A heat exchange device and working method for condensing vocs gas

Abstract

The invention discloses a heat exchange device and a working method for condensing VOCs gas. The heat exchanging device of the present invention comprises a vertically arranged casing and a heat exchanging mechanism arranged in the casing; a flow equalizer for uniformly sending the refrigerant into the heat exchanging mechanism is arranged at the upper end of the casing, The housing is provided with an upper tube sheet and a lower tube sheet for fixing the heat exchange mechanism, a heat exchange cavity is formed between the upper tube sheet and the lower tube sheet, and the heat exchange mechanism includes Several layers of heat exchange units are distributed in layers, and the heat exchange units in each layer are composed of several heat exchange tubes; the heat exchange tubes in adjacent heat exchange units spiral in opposite directions. The heat exchange equipment of the present invention is compact in structure, corrosion-resistant, and ensures high-efficiency heat exchange of two fluids with large temperature differences in the same heat exchange equipment, and can be widely used in car and train loading, wharf loading, storage and transportation tank farms, and biopharmaceuticals And other industries use VOCs recovery treatment device.

Description

technical field [0001] The invention relates to a heat exchange device, in particular to a heat exchange device and a working method for condensing VOCs gas. Background technique [0002] The VOCs gas condensation recovery technology provides a low-temperature cold field by the Freon refrigeration system. Freon evaporates and absorbs heat in the heat exchange tube, and the VOCs gas outside the tube releases heat and condenses to cool down, and condenses and separates oil for recovery, thereby realizing VOCs gas purification and emission. Conventional condensing oil separation heat exchangers are in the form of vertical aluminum plate-fin heat exchangers and horizontal shell-and-tube heat exchangers. The vertical aluminum plate-fin heat exchanger is made of aluminum alloy, with high heat transfer coefficient, small channel pores, large heat transfer area, and small footprint, but it is not resistant to sulfur corrosion such as hydrogen sulfide and mercaptan sulfide. The ice-...

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Problems solved by technology

The ice-melting channel of the horizontal shell-and-tube heat exchanger is large, and the stainless steel heat exchange tube is resistant to sulfur corrosion, but the Freon horizontal lower side enters the upper side, and there is a dead angle in the oil return; the gas channel is a baffle channel, and there is a vortex dead angle, which affects the part Heat transfer effect

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