Triple-effect countercurrent evaporation system

Abstract

The utility model discloses a triple-effect countercurrent evaporation system which comprises a first evaporation assembly, a second evaporation assembly, a third evaporation assembly and an output assembly, and the first evaporation assembly comprises a triple-effect separator, a triple-effect heater and a third circulating pump; the second evaporation assembly comprises a second-effect separator, a second-effect heater and a second circulating pump; the third evaporation assembly comprises a first-effect separator, a first-effect heater and a first circulating pump; the output assembly comprises a thickening kettle, a centrifugal machine and a mother liquor tank which are sequentially communicated, the thickening kettle is used for stirring materials, the centrifugal machine is used for separating the materials, and the mother liquor tank is used for storing mother liquor generated by separating the materials; wherein the output end of the third-effect separator is communicated with the second-effect separator, the output end of the second-effect separator is communicated with the first-effect separator, the output end of the first-effect separator is communicated with the thickening kettle, and the output end of the mother liquor tank is communicated with the second-effect separator. According to the triple-effect countercurrent evaporation system, blockage can be avoided, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical industry, in particular to a triple-effect countercurrent evaporation system. Background Art

[0002] The triple-effect evaporation system mainly increases the concentration of the material by passing it through three evaporation stages. The existing triple-effect countercurrent evaporation system mainly inputs the material into the triple-effect separator, the second-effect separator and the first-effect separator in sequence for evaporation and concentration, and then centrifuges the concentrated material output from the first-effect separator into mother liquor and finished product, and then returns the mother liquor to the triple-effect separator for continued evaporation. However, the temperature of the mother liquor is higher than the temperature in the triple-effect separator, so the mother liquor is continuously cooled by the triple-effect separator to produce crystallized salt, which makes the triple-effect separator easily blocked, requiring shutdown for maintenance, affecting production efficiency. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention proposes a triple-effect countercurrent evaporation system that can avoid blockage and improve production efficiency.

[0004] According to the first embodiment of the present invention, the triple-effect countercurrent evaporation system includes a first evaporation component, a second evaporation component, a third evaporation component and an output component, the first evaporation component includes a triple-effect separator, a triple-effect heater and a third circulation pump, the third circulation pump is used to drive the material to circulate between the triple-effect separator and the triple-effect heater, and the triple-effect heater is used to heat the material; the second evaporation component includes a second-effect separator, a second-effect heater and a second circulation pump, the second circulation pump is used to drive the material to circulate between the second-effect separator and the second-effect heater, and the second-effect heater is used to heat the material; the third evaporation component includes a first-effect separator a separator, a first-effect heater and a first circulation pump, wherein the first circulation pump is used to drive the material to circulate between the first-effect separator and the first-effect heater, and the first-effect heater is used to heat the material; the output component includes a thickening kettle, a centrifuge and a mother liquid tank connected in sequence, the thickening kettle is used to stir the material, the centrifuge is used to separate the material, and the mother liquid tank is used to store the mother liquid generated by separating the material; wherein the output end of the three-effect separator is connected to the two-effect separator, the output end of the two-effect separator is connected to the first-effect separator, the output end of the first-effect separator is connected to the thickening kettle, and the output end of the mother liquid tank is connected to the two-effect separator.

[0005] According to the triple-effect countercurrent evaporation system of the embodiment of the present invention, there are at least the following beneficial effects: the first evaporation component, the second evaporation component, the third evaporation component and the output component are connected in sequence, the material is input into the triple-effect separator, and the material is driven by the third circulation pump to circulate between the triple-effect separator and the triple-effect heater to heat and evaporate the material, and then the material is input into the second-effect separator, and the material is driven by the second circulation pump to circulate between the second-effect separator and the second-effect heater to heat and evaporate the material, and then the material is input into the first-effect separator, and the material is driven by the first circulation pump to circulate between the first-effect separator and the first-effect heater to heat and evaporate the material, and finally the material is output into the thickening kettle, the material is stirred by the thickening kettle, and the material is output to the centrifuge for centrifugal separation, so that the material is separated into mother liquor and finished product, the mother liquor is stored in the mother liquor tank, and the output end of the mother liquor tank is connected to the second-effect separator, so that the mother liquor can be prevented from being cooled by the three-effect separator, thereby reducing the formation of crystals in the mother liquor, avoiding blockage, improving the reliability of the triple-effect countercurrent evaporation system, and improving production efficiency.

