Cooling device for evaporation system and evaporation system

Abstract

The utility model discloses a cooling device for an evaporation system, the cooling device comprises a cooling tank body, a first heat exchange chamber and a second heat exchange chamber, the first heat exchange chamber and the second heat exchange chamber are attached to the outer surface of the cooling tank body, the cooling tank body comprises a first liquid inlet and a first liquid outlet, the first liquid inlet is used for introducing wastewater concentrate after flash evaporation, and the second liquid outlet is used for introducing wastewater concentrate after flash evaporation. The first heat exchange chamber is provided with a second liquid inlet and a second liquid outlet for introducing external cooling liquid, the second heat exchange chamber is provided with a third liquid inlet and a third liquid outlet, and the third liquid inlet is used for introducing wastewater stock solution. The first heat exchange chamber and the second heat exchange chamber which are independent are designed on the outer surface of the cooling tank body, the external cooling liquid is introduced into the first heat exchange chamber, and the waste water stock solution with lower temperature is introduced into the second heat exchange chamber for heat exchange, so that the heat is effectively recovered, the power consumption of a cooling liquid system is saved, and the heat exchange efficiency is improved. The design is ingenious.

Description

Technical Field

[0001] The utility model relates to the field of evaporation systems, in particular to a cooling device for an evaporation system and an evaporation system. Background Art

[0002] The cooling device designed for the cooling crystallization process in the traditional evaporation system usually includes a heat exchange layer to allow external cooling water to cool the wastewater concentrate. A large amount of cooling water is required during the cooling process, which not only wastes the heat in the evaporation system, but also consumes the electricity of the cooling water system. Summary of the invention

[0003] The utility model aims to provide a cooling device for an evaporation system and an evaporation system, so as to solve the problems of low heat recovery efficiency and high energy consumption of a traditional evaporation system.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a cooling device for an evaporation system, wherein the cooling device includes a cooling tank body and a first heat exchange chamber and a second heat exchange chamber attached to the outer surface of the cooling tank body, the cooling tank body includes a first liquid inlet and a first liquid outlet, the first liquid inlet is used to pass the wastewater concentrate after flash evaporation, the first heat exchange chamber has a second liquid inlet and a second liquid outlet for passing the external coolant, the second heat exchange chamber has a third liquid inlet and a third liquid outlet, the third liquid inlet is used to pass the wastewater raw liquid.

[0005] Preferably, the first heat exchange chamber is arranged on one side of the cooling tank body, and the second heat exchange chamber is arranged on the other side of the cooling tank body.

[0006] Preferably, the first heat exchange chamber is surrounded by a first U-shaped shell and the outer surface of the cooling tank body, and the second heat exchange chamber is surrounded by a second U-shaped shell and the outer surface of the cooling tank body.

[0007] Preferably, the first U-shaped shell is fixedly connected to the cooling tank body, a second liquid inlet is provided at the lower portion of the first U-shaped shell, and a second liquid outlet is provided at the upper portion of the first U-shaped shell; the second U-shaped shell is detachably connected to the cooling tank body, a third liquid inlet is provided at the lower portion of the second U-shaped shell, and a third liquid outlet is provided at the upper portion of the second U-shaped shell.

[0008] Preferably, the first liquid inlet is arranged at the upper part of the cooling tank body, the first liquid outlet is arranged at the bottom of the cooling tank body, and the first liquid outlet is arranged between the lower end of the first U-shaped shell and the lower end of the second U-shaped shell.

[0009] Preferably, the first U-shaped shell extends along one side outer surface of the cooling tank body, and the second U-shaped shell extends along the other side outer surface of the cooling tank body.

[0010] The utility model also provides an evaporation system, comprising a wastewater inlet, a heat exchanger, an exhaust condenser, a separation chamber and the above-mentioned cooling device which are connected in sequence, the wastewater inlet is connected to the heat exchanger through a first pipe, the heat exchanger is connected to the exhaust condenser through a second pipe, the separation chamber is used for flash evaporation to generate secondary steam, and a concentrated liquid outlet is provided at the bottom of the separation chamber, the concentrated liquid outlet is connected to the first liquid inlet of the cooling tank body of the cooling device, the third liquid inlet is connected to the first pipe, and the third liquid outlet is connected to the second pipe.

