CN202470815U - Heat energy recovery device - Google Patents

Abstract

The utility model relates to a heat energy recovery device which comprises a waste hot water tank, a heat exchanger, a water source heat pump, a hot water box and a waste water discharge hole, wherein the waste hot water tank is internally provided with the heat exchanger; one end of the heat exchanger is respectively connected with the water source heat pump and the hot water box by a tee joint; the water source heat pump is connected with the hot water box; and the waste water discharge hole is connected with the waste hot water tank. The heat energy recovery device avoids the difficulty of'filth blockage' and equipment maintenance. The tap water (new water) flows through a pipe arranged in the heat exchanger, and waste water flows through a pipe arranged outside the heat exchanger, so that the heat exchanger can be cleaned at any time when the water tank is cleaned at ordinary times.

Description

A heat recovery device

technical field

The utility model relates to a heat energy recovery device, in particular to a device for extracting and recirculating the heat energy of waste hot water in a bathing center (or industrial waste heat pool), which belongs to the use of heat exchangers, water source heat pumps and other devices to replace and extract waste water pools. The heat energy in the water, and the heat energy recovery and recycling technology for heating new water.

Background technique

Because the wastewater (or industrial wastewater pool) in the bathing center contains a lot of slag and some unclean substances, it has brought many technical obstacles to the recovery of heat energy. Now the wastewater in the bath (or industrial wastewater pool) , People have to completely let go of the hot water in the pool, and then re-use energy to heat new water and inject it into the pool again. During this period, a large amount of heat energy is discharged in vain, resulting in a waste of energy.

In this regard, some technical solutions try to use heat exchangers to recover part of the heat energy during the waste water discharge process, and then build a waste water pool to store the waste water, and then extract the heat energy from it with a water source heat pump. However, the waste water in the waste water pool can easily cause "dirty blockage", not only the operation of the system is unstable, but also it is easy to damage the equipment. In addition, the investment in building waste water storage pools is relatively large, and many bathing centers simply have no place to build them.

So far, there is still no technical device for heat recovery suitable for all waste water pools that operates reliably.

Utility model content

The technical problem to be solved by the utility model is to provide a thermal energy recovery device which is reliable in operation and suitable for all waste heat pools.

The technical scheme that the utility model solves the problems of the technologies described above is as follows:

A heat energy recovery device, comprising a waste heat pool, a heat exchanger, a water source heat pump, a hot water tank, and a waste water discharge port; a heat exchanger is arranged in the waste heat pool, and one end of the heat exchanger is respectively connected to the The water source heat pump is connected to the hot water tank, the water source heat pump is connected to the hot water tank, and the waste water discharge port is connected to the waste water pool.

The tee is a pipe fitting or a pipe connector. Also known as pipe fittings tee or tee fittings, tee joints are used at the branch pipes of the main pipeline. The tees are divided into equal diameter and different diameters. The pipe ends of the equal diameter tees are all the same size; the main pipe pipes of the different diameter tees are the same size, and the pipe pipes of the branch pipes are smaller than the pipe pipes of the main pipe.

The beneficial effects of the utility model are:

1. There is no need to build a waste water storage pool, the raw water pool is used as a waste water storage pool, which reduces the investment in equipment, makes the equipment more adaptable, and makes it applicable to the heat recovery of all waste water pools.

2. Avoid the difficulty of "dirty blockage" and equipment maintenance. The tap water (fresh water) flows into the pipe of the heat exchanger, and the waste water flows out of the pipe of the heat exchanger. The heat exchanger can be cleaned at any time in the cleaning pool.

3. Since the extraction of heat energy is carried out in the waste water pool, the temperature of the waste water during the flow process is avoided, and the flow rate is large and small, so that the equipment runs smoothly.

4. The system has a high utilization rate of waste heat. The energy consumed by the system to heat the same pool of water is only 1/14 of the original system.

Now assume that the set temperature of the hot water tank is 50°C, the temperature of the tap water is 15°C, the temperature of the water in the waste water tank is 45°C, and the mass of the water in the water tank and the pool is 10 tons respectively.

The heat energy required by the original system to heat 10 tons of water is (50-15)*10000=350000 kcal.

