S-tube bundle falling film absorber

Abstract

The invention provides an S-shaped tube bundle falling film absorber, which includes a casing, a cylinder body, a liquid distribution device, a cooling device and a plurality of air holes, the cylinder body is arranged in the casing; the liquid distribution device and the cooling device are all arranged in the In the cylinder, the liquid distribution device is arranged above the cooling device; the air holes include a first air hole and a second air hole, and the first air hole and the second air hole are arranged on the side wall of the cylinder body; along the height direction, the liquid distribution device and the cooling device are both It is arranged between the first air hole and the second air hole; the bottom of the cylinder is also provided with an outlet. The invention adopts an "S-shaped" heat exchange tube bundle, which effectively improves the uniformity of liquid distribution of the solution outside the "S-shaped" heat exchange tube bundle. It has the advantages of large specific surface area, uniform liquid distribution, long time for the solution to reside on the heat exchange surface, and the induction of solution mixing to promote absorption, heat and mass transfer, etc., thereby significantly improving the absorption performance of falling film; when the characteristic size of the pipe diameter is small, it can realize small scale Heat and mass transfer.

Description

technical field [0001] The invention relates to the field of heat exchangers, in particular to an S-shaped tube bundle falling film absorber. Background technique [0002] At present, there is still a large room for improvement in the utilization rate, economic benefits and ecological benefits of energy utilization in China. Improving the comprehensive utilization rate of energy is the fundamental way to solve my country's energy problems. The solution is mainly to improve the efficiency of energy application systems. The correct selection of working fluid, the improvement of system structure and the enhancement of heat and mass transfer performance are the three main measures to improve the efficiency of energy application systems. Falling film absorbers are widely used in industrial processes such as absorption refrigeration, heat pumps, power generation, heat storage, electric power, and chemical industry, and are common heat and mass transfer equipment. Partition-wall f...

AI Technical Summary

Problems solved by technology

The traditional falling film absorber has a large heat transfer and mass transfer characteristic size of the heat exchange tube and a thick liquid film on the surface of the heat exchange tube, resulting in a low heat transfer coefficient between the coolant and the liquid film, and a relatively stable mass transfer coefficient in the liquid film Low

[0004] (2) poor wettability

The liquid film of the traditional falling film absorber has a short residence time on the surface of the heat exchanger, and there is not enough time for heat and mass transfer, resulting in incomplete absorption

[0006] (4) The falling film absorber has a large volume

This invention mainly focuses on the distribution strategy of different fluids in the absorber, and optimizes the pipe layout and structure of the heat exchange equipment. However, the falling film absorber structure described in this patent adopts spiral pipe layout, and the specific surface area of ​​the heat exchange tubes is still small. , poor wettability, insufficient utilization of unit space, large absorber volume, etc.

The Chinese patent publication number is: CN 203053091 U, and the patent name is: a plate-fin falling film absorber. This utility model patent increases the heat exchange area by adding plate fins. The pipe still adopts the traditional spiral pipe method. The addition of fins does not significantly improve the shortcomings of small specific surface area, poor wettability, insufficient utilization of unit space, and large absorber volume of heat exchange tubes

The position of the air inlet and the air outlet is very close, and the quality of the exhaust gas at the air outlet cannot be guaranteed

Chinese patent authorization number: CN 202844835 U, patent name: falling film absorber, this utility model patent is a vertical absorber, the film is formed in the tube for absorption and exothermic process, which can achieve better absorption effect, but in the tube In the laminar flow stage after film formation, the absorption effect will gradually become worse, and the heat and mass transfer specific surface area will be small

Although the holes of the liquid distribution device are evenly distributed, the inlet setting of the solution will still cause the solution to concentrate in a small area and fall, and the addition of a mesh structure will make it difficult for the locked liquid to flow down, and most of it will remain in the mesh. not used in the structure

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