Ammonia absorption type refrigeration device for treating emptying tail gas of chemical device and recycling waste heat and recycling method

Abstract

The invention discloses an ammonia absorption type refrigeration device for treating emptying tail gas of a chemical device and recovering waste heat and a recovery method, and belongs to the technical field of absorption type refrigeration devices. An ammonia absorption type refrigeration device for treating emptying tail gas of a chemical device and recovering waste heat comprises a machine box, and further comprises a waste heat generator, a waste heat recovery device, a waste heat recovery device, a waste heat recovery device and a waste heat recovery device, the system is composed of an ammonia water solution circulation loop and an ammonia circulation loop, in the process that cooled high-concentration ammonia water solution discharged from a solution pump in the ammonia water solution circulation loop is sent back to a waste heat generator to be heated, heat of a heat regenerator, a rectifier, a heat exchanger and a stripping device is fully utilized, and the energy consumption is reduced. The low-temperature ammonia steam from the evaporator and the liquid ammonia from the condenser are subjected to cold energy recovery in the recooler, so that the refrigeration coefficient of the device is effectively improved.

Description

technical field [0001] The invention relates to the technical field of absorption refrigeration devices, in particular to an ammonia absorption refrigeration device and a recovery method for recovering waste heat from exhaust gas treatment of chemical plants. Background technique [0002] Ammonia water absorption refrigeration is a kind of refrigeration method powered by thermal energy. It was widely used before the advent of vapor compression refrigeration. The characteristic of ammonia water absorption refrigeration is that it is directly powered by thermal energy and only needs to consume a small amount of auxiliary electric energy. To achieve refrigeration, in addition, ammonia absorption refrigeration has a large refrigeration temperature range, which can not only operate under air conditioning conditions, but also be applied in various industrial refrigeration where the refrigeration temperature is below zero degrees Celsius. Therefore, under the condition of residual h...

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Problems solved by technology

[0003] However, the existing ammonia water absorption refrigeration has a low refrigeration coefficient, and the heat exchange equipment is bulky and the investment cost is high, so it is greatly restricted in the use occasions, and due to the low refrigeration coefficient, the heat released during fractionation And the cooling capacity of the low-temperature ammonia from the evaporator has not been fully utilized, resulting in a low utilization rate. Therefore, there is an urgent need for a chemical plant exhaust tail gas treatment waste heat recovery ammonia absorption refrigeration device to solve the above problems

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