Environment-friendly and efficient energy-saving direct-fired-type lithium bromide absorption type cold and hot water unit

Abstract

The invention relates to an environment-friendly and efficient energy-saving direct-fired-type lithium bromide absorption type cold and hot water unit. The environment-friendly and efficient energy-saving direct-fired-type lithium bromide absorption type cold and hot water unit is characterized in that as for the unit, a flue gas heat exchanger (17) is arranged on a smoke exhaust pipe of a direct-fired high-pressure generator first, and a flue gas solution heat exchanger (28), a flue gas solution heat exchanger dilute solution inlet pipeline (29) and a flue gas solution heat exchanger dilute solution outlet pipeline (30) are also arranged additionally. During operating of a refrigeration work condition, a dilute solution enters the flue gas solution heat exchanger to recover flue gas wasteheat, and flue gas releases heat and is discharged after the temperature decreases. During operating of a heating work condition, low-temperature circulating water of a heating evaporator enters theflue gas heat exchanger to recover the flue gas waste heat, the dilute solution enters the flue gas solution heat exchanger to heat the normal-temperature flue gas, and the flue gas after the relativehumidity reduces absorbs the heat and is discharged after the temperature rises. According to the environment-friendly and efficient energy-saving direct-fired-type lithium bromide absorption type cold and hot water unit, a chimney can adopt a conventional material and has no special requirements, the flue gas heat can be recycled while white smoke is effectively eliminated, the overall energy efficiency of the unit is improved, and the energy-saving and environment-friendly effects are achieved.

Description

technical field [0001] The invention relates to an environment-friendly, high-efficiency and energy-saving direct-fired lithium bromide absorption type cold and hot water unit. It belongs to the technical field of air conditioning equipment. Background technique [0002] Ordinary direct-fired lithium bromide absorption cold and hot water units such as figure 1 As shown, it consists of direct-fired high-pressure generator 1, low-pressure generator 9, condenser 8, evaporator 5, absorber 4, low-temperature solution heat exchanger 3, high-temperature solution heat exchanger 2, heating concentrated solution switching valve 10, heating The refrigerant vapor switching valve 11, the solution pump 6, the refrigerant pump 7, valves and control systems (not shown in the figure) and the pipelines connecting the various components are composed. When the unit is running in cooling mode, the exhaust gas temperature is around 170°C; when the unit is running in heating mode, if the outlet ...

AI Technical Summary

Problems solved by technology

However, due to the high content of water vapor in the flue gas from natural gas combustion, the outdoor temperature is low in winter, and the exhaust gas temperature at room temperature is lower than the dew point temperature of the flue gas, there will still be condensate in the chimney, and the conventional carbon steel chimney will be corroded by the condensate. Special requirements are put forward for the material of the chimney. The chimney must be made of corrosion-resistant materials, and the investment cost will increase.

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