Heat recovery box

Abstract

The utility model discloses a heat recovery box in the technical field of waste heat recovery devices, and the heat recovery box comprises a supporting frame, multiple layers of heat exchange assemblies are sequentially and fixedly arranged on the supporting frame from top to bottom in the vertical direction, each layer of heat exchange assembly comprises multiple heat exchange grooves which are sequentially and fixedly connected, and communicating openings for waste water circulation are formed in the connecting positions of the adjacent heat exchange grooves; a water drainage pipe is connected between the heat exchange groove located at the tail end of the upper-layer heat exchange assembly and the heat exchange groove located at the head end of the lower-layer heat exchange assembly. Heat exchange pipes are laid on each layer of heat exchange assembly according to the trend of the multiple heat exchange grooves, the tail ends of the heat exchange pipes of the upper layer of heat exchange assembly and the head ends of the heat exchange pipes of the lower layer of heat exchange assembly are connected with connecting pipes, each heat exchange groove is further provided with flow deflectors located at the two ends of the heat exchange pipes, and the flow deflectors are provided with multiple flow guide holes. According to the scheme, the multiple layers of heat exchange assemblies are arranged in the height direction for heat exchange, so that the overall length is not too long, and the occupied area is small.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery devices, and particularly relates to a heat recovery box. Background Technique

[0002] Waste heat refers to the sensible heat and latent heat that are not reasonably utilized in the original design of energy-consuming devices in operating industrial enterprises due to limitations such as history, technology, and concepts. It includes high-temperature waste gas waste heat, cooling medium waste heat, waste steam and waste water waste heat, high-temperature product and slag waste heat, chemical reaction waste heat, combustible waste gas, waste liquid and waste residue waste heat, etc.

[0003] With the improvement of people's living standards, the use of hot water is becoming more and more extensive. For example, water for washing vegetables in the family kitchen, washing hands and feet in the bathroom, showering, washing machines, bathtubs, etc. In actual use, in order to meet the usage requirements, a large amount of energy is required to heat the water to the required temperature, but the actual effective use of thermal energy is less. For example, when people take a bath, taking Guizhou area as an example, the temperature of tap water is 2 - 5°C in winter and 15 - 19°C in summer, while the temperature of bath water is between 40 - 44°C, and the actual heat utilization rate of shower water is only 30%. More thermal energy is discharged with domestic wastewater, wasting a large amount of energy and increasing the greenhouse effect.

[0004] Previously, the inventor applied for a heat recovery plate (application number: 2021231059844), which includes a heat absorption plate and heat absorption tubes arranged inside the heat absorption plate. When the waste hot water passes through the heat absorption plate, the heat is indirectly transferred to the heat absorption tubes. However, this indirect heat transfer method significantly reduces the heat transfer efficiency; moreover, when the amount of waste hot water is large, the waste hot water quickly flows on the heat absorption plate and discharges outward, resulting in a large amount of unexchanged waste hot water being wasted and reducing the heat exchange efficiency.

[0005] Therefore, the inventor provided a heat exchange tank, referring to Figure 1 , this heat exchange tank includes a tank body, and heat exchange tubes are arranged inside the water tank. The heat exchange tubes are provided with a water inlet and a water outlet. Waste water inlets and waste water outlets are also arranged on both sides of the tank body. The heat exchange tubes are located between the waste water inlets and the waste water outlets; the tank body is also fixedly provided with a first guide vane and a second guide vane that isolate the waste water inlets and the waste water outlets from the heat exchange tubes. Both the first guide vane and the second guide vane are provided with multiple groups of guide hole groups covering the heat exchange tubes, and each guide hole group includes multiple spaced guide holes. The multiple guide holes of the first guide vane play a role in diverting the waste hot water, making the waste hot water evenly distributed, and the waste hot water can cover the entire heat exchange tube, thereby increasing the heat exchange area. The multiple guide holes of the second guide vane can delay the speed of the waste hot water discharging outward, thereby prolonging the heat exchange time between the waste hot water and the heat exchange tubes.

[0006] However, in actual application of the heat exchange tank, it is found that when the residual temperature of the wastewater is too high, the length of the heat exchange tube must be extended to prolong the heat exchange time and improve the heat exchange effect. Extending the length of the heat exchange tube will inevitably require extending the length of the heat exchange tank. For some specific installation sites, such as when the installation length is insufficient, a longer heat exchange tank cannot meet the installation requirements. Utility Model Content

[0007] The purpose of the present utility model is to provide a heat recovery tank, so as to provide a heat recovery tank with a multi-layer heat exchange structure to meet the installation requirements of specific installation sites.

