High-temperature sewage heat energy extraction system

Abstract

The utility model relates to the technical field of heat energy extraction, in particular to a high-temperature sewage heat energy extraction system which comprises a heat pump unit, a sewage supply pipeline, a closed cooling tower, a water inlet pipe and a water outlet pipe, high-temperature sewage in the sewage supply pipeline enters an evaporator of the heat pump unit to release heat, and the water inlet pipe is communicated with a water inlet of a condenser of the heat pump unit. A water outlet of the condenser is communicated with a water outlet pipe, and the sewage supply pipeline is communicated with the closed cooling tower through a water distribution pipeline. High-temperature sewage in the sewage supply pipeline enters the evaporator of the heat pump unit, heat is transferred to a refrigerant in the evaporator, the refrigerant enters the condenser after absorbing heat, the refrigerant releases heat in the condenser, water in the condenser is heated, and the heated water is discharged through the water outlet pipe and put into process use.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat energy extraction, and particularly relates to a high-temperature sewage heat energy extraction system. BACKGROUND

[0002] In the traditional wine-making process, a large amount of medium-temperature sewage is inevitably produced in the process from raw material moistening, fermentation, distillation to subsequent processing links. These sewage includes some high-temperature sewage with a temperature usually maintained at about 50℃, which contains considerable heat energy.

[0003] Under the current treatment mode, the medium-temperature sewage is transported to a special sewage treatment plant in the factory area. In the sewage treatment plant, the main treatment goal is to achieve the harmlessness of the sewage, and through a series of physical, chemical and biological treatment methods, harmful substances, organic matter, suspended solids and the like in the sewage are removed so as to reach the discharge standard. However, in this process, the heat energy carried by the sewage is not effectively utilized.

[0004] After being treated, the medium-temperature sewage is directly discharged into the natural environment, whether into rivers, lakes or underground drainage systems. This conventional practice, although meeting the requirement of harmlessness of the sewage in environmental protection, ignores the value of the heat energy contained in the sewage. For a wine-making enterprise, this means that a large amount of energy is inadvertently wasted. From the perspective of energy utilization, this waste of heat energy is very regrettable, because in the wine-making production process, energy consumption is an important part of the cost structure, and the wasted heat energy can be effectively utilized in the enterprise or other related fields, thereby improving the overall energy utilization efficiency and reducing the dependence on external energy supply. SUMMARY

[0005] The utility model aims at providing a high-temperature sewage heat energy extraction system, solving the problem that the heat energy in the high-temperature sewage produced in the wine-making process is not well utilized in the prior art.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] A high-temperature sewage heat energy extraction system, comprising a heat pump unit, a sewage water supply pipeline, a closed cooling tower, a water inlet pipe and a water outlet pipe, high-temperature sewage in the sewage water supply pipeline enters an evaporator of the heat pump unit to release heat, the water inlet pipe is in communication with a water inlet of a condenser of the heat pump unit, a water outlet of the condenser is in communication with the water outlet pipe, and the sewage water supply pipeline is in communication with the closed cooling tower through a water distribution pipeline.

[0008] Further technical scheme is that the sewage water supply pipeline is in communication with a water inlet of the evaporator, and a first drain pipe is connected to a water outlet of the evaporator.

[0009] Further, the sewage supply pipeline is provided with a three-way valve, and the water distribution pipeline is connected with the sewage supply pipeline through the three-way valve.

[0010] Further, the water outlet pipe is connected with the water inlet cavity at the end away from the condenser.

[0011] Further, the water inlet cavity and the water storage cavity are arranged in the water storage tank in an up-down manner, the bottom of the water inlet cavity is provided with a filter channel communicated with the water storage cavity at the connection with the cavity wall, a filter core is arranged in the filter channel, and the water outlet pipe is connected with the water inlet cavity at the end away from the condenser.

[0012] Further, the water storage tank is provided with a mounting port communicated with the filter channel at the side, the outer side of the water storage tank is provided with a closure plate for closing the mounting port, and the filter core is connected with the inner side of the closure plate.

[0013] Further, the closure plate is fixed to the outer side of the water storage tank through screws, a sealing ring is arranged at the abutting position of the closure plate and the water storage tank, and the outer side of the closure plate is provided with a handle.

[0014] Further, the closed cooling tower is connected with a second drain pipe.

[0015] Further, the water inlet pipe is provided with a water pump.

[0016] Compared with the prior art, the high-temperature sewage in the sewage supply pipeline enters the evaporator of the heat pump unit, heat is transferred to the refrigerant in the evaporator, the refrigerant is heated and enters the condenser, the refrigerant releases heat in the condenser, the water in the condenser is heated, and the heated water is discharged through the water outlet pipe and used in the process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole frame schematic view of the high-temperature sewage heat energy extraction system.

[0018] Figure 2 It is a water storage tank schematic view of the high-temperature sewage heat energy extraction system.

