A waste heat recycling water concentration unit

Abstract

The utility model relates to water condensing unit technical field especially relates to a water condensing unit of waste heat recycling, a water condensing unit of waste heat recycling includes: bottom plate, first recovery subassembly, steam pipe, second recovery subassembly, first evaporation jar, delivery pipe, the top front side of bottom plate is installed with support frame, and support frame is installed with cold material liquid storage tank and boiler respectively on respectively, and the bottom of cold material liquid storage tank is installed with feed pump, and the output fixedly connected with first water pipe of feed pump, and the top of bottom plate is fixedly connected with a plurality of support legs with support frame parallel right end, a plurality of support legs's top fixedly connected with waste heat heat exchanger, and the right side of waste heat heat exchanger installs first recovery subassembly at the top of bottom plate. The bottom of boiler is fixedly connected with steam pipe. The utility model reduces the heating load of subsequent main heat exchanger, realizes thermal energy cascade utilization, greatly reduces the energy requirement of external heat source such as boiler, improves thermal energy utilization, reduces resource waste.

Description

Technical Field

[0001] This utility model relates to the technical field of water concentration units, and in particular to a water concentration unit that utilizes waste heat. Background Technology

[0002] A water concentrator is a device that increases the concentration of solutes in an aqueous solution through evaporation. It uses a heating system to evaporate solvents such as water, then recovers the vapor through a condensation system. Simultaneously, a vacuum system lowers the boiling point of the solution to improve efficiency. Combined with a material handling and automated control system, it enables continuous operation and is widely used in food processing, chemical production, wastewater treatment, and other fields. Energy-saving structures such as multi-effect evaporation or mechanical vapor recompression can be designed according to requirements, concentrating materials while optimizing energy consumption.

[0003] Most water concentrators typically rely on single-effect evaporation consisting of a heat exchanger and an evaporator. In single-effect evaporation, the secondary steam generated by the first evaporation is directly cooled by the condenser, and the heat it carries is not reused. It relies solely on an external heat source for continuous heating, resulting in a large amount of steam consumption per unit of material concentrated. Furthermore, the condensation process requires more cooling water, leading to low thermal energy utilization and higher energy consumption.

[0004] Therefore, it is necessary to provide a new water concentrator unit that utilizes waste heat to solve the above-mentioned technical problems. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a water concentrator unit for waste heat recovery.

[0006] This utility model provides a waste heat recovery water concentrator unit comprising: a base plate, a first recovery component, a steam pipe, a second recovery component, a first evaporator, and a conveying pipe. A support frame is installed on the front top of the base plate, and a cold feed liquid storage tank and a boiler are respectively installed on the support frame. A feed pump is installed at the bottom of the cold feed liquid storage tank, and a first water pipe is fixedly connected to the output end of the feed pump. Multiple support legs are fixedly connected to the right end of the top of the base plate, parallel to the support frame. A waste heat exchanger is fixedly connected to the top of the multiple support legs. The first recovery component is installed on the right side of the waste heat exchanger at the top of the base plate. A steam pipe is fixedly connected to the bottom of the boiler. A main heat exchanger is installed at the top center of the bottom plate. A second recovery assembly is installed at the top of the bottom plate to the left of the main heat exchanger. A first evaporator is installed at the top of the bottom plate behind the second recovery assembly. A first transmission pipe is fixedly connected to one side of the first evaporator. A conveying pipe is fixedly connected to the evaporation hole of the first evaporator. A concentrated liquid conveying pump is installed at the discharge hole of the first evaporator. A second transmission pipe is fixedly connected to the output end of the concentrated liquid conveying pump. A second evaporator is fixedly connected to the end of the second transmission pipe away from the concentrated liquid conveying pump. A vacuum pump is installed at the evaporation hole of the second evaporator. A concentrated liquid pipe is fixedly connected to the discharge hole of the second evaporator.

