CN204806928U - Waste water waste heat recovery device - Google Patents

Abstract

The utility model provides a wastewater waste heat recovery system, which relates to the technical field of water heating. The technical problem to be solved is to provide a waste heat recovery device which can effectively utilize waste water waste heat to increase the initial temperature of cold water. The device includes: a waste water collection tank, a hot water tank, a hot water place, a trench collecting pipe, a metal heat exchanger, and a waste water overflow pipe, and is characterized in that a sump is arranged at the bottom of the waste water collection tank, and There is at least one overflow drain pipe at the bottom, and the upper end of the overflow drain pipe is located on the side of the waste water tank; a metal tube heat exchanger is installed in the middle and upper part of the waste water collection tank, and the upper end of the metal tube heat exchanger is connected to tap water, and the outlet is connected to the hot water tank A trench collecting pipe is provided in the hot water place, and an outlet is provided on the trench collecting pipe, and the outlet end is connected with the water inlet of the waste water collection tank. The device has the function of waste heat recovery, and the whole device realizes no power cycle, no operating cost, and achieves the purpose of preheating cold water, saving energy and reducing emissions.

Description

A waste heat recovery device for waste water

technical field

The utility model relates to the technical field of water heating, in particular to a waste water waste heat recovery device for bathing, industrial hot water and the like.

Background technique

Many bathrooms, enterprises, institutions, colleges, hotels, hospitals, etc. need hot water, especially in bathrooms, the warm water after use is directly discharged into the urban sewage pipe network, because heating the bath water usually needs to raise the water to 45°C However, the thermal energy consumption of the bath water during the bathing process is only about 10°C, and the temperature of the bathing wastewater is about 35°C, which is directly discharged into the urban sewage pipe network, which will waste a lot of heat energy and is not conducive to energy conservation and environmental protection.

Contents of the invention

In view of the above-mentioned defects in the prior art, the technical problem to be solved by the utility model is to provide a waste heat recovery device which can effectively utilize the waste heat of bathing wastewater to increase the initial temperature of cold water.

The problem to be solved by the utility model can be realized by the following scheme: a waste water waste heat recovery device, including a waste water collecting tank, a heating water tank, a hot water place, a trench collecting pipe, a metal heat exchanger, and a waste water overflow pipe , wherein the trench collecting pipe is located at the place where the hot water is used, and the metal heat exchanger and the waste water overflow pipe are located in the waste water collecting tank. The upper end of the overflow drain pipe is located on the side of the waste water tank. A metal tube heat exchanger is arranged in the middle and upper part of the waste water collection tank, the upper end of the metal tube heat exchanger is connected with running water, and the outlet is connected with the heating water tank. A trench collecting pipe is arranged in the hot water place, and an outlet is arranged on the trench collecting pipe, and the outlet end is connected with the water inlet of the waste water collecting tank.

A preferred example of the utility model: a sewage pump is arranged in the middle of the waste water overflow pipe.

The beneficial effects brought by the adoption of the utility model: the device has the function of waste heat recovery. First, before the tap water enters the heating water tank, the tap water is used to preheat the tap water to realize waste heat recovery. After the waste water is filled with the waste water tank, The cold water sinks to the sump and overflows by its own gravity. The whole device realizes no power cycle and no operating costs. When the waste water collection tank is lower than the sump, add a sewage pump to the waste water overflow pipe to Sewage discharge. To achieve the purpose of preheating cold water, energy saving and emission reduction.

Description of drawings:

Fig. 1 is a schematic structural diagram of a wastewater waste heat recovery device of the present invention.

Fig. 2 is a structural diagram of a waste water overflow pipe and a sewage pump of a waste heat recovery device of the present invention.

Among the figure 1, waste water collection tank, 2, hot water place, 3, heating equipment, 11, metal heat exchanger, 12, waste water overflow pipe, 13, sump, 14, sewage pump. 21, trench collection pipe, 22, use hot water point.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described:

As shown in Figure 1, a waste heat recovery device for waste water comprises a waste water collection tank 1, a water use place 2 and a heating water tank 3 for producing hot water, the bottom of the waste water collection tank 1 is provided with a sump 13, The sump 13 is at least 1 meter lower than the bottom of the waste water collection tank, and a waste water overflow pipe 12 is also provided in the waste water collection tank. One end of the waste water overflow pipe 12 extends into the bottom of the sump 13, and the other end is located in the waste water collection tank. 1. On the upper side of the side, a metal tube heat exchanger 11 is also arranged in the waste water collection tank. One end of the metal heat exchanger is connected to the tap water inlet, and the other end is connected to the hot water tank 3. The tap water passes through the metal heat exchanger in the waste water collection tank. Heat pipe enters heating water tank 3.

As shown in Figure 2, a sewage pump 14 is arranged in the middle of the waste water overflow pipe, which can discharge the sewage to above the level of the waste water collection tank.

Said water place 2 is equipped with a trench collecting pipe 21 and a water point 22. The trench collecting pipe 21 is lower than the water point 22. The water place can be a bathroom or an industrial hot water point, and the used hot water passes through the trench. The collection pipe collects and enters the waste water collection tank.

The heating water tank 3 may be any equipment for heating water in electric water heaters, boilers, solar water heaters and the like.

The working principle of the utility model is as follows: the waste water discharged by the hot water point 22 is collected by the trench collecting pipe 21 and enters the waste water collection tank 1, the waste water in the waste water collection tank 1 is stratified in the water tank, the cold water sinks, the hot water rises, and the waste water After the water collection tank is full, the cold water at the bottom is discharged through the waste water overflow pipe 12. Before the tap water enters the heating water tank, the heat in the waste water collection tank is replaced by a metal heat exchanger to preheat the tap water. Raise the base water temperature of the tap water.

Claims (4)

1. a waste water heat recovering equipment, comprise waste water header tank (1), with water place (2) and heat water tank (3) for hot water preparing, feature is that described waste water header tank (1) bottom is provided with catch pit (13), catch pit (13) is at least lower than bottom waste water header tank 1 meter, waste water outflow pipe (12) is also provided with in described waste water header tank, the bottom of catch pit (13) is stretched in waste water outflow pipe (12) one end, the other end is positioned at top position, waste water header tank (1) side, a metal tube heat exchanger (11) is also established in described waste water header tank, metallic recuperator one termination running water water inlet, another termination water heating case (3), the metallic heat exchanging tube of running water in waste water header tank enters and heats water tank (3).

2. a kind of waste water heat recovering equipment according to claim 1, is characterized in that establishing a sewage pump (14) in the middle of described waste water outflow pipe (12), sewage can be drained into more than waste water header tank plane.

3. a kind of waste water heat recovering equipment according to claim 1, it is characterized in that described use water place (2), inside establish trench collecting pipe (21) and with water spot (22), trench collecting pipe (21) is lower than with water spot (22), and spent hot water enters waste water header tank after trench collecting pipe is collected.

4. a kind of waste water heat recovering equipment according to claim 1, it is characterized in that described heating water tank (3), can be the equipment of any one heating water in electric heater, boiler, solar water heater etc.