[0008] To achieve the above purpose, the present utility model provides the following technical solutions:

[0009] A heat recovery tank includes a support frame. The support frame is fixedly provided with multiple layers of heat exchange components from top to bottom in the vertical direction. Each layer of heat exchange component includes a plurality of heat exchange tanks fixedly connected in sequence. A communication port for the wastewater to flow through is provided at the connection of adjacent heat exchange tanks; a drain pipe is connected between the heat exchange tank at the end of the upper layer of heat exchange components and the heat exchange tank at the beginning of the lower layer of heat exchange components; each layer of heat exchange component is provided with heat exchange tubes laid along the direction of the plurality of heat exchange tanks. A connecting pipe is connected between the end of the heat exchange tube of the upper layer of heat exchange components and the beginning of the heat exchange tube of the lower layer of heat exchange components. Each heat exchange tank is also provided with guide vanes at both ends of the heat exchange tube, and the guide vanes are provided with a plurality of guide holes.

[0010] Working principle and beneficial effects of the present utility model:

[0011] In this solution, the waste hot water is introduced into the heat exchange tank at the beginning of the top heat exchange component, and tap water is introduced into the heat exchange tube. The waste hot water flows through the plurality of heat exchange tanks of the top heat exchange component in sequence through the communication port, and then enters the heat exchange tank at the beginning of the lower layer of heat exchange components through the drain pipe, and then flows through the plurality of heat exchange tanks of this layer in sequence through the communication port. The water to be heated in the heat exchange tube absorbs the heat energy of the waste hot water for heat exchange. At the same time, the heat conduction holes on the left guide vane of each heat exchange tank play a role in diverting the waste hot water, making the waste hot water evenly distributed, and the waste hot water can cover the entire heat exchange tube, thereby increasing the heat exchange area. The heat conduction holes on the right guide vane can delay the speed of the waste hot water discharging outwards, thereby prolonging the heat exchange time between the waste hot water and the heat exchange tube. Therefore, this solution can improve the heat exchange efficiency of tap water, achieve full heat energy recovery, high efficiency, and energy saving.

[0012] This solution sets multiple layers of heat exchange components in the height direction for heat exchange, making the overall length not too long and occupying a small area, so as to meet the installation requirements of some specific installation sites; moreover, the length of the heat exchange tube can be set longer to achieve a better heat exchange effect.

[0013] Preferably, each layer of heat exchange assembly includes two heat exchange tanks fixedly connected in sequence at the head and the tail.

[0014] Preferably, the two heat exchange tanks of each layer of heat exchange assembly are both inclined downward, and the directions in which the two heat exchange tanks incline downward are opposite. This optimized solution can guide the flow direction of the waste hot water to prevent the waste hot water from accumulating in the heat exchange tank.

[0015] Preferably, the number of layers of the heat exchange assembly is 2 to 10 layers. Increasing the number of layers of the heat exchange assembly can achieve a better heat exchange effect.

[0016] Preferably, the heat exchange tube includes a water inlet and a water outlet, and movable nuts are coaxially rotatably connected to the water inlet and the water outlet. An external water pipe is provided with an external thread nut for cooperating with the movable nut, and the external thread nut is screwed into the movable nut to achieve quick installation.

[0017] Preferably, the heat exchange tank is provided with a heat insulation layer. The heat insulation layer can slow down the heat transfer speed to the outside world and play a heat preservation role.

[0018] Preferably, the heat exchange tank is provided with a fixing bracket, and the heat exchange tube is connected to the fixing bracket and is distributed in a serpentine shape. The serpentine shape can increase the heat exchange area with the waste hot water, improve the heat exchange efficiency, fix the serpentine heat exchange tube as a whole, and facilitate the removal and cleaning of the heat exchange tube and the bracket together in the later stage. Moreover, the heat exchange tube will not be deformed, there is no dead angle in cleaning, and the high-efficiency heat exchange efficiency can be maintained for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a heat exchange tank in the prior art;

[0020] Figure 2 is a schematic structural diagram of a heat recovery box of the present utility model;

[0021] Figure 3 is Figure 2 side view. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will be further described in detail through specific embodiments:

[0023] The reference numerals in the accompanying drawings of the specification include: support frame 1, heat exchange tube 2, guide vane 3, heat exchange tank 4, communication port 5, drain pipe 6, connecting pipe 7.