[0007] Preferably, the first recovery component includes a first condensate recovery tank, the bottom end of which is fixedly connected to the top end of the base plate on the right side of the waste heat exchanger, and a second water pipe is fixedly connected to the top end of the first condensate recovery tank. The end of the second water pipe away from the first condensate recovery tank is fixedly connected to the hot side outlet of the waste heat exchanger.

[0008] Preferably, the second recovery component includes a second condensate recovery tank, the bottom of which is fixedly connected to the top of the base plate on the left side of the main heat exchanger, and a third water pipe is fixedly connected to the top of the second condensate recovery tank.

[0009] Preferably, the end of the first water pipe furthest from the feed pump is fixedly connected to the cold side inlet of the waste heat exchanger.

[0010] Preferably, the end of the steam pipe furthest from the boiler is fixedly connected to the hot side inlet of the main heat exchanger, and the cold side outlet of the waste heat exchanger is fixedly connected to the cold side inlet of the main heat exchanger.

[0011] Preferably, the end of the first transmission pipe away from the first evaporator is fixedly connected to the cold side outlet of the main heat exchanger.

[0012] Preferably, the end of the conveying pipe away from the evaporation hole of the first evaporator is fixedly connected to the hot side inlet of the waste heat exchanger, and the bottom ends of the first evaporator and the second evaporator are fixedly connected to the top of the base plate behind the main heat exchanger.

[0013] Preferably, the side of the third water pipe furthest from the second condensate recovery tank is fixedly connected to the hot side outlet of the main heat exchanger.

[0014] Compared with related technologies, the waste heat recovery water concentrator provided by this utility model has the following beneficial effects:

[0015] Waste heat utilization in stages reduces energy consumption: In traditional single-effect units, the secondary steam generated by the first evaporator is directly condensed, and the heat is not reused, requiring continuous reliance on external heat sources. This unit utilizes the secondary steam discharged from the first evaporator, which first exchanges heat with the cold feed liquid in the waste heat exchanger, allowing the cold feed liquid to absorb waste heat and complete preheating. This reduces the heating load on the subsequent main heat exchanger, achieving cascade utilization of thermal energy and significantly reducing the energy consumption demand on external heat sources such as boilers.

[0016] Improving thermal energy utilization and reducing resource waste: In traditional single-effect units, heat is directly lost with the condensate when condensing secondary steam, and cooling water consumption is high. In this unit, after the secondary steam releases heat and condenses in the waste heat exchanger, the condensate is recovered through the first recovery component; the steam condensate in the main heat exchanger is recovered through the second recovery component, thus recovering water resources and avoiding heat waste, significantly improving the utilization rate of thermal energy and water resources.

[0017] Double-effect evaporation for deeper concentration, adapting to diverse needs: Traditional single-effect units only perform evaporation once, resulting in limited concentration. This unit, after initial concentration in the first evaporator, uses a concentrate transfer pump to send the material to the second evaporator. Combined with a vacuum pump creating a vacuum environment, the boiling point of the solution is lowered, achieving deep concentration. Attached Figure Description

[0018] Figure 1 A schematic diagram of a water concentrator for waste heat recovery provided by this utility model;

[0019] Figure 2 for Figure 1 The diagram shows the structure of the base plate.

[0020] Figure 3 for Figure 1 The diagram shows the structure of the support frame.

[0021] Figure 4 for Figure 1 The diagram shows the structure of a waste heat exchanger.