The heat recovery of this system is divided into two parts. First, the heat energy of the waste water is replaced by a heat exchanger. Calculated according to the heat transfer of a temperature difference of 5°C, the water temperature in the waste water pool can be reduced from 45°C to 20°C, and the same volume can be reduced. The temperature of the water in the hot water tank rises from 15°C to 40°C. This part is only the process of energy replacement, and there is no energy consumption.

Then the water source heat pump extracts the heat energy of the 20°C waste water, so that the water in the waste heat pool drops to 10°C, and at the same time, the water in the water tank is heated to 50°C by the heat pump. In this process, the lowest energy efficiency ratio of the heat pump can reach 1:4. Now calculate according to 1:4. At this time, the energy required by the heat pump is (20-10)*10000/4=25000. So 25000/350000=1/14 . That is, the energy efficiency ratio of this thermal energy extraction is 1:14.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, the thermal energy recovery device further includes an electric control system, and the electric control system is connected to the waste water discharge port.

Further, the thermal energy recovery device further includes a hot water discharge port, one end of the hot water discharge port is connected to the hot water tank, and the other end of the hot water discharge port is connected to the electric control system.

Further, the heat energy recovery device also includes a tap water replenishment control valve, one end of the tap water replenishment control valve is connected to the electric control system, and the other end of the tap water replenishment control valve is connected to the other end of the heat exchanger. connect.

Further, a circulating water pump at the hot water end of the heat pump is also connected between the water source heat pump and the hot water tank.

Further, the heat energy recovery device also includes a circulating water pump at the water source end of the heat pump and a check valve, one end of the heat exchanger is connected to the water source heat pump through the circulating water pump at the water source end of the heat pump, and the other end of the heat exchanger It is connected with the water source heat pump through the check valve.

Further, the heat exchanger is in the shape of a plate or a tube.

The further beneficial effect of adopting the above is that since the heat exchanger is in the shape of a plate or a tube, it only occupies a small space in the bath, and it has no effect on daily bathing.

The working principle of the utility model is as follows:

A heat exchanger is placed in the waste heat pool, and the inlet and outlet pipes of the heat exchanger are connected with the water source heat pump and the hot water tank through a tee. Under the control of the electronic control system, the tap water enters the heat exchanger in the waste heat pool to exchange heat and then enters the hot water tank. When the water temperature in the waste heat pool drops to a certain temperature (such as 20°C), at this time, the water in the hot water tank The amount of water has reached the requirements of the next round of bath water. The tap water inlet is automatically shut off. The heat exchanger in the pool and the circulation system of the water source heat pump are automatically turned on. The water source heat pump continues to extract the heat energy in the waste water pool, so that when the water temperature in the waste water pool reaches below 10°C (at the same time, when the water temperature in the hot water tank reaches the preset temperature), the system will automatically shut down, completing the whole process of heat energy extraction. The waste water below 10°C is discharged from the waste water outlet, and the hot water in the hot water tank is re-injected into the pool for a new round of bathing.

Description of drawings

Fig. 1 is the structural representation of the utility model heat recovery device;

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Wastewater discharge port, 2. Waste water pool, 3. Heat exchanger, 4. Circulating water pump at water source end of heat pump, 5. Check valve, 6. Water source heat pump, 7. Circulating water pump at hot water end of heat pump, 8. Hot water discharge Mouth, 9, hot water tank, 10, tap water replenishment control valve, 11, electric control system.

Detailed ways

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

A heat energy recovery device, as shown in Figure 1, comprises a waste heat pool 2, a heat exchanger 3, a water source heat pump 6, a hot water tank 9, and a waste water discharge port 1; the waste heat pool 2 is provided with a heat exchanger 3, so that One end of the heat exchanger 3 is respectively connected to the water source heat pump 6 and the hot water tank 9 through a tee, the water source heat pump 6 is connected to the hot water tank 9, and the waste water discharge port 1 is connected to the waste heat Pool 2 is connected.

The heat energy recovery device also includes an electric control system 11 connected to the waste water discharge port 1 .

The heat recovery device also includes a hot water discharge port 8, one end of the hot water discharge port 8 is connected to the hot water tank 9, and the other end of the hot water discharge port 8 is connected to the electric control system 11. connect.

