Adjustable steam jet heat pump

Abstract

The invention relates to an adjustable steam jet heat pump which is composed of a high-pressure driving steam sucking-in chamber, a steam control membrane head, a valve straight rod, a nozzle, a low-pressure steam chamber, a diffusion pipeline, a pressure sensor and an A / D converter. The steam control membrane head is mounted at the upper end of the high-pressure driving steam sucking-in chamber, and the valve straight rod is connected with the steam control membrane head and coaxial with the nozzle; the pressure sensor is mounted on a steam outlet pipeline, measured pressure change signals are transmitted to the steam control membrane head through the A / D converter, the valve straight rod is driven to move in the axial direction, the effective actual internal area of the nozzle is adjusted, and stable mixed steam pressure is reached. By means of the adjustable steam jet heat pump, heat pump outlet steam with stable pressure can be obtained, the adjustability is good, operation is stable, the structure is suitable, and the adjustable steam jet heat pump can be widely applied to industrial operation such as heat pump evaporation, high-temperature condensate water steam recovery, heat pump drying, heat pump rectification, starch jetting and liquidation and superheated steam humidification.

Description

technical field [0001] The invention relates to an adjustable steam jet heat pump, in particular to a steam jet heat pump which automatically controls the effective flow cross-sectional area of ​​the outlet of a driven steam nozzle, and belongs to the technical field of heat pumps. Background technique [0002] The steam injection heat pump is a device that boosts the pressure of low pressure steam through high pressure steam. It mainly uses high pressure steam jet to cause heat exchange between low pressure steam and high pressure steam, so as to achieve the purpose of boosting and recycling low pressure steam. Its functions also include the recovery and reuse of low-pressure steam, flash steam and equipment exhaust steam. At present, the steam injection heat pumps used in domestic production have specific requirements for the mixed steam pressure at the heat pump outlet. When the high-pressure steam, low-pressure steam or outlet back pressure fluctuate, the steam pressure ...

AI Technical Summary

Problems solved by technology

At present, the steam injection heat pumps used in domestic production have specific requirements for the mixed steam pressure at the heat pump outlet. When the high-pressure steam, low-pressure steam or outlet back pressure fluctuate, the steam pressure at the heat pump outlet cannot meet the requirements, and design is required. Steam injection heat pumps with jet outlet nozzles of different diameters to meet the steam pressure requirements at the outlet of the heat pump, which leads to the use of new heat pumps with specific parameters due to changes in working conditions, which brings inconvenience and adjustable performance Difference

Chinese patent ZL201020015596.X provides a steam jet heat pump without an automatic control device, and the driving steam outlet cross-sectional area is fixed, which has poor applicability; patent ZL99255011.4 is used for vapor-liquid mixing, and only the structural form of the steam-liquid mixing chamber is designed , complex structure, no automatic control; patent ZL201120016636.7 changes the structure of the feed valve core to an open-hole type, the channel area is fixed, the structure is complex, and the automatic adjustment of the injection section cannot be realized; although the Chinese patent ZL201220266028.6 realizes the automatic control of the heat pump control, but the pressure sensor is installed on the intake pipe, which cannot ensure the stability of the outlet pressure of the heat pump. In addition, the low-pressure intake pipe is connected at right angles to two sections of straight round pipes, resulting in increased flow loss of low-pressure inlet steam

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