A kind of heat pump atmospheric pressure single-effect evaporator and using method thereof

Abstract

The invention discloses a heat pump normal-pressure single-effect evaporator and its use method. A water supply pipe is connected at the bottom of one side of the heat pump unit, and the end of the water supply pipe far away from the heat pump unit is connected to a hot water buffer tank. The hot water inlet pipe is connected to the top position of one side of the heat pump unit. Pipe, cold water supply pipe, cold water circulation pump, cold water pipe valve, cold water buffer tank and cooling water inlet pipe can generate hot water and cold water to heat the evaporation raw material and condense the exhaust gas, so that the system is under normal pressure. The low-temperature evaporator does not involve pressurization and vacuuming, which makes the operation of the system more stable. At the same time, because the whole system is in a normal pressure state, people can empty and slag the evaporation tower at any time, and can also clean the nozzles in the tower at any time. Clean or replace.

Description

technical field [0001] The invention relates to the technical field of heat pump evaporators, in particular to a heat pump atmospheric pressure single-effect evaporator and a method for using the same. Background technique [0002] The heat pump evaporator is a new type of evaporator, also known as a thermal compression evaporator. The evaporation method is to compress the secondary steam from the evaporator to a higher pressure by a compressor or a turbine, and then recycle it to make up The heat of evaporation is used to reduce the consumption of steam. The existing heat pump single-effect evaporator uses the principle of vacuuming to reduce the boiling point of water, and the boiling point of water is lowered by 35-55°C, so that the heat pump can be used to heat the water. The temperature is raised to 35-55°C to realize the process of evaporation; [0003] In the actual use process, the existing heat pump single-effect evaporator has the following hidden dangers in the p...

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Problems solved by technology

[0004] The present invention provides a heat pump atmospheric pressure single-effect evaporator and its use method, which can effectively solve the problem that the existing heat pump single-effect evaporator has high requirements on the airtightness of the system in the above-mentioned background technology. If a certain interface in the system Air leakage will destroy the vacuum degree of the system, thereby destroying the evaporation process, and it is difficult to detect air leakage in a certain place during actual use, and can only be checked at one place; When performing maintenance such as checking, replacing or cleaning sensors, the machine must be shut down; when the evaporator is performing slag discharge or material discharge, the slag or material discharge can only be performed by temporarily reducing the vacuum degree of the system or shutting down; due to the high vacuum degree of the system High, so all accessories need to be configured according to the higher vacuum degree, which makes the system cost higher; in the case of high anti-corrosion requirements, only corrosion-resistant metals such as titanium can be used, and the system cost is higher.

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