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LNG gasifier water spraying system and control method

A vaporizer and water spray technology, applied in heat exchanger types, indirect heat exchangers, deicing, etc., can solve the problems of prolonged ice melting time, long time consumption, lack of automatic control of water temperature, etc., to achieve The effect of improving heat exchange efficiency, improving utilization rate, and speeding up ice melting speed

Active Publication Date: 2020-01-03
湛江新奥燃气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of melting ice takes a long time, and when the temperature is low in winter, the time for ice to melt is greatly prolonged
The existing gasifier spray technology does not make full use of water resources and heat energy, and also lacks automatic control of water temperature

Method used

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  • LNG gasifier water spraying system and control method
  • LNG gasifier water spraying system and control method
  • LNG gasifier water spraying system and control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A kind of LNG vaporizer 1 water spray system, such as figure 1 As shown, it includes an LNG vaporizer 1, a circulating pool 2, a monitoring device 9, a controller 8, and a spray device 3.

[0048] The LNG vaporizer 1 is arranged on a base 4, the base 4 is arranged on the side of the circulating pool 2, a water diversion tank 5 is arranged around the base 4, and the water diversion tank 5 is connected to the The circulating pool 2 is connected, and the spray water flows back to the circulating pool 2 through the water diversion tank 5.

[0049] The upper part of the circulating pool 2 is provided with an inlet pipe 201, and the lower part is provided with a drain pipe 202. The inlet pipe 201 and the drain pipe 202 are respectively provided with valves, which are the inlet pipe valve 203 and the drain pipe valve 204; The side wall and the bottom of the pool 2 are also separately installed with heating devices, which are the side wall heating device 12 and the bottom heating de...

Embodiment 2

[0071] The rest is the same as embodiment 1, the difference is that there is no water blocking layer 104 in the heat exchange tube group, such as Figure 5 , And the fin 1031 on the heat exchange tube 103 is spiral from top to bottom along the outer wall of the heat exchange tube 103, the spiral angle is 45-80°, and the fin 1031 is a thread-like spiral, from top to bottom. The spacing between the lower adjacent spirals increases successively, so that the residence time of the spray water is gradually shortened from top to bottom, and the heat exchange rate is improved.

Embodiment 3

[0073] The rest is the same as in Embodiment 2. The fins 1031 on the heat exchange tube 103 are spirally shaped from top to bottom along the outer wall of the heat exchange tube 103, except that the helix angle is 15-45°. The inner wall of the heat exchange tube 103 is as Image 6 , Figure 7 Smooth inner wall as shown, or as Picture 8 , Picture 9 The spiral shape shown is coaxial with the fin 1031 on the outer wall. The spiral inner wall increases the contact area between the liquefied gas and the inner wall, reduces the flow rate of the liquefied gas, and at the same time generates turbulence, which is beneficial to heat exchange.

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Abstract

An LNG gasifier water spraying system comprises an LNG gasifier, a circulation water pool, a monitor device, a controller and a spraying device. The LNG gasifier is arranged on a base. A water guide trough connected with the circulation water pool is arranged around the base. Heating devices are independently mounted on the side wall and the bottom of the circulation water pool. The monitor devicecomprises a first temperature detector on a water inlet pipe, a second temperature detector in the circulation water pool and a liquid level detector. The controller controls opening and closing of avalve and the heating devices according to transmitted temperature signals and liquid level signals. Multiple water stop layers are arranged in the middle of a heat exchange pipe set on the gasifier.Fins of heat exchange pipes are spirally distributed in different forms. By means of the LNG gasifier water spraying system, heat exchange efficiency is greatly improved, the intelligent control method is adopted, the relations between water inlet heat, consumed heat, the water quantity and electric energy are balanced, natural water heat energy is utilized to the greatest extent, meanwhile, normal use is not influenced, automatic control can be achieved, and control precision is high.

Description

Technical field [0001] The invention relates to the technical field of gasification of liquefied natural gas (LNG), in particular to a water spray system and a control method of an LNG vaporizer. Background technique [0002] Air-heated vaporizer is a heat exchange device that uses natural convection of air to heat low-temperature LNG to vaporize it into room temperature gas. The existing LNG air-heated vaporizers on the market are made of aluminum finned tubes connected at a certain distance. The outer surface of the vaporizer is very easy to freeze during use. If the ice layer is too thick, it is not good for the vaporizer. Normal use. In the actual use process, after the vaporizer has accumulated a certain thickness of ice, it is necessary to stop using the vaporizer, and the surface ice layer of the vaporizer must be melted by atmospheric temperature before it can be used. The process of melting ice takes a long time, and in the case of lower temperatures in winter, the mel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28F27/00F28D1/047F28F1/36F28F17/00
CPCF28D1/0478F28F1/36F28F17/00F28F27/00F28F2265/14
Inventor 吴俊铿梁锦秀虢德鹤何丹林土志莫嘉杰
Owner 湛江新奥燃气有限公司
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