[0019] Figure icon: 1-heat pump unit, 2-waste water supply pipeline, 4-closed cooling tower, 8-water distribution pipeline, 10-three-way valve, 13-water inlet pipe, 14-water outlet pipe, 15-water storage tank, 16-water inlet cavity, 17-water storage cavity, 18-filter channel, 19-filter core, 20-mounting port, 21-closing plate, 22-water tank outlet pipe, 23-second drain pipe, 24-circulating water pump, 25-pull handle. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail by combining with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0021] Figure 1 、 2 As shown in the utility model embodiment.

[0022] Example 1:

[0023] A high-temperature waste water heat extraction system, comprising a heat pump unit 1, a waste water supply pipeline 2, a closed cooling tower 4, a water inlet pipe 13 and a water outlet pipe 14, the high-temperature waste water in the waste water supply pipeline 2 enters the evaporator of the heat pump unit 1 to release heat, the water inlet pipe 13 is connected with the water inlet of the condenser of the heat pump unit 1, the water outlet of the condenser is connected with the water outlet pipe 14, and the waste water supply pipeline 2 is connected with the closed cooling tower 4 through the water distribution pipeline 8.

[0024] The temperature of the high-temperature waste water is about 50 DEG C, and after heat release through the evaporator, it is reduced to about 35 DEG C. The condenser heats the normal temperature water (20 DEG C in summer and 10 DEG C in winter) to about 80 DEG C.

[0025] The waste water supply pipeline 2 is connected with the water inlet of the evaporator, and the water outlet of the evaporator is connected with a first drain pipe 9.

[0026] A three-way valve 10 is installed on the waste water supply pipeline 2, and the water distribution pipeline 8 is connected with the waste water supply pipeline 2 through the three-way valve 10. The three-way valve 10 can connect the water distribution pipeline 8 with the waste water supply pipeline 2 and control the flow entering the water distribution pipeline 8.

[0027] The water outlet pipe 14 is connected with a water storage tank 15 at one end away from the condenser; the water storage tank 15 is provided with a water tank outlet pipe 22, and the water tank outlet pipe 22 is used for connecting a grain moistening process pipeline. By arranging the water storage tank 15, the heated tap water can be stored, and the temperature loss of the heated water can be avoided.

[0028] The water storage tank 15 is provided with a water inlet cavity 16 and a water storage cavity 17 in the up-down direction, the cavity bottom of the water inlet cavity 16 is provided with a filter channel 18 communicated with the water storage cavity 17 at the joint with the cavity wall, the filter channel 18 is provided with a filter core 19, and the water outlet pipe 14 is communicated with the water inlet cavity 16 away from the condenser; the water inlet cavity 16 is provided with two or more than two. The water in the water inlet pipe 13 is heated by the condenser, enters the water inlet cavity 16 through the water outlet pipe 14, enters the water storage cavity 17 through the filter channel 18 for storage, and is filtered by the filter core 19 when passing through the filter channel 18. The water in the water inlet pipe 13 is used as water after other processes, and some fine impurities inevitably exist in the water. These impurities will deposit in the water storage tank 15 due to the static state after entering the water storage tank 15, so that the water storage tank 15 needs to be cleaned frequently. In order to avoid this situation, the filter core 19 is used to filter out these impurities, so as to reduce the impurities entering the water storage cavity 17, and further reduce the cleaning frequency of the water storage cavity 17.

[0029] The side of the water storage tank 15 is provided with a mounting port 20 communicated with the filter channel 18, the outer side of the water storage tank 15 is provided with a sealing plate 21 used for closing the mounting port 20, and the filter core 19 is connected with the inner side of the sealing plate 21. By arranging the mounting port 20, the filter core 19 can be conveniently cleaned. By arranging the sealing plate 21, the mounting port 20 can be conveniently sealed.

[0030] The sealing plate 21 is fixed to the outer side of the water storage tank 15 by screws, the sealing plate 21 is provided with a sealing ring at the joint with the water storage tank 15, and the outer side of the sealing plate 21 is provided with a handle 25. By arranging the screws, the sealing plate 21 can be stably arranged on the side of the water storage tank 15. By arranging the sealing ring, water leakage can be avoided at the joint of the sealing plate 21 and the water storage tank 15. By arranging the handle 25, the sealing plate 21 can be conveniently disassembled.

[0031] The closed cooling tower 4 is connected with a second drain pipe 23.

[0032] The water inlet pipe 13 is provided with a water pump 24.