[0006] According to some embodiments of the present invention, the output end of the triple-effect separator is connected to the double-effect separator through a first pipeline, and the first pipeline is connected to a transfer pump, which is used to drive the material from the triple-effect separator to the double-effect separator.

[0007] According to some embodiments of the present invention, the triple-effect separator is connected to the transfer pump via a second pipeline.

[0008] According to some embodiments of the present invention, the first pipeline or the second pipeline is connected to a sampling valve.

[0009] According to some embodiments of the present invention, the first evaporation component further includes a loading component, which includes a material trough and a loading pump. The material trough, the loading pump and the three-effect separator are connected in sequence, and the loading pump is used to drive the material from the material trough to the three-effect separator.

[0010] According to some embodiments of the present invention, the feeding component also includes a controller, a liquid level sensor and a control valve. The liquid level sensor is connected to the three-effect separator. The liquid level sensor is used to detect the liquid level in the three-effect separator. The control valve is arranged between the feeding pump and the three-effect separator. The feeding pump, the liquid level sensor and the control valve are all electrically connected to the controller.

[0011] According to some embodiments of the present invention, a cooling component is further included, which includes a water tank and a water pump. The third circulation pump, the second circulation pump, and the first circulation pump are all connected to a cooling circuit, and the water pump is used to drive cooling water from the water tank into the cooling circuit.

[0012] According to some embodiments of the present invention, the thickening kettle is provided with a driving member and a stirring rod, the stirring rod is rotatably connected to the thickening kettle, and the driving member is used to drive the stirring rod to rotate.

[0013] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0015] Figure 1 A schematic diagram of a triple-effect countercurrent evaporation system according to an embodiment of the present invention;

[0016] Figure 2 This is a process flow chart of a triple-effect countercurrent evaporation system according to an embodiment of the present invention;

[0017] Figure 3 A schematic diagram of a thickening kettle of a triple-effect countercurrent evaporation system according to an embodiment of the present invention;

[0018] Figure 4 Schematic diagram of a triple-effect countercurrent evaporation system in the prior art.

[0019] Reference numerals:

[0020] First evaporation assembly 100, three-effect separator 110, three-effect heater 120, third circulation pump 130, first pipeline 141, transfer pump 142, second pipeline 143, sampling valve 144, feeding component 150, material tank 151, feeding pump 152, controller 153, liquid level sensor 154, control valve 155;

[0021] The second evaporation component 200, the second-effect separator 210, the second-effect heater 220, and the second circulation pump 230;

[0022] The third evaporation component 300, the first-effect separator 310, the first-effect heater 320, and the first circulation pump 330;

[0023] Output assembly 400, thickening kettle 410, driving member 411, stirring rod 412, centrifuge 420, mother liquid tank 430, output pump 431;

[0024] Cooling assembly 500 , water tank 510 , water pump 520 , cooling circuit 530 . DETAILED DESCRIPTION

