A hot water system based on printing and dyeing sewage source heat pump

Abstract

The utility model belongs to new energy technology field, concretely is a kind of based on printing and dyeing sewage source heat pump hot water system, including compressor, sanitary hot water shell pipe heat exchanger, four-way reversing valve, gas-liquid separator, printing and dyeing sewage source side plate heat exchanger, printing and dyeing sewage side circulating water pump and immersed spiral pipe heat exchanger, the both ends of compressor are respectively communicated with sanitary hot water shell pipe heat exchanger and gas-liquid separator.The utility model system environmental protection benefit is remarkable: utilize printing and dyeing sewage as heat source, avoid the combustion process of traditional coal-fired, gas and other boiler system, reduce the emission of waste gas, waste water and solid waste;Efficient energy saving: in winter, the temperature of printing and dyeing sewage is higher than ambient air temperature, improves the evaporation temperature of heat pump cycle, thereby improves energy efficiency ratio;Stable operation: the temperature of printing and dyeing sewage is relatively stable throughout the year, fluctuation range is smaller, so that heat pump system operation is more reliable and stable.There is no winter defrosting and other difficult problems of air source heat pump.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a hot water system based on a dyeing and printing wastewater source heat pump. Background Technology

[0002] Currently, buildings require significant amounts of energy for heating, air conditioning, lighting, and electricity use, with cooling and heating consuming the largest share. As global emphasis on environmental protection and sustainable development grows, the application of renewable energy in the building sector will become increasingly widespread. Global environmental issues have made reducing buildings' energy demands a crucial topic. By adopting energy-saving technologies, promoting sustainable building materials, and developing renewable energy, we can reduce building energy consumption and environmental impact, thus promoting sustainable energy development.

[0003] Dyeing and printing wastewater is discharged into the sewage pipe network at a temperature of 20-35℃. The wastewater source heat pump hot water system is a system that utilizes the low-quality energy in dyeing and printing wastewater and converts it into high-quality heat energy through heat pump technology to produce hot water.

[0004] However, existing air source heat pump water heating systems suffer from performance degradation due to a drop in ambient temperature. Utility Model Content

[0005] The purpose of this invention is to solve the problem of performance degradation caused by the drop in ambient temperature in air source heat pump water heating systems mentioned in the background art, and to propose a water heating system based on dyeing and printing wastewater source heat pump.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A heat pump system for producing hot water based on dyeing and printing wastewater source includes a compressor, a domestic hot water shell-and-tube heat exchanger, a four-way reversing valve, a first gas-liquid separator, a dyeing and printing wastewater source side plate heat exchanger, a dyeing and printing wastewater source circulating water pump, and a submerged spiral tube heat exchanger. The compressor is connected at both ends to the domestic hot water shell-and-tube heat exchanger and the first gas-liquid separator, respectively. The domestic hot water shell-and-tube heat exchanger and the second gas-liquid separator are connected via the four-way reversing valve. The second gas-liquid separator is connected to the dyeing and printing wastewater source side plate heat exchanger. The dyeing and printing wastewater source side plate heat exchanger is connected at both ends to the dyeing and printing wastewater source circulating water pump and the submerged spiral tube heat exchanger, respectively. The submerged spiral tube heat exchanger has a dyeing and printing wastewater inlet and an outlet at both ends, respectively.

[0007] Preferably, a solenoid valve and a thermal expansion valve are provided between the second gas-liquid separator and the side plate heat exchanger of the dyeing and printing wastewater source.

[0008] Preferably, a temperature sensor is connected to one end of the thermal expansion valve.

[0009] Preferably, a filter is installed at the inlet of the dyeing and printing wastewater.

[0010] Preferably, the side plate heat exchanger for the dyeing wastewater source is connected to the submerged spiral tube heat exchanger via a first valve and a second valve.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The system of this utility model has significant environmental benefits: by using dyeing and printing wastewater as a heat source, the combustion process of traditional coal-fired and gas-fired boiler systems is avoided, thereby reducing the emission of waste gas, wastewater and solid waste. The system of this utility model is highly efficient and energy-saving: In winter, the temperature of dyeing wastewater is higher than that of ambient air, which increases the evaporation temperature of the heat pump cycle, thereby improving the energy efficiency ratio. The system operates stably in this invention: the temperature of dyeing and printing wastewater remains relatively stable throughout the year with minimal fluctuations, making the heat pump system more reliable and stable. It also eliminates the difficulties associated with winter defrosting common in air-source heat pumps. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a heat pump system for producing hot water based on dyeing and printing wastewater.

