Middle shaft assembly of chemical making tank for harmless treatment of livestock and poultry died of illness and slaughter byproducts

Abstract

The invention relates to a middle shaft assembly of a chemical making tank for harmless treatment of livestock and poultry died of illness and slaughter byproducts. The middle shaft assembly is characterized by comprising a main shaft and shaft heads mounted at end sockets at the two ends of a tank body through sealing assemblies; a plurality of heat exchange drums are axially arranged on the periphery of the main shaft; stirring wings are mounted on the heat exchange drums; the stirring wings are correspondingly mounted on the heat exchange drums in a spiral surrounding manner along the mainshaft; the main shaft is of a hollow tubular structure a hollow tubular cavity is used for circulation of heat conduction fluid, and a preset number of through holes are formed in the axial directionof the main shaft at intervals. The multiple heat exchange drums are fixedly arranged on the outer wall of the main shaft in the axial direction, and the installation positions of the heat exchange drums cover the through holes so that the main shaft pipe cavity and the drum inner cavity can communicate with each other to form a heat exchange cavity. According to the invention, a multi-groove sealing mode, an efficient heat exchange mode and a scientific stirring fin arrangement mode are combined, so that a center shaft operates more stably and efficiently.

Description

technical field [0001] The invention relates to a chemical tank structure, in particular to a central shaft assembly for harmless treatment of sick and dead livestock and poultry and slaughter by-products. Background technique [0002] In the harmless treatment and processing of dead livestock and poultry and slaughtering waste in my country, high temperature and high pressure dry and wet methods are usually used, that is, chemical tanks are used for treatment, and the central shaft inside the chemical tank plays the role of stirring and heat exchange. Therefore, the structural performance of the central axis is very important for chemical production. [0003] However, the current harmless treatment of dead livestock and poultry and slaughtering by-products has the following major problems in the axis of chemical canning: [0004] 1. The center shaft structure of existing chemical tanks is mainly to directly weld the stirring fins on the central shaft (metal seamless steel...

AI Technical Summary

Problems solved by technology

[0004] 1. The center shaft structure of existing chemical tanks is mainly to directly weld the stirring fins on the central shaft (metal seamless steel pipe) or fix the stirring fins on the shaft with hoops. In order to increase the heating efficiency in the tank, the current practice It is to pass steam into the cavity of the central shaft, and heat the material in the tank through the outer wall of the central shaft, but after all, the diameter of the central shaft is limited, its heat exchange area is relatively small, and the heat utilization rate is low, so the time for materialization and drying is reduced. Longer, becoming a common problem in the industry that needs to be solved

[0005] 2. The center shaft of existing chemical tanks usually adopts a through-shaft structure with a long shaft length

If there is air leakage at the shaft end, continue to compress or add or replace the packing manually, which is cumbersome and inefficient.

In addition, because the degree of compression of the packing gland is difficult to grasp, the degree of compression is insufficient to achieve the sealing effect, and the degree of compression is too large, which will easily increase the load on the motor and reducer, and also wear the main shaft

In particular, the packing is a vulnerable part, and the frequency of wear and replacement is relatively high

It is also troublesome to replace, and it is not conducive to the realization of automation functions

[0006] 3. The central axis of the existing chemical tank is equipped with a plurality of stirring fins, which are divided into 3-4 rows along the radial direction of the central axis, and each row has 4-8 stirring fins, because each row of stirring fins has the same shape. The axis is arranged. During the material stirring process, the clumped (fibrous ropes are entangled into a ball) material is completely turned over by the stirring wings. During the turning and rising period, the stressed stirring wings will cause the motor to generate a large current due to the sudden overload load; During the flipping down period, the agitator wing suddenly unloads the force and causes the motor current to drop instantaneously. This sudden high and low current change is not conducive to the stable operation of the motor and reducer, and will easily affect the service life of the motor and reducer.

Uneven stirring and uneven heating of materials will affect the normal production time of materials and reduce production efficiency

The finished material can only be pushed and discharged by the scraper on the outer periphery of the stirring wing, and the discharge time is too long and the efficiency is low

[0007] 4. Because the tank liner of the existing chemical tanks is generally made of carbon steel, first of all, after the coiling process, the inner diameter of the finished product has a certain dimensional deviation due to the influence of the processing technology. Difficulty meeting ideal size requirements

This also caused unnecessary troubles to normal production and greatly affected the efficiency of work.

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