[0011] Preferably, the evaporation system also includes a distilled water tank and a heater, a first distilled water outlet is provided at the lower portion of the distilled water tank, a distilled water inlet is provided at the upper portion of the distilled water tank, a first steam outlet is provided at the top of the distilled water tank, the first distilled water outlet is connected to the heat exchanger for heating the wastewater raw liquid, and the first steam outlet is connected to the separation chamber; the heater includes a fourth liquid inlet and a fourth liquid outlet, and the heater is also provided with a steam inlet, a second distilled water outlet and a first air outlet, the separation chamber includes a circulating liquid outlet, a circulating liquid inlet and a secondary steam outlet, the circulating liquid outlet is connected to the fourth liquid inlet, the fourth liquid outlet is connected to the circulating liquid inlet, the secondary steam outlet is connected to the steam inlet of the heater, the second distilled water outlet is connected to the distilled water tank, the first air outlet is connected to the exhaust condenser, and the exhaust condenser is also connected to the distilled water inlet of the distilled water tank.

[0012] Preferably, a steam compressor is connected between the secondary steam outlet and the steam inlet of the heater.

[0013] Preferably, the evaporation system further comprises a steam generator, and the steam generator is in communication with the separation chamber.

[0014] Compared with the prior art, the utility model designs an independent first heat exchange chamber and a second heat exchange chamber on the outer surface of the cooling tank body, and passes external coolant into the first heat exchange chamber, and passes wastewater raw liquid with a lower temperature into the second heat exchange chamber for heat exchange, thereby effectively recovering heat and saving power consumption of the coolant system, and the design is ingenious. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of an evaporation system according to an embodiment of the present utility model.

[0016] Figure 2 It is a structural diagram of the cooling device in the embodiment of the utility model.

[0017] Figure 3 It is a cross-sectional view of the cooling device in the embodiment of the utility model.

[0018] Figure 4 It is a structural diagram of the separation chamber in the embodiment of the utility model.

[0019] Figure 5 It is a structural diagram of the heater in the embodiment of the utility model. DETAILED DESCRIPTION

[0020] In order to explain the technical content, structural features and effects achieved by the present invention in detail, the following is a detailed description in conjunction with the implementation modes and the accompanying drawings.

[0021] like Figures 1 to 3 As shown, the utility model provides a cooling device 1 for an evaporation system, the cooling device 1 comprises a cooling tank body 11 and a first heat exchange chamber 12 and a second heat exchange chamber 13 attached to the outer surface of the cooling tank body 11, the cooling tank body 11 comprises a first liquid inlet 111 and a first liquid outlet 112, the first liquid inlet 111 is used to introduce wastewater concentrate after flash evaporation, the first heat exchange chamber 12 has a second liquid inlet 122 and a second liquid outlet 123 for introducing external coolant, the second heat exchange chamber 13 has a third liquid inlet 132 and a third liquid outlet 133, the third liquid inlet 132 is used to introduce wastewater raw liquid. Specifically, the temperature of the wastewater concentrate is relatively high, and it needs to be cooled by the cooling device 1, and then the solid-liquid separation is performed by the solid-liquid separator 10 to precipitate the solid salt 101. The wastewater concentrate is cooled by the first heat exchange chamber 12 and the second heat exchange chamber 13. The first heat exchange chamber 12 is introduced into the external coolant, which can be cooling water, to circulate and cool the wastewater concentrate. The second heat exchange chamber 13 is introduced into the wastewater stock solution with a lower temperature to exchange heat with the wastewater concentrate with a higher temperature to increase the temperature of the wastewater stock solution, thereby effectively recovering the heat of the wastewater concentrate and reducing the power consumption of the coolant system that introduces the coolant. The design is ingenious.

[0022] The embodiment of the utility model designs an independent first heat exchange chamber 12 and a second heat exchange chamber 13 on the outer surface of the cooling tank body 11, and passes an external coolant into the first heat exchange chamber 12, and passes a wastewater raw liquid with a lower temperature into the second heat exchange chamber 13 for heat exchange, thereby effectively recovering heat and saving power consumption of the coolant system. The design is ingenious.

