A low temperature evaporator system utilizing waste heat

Abstract

The utility model discloses a kind of low-temperature evaporator systems using waste heat, including waste heat source input module, first heat exchanger, evaporating tower, second heat exchanger and absorption tower, first heat exchanger is equipped with to be handled liquid pipeline, waste heat source input module is connected with first heat exchanger and carries out heat exchange, the liquid outlet end of to be handled liquid pipeline is connected with evaporating tower, the inside of evaporating tower is equipped with spraying device and filler, evaporating tower top is connected with exhaust pipe, exhaust pipe is connected with absorption tower, the gas outlet end of absorption tower is connected with second heat exchanger and carries out heat exchange, evaporating tower connects fan and extracts second heat exchanger place hot air and enters evaporating tower inside.The utility model is connected waste heat source input module, the heat of waste heat source is fully utilized and exchanges heat with the to-be-handled liquid in first heat exchanger, improve the temperature of to-be-handled liquid into evaporating tower, again by second heat exchanger, fan, after processing gas is introduced into evaporating tower by waste heat, evaporating tower is also connected with solid-liquid separator, improve waste liquid evaporation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of industrial environmental protection and evaporation technology, and in particular to a low-temperature evaporator system that utilizes waste heat. Background Technology

[0002] Industrial wastewater and exhaust gas typically contain a large amount of residual heat, which is at a high temperature and is emitted in large quantities. Currently, most enterprises tend to directly discharge these industrial wastewater and exhaust gases into the atmosphere without effectively recovering and utilizing the residual heat they carry, resulting in energy waste.

[0003] Traditional evaporation, concentration and crystallization systems mainly rely on external energy sources such as electricity and coal to provide the heat required for evaporation, resulting in problems such as high energy consumption and high cost. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the purpose of this utility model is to provide a low-temperature evaporator system that utilizes waste heat.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a low-temperature evaporator system utilizing waste heat, including a waste heat source input module, a first heat exchanger, an evaporation tower, a second heat exchanger, and an absorption tower. The first heat exchanger is equipped with a liquid to be treated pipeline. The waste heat source input module is connected to the first heat exchanger for heat exchange. The liquid outlet of the liquid to be treated pipeline is connected to the evaporation tower. The evaporation tower is equipped with a spray device and packing inside. The top of the evaporation tower is connected to an exhaust pipe, which is connected to the absorption tower. The air outlet of the absorption tower is connected to the second heat exchanger for heat exchange. The evaporation tower is connected to a fan, which is used to draw hot air from the second heat exchanger into the evaporation tower.

[0006] As a further improvement of this utility model, a third heat exchanger is also provided, which is equipped with a liquid input pipeline and a heat exchange pipeline. The liquid outlet of the absorption tower is connected to the heat exchange pipeline for heat exchange. The liquid input pipeline of the third heat exchanger is connected to the liquid inlet of the liquid input pipeline of the first heat exchanger.

[0007] As a further improvement of this utility model: the heat exchange pipeline of the third heat exchanger is connected to a discharge pipe.

[0008] As a further improvement of this utility model: the bottom of the evaporation tower is connected to a circulation pipe and a circulation spray pump, and the circulation pipe is connected to the spray device.

[0009] As a further improvement of this utility model: the outlet end of the waste heat source input module is connected to the inlet end of the first heat exchanger through an input pipeline, the outlet end of the first heat exchanger is connected to the inlet end of the waste heat source input module through an output pipeline, and a first pump body is provided on the output pipeline.

[0010] As a further improvement of this utility model: the outlet end of the second heat exchanger is connected to a discharge pipe, which is connected to the gas outlet end of the absorption tower.

[0011] As a further improvement of this utility model: the evaporation tower is also provided with a first drain line and a second drain line, and valve assemblies are respectively provided on the first drain line and the second drain line. A spray assembly is connected to the end of the second drain line.

[0012] As a further improvement of this utility model: the bottom of the evaporation tower is also connected to a reflux pipe, which is connected to the inlet end of the liquid to be treated pipeline, and a valve assembly is provided on the reflux pipe.

