Spiral type tube type radiator

Abstract

The invention relates to a spiral tubular radiator for rotary steam heating and drying equipment suitable for various industries such as papermaking, printing and dyeing, wood and food. One end of each steam channel at the steam inlet end spoke is connected to the steam inlet of the rotary joint through a hollow shaft, and the other end is respectively connected to N spiral heat dissipation pipes fixedly connected to the inner wall of the drum body cavity. One end is connected to the spoke at the water return end, and the hollow mandrel of the spoke at the return water end is sleeved with a central return water pipe, and the return water pipe is connected to the water return port of the rotary joint through the hollow spoke shaft at the steam inlet end. Beneficial effects: the radiator with this structure only heats the outer surface or inner surface of the drum, and the steam condensate can be discharged automatically, which can eliminate the tube bundle radiator and completely solve the problem of unclean drainage of steam condensate in the steam drying cylinder with siphon structure in the paper printing and dyeing industry , reduce the pressure rating of the drying cylinder to save steam, improve heating efficiency, save electricity, and use safely.

Description

technical field [0001] The invention belongs to steam heating and drying equipment, in particular to a spiral tubular radiator suitable for various industries such as papermaking, printing and dyeing, wood and food. Background technique [0002] The structure of the current rotary drum steam heating drying drum is as follows: Figure 5-8 As shown, 1. The structure of the drying drum used in the papermaking and printing and dyeing industries adopts the steam inlet and water outlet on the same side, the rotary joint supplies steam, the steam directly enters the drum, and the steam condensed water is connected to the rotary joint outlet through the siphon; 2. For example, the structure of the drying drum in the food processing industry is a drum body and two end covers. There is a steam pipe in the center of the cylinder. After drilling holes in the wall of the steam pipe, it forms a tube bundle with several tubes on its circumference and communicates with the central steam pipe...

AI Technical Summary

Problems solved by technology

The disadvantages of the above three commonly used drying drums are as follows: one is that the distance between the tube bundle heating tubes and the central return pipe is not equal, and the tubes on the periphery of the tube bundle contact the material, resulting in a large amount of steam condensate, while the tubes near the central return pipe Because of its small heat dissipation and high return water pressure, it blocks the drainage of the peripheral tubes, resulting in low overall thermal efficiency of the tube bundle, resulting in waste of steam and low drying efficiency; the second is the rotary drying drum in the paper industry, which uses a siphon structure to eliminate steam condensation There is always a part of the condensed water at the bottom of the cylinder that cannot be discharged, resulting in low heating efficiency; the third is that the rotating drum used in the paper industry is a pressure container, and the material is generally cast. The wall thickness is too large and the weight is too heavy, resulting in rotation The heating speed of the drum is slow, the production efficiency is low, the power consumption is large, and the safety factor is low

Images