[0033] By setting the second drain pipe 23, the sewage after the closed cooling tower 4 is cooled. The closed cooling tower 4 is a device that cools the process fluid (high-temperature sewage) in a closed circulation system. It is mainly composed of a shell, an internal heat exchanger, a fan, a spraying system, a water collecting tank and an internal water pump, etc. Shell: Generally made of glass fiber reinforced plastic, stainless steel or galvanized steel plate, etc. It plays a protective role for the internal components and prevents external environmental interference. Its shape is diverse, and the common ones are square and round. Internal heat exchanger: It is the core component of the closed cooling tower 4, which is used to transfer the heat of the internally closed circulating hot fluid (high-temperature sewage) out. It is usually made of copper or stainless steel pipe bundle, wrapped with fins outside to increase the heat exchange area. The hot fluid flows in the pipe, and the heat is exchanged with the outside cooling medium through the pipe wall and the fins. Fan: The fan is installed at the top or side of the cooling tower, which provides power for air flow. Through the operation of the fan, air is forced to flow through the internal heat exchanger, taking away heat, thereby enhancing the cooling effect. The fan types are axial and centrifugal, the former has large air volume and small air pressure, suitable for occasions with small resistance; the latter has large air pressure and relatively small air volume, suitable for situations that need to overcome large air resistance. Spraying system: including spray head and water supply pipeline, used to uniformly spray cooling water on the outside of the heat exchanger. When the hot fluid flows in the heat exchanger, the cooling water sprayed on the internal heat exchanger absorbs heat and partially evaporates, and the evaporation process will take away a lot of heat, thereby reducing the temperature of the hot fluid. Water collecting tank: located at the bottom of the cooling tower, used to collect the cooling water falling from the internal heat exchanger and the spraying system. The water in the water collecting tank is pumped by the internal water pump to the spraying system again, realizing the recycling of the cooling water. Working principle: The working process of the closed cooling tower 4 is a complex heat exchange and evaporation cooling process. The internally closed circulating hot fluid (first cooling water) flows in the pipe of the internal heat exchanger, and the spraying water outside the pipe forms a water film on the surface of the heat exchanger. The fan makes air pass through the water film and fins, at this time two cooling mechanisms occur. Sensible heat exchange: the hot fluid transfers heat to the cooling water outside the pipe through the pipe wall and fins, and the cooling water temperature rises, which is a sensible heat exchange process. Evaporative cooling: due to the action of the fan, part of the water evaporates when the air passes through the water film. The water absorbs a lot of heat in the evaporation process, which mainly comes from the hot fluid, thereby further reducing the temperature of the hot fluid. After these two cooling mechanisms, the temperature of the hot fluid is significantly reduced, and then it returns to the equipment that needs to be cooled for continuous circulation.

[0034] While the present application has been described with reference to the numerous explanatory embodiments thereof, it is to be understood that various other modifications can be effected within the scope of the application, as described in the claims. More specifically, many variations and modifications will be apparent to those skilled in the art from the description and drawings herein, given the benefit of the description, drawings and claims as a whole. Other uses will be apparent to those skilled in the art.

Claims

1. A high temperature sewage heat extraction system, characterized in that, The heat pump unit (1), sewage supply pipeline (2), closed cooling tower (4), water inlet pipe (13) and water outlet pipe (14), the high temperature sewage in the sewage supply pipeline (2) enters the evaporator (5) of the heat pump unit (1) to release heat, the water inlet pipe (13) is connected with the water inlet of the condenser (7) of the heat pump unit (1), the water outlet of the condenser (7) is connected with the water outlet pipe (14), and the sewage supply pipeline (2) is connected with the closed cooling tower (4) through the water distribution pipeline (8).

2. A high temperature sewage heat energy extraction system according to claim 1, characterized in that: The sewage supply pipeline (2) is connected with the water inlet of the evaporator (5), and the water outlet of the evaporator (5) is connected with the first drain pipe (9).

3. A high temperature sewage heat energy extraction system according to claim 1, characterized in that: The sewage supply pipeline (2) is provided with a three-way valve (10), and the water distribution pipeline (8) is connected with the sewage supply pipeline (2) through the three-way valve (10).

4. The high temperature sewage heat extraction system of claim 1, wherein: The water outlet pipe (14) is connected with the water storage tank (15) away from the condenser (7), and the water storage tank (15) is provided with a water tank outlet pipe (22).

5. A high temperature sewage heat energy extraction system as claimed in claim 4, wherein: The water storage tank (15) is provided with a water inlet cavity (16) and a water storage cavity (17), the bottom of the water inlet cavity (16) is provided with a filter channel (18) connected with the water storage cavity (17), the filter channel (18) is provided with a filter core (19), and the water outlet pipe (14) is connected with the water inlet cavity (16) away from the condenser (7).

6. A high temperature sewage heat extraction system according to claim 5, wherein: The side of the water storage tank (15) is provided with a mounting port (20) connected with the filter channel (18), the outer side of the water storage tank (15) is provided with a sealing plate (21) for closing the mounting port (20), and the filter core (19) is connected with the inner side of the sealing plate (21).

7. A high temperature sewage heat extraction system as claimed in claim 6, wherein: The sealing plate (21) is fixed to the outer side of the water storage tank (15) by screws, and the sealing ring is arranged at the abutting position of the sealing plate (21) and the water storage tank (15).

8. A high temperature sewage heat extraction system according to claim 1, characterized in that: The closed cooling tower (4) is connected with the second drain pipe (23).

9. A high temperature sewage heat extraction system according to claim 1, characterized in that: The water pump (24) is arranged on the water inlet pipe (13).

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