[0013] As a further improvement of this utility model: a second pump body is installed near the inlet end of the liquid to be treated pipeline.

[0014] As a further improvement of this utility model: the airflow discharged by the fan flows from the bottom to the top of the evaporation tower.

[0015] As a further improvement of this utility model: the bottom of the evaporation tower is connected to the inlet end of the solid-liquid separator, and the outlet end of the solid-liquid separator is connected to the evaporation tower or to the inlet end of the pipeline of the liquid to be treated.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention connects a waste heat source input module to a first heat exchanger, allowing the heat contained in the waste heat source to exchange with the liquid to be treated pipeline, making full use of the waste heat source and raising the temperature of the liquid to be treated entering the evaporation tower. A second heat exchanger is also designed to exchange the waste heat carried by the gas after treatment in the evaporation tower and absorption tower again. The waste heat is carried by the gas carried by the fan and introduced into the evaporation tower, forming a circulating waste heat utilization pipeline to realize the evaporation of the liquid to be treated. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a structural schematic diagram of an embodiment of the present invention.

[0020] Figure label:

[0021] 1. Waste heat source input module; 2. First heat exchanger; 3. Evaporator; 31. Return pipe; 4. Second heat exchanger; 5. Absorption tower; 6. Third heat exchanger; 7. Fan; 8. Circulating spray pump; 9. First pump body; 10. Second pump body; 11. Solid-liquid separator. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In order to solve the technical problems in the prior art, the present invention will be further described in conjunction with the accompanying drawings and embodiments:

[0024] like Figures 1 to 2 As shown in the figure, this utility model embodiment discloses a low-temperature evaporator system utilizing waste heat, including a waste heat source input module 1, a first heat exchanger 2, an evaporation tower 3, a second heat exchanger 4, and an absorption tower 5. The first heat exchanger 2 is equipped with a liquid to be treated pipeline. The waste heat source input module 1 is connected to the first heat exchanger 2 for heat exchange. The liquid outlet of the liquid to be treated pipeline is connected to the evaporation tower 3. The evaporation tower 3 is equipped with a spray device and packing inside. An exhaust pipe is connected to the top of the evaporation tower 3 and is connected to the absorption tower 5. The air outlet of the absorption tower 5 is connected to the second heat exchanger 4 for heat exchange. The evaporation tower 3 is connected to a fan 7, which is used to draw hot air from the second heat exchanger 4 into the evaporation tower 3.

[0025] The waste heat source input module 1 can collect waste heat, industrial wastewater, and exhaust gas suitable for heat exchange. Through the collaborative design of the waste heat source input module 1 and the first heat exchanger 2, primary heat exchange between waste heat and the liquid to be treated is achieved, increasing the temperature of the liquid and reducing evaporation energy consumption. The combination of the spray device and packing layer inside the evaporation tower 3 enhances gas-liquid contact efficiency and promotes low-temperature evaporation. The secondary heat recovery design of the absorption tower 5 and the second heat exchanger 4 reuses the waste heat source before discharging it. The fan 7 guides the airflow circulation, reintroducing the low-temperature waste heat recovered by the second heat exchanger 4 back to the bottom of the evaporation tower 3, forming hot air-assisted evaporation and further reducing energy consumption.

[0026] Furthermore, the airflow discharged by the blower 7 flows from the bottom to the top of the evaporation tower 3. The blower 7 drives the airflow to flow from bottom to top, forming a countercurrent contact with the sprayed liquid at the top, prolonging the heat and mass exchange time and improving the evaporation efficiency of the waste liquid.

[0027] like Figure 1As shown, the bottom of the evaporator 3 is connected to the inlet of the solid-liquid separator 11 via a pipeline, and the outlet of the solid-liquid separator 11 is connected to the evaporator 3 via a pipeline. The concentrated liquid from the evaporator 3 enters the solid-liquid separator for processing, and the mother liquor from the outlet of the solid-liquid separator 11 continues to flow back into the evaporator 3 for evaporation. The solid waste discharged from the solid waste end of the solid-liquid separator 11 is transported off-site for disposal.