[0022] Labels in the diagram: 1. Base plate; 2. Support frame; 3. Cold feed liquid storage tank; 4. Boiler; 5. Feed pump; 6. First water pipe; 7. Waste heat exchanger; 8. Second water pipe; 9. First condensate recovery tank; 10. Support leg; 11. Steam pipe; 12. Main heat exchanger; 13. Third water pipe; 14. Second condensate recovery tank; 15. First transfer pipe; 16. First evaporator; 17. Delivery pipe; 18. Concentrate delivery pump; 19. Second transfer pipe; 20. Second evaporator; 21. Vacuum pump; 22. Concentrate pipe. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0025] Please see Figures 1 to 4A waste heat recovery water concentrator unit includes: a base plate 1, which serves as the fundamental load-bearing component of the entire unit. A support frame 2 is installed on the front top of the base plate 1. This support frame 2 possesses sufficient strength and stability to support a cold feed liquid storage tank 3 and a boiler 4 installed above. The cold feed liquid storage tank 3 stores the cold feed liquid to be concentrated, while the boiler 4 serves as a steam source. A feed pump 5 is installed at the bottom of the cold feed liquid storage tank 3. The feed pump 5 generates power upon startup, and its output end is fixedly connected to a first water pipe 6 for transporting the cold feed liquid. Multiple support legs 10 are fixedly connected to the right end of the base plate 1, parallel to the support frame 2. These support legs 10 are distributed at certain intervals to jointly support a waste heat exchanger 7 fixedly connected at the top. The end of the first water pipe 6 furthest from the feed pump 5 is fixedly connected to the cold side inlet of the waste heat exchanger 7 to transport the cold feed liquid into the waste heat exchanger 7.

[0026] In the first recovery component section, the top of the base plate 1 is located in the right-side area of ​​the waste heat exchanger 7, and a first recovery component is installed there. Specifically, the first recovery component is a first condensate recovery tank 9. The bottom end of the first condensate recovery tank 9 is fixedly connected to the corresponding position of the top of the base plate 1 on the right side of the waste heat exchanger 7. A second water pipe 8 is fixedly connected to the top of the first condensate recovery tank 9. The end of the second water pipe 8 away from the first condensate recovery tank 9 is fixedly connected to the hot-side outlet of the waste heat exchanger 7 for recovering the condensate on the hot side of the waste heat exchanger 7.

[0027] Regarding the steam pipe 11, the bottom end of the boiler 4 is fixedly connected to the steam pipe 11, and the top center of the bottom plate 1 is equipped with the main heat exchanger 12. The end of the steam pipe 11 away from the boiler 4 is fixedly connected to the hot side inlet of the main heat exchanger 12 for transporting the steam generated by the boiler 4. At the same time, the cold side outlet of the waste heat exchanger 7 is fixedly connected to the cold side inlet of the main heat exchanger 12 to ensure that the preheated liquid enters the main heat exchanger 12.

[0028] In the second recovery component section, the top of the base plate 1 is located on the left side of the main heat exchanger 12, and a second recovery component is installed there. This second recovery component is a second condensate recovery tank 14. The bottom end of the second condensate recovery tank 14 is fixedly connected to the corresponding area of ​​the top of the base plate 1 on the left side of the main heat exchanger 12. A third water pipe 13 is fixedly connected to the top of the second condensate recovery tank 14. The side of the third water pipe 13 away from the second condensate recovery tank 14 is fixedly connected to the hot side outlet of the main heat exchanger 12 for recovering the condensate on the hot side of the main heat exchanger 12.

[0029] The first evaporator 16 is located at the top of the bottom plate 1 behind the second recovery assembly. The first evaporator 16 is installed thereon. A first transmission pipe 15 is fixedly connected to one side of the first evaporator 16. The end of this component away from the first evaporator 16 is fixedly connected to the cold side outlet of the main heat exchanger 12 and is used to transport the liquid heated by the main heat exchanger 12 into the first evaporator 16.

