Absorption type water chilling unit for preparing low-temperature cold water

Abstract

The invention belongs to the field of refrigeration equipment, and particularly relates to an absorption type water chilling unit for preparing low-temperature cold water. The absorption type water chilling unit comprises a condenser, an absorber, an evaporator, a high-temperature regenerator, a low-temperature regenerator, a low-temperature heat exchanger, a high-temperature heat exchanger, a connecting pipeline and a solution pump, wherein a monitoring control system, a solution control pipeline and a coolant water control pipeline are additionally arranged; the monitoring control system comprises a concentration measuring device, a solution control valve and a control device; the concentration measuring device, the solution control valve and a coolant water control valve are electrically connected with the control device respectively; the concentration measuring device is connected with the evaporator; the solution control valve is arranged on the solution control pipeline; and thecoolant water control valve is arranged on the coolant water control pipeline. According to the absorption type water chilling unit for preparing the low-temperature cold water, a low-concentration lithium bromide solution is used as coolant, and the concentration of the lithium bromide solution is accurately controlled through the concentration measuring device, the solution control valve, the coolant water control valve and the control device, so that the coolant is not frozen, and the low-temperature chilled water is prepared.

Description

technical field [0001] The invention belongs to the field of refrigeration equipment, and in particular relates to an absorption chiller for producing low-temperature cold water. Background technique [0002] At present, the absorption refrigeration unit is the most widely used lithium bromide absorption unit. The unit uses lithium bromide solution as the absorbent and water as the refrigerant, and is driven by thermal energy to generally produce low-temperature cold water above 5 °C to meet the needs of air conditioning or process refrigeration. This type of unit can use waste heat for refrigeration. It is the main energy comprehensive utilization equipment in the fields of industry and energy. It is widely used in industrial waste heat recovery and refrigeration in steel, petrochemical, chemical and other industries. In fact, many industrial places have a lot of industrial waste heat on the one hand, and cold water at a lower temperature is needed on the other hand. For ex...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that the existing refrigerating unit cannot produce low-temperature cold water below 5°C, mainly adopts a two-stage cooling method to produce low-temperature frozen water at -5-0°C, the system structure is complicated, and the investment cost is relatively large. An absorption chiller for producing low-temperature cold water is provided. The unit makes full use of industrial waste heat, uses a low-concentration lithium bromide aqueous solution as a refrigerant, and precisely controls the concentration of lithium bromide solution through a monitoring control system and corresponding control pipelines to ensure cooling. The agent does not freeze, and it can produce low-temperature frozen water at about -5 to 0°C. The system is simple and the investment is small.

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