, the produced flash-off steam enters the booster jar and a preheating tank respectively as preheating mediums, and the reactants after the flash-off are thrown into a digestion tank after cooling mixing for fermentation to produce marsh gas or directly drying compost. The device comprises the preheating tank, a two-stage continuous pyrohydrolysis reactor consisting of a tubular mixing heat exchanger and a continuous reaction tank, and a flash-off cooling part. The device and the method fully realize the cascade efficient utilization of the system waste heat; compared with the traditional sequencing batch reaction technology, the equipment and the running control of the equipment are simplified, and the continuous pyrohydrolysis reaction of the organic material is realized.

Description

technical field [0001] The invention relates to organic matter thermal hydrolysis technology, in particular to an organic matter continuous thermal hydrolysis treatment device and method. Background technique [0002] With the development of my country's national economy, the generation of organic solid waste such as sludge and kitchen waste has increased dramatically. At present, organic matter such as surplus sludge mainly adopts the treatment process of "preheating-anaerobic digestion-dehydration and drying". 30 days) and other shortcomings. [0003] The thermal hydrolysis digestion treatment process is a treatment technology for sludge reduction, resource utilization, stabilization and safety. The thermal hydrolysis reactor is the core and key equipment of the sludge thermal hydrolysis-anaerobic digestion system, which not only determines the effect of the biogas output, but also determines the energy consumption of the entire sludge treatment plant. Existing thermal ...

AI Technical Summary

Problems solved by technology

Existing thermal hydrolysis reaction devices and processes can be generally classified into two types: one is to adopt a batch-sequencing method with active power consumption, such as a high-pressure reactor with agitation method, which can ensure a larger unit time. processing capacity, but this method consumes a lot of power, the sequential batch method is not adaptable enough to changes in processing capacity, and the control system is cumbersome; the other is a tubular continuous thermal hydrolysis reactor

Since the preheating, mixed heating, heat preservation and pressure holding, and flash cooling are carried out in the same tube, this continuous tube treatment method can realize continuity, but the disadvantage is that the size of the reaction tube increases when the processing capacity increases, and the heat transfer effect is affected. Second, there is no flash evaporation process, so the energy utilization is unreasonable, and the third is that the initial raw material concentration is relatively high

[0004] In summary, the existing thermal hydrolysis fermentation treatment technology for organic matter such as sludge has problems such as low heat exchange efficiency per unit time or unit energy consumption, long thermal hydrolysis cycle, and relatively large energy consumption.

Images