[0030] In the conveying pipe section 17, the evaporation hole of the first evaporator 16 is fixedly connected to the conveying pipe 17. The end of the conveying pipe 17 away from the evaporation hole of the first evaporator 16 is fixedly connected to the hot side inlet of the waste heat exchanger 7 for conveying the secondary steam generated by the first evaporator 16. A concentrate conveying pump 18 is installed at the discharge hole of the first evaporator 16. The output end of the concentrate conveying pump 18 is fixedly connected to the second transmission pipe 19. The end of the second transmission pipe 19 away from the concentrate conveying pump 18 is fixedly connected to the second evaporator 20. The bottom ends of the first evaporator 16 and the second evaporator 20 are respectively fixedly connected to the top of the base plate 1 in the corresponding installation area behind the main heat exchanger 12. A vacuum pump 21 is installed at the evaporation hole of the second evaporator 20 for creating a vacuum environment. A concentrate pipe 22 is fixedly connected to the discharge hole of the second evaporator 20 for discharging the final concentrate.

[0031] The working principle of the waste heat recovery water concentrator unit provided by this utility model is as follows:

[0032] In the initial preparation stage, the cold feed liquid is stored in the cold feed liquid storage tank 3 to prepare for the subsequent concentration process. When the system is started, the feed pump 5 starts working first. It draws the cold feed liquid from the cold feed liquid storage tank 3 and pushes the cold feed liquid to the first water pipe 6 with its own power. Under the continuous action of the feed pump 5, the cold feed liquid flows along the first water pipe 6 to the cold side inlet of the waste heat exchanger 7 to start the preheating process of the material.

[0033] At the same time, boiler 4 starts to operate, and the steam generated is transported through steam pipe 11. The steam travels along steam pipe 11 to the hot side inlet of main heat exchanger 12, providing the heat source required for heating the main heat exchanger 12. The heat transfer preparation work in the main heat exchanger 12 is completed, waiting to exchange heat with the preheated material.

[0034] After the cold feed liquid enters the cold side of the waste heat exchanger 7, the secondary steam generated by the evaporation in the first evaporator 16 is transported to the hot side inlet of the waste heat exchanger 7 via the conveying pipe 17. At this time, the cold feed liquid and the secondary steam exchange heat in the waste heat exchanger 7. The cold feed liquid absorbs the waste heat of the secondary steam, and its temperature is raised, completing the initial preheating. After the secondary steam releases heat, it condenses into condensate on the hot side of the waste heat exchanger 7, which is recovered by the first recovery component to avoid the waste of heat and water resources. The preheated cold feed liquid flows out from the cold side outlet of the waste heat exchanger 7 and then enters the... The preheated liquid entering the cold side of the main heat exchanger 12 undergoes secondary heat exchange with steam from the boiler 4 via steam pipe 11 on the hot side of the main heat exchanger 12. The liquid absorbs a large amount of heat from the steam, further increasing its temperature to near evaporation conditions, preparing it for subsequent entry into the evaporator. After releasing heat, the steam condenses into water, which is recovered through the second recovery component, achieving rational utilization of heat energy and water resources. The liquid, having completed secondary heat exchange, flows out from the cold side outlet of the main heat exchanger 12 and is transported to the first evaporator 16 via the first transmission pipe 15. The high-temperature liquid entering the first evaporator 16 begins the evaporation process within the tank environment. The water in the liquid is heated and converted into secondary steam, which is discharged from the evaporation holes of the first evaporator 16 and then transported again via the conveying pipe 17 to the hot side of the waste heat exchanger 7 to continue participating in the preheating process of the cold liquid, thus achieving waste heat recycling. Meanwhile, the concentrated liquid, after preliminary concentration in the first evaporator 16, is pushed to the second transmission pipe 19 by the concentrated liquid conveying pump 18, and then transported to the second evaporator 20 through the second transmission pipe 19 to enter the secondary concentration stage. After the second evaporator 20, the vacuum pump 21 starts working to perform a vacuum operation inside the second evaporator 20. The vacuum environment lowers the boiling point of the solution, allowing the concentrate to continue evaporating at a relatively low temperature, further removing water. The secondary steam generated in this process is promptly extracted and processed due to the negative pressure created by the vacuum pump 21, ensuring that the evaporation in the second evaporator 20 is continuous and efficient. The material after being deeply concentrated in the second evaporator 20 is finally discharged from the discharge port of the second evaporator 20 through the concentrate pipe 22, completing the entire water concentration process.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A water concentrator unit for waste heat recovery, characterized in that, include: A base plate (1) is provided with a support frame (2) installed on the front side of the top of the base plate (1). A cold material liquid storage tank (3) and a boiler (4) are respectively installed on the support frame (2). A feed pump (5) is installed at the bottom of the cold material liquid storage tank (3). A first water pipe (6) is fixedly connected to the output end of the feed pump (5). Multiple support legs (10) are fixedly connected to the right end of the top of the base plate (1) parallel to the support frame (2). A waste heat exchanger (7) is fixedly connected to the top of the multiple support legs (10). The first recovery component is installed on the top of the base plate (1) to the right of the waste heat exchanger (7); Steam pipe (11) is fixedly connected to the bottom end of the boiler (4), and the main heat exchanger (12) is installed in the middle of the top of the bottom plate (1). The second recovery assembly is installed on the top of the base plate (1) to the left of the main heat exchanger (12); The first evaporator (16) is installed at the top of the bottom plate (1) behind the second recovery assembly. The first transfer pipe (15) is fixedly connected to one side of the first evaporator (16). The conveying pipe (17) is fixedly connected to the evaporation hole of the first evaporator (16). The discharge hole of the first evaporator (16) is equipped with a concentrate delivery pump (18). The output end of the concentrate delivery pump (18) is fixedly connected to a second transmission pipe (19). The end of the second transmission pipe (19) away from the concentrate delivery pump (18) is fixedly connected to a second evaporator (20). A vacuum pump (21) is installed at the evaporation hole of the second evaporator (20). The discharge hole of the second evaporator (20) is fixedly connected to a concentrate pipe (22).