[0023] In the embodiment of the utility model, the first heat exchange chamber 12 is arranged on one side of the cooling tank body 11, and the second heat exchange chamber 13 is arranged on the other side of the cooling tank body 11. The distribution of the first heat exchange chamber 12 and the second heat exchange chamber 13 is reasonable.

[0024] Specifically, the first heat exchange chamber 12 is surrounded by the first U-shaped shell 121 and the outer surface of the cooling tank body 11, and the second heat exchange chamber 13 is surrounded by the second U-shaped shell 131 and the outer surface of the cooling tank body 11. Directly adopting the structure of the first U-shaped shell 121 and the second U-shaped shell 131 can more directly cool the outer surface of the cooling tank body 11, and the cooling effect is better.

[0025] In the embodiment of the utility model, Figure 2 As shown, the first U-shaped shell 121 is fixedly connected to the cooling tank body 11, the lower part of the first U-shaped shell 121 is provided with a second liquid inlet 122, and the upper part of the first U-shaped shell 121 is provided with a second liquid outlet 123; the second U-shaped shell 131 is detachably connected to the cooling tank body 11, the lower part of the second U-shaped shell 131 is provided with a third liquid inlet 132, and the upper part of the second U-shaped shell 131 is provided with a third liquid outlet 133. Specifically, cooling water is generally introduced into the first heat exchange chamber 12, which has fewer impurities, and the first U-shaped shell 121 can be directly connected to the cooling tank body 11 by welding or other fixed connection methods, while the second heat exchange chamber 13 is introduced into the wastewater raw liquid, which has more dirt, and the second U-shaped shell 131 is detachably and sealedly connected to the cooling tank body 11, which can facilitate inspection and cleaning of dirt, and the design is ingenious.

[0026] In the embodiment of the utility model, the first liquid inlet 111 is arranged at the upper part of the cooling tank body 11, the first liquid outlet 112 is arranged at the bottom of the cooling tank body 11, the first liquid outlet 112 is arranged between the lower end of the first U-shaped shell 121 and the lower end of the second U-shaped shell 131, the first U-shaped shell 121 extends along the outer surface of one side of the cooling tank body 11, and the second U-shaped shell 131 extends along the outer surface of the other side of the cooling tank body 11. Specifically, as Figure 2 and Figure 3 As shown, the first U-shaped shell 121 covers one side outer surface of the cooling tank body 11 as much as possible, and the second U-shaped shell 131 covers the other side outer surface of the cooling tank body 11 as much as possible to increase the heat exchange area and enhance the heat exchange effect.

[0027] like Figures 1 to 5 As shown, the embodiment of the utility model also provides an evaporation system 100, including a wastewater inlet 2, a heat exchanger 3, an exhaust condenser 4, a separation chamber 5 and the above-mentioned cooling device 1 which are connected in sequence, the wastewater inlet 2 is connected to the heat exchanger 3 through a first pipe 23, the heat exchanger 3 is connected to the exhaust condenser 4 through a second pipe 34, the separation chamber 5 is used for flash evaporation to generate secondary steam, and a concentrated liquid outlet 56 is provided at the bottom of the separation chamber 5, the concentrated liquid outlet 56 is connected to the first liquid inlet 111 of the cooling tank body 11 of the cooling device 1, the third liquid inlet 132 is connected to the first pipe 23, and the third liquid outlet 133 is connected to the second pipe 34. Specifically, as Figure 1As shown, the wastewater raw liquid enters the heat exchanger 3 and the exhaust condenser 4 from the wastewater inlet 2 in sequence and enters the separation chamber 5 from the wastewater inlet 51. The wastewater concentrate in the separation chamber 5 enters the cooling device 1 for cooling. The heat exchanger 3 is a plate heat exchanger. The temperature of the wastewater raw liquid is increased by passing the wastewater raw liquid with a lower temperature into the second heat exchange chamber 13 for heat exchange with the wastewater concentrate with a higher temperature. The heated wastewater raw liquid is then passed into the exhaust condenser 4 for further heat exchange and temperature increase, thereby effectively recovering the temperature of the wastewater concentrate and saving the power consumption of the coolant system. The design is ingenious.

