Large caliber acoustic velocity-variable supercharging heat-exchanging system

Abstract

The invention discloses a large-caliber variable sonic speed pressurizing heat exchange device. The device consists of a front reducing pipe (1), a steam jet pipe (2), a tee pipe (3), a short two-way pipe (4), a long two-way pipe (6), a back reducing pipe (7), a front mixing chamber (9) and a back mixing chamber (5), wherein the steam jet pipe is inserted into the tee pipe coaxially; the tee pipeis connected between the front reducing pipe and the short two-way pipe; the long two-way pipe is connected between the short two-way pipe and the back reducing pipe to adjust water inlet flow and steam-water mixing proportion inside the mixing chambers; and the back mixing chamber is arranged inside the short two-way pipe and improves the stream and field state of steam-water mixture through changing circulation section area. Through improving the structures of the mixing chambers, the large-caliber variable sonic speed pressurizing heat exchange device can effectively improve the stream andfield state of the steam-water mixture so as to ensure that steam-water mixing mass ratio and pressure ratio inside a heat exchanger are always in the best state. Moreover, the large-caliber variablesonic speed pressurizing heat exchange device effectively reduces equipment operation noise and operation cost and improves heat exchange efficiency and operation safety. When a steam-water parameterof a system is changed, dynamic adjustment can be realized through adjusting the positions of nozzles and the mixing chambers.

Description

Technical field [0001] The present invention is a thermal exchange technology field, mainly involving a large -caliber sound -changing heat -booster heat exchange device. Background technique [0002] The existing sound change speed booster heat exchange device can only be used for small flowing soda to exchange heat. The water inlet is less than 100 tons / hour, and the single heating area is less than 50,000 square meters.The soda hybrid logistics beam will be changed from a stratum flow state to a turbulent state. Because its mixed chamber structure is a single large diameter runway, in this way, under a single large diameter runner, the diameter of the circulation section is increased, and the flow status of the soda mixture is to the mixture of the mixtureDirect flow, due to the effects of additional stress, the fluid mass is constantly mixed with each other and collided with each other, which causes the fluid speed, temperature, and pressure to change in the radial and axis....

AI Technical Summary

Problems solved by technology

[0002]The existing variable-sonic speed booster heat exchange device can only perform small-flow steam-water heat exchange, its water intake is less than 100 tons / hour, and the heating area of ​​a single unit is less than 50,000 square meter, when the water intake further increases, the steam-water mixture flow inside the heat exchanger will change from a laminar flow state to a turbulent state. , the diameter of the flow cross-sectional area increases, and the flow state of the steam-water mixture is turbulent flow. Due to the additional shear stress, the fluid particles are constantly mixed and collided with each other, so that the fluid velocity, temperature, and pressure are generated in the radial and axial directions. Changes increase the energy loss of the fluid, making the speed and pressure of the steam-water mixture in the mixing chamber fluctuate, resulting in unstable operation of the heat exchanger

When the field state of heat exchange changes sharply, the heat exchange process cannot be carried out in a stable state

When the heat load of the heat exchanger or the heating area is large, the variable-sonic supercharged heat exchange device cannot meet the requirements of use, and the water intake is forced to increase. When the heat exchanger is running, there will be loud abnormal noise and vibration, which may easily cause pipeline and Safety accidents in heat exchange equipment

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