Heating and hydrolysis equipment for food waste

Abstract

The invention relates to heating and hydrolysis equipment for kitchen waste. The heating and hydrolysis equipment is characterized in that a reaction bin comprises a main body and end covers connected to the two ends of the main body; a feeding port is arranged in the front of the main body; a discharging port is arranged above the rear of the main body; a slurry outlet pipe is connected to the discharging port; a stirring driving mechanism comprises a stirring motor and a transmission spindle; the two ends of the transmission spindle penetrate through the end covers and sealing seats, and are supported on respective bearing seats through bearings; the output end of the stirring motor is connected with the transmission spindle; a stirring actuating mechanism comprises helical blades and stirring blades; the helical blades and the stirring blades are connected onto the transmission spindle in a spaced manner; the helical blades are separately arranged at the feeding port, the middle part and the discharging port of the main body; a steam heating mechanism comprises a steam heating pipe as well as a plurality of steam distributing pipes and steam nozzles; and the steam nozzles are connected with the steam heating pipe through the steam distributing pipes, and arranged on the main body in the length direction of the main body in a spaced manner. The heating and hydrolysis equipment has the advantages that the structure is reasonable and compact; the maintenance is convenient; the possibility of scale formation inside the main body is low; the energy consumption is low; and organic matter and liquid grease in solid-phase or coarse slurry of the kitchen waste can be sufficiently degraded.

Description

technical field [0001] The invention relates to a device for heating and hydrolyzing kitchen waste, which belongs to the technical field of waste treatment. Background technique [0002] Food waste refers to the food residues of residents in food processing and catering consumption. It has the characteristics of high water, oil, organic matter and salt content. [0003] At present, domestic and foreign food waste treatment technologies mainly include landfill, incineration, composting, physical crushing, feed and anaerobic digestion treatment technologies. In addition to the high content of starch, animal fat, dietary fiber and other organic substances in food waste, it is also rich in nitrogen, phosphorus, potassium, calcium and other elements, which has the characteristics of comprehensive nutrition and extremely high utilization value. Anaerobic digestion treatment technology has the advantages of low energy consumption, recovery of clean energy such as biogas, and reduc...

AI Technical Summary

Problems solved by technology

At present, some hydrolysis processes only perform grease operation on the drained water received under the food waste feeding hopper. The disadvantage of this treatment is that, on the one hand, quite a lot of grease is mixed with the solid phase, and only a small part of the drained water, especially for animals Fat

On the other hand, the inability to efficiently recycle the oil in the kitchen waste will not only cause waste of resources, but also affect the stable operation of subsequent equipment, especially the subsequent solid-liquid separation equipment and anaerobic digestion reaction.

[0005] The existing more advanced tank-type heating equipment can withstand high pressure, so that the slurry can be heated to a higher temperature, which can improve the hydrolysis efficiency, but it is easy to cause the solid phase to adhere to the tank body to harden and scale, which requires cleaning and maintenance. cause difficulty

Secondly, tank-type heating is often processed in batches, which requires additional buffer devices and takes up a lot of space. However, the composition of Chinese-style food waste is relatively complex, containing a large amount of abrasive materials such as glass, shells, and sand. The phase solubility increases, the fluidity becomes better, and the abrasive material is easy to deposit at the bottom of the tank, resulting in a decrease in volume and lowering its working efficiency. If it is pumped, it will cause serious wear and tear on the pump

[0006] Furthermore, because the water content of the kitchen slurry is basically about 80-90%, and it is in the shape of a dense slurry, there are still two difficult shortcomings in the heating of the kitchen slurry by tank heating. 1. Using a jacket If the kitchen slurry is heated by heat exchange, the heating efficiency will be too low, the energy consumption will be high, and it will cause serious fouling on the tank wall; Due to the high water content and compact characteristics of the material and the weak stirring effect of the tank heating, it is easy for the steam to pass through the slurry layer and cause a short circuit, resulting in frequent virtual pressure in the tank, resulting in difficult heating control and large heat loss. And other issues

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