Steam jet vacuum pump unit utilizing process waste heat and exhaust steam waste heat

Abstract

The invention discloses a steam jet vacuum pump unit utilizing process waste heat and exhaust steam waste heat. The steam jet vacuum pump unit comprises a hot water tank bin A, a hot water tank bin B,a steam jet vacuum pump unit body and an absorption refrigerator. The hot water tank bin A is used for containing heat source water. The hot water tank bin B is used for containing secondary low-temperature water. The steam jet vacuum pump unit body is arranged in multiple stages and sequentially connected in series from front to back. Each stage consists of a condenser and a jet pump which are connected in series from front to back. An outlet of the jet pump at the last stage is connected with the hot water tank bin A through a pipeline and used for guiding waste steam into the heat source water in the hot water tank bin A. The inlet end and the outlet end of an evaporator of the absorption refrigerator are connected with the hot water tank bin B and a hot water tank bin D respectively through pipelines correspondingly, a low-temperature water circulation channel is formed, and after low-temperature water is cooled in the low-temperature water circulation channel, the low-temperaturewater is obtained at the outlet end. According to the vacuum pump unit, the low-temperature water which cannot be stably supplied in the natural environment is produced through heat of the zero-pressure waste steam and serves as cooling water of the condensers, and working steam and the cooling water are saved.

Description

technical field [0001] The invention belongs to the technical field of waste heat utilization, and in particular relates to a steam jet vacuum pump unit utilizing process waste heat and exhaust steam waste heat. Background technique [0002] Steam jet vacuum pumps are widely used in many industrial fields, such as vacuum degassing of molten steel, concentration of pharmaceutical raw materials, purification of natural pigments, molecular distillation, petroleum distillation, fractionation, urea synthesis and granulation, edible oil refining, aerospace and aeroengine high-altitude simulation Taiwan and so on. [0003] Steam jet vacuum pump has two application forms: steam jet vacuum pump unit and steam jet water ring vacuum pump unit. Only in the final stage of the steam jet vacuum pump unit, a large amount of steam is discharged, and at the same time, there is a large amount of waste heat to be used in the production process. [0004] There are two types of steam jet vacuum...

AI Technical Summary

Problems solved by technology

And in the high temperature and high humidity weather in summer, the efficiency of the cooling tower decreases, and the cooling water exceeds 35 degrees, which seriously affects the vacuum degree required by the process, resulting in a sharp increase in the product failure rate

In addition, the waste steam discharged from the final jet pump is discharged into the final condenser and condensed by cooling water. The exhausted waste steam contains a lot of heat and needs a large amount of cooling water to condense, and then sent to the cooling tower to cool down. On the one hand, it increases the cooling capacity. Tower load and cooling water volume, while wasting a lot of waste heat

In addition, the steam jet vacuum pump unit uses working steam with a pressure of 1.0-1.5MPa.G, which not only increases the cost of equipment and valves, but also limits the application of central heating and the utilization of waste heat

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