[0028] The solid-liquid separator 11 can be a centrifuge. A pump can be installed between the evaporator tower 3 and the solid-liquid separator 11 to pump the concentrate and mother liquor.

[0029] In some implementations, the outlet end of the waste heat source input module 1 is connected to the inlet end of the first heat exchanger 2 via an input pipeline, and the outlet end of the first heat exchanger 2 is connected to the inlet end of the waste heat source input module 1 via an output pipeline, with a first pump body 9 provided on the output pipeline.

[0030] The waste heat source forms a closed loop through the input pipeline and the output pipeline. In conjunction with the first pump body 9, the flow rate is controlled to ensure a stable input of heat source and avoid heat fluctuations from affecting evaporation efficiency.

[0031] In some embodiments, the outlet end of the second heat exchanger 4 is connected to a discharge pipe, which is connected to the gas outlet end of the absorption tower 5.

[0032] The exhaust pipe of the second heat exchanger 4 is connected to the gas outlet of the absorption tower 5, so that the final treated exhaust gas is discharged in a centralized manner, which facilitates subsequent environmental monitoring or secondary waste heat recovery.

[0033] In some embodiments, a third heat exchanger 6 is also provided, which is equipped with a liquid-to-be-treated input pipeline and a heat exchange pipeline. The liquid outlet of the absorption tower 5 is connected to the heat exchange pipeline for heat exchange. The liquid-to-be-treated input pipeline of the third heat exchanger 6 is connected to the liquid inlet of the liquid-to-be-treated pipeline in the first heat exchanger 2.

[0034] Adding a third heat exchanger 6 enables three-stage heat exchange between the liquid effluent from the absorption tower 5 and the liquid to be treated. The residual heat in the liquid discharged from the absorption tower 5 is used to preheat the newly added liquid to be treated, thus achieving cascade utilization of heat.

[0035] Furthermore, the heat exchange pipeline of the third heat exchanger 6 is connected to a discharge pipe.

[0036] The residual heat carried by the liquid flowing out after treatment in the absorption tower 5 is exchanged through the third heat exchanger 6 and then discharged to the outside through the discharge pipe.

[0037] Furthermore, a second pump body 10 is installed at the inlet end of the liquid to be treated pipeline. The second pump body 10 is located between the inlet end of the liquid to be treated pipeline and the evaporation tower.

[0038] In some embodiments, the bottom of the evaporator 3 is externally connected to a circulation pipe and a circulation spray pump 8, and the circulation pipe is connected to the spray device.

[0039] The circulation pipeline and spray pump enable dynamic circulation of liquid within the evaporation tower 3. The spray volume is adjustable to meet the evaporation needs of liquids with different concentrations. Incompletely evaporated liquid is reused to reduce waste liquid discharge.

[0040] In some embodiments, the evaporator tower 3 is also provided with a first drain line and a second drain line, and valve assemblies are respectively provided on the first drain line and the second drain line. A spray assembly is connected to the end of the second drain line.

[0041] The first and second drain lines are independently controlled by valve assemblies. The liquid to be treated after passing through the first heat exchanger 2 and the third heat exchanger 6 enters the evaporation tower 3 and can be discharged through the first drain line and / or the second drain line, depending on the specific design requirements.

[0042] In some embodiments, the bottom of the evaporator 3 is also connected to a reflux pipe, which is connected to the inlet end of the liquid to be treated pipeline, and a valve assembly is provided on the reflux pipe.

[0043] like Figure 2 As shown, furthermore, the liquid outlet of the fixed separator 11 can be connected to the return pipe 31, and a pump can be installed between the evaporator 3 and the liquid inlet of the untreated liquid pipeline in the first heat exchanger 2 to pump the concentrate and mother liquor. The mother liquor processed by the solid-liquid separator 11 flows into the return pipe 31, enters the untreated liquid pipeline, exchanges heat with the waste heat source flowing through the waste heat source input module in the first heat exchanger 2, and then enters the evaporator 3 for evaporation treatment.