[0013] In the diagram: 1 Compressor, 2 First gas-liquid separator, 3 Domestic hot water shell-and-tube heat exchanger, 4 Four-way reversing valve, 5 Dyeing and printing wastewater source side plate heat exchanger, 6 Temperature sensor, 7 Thermal expansion valve, 8 Solenoid valve, 9 Second gas-liquid separator, 10 Filter, 11 Dyeing and printing wastewater source side circulating water pump, 12 Submerged spiral tube heat exchanger, 13 Dyeing and printing wastewater inlet, 14 Dyeing and printing wastewater outlet, 15 Valve, 16 Valve. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0015] Reference Figure 1 A heat pump system for producing hot water based on dyeing and printing wastewater source includes a compressor 1, a domestic hot water shell-and-tube heat exchanger 3, a four-way reversing valve 4, a first gas-liquid separator 2, a dyeing and printing wastewater source side plate heat exchanger 5, a dyeing and printing wastewater side circulating water pump 11, and a submerged spiral tube heat exchanger 12. The two ends of the compressor 1 are connected to the domestic hot water shell-and-tube heat exchanger 3 and the first gas-liquid separator 2, respectively. In this embodiment, the domestic hot water shell-and-tube heat exchanger 3 and the second gas-liquid separator 9 are connected by a four-way reversing valve 4; the second gas-liquid separator 9 is connected to the dyeing and printing wastewater source side plate heat exchanger 5, and a solenoid valve 8 and a thermal expansion valve 7 are provided between the second gas-liquid separator 9 and the dyeing and printing wastewater source side plate heat exchanger 5, thus forming a refrigerant pipeline circulation; one end of the thermal expansion valve 7 is connected to a temperature sensor 6, and the thermal expansion valve 7 performs an action according to the temperature sensor 6. In this embodiment, the two ends of the dyeing wastewater source side plate heat exchanger 5 are respectively connected to the dyeing wastewater source side circulating water pump 11 and the submerged spiral tube heat exchanger 12. The dyeing wastewater source side plate heat exchanger 5 and the submerged spiral tube heat exchanger 12 are connected through the first valve 15 and the second valve 16. In this embodiment, the two ends of the submerged spiral heat exchanger 12 are respectively provided with a dyeing wastewater inlet 13 and a dyeing wastewater outlet 14, and a filter 10 is provided at the dyeing wastewater inlet 13.

[0016] In this embodiment, the process of the dyeing wastewater source heat pump hot water system is as follows: Dyeing wastewater at 20-35℃ flows through a pipe inlet to heat the circulating water inside the submerged spiral tube heat exchanger. The heated circulating water is then transported to the dyeing wastewater source side plate heat exchanger by the dyeing wastewater source circulating water pump. After absorbing heat and decreasing in temperature, the water returns to the submerged spiral tube heat exchanger for heating. When the hot water tank temperature is lower than the set value, the refrigerant flows through the compressor 1, and sequentially through the domestic hot water shell-and-tube heat exchanger 3, the four-way valve 4, the second gas-liquid separator 9, the solenoid valve 8, the thermal expansion valve 7, and the dyeing wastewater source side plate heat exchanger 5, before returning to the compressor 1.

[0017] In this embodiment, the system offers significant environmental benefits: utilizing dyeing and printing wastewater as a heat source avoids the combustion process of traditional coal-fired or gas-fired boiler systems, reducing emissions of waste gas, wastewater, and solid waste; it is highly efficient and energy-saving: in winter, the temperature of the dyeing and printing wastewater is higher than the ambient air temperature, increasing the evaporation temperature of the heat pump cycle and thus improving the energy efficiency ratio; and it operates stably: the temperature of the dyeing and printing wastewater remains relatively stable throughout the year with minimal fluctuations, making the heat pump system more reliable and stable. It also avoids the difficulties associated with defrosting in winter common with air-source heat pumps.

[0018] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heat pump system for producing hot water based on dyeing and printing wastewater source, comprising a compressor (1), a shell-and-tube heat exchanger for domestic hot water (3), a four-way reversing valve (4), a first gas-liquid separator (2), a side-plate heat exchanger for dyeing and printing wastewater source (5), a circulating water pump for dyeing and printing wastewater source (11), and a submerged spiral tube heat exchanger (12), characterized in that: The compressor (1) is connected to the shell-and-tube heat exchanger (3) for domestic hot water and the first gas-liquid separator (2) at both ends respectively; the shell-and-tube heat exchanger (3) for domestic hot water and the second gas-liquid separator (9) are connected by a four-way reversing valve (4); the second gas-liquid separator (9) is connected to the side plate heat exchanger (5) for dyeing and printing wastewater source, and the two ends of the side plate heat exchanger (5) for dyeing and printing wastewater source are connected to the circulating water pump (11) for dyeing and printing wastewater source and the submerged spiral tube heat exchanger (12) at both ends respectively. The submerged spiral tube heat exchanger (12) is provided with a dyeing and printing wastewater inlet (13) and a dyeing and printing wastewater outlet (14) at both ends respectively.

2. The hot water system based on a dyeing and printing wastewater source heat pump according to claim 1, characterized in that: A solenoid valve (8) and a thermal expansion valve (7) are provided between the second gas-liquid separator (9) and the side plate heat exchanger (5) of the dyeing and printing wastewater source.

3. A heat pump system for producing hot water based on dyeing and printing wastewater source as described in claim 2, characterized in that: A temperature sensor (6) is connected to one end of the thermal expansion valve (7).

4. A heat pump system for producing hot water based on dyeing and printing wastewater source as described in claim 1, characterized in that: A filter (10) is installed at the inlet (13) of the dyeing and printing wastewater.

5. A heat pump system for producing hot water based on dyeing and printing wastewater source as described in claim 1, characterized in that: The side plate heat exchanger (5) of the dyeing wastewater source is connected to the submerged spiral tube heat exchanger (12) through a first valve (15) and a second valve (16).

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