[0025] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0027] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] In the related art, refer to Figure 4The triple-effect countercurrent evaporation system generally includes a triple-effect separator 110, a triple-effect heater 120, a second-effect separator 210, a second-effect heater 220, a first-effect separator 310, a first-effect heater 320, a thickening kettle 410, a centrifuge 420 and a mother liquid tank 430. The process flow is mainly to first put the material into the triple-effect separator 110, and heat the material in the triple-effect separator 110 through the triple-effect heater 120 to evaporate the water in the material in the triple-effect separator 110, and then the material enters the second-effect separator 210, and the second-effect heater The heater 220 heats the material in the second-effect separator 210, and then the material enters the first-effect separator 310, and the first-effect heater 320 heats the material in the first-effect separator 310, so that the material is evaporated and concentrated. Finally, the material enters the thickening kettle 410 and crystallizes in the thickening kettle 410. It is then input into the centrifuge 420 for centrifugal separation, so that the material can be separated into mother liquor and finished product. The mother liquor is stored in the mother liquor tank 430. By re-inputting the mother liquor into the third-effect separator 110 for continued evaporation and concentration, continuous production of the material is achieved.

[0030] Among them, the first-effect heater 320, the second-effect heater 220 and the third-effect heater 120 mainly heat the material by steam heating. The hot steam required for production is sequentially introduced into the first-effect heater 320, the second-effect heater 220 and the third-effect heater 120, so that the heating temperature of the first-effect heater 320, the second-effect heater 220 and the third-effect heater 120 gradually decreases. However, after the material is output from the first-effect separator 310, the temperature of the material is relatively high, so that the temperature of the mother liquor separated from the material is also relatively high, resulting in the temperature of the mother liquor being higher than the temperature in the third-effect separator 110. After the mother liquor is re-input into the third-effect separator 110, the mother liquor is continuously cooled by the third-effect separator 110, making it easy for the mother liquor to crystallize and clog in the third-effect separator 110, requiring shutdown for maintenance, affecting production efficiency, and more steam consumption required for heating the material in the system, which is not conducive to reducing energy consumption.

[0031] To this end, the utility model proposes a three-effect countercurrent evaporation system, which can avoid blockage, reduce maintenance frequency and improve production efficiency.

[0032] It is understandable that, referring to Figure 1 and Figure 2The triple-effect countercurrent evaporation system of the present invention comprises a first evaporation component 100, a second evaporation component 200, a third evaporation component 300 and an output component 400. The first evaporation component 100 comprises a triple-effect separator 110, a triple-effect heater 120 and a third circulation pump 130. The third circulation pump 130 is used to drive the material to circulate between the triple-effect separator 110 and the triple-effect heater 120, and the triple-effect heater 120 is used to heat the material; the second evaporation component 200 comprises a second-effect separator 210, a second-effect heater 220 and a second circulation pump 230. The second circulation pump 230 is used to drive the material to circulate between the second-effect separator 210 and the second-effect heater 220, and the second-effect heater 220 is used to heat the material; the third evaporation component 300 comprises a first-effect separator The separator 310, the first-effect heater 320 and the first circulation pump 330 are used to drive the material to circulate between the first-effect separator 310 and the first-effect heater 320, and the first-effect heater 320 is used to heat the material; the output component 400 includes a thickening kettle 410, a centrifuge 420 and a mother liquid tank 430 connected in sequence, the thickening kettle 410 is used to stir the material, the centrifuge 420 is used to separate the material, and the mother liquid tank 430 is used to store the mother liquid produced by the separation of the material; wherein, the output end of the triple-effect separator 110 is connected to the second-effect separator 210, the output end of the second-effect separator 210 is connected to the first-effect separator 310, the output end of the first-effect separator 310 is connected to the thickening kettle 410, and the output end of the mother liquid tank 430 is connected to the second-effect separator 210.

