Steam heat exchanger

Abstract

The invention relates to the field of steam heat exchange. A steam heat exchanger comprises a heat exchanger body, a liquid level sensor and a drain valve. The heat exchanger body comprises an air inlet cavity, a heat dissipation pipe and a liquid storage cavity, the air inlet cavity is located on the upper portion, the liquid storage cavity is located on the lower portion, and the heat dissipation pipe is vertically arranged and communicates with the air inlet cavity and the liquid storage cavity; condensed water generated by the steam is converged into the liquid storage cavity under the action of gravity, so that the generation of a water hammer is reduced; the water level of the condensate water gradually rises to immerse the bottom of the radiating pipe, so that the upper part of the radiating pipe is used for steam heat exchange, and the bottom is used for recooling the condensate water; by means of the design, the structure of the heat exchanger body is simplified, and a condensate water cooling device does not need to be additionally arranged. When the water level rises to a preset position, the liquid level sensor triggers to open the drain valve to drain water, and drainage is stopped when the water level drops to the preset position. Due to the fact that the liquid storage cavity is arranged, the condensate water is much and is not required to be drained, the exhaust phenomenon is not prone to being generated, high-speed fluid cannot be generated inside, and damage of a water hammer is reduced.

Description

Technical Field

[0001] The invention relates to the field of steam heat exchange. Background Art

[0002] Steam heat exchanger is a device that uses steam as a heat source to heat water or air. The efficiency of steam latent heat is much higher than that of hot water. For example, the latent heat released by condensing 1kg of water vapor is more than 10 times that of 1kg of hot water. Steam heat exchange is a better way of heat exchange. However, if the condensed water in the pipe of the steam heat exchanger cannot be discharged in time, the steam will easily condense into water instantly when it contacts the water droplets, causing the volume of the steam to shrink suddenly, thus generating a vacuum, which will drive the water droplets in the pipe to move at high speed, forming a water hammer, causing the vibration of the heat exchanger, and in severe cases, damaging the heat exchanger pipe, and even causing an accident.

[0003] The steam heat exchanger has a high pressure inside, and the temperature of the steam after condensation is still higher than 100 degrees Celsius. Directly discharging it will waste a lot of heat and is not safe. Most steam heat exchangers have an additional heat exchanger to cool the discharged condensed water to a temperature close to the ambient temperature. This product structure is relatively complex. Summary of the invention

[0004] In order to reduce the degree of damage caused by water hammer and reduce the complexity of product structure, the present invention provides a steam heat exchanger.

[0005] The technical solution adopted by the present invention to solve its technical problem is: A steam heat exchanger includes a heat exchanger body, a liquid level sensor, and a steam trap. The heat exchanger body includes an air inlet chamber, a heat dissipation pipe, and a liquid storage chamber. The air inlet chamber is located at the top, and the liquid storage chamber is located at the bottom. The heat dissipation pipe is placed vertically, connecting the air inlet chamber and the liquid storage chamber. The condensed water generated by the steam flows into the liquid storage chamber under the action of gravity, and the water level gradually rises to immerse the bottom of the heat dissipation pipe, so that the upper part of the heat dissipation pipe is used for steam heat exchange, and the bottom is used for re-cooling of the condensed water. When the water level rises to a preset position, the steam trap is opened to drain water by triggering the liquid level sensor, and the drainage stops when the water level drops to the preset position. The heat exchanger body also includes a drain valve, which is used to discharge the condensed water after the steam heat exchanger stops working.

[0006] The beneficial effects of the present invention are: A steam heat exchanger includes a heat exchanger body, a liquid level sensor, and a steam trap. The heat exchanger body includes an air inlet cavity, a heat dissipation pipe, and a liquid storage cavity. The air inlet cavity is located at the top, and the liquid storage cavity is located at the bottom. The heat dissipation pipe is placed vertically, connecting the air inlet cavity and the liquid storage cavity. The condensed water generated by the steam flows into the liquid storage cavity under the action of gravity, thereby reducing the generation of water hammer. The water level of the condensed water gradually rises and submerges the bottom of the heat dissipation pipe, so that the upper part of the heat dissipation pipe is used for steam heat exchange, and the bottom is used for re-cooling of the condensed water. This design simplifies the structure of the heat exchanger body, and no additional cooling device for the condensed water is required. When the water level rises to a preset position, the steam trap is triggered by the liquid level sensor to open the drain valve, and the drain stops when the water level drops to the preset position. Due to the presence of the liquid storage cavity, the condensed water is more and does not seek to be drained, so it is not easy to produce exhaust phenomenon, and no high-speed fluid is generated inside, which reduces the damage of water hammer and prolongs the product life. The heat exchanger body also includes a drain valve, which is used to discharge the condensed water after the steam heat exchanger stops working, and can avoid damage caused by freezing of the condensed water in winter. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 Schematic diagram of the structure of the steam heat exchanger according to the present invention.

[0008] In the figure, 1. heat exchanger body, 2. liquid level sensor, 3. steam trap, 4. drain valve, 11. air inlet chamber, 12. heat dissipation pipe, 13. liquid storage chamber, 121. steam heat exchange area, 122. condensate recooling area, 123. upper water level, 124. lower water level. Implementation

[0009] The present invention is further described below in conjunction with the accompanying drawings and embodiments. Example

[0010] exist Figure 1 In one embodiment, the present invention is a steam heat exchanger.

[0011] like Figure 1 As shown: A steam heat exchanger comprises a heat exchanger body 1, a liquid level sensor 2, and a steam trap 3. The heat exchanger body 1 comprises an air inlet chamber 11, a heat dissipation pipe 12, and a liquid storage chamber 13. The air inlet chamber 11 is located at the top, and the liquid storage chamber 13 is located at the bottom. The heat dissipation pipe 12 is placed vertically, connecting the air inlet chamber 11 and the liquid storage chamber 13. The condensed water generated by the steam flows into the liquid storage chamber 13 under the action of gravity, and the water level gradually rises to immerse the bottom of the heat dissipation pipe 12, so that the upper part of the heat dissipation pipe 12 becomes a steam heat exchange area 121, and the bottom becomes a condensed water recooling area 122. When the water level rises to the upper water level 123, the steam trap 3 is opened to drain water by the liquid level sensor 2, and the water level stops draining when the water level drops to the lower water level 124. The heat exchanger body 1 also comprises a drain valve 4, which is used to discharge condensed water after the steam heat exchanger stops working.

Claims

1. A steam heat exchanger, characterized in that: It comprises a heat exchanger body, which comprises an air inlet cavity, a heat dissipation pipe and a liquid storage cavity. The air inlet cavity is located at the top, and the liquid storage cavity is located at the bottom. The heat dissipation pipe is placed vertically to connect the air inlet cavity and the liquid storage cavity. The upper part of the heat dissipation pipe is used for steam heat exchange, and the bottom part of the heat dissipation pipe is used for re-cooling of condensed water.

2. The steam heat exchanger according to claim 1, characterized in that: The device comprises a liquid level sensor and a steam trap. When the water level of condensed water rises to a preset position, the liquid level sensor triggers the steam trap to open for drainage, and when the water level of condensed water drops to a preset position, drainage is stopped.

3. The steam heat exchanger according to claim 1 or 2, characterized in that: The heat exchanger body also includes a drain valve for draining condensed water after the steam heat exchanger stops working.

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