A wastewater discharge heat energy reduction device

Abstract

This utility model discloses a wastewater discharge heat energy reduction device, belonging to the technical field of wastewater discharge heat energy reduction devices. It includes a liquid-liquid plate heat exchanger and a gas-gas plate heat exchanger. The hot water outlet pipe of the liquid-liquid plate heat exchanger is connected to a water heat energy consumption component, and the wastewater outlet pipe of the liquid-liquid plate heat exchanger is connected to a diverter. This utility model, equipped with a liquid-liquid plate heat exchanger, a gas-gas plate heat exchanger, a gas heat energy consumption component, a liquid heat energy consumption component, and a spray absorption tower, can perform graded heat energy recovery and utilization of high-temperature wastewater and waste gas generated during the production of microfiber leather, forming a complete energy recycling system, significantly improving energy utilization efficiency and reducing enterprise production energy costs.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage discharge heat energy reduction devices, specifically a sewage discharge heat energy reduction device. Background Technology

[0002] Microfiber polyurethane synthetic leather, also known as microfiber leather, is made by needle-punching microfiber short fibers into a three-dimensional network structure nonwoven fabric, followed by polyurethane resin impregnation, fiber opening, and finishing processes. Microfiber leather has extremely excellent water vapor permeability, aging resistance, and abrasion resistance, and has gradually replaced genuine leather.

[0003] Microfiber leather production, especially wet production lines, is a typical high-energy-consuming and high-polluting process. The core energy consumption and pollution sources are the huge heat energy consumption, as the coagulation tank and washing tank require a lot of heating, and the drying oven requires a lot of heat energy. Pollution emissions are concentrated, mainly wastewater and exhaust gas containing dimethylformamide. Utility Model Content

[0004] The purpose of this invention is to provide a wastewater discharge heat energy reduction device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wastewater discharge heat energy reduction device, comprising a liquid-liquid plate heat exchanger and a gas-gas plate heat exchanger, wherein a water heat energy consumption component is connected to the hot water outlet pipe of the liquid-liquid plate heat exchanger, and a diverter is connected to the wastewater outlet pipe of the liquid-liquid plate heat exchanger.

[0006] The hot gas outlet pipe of the gas-to-gas plate heat exchanger is connected to a gas heat energy consumption component. The waste gas outlet pipe of the gas-to-gas plate heat exchanger and the second water outlet pipe of the distributor are both connected to the spray absorption tower.

[0007] Preferably, the first outlet pipe of the diverter is connected to the sewage treatment plant.

[0008] Preferably, a water source heat pump is connected to the low-temperature water vapor outlet pipe of the spray absorption tower.

[0009] Preferably, the water and heat energy consuming component is a water tank or a boiler.

[0010] Preferably, the heat energy consuming component is an oven.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This wastewater discharge heat energy reduction device is equipped with a liquid-liquid plate heat exchanger, a gas-gas plate heat exchanger, gas heat energy consumables, liquid heat energy consumables, and a spray absorption tower. It can perform graded heat energy recovery and utilization of high-temperature wastewater and exhaust gas generated during the microfiber leather production process, forming a complete energy recycling system, significantly improving energy utilization efficiency and reducing the enterprise's production energy consumption costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] In the diagram: 1. Liquid-liquid plate heat exchanger; 101. Wastewater inlet pipe; 102. Wastewater outlet pipe; 103. Cold water inlet pipe; 104. Hot water outlet pipe; 2. Gas-gas plate heat exchanger; 201. Waste gas inlet pipe; 202. Waste gas outlet pipe; 203. Cold air inlet pipe; 204. Hot air outlet pipe; 3. Water and heat energy consumables; 4. Diverter; 5. First outlet pipe; 6. Second outlet pipe; 7. Wastewater treatment plant; 8. Gas and heat energy consumables; 9. Spray absorption tower; 10. Low-temperature water and gas outlet pipe; 11. Water source heat pump. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1 As shown, this utility model provides a technical solution: a wastewater discharge heat energy reduction device, including a liquid-liquid plate heat exchanger 1 and a gas-gas plate heat exchanger 2. The liquid-liquid plate heat exchanger 1 includes a wastewater inlet pipe 101, a wastewater outlet pipe 102, a cold water inlet pipe 103, a hot water outlet pipe 104, and a liquid-liquid heat exchange body. The gas-gas plate heat exchanger 2 includes a waste gas inlet pipe 201, a waste gas outlet pipe 202, a cold gas inlet pipe 203, a hot gas outlet pipe 204, and a gas-gas heat exchange body. The high-temperature wastewater (30-60℃)... Wastewater enters the liquid-liquid heat exchanger through the wastewater inlet pipe 101. After heat exchange through the liquid-liquid heat exchanger through the cold water inlet pipe 103, the cooled wastewater is discharged through the wastewater outlet pipe 102, and the heated cold water is discharged through the hot water outlet pipe 104. Similarly, high-temperature exhaust gas (80-120℃) enters the gas-gas heat exchanger through the exhaust gas inlet pipe 201. After heat exchange through the gas-gas heat exchanger through the cold air inlet pipe 203, the cooled exhaust gas is discharged through the exhaust gas outlet pipe 202, and the heated cold air is discharged through the hot air outlet pipe 204.