[0044] The main functions of this utility model are:

[0045] 1. A waste heat source input module is designed to collect waste heat. The waste heat source input module exchanges heat with the liquid to be treated flowing in the first heat exchanger to increase the temperature of the liquid to be treated entering the evaporation tower. The absorption tower is connected to the evaporation tower to treat the gas evaporated from the liquid to be treated. At the same time, the waste heat carried by the treated gas is exchanged with the second heat exchanger before being discharged. The heat at the second heat exchanger is introduced into the evaporation tower by a fan, realizing multi-stage utilization of waste heat source and completing the evaporation treatment of the liquid to be treated.

[0046] 2. A third heat exchanger is also designed to introduce the liquid treated by the absorption tower into the heat exchange pipeline of the third heat exchanger. The waste heat carried by the liquid is exchanged with the liquid to be treated in the input pipeline of the third heat exchanger. The temperature of the waste liquid entering the first heat exchanger through the liquid to be treated in the input pipeline is increased, and the waste heat is recycled to complete the evaporation of the waste liquid.

[0047] In summary, any other corresponding modifications made by those skilled in the art after reading this utility model document, based on the technical solution and concept of this utility model without creative mental effort, shall all fall within the scope of protection of this utility model.

Claims

1. A low temperature evaporator system utilizing waste heat, characterized by, The system includes a waste heat source input module, a first heat exchanger, an evaporator, a second heat exchanger, and an absorption tower. The first heat exchanger contains a pipeline for the liquid to be treated. The waste heat source input module is connected to the first heat exchanger for heat exchange. The outlet end of the pipeline for the liquid to be treated is connected to the evaporator. The evaporator contains a spray device and packing material. An exhaust pipe is connected to the top of the evaporator and is connected to the absorption tower. The outlet end of the absorption tower is connected to the second heat exchanger for heat exchange. The evaporator is connected to a fan, which is used to draw hot air from the second heat exchanger into the evaporator.

2. A low temperature evaporator system utilizing waste heat according to claim 1, characterized in that, A third heat exchanger is also provided, which contains an input pipeline for the liquid to be treated and a heat exchange pipeline. The outlet end of the absorption tower is connected to the heat exchange pipeline for heat exchange. The input pipeline for the liquid to be treated of the third heat exchanger is connected to the inlet end of the input pipeline for the liquid to be treated of the first heat exchanger.

3. A low temperature evaporator system utilizing waste heat according to claim 2, characterized in that, The heat exchange pipeline of the third heat exchanger is connected to a discharge pipe.

4. A low temperature evaporator system utilizing waste heat according to any one of claims 1 to 3, characterized in that, The bottom of the evaporation tower is connected to a circulation pipe and a circulation spray pump, and the circulation pipe is connected to the spray device.

5. The low temperature evaporator system utilizing waste heat of claim 1, wherein, The outlet end of the waste heat source input module is connected to the inlet end of the first heat exchanger via an input pipeline, and the outlet end of the first heat exchanger is connected to the inlet end of the waste heat source input module via an output pipeline. A first pump body is provided on the output pipeline.

6. The low temperature evaporator system utilizing waste heat of claim 1, wherein, The outlet end of the second heat exchanger is connected to a discharge pipe, which is connected to the gas outlet end of the absorption tower.

7. A low temperature evaporator system utilizing waste heat according to claim 4, wherein, The evaporation tower is also equipped with a first drain line and a second drain line. The first drain line and the second drain line are respectively equipped with valve assemblies, and the end of the second drain line is connected to a spray assembly.

8. A low temperature evaporator system utilizing waste heat according to claim 7, characterized in that, The bottom of the evaporation tower is also connected to a reflux pipe, which is connected to the inlet end of the liquid to be treated pipeline, and a valve assembly is provided on the reflux pipe.

9. A low temperature evaporator system utilizing waste heat according to claim 8, characterized in that, A second pump body is installed near the inlet end of the liquid to be treated pipeline.

10. A low temperature evaporator system utilizing waste heat according to claim 1 or 8, characterized in that, The bottom of the evaporation tower is connected to the inlet end of the solid-liquid separator, and the outlet end of the solid-liquid separator is connected to the evaporation tower or to the inlet end of the pipeline containing the liquid to be treated.

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