Pressurized hot water dynamic circulating heating system

Abstract

The invention relates to a pressurized hot water heating system used in a Chinese medicament preparation process, in particular to a pressurized hot water dynamic circulating heating system. The technical scheme provided by the invention is that: the pressurized hot water dynamic circulating heating system comprises a purified water input end, a diaphragm expansion tank, a heat input end, a plate-type heat exchanger communicated with the diaphragm expansion tank and the heat input end respectively, a hot water output end, a drainage system, heat adjustment systems and a refluxing system, wherein the drainage system is communicated with the plate-type heat exchanger; the refluxing system is positioned between the diaphragm expansion tank and the purified water output end; and the heat adjustment systems are distributed among the heat input end, the diaphragm expansion tank and the plate-type heat exchanger, between the plate-type heat exchanger and the hot water output end and between the hot water output end and the diaphragm expansion tank. Through the technical scheme, the pressurized hot water dynamic circulating heating system is provided and has the characteristics of steam heat input adjustability and controllability, steam heat full-utilization, energy source saving, and fast, uniform, stable and accurate heat supply.

Description

technical field [0001] The invention relates to a pressurized hot water heating system used in the traditional Chinese medicine pharmaceutical process, in particular to a pressurized hot water dynamic circulation heating system. Background technique [0002] Heating is usually divided into non-contact heating and contact heating, in which non-contact heating mainly refers to high-frequency heating, and contact heating refers to the heating medium that transfers heat energy to the hot pressing plate that is in direct contact with the slab. The plate transfers thermal energy to the slab, thereby heating the slab. According to the different properties of heat medium, contact heating is divided into electric heating and fluid heating. Fluid heating mainly includes saturated steam heating, pressurized hot water heating and heat transfer oil heating. At present, the heating system commonly used in domestic industrial production is mainly saturated steam heating, and the temperatu...

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Problems solved by technology

[0003] (1) Saturated steam has a large flow rate and large fluctuation during the heating process, which has a large impact on the heating plate and produces a large vector deformation, resulting in uneven heat transfer and local overheating, and the steam after heat exchange There will be more condensed water in the lower part and less in the upper part, which will also lead to uneven heat transfer;

[0004] (2) Usually, the control accuracy of steam heating is about ±5.0°C, which cannot meet the production process with high precision requirements;

[0005] (3) Since the increase of steam temperature is proportional to the pressure, steam heating has higher requirements on the supporting boiler equipment and piping system, and the higher the temperature, the higher the cost;

[0006] (4) The heat provided by the steam boiler before heating the water to boiling and the heat left in the water after the steam condenses cannot be used. After the steam is heat-exchanged, part of it becomes condensed water. Generally, these steam-water mixtures are If it is directly discharged, the latent heat of vaporization of the steam cannot be fully utilized, and at the same time, the boiler blowdown also loses energy, so when heating with steam, the heat energy is wasted greatly;

[0007] (5) The heat loss of steam is large during the transportation process, and the secondary recovery of steam is very difficult, the situation of running, popping, dripping and leaking of steam is serious, and the comprehensive utilization rate of heat energy is low

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