[0033] The first evaporation component 100, the second evaporation component 200, the third evaporation component 300 and the output component 400 are connected in sequence, and the material is input into the three-effect separator 110, and the third circulation pump 130 drives the material to circulate between the three-effect separator 110 and the three-effect heater 120 to heat and evaporate the material. Then the material is input into the second-effect separator 210, and the second circulation pump 230 drives the material to circulate between the second-effect separator 210 and the second-effect heater 220 to heat and evaporate the material. Then the material is input into the first-effect separator 310, and the first circulation pump 330 drives the material to circulate between the first-effect separator 310 and the first-effect heater 220 to heat and evaporate the material. The liquid circulates between the separators 320 to heat and evaporate the material, and finally the material is output to the thickening kettle 410, the material is stirred by the thickening kettle 410, and the material is output to the centrifuge 420 for centrifugal separation, so that the material is separated into a mother liquor and a finished product, and the mother liquor is stored in the mother liquor tank 430, and the output end of the mother liquor tank 430 is connected to the second-effect separator 210, so as to avoid the mother liquor being cooled by the three-effect separator 110, thereby reducing the crystallization of the mother liquor and avoiding blockage, thereby improving the reliability of the three-effect countercurrent evaporation system, improving production efficiency, and reducing the heating temperature required for the three-effect heater 120, thereby reducing steam consumption and reducing energy consumption.

[0034] It should be noted that, as the heating temperatures of the first-effect heater 320, the second-effect heater 220, and the third-effect heater 120 gradually decrease, the temperatures of the first-effect separator 310, the second-effect separator 210, and the third-effect separator 110 also gradually decrease. Moreover, after the material is output from the first-effect separator 310 to the thickening kettle 410, it is also necessary to undergo centrifugal separation in the centrifuge 420, so that the mother liquor can easily exchange heat with the outside world and reduce the temperature. By setting the mother liquor tank 430 to be connected to the second-effect separator 210, the temperature of the mother liquor is closer to the temperature of the second-effect separator 210 than the temperature of the first-effect separator 310, the second-effect separator 210, or the third-effect separator 110, thereby avoiding the mother liquor from being continuously cooled by the third-effect separator 110, thereby reducing the possibility of crystallization of the mother liquor, reducing the possibility of system blockage, and improving production efficiency.

[0035] In addition, an output pump 431 is provided between the mother liquid tank 430 and the secondary effect separator 210 , and the output pump 431 can drive the mother liquid to be output to the secondary effect separator 210 .

[0036] It is understandable that, referring to Figure 1 The output end of the triple-effect separator 110 is connected to the secondary-effect separator 210 via a first pipeline 141. The first pipeline 141 is connected to a transfer pump 142. The transfer pump 142 is used to drive the material from the triple-effect separator 110 to the secondary-effect separator 210. The triple-effect separator 110 and the secondary-effect separator 210 are connected via the first pipeline 141. The transfer pump 142 can conveniently transfer the material from the triple-effect separator 110 to the secondary-effect separator 210, so that the material can be efficiently transported to the secondary-effect separator 210, reducing energy consumption and loss of the material during the transfer process, allowing the material to maintain its original physical and chemical properties, and improving the reliability of the triple-effect countercurrent evaporation system.

[0037] It should be noted that after the material is evaporated and concentrated by the triple-effect separator 110 and the triple-effect heater 120, the viscosity of the material increases. The transfer pump 142 can smoothly transfer the material from the triple-effect separator 110 to the secondary effect separator 210, thereby improving the smoothness of material transportation.

[0038] Specifically, refer to Figure 1 The triple-effect separator 110 is connected to the transfer pump 142 via a second pipe 143. The two ends of the second pipe 143 are connected to the triple-effect separator 110 and the transfer pump 142, respectively. The material output by the transfer pump 142 can be returned to the triple-effect separator 110 via the second pipe 143, thereby preventing excessive material in the secondary-effect separator 210 and overloading the secondary-effect separator 210, thereby improving the reliability of the triple-effect countercurrent evaporation system.

[0039] It should be noted that, since the mother liquor tank 430 is connected to the second-effect separator 210, the mother liquor can be input into the second-effect separator 210, and at this time the third-effect separator 110 can also be input into the second-effect separator 210 through the first pipeline 141, which causes the material to enter the second-effect separator 210 too quickly. By setting the second pipeline 143, the material can be returned to the triple-effect separator 110, thereby avoiding overload of the second-effect separator 210 and improving the reliability of the triple-effect countercurrent evaporation system.

