Discharging device and method for condensate water of steam heat exchanger

Abstract

The invention discloses a steam heat exchanger condensate water discharging device which comprises a condensate water tank arranged below a steam heat exchanger, a condensate water discharging opening is formed in the lower end of the steam heat exchanger, a water inlet is formed in the top of the condensate water tank, and the condensate water discharging opening is directly connected to the water inlet. Or the condensate water outlet is connected to the water inlet through a straight pipe; the bottom of the condensate water tank is connected with a drain pipe, and a demineralized water pipe is connected to the drain pipe; a drain valve is installed on the drain pipe, a water inlet valve is installed on the demineralized water pipe, and the connecting point of the demineralized water pipe and the drain pipe is located on the side, away from the condensate water tank, of the drain valve. The invention further discloses a condensate water discharging method adopting the discharging device. The heat exchange efficiency and the service life of the steam heat exchanger can be guaranteed.

Description

technical field [0001] The invention relates to a device for discharging condensed water of a steam heat exchanger and a method for discharging condensed water using the same. Background technique [0002] Steam heat exchangers all need to discharge condensed water. At present, in order to make full use of low-temperature heat energy, condensed water is generally collected as a low-temperature heat source or reused as soft water. Because there is no obvious height difference between the return water pipe and the heat exchanger, or there is a height difference but the pipe diameter is insufficient, it is easy to cause poor drainage of condensed water, resulting in fluctuations in the heat exchange efficiency of the steam heat exchanger . [0003] In such a state of poor drainage, water will accumulate at the bottom of the steam heater intermittently, so that the bottom area of ​​the steam heat exchanger is always in a state of alternating contact with steam and condensed wat...

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Problems solved by technology

[0002] Steam heat exchangers all need to discharge condensed water. At present, in order to make full use of low-temperature heat energy, condensed water is generally collected as a low-temperature heat source or reused as soft water. Therefore, corresponding Since there is no obvious height difference between the return water pipe and the position of the heat exchanger, or there is a height difference but the pipe diameter is insufficient, it is easy to cause poor drainage of condensed water, resulting in fluctuations in the heat transfer efficiency of the steam heat exchanger

[0003] In such a state of poor drainage, water will accumulate intermittently at the bottom of the steam heater, so that the bottom area of ​​the steam heat exchanger is always in a state of alternating contact with steam and condensed water, resulting in the plate at the bottom of the steam heat exchanger being frequently The state of expansion and contraction is prone to material fatigue aging, cracks, leakage, and further reducing the service life of the steam heat exchanger

In addition, since the condensed water is discharged from the steam heat exchanger in the state of a mixture of steam and water at the boiling point, it is easy to cause water hammer and erosion, reducing the service life of the pipeline

[0004] In addition, since the condensed water is discharged into the recycling pipeline and then decompressed, the condensed water at the saturation temperature will release steam, which will accumulate at the high point of the pipeline to form air resistance

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