The heat recovery device also includes a tap water replenishment control valve 10, one end of the tap water replenishment control valve 10 is connected to the electric control system 11, and the other end of the tap water replenishment control valve 10 is connected to the heat exchanger 3 The other end is connected.

A circulating water pump 7 at the hot water end of the heat pump is also connected between the water source heat pump 6 and the hot water tank 9 .

The heat energy recovery device also includes a heat pump water source circulating water pump 4 and a check valve 5, one end of the heat exchanger 3 is connected to the water source heat pump 6 through the heat pump water source circulating water pump 4, and the heat exchanger The other end of 3 is connected with the water source heat pump 6 through the check valve 5 .

Put a heat exchanger 3 in the waste heat pool 2, tap water flows inside the heat exchanger 3, waste water flows outside the heat exchanger, and the tap water replenishment control valve 10 is opened under the control of the electric control system 11, and the tap water is controlled by tap water replenishment The valve 10 enters the heat exchanger 3, and enters the hot water tank 9 after exchanging heat with the hot water in the waste heat pool 2. When the water temperature in the waste heat pool 2 drops to a certain temperature (such as 20°C, the hot water tank 9 has reached the water volume in the waste heat pool 2), the tap water replenishment control valve 10 is automatically closed; under the control of the electronic control system 11, the system turns on the water source heat pump 6, and continues to extract the heat energy in the waste heat pool 2, so that the waste heat pool 2 The water temperature in the waste water tank continues to drop, and the water temperature in the hot water tank 9 continues to rise. When the water temperature in the waste heat pool 2 drops to a set temperature (such as 10°C), the water temperature in the hot water tank 9 rises to a set temperature (such as 50°C), the circulating water pump 4 and the check valve 5 at the water source end of the heat pump are automatically closed, thus completing the whole process of extracting heat energy.

After the heat energy is extracted, the electronic control system 11 opens the waste water discharge port 1 of the waste heat pool 2, discharges the waste water in the waste heat pool 2, and then manually cleans the waste heat pool 2 and the heat exchanger 3 in the pool. After the cleaning work is completed, close the waste heat The waste water discharge port 1 in the pool 2, and open the hot water discharge port 8, all put the hot water in the hot water tank 9 in the waste water pool 2, use in order to prepare for a new round of bathing. At this time, the system has completed a whole process of heat energy recycling.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (7)

1. a heat-energy recovering apparatus is characterized in that: comprise used heat pond, heat exchanger, water resource heat pump, boiler and discharge of wastewater mouth; Said used heat is provided with heat exchanger in the pond, and an end of said heat exchanger is connected with said water resource heat pump, boiler respectively through threeway, and said water resource heat pump is connected with said boiler, and said discharge of wastewater mouth is connected with said used heat pond.

2. heat-energy recovering apparatus according to claim 1 is characterized in that: said heat-energy recovering apparatus also comprises electric-control system, and said electric-control system is connected with said discharge of wastewater mouth.

3. heat-energy recovering apparatus according to claim 2; It is characterized in that: said heat-energy recovering apparatus also comprises hot water emission's mouth; One end of said hot water emission's mouth is connected with said boiler, and the other end of said hot water emission's mouth is connected with said electric-control system.

4. heat-energy recovering apparatus according to claim 2; It is characterized in that: said heat-energy recovering apparatus also comprises running water moisturizing by-pass valve control; One end of said running water moisturizing by-pass valve control is connected with said electric-control system, and the other end of said running water moisturizing by-pass valve control is connected with the other end of said heat exchanger.

5. heat-energy recovering apparatus according to claim 1 is characterized in that: also be connected with heat-pump hot-water end water circulating pump between said water resource heat pump and the said boiler.

6. heat-energy recovering apparatus according to claim 1; It is characterized in that: said heat-energy recovering apparatus also comprises heat pump water source end water circulating pump and check-valves; One end of said heat exchanger is connected with said water resource heat pump through said heat pump water source end water circulating pump, and the other end of said heat exchanger is connected with said water resource heat pump through said check-valves.

7. according to each described heat-energy recovering apparatus of claim 1 to 6, it is characterized in that: said heat exchanger is tabular or tubulose.

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