[0024] In the following statements, the orientation words such as "left", "right", "up", and "down" are based on the orientation shown in the figure. In practice, if the corresponding structure makes the same-direction change based on the orientation and the relative position remains unchanged, it does not affect the implementation of the solution.

[0025] Embodiment: As Figure 2 and Figure 3As shown, a heat recovery box includes a support frame 1, on which three layers of heat exchange components are fixedly mounted from top to bottom. Each layer of heat exchange components includes two heat exchange slots 4 fixed in sequence. The connection between adjacent heat exchange slots 4 is provided with a connection port 5 for wastewater circulation. A drain pipe 6 is fixedly connected between the heat exchange slots 4 at the end of the heat exchange component of the previous layer and the heat exchange slots 4 at the beginning of the heat exchange component of the next layer. Each heat exchange component layer has a heat exchange tube 2, which is laid out in the direction of the two heat exchange slots 4 of each heat exchange component layer. A connecting pipe 7 is fixedly connected between the end of the heat exchange tube 2 of the heat exchange component of the previous layer and the beginning of the heat exchange tube 2 of the heat exchange component of the next layer. Each heat exchange slot 4 is also fixed with a guide plate 3 at both ends of the heat exchange tube 2, which has multiple diversion holes.

[0026] In this solution, wastewater is introduced from the heat exchange tank 4 at the head end of the first layer, and tap water is introduced into the top heat exchange tube 2. It then flows through the connecting pipe 7 into the heat exchange tube 2 of the next layer, with tap water flowing from top to bottom. The wastewater then flows through the connecting port 5 into the second heat exchange tank 4 on the top layer, then through the drain pipe 6 into the heat exchange tank 4 at the head end of the second layer. It then flows through the connecting port 5 into another heat exchange tank 4 on the second layer, and so on, before being discharged through the drain pipe 6 on the third layer.

[0027] The water to be heated within the heat exchange tubes 2 absorbs the heat energy of the waste water to exchange heat. Simultaneously, the heat conduction holes on the left guide plate 3 of each heat exchange slot 4 divert the waste water, distributing it evenly so that it covers the entire heat exchange tube 2, thereby increasing the heat exchange area. The heat conduction holes on the right guide plate 3 slow the rate at which the waste water is discharged, thereby extending the heat exchange time between the waste water and the heat exchange tubes 2. Therefore, this solution improves the heat exchange efficiency of tap water, achieving full heat recovery, high efficiency, and energy conservation.

[0028] This solution sets up three layers of heat exchange components in the height direction for heat exchange, so that the overall length is not too long and the footprint is small, thus adapting to the installation requirements of some specific installation sites; and the length of the heat exchange tube 2 can be set longer to achieve better heat exchange effect.

[0029] Preferably, baffles are fixedly provided around the bracket 1 .

[0030] The standard parts used in this utility model can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

Claims

1. A heat recovery box, comprising a support frame, characterized in that: The support frame is fixedly provided with multiple heat exchange components from top to bottom in the vertical direction. Each heat exchange component includes a plurality of heat exchange tanks fixedly connected in sequence. A communication port for the waste water to flow through is provided at the connection between adjacent heat exchange tanks; a drain pipe is connected between the heat exchange tank at the end of the upper-layer heat exchange component and the heat exchange tank at the beginning of the lower-layer heat exchange component; heat exchange pipes are laid along the trend of the plurality of heat exchange tanks in each heat exchange component. A connecting pipe is connected between the end of the heat exchange pipe of the upper-layer heat exchange component and the beginning of the heat exchange pipe of the lower-layer heat exchange component. Each heat exchange tank is also provided with guide vanes at both ends of the heat exchange pipe, and the guide vanes are provided with a plurality of guide holes.

2. The heat recovery box according to claim 1, wherein: Each heat exchange component includes two heat exchange tanks fixedly connected end to end.

3. The heat recovery box according to claim 2, characterized in that: The two heat exchange tanks of each heat exchange component are both inclined downward, and the downward inclination directions of the two heat exchange tanks are opposite.

4. The heat recovery box according to claim 3, characterized in that: The number of layers of the heat exchange components is 2 to 10 layers.

5. A heat recovery box according to claim 4, characterized in that: The heat exchange pipe includes a water inlet and a water outlet, and movable nuts are coaxially rotatably connected to the water inlet and the water outlet.

6. The heat recovery box according to claim 5, wherein: The heat exchange tank is provided with a heat preservation layer.

7. The heat recovery box according to claim 6, wherein: The heat exchange tank is provided with a fixed bracket, and the heat exchange pipe is connected to the fixed bracket and is distributed in a serpentine shape.

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