[0040] Specifically, refer to Figure 1 The first pipeline 141 or the second pipeline 143 is connected to a sampling valve 144. The sampling valve 144 is provided on the first pipeline 141 or the second pipeline 143 to enable real-time sampling during the material transportation process, thereby enabling detection and analysis of the properties, composition, and concentration of the material output by the first evaporation component 100. This not only helps to timely understand the status of the material, but also improves the quality control and troubleshooting convenience of the three-effect countercurrent evaporation system.

[0041] In addition, sampling valves 144 may also be provided between the second-effect separator 210 and the first-effect separator 310 , and between the first-effect separator 310 and the thickening tank 410 , which will not be described in detail here.

[0042] It is understandable that, referring to Figure 1 and Figure 2 The first evaporation assembly 100 further includes a loading component 150, which includes a material trough 151 and a loading pump 152. The material trough 151, the loading pump 152, and the three-effect separator 110 are sequentially connected. The loading pump 152 is used to drive the material from the material trough 151 to the three-effect separator 110. The material is stored in the material trough 151, and the material trough 151, the loading pump 152, and the three-effect separator 110 are sequentially connected. The loading pump 152 can drive the material from the material trough 151 to the three-effect separator 110, thereby realizing automatic material loading, reducing manual participation and labor intensity, and ensuring continuous production of the three-effect countercurrent evaporation system and improving efficiency.

[0043] Specifically, refer to Figure 1The feeding component 150 also includes a controller 153, a liquid level sensor 154, and a control valve 155. The liquid level sensor 154 is connected to the three-effect separator 110 and is used to detect the liquid level in the three-effect separator 110. The control valve 155 is arranged between the feeding pump 152 and the three-effect separator 110. The feeding pump 152, the liquid level sensor 154, and the control valve 155 are all electrically connected to the controller 153. The liquid level sensor 154 is connected to the three-effect separator 110. The feeding pump 152, the liquid level sensor 154, and the control valve 155 are all electrically connected to the controller 153. The liquid level in the three-effect separator 110 can be detected by the liquid level sensor 154, so that the controller 153 can control the feeding pump 152 and the control valve 155 to open or close, thereby realizing automatic input of materials, improving the stability of feeding, and improving the reliability of the three-effect countercurrent evaporation system.

[0044] Among them, when the liquid level sensor 154 detects that the liquid level in the three-effect separator 110 is lower than the preset value, the controller 153 outputs a control signal to open the control valve 155 and the feeding pump 152, allowing the material to be transported from the material tank 151 to the three-effect separator 110 through the feeding pump 152; when the liquid level sensor 154 detects that the liquid level in the three-effect separator 110 reaches or exceeds the preset value, the controller 153 will output a control signal to close the control valve 155 and the feeding pump 152 to stop the transportation of the material.

[0045] It is understandable that, referring to Figure 1 and Figure 2 , further comprising a cooling assembly 500, which includes a water tank 510 and a water pump 520. The third circulation pump 130, the second circulation pump 230, and the first circulation pump 330 are all connected to a cooling circuit 530. The water pump 520 is used to drive cooling water from the water tank 510 into the cooling circuit 530. The cooling water is stored in the water tank 510, and the water pump 520 can drive the cooling water from the water tank 510 into the cooling circuit 530, so that the cooling water can enter the third circulation pump 130, the second circulation pump 230, and the first circulation pump 330 respectively through the cooling circuit 530, thereby reducing the temperature of the third circulation pump 130, the second circulation pump 230, and the first circulation pump 330, extending their service life, and improving the reliability of the three-effect countercurrent evaporation system.

[0046] In addition, the transfer pump 142, the loading pump 152 and the output pump 431 can also be connected between the water tank 510 and the water pump 520 through the cooling circuit 530 to reduce the operating temperature and improve reliability.

