Heat pump unit utilizing waste heat of oily sewage through double evaporators

Abstract

The invention discloses a heat pump unit utilizing oil-containing sewage waste heat by double evaporators. Relates to the technical field of heat pump units. A refrigerant inlet pipeline of the condenser is connected with an outlet of the compressor, an inlet of the compressor is connected with refrigerant outlet pipelines of the two evaporators in parallel, the refrigerant inlet pipelines of the two evaporators are respectively provided with an expansion valve, inlet pipelines of the two expansion valves are respectively connected with an outlet of a refrigerant distribution valve, and an inlet of the refrigerant distribution valve is connected with a refrigerant outlet pipeline of the condenser. The oil-containing sewage heat pump unit has the following beneficial effects that the two evaporators connected in parallel are arranged, the waste heat recovery amount is increased, the air suction temperature is increased, the problem that in actual application of a traditional oil-containing sewage heat pump unit, the heat supply capacity is insufficient is solved, and meanwhile the problem that the heat supply capacity is attenuated in successive years is solved; the heat exchange efficiency is improved by arranging the refrigerant distribution valve, the online cleaning device switches and cleans the evaporator at regular time, and the problem that the heat exchange pipe is not clean is solved.

Description

Technical field: [0001] The invention relates to the technical field of heat pump units, in particular to a double evaporator heat pump unit utilizing waste heat from oily sewage. Background technique: [0002] The low-temperature heat source of traditional high-temperature heat pump units is usually clean water such as well water and softened water. In the late stage of oilfield development, the water content of the produced fluid is getting higher and higher, and more and more oily sewage is produced from the formation. This part of the oily sewage is dehydrated The average temperature is 34°C, and the waste heat of the oily sewage has great prospects. When the oily sewage in the oil field is used as the heat source of the traditional heat pump, there will be many extreme problems of inapplicability. The oily sewage has low heat exchange efficiency and small heating capacity, which cannot be satisfied. The heating demand, the corrosion of the oily sewage to the heat pump u...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of low calorific value and strong corrosion of oily sewage as a heat source, the present invention provides a heat pump unit with double evaporators that utilizes waste heat from oily sewage

Images