[0028] In the embodiment of the utility model, the evaporation system 100 also includes a distilled water tank 6 and a heater 7. The lower part of the distilled water tank 6 is provided with a first distilled water outlet 61, the upper part of the distilled water tank 6 is provided with a distilled water inlet 62, and the first steam outlet 63 at the top of the distilled water tank 6. The first distilled water outlet 61 is connected to the heat exchanger 3 for heating the wastewater raw liquid, and the first steam outlet 63 is connected to the separation chamber 5; the heater 7 includes a fourth liquid inlet 71 and a fourth liquid outlet 72, and the heater 7 is also provided with a steam inlet 73, a second distilled water outlet 74 and a first The air outlet 75, the separation chamber 5 includes a circulating liquid outlet 53, a circulating liquid inlet 54 and a secondary steam outlet 57, the circulating liquid outlet 53 is connected to the fourth liquid inlet 71, the fourth liquid outlet 72 is connected to the circulating liquid inlet 54, the secondary steam outlet 57 is connected to the steam inlet 73 of the heater 7, the second distilled water outlet 74 is connected to the distilled water tank 6, the first air outlet 75 is connected to the exhaust condenser 4, the exhaust condenser 4 is also connected to the distilled water inlet 62 of the distilled water tank 6, and a steam compressor 8 is also connected between the secondary steam outlet 57 and the steam inlet 73 of the heater 7. Specifically, as Figures 1 to 5 As shown, the first steam outlet 63 is connected to the first air inlet 52 of the separation chamber 5 to discharge the steam in the distilled water tank 6 into the separation chamber 5, a circulating pump 20 is provided between the circulating liquid outlet 53 and the inlet of the heater 7, and a concentrated liquid pump 30 is provided between the concentrated liquid outlet 56 of the separation chamber 5 and the first liquid inlet 111 of the cooling device 1.

[0029] In the embodiment of the utility model, the evaporation system 100 further includes a steam generator 9, which is connected to the separation chamber 5. Specifically, Figure 1 As shown, the steam generator 9 is communicated with the second air inlet 55 of the separation chamber 5 .

[0030] The operation process of the evaporation system 100 of the embodiment of the utility model is as follows: at the initial stage of the operation of the evaporation system 100, a heat source is introduced by the steam generator 9 to preheat the evaporation system 100 until secondary steam is generated. When the evaporation system 100 is running stably, the wastewater raw liquid and the distilled water in the distilled water tank 6 are heat exchanged through the heat exchanger 3 to increase the temperature of the raw liquid and reduce the temperature of the distilled water discharged from the evaporation system 100. Generally, the amount of distilled water will be less than the amount of raw liquid, so the increase in the temperature of the wastewater raw liquid is lower than the temperature of the distilled water when it enters the heat exchanger 3. Here, part of the wastewater raw liquid is branched to the cooling device 1 and is heated by the hot wastewater concentrate. Part of the wastewater raw liquid exchanges heat with the distilled water, and the temperature of the concentrate is higher than the temperature of the distilled water. The temperature of the wastewater raw liquid in the two branches is greatly increased. The heated wastewater liquid enters the exhaust condenser 4 and exchanges heat with the saturated steam carried by the non-condensable gas discharged from the first outlet 75 of the heater 7, recovering the heat of the saturated steam and further increasing the temperature of the wastewater liquid. At this time, the temperature of the wastewater liquid entering the separation chamber 5 is closer to the saturation temperature. The circulating pump 20 pumps the wastewater liquid in the separation chamber 5 into the heater 7, and uses the secondary steam after the temperature and pressure are increased by the steam compressor 8 as a heat source to increase the temperature of the wastewater liquid. After the heated solution enters the relatively low temperature and low pressure environment of the separation chamber 5, it flashes and produces secondary steam. The wastewater concentrate is then pumped into the cooling device 1 through the concentrate pump 30 for cooling, and at the same time, it is cooled by part of the wastewater liquid and the external coolant. Due to the introduction of the wastewater liquid, the amount of cooling water is reduced, and the energy consumption is reduced, which is a clever design.