[0017] A water heat energy consumption component 3 is connected to the hot water outlet pipe 104 of the liquid-liquid plate heat exchanger 1. The water heat energy consumption component 3 includes, but is not limited to, a water tank or a boiler. When the heated cold water discharged from the hot water outlet pipe 104 enters the water heat energy consumption component 3, it can directly provide a heating water source for the water tank in the production process or preheat the boiler feed water, thereby reducing the consumption of fuel or electricity in traditional heating methods. A distributor 4 is connected to the wastewater outlet pipe 102 of the liquid-liquid plate heat exchanger 1. It has an adjustable flow valve structure inside, which can reasonably distribute the cooled wastewater through the first outlet pipe 5 and the second outlet pipe 6 according to the actual working conditions. The first outlet pipe 5 is connected to the sewage treatment plant 7, and the wastewater that meets the discharge standards is directly transported to the sewage treatment plant 7 for deep treatment. The second outlet pipe 6 transports another part of the wastewater to the spray absorption tower 9 for subsequent exhaust gas treatment processes.

[0018] The gas heat energy consumption component 8 connected to the hot gas outlet pipe 204 of the gas-to-gas plate heat exchanger 2 can be an oven or other equipment requiring heating. The heated gas enters the gas heat energy consumption component 8 through the hot gas outlet pipe 204, providing a heat source for drying materials inside the oven, replacing the original electric or steam heating method, and effectively recovering and utilizing the heat energy in the waste gas. The cooled waste gas discharged from the waste gas outlet pipe 202 of the gas-to-gas plate heat exchanger 2, together with the wastewater transported by the second water outlet pipe 6 of the distributor 4, enters the spray absorption tower 9. Inside the spray absorption tower 9, the wastewater is atomized into droplets by the spray device, and... The exhaust gas is fully in contact with the water in the wastewater, which can absorb the residual dimethylformamide in the exhaust gas, thus achieving "waste treatment with waste". Alternatively, the dimethylformamide in the exhaust gas and wastewater can be removed under the combined action of the agents. At the same time, some of the water vapor in the exhaust gas will be condensed and recovered. The low-temperature water vapor outlet pipe 10 of the spray absorption tower 9 will discharge the treated low-temperature water vapor. The water source heat pump 11 connected to the pipe can recover the low-grade heat energy in the low-temperature water vapor again and convert it into usable heat energy or cold energy, realizing the cascade utilization of energy and further improving the thermal energy consumption reduction efficiency of the entire device.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A waste heat energy consumption reduction device, comprising a liquid-liquid plate heat exchanger (1) and a gas-gas plate heat exchanger (2), characterized in that: The hot water outlet pipe (104) of the liquid-liquid plate heat exchanger (1) is connected to a water heat energy consumption component (3), and the wastewater outlet pipe (102) of the liquid-liquid plate heat exchanger (1) is connected to a flow divider (4). The hot gas outlet pipe (204) of the gas-to-gas plate heat exchanger (2) is connected to a gas heat energy consumption component (8). The exhaust gas outlet pipe (202) of the gas-to-gas plate heat exchanger (2) and the second water outlet pipe (6) of the distributor (4) are both connected to the spray absorption tower (9).

2. The waste heat energy consumption reduction device according to claim 1, characterized in that: The first outlet pipe (5) of the diverter (4) is connected to the sewage treatment station (7).

3. The waste heat energy consumption reduction device of claim 1, wherein: A water source heat pump (11) is connected to the low-temperature water vapor outlet pipe (10) of the spray absorption tower (9).

4. The waste heat energy consumption reduction device of claim 1, wherein: The water and heat energy consuming component (3) is a water tank or a boiler.

5. The waste heat energy consumption reduction device of claim 1, wherein: The heat energy consuming component (8) is an oven.

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