[0047] It is understandable that, referring to Figure 1 and Figure 3The thickening kettle 410 is provided with a driving member 411 and a stirring rod 412. The stirring rod 412 is rotatably connected to the thickening kettle 410, and the driving member 411 is used to drive the stirring rod 412 to rotate. The stirring rod 412 is rotatably connected to the thickening kettle 410. The driving member 411 can drive the stirring rod 412 to rotate in the thickening kettle 410, so that the stirring rod 412 can stir the material in the thickening kettle 410, so that the material can be evenly distributed in the thickening kettle 410 and maintain good fluidity, thereby facilitating the output of the material and improving the reliability of the triple-effect countercurrent evaporation system.

[0048] It should be noted that the driving member 411 can be an electric motor, a hydraulic motor, etc., as long as it can drive the stirring rod 412 to rotate, and is not limited here.

[0049] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. Triple-effect countercurrent evaporation system, characterized in that: include: A first evaporation component includes a triple-effect separator, a triple-effect heater, and a third circulation pump, wherein the third circulation pump is used to drive the material to circulate between the triple-effect separator and the triple-effect heater, and the triple-effect heater is used to heat the material; The second evaporation component includes a second-effect separator, a second-effect heater and a second circulation pump, wherein the second circulation pump is used to drive the material to circulate between the second-effect separator and the second-effect heater, and the second-effect heater is used to heat the material; A third evaporation component includes a first-effect separator, a first-effect heater, and a first circulation pump, wherein the first circulation pump is used to drive the material to circulate between the first-effect separator and the first-effect heater, and the first-effect heater is used to heat the material; An output component includes a thickening kettle, a centrifuge, and a mother liquid tank that are sequentially connected, wherein the thickening kettle is used to stir the material, the centrifuge is used to separate the material, and the mother liquid tank is used to store the mother liquid generated by separating the material; Among them, the output end of the three-effect separator is connected to the two-effect separator, the output end of the two-effect separator is connected to the one-effect separator, the output end of the one-effect separator is connected to the thickening kettle, and the output end of the mother liquor tank is connected to the two-effect separator.

2. The triple-effect countercurrent evaporation system according to claim 1, characterized in that: The output end of the triple-effect separator is communicated with the double-effect separator via a first pipeline. The first pipeline is connected to a transfer pump, which is used to drive the material from the triple-effect separator to the double-effect separator.

3. The triple-effect countercurrent evaporation system according to claim 2, characterized in that: The triple-effect separator is connected to the transfer pump via a second pipeline.

4. The triple-effect countercurrent evaporation system according to claim 3, characterized in that: The first pipeline or the second pipeline is connected to a sampling valve.

5. The triple-effect countercurrent evaporation system according to claim 1, characterized in that: The first evaporation component further includes a feeding component, which includes a material trough and a feeding pump. The material trough, the feeding pump and the three-effect separator are connected in sequence, and the feeding pump is used to drive the material from the material trough to the three-effect separator.

6. The triple-effect countercurrent evaporation system according to claim 5, characterized in that: The feeding component also includes a controller, a liquid level sensor and a control valve. The liquid level sensor is connected to the three-effect separator. The liquid level sensor is used to detect the liquid level in the three-effect separator. The control valve is arranged between the feeding pump and the three-effect separator. The feeding pump, the liquid level sensor and the control valve are all electrically connected to the controller.

7. The triple-effect countercurrent evaporation system according to claim 1, characterized in that: It also includes a cooling component, which includes a water tank and a water pump. The third circulation pump, the second circulation pump, and the first circulation pump are all connected to a cooling circuit. The water pump is used to drive cooling water from the water tank into the cooling circuit.

8. The triple-effect countercurrent evaporation system according to claim 1, characterized in that: The thickening kettle is provided with a driving member and a stirring rod. The stirring rod is rotatably connected to the thickening kettle, and the driving member is used to drive the stirring rod to rotate.

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