Waste heat recovery heat pump unit

Abstract

The invention relates to a heat pump unit for recycling afterheat of wastewater, comprising a hot water tank, a heat pump, a wastewater tapping well, a wastewater storage tank, a preheat exchanger, a hot water circulating pump, a wastewater preheating diving pump, a wastewater circulating pump, an electromagnetic valve, a check valve, a filter, a water level controller and a temperature controller. Both ends of a heat-releasing pipeline of the preheat exchanger are connected with a wastewater inlet pipeline and a wastewater outlet pipeline, and divided into two paths through a heat-releasing pipeline of a heat pump water-cooling evaporator, wherein one path is connected to the interior of the wastewater storage tank, and the other path is connected with a sink hole; one end of the heat-absorbing pipeline of the preheat exchanger is connected with tap water for the electromagnetic valve to control whether to supplement water to the water tank or not according to the water level of in the hot water tank; the other end of the heat-absorbing pipeline of the preheat exchanger is connected with a water inlet pipe of a heat-absorbing pipeline of a condenser; and the water inlet pipe and the water outlet pipe of the heat-absorbing pipeline of the condenser are respectively connected with the hot water tank. The invention has reasonable structure, fully recycles the wastewater afterheat and has very high heating efficiency.

Description

technical field [0001] The invention relates to a heat pump unit for recovering waste heat from waste water, which belongs to the field of energy technology, in particular to a heat pump unit for recovering waste heat in bathing places and other industrial and civil waste water. Background technique [0002] We know that domestic bathing places mainly use coal-fired boilers, oil-fired boilers, gas-fired boilers, electric boilers and solar water heaters to prepare hot water for bathing at present. Coal-fired boilers have the disadvantages of environmental pollution and large footprint; oil-fired boilers are greatly affected by fuel supply and price fluctuations; gas-fired boilers have high safety requirements and gas supply problems; electric boilers use high-grade electric energy to produce Hot water is a waste in terms of energy quality, and the cost of use is high, and the power consumption is too large; although the cost of solar water heaters is low, the initial investme...

AI Technical Summary

Problems solved by technology

Coal-fired boilers have the disadvantages of environmental pollution and large footprint; oil-fired boilers are greatly affected by fuel supply and price fluctuations; gas-fired boilers have high safety requirements and gas supply problems; electric boilers use high-grade electric energy to produce Hot water is a waste in terms of energy quality, and the cost of use is high, and the power consumption is too large; although the cost of solar water heaters is low, the initial investment cost is high, the site area is large, and the heating time is greatly affected by the weather. long disadvantage

In addition, the amount of hot water used in bathing places is large, and the bathing wastewater is directly discharged, a large amount of heat in the wastewater is lost, and energy is wasted seriously; and the discharge of hot water also has an impact on the ecological environment, which is another source of environmental pollution

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