[0031] The above disclosure is only a preferred example of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A cooling device for an evaporation system, characterized in that: The cooling device includes a cooling tank body and a first heat exchange chamber and a second heat exchange chamber attached to the outer surface of the cooling tank body. The cooling tank body includes a first liquid inlet and a first liquid outlet. The first liquid inlet is used to introduce wastewater concentrate after flash evaporation. The first heat exchange chamber has a second liquid inlet and a second liquid outlet for introducing external coolant. The second heat exchange chamber has a third liquid inlet and a third liquid outlet. The third liquid inlet is used to introduce wastewater raw liquid.

2. The cooling device for an evaporation system according to claim 1, characterized in that: The first heat exchange chamber is arranged on one side of the cooling tank body, and the second heat exchange chamber is arranged on the other side of the cooling tank body.

3. The cooling device for an evaporation system according to claim 2, characterized in that: The first heat exchange chamber is surrounded by a first U-shaped shell and the outer surface of the cooling tank body, and the second heat exchange chamber is surrounded by a second U-shaped shell and the outer surface of the cooling tank body.

4. The cooling device for an evaporation system according to claim 3, characterized in that: The first U-shaped shell is fixedly connected to the cooling tank body, a second liquid inlet is provided at the lower portion of the first U-shaped shell, and a second liquid outlet is provided at the upper portion of the first U-shaped shell; the second U-shaped shell is detachably connected to the cooling tank body, a third liquid inlet is provided at the lower portion of the second U-shaped shell, and a third liquid outlet is provided at the upper portion of the second U-shaped shell.

5. The cooling device for an evaporation system according to claim 3, characterized in that: The first liquid inlet is arranged at the upper part of the cooling tank body, the first liquid outlet is arranged at the bottom of the cooling tank body, and the first liquid outlet is arranged between the lower end of the first U-shaped shell and the lower end of the second U-shaped shell.

6. The cooling device for an evaporation system according to claim 5, characterized in that: The first U-shaped shell extends along one side outer surface of the cooling tank body, and the second U-shaped shell extends along the other side outer surface of the cooling tank body.

7. An evaporation system, characterized in that: The invention comprises a wastewater inlet, a heat exchanger, an exhaust condenser, a separation chamber and a cooling device according to any one of claims 1 to 6 which are connected in sequence, wherein the wastewater inlet is connected to the heat exchanger through a first pipe, the heat exchanger is connected to the exhaust condenser through a second pipe, the separation chamber is used for flash evaporation to generate secondary steam, a concentrated liquid outlet is provided at the bottom of the separation chamber, the concentrated liquid outlet is connected to the first liquid inlet of the cooling tank body of the cooling device, the third liquid inlet is connected to the first pipe, and the third liquid outlet is connected to the second pipe.

8. The evaporation system according to claim 7, characterized in that The evaporation system also includes a distilled water tank and a heater, wherein a first distilled water outlet is provided at the lower portion of the distilled water tank, a distilled water inlet is provided at the upper portion of the distilled water tank, and a first steam outlet is provided at the top of the distilled water tank, wherein the first distilled water outlet is connected to the heat exchanger for heating the wastewater raw liquid, and the first steam outlet is connected to the separation chamber; the heater includes a fourth liquid inlet and a fourth liquid outlet, and the heater is also provided with a steam inlet, a second distilled water outlet and a first air outlet, and the separation chamber includes a circulating liquid outlet, a circulating liquid inlet and a secondary steam outlet, wherein the circulating liquid outlet is connected to the fourth liquid inlet, the fourth liquid outlet is connected to the circulating liquid inlet, the secondary steam outlet is connected to the steam inlet of the heater, the second distilled water outlet is connected to the distilled water tank, the first air outlet is connected to the exhaust condenser, and the exhaust condenser is also connected to the distilled water inlet of the distilled water tank.

9. The evaporation system according to claim 8, characterized in that A steam compressor is also connected between the secondary steam outlet and the steam inlet of the heater.

10. The evaporation system according to claim 8, characterized in that The evaporation system further includes a steam generator in communication with the separation chamber.

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