2. The water concentrator unit for waste heat recovery according to claim 1, characterized in that, The first recovery component includes a first condensate recovery tank (9). The bottom end of the first condensate recovery tank (9) is fixedly connected to the top end of the base plate (1) on the right side of the waste heat exchanger (7). A second water pipe (8) is fixedly connected to the top end of the first condensate recovery tank (9). The end of the second water pipe (8) away from the first condensate recovery tank (9) is fixedly connected to the hot side outlet of the waste heat exchanger (7).

3. A water concentrator for waste heat recovery according to claim 1, characterized in that, The second recovery component includes a second condensate recovery tank (14), the bottom of which is fixedly connected to the top of the base plate (1) on the left side of the main heat exchanger (12), and a third water pipe (13) is fixedly connected to the top of the second condensate recovery tank (14).

4. A water concentrator for waste heat recovery according to claim 1, characterized in that, The end of the first water pipe (6) away from the feed pump (5) is fixedly connected to the cold side inlet of the waste heat exchanger (7).

5. A water concentrator unit for waste heat recovery according to claim 1, characterized in that, The end of the steam pipe (11) away from the boiler (4) is fixedly connected to the hot side inlet of the main heat exchanger (12), and the cold side outlet of the waste heat exchanger (7) is fixedly connected to the cold side inlet of the main heat exchanger (12).

6. A water concentrator for waste heat recovery according to claim 1, characterized in that, The end of the first transmission pipe (15) away from the first evaporator (16) is fixedly connected to the cold side outlet of the main heat exchanger (12).

7. A water concentrator for waste heat recovery according to claim 1, characterized in that, The end of the conveying pipe (17) away from the evaporation hole of the first evaporator (16) is fixedly connected to the hot side inlet of the waste heat exchanger (7). The bottom ends of the first evaporator (16) and the second evaporator (20) are fixedly connected to the top of the base plate (1) behind the main heat exchanger (12).

8. A water concentrator for waste heat recovery according to claim 3, characterized in that, The third water pipe (13) is fixedly connected to the hot side outlet of the main heat exchanger (12) on the side away